Supporting plate folding and unfolding device

Abstract

The utility model discloses a supporting plate folding and unfolding device which comprises a conveying device. The carrying device comprises a rack, a plate stacking space is arranged on the rack, the plate stacking space and the conveying device are arranged in the left-right direction, a left-right moving mechanism, a lifting moving mechanism and a taking and placing mechanism are arranged on the rack, and the taking and placing mechanism is arranged on the upper side of the conveying device and the plate stacking space. The left-right moving mechanism can drive the taking and placing mechanism to move in the left-right direction so as to move between the conveying device and the plate stacking space. When the front side of the conveying device does not need to transfer the supporting plates, the carrying device can take the supporting plates from the conveying device and stack and store the supporting plates, so that the supporting plates located on the rear side of the conveying device can be normally conveyed without stacking the supporting plates; when the supporting plates need to be transferred on the front side of the conveying device, the carrying device can take the supporting plates from the plate stacking space and place the supporting plates on the conveying device, the supporting plates can be conveyed and transferred forwards to guarantee production, and therefore transferring of the supporting plates is smoother, and the production requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of conveying, in particular to a pallet folding and unfolding device. Background Art

[0002] When some materials need to be transported through multiple production process locations, the materials will be placed on pallets to ensure stable transportation or to avoid damaging the material surface. After the materials are transported, they will be removed from the pallets, and the pallets will remain on the conveyor line for circulation.

[0003] However, during the production and transportation process, some process locations may malfunction, resulting in the accumulation of multiple pallets, or there may be functional requirements for the pallets to be recirculated according to production needs. Technical personnel in this field hope to have a pallet retracting and releasing device that can make the pallet circulation smoother and the production more stable. Utility Model Content

[0004] The main purpose of the utility model is to provide a pallet folding and unfolding device, aiming to make the pallet flow more smoothly.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a pallet retracting and releasing device, comprising:

[0006] A conveying device, wherein the conveying direction is from rear to front;

[0007] The handling device includes a fixed frame, the frame is provided with a stacking space for stacking pallets, the stacking space and the conveying device are arranged in the left-right direction, the frame is provided with a left-right moving mechanism, the moving end of the left-right moving mechanism is provided with a lifting and moving mechanism, the moving end of the lifting and moving mechanism is provided with a pick-up and place mechanism for picking up or putting down the pallet, the pick-up and place mechanism is arranged on the upper side of the conveying device and the stacking space, the left-right moving mechanism can drive the pick-up and place mechanism to move in the left-right direction to move between the conveying device and the stacking space, and the lifting and moving mechanism can drive the pick-up and place mechanism to move in the up-down direction.

[0008] The pallet is transported forward on the conveying device. When the pallet is transported to the side of the stacking space of the handling device, the left and right moving mechanism drives the lifting and moving mechanism and the pick-and-place mechanism to move to the upper side of the pallet on the conveying device. The lifting and moving mechanism drives the pick-and-place mechanism to move downward, and the pick-and-place mechanism sucks or clamps the pallet. The lifting and moving mechanism drives the pick-and-place mechanism upward to pick up the pallet from the conveying device, and then the left and right moving mechanism drives the pallet to move to the stacking space. The pick-and-place mechanism puts down the pallet after it is lifted to a suitable height. Multiple pallets can be stacked in the stacking space; when the front side of the conveying device needs to circulate pallets, the pick-and-place mechanism moves to the stacking space to pick up the pallet, and then moves to the conveying device to put down the pallet. The pallet can be transported forward on the conveying device.

[0009] In this solution, when the front side of the conveying device does not need pallets to circulate, the handling device can take the pallets from the conveying device and stack them for storage, so that the pallets located on the rear side of the conveying device can be transported normally without stacking pallets; when the front side of the conveying device needs pallets to circulate, the handling device can take the pallets from the stacking space and place them on the conveying device, and the pallets can be transported forward to ensure production, thereby making the circulation of pallets smoother and meeting production needs.

[0010] Preferably, the pick-and-place mechanism includes a first pick-and-place seat, which is connected to the moving end of the lifting and moving mechanism. A plurality of suction cups capable of generating negative pressure are provided on the lower side of the first pick-and-place seat, and the plurality of suction cups can suck up the support plate under negative pressure.

