JPH09327869A - Method for making corrugated board box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the sure prism-shaped opening of even a flat cylinder for a corrugated board box which needs strong force to open, to enable the avoidance of the accumulation of a large amount of dust on the floor surface inside a machine, and to surely bottom-fold front and rear short-sized lower lid pieces without quarreling with a long-sized lower lid piece. SOLUTION: A rear surface part (e) of a flay cylinder S for a corrugated board box is suction-held by a vacuum pad 4b, the cylinder S is somewhat slanted, the front surface part of a short-sized lower lid piece (a) is pushed to the saw-teeth of a saw-tooth-shaped fixing plate 6, and the part (e) which was suction-held by the vacuum pad 4b is moved backward. A side surface part close to the corner (g) which is opened at an acute angle of about 70 deg.C of the front surface part (f) of a corrugated board box H is pushed by a press means 11 unit the angle reaches 90 deg. synchronously with the backward movement of a box opening device 4. Before short-sized lower lid pieces (a), (b) are bottom- folded, either of long-sized lower lid pieces (c), (d) is expanded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies a flat tube for a cardboard box to the upstream side of a sandwich conveyor, opens it into a rectangular rectangular tube when viewed in a plane direction, and folds short front and rear lower lid pieces to the bottom. A method of making a cardboard box by sandwiching it in a sandwich conveyor and then folding the long bottom lid pieces on both sides to the bottom, and in particular, a cardboard box that requires a large force to open the cardboard paper into a thick rectangular tube shape. The present invention relates to a method for making a cardboard box that can surely open a flat tube even in a rectangular tube shape.

[0002]

2. Description of the Related Art A method of manufacturing a cardboard box disclosed in Japanese Patent Application Laid-Open No. 8-72175 is to supply a flat tube for a cardboard box to an upstream side of a sandwich conveyer, open a rectangular tube when viewed in a plane direction, and open and close a rectangular tube. The lower lid piece is folded down to the bottom and then sandwiched into a sandwich conveyor, and then the long lower lid pieces on both sides are folded down to the bottom. The flat tube for a cardboard box stands on an endless chain belt running in a direction perpendicular to the direction, and the rear part of the flat tube for a cardboard box corresponds to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor inserting direction. The step of opening the flat tube for a cardboard box into a square tube is performed by sucking and holding the rear surface portion of the flat tube for a cardboard box with a vacuum pad and holding the flat tube for a cardboard box. The cylinder is slightly tilted to the front side, the short lower lid piece on the front part is pressed against the endless chain belt, and the vacuum pad is moved in the direction opposite to the direction of being inserted into the sandwich conveyor, and the rear surface is suction-held by the vacuum pad. While moving the part by the vertical dimension of the cardboard box in the direction opposite to the vertical feeding direction, the running force of the endless chain belt is transmitted to the front part to the position corresponding to the sandwiching space of the sandwich conveyor on the front part. It is configured to cause movement in the lateral direction and gradually open it into a rectangular tube shape, and when it is opened in a rectangular rectangular tube shape seen in a plane direction, it slightly rises above the endless chain belt, and is sandwiched in a sandwich conveyor Is a configuration in which the vacuum pad is moved in the direction of being inserted into the sandwich conveyor.

[0003]

According to the conventional cardboard box manufacturing method described above, the cardboard box suctioned and held by the vacuum pad by moving the vacuum pad in a direction opposite to the sandwiching direction to the sandwich conveyor. When moving the rear part of the flat cylinder for the cardboard box in the direction opposite to the vertical feed direction by the vertical dimension of the cardboard box, tilt the flat tube for the cardboard box slightly to the front and run the short lower lid piece on the front part The front part is prevented from moving in the opposite direction to the sandwich conveyor by pressing it against the chain belt, so that the front part cannot move in the opposite direction to the sandwich conveyor. Is not enough, and as a result, a flat tube for a cardboard box that requires a large force to open the front cardboard paper into a thick square tube by stacking two sheets Has a problem that it frequently fails to open in a rectangular tube shape.The endless chain belt frictionally slides the short bottom lid piece on the front part of the flat tube for a cardboard box, so if you move it for several hours, There is a problem that a large amount of dust accumulates on the floor surface.When opening the flat tube for a cardboard box into a rectangular tube and then folding the short front and rear bottom lid pieces to the bottom, the front and rear short bottom lid pieces are long on both sides. When the state of hitting the lower lid piece occurs, it is not possible to fold the front and rear short lower lid pieces to the bottom, and the front and rear short lower lid pieces are valley-folded from the center of the width, resulting in a flat state that is 90 ° different from the original flat state. The problem that it folds occurs.

