JP6786306B2 - Box making machine - Google Patents

Description

The present invention manufactures a box having a polygonal tubular body, a plurality of lower flaps provided on the lower edge of the body, and a plurality of upper flaps provided on the upper edge of the body. Regarding the box machine.

It has a polygonal tubular body, a plurality of lower flaps provided on the lower edge of the body, and a plurality of upper flaps provided on the upper edge of the body so that the cross section of the body is octagonal. A box making machine for making a box body is known (for example, Patent Document 1). The box-making process performed by the box-making machine includes an opening process in which the body is opened into a substantially square cylinder from the folded state and a box in which the body is formed into an octagonal cylinder. The molding process to be performed is included. In the molding step, the case molding device is inserted into the inside of the body of the box, the case molding device is expanded, the body is expanded from the inside, and the body becomes an octagonal cylinder.

In the box opening process, two side surfaces connected by one side surface of the body surface are opened so as to form an angle of 90 degrees with each other. When the two side surfaces are opened at 90 degrees, a force is applied to the side surfaces of the body portion, and the force causes the creases provided in the body portion to break. By breaking the creases in the body, the sides other than the side opened by the box making machine are formed into a substantially quadrangular shape.

JP 2015-155311

However, in the box opening process, after the body is opened so as to form a square cylinder, it is formed into an octagonal cylinder, which takes time and effort, and the shape of the body tends to vary. There was a problem.

In view of the above background, it is an object of the present invention to provide a box making machine capable of opening a box in an octagonal tubular shape.

In order to solve the above problems, an octagonal tubular body (2P) having a plurality of side plates extending vertically and connected to each other via creases, and a plurality of bodies provided on the upper edge of the body. A box body (2) having an upper flap (2U) and a plurality of lower flaps (2L) provided on the lower edge of the body, and the body is formed into a cylinder from a state in which the body is folded flat. A box-making machine (1, 200, 300) equipped with a box-opening device for forming a box-opening state, wherein the box-opening device is provided on the side plate of the body and the upper edge of the side plate. Support members (18, 19, 43) provided with a flap (2U) and an engaging device (25, 35, 45) that detachably engages with at least one of the lower flaps provided on the lower edge of the side plate. The support device (12) is provided, and the support member supports the side plate by engaging the engagement device provided in the support device with the side plate, and at least two of the support members are supported. The support member supports two side plates connected to each other via one or more side plates, and the support device has a flat relative arrangement of the engaging devices provided on the support member. The closed form in which the support member is arranged so as to be equal to the relative arrangement of the side plates corresponding to the engagement device of the box body folded in, and the relative of the engagement device provided in the support member. It is configured to be displaceable to an open form in which the support member is arranged so that the arrangement is equal to the relative arrangement of the side plates corresponding to the engaging device of the box in the opened state. Good.

According to this aspect, among the side plates of the box having an octagonal tubular body, the relative arrangement of the two side plates connected via at least one side plate corresponds to the box in the opened state. Since it is arranged so as to be equal to the relative arrangement of the side plates, the box body is deformed so as to have an octagonal tubular body.

Further, in the above aspect, the box body is configured to be deformable so as to close the opening under the box body by bending the lower flap, and the body portion of the box body in the opened state is said. It may have the same shape as the body of the box, which has been deformed to close the opening under the box by bending the lower flap.

According to this aspect, after the box body is opened by the box opening device, the opening under the box body can be closed by bending the lower flap of the box body.

Further, in the above aspect, it is preferable that the support device includes three support members (18, 19, 43).

According to this aspect, since the three side plates of the box body are supported by the support member, the box body is accurately deformed so as to have an octagonal tubular body portion.

Further, in the above aspect, the support device (12) has a front support member (43) that supports the front side plate (2PA) and a rear side plate (2PE) that is arranged parallel to the front side plate in the opened state. Is connected to the rear support member (18) via one first intermediate side plate (2PB) and is connected to the rear side plate via one second intermediate side plate (2PD). It has a lateral support member (19) that supports a horizontal plate (2PC), and when the support device is in the open form, the lateral support member forms approximately 90 degrees with respect to the rear support member. The front support member is smaller than the sum of the widths of the first intermediate side plate, the horizontal side plate, and the second intermediate side plate with respect to the rear support member, and is larger than the width of the horizontal side plate. It is preferable that they are arranged in parallel through each other.

According to this aspect, the rear side plate and the side plate form an angle of about 90 degrees with each other, the side plate and the front side plate form an angle of about 90 degrees with each other, and the rear side plate and the front side plate are arranged so as to be parallel to each other. Therefore, the box body is accurately deformed so as to have an octagonal tubular body.

Further, in the above aspect, the crease between the second intermediate side plate (2PD) and the rear side plate (2PE) or the crease between the second intermediate side plate and the lateral side plate (2PC) becomes flat. It is preferable to form a side edge of the body of the box in the folded state.

According to this aspect, since the rear side plate and the horizontal side plate are provided across the folded crease in the folded state of the box, when the rear side plate and the horizontal side plate are opened at an angle, , The body is easily deformed into an octagonal cylinder.

Further, in the above aspect, when the support device is in the closed form, the side plate corresponding to one of the front support member, the lateral support member, and the rear support member is supported. Supporting the device at the position of the side plate with respect to the support member when in the open form,
The support member other than the one support member may support the engaging device provided on the support member so as to be displaceable in the extending direction thereof.

According to this aspect, one of the front support member, the lateral support member, and the rear support member supports the side plate corresponding to the support member at the position of the side plate with respect to the support member when the support device is in the open form. Therefore, an actuator is not required between the support member and the engaging device provided on the support member, and the structure of the box making machine is simplified.

Further, in the above aspect, the front support member supports the front engaging device in a displaceable direction thereof, and the lateral support member supports the lateral engaging device in a displaceable direction in the extending direction. The rear support member displaceably supports the rear engagement device in its extending direction, and the front engagement device is placed between the front engagement device and the front support member with respect to the front support member. A front drive device (49) that displaces the support member along the extending direction is provided, and the rear engagement device is placed between the rear engagement device and the rear support member with respect to the rear support member. A rear drive device (28) that displaces the rear support member along the extending direction is provided, and when the support device is deformed from the closed form to the open form, the front drive device changes to the front engagement device. Is displaced from the initial position to a predetermined rear position, and the rear drive device may displace the rear engagement device from the initial position to a predetermined rear position.

According to this aspect, when the support device is opened, the corresponding drive device displaces the front side plate and the rear side plate, so that the box body is deformed so as to have an octagonal tubular body portion more accurately. Will be done.

Further, in the above embodiment, the front drive device and the rear drive device are stopped, and the support device is deformed from the closed form to the open form, so that the box is opened in a square tubular shape. It should be done.

According to this aspect, the box making machine deforms the box body so as to have a square tubular body when the drive device is stopped, and the box body is octagonal tubular when the drive device is driven. It can be deformed to have the body of the.

Further, in the above embodiment, the support device is attached to a base, a set of equilong swing links (16) rotatably connected to the base, and the tips of the swing links. It has a parallel link mechanism (15) with an intermediate link (17) rotatably connected, the rear support member being supported by the intermediate link, and the lateral support member being supported by one of the swing links. It should be done.

According to this aspect, the support device is deformed between a closed form in which the rear support member and the lateral support member extend in parallel with each other and an open form in which the rear support member and the lateral support member are opened so as to have an angle with each other. It is configured to be possible.

Further, in the above aspect, the box body is formed by two parallel plate members (2F, 2B) and a plate-shaped member having a core (2M) having a corrugated cross section sandwiched between them. It is preferable that the upper end surface of the upper flap is provided with a corrugated cross section of the core, and each of the engaging devices has a pin (27) that pierces the end surface of the upper flap.

According to this aspect, the engaging device engages with the upper flap by inserting a pin into the hollow portion of the core.

Further, in the above aspect, the bending device (50) for sandwiching and bending the lower flap (2LO) is provided, and the folding device includes two members (55A, 55B) arranged through a gap. A displacement device (56) for changing the distance between the two members is provided, and the lower flap is gripped by the two members when the displacement device changes the distance between the two members, and the engaging device and the upper surface are gripped. It is desirable that the engagement with the flap can be released.

According to this aspect, when the lower flap is gripped by the bending device and the support device moves upward, the engagement between the engaging device and the upper flap is disengaged, and the box can be transferred.

Further, in the above aspect, it is preferable to have a molding apparatus (61) for forming the body portion into an octagonal tubular shape by expanding the body portion in a predetermined width direction.

According to this aspect, the body of the box is more accurately molded into an octagonal cylinder.

Further, in the above aspect, the molding apparatus may engage with the lower flap, bend the lower flap, and arrange the lower flap at a predetermined position to expand the body portion in a predetermined width direction.

According to this aspect, the body can be expanded without inserting the molding apparatus into the body inside.

Further, in the above aspect, the molding apparatus may spread the body portion in a predetermined width direction by adsorbing the side plate to the outer surface of the side plate of the body portion and arranging the side plate at a predetermined position.

According to this aspect, the body portion is expanded and the body portion is accurately molded without inserting the molding apparatus into the body portion inside.

According to the above configuration, it is possible to provide a box making machine capable of opening a box in an octagonal tubular shape.

Side view of the box making machine according to the embodiment (A) A perspective view showing the sealed state of the octagonal box, (B) a plan view showing the blank state of the octagonal box, and (C) a plan view showing the flatly folded state of the octagonal box. (D) A perspective view showing a tetragonal cylinder state of an octagonal box, (E) a cross-sectional view of the tetragonal cylinder state (F) Perspective view showing the opened state of the octagonal box, (G) Cross-sectional view of the opened state, (H) Perspective view showing the bottom assembled state of the octagonal box (A) Cross-sectional view of the corrugated cardboard sheet having creases in the direction perpendicular to the flow direction in the flow direction, and (B) Cross-sectional view of the corrugated cardboard sheet having creases in the flow direction in the direction perpendicular to the flow direction. (A) A perspective view showing the sealed state of the quadrangular box, (B) A plan view showing the flatly folded state of the quadrangular box, (C) A perspective view showing the opened state of the quadrangular box, (D) Perspective view showing the bottom assembly state of the quadrangular box Perspective view of the box opening device of the box making machine according to the first embodiment when the support device is in the closed form. Perspective view of the box-opening device of the box-making machine according to the first embodiment when the support device is in an open form and the box is opened so as to have an octagonal tubular body. Top view of the box opening device of the box making machine according to the first embodiment when the support device is in the closed form. Top view of the box-opening device of the box-making machine according to the first embodiment when the support device is in an open form and the box is opened so as to have an octagonal tubular body. Side view of the box opening device of the box making machine according to the first embodiment when the support device is in an open form and the box is opened so as to have an octagonal tubular body. Front view before (A) and after (B) bending the lower flap of the folding device of the box making machine according to the first embodiment. Top view before (A) and after (B) molding of the molding apparatus of the box making machine according to the first embodiment. Rear view before (A) and after (B) molding of the molding apparatus of the box making machine according to the first embodiment. Top view of the transport device and the straightening device of the box making machine according to the first embodiment Top view and side view of the straightening device of the box making machine according to the first embodiment. Top view of the box opening device of the box making machine according to the second embodiment when the support device is in the closed form. Top view of the box-opening device of the box-making machine according to the second embodiment when the support device is in an open form and the box is opened so as to have an octagonal tubular body. Top view of the box opening device of the box making machine according to the third embodiment when the support device is in the closed form. Top view of the box-opening device of the box-making machine according to the third embodiment when the support device is in an open form and the box is opened so as to have an octagonal tubular body. Top view of the box opening device of the box making machine according to the third embodiment when the box is opened so as to have a square tubular body.

