JP6937641B2 - Cardboard caser and control method of cardboard caser - Google Patents

Description

The present invention relates to a corrugated cardboard caser and a method for controlling a corrugated cardboard caser.

Conventionally, there is known a wraparound type corrugated cardboard caser in which a box is molded from a corrugated cardboard sheet and the filled product is wrapped and wrapped. A corrugated cardboard case is usually used to mold a corrugated cardboard case based on the outer shape of the product to be packaged, and since a certain amount of force is applied to the product, it is suitable for packaging a product that is not easily deformed. In addition, tight packaging is possible, the cost of the corrugated cardboard case can be reduced, and the supply direction of the product can be freely set, and the device layout can be rationalized (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-9931

By the way, when the guide of the wraparound type corrugated cardboard case folds the inner flap of the corrugated cardboard sheet, the edge portion of one flap and the surface of the other flap come into contact with each other at the inner flap and the outer flap, and the wrap-around type corrugated cardboard caser guide does not fold well. Sometimes. As described above, when the inner flap and the outer flap interfere with each other, there is a problem that the corrugated cardboard sheet is scratched.
Further, if the inner flap is not folded in a regular manner and is folded on the outside of the outer flap, there is a problem that a regular crimping / box forming state cannot be ensured in a downstream process such as a glue application / crimping step.

According to the present invention, when the inner flap folding device of the wraparound type corrugated cardboard case folds the inner flap of the corrugated cardboard sheet, the inner flap and the outer flap can be prevented from interfering with each other. The purpose is to provide a control method.

According to the first aspect of the present invention, the corrugated cardboard caser is attached to the upper panel, the first side panel connected to the upper panel, the bottom panel connected to the first side panel, and the bottom panel. A wraparound corrugated cardboard comprising a connected second side panel, a first inner flap connected to one end edge of the first side panel, and a first outer flap connected to one end edge of the upper panel. In a corrugated cardboard caser using a sheet, the corrugated cardboard sheet is arranged on the downstream side of the upper panel and the first side panel in the transport direction, and the main surface of the upper panel and the main surface of the first side panel. Is arranged on the downstream side in the transport direction of the transport device for transporting the corrugated cardboard sheet, the upper panel folding guide for folding the upper panel of the corrugated cardboard sheet, and the upper panel folding guide for folding the first inner flap. The inner flap folding device and the first inner flap are arranged on the upstream side in the transport direction of the inner flap folding device, and the first inner flap is moved by the inner flap folding device at a timing before the upper panel is glued to the second side panel. The outer flap lifting device includes an outer flap lifting device that lifts the first outer flap upward when folded, and the outer flap lifting device is not folded when viewed from a position for lifting the first outer flap and the transport direction. It has an outer flap holding plate that does not overlap with the first inner flap and is swingably provided between a retracted position whose tip is located below the upper panel, and is said by the inner flap folding device. until folding of the first inner flap is completed, so that the outer flap retaining plate is positioned at the retracted position, Ru a control device having a saving unit for controlling the outer flap lifting device.
Further, according to such a configuration, it is possible to prevent the inner flap before being folded and the outer flap holding plate of the outer flap lifting device from interfering with each other.

According to such a configuration, when the inner flap folding device of the wraparound type corrugated cardboard caser folds the inner flap of the corrugated cardboard sheet, it is possible to prevent the inner flap and the outer flap from interfering with each other.

In the corrugated cardboard case, the corrugated cardboard sheet has a joint margin connected to the side opposite to the bottom panel of the second side panel, and the joint margin folding device for folding the joint margin and the upper panel are combined. An upper panel lifting device that lifts upwards may be provided.

According to such a configuration, by folding the joint margin while lifting the upper panel upward, it is possible to prevent the joint margin from being folded above the upper panel.

According to the second aspect of the present invention, the method for controlling the corrugated cardboard case is any of the above methods for controlling the corrugated cardboard case, and the corrugated cardboard sheet is attached to the upper panel and the first item by using the transport device. Using a transport process in which one side panel is arranged on the downstream side in the transport direction and the main surface of the upper panel and the main surface of the first side panel face the transport direction, and an upper panel folding guide is used. Then, at the upper panel folding step of folding the upper panel of the corrugated cardboard sheet and at the timing before the upper panel is glued to the second side panel, the outer flap lifting device is used, and the inner flap folding device is used. An outer flap lifting step of lifting the first outer flap upward when the first inner flap is folded, and an inner flap folding step of folding the first inner flap using the inner flap folding device are sequentially provided.

