Double-layer tray automatic feeding and discharging machine

Abstract

The utility model discloses a double-layer tray automatic feeding and discharging machine which comprises a machine frame, and a lead screw lifting double-layer conveying assembly, a top layer conveying assembly and a bottom layer conveying assembly are arranged in the machine frame. The lead screw lifting double-layer conveying assembly comprises two sets of lifting conveying mechanisms conveying trays in the X-axis direction and the Y-axis direction and a first lifting mechanism controlling the two sets of lifting conveying mechanisms to ascend and descend, and the top-layer conveying assembly and the bottom-layer conveying assembly are arranged on the same side of the lead screw lifting double-layer conveying assembly in parallel. Each X-axis conveying mechanism comprises a plurality of sets of X-axis conveying mechanisms which are sequentially arranged in the X-axis direction, each X-axis conveying mechanism comprises two sets of first X-axis conveying belts which are synchronously driven through a first transmission shaft, and a Z-axis jacking assembly and a disc stacking assembly are arranged between the two sets of first X-axis conveying belts. Through cooperative work of the lead screw lifting double-layer conveying assembly, the top-layer conveying assembly and the bottom-layer conveying assembly, double-layer conveying design is achieved, and space is simplified; and the distribution of full-load trays and empty trays is realized, and path conflicts are avoided.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, specifically a double-layer pallet automatic loading and unloading machine. Background Technology

[0002] Existing loading and unloading machines generally use single-layer conveying, which has low efficiency and cannot achieve alternating operation of empty / full pallets; in addition, the number of feeding pallets is limited, resulting in low efficiency and failing to meet the loading speed requirements of the production line. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a double-layer pallet automatic loading and unloading machine. Through the coordinated operation of the screw-lifting double-layer conveying component, the top-layer conveying component, and the bottom-layer conveying component, a double-layer conveying design is achieved, making efficient use of vertical space. It also enables the separation of full-load and empty pallets, avoiding path conflicts and shortening cycle time. The cooperation between the Z-axis lifting component and the stacking component ensures the stability of pallet layering and stacking, reduces manual intervention, and provides automated loading and unloading operations for material handling at automatic production line stations.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A double-layer pallet automatic loading and unloading machine includes a frame. The frame houses a screw-lifting double-layer conveyor assembly, a top-layer conveyor assembly, and a bottom-layer conveyor assembly. The screw-lifting double-layer conveyor assembly includes two sets of lifting conveyor mechanisms spaced vertically apart, and a first lifting mechanism controlling the lifting of the two sets of lifting conveyor mechanisms. The lifting conveyor mechanisms are used to convey pallets along the X-axis and Y-axis directions. The top-layer conveyor assembly and the bottom-layer conveyor assembly are arranged parallel to each other on the same side of the screw-lifting double-layer conveyor assembly. Both the top-layer and bottom-layer conveyor assemblies include multiple sets of X-axis conveyor mechanisms arranged sequentially along the X-axis direction. Each set of X-axis conveyor mechanisms includes two sets of first X-axis conveyor belts synchronously driven by a first drive shaft. A Z-axis lifting assembly and a pallet stacking assembly are arranged between the two sets of first X-axis conveyor belts of the X-axis conveyor mechanism closest to the screw-lifting double-layer conveyor assembly.

[0006] The lifting and conveying mechanism includes a support base that is raised and lowered under the action of a first lifting mechanism, and two sets of Y-axis conveyor belts that are synchronously driven by a second drive shaft and mounted on the support base; a lifting platform that can be raised and lowered is provided on the support base between the two sets of Y-axis conveyor belts, and two sets of second X-axis conveyor belts that are synchronously driven by a third drive shaft are provided on the lifting platform.

[0007] The lifting platform is slidably connected with the support base, a rotating wheel is arranged on the lifting platform, a rotating wheel base is arranged on the support base, a rotating wheel cylinder is arranged to control the translation of the rotating wheel base, the rotating wheel base is slidably connected with the support base, and the rotating wheel base has an inclined surface in contact with the rotating wheel.

