Device for separating trays into boxes one by one

Abstract

The utility model discloses a device for separating boxes of pallets one by one, belonging to the field of automation technology. The device comprises a frame, a box separation structure, a discharging conveyor belt, a feeding conveyor belt, an upper photoelectric sensor, a lower photoelectric sensor and two pneumatic pallets, wherein the box separation structure comprises a spiral column and a plurality of limit fixture rods; the rear end of the feeding conveyor belt is located in the adjacent front of the box separation structure; the two pneumatic pallets are respectively located on the left and right sides of the upper part of the box separation structure, and can move toward or away from each other; when the two pneumatic pallets are in a separated state, they are located outside the area surrounded by the limit fixture rods; when the two pneumatic pallets are in a facing state, they move to the area surrounded by the limit fixture rods; the upper photoelectric sensor is located adjacent to the upper side of the pneumatic pallet; if there is no pallet on the pneumatic pallet, the feeding conveyor belt outputs a stack of pallets backwards; the lower photoelectric sensor is located in the middle between the spiral column and the pneumatic pallet; if the height of the pallet at the bottom of the box separation structure is lower than the lower photoelectric sensor, the pneumatic pallet moves away from each other.

Description

Technical Field

[0001] The utility model belongs to the field of automation technology, and particularly relates to a device for separating boxes one by one on a tray. Background Art

[0002] In sanitary products, different parts (such as tweezers, disinfection tablets, wires, etc.) can be placed in different areas of the tray. The tray is usually a rectangular structure with a convex edge on the top and a special-shaped structure at the bottom (with multiple grooves for partitioning, and the depth of each area may be inconsistent). Trays are one of the commonly used packaging items. In order to reduce the volume occupied by the material box, the tray is usually designed to be stackable. In order to store and manage trays in batches, improve space utilization and work efficiency. However, the tray must be in a separated state when in use. That is, the tray must be separated from the stacked state before use. Therefore, in scenarios where it is necessary, manual box separation may be performed, or a box separation device may be used.

[0003] For example, the patent with application number CN201820287869.2 discloses a production line for packaging articles, wherein the box separation mechanism includes upper and lower cylinders, a workbench, left and right cylinders, a platform, a vacuum swing arm and a suction cup. The platform is installed at the front end of the main conveyor line, and multiple stacked packaging boxes are placed on the platform. A top plate is provided on the top of the platform, and multiple guard bars are provided between the top plate and the platform. A workbench is installed below the platform, and the workbench is driven by the upper and lower cylinders to move up and down relative to the platform. Left and right cylinders are installed on the workbench, and the output ends of the left and right cylinders are hinged to the vacuum swing arm through a rotating shaft. The middle part of the vacuum swing arm is also hinged to the workbench through a pin shaft, so that the vacuum swing arm forms a lever structure, and a suction cup is installed at the end of the vacuum swing arm, and the position of the suction cup corresponds to the packaging box at the bottom layer. Several spiral columns are installed below the platform corresponding to the side position of the packaging box, and the top convex edge of the packaging box is inserted into the spiral groove of the spiral column.

[0004] For example, the patent with application number CN202121414441.8 discloses an automatic box separation and box dropping mechanism, including a frame, on which are arranged four box separation components, a box release component, a driving device and a limit component, the driving device is dynamically connected to the box separation component, the limit component is limitedly arranged around the box placement position of the frame, and the box release component is arranged on the frame and can be actuated to fit in the cam slide. The box separation component includes a spiral box dropping block, a box separation block and a slide cam block coaxially arranged through a rotating shaft, a spiral groove is arranged on the outer periphery of the spiral box dropping block, and a cam slide is arranged on the outer periphery of the slide cam block.