According to the present invention, when the inner flap folding device of the wraparound type corrugated cardboard caser folds the inner flap of the corrugated cardboard sheet, it is possible to prevent the inner flap and the outer flap from interfering with each other.

It is a schematic perspective view of the corrugated cardboard caser of the embodiment of this invention. It is the schematic of the corrugated cardboard sheet of embodiment of this invention. It is a perspective view explaining the state of the corrugated cardboard sheet and the product of the pre-stage introduced into a sheet folding apparatus. It is a schematic side view of the sheet folding apparatus of embodiment of this invention. It is a front view seen from the transport direction of the outer flap lifting device of embodiment of this invention. It is the schematic explaining the operation of the corrugated cardboard caser of embodiment of this invention.

Hereinafter, the corrugated cardboard caser according to the embodiment of the present invention will be described in detail with reference to the drawings. The corrugated cardboard caser of the present embodiment is a device for packing (packing) products in corrugated cardboard, and is a so-called wraparound type device suitable for packing products such as beverages in PET bottles, for example.

As shown in FIG. 1, the corrugated cardboard case 1 includes a conveyor 2 (conveyor device) for transporting the product P and the corrugated cardboard sheet 100, a sheet supply device 3 for supplying the corrugated cardboard sheet 100 from the magazine M to the conveyor 2, and a corrugated cardboard sheet. A sheet folding device 4 (see FIG. 4) for folding 100 and a control device 5 are provided.

As shown in FIG. 2, the corrugated cardboard sheet 100 is connected to the upper panel 101, the first side panel 102 connected to the upper panel 101, the bottom panel 103 connected to the first side panel 102, and the bottom panel 103. The second side panel 104, the inner flap 105 continuous with both end edges of the first side panel 102, and both end edges of the second side panel 104, and continuous with both end edges of the upper panel 101 and the bottom panel 103. It has an outer flap 106 and. A joint margin 107 is provided on the side of the second side panel 104 opposite to the bottom panel 103.

Further, the outer flap 106 connected to the upper panel 101 is referred to as a first outer flap 106a. The outer flap 106 connected to the bottom panel 103 is referred to as a second outer flap 106b. The inner flap 105 connected to the first side panel 102 is called the first inner flap 105a. The inner flap 105 connected to the second side panel 104 is referred to as a second inner flap 105b.

Further, in the unfolded state of the corrugated cardboard sheet 100 (the state shown in FIG. 2), a gap G is provided between the outer flap 106 and the inner flap 105. As for the gap G, the smaller the size of the gap G, the higher the strength of the assembled corrugated cardboard.

The magazine M is formed by laminating a plurality of corrugated cardboard sheets 100.
The sheet supply device 3 has a sheet taking-out unit (not shown) for peeling the corrugated cardboard sheet 100 from the magazine M one by one, and a sheet conveying unit 7 for transporting the corrugated cardboard sheet 100 to the conveyor 2.
In the sheet supply device 3, the upper panel 101 and the first side panel 102 are arranged on the downstream side in the transport direction T, and the main surface of the upper panel 101 and the main surface of the first side panel 102 face the transport direction T. In this state, the corrugated cardboard sheet 100 is placed on the conveyor 2. In the corrugated cardboard sheet 100, the sheet supply device 3 has the bottom panel 103 and the second side panel 104 in surface contact with the conveyor 2 in a state where only the ridge line between the bottom panel 103 and the first side panel 102 is folded. Placed in the state.

By the sheet supply device 3, the corrugated cardboard sheet 100 is arranged on the conveyor 2 in the form shown in FIG. As shown in FIG. 3, in the corrugated cardboard sheet 100 supplied on the conveyor 2 by the sheet supply device 3, the bottom panel 103 and the second side panel 104 are arranged so as to be in surface contact with the main surface of the conveyor 2, and the bottom panel The ridgeline between the 103 and the first side panel 102 is bent at about 90 °, and the outer surface of the first side panel 102 and the outer surface of the upper panel 101 are placed on the conveyor 2 in a state of facing the downstream side.

The sheet folding device 4 is a device that folds each part of the corrugated cardboard sheet 100 in a state as shown in FIG. 3 to make a boxed product 109 (see FIG. 1).
As shown in FIG. 4, the sheet folding device 4 includes a case pusher 8 for folding the second side panel 104, an upper panel folding guide 9 for folding the upper panel 101, and an outer flap lifting device 10 for lifting the first outer flap 106a. It is arranged on the downstream side of the upper panel folding guide 9 in the transport direction T, and has an inner flap folding device 11 for folding the first inner flap 105a and a side tacker 12 for folding the second inner flap 105b.

