JP4683801B2 - Box making machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a box making machine that forms a blank set on a support portion into a box by folding a flap formed around the blank.
[0002]
[Prior art]
Conventionally, a wide variety of box-making machines have been proposed for forming a box by folding or folding a sheet-like blank, but mainly inserting a middle mold inside and folding the blank around the middle mold The structure is well known. In general, a box making machine using a medium size has a complicated folding mechanism, which increases the manufacturing cost of the can making machine. Therefore, when a small amount of boxes are assembled and used at the boxing work site, it is virtually impossible to introduce such a box making machine, and box making by hand is almost forced.
[0003]
However, the work efficiency is poor in completely manual work, and it is difficult to bend and fold in a blank that is strong and strong, such as a waterproof blank, and the work load is large. In general, the box making work involves folding and winding the flaps, but making the box on the desk or in the air is difficult enough to require an expert who knows the procedure and skill. In addition, the finished state was not uniform and unbalanced depending on the worker and even for the same worker from lot to lot.
[0004]
[Problems to be solved by the invention]
In a box making machine that folds or folds a blank to form a box, the guide plate that folds or folds the flap is generally turned or turned by turning the guide plate. In order to perform such an operation, a complicated mechanism such as a link mechanism is required, which also increases the manufacturing cost of the box making machine. Therefore, there is a problem to be solved in that a box making operation is performed by rotating the guide plate with a simple mechanism without using a medium size, and a device for making the box making machine structure simple.
[0005]
The object of the present invention is to rotate the guide plate for folding the side flaps with a simple mechanism to give a clean and uniform finish without requiring a skilled person, and to produce a small number of boxes. Even so, it is to provide a can-making machine that can be manufactured at low cost so that it can be introduced.
[0006]
[Means for Solving the Problems]
  In order to solve the above problems, the box making machine according to the present invention is:A side flap having a quadrangular central portion and a flap formed around its four sides, and comprising a pair of first side flaps facing each other and a pair of second side flaps facing each other. It is a box making machine that forms a blank without a slit formed in a crease, consisting of corner flaps,A central support part that supports the central part of the blank, and is arranged outside the four sides around the central support part to fold up the side flaps and can stand up inward.A first folding guide for folding the first side flap and a second folding guide for folding the second side flap.A bending guide, and a drive mechanism for raising the bending guide;And a flap folding mechanism for folding the corner flaps formed at the four corners of the blank to the adjacent side flaps,
  The bending guide is a folding plate that can share the central support portion and support the blank in a flat plate state in a standby state before starting to stand up.The second folding guide is formed in a shape inclined at both ends,The drive mechanism includes a roller which is moved up and down below the bending guide and can be rolled and engaged with the bending guide;The flap folding mechanism includes an arm that is rotatable along the side flap, and a folding roller that is rotatably attached to a tip portion of the arm and that can be engaged with the corner flap. The rotation center side is formed into a constricted bowl shape.
[0007]
According to this box making machine, the center of the blank is first supported by the center support part of the box making machine. In the standby state before the start of bending, the side flaps formed outside the central part of the blank are supported by a bending guide in a lying posture, a part of which is located around the central support part Is done. Accordingly, the blank is supported in a flat plate state in which the central portion and the side flaps are shared by the central support portion and the bending guide, respectively. Next, by operating the drive mechanism, the roller rising below the folding guide rolls and engages with the folding guide, and the folding guide arranged on the outer sides of the four sides around the center support portion faces inward. Stand up. The standing folding guide performs box making by bending the side flaps upward around the central portion. The simple ascending motion of the roller is smoothly converted into the rotation of the bending guide using the rolling of the roller. The folding of the side flaps around the four sides of the central portion is performed by collectively folding the side flaps without moving the blank main body (center portion) and without using the middle mold.