According to the first invention of the present application, even a flat tube for a cardboard box, which requires a large force to open the cardboard paper into a thick rectangular tube, can be surely opened into a rectangular tube, and the floor surface inside the machine can be surely opened. It is an object of the present invention to provide a method for making a cardboard box in which a large amount of dust is prevented from accumulating. The second invention of the present application is that even a flat tube for a cardboard box, which requires a large force to open the cardboard paper into a thick rectangular tube shape, can be reliably opened into a rectangular tube shape, and a large amount of dust on the floor surface inside the machine. When the flat cylinders for cardboard boxes are opened into square tubes and the front and rear short lower lid pieces are bottom-folded, the front and rear short lower lid pieces contact the long lower lid pieces on both sides. It is an object of the present invention to provide a method for making a cardboard box in which the front and rear short lower lid pieces can be reliably folded at the bottom while avoiding the above.

[0005]

As a first invention of the present application,
The flat cylinder for cardboard boxes is erected on the upstream side of the sandwich conveyor to open into rectangular rectangular cylinders when viewed in the plane, and the front and rear short bottom lid pieces corresponding to the conveyor conveyance direction are folded down to the sandwich conveyor. In the method for making a cardboard box in which the long lower lid pieces on both sides are bottom-folded, the step of supplying the flat tube for the cardboard box is
The cardboard box flat cylinder is configured to be supplied on the floor plate in a standing state and to make the rear surface part of the cardboard box flat cylinder correspond to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction. The process of opening to
The serrated locking plate whose tooth row direction matches the conveyor insertion direction is slightly projected onto the floor plate, and the flat cylinder for the cardboard box is suction-held by the vacuum pad and the flat cylinder for the cardboard box is forward. Slightly tilt it and press the short lower lid piece of the front part against the saw teeth of the serrated locking plate to prevent the front part from moving in the opposite direction to the sandwich conveyor, and then sandwich the vacuum pad. It moves in the direction opposite to the direction in which it is inserted into the conveyor, and moves the rear surface portion sucked and held by the vacuum pad in the direction opposite to the vertical feed direction by the vertical dimension of the cardboard box, and thereby the front surface portion. It causes a lateral movement to a position corresponding to the sandwiching space of the and gradually opens in a rectangular tube shape, and the front of the vacuum pad just before the end of movement. A method for making a cardboard box, characterized in that a side surface portion close to a sharply opened corner of a minute is pressed by the pressing means to a right angle to open in a rectangular rectangular tube shape when viewed in a plane direction. To provide. As a second invention of the present application, a flat tube for a cardboard box is supplied to the upstream side of the sandwich conveyor, opened in a rectangular rectangular tube shape when viewed in a plane direction, and the front and rear short lower lid pieces are bottom-folded and then sandwiched in the sandwich conveyor. In the method for making a cardboard box, in which the long lower lid pieces on both sides are bottom-folded, the step of supplying the flat tube for the cardboard box includes supplying the flat tube to the floor board in a standing state and for the cardboard box. It is a configuration in which the rear surface portion of the flat tube corresponds to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction,
In the step of opening the flat tube for the cardboard box into a rectangular tube shape, the serrated locking plate whose tooth row direction coincides with the conveyor inserting direction is slightly projected on the floor plate, and the rear surface part of the flat tube for the cardboard box is It is sucked and held by a vacuum pad, and the flat cylinder for a cardboard box is slightly tilted to the front side, and the short lower lid piece of the front part is pressed against the serrated teeth of the serrated locking plate to insert the front part into the sandwich conveyor. Disabling movement in the opposite direction, and then moving the vacuum pad in the direction opposite to the sandwiching direction to the sandwich conveyor to move the rear surface portion sucked and held by the vacuum pad in the direction opposite to the vertical feeding direction. Move only the vertical dimension,
