Feeding and discharging device of full-automatic circulating conveying line of three-dimensional tray rack

Abstract

The utility model discloses a feeding and discharging device of a full-automatic circulating conveying line of a three-dimensional tray rack, which is characterized in that the conveying starting end of a feeding and discharging conveying rack is connected with the conveying tail end of a lifting conveying rack B, and the conveying starting end of the lifting conveying rack B is connected with the conveying tail end of the three-dimensional tray rack conveying line; the conveying tail end of the feeding and discharging conveying frame is connected with the conveying starting end of the lifting conveying frame A. The conveying tail end of the lifting conveying frame A is connected with the conveying starting end of the three-dimensional tray frame conveying line. According to the structure, the feeding and discharging device of the full-automatic circulating conveying line of the three-dimensional tray rack has the advantages that empty trays can be conveniently taken out of the three-dimensional tray rack on the circulating conveying line, trays filled with materials can be conveniently loaded into the three-dimensional tray rack on the circulating conveying line, and the feeding and discharging conveying rack is relatively lower than the circulating conveying line; furthermore, an operator can conveniently take out and load the trays from and into the three-dimensional tray rack.

Description

Technical Field

[0001] The utility model relates to the technical field of pallet rack conveying equipment, in particular to a loading and unloading device of a full-automatic circulating conveying line of a three-dimensional pallet rack. Background Art

[0002] With the development of food processing, more and more food processing has been automated, which can effectively improve the production efficiency of food processing. In order to match the automated production process, food processing equipment needs to be improved.

[0003] In order to realize automated production, food processing enterprises will be equipped with fully automatic conveyor lines for conveying materials. When conveying materials, such fully automatic conveyor lines will pre-place multiple materials evenly on the trays, and then place the trays from top to bottom in the order shown in the attached manual. Figure 2 The three-dimensional pallet rack shown includes support vertical bars provided at the four corners, and the bottom and top of the area enclosed by the support vertical bars are respectively provided with a bottom frame and a top frame. Within the area enclosed by the support vertical bars, multiple layers of pallet placement rods are provided at equal intervals between the bottom frame and the top frame. Each layer of pallet placement rods is provided with two pallet placement rods arranged longitudinally and parallel to each other and symmetrically fixed to the opposite sides of the support vertical bars on both sides. Limiting cross bars are provided laterally on the rear side of the area enclosed by the support vertical bars, above the bottom frame, and above each layer of pallet placement rods. The top surface of the bottom frame is in contact with the bottom of the corresponding limiting cross bar, and the top surface of each layer of pallet placement rods is in contact with the bottom of the corresponding limiting cross bar. This three-dimensional pallet rack can effectively increase the pallet placement capacity and also facilitate the removal and placement of pallets. The three-dimensional pallet rack is then transported along the fully automatic conveyor line through each production equipment in sequence. Through the transmission of the fully automatic conveyor line, the production equipment can be connected in series, thereby realizing automated production of the food processing enterprise and ultimately achieving effective improvement in production efficiency.

[0004] However, in order to match the inlets and outlets of various production equipment, the conveyor lines currently configured by production enterprises for three-dimensional pallet racks or other material turnover devices are required to be coordinated with the conveying rhythm of the conveyor line because the conveying of the conveyor lines is an overall linkage transmission. In addition, in order to avoid contamination of materials, the conveyor lines are set at a certain height. When taking and placing pallets on the three-dimensional pallet racks on such a conveyor line with a certain height, the operation is very inconvenient and the workload of the loading and unloading operators is increased. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a loading and unloading device for a fully automatic circulating conveyor line of a three-dimensional pallet rack, which is convenient for placing the three-dimensional pallet rack on the circulating conveyor line to complete the removal of empty pallets and the loading of pallets filled with materials. Moreover, the loading and unloading conveyor rack is relatively lower than the circulating conveyor line, which further facilitates the operator to remove and load pallets from the three-dimensional pallet rack.