Hereinafter, embodiments of the box making machine of the present invention will be described with reference to the drawings.

(Box)
The box body manufactured by the box making machine 1 according to the embodiment is a polygonal box, an octagonal box 2 as shown in FIG. 2 (A), and a quadrangular box 3 as shown in FIG. 6 (A). including. Each box has a polygonal tubular body portion P extending vertically, and an upper flap U and a lower flap L provided on the upper edge and the lower edge of the body portion P, respectively.

(Octagonal box)
As shown in FIGS. 2A and 2B, the octagonal box 2 has an octagonal tubular body 2P whose axis extends vertically, four upper flaps 2U provided on its upper edge, and the like. It has four lower flaps 2L provided on its lower edge. The body 2P forms each side surface of the octagonal box 2, in the order of front panel 2PA, left front panel 2PB, left panel 2PC, left rear panel 2PD, rear panel 2PE, right rear panel 2PF, right panel 2PG, and right front panel 2PH. They have and are connected via creases. The upper flap 2U and the lower flap 2L are folded so as to form an angle of approximately 90 degrees with respect to the panel of the body portion to form an octagonal box.

As shown in FIGS. 5A and 5B, the octagonal box 2 has two plate-shaped members, a front liner 2F and a back liner 2B, and a wave-shaped cross section sandwiched between them. It is formed of a plate-like material having a core 2M (for example, a corrugated cardboard sheet). The box is formed so that the flow direction of the waveform of the core 2M is parallel to the circumferential direction of the body portion 2P forming an octagon. The crease 2CR between the panels constituting the body 2P (for example, the crease between the front panel 2PA and the left front panel 2PB) is formed so as to be parallel to the flow direction as shown in FIG. 5 (A). Has been done. On the other hand, the crease 2S between the panels 2PA to 2PE constituting the body portion 2P, the upper flap 2U, and the lower flap 2L is formed so as to be perpendicular to the flow direction as shown in FIG. 5 (B). There is.

As shown in FIGS. 5A and 5B, the creases are formed by making streaks from the back liner 2B so as to crush the peaks and valleys of the core 2M. As a whole, the crease 2S formed perpendicular to the flow direction is less likely to break than the crease 2CR formed parallel to the flow direction, and has a stronger force to resist the bending force. Since the creases between the panels constituting the body 2P are formed so as to be parallel to the flow direction, the creases between the panels of the body 2P are between the body 2P and the upper and lower flaps 2U and 2L. It is easier to bend than the creases of. Further, the crease 2CR parallel to the flow direction has a property that it is easy to bend so that the front liner 2F is convex and protrudes, and it is difficult to bend so that the back liner 2B is convex and protrudes, so that the body 2P is opened. Allows the flatly folded box to be opened into an octagonal tube. Further, by utilizing the fact that the creases become easier to break as the peaks and valleys of the waveform of the core 2M are greatly crushed, the foldability of the folds of the body portion 2P and the upper and lower flaps 2U and 2L is changed.

As shown in FIGS. 2 (B), (C), 3 (D), (E), and 4 (F) to (H), the octagonal box 2 differs depending on the arrangement of the body 2P and the flap. Transforms into. As shown in FIG. 2B, the state in which the body portion 2P is expanded and the upper and lower flaps 2U and 2L are arranged on the same plane as the body portion 2P is a blank state of the octagonal box 2. As shown in FIG. 2C, the state in which the tubular body 2P is folded flat and the upper and lower flaps 2U and 2L extend in the same direction as the body 2P is the octagonal box 2. It is in a folded state. As shown in FIGS. 3 (D) and 3 (E), the body 2P is opened so as to form a square cylinder from the folded state of the box, and the upper and lower flaps 2U and 2L are the axes of the body 2P. The state extending in the same direction as is a quadrangular cylinder state. As shown in FIGS. 4 (F) and 4 (G), the body P is opened so as to form an octagonal cylinder, and the upper and lower flaps 2U and 2L extend in the same direction as the axis of the body 2P. Is in the open state. As shown in FIG. 2A, the state in which the body 2P is formed in a predetermined state and the upper and lower flaps 2U and 2L are bent so as to close the upper and lower openings of the body 2P is a sealed state. Is. As shown in FIG. 4H, the state in which the body 2P is formed in a predetermined state and the lower flap 2L is bent so as to be orthogonal so as to close the opening under the body 2P is the bottom assembly state. ..

FIG. 2B shows a blank state of the octagonal box 2. The body 2P is connected via a crease in the order of rear panel 2PE, right rear panel 2PF, right panel 2PG, right front panel 2PH, front panel 2PA, left front panel 2PB, left panel 2PC, and left rear panel 2PD, and is one flat plate. Is doing. The upper flap 2U and the lower flap 2L are connected above and below the panel of the body portion 2P. The upper flap 2U includes a front upper flap 2UA provided on the upper edge of the front panel 2PA, an upper left flap 2UB provided on the upper edge of the left panel 2PC, and a rear upper flap 2UC provided on the upper edge of the rear panel 2PE. And the upper right flap 2UD provided on the upper edge of the right panel 2PG. The lower flap 2L includes a front lower flap 2LA provided on the upper edge of the front panel 2PA, a lower left flap 2LB provided on the upper edge of the left panel 2PC, and a rear lower flap 2LC provided on the upper edge of the rear panel 2PE. And a lower right flap 2LD provided on the upper edge of the right panel 2PG.

As shown in FIG. 2B, a coupling piece 2J is provided on the rear side edge of the right rear panel 2PF via a crease. In the blank box, the body 2P is formed into a tubular shape by connecting the bonding piece 2J to the inner surface of the rear panel 2PE. In the flatly folded state, the body 2P is folded so as to form 360 degrees at the crease between the front panel 2PA and the right front panel 2PH and the crease between the rear panel 2PE and the left rear panel 2PD. , The octagonal box 2 is in the shape of a flat plate. As shown in FIG. 2C, in the flatly folded state, the left front panel 2PB, the left panel 2PC, the left rear panel 2PD, the front panel 2PA, the upper left flap 2UB, the lower left flap 2LB, the front upper flap 2UA, and The lower front flap 2LA forms one flat plate. The right rear panel 2PF, the right panel 2PG, the right front panel 2PH, the rear panel 2PE, the upper right flap 2UD, the lower right flap 2LD, the rear upper flap 2UC and the rear lower flap 2LC also form one different flat plate. The upper end of the upper flap 2U and the lower end of the lower flap 2L have the same height in the vertical direction, and the corrugated cross section of the core 2M is exposed on the upper end side surface of the upper flap 2U.

As shown in FIGS. 3 (D) and 3 (E), in the quadrangular tubular state, the body portion 2P has a quadrangular tubular shape with an axis extending vertically. The left front panel 2PB, the left panel 2PC and the left rear panel 2PD form a flat plate, and the right front panel 2PH, the right panel 2PG and the right rear panel 2PF also form a flat plate, and the two flat plates are positioned so as to be parallel to each other. The front panel 2PA and the rear panel 2PE are parallel to each other, and other panels are arranged so as to connect both ends of the two flat plates, and the cross section of the body portion 2P is formed in a rectangular shape. The upper flap 2U and the lower flap 2L are connected to the panel to which the respective flaps are directly connected via a crease and extend in the vertical direction. The upper end of the upper flap 2U and the lower end of the lower flap 2L are provided so as to have the same height in the vertical direction, and a corrugated cross section of the core 2M is exposed on the upper end side surface of the upper flap 2U.

As shown in FIGS. 4 (F) and 4 (G), in the opened state, the body portion 2P is formed so as to form an octagonal tubular shape having an axis extending vertically. In the body 2P, the front panel 2PA, the left front panel 2PB, the left panel 2PC, the left rear panel 2PD, the rear panel 2PE, the right rear panel 2PF, the right panel 2PG, and the right front panel 2PH are connected via creases. Is bent at a predetermined angle. The upper flap 2U and the lower flap 2L are arranged so as to be parallel to the panel of the body portion 2P to which the respective flaps are directly connected. The front panel 2PA and the rear panel 2PE are arranged in parallel with their faces facing the front and back at a distance. The left panel 2PC and the right panel 2PG are arranged in parallel with their faces facing left and right and separated from each other. The left front panel 2PB, the left rear panel 2PD, the right rear panel 2PF, and the right front panel 2PH are arranged so as to chamfer the corners of the square cylinder formed by the front panel 2PA, the left panel 2PC, the rear panel 2PE, and the right panel 2PG. Has been done.

As shown in FIG. 2 (A), in the sealed state, the body portion 2P is formed so as to form an octagonal cylinder. The tip edges of the upper left flap 2UB and the upper right flap 2UD are adhered by an adhesive tape T extending back and forth. Similarly, the tip edges of the lower left flap 2LB and the lower right flap 2LD are adhered by an adhesive tape T extending back and forth. The front end of each adhesive tape T is adhered to the front panel 2PA, and the rear end is adhered to the rear panel 2PE.

As shown in FIG. 4 (H), in the bottom-assembled state, the body portion 2P is formed so as to form an octagonal cylinder, the lower flap 2L is bent at a right angle to each panel of the body portion 2P, and the lower left flap 2LB. And the tip edge of the lower right flap 2LD is adhered by an adhesive tape T extending back and forth, and the upper flap 2U is opened upward.

(Square box)
As shown in FIGS. 6A to 6D, the quadrangular box 3 is connected to the quadrangular tubular body 3P whose axis extends vertically and to the upper edge of the body 3P via a crease. It has one upper flap 3U and four lower flaps 3L connected to the lower edge of the body 3P via a crease. The body portion 3P has a front panel 3PA, a left panel 3PC, a rear panel 3PE, and a right panel 3PG forming each side surface of the quadrangular cylinder in the order described. As shown in FIG. 6A, in the sealed state, the front panel 3PA and the rear panel 3PE are arranged in parallel with their faces facing the front and back and separated from each other. The left panel 3PC and the right panel 3PG are arranged in parallel with their faces facing left and right and separated from each other.

As shown in FIGS. 6C and 6D, the lower flap 3L corresponds to the lower edges of the front panel 3PA, the left panel 3PC, the rear panel 3PE, and the right panel 3PG, respectively, with the front lower flap 3LA and the lower left. It has a flap 3LB, a lower rear flap 3LC, and a lower right flap 3LD. The upper flap 3U has a front upper flap 3UA, an upper left flap 3UB, a rear upper flap 3UC, and an upper right flap 3UD, which are vertically symmetrical with the lower flap 3L.

