Tray handling apparatus
By designing a material tray loading and unloading device, and using a servo motor to drive the slide table and clamping arm, the unmanned transport vehicle can be automated for loading and unloading, which solves the problem of manual loading and unloading, reduces labor costs and improves production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN FUQIANG ELECTRONICS
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-09
Smart Images
Figure CN224336676U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a material handling device, and more particularly to a material tray picking and placing device that assists unmanned transport vehicles in loading and unloading materials. Background Technology
[0002] Automated Guided Vehicles (AGVs) have become key equipment for factory automation. In recent years, an increasing number of manufacturing industries have used AGVs to automate product manufacturing processes. Currently, most loading and unloading operations in processing stations rely on AGVs equipped with robotic arms. However, factories currently require dedicated personnel to move trays onto or remove them from the robotic arms' platforms to assist the AGVs in loading and unloading operations. This increases labor costs. Therefore, there is a need for equipment that can assist AGVs in completing loading and unloading operations. Summary of the Invention
[0003] The purpose of this utility model is to provide a tray loading and unloading device, installed on an unmanned transport vehicle, and comprising: a base; two vertical linear slide rails, the vertical linear slide rails being disposed at the rear end of the base and extending upward in a direction perpendicular to the upper surface of the base; a vertical linear slide table, the vertical linear slide table being parallel to the vertical linear slide rails and extending upward from the upper surface of the base; a vertical lifting platform, the vertical lifting platform being connected to the vertical linear slide rails and the vertical linear slide table respectively, for vertical lifting under the drive of the vertical linear slide table; two horizontal linear slide rails, the horizontal linear slide rails being fixed to the vertical lifting platform and extending in a direction parallel to the upper surface of the base; a horizontal linear slide table, the horizontal linear slide table being parallel to the horizontal linear slide rails and fixed to the vertical lifting platform; and a tray, the tray being connected to the vertical linear slide rails and extending upward from the upper surface of the base; two horizontal linear slide rails, the horizontal linear slide rails being fixed to the vertical lifting platform; and a pallet, the tray being connected to the vertical linear slide rails and extending upward from the upper surface of the base; two horizontal linear slide rails, the horizontal linear slide rails being parallel to the horizontal linear slide rails and fixed to the vertical lifting platform; and two horizontal linear slide plates, the horizontal linear slide plates being connected to the vertical linear slide rails and extending upward from the upper surface of the base; two horizontal linear slide rails, the horizontal linear slide table being parallel to the horizontal linear slide rails and fixed to the vertical lifting platform; and two horizontal linear slide plates, the horizontal linear slide rails being parallel to the horizontal linear slide rails and extending upward from the vertical lifting platform; and two horizontal linear slide plates, the horizontal linear slide rails being parallel to the horizontal linear slide rails and extending upward from the vertical linear slide table ... rails, the horizontal linear slide rails being parallel to the The system comprises: a horizontal linear slide rail and a horizontal linear slide table connected together to slide back and forth under the drive of the horizontal linear slide table; a bearing area for placing a material tray at the front end of the pallet; an actuating motor mounted on the base; an actuating gear connected to the actuating motor; two actuating racks slidably mounted on the base and respectively meshing with the two sides of the actuating gear, so that the two actuating racks move towards each other when the actuating motor rotates; and two movable clamping arms pivotally connected to the front end of the base and including an actuating end and a clamping end; wherein the actuating ends of the two movable clamping arms are respectively connected to the two actuating racks, and the clamping ends are located on two opposite sides of the pallet, so that when the actuating motor rotates, the clamping ends of the two movable clamping arms clamp or release towards the pallet.
