JP2003103656A - Box-making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box-making machine which folds a side flap by rotatably operating a guide plate as a part of a portion for sharing the support of a blank in a waiting state and which has a simple structure and an easy box- making work. SOLUTION: The box-making machine comprises a first roller 26 and a second roller 28 raising from below in a state in which the rollers are placed on an elevation base 22, rotating and standing a first folding guide 11, and a second folding guide 13 toward an inside while the rollers 26 and 28 are respectively rolled and engaged with the first guide 11 and the second guide 13. The side flaps b1, b2 of the blank supported in a flat plate state without inner die are smoothly folded up to manufacture the case. Corner flaps b3, b4 folded out are superposed on the side flap b2 by a folding mechanism 40 having folding rollers 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-making machine for forming a blank set on a supporting portion into a box by folding flaps formed around the blank.

[0002]

2. Description of the Related Art Conventionally, a wide variety of box-making machines have been proposed for forming a box by folding or bending a sheet-like blank. A structure in which a blank is bent is well known. In general, a box-making machine using a medium-sized one has a complicated bending mechanism, which increases the manufacturing cost of the can-making machine. Therefore, it is practically impossible to introduce such a box making machine when assembling and using a small number of boxes at the boxing work site, and it is almost forced to manually make the boxes.

However, the work efficiency is poor in complete manual work, and it is difficult to bend or fold a blank such as a waterproof blank having high rigidity and high strength, which causes a heavy work load. Further, in general, box making work involves folding flaps and winding work, but making a box on a desk or in the air is a difficult task that requires a skilled person who is familiar with procedures and techniques. In addition, the finished state was not uniform and unbalanced depending on the worker or even the same worker lot by lot.

[0004]

In a box-making machine for forming a box by folding or folding a blank, a guide plate for folding or folding the flap is generally rotated to rotate the flap. Although it is folded, a complicated mechanism such as a link mechanism is required to cause the guide plate to perform such an operation, which also raises the manufacturing cost of the box making machine. Therefore, there is a problem to be solved in that the box-making work is performed by rotating the guide plate by a simple mechanism without using a medium-sized machine, and the box-making machine structure is simplified.

An object of the present invention is to rotate the guide plate for bending the side flaps by a simple mechanism so that a clean and uniform finish can be given without requiring an expert, and the box can be manufactured. An object of the present invention is to provide a can-making machine that can be manufactured at low cost so that even a small number can be introduced.

[0006]

In order to solve the above-mentioned problems, a box-making machine according to the present invention has a central support portion for supporting a central portion of a blank, and a side formed outside the central portion of the blank. The folding guide is provided with folding guides that are arranged outside the four sides of the center support portion to fold up the section flaps and that can stand up inward, and a drive mechanism that raises the folding guides. Is a bending plate that can support the blank in a flat plate state by being shared with the central support portion in the standby state before the start of standing, and the drive mechanism is moved up and down below the bending guide to move to the bending guide. It is configured by including a roller capable of rolling engagement.

According to this box making machine, the blank is first
The central portion is supported by the central supporting portion of the box making machine. In the standby state before the start of folding, the side flaps formed on the outside of the central portion of the blank are supported by the folding guides in a prone position, a part of which is located around the central supporting portion. To be done. Therefore, the blank is supported in the flat plate state, with the central portion and the side flaps being shared by the central support portion and the bending guide, respectively. Next, by actuating the drive mechanism, the roller rising below the folding guide roll-engages with the folding guide, and the folding guides arranged on the outer sides of the four sides of the central support portion are directed inward. To stand up. The upright folding guide is formed by bending the side flaps upward around the center. The simple upward movement of the roller is smoothly converted into the rotation of the folding guide by utilizing the rolling of the roller. The bending of the side flaps around the four sides of the central portion is performed by collectively bending the side flaps without moving the main body (central portion) of the blank and without using the medium size.