[0005] For example, the patent with application number CN202210216156.8 discloses a device for unloading and discharging food boxes one by one, comprising: a bracket, on which is provided a food box dropping port; a food box support and box separation mechanism, which comprises a plurality of vertical rotating shafts rotatably arranged on the bracket, spiral support plates arranged on the outer walls of the vertical rotating shafts for supporting the food boxes, and a synchronous drive actuator for driving the vertical rotating shafts to rotate synchronously, wherein the vertical rotating shafts are distributed around the food box dropping port, and the spiral support plates extend in a spiral along the axial direction of the vertical rotating shafts. The edge of the box opening of the food box has an annular flange extending outward, and the food boxes on the food box support and the box dividing mechanism are stacked in sequence from top to bottom, and are supported on the spiral support pieces of each vertical rotating shaft through the annular flange of the lowest food box; during the rotation of the vertical rotating shaft, when the annular flange of a food box located at the bottom of the food boxes stacked in sequence from top to bottom is separated from the spiral support piece, the annular flange of the food box located next lower will be supported on the spiral support pieces of each vertical rotating shaft.

[0006] It can be seen from the above patents that the existing box separation device includes a frame, a box separation structure on the frame, and a discharging conveyor belt directly below the box separation structure and arranged in the front-to-back direction, etc. The box separation structure includes four vertically arranged spiral columns and multiple limit fixture rods (specifically, it can include four straight fixture rods and four L-shaped fixture rods); the four spiral columns are located at the bottom of the limit fixture rods, and are provided with spiral grooves that cooperate with the convex edge of the pallet. Multiple limit fixture rods are arranged around the pallet, which are located on the adjacent outer sides of the four sides of the pallet, and they enclose a rectangular area for placing the pallet.

[0007] The applicant found the following problems when using the existing box-splitting device: the stacked pallets need to be manually placed into the rectangular area (from the top of the rectangular area), and in order to store enough pallets, the height of the rectangular area is usually designed to be large, which makes it inconvenient for the operator to place the pallets. In addition, even if the rectangular area is designed to be very high, the number of pallets placed in the box-splitting structure is limited, and usually an operator is required to stay next to the box-splitting device and add pallets to the box-splitting structure from time to time. Utility Model Content

[0008] In order to solve the above problems, the embodiment of the utility model provides a device for separating trays one by one. The operator only needs to place the trays side by side on the feeding conveyor belt. The feeding conveyor belt can be set lower, which is convenient for placing and can accommodate more trays. The operator does not need to stay by the separating device for a long time. The technical solution is as follows:

[0009] The utility model embodiment provides a device for separating trays one by one, which includes a frame, a separation box structure on the frame and a discharge conveyor belt 1 directly below the separation box structure and arranged in the front-to-back direction, wherein the separation box structure includes four vertically arranged spiral columns 2 and multiple limiting fixture rods 3; the four spiral columns 2 are located at the bottom of the limiting fixture rods 3, which are provided with spiral grooves that cooperate with the convex edges of the trays 4; multiple limiting fixture rods 3 are arranged around the trays 4 and are located at the adjacent outer sides of the four sides of the trays 4; the device also includes a feeding conveyor belt 5, an upper photoelectric sensor 6, a lower photoelectric sensor 7 and two pneumatic support plates 8 driven synchronously; the feeding conveyor belt 5 is arranged in the front-to-back direction, and its rear end is located adjacent to the front of the upper part of the separation box structure, which is controlled by the upper photoelectric sensor 6, and multiple stacks of trays 4 are placed side by side on it; the limiting fixture rod 3 on the front side of the separation box structure is located adjacent to the lower part of the feeding conveyor belt 5, and the limiting fixtures on the rear, left and right sides of the separation box structure are arranged. The rod 3 extends upward relative to the feed conveyor belt 5; the two pneumatic pallets 8 are respectively located on the left and right sides of the upper part of the sub-box structure, which are located below the feed conveyor belt 5, are horizontally arranged in the left and right directions, can move toward or away from each other, and are controlled by the lower photoelectric sensor 7; when the two pneumatic pallets 8 are in a separated state, they are located outside the area surrounded by the limit fixture rod 3; when the two pneumatic pallets 8 are in a facing state, they move to the area surrounded by the limit fixture rod 3 to support the pallet 4; the upper photoelectric sensor 6 is located adjacent to the upper side of the pneumatic pallet 8 and it can detect whether there is a pallet 4 on the pneumatic pallet 8; if there is no pallet 4 on the pneumatic pallet 8, the feed conveyor belt 5 outputs a stack of pallets 4 backwards into the sub-box structure; the lower photoelectric sensor 7 is located in the middle between the spiral column 2 and the pneumatic pallet 8; if the height of the pallet 4 at the bottom of the sub-box structure is lower than the lower photoelectric sensor 7, the two pneumatic pallets 8 move away from each other to allow the stack of pallets 4 thereon to fall downward.