[0004] In some embodiments, the two vertical linear slide rails include a first vertical linear slide rail and a second vertical linear slide rail. The vertical linear slide table is arranged adjacent to the first vertical linear slide rail, and the first vertical linear slide rail and the second vertical linear slide rail are arranged opposite each other. The track of the vertical linear slide table is perpendicular to the upper surface. The track of the vertical linear slide table, the track of the first vertical linear slide rail, and the track of the second vertical linear slide rail are arranged in parallel. The sliders of the first vertical linear slide rail and the second vertical linear slide rail are respectively fixed to the left and right sides of the vertical lifting platform. The vertical lifting platform is connected to the sliders of the vertical linear slide table, the sliders of the first vertical linear slide rail, and the sliders of the second vertical linear slide rail.
[0005] In some embodiments, a hidden wire chain is provided on one side of the horizontal linear slide rail. The hidden wire chain is hollow and extends upward, then bends to the right and extends downward. The left end of the hidden wire chain is fixed to the right side of the vertical lifting platform, and the right end of the hidden wire chain is fixed to the rear side of the horizontal linear slide rail.
[0006] In some embodiments, the two horizontal linear slide rails include a first horizontal linear slide rail and a second horizontal linear slide rail. The first horizontal linear slide rail is disposed on the left side of the horizontal linear slide table, and the second horizontal linear slide rail is disposed on the right side of the horizontal linear slide table. The first horizontal linear slide rail and the second horizontal linear slide rail are arranged symmetrically from left to right. The track of the horizontal linear slide table is parallel to the upper surface and extends from the rear side of the base to the front side. The track of the horizontal linear slide table, the track of the first horizontal linear slide rail, and the track of the second horizontal linear slide rail are arranged in parallel.
[0007] In some embodiments, the first horizontal linear slide rail and the second horizontal linear slide rail are each provided with a support member. The support member is cuboid in shape, and its top is fixed to a position opposite to the bottom surface of a slide plate. The front side of the bottom of the support member of the first horizontal linear slide rail is fixed to the front slider of the first horizontal linear slide rail, and the rear side of the bottom of the support member of the first horizontal linear slide rail is fixed to the rear slider of the first horizontal linear slide rail. The front side of the bottom of the support member of the second horizontal linear slide rail is fixed to the front slider of the second horizontal linear slide rail, and the rear side of the bottom of the support member of the second horizontal linear slide rail is fixed to the rear slider of the second horizontal linear slide rail.
[0008] In some embodiments, the vertical lifting platform has two opposing side walls, and two guide wheel assemblies are respectively fixed to the side walls. The guide wheel assemblies are located at the front end of the vertical lifting platform, and each guide wheel assembly has a wheel seat protruding from the side wall, a shaft extending inward from the top end of the wheel seat, and a guide wheel disposed at the end of the shaft. The guide wheels are respectively located above the front end of the first horizontal linear slide rail and above the front end of the second horizontal linear slide rail, and the top of the guide wheels abuts against the front side of the bottom surface of the pallet.
[0009] In some embodiments, the pallet is provided with two guide rails located on the left and right sides of the bottom surface of the pallet. The guide rails extend from the rear side to the front side of the bottom surface of the pallet. The guide rails are arranged symmetrically from left to right and are parallel to the tracks of the first horizontal linear slide rail and the second horizontal linear slide rail. The front end of the guide rail is placed on the guide wheel.
[0010] In some embodiments, the distance the bearing area extends forward and backward is approximately equal to the length of the tray, and the pallet is provided with two limiting corner posts arranged adjacent to the bearing area. The limiting corner posts are located at the rear edge of the bearing area and are arranged symmetrically from left to right. The distance the limiting corner posts extend upward is approximately equal to the height of the stacked trays.
[0011] In some embodiments, the clamping end is provided with a clamping plate, the clamping plate is perpendicular to the upper surface, the clamping plate is flat, and the top edge of the clamping plate is flush with the top of the clamping end, and the clamping plate extends downwards by a distance approximately equal to the height of the stacked material trays.
[0012] In some embodiments, the clamping end is provided with a stop bar, which is formed by bending inward and extending from the front edge of the clamping plate, and the vertical extension distance of the stop bar is approximately equal to the height of the stacked material trays.
