Automatic tray supply equipment

Abstract

The utility model discloses an automatic tray feeding device for material trays, which relates to the technical field of automation equipment, comprises a processing line, a loading device and a unloading device, wherein the loading device and the unloading device are respectively located at two ends of the processing line, a plurality of material trays are stacked on the feeding tray, a pushing frame pushes the stacked material trays into two groups of fork frames of a lifting assembly, the two groups of fork frames drive the stacked material trays to descend to the processing line, the two groups of fork frames are away from each other so that the stacked material trays of the fork frames fall into the processing line, the two groups of fork frames are close to each other so that the two groups of fork frames can receive the stacked material trays, after the processing of the processing line is completed, the stacking device stacks the used material trays, the pushing frame pushes the material trays of the stacking device to a discharging platform, the stacked material trays are placed on the feeding platform and the discharging platform transfers the processed material trays, both of which do not affect the work of the processing line, and the material trays can be taken out without stopping, the feeding tray and the discharging tray can cache the stacked material trays, and the AGV robot can be connected to automatically feed and take the trays, thereby improving production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of automation equipment, in particular to an automatic tray supply device for a material tray. Background Art

[0002] Usually, a tray is also called a pallet or tray. In the process of electronic component assembly, production, and transportation, multiple tiny workpieces or products are loaded on a tray as a carrier, which is widely used. In related technologies, a single tray is placed in a machine, and a single workpiece is taken out of the tray or put into the tray in turn through an automated structure such as a robotic arm to achieve automatic loading or unloading of a single workpiece. However, the tray cannot be cached, and each time the tray is taken out and placed, the robotic arm and other automated equipment need to be stopped. It cannot be connected to the AGV intelligent handling robot, which is not conducive to improving production efficiency. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide an automatic tray supplying device for material trays, so as to realize automatic tray supplying and tray retrieval by docking with an AGV robot, and to cache material trays to avoid shutdown of parts production automation equipment during tray supplying and tray retrieval.

[0004] According to an embodiment of the utility model, there is provided an automatic tray supply device, comprising:

[0005] Processing lines;

[0006] The loading device is located at one end of the processing line and is equipped with a feeding table, a pushing frame and a lifting assembly. Several trays can be stacked on the feeding table. The pushing frame is located on one side of the feeding table. The lifting assembly is equipped with two sets of fork frames that can move closer or farther away from each other. The pushing frame can push several trays onto the fork frames, and the lifting assembly can drive the trays down to the processing line.

[0007] The unloading device is located at one end of the processing line away from the loading device, and is arranged with a discharging table and a pushing rack. The processing line is provided with a stacking device for stacking material trays. The stacking device is located at one end of the processing line away from the loading device, and the discharging table is located on one side of the stacking device. The pushing rack can push the stacked material trays on the stacking device to the discharging table.

[0008] The utility model describes an automatic tray feeding device for material trays which has at least the following beneficial effects: the embodiment is provided with a processing line, a loading device and a unloading device, the loading device and the unloading device are respectively located at two ends of the processing line, the loading device is provided with a feeding table, a pushing frame and a lifting assembly, a plurality of material trays can be stacked on the feeding table, the pushing frame is located at one side of the feeding table, the lifting assembly is provided with two groups of fork frames which can approach or move away from each other, the pushing frame can push a plurality of material trays onto the fork frames, the lifting assembly can drive the material trays down to the processing line, the unloading device is provided with a discharging table and a pushing frame, the processing line is provided with a stacking device for stacking material trays, the stacking device is located at one end of the processing line away from the loading device, the discharging table is located at one side of the stacking device, and the pushing frame can push the stacked material trays on the stacking device to the discharging table.

[0009] The two forks move toward each other so that the two forks can receive the stacked trays, and the stacking device stacks the trays used, and the push-out device pushes the trays of the stacking device to the discharging platform. Placing the stacked trays on the feeding platform and transferring the processed trays from the discharging platform do not affect the operation of the processing line, and the material trays can be taken out without stopping. The loading and unloading of the trays can cache the stacked trays, and the AGV robot can be connected to automatically supply and take out the trays, thereby improving production efficiency.

[0010] According to the automatic tray feeding device of the utility model, the lifting component is provided with a first motor, the first motor is connected to a screw, the screw runs through the first motor, both ends of the screw are provided with threads with opposite rotation directions, two groups of fork frames are respectively provided with threaded holes, and the two groups of fork frames are respectively passed through the two ends of the screw.

