CN112125205A

CN112125205A - Folding disc disassembling device and folding disc disassembling equipment

Info

Publication number: CN112125205A
Application number: CN202010973222.7A
Authority: CN
Inventors: 徐海栋; 范晋; 张陶; 夏志军; 周树华; 孔杰杰; 陈海伦; 尤浩; 蔡琦; 嵇筱菁; 王璞
Original assignee: Glory Intelligence Technology Kunshan Co Ltd
Current assignee: Glory Intelligence Technology Kunshan Co Ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2020-12-25
Anticipated expiration: 2040-09-16
Also published as: CN112125205B

Abstract

The invention belongs to the technical field of automatic production, and discloses an unfolding and folding disc device and an unfolding and folding disc device, wherein the unfolding and folding disc device comprises: a frame having a working space formed therein; the pair of forks are respectively arranged on two sides of the rack, and each fork is provided with a first working position extending into the working space and a second working position moving out of the working space; a drive mechanism configured to drive a pair of the forks to be simultaneously switched between the first operating position and the second operating position; and a lifting mechanism configured to simultaneously lift a pair of the forks. The tray disassembling and stacking device provided by the invention is simple in structure, the pallet fork can be switched between the first working position and the second working position under the driving of the driving mechanism, so that the loading and the releasing of the tray are realized, the action process is simple, and the tray disassembling and stacking functions can be realized through different operation actions, so that the application range of the tray disassembling and stacking device is expanded.

Description

Folding disc disassembling device and folding disc disassembling equipment

Technical Field

The invention relates to the technical field of automatic production, in particular to an unfolding and folding disc device and an unfolding and folding disc device.

Background

Trays (also called material trays, carrying trays, etc.) are carriers for holding materials or products, and in order to save storage space, the trays are generally configured to be stackable and can be stacked when not needed to hold materials for transferring. When the trays are needed to be taken for placing the products or materials, the stacked trays are disassembled for use.

For example, in the logistics transportation and sorting operation, the trays are generally used for bearing goods to meet the requirement of goods entering or leaving a three-dimensional warehouse, and in the operation process, the trays to be used or produced need to be conveyed to a required station through a tray disassembling and folding device after the trays are automatically disassembled, or the trays are stacked and then output and stored in the warehouse or cached in the warehouse through the trays.

However, the existing device for splitting or stacking the trays is complex in structure, large in volume and weight, incapable of achieving the functions of splitting and stacking the trays, and low in production efficiency.

Therefore, there is a need for a disk folding and unfolding device which has a simple structure and is suitable for both disk folding and unfolding operations.

Disclosure of Invention

The invention aims to provide an unfolding and folding disc device and an unfolding and folding disc device.

In order to achieve the purpose, the invention adopts the following technical scheme:

an unfolding and folding disc device comprises a rack, a pair of forks, a driving mechanism and a lifting mechanism; an operation space is formed inside the frame; the pair of forks are respectively arranged on two sides of the rack, and the forks are provided with a first working position extending into the working space and a second working position moving out of the working space; a drive mechanism configured to drive a pair of the forks to be simultaneously switched between the first operating position and the second operating position; the lifting mechanism is configured to simultaneously lift a pair of the forks;

wherein each of the forks includes:

the frame is connected with the rack in a sliding manner and is fixedly connected with the movable end of the lifting mechanism;

the first fork plate and the second fork plate are arranged on the frame and can rotate along a fixed rotating shaft, and the bearing surfaces of the first fork plate and the second fork plate are arranged at the same height; and

and two ends of the connecting rod are respectively hinged with the first fork plate and the second fork plate.

Preferably, the hinge point of the connecting rod and the first fork plate and the hinge point of the connecting rod and the second fork plate are not coincident with the rotating shaft of the first fork plate and the rotating shaft of the second fork plate.

Preferably, the fork is configured such that when the fork is switched from the first operating position to the second operating position, the first fork plate and the second fork plate rotate towards each other.

Preferably, the driving mechanism comprises a gear motor, the gear motor is fixed to the frame, and a gear meshed with an output end of the gear motor is arranged on a rotating shaft of the first fork plate or the second fork plate.