[0013] As described above, the material tray loading and unloading device of this utility model uses the vertical linear slide and the horizontal linear slide driven by the servo motor, and is equipped with two linear slide rails to assist in movement. This allows the pallet to lift the material tray to the loading platform of the robotic arm of the unmanned transport vehicle or to remove the material tray from the loading platform. The movable clamping arm, driven by the actuation motor, clamps and fixes the material tray in the carrying area during the movement of the unmanned transport vehicle, thereby assisting the unmanned transport vehicle in loading and unloading operations, improving the degree of production automation, and reducing labor costs. Attached Figure Description
[0014] To make the above and other objects, features, advantages and embodiments of this utility model more apparent and understandable, the contents of this case can be better understood when read in conjunction with the accompanying drawings.
[0015] Figure 1 This is a perspective view of the material tray handling device of this utility model when a material tray is placed on it.
[0016] Figure 2 This is a perspective view of the combination of the lifting component, translation component and limiting component of this utility model.
[0017] Figure 3 This is a perspective view of the lifting component of this utility model.
[0018] Figure 4 This is a perspective view of the lifting component of this utility model from another angle.
[0019] Figure 5 This is a perspective view of the translation component of this utility model.
[0020] Figure 6 This is an exploded view of the translation component and the limiting component of this utility model.
[0021] Figure 7 This is a partial front view of the material tray handling device of this utility model when no material tray is placed.
[0022] Figure 8 This is a perspective view of the pallet of this utility model.
[0023] Figure 9 This is a perspective view of the pallet of this utility model from another angle.
[0024] Figure 10 This is a perspective view of the material tray handling device of this utility model when no material tray is placed on it.
[0025] Figure 11 This is a perspective view of the limiting component of this utility model.
[0026] Figure 12 This is a top view of the limiting component of this utility model.
[0027] Figure 13 The limiting component of this utility model is along Figure 12 A cross-sectional view of line AA.
[0028] Figure 14 This is a perspective view of the material tray handling device of this utility model when it is holding the material tray. Detailed Implementation
[0029] To explain in detail the technical content, structural features, objectives and effects of the material tray loading and unloading device of this utility model, the following embodiments are provided with reference to the accompanying drawings.
[0030] Please see Figure 1 and Figure 2The material tray picking and placing device 100 of this utility model is mounted on an unmanned transport vehicle 200 and includes a base 10 with opposite front and rear sides, a lifting assembly 20 fixed to the rear side of the base 10, a translation assembly 30 arranged parallel to the upper surface 11 of the base 10, a tray 40 arranged parallel to the translation assembly 30, and a limiting assembly 50 fixed on the base 10 and located at the front end of the tray 40.
[0031] Please see again Figures 2 to 4 The lifting assembly 20 includes a servo motor 70, a vertical linear slide 21 connected to the servo motor 70, a first vertical linear slide rail 22 adjacent to the vertical linear slide 21, and a second vertical linear slide rail 23 opposite to the first vertical linear slide rail 22. The vertical linear slide 21 includes a track 211 perpendicular to the upper surface 11 of the base 10, a slider 212 slidably mounted on the track 211, and a transmission mechanism (not shown) connecting the slider 212 and the servo motor 70 to raise or lower the slider 212 to a designated position. The track 211 of the vertical linear slide 21, the track 221 of the first vertical linear slide rail 22, and the track 231 of the second vertical linear slide rail 23 are parallel to each other, and the slider 222 of the first vertical linear slide rail 22 and the slider 232 of the second vertical linear slide rail 23 are respectively fixed to the left and right sides of the translation assembly 30. The translation component 30 is connected to the sliders 212, 222, and 232. Therefore, when the servo motor 70 drives the slider 212 to move up and down, it will cause the translation component 30 to rise or fall smoothly.