By using the folding guide as the folding plate, the folding plate pushes the flap in a plane and bends it, and a stable and reliable folding action can be produced. The folding plate does not necessarily have to have the same shape, but can be a guide plate formed in a shape corresponding to the shape of the side flap. In addition, by using a roller that moves up and down below the folding guide as the means for raising the folding guide inward, the roller is engaged with the folding guide while rolling, and how Even if it is upright, it will make rolling contact with the bending guide. Therefore, the frictional resistance generated between them is extremely small, and the bending operation of the side flaps is very light and smooth, and the power required for the drive mechanism is small. It is preferable to apply an urging force to the bending guide in the direction of returning to the standby state before standing by the return spring. Since the bending guide is constantly pressed against the roller by the urging force of the return spring, the operation is stable. Further, when the operation of the drive mechanism is returned, the bending guide automatically returns to the standby state by following the descending roller by the spring force of the return spring.

In this box making machine, the central support portion is
A vacuum pad that adsorbs the central portion of the blank can be used. By sucking the central part of the blank with a vacuum pad, positioning of the blank in the box making machine is secured, and also when the folding guide stands up toward the inside and the side flaps are folded up, The lifting of the blank from the central support, which causes it to fail, is prevented. Alternatively, in this box making machine, the central supporting portion may be a mounting plate on which the central portion of the blank is mounted. When the mounting plate is used, no suction equipment is 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 have to be a medium size in order to prevent the blank from rising from the center support part, but hold the blank on the center support part with some weight such as manual work or pressing. It is preferable to attach it.

In a box making machine equipped with the above drive mechanism,
The central support portion is formed in a partial area of the tabletop,
The drive mechanism includes a foot pedal provided on the lower side of the table, and an elevating table guided up and down by the table via the foot pedal and an elevating rod, and the roller is rotatably attached to the elevating table. Can be configured. By providing the drive mechanism with a foot pedal, it is possible to operate the box making machine in an extremely energy-saving manner even in a boxing site where equipment such as electricity or a pressure source is not nearby. When the foot pedal is stepped on, the lifting rod rises, and the rollers also rise together with the lifting platform. Since the lifting table is guided by the table, the lifting position of the roller attached to the lifting table is stable, and the operation timing of the folding guide is also stable.

Further, this box making machine is provided with a flap folding mechanism for folding the corner flaps formed at the four corners of the blank onto the adjacent side flaps, and the flap folding mechanism comprises the side flaps. The arm may be rotatable along the flap, and the folding roller may be rotatably attached to the tip of the arm and may be engaged with the corner flap. When the corner flaps formed at the four corners of the blank are folded out of the box, they need to be folded over the side flaps already folded. The flap folding mechanism includes an arm rotatable along the side flaps and a folding roller rotatably attached to the tip of the arm and engageable with the corner flaps. When pivoting along the side flaps, folding rollers rotatably attached to the tip of the arm move to stroke the corner flaps to fold the corner flaps over the side flaps. The folded corner flaps can then be maintained in a state of being overlaid on the side flaps by, for example, rolling and engaging utilizing a fold or wrap that follows the side flaps.

In the box making machine provided with the flap folding mechanism, the folding roller can be formed in a bowl shape with a narrowed rotation center side. Assuming that the corner flaps are folded, the corner flaps bulge outward as they approach the side flaps. If the folding roller is a simple cylinder,
When the folding roller rotates together with the arm, the edge of the folding roller, which intersects with the bottom surface of the folding roller on the side of the center of rotation having a small turning radius and the cylindrical surface, scratches the corner flap bulging outward. May be attached. Therefore, by forming the folding roller into a bowl shape with the rotation center side narrowed, the bowl-shaped curved surface portion of the folding roller comes into contact with the bulging portion of the corner flap in a pre-retracted manner. Prevents scratches.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a box making machine according to the present invention will be described below with reference to the drawings. Before describing the box making machine, the blank B to be box-made will be described with reference to FIG. FIG. 5A is a developed plan view of a blank to be box-formed, and FIG. 5B is a front view of the box obtained by box-making the blank. The blank B may be, for example, a cardboard material such as a corrugated cardboard having a developed shape shown in FIG. The blank B has a rectangular central portion b0 and flaps formed around the four sides thereof, and the flap is the first side flap b along the long side.
1, a second side flap b2 along the short side, and a corner flap b3. The second side flap b2 is provided with a folded-back 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 thereof. The corner flap b3 is formed with an engaging portion b6 that engages when the winding portion b5 is wound in such a manner as to protrude laterally.