[0011] According to the automatic tray feeding device of the utility model, the feeding frame is provided with a pushing rod arranged along the vertical direction, the feeding table is provided with a slot arranged along the width direction, and the pushing rod can move along the slot.

[0012] According to the automatic tray feeding device of the utility model, the pushing-out frame is provided with a pushing-out rod arranged in a vertical direction, and the pushing-out rod can push the stacked trays to the discharging platform.

[0013] According to the automatic tray feeding device of the utility model, the processing line is arranged with a frame, and guide rails supporting the two ends of the tray are provided on both sides of the frame. The tray can slide along the guide rails, and when the lifting assembly descends, several stacked trays can be placed in the guide rails.

[0014] According to the automatic tray feeding device of the utility model, tray dividing assemblies are arranged on both sides of the frame, and the tray dividing assemblies are provided with fork plates. The two fork plates can move horizontally toward each other to between two stacked trays. When the tray dividing assembly is raised, a single tray can be left on the guide rail.

[0015] According to the automatic tray feeding equipment of the utility model, a displacement device is arranged inside the frame, and the displacement device can move along the length direction of the frame. The displacement device includes a displacement seat, a receiving tray, and a first cylinder. The displacement seat is slidably connected to the frame, and the first cylinder is installed on the displacement seat. The first cylinder can drive the receiving tray to rise and fall.

[0016] According to the automatic tray feeding device of the material tray described in the utility model, the receiving tray is equipped with a clamping assembly, two clamping assemblies are arranged at intervals along the length direction of the receiving tray, and the clamping assemblies can be movably clamped on both sides of the material tray.

[0017] According to the automatic tray feeding device of the utility model, a convex block is provided at one end of the receiving tray close to the stacking device, and the convex block is located on the loading surface of the receiving tray. The convex block can push the tray located on the guide rail to the stacking device.

[0018] According to the automatic tray feeding equipment of the utility model, the stacking device is arranged with a check piece and a lifting assembly, the check piece is rotatably connected to the frame, the check piece can be flipped unidirectionally, two check pieces are located on both sides of the lifting assembly, and the lifting assembly can lift the tray to the check piece.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 This is an axonometric view of an automatic tray feeding device for a material tray in an embodiment of the utility model;

[0022] Figure 2 It is a top view of an automatic tray feeding device of a material tray in an embodiment of the utility model;

[0023] Figure 3 for Figure 1 A partial enlarged view of the middle A area;

[0024] Figure 4 It is a partial enlarged view of an automatic tray feeding device of a material tray in an embodiment of the utility model;

[0025] Figure 5 for Figure 1 A partial enlarged view of the B area;

[0026] Figure 6 It is a partial enlarged view of a cross-sectional view of an automatic tray feeding device of a material tray in an embodiment of the utility model;

[0027] Figure 7 It is an axonometric view of the displacement mechanism and the lifting mechanism in the embodiment of the utility model;

[0028] Figure 8 It is a partial enlarged view of another cross-sectional view of an automatic tray feeding device of a material tray in an embodiment of the utility model;

[0029] Fig. 9 It is a partially enlarged view of another cross-sectional view of an automatic tray feeding device of a material tray in an embodiment of the utility model.

[0030] Reference numerals:

[0031] Processing line 100; stacking device 110; lifting assembly 111; check member 112; plane 113; arc surface 114; frame 120; guide rail 121; mounting groove 122; plate dividing assembly 130; fork plate 131; mounting table 132; displacement device 140; displacement seat 141; receiving plate 142; first cylinder 143; clamping assembly 144; protrusion 145; clamping cylinder 146; torsion spring 150; processing position 160;

[0032] Feeding device 200; feeding platform 210; slot 211; push frame 220; push rod 221; lifting assembly 230; fork frame 231; mounting block 232; first motor 233; lead screw 234; second motor 235; first guide rod 240; first slider 250; second guide rod 260; second slider 270;

[0033] Unloading device 300; unloading platform 310; ejection rack 320; ejection rod 321;