This causes the front part to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor, and gradually opens into a rectangular tube shape, which is closer to the corner of the front part that is opened at an acute angle than immediately before the end of movement of the vacuum pad. By pressing the side surface portion to a right angle by a pressing means, it is configured to open in a rectangular rectangular tube shape when seen in a plane direction, and the front and rear short lower lid pieces are opened after the flat cardboard box flat tube is opened in the rectangular tube shape. Before the bottom folding, the cardboard is constructed such that at least one of the long lower lid pieces on both sides is slightly opened so as not to interfere with the bottom folding of the front and rear short lower lid pieces. It is to provide a method of box making.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A method for making a cardboard box according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 (a) and 1 (b), this cardboard box manufacturing method has endless conveyor belts 1c on two vertical axis belt rolls 1a and 1b with a pair of left and right sides. And the floor plate 2 is provided on the upstream side of the sandwich conveyor 1 whose distance can be adjusted based on the center of the distance, and the frontmost flat cardboard box S for cardboard boxes stacked in the stacking device 3 is opened. 2 is dropped from between the guide / pressing plate 4a and the guide 5 and is supplied to the floor plate 2 in an upright state. Then, as shown in FIGS. 2 (a) and 2 (b), the tooth row direction is a conveyor. The floor plate 2 is provided with the serrated locking plate 6 that is aligned with the inserting direction.
After slightly projecting upward, the box opening device 4 is slightly moved toward the sandwich conveyor 1 to suck and hold the rear surface portion e of the cardboard box flat cylinder S by the vacuum pad 4b of the box opening device 4 to guide and press the plate. 4a is pressed against the upper portion of the rear surface portion of the cardboard box flat cylinder S, the cardboard box flat tube S is slightly tilted to the front side, and the short lower lid piece a of the front surface portion is pressed against the saw teeth of the serrated locking plate 6. , And then FIG.
As shown in FIGS. 4 and 5, by moving the box opening device 4 rearward, the rear surface portion e sucked and held by the vacuum pad 4b is moved by the vertical dimension of the cardboard box in the direction opposite to the vertical feed direction. As a result, the short lower lid piece a is locked to the sawteeth of the serrated locking plate 6 and the front portion f corresponding to the short lower lid piece a is moved laterally to a position corresponding to the sandwiching space of the sandwich conveyor 1. Of the swivel arm, which is opened from the rhombus to the square when viewed in the plane direction, and is swung in the horizontal plane by the air cylinder device or the like from the time when the backward movement of the box opening device 4 is almost finished. The front part f of the cardboard box H opened in a parallelogram shape close to a rectangle was opened at an acute angle of about 70 ° by a box opening assisting pressing means 11 having a roller-shaped pressing element 11b at the tip of 11a. Near corner g The side surface part is pressed until it becomes a right angle in synchronism with the backward movement of the box opening device 4, and the box opening device 4 stops moving when it moves by the vertical dimension of the cardboard box, and has a rectangular rectangular tube when viewed in the plane direction. 6 is completed, and then, as shown in FIG. 6, the saw-teeth locking plate 6 is lowered to swing the swing flaps 7a of the pair of lid piece fight avoidance devices 7 about 100 ° upward from the horizontally opposed posture. Then, the long lower lid pieces c and d on both sides are opened slightly more than the parallel state, and the front and rear short lower lid pieces a,
After not interfering with the bottom folding of b, the bottom folding plate 4c of the box opening device 4 and the bottom folding plate 8 provided between the belts of the sandwich conveyor 1 are swung by 90 °, and the front and rear short bottom lids are rotated. The pieces a and b are folded to the bottom, and then, as shown in FIG. 7, the swing flaps 7a of the pair of lid piece fighting avoidance devices 7 are returned and swinged to the left and right long lower lid pieces c of the cardboard box H. d
8 is released, and then the cardboard box H opened by advancing the box opening device 4 is inserted into the sandwich conveyor 1 as shown in FIG. The front and rear short lower lid pieces a, b are placed on the bottom slide guides 10, 10 and the bottom folding guides 10, 10 perform bottom folding of the long lower lid pieces c, d on both sides. When 4c and 8 return swing by 90 °, the flat cylinder S for the cardboard box is again dropped and supplied.

