JPH0412219B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a box manufacturing method and device, and more specifically, the present invention relates to a box manufacturing method and device, and more specifically, it uses a plate material made of a foamed sheet of thermoplastic resin, and after forming bending grooves and cutting off unnecessary edges. The present invention relates to a method for automatically manufacturing a rectangular box by folding and assembling it, and a manufacturing apparatus used to carry out the method.

<Prior art> Examples of the above-mentioned box manufacturing method or device are disclosed in Japanese Patent Publication No. 53-4876 and Japanese Utility Model Publication No. 53-17352, etc., but all of these are vertical methods that handle board materials in a horizontal state. It is a mold type method, and has drawbacks such as difficulty in smoothly feeding the plate material, and difficulty in retaining and discharging unnecessary edges generated during the box making process.

Therefore, the applicant of the present invention, in order to eliminate the drawbacks of the above-mentioned conventional vertical box manufacturing method or device,
We were the first to develop a horizontal box making device that handles plates in a vertical position (Japanese Patent Application No. 58-171933 or Japanese Patent Application No. 171933).
59-117150).

However, even in the above-mentioned method or apparatus, since the boxes are processed one by one, the efficiency of box manufacturing is not sufficient, and the method or apparatus is not sufficient for rapidly manufacturing boxes in large quantities. In addition, the overall size of the device takes up a considerable amount of space, so there are various problems, such as the need for a large space for the equipment, especially when installing a large number of box making devices for mass production of boxes. Improvements were requested.

<Purpose> Therefore, the purpose of the present invention is to provide a box manufacturing method that solves the problems of the above-mentioned prior art, allows boxes to be manufactured more efficiently, has a compact overall device size, and simplifies the structure. and is trying to develop a device.

<Structure> In order to achieve the above object, the method of the present invention uses a plate made of a thermoplastic resin sheet, holds the plate in a vertical state, forms a bending groove, and removes unnecessary edges. In a box manufacturing method in which the plates are cut out and then pushed into a cylindrical shape and folded and assembled into a box shape, a large number of plates are divided into multiple rows and stored, and an integrally constructed shutter is used to store the plates. ,
One by one from each row, multiple plates are simultaneously fed to the front surface of a cylindrical shape, which has multiple sets of cavities that serve as mold holes lined up in the horizontal direction, and the supplied plates are pushed from the side edges of the entire plate. After moving the plates and positioning them on the front surface of the cylindrical shape so that they are in close contact with each other in the lateral direction, the rear surface of the lug of each plate is attached to the front surface of the cylindrical shape by vacuum suction holes that share at least a part of the vacuum piping route. The plates are held by vacuum suction, and then a horizontally movable heated blade, which is made up of multiple sets in the shape of a parallel cross, is used to form bending grooves on each plate and cut out the edges. The plates, excluding the parts, are pushed into the cylindrical mold using multiple sets of intermediate pressing plates, which are integrally constructed so that they can be moved simultaneously in the horizontal direction, and folded into a box shape. the ears,
It is characterized in that, at the same time as the vacuum suction is released, pressurized air is blown from a blow-off nozzle that shares at least a portion of the air piping route, and is discharged from the cylindrical front surface.

In addition, the device of this invention uses a plate made of a thermoplastic resin sheet, holds the plate in a vertical position, and presses a cross-shaped heated blade against it to form a bending groove and cut off unnecessary edges. In a box-making device that uses an intermediate push plate to push the plates into a cylindrical shape and assemble them into a box shape, the plate supply mechanism is a system in which multiple compartments for vertically storing a large number of plates are moved horizontally. It is installed at intervals, and can be supplied to the front surface of a cylindrical shape with multiple sets of cavities that serve as mold holes lined up horizontally, while each row of plate materials is lined up one by one in the horizontal direction. A fixed stopper for positioning is provided on the cylindrical front surface at a position that abuts one side edge and bottom edge of all the supplied plate materials, and a fixed stopper for positioning is provided on the cylindrical front surface. A widening plate that can be moved toward the plate side is provided at the position where it comes into contact with the plate, and vacuum suction holes are provided at positions corresponding to the rear surfaces of the ears of each plate on the cylindrical front surface. At least a part of the piping route is shared, and multiple sets in the shape of parallel crosses that can be moved horizontally from the front of the cylindrical shape are integrally formed to form bending grooves on each plate and to form ears. A thermal blade is provided for cutting, and each pair of thermal blades has a through-hole for passing through the intermediate pressing plate, and each plate material, excluding the ears, is pushed into each cylinder through each through-hole in the horizontal direction. A plurality of sets of intermediate push plates are arranged in parallel so that they can be moved freely at the same time, and a plurality of pressure air blowing nozzles for removing the ears are installed above the front of the cylinder. It is characterized in that at least a part of the air piping route to these blow-off nozzles is shared.