[0008] The first lifting mechanism comprises a first screw rod arranged on the rack, a first screw rod motor in transmission connection with the first screw rod, two groups of first sliding rails fixedly arranged on the rack, and a lifting base, the two groups of first sliding rails are respectively located on the two sides of the first screw rod, the lifting base is slidably connected with the first sliding rails, a first nut matched with the first screw rod is further arranged on the lifting base, and the lifting conveying mechanism is arranged on the lifting base.

[0009] The Z-axis jacking assembly comprises a jacking plate, a second lifting mechanism arranged on the jacking plate and used for controlling the lifting of the jacking plate, a plurality of pressing plates arranged on the outer periphery of the jacking plate, and a pressing plate cylinder arranged on the jacking plate and used for controlling the lifting of the pressing plates, and the pressing plates are arranged on the upper side of the jacking plate.

[0010] The second lifting mechanism comprises a fixing plate arranged on the lower side of the jacking plate, a lifting plate arranged on the lower side of the fixing plate, a plurality of light shafts movably arranged on the fixing plate, a second screw rod rotatably arranged on the fixing plate, and a second screw rod motor in transmission connection with the second screw rod, the lifting plate is provided with a second nut matched with the second screw rod, the upper end and the lower end of the light shaft are connected with the jacking plate and the lifting plate respectively, and the fixing plate is provided with a shaft sleeve matched with the light shaft.

[0011] The stacking disc assembly comprises two groups of stacking disc support plates slidably arranged on the support base and a stacking disc cylinder arranged on the support base and used for controlling the movement of the stacking disc support plates, and the two groups of stacking disc support plates are arranged in a spaced and opposite mode.

[0012] The upper surfaces of the two groups of stacking disc support plates are provided with grooves on the sides close to each other.

[0013] The lifting conveying mechanism, the X-axis conveying mechanism, the jacking assembly and the stacking disc assembly are provided with sensors.

[0014] Compared with the prior art, the utility model has the beneficial effects that through the collaborative work of the screw rod lifting double-layer conveying assembly and the top layer conveying assembly and the bottom layer conveying assembly, double-layer conveying design is realized, the vertical space is efficiently utilized, full load and empty tray are separated, path conflict is avoided, and the cycle time is shortened, the cooperation of the Z-axis jacking assembly and the stacking disc assembly ensures the stability of tray layering and stacking, manual intervention is reduced, and automatic feeding and discharging operation is provided for the material taking of the automatic production line station. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACHED Figure 1 It is the external structure schematic diagram of the utility model.

[0016] Figure 2 is a schematic view of the internal structure of the present application. Figure 2 Figure 2 is a schematic view of the internal structure of the present application.

[0017] Figure 2 is a schematic view of the internal structure of the present application. Figure 3 Figure 2 is a schematic view of the internal structure of the present application.

[0018] Figure 2 is a schematic view of the internal structure of the present application. Figure 4 Figure 2 is a schematic view of the internal structure of the present application.

[0019] Figure 2 is a schematic view of the internal structure of the present application. Figure 5 Figure 2 is a schematic view of the internal structure of the present application.

[0020] Figure 2 is a schematic view of the internal structure of the present application. Figure 6 Figure 2 is a schematic view of the internal structure of the present application.

[0021] Figure 2 is a schematic view of the internal structure of the present application. Figure 7 Figure 2 is a schematic view of the internal structure of the present application.

[0022] Figure 2 is a schematic view of the internal structure of the present application. Figure 8 Figure 2 is a schematic view of the internal structure of the present application.

[0023] Figure 2 is a schematic view of the internal structure of the present application. Figure 9 Figure 2 is a schematic view of the internal structure of the present application.

[0024] Reference signs in the drawings:

[0025] 1, screw lifting double-layer conveying assembly; 11, lifting conveying mechanism; 111, support seat; 112, second transmission shaft; 113, Y-axis conveying belt; 114, second motor; 115, lifting platform; 116, third transmission shaft; 117, second X-axis conveying belt; 118, third motor; 119, second sliding rail; 120, rotating wheel; 121, rotating wheel seat; 122, rotating wheel cylinder; 123, inclined surface; 124, synchronous wheel; 125, movable seat; 13, first lifting mechanism; 131, first screw; 132, first screw motor; 133, first sliding rail; 134, lifting seat; 135, first nut;