As shown in FIG. 6B, when the quadrangular box 3 is folded, the body 3P is between the crease between the front panel 3PA and the right panel 3PG, and between the rear panel 3PE and the left panel 3PC. At the crease, the quadrangular box 3 is bent so as to form 360 degrees, and the quadrangular box 3 is in a flat plate shape. As shown in FIG. 6C, in the opened state of the quadrangular box 3, the body 3P has a rectangular rectangular tubular shape with an axis extending vertically. The front panel 3PA and the rear panel 3PE are arranged so as to be parallel and opposite to each other. The right panel 3PG is provided so as to connect the right end edge of the front panel 3PA and the right end edge of the rear panel 3PE, and the left panel 3PC is provided so as to connect the left end edge of the front panel 3PA and the left end edge of the rear panel 3PE. Has been done. The upper flap 3U and the lower flap 3L are connected to the panel to which the respective flaps are directly connected via a crease and extend in the vertical direction. The upper end of the upper flap 3U and the lower end of the lower flap 3L are provided so as to have the same height in the vertical direction, and a corrugated cross section of the core 2M is exposed on the upper end side surface of the upper flap 3U. As shown in FIG. 6 (A), in the sealed state, the upper and lower flaps 3U and 3L are bent at right angles to each panel of the body 3P, and the tip edges of the upper left flap 3UB and the upper right flap 3UD and the lower left flap. It is a state in which the tip edges of the 3LB and the lower right flap 3LD are adhered by an adhesive tape T extending back and forth. As shown in FIG. 6 (D), in the bottom-assembled state, the body portion 3P is formed so as to form a square cylinder as in the box-opened state, and the lower flap 3L is perpendicular to each panel of the body portion 3P. It is bent, and the lower left flap 3LB and the tip edge of the lower right flap 3LD are adhered by an adhesive tape T extending back and forth, and only the upper flap is opened.

<< First Embodiment >>
The box-making machine 1 according to the first embodiment is arranged along a center line extending in the front-rear direction. The box making machine 1 separates the loaded and folded octagonal boxes 2 (hereinafter referred to as box 2) into individual bodies, and the body 2P of the separated box 2 is an octagonal tube. The box 2 is opened so as to form a shape, the lower flap 2L is bent, the body 2P is formed into an octagonal cylinder, the lower flap 2L is taped, and the box 2 is deformed into a bottom-assembled state. , Send forward.

(Supply device)
As shown in FIG. 1, the box-making machine 1 is provided with a supply device 5 that separates and sends out a plurality of boxes 2 in a folded state at the rear end. The supply device 5 includes a mounting table 6 having a slope with a lowered front end, and a plurality of boxes 2 in a folded state on the mounting table 6 are supported. A plurality of folded boxes 2 are placed on the mounting table 6 so as to stand upright on the slope thereof, face the main surface in the front-rear direction, and line up in the front-rear direction. A pressing body 7 is provided on the mounting table 6, and the pressing body 7 presses the box body 2 forward from the rear end of the mounted box body 2 by using a cylinder or the like as a driving force.

As shown in FIGS. 1, 7 and 8, an injector plate 8 for separating the boxes 2 into one body is provided at the front end of the mounting table 6. The upper edge of the injector plate 8 has a width of about the thickness of one box 2 in the front-rear direction, and is a surface facing upward, which is a supply support surface 9, which continues to the front side of the supply support surface 9 and is upward. Protruding projectiles are provided. The injector plate 8 is configured to be movable between an initial position where the supply support surface 9 is at the same height as the front end of the mounting table 6 and a supply position provided above the initial position.

Next, the operation of the supply device 5 will be described. Of the boxes 2 mounted on the mounting table 6 and urged forward, one box 2 located in the foreground is pushed out to the supply support surface 9 and abuts against the projecting pieces. Since the front-rear width of the supply support surface 9 is about the thickness of one box, one box 2 moves to the supply support surface 9. After the one box 2 moves to the supply support surface 9, the injector plate 8 moves from the initial position to the supply position, so that the one box 2 moves upward and is sent out. When the delivery of one box 2 is completed, the injector plate 8 returns to the initial position. When the injector plate 8 returns to the initial position, one of the boxes 2 mounted on the mounting table 6 is pushed out from the mounting table 6 to the supply support surface 9.

(Box opening device)
As shown in FIGS. 7 and 8, the box making machine 1 receives the box 2 sent from the supply device 5 and opens the box opening device 10 so that the body 2P thereof has an octagonal tubular shape. Is provided on the front side of the supply device 5. As shown in FIGS. 9 and 10, the box-opening device 10 supports the box-opening device base 11 provided on the front side of the mounting table 6 and the box-opening device base 11 so as to be vertically displaceable above the box-opening device base 11. It is provided with a support device 12 having a mechanism for supporting two side surfaces of the body portion 2P and displace those side surfaces, and a first actuator 13 for moving the support device 12 up and down.

As shown in FIGS. 9, 10 and 11, the support device 12 includes a support base 14 provided on the front side of the left end of the mounting base 6 and a parallel link mechanism 15 connected to the support base 14. There is. The parallel link mechanism 15 comprises a set of equilong swing links 16 rotatably connected to the support base 14 and intermediate links 17 rotatably connected to the tips of the swing links 16. Be prepared. The base end of the swing link 16 has two points (points P and Q in FIGS. 9 and 10) provided on the support base 14 in the front-rear direction, and a line extending in the vertical direction through the points is an axis. It is rotatably supported. The tips of the swing links 16 are each connected to the intermediate link 17. In this embodiment, as shown in FIG. 11, the swing links 16 are formed in pairs up and down, and both are coupled to one intermediate link 17.

A first support member 18 extending to the right is connected to the right side surface of the intermediate link 17. Of the two links of the swing link 16, a second support member 19 extending in the horizontal direction is connected to the front surface of the front link. The second support member 19 is provided with a rail (not shown) extending in the extending direction of the second support member 19.

The support device 12 is displaced between the closed form and the open form by the rotation of the swing link 16. As shown in FIG. 9, when the support device 12 is in the closed form, the first support member 18 and the second support member 19 extend to the left and right in parallel with each other. The first support member 18 is on the front side of the supply device 5 and is arranged behind the second support member 19. As shown in FIG. 10, when the support device 12 is in the open form, the second support member 19 is left in a plan view with respect to a point Q which is a connection point between the support base 14 and the swing link 16. It rotates around and opens until the first support member 18 and the second support member 19 form an angle of approximately 90 degrees. In the following, if necessary, with reference to the open state of the support device 12, the ends of the first support member 18 and the second support member 19 on the side close to each other as the proximal end, and the ends on the sides distant from each other as the proximal end. Is described as the distal end.

A first engaging device 25 is provided on the side surface of the first support member 18. As shown in FIG. 11, the first engaging device 25 includes a plate-shaped first engaging device main body 26 having a surface facing forward and backward, and a pin 27 coupled to the first engaging device main body 26. The base end of the pin 27 is coupled to the first engaging device main body 26, extends downward from the base end with a gap in the first engaging device main body 26, and the tip thereof protrudes downward in a needle shape. It is formed. The tip of the pin 27 can be pierced from the end surface of the upper flap 2U into the gap formed between the front liner 2F, the back liner 2B, and the core 2M constituting the box 2, and the pin 27 is on the top. It is formed so thick that a frictional force is generated between the pin 27 and the box 2 when it is stabbed in the end face of the flap 2U. In the present embodiment, the first engaging device 25 is fixed to the first support member 18.

The second support member 19 is provided with a second engaging device 35 that can slide in the extending direction thereof. The second engaging device 35 is coupled to the second supporting member 19 with the second engaging device main body 36 formed in a plate shape extending along the extending direction and the vertical direction of the second supporting member 19. It includes a slider (not shown) and a pin 27. The pin 27 provided in the second engaging device 35 is the same as the pin 27 provided in the first engaging device 25, is formed in a needle shape, and is inserted into the box 2 from the end face of the upper flap 2U of the box 2. It is engaged with the box 2. The slider is slidably coupled to the rail of the second support member 19. By connecting the slider and the rail, the second engaging device main body 36 is supported by the second support member 19 so as to be slidably movable in its extending direction. Two box opening urging devices 38 are provided between the second support member 19 and the second engaging device main body 36. One of the box-opening urging devices 38 is coupled to the distal end side of the second support member 19 at one end thereof, extends toward the proximal end side of the second support member 19, and the second engagement device main body 36 is at the other end. Is bound to. The other opening urging device 38 is coupled to the proximal end side of the second support member 19 at one end thereof, extends to the distal end side of the second support member 19, and the second engagement device main body 36 at the other end. Is bound to. Since the second engaging device 35 is urged to the distal end side and the proximal end side of the second support member 19 by the two opening urging devices 38, respectively, the second engaging device 35 When the pin 27 and the upper flap 2U are disengaged, the second engaging device 35 returns to a predetermined initial position. In this embodiment, a tension coil spring is used as the box opening urging device 38.

As shown in FIGS. 9 and 10, the box opening device 10 is further provided with a first frame 41 that is coupled to the intermediate link 17 and extends forward. A second frame 42 extending in the front-rear direction is connected to the right end of the first support member 18. The first frame 41 and the second frame 42 are formed parallel to each other, and each of the first frame 41 and the second frame 42 is provided with rails extending in the extending direction (front-back direction) thereof. A third frame 43 extending to the left and right is coupled to the first frame 41 and the second frame 42. Sliders slidably connected to the rails of the first frame 41 and the second frame 42 are provided at both left and right ends of the third frame 43, and the third frame 43 is front-reared by the first frame 41 and the second frame 42. It is supported so that it can be moved to. The first frame 41, the second frame 42, and the third frame 43 are above the first support member 18 and the second support member 19 so as not to collide with the first support member 18 and the second support member 19. It is provided. On the upper side of the third frame 43, a rail extending in the extending direction (left-right direction) of the third frame 43 is provided. In the present embodiment, in order to support the first frame 41 and the second frame 42, a frame 41F extending to the left and right is provided between them.

A slider is slidably coupled to the rail of the third frame 43, and a third support member 44 having a rearward surface is coupled to the rail. The rail of the third frame 43 and the slider slidably connected to the rail allow the third support member 44 to move along the extending direction of the third frame 43. A third engaging device 45 is provided on the surface of the third support member 44 facing rearward. Similar to the second engaging device 35, the third engaging device 45 is formed in a plate shape extending along the extending direction and the vertical direction of the third supporting member 44, and has a third engaging device having a rearward surface. It includes a device body 46 and a plurality of pins 27 formed on the surface thereof, extending downward, and engaging with the end surface of the upper flap 2U. In the present embodiment, the third engaging device 45 is fixed to the third support member 44. Further, a box opening stopper member 48 is provided on the rail of the third frame 43 in order to restrict the movement of the third support member 44 to the left.

When the support device 12 is in the closed form, the third engaging device main body 46 is located on the right side of the second engaging device main body 36, and the first engaging device main body 26, the second engaging device main body 36, and the third engagement device 12 are engaged. The uniting device main body 46 is arranged so as to be parallel to each other through a gap of about the thickness of the box 2. The third engaging device main body 46 is coupled to the distal end side of the second engaging device main body 36 via the connector 47. In the present embodiment, the connector 47 is configured by using an L-shaped metal fitting, and the second engaging device main body 36 and the connector 47 are connected by a hinge having a hinge axis in the vertical direction. Therefore, the third engaging device main body 46 moves so as to rotate with respect to the second engaging device main body 36 with its hinge axis as an axis. Further, the second engaging device main body 36 is provided with a connecting tool stopper member 47S in order to regulate the rotation angle of the connecting tool 47 with respect to the second engaging device main body 36.

