JPH0780263B2 - Box making equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a box-making apparatus, and more specifically, a bent groove is formed on a single plate made of a thermoplastic resin sheet set in a tubular shape. Further, the present invention relates to a box making apparatus for melting the ears at the four corners and thereafter pushing the single plate into a tubular shape to fold and assemble it into a box shape.

<Prior Art> Conventionally, using a single plate made of a thermoplastic resin sheet,
As a box-making device for automatically manufacturing a rectangular box in which the side plates are bent and erected around the bottom plate, a so-called horizontal arrangement of a frame-shaped tube type, a cross-shaped forming die, and a rectangular pressing die is provided. Vertical type (for example, Japanese Examined Patent Publication No. 53-4876, Japanese Utility Model Sho 53)
-17352).

According to the above box-making apparatus, a V-shaped bent groove is pressed on a single plate by pressing a heated molding die against a rectangular single plate made of a thermoplastic resin sheet along one side of the cylinder. At the same time, the unnecessary ears can be melted and cut,
After that, the desired box can be formed by pushing the single plate into the inside of the tubular mold and bending it with a pressing die that has advanced from the hollow portion of the forming die.

Further, in this type of box making apparatus, in order to prevent the melted and cut ears from adhering to the molding die, there is provided a clamping means for pressing and clamping the single plate ears into a tubular shape. There is provided an ear portion removing means for removing, from the cylindrical mold, an unnecessary ear portion that has been melted and cut by the molding die. As means for removing the ears, there are employed means that blows off with an air blow, and means that pushes out with an air cylinder.

<Problems to be Solved by the Invention> According to the box-making apparatus having the above configuration, the single plate is clamped and the ear portion is removed separately by the clamp means and the ear portion removing means, respectively. There was a problem that its structure became complicated. There is also a problem that the ear portion cannot be reliably removed by the ear portion removing means due to so-called stringing that occurs on the melted surface of the ear portion.

<Objects of the Invention> The present invention has been made in view of the above problems, and it is possible to use both the ear clamp means and the ear removing means, and to reliably remove the ear. An object of the present invention is to provide a box-making apparatus that can be used.

<Means for Solving the Problems> As a box-making apparatus of the present invention for achieving the above-mentioned object, as a box-like device corresponding to each ear portion of a single plate, a tip end portion of which can contact the above-mentioned ear portion. A moving blade, a driving means for moving the rotating blade from the outside of the tubular shape to a predetermined position of the ear portion, and a returning means for returning from the predetermined position of the ear portion to the outside of the cylindrical shape; Rotation control means for allowing rotation during forward movement and restricting rotation during backward movement is provided, and the rotary blade is moved by the drive means on the single plate when forward. It has a shape that allows it to bite into a veneer when it is transferred and returned.

<Operation> According to the box-making apparatus having the above-described configuration, the rotating blade can be moved from the outside of the tubular shape to the predetermined position of the ear portion by the driving means, and at the same time, from the predetermined position of the ear portion to the tubular shape. Can be moved back to the outside. Then, the rotary blade is configured to be transferred by the drive means on the veneer when it is moved forward and to be bite into the veneer when it is moved backward. As a result, when the rotary blade is moved forward, the rotary blade control means allows the rotary blade to rotate, and the rotary blade is rotated by the contact resistance with the ear portion. It is possible to dispose the rotary blade at a predetermined position of the ear while preventing the tip from being caught by the ear of the single plate.In this state, the rotary blade can clamp the ear. it can. Further, when the rotary blade is returned, the rotation control means restricts the rotation of the rotary blade, the hook is hooked on the ear portion, and the ear portion is removed to the outside of the cylindrical shape. You can

<Examples> Detailed description will be given below with reference to the accompanying drawings showing examples.

FIG. 1 is a schematic plan view showing a box making apparatus of the present invention.
The above box making device has a plurality of tubular shapes (1) along a circumferential orbit.
Are arranged at equal intervals, and a transporting means (2) for intermittently moving each tubular mold (1) along a circumferential orbit is provided. The cylindrical shape (1) is provided at four places in the figure, and the transfer means (2) allows 1 /
Transferred four times at a time. Then, the stop positions of the respective cylinders (1) are sequentially arranged in the moving direction in the loading position (P1), the molding position (P2), and the bending position (P).
3) and the standby position (P4) respectively.

The cylindrical mold (1) is a combination of four-divided mold pieces (11) that can be adjusted with respect to each other through a connecting rod (12). It is configured as a so-called free-size type that can be manufactured (see the drawing). The upper surface of each mold piece (11) is formed flat so that the corners of the rectangular single plate (A), which is the material of the box (B), can be placed, and each mold piece (11) can be placed. A key-shaped notch (14) is formed in the inner part of the box so as to form a rectangular surrounding space (13) that matches the bottom surface of the box (B). And each mold piece (11)
A stopper (15) for positioning the single plate (A) supplied to the upper surface of the cylindrical mold (1) by a loading means (4) described later at a predetermined position is provided between them.
The single plate (A) is made of a thermoplastic resin foamed sheet or non-foamed sheet.