[0034] Material tray 400; containing tank 410. DETAILED DESCRIPTION

[0035] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0036] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figure 1 and Figure 2 The embodiment of the utility model provides an automatic tray feeding device for a material tray, including a processing line 100, a loading device 200 and a unloading device 300, the loading device 200 and the unloading device 300 are respectively located at the two ends of the processing line 100, the loading device 200 is arranged with a feeding table 210, a pushing frame 220 and a lifting assembly 230, a plurality of material trays 400 can be stacked on the feeding table 210, the pushing frame 220 is located on one side of the feeding table 210, the lifting assembly 230 is provided with two groups of fork frames 231 that can approach or move away from each other, and the pushing frame 220 can push a plurality of material trays 400 on the feeding table 210. The tray 400 is pushed onto the fork frame 231, the pushing frame 220 can push several trays 400 onto the fork frame 231, the lifting assembly 230 can drive the tray 400 to descend to the processing line 100, the unloading device 300 is arranged with a discharge table 310 and a push-out frame 320, the processing line 100 is provided with a stacking device 110 for stacking the trays 400, the stacking device 110 is located at one end of the processing line 100 away from the loading device 200, the discharge table 310 is located on one side of the stacking device 110, and the push-out frame 320 can push the trays 400 stacked on the stacking device 110 to the discharge table 310.

[0040] In an embodiment of the utility model, an automatic tray feeding device for a material tray is used. A plurality of stacked material trays 400 are placed on a feeding table 210. The pushing frame 220 pushes the stacked material trays 400 onto two sets of fork frames 231 of the lifting assembly 230. The two sets of fork frames 231 drive the stacked material trays 400 to descend to the processing line 100. The two sets of fork frames 231 move away from each other so that the material trays 400 fall into the processing line 100. The fork frames 231 rise to the horizontal plane where the feeding table 210 is located. The two sets of fork frames 231 move toward each other so that the two sets of fork frames 231 can receive the stacked material trays 400, thereby realizing automatic transportation of the material trays 400 to the processing position. The processing line 100 After the processing is completed, the stacking device 110 stacks the used material trays 400, and the push-out rack 320 pushes the stacked material trays 400 on the stacking device 110 to the discharging rack. The stacked material trays 400 are placed on the feeding table 210 and transferred on the discharging table 310 through the pushing rack 220 and the pushing rack 320, which do not affect the operation of the processing line 100, and the material trays 400 can be taken and placed without stopping. The loading and unloading of the material trays 400 can cache the stacked material trays 400, and can be connected to the AGV robot to take and place the material trays 400 from the feeding table 210 and the discharging table 310, so as to realize automatic supply and retrieval of the material trays 400 and improve production efficiency.

[0041] Reference Figures 1 to 3 Optionally, in some embodiments of the utility model, the pushing rack 220 is provided with a pushing rod 221 arranged along the vertical direction, and the feeding table 210 is provided with a slot 211 arranged along the width direction. The pushing rod 221 can move along the slot 211, and the pushing rack 220 is connected to a cylinder to drive the pushing rack 220 to move, and the pushing rod 221 moves along the slot 211. The pushing rod 221 pushes the stacked material trays 400 on the feeding table 210 to the lifting assembly 230 to realize automatic loading of the material trays 400. When the stacked material trays 400 are loaded onto the feeding table 210, the processing line 100 does not need to be stopped, and the feeding table 210 can be connected to the AGV robot to load the stacked material trays 400, thereby improving production efficiency.

[0042] Reference Figure 1 and Figure 2 The ejection rack 320 is provided with an ejection rod 321 arranged in the vertical direction. The ejection rack 320 is connected to a cylinder. The cylinder drives the ejection rack 320 to move in the horizontal direction. The ejection rod 321 pushes the material tray 400 on the stacking device 110 to the unloading platform 310, thereby realizing automatic unloading of the material tray 400. When the stacked material tray 400 on the unloading platform 310 is unloaded, the processing line 100 does not need to be shut down, and the unloading platform 310 can be connected to the AGV robot to transfer the material tray 400, thereby improving production efficiency.

[0043] Reference Figure 4Optionally, the lifting assembly 230 is provided with a first motor 233, and the first motor 233 is connected to a lead screw 234, the lead screw 234 passes through the first motor 233, and both ends of the lead screw 234 are provided with threads with opposite rotation directions, and the two groups of fork frames 231 are respectively provided with threaded holes, and the two groups of fork frames 231 pass through the two ends of the lead screw 234, and the threaded holes of the two groups of fork frames 231 respectively match the threads at both ends of the lead screw 234, and the first motor 233 drives the lead screw 234 to rotate so that the two groups of fork frames 231 move closer to or away from each other.