[0011] When the suction cup is attached to the upper side of the pallet and generates negative pressure, the suction cup can suck the pallet. When the suction cup returns to normal pressure, the pallet can be put down. It is convenient to pick up or put down the pallet. The suction position on the upper side of the pallet is also convenient for taking and placing multiple pallets when they are stacked.

[0012] Preferably, a first sliding column is fixedly connected to the upper side of the suction cup, the first sliding column extends in the up-down direction, the first sliding column is slidably connected to the first pick-and-place seat in the up-down direction, a first limit block is provided on the upper side of the first sliding column, the first limit block is provided on the upper side of the first pick-and-place seat, a first spring is sleeved on the first sliding column, and the first spring is provided between the first pick-and-place seat and the suction cup.

[0013] When the suction cup moves downward and sticks to the pallet, the first pick-and-place seat will continue to move downward for a distance, and the suction cup and the first slide column will slide upward relative to the first pick-and-place seat to ensure that multiple suction cups can stick to and suck the pallet, so as to avoid that some suction cups cannot suck the pallet due to different suction cup heights, thereby reducing the overall suction force. After the pallet is put down, the first slide column and the suction cup slide downward relative to the first pick-and-place seat under the rebound action of the first spring, and the first limit block can limit the first slide column from falling out of the first pick-and-place seat.

[0014] Preferably, the pick-and-place mechanism also includes a second pick-and-place seat, which is fixedly connected to the moving end of the lifting and moving mechanism, a second slide column is fixedly connected to the upper side of the second pick-and-place seat, the second slide column extends in the up-down direction, the second slide column and the second pick-and-place seat are slidably connected in the up-down direction, a second limit block is provided on the upper side of the second slide column, the second limit block is provided on the upper side of the second pick-and-place seat, a second spring is sleeved on the second slide column, and the second spring is provided between the first pick-and-place seat and the second pick-and-place seat.

[0015] The first pick-and-place seat and the second pick-and-place seat can slide relative to each other through the second sliding column, thereby increasing the cushioning performance of the suction cup after it is attached to the supporting plate and further protecting the suction cup.

[0016] Preferably, the left-right moving mechanism includes a left-right slide and a left-right driving unit, the left-right slide is slidably connected to the frame along the left-right direction, the left-right driving unit is transmission connected to the left-right slide, the left-right slide is the moving end of the left-right moving mechanism, the lifting and moving mechanism includes a lifting slide bar and a lifting driving unit, the lifting slide bar is slidably connected to the left-right slide along the up-down direction, the lifting driving unit is transmission connected to the lifting slide bar, the lifting slide bar is the moving end of the lifting and moving mechanism, and the picking and placing mechanism is arranged on the lower side of the lifting slide bar.

[0017] Preferably, the left and right driving unit includes left and right driving motors, left and right driving gears and left and right driving racks, the left and right driving motors are fixedly connected to the left and right slides, the left and right driving gears are fixedly connected to the rotating shafts of the left and right driving motors, the left and right driving racks extend in the left and right directions, the left and right driving racks are fixedly connected to the frame, and the left and right driving gears are meshingly connected to the left and right driving racks; the lifting driving unit includes a lifting driving motor, a lifting driving gear and a lifting driving rack, the lifting driving motor is fixedly connected to the left and right slides, the lifting driving gear is fixedly connected to the rotating shaft of the lifting driving motor, the lifting driving rack extends in the up and down directions, the lifting driving rack is fixedly connected to the lifting slide rod, and the lifting driving gear is meshingly connected to the lifting driving rack.

[0018] Preferably, the frame is provided with two stacking spaces, which are respectively arranged on the left and right sides of the conveying device. The two stacking spaces can increase the number of stacked pallets and increase the flexibility of pallet circulation.

[0019] Preferably, the pallet storage and release device further includes a pallet release trigger unit, and the left-right moving mechanism, the lifting and moving mechanism and the pick-up and release mechanism are all connected to the pallet release trigger unit signal. When the pallet needs to be circulated, the pallet release trigger unit can send a pallet release signal to the handling device, and the handling device puts the pallet on the conveying device for circulation.