[0006] The technical solution adopted by this utility model is:

[0007] The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack includes a loading and unloading conveyor rack, the conveying starting end of the loading and unloading conveyor rack is connected to the conveying end of the lifting conveyor rack B, the conveying starting end of the lifting conveyor rack B is connected to the conveying end of the three-dimensional pallet rack conveyor line, the conveying end of the loading and unloading conveyor rack is connected to the conveying starting end of the lifting conveyor rack A, and the conveying end of the lifting conveyor rack A is connected to the conveying starting end of the three-dimensional pallet rack conveyor line. When the lifting conveyor rack A and the lifting conveyor rack B move downward to the maximum stroke, the height of the lifting conveyor rack A and the height of the lifting conveyor rack B are respectively The lifting and lowering frames are matched with the height of the loading and lowering conveyor frames. When the lifting conveyor frame A and the lifting conveyor frame B move upward to the maximum stroke, the height of the lifting conveyor frame A and the height of the lifting conveyor frame B respectively match the height of the three-dimensional pallet frame conveyor line. The loading and lowering conveyor frames are provided with a lifting turntable. When the lifting turntable moves upward to the maximum stroke, the lifting turntable lifts the lowest point of the three-dimensional pallet frame located on the lifting turntable to be higher than the loading and lowering conveyor frames. When the lifting turntable moves downward to the maximum stroke, the top surface height of the lifting turntable is lower than the bottom of the three-dimensional pallet frame located on the loading and lowering conveyor frames.

[0008] A further improvement of the present invention is that the lifting and conveying rack A is lifted up and down by a lifting device A, and the lifting and conveying rack B is lifted up and down by a lifting device B.

[0009] A further improvement of the present invention is that conveyor belts A are respectively provided on both side edges of the loading and unloading conveyor racks, conveyor belts B are respectively provided on both side edges of the lifting conveyor rack A, and conveyor belts C are respectively provided on both side edges of the lifting conveyor rack B. The conveyor belts A, B and C correspond to the two sides of the bottom of the three-dimensional pallet rack respectively.

[0010] A further improvement of the present invention is that the conveyor belt A is driven by the drive motor A provided on the loading and unloading conveyor frame, the conveyor belt B is driven by the drive motor B provided on the lifting conveyor frame A, and the conveyor belt C is driven by the drive motor C provided on the lifting conveyor frame B.

[0011] A further improvement of the present invention is that the loading and unloading conveyor frame is located on the outside of the conveyor belt A, and a plurality of lateral limiting rollers A are provided in sequence along the conveying direction corresponding to the conveying starting position and the conveying end position respectively; the lifting conveyor frame A is located on the outside of the conveyor belt B and a plurality of lateral limiting rollers B are provided in sequence along the conveying direction; the lifting conveyor frame B is located on the outside of the conveyor belt C and a plurality of lateral limiting rollers C are provided in sequence along the conveying direction; the spacing between the lateral limiting rollers A on both sides of the loading and unloading conveyor frame, the spacing between the lateral limiting rollers B on both sides of the lifting conveyor frame A, and the spacing between the lateral limiting rollers C on both sides of the lifting conveyor frame B all match the width size of the three-dimensional pallet frame.

[0012] A further improvement of the present invention is that the side walls of the bracket of the lifting conveyor frame A used to connect to the conveyor belt B and the side walls of the bracket of the lifting conveyor frame B used to connect to the conveyor belt C are both provided with reinforcing ribs.

[0013] A further improvement of the present invention is that the loading and unloading conveyor frame is fixed with a lifting hydraulic cylinder, the hydraulic rod of the lifting hydraulic cylinder is fixed with a driving motor D, and the driving motor D drives the lifting turntable to rotate horizontally around the vertical axis.