Preferably, both sides of the frame are slidably connected to the frame, respectively.

Preferably, a detection element is arranged on the frame, and the detection element is configured to detect a tray placed on the first fork plate and/or the second fork plate.

Preferably, the elevating mechanism includes:

the two pairs of chain wheels are respectively arranged at the upper end and the lower end of the two sides of the rack;

the pair of chains is respectively connected between the two pairs of chains positioned on the same side of the rack, and the two ends of the pair of chains are respectively fixedly connected with the pair of frames;

and the driving part is configured to synchronously drive the two chain wheels positioned on the two sides of the rack to rotate forwards or reversely.

Preferably, the driving part includes:

a drive motor;

the speed reducer is provided with two coaxial output ends;

and the pair of transmission rods are respectively coupled with the two output ends of the speed reducer and are respectively coupled with the two chain wheels positioned on the two sides of the rack.

Preferably, the rack comprises a first portal frame and a second portal frame which are arranged oppositely, the first portal frame and the second portal frame respectively comprise a pair of columns and a beam for connecting the columns, a fixed rod is connected between the columns opposite to the portal frames, a reinforcing rod is connected to the joint of the fixed rod and the columns, the fixed rod and the reinforcing rod form a triangular structure.

In order to achieve the purpose, the invention also adopts the following technical scheme:

an unstacked tray apparatus comprising:

a transport mechanism configured to transport the tray; and

as described above, the transfer mechanism passes through the working space of the folding disc device.

The invention has the beneficial effects that:

the tray disassembling and stacking device provided by the invention is simple in structure, the pallet fork can be switched between the first working position and the second working position under the driving of the driving mechanism, so that the loading and the releasing of the tray are realized, the action process is simple, and the tray disassembling and stacking functions can be realized through different operation actions, so that the application range of the tray disassembling and stacking device is expanded.

Drawings

FIG. 1 is a front view of a unstacked tray device in an embodiment of the present invention;

FIG. 2 is a top view of an embodiment of the invention showing an unfolding disk apparatus;

FIG. 3 is a side view of an embodiment of the invention showing an unfolding disk apparatus;

FIG. 4 is a schematic structural diagram of the first fork plate, the second fork plate, the connecting rod and the driving mechanism according to the embodiment of the invention;

FIG. 5 is a schematic structural view of an embodiment of the present invention with the forks in a second operating position;

FIG. 6 is a schematic illustration of the embodiment of the present invention with the forks in a first operating position;

FIG. 7 is a schematic structural view of a frame in an embodiment of the present invention;

fig. 8 is a front view of a housing in an embodiment of the invention.

In the figure:

100. a tray; 101. a tray body; 102. heightening the bottom feet; 200. a transport mechanism; 300. an unfolding and folding disk device;

1. a frame; 11. a first gantry; 12. a second gantry; 13. fixing the rod; 14. a reinforcing bar;

2. a pallet fork; 21. a frame; 211. a cross arm; 212. a trailing arm; 213. a slider; 214. a cable; 22. a first fork plate; 23. a second yoke plate; 24. a connecting rod;

3. a drive mechanism;

4. a lifting mechanism; 41. a sprocket; 42. a chain; 43. a drive section; 431. a drive motor; 432. a speed reducer; 433. and a transmission rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

This embodiment provides an open and fold a set equipment, should open and fold a set equipment and be applicable to stacking and disassembling of tray to specifically set up in the end to end both ends of the production line of transporting the machined part with the tray, with input tray one by one to the input of this production line, or collect and fold the tray of production line output, thereby transport materials such as goods, machined part through the tray.

Specifically, the unstacking tray apparatus includes a transfer mechanism 200 and an unstacking tray device 300. The transfer mechanism 200 is configured as a conveying tray, which may be a conveyor belt, a roller belt, etc. abutting against the processing line, or may be a partial transfer mechanism 200 at the head and tail ends of the production line, that is, the folding disc device 300 is directly disposed at the head and tail ends of the transfer mechanism 200 of the production line, and the transfer mechanism 200 specifically passes through the working space of the folding disc device 300, so as to facilitate the folding disc device 300 to output or receive the tray output by the transfer mechanism 200 to or from the transfer mechanism 200.