[0020] Preferably, the number of the transport devices is two or more, and all the transport devices are arranged in the front-to-back direction. The two transport devices can increase the number of stacked pallets, increase the operability of stacking and placing pallets, and increase the flexibility of pallet circulation.

[0021] Preferably, the conveying device includes a fixed conveying frame, a conveying motor is fixedly connected to the conveying frame, a driving sprocket and a driven sprocket are rotatably connected to the conveying frame, the driving sprocket and the driven sprocket are arranged front to back, the driving sprocket is transmission-connected to the conveying motor, and a conveying chain is wound around the driving sprocket and the driven sprocket; a blocking cylinder and a positioning cylinder are provided on the conveying frame, a blocking member is connected to the piston rod of the blocking cylinder, a positioning member is connected to the piston rod of the positioning cylinder, the positioning cylinder and the positioning member are arranged on the front side of the conveying device, and the blocking cylinder and the blocking member are arranged on the rear side of the conveying device.

[0022] The pallet is placed on the conveyor chain, and the pallet is transported under the drive of the conveyor chain. When stacking is required, the positioning cylinder and the positioning member block and position the pallet at the front side of the handling device, and the blocking cylinder and the blocking member block the pallet at the rear side to prevent it from pushing forward against the pallet to be picked up, and then the pick-and-place mechanism can pick up the pallet. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the tray retracting and placing device of the utility model when multiple trays are stacked;

[0025] Figure 2 It is a structural schematic diagram of the handling device of the utility model;

[0026] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0027] Figure 4 It is a structural schematic diagram of the pick-and-place mechanism of the utility model;

[0028] Figure 5 It is a schematic structural diagram of the conveying device of the utility model.

[0029] In the accompanying drawings: 1-conveying device, 11-conveying frame, 12-conveying motor, 13-driving sprocket, 15-blocking cylinder, 151-blocking member, 16-positioning cylinder, 161-positioning member, 2-handling device, 21-frame, 211-stacked plate space, 3-left and right moving mechanism, 31-left and right slide, 32-left and right drive motor, 33-left and right drive gear, 34-left and right drive rack, 4-lifting and moving mechanism, 41-lifting slide bar, 42-lifting drive motor, 43-lifting drive gear, 44-lifting drive rack, 5-pick-and-place mechanism, 51-first pick-and-place seat, 52-suction cup, 53-first slide column, 531-first limit block, 54-first spring, 55-second pick-and-place seat, 56-second slide column, 561-second limit block, 57-second spring, 58-vacuum generator, 6-release plate trigger unit, 7-support plate.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of technical personnel in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] like Figures 1 to 5 As shown, a pallet folding and unfolding device includes a conveying device 1 and a handling device 2.

[0035] The conveying direction of the conveying device 1 is from back to front, and the pallet 7 without materials placed thereon is conveyed forward on the conveying device 1 .

[0036] The handling device 2 includes a fixed frame 21, on which a stacking space 211 for stacking pallets 7 is provided. The stacking space 211 and the conveying device 1 are arranged along the left-right direction. A left-right moving mechanism 3 is provided on the frame 21. A lifting and moving mechanism 4 is provided on the moving end of the left-right moving mechanism 3. A pick-up and placement mechanism 5 for picking up or putting down the pallet 7 is provided on the moving end of the lifting and moving mechanism 4. The pick-up and placement mechanism 5 is arranged on the upper side of the conveying device 1 and the stacking space 211. The left-right moving mechanism 3 can drive the pick-up and placement mechanism 5 to move along the left-right direction to move between the conveying device 1 and the stacking space 211. The lifting and moving mechanism 4 can drive the pick-up and placement mechanism 5 to move along the up-down direction.