[0014] A further improvement of the present invention is that a control box B and a control box A are respectively provided on one side of the upper and lower material conveyor racks, at the starting and end points of the conveyance, and the control box A is provided with a conveying switch A for controlling the conveying of the upper and lower material conveyor racks, a lifting switch A and a conveying switch C for respectively controlling the lifting and conveying of the lifting conveyor rack A, and a lifting switch C and a rotation switch A for respectively controlling the lifting and rotation of the lifting turntable; the control box B is provided with a conveying switch B for controlling the conveying of the upper and lower material conveyor racks, a lifting switch B and a conveying switch D for respectively controlling the lifting and conveying of the lifting conveyor rack B, and a lifting switch D and a rotation switch B for respectively controlling the lifting and rotation of the lifting turntable.

[0015] A further improvement of the present invention is that two lifting turntables are symmetrically provided on the loading and unloading conveying frame along the conveying direction, and are respectively located at the conveying starting end and the conveying end end of the loading and unloading conveying frame.

[0016] A further improvement of the present invention is that the lifting turntable controlled by the control box A is a lifting turntable located at the end of the loading and unloading conveyor frame, and the lifting turntable controlled by the control box B is a lifting turntable located at the beginning of the loading and unloading conveyor frame.

[0017] The beneficial effects of the present invention are:

[0018] First, the loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack of the present invention makes it easy to place the three-dimensional pallet rack on the circulating conveyor line to complete the removal of empty pallets and the loading of pallets filled with materials. Moreover, the loading and unloading conveyor rack is relatively lower than the circulating conveyor line, which further facilitates the operator to remove and load pallets from the three-dimensional pallet rack.

[0019] Secondly, the loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack of the present invention, through the action of the lifting turntable, can facilitate the three-dimensional pallet rack to take out and load pallets on the loading and unloading conveyor rack, and the pallet taking and placing port of the three-dimensional pallet rack faces the side where the operator is located, and before being conveyed to the circulating conveyor line, the pallet taking and placing port of the three-dimensional pallet rack is directed to the front side of the conveyor line, so that the equipment passed by the conveyor line can take and place the materials in the pallet.

[0020] Third, the loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack of the present invention, the reinforcing ribs provided on the lifting conveyor rack A and the lifting conveyor rack B can provide sufficient support effects for the conveyor belt B and the conveyor belt C respectively, thereby ensuring that the three-dimensional pallet rack has sufficient supporting force when lifting.

[0021] Fourth, the loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack of the utility model ensures the conveying stability of the three-dimensional pallet rack through the action of the limiting lateral limiting rollers. The lateral limiting rollers arranged at the conveying starting and conveying ends of the loading and unloading conveyor rack ensure the stability of the three-dimensional pallet rack when being conveyed from the circulating conveyor line to the lifting conveyor rack B, from the lifting conveyor rack B to the loading and unloading conveyor rack, from the loading and unloading conveyor rack to the lifting conveyor rack A, and from the lifting conveyor rack A to the circulating conveyor line, and ensures the stability of the three-dimensional pallet rack when the lifting conveyor rack A is raised and lowered and when the lifting conveyor rack B is raised and lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the present application.

[0023] Figure 2 It is a schematic diagram of the main view of the three-dimensional pallet rack. DETAILED DESCRIPTION