Next, the operation of the box opening device 10 will be described. The box-opening device 10 operates to deform the box body 2 from the folded state to the box-opening state in which the body 2P has an octagonal tubular shape. In the opened state, the front panel 2PA and the rear panel 2PE of the box 2 are formed in parallel, and the left panel 2PC and the right panel 2PG form an angle of approximately 90 degrees with respect to the front panel 2PA, and the left panel 2PC and the rear panel 2PC are rearward. The distance between the left end of the panel 2PE in the left-right direction (Z in FIG. 10) and the distance between the left panel 2PC and the left end of the front panel 2PA in the left-right direction correspond to the box 2 in the bottom-assembled state. It will be the same length as the distance.

When the injector plate 8 moves to the supply position, the box 2 is pushed upward, and one box 2 in a folded state is supplied to the box opening device 10. The box 2 is loaded on the box opening device 10 so that the left end thereof is a crease between the rear panel 2PE and the left rear panel 2PD, and the front panel 2PA is located in front of the rear panel 2PE.

The box 2 is opened by the box opening device 10 by being inserted from the lower side between the first engaging device main body 26 arranged in parallel and the second engaging device main body 36 and the third engaging device main body 46. Is supplied to. When the box 2 is supplied to the box opening device 10, the support device 12 is in a closed form. When the support device 12 is in the closed form, the first support member 18, the second support member 19, and the third support member 44 are the first engagement device 25, the second engagement device 35, and the third engagement device 45. Are arranged so that their relative arrangements are equal to the rear panel 2PE, the left panel 2PC, and the front panel 2PA of the flatly folded box 2, respectively. When the box 2 is supplied to the box opening device 10, the pin 27 provided in the first engaging device 25 pierces the upper end surface of the rear upper flap 2UC of the box 2 and is provided in the first engaging device 25. The pin 27 is coupled to the rear upper flap 2UC. Further, similarly to the first engaging device 25, the pin 27 provided in the second engaging device 35 is coupled to the upper left flap 2UB, and the pin 27 provided in the third engaging device 45 is connected to the front upper flap 2UA. Join. After the pin 27 is pierced by the upper flap 2U, the injector plate 8 descends from the supply position to the initial position, and the box 2 is attached to the first engaging device 25, the second engaging device 35, and the third engaging device 45. Engage and remain in the box opening device 10.

In the present embodiment, when the support device 12 is in the closed form, the distance (X in FIG. 9) between the crease and the point Q between the rear panel 2PE and the left rear panel 2PD and the rear panel 2PE and the left The difference between the crease with the rear panel 2PD and the point Q in the front-rear direction (Y in FIG. 9) is the distance in the left-right direction of the left panel 2PC with respect to the rear panel 2PE of the box 2 in the opened state (FIG. 9). At a position equal to Z) in 10, the box 2 engages the first engaging device 25, the second engaging device 35, and the third engaging device 45, and the first support member 18 and the second support member 19 , And is supported by the third support member 44.

When the box 2 is supplied to the box opening device 10, the support device 12 is displaced from the closed form to the open form. While the support device 12 is displaced from the closed form to the open form, the rear upper flap 2UC engages the first engaging device 25, the upper left flap 2UB engages the second engaging device 35, and the front upper flap 2UA It is engaged with the third engaging device 45. Since the crease between the body 2P and the upper flap 2U is hard to break, the rear panel 2PE directly connected to the rear upper flap 2UC moves together with the first engaging device 25 and is directly connected to the upper left flap 2UB. The left panel 2PC is moved together with the second engaging device 35, and the front panel 2PA directly connected to the front upper flap 2UA moves together with the third engaging device 45.

When the support device 12 is in the open form, the support device 12 is opened so that the angle formed by the first support member 18 and the second support member 19 is approximately 90 degrees. When the support device 12 is in the closed form, the difference between the lateral distance between the crease and the point Q between the rear panel 2PE and the left rear panel 2PD and the distance between the crease and the point Q in the front-rear direction is the opening of the box. Since the position is equal to the distance of the left panel 2PC in the left-right direction with respect to the rear panel 2PE of the box 2 in the state, the angle formed by the first support member 18 and the second support member 19 is as shown in FIG. By being opened so as to be approximately 90 degrees, the position of the second engaging device 35 with respect to the first engaging device 25 in the left-right direction is the left panel with respect to the rear panel 2PE of the box 2 in the opened state. It is equal to the relative position of the 2PC in the left-right direction. Since the left panel 2PC is connected to the rear panel 2PE by the left rear panel 2PD and the first engaging device 25 is fixed to the first support member 18, the left panel 2PC is pulled backward by the rear panel 2PE. Since the second engaging device 35 is slidably supported by the second supporting member 19 in the front-rear direction, which is the extending direction thereof, the second engaging device 35 is supported by the force from the rear panel 2PE applied to the left panel 2PC. Moves along the second support member 19, and the position of the second engaging device 35 relative to the first engaging device 25 in the front-rear direction is the left panel 2PC with respect to the rear panel 2PE of the box 2 in the opened state. Is equal to the relative position in the anteroposterior direction of. Therefore, when the support device 12 changes from the closed form to the open form, the relative position of the second engaging device 35 with respect to the first engaging device 25 is the left panel 2PC with respect to the rear panel 2PE of the box 2 in the opened state. Is equal to the relative position of. When the support device 12 is in the open form, the rear panel 2PE and the left panel 2PC form an angle of approximately 90 degrees with each other, and the left rear panel 2PD is arranged at an angle with respect to the rear panel 2PE and the left panel 2PC. To.

When the support device 12 is in the open form, the second support member 19 opens at an angle of approximately 90 degrees with respect to the first support member 18. Since the third engaging device main body 46 is connected to the distal end side of the second engaging device main body 36 via the connector 47, the third supporting member 44 is in front of the second supporting member 19 due to centrifugal force. Is pushed out to. When the third support member 44 is pushed forward, the third frame 43 moves forward. When the support device 12 is in the open form, the third support member 44 is arranged in front of the first support member 18 via a predetermined distance. Therefore, the third engaging device main body 46 is arranged substantially parallel to the first engaging device main body 26, and is approximately 90 degrees with respect to the second engaging device main body 36 in front of the second engaging device main body 36. It is arranged so as to form an angle of.

Further, the third engaging device main body 46 is connected to the distal end of the second engaging device main body 36 via a connector 47, and the third engaging device main body 46 is fixed to the third support member 44. Therefore, the third support member 44 also moves to the left as the second engaging device main body 36 moves. When the support device 12 is in the open form, the third support member 44 moves to the left along the third frame 43 until it comes into contact with the box opening stopper member 48. In the present embodiment, the distance between the left panel 2PC that engages with the second engaging device 35 and the left end of the front panel 2PA that engages with the third engaging device 45 in the left-right direction is the box body 2. The position of the box opening stopper member 48 is determined so as to be equal to the distance in the left-right direction of the left panel 2PC with respect to the rear panel 2PE. In the present embodiment, since the connection tool stopper member 47S regulates the rotation angle of the connection tool 47 with respect to the second engagement device main body 36, the movement of the third engagement device 45 to the right side is restricted. Therefore, when the support device 12 is in the open form, the relative position of the third engagement device 45 with respect to the first engagement device 25 in the left-right direction is the front of the box 2 in the opened state with respect to the rear panel 2PE. It is equal to the relative position of the panel 2PA in the left-right direction.

The position of the third engaging device 45 relative to the first engaging device 25 in the left-right direction is equal to the position of the front panel 2PA relative to the rear panel 2PE of the box 2 in the opened state in the left-right direction. ing. Therefore, the left end of the front panel 2PA is located on a straight line extending back and forth through the left end of the rear panel 2PE. On the other hand, the front panel 2PA is connected to the left front panel 2PB, and the left front panel 2PB is connected to the left panel 2PC. Therefore, the left end of the front panel 2PA is located on the circumference by the left panel 2PC with the front end of the left panel 2PC as the center and the width of the left front panel 2PB shown in FIG. 10 as a radius. Therefore, the left end of the front panel 2PA moves to the position of the intersection of the straight line and the circle (R in FIG. 10). Further, since the third engaging device main body 46 is displaced while having a surface facing rearward, the front panel 2PA is arranged substantially parallel to the rear panel 2PE. Therefore, the relative position of the third engaging device 45 with respect to the first engaging device 25 is equal to the relative position of the front panel 2PA with respect to the rear panel 2PE of the box 2 in the opened state. When the support device 12 is in the open form, the rear panel 2PE and the front panel 2PA are positioned parallel to each other, and the front panel 2PA is arranged so as to form an angle of approximately 90 degrees with respect to the left panel 2PC. At the same time, the left front panel 2PB is tilted with respect to the front panel 2PA and the left panel 2PC. When the support device 12 is in the open form, the first position is such that the distance between the rear panel 2PE and the front panel 2PA is smaller than the sum of the width of the left rear panel 2PD, the width of the left panel 2PC, and the width of the left front panel 2PB. The support member 18 and the third support member 44 are arranged.

A second box opening stopper member 99 is provided on the rail of the first frame 41, and the relative position of the third engaging device 45 in the front-rear direction with respect to the first engaging device 25 is after the box 2 in the boxed state. The forward movement of the third frame 43 may be restricted to be equal to the relative position of the front panel 2PA with respect to the panel 2PE.

Since the left rear panel 2PD is tilted with respect to the rear panel 2PE and the left panel 2PC, and the left front panel 2PB is tilted with respect to the front panel 2PA and the left panel 2PC, the box 2 is distorted and deformed, and the right panel 2PG and the right front panel are tilted. The crease between the 2PH and the crease between the right panel 2PG and the right rear panel 2PF is folded. By bending these folds, the body portion 2P is deformed into an octagonal tubular shape. Both the upper flap 2U and the lower flap 2L are arranged so as to extend upward and downward, respectively, according to the arrangement of the directly connected panels, and the box is opened.

When the box 2 is sent to the bending device 50, the support device 12 is displaced to the closed form, and the first support member 18, the second support member 19, and the third support member 44 are returned to the initial positions. When the box 2 is sent to the bending device 50, the box 2 and the second engaging device 35 are disengaged, so that the opening urging device 38 causes the second engaging device 35 to be second supported. It is returned to the initial position with respect to the member 19, and the box opening device 10 returns to the initial state.

A rail is provided on the second support member 19, and a slider that is swingably coupled to the rail is provided on the second engaging device main body 36. However, the rail and the slider may be provided in any manner so as to slide. You may.

(Bending device)
As shown in FIG. 1, the box making machine 1 has an inner flap 2LI composed of a front lower flap 2LA and a rear lower flap 2LC of the box body 2 deformed into a tubular state below the box opening device 10. It is provided with a folding device 50 that bends the outer flap 2LO including the lower left flap 2LB and the lower right flap 2LD inward after bending inward. The crease between the body portion 2P and the outer flap 2LO is set so that the peaks and valleys of the corrugation of the core 2M are largely crushed and easily bent from the crease between the body portion 2P and the inner flap 2LI.

