JPH05330528A - Automatic uncasing, content taking-out, and folding device for case - Google Patents

Abstract

PURPOSE:To perform automatic uncasing, content taking-out, and folding of a case, such as a currugated board box, at the same station. CONSTITUTION:A case the band of which is cut for removal has front and rear walls sucked and held by means of a front wall suction cup 36 and a side wall suction cup 44 on a swing support table. Simultaneously with opening of an upper flap, the case is released from support by the swing table to open a lower flap under its own weight, and an article is dropped. The front wall suction cup 36 is made to pivot by 90 deg. by means of a swinging device 37 comprising a double parallel link mechanism to fold the case. The folded cases are laminated on a pallet and a belt is run around the laminated cases for binding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention opens a case, such as a normal cardboard box, in which articles such as empty plastic bottles are stored and packed, takes out the stored articles, folds the empty case, and discharges the articles. The present invention relates to an automatic box opening / extracting / folding device for a case that automatically performs a series of steps.

[0002]

2. Description of the Related Art Conventionally, opening a case, taking out an article,
Various devices are known as devices for automatically performing a series of steps of folding and discharging an empty case, such as those described in Japanese Patent Publication No. 57-2578 and Japanese Patent Publication No. 62-9020. In these conventional devices, the removal of articles from the case and the folding of the empty case are performed by different devices at different stations. Therefore, it is not known that the process of taking out the article from the case and the process of folding the empty case are performed in the same station. Therefore, in order to completely automatically perform the process of taking out an article from a corrugated cardboard package and folding the empty case, a device for unpacking the case and taking out the article and a device for folding the case must be provided in a connected manner. However, there are problems that the equipment cost becomes high, the work line becomes long, and a large space is required.

Further, the conventional case folding device generally sucks the side wall or the front wall of the case with a suction cup and rotates one of the suction cups by about 90 ° to form a corrugated cardboard box with upper and lower flaps opened at four corners. Each ridge is used as a hinge to rotate each wall and fold it into a flat shape. However, due to the mechanism, the center of rotation of the suction cup and the center of rotation of the wall of the cardboard box that is held by suction by the cup do not match, so there is a problem that excessive force acts on the cardboard and damages it. , I could not withstand long-term use as a container. Further, in the conventional corrugated cardboard boxes that have been unloaded and folded, only the corrugated cardboard boxes are stacked and bound (for example, Japanese Patent Publication No. Sho 62-9020) and returned separately from the pallet. Therefore, there is a problem that the handling of empty pallets is troublesome.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks of the prior art, and to automatically perform a series of steps of unpacking a case, taking out an article, and folding a case. In the device capable of carrying out, the taking out of articles and the folding of the case can be performed at the same station, and the folding can be performed smoothly without damaging the case, and the empty pallet and the empty case are bound together. It is to provide an automatic box opening / removing / folding device for cases that can be returned.

[0005]

In order to solve the above-mentioned problems, an automatic box opening / extracting / folding device for a case according to the present invention is a depalletizer for supplying cases stacked on a pallet one by one on a case supply conveyor. Apparatus, band cutting / removing device provided in the first station for cutting and removing the band, rocking support for supporting a case arranged in the second station downstream of the band cutting / removing station, on the rocking support A front wall suction cup having a front wall suction cup for sucking and holding the front wall of the case, a side wall suction device having a side wall suction cup, and a flap opening device for opening the case flap. Is a position at which the case folding device sucks the front wall of the case entering the second station, and the suctioned front wall is rotated about 90 ° on the extension of the side wall. So it could be solved by adopting the technical means, characterized in that it is displaceable in a position to hold the folded state the empty case.

By providing a turntable device at the base end of the case feeding conveyor, cases stacked in any form on a pallet can be aligned in one direction and can be handled. Further, the front wall suction holding device is a suction cup that sucks the front wall of the case, and the suction cup is approximately 90 °
The empty case can be folded without difficulty due to the structure including the rocking device including the double parallel link mechanism for rocking and the drive device for rocking the rocking device.

Further, a clip device for gripping an empty case folded at the second station and transporting it to the palletizing station, an empty pallet transport conveyor for transporting empty pallets from the depalletizing station to the depalletizing station, and a palletizing station for palletizing stations. By providing an empty case stack carry-out conveyor for discharging the empty case stacks stacked above and an empty case bundling device for bundling the empty case stacks, a series of stacking and bundling empty cases on an empty pallet The process can be performed automatically.