<Example> Next, an example of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show the entire device, and 1 is a supply mechanism that stores a large number of rectangular plates P made of thermoplastic resin foam sheets such as expanded polystyrene sheets, and sequentially takes them out. It is then supplied to the box-making processing position.

As shown in FIG. 3, the supply mechanism 1 is provided with a hopper 10 in the form of an inclined table, and inside the hopper 10, two partition plates 11 are erected at equal intervals along the inclination direction. The interior of the hopper 10 is divided into three rows of inclined passage-like sections of the same width. A large number of plates are stored vertically along the slope in each passage-like section. Therefore, the three rows of plates P are separated from each other by the partition plates 11,
They are stored side by side with an interval corresponding to the thickness of the partition plate 11.

A shutter 13 is provided above the tip of the hopper 10 and is movable up and down by a cylinder mechanism 12, so that three rows of cutting-edge plates P of the hopper 10 can be simultaneously pushed from above and fed downward to the hopper 10. It's getting old. Reference numeral 14 denotes a guide plate on the front side of the hopper 10, which is erected with a gap between it and the tip of the hopper 10 for the plate material P to fall, and the shutter moves up and down between the guide plate 14 and the hopper 10. Therefore, when the shutter 13 descends and comes to the front of the hopper 10, it comes into contact with the front surface of the most advanced plate material P to close the hopper 10, and when the shutter 13 rises, the space between the front surface of the hopper 10 and the guide plate 14 is closed. A gap is created in the hopper 10, and the most advanced plate P, which has been pushed forward by the weight of the rear plate P and its own weight according to the inclination of the hopper 10, advances into the gap, is pushed down by the shutter 13 from above, and falls downward. will be supplied.

At the bottom of the supply mechanism 1, three bending assembly cylinders 2 are installed side by side in the lateral direction. The cylindrical mold 2 has a cavity with a rectangular cross section that serves as a mold hole, and the plate material P is pushed into the cylindrical mold 2 to perform the bending process. Each cylindrical mold 2 is installed so as to open horizontally, and a vertical flat plate is provided at the tip of the opening.
A holding plate 20 of the plate material P is integrally attached. The holding plate 20 is provided on the same plane as the tip of the hopper 10 of the supplying mechanism 1 and directly below it, and the plate material P dropped from the supplying mechanism 1 is just supplied to the front surface of the holding plate 20.

4 and 5 on the front surface of the holding plate 20.
As shown in the figure, each plate material P is supplied in three rows.
An L-shaped fixed stopper 30 is attached at a position where it abuts on the lower edge of the board, and a fixed stopper 31 is also attached at a position where it abuts on the left side of each plate P as a whole. Further, at a position corresponding to the vicinity of the right end of the entire plate material P, a width shifting plate 33 is installed which is movable in the horizontal direction by a cylinder mechanism 32, and the width adjusting plate 33 is provided with a gap between each other. Three rows of plate materials P are pushed toward the left stopper 31 side by this width adjusting plate 33, and the gaps between the plate materials P are closed and arranged closely. In addition, 34 is a guide piece, which is attached at a position corresponding to the left and right ends of the entire plate P in the middle of the falling path of the plate P, so that the plate P can be reliably fed and arranged at a predetermined position on the holding plate 20. ing.

Next, in the holding plate 20, vacuum suction holes 40 are opened at positions corresponding to the four corners of each plate material P, so that the four corners of the plate material P can be sucked and held and fixed. Vacuum suction hole is vacuum piping 41
via a suitable vacuum source (not shown).