As shown in FIGS. 1 and 12, the folding device 50 includes an inner flap folding device 51 provided in pairs below the box opening device 10. The inner flap folding device 51 includes a pair of front and rear inner flap folding plates 52 and a fourth actuator 53 that displaces the inner flap folding plate 52. The surface of the inner flap folding plate 52 can be tilted between a state of substantially upward and a state of tilting inward in the front-rear direction and inward in the front-rear direction, and the box body 2 is lowered from the box-opening device 10 and sent out. At that time, the inner flap folding plate 52 is set to face inward in the front-rear direction. The lower end of the inner flap 2LI of the box 2 abuts on the upper surface of the inner flap folding plate 52, the crease between the inner flap 2LI and the body 2P is bent inward to the left and right, and the inner flap 2LI is the inner flap. It is arranged along the inclination of the folding plate 52. When the box 2 is lowered to a predetermined position, the inner flap folding plate 52 is in a state of being substantially upward by the fourth actuator 53, and the inner flap 2LI is at an angle of approximately 90 degrees with respect to the body 2P. Can be folded. When the inner flap 2LI and the outer flap 2LO are bent and the box 2 is sent out from the folding device 50, the fourth actuator 53 uses the inner flap so that the surface of the inner flap folding plate 52 faces inward in the front-rear direction. The folding plate 52 is tilted.

As shown in FIG. 12, the outer flap folding device 54 is located below the inner flap folding plate 52 and includes a pair of left and right outer flap folding plates 55A extending in the front-rear direction. Each of the outer flap folding plates 55A comes into contact with the outer flap of the box 2 from the left and right inward when the box 2 descends from the box opening device 10. The outer flap folding device 54 is further below the outer flap folding plate 55A, and includes a pair of left and right outer flap folding members 55B extending forward and backward on the left and right outer sides. Each of the outer flap folding members 55B has a surface facing inward on the left and right sides, so that when the box body descends from the box opening device 10, it abuts on the outer flap 2 LO of the box body 2 from the left and right outside. It is configured. The outer flap folding plate 55A is coupled to the outer flap folding plate base 55C at the rear end. The outer flap folding member 55B is coupled to the tip of the fifth actuator 56 supported by the outer flap folding plate base 55C. The fifth actuator 56 is configured so that the outer flap folding member 55B can appear and disappear toward the outer flap folding plate 55A. The fifth actuator 56 pushes the outer flap folding member 55B toward the outer flap folding plate 55A, so that the outer flap folding member 55B comes into contact with the outer flap 2LO from the outside, and the outer flap folding plate 55A is brought into contact with the outer flap folding plate 55A. The outer flap 2LO can be sandwiched between the outer flap folding plate 55A and the outer flap folding member 55B by abutting from the inside of the 2LO. The outer flap folding device 54 further includes a sixth actuator 57 that rotates the outer flap folding plate base 55C about the front-rear direction as an axis.

As shown in FIG. 12A, when the box 2 is lowered and the outer flap folding member 55B is pushed toward the outer flap folding plate 55A, the outer flap folding plate 55A and the outer flap folding member 55A are pushed out. The outer flap 2LO is sandwiched between 55B and 55B. As shown in FIG. 12B, the sixth actuator 57 operates while the outer flap is sandwiched between the outer flap folding plate 55A and the outer flap folding member 55B, and the outer flap folding plate base 55C. Rotates inward to the left and right so that the crease between the outer flap 2LO and the body 2P becomes a crease (for example, the angle between the body 2P and the outer flap 2LO is approximately 10 to 80 degrees. The outer flap 2LO is bent inward to the left and right. Since the outer flap 2LO is bent inward to the left and right, and the outer flap 2LO is sandwiched between the outer flap folding plate 55A and the outer flap folding member 55B, the upward movement of the box 2 is restricted. There is. When the support device 12 is raised by the first actuator 13 while the outer flap 2LO is bent inward to the left and right, the upper flap 2U and the first engaging device 25, the second engaging device 35, and the third engaging device are raised. The engagement with 45 is released. After that, as shown in FIG. 12B, when the fifth actuator 56 moves the outer flap bending member 55B to the left and right outward, the box 2 can be moved in the front-rear direction.

As shown in FIG. 1, the bending device 50 includes an extrusion device 58 that sends out a box 2 in which the lower flap 2L is bent. The extrusion device 58 includes an extrusion plate 59 that can be moved back and forth, and the extrusion plate 59 extrudes the rear panel 2PE of the box 2 in which the inner flap 2LI and the outer flap 2LO are bent, so that the box 2 is a molding device. It is sent to 61.

In order to guide the movement of the box 2 at the time of delivery, the bending device 50 further includes guide rollers 60 provided in pairs on the left and right sides. The guide roller 60 has a plurality of rollers provided in a row in the front-rear direction. Each roller is rotatably provided with the vertical direction as the axis. The guide rollers 60 can appear and disappear inward on the left and right, and when they project inward on the left and right, each roller comes into contact with the left and right panels 2PC and 2PG of the box 2. In the present embodiment, the guide roller 60 projects inward to the left and right so that the box 2 does not protrude when the outer flap folding device 54 bends the outer flap 2LO, and comes into contact with the left and right panels 2PC and 2PG to form the box 2. Supports the body 2P of. When the box 2 is extruded by the extrusion device 58, the guide roller 60 is maintained in a protruding state, so that the box 2 is prevented from shifting to the left or right.

When the delivery of the box 2 is completed, the inner flap 2LI and the outer flap 2LO are bent, and when the box 2 is sent from the folding device 50, the surface of the inner flap folding plate 52 of the fourth actuator 53 is moved back and forth. The inner flap folding plate 52 is tilted so as to face inward. After the box 2 is sent out, the outer flap folding plate base 55C rotates and returns to the position when the box 2 was lowered from the box opening device 10. The extrusion plate 59 retracts and returns to the position when the box 2 was lowered.

In order to prevent the box body 2 from collapsing after box making, an adhesive is applied to the front side of the outer flap folding device 54 on the left and right inward surfaces of the outer flap 2LO or the surface in contact with the outer flap 2LO of the inner flap 2LI. An adhesive coating device for coating may be provided. At that time, in order to sufficiently bond the inner flap 2LI and the outer flap 2LO, it is preferable to bring the inner flap 2LI into contact with the outer flap 2LO by utilizing the restoring force of the bent inner flap 2LI.

(Molding equipment)
As shown in FIG. 1, the box making machine 1 includes a molding device 61 for more accurately molding the body portion 2P of the box body 2. The box 2 extruded by the extruder 58 is carried to a molding position that serves as a reference for molding, the left and right panels 2PC and 2PG are expanded outward on the left and right, and the left and right panels 2PC and 2PG are pressed against the mold. , Box 2 is molded.

As shown in FIG. 1, the molding device 61 is arranged on the front side of the bending device 50 and includes a guide roller 60 for carrying the box 2 extruded by the extrusion device 58 forward. When the guide rollers 60 project inward to the left and right, each roller comes into contact with the left panel 2PC or the right panel 2PG of the box 2 and moves the box 2 forward. The box 2 carried forward is locked by the front stopper member 62 provided in the front and becomes a molding position. The front stopper member 62 is formed so as to be retractable so that the position of the box 2 is the molding position, and when the box 2 is carried to the molding device 61, it abuts against the front panel 2PA of the box 2 and hits the box 2. 2 Regulate the forward movement. When the molding of the box 2 is completed, the front stopper member 62 is sunk and the box 2 can be moved forward.

As shown in FIGS. 13 and 14, the molding apparatus 61 includes a mold member 63. The mold members 63 are formed in pairs symmetrically with respect to the center line. The mold member 63 is formed on a surface orthogonal to the left-right direction, and includes two base surfaces 64 which are oriented inward to the left and right and are provided apart from each other in the front-rear direction. The two base surfaces 64 are the length of the box 2 in the quadrangular box state (for example, in the octagonal box 2, the width when the right front panel 2PH, the right panel 2PG, and the right rear panel 2PF are connected in a plane). When molding is performed, the box 2 is sandwiched by four base surfaces 64 in total on the left, right, front and back. The mold member 63 further has recesses 65 recessed outward on the left and right sides with respect to the base surface 64. The recess 65 is formed on a surface orthogonal to the left-right direction, and has a bottom surface 66 facing inward left and right, a side wall surface 67 extending forward from the front end of the bottom surface 66 and inward left and right and facing rearward, and a side wall surface 67 thereof. It has a side wall surface 67 that extends rearward from the rear end of the bottom surface 66, is inward left and right, and faces forward. The two side wall surfaces 67 are inclined so that the front-rear width of the recess 65 increases from the bottom surface 66 toward the base surface 64. The width of the recess 65 in the front-rear direction is formed to be the same as the width of the right panel 2PG in the front-rear direction. The vertical width of the mold member 63 is formed to be shorter than the height of the box 2. Each of the mold members 63 is connected to a mold member actuator 63A that expands and contracts inward to the left and right, so that the mold member 63 is configured to be able to appear and disappear inward to the left and right.

The molding device 61 further includes a pair of left and right body expansion devices 68 for adsorbing and expanding on the outer surfaces of the left and right panels 2PC and 2PG. The left and right body expansion devices 68 each include a decompression suction device 69. The body expansion device 68 can be displaced in the left-right direction, and when the body expansion device 68 is located inward, the decompression suction device 69 sucks the body 2P of the box 2. The decompression suction device 69 is connected to a suction device actuator 68A that expands and contracts inward to the left and right, respectively. Therefore, the decompression suction device 69 is configured to appear and disappear inward to the left and right. In the present embodiment, two vacuum suction devices 69 are provided side by side at the same height in the front-rear direction. The mold member 63 and the body portion expanding device 68 are arranged on the left and right sides of the box 2 at the molding position, and the body portion expanding device 68, the guide roller 60, and the mold member 63 are arranged in this order from the top.

The molding device 61 includes a push-up device 70 provided below the box 2 at the molding position. The push-up device 70 has a surface facing upward above the surface, a projecting piece continuous to the rear end of the surface and extending to the left and right, and a push-up plate portion 71 provided so as to be vertically displaceable, and expands and contracts vertically. The push-up plate portion actuator 71A for moving the push-up plate portion up and down is provided.

As shown in FIG. 1, in the present embodiment, the molding apparatus 61 further includes an upper stopper member 72. The upper stopper member 72 is a plate-shaped member having a surface facing up and down, and is provided at a height that abuts on the upper flap 2U of the box 2 at the molding position.

As shown in FIG. 13, the box 2 in the opened state sent out from the folding device 50 is sent forward from the folding device 50 along the center line by the extruder 58. The box 2 advances forward along the guide roller 60 and is locked to the molding position by the front stopper member 62. When the box 2 is in the molding position, the guide roller 60 retracts outward to the left and right, and the mold member actuator 63A operates in a timely manner to project the left and right mold members 63 inward to the left and right. As a result, the left mold member 63 abuts on the front lower end of the left front panel 2PB on the front base surface 64, and abuts on the rear lower end of the left rear panel 2PD on the rear base surface 64. The right mold member 63 abuts on the right front panel 2PH on the front base surface 64 and abuts on the right rear panel 2PF on the rear side base surface 64. Next, when the suction device actuator 68A is activated, the two left and right decompression suction devices 69 project inward to the left and right, and are sucked to the corresponding left panel 2PC and right panel 2PG, respectively.