[0024] like Figure 1It can be seen that the loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack includes a loading and unloading conveyor rack 1, the conveying starting end of the loading and unloading conveyor rack 1 is connected to the conveying end of the lifting conveyor rack B3, the conveying starting end of the lifting conveyor rack B3 is connected to the conveying end of the three-dimensional pallet rack conveying line, the conveying end of the loading and unloading conveyor rack 1 is connected to the conveying starting end of the lifting conveyor rack A2, and the conveying end of the lifting conveyor rack A2 is connected to the conveying starting end of the three-dimensional pallet rack conveying line, thereby forming a circulating line of the three-dimensional pallet rack. When the lifting conveyor rack A2 and the lifting conveyor rack B3 move downward to the maximum stroke, the height of the lifting conveyor rack A2 and the lifting conveyor rack B3 are connected. The height of the feeding rack B3 matches the height of the loading and unloading conveying rack 1. When the lifting conveying rack A2 and the lifting conveying rack B3 move upward to the maximum stroke, the height of the lifting conveying rack A2 and the height of the lifting conveying rack B3 match the height of the three-dimensional pallet rack conveying line. The loading and unloading conveying rack 1 is provided with a lifting turntable 9. When the lifting turntable 9 moves upward to the maximum stroke, the lifting turntable 9 lifts the lowest point of the three-dimensional pallet rack 21 located on the lifting turntable 9 to be higher than the loading and unloading conveying rack 1. When the lifting turntable 9 moves downward to the maximum stroke, the top surface height of the lifting turntable 9 is lower than the bottom of the three-dimensional pallet rack 21 located on the loading and unloading conveying rack 1.

[0025] The lifting and conveying rack A2 is lifted up and down by a lifting device A4, and the lifting and conveying rack B3 is lifted up and down by a lifting device B5.

[0026] Conveyor belts A6 are respectively provided on both side edges of the loading and unloading conveyor rack 1, conveyor belts B7 are respectively provided on both side edges of the lifting conveyor rack A2, and conveyor belts C8 are respectively provided on both side edges of the lifting conveyor rack B3. The conveyor belts A6, B7 and C8 are respectively matched with the two sides of the bottom of the three-dimensional pallet rack 21.

[0027] The conveyor belt A6 is driven by the driving motor A10 provided on the loading and unloading conveyor frame 1, the conveyor belt B7 is driven by the driving motor B11 provided on the lifting conveyor frame A2, and the conveyor belt C8 is driven by the driving motor C12 provided on the lifting conveyor frame B3.

[0028] The loading and unloading conveying frame 1 is located on the outside of the conveyor belt A6, and is provided with a plurality of lateral limiting rollers A15 in sequence along the conveying direction corresponding to the conveying starting position and the conveying end position respectively. The lifting conveying frame A2 is located on the outside of the conveyor belt B7 and is provided with a plurality of lateral limiting rollers B16 in sequence along the conveying direction. The lifting conveying frame B3 is located on the outside of the conveyor belt C8 and is provided with a plurality of lateral limiting rollers C17 in sequence along the conveying direction. The spacing between the lateral limiting rollers A15 on both sides of the loading and unloading conveying frame 1, the spacing between the lateral limiting rollers B16 on both sides of the lifting conveying frame A2, and the spacing between the lateral limiting rollers C17 on both sides of the lifting conveying frame B3 all match the width dimension of the three-dimensional pallet frame 21.

[0029] The side walls of the bracket of the lifting conveyor frame A2 used to connect to the conveyor belt B7 and the side walls of the bracket of the lifting conveyor frame B3 used to connect to the conveyor belt C8 are both provided with reinforcing ribs 20.

[0030] The loading and unloading conveyor frame 1 is fixed with a lifting hydraulic cylinder 14, and the hydraulic rod of the lifting hydraulic cylinder 14 is fixed with a driving motor D13. The driving motor D13 drives the lifting turntable 9 to rotate horizontally around the vertical axis.

[0031] On one side of the loading and unloading conveyor rack 1, a control box B19 and a control box A18 are respectively provided at the conveying starting end and the conveying end end. The control box A18 is provided with a conveying switch A for controlling the conveying of the loading and unloading conveyor rack 1, a lifting switch A and a conveying switch C for respectively controlling the lifting and conveying of the lifting conveyor rack A2, and a lifting switch C and a rotation switch A for respectively controlling the lifting and rotation of the lifting turntable 9. The control box B19 is provided with a conveying switch B for controlling the conveying of the loading and unloading conveyor rack 1, a lifting switch B and a conveying switch D for respectively controlling the lifting and conveying of the lifting conveyor rack B3, and a lifting switch D and a rotation switch B for respectively controlling the lifting and rotation of the lifting turntable 9.