[0010] Among them, the limiting jig rod 3 in the embodiment of the utility model includes four straight jig rods 31 and four L-shaped jig rods 32, and the straight jig rods 31 and the L-shaped jig rods 32 are both vertically arranged and their lower ends are located adjacent to the upper part of the discharge conveyor belt 1, the four straight jig rods 31 are respectively located at the adjacent outer sides of the middle parts of the four sides of the pallet 4, the four L-shaped jig rods 32 are respectively located at the adjacent outer sides of the four corners of the pallet 4 and they cooperate with the four corners of the pallet 4, and the four straight jig rods 31 and the four L-shaped jig rods 32 form a rectangular area that cooperates with the pallet 4; the front straight jig rod 31 and the two L-shaped jig rods 32 are located adjacent to the lower part of the rear end of the feed conveyor belt 5, and the remaining three straight jig rods 31 and the two L-shaped jig rods 32 extend upward relative to the feed conveyor belt 5.

[0011] Among them, the pneumatic support plate 8 in the embodiment of the utility model includes a rectangular support plate 81 and a cylinder 82 on its outer side, the rectangular support plate 81 and the cylinder 82 are both arranged in the left and right directions, and the cylinder 82 is fixed on the frame; the rectangular support plate 81 is located at the straight fixture rod 31 on the left or right side, and a strip notch 83 capable of accommodating the straight fixture rod 31 is provided in the middle of the inner side in the left and right directions; the two cylinders 82 are driven synchronously; when the cylinder 82 contracts, the rectangular support plate 81 is located on the outer side of the straight fixture rod 31 on the corresponding side; when the cylinder 82 extends, the inner end of the rectangular support plate 81 moves to the inner side of the straight fixture rod 31 on the corresponding side, and at this time, the straight fixture rod 31 is located in the strip notch 83.

[0012] Specifically, the upper photoelectric sensor 6 in the embodiment of the utility model is arranged on the frame, which is located directly behind the sub-box structure and is arranged forward; the lower photoelectric sensor 7 is arranged on the inner side of the straight fixture rod 31 on the left or right side, and the inner side of the corresponding straight fixture rod 31 is provided with a notch for the lower photoelectric sensor 7 to be embedded.

[0013] Among them, the feed conveyor belt 5 in the embodiment of the utility model includes a movable base 51 and a conveyor belt 52 on top of it; a roller is provided at the bottom of the movable base 51, which is located in front of the discharge conveyor belt 1 and the frame; the conveyor belt 52 is arranged in the front-to-back direction, and is located directly above the discharge conveyor belt 1, and its rear end extends backward relative to the rear side of the movable base 51, and its rear end is located adjacent to the front of the upper part of the sub-box structure.

[0014] Furthermore, a short guardrail 53 and a high guardrail 54 are respectively provided on the left and right sides of the conveyor belt 52 in the embodiment of the utility model. The short guardrail 53 and the high guardrail 54 are both located above the adjacent conveyor belt 52 and are both arranged in the front-to-back direction. The upper end of the high guardrail 54 is higher than the upper end of the short guardrail 53 and is located on the side away from the operator.

[0015] Specifically, the frame in the embodiment of the utility model is a rectangular frame arranged in the front-to-back direction, and its front part is located below the conveyor belt 52; two pneumatic support plates 8 are respectively arranged on the upper frame edges on the left and right sides of the frame, and the upper photoelectric sensor 6 is arranged on the upper frame edge on the rear side of the frame.

[0016] Specifically, the height of the conveyor belt 52 in the embodiment of the utility model is 0.8-1.4m, the distance between the pneumatic support plate 8 and the spiral column 2 is 40-60cm, and the distance between the lower photoelectric sensor 7 and the spiral column 2 is 20-40cm.

[0017] Among them, the four spiral columns 2 in the embodiment of the utility model are arranged in a rectangular shape, the two spiral columns 2 on the left are respectively located at the front and rear ends of the left side of the tray 4, and the two spiral columns 2 on the right are respectively located at the front and rear ends of the right side of the tray 4; each spiral column 2 is driven by the servo motor above it; the four servo motors are driven synchronously, and they are located outside the area surrounded by the limit fixture rod 3, which is fixed on the frame.