As shown in FIGS. 13 and 14, the left and right decompression adsorption devices 69 are adsorbed on the left panel 2PC and the right panel 2PG, respectively, and then the decompression adsorption device 69 moves outward to the left and right while being adsorbed on the panel. While the base surface 64 of the left mold member 63 is in contact with the left front panel 2PB and the left rear panel 2PD, the decompression suction device 69 moves to the left outer and the left panel 2PC is pulled to the left outer, so that the left front panel The crease between the 2PB and the left panel 2PC is bent so as to protrude to the left front, and the crease between the left panel 2PC and the left rear panel 2PD is bent so as to protrude to the left rear. While the base surface 64 of the right mold member 63 is in contact with the right front panel 2PH and the right rear panel 2PF, the body expansion device 68 moves outward to the right, and the right panel 2PG is pulled outward to the right. The crease between the panel 2PH and the right panel 2PG is bent so as to project forward to the right, and the crease between the right panel 2PG and the right rear panel 2PF is bent so as to project rearward to the right. The vacuum suction device 69 moves outward to the left and right until the left panel 2PC comes into surface contact with the bottom of the left mold member 63 and the right panel 2PG comes into surface contact with the bottom of the right mold member 63. As a result, the left front panel 2PB and the left rear panel 2PD come into surface contact with the side wall surface 67, and the creases provided in the front and rear of the left panel 2PC are along the bent portion between the bottom portion of the mold member 63 and the side wall surface 67. Can be folded into. Further, the right front panel 2PH and the right rear panel 2PF are in surface contact with the side wall surface 67, and the creases provided before and after the right panel 2PG are bent along the bent portion between the bottom portion of the mold member 63 and the side wall surface 67. Be done.

When the decompression suction device 69 moves outward to the left and right and the body 2P of the box 2 is in contact with the mold member 63, push up until the outer flap 2LO is bent at approximately 90 degrees with respect to the body 2P. The plate actuator 71A moves the push-up plate 71 from below to above the box 2. Further, when the outer flaps 2LO are bent inward and the lower ends of the left and right outer flaps 2LO come into contact with each other, the left panel 2PC and the right panel 2PG of the body 2P are pushed outward to the left and right, and the body The width of the part 2P is widened. In the present embodiment, since the upper stopper member 72 is provided, when the box body 2 is pushed up by the push-up plate portion 71, the box body 2 moves upward and does not protrude.

When the body 2P is formed and the outer flap 2LO is bent, the guide roller 60 moves inward to the left and right, and the body 2P of the body expansion device 68 is released from suction to the left panel 2PC and the right panel 2PG. The body expansion device 68 is retracted to the left and right by the suction device actuator 68A. Further, the mold member 63 is also retracted to the left and right outward by the mold member actuator 63A, and the front stopper member 62 is retracted downward. Next, the push-up plate portion 71 moves forward, the rear panel 2PE of the box body 2 is pushed out by a projecting piece provided at the rear end of the push-up plate portion 71, and the box body 2 moves forward and is sent out. When the suction of the body expansion device 68 is released, the lower ends of the left and right outer flaps 2LO come into contact with each other, so that the body 2P of the box 2 does not contract in the left-right direction and is maintained in an octagonal tubular shape. To.

(Taping equipment and orthodontic equipment)
As shown in FIG. 1, the box making machine 1 conveys the box 2 sent out from the molding apparatus 61 forward, attaches tape to the lower flap 2L of the box 2, and puts the box 2 in the bottom-assembled state. A taping device 81 that deforms is provided.

The taping device 81 is arranged on the front side of the folding device 50, and the lower flap 2L is bent by the folding device 50, and the box 2 on which the body 2P is molded by the molding device 61 is conveyed forward. 82 is provided. The conveyor 82 has a frame 83 and a pair of left and right side conveyors 85 provided on both sides of the center line and extending in the front-rear direction. The side conveyor 85 is a known belt conveyor, and includes a belt wound around a roller that is rotated around the vertical axis by a motor, and the belt abuts on the body 2P of the box 2 to convey the box 2 forward. .. On the upper side of the side conveyor 85, a mounting surface 86, which is an upward surface, is provided.

The taping device 81 further attaches the adhesive tape T along the center line to the lower part of the front panel 2PA, the lower flap 2L, and the lower part of the rear panel 2PE of the box 2 passing above the taping device 81 from the rear to the front. It has a unit 87. The taping unit 87 is arranged between the left and right side conveyors 85. The taping unit 87 cuts the adhesive tape T by a cutter when the box 2 passes a predetermined position.

As shown in FIG. 15, in the box making machine 1, when the taping device 81 further attaches the tape to the lower flap 2L of the box 2, the body 2P of the box 2 conveyed by the transfer device 82 A straightening device 91 that comes into contact with the side end surface and corrects the body 2P of the box 2 is provided. The straightening device 91 is arranged on the mounting surfaces 86 of the pair of left and right side conveyors 85. As shown in FIGS. 15 and 16, the straightening device 91 includes a straightening support 92 provided on the mounting surface 86, a slide member 93 provided on the straightening support 92, and a slide member 93. It has a straightening device support column 94 provided on the upper surface of the machine, an arm member 95 extending inward to the left and right, and a straightening urging device 97 connected to the arm member 95 and the slide member 93. The slide member 93 is formed so as to be slidable toward the left and right inward with respect to the straightening support base 92. The straightening device support column 94 is provided so as to project upward from the upper surface of the slide member 93. The base end of the arm member 95 is rotatably supported by the straightening device support column 94, the tip extends inward to the left and right, and the tip is provided with a roller 96 rotatably supported with the vertical axis as the axis. One end of the straightening urging device 97 is coupled to the left and right outer positions of the straightening device support column 94 of the arm member 95, and the other end is coupled to the slide member 93.

When the arm member 95 is not pressed along the path direction of the box 2, the arm member 95 is in the most protruding position in the left and right inward toward the moving path of the box 2. When the arm member 95 is pressed along the path direction of the box 2, the arm member 95 rotates around the straightening device support column 94 as an axis against the urging force of the straightening device 97, and the rollers 96 rotate from the left and right inside. It is the evacuation position that has moved to the left and right. When the pressure applied to the arm member 95 is released, the straightening urging device 97 returns the arm member 95 from the retracted position to the protruding position.

The straightening device 91 is adjusted so that the left and right rollers 96 are located on the front side of the taping unit 87. Further, at the protruding position, the left and right rollers 96 are in contact with the left front panel 2PB and the right front panel 2PH of the box body 2, respectively, and at the retracted position, the slide member 93 is in a position that does not hinder the forward movement of the box body 2. The amount of protrusion to the left and right inward is adjusted. Further, the left and right straightening devices 91 are configured symmetrically with respect to the path direction of the box 2, and the left and right straightening devices 91 are configured to have the same amount of protrusion to the left and right inward.

When the box 2 is conveyed forward from the rear end of the side conveyor 85, the straightening device 91 comes into contact with the left front panel 2PB and the right front panel 2PH of the box 2, respectively. As the box 2 moves forward, the straightening device 91 presses the left front panel 2PB and the right front panel 2PH backward. When the front part of the box 2 including the left front panel 2PB, the front panel 2PA, and the right front panel 2PH is distorted so as to protrude greatly to the left and right, the straightening device 91 located in the protruding direction is the other straightening device 91. Rather, the front part of the box 2 is pressed strongly. Therefore, the distortion in the protruding direction is suppressed, and the front portion of the box 2 is corrected so as to be symmetrical.

After the straightening device 91 straightens the front part of the box 2, when the box 2 is conveyed forward, the straightening device 91 comes into contact with the left panel 2PC and the right panel 2PG. Further, when the box 2 is conveyed forward, the left and right straightening devices 91 come into contact with the left rear panel 2PD and the right rear panel 2PF, respectively. The left and right straightening devices 91 abut on the left rear panel 2PD and the right rear panel 2PF, respectively, and the rear portion of the box 2 including the left rear panel 2PD, the rear panel 2PE, and the right rear panel 2PF protrudes greatly to the left and right. Even when it is distorted as described above, the shape of the rear portion of the box 2 is corrected as symmetrically as possible by the straightening device 91 as in the case of the front portion of the box 2. When the straightening device 91 abuts on the left rear panel 2PD and the right rear panel 2PF, the rear portion of the box 2 is pressed from the left and right, so that the rear portion of the box 2 is corrected so as to be symmetrical.

After the front part of the box 2 is straightened by the straightening device 91, the adhesive tape T is applied to the lower part of the front panel 2PA, the butt portion of the lower left flap 2LB and the lower right flap 2LD, and the rear panel by the taping unit 87. It is continuously attached to the lower part of 2PE in the front and back. The correction of the rear portion of the box 2 by the straightening device 91 is performed while the adhesive tape T is attached to the abutting portion of the lower left flap 2LB and the lower right flap 2LD. When the cut adhesive tape T is attached to the lower part of the rear panel 2PE, the box 2 is in the bottom-assembled state and is sent forward by the side conveyor 85.

An actuator is provided in the straightening device 91, and the straightening device 91 abuts on the box 2 immediately before the taping starts, continues to abut on the box 2 during the taping, and after the taping is completed, the straightening device 91 May be configured to be separated from the box 2.

In the present embodiment, the fourth actuator 53, the fifth actuator 56, the sixth actuator 57, the mold member actuator 63A, and the suction device actuator 68A are all actuators by an air cylinder and operate by expansion and contraction, but the air cylinder Is not limited, and may be performed by another method (linear motor or the like).

The effect of the box making machine 1 configured as described above will be described. As shown in FIG. 10, the box-opening device 10 provided in the box-making machine 1 sets the relative positions of the rear panel 2PE, the left panel 2PC, and the front panel 2PA of the box body 2 in the box-opened state. Since the rear panel 2PE, the left panel 2PC, and the front panel 2PA of the body 2 are moved so as to be relative to each other, the box 2 can be molded more accurately than when the two panels are moved. Is.

Further, the rear panel 2PE, the left panel 2PC, and the front panel 2PA of the box 2 are relative to each other without providing an actuator in each of the first engaging device 25, the second engaging device 35, and the third engaging device 45. Can be moved so as to be relative to the rear panel 2PE, the left panel 2PC, and the front panel 2PA of the box 2 in the opened state, which simplifies the configuration of the box opening device 10. It is possible.

By changing the position of the left end (X in FIG. 9) of the flatly folded box 2 when supplied to the box opening device 10 and the position of the box opening stopper member 48, the left panel 2PC and the rear panel It is possible to open the box in a box opening state in which the distance from the left end of the 2PE in the left-right direction (Z in FIG. 10) and the distance between the left panel 2PC and the left end of the front panel 2PA in the left-right direction are different. is there. About the position of the left end of the flatly folded box 2 (X in FIG. 9) when supplied to the box opening device 10 and the front-back direction of the crease and the point Q between the rear panel 2PE and the left rear panel 2PD. By equalizing the distance (Y in FIG. 9) and changing the position with the box opening stopper member 48, the box opening device 10 opens the box so that the body 2P of the box 2 has a square tubular shape. It is also possible to do.