[0032] Two lifting turntables 9 are symmetrically provided on the loading and unloading conveying frame 1 along the conveying direction, and are respectively located at the conveying starting end and the conveying end end of the loading and unloading conveying frame 1 .

[0033] The lifting turntable 9 controlled by the control box A18 is the lifting turntable 9 located at the end of the loading and unloading conveyor frame 1, and the lifting turntable 9 controlled by the control box B19 is the lifting turntable 9 located at the beginning of the loading and unloading conveyor frame 1.

[0034] When the lifting turntable 9 moves upward to the maximum stroke, the three-dimensional pallet rack 21 located on the lifting turntable 9 is lower than the three-dimensional pallet rack 21 located on the full-automatic circulation conveying line of the three-dimensional pallet rack.

[0035] The structure of the three-dimensional pallet rack 21 used in the fully automatic circulation conveyor line of the three-dimensional pallet rack includes supporting uprights 22 respectively arranged at the four corners, and the bottom and top of the area enclosed by the supporting uprights 22 are respectively provided with a base frame 23 and a top frame 24, and the area enclosed by the supporting uprights 22 is evenly spaced between the base frame 23 and the top frame 24. Each layer of pallet placing rods 25 is respectively provided with two pallet placing rods 25 longitudinally and parallel, and are symmetrically fixedly connected to the opposite sides of the supporting uprights 22 on both sides. A limiting cross bar 26 is horizontally provided on the rear side of the area enclosed by the supporting uprights 22, above the base frame 23 and above each layer of pallet placing rods 25. The top surface of the base frame 23 is in contact with the bottom of the corresponding limiting cross bar 26, and the top surface of each layer of pallet placing rod 25 is in contact with the bottom of the corresponding limiting cross bar 26.

[0036] The process of using the loading and unloading device of the fully automatic circulation conveyor line of the three-dimensional pallet rack is as follows:

[0037] The lifting and conveying rack A2 is normally located at a position where it has descended to its maximum stroke, the lifting and conveying rack B3 is normally located at a position where it has ascended to its maximum stroke, and the lifting turntable 9 is normally located at a position where it has descended to its maximum stroke. When the three-dimensional pallet rack 21 on the fully automatic circulation conveying line of the three-dimensional pallet rack is conveyed to the lifting and conveying rack B3, the driving motor C12 cooperates with the fully automatic circulation conveying line of the three-dimensional pallet rack to convey the three-dimensional pallet rack 21 to the lifting and conveying rack B3 through the conveyor belt C8. When the three-dimensional pallet rack 21 has just been completely conveyed to the lifting and conveying rack B3, the driving motor C12 stops driving, and the lifting device B5 drives the lifting and conveying rack B3 and the three-dimensional pallet rack 21 to move downward to the maximum stroke, and then the driving motor C12 drives the conveyor belt C8 again, and the driving motor A10 drives the conveyor belt A6 to convey, and the three-dimensional pallet rack 21 is conveyed to the upper and lower material conveying rack 1. When the three-dimensional pallet rack 21 is conveyed to the loading and unloading conveyor When the lifting turntable 9 at the conveying starting point of the feeding rack 1 is reached, the driving motor A10 stops the conveying of the conveyor belt A6, and the lifting hydraulic cylinder 14 of the lifting turntable 9 moves the lifting turntable 9 upward to the maximum stroke, and then the driving motor D13 of the lifting turntable 9 drives the lifting turntable 9 to rotate until the limit crossbar 26 of the three-dimensional pallet rack 21 is located on the opposite side of the control box B19 of the loading and unloading conveyor rack 1, so that the operator can easily take out the empty pallets in the three-dimensional pallet rack 21; after the empty pallets in the three-dimensional pallet rack 21 are completely taken out, the lifting hydraulic cylinder 14 of the lifting turntable 9 moves the lifting turntable 9 downward to the maximum stroke, and then the driving motor A10 drives the conveyor belt A6 to continue conveying;When the conveyor belt A6 transports the three-dimensional pallet rack 21 that takes out the empty pallet to the lifting turntable 9 located at the conveying end of the loading and unloading conveyor rack 1, the driving motor A10 stops the conveying of the conveyor belt A6, and the lifting hydraulic cylinder 14 of the lifting turntable 9 moves the lifting turntable 9 upward to the maximum stroke. After the operator puts the pallets filled with materials into the three-dimensional pallet rack 21 respectively, the driving motor D13 of the lifting turntable 9 drives the lifting turntable 9 to rotate to the side where the limiting cross bar 26 of the three-dimensional pallet rack 21 is located facing the conveying starting end of the loading and unloading conveyor rack 1, and then the lifting hydraulic cylinder 14 of the lifting turntable 9 moves the lifting turntable 9 downward to the maximum stroke, and then the driving motor A10 drives the conveyor belt A6 to continue conveying, and the driving motor B11 drives the conveyor belt B7 to convey. When the three-dimensional pallet rack on the loading and unloading conveyor rack 1 When the 3D pallet rack 21 is transferred to the lifting conveyor rack A2, the driving motor B11 cooperates with the loading and unloading conveyor rack 1 to transfer the 3D pallet rack 21 to the lifting conveyor rack A2 via the conveyor belt B7. When the 3D pallet rack 21 has just been completely transferred to the lifting conveyor rack A2, the driving motor A10 stops driving. When the 3D pallet rack 21 is transferred to the conveying end along the lifting conveyor rack A2, the driving motor B11 stops driving, and the lifting device A4 drives the lifting conveyor rack A2 and the 3D pallet rack 21 to move upward to the maximum stroke. Then the driving motor B11 drives the conveyor belt B7 again to transfer the 3D pallet rack 21 to the fully automatic circular conveying line of the 3D pallet rack. Finally, the lifting device A4 drives the lifting conveyor rack A2 to move downward to the maximum stroke, waiting for the loading and unloading conveyor rack 1 to transfer the 3D pallet rack 21 to the lifting conveyor rack A2 again. This reciprocating process realizes the circular conveying of the 3D pallet rack 21.

Claims

1. The loading and unloading device of the fully automatic circulation conveyor line of the three-dimensional pallet rack is characterized by: The invention comprises a loading and unloading conveying frame (1), wherein the conveying starting end of the loading and unloading conveying frame (1) is connected to the conveying end of the lifting conveying frame B (3), the conveying starting end of the lifting conveying frame B (3) is connected to the conveying end of the three-dimensional pallet frame conveying line, the conveying end of the loading and unloading conveying frame (1) is connected to the conveying starting end of the lifting conveying frame A (2), the conveying end of the lifting conveying frame A (2) is connected to the conveying starting end of the three-dimensional pallet frame conveying line, when the lifting conveying frame A (2) and the lifting conveying frame B (3) move downward to the maximum stroke, the height of the lifting conveying frame A (2) and the height of the lifting conveying frame B (3) respectively match the height of the loading and unloading conveying frame (1), and ...). When the lowering conveyor frame A (2) and the lifting conveyor frame B (3) move upward to the maximum stroke, the height of the lifting conveyor frame A (2) and the height of the lifting conveyor frame B (3) respectively match the height of the three-dimensional pallet frame conveying line, and the loading and unloading conveyor frame (1) is provided with a lifting turntable (9). When the lifting turntable (9) moves upward to the maximum stroke, the lifting turntable (9) lifts the lowest point of the three-dimensional pallet frame (21) located on the lifting turntable (9) to be higher than the loading and unloading conveyor frame (1). When the lifting turntable (9) moves downward to the maximum stroke, the top surface height of the lifting turntable (9) is lower than the bottom of the three-dimensional pallet frame (21) located on the loading and unloading conveyor frame (1).

2. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 1 is characterized in that: The lifting and conveying rack A (2) is lifted up and down by a lifting device A (4), and the lifting and conveying rack B (3) is lifted up and down by a lifting device B (5).

3. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 1 is characterized in that: Conveyor belts A (6) are provided on both side edges of the loading and unloading conveyor frame (1), conveyor belts B (7) are provided on both side edges of the lifting conveyor frame A (2), and conveyor belts C (8) are provided on both side edges of the lifting conveyor frame B (3). The conveyor belts A (6), B (7) and C (8) are respectively matched with the two sides of the bottom of the three-dimensional pallet frame (21).

4. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 3 is characterized in that: The conveyor belt A (6) is driven by a driving motor A (10) provided on the loading and unloading conveyor frame (1), the conveyor belt B (7) is driven by a driving motor B (11) provided on the lifting conveyor frame A (2), and the conveyor belt C (8) is driven by a driving motor C (12) provided on the lifting conveyor frame B (3).

5. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 3 is characterized in that: The loading and unloading conveyor frame (1) is located on the outside of the conveyor belt A (6), and is provided with a plurality of lateral limiting rollers A (15) in sequence along the conveying direction corresponding to the conveying starting position and the conveying end position respectively. The lifting conveyor frame A (2) is located on the outside of the conveyor belt B (7) and is provided with a plurality of lateral limiting rollers B (16) in sequence along the conveying direction. The lifting conveyor frame B (3) is located on the outside of the conveyor belt C (8) and is provided with a plurality of lateral limiting rollers C (17) in sequence along the conveying direction. The spacing between the lateral limiting rollers A (15) on both sides of the loading and unloading conveyor frame (1), the spacing between the lateral limiting rollers B (16) on both sides of the lifting conveyor frame A (2), and the spacing between the lateral limiting rollers C (17) on both sides of the lifting conveyor frame B (3) all match the width size of the three-dimensional pallet frame (21).

6. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 3, characterized in that: The side walls of the bracket of the lifting conveyor frame A (2) for connecting to the conveyor belt B (7) and the side walls of the bracket of the lifting conveyor frame B (3) for connecting to the conveyor belt C (8) are both provided with reinforcing ribs (20).

7. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 1 is characterized in that: The loading and unloading conveyor frame (1) is fixed with a lifting hydraulic cylinder (14), and the hydraulic rod of the lifting hydraulic cylinder (14) is fixed with a driving motor D (13), and the driving motor D (13) drives the lifting turntable (9) to rotate horizontally around the vertical axis.

8. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 1 is characterized in that: A control box B (19) and a control box A (18) are respectively provided on one side of the loading and unloading conveyor frame (1) at the conveying starting end and the conveying end end. The control box A (18) is provided with a conveying switch A for controlling the conveying of the loading and unloading conveyor frame (1), a lifting switch A and a conveying switch C for respectively controlling the lifting and conveying of the lifting conveyor frame A (2), and a lifting switch C and a rotating switch A for respectively controlling the lifting and rotating of the lifting turntable (9). The control box B (19) is provided with a conveying switch B for controlling the conveying of the loading and unloading conveyor frame (1), a lifting switch B and a conveying switch D for respectively controlling the lifting and conveying of the lifting conveyor frame B (3), and a lifting switch D and a rotating switch B for respectively controlling the lifting and rotating of the lifting turntable (9).

9. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 8, characterized in that: Two lifting turntables (9) are symmetrically provided on the loading and unloading conveying frame (1) along the conveying direction, and are respectively located at the conveying starting end and the conveying end end of the loading and unloading conveying frame (1).

10. The loading and unloading device of the fully automatic circulating conveyor line of the three-dimensional pallet rack according to claim 9, characterized in that: The lifting turntable (9) controlled by the control box A (18) is the lifting turntable (9) located at the end of the loading and unloading conveyor frame (1), and the lifting turntable (9) controlled by the control box B (19) is the lifting turntable (9) located at the beginning of the loading and unloading conveyor frame (1).

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