[0037] The pallet 7 is transported forward on the conveying device 1. When the pallet 7 is transported to the side of the stacking space 211 of the handling device 2, the left and right moving mechanism 3 drives the lifting and moving mechanism 4 and the pick-and-place mechanism 5 to move to the upper side of the pallet 7 on the conveying device 1. The lifting and moving mechanism 4 drives the pick-and-place mechanism 5 to move downward. The pick-and-place mechanism 5 absorbs or clamps the pallet 7. The lifting and moving mechanism 4 drives the pick-and-place mechanism 5 upward to pick up the pallet 7 from the conveying device 1. Then the left and right moving mechanism 3 drives the pallet 7 to move to the stacking space 211. The pick-and-place mechanism 5 puts down the pallet 7 after being lifted to a suitable height. Multiple pallets 7 can be stacked in the stacking space 211; when the front side of the conveying device 1 needs the pallet 7 to circulate, the pick-and-place mechanism 5 moves to the stacking space 211 to pick up the pallet 7, and then moves to the conveying device 1 to put down the pallet 7. The pallet 7 can be transported forward on the conveying device 1 for circulation.

[0038] In this solution, when the front side of the conveying device 1 does not need the pallet 7 to circulate, the handling device 2 can take the pallet 7 from the conveying device 1 and stack it for storage, so that the pallet 7 located at the rear side of the conveying device 1 can be normally transported without stacking the pallet 7; when the front side of the conveying device 1 needs the pallet 7 to circulate, the handling device 2 can take the pallet 7 from the stacking space 211 and put it on the conveying device 1, and the pallet 7 can be transported forward to ensure production, thereby making the circulation of the pallet 7 smoother and meeting production needs. In the actual production process, the stacking and placing of pallets can be controlled according to the production situation.

[0039] In some specific embodiments, referring to Figure 4 The pick-and-place mechanism 5 includes a first pick-and-place seat 51, which is connected to the moving end of the lifting and moving mechanism 4. A plurality of suction cups 52 capable of generating negative pressure are provided on the lower side of the first pick-and-place seat 51. The plurality of suction cups 52 can suck up the support plate 7 under negative pressure. The plurality of suction cups 52 can be evenly distributed on the support plate 7, so that the force is evenly applied when the support plate 7 is picked up.

[0040] When the suction cup 52 is attached to the upper side of the pallet 7 and generates negative pressure, the suction cup 52 can suck the pallet 7, and when the suction cup 52 returns to normal pressure, the pallet 7 can be put down, which makes it convenient to pick up or put down the pallet 7. The suction position on the upper side of the pallet 7 is also convenient for picking up and putting down multiple pallets 7 when they are stacked. In other embodiments, the pick-and-place mechanism 5 can also pick up or put down the pallet 7 through a clamping claw structure.

[0041] Furthermore, a vacuum generator 58 is fixed on the first pick-and-place seat 51 , and the vacuum generator 58 is connected to the suction cup 52 through a pipeline. The vacuum generator 58 is connected to the suction cup 52 so that the suction cup 52 generates negative pressure.

[0042] Furthermore, a first slide post 53 is fixedly connected to the upper side of the suction cup 52, the first slide post 53 extends in the up-down direction, the first slide post 53 is slidably connected to the first pick-and-place seat 51 in the up-down direction, a first limit block 531 is provided on the upper side of the first slide post 53, the first limit block 531 is provided on the upper side of the first pick-and-place seat 51, a first spring 54 is sleeved on the first slide post 53, and the first spring 54 is provided between the first pick-and-place seat 51 and the suction cup 52.

[0043] When the suction cup 52 moves downward and sticks to the pallet 7, the first pick-and-place seat 51 will continue to move downward for a distance, and the suction cup 52 and the first slide column 53 will slide upward relative to the first pick-and-place seat 51 and compress the first spring 54 to ensure that multiple suction cups 52 can stick to and suck the pallet 7, so as to avoid that some suction cups 52 cannot suck the pallet 7 due to different heights of the suction cups 52, thereby reducing the overall suction force. After the pallet 7 is put down, the first slide column 53 and the suction cup 52 slide downward relative to the first pick-and-place seat 51 under the rebound action of the first spring 54, and the first limit block 531 can limit the first slide column 53 from falling out of the first pick-and-place seat 51 downward.