[0008]
By using the folding guide as the folding plate, the folding plate pushes the flap into a planar shape and bends it, so that a stable and reliable folding action can be generated. The bent plate does not necessarily have the same shape, but can be a guide plate formed in a shape corresponding to the shape of the side flaps. In addition, the means for raising the folding guide to the inside is a roller that moves up and down below the bending guide, so that the roller engages with the bending guide while rolling, and how the folding guide rises. Even if the standing angle is large, it comes into rolling contact with the bending guide. Accordingly, the frictional resistance generated between them is extremely small, and the side flap folding operation is very light and smooth, and the power required for the drive mechanism is reduced. It is preferable to apply an urging force to the bending guide in a direction to return to a standby state before standing by a return spring. Since the bending guide is always pressed against the roller by the urging force of the return spring, the operation is stabilized. When returning the operation of the drive mechanism, the bending guide automatically returns to the standby state following the roller that is lowered by the spring force of the return spring.
[0009]
In this box making machine, the central support portion may be a vacuum pad that adsorbs the central portion of the blank. By adsorbing the center of the blank with a vacuum pad, positioning in the blank box making machine is secured, and even when the folding guide stands up inward and folds the side flap, The blank is prevented from lifting from the central support which causes it to end unsuccessfully. Alternatively, in the box making machine, the central support portion may be a mounting plate on which the central portion of the blank is mounted. When the mounting plate is used, the suction equipment is not required, so that the manufacturing cost of the box making machine can be further reduced. When folding the side flaps with the folding guide, it does not need to be a medium size to prevent the blank from lifting up from the center support, but the blank is pressed against the center support by some kind of weight or pressing such as manual work. It is preferable to attach it.
[0010]
In the box making machine provided with the above drive mechanism, the central support portion is formed in a partial region of the top plate of the table, and the drive mechanism is a foot pedal provided on the lower side of the table, and the foot pedal. A lifting platform guided up and down by the table via a lifting rod may be provided, and the roller may be rotatably attached to the lifting platform. By providing a foot pedal in the drive mechanism, it is possible to operate the box making machine in an extremely energy saving manner even in the case of a boxing site where there are no electrical or pressure equipment nearby. When the foot pedal is depressed, the elevating rod rises and the rollers rise with the elevating platform. Since the lifting platform is guided by the table, the lifting position of the roller attached to the lifting platform is stabilized, and the operation timing of the bending guide is also stabilized.
[0011]
The box making machine further includes a flap folding mechanism for folding corner flaps formed at the four corners of the blank to the adjacent side flaps, and the flap folding mechanism is provided on the side flaps. An arm that can be rotated along, and a folding roller that is rotatably attached to the tip of the arm and can be engaged with the corner flap. When the corner flaps formed at the four corners of the blank are folded out of the box, it is necessary to fold the side flaps already folded. The flap folding mechanism includes an arm that can be rotated along the side flaps, and a folding roller that is rotatably attached to the tip of the arm and can be engaged with the corner flap. When rotating along the side flaps, a folding roller attached rotatably to the tip of the arm moves so as to stroke the corner flaps, and the corner flaps are folded over the side flaps. The folded corner flap can then be maintained in a state of being overlapped with the side flap by, for example, winding / engaging using a folded portion or a winding portion following the side flap.
[0012]
In the box making machine provided with this flap folding mechanism, the folding roller can be formed in a bowl shape with a narrowed rotation center side. Assuming the folded state of the corner flaps, the portion closer to the side flaps swells outward. When the folding roller has a simple cylindrical shape, when the folding roller rotates together with the arm, the edge of the ridgeline where the bottom surface of the folding roller, particularly the rotation center side with a small rotation radius intersects the cylindrical surface, The corner flaps that bulge outward may be scratched. Accordingly, by forming the folding roller into a bowl shape with the rotation center side narrowed, the curved surface portion of the bowl shape of the folding roller comes into contact with the swollen part of the corner flap in advance, so that the corner flap comes into contact with the corner flap. It is prevented from being scratched.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a box making machine according to the present invention will be described below with reference to the drawings. Prior to the description of the box making machine, the blank B to be boxed will be described with reference to FIG. FIG. 5A is a developed plan view of a blank to be boxed, and FIG. 5B is a front view of the box obtained by boxing the blank. For example, the blank B can be a cardboard material such as corrugated cardboard that has been subjected to water resistance treatment and has a developed shape shown in FIG. The blank B has a rectangular central part b0 and flaps formed around the four sides, and the flaps are a first side flap b1 along the long side and a second side part along the short side. It consists of a flap b2 and a corner flap b3. The second side flap b2 is formed with a folded portion b4 that is folded back so as to be overlapped with the folded corner flap b3, and a winding portion b5 that continues to the outside. In the corner flap b3, an engaging portion b6 that engages when the winding portion b5 is wound is formed so as to protrude sideways.