Referring to fig. 1 to 8, the folding plate device 300 is described in detail, and the folding plate device 300 includes a frame 1, a pair of forks 2, a driving mechanism 3, and a lifting mechanism 4. The frame 1 forms the above-mentioned working space capable of passing through the transfer mechanism 200. A pair of fork 2 sets up respectively in the both sides of frame 1, and fork 2 has the first operating position who stretches into the operation space and moves out the second operating position of operation space. The drive mechanism 3 is configured to drive the pair of forks 2 to be switched simultaneously between the first operating position and the second operating position. The lifting mechanism 4 is configured to simultaneously lift the pair of forks 2.

When the tray disassembling and stacking device 300 is applied to tray disassembling operation, the pair of forks 2 are matched with the first working position to bear stacked trays, when the trays need to be output to the transmission mechanism 200, the lifting mechanism 4 drives the pair of forks 2 to descend, so that the whole trays are placed on the surface of the transmission mechanism 200, and at the moment, the transmission mechanism 200 stops or blocks the whole trays by other blocking mechanisms, so that the whole trays are kept unchanged in position; subsequently, the driving mechanism 3 drives the pair of forks 2 to switch to the second working position to move out of the working space; then, the lifting mechanism 4 drives the pair of forks 2 to ascend to the height of a single tray, the driving mechanism 3 drives the pair of forks 2 to switch back to the first working position again, and the pair of forks 2 are inserted between the lowest tray in the whole tray and the second tray from bottom to top adjacent to the lowest tray; finally, the pair of forks 2 are driven by the lifting mechanism 4 to ascend, so that the two pallets are separated, and the single pallet can be sent out by the conveying mechanism 200.

When the folding tray device 300 is applied to a stacking operation, the transfer mechanism 200 transfers the tray to the operation space of the folding tray device 300, and the transfer mechanism 200 stops or blocks the tray by other blocking mechanisms to keep the tray unchanged; the lifting mechanism 4 firstly drives the pair of the forks 2 at the first working position to descend, so that the pallets which are already stacked on the forks 2 are stacked above the pallets; then, the driving mechanism 3 drives the pair of forks 2 to switch to the second working position, so that the fork 2 removing working space extends below the bottom surface of the pallet; then, the lifting mechanism 4 drives the pair of forks 2 to descend again by the height of a single pallet, and the driving mechanism 3 drives the pair of forks 2 to switch back to the first working position again, so that the pair of forks 2 are inserted below the pallet; finally, the lifting mechanism 4 drives the pair of forks 2 to ascend, so that the whole pallet containing the pallet is separated from the conveying mechanism 200, and the stacking operation of the pallets is completed.

By means of the structure, the tray disassembling and stacking device 300 is simple in structure, the pallet fork 2 can be switched between the first working position and the second working position under the driving of the driving mechanism 3, the tray can be loaded and released, the action process is simple, and the tray disassembling and stacking function can be realized through different operation actions of the tray disassembling and stacking device 300, so that the application range of the tray disassembling and stacking device is expanded.

It will be appreciated that to accommodate insertion of the forks 2 under a single pallet or between two pallets, the pallets should be configured to form a space between each other into which the forks 2 can be inserted after stacking, for example as shown in fig. 1, the pallets may include a pallet body 101 and a raised foot 102 located below the pallet body 101, the respective pallets being fitted with mating sockets on the foot and the pallet lift that partially receive the foot, such that when two pallets are stacked, the pallet body 101 rests of the two pallets forming a space that is suitable for insertion of the forks 2.