[0044] Optionally, the length of the lead screw 234 is greater than the length of the material tray 400 , so that the two sets of fork frames 231 can move away from each other until the material tray 400 is detached from the fork frames 231 , and the material tray 400 on the fork frames 231 can fall into the processing line 100 .

[0045] Reference Figure 4 Optionally, the lifting assembly 230 is provided with a mounting block 232 , the first motor 233 is mounted on the mounting block 232 , the mounting block 232 is connected to a second motor 235 , and the second motor 235 drives the lifting movement of the lifting assembly 230 .

[0046] Reference Figure 4 Optionally, the mounting block 232 is fixedly connected to a first guide rod 240 arranged horizontally, the first guide rod 240 is slidably connected to a first slider 250, the first slider 250 is fixedly connected to the fork frame 231, the first slider 250 and the first guide rod 240 can provide guidance for the two groups of fork frames 231 to move closer to or away from each other, so that the two groups of fork frames 231 can move closer to or away from each other more smoothly, and the processing line 100 is arranged with a second guide rod 260 in the vertical direction, the second guide rod 260 is slidably connected to the second slider 270, the second slider 270 is fixedly connected to the first guide rod 240, the second slider 270 and the second guide rod 260 can provide guidance for the lifting movement of the lifting assembly 230, so that the lifting movement of the lifting assembly 230 can be smoother.

[0047] Reference Figure 1 and Figure 6 Optionally, the processing line 100 is arranged with a frame 120, and guide rails 121 are provided on both sides of the frame 120 to support the two ends of the material tray 400. The material tray 400 can slide along the guide rails 121, and the push-in frame 220 pushes the stacked material trays 400 onto the fork frame 231 of the lifting assembly 230. The fork frame 231 drives the material tray 400 down to the frame 120, and the two groups of fork frames 231 move away from each other so that the material tray 400 falls into the guide rails 121, so as to complete the transportation of the material tray 400 to the frame 120 of the processing line 100.

[0048] Optionally, a displacement device 140 is provided inside the frame 120, and a processing position 160 is provided on the frame 120. The processing position 160 is located between the tray assembly 130 and the stacking device 110. Parts in a single tray 400 are taken or placed at the processing position 160. After processing, the displacement device 140 transports the single tray 400 to the stacking device 110 for stacking and unloading.

[0049] Reference Figure 5 Optionally, a tray assembly 130 is arranged on both sides of the rack 120, and the tray assembly 130 is located below the lifting assembly 230. The tray assembly 130 is arranged with a fork plate 131 and a mounting platform 132. The fork plate 131 is installed on the mounting platform 132. The mounting platform 132 is connected to a cylinder to drive the mounting platform 132 and the fork plate 131 to move horizontally. The tray assembly 130 is connected to a cylinder so that the tray assembly 130 can move up and down. After the lifting assembly 230 transports the material tray 400 to the guide rail 121, the fork plates 131 on both sides of the rack 120 move toward each other, and the fork plates 131 on both sides of the rack 120 move to the penultimate material tray 400 and the penultimate second Between the material trays 400, the tray separation assembly 130 rises, so that the fork frame 231 drives the penultimate material tray 400 and the material tray 400 above it to rise, so that a single material tray 400 is left on the guide rail 121, and the displacement device 140 transports the single material tray 400 on the guide rail 121 to the processing position 160. At this time, the tray separation assembly 130 descends, driving the material tray 400 on the fork frame 231 to descend to the guide rail 121, and the fork plates 131 on both sides of the frame 120 move away from each other, so that the material tray 400 falls into the guide rail 121. Repeating the above steps can realize the separation of the stacked material trays 400 into single material trays 400 in sequence, and realize the processing of the single material trays 400 in sequence.

[0050] Reference Figure 5 Optionally, a receiving groove 410 is provided at the edge of the material tray 400, and the receiving groove 410 has a space for accommodating the fork plate 131. The fork plate 131 moves horizontally into the receiving groove 410 of the penultimate material tray 400, and the tray separation assembly 130 rises. The fork plate 131 supports the bottom surface of the penultimate material tray 400, driving the penultimate and above material trays 400 to rise, so that a single material tray 400 is left on the guide rail 121. The receiving groove 410 makes the material tray 400 more stable when the fork frame 231 separates the single material tray 400, thereby preventing the fork frame 231 from moving to cause the material tray 400 to shake.