[0014]
The box C formed by bending the blank B shown in FIG. 5A by the box making machine 1 is, after the corner flap b3 is folded outward, as shown in FIG. It is folded on the side flap b2. At the time of box making, the folded portion b4 that continues to the outside of the second side flap b2 is further overlapped on the corner flap b3 that is folded outward and folded on the second side flap b2. A winding part b5 is formed in a projecting shape on the further outer side of the folded part b4, and the winding part b5 is manually wound inside the engaging part b6 superimposed on the second side flap b2. The shape as the box C is maintained. Normal blanks are easy to fold by forming slits in the folds, etc., but blanks that have been water-resistant are not formed with slits as part of preventing water leakage. Have difficulty. The box making machine 1 according to the present invention can be box-made with any blank.
[0015]
FIG. 1 is a perspective view showing an overview of an embodiment of a box making machine according to the present invention. 2 is an enlarged front view showing a part of the box making machine according to the present invention shown in FIG. 1, and FIG. 3 is a diagram showing the middle of the blank box making operation by the box making machine according to the present invention shown in FIG. It is a perspective view of a part. As shown in FIG. 1, the box making machine 1 according to the present invention has a movable table shape with casters 2. The box making machine 1 has upper and lower, left and right and front and rear frame frames 3, and a top plate part 4 includes a central support part 5 that supports the central part b0 of the blank B at the center, a margin part 6 around the central support part 5, The bridge portion 7 connects the support portion 5 and the margin portion 6. In this example, the center support portion 5 is a placement plate supported by the bottom frame frame 3a by four support columns 9, and is used to place the center portion b0 of the blank B as a partial region of the table top portion 4 of the table. belongs to. Each column 9 also functions as a guide for a drive mechanism 20 described later.
[0016]
In order to produce the box C by bending the blank B, various folding guides for box making are arranged between the central support part 5 of the box making machine 1 and the margin part 6 around it. A rectangular hole is formed. That is, first folding guides 11 and 11 for folding the first side flap b1 of the blank B are arranged in the first holes 10 and 10 formed outside the long sides 5a and 5a of the central support portion 5. The second folding guide 13 for folding the second side flap b2 of the blank B is provided in the second holes 12 and 12 formed outside the short sides 5b and 5b of the central support 5. 13 is disposed. Each 1st bending guide 11 and each 2nd bending guide 13 are connected with the long side 5a of the center support part 5, or the short side 5b so that rotation is possible by hinges 14 and 14 (refer FIG. 2), respectively. ing.
[0017]
Each first folding guide 11 is made of a rectangular plate having a width corresponding to the first side flap b1, and each second folding guide 13 corresponds to the second side flap b2, but the shape is inclined at both ends. It is made of a finished board. The height of the side flaps b1 and b2 is usually higher than that of the bending guides 11 and 13. In the standby state before the folding guides 11 and 13 are erected by the driving mechanism 20 described later, the surface side that contacts the blank B is flush with the surface of the mounting plate that is the central support portion 5. And a part of the first side flap b1 and the second side flap b2 can be supported. In order to maintain both folding guides 11 and 13 flush with the center support 5 in the standby state, an appropriate stopper can be provided on the top plate portion 4. Further, by defining a lowering position of the drive mechanism 20 described later, the double-folded guides 11 and 13 can be configured to restrict further downward rotation from the flush state.
[0018]
The drive mechanism 20 includes a foot pedal 21 provided on the lower side of the table, a lifting platform 22 guided to be lifted and lowered by the support column 9, and an upper end portion and a lower end portion that are rotatably connected to the lifting platform 22 and the foot pedal 21, respectively. A lifting rod 23 is provided. By providing the foot pedal 21 in the drive mechanism 20, the box making machine 1 can be moved in an extremely energy-saving manner even when drive equipment such as a pressure source such as electricity or high-pressure air is not nearby. The foot pedal 21 is rotatably attached to the bottom frame 3a at a fulcrum 24 at an intermediate position in the longitudinal direction, and the lifting platform 22 is slid with respect to the column 9 as shown in FIG. Guided by a movable guide 25. Therefore, by the stepping operation of the foot pedal 21, the lifting platform 22 is lifted and lowered stably while being guided by the guide portion 25 via the lifting rod 23, so that the operations of the bending guides 11 and 13 are also stabilized.