[0018] The technical solution provided by the embodiment of the utility model has the following beneficial effects: the embodiment of the utility model provides a device for separating trays one by one, and the operator only needs to place the tray stacks side by side on the feeding conveyor belt, and the feeding conveyor belt can be set lower, which is convenient for placing and can accommodate more trays, and the operator does not need to stay beside the box separation device for a long time, and the degree of automation is high. In addition, the number of trays in the tray stack is small, which is convenient for picking up and moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a device for separating trays into boxes one by one in this embodiment;

[0020] Figure 2 It is a structural schematic diagram of the combination of the feed conveyor belt and the sub-box structure;

[0021] Figure 3 yes Figure 1 A schematic diagram of the structure when two pneumatic support plates are facing each other;

[0022] Figure 4 yes Figure 3 Schematic diagram of the structure when a pallet is placed on a pneumatic support plate.

[0023] In the figure: 1 discharging conveyor belt, 2 spiral column, 3 limit fixture rod, 4 tray, 5 feeding conveyor belt, 6 upper photoelectric sensor, 7 lower photoelectric sensor, 8 pneumatic support plate;

[0024] 31 straight fixture rod, 32 L-shaped fixture rod;

[0025] 51 mobile base, 52 conveyor belt, 53 low guardrail, 54 high guardrail;

[0026] 81 rectangular support plate, 82 cylinder, 83 strip notch. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] See also Figure 1-4Embodiment 1 provides a device for separating boxes one by one on a tray, which includes a frame, a box separation structure, a discharge conveyor belt 1, a feed conveyor belt 5, an upper photoelectric sensor 6, a lower photoelectric sensor 7 and two synchronously driven pneumatic support plates 8.

[0030] The frame is a rectangular frame arranged along the front-to-back direction, and the front part of the frame is located below the conveyor belt 52 .

[0031] Among them, the sub-box structure is arranged on the frame, which includes four vertically arranged spiral columns 2 and multiple limit fixture rods 3. The discharge conveyor belt 1 is arranged in the front-to-back direction, and its front part is located directly below the sub-box structure, which conveys backward. Four spiral columns 2 are located at the bottom of the limit fixture rod 3, and a spiral groove is provided on it to cooperate with the convex edge of the tray 4, which is consistent with the prior art. Multiple limit fixture rods 3 are arranged around the tray 4, which are located on the adjacent outer sides of the four sides of the tray 4, and they enclose a rectangular area that cooperates with the tray 4. Specifically, the four spiral columns 2 are arranged in a rectangular shape, and the two spiral columns 2 on the left side (located directly above the left part of the discharge conveyor belt 1) are respectively located at the front and rear ends of the left side of the tray 4, and the two spiral columns 2 on the right side (located directly above the right part of the discharge conveyor belt 1) are respectively located at the front and rear ends of the right side of the tray 4. Each spiral column 2 is driven by a servo motor above it; four servo motors are driven synchronously, which are located outside the area surrounded by the limit fixture rods 3 and are fixed on the frame.

[0032] The feeding conveyor belt 5 is arranged in the front-to-back direction, and its rear end is located adjacent to the upper part of the box structure. It is controlled by the upper photoelectric sensor 6. There are multiple stacks of trays 4 (including multiple trays 4 arranged side by side up and down, which can be 5-30 in detail) placed side by side (interval-placed) on it, and it is conveyed backward. Specifically, the height of the conveyor belt 52 is 0.8-1.4m for easy operation, and its length is preferably greater than 1m to accommodate more trays 4.