Further, the depalletizing station is provided with a lifter for raising an empty pallet conveyed to the position and a pallet support piece for locking and holding the pallet raised by the lifter. The empty pallets conveyed from the palletizing station can be sequentially stacked below the pallets in the case stacking, and a plurality of used empty pallets can be bound together with the empty cases.

[0009]

The case packages are transferred one by one onto the case supply conveyor by the depalletizer, and when the cases on the pallets have different directions, they are aligned in one direction by the turntable. Always unpack the case from the case supply conveyor with the pusher device while keeping it aligned in one direction.
It is delivered to the first station of the folding section. When the case package is transferred to the first station, the band is cut by the band cutter device, and at the same time, the outer flap opening device operates to suck and open the upper outer flap. Then, the outer flap holding piece locks the inner surface of the opened outer flap, and in this state, the case is transferred to the second station.

At this time, the rocking support of the second station is in a horizontal state, and when the case arrives, the front wall suction cup of the case folding device and the suction cup of the side wall suction cup device are activated to operate the front wall of the case and the front wall of the case. Hold the side wall by suction. Then, the inner flap opening device is actuated to open the upper inner flap by the inner flap suction cup so that the upper flap is completely opened. At the same time, the swing support is rotated from the horizontal position to the hanging state to release the support of the case, the flap at the bottom of the case is opened, and the article falls into the hopper by its own weight. When the articles have been dropped from the case, the cylinder device of the case folding device
The double parallel link mechanism is activated, and the front wall suction cup rotates outward by about 90 ° while holding the front wall of the case by suction. At this time, the front wall suction cup is rotated about the corner portion of the case by the double parallel link mechanism, so that the rotation center of the suction cup and the rotation center of the front wall of the case coincide with each other. The suction cup rotates while sucking the front wall without applying an excessive force to the case, and the case can be smoothly folded without damaging the case.

When the folding of the case is completed, the clip device grips the upper side of the folded case and transfers it to the palletizing station, and the case is dropped and stacked on an empty pallet waiting below the palletizing station. At this time, the height position of the clip can be adjusted to a height according to the size of the case by elevating the elevating base.

The empty pallets that have been unloaded at the depalletizing station are automatically sent to the palletizing station by the empty pallet transport conveyor, and are sequentially transferred to the pallet under the palletizing operation by the cooperation of the lift and the pallet support pieces. Can be stacked. As a result, the pallets can be used in the same manner as a box, and empty pallets larger than the number of empty case stacks can be returned together with the empty cases instead of being in the empty pallet state. When a predetermined number of empty cases are stacked, the case stack is unloaded from the palletizing station and transferred to a position where the press / bundling device is arranged to be bound, so that the case can be easily transported. Therefore, the apparatus of the present invention is installed in, for example, a maker for filling contents into a container, and a container is loaded from a container maker into a case and carried in in a stacked state on a pallet. By connecting to a container supply device that supplies
Demonstrate exceptional usefulness.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. The case handled by the apparatus of the present embodiment is made of a cardboard box and stores articles such as empty plastic bottles. The flaps are simply closed and banded, and after the articles are taken out, they can be folded and repeatedly used as a box. It is like this. As shown in FIG. 5, the case 5 in the packed state is loaded into the apparatus of this embodiment while being stacked on the pallet 7 in an appropriate pattern. In addition, 6 is a band for bundling in the figure.

FIG. 1 is a plan view showing the overall arrangement of the apparatus of this embodiment. In the figure, reference numeral 1 denotes an actual pallet conveyor that conveys an actual pallet in which cases are stacked, and is constituted by a chain conveyor and extends to a depalletizing station A. Reference numeral 2 denotes a roller conveyor, which is arranged between the chains at the ends of the actual pallet transport conveyor at a right angle thereto and can move up and down. 3 is a depalletizer,
The vacuum type transport head 4 can be driven and rotated in the XYZ axis directions, and the cases on the pallet can be suction-held one by one and transferred onto the case supply conveyor 10. Reference numeral 11 denotes a turntable which is arranged between the rollers on the base end side of the case supply conveyor 10 and which can be moved up and down slightly and rotated. The case 5 transferred onto the case supply conveyor can be moved 90 ° or 180 °. It can be rotated in the angle of and aligned in one direction. Thereby, it is possible to cope with any form of packing the cases on the pallet 7. A pusher device 13 transfers the case 5 on the case supply conveyor 10 to the first station B of the case unpacking / folding unit 20.
4 is reciprocally driven along the drive guide 15.