Further, the sheet folding device 4 includes an adhesive coating device (not shown) for applying an adhesive to the joint margin 107, a seam hook 14 (joint margin folding device) for folding the joint margin 107 coated with the adhesive, and a seam hook 14 (joint margin folding device). It has an upper panel lifting device 15 that lifts the upper panel 101 when the joint margin 107 is folded by the seam hook 14.
Further, the sheet folding device 4 has an outer flap folding guide 13 for folding the outer flap, and a crimping device (not shown) for crimping the joint margin 107 and the upper panel 101.

The case pusher 8 is a device for folding the second side panel 104 upward. The case pusher 8 moves downstream in synchronization with the conveyor 2. The case pusher 8 folds the second side panel 104 and conveys the product P and the corrugated cardboard sheet 100 to the downstream side.

The upper panel folding guide 9 is a guide member formed so as to approach the conveyor 2 toward the downstream side. When the upper panel folding guide 9 comes into contact with the upper panel 101 of the corrugated cardboard sheet 100 conveyed from the upstream side, the upper panel 101 is folded toward the upstream side.

When the first inner flap 105a is folded by the inner flap folding device 11, the outer flap lifting device 10 lifts the first outer flap 106a connected to the upper panel 101 folded by the upper panel folding guide 9 upward. It is a device.
As shown in FIG. 5, the outer flap lifting device 10 is interlocked with the movements of the bracket 16 fixed to the frame of the corrugated cardboard caser 1, the pneumatic cylinder 17 fixed to the bracket 16, and the rod 18 of the pneumatic cylinder 17. It has a lever 19 that rotates and an outer flap holding plate 20 that is fixed to the lever 19.

The pneumatic cylinder 17 is arranged so that the axis of the rod 18 is orthogonal to the transport direction and the portion farther from the conveyor 2 in the width direction of the conveyor 2 is lower. The lever 19 is rotatably attached around a rotating shaft 21 in which the axis A is arranged along the transport direction. The tip of the rod 18 is connected to one end of the lever 19. As the rod 18 expands and contracts, the lever 19 rotates about the axis A of the rotating shaft 21.

The lever 19 rotates as the rod 18 extends, and the outer flap holding plate 20 is in a position to lift the first outer flap 106a as shown by the solid line in FIG. On the other hand, the lever 19 rotates as the rod 18 contracts, and the outer flap holding plate 20 overlaps with the first inner flap 105a which is not folded when viewed from the transport direction, as shown by the alternate long and short dash line in FIG. It is a retracted position where the tip is located below the upper panel 101. The outer flap holding plate 20 is swingable between a position where the first outer flap 106a is lifted and a position where the first outer flap 106a is retracted.

The inner flap folding device 11 has an introduction portion 11a formed so as to gradually approach the conveyor 2 toward the downstream side, and a main body connected to the downstream side of the introduction portion 11a and formed along the transport direction T. It has a part 11b and.
When the inner flap folding device 11 interferes (contacts) with the first inner flap 105a of the corrugated cardboard sheet 100 conveyed from the upstream side, the unconnected end of the first inner flap 105a is folded toward the upstream side. ..

The side tacker 12 has a rotating shaft 23 extending in the vertical direction, a driving device (not shown) for rotationally driving the rotating shaft 23, and a side tacker main body 24 attached to the rotating shaft 23. .. The rotating shaft 23 is arranged near the conveyor 2, and the side tacker main body 24 rotates so as to fold the second inner flap 105b downstream.

The seam hook 14 has a rotating shaft 25 that is rotated by a motor, and a hook body 26 that rotates with the rotation of the rotating shaft 25. The rotation shaft 25 extends in the horizontal direction orthogonal to the transport direction T. The hook main body 26 is formed so as to fold the joint margin 107 provided on the second side panel 104 in which the tip of the hook main body 26 is folded upward with the rotation of the rotating shaft 25 to the downstream side.

The upper panel lifting device 15 is a device that lifts the upper panel 101 so that when the seam hook 14 folds the joint margin 107, the joint margin 107 is not folded above the upper panel 101. The upper panel lifting device 15 has a rotating shaft 27 extending in the transport direction T and an arm 28 fixed to the rotating shaft 27. The arm 28 lifts the upper panel 101 as the rotation shaft 27 rotates.

The control device 5 controls each component of the sheet folding device 4 according to the position of the corrugated cardboard sheet 100 in the transport direction T.
The control device 5 is an outer flap lifting device 10 so that the outer flap holding plate 20 is located at the retracted position when the corrugated cardboard sheet 100 is conveyed to the position where the first inner flap 105a is folded by the inner flap folding device 11. It has a retracting unit 5a for controlling the above. That is, the retracting unit 5a controls the outer flap lifting device 10 so that the outer flap holding plate 20 is located at the retracted position until the folding of the first inner flap 105a is completed by the inner flap folding device 11.