To form the switching action of the first and second operating positions described above, in the present embodiment, each fork 2 includes a frame 21, a first fork plate 22, a second fork plate 23, and a link 24. The frame 21 is slidably connected to the frame 1 and fixedly connected to a movable end of the lifting mechanism 4 so as to be slidably guided by the frame 1. The first fork plate 22 and the second fork plate 23 are both disposed on the frame 21 and can rotate along a fixed rotating shaft, and the bearing surfaces of the first fork plate 22 and the second fork plate 23 are disposed at the same height. Two ends of the connecting rod 24 are respectively hinged with the first fork plate 22 and the second fork plate 23, and the hinged point of the connecting rod 24 and the first fork plate 22 and the second fork plate 23 is not overlapped with the rotating shaft of the first fork plate 22 and the second fork plate 23.

Referring to fig. 4 to 6, taking the rotation axis of the first fork 22 in transmission connection with the driving mechanism 3 as an example, and taking the second working position shown in fig. 5 as the initial state of the fork 2, when the fork 2 is switched to the first working position, the driving mechanism 3 drives the first fork 22 at the lower part in fig. 5 to rotate counterclockwise, because the hinge axis of the link 24 and the first fork 22 and the rotation axis of the first fork 22 are eccentrically arranged, and because the hinge axis of the link 24 and the second fork 23 and the rotation axis of the second fork 23 are eccentrically arranged, the rotation of the first fork 22 can drive the link 24 to rotate counterclockwise toward the lower left in fig. 5, and further the link 24 drives the second fork 23 to rotate, so that the fork 2 is switched to the first working position shown in fig. 6. Conversely, the driving mechanism 3 drives the first fork plate 22 in reverse, i.e. the fork 2 can be switched back to the second operating position shown in fig. 5.

Preferably, the fork 2 is configured such that when switched from the first to the second operating position, the first fork plate 22 and the second fork plate 23 rotate towards each other to achieve a smaller space occupation. Specifically, referring to fig. 6, in order to achieve the above purpose, the hinge point of the connecting rod 24 and the second fork plate 23 is located at a side of the rotating shaft of the second fork plate 23 facing the first pallet fork 2, and the hinge point of the connecting rod 24 and the first fork plate 22 is offset to a side close to the inside of the folding disc device 300 than the hinge point of the connecting rod 24 and the second fork plate 23, so as to ensure that the rotating directions of the first fork plate 22 and the second fork plate 23 are opposite, which serves the above purpose of rotatably receiving the first fork plate 22 and the second fork plate 23 therebetween.

The driving mechanism 3 may be a rotating cylinder or other component capable of driving the first fork 22 to rotate. In some work sites without an air source, the driving mechanism 3 is preferably an electric driving mechanism, for example, the driving mechanism 3 may include a gear motor fixed to the frame 21, a gear engaged with an output end of the gear motor is provided on a rotating shaft of the first fork 22 or the second fork 23, and the pallet fork 2 may be stably switched between the first working position and the second working position at a low speed by rotating the gear motor at a low speed and by reducing the speed by a gear ratio between gears.

It can be understood that, in the present embodiment, the two driving mechanisms 3 are respectively fixed on the two frames 21 of the two forks 2, and the two driving mechanisms 3 are simultaneously started and stopped, so as to achieve the purpose of simultaneously switching the working positions of the two forks 2.

Preferably, the frame 21 is slidably connected to the frame 1 at both sides thereof. Specifically. The both sides that lie in two frames 21 on frame 1 all are provided with the guide rail or the spout of vertical extension, and the both sides correspondence of frame 21 be provided with a pair of guide rail or spout sliding connection's slider 213 to realize the two guide structure of frame 21 both sides, reduced the required width space of frame 21, and improve the stability that frame 21 goes up and down.

As shown in fig. 7, in the present embodiment, the frame 21 generally includes a pair of cross arms 211 and a pair of trailing arms 212 connected to both ends of the pair of cross arms 211, respectively, the upper and lower ends of the trailing arms 212 are provided with sliders 213 to which the rack 1 is slidably connected, and the first fork plate 22 and the second fork plate 23 are connected to any one of the pair of cross arms 211. Both the cross arm 211 and the trailing arm 212 may be made of commercially available pieces such as profiles or channel steels.