[0032] Please see Figure 1 , Figures 5 to 7The translation component 30 includes a servo motor 80, a horizontal linear slide 31 connected to the servo motor 80, a first horizontal linear slide rail 32, a second horizontal linear slide rail 33, and a vertical lifting platform 35. The vertical lifting platform 35 is connected to the sliders 212, 222, and 232. The horizontal linear slide 31, the first horizontal linear slide rail 32, and the second horizontal linear slide rail 33 are all fixed on the vertical lifting platform 35, and the first horizontal linear slide rail 32 and the second horizontal linear slide rail 33 are respectively disposed on the left and right sides of the horizontal linear slide 31. The horizontal linear slide 31 includes a track 311, which is parallel to the upper surface 11 of the base 10 and extends from the rear side to the front side of the base 10. A slider 312 is slidably disposed on the track 311, and a transmission mechanism (not shown) connecting the slider 312 and the servo motor 80 to move the slide plate 40 forward or backward to a designated position. The first horizontal linear slide rail 32 and the second horizontal linear slide rail 33 are arranged symmetrically from left to right, and the track 311 of the horizontal linear slide table 31, the track 321 of the first horizontal linear slide rail 32 and the track 331 of the second horizontal linear slide rail 33 are arranged in parallel. The first horizontal linear slide rail 32 and the second horizontal linear slide rail 33 are respectively provided with a support member 324 and 334. The support members 324 and 334 are cuboids. The tops of the support members 324 and 334 are fixed to the left and right opposite positions of the bottom surface of the slide plate 40. The front side of the bottom of the support member 324 is fixed to the front slider 322 of the first horizontal linear slide rail 32, and the rear side of the bottom of the support member 324 is fixed to the rear slider 323 of the first horizontal linear slide rail 32. The front side of the bottom of the support member 334 is fixed to the front slider 332 of the second horizontal linear slide rail 33, and the rear side of the bottom of the support member 334 is fixed to the rear slider 333 of the second horizontal linear slide rail 33, so as to assist the horizontal linear slide table 31 in moving the slide plate 40 back and forth, so that the slide plate 40 can move forward or backward smoothly.
[0033] In this embodiment, the vertical lifting platform 35 has two opposing side walls 351 and further includes two guide wheel assemblies 34 respectively fixed to the side walls 351. The guide wheel assemblies 34 are arranged symmetrically from left to right and are located at the front end of the horizontal linear slide 31. The guide wheel assemblies 34 have a wheel seat 341 protruding upward from the side wall 351, a shaft portion 342 extending inward from the top of the wheel seat 341, and a guide wheel 343 disposed at the end of the shaft portion 342. The guide wheel 343 is suspended and is located above the front end of the track 321 and the front end of the track 331 respectively. The top of the guide wheel 343 abuts against the front side of the bottom surface of the pallet 40 to guide the pallet 40 to move forward or backward, so that the pallet 40 moves smoothly.
[0034] Please see Figures 6 to 9 The pallet 40 is flat and extends from the rear to the front of the base 10. The pallet 40 has a bearing area 41 at its front end, two limiting corner posts 42 adjacent to the bearing area 41, and two guide rails 43 embedded on the left and right sides of the bottom surface of the pallet 40. The bearing area 41 can hold the tray 60 and is located at the front end of the top surface of the pallet 40, with the forward and backward extension distance of the bearing area 41 approximately equal to the length of the tray 60. The limiting corner posts 42 are arranged symmetrically from left to right, and the upward extension distance of the limiting corner posts 42 is approximately equal to the height of the stacked trays 60, thus restricting the backward movement of the trays 60. The guide rail 43 extends from the rear side of the bottom surface of the pallet 40 to the front side. The guide rail 43 is symmetrically arranged from left to right and is parallel to the tracks 321 and 331, and is located above the tracks 321 and 331 respectively. The front end of the guide rail 43 is placed on the guide wheel 343 to assist the guide wheel 343 in rotating, so that the pallet 40 can move smoothly.