Next, the positional relationship of each component of the corrugated cardboard caser 1 will be described.
The outer flap lifting device 10 is arranged slightly upstream from the upstream end of the inner flap folding device 11. This is because the inner flap folding device 11 lifts the outer flap 106 upward at a timing before folding the first inner flap 105a.
The upper panel lifting device 15 is arranged slightly downstream of the upstream end of the inner flap folding device 11. That is, the upper panel lifting device 15 is arranged at a position where the inner flap folding device 11 is arranged in the transport direction T.

Next, the control method of the corrugated cardboard caser 1 of the present embodiment will be described.
The control method of the corrugated cardboard caser 1 includes a transfer step, an upper panel folding step, an outer flap lifting step, and an inner flap folding step in order.
In the transfer process, the corrugated cardboard sheet 100 is taken out from the magazine M by the sheet take-out portion of the sheet supply device 3. As shown in FIG. 1, the corrugated cardboard sheet 100 taken out is arranged on the conveyor 2 so that the inner surfaces of the bottom panel 103 and the second side panel 104 face upward.

Next, the product P is filled on the bottom panel 103. As a result, the corrugated cardboard sheet 100 in which the product P is placed on the bottom panel 103 is transported with the upper panel 101 and the first side panel 102 arranged on the downstream side and facing the transport direction T. NS.
After the product P is filled on the bottom panel 103, the second side panel 104 is folded by the case pusher 8. Further, the second outer flap 106b connected to the bottom panel 103 is folded downward by a predetermined guide. Further, in the upper panel folding step, the upper panel 101 is folded by the upper panel folding guide 9.

As shown in FIG. 6A, in the outer flap lifting step, in the control device 5, the first side panel 102 of the corrugated cardboard sheet 100 (downstream end portion of the corrugated cardboard sheet 100) is the tip end (upstream) of the inner flap folding device 11. The outer flap lifting device 10 is controlled to lift the first outer flap 106a upward at a timing before reaching the side end portion).

As shown in FIG. 6B, in the inner flap folding step, the corrugated cardboard sheet 100 moves to the downstream side, so that the first inner flap 105a is folded to the upstream side by the inner flap folding device 11. At this time, since the first outer flap 106a is lifted upward by the outer flap lifting device 10, the interference between the first outer flap 106a and the first inner flap 105a is prevented.
That is, if the first outer flap 106a cannot be lifted by the outer flap lifting device 10, the downstream end of the first outer flap 106a and the first inner flap 105a may interfere with each other. In the corrugated cardboard caser 1, this interference is prevented.

As shown in FIG. 6C, the retracting portion 5a of the control device 5 controls the outer flap lifting device 10 at the timing when the first inner flap 105a is folded by the inner flap folding device 11 to hold the outer flap. The plate 20 is retracted. Further, the second inner flap 105b is folded downstream by the side tacker 12. Further, the adhesive is applied to the joint margin 107 by the adhesive application device.

Next, as shown in FIG. 6D, the control device 5 controls the upper panel lifting device 15 to lift the upper panel 101. The control device 5 controls the seam hook 14 in a state where the upper panel 101 is lifted, and folds the joint margin 107 to the downstream side. At this time, since the upper panel 101 is lifted by the upper panel lifting device 15, the joint margin 107 is prevented from being folded above the upper panel 101.
When the corrugated cardboard sheet 100 is further transported to the downstream side, the joint margin 107 is crimped to the upper panel 101 by the crimping device. Further, the outer flap 106 is folded by the outer flap folding guide 13.

According to the above embodiment, the corrugated cardboard caser 1 has the outer flap lifting device 10 for lifting the first outer flap 106a, so that when the inner flap folding device 11 folds the inner flap 105 of the corrugated cardboard sheet 100, the inner flap 105 and the inner flap 105 It is possible to prevent the outer flap 106 from interfering with the outer flap 106.
In particular, in order to improve the strength of the assembled corrugated cardboard, it is preferable that the gap G shown in FIG. 2 is small, but according to the above embodiment, even when the gap G is small, interference at the time of folding the outer flap 106 Can be avoided.

Further, since the corrugated cardboard case 1 has the upper panel lifting device 15, the upper panel 101 can be lifted while the inner flap 105 is folded by the inner flap folding device 11, and the joint margin 107 can be folded.