Referring to fig. 1 to 3, in the present embodiment, the lifting mechanism 4 includes two pairs of sprockets 41, a pair of chains 42 and a driving portion 43. The two pairs of chain wheels 41 are respectively and rotatably arranged at the upper end and the lower end of the two sides of the frame 1, and the rotating shaft is horizontally arranged. The pair of chains 42 are respectively connected between the two pairs of chain wheels 41 positioned on the same side of the frame 1, and both ends of the pair of chains 42 are respectively fixedly connected with the pair of frames 21. The driving part 43 is configured to synchronously drive the two sprockets 41 located at both sides of the frame 1 to rotate in the forward or reverse direction.

Specifically, referring to fig. 7, the two cross arms 211 of the frame 21 are respectively provided with a pulling cable 214 connected to the sprocket 41, and the pulling cables 214 are preferably configured to be adjustable in position up and down to tension the chain 42.

The driving portion 43 preferably includes a driving motor 431, a speed reducer 432 and a pair of transmission rods, and the driving motor 431 is preferably disposed inside the bottom of the rack 1, which can save the space occupied by the folding disk device 300, and can lower the center of gravity of the device, so that the folding disk device 300 is more stable than when disposed on the top of the rack 1. The reducer 432 is also disposed inside the bottom of the frame 1, and has an input end connected to the driving motor 431 and two coaxial output ends. The pair of transmission rods 433 are respectively coupled to two output ends of the speed reducer 432 and are respectively coupled to two chain wheels 41 located on two sides of the rack 1, so that when the driving motor 431 drives the speed reducer 432 to rotate, the two output ends of the speed reducer 432 synchronously drive the two transmission rods 433 to rotate, and further drive the two chain wheels 41 located on two sides of the bottom of the rack 1 to rotate, thereby realizing the rotation of the two chains 42, i.e., enabling the two forks 2 to perform lifting operation.

Naturally, in other alternative embodiments, based on the load requirement of the lifting mechanism 4, other lifting mechanisms 4 based on a screw rod module and the like may also be adopted, for example, in an operation occasion with a high requirement on the lifting positioning precision, the screw rod module may be preferably adopted to drive the pallet fork 2 to lift, and in order to improve the bearing capacity of the screw rod module, a screw rod with trapezoidal threads may also be preferably adopted as a screw rod component of the screw rod module. In this embodiment, the transmission structure of the chain 42 and the chain wheel 41 has the advantages of good spacing loading and lifting positioning accuracy, and is suitable for various application occasions.

In order to facilitate the knowledge of whether the tray folding device 300 is empty or not during the tray folding operation, the frame 21 may be provided with a detecting element configured to detect the trays placed on the first fork plate 22 and/or the second fork plate 23.

For example, the detecting element may be a correlation type photoelectric switch, and the detecting light of the correlation type photoelectric switch is set to be just above the surface of the first fork 22, so that whether the tray is placed on the surface of the first fork 22 can be detected.

Of course, in other alternative embodiments, the detecting element may also be a pressure sensor or a contact proximity switch or the like disposed on the first fork plate 22 and/or the second fork plate 23, so as to determine whether the tray is placed on the surface of the first fork plate 22 by determining the magnitude of the detected pressure of the pressure sensor or whether the contact proximity switch is triggered by the tray as a detection signal.

In the stacking operation, the information to be known is mainly whether the tray stacking apparatus 300 is fully loaded, and correspondingly, if the above-mentioned opposed photoelectric switch is adopted, the opposed photoelectric switch may be disposed at the top of the rack 1, so that the detection light is set to the height position of the uppermost tray of the fork 2 when the fork 2 is fully loaded. Of course, in other alternative embodiments, the detecting element may also use a pressure sensor disposed on the first fork plate 22 and/or the second fork plate 23 to convert the actual load of the fork 2 by the magnitude of the detected pressure of the pressure sensor.

As shown in fig. 8, in this embodiment, the rack 1 includes a first portal frame 11 and a second portal frame 12 which are oppositely arranged, each of the first portal frame 11 and the second portal frame 12 includes a pair of columns and a beam connecting the pair of columns, a fixing rod 13 is connected between the columns of the first portal frame 11 and the second portal frame 12, a reinforcing rod 14 is connected at a joint of the fixing rod 13 and the columns, the fixing rod 13 and the reinforcing rod 14 form a triangular structure, so that the rack 1 has sufficient structural strength and self stability.