[0026] 2, top layer conveying assembly; 21, X-axis conveying mechanism; 211, first transmission shaft; 212, first X-axis conveying belt; 213, first motor; 22, Z-axis lifting assembly; 221, lifting plate; 222, pressing plate; 223, pressing plate cylinder; 224, fixed plate; 225, lifting plate; 226, optical axis; 227, second screw; 228, second screw motor; 229, shaft sleeve; 23, stacking disc assembly; 231, stacking disc support plate; 232, groove; 233, stacking disc cylinder;

[0027] 3, bottom layer conveying assembly; 4, rack; 5, tray. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the technical scheme of the utility model clearer, the technical scheme of the utility model embodiments will be clearly and completely described below in combination with the drawings of the utility model specific embodiments. The same reference signs in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the utility model protection.

[0029] Unless otherwise defined, technical terms or scientific terms used herein should be understood as their common meanings to those of ordinary skill in the art to which the utility model belongs. The utility model patent utility model specification and the claims use "comprise" and similar words to mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, and other elements or objects are not excluded. "Set", "connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0030] As shown in Figures 1-9 The utility model provides a double -deck tray automatic feeding and discharging machine, including frame 4, the frame 4 is provided with screw rod lifting double -deck conveying assembly 1, top layer conveying component 2, bottom layer conveying component 3 in, the screw rod lifting double -deck conveying assembly 1 includes two groups of lifting conveying mechanism 11 that are set up in the interval, the first lifting mechanism 13 that controls two groups of lifting conveying mechanism 11 lifts, the lifting conveying mechanism 11 is used for conveying tray 5 along X -axis direction, Y -axis direction, the X -axis direction is perpendicular to Y -axis direction, the top layer conveying component 2, bottom layer conveying component 3 is parallelly arranged in the same side of screw rod lifting double -deck conveying assembly 1, the lifting conveying mechanism 11 is docked with top layer conveying component 2, bottom layer conveying component 3 under the action of first lifting mechanism 13, to convey tray 5 between lifting conveying mechanism 11 and top layer conveying component 2, bottom layer conveying component 3. The top layer conveying component 2, bottom layer conveying component 3 all include the X -axis conveying mechanism 21 that is set up in sequence along X -axis direction, and each group X -axis conveying mechanism 21 includes two groups of first X -axis conveying belt 212 that are synchronously driven through first transmission shaft 211, and the first motor 213 of first transmission shaft 211 drive connection, and the two groups of first X -axis conveying belt 212 of X -axis conveying mechanism 21 close to the side of screw rod lifting double -deck conveying assembly 1 is provided with Z -axis jacking assembly 22 and stacking assembly 23.

[0031] The utility model discloses when using, the tray 5 of carrying material of the stack of the top layer conveying assembly 2 along X axle direction is conveyed to Z axle jacking assembly 22 position from the side of screw rod lifting double -deck conveying assembly 1, at this time, Z axle jacking assembly 22 lifts the whole tray 5, and the tray 5 of the second layer of bottom is stuck by the tray assembly 23, and the tray 5 of the bottom layer is individually lowered to the top layer conveying assembly 2 under the action of Z axle jacking assembly 22, and the layering is completed. The tray 5 of the bottom layer after separation continues along X axle direction and is conveyed to the lifting conveying mechanism 11 of the upper layer of screw rod lifting double -deck conveying assembly 1, and then is conveyed to the automatic production line station (not shown in the drawing) along Y axle direction and carries out the material taking, and the empty tray after material taking flows back to the station of screw rod lifting double -deck conveying assembly 1, can flow back to the lifting conveying mechanism 11 of the lower layer along Y axle direction according to need, and is switched to the lifting conveying mechanism 11 of the lower layer and the bottom layer conveying assembly 3 by the first lifting mechanism 13 and is connected, and the empty tray 5 is conveyed to the bottom layer conveying assembly 3 along X axle direction, and the tray 5 is stacked at the Z axle jacking assembly 22 and the tray assembly 23 position of the bottom layer conveying assembly 3, and the tray 5 is stacked. The tray 5 is stacked at the Z axle jacking assembly 22 position of the tray 5 of the layer by the tray assembly 23 after the tray 5 of the layer is lifted to the tray assembly 23 position by Z axle jacking assembly 22, and the tray 5 of the layer is stuck by the tray assembly 23 after the tray 5 of the layer is released, and the tray 5 of the layer can be completed stacking operation. The empty tray 5 of the stack is continued along X axle direction and is conveyed after stacking operation is completed, and is taken away by artificial or mechanical hand after being sent out the station of bottom layer conveying assembly 3. The utility model discloses the collaborative work of screw rod lifting double -deck conveying assembly 1 and the top layer conveying assembly 2, the bottom layer conveying assembly 3, realizes double -deck conveying design, and the vertical space is efficiently utilized, and the full load and empty tray are branched, avoid path conflict, shorten the cycle time, and the cooperation of Z axle jacking assembly 22 and tray assembly 23 ensures the stability of tray layering and stacking, reduces artificial intervention, and provides automatic feeding operation for the material taking of automatic production line station.