Further, each mold piece (11) of the cylindrical mold (1) is provided with an ear removing means (3) which is a feature of the present invention.
The ears removing means (3) also serves as the ears clamping means, and at the loading position (P1) and the molding position (P2), the ears (m) at the four corners of the veneer (A) (see FIG. 4). It is possible to remove the ears (m) at the bending position (P3) by clamping (see).

More specifically, as shown in FIG. 2, the ear portion removing means (3) has a large number of blade portions (31) capable of contacting the ear portions (m).
a) a rotating blade (31) having an a), and the rotating blade (31) is moved from the outside of the tubular mold (1) to a predetermined position on the ear (m), and on the ear (m). Drive means (32) for returning to the outside of the cylindrical shape (1) and rotation control for allowing rotation of the rotary blade (31) during forward movement and restricting rotation during backward movement. And means (33). The driving means (32)
Is composed of a rotary actuator (32a) and a rotary arm (32b) which is rotated by a predetermined angle by the rotary actuator (32a), and the rotary blade (31) is the rotary arm (32b). Is connected to the tip end of the through a rotation control means (33) composed of a ratchet mechanism or the like. That is, the rotating blade (31) is provided with a rotating arm (32
When b) is rotated inward of the veneer (A), it makes rolling contact with the veneer (A), and when the turning arm (32b) is turned in the opposite direction, the reverse rotation Is configured as regulated. Moreover, the blade portion (31a) of the rotary blade (31) is tilted in a predetermined direction so as to easily bite into the single plate (A) in the state where the reverse rotation is restricted (see FIG. 2C).

The transport means (2), the arm (21) arranged in a cross shape to support each tubular mold (1), and the rotary index (22) for driving the arm (21) by 1/4 rotation The cylinder type (1) is configured to be transferred at a predetermined timing.

The loading position (P1) is provided with loading means (4) for setting the single plate (A) in the tubular shape (1). As shown in FIG. 3, the loading means (4) includes a rack (41) for stacking the single plates (A) immediately above the tubular shape (1) and one stacked single plate (A). Vacuum suction suction cup (42) and suction cup (42) cylindrical (1)
It consists of a cylinder (43) that moves up and down through the internal space of the cylinder, and the suction plate (42) is advanced upwards by the cylinder (43) to stack the lowest single plate on the rack (41). After sucking (A) on the suction cup (42), sucker (4
By lowering 2), the single plate (A) is converted into a tubular shape (1).
You can set one on top. The rack (41) is formed in a frame shape that can surround the periphery of the single plate (A), and has a lower end portion with a claw (41a) for preventing the end plate (A) from dropping naturally. Is provided. The rack (41) has a structure in which the vertical plate (41b) can be moved along the horizontal plate (41c) so that the end plates (A) of various sizes can be stacked.

Next, in the forming position (P2), the veneered groove (S) as shown in FIG. 4 is formed on the single plate (A) transferred together with the tubular mold (1) from the loading position (P1).
And forming means (5) for melting and cutting the ears (m) at the four corners. As the forming means (5), a double-digited forming die (51), a back plate (52) for mounting the forming die (51), and a cylinder (53) for moving the forming die (51) up and down together with the back plate (52). ) Etc., the bending groove (S) is formed in the single plate (A) by pressing the molding die (51) against the single plate (A), and at the same time, unnecessary ears ( m) can be blown out. The above-mentioned forming die (51) is a combination of four heating blades (51a) with a built-in heater, which are conventionally known, in a cross beam shape, and can be adapted to a single plate (A) of various sizes. In addition, the interval between the heating blades (51a) facing each other can be adjusted.

In addition, the bending position (P3), the molding position (P
The single plate (A) transferred from 2) is provided with a pressing means (6) for pressing and bending the single plate (A) into the cylindrical mold (1), and is continuously connected to the lower part of the cylindrical mold (1) to form a cylinder. An auxiliary mold (7) is provided in which the veneer (A) pressed into the mold (1) is introduced as it is. The pressing means (6) is composed of a rectangular pressing die (61) inside the tubular mold (1) and a cylinder (62) for moving the pressing die (61) up and down. . The stroke of the cylinder (62) is set within a range in which the single plate (A) pushed into the tubular die (1) can be pushed into the auxiliary die (7) (see FIG. 5).

With the above structure, the tubular means (1) is formed by the transporting means (2).
While rotating intermittently, set the veneer (A) on the tubular mold (1) at the loading position (P1), and bend it at the set veneer (A) at the molding position (P2). At the same time as forming the groove (S), the ears (m) at the four corners are melted and cut, and at the bending position (P3), the molded single plate (A) is pushed into the cylindrical mold (1) to be bent, and It is possible to weld the fused cross-sections at the four corners and push them into the auxiliary mold (7) as they are. By performing the above series of steps simultaneously and repeatedly, as shown in FIG. 6, side plates are formed around the bottom plate. A rectangular box (B) that is bent and erected can be sequentially manufactured. As described above, according to the box control device, the loading process, the molding process, and the bending process can be simultaneously performed at the stop positions of the tubular mold (1), so that the idle time can be reduced and The box (B) can be manufactured efficiently and at low cost.