[0051] Reference Figure 6 and Figure 7Optionally, the displacement device 140 is located inside the frame 120, and the displacement device 140 can move along the length direction of the frame 120. The displacement device 140 is located below the guide rail 121. The displacement device 140 includes a displacement seat 141, a receiving plate 142, and a first cylinder 143. The displacement seat 141 is slidably connected to the frame 120 so that the displacement device 140 can move along the length direction of the frame 120. The first cylinder 143 is installed on the displacement seat 141. The first cylinder 143 is connected to the receiving plate 142. The first cylinder 143 drives the receiving plate 142 to rise and fall. The bearing surface of the receiving plate 142 is used to bear a single material tray 400.

[0052] Reference Figure 7 and Figure 8 Optionally, the receiving plate 142 is equipped with a clamping assembly 144, which is arranged at intervals along the length direction of the receiving plate 142, and the clamping assembly 144 is connected to a clamping cylinder 146, which is installed on the receiving plate 142, and the clamping cylinder 146 drives the clamping assembly 144 to move horizontally, and the clamping assembly 144 can move toward each other and clamp on both sides of the material tray 400,

[0053] The receiving tray 142 is provided with a protrusion 145 at one end close to the stacking device 110, and the protrusion 145 is located on the loading surface of the receiving tray 142. The protrusion 145 can push the material tray 400 located on the guide rail 121 to the stacking device 110. When the tray dividing assembly 130 leaves a single material tray 400 on the guide rail 121, the displacement assembly moves along the length direction of the frame 120 to move the receiving tray 142 to below the single material tray 400. The first cylinder 143 drives the receiving tray 142 to rise so that the supporting tray receives the material tray 400. The two groups of clamping assemblies 144 are close to each other and clamped on both sides of the single material tray 400. The displacement device 140 moves along the length direction of the frame 120, driving the single material tray 400 to move to the processing position 160 in the guide rail 121 for processing. After the processing is completed, the two groups of clamping assemblies 144 move away from each other. Component 144 moves away from the material tray 400, and the first cylinder 143 drives the receiving plate 142 to descend. The receiving plate 142 moves from the bottom of the material tray 400 along the length direction of the frame 120 to the tray assembly 130, and the receiving plate 142 rises to abut against the new single material tray 400. The two sets of clamping components 144 move toward each other to clamp the two ends of the new material tray 400, and the displacement mechanism moves along the length direction of the frame 120 to drive the new material tray 400 to move to the processing position 160. As the displacement device 140 drives the new material tray 400 to move, the protrusion 145 of the receiving plate 142 pushes the material tray 400 originally located at the processing position 160, and the material tray 400 moves along the guide rail 121 to the stacking device 110, completing the movement of the new material tray 400 to the processing position 160 and transferring the processed material tray 400 to the stacking device 110.

[0054] Reference Figure 1 , Figure 2 and Figure 7 Optionally, the stacking device 110 is provided with a check piece 112 and a lifting assembly 111, the displacement device 140 transports the material tray 400 of the processing position 160 to the lifting assembly 111, the check piece 112 is rotatably connected to the frame 120, the check piece 112 can be flipped in one direction, the two check pieces 112 are located on both sides of the lifting assembly 111, and the lifting assembly 111 can move up and down between the two, the check piece 112 lifts the material tray 400, and the material tray 400 pushes the check piece 112 12 is flipped, when the lifting assembly 111 drives the material tray 400 to rise to a certain height, the check piece 112 is reset, and the lifting assembly 111 drives the material tray 400 down to the check piece 112, and the check piece 112 supports the material tray 400, and the lifting assembly 111 lifts a single material tray 400 each time so that the material trays 400 are gradually stacked above the check piece 112, and the push-out rack 320 is located above the check piece 112, and the push-out rack 320 pushes the stacked material trays 400 on the check piece 112 to the discharge table 310.