Next, in front of the holding plate 20, a cross-shaped thermal blade 50 is provided which is movable in the horizontal direction by a cylinder mechanism 51. The hot blade 50 presses against the plate material P to melt and form a bending groove, and also melts and cuts off the edges e at the four corners of the plate material P that are unnecessary for box making. In the case of the example, FIGS. 6 and 7
As shown in the figure, three sets of thermal blades 50 corresponding to three rows of plate materials P are integrally formed and attached to a mounting plate 52, and this mounting plate 52 is attached to a cylinder mechanism 51. Note that a cartridge heater 53 for heating is embedded in the center of each thermal blade 50. In addition, in the thermal blade 50, the square frame portion at the center of the square shape forms a bending groove in the plate material P,
The outwardly extending portion of the square frame portion cuts the ear portion e. Further, 54 is a through hole for passage of an intermediate pressing plate, which will be described later, and is formed in a rectangular shape through the center of each cross-shaped thermal blade 50.

Reference numeral 60 denotes an intermediate push plate, which is provided so as to be movable in the horizontal direction by a cylinder mechanism 61.
0 to the center of each plate material P and pushing it into the cylindrical mold 2, the plate materials P are bent and assembled. Note that three intermediate pressing plates 60 are integrally attached to each row of plate materials P, and are moved simultaneously by one cylinder mechanism 61. Further, the intermediate pressing plate 60 moves from the back side of the hot blade 50 to the front side of the cylindrical mold 2 through the passage hole 54 formed in the mounting plate 52 of the hot blade 50.

Next, 70 is a blow-off nozzle of pressurized air for removing the ear part e, and as shown in FIG. 8 and FIG. Pressurized air is blown down along the holding plate 20 to eliminate unnecessary ears e. The blow nozzles 70 are arranged horizontally in three
For the plate material P in the row, both left and right ends and each plate material P
A total of four blow-off nozzles 70 are provided at intermediate positions. That is, in the case of three plates P, six nozzles 70 may be installed in the horizontal direction since the ears e are formed at both left and right ends of each plate. By sharing the four nozzles 70, it becomes possible to carry out the process using only four nozzles 70.

Furthermore, 80 is a guide plate for taking out the box,
It is provided at the rear of the cylindrical mold 2, and the box which has been bent and assembled and discharged from the rear of the cylindrical mold 2 is received and collected on this guide plate.

Next, a box manufacturing method using the box manufacturing apparatus described above will be described.

First, the plate materials P are cut in advance into rectangular shapes with predetermined dimensions to match the dimensions of the box, and are stored vertically in each storage section of the hopper 10 in order. Then, by raising and lowering the shutter 13, three of the plates P in the front row of the three rows of storage compartments are simultaneously pushed and dropped downward, and are supplied to the front surface of the holding plate 20 of the cylindrical shape 2. .

In the holding plate 20, the lower edge and left edge of each plate material P are brought into contact with the fixed stoppers 30 and 31, and the width shifting plate 33 is moved toward the stopper 31 side to form a gap between the three plate materials P. The gaps are closed so that each plate material P is closely spaced in the lateral direction and accurately placed at a predetermined box-making work position.

Then, at this position, vacuum suction by the vacuum suction holes 40 is applied to suction and fix the plate material P.

Furthermore, the intermediate push plate 60 is advanced toward the cylindrical mold 2 side,
Lightly abut the plate P to securely fix the plate P.

In this state, the hot blade 50 is advanced toward the cylindrical mold 2 side, brought into contact with the plate material P, and the bending groove is thermally melted and the edge portion e is melted and cut.

After the hot blade 50 retreats, the intermediate pushing plate 60 further moves forward and pushes the central portion of the plate material P excluding the cut ear portion e into the inside of the cylindrical mold 2. Then, the plate material P is bent from the bending groove along the inner wall of the cylindrical mold 2, and is formed into a rectangular box shape. The manufactured box is discharged from the rear of the cylindrical mold 2 onto the guide plate 80 and collected.

Then, the ears e remaining on the holding plate 20 are held by releasing the vacuum suction by the suction holes and simultaneously blowing down pressurized air from the pressure air blowing nozzle 70 for removing the ears. The lower part of the plate 20 is blown away and removed.

In this way, one cycle of the box-making process is completed, and by supplying a new plate material P from the supply mechanism 1 to the front surface of the holding plate 20 again, the next box-making process can proceed continuously.