[0033] Among them, the limiting jig rod 3 on the front side of the sub-box structure is located adjacent to and below the feed conveyor belt 5, and the limiting jig rods 3 on the rear side, left side and right side of the sub-box structure extend upward relative to the feed conveyor belt 5. Specifically, the limiting jig rod 3 includes four straight jig rods 31 and four L-shaped jig rods 32, and the straight jig rods 31 and the L-shaped jig rods 32 are both vertically arranged and their lower ends are located adjacent to and above the discharge conveyor belt 1. The four straight jig rods 31 are respectively located at the adjacent outer sides of the middle of the four sides of the pallet 4, and they are all straight rods. The four L-shaped jig rods 32 are respectively located at the adjacent outer sides of the four corners of the pallet 4, and they cooperate with the four corners of the pallet 4, and they are all L-shaped. The four straight jig rods 31 and the four L-shaped jig rods 32 enclose a rectangular area that cooperates with the pallet 4. The front straight jig rod 31 and two L-shaped jig rods 32 are located adjacent to and below the rear end of the feed conveyor belt 5, and the remaining three straight jig rods 31 and two L-shaped jig rods 32 extend upward relative to the feed conveyor belt 5. The top ends of the straight jig rods 31 and the L-shaped jig rods 32 can be inclined surfaces slanting inward from top to bottom. Further, the position limiting jig rod 3 in this embodiment can be improved from the existing position limiting jig rod, and the upper parts of the front straight jig rod 31 and the two L-shaped jig rods 32 are shortened, and the remaining three straight jig rods 31 and the two L-shaped jig rods 32 are not modified.

[0034] Among them, the two pneumatic pallets 8 are respectively located on the left and right sides of the upper part of the box structure, which are located below the feed conveyor belt 5 (specifically, adjacent below), and are arranged horizontally in the left and right directions. They can move in the left and right directions, and can move toward or away from each other. They are controlled by the lower photoelectric sensor 7, which are respectively arranged on the upper frame edges on the left and right sides of the frame, and the distance between them and the spiral column 2 is 40-60cm. When the two pneumatic pallets 8 are in a separated state, they are located outside the area surrounded by the limit fixture rod 3; when the two pneumatic pallets 8 are in a facing state, they move to the area surrounded by the limit fixture rod 3 to support the tray 4. Specifically, the pneumatic pallet 8 includes a rectangular pallet 81 and a cylinder 82 on its outer side, etc. The rectangular pallet 81 and the cylinder 82 are both arranged in the left and right directions, and the cylinder 82 is fixed on the frame (specifically arranged on the upper frame edge on the corresponding side of the frame). The rectangular support plate 81 is located at the straight fixture rod 31 on the left or right side, and is located between the two L-shaped fixture rods 32 on the corresponding side. A strip notch 83 (the width of which is greater than the width of the straight fixture rod 31) is provided in the middle of the inner side along the left and right directions to accommodate the straight fixture rod 31. The two cylinders 82 are driven synchronously. When the cylinder 82 contracts, the rectangular support plate 81 is located on the outer side of the straight fixture rod 31 on the corresponding side. When the cylinder 82 extends, the inner end of the rectangular support plate 81 moves to the inner side of the straight fixture rod 31 on the corresponding side (the extension distance is preferably greater than 2 cm to ensure the support effect). At this time, the straight fixture rod 31 is located in the strip notch 83.

[0035] The upper photoelectric sensor 6 is located above and adjacent to the surface where the pneumatic pallet 8 is located and can detect whether there is a pallet 4 on the pneumatic pallet 8. Specifically, the upper photoelectric sensor 6 is arranged on the upper frame edge at the rear side of the frame, and is located directly behind the box separation structure and is arranged forward. If there is no pallet 4 on the pneumatic pallet 8, the upper photoelectric sensor 6 is triggered, and the feed conveyor belt 5 outputs a stack of pallets 4 backward to the box separation structure.

[0036] The lower photoelectric sensor 7 is located in the middle between the spiral column 2 and the pneumatic support plate 8, and is arranged on the inner side of the left or right straight fixture rod 31, and the distance between it and the spiral column 2 is 20-40cm. Correspondingly, a notch is provided on the inner side of the straight fixture rod 31 for the lower photoelectric sensor 7 to be embedded. If the height of the tray 4 at the bottom of the box structure (the top tray 4) is lower than the lower photoelectric sensor 7, the two pneumatic support plates 8 move away from each other (outside the rectangular area) to allow the stack of trays 4 thereon to fall downward.