Further, since the box making machine 1 molds from the outside of the box 2, the inside of the box 2 can be maintained in an open state upward. Therefore, it is easy to store the article. Further, since the molding device 61 is not inserted inside the body 2P, a drive mechanism for inserting and removing the molding device 61 is not required, and the box making machine 1 can be simplified and downsized.

<< Second Embodiment >>
The box making machine 200 according to the second embodiment has a configuration different from that of the first embodiment only in the box opening device 201. As shown in FIGS. 17 and 18, the box opening device 201 is not provided with the second engaging device 35, and the second support member 19 and the third engaging device main body 46 are connected by a connector 47. It has the same configuration as the box opening device 10 except that the second box opening stopper member 99 is always provided. The second box opening stopper member 99 is provided on the rail of the first frame 41 and restricts the forward movement of the third frame 43. As shown in FIG. 17, when the support device 12 is in the closed form, the relative position of the third engagement device 45 with respect to the first engagement device 25 is the rear panel of the flatly folded box 2. The first support member 18 and the third support member 44 are arranged so as to be equal to the relative positions of the front panel 2PA of the flatly folded box 2 with respect to the 2PE.

As shown in FIG. 18, when the support device 12 is displaced from the closed form to the open form, the second support member 19 and the third engagement device main body 46 are connected by the connector 47, so that the third engagement device 12 is engaged. The coupling device main body 46 is pushed forward from the second support member 19. When the third engaging device main body 46 is pushed forward, the third frame 43 moves forward and comes into contact with the second box opening stopper member 99. At the same time, the third engaging device 45 moves to the left along the rail provided on the third frame 43, and the third support member 44 comes into contact with the box opening stopper member 48. The support device 12 is in the open form by adjusting the fixed position of the box opening stopper member 48 on the rail of the third frame 43 and the fixed position of the second box opening stopper member 99 on the rail of the first frame 41. When, the relative position of the third engaging device 45 with respect to the first engaging device 25 is opened in an octagonal tubular shape with respect to the rear panel 2PE of the box 2 in the opened state. The first support member 18 and the third support member 44 are arranged so as to be equal to the relative positions of the front panel 2PA of the box body 2 in the opened box state.

As shown in FIG. 18, when the support device 12 is in the open form, the rear panel 2PE supported by the first engaging device 25 and the front panel 2PA supported by the third engaging device 45 are arranged in parallel. The distance between the rear panel 2PE supported by the first engaging device 25 and the front panel 2PA supported by the third engaging device 45 is larger than the sum of the widths of the left rear panel 2PD, the left panel 2PC, and the left front panel 2PB. It is arranged so as to be small and larger than the width of the left panel 2PC. Since the distance between the rear panel supported by the first engaging device 25 and the front panel 2PA supported by the third engaging device 45 is set, the crease between the left rear panel 2PD and the left panel 2PC The crease between the left panel 2PC and the left front panel 2PB is broken, and the left panel 2PC projects to the left. Since the left panel 2PC projects to the left, the left rear panel 2PD is arranged to be inclined with respect to the rear panel 2PE, and the left front panel 2PB is arranged to be inclined with respect to the front panel 2PA. Like the left rear panel 2PD, the right rear panel 2PF is also arranged at an angle with respect to the rear panel 2PE, and like the left front panel 2PB, the right front panel 2PH is also arranged at an angle with respect to the front panel 2PA. The body portion 2P of 2 is formed in an octagonal tubular shape.

The effect of the box making machine 200 configured as described above will be described. As shown in FIGS. 17 and 18, the box opening device 201 provided in the box making machine 200 can have a simpler configuration than the box opening device 201 according to the first embodiment.

<< Third Embodiment >>
The box making machine 300 according to the third embodiment has a configuration different from that of the first embodiment only in the box opening device 301. As shown in FIGS. 19, 20, and 21, the box-opening device 301 has the same configuration as the box-opening device 10 according to the first embodiment, but the first engaging device 25 is the first. The support member 18 is displaceably supported in the extending direction, a second actuator 28 is provided between the first engaging device 25 and the first support member 18, and the third support member 44 extends in the left-right direction. The third support member 44 is provided and connected to the second engagement device main body 36 via the connector 47, and the third engagement device 45 is displaceably supported in the extending direction of the third support member 44. The difference is that the seventh actuator 49 is provided between the third support member 44 and the third engagement device 45. The third support member 44 is coupled to a slider that is slidably coupled to the rail of the third frame 43 on its back surface. In the box opening device 301, the box opening stopper member 48 is not provided on the rail of the third frame 43, and the second engaging device main body 36 has a rotation angle of the connector 47 with respect to the second engaging device main body 36. The connector stopper member 47S that regulates the above is provided.

As shown in FIGS. 19 and 20, the second actuator 28 displaces the first engaging device 25 with respect to the first support member 18 in the extending direction thereof. In the present embodiment, the second actuator 28 is a telescopic air cylinder provided in the extending direction of the first engaging device 25, and expands and contracts in the extending direction of the first support member 18. One end of the second actuator 28 is coupled to the first support member 18, and the other end of the second actuator 28 is coupled to the end of the first engaging device 25.

As shown in FIGS. 19 and 20, the seventh actuator 49 displaces the third engaging device 45 with respect to the third support member 44 in the extending direction thereof. In the present embodiment, the seventh actuator 49 is a telescopic air cylinder provided in the extending direction of the third engaging device 45, and expands and contracts in the extending direction of the third support member 44. One end of the seventh actuator 49 is coupled to the third support member 44, and the other end of the seventh actuator 49 is coupled to the end of the third engaging device 45.

Next, the operation of the box opening device 301 will be described. As shown in FIG. 19, as in the first embodiment, when the support device 12 is in the closed form, the relative of the third engaging device 45 to the first engaging device 25, as in the first embodiment. Position is equal to the relative position of the front panel 2PA of the flatly folded box 2 with respect to the rear panel 2PE of the flatly folded box 2, and the second with respect to the first engaging device 25. The first support so that the relative position of the engaging device 35 is equal to the relative position of the left panel 2PC of the flatly folded box 2 with respect to the rear panel 2PE of the flatly folded box 2. A member 18, a second support member 19, and a third support member 44 are arranged.

As shown in FIG. 20, when the support device 12 changes from the closed form to the open form, the second support member 19 is opened so as to form an angle of approximately 90 degrees with respect to the first support member 18. Further, the second actuator 28 moves the first engaging device 25 in the extending direction of the first support member 18, so that the position of the first engaging device 25 relative to the second engaging device 35 in the left-right direction. Is equal to the position of the rear panel 2PE in the left-right direction with respect to the left panel 2PC of the box 2 in the opened state. Since the left panel 2PC is connected to the rear panel 2PE by the left rear panel 2PD, the second engaging device 35 moves along the second support member 19, and the second engaging device 35 with respect to the first engaging device 25. The relative position of the left panel 2PC in the front-rear direction is equal to the relative position of the left panel 2PC with respect to the rear panel 2PE of the box 2 in the opened state. Therefore, when the support device 12 is in the open form, the relative position of the second engaging device 35 with respect to the first engaging device 25 is the relative position of the left panel 2PC with respect to the rear panel 2PE of the box 2 in the opened state. The first support member 18 and the second support member 19 are arranged so as to be equal to the respective positions.

When the support device 12 changes from the closed form to the open form, the third support member 44 is pushed forward of the second support member 19 and moves to the left along the rail of the third frame 43, as in the first embodiment. To do. When the support device 12 changes from the closed form to the open form, the connector stopper member 47S restricts the movement of the third support member 44 to the left beyond a predetermined position. When the support device 12 changes from the closed form to the open form, the position of the third support member 44 in the left-right direction is determined by the connector stopper member 47S, and the seventh actuator 49 sets the third engagement device 45 to the third support member 44. By moving the third engaging device 45 in the extending direction, the relative position of the third engaging device 45 with respect to the second engaging device 35 in the left-right direction is changed to the left and right of the front panel 2PA with respect to the left panel 2PC of the box 2 in the opened state. Equal to the relative position in the direction. The front panel 2PA is connected to the left panel 2PC via the left front panel 2PB, and the third frame 43 is movably supported by the first frame 41 and the second frame 42. Therefore, when the support device 12 is in the open form, the relative position of the third engagement device 45 with respect to the second engagement device 35 in the front-rear direction is the front panel 2PA with respect to the left panel 2PC of the box 2 in the opened state. The third frame 43 moves backward so as to be equal to the relative position in the front-rear direction of. Therefore, when the support device 12 is in the open form, the relative position of the third engaging device 45 with respect to the second engaging device 35 is the relative position of the front panel 2PA with respect to the left panel 2PC of the box 2 in the opened state. The second support member 19 and the third support member 44 are arranged so as to be equal to each other.

When the support device 12 is in the open form, the relative position of the second engaging device 35 with respect to the first engaging device 25 is the relative position of the left panel 2PC with respect to the rear panel 2PE of the box 2 in the opened state. Equal and the relative position of the third engaging device 45 with respect to the second engaging device 35 is equal to the relative position of the front panel 2PA with respect to the left panel 2PC of the box 2 in the opened state. The first support member 18, the second support member 19, and the third support member 44 are arranged. Due to the arrangement of the first support member 18, the second support member 19, and the third support member 44, the left rear panel 2PD is arranged so as to be inclined with respect to the rear panel 2PE and the left panel 2PC, and the left front panel 2PB is arranged with respect to the front panel 2PA. And left panel 2PC is arranged at an angle. Therefore, as in the first embodiment, when the support device 12 is in the open form, the box 2 is deformed into an open state having an octagonal tubular body portion 2P.

The displacement of the support device 12, the drive of the second actuator 28, and the drive of the seventh actuator 49 may be performed at the same time, or may be performed separately. In the present embodiment, the second actuator 28 and the seventh actuator 49 are both actuators that expand and contract by an air cylinder, but are not limited to the air cylinder and expand and contract by another method (linear motor or the like). You may.

Next, the effect of the box making machine 300 provided with the box opening device 301 will be described. As shown in FIG. 21, the box making machine 300 not only opens the octagonal box 2 into an octagonal tubular shape in the opened state, but also opens the octagonal box 2 into a square tubular shape. Is also possible. When opening the octagonal box 2 in a quadrangular tubular shape, the distance in the left-right direction from the point P to the left end of the box 2 is the front-back direction between the crease between the rear panel 2PE and the left rear panel 2PD and the point Q. The folded box 2 is arranged so as to be equal to the distance of. When the support device 12 is displaced from the closed form to the open form, the second actuator 28 maintains the first engaging device 25 in the initial position, and the seventh actuator 49 maintains the third engaging device 45 in the initial position. Good. At this time, the left panel 2PC is arranged so as to form an angle of 90 degrees with respect to the front panel 2PA, the rear panel 2PE is arranged so as to form an angle of 90 degrees with respect to the left panel 2PC, and the rear panel 2PE is arranged. Since the left end and the left panel 2PC are arranged side by side in the front-rear direction, the crease between the front panel 2PA and the right front panel 2PH and the crease between the rear panel 2PE and the right rear panel 2PF are bent, and the body portion. 2P is transformed into a square cylinder having a substantially rectangular shape. After opening the octagonal box 2 into a square cylinder, the second actuator 28 moves the first engaging device 25 to the right side, and the seventh actuator 49 moves the third engaging device 45 to the right side. , The second engaging device 35 and the third engaging device 45 slide rearward, so that the body portion 2P is opened in an octagonal tubular shape.