The blank B shown in FIG. 5A is the box making machine 1.
In the box C formed by bending by, the corner flap b3 is folded outward and then folded on the second side flap b2, as shown in FIG. During box making, the folded-back portion b4 connected to the outside of the second side flap b2
Is further stacked on the corner flap b3 folded back to the outside and folded on the second side flap b2. A winding portion b5 is formed in a protruding shape further outside the folded-back portion b4, and the winding portion b5 is manually attached to the second side flap b.
The shape of the box C is maintained by being wound inside the engaging portion b6 that is overlapped with 2. Ordinary blanks are made easier to fold by forming slits in the folds, but since water-resistant blanks do not have slits as part of preventing water leakage, it is best to fold or fold them. Have difficulty. Box making machine 1 according to the present invention
Can be made from any blank.

FIG. 1 is a perspective view showing an overview of an embodiment of a box making machine according to the present invention. FIG. 2 is an enlarged front view of a part of the box making machine according to the present invention shown in FIG. 1, and FIG. 3 is a schematic view showing a 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, a 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 the top plate portion 4 is
The central support part 5 supports the central part b0 of the blank B at the center, a margin part 6 around the central support part 5, and a bridge part 7 connecting the central support part 5 and the margin part 6. In this example, the central support portion 5 is a mounting plate supported by the bottom frame 3a by four columns 9, and serves as a partial area of the top plate portion 4 of the table, and the central portion b0 of the blank B.
Is for loading. Each column 9 also functions as a guide for a drive mechanism 20 described later.

In order to manufacture the box C by bending the above blank B, various bending guides for box making are arranged between the central support portion 5 of the box making machine 1 and the margin portion 6 around it. A rectangular hole for installation is formed. That is, the first holes 1 formed on the outer sides of the long sides 5a, 5a of the central support portion 5
0 and 10 are provided with first folding guides 11 and 11 for folding the first side flap b1 of the blank B, which are formed outside the short sides 5b and 5b of the central portion support 5. Second bending guides 13, 1 for bending the second side flap b2 of the blank B are provided in the second holes 12, 12.
3 are provided. Each of the first folding guides 11 and each of the second folding guides 13 are rotatably connected to the long side 5a or the short side 5b of the central support portion 5 by hinges 14 and 14 (see FIG. 2). ing.

Each first folding guide 11 comprises 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 has a shape. Made of slanted plates at both ends. The height of the side flaps b1 and b2 is normally set to the folding guides 11 and 13.
Is higher than. Any folding guide 11, 1
In the standby state before being erected by the drive mechanism 20 which will be described later, the surface 3 that is in contact with the blank B is also maintained in a level height and posture that is flush with the surface of the mounting plate that is the central support portion 5. , The first side flap b1 and the second side flap b
It is possible to support a part of 2 and. In order to keep the both folding guides 11 and 13 flush with the central portion support 5 in the standby state, an appropriate stopper can be provided on the top plate portion 4.
Further, by determining the lowering position of the drive mechanism 20 which will be described later, it is also possible to restrict both the folding guides 11 and 13 from further rotating downward from the flush state.

The drive mechanism 20 includes a foot pedal 21 provided under the table, a lift table 22 which is vertically guided by the column 9, and an upper end portion and a lower end portion of which are rotated by the lift table 22 and the foot pedal 21, respectively. The lifting rod 23 is connected. By providing the drive mechanism 20 with the foot pedal 21, the box making machine 1 can be moved in an extremely energy-saving manner even when there is no drive equipment such as a pressure source such as electricity or high-pressure air 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 of the foot pedal 21.
2, 2 is guided by a guide portion 25 slidable with respect to the support column 9. Therefore, when the foot pedal 21 is depressed, the lift base 22 is stably moved up and down while being guided by the guide portion 25 via the lift rod 23, and the bending guides 11 and 13 are also stably operated.

FIG. 2 shows the first bending guide 1 on the left half.
The mechanism for actuating 1 and the second on the right half
The mechanism for actuating the folding guide 13 is selectively illustrated. Further, both mechanisms are shown in a perspective view in FIG. Referring to FIGS. 2 and 3, two first rollers 26, 26 are rotatably supported on the elevating table 22 below each folding guide 11. More specifically, both first rollers 26, 26 are attached to a common support shaft 30, and the support shaft 30 is rotatably supported by the elevators 22 by brackets 27, 27. Also,
Below each bending guide 13, one second roller 28 is rotatably supported by the lifting table 22 via a bracket 29.

A return spring 31 is provided between the first bending guide 11 and the lifting table 22, and a return spring 32 is provided between the second bending guide 13 and the lifting table 22. The return springs 31 and 32 are bent guides 11 and 13 respectively.
Is urged to return to the standby state before standing. 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. In addition, the return springs 31, 32
Keep the folding guides 11 and 13 in the roller 2
Since it is pressed against 6, 28, bending guides 11, 1
3 always follows the rollers 26, 28 and operates stably without blind movement. In this example, the return spring 3
Tension springs are used for 1 and 32.

As shown in FIG. 3 (a), when the lift table 22 is raised, the first rollers 26, 26 are moved by the first bending guides 11 respectively.
On the back surface of the second folding guide 1
3 is engaged with the back surface of the roller 3 while rolling, and the first and second bending guides 11 and 13 (hereinafter abbreviated as bending guides 11 and 13) are rotated about the axes of the hinges 14,
Stand up inside. While the folding guides 11 and 13 are being raised, the rollers 26 and 28 may be raised at any raising angle.
And the bending guides 11 and 13 make rolling contact, not sliding contact, so that the rollers 26 and 28 and the bending guide 1
The frictional resistance generated between the side flaps 1 and 13 is extremely small, the bending 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.

The corner flaps b3 formed at the four corners of the blank B are folded outside the box C when the side flaps b1 and b2 are folded. In order to ensure the outward protrusion, it is preferable to provide a means for gently pushing the corner flap b3 that has started to stand up from the inside. The corner flap b3 folded outward is an obstacle as it is, so it is necessary to fold the corner flap b3 over the already-folded side flap (in this case, the second side flap b2). Therefore, the box making machine 1 is provided with a flap folding mechanism 40 for folding the corner flap b3 on the adjacent second side flap b2. Flap folding mechanism 40
Is an arm 4 rotatable along the second side flap b2.
1 and a folding roller 42 rotatably attached to the tip of the arm 41 and engageable with the corner flap b3. The arm 41 can be, for example, a bending arm rotatably attached to the lower surface side of the top plate portion 4 of the table by a pivotal attachment portion 43. At the bending position of the arm 41, the lift table 22 is operated by the operation of the drive mechanism 20.
Is formed, a contact portion 44 is formed that abuts on the push-up body 45 provided on the lift table 22. By adjusting the height of the push-up body 45, the timing at which the push-up body 45 contacts the contact portion 44, that is, the folding roller 42
It is possible to adjust the folding operation timing of the corner flap b3 by the above so as to be after the completion of bending of the second side flap b2. A return spring that returns the folding roller 42 to the return position can be provided.

As shown in FIG. 3 (b), the operation of the drive mechanism 20 raises the lifting table 22, and the bending guides 11,
After the first side flap b1 and the second side flap b2 are bent by 13 respectively, the push-up body 45 on the lift table 22 is pushed.
The contact of the arm with the contact portion 44 of the arm 41 starts the operation of the flap folding mechanism 40. With the further elevation of the lifting platform 22, the first roller 26 and the second roller 28 only move while rolling on the back surfaces of the folding guides 11 and 13 that have already stood up to the vertical state, but in the flap folding mechanism 40, , 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 the corner flap b3 while stroking the corner flap b3. The part flap b3 is folded over the second side flap b2. After that, a folded-back portion b4 which is continuous with the second side flap b2 and is folded back to the outside, a winding portion b5 formed at the tip of the folded-back portion b4, and a winding portion b6 which is formed continuously with the corner flap b3. The engagement allows self-maintenance in the state of being superposed on 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 bonding or stapling.

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. Generally, the corner flap b3 has a central portion b0 and a first side flap b1.
Further, the closer to the intersection where the second side flaps b1 intersect with each other, the more difficult it is to bend due to the plate thickness, and the more it bulges outward. Therefore, if the folding roller 42 has a simple cylindrical structure, when the folding roller 42 rotates while contacting the corner flap b3, the circular ridge line portion where the bottom surface of the cylindrical shape and the cylindrical surface intersect with the cylindrical surface is formed. The corner flap b3 may be damaged. Therefore, the folding roller 42 is formed in a bowl shape with the rotation center side narrowed, so that the corner flap b3 has a bowl shape 36.
The previously retracted curved surface portions of 3 contact with each other, and the corner flap b3 is prevented from being scratched.

Since the box making machine 1 has the form of a moving table provided with the casters 2, the box making machine 1 can be freely moved and can be moved to a place where packing is requested at any time. Even if the number of lots to be boxed is small, boxes C can be produced from blanks B on the spot and immediately boxed.

The box making work procedure by the box making machine 1 is as follows. First, in the blank B, for example, the central support portion 5 in which the central portion b0 serving as the bottom plate portion is in the shape of the mounting plate of the box making machine 1 is formed.
It is placed on top of and set. When pressing the foot pedal 21 of the drive mechanism 20 while pressing the central portion b0 of the blank B against the central support portion 5 with both hands and pressing it against the top plate portion 4 of the table, an elevating rod 23 connected to the foot pedal 21 is provided. The elevating table 22 rises through the. Return spring 3
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 first and the second side flaps of the blank B. b
Bend the first and second side flaps b2 upward. The lift table 22 further rises, and the push-up body 45 provided on the lift table 22 rotates the arm 41 of the flap folding mechanism 40, so that the folding roller 42 moves the blank B.
Engage the corner flaps b3 formed at the four corners of
The corner flap b3 can be folded over the second side flap b2 in a folded state. Second side flap b2
The shape of the box C is maintained by manually winding the winding portion b5 of the above into the engagement portion b6. By releasing the depression of the foot pedal 21, the return spring 3
By the spring force of 1, 32, the folding guides 11, 12 are returned to their original positions, and the box C manufactured can be taken out.

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 parts as those of the embodiment shown in FIGS. 1 to 3, and detailed description thereof will be omitted again. The box-making machine 50 has a vacuum pad 51 attached to the upper ends of the four columns 9 at the center of the top plate 4. The four vacuum pads 51 are arranged at the four corners of the central part, and set the blank B on the box making machine 50, and then bend the first side flap b1 and the second side flap b2 of the blank B. , And the corner flap b by the flap folding mechanism 40.
The blank B can be stably suction-held without the need for the worker to press it by hand during each of the folding operations of 3.

In the above embodiment, the side flaps b
When bending the side flaps b1 and b2, the corner flaps b3 are gently pushed from the inside to the outside when the side flaps b1 and b2 are bent.
Although it was explained as an example of an outer fold that was folded outward,
When bending the side flaps b1 and b2, the corner flap b3 can be folded inward by lightly pushing from the outside to the inside. In the case of inward folding, the corner flap b3 is located inside the box C.
Appropriate processing is required. Further, in the above-described embodiment, the semi-automatic box making machine is used, but by using the electric motor or the air cylinder instead of the foot pedal 21,
It can also be fully automatic.

[0029]

According to the present invention, in 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 side flaps are wound. It is necessary to perform the work such as winding the winding part by hand, but apart from driving by stepping on the box making machine, etc., the bulky and laborious work of bending and folding the flap from the blank This is done automatically by the machine, reducing the labor. If you try to do all the work with a machine, the mechanism will be complicated and the manufacturing cost of the box making machine will increase, but the structure of the box making machine can be simplified by limiting the bending and folding work to be done by the machine. By reducing the manufacturing cost in this way, it is possible to provide a box making machine at a low price that can be introduced even if the number of boxes is small. In particular, since the folding guide plate is rotatably operated by a simple mechanism, it is possible to give a beautiful and uniform finish to the box that is manufactured without requiring a skilled person. Since the operation required for box making can be given entirely or almost manually without using an energy source such as electricity or compressed air, equipment for energy use is not required and energy costs are suppressed. It can be used anywhere without choosing a work place. Furthermore,
The box making work has conventionally required labor and time, and in order to make a particularly waterproof blank, for example, it took only 1 case in 1 minute. However, the box making machine according to the present invention With this, it is possible to make 5 cases in 1 minute, and it is possible to make boxes at high speed and with high efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overview of an embodiment of a box making machine according to the present invention.

FIG. 2 is an enlarged front view showing a part of the box making machine according to the present invention shown in FIG.

FIG. 3 is a perspective view of essential parts showing 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 made from the blank.

[Explanation of symbols]

1,50 Box making machine 2 Casters 4 Top plate 5a Long side 5b
Short side 9 Strut 10 First hole 11 First bending guide 12 Second hole 13 Second bending guide 20 Drive mechanism 21 Foot pedal 22 Elevating table 23 Elevating rod 25 Guide part 26 First roller 28 Second roller 31, 32 Return spring 40 Folding mechanism 41 Arm 42 Folding roller 44 Abutting part 45 Pusher B Blank C Box b0 Central part b1 1st side flap b2 2nd side flap b3 Corner flap b4 Winding part b5 Engagement part

Claims (6)

[Claims] 1. A central support portion for supporting the central portion of the blank, a side flap formed outside the central portion of the blank for folding up side flaps, and arranged outside four sides of the central support portion. It is provided with a bending guide that can be erected inward, and a drive mechanism that erects the bending guide, and the bending guide shares the blank with the central support portion in a standby state before the start of standing. A box making machine comprising a folding plate that can be supported in a state, and the drive mechanism includes a roller that is vertically moved below the folding guide and is rollably engageable with the folding guide. 2. The center support part is a mounting plate on which the center part of the blank is mounted.
Box making machine described in. 3. 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. 4. The center support portion is formed in a partial region of a top plate of a table, and the drive mechanism includes a foot pedal provided under the table, and the foot pedal and an elevating rod. The box making machine according to any one of claims 1 to 3, further comprising: an elevator table that is vertically guided to the table, and the roller is rotatably attached to the elevator table. 5. A flap folding mechanism is provided for folding the corner flaps formed at the four corners of the blank onto the adjacent side flaps, and the flap folding mechanism rotates along the side flaps. Movable arm,
The box making machine according to any one of claims 1 to 4, further comprising: a folding roller rotatably attached to a tip portion of the arm and engageable with the corner flap. 6. The box making machine according to claim 5, wherein the folding roller is formed in a bowl shape having a narrowed rotation center side.