[0035] Please see Figure 1 , Figures 10 to 13The limiting component 50 includes an actuating motor 90 disposed within the base 10, an actuating gear 51 disposed within the base 10, two actuating racks 52 slidably disposed within the base 10, and two movable clamping arms 53 pivotally connected to the front end of the base 10. The actuating gear 51 is connected to the actuating motor 90, the actuating racks 52 are arranged in parallel, and the actuating racks 52 respectively mesh with the upper and lower sides of the actuating gear 51, so that the two actuating racks 52 move towards each other when the actuating motor 90 rotates. The movable clamping arms 53 each include an actuating end 531 extending into the interior of the base 10 and a clamping end 532 extending upward toward the base 10. The actuating ends 531 are pivotally connected to the actuating rack 52, so that the clamping ends 532 of the two movable clamping arms 53 clamp or release towards the tray 40 when the actuating motor 90 rotates. The clamping ends 532 are perpendicular to the upper surface 11 and are arranged symmetrically from left to right. The tops of the clamping ends 532 are located on the left and right sides of the bearing area 41 and are flush with the top of the material tray 60. Each clamping end 532 includes a clamping plate 5321 disposed on the clamping end 532 and a stop bar 5322 disposed on the front edge of the clamping plate 5321. The clamping plates 5321 are opposite each other and perpendicular to the upper surface 11. The clamping plates 5321 are flat, and their top edges are flush with the top of the clamping end 532. The clamping plates 5321 extend downwards by a distance approximately equal to the height of the stacked trays 60, and extend forward and backward by a distance approximately equal to the length of the trays 60, so as to completely cover the left and right sides of the trays 60. This allows the clamping end 532 to completely clamp all the trays 60 when it clamps against the support plate 40. To prevent the trays 60 from tilting forward, the leading edge of the clamping plates 5321 bends inwards and extends to form the baffle 5322. The baffle 5322 is elongated and its length is approximately equal to the height of the stacked trays 60, so that the clamping end 532 can restrict the forward movement of the trays 60 when it clamps them.
[0036] Please see Figure 2 and Figure 3 To prevent the translation component 30 from being obstructed by exposed and scattered wires, the lifting component 20 further includes a wire-concealing chain 24 disposed adjacent to the second horizontal linear slide rail 23. The wire-concealing chain 24 is hollow and extends upward, then bends to the right and extends downward. The left end of the wire-concealing chain 24 is fixed to the right side of the translation component 30, and the right end of the wire-concealing chain 24 is fixed to the rear side of the second horizontal linear slide rail 23, so as to gather the wires in the wire-concealing chain 24.
[0037] Please see Figure 1, Figure 10 and Figure 14 In this embodiment, the operation process of the material tray loading and unloading device 100 of this utility model is as follows: When the unmanned transport vehicle 200 stops at a processing station (not shown) where a loading operation is to be carried out, the material tray 60, which is held by the limiting component 50, is placed in the bearing area 41. The movable clamping arms 53 of the limiting component 50 release each other and release the material tray 60. Then, the lifting component 20 lifts the translation component 30 along with the pallet 40 until the pallet 40 is raised to the position where the loading operation is to be carried out. After the robotic arm (not shown) of the unmanned transport vehicle 200 reaches the same height, the translation component 30 extends the pallet 40 forward until the tray 60 is above the platform (not shown). The lifting component 20 lowers the translation component 30 along with the pallet 40 to place the tray 60 on the platform. Then, the translation component 30 moves the pallet 40 backward, and the lifting component 20 lowers the translation component 30 along with the pallet 40, returning the pallet 40 to its initial position.