[0044] Furthermore, the pick-and-place mechanism 5 also includes a second pick-and-place seat 55, which is fixedly connected to the moving end of the lifting and moving mechanism 4, and a second slide column 56 is fixedly connected to the upper side of the second pick-and-place seat 55. The second slide column 56 extends in the up-down direction, and the second slide column 56 is slidably connected to the second pick-and-place seat 55 in the up-down direction. A second limit block 561 is provided on the upper side of the second slide column 56, and the second limit block 561 is provided on the upper side of the second pick-and-place seat 55. A second spring 57 is sleeved on the second slide column 56, and the second spring 57 is provided between the first pick-and-place seat 51 and the second pick-and-place seat 55.

[0045] The first pick-and-place seat 51 and the second pick-and-place seat 55 can slide relative to each other through the second slide post 56. When the suction cup 52 moves downward and sticks to the support plate 7, the first pick-and-place seat 51 and the second pick-and-place seat 55 will continue to move downward for a distance, and the suction cup 52 and the first slide post 53 will slide upward relative to the first pick-and-place seat 51 and compress the second spring 57. The first pick-and-place seat 51 will slide upward relative to the second pick-and-place seat 55, increasing the cushioning capacity of the suction cup 52 after sticking to the support plate 7, and further protecting the suction cup 52. After the support plate 7 is put down, the second slide post 56 and the first pick-and-place seat 51 slide downward relative to the second pick-and-place seat 55 under the rebound action of the second spring 57, and the second limit block 561 can limit the second slide post 56 from falling out of the second pick-and-place seat 55.

[0046] In some specific embodiments, referring to Figure 2 and Figure 3 The left-right moving mechanism 3 includes a left-right slide 31 and a left-right driving unit. The left-right slide 31 is slidably connected to the frame 21 along the left-right direction. The left-right driving unit is connected to the left-right slide 31 by transmission. The left-right slide 31 is the moving end of the left-right moving mechanism 3. The lifting and moving mechanism 4 includes a lifting slide bar 41 and a lifting and driving unit. The lifting slide bar 41 is slidably connected to the left-right slide 31 along the up-down direction. The lifting and driving unit is connected to the lifting slide bar 41 by transmission. The lifting slide bar 41 is the moving end of the lifting and moving mechanism 4. The pick-up and place mechanism 5 is arranged on the lower side of the lifting slide bar 41. The lifting slide bar 41 can move up and down, which can make more space for stacking boards. The left-right slide 31 can be slidably connected to the frame 21 through a slide rail slider, and the lifting slide bar 41 can be slidably connected to the left-right slide 31 through a slide rail slider.

[0047] In some specific embodiments, the left and right drive unit includes a left and right drive motor 32, a left and right drive gear 33 and a left and right drive rack 34, the left and right drive motor 32 is fixedly connected to the left and right slide 31, the left and right drive gear 33 is fixedly connected to the rotating shaft of the left and right drive motor 32, the left and right drive rack 34 extends in the left and right direction, the left and right drive rack 34 is fixedly connected to the frame 21, and the left and right drive gear 33 is meshed with the left and right drive rack 34; the lifting drive unit includes a lifting drive motor 42, a lifting drive gear 43 and a lifting drive rack 44, the lifting drive motor 42 is fixedly connected to the left and right slide 31, the lifting drive gear 43 is fixedly connected to the rotating shaft of the lifting drive motor 42, the lifting drive rack 44 extends in the up and down direction, the lifting drive rack 44 is fixedly connected to the lifting slide 41, and the lifting drive gear 43 is meshed with the lifting drive rack 44. In other embodiments, the left and right drive unit can also use a motion mechanism such as a screw rod, a synchronous wheel and a synchronous belt, and the lifting drive unit can also use a motion mechanism such as a screw rod.

[0048] In some specific embodiments, two stacking spaces 211 are provided on the frame 21, and the two stacking spaces 211 are respectively provided on the left and right sides of the conveying device 1. The two stacking spaces 211 can increase the number of stacked pallets 7 and increase the flexibility of the circulation of the pallets 7.