The specific construction of the case unpacking / folding section 20 is shown in FIGS. The unpacking / folding part of the case is composed of the first station B for cutting and removing the band of the case and opening the outer flap, and the second station C for opening the other flaps, taking out the articles and folding the empty case. ing. A band cutter device 21 is arranged in the first station B to cut the band 6 of the case 5 and drop the cut band into a band collecting box arranged below the first station to collect the band. As the band cutter device 21, for example, a conventional device having a heat cutter and a roller for discharging the band can be adopted. Further, an outer flap opening device 22 is arranged at the first station. The outer flap opening device 22 is rotatably arranged on the upper surface of the case 5 transferred to the station,
A swing arm is provided on a rotary shaft that is rotated by a cylinder (not shown), and a suction cup 23 is provided at the tip of the swing arm.
By rotating the rotary shaft, the upper outer flap is sucked and opened. Further, an outer flap holding piece 25 extending from the first station B to the second station C is arranged in order to keep the opened outer flap open. The outer flap holding piece 25 includes a rotating shaft 26.
It is adapted to be driven by an appropriate drive device 27 such as a cylinder so as to rotate between a position where it is pivotally supported by and is engaged with the opened outer flap and a position where it does not interfere with the opening of the outer flap. There is.

In the second station C, a pair of rocking support bases 30 (FIG. 3) which are composed of free rollers and which can rock in a horizontal state and a hanging state are arranged, and from the first station by an appropriate feeding means. The case sent to the swing support 3
Stop on 0 and hold. The rotation shaft of the swing support base 30 adjusts the deviation between the rotation center of the swing support base 30 and the rotation center of the outer flap under the case, and when the swing support base is opened, the lower flap of the case is opened. The inlet side (first station B side) is supported at an eccentric position of a bearing plate 32 rotatably supported by a guide plate provided on the machine frame so that the hinge part of the machine frame is not crushed, and the other side is supported by the machine frame. It is rotatably supported by a bearing provided on the. As shown in FIG. 3, the bearing plate 32 disposed on the inlet side of the second station has the case 5 that is the second case when the swing support is in the horizontal state (closed state).
A notch having a substantially 1/4 circular shape is formed in the portion located on the transport path so as not to interfere with the movement to the station C. A drive lever 33 for rotating the rotary shaft is fixed to the other end of the rotary shaft of the rocking support base 30, and the rocking support base 30 is illustrated by operating the drive lever 33 by a cylinder device 34. As described above, it is possible to maintain two states, that is, a closed state which is a horizontal state and an open state which is opened slightly outward from the vertical hanging indicated by a virtual line.

The second station C is provided with a case folding device 35 having a front wall suction cup 36 for sucking the front wall of the case transferred to the second station.
As shown in FIG. 2, the case folding device 35 includes a front wall suction cup 36 and a swinging device 37 including a double parallel link mechanism.
And the rocking device is driven by a cylinder device 38. The rocking device 37 uses the machine frame 39 as a fixed link to form an end rocking lever of the double parallel mechanism with a right-angled triangular plate 40, and a suction cup mounting piece 41 on the vertical side of the right-angled triangular plate.
Is fixed, and the extension of the pivot point of the right-angled triangular plate with the parallel link is provided so as to pass through the corner portion p serving as the folding axis of the case held at the second station. Therefore,
By driving the cylinder device 38, the suction cup 36 is rotated about the point p by the double parallel link mechanism and, as shown in the figure, the position on the side wall extension of the case located at the station and the virtual position. As indicated by the line, the front wall of the case is freely displaced between the positions for holding the front wall of the case, and by rotating the front wall of the case held at the position of the second station while adsorbing the front wall, The case can be folded. In FIG. 2, reference numeral 64 denotes a flap pressing lever of the folded case, which is a position (illustrated position) for pressing the flap of the case in a state of being folded by being sucked by the front wall suction cup and a swinging movement of the flap. It is supported by the machine frame so that it can swing between positions that do not interfere with movement.