[0037] Example 2

[0038] See also Figure 1 Embodiment 2 provides a device for separating trays one by one, and its structure is basically the same as that of embodiment 1, except that: the feed conveyor belt 5 in this embodiment includes a movable base 51 and a conveyor belt 52 on its top, etc.; that is, the feed conveyor belt 5 can be removed, and the direct manual feeding to the rectangular area can be restored or the feed conveyor belt 5 can be removed to the side of the separation box structure for feeding. The bottom of the movable base 51 is provided with a roller (specifically, it can be a universal roller), which is located in front of the discharge conveyor belt 1 and the frame. The conveyor belt 52 is arranged in the front-to-back direction, and is located directly above the discharge conveyor belt 1. Its rear end extends backward relative to the rear side of the movable base 51, and its rear end is located in front of the upper part of the separation box structure. It is conveyed backward, and its length is greater than 1m, and the tray 4 outputted by it just falls into the rectangular area.

[0039] Example 3

[0040] See also Figure 1-4 Embodiment 3 provides a device for separating boxes of trays one by one, and its structure is basically the same as that of Embodiment 2, except that: the left and right sides of the conveyor belt 52 in this embodiment are respectively provided with a short guardrail 53 and a high guardrail 54, and the short guardrail 53 and the high guardrail 54 are respectively located on the adjacent outer sides of the left and right sides of the tray 4. The short guardrail 53 and the high guardrail 54 are used to guide the tray 4 to be transported backward and fall into the rectangular area. The short guardrail 53 and the high guardrail 54 are both located above the conveyor belt 52 and are both arranged in the front-to-back direction. The upper end of the high guardrail 54 is higher than the upper end of the short guardrail 53 and is located on the side away from the operator. The operator is located on one side of the short guardrail 53 to facilitate the placement of the tray 4. The height of the short guardrail 53 is specifically 2 cm, and the height of the high guardrail 54 is specifically 5 cm.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for separating pallets one by one into boxes, comprising a frame, a separation box structure on the frame, and a discharging conveyor belt (1) arranged directly below the separation box structure and in a front-to-back direction, wherein the separation box structure comprises four vertically arranged spiral columns (2) and a plurality of position limiting fixture rods (3); the four spiral columns (2) are located at the bottom of the position limiting fixture rods (3), and are provided with spiral grooves that cooperate with the convex edges of the pallet (4); the plurality of position limiting fixture rods (3) are arranged around the pallet (4) and are located at adjacent outer sides of the four sides of the pallet (4); characterized in that: The device further comprises a feed conveyor belt (5), an upper photoelectric sensor (6), a lower photoelectric sensor (7) and two synchronously driven pneumatic support plates (8); the feed conveyor belt (5) is arranged in the front-to-back direction, and its rear end is located adjacent to the front of the upper part of the sub-box structure, and is controlled by the upper photoelectric sensor (6), and a plurality of stacks of trays (4) are placed side by side in the front and back directions on the feed conveyor belt (5); the limit fixture rod (3) on the front side of the sub-box structure is located adjacent to the lower part of the feed conveyor belt (5), and the limit fixture rods (3) on the rear side, left side and right side of the sub-box structure extend upward relative to the feed conveyor belt (5); the two pneumatic support plates (8) are respectively located on the left and right sides of the upper part of the sub-box structure, and are located below the feed conveyor belt (5). They are arranged horizontally in the left-right direction, can move towards or away from each other, and are controlled by the lower photoelectric sensor (7); When the two pneumatic pallets (8) are in a separated state, they are located outside the area surrounded by the limiting fixture rod (3); when the two pneumatic pallets (8) are in a facing state, they move to the area surrounded by the limiting fixture rod (3) to support the pallet (4); the upper photoelectric sensor (6) is located adjacent to the upper surface of the pneumatic pallet (8) and can detect whether there is a pallet (4) on the pneumatic pallet (8); if there is no pallet (4) on the pneumatic pallet (8), the feed conveyor belt (5) outputs a stack of pallets (4) backwards to the box structure; the lower photoelectric sensor (7) is located in the middle between the spiral column (2) and the pneumatic pallet (8); if the height of the pallet (4) at the bottom of the box structure is lower than the lower photoelectric sensor (7), the two pneumatic pallets (8) move away from each other to allow the stack of pallets (4) thereon to fall downward.