[0049] In some specific embodiments, the pallet storage and release device further includes a pallet release trigger unit 6, and the left-right moving mechanism 3, the lifting and moving mechanism 4, and the pick-up and release mechanism 5 are all connected to the pallet release trigger unit 6 by signal. When the pallet 7 needs to be circulated, the pallet release signal can be sent to the transport device 2 through the pallet release trigger unit 6, and the transport device 2 puts the pallet 7 on the conveying device 1 for circulation. The pallet release trigger unit 6 can be a control panel that sends signals according to a set program, or a button. When the operator needs the pallet 7, pressing the button can send the pallet 7.

[0050] In some specific embodiments, the number of the transport devices 2 is two or more, and all the transport devices 2 are arranged in the front-to-back direction. The two transport devices 2 can increase the number of stacked pallets 7, increase the operability of stacking and placing pallets, and increase the flexibility of the circulation of pallets 7.

[0051] In some specific embodiments, referring to Figure 5 The conveying device 1 includes a fixed conveying frame 11, a conveying motor 12 is fixedly connected to the conveying frame 11, a driving sprocket 13 and a driven sprocket (not shown in the drawings) are rotatably connected to the conveying frame 11, the driving sprocket 13 and the driven sprocket are arranged front to back, the driving sprocket 13 is transmission-connected to the conveying motor 12, and a conveying chain (not shown in the drawings) is wound around the driving sprocket 13 and the driven sprocket; a blocking cylinder 15 and a positioning cylinder 16 are provided on the conveying frame 11, a blocking member 151 is connected to the piston rod of the blocking cylinder 15, a positioning member 161 is connected to the piston rod of the positioning cylinder 16, the positioning cylinder 16 and the positioning member 161 are arranged on the front side of the handling device 2, and the blocking cylinder 15 and the blocking member 151 are arranged on the rear side of the handling device 2.

[0052] The pallet 7 is placed on the conveyor chain, and the pallet 7 is conveyed under the drive of the conveyor chain. When stacking is required, the positioning cylinder 16 and the positioning member 161 block and position the pallet 7 at the front side of the handling device 2, and the blocking cylinder 15 and the blocking member 151 block the pallet 7 at the rear side to prevent it from pressing forward against the pallet 7 to be picked up, and then the pick-and-place mechanism 5 can pick up the pallet 7.

[0053] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pallet retracting device, characterized in that: include: The conveying device (1) has a conveying direction from back to front; The handling device (2) comprises a fixedly arranged frame (21), the frame (21) being provided with a stacking space (211) for stacking pallets (7), the stacking space (211) and the conveying device (1) being arranged in the left-right direction, the frame (21) being provided with a left-right moving mechanism (3), the moving end of the left-right moving mechanism (3) being provided with a lifting and moving mechanism (4), the moving end of the lifting and moving mechanism (4) being provided with a pick-up and place mechanism (5) for picking up or putting down the pallet (7), the pick-up and place mechanism (5) being arranged on the upper side of the conveying device (1) and the stacking space (211), the left-right moving mechanism (3) being able to drive the pick-up and place mechanism (5) to move in the left-right direction so as to move between the conveying device (1) and the stacking space (211), and the lifting and moving mechanism (4) being able to drive the pick-up and place mechanism (5) to move in the up-down direction.

2. The pallet retracting device according to claim 1, characterized in that: The pick-and-place mechanism (5) comprises a first pick-and-place seat (51), the first pick-and-place seat (51) is connected to the moving end of the lifting and moving mechanism (4), and a plurality of suction cups (52) capable of generating negative pressure are provided on the lower side of the first pick-and-place seat (51), and the plurality of suction cups (52) can suck up the support plate (7) under negative pressure.

3. The pallet retracting device according to claim 2, characterized in that: A first slide post (53) is fixedly connected to the upper side of the suction cup (52), the first slide post (53) extends in the up-down direction, the first slide post (53) is slidably connected to the first pick-and-place seat (51) in the up-down direction, a first limit block (531) is provided on the upper side of the first slide post (53), the first limit block (531) is arranged on the upper side of the first pick-and-place seat (51), a first spring (54) is sleeved on the first slide post (53), and the first spring (54) is arranged between the first pick-and-place seat (51) and the suction cup (52).