[0032] In an embodiment, the lifting conveying mechanism 11 includes a support seat 111 lifted under the action of the first lifting mechanism 13, two groups of Y axle conveying belts 113 driven synchronously through the second transmission shaft 112 arranged on the support seat 111, a second motor 114 in transmission connection with the second transmission shaft 112, a lifting table 115 arranged between the two groups of Y axle conveying belts 113 on the support seat 111, two groups of second X axle conveying belts 117 driven synchronously through the third transmission shaft 116 arranged on the lifting table 115, and a third motor 118 in transmission connection with the third transmission shaft 116.

[0033] Specifically, two groups of synchronous wheels 124 are arranged on the two side vertical plates of the support base 111 in the conveying direction, and the Y-axis conveying belt 113 is arranged around the two groups of synchronous wheels 124. One end of the synchronous wheel 124 is connected to the vertical plate of the support base 111 through the movable seat 125, the synchronous wheel 124 is rotatably connected to the movable seat 125, and the movable seat 125 is movably fixed to the support base 111 in the Y-axis direction, so as to adjust the tightness of the Y-axis conveying belt 113. The other end of the synchronous wheel 124 arranged on the two side vertical plates of the support base 111 is connected through the second transmission shaft 112, and the output shaft of the second motor 114 is connected to the second transmission shaft 112 through a belt drive, so that the second motor 114 drives the two groups of Y-axis conveying belts 113 to run, so as to convey the tray 5 in the Y-axis direction. The setting structure of the second X-axis conveying belt 117 is consistent with that of the Y-axis conveying belt 113, the output shaft of the third motor 118 is connected to the third transmission shaft 116 through a belt drive, so that the third motor 118 drives the two groups of second X-axis conveying belts 117 to run, so as to convey the tray 5 in the X-axis direction.

[0034] In an embodiment, the lifting platform 115 is slidably connected to the support base 111 through the second sliding rail 119, a rotating wheel 120 is rotatably arranged on the lifting platform 115, a rotating wheel seat 121 is arranged on the support base 111, a rotating wheel cylinder 122 is arranged to control the translation of the rotating wheel seat 121, the rotating wheel seat 121 is slidably connected to the support base 111 through the third sliding rail 123, and the rotating wheel seat 121 has an inclined surface 123 in contact with the rotating wheel 120.

[0035] In this embodiment, under the action of the rotating wheel cylinder 122, the rotating wheel seat 121 moves, and because the rotating wheel 120 is in contact with the inclined surface of the rotating wheel seat 121, the lifting platform 115 will rise or fall along the Z-axis direction.

[0036] In an embodiment, the first lifting mechanism 13 includes a first lead screw 131 rotatably arranged on the rack 4, a first lead screw motor 132 in transmission connection with the first lead screw 131, two groups of first sliding rails 133 fixedly arranged on the rack 4, and a lifting seat 134. The two groups of first sliding rails 133 are respectively located on the two sides of the first lead screw 131 to ensure the stability of the vertical movement of the lifting seat 134. The lifting seat 134 is slidably connected to the first sliding rail 133, and a first nut 135 matched with the first lead screw 131 is further arranged on the lifting seat 134. The lifting conveying mechanism 11 is arranged on the lifting seat 134.