As can be seen from the above, even if a flat tube for a cardboard box, which requires a large force to open two cardboard sheets in a thick and square tube shape, the point of solution for surely opening the cardboard box in a square tube shape is The rear surface portion e of the flat cylinder S for boxes is suction-held by the vacuum pad 4b, the flat cylinder S for cardboard boxes is slightly tilted to the front side, and the short lower lid piece a of the front part is pressed against the saw teeth of the serrated locking plate 6. After that, the rear surface portion e sucked and held by the vacuum pad 4b is moved backward. Sandwich conveyor 1 on the front part f of the cardboard box
The point of the solution for completely moving in the lateral direction to the position corresponding to the sandwiching space is close to the corner g of the front part f of the cardboard box H opened by the pressing means 11 at an acute angle of about 70 °. This is to press the side surface portion in synchronism with the backward movement of the box opening device 4 until it becomes a right angle. Before bottom-folding the short lower lid pieces a, b, the long lower lid pieces c, d
One of the points is to expand either one of the above in order to favorably perform bottom folding of the short lower lid pieces a and b without fighting with the long lower lid pieces c and d on both sides.

The sandwich conveyor 1 is driven by a servo motor (not shown). In the box opening device 4, a bracket 4f is supported by a slider 4e guided by a linear guide 4d, and the slider 4e is connected to an endless traveling body (timing belt or chain) of a winding device which is driven and driven by a servo motor (not shown). The bracket 4f is provided with a guide / press plate 4a, a vacuum pad 4b, and a bottom folding plate 4c.
The guide / pressing plate 4a is biased forward by a spring 4g. The pair of lid piece quarrel avoidance devices 7, 7 is a cardboard box H.
The distance and height from each other are adjusted according to the size of the. The height of the floor plate 2 and the serrated locking plate 6 is adjusted according to the size of the cardboard box H. The position of the rotation center of the revolving arm 11a is adjusted according to the size of the cardboard box H. The position of the backward movement stroke of the box opening device 4 is adjusted according to the size of the cardboard box H. The position of the drop guide 12 is adjusted according to the size of the flat tube S for a cardboard box. It is preferable that the pressing member 11b of the pressing means 11 is in the shape of a roller, because no scratch mark is left on the outer surface of the cardboard box H.

Next, an embodiment included in the technical scope of the present invention will be exemplified in comparison with the above embodiment. The flat cylinder S for the cardboard box need not be supplied by dropping. The bottom fold plate 8 is not provided, and instead, the end of the rail 9 is inclined and lowered, and the bottom fold plate 4c bottoms the short lower lid piece b on the rear side. Although the short lower cover piece a cannot be folded to the bottom, when the opener 4 is advanced to insert the opened cardboard box H into the sandwich conveyor 1, the inclined lower end of the rail 9 is lowered. Alternatively, the short lower lid piece a on the front side may be folded to the bottom. It suffices for the lid piece fighting avoidance device 7 to be provided with not one pair but one. The reason is that the bottom folds of the short lower lid pieces a and b do not quarrel with the long lower lid pieces c and d on both sides only by expanding one of the long lower lid pieces c and d (interfering with each other). It was because it was confirmed in the prototype that it could be performed satisfactorily. In order to reduce the operation time, in the operation process shown in FIG. 4, one (right) lid piece quarrel avoidance device 7 corresponding to the inside position of the cardboard box H opened in a parallelogram.
By pushing up, when the lid piece quarrel avoiding device 7 reaches the operation process shown in FIG. 5, the long lower lid piece c is slightly moved in the direction opposite to the pressing direction of the pressing means 11 for assisting box opening. It may be expanded. The saw-tooth-shaped locking plate 6 may be a plurality of thin plates having saw teeth formed on the plate without a length and spaced from each other. The bottom folding of the long lower lid pieces c and d of the cardboard box H is driven by the sandwich conveyor 1 at a position sandwiched by the sandwich conveyor 1 shown in FIG. After stopping, bottom folding may be performed by a pair of long lower lid piece bottom folding devices. The maintenance of the closed state of the bottom of the cardboard box H may be achieved by any of tape sticking, hot melt bonding, and a stitcher needle.

