Automatic tray feeding and discharging mechanism

Abstract

The utility model discloses a kind of material tray automatic in-out mechanism, including mainframe, the top surface of the top plate of mainframe is fixed with front and rear extension conveying linear module at the right side of top surface, the top surface of the moving block of conveying linear module is fixed with material tray placing plate, the top surface of material tray placing plate is shaped with the protruding positioning portion extending upwards in four corners, material tray is placed on the top surface of material tray placing plate and between the protruding positioning portion of front and rear portion, left and right of material tray protrude left side and right side of material tray placing plate;The top surface of the top plate of mainframe is fixed with left and right extension feeding linear module at the right side of rear portion of conveying linear module;It can automatically feed material tray, to realize automatic receiving material, and can be stacked after full material tray is placed, automatically discharge, greatly improve the placing effect and efficiency, simultaneously, unqualified product can be rejected and placed on waste tray, to facilitate centralized processing.

Description

Technical Field

[0001] This utility model relates to the field of integrated circuit component testing equipment technology, and more specifically to an automatic tray feeding and unloading mechanism. Background Technology

[0002] After the existing integrated circuit components (IC chips) are processed, they need to be inspected on all sides. After being inspected by automatic inspection equipment, the inspected integrated circuit components need to be placed on the corresponding material trays to facilitate subsequent packaging and other operations. The integrated circuit components detected by the testing facility include qualified and unqualified products, which need to be distinguished. Qualified products are placed on the material tray, while unqualified products are removed. However, there are currently no automatically rejected components, and the loading and unloading of the material tray is also done manually, which is inefficient and ineffective. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an automatic material tray feeding and discharging mechanism. It can automatically feed material trays to achieve automatic material receiving, and can stack full material trays to automatically discharge material, greatly improving the placement effect and efficiency. At the same time, it can remove defective products and place them on a waste tray for convenient centralized processing.

[0004] The solution of this utility model to the aforementioned technical problem is: An automatic tray feeding and discharging mechanism includes a main frame. A conveying linear module extending forward and backward is fixed on the top surface of the top plate of the main frame at the right side. A tray placement plate is fixed on the top surface of the moving block of the conveying linear module. Each of the four corners of the top surface of the tray placement plate has an upwardly extending protruding positioning part. The tray is placed on the top surface of the tray placement plate and is located between the front and rear protruding positioning parts. The left and right parts of the tray extend out of the left and right sides of the tray placement plate. A left-right extending feed linear module is fixed on the top surface of the top plate of the main frame at the rear right side of the conveying linear module, and a left-right extending discharge linear module is fixed on the top surface of the top plate of the main frame at the front right side of the conveying linear module. A left-right extending discharge plate is fixed on the top surface of the moving block of both the feed linear module and the discharge linear module, and a front-back extending limit stop is fixed in the middle of the top surface of the discharge plate. A lower support frame is fixed to the bottom surface of the top plate of the main frame directly below the end of the conveying straight module corresponding to the left end of the feeding straight module and the discharging straight module. An electric cylinder is fixed to the middle of the bottom surface of the bottom plate of the lower support frame. The top end of the push rod of the electric cylinder extends out of the top surface of the bottom plate of the lower support frame and is fixed to a lifting plate. Vertical guide rods are fixed at the four corners of the top surface of the lifting plate. The vertical guide rods are inserted into the guide sleeves fixed on the inner side wall of the corresponding through holes formed on the top plate of the main frame. The top ends of the two corresponding vertical guide rods on the right are fixed to the same right lifting plate, and the top ends of the two corresponding vertical guide rods on the left are fixed to the same left lifting plate. The front and rear top surfaces of the left and right lifting plates are formed with upwardly extending support rods. The top surfaces of the left and right support rods on the opposite side are formed with protruding limiting parts. The support rods of the left and right lifting plates support the material trays conveyed on the feeding linear module and the discharging linear module.