Preferably, the fixing rod 13 and the reinforcing rod 14 are preferably disposed at the lower portion of the rack 1, so that the height of the folding tray device 300 is greatly reduced compared to the case where the fixing structure is disposed at the top of the rack 1, the structure is simplified, and the upper portion of the rack 1 is opened, so that the physical space constraint is not generated on the number of trays carried by the folding tray device 300, and the application range is wider.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An unfolding and folding disc device is characterized by comprising a rack (1), a pair of forks (2), a driving mechanism (3) and a lifting mechanism (4), wherein a working space is formed inside the rack (1), the forks (2) are respectively and movably arranged on two sides of the rack (1), the forks (2) are provided with a first working position extending into the working space and a second working position moving out of the working space, the driving mechanism (3) is configured to drive the forks (2) to be switched between the first working position and the second working position, and the lifting mechanism (4) is configured to simultaneously lift the forks (2);

wherein each fork (2) comprises:

the frame (21) is connected with the rack (1) in a sliding manner and is fixedly connected with the movable end of the lifting mechanism (4);

the first fork plate (22) and the second fork plate (23) are rotatably arranged on the frame (21), and bearing surfaces of the first fork plate (22) and the second fork plate (23) are arranged at the same height; and

and two ends of the connecting rod (24) are respectively hinged with the first fork plate (22) and the second fork plate (23).

2. The unfolding disk apparatus according to claim 1, wherein the hinge point of said connecting rod (24) to said first fork plate (22) and said second fork plate (23) is not coincident with the rotation axis of said first fork plate (22) and said second fork plate (23).

3. Folding disc arrangement according to claim 1, characterized in that the forks (2) are arranged to rotate the first fork plate (22) and the second fork plate (23) towards each other when switching from the first operating position to the second operating position.

4. Folding disc device according to claim 1, characterized in that the drive mechanism (3) comprises a gear motor which is fixed to the frame (21), and that the shaft of the first fork plate (22) or the second fork plate (23) is provided with a gear which meshes with the output of the gear motor.

5. The unfolding disk apparatus according to claim 1, wherein both sides of said frame (21) are slidably connected to said frame (1), respectively.

6. Folding tray device according to claim 1, characterized in that a detection element is arranged on the frame (21), which detection element is configured to detect a tray (100) placed on the first fork plate (22) and/or the second fork plate (23).

7. The unfolding disk apparatus according to claim 7, wherein said lifting mechanism (4) comprises:

two pairs of chain wheels (41) are respectively arranged at the upper end and the lower end of the two sides of the rack (1);

the pair of chains (42) are respectively connected between the two pairs of chains (42) positioned on the same side of the rack (1), and two ends of each pair of chains (42) are respectively fixedly connected with the pair of frames (21);

a driving part (43) configured to synchronously drive the two chain wheels (41) positioned at two sides of the frame (1) to rotate forwards or reversely.

8. The folding disc device according to claim 7, wherein the drive portion (43) includes:

a drive motor (431);

a reducer (432) having two coaxial output ends;

and the pair of transmission rods (433) are respectively coupled with the two output ends of the speed reducer (432) and are respectively coupled with the two chain wheels (41) positioned on the two sides of the rack (1).

9. The unfolding disc device according to claim 1, wherein the rack (1) comprises a first portal frame (11) and a second portal frame (12) which are arranged oppositely, each of the first portal frame (11) and the second portal frame (12) comprises a pair of uprights and a beam connecting the uprights, a fixing rod (13) is connected between the uprights opposite to the pair of portals, a reinforcing rod (14) is connected to the joint of the fixing rod (13) and the uprights, the fixing rod (13) and the reinforcing rod (14) form a triangular structure.

10. An unstacked tray apparatus comprising:

a transport mechanism (200) configured to transport the tray (100); and

the folding tray arrangement according to any of claims 1-9, said transport mechanism (200) passing through the working space of said folding tray arrangement (300).