[0055] Reference Figure 1 and Fig. 9 The frame 120 is provided with a mounting frame, the backstop 112 is rotatably connected to the frame 120, the frame 120 is provided with a mounting groove 122, the backstop 112 is located in the mounting groove 122, the backstop 112 is connected with a torsion spring 150, the backstop 112 is provided with an intersecting plane 113 and an arc surface 114, the plane 113 abuts against the bottom surface of the mounting groove 122, the arc surface 114 is located on the side of the backstop 112 close to the mounting groove 122, and the lifting assembly 111 drives the material tray 400 to push the backstop The return piece 112 flips upward, and the flat surface 113 abutting the bottom surface of the installation groove 122 is changed to the arc surface 114 abutting the bottom surface of the installation groove 122, so that the return piece 112 can flip upward. As the return piece 112 flips, the torsion spring 150 gradually presses the installation groove 122. After the material tray 400 detaches from the return piece 112, the elastic force of the torsion spring 150 resets the return piece 112, and the flat surface 113 of the return piece 112 abuts the bottom surface of the installation groove 122, realizing the one-way flipping of the return piece 112.

[0056] Optionally, refer to Figure 2 The check members 112 may be provided in multiple groups and symmetrically arranged on both sides of the lifting assembly 111 so that the check members 112 can support the stacked material trays 400 more stably.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An automatic tray feeding device, characterized in that: include: Processing lines; A loading device is located at one end of the processing line and is provided with a feeding table, a pushing frame and a lifting assembly. A plurality of material trays can be stacked on the feeding table. The pushing frame is located at one side of the feeding table. The lifting assembly is provided with two sets of fork frames that can move closer to or farther away from each other. The pushing frame can push a plurality of material trays onto the fork frames. The lifting assembly can drive the material trays to descend to the processing line. The unloading device is located at one end of the processing line away from the loading device, and is arranged with a discharge table and a push-out rack. The processing line is provided with a stacking device for stacking the material trays, and the stacking device is located at one end of the processing line away from the loading device. The discharge table is located on one side of the stacking device, and the push-out rack can push the material trays stacked on the stacking device to the discharge table.

2. The automatic tray feeding device according to claim 1 is characterized in that: The lifting assembly is provided with a first motor, the first motor is connected to a lead screw, the lead screw runs through the first motor, both ends of the lead screw are provided with threads with opposite rotation directions, the two fork frames are respectively provided with threaded holes, and the two fork frames are respectively passed through the two ends of the lead screw.

3. The automatic tray feeding device according to claim 1 is characterized in that: The pushing frame is provided with a pushing rod arranged in a vertical direction, and the feeding platform is provided with a slot arranged in a width direction, and the pushing rod can move along the slot.

4. The automatic tray feeding device according to claim 1 is characterized in that: The push-out frame is provided with a push-out rod arranged in a vertical direction, and the push-out rod can push the stacked material trays to the unloading platform.

5. The automatic tray feeding device according to claim 1 is characterized in that: The processing line is arranged with a frame, and guide rails supporting the two ends of the material tray are arranged on both sides of the frame. The material tray can slide along the guide rails, and when the lifting assembly descends, several stacked material trays can be placed in the guide rails.

6. The automatic tray supply device according to claim 5, characterized in that: A tray separation assembly is arranged on both sides of the frame. The tray separation assembly is provided with a fork plate. The two fork plates can move horizontally toward each other to between two stacked trays. When the tray separation assembly is raised, a single tray can be left on the guide rail.

7. The automatic tray supply device according to claim 6, characterized in that: A displacement device is arranged inside the frame, and the displacement device can move along the length direction of the frame. The displacement device includes a displacement seat, a receiving plate, and a first cylinder. The displacement seat is slidably connected to the frame, and the first cylinder is installed on the displacement seat. The first cylinder can drive the receiving plate to move up and down.

8. The automatic tray feeding device according to claim 7, characterized in that: The receiving tray is equipped with a clamping assembly, and two of the clamping assemblies are arranged at intervals along the length direction of the receiving tray. The clamping assemblies can be movably clamped on both sides of the material tray.

9. The automatic tray supply device according to claim 8, characterized in that: A protrusion is provided at one end of the receiving tray close to the stacking device. The protrusion is located on the loading surface of the receiving tray. The protrusion can push the material tray located on the guide rail to the stacking device.

10. The automatic tray supply device according to claim 9, characterized in that: The stacking device is arranged with a check piece and a lifting assembly. The check piece is rotatably connected to the frame and can be flipped unidirectionally. Two check pieces are located on both sides of the lifting assembly. The lifting assembly can lift the material tray to the check piece.

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