[0037] In this embodiment, the first screw rod 131 can be rotatably arranged on the frame 4 through a bearing, the first screw rod motor 132 is fixedly arranged on the frame 4, the output shaft of the first screw rod motor 132 is connected with the first screw rod 131 through a shaft coupling, the first nut 135 is engaged with the first screw rod 131 to convert the rotary motion into linear motion, and the lifting of the first nut 135 is realized, so that the first screw rod 131 is driven to rotate under the action of the first screw rod motor 132, and the lifting conveying mechanism 11 moves up and down stably.

[0038] In an embodiment, the first X-axis conveying belt 212 of the X-axis conveying mechanism 21 on the top conveying assembly 2 and the bottom conveying assembly 3 is arranged in the same structure as the Y-axis conveying belt 113, so that the first X-axis conveying belt 212 is driven to run by the operation of the first motor 213, and the conveying of the tray 5 is realized.

[0039] In an embodiment, the Z-axis lifting assembly 22 comprises a lifting plate 221, a second lifting mechanism for controlling the lifting of the lifting plate 221, a plurality of pressing plates 222 arranged on the outer periphery of the lifting plate 221, and a pressing plate cylinder 223 for controlling the lifting of the pressing plate 222, the pressing plate 222 is located on the upper side of the lifting plate 221, and the tray 5 is fixed between the pressing plate 222 and the lifting plate 221 under the action of the pressing plate cylinder 223, so as to ensure the stability of the lifting of the tray 5.

[0040] In an embodiment, the second lifting mechanism comprises a fixed plate 224 located on the lower side of the lifting plate 221, a lifting plate 225 located on the lower side of the fixed plate 224, a plurality of optical shafts 226 movably arranged on the fixed plate 224, a second screw rod 227 rotatably arranged on the fixed plate 224, a second screw rod motor 228 in transmission connection with the second screw rod 227, and a second nut arranged on the lifting plate 225 and matched with the second screw rod 227, which converts the rotary motion of the second screw rod 227 into the linear motion of the lifting plate 225; the upper end and the lower end of the optical shaft 226 are connected with the lifting plate 221 and the lifting plate 225 respectively, the fixed plate 224 is provided with a shaft sleeve 229 matched with the optical shaft 226, and the shaft sleeve 229 provides sliding guide for the optical shaft 226, so as to realize the upward and downward sliding of the optical shaft 226 and improve the smoothness of the lifting motion.

[0041] In this embodiment, the output shaft of the second screw rod motor 228 can be connected with the second screw rod 227 through a belt transmission, the second screw rod motor 228 is operated to drive the second screw rod 227 to rotate, the second nut on the lifting plate 225 is engaged with the second screw rod 227, and moves along the axial direction (vertical direction) with the rotation of the second screw rod 227, so that the lifting plate 225 drives the lifting plate 221 to synchronously lift through the optical shaft 226, and the vertical motion of the load is realized. This embodiment realizes the stable and reliable vertical lifting of the lifting plate 221 through the combination of the second screw rod 227 and the optical shaft 226.

[0042] In an embodiment, the stacker assembly 23 comprises two groups of stacker support plates 231 slidingly arranged on the support base 111, a stacker cylinder 233 for controlling the movement of the stacker support plates 231, and the two groups of stacker support plates 231 are spaced apart and arranged oppositely.

[0043] In an embodiment, the upper surfaces of the two groups of stacker support plates 231 are provided with grooves 232 on the side close to each other.

[0044] In an embodiment, sensors are arranged at the positions of the lifting conveying mechanism 11, the X-axis conveying mechanism 21, the jacking assembly 22 and the stacker assembly 23 to sense the in-place condition of the tray 5.

[0045] It should be understood by those skilled in the art that the above-mentioned embodiments are only examples and are not limiting, and various modifications, combinations, partial combinations and replacements can be made to the embodiments of the utility model according to design requirements and other factors, as long as they are within the scope of the appended claims or their equivalents, which belong to the scope of protection of the utility model.