Further, the second station is provided with a pair of side wall suction devices 42 for suctioning the side walls on both sides of the case. The side wall suction device is configured such that the cylinder device 43 fixed to the machine frame can drive the suction cup 44 to project toward the side wall of the case located at the second station to hold the side wall of the case by suction. ing.

Further, an inner flap opening device 45 for opening the case is arranged above the second station. In the inner flap releasing device 45, the pair of inner flap suction cups 46, 46 is held by the swinging piece 47 in the case 5 in a state where it is held by the outer flap holding piece 25 and the upper outer flap is opened. The swing piece is fixed to a rotary shaft 49 that is rotated by a rotary actuator 48,
The flap is configured to be swingable between two positions, i.e., a closed position and a substantially 90 [deg.] Opened position. The inner flap opening device 45 is suspended and supported by the elevating base 56 similarly to a clip device described later, and is attached so as to be vertically adjustable according to the size of the case. Further, in the present embodiment, the lower outer flap of the case projecting from between the free rollers of the swing support base 30 and located on the swing support base is sucked and rotated together with the swing flap to move the lower flap. A lower outer flap suction cup device 63 is provided to smoothly open the outer flap on the side. However, the lower outer flap suction cup device is not always necessary, and the flap and the container may be naturally opened by their own weight.

From above the end of the second station C to above the palletizing station D, as shown in FIG. 3, the case folded at the second station C is gripped and conveyed to the palletizing station D. Clip device for 5
0 is provided. The clip device 50 has a clip 51 for gripping the upper side of the folded case, and is vertically supported by being screwed and supported by a plurality of screw rods 55 vertically provided on the machine frame. It is guided and supported by a guide / support member 57 supported on the lower surface of 56, and is reciprocally moved between the second station and the palletizing station D by being pulled by a chain 54 which is rotationally driven by a motor 53, and folded. The cases are sequentially transported to the upper part of the palletizing station and dropped. A bevel gear 58 is fixed to the top of the screw rod 55, meshes with a bevel gear 60 provided on a drive shaft 59 extending in the lateral direction, and the drive shaft 59 is rotated by a rotation drive device (not shown) The rod 55 rotates in synchronization with each other, and the elevating base 56 screwed to the rod 55 ascends and descends, so that its height position can be adjusted.

In the palletizing station D for stacking folded cases on an empty pallet, a case temporary receiving piece 65 (FIG. 4) which can be moved to a cardboard box receiving position and a retracted position by being driven by a cylinder device or the like. ) Is provided, and the case transferred by the clip device 50 is temporarily received on the temporary receiving piece 65, aligned in the horizontal direction, and stacked on the pallet 7. Further, in FIG. 4, reference numeral 66 is a lifter capable of lifting the pallet sent from the depalletizing station A by the empty pallet transfer roller conveyor 68 by almost one pallet height, and 67 is the lifter. It is a pallet support piece for temporarily supporting the lifted pallet. Reference numeral 70 (FIG. 1) is a binding device with a pressing device 71 provided in the conveying path of empty cases stacked on the pallet, and after stacking the empty cases on the pallet at this position by pressing the empty case with the pressing device, One band 72 is hung at the center to be bound.

The automatic box opening / extracting / folding apparatus for the case of this embodiment is configured as described above and operates as follows. An actual pallet 75 as shown in FIG. 5 is transferred by a forklift onto the actual pallet transfer conveyor 1 and transferred from the conveyor to the depalletizing station A,
At this position, the boxes are transferred onto the roller conveyor 2 one by one by the depalletizer 3. There is a turntable 11 at the base end of the roller conveyor 2, and when the orientation of the corrugated board is different depending on the loading position on the pallet, it rises to lift the case on the roller conveyor and rotate it to align it in one direction. By descending, the case can be sent to the end of the case supply conveyor 10 with the case always aligned in one direction. The case transported to the end of the roller conveyor is fed by the pusher device 13 to the first station B in the unpacking / folding section of the case.