Further, the control device 5 has a retracting portion 5a for controlling the outer flap lifting device 10 so that the outer flap holding plate 20 is located at the retracted position, so that the inner flap 105 before being folded and the outer flap lifting device 10 are provided. It is possible to prevent the outer flap holding plate 20 of 10 from interfering with the outer flap holding plate 20.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the embodiments, and includes design changes and the like within a range that does not deviate from the gist of the present invention. ..
In the above embodiment, the outer flap lifting device 10 uses a pneumatic cylinder 17 to swing the outer flap holding plate 20, but the present invention is not limited to this. For example, the outer flap 106 may be lifted by sucking the outer flap 106 using a predetermined suction device.
Further, in the above embodiment, the first inner flap 105a is folded by physically contacting the inner flap folding device 11 with the first inner flap 105a, but the present invention is not limited to this. For example, it may be configured to be folded by using wind pressure from a fan or the like.
Further, in the above embodiment, the corrugated cardboard sheet 100 in which the inner flap 105 is connected to both end edges of the side panels 102 and 104 is used, but the present invention is not limited to this, and the inner flap 105 is attached to the side panels 102 and 104. A corrugated cardboard sheet 100 connected to one end edge may be used. Similarly, a corrugated cardboard sheet 100 in which the outer flap 106 is connected to one end edge of the upper panel 101 and the bottom panel 103 may be used.

1 Corrugated cardboard case 2 Conveyor (conveyor)
3 Seat supply device 4 Seat folding device 5 Control device 5a Evacuation unit 7 Seat transport unit 8 Case pusher 9 Upper panel folding guide 10 Outer flap lifting device 11 Inner flap folding guide (inner flap folding device)
12 Side tacker 13 Outer flap folding guide 14 Seam hook (joint margin folding device)
15 Top panel lift device 17 Pneumatic cylinder 18 Rod 19 Lever 20 Outer flap holding plate 21 Rotating shaft 24 Side tacker body 26 Hook body 28 Arm 100 Corrugated cardboard sheet 101 Top panel 102 First side panel 103 Bottom panel 104 Second side panel 105 Flap 105a First inner flap 105b Second inner flap 106 Outer flap 106a First outer flap 106b Second outer flap 107 Joint margin 109 Boxed product G Gap M Magazine P Product T Transport direction

Claims (3)

An upper panel, a first side panel connected to the upper panel, a bottom panel connected to the first side panel, a second side panel connected to the bottom panel, and one end of the first side panel. A corrugated board caser using a wraparound type corrugated cardboard sheet including a first inner flap connected to an edge and a first outer flap connected to one end edge of the upper panel.
The corrugated cardboard sheet is transported in a state where the upper panel and the first side panel are arranged on the downstream side in the transport direction, and the main surface of the upper panel and the main surface of the first side panel face the transport direction. Conveyor and
An upper panel folding guide for folding the upper panel of the corrugated cardboard sheet and
An inner flap folding device, which is arranged on the downstream side in the transport direction of the upper panel folding guide and folds the first inner flap,
When the first inner flap is folded by the inner flap folding device at a timing before the upper panel is glued to the second panel, the first inner flap is arranged on the upstream side in the transport direction of the inner flap folding device. Equipped with an outer flap lifting device that lifts the outer flap upward,
The outer flap lifting device does not overlap the position where the first outer flap is lifted and the first inner flap which is not folded when viewed from the transport direction, and the tip is located below the upper panel. It has an outer flap holding plate that is swingably provided between it and the retracted position.
A corrugated cardboard provided with a control device having a retracting portion for controlling the outer flap lifting device so that the outer flap holding plate is located at the retracted position until the folding of the first inner flap is completed by the inner flap folding device. Keisa. The corrugated cardboard sheet has a seam connected to the side of the second side panel opposite to the bottom panel.
A seam folding device for folding the seam and a seam folding device,
The corrugated cardboard caseer according to claim 1, further comprising an upper panel lifting device for lifting the upper panel upward. The method for controlling a corrugated cardboard case according to claim 1 or 2.
Using the transport device, the corrugated cardboard sheet is arranged on the downstream side of the upper panel and the first side panel in the transport direction, and the main surface of the upper panel and the main surface of the first side panel are in the transport direction. The transport process and the transport process in which the cardboard is facing
The upper panel folding step of folding the upper panel of the corrugated cardboard sheet using the upper panel folding guide, and
Before the upper panel is glued to the second side panel, the outer flap lifting device is used to move the first outer flap upward when the first inner flap is folded by the inner flap folding device. The outer flap lifting process to lift and
A method for controlling a corrugated cardboard case, comprising, in order, an inner flap folding step of folding the first inner flap using the inner flap folding device.

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