[0019]
FIG. 2 selectively shows a mechanism for operating the first folding guide 11 in the left half and a mechanism for operating the second folding guide 13 in the right half. FIG. 3 shows both mechanisms in a perspective view. Referring to FIGS. 2 and 3, two first rollers 26 and 26 are rotatably supported on the lifting platform 22 below the bending guides 11. Specifically, both the first rollers 26 and 26 are attached to a common support shaft 30, and the support shaft 30 is rotatably supported by brackets 27 and 27 on the lifting platform 22. Further, below each bending guide 13, one second roller 28 is rotatably supported by the lifting platform 22 via a bracket 29.
[0020]
A return spring 31 is disposed between the first folding guide 11 and the lifting platform 22, and a return spring 32 is disposed between the second folding guide 13 and the lifting platform 22. , 32 urges the bending guides 11, 13 to return to the standby state before standing up. Therefore, when the operation of the drive mechanism 20 is returned, the bending guides 11 and 13 are automatically returned to the standby state by the spring force of the return springs 31 and 32. Further, since the return springs 31 and 32 always press the bending guides 11 and 13 against the rollers 26 and 28, respectively, the bending guides 11 and 13 always follow the rollers 26 and 28 and move blindly. Stable operation without any problems. In this example, tension springs are used for the return springs 31 and 32.
[0021]
As shown in FIG. 3A, when the elevator 22 is raised, the first rollers 26 and 26 are on the back surface of each first folding guide 11, and the second roller 28 is the back surface of each second folding guide 13. 1st and 2nd bending guides 11 and 13 (hereinafter abbreviated as bending guides 11 and 13) are rotated about the axis of their respective hinges 14 so as to stand up inward. Let While the folding guides 11 and 13 are standing up, the rollers 26 and 28 and the bending guides 11 and 13 are not in sliding contact but in rolling contact at any standing angle. The frictional resistance generated between the guides 11 and 13 is extremely small, the folding operation of the side flaps b1 and b2 is very light and smooth, and the power required to operate the drive mechanism 20 can be reduced. .
[0022]
Corner flaps b3 formed at the four corners of the blank B are folded out of the box C when the side flaps b1 and b2 are folded. In order to ensure the outward folding, it is preferable to provide means for lightly pushing the corner flap b3 that has started to rise from the inside. Since the corner flap b3 folded outward is obstructive as it is, it is necessary to fold the corner flap b3 on the side flap that has already been folded (in this case, the second side flap b2). For this reason, the box making machine 1 includes a flap folding mechanism 40 for folding the corner flap b3 to the adjacent second side flap b2. The flap folding mechanism 40 includes an arm 41 that can be rotated along the second side flap b2, and a folding roller 42 that is rotatably attached to the tip of the arm 41 and that can be engaged with the corner flap b3. ing. The arm 41 can be, for example, a bent arm that is pivotally attached to the lower surface side of the table top plate portion 4 by the pivot attachment portion 43. At the bent position of the arm 41, a contact portion 44 is formed that contacts the push-up body 45 provided on the lifting platform 22 when the lifting platform 22 is raised by the operation of the drive mechanism 20. By adjusting the height of the push-up body 45, the timing at which the push-up body 45 abuts against the abutment portion 44, that is, the folding operation timing of the corner flap b3 by the folding roller 42 is the folding of the second side flap b2. It can be adjusted to be after the bending is completed. A return spring that returns the folding roller 42 to the return position can be provided.