4. The pallet stowing and unscrewing device according to claim 2, characterized in that: The pick-and-place mechanism (5) further comprises a second pick-and-place seat (55), the second pick-and-place seat (55) being fixedly connected to the moving end of the lifting and moving mechanism (4), a second slide column (56) being fixedly connected to the upper side of the second pick-and-place seat (55), the second slide column (56) extending in the up-down direction, the second slide column (56) and the second pick-and-place seat (55) being slidably connected in the up-down direction, a second limit block (561) being provided on the upper side of the second slide column (56), the second limit block (561) being provided on the upper side of the second pick-and-place seat (55), a second spring (57) being sleeved on the second slide column (56), the second spring (57) being provided between the first pick-and-place seat (51) and the second pick-and-place seat (55).

5. The pallet stowing and unscrewing device according to claim 1, characterized in that: The left-right moving mechanism (3) comprises a left-right slide (31) and a left-right driving unit. The left-right slide (31) is slidably connected to the frame (21) along the left-right direction. The left-right driving unit is transmission-connected to the left-right slide (31). The left-right slide (31) is the moving end of the left-right moving mechanism (3). The lifting and moving mechanism (4) comprises a lifting and sliding rod (41) and a lifting and driving unit. The lifting and sliding rod (41) is slidably connected to the left-right slide (31) along the up-down direction. The lifting and driving unit is transmission-connected to the lifting and sliding rod (41). The lifting and sliding rod (41) is the moving end of the lifting and moving mechanism (4). The picking and placing mechanism (5) is arranged on the lower side of the lifting and sliding rod (41).

6. The pallet stowing and unsettling device according to claim 5, characterized in that: The left and right drive units include left and right drive motors (32), left and right drive gears (33) and left and right drive racks (34); the left and right drive motors (32) are fixedly connected to the left and right slide seats (31); the left and right drive gears (33) are fixedly connected to the rotating shafts of the left and right drive motors (32); the left and right drive racks (34) extend in the left and right directions; the left and right drive racks (34) are fixedly connected to the frame (21); and the left and right drive gears (33) are meshedly connected to the left and right drive racks (34); The lifting drive unit comprises a lifting drive motor (42), a lifting drive gear (43) and a lifting drive rack (44); the lifting drive motor (42) is fixedly connected to the left and right slide seats (31); the lifting drive gear (43) is fixedly connected to the rotating shaft of the lifting drive motor (42); the lifting drive rack (44) extends in the up-down direction; the lifting drive rack (44) is fixedly connected to the lifting slide bar (41); and the lifting drive gear (43) is meshedly connected to the lifting drive rack (44).

7. The pallet stowing and unscrewing device according to claim 5, characterized in that: The frame (21) is provided with two plate stacking spaces (211), and the two plate stacking spaces (211) are respectively arranged on the left and right sides of the conveying device (1).

8. The pallet folding and unfolding device according to claim 1, characterized in that: The tray retracting and releasing device also includes a tray trigger unit (6), and the left-right moving mechanism (3), the lifting and moving mechanism (4) and the taking and placing mechanism (5) are all connected to the tray trigger unit (6) by signals.

9. The pallet folding and unfolding device according to claim 1, characterized in that: The number of the transport devices (2) is two or more, and all the transport devices (2) are arranged along the front-to-back direction.

10. The pallet folding and unfolding device according to claim 1, characterized in that: The conveying device (1) comprises a fixed conveying frame (11), a conveying motor (12) is fixedly connected to the conveying frame (11), a driving sprocket (13) and a driven sprocket are rotatably connected to the conveying frame (11), the driving sprocket (13) and the driven sprocket are arranged front and back, the driving sprocket (13) is transmission-connected to the conveying motor (12), and a conveying chain is wound around the driving sprocket (13) and the driven sprocket; The conveying frame (11) is provided with a blocking cylinder (15) and a positioning cylinder (16); the piston rod of the blocking cylinder (15) is connected to a blocking member (151); the piston rod of the positioning cylinder (16) is connected to a positioning member (161); the positioning cylinder (16) and the positioning member (161) are arranged on the front side of the conveying device (2); and the blocking cylinder (15) and the blocking member (151) are arranged on the rear side of the conveying device (2).

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