[0038] When the unmanned transport vehicle 200 stops at a processing station where material unloading is to be performed, the operation process of the material tray loading and unloading device 100 of this utility model is as follows: the bearing area 41 is empty, the movable clamping arm 53 of the limiting component 50 is in a released state, the lifting component 20 lifts the translation component 30 along with the pallet 40 until the pallet 40 is raised to the same height as the platform, the translation component 30 extends the pallet 40 forward until the pallet 40 is inserted into the bottom of the material tray 60, and the material tray 60... The tray 60 is held in place by the limiting corner post 42, the pallet 40 lifts the tray 60, and the tray 60 is placed in the bearing area 41. Then the translation component 30 moves the pallet 40 backward, and the lifting component 20 lowers the pallet 40 along with the translation component 30. The pallet 40 returns to the initial position, and at the same time, the tray 60 is located between the movable clamping arms 53 of the limiting component 50. The movable clamping arms 53 clamp to hold and fix the tray 60 on the bearing area 41.
[0039] In summary, the tray handling device 100 of this utility model is equipped with a movable clamping arm 53 driven by the actuation motor 90, so that the tray 60 is clamped and fixed on the bearing area 41 of the pallet 40 when the unmanned transport vehicle 200 is moving, preventing the tray 60 from tipping over or being impacted. Furthermore, the tray handling device 100 of this utility model is equipped with a vertical linear slide 21 and a horizontal linear slide 31 driven by the servo motors 70 and 80 respectively, and is arranged adjacent to the vertical linear slide 21. The first vertical linear slide rail 22, the second vertical linear slide rail 23 disposed on the opposite side of the vertical linear slide table 21, and the first horizontal linear slide rail 32 and the second horizontal linear slide rail 33 disposed parallel to the left and right sides of the horizontal linear slide table 31, enable the pallet 40 to cooperate with the scheduling of the unmanned transport vehicle 200 to place the tray 60 on the platform or remove the tray 60 from the platform, assisting the unmanned transport vehicle 200 in loading and unloading operations at each processing station, thereby reducing labor costs.
[0040] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.
Claims
1. A tray handling device, mounted on an unmanned transport vehicle, characterized in that: The device comprises: a base, mounted on an unmanned transport vehicle; two vertical linear slide rails located at the rear end of the base and extending upwards perpendicular to the upper surface of the base; a vertical linear slide table parallel to the vertical linear slide rails and extending upwards from the upper surface of the base; a vertical lifting platform connected to both the vertical linear slide rails and the vertical linear slide table for vertical lifting under the drive of the vertical linear slide table; two horizontal linear slide rails fixed to the vertical lifting platform and extending parallel to the upper surface of the base; a horizontal linear slide table parallel to the horizontal linear slide rails and fixed to the vertical lifting platform; and a pallet connected to both the horizontal linear slide rails and the horizontal linear slide table for sliding back and forth under the drive of the horizontal linear slide table, wherein the front end of the pallet has a support area for placing a material tray. An actuating motor is provided, wherein the actuating motor is disposed on the base; An actuating gear is provided, which is connected to the actuating motor; two actuating racks are slidably disposed on the base and respectively mesh with the two sides of the actuating gear, so that the two actuating racks move towards each other when the actuating motor rotates; and two movable clamping arms are pivotally connected to the front end of the base and include an actuating end and a clamping end; wherein the actuating ends of the two movable clamping arms are respectively connected to the two actuating racks, and the clamping ends are located on two opposite sides of the tray, so that when the actuating motor rotates, the clamping ends of the two movable clamping arms clamp or release towards the tray.
2. The tray handling device as described in claim 1, characterized in that: The two vertical linear slide rails include a first vertical linear slide rail and a second vertical linear slide rail. The vertical linear slide table is arranged adjacent to the first vertical linear slide rail, and the first vertical linear slide rail and the second vertical linear slide rail are arranged opposite each other. The track of the vertical linear slide table is perpendicular to the upper surface. The tracks of the vertical linear slide table, the first vertical linear slide rail, and the second vertical linear slide rail are arranged in parallel. The sliders of the first vertical linear slide rail and the second vertical linear slide rail are respectively fixed to the left and right sides of the vertical lifting platform. The vertical lifting platform is connected to the sliders of the vertical linear slide table, the first vertical linear slide rail, and the second vertical linear slide rail.