When the case is transferred to the first station B, the band is cut by the band cutter device 21, and the cut band is fed by the rollers and dropped into the band collecting box provided below and collected. To be done. At the same time, the outer flap opening device 22 is actuated, and the suction cup 23 suctions and opens the upper outer flap. Then, the outer flap holding piece 25 rotates from above to lock the inner surface of the opened outer flap. In this state, the case is transferred to the second station C by an appropriate feeding means such as a reciprocating device.

At this time, the rocking support base 30 of the second station C is in a horizontal state, and the notch of the bearing plate 32 faces the case conveyance path to receive the case. When the case reaches the second station C, the front wall suction cup 36 of the case folding device 35 and the suction cup 44 of the side wall suction device 42.
Operates to hold the front and side walls of the case by suction. Further, the inner flap opening device 45 operates, the inner flap suction cup 46 sucks the upper inner flap, and the swinging piece 4
When 7 rotates, the inner flap is opened and the upper flap of the case is kept in a completely opened state.

At the same time, the drive cylinder device 34 of the rocking support base 30 holding the case is actuated, and the rocking support base 30 is rotated from the horizontal position to the hanging state to release the support of the case. To do. When the bottom surface of the case is no longer supported, the case is sucked and held only by the front wall suction cup and the side wall suction cup, and the outer flap at the bottom of the case is sucked and opened by the suction device 63 that swings in synchronization with the swing support base. At the same time, the inner flap opens due to the weight of the articles in the box, and the articles are placed in the hopper 62.
It falls under its own weight. At this time, since the rotary shaft of the swing support base is eccentrically supported by the bearing plate 32, the swing support base 3
The rotation axis of 0 itself also swings, the deviation between the center of rotation of the flap and the center of rotation of the swing support is adjusted, and the swing support can be opened without crushing the hinge part of the outer flap at the bottom of the case. .

When the fall of the article from the case 5 is completed, the cylinder device 38 of the case folding device 35 is driven and the cylinder rod descends, whereby the double parallel link mechanism provided in the machine casing 39 operates. , Front wall suction cup 36
The right-angled triangular plate 40 which holds is moved from the position shown by the phantom line in FIG. At that time, since the right triangle plate rotates about the corner point of the case, the suction cup also rotates 90 ° about the corner point. That is, the center of rotation of the suction cup 36 and the center of rotation of the front wall of the case 5 coincide with each other, and the suction cup rotates while sucking the front wall without applying an unreasonable force to the case, The case can be folded smoothly.

When the folding of the case is completed, the flap pressing lever 64 swings to prevent the upper flap from engaging laterally to prevent the flap from opening, and the clip 51 of the clip device 50 is folded. The empty case is dropped by gripping the upper side of the case and operating the motor 53 to move the clip device 50 along the guide / support member 57 onto the palletizing station D to release the grip of the clip. Then, the cardboard temporary receiving piece 65 is held. At that time, the height position of the clip 51 and the height position of the inner flap opening device 45 are adjusted to an appropriate height according to the size of the case. The adjustment is performed by rotating and driving the drive shaft 59 to rotate the screw rod 55, so that the elevating base 56 screwed to the screw rod moves up and down.

The case held on the case temporary receiving piece 65 is dropped and stacked on the empty pallet 7 waiting below the stacking station when the temporary receiving piece retracts and releases the support. The empty pallet 7 that has been unloaded at the depalletizing station A is automatically sent to the position by the empty pallet transport roller conveyor 68. At that time, the number of cases that can be loaded on one pallet is by far larger than the case where the contents are stored in the case that is empty, so there are unused empty pallets left and returned as empty pallets. I have to do it. In this embodiment, in order to eliminate this, all the pallets 7 that have become empty are conveyed to the palletizing station and sequentially stacked under the pallet during the palletizing work, so that 2 to 5 pallets are formed. The empty cases that are stacked and folded on top of each other are returned as a single case stack in a stacked state. In order to do that, there is a lower lifter 66 of the palletizing station, and when an empty pallet 7 is conveyed from the depalletizing station during the palletizing work, the lifter 66 operates to raise the pallet 7 on the lifter. The pallet support piece 67 supports it, and the lifter descends again to receive the next empty pallet on the lifter, and the pallet supported by the pallet support piece 67 is lowered and stacked on the empty pallet. By repeating this,
As shown in FIG. 6, a plurality of pallets 7 can be stacked. When a predetermined number of empty cases are stacked, the case stack is unloaded from the palletizing station D and transferred to the position where the pressing and binding device is arranged, and is first pressed by the pressing device 71 and bound in this state. By the device 70, one central band is strapped and bundled, as shown in FIG.
An empty case laminate 76 as shown in FIG.