When setting the veneer (A) at the loading position (P1), the turning arm (32b) of the ear removing means (3) is turned by a predetermined angle to move the turning blade (31) to the veneer (31). When the veneer (A) is set, the pivot arm (32b) is pivoted inward of the veneer (A) so that the rotary blade ( By pressing the ears (m) of the veneer (A) at 31), the veneer (A) can be clamped. At this time, since the rotary blade (31) rolls on the single plate (A), there is no possibility that the blade portion (31a) of the rotary blade (31) will bite into the set single plate (A). Then, the set single plate (A) is conveyed to the forming position (P2) and the bending position (P3) while being clamped by the ear removing means (3),
In the bending position (P3), the ear arm (m) of the cylindrical shape (1) is moved by rotating the rotating arm (32b) of the ear removing means (3) to the outside of the single plate (A). It can be scattered outward and removed from the top of the cylinder (1). At this time, since the rotation of the rotary blade (31) is regulated and the blade portion (31a) can bite into the ear portion (m), the ear portion (m) is placed on the cylindrical shape (1). Can be reliably excluded from.

Further, at the bending position (P3), since the expansion of the bent veneer (A) is restricted by the auxiliary mold (7), welding is performed at the four corners of the veneer (A). Therefore, it is possible to reliably prevent the adhesion failure from occurring at the four corners. The box (B) pushed into the auxiliary mold (7) is the subsequent bent veneer (A).
By the pressing action of, the auxiliary mold (7) is sequentially dropped below and collected.

The standby position (P4) may be configured as an unloading position for collecting the box (B). In this case, in the bending position (P3), the cylindrical shape (1)
The single plate (A) is pushed into the inside, conveyed to the unloading position as it is, and by the unloading means having the same structure as the pressing means (6), the box (B) inside the tubular mold (1).
Press and drop to collect. In this embodiment, of course, the auxiliary mold (7) is unnecessary. Further, the cylindrical type (1) may be one that is rotated along an elliptical orbit by a conveying means such as a chain conveyor. Further, the ear removing means (3) can be of course mounted on the conventional box-making apparatus described above.

The box making device of the present invention is not limited to the above embodiment, and for example, the rotary blade (31) of the ear part removing means (3).
As shown in FIG. 7, the upper end portion may be rotatably supported and may be constituted by a single blade which is urged to rotate in a predetermined direction by a spring (34). In some cases,
The rotation control means (33) may be composed of a stopper (33a) which is brought into contact with a predetermined portion of the single blade. In addition, various modifications can be made within a range not changing the gist of the present invention, such as configuring the driving means (32) by a reciprocating air cylinder.

<Effects of the Invention> As described above, according to the box-making apparatus of the present invention, the rotary blade is transferred by the drive means on the veneer when it is moved back, and can bite into the veneer when it is moved back. Since the rotation control means allows the rotation at the time of the backward movement and regulates the rotation at the time of the backward movement, the rotary blade is provided with the cylindrical outer side and the predetermined single plate. By simply moving back and forth between the positions, the veneer clamp and the removal of the unnecessary ears can be alternately performed. Therefore, by using the clamping means and the ear portion removing means in common, the structure can be simplified, and at the time of removing the ear portion, the rotary blade is hooked on the ear portion to secure the unnecessary ear portion from the cylindrical shape. It has a unique effect that it can be removed.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the box making apparatus of the present invention, FIG. 2 is a view showing ear removing means, FIG. 1 (a) is a plan view, (b) is a side view, (C) is a front view of the main part, FIG. 3 is a side view of the box making device, FIG. 4 is a plan view of the molded veneer, FIG. 5 is a cross-sectional view of the main part, and FIG. 6 is a perspective view of the box. , FIG. 7 is a front view of a main portion showing another embodiment. (1) …… Cylinder type, (3) …… Ear removing means (31) …… Rotating blade, (32) …… Drive means (33) …… Rotation control means, (51) …… Molding die (A) …… Veneer, (B) …… Box (m) …… Ear, (S) …… Bending groove

Claims (1)

[Claims] 1. A single plate made of a thermoplastic resin sheet set in a tubular shape is formed with bending grooves and the ears of four corners are melted and cut, and then the single plate is pushed into the tubular shape and folded into a box shape. In a box-making apparatus for bending and assembling, a rotary blade whose tip portion can be brought into contact with the ear portion in correspondence with each ear portion of a single plate, and a rotary blade from the outside of the cylindrical shape which is a predetermined portion of the ear portion. The drive means for moving the position forward and the backward direction from the predetermined position of the ear portion, and the rotation blade for allowing the rotation of the rotary blade during the forward movement, and restricting the rotation during the backward movement. A rotation control means is provided, and the rotation blade is configured to be transferred by the drive means on the veneer when it is moved forward and to be bite into the veneer when it is moved back. A box-making device characterized by being present.