3. The tray handling device as described in claim 2, characterized in that: A wire-concealing chain is provided on one side of the horizontal linear slide rail. The wire-concealing chain is hollow and extends upward, then bends to the right and extends downward. The left end of the wire-concealing chain is fixed to the right side of the vertical lifting platform, and the right end of the wire-concealing chain is fixed to the rear side of the horizontal linear slide rail.
4. The material tray handling device as described in claim 1, characterized in that: The two horizontal linear slide rails include a first horizontal linear slide rail and a second horizontal linear slide rail. The first horizontal linear slide rail is disposed on the left side of the horizontal linear slide table, and the second horizontal linear slide rail is disposed on the right side of the horizontal linear slide table. The first horizontal linear slide rail and the second horizontal linear slide rail are arranged symmetrically from left to right. The track of the horizontal linear slide table is parallel to the upper surface and extends from the rear side of the base to the front side. The track of the horizontal linear slide table, the track of the first horizontal linear slide rail, and the track of the second horizontal linear slide rail are arranged in parallel.
5. The tray handling device as described in claim 4, characterized in that: The first horizontal linear slide rail and the second horizontal linear slide rail are each provided with a support member. The support member is cuboid in shape. The top of the support member is fixed to a position opposite to the left and right sides of the bottom surface of a slide plate. The front side of the bottom of the support member of the first horizontal linear slide rail is fixed to the front slider of the first horizontal linear slide rail, and the rear side of the bottom of the support member of the first horizontal linear slide rail is fixed to the rear slider of the first horizontal linear slide rail. The front side of the bottom of the support member of the second horizontal linear slide rail is fixed to the front slider of the second horizontal linear slide rail, and the rear side of the bottom of the support member of the second horizontal linear slide rail is fixed to the rear slider of the second horizontal linear slide rail.
6. The tray handling device as described in claim 4, characterized in that: The vertical lifting platform has two opposing side walls, and two guide wheel sets are respectively fixed to the side walls. The guide wheel sets are located at the front end of the vertical lifting platform, and each guide wheel set has a wheel seat protruding from the side wall, a shaft extending inward from the top of the wheel seat, and a guide wheel disposed at the end of the shaft. The guide wheels are respectively located above the front end of the first horizontal linear slide rail and above the front end of the second horizontal linear slide rail, and the top of the guide wheels abuts against the front side of the bottom surface of the pallet.
7. The tray handling device as described in claim 6, characterized in that: The pallet is provided with two guide rails located on the left and right sides of the bottom surface of the pallet. The guide rails extend from the rear side to the front side of the bottom surface of the pallet. The guide rails are arranged symmetrically from left to right and are parallel to the tracks of the first horizontal linear slide rail and the second horizontal linear slide rail. The front end of the guide rail is placed on the guide wheel.
8. The tray handling device as described in claim 1, characterized in that: The distance the bearing area extends forward and backward is approximately equal to the length of the material tray, and the pallet is provided with two limiting corner posts that are adjacent to the bearing area. The limiting corner posts are located at the rear edge of the bearing area and are arranged symmetrically from left to right. The distance the limiting corner posts extend upward is approximately equal to the height of the stacked material trays.
9. The material tray handling device as described in claim 1, characterized in that: The clamping end is provided with a clamping plate, which is perpendicular to the upper surface. The clamping plate is flat, and its top edge is flush with the top of the clamping end. The clamping plate extends downwards by a distance approximately equal to the height of the stacked material trays.
10. The tray handling device as described in claim 9, characterized in that: The clamping end is provided with a stop bar, which is formed by bending inward and extending from the front edge of the clamping plate, and the vertical extension distance of the stop bar is approximately equal to the height of the stacked material trays.