[0023]
As shown in FIG. 3 (b), the lifting platform 22 is lifted by the operation of the drive mechanism 20, and the folding guides 11 and 13 lift and lower after folding the first side flap b1 and the second side flap b2, respectively. The operation of the flap folding mechanism 40 is started when the push-up body 45 on the table 22 comes into contact with the contact portion 44 of the arm 41. As the elevator 22 is further raised, the first roller 26 and the second roller 28 only move while rolling to the back of the folding guides 11 and 13 that have already stood up to a vertical state. In the flap folding mechanism 40, however, The arm 41 rotates in a plane along the second side flap b2, and the folding roller 42 attached to the tip end of the arm 41 moves so as to stroke while rolling on the corner flap b3. The part flap b3 is folded over the second side flap b2. Thereafter, the folded portion b4 that is continuous with the second side flap b2 and folded outward, the winding portion b5 formed at the tip thereof, and the engagement portion b6 that is formed continuously with the corner flap b3, Due to the engagement, it can self-maintain in a state of being overlapped with the second side flap b2. If necessary, the folded corner flap b3 can be positively fixed to the second side flap b2 by an appropriate means such as adhesion or stapling.
[0024]
In the flap folding mechanism 40, the folding roller 42 can be formed in a bowl shape in which the rotation center side of the arm 31 is narrowed as shown in FIG. In general, the corner flap b3 is more difficult to bend due to the plate thickness and swells out closer to the intersection where the central portion b0, the first side flap b1, and the second side flap b1 intersect each other. Therefore, when the folding roller 42 has a simple cylindrical structure, when the folding roller 42 rotates while contacting the corner flap b3, a circular ridge line portion that intersects the cylindrical surface, in particular, the bottom surface on the rotation center side and the cylindrical surface is formed. The corner flap b3 may be damaged. Therefore, by forming the folding roller 42 in a bowl shape with the rotation center side narrowed, the curved portion of the bowl shape 36 that has been retreated in advance comes into contact with the corner flap b3, and the corner flap b3 is damaged. It is prevented from sticking.
[0025]
Since the box making machine 1 has the form of a moving table provided with casters 2, the box making machine 1 can move freely and can move to a place where boxing is required at any time. Even when the number of lots to be boxed is small, boxes C can be produced from blanks B and boxed immediately.
[0026]
The box making procedure by the box making machine 1 is as follows. First, the blank B is set, for example, by placing the central portion b0 serving as the bottom plate portion on the central support portion 5 in the shape of the mounting plate of the box making machine 1. When the foot pedal 21 of the drive mechanism 20 is stepped on while pressing the center portion b0 of the blank B against the top plate portion 4 of the table by pressing it against the center support portion 5 with both hands, the lifting rod 23 connected to the foot pedal 21 is used. The lifting platform 22 rises through. The first roller 26 rotates the first bending guide 11 and the second roller 28 rotates the second bending guide 13 against the spring force of the return springs 31 and 32, and the first side of the blank B The part flap b1 and the second side flap b2 are bent upward. The elevator 22 is further raised, and the push-up body 45 provided on the elevator 22 rotates the arm 41 of the flap folding mechanism 40 so that folding rollers 42 are formed at the four corners of the blank B. Engaging with the corner flap b3, the corner flap b3 can be folded over the second side flap b2. The shape as the box C is maintained by winding the winding part b5 of the second side flap b2 manually into the engaging part b6. By releasing the depression of the foot pedal 21, the folding guides 11 and 12 are returned to their original positions by the spring force of the return springs 31 and 32, and the box C that has been boxed can be taken out.
[0027]
FIG. 4 is a perspective view showing another embodiment of the box making machine according to the present invention. In this embodiment, the same reference numerals are given to the same components and portions as those of the embodiment shown in FIGS. 1 to 3, and the detailed description thereof is omitted. As for the box making machine 50, the center part of the top plate part 4 is constituted by a vacuum pad 51 attached to the upper ends of the four columns 9. The four vacuum pads 51 are disposed at the four corners of the central portion, and the blank B is set on the box making machine 50, and then the first side flap b1 and the second side flap b2 of the blank B are bent. The blank B can be stably sucked and held without the operator having to press it down by hand during the folding of the corner flap b3 by the flap folding mechanism 40.
[0028]
In the above-described embodiment, when the side flaps b1 and b2 are folded, the corner flap b3 is lightly pressed from the inside to the outside, and the side flaps b1 and b2 are folded outwards as an example. As described above, when the side flaps b1 and b2 are bent, the corner flap b3 can be folded inward by lightly pushing from the outside to the inside. When it is inwardly folded, the corner flap b3 is located inside the box C, and therefore it is necessary to perform appropriate processing when packing the box. Furthermore, although the semi-automatic box making machine is used in the above embodiment, it can be made fully automatic by using an electric motor or an air cylinder instead of the foot pedal 21.