[0010]

As described above, according to the cardboard box manufacturing method of the first invention and the second invention of the present application,
Even a flat tube for a cardboard box that requires a large force to open the cardboard box into a thick rectangular tube can be locked so that the short lower lid piece on the front side of the cardboard box is not pulled backward when opening the box. It is possible to secure the opportunity to open the box and ensure that the short lower lid piece on the front side of the cardboard box is not pulled backward even while the box is open, and it is possible to slide laterally, and from the latter half of the box opening process. Since the side part of the cardboard box is pushed, it can be surely opened so as to have a rectangular rectangular tube shape when viewed in the plane direction. The short lower lid piece on the front side of the cardboard box is slidably locked by a serrated locking plate so as to prevent relative movement of the short lower lid piece and the serrated locking plate in the tooth row direction. Therefore, the short lower lid piece is not scraped off by the serrated locking plate, and a large amount of dust can be prevented from being accumulated on the floor inside the machine.
Further, according to the method for making a cardboard box of the second invention of the present application, at least one of the pair of left and right before opening the flat tube for the cardboard box into a rectangular tube shape and before bottom-folding the front and rear short lower lid pieces is selected. Since one of the long bottom lid pieces is expanded slightly, the front and rear short bottom lid pieces can be extended on both sides of the flat tube for cardboard boxes, which requires a large force to open the cardboard paper into a thick rectangular tube. You can surely fold the bottom without quarreling with the shaku under lid.

[Brief description of drawings]

1 relates to a cardboard box box making apparatus adopting a cardboard box box making method according to an embodiment of the present invention, (a) is a plan view of a step of supplying a flat tube for a cardboard box, (b) Is a front view.

2A is a plan view showing the next step of FIG. 1A, showing a state where a flat tube for a cardboard box is sucked by a vacuum pad, and FIG. 2B is a front view.

FIG. 3 is a plan view showing the next step of FIG. 2 (a) and showing a state in which a flat cylinder for a cardboard box is opened in a parallelogram by moving the vacuum pad backward.

FIG. 4 shows the next step of FIG. 3, in which the vacuum pad moves backward to the end point straightness, the flat tube for the cardboard box is opened in a state close to a rectangle, and the pressing means for assisting the opening of the box presses it. The top view which shows the state which started.

FIG. 5 is a plan view showing the next step of FIG. 4, in which the vacuum pad stops moving backward and the lid piece quarrel avoidance device slightly expands the left and right long lower lid pieces of the cardboard box; Fig.

FIG. 6 is a plan view showing the next step of FIG. 5, showing a state in which the vacuum pad remains stopped moving backward and the short lower lid pieces before and after the cardboard box are bottom-folded;

FIG. 7 is a plan view showing the next step of FIG. 6 in a state where the vacuum pad remains stopped moving backward and the left and right long lower lid pieces of the cardboard box are unrolled;

FIG. 8 shows the next step of FIG. 7, in which the vacuum pad moves forward to sandwich the cardboard box between the belts of the sandwich conveyor 1, and the long lower lid pieces on the left and right of the cardboard box. FIG. 4 is a plan view showing a state in which bottom folding is started.