[0005] The left ends of the feeding linear module and the discharging linear module are each fixed with two vertical support legs on the left side of the conveying linear module. The tops of the two corresponding vertical support legs are fixed with side baffles on opposite sides. The left end of the feeding plate corresponds to the material tray placement cavity formed between the two corresponding side baffles.

[0006] Positioning and fixing columns are fixed at the front and rear of the left and right sides of the conveying linear module at the left end of the feeding linear module. Positioning cylinders are fixed at the top of the positioning and fixing columns. Vertical push plates are fixed at the end of the push rods of the positioning cylinders. Limiting support plates are fixed on the top surfaces of the opposite walls of the vertical push plates on the left and right sides. The limiting support plates correspond to the grooves at the corresponding positions on the left or right sides of the bottom surface of the material tray. The top of the vertical push plate is formed with a bent part, and a slider is fixed on the bottom surface of the bent part. The top surface of the corresponding positioning cylinder is fixed with a large guide rail sleeve in the groove formed in the middle of the bottom surface of the corresponding slider and cooperates with it.

[0007] Positioning and fixing columns are fixed at the front and rear of the left and right sides of the conveying linear module at the left end of the discharge linear module. A connecting seat is fixed at the top of each positioning and fixing column. A supporting rotating block is movably connected to the connecting seat through a hinge shaft. The upper right side wall of the supporting rotating block of the left connecting seat has a protrusion extending to the right, and the bottom surface of the protrusion is an inclined wall. The upper left side wall of the supporting rotating block of the right connecting seat has a protrusion extending to the left, and the bottom surface of the protrusion is an inclined wall. The top surfaces of the four protrusions face the bottom surface of the tray between the two corresponding side baffles.

[0008] A connecting block is fixed on the side wall at the top of the two vertical support legs corresponding to the discharge linear module. A photoelectric proximity sensor is fixed on the connecting block, which senses the left side wall of the material tray on the right.

[0009] A second linear module extending forward and backward is fixed on the top surface of the top plate of the main frame at the right side corresponding to the middle of the conveying linear module. A second transverse linear module extending left and right is fixed on the top surface of the moving plate of the second linear module. A waste material receiving plate is fixed on the top surface of the moving plate of the second transverse linear module. Baffle plates are fixed on the front, rear and left sides of the top surface of the waste material receiving plate. The waste material tray is placed on the top surface of the waste material receiving plate, and its left side wall, front side wall and rear side wall are close to or in close contact with the inner wall surface of the corresponding baffle plate. A pressure cylinder with a guide rod is fixed in the middle of the top surface of the right side of the waste material receiving plate. The pressure plate fixed on the push rod of the pressure cylinder presses against the right side wall of the waste material receiving plate.

[0010] The outstanding effect of this utility model is: Compared with existing technologies, it can automatically feed materials into the trays to achieve automatic material receiving, and can automatically discharge materials after stacking full trays, greatly improving the placement effect and efficiency. At the same time, it can remove defective products and place them on the waste tray for convenient centralized processing. Attached Figure Description

[0011] Figure 1 This is a partial structural diagram of the present invention installed in the entire device; Figure 2 yes Figure 1 A magnified view of a portion of the image; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a partial structural diagram of the angle-changing part of this utility model; Figure 5 yes Figure 4 A magnified view of a portion of the image; Figure 6 yes Figure 4 A magnified view of another part; Figure 7 This is a schematic diagram of another partial structure of this utility model with a different angle; Figure 8 This is another schematic diagram of a partial structure of the present invention with a different angle; Figure 9 This is a partial side view of the present invention; Figure 10 This is a partial structural diagram of the connector. Figure 11 This is a partial sectional view of the connector. Detailed Implementation