[0029]
【The invention's effect】
According to this invention, out of the box making process from the blank to the completed box, the blank is set on the box making machine, the completed box is taken out from the box making machine, and the winding portion of the side flap is wound. However, apart from driving by stepping on the box making machine, etc., the bulky and time-consuming work of folding and folding the flap from the blank is automatically performed by the machine. Is done and labor is reduced. If you try to do all the work with the machine, the mechanism becomes complicated and the manufacturing cost of the box making machine rises, but the structure of the box making machine can be simplified by limiting the work done by the machine to folding and folding. Thus, by reducing the manufacturing cost, it is possible to provide a box making machine at a low price that can be introduced even if the number of box making is small. In particular, since the bending guide plate is rotated by a simple mechanism, a beautiful and uniform finish can be given to the box that has been made without requiring a skilled person. The operations required for box making can be given all or almost manually without the use of energy sources such as electricity and compressed air, so no equipment for energy use is required and energy costs are reduced. It can be used at any place without choosing a work place. Furthermore, the box making work has conventionally been labor intensive and time consuming. In particular, for making a highly waterproof blank, it was as fast as one case per minute. With the box machine, it is possible to make 5 cases per minute, which can be made at high speed and high efficiency.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overview of an embodiment of a box making machine according to the present invention.
2 is an enlarged front view showing a part of the box making machine according to the present invention shown in FIG. 1. FIG.
FIG. 3 is a perspective view of the main part showing the middle of a blank box making operation by the box making machine according to the present invention shown in FIG. 1;
FIG. 4 is a perspective view showing another embodiment of the box making machine according to the present invention.
FIG. 5 is a development view showing a blank formed by folding with a box making machine and a box showing a box made from the blank.
[Explanation of symbols]
1,50 Box making machine 2 casters
4 Top plate part 5a Long side 5b Short side
9 Prop
10 1st hole 11 1st bending guide
12 2nd hole 13 2nd bending guide
20 Drive mechanism 21 Foot pedal
22 Lifting table 23 Lifting rod
25 Guide part 26 First roller
28 Second roller 31, 32 Return spring
40 Folding mechanism 41 Arm
42 Folding roller 44 Contact part
45 Push-up body
B Blank C Box
b0 center part b1 first side flap
b2 Second side flap b3 Corner flap
b4 Entrainment part b5 Engagement part

Claims (4)

A side flap having a quadrangular central portion and a flap formed around its four sides, and comprising a pair of first side flaps facing each other and a pair of second side flaps facing each other. It is a box making machine that forms a blank that has corner flaps and is not formed with slits in the crease,
Center support part for supporting a central portion of the blank, raising the folding orthostatic possible the first side flap and disposed outwardly toward the inside of the surrounding four sides of the central support portion for raising folding the side flaps A bending guide comprising a first bending guide and a second bending guide for folding the second side flap , and a drive mechanism for raising the bending guide;
And a flap folding mechanism for folding the corner flaps formed at the four corners of the blank to the adjacent side flaps,
The bending guide is a folding plate that can support the blank in a flat plate state in a standby state before starting to stand up , and the second bending guide is formed in an inclined shape at both ends. And
The drive mechanism includes a roller which is moved up and down below the bending guide and can be rolled and engaged with the bending guide;
The flap folding mechanism includes an arm that is rotatable along the side flap, and a folding roller that is rotatably attached to the tip of the arm and can be engaged with the corner flap.
The box making machine is characterized in that the folding roller is formed in a bowl shape in which the rotation center side is narrowed .   The box making machine according to claim 1, wherein the central support portion is a mounting plate on which the central portion of the blank is mounted.   The box making machine according to claim 1, wherein the central support portion is a vacuum pad that adsorbs the central portion of the blank.   The central support part is formed in a partial region of the top plate of the table, and the drive mechanism is raised and lowered to the table via a foot pedal provided on the lower side of the table, and the foot pedal and the lifting rod. The box making machine according to any one of claims 1 to 3, further comprising a guided lifting platform, wherein the roller is rotatably attached to the lifting platform.

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