Among the box manufacturing methods and devices described above, the plate material P used is not only a single foam sheet, but also a foam sheet laminated with non-foamed thermoplastic resin film, paper, metal foil, etc. on one or both sides of the foam sheet. It can also be done with things.

As shown in the figure, the supply mechanism 1 is one in which a plate material P is stored vertically in an inclined hopper 10, and the shutter 1 is automatically moved by the weight of the plate material P.
In addition to being convenient in that it can be moved to the third side, since the plate material P is stored in a vertical state, the plate material P can be supplied only by raising and lowering the shutter 13, and the structure of the entire supply mechanism 1 can be simplified. But it is suitable. However, as the supply mechanism 1, the plate material P
If the material P can be vertically fed to the front surface of the holding plate 20 of the cylindrical shape 2, the material P may be stacked horizontally in the hopper 10, and the material P may be turned vertically using a conveyance means and then fed. , any usual feeding mechanism for various plate-like objects can be freely adopted.

In addition, the cylindrical shape 2, the hot blade 50 or the intermediate pressing plate 60
The structure is not limited to that shown in the diagram,
The present invention can be freely implemented using any device used in a normal box making device, and the operating mechanism for each of the above members may be a cylinder mechanism or a combination of known mechanisms such as a crank mechanism or a link mechanism.

Next, each stopper 30 provided on the holding plate 20,
The shape or arrangement of the guide plate 31 and the guide plate 34 may be such that they can be placed in a position other than the one shown in the figure or shaped as long as they can be in contact with the left and right ends and lower ends of the plurality of plates P and can be guided smoothly or accurately positioned. can also be changed.

Further, in the illustrated embodiment, the apparatus and method for simultaneously manufacturing three plates P have been described, but it is also possible to simultaneously supply only two or three or more plates P to form a box. This method can be easily carried out, and the number of structural members such as the supply mechanism 1 and the cylindrical mold 2 can be increased as appropriate depending on the number of plates P to be manufactured at the same time.

<Effects> According to the box-making method of the present invention configured as described above, by simultaneously forming a plurality of plates P, the processing efficiency can be greatly increased, and the equipment itself can be reduced. The structure can be simplified,
The device cost and installation space can be significantly reduced.

That is, a large number of plate materials P are divided and stored in multiple rows, one plate is taken out from each row of the plate materials P at the same time, and the plurality of plates P are supplied to a box-making processing position while being lined up in the horizontal direction. By simultaneously performing processing on a plurality of plates P placed side by side, the structure of each operating member, mechanism, etc. can be shared.

Specifically, the shutter 1 in the supply mechanism 1
3 and the cylinder mechanism 12, the mounting members for the thermal blade 50 and the intermediate push plate 60, and the cylinder mechanisms 51 and 61 for operation can be shared by one unit for multiple plates P, and the piping for vacuum suction and pressure air is also provided. There is no need to provide separate piping for each plate material P, and it is sufficient to branch from a common piping, so piping equipment can be reduced.

Therefore, even though a plurality of plates P are made into a box,
The cost required for operation is not so high compared to conventional methods and equipment that process only a single plate material P, and the cost of manufactured boxes is reduced due to the advantage of several times higher work efficiency. It will be much cheaper than conventional ones.

In particular, in the supply mechanism 1, multiple rows of plate materials P
are stored at intervals to ensure that the plates P in each row do not get caught with each other and cause feeding defects, and that smooth feeding is possible without clogging. After being supplied to the box manufacturing position, the width shifting plate 33 that contacts the end of the entire plate material P is pushed to close the gap between the plate materials P, and the plate materials P are brought into close contact with each other in the lateral direction. Since the box-making process is performed after placing the plates in the box, it is possible to accurately position the plates P with respect to the box-making mechanism such as the cylindrical type 2. Furthermore, instead of positioning multiple plates P individually, the entire plate P arranged in a row can be processed into one at the same time. Since positioning can be performed using the two width shifting plates 33, positioning work can be performed efficiently and quickly.

Moreover, since each plate material P is closely arranged, there is no need to provide unnecessary gaps between the box forming mechanisms such as the cylindrical mold 2 and the hot blade 50, and the equipment space can be used most effectively to achieve high They can be arranged densely, and can be highly effective in downsizing the device and reducing equipment costs.