2. The device for separating trays into boxes one by one according to claim 1, characterized in that: The limiting jig rods (3) include four straight jig rods (31) and four L-shaped jig rods (32); the straight jig rods (31) and the L-shaped jig rods (32) are both arranged vertically and their lower ends are located adjacent to and above the discharge conveyor belt (1); the four straight jig rods (31) are respectively located adjacent to and outside the middle of the four sides of the pallet (4); the four L-shaped jig rods (32) are respectively located adjacent to and outside the four corners of the pallet (4) and cooperate with the four corners of the pallet (4); the four straight jig rods (31) and the four L-shaped jig rods (32) enclose a rectangular area that cooperates with the pallet (4); one straight jig rod (31) and two L-shaped jig rods (32) on the front side are located adjacent to and below the rear end of the feed conveyor belt (5); the remaining three straight jig rods (31) and two L-shaped jig rods (32) extend upward relative to the feed conveyor belt (5).

3. The device for separating trays into boxes one by one according to claim 2, characterized in that: The pneumatic support plate (8) comprises a rectangular support plate (81) and an air cylinder (82) on its outer side, wherein the rectangular support plate (81) and the air cylinder (82) are both arranged in the left-right direction, and the air cylinder (82) is fixed on a frame; the rectangular support plate (81) is located at the straight fixture rod (31) on the left or right side, and a strip-shaped notch (83) capable of accommodating the straight fixture rod (31) is arranged in the middle of the inner side thereof in the left-right direction; the two air cylinders (82) are driven synchronously; when the air cylinder (82) contracts, the rectangular support plate (81) is located on the outer side of the straight fixture rod (31) on the corresponding side; when the air cylinder (82) extends, the inner end of the rectangular support plate (81) moves to the inner side of the straight fixture rod (31) on the corresponding side, and at this time, the straight fixture rod (31) is located in the strip-shaped notch (83).

4. The device for separating trays into boxes one by one according to claim 2, characterized in that: The upper photoelectric sensor (6) is arranged on the frame, and is located directly behind the sub-box structure and is arranged forward; the lower photoelectric sensor (7) is arranged on the inner side of the left or right straight jig rod (31), and the inner side of the corresponding straight jig rod (31) is provided with a notch for the lower photoelectric sensor (7) to be embedded.

5. The device for separating trays into boxes one by one according to claim 4, characterized in that: The feed conveyor belt (5) comprises a movable base (51) and a conveyor belt (52) on top thereof; a roller is provided at the bottom of the movable base (51), which is located in front of the discharge conveyor belt (1) and the frame; the conveyor belt (52) is arranged in the front-to-back direction, and is located directly above the discharge conveyor belt (1), and its rear end extends backward relative to the rear side of the movable base (51), and its rear end is located adjacent to the front of the upper part of the sub-box structure.

6. The device for separating trays into boxes one by one according to claim 5, characterized in that: A short guardrail (53) and a high guardrail (54) are respectively provided on the left and right sides of the conveyor belt (52); the short guardrail (53) and the high guardrail (54) are both located above the conveyor belt (52) and are arranged in the front-to-back direction; the upper end of the high guardrail (54) is higher than the upper end of the short guardrail (53) and is located on the side away from the operator.

7. The device for separating trays into boxes one by one according to claim 5, characterized in that: The frame is a rectangular frame arranged in the front-to-back direction, and its front part is located below the conveyor belt (52); two pneumatic support plates (8) are respectively arranged on the upper frame edges on the left and right sides of the frame, and the upper photoelectric sensor (6) is arranged on the upper frame edge on the rear side of the frame.

8. The device for separating trays into boxes one by one according to claim 5, characterized in that: The height of the conveyor belt (52) is 0.8-1.4m, the distance between the pneumatic support plate (8) and the spiral column (2) is 40-60cm, and the distance between the lower photoelectric sensor (7) and the spiral column (2) is 20-40cm.

9. The device for separating trays into boxes one by one according to claim 1, characterized in that: The four spiral columns (2) are arranged in a rectangular shape, the two spiral columns (2) on the left are respectively located at the front and rear ends of the left side of the tray (4), and the two spiral columns (2) on the right are respectively located at the front and rear ends of the right side of the tray (4); each spiral column (2) is driven by a servo motor above it; the four servo motors are driven synchronously, and are located outside the area surrounded by the limit fixture rod (3), which is fixed on the frame.

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