[Explanation of symbols]

S ・ ・ ・ Flat cylinders for cardboard boxes a, b ・ ・ ・ Short bottom lid pieces before and after the flat tubes for cardboard boxes c, d ・ ・ ・ Long bottom lid pieces left and right of flat tubes for cardboard boxes e ・ ・ ・Rear part of flat tube for cardboard box f ・ ・ ・ Front part of flat tube for cardboard box H ・ ・ ・ Opened cardboard box 1 ・ ・ ・ Sandwich conveyor 2 ・ ・ ・ Floor plate 4b ・ ・ ・ Vacuum pad 4c ・ ・・ Bottom folding plate 6 ・ ・ ・ Sawtooth locking plate 7 ・ ・ ・ Lid piece fight avoiding device 11 ・ ・ ・ Pressing means

Claims (2)

[Claims] 1. A flat tube for a cardboard box is erected on the upstream side of a sandwich conveyor and supplied to open a rectangular rectangular tube when viewed in a plane direction, and front and rear short bottom lid pieces corresponding to the conveyor transportation direction are bottom-folded. In the method for making a cardboard box, which is then sandwiched in a sandwich conveyor and then bottom-folded the long lower lid pieces on both sides, in the step of supplying the flat tube for a cardboard box, the step of supplying the flat tube for the cardboard box to the floorboard in a standing state is performed. The configuration is such that the rear surface portion of the cardboard box flat cylinder that is supplied corresponds to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction. The sawtooth locking plate whose direction matches the conveyor insertion direction is slightly projected onto the floor plate, and the rear surface of the flat tube for the cardboard box is suction-held by a vacuum pad and The flat cylinder for the box is slightly tilted to the front side and the short lower lid piece of the front part is pressed against the saw teeth of the serrated locking plate to prevent the front part from moving in the opposite direction to the sandwich conveyor. Then, the vacuum pad is moved in the direction opposite to the sandwiching direction to the sandwich conveyor, and the rear surface portion sucked and held by the vacuum pad is moved in the direction opposite to the vertical feeding direction by the vertical dimension of the cardboard box. ,
This causes the front part to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor, and gradually opens into a rectangular tube shape, which is closer to the corner of the front part that is opened at an acute angle than immediately before the end of movement of the vacuum pad. A method for making a cardboard box, characterized in that the side surface part is pressed to a right angle by a pressing means to open in a rectangular rectangular tube shape when viewed in a plane direction. 2. A flat tube for a cardboard box is supplied to the upstream side of the sandwich conveyor, opened in a rectangular rectangular tube shape when seen in a plan view, and the short front and rear lower lid pieces are bottom-folded and then inserted into the sandwich conveyor. Then, in the method for making a cardboard box, the steps of bottom-folding the long lower lid pieces on both sides, in the step of supplying the flat tube for the cardboard box, the step of supplying the flat tube for the cardboard box in a standing state and the flat tube for the cardboard box The rear surface portion is configured to correspond to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction, and in the step of opening the flat cylinder for the cardboard box into a square tube shape, the tooth row direction is the same as the conveyor sandwiching direction. The serrated locking plate is slightly projected above the floor plate, the rear surface of the flat cardboard box cylinder is suction-held by a vacuum pad, and the flat cardboard box cylinder is slightly tilted forward. And press the short lower lid piece of the front part against the saw teeth of the serrated locking plate to prevent the front part from moving in the direction opposite to the sandwiching direction of the sandwich conveyor, and then the vacuum pad to the sandwich conveyor. Moving in the direction opposite to the inserting direction and moving the rear surface part sucked and held by the vacuum pad in the direction opposite to the vertical feeding direction by the vertical dimension of the cardboard box,
This causes the front part to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor, and gradually opens into a rectangular tube shape, which is closer to the corner of the front part that is opened at an acute angle than immediately before the end of movement of the vacuum pad. By pressing the side surface portion to a right angle by a pressing means, it is configured to open in a rectangular rectangular tube shape when viewed in a plane direction, and the front and rear short lower lid pieces are opened in the rectangular tube shape for the corrugated cardboard box. Before the bottom folding, the cardboard is constructed such that at least one of the long lower lid pieces on both sides is slightly opened so as not to interfere with the bottom folding of the front and rear short lower lid pieces. How to make boxes.