Claims

1. A double-layer tray automatic feeding and discharging machine comprising a rack, characterized in that, The rack is internally provided with a screw lifting double-layer conveying assembly, a top-layer conveying assembly and a bottom-layer conveying assembly. The screw lifting double-layer conveying assembly comprises two groups of lifting conveying mechanisms arranged in an upper and lower spaced manner, and a first lifting mechanism for controlling the lifting of the two groups of lifting conveying mechanisms. The lifting conveying mechanisms are used for conveying trays in the X-axis direction and the Y-axis direction. The top-layer conveying assembly and the bottom-layer conveying assembly are arranged in parallel on the same side of the screw lifting double-layer conveying assembly. The top-layer conveying assembly and the bottom-layer conveying assembly each comprise a plurality of groups of X-axis conveying mechanisms arranged in the X-axis direction in sequence. Each group of the X-axis conveying mechanisms comprises two groups of first X-axis conveying belts synchronously driven by a first transmission shaft. A Z-axis lifting assembly and a tray stacking assembly are arranged between the two groups of first X-axis conveying belts of the X-axis conveying mechanism on the side close to the screw lifting double-layer conveying assembly.

2. The automatic double-deck tray loading and unloading machine according to claim 1, characterized in that, The lifting conveying mechanism comprises a support base lifted under the action of the first lifting mechanism, and two groups of Y-axis conveying belts synchronously driven by a second transmission shaft arranged on the support base. A liftable lifting table is arranged between the two groups of Y-axis conveying belts on the support base. Two groups of second X-axis conveying belts synchronously driven by a third transmission shaft are arranged on the lifting table.

3. The automatic double-deck tray loading and unloading machine according to claim 2, characterized in that, The lifting table is slidingly connected with the support base. A rotating wheel is rotatably arranged on the lifting table. A rotating wheel seat is arranged on the support base. A rotating wheel cylinder is arranged for controlling the translation of the rotating wheel seat. The rotating wheel seat is slidingly connected with the support base. The rotating wheel seat has an inclined surface in contact with the rotating wheel.

4. The automatic double-deck tray loading and unloading machine according to claim 1, characterized in that, The first lifting mechanism comprises a first screw rotatably arranged on the rack, a first screw motor in transmission connection with the first screw, two groups of first sliding rails fixedly arranged on the rack, and a lifting seat. The two groups of first sliding rails are respectively located on the two sides of the first screw. The lifting seat is slidingly connected with the first sliding rails. A first screw nut matched with the first screw is further arranged on the lifting seat. The lifting conveying mechanism is arranged on the lifting seat.

5. The automatic loading and unloading machine for double-layer pallets according to claim 1, characterized in that, The Z-axis lifting assembly comprises a lifting plate, a second lifting mechanism for controlling the lifting of the lifting plate, a plurality of pressing plates arranged on the outer periphery of the lifting plate, and a pressing plate cylinder for controlling the lifting of the pressing plates. The pressing plates are located on the upper side of the lifting plate. Under the action of the pressing plate cylinder, the trays are fixed between the pressing plates and the lifting plate.

6. The automatic loading and unloading machine for double-layer pallets according to claim 5, characterized in that, The second lifting mechanism comprises a fixed plate located on the lower side of the lifting plate, a lifting plate located on the lower side of the fixed plate, a plurality of optical shafts movably arranged on the fixed plate, a second screw rotatably arranged on the fixed plate, and a second screw motor in transmission connection with the second screw. A second screw nut matched with the second screw is arranged on the lifting plate. The upper end and the lower end of the optical shaft are respectively connected with the lifting plate and the lifting plate. The fixed plate is provided with a shaft sleeve matched with the optical shaft.

7. The automatic double-deck tray loading and unloading machine according to claim 1, characterized in that, The tray stacking assembly comprises two groups of tray stacking support plates slidingly arranged on the support base, and a tray stacking cylinder for controlling the movement of the tray stacking support plates. The two groups of tray stacking support plates are arranged in a spaced and opposite manner.

8. The automatic double-deck tray loading and unloading machine according to claim 7, characterized in that, The upper surfaces of the two groups of tray stacking support plates are provided with grooves on the sides close to each other.

9. The automatic double-deck tray loading and unloading machine according to claim 1, characterized in that, Sensors are arranged at the positions of the lifting conveying mechanism, the X-axis conveying mechanism, the lifting assembly and the tray stacking assembly.

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