[0029]

The present invention has the following special effects with the above configuration. Since it is possible to take out the articles and fold the case at the same station, the facility cost is much lower than before, the work line is shortened, space can be saved, and the work efficiency can be shortened. Can be promoted. Further, according to the configuration of claim 2, even if the cases are stacked on the pallet in any pattern, the case can be dealt with.

According to the third aspect of the invention, the front wall suction cup of the folding device further rotates by the double parallel link mechanism so as to coincide with the rotation center of the suction cup and the rotation center of the front wall of the case. It can be folded smoothly without applying excessive force, and the durability of the case can be improved. According to the fourth and fifth aspects, it is possible to automatically stack a plurality of empty pallets that have been unloaded at the depalletizing station and stack a folded empty case on the empty pallets. It can be used in the same way as a box, and can be bound together with an empty case and returned, making it easy to handle empty pallets and improving work efficiency.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an automatic box opening / stock removal / folding device for a case according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of an opening / folding portion of the case.

FIG. 3 is a main part of a view taken along the arrow I-I of FIG.

FIG. 4 is a main part of a view taken along the line II-II in FIG.

FIG. 5 is a perspective view of an actual pallet.

FIG. 6 is a perspective view of an empty case stack.

[Explanation of symbols]

1 Actual Pallet Conveyor 3 Depalletizer 5 Case Packing 6 Band 7 Pallet 10 Case Supply Conveyor 20 Case Unpacking / Folding Part 21 Band Cutter Device 22 Outer Flap Opening Device 25 Outer Flap Holding Piece 30 Swing Support 32 Bearing Plate 35 Case folding device 36 Front wall suction cup 37 Swing device 38 Cylinder device 42 Side wall suction device 45 Inner flap opening device 46 Inner flap suction cup 50 Clip device 51 Clip 55 Screw rod 56 Lifting base 62 Hopper 66 Lifter 68 Empty pallet transport roller Conveyor 70 Bundling device 71 Press device 75 Real pallet 76 Empty case stack

Claims (5)

[Claims] 1. A depalletizer device for feeding cases stacked on a pallet one by one onto a case feed conveyor, a band cutting and removing device provided in a first station for cutting and removing bands, and the band cutting and removing station. A case folding device having a swing support base for supporting a case arranged at the second station on the further downstream side, a front wall suction cup for sucking and holding a front wall of the case located on the swing support base, and a side wall suction The front wall suction cup comprises a side wall suction device having a cup and a flap opening device for opening the case flap, and the front wall suction cup has a position for sucking the front wall of the case when the case folding device enters the second station, It is characterized in that the sucked front wall can be rotated by about 90 ° on the extension of the side wall to be displaced to a position for holding the empty case in a folded state. Auto Open box, goods taken out-folding device of the case. 2. The automatic box opening / extracting / folding device for a case according to claim 1, wherein a turntable device is provided at a base end portion of the case supply conveyor. 3. A case folding device comprises a suction cup for sucking a front wall of the case, and a swing cup for swinging the suction cup by substantially 90 °.
3. An automatic box opening / extracting / folding device for a case according to claim 1 or 2, further comprising a swinging device including a heavy parallel link mechanism and a drive device for swinging the swinging device. .. 4. A clip device for gripping an empty case folded at the second station and transporting it to a palletizing station, an empty pallet transport conveyor for transporting empty pallets from the depalletizing station, and a palletizing station. 4. The case according to claim 1, further comprising: an empty case stack carry-out conveyor for carrying out empty case stacks stacked on a pallet, and an empty case binding device for binding the empty case stacks. Automatic opening of boxes
Folding device. 5. The depalletizing station is provided with a lifter for raising an empty pallet conveyed to the position, and a pallet support piece for locking and holding the pallet raised by the lifter. The empty pallets conveyed from the container can be sequentially stacked below the pallets that are being loaded into the case, and the case is automatically opened, the articles are taken out, and the articles are folded. apparatus.