It is also possible to open the quadrangular box 3 in an opened state having a quadrangular tubular body portion 3P. When the quadrangular box 3 is opened in the opened state, the second actuator 28 maintains the first engaging device 25 in the initial position in the same manner as when the octagonal box 2 is opened in the quadrangular tubular shape. Then, the seventh actuator 49 may maintain the third engaging device 45 in the initial position. At this time, the left panel 3PC is arranged so as to form an angle of 90 degrees with respect to the front panel 3PA, and the rear panel 3PE is arranged so as to form an angle of 90 degrees with respect to the left panel 3PC. 3P is transformed into a square cylinder having a substantially rectangular shape.

When the quadrangular box 3 is opened in the quadrangular tubular state by the box opening device 301, the molding device 61 may be omitted for box making. When the quadrangular box 3 is opened in a quadrangular tubular state by using the molding device 61, the body extension device 68 is maintained in a position retracted to the left and right outward, and the base surface 64 of the mold member 63 is the body. The quadrilateral box 3 is formed by abutting on the four corners of 2P or 3P. When the outer flap 2LO is folded, the quadrangular box 3 is supported by the mold member 63, so that the quadrangular box 3 does not protrude upward and is supported by the mold member 63.

By changing the length when the second actuator 28 and the seventh actuator 49 are driven, the angle formed by the left panel 2PC and the left rear panel 2PD and the angle formed by the left panel 2PC and the left front panel 2PB change. It is also possible to open the box 2 in which the angle formed by the panel 2PC and the left rear panel 2PD and the angle formed by the left panel 2PC and the left front panel 2PB are different.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. The box making machine 1 according to the present embodiment does not have a configuration for accommodating articles in the boxes 2 and 3, but after the lower flap 2L is sealed, the articles are accommodated in the boxes 2 and 3 and the upper part is accommodated. It may have a structure for sealing the flap 2U. In addition, each configuration of the above embodiment is not an essential configuration, and can be appropriately selected.

In the second embodiment, the first support member 18 supports the rear panel 2PE, the third engagement device 45 supports the front panel 2PA, and the support device 12 supports the first engagement device 25 and the third engagement device. The relative arrangement with the 45 was arranged so as to be the relative arrangement between the rear panel 2PE and the front panel 2PA of the box 2 in the opened box state, but the panel supported by the first support member 18 The combination of panels supported by the third support member 44 is not limited to the combination of the front panel 2PA and the rear panel 2PE. The panel supported by the first support member 18 and the panel supported by the third engaging device 45 may be connected via at least one panel. The support device 12 sets the relative arrangement of the panel supported by the first support member 18 and the panel supported by the third engagement device 45 as the relative arrangement of the corresponding panels of the box 2 in the opened state. As described above, if the first support member 18 and the third engaging device 45 are arranged, the box 2 is deformed into the opened state.

In the above embodiment, the first engaging device 25, the second engaging device 35, and the third engaging device 45 are all engaged with the upper flap 2U by the pins 27 provided therein being pierced by the upper flap 2U. However, the means of engaging the engaging devices 25, 35, 45 with the box 2 is not limited to the pin 27. In the first embodiment and the third embodiment, the first engaging device 25 includes a decompression suction device that adsorbs to the rear panel 2PE, and the second engaging device 35 includes a decompression suction device that adsorbs to the left panel 2PC. 3 The engaging device 45 may include a decompression suction device that adsorbs to the front panel 2PA, and each may be decompressed and detachably engaged with the corresponding panel. Further, in the second embodiment, the first engaging device 25 includes a decompression adsorption device that adsorbs to the rear panel 2PE, and the second engaging device 35 includes a decompression adsorption device that adsorbs to the front panel 2PA, and each of them reduces the pressure. May be detachably engaged with the corresponding panel. These vacuum suction devices may be the same as those of the vacuum suction device 69 provided in the molding device 61.

In the box opening devices 10, 201, and 301 according to the first embodiment, the second embodiment, and the third embodiment, an L-shaped metal fitting in which two plate members are connected in an L-shape is used as a connecting tool 47. There is. The end on one end side of the L-shaped bracket and the second engaging device main body 36 or the second support member 19 are connected via a hinge, and the other end of the L-shaped bracket and the third engaging device 45 Are connected via hinges, and when the support device 12 is in the closed form, the connecting portions of the two plate members constituting the L-shaped metal fitting are configured to project rearward. A torsion coil spring is provided on each of the two hinges connected to both ends of the L-shaped metal fitting, and the torsion coil spring allows the plate material on one end side of the L-shaped metal fitting to be engaged with the second engaging device 35 or the second support member 19. It may be urged so as to form a predetermined angle, and the plate material on the other end side of the L-shaped metal fitting and the third engaging device 45 may be urged to form a predetermined angle. By using the urging force of the torsion coil spring, the shape of the body portion 2P can be determined more accurately.

1: Box making machine according to the first embodiment 10: Box opening device 12: Support device 15: Parallel link mechanism 16: Swing link 17: Intermediate link 18: First support member (rear support member)
19: Second support member (horizontal support member)
25: First engaging device (rear engaging device)
27: Pin 28: Second actuator (rear drive device)
35: Second engaging device (horizontal engaging device)
44: Third support member (front support member)
45: Third engaging device (front engaging device)
49: 7th actuator (front drive device)
55A: Outer flap folding plate 55B: Outer flap folding member 56: Fifth actuator (displacement device)
61: Molding device 2PA: Front panel (front side plate)
2PB: Left front panel (first intermediate side plate)
2PC: Left panel (horizontal plate)
2PD: Left rear panel (second intermediate side plate)
2PE: Rear panel (rear side plate)
200: Box-making machine according to the second embodiment 201: Box-opening device according to the second embodiment 300: Box-making machine 301 according to the third embodiment: Box-opening device according to the third embodiment

Claims (12)

On an octagonal tubular body with a plurality of side plates extending up and down and connected to each other via creases, a plurality of upper flaps provided on the upper edge of the body, and on the lower edge of the body. A box-making machine equipped with a box-opening device that changes a box body having a plurality of provided lower flaps from a state in which the body portion is folded flat to a box-opening state in which the body portion forms an octagonal cylinder. There,
The box-opening device is an engaging device that detachably engages with at least one of the side plate of the body portion, the upper flap provided on the upper edge of the side plate, and the lower flap provided on the lower edge of the side plate. A support device having a support member provided with
The support member supports the side plate by engaging the engagement device provided in the support device with the side plate.
Of the support members, at least two of the support members each support two of the side plates connected to each other via one or more of the side plates.
In the support device, the relative arrangement of the engagement device provided on the support member is equal to the relative arrangement of the side plate corresponding to the engagement device of the flatly folded box body. The closed form in which the support member is arranged and the relative arrangement of the engagement device provided on the support member are in the open state, and the side plates of the box body corresponding to the engagement device are relative to each other. It is configured to be displaceable in an open form in which the support member is arranged so as to be equal to the arrangement .
As the support member, the support device includes a front support member that supports the front side plate, a rear support member that supports the rear side plate arranged in parallel with the front side plate in the opened state, and one first support member on the front side plate. It has a lateral support member that is connected via one intermediate side plate and supports a lateral side plate that is connected to the rear side plate via one second intermediate side plate.
When the support device is in the open form, the lateral support member is opened so as to form approximately 90 degrees with respect to the rear support member, and the front support member is opened with respect to the rear support member. A box-making machine characterized in that it is arranged in parallel over a distance smaller than the sum of the widths of the intermediate side plate, the horizontal side plate, and the second intermediate side plate, and larger than the width of the horizontal side plate . The box is configured to be deformable so as to close the opening under the box by bending the lower flap.
The body of the box in the opened state has the same shape as the body of the box deformed so as to close the opening under the box by bending the lower flap. The box-making machine according to claim 1. The box is a state in which the crease between the second intermediate side plate and the rear side plate or the crease between the second intermediate side plate and the side of the lateral side plate is folded flat. The box-making machine according to claim 1 or 2 , wherein the side edge of the body is formed. When the support device is in the closed form
Among the front support member, the lateral support member, and the rear support member, the side plate corresponding to the support member is supported at the position of the side plate with respect to the support member when the support device is in the open form. And
Any one of claims 1 to 3, wherein the support member other than the one support member supports the engaging device provided on the support member so as to be displaceable in the extending direction thereof. The box-making machine described in one section . The front support member supports the front engagement device so as to be displaceable in its extending direction.
The lateral support member supports the lateral engaging device so as to be displaceable in its extending direction.
The rear support member supports the rear engagement device so as to be displaceable in its extending direction.
A front drive device is provided between the front engagement device and the front support member to displace the front engagement device with respect to the front support member along the extending direction of the front support member.
A rear drive device is provided between the rear engagement device and the rear support member to displace the rear engagement device with respect to the rear support member along the extending direction of the rear support member.
When the support device is transformed from the closed form to the open form, the front drive device displaces the front engagement device from an initial position to a predetermined rear position, and the rear drive device causes the rear drive device to move. The box-making machine according to any one of claims 1 to 4 , wherein the rear engaging device is displaced from an initial position to a predetermined rear position after driving. The box body is opened in a square tubular shape by stopping the front drive device and the rear drive device and deforming the support device from the closed form to the open form. The box making machine according to claim 5 . The support device includes a base, a set of equilong swing links rotatably connected to the base, and intermediate links rotatably connected to the tips of the swing links. Has a parallel link mechanism
The rear support member is supported by the intermediate link,
The box-making machine according to any one of claims 1 to 6 , wherein the lateral support member is supported by one of the swing links. The box body is formed of two parallel plate members and a plate-like member having a core having a wavy cross section sandwiched between them.
A corrugated cross section of the core is provided on the upper end face of the upper flap.
The box-making machine according to any one of claims 1 to 7 , wherein each of the engaging devices has a pin that pierces the end surface of the upper flap. It has a folding device that holds and bends the lower flap.
The bending device includes two members arranged through a gap and a displacement device that changes the distance between the two members.
The lower flap by the displacement device changes the distance of the two members is gripped by the two members, claims, characterized in that the engagement between the upper flaps and the engaging device can be released The box-making machine according to any one of claims 1 to 8 . The box-making according to any one of claims 1 to 9 , further comprising a molding apparatus for molding the body portion into an octagonal tubular shape by expanding the body portion in a predetermined width direction. Machine. The molding apparatus, engages the lower flap, while folding the bottom flaps, by place, according to claim 10, characterized in that widening the barrel in a predetermined width direction Box making machine. The forming device is to adsorb to the outer surface of the side plate of the barrel, by placing the side plates in position, according to claim 10 or claim, characterized in that widening the barrel in a predetermined width direction 11. The box-making machine according to 11 .

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