[0012] For example, see below. Figures 1 to 11 As shown, an automatic tray feeding and discharging mechanism includes a main frame 10. A conveying linear module 200 extending forward and backward is fixed on the top surface of the top plate of the main frame 10 at the right side. A tray placement plate 201 is fixed on the top surface of the moving block of the conveying linear module 200. The four corners of the top surface of the tray placement plate 201 are formed with upwardly extending protruding positioning parts 202. The tray 1000 is placed on the top surface of the tray placement plate 201 and is located between the front and rear protruding positioning parts 202. The left and right parts of the tray 1000 extend out of the left and right sides of the tray placement plate 201. Among them, the conveying equipment and feeding mechanism of the pre-detection integrated circuit component 100 are installed on the top plate of the main frame 10 on the left side of the conveying linear module 200. This structure can adopt a conventional structure, which will not be described in detail here. Furthermore, a left-right extending feed linear module 210 is fixed on the top surface of the top plate of the main frame 10 at the rear right side of the conveying linear module 200, and a left-right extending discharge linear module 220 is fixed on the top surface of the top plate of the main frame 10 at the front right side of the conveying linear module 200. The top surfaces of the moving blocks of the feed linear module 210 and the discharge linear module 220 are both fixed with left-right extending discharge plates 211, and the top surface of the discharge plates 211 is fixed with front-back extending limit bars 212 in the middle of the top surface. A lower support frame 203 is fixed to the bottom surface of the top plate of the main frame 10 directly below the end of the conveying linear module 200 corresponding to the left end of the feeding linear module 210 and the discharging linear module 220. An electric cylinder 204 (which is a servo electric cylinder) is fixed to the middle of the bottom surface of the bottom plate of the lower support frame 203. The top end of the push rod of the electric cylinder 204 extends out of the top surface of the bottom plate of the lower support frame 203 and is fixed to a lifting plate 205. Vertical guide rods 206 are fixed at the four corners of the top surface of the lifting plate 205. The guide sleeve is fixed on the inner wall of the corresponding through hole formed on the top plate of the main frame 10. The top ends of the two corresponding vertical guide rods 206 on the right are fixed to the same right lifting plate 208, and the top ends of the two corresponding vertical guide rods 206 on the left are fixed to the same left lifting plate 207. The front and rear top surfaces of the left lifting plate 207 and the right lifting plate 208 are both formed with upwardly extending support rods 209. The top surfaces of the support rods 209 on the left and right sides that are far apart are both formed with protruding limiting parts 2091. The support rods 209 of the left lifting plate 207 and the right lifting plate 208 support the material trays 1000 conveyed on the feeding linear module 210 and the discharging linear module 220.

[0013] Furthermore, the left ends of the feeding linear module 210 and the discharging linear module 220 are each fixed with two vertical support legs on the left side of the conveying linear module 200. The tops of the two corresponding vertical support legs are fixed with side baffles 230 on opposite sides. The left end of the feeding plate 211 corresponds to the material tray placement cavity formed between the two corresponding side baffles 230.

[0014] Furthermore, the left end of the feeding linear module 210 and the left and right sides of the conveying linear module 200 are both fixed with positioning and fixing columns at the front and rear. The top of each positioning and fixing column is fixed with a positioning cylinder 212. The end of the push rod of the positioning cylinder 212 is fixed with a vertical push plate. The top surface of the opposite wall of the vertical push plate on the left and right sides is fixed with a limit support plate 213. The limit support plate 213 corresponds to the groove at the corresponding position on the left or right side of the bottom surface of the material tray 1000. The top of the vertical push plate is formed with a bent part, and a slider is fixed on the bottom surface of the bent part. The top surface of the corresponding positioning cylinder 212 is fixed with a large guide rail sleeve in the groove formed in the middle of the bottom surface of the corresponding slider and cooperates with it.

[0015] Furthermore, at the left end of the discharge linear module 220, the front and rear parts of the left and right sides of the conveying linear module 200 are fixed with positioning and fixing posts. A connecting seat 221 is fixed to the top of each positioning and fixing post. A supporting rotating block 222 is movably connected to the connecting seat 221 via a hinge shaft. The upper right side wall of the supporting rotating block 222 of the left connecting seat 221 has a protrusion extending to the right, with the bottom surface of the protrusion being an inclined wall surface. The upper left side wall of the supporting rotating block 222 of the right connecting seat 