As described above, not only can multiple plate materials P be made into boxes at the same time, but it also has excellent effects such as simplifying the manufacturing equipment and work process, and is helping to reduce costs and increase demand for assembled boxes made from foam sheets. This is an excellent invention that can also make a contribution.

[Brief explanation of drawings]

The figure shows an embodiment of the invention.
The figure is a plan view of the entire device, Figure 2 is a front view, Figure 3 is a perspective view of main parts near the supply mechanism and holding plate, and Figure 4 is a front view of the entire device.
The figure is a front view showing the positioning and holding mechanism for the plate near the holding plate, Figure 5 is a partially cutaway side view, Figure 6 is an enlarged perspective view of the thermal blade, and Figure 7 is a view from the back side of the previous figure. A perspective view, FIG. 8 is a front view showing a mechanism for removing the ears in the vicinity of the holding plate, and FIG. 9 is a partially cutaway side view. 1... Supply mechanism, 10... Hopper, 11...
Partition plate, 13... Shutter, 2... Cylindrical, 2
0... Holding plate, 30, 31... Stopper, 33
...Width gathering board, 40...Vacuum suction hole, 50...Heat blade, 60...Medium push plate, 70...Blowout nozzle,
P...Plate material, e...Ear part.

Claims (1)

[Claims] 1. Using a plate made of a thermoplastic resin sheet, hold the plate in a vertical position, form a bending groove and cut off unnecessary edges, and then push the plate into a cylindrical mold. In the box manufacturing method, which involves folding and assembling into a box shape,
A large number of board materials are divided into multiple rows and stored, and an integrally constructed shutter is used to simultaneously remove multiple board materials, one from each row, horizontally into multiple cavities that will serve as mold holes. A plurality of plate materials are supplied to the cylindrical front surface arranged side by side, and the supplied plurality of plate materials are pushed from the side edges of the entire plate material and positioned on the cylindrical front surface in close contact with each other in the lateral direction. The back side is vacuum-adsorbed by vacuum suction holes provided in the cylindrical front surface and at least a part of the vacuum piping route is shared, and the plate material is suctioned and held. A plurality of sets of integrally formed thermal blades are used to form bending grooves and remove ears on each plate material using an integrally formed thermal blade, and the plates excluding the ears can be moved simultaneously in the horizontal direction. It is pushed into the cylindrical mold using an intermediate press plate and bent into a box shape, and the ears remaining on the front surface of the cylindrical mold are removed from the vacuum suction, and at the same time, a blowing nozzle that shares at least a part of the air piping route is formed. A box manufacturing method characterized by blowing pressurized air and expelling it from the front of the cylindrical shape. 2 Using a plate made of a thermoplastic resin sheet, hold the plate in a vertical position, press a cross-shaped hot blade against it to form a bending groove and cut off unnecessary edges, and then press the plate with a medium press plate. In a box-making device that assembles a box by pushing it into a cylindrical shape and folding it into a box shape, the board supply mechanism consists of multiple rows of compartments that store a large number of boards vertically, spaced apart horizontally. ,
An integrally constructed shutter is installed that can simultaneously supply each row of plate materials, one by one, side by side, to the front surface of a cylindrical shape in which multiple sets of cavities, which serve as mold holes, are arranged horizontally. A fixed stopper for positioning is provided on the cylindrical front surface at a position where it abuts one side edge and a bottom edge of all the plate materials supplied, and a position where the plate material abuts against the remaining one side edge. A width shifting plate that can be moved to the side is provided, and vacuum suction holes are provided at positions corresponding to the rear sides of the ears of each plate on the front surface of the cylindrical shape, and at least part of the vacuum piping route to these vacuum suction holes is provided. In addition, multiple sets in the shape of parallel crosses are integrally formed and can be moved horizontally from the front of the cylindrical shape, and each plate is equipped with a thermal blade for forming bending grooves and cutting off ears. ,
Each pair of thermal blades has a through-hole for passing the intermediate pressing plate, and each plate material, excluding the ears, is pushed into each cylindrical mold through each through-hole, and the blades are integrated so that they can be moved simultaneously in the horizontal direction. A plurality of sets of intermediate pressing plates configured as shown in FIG. A box making device characterized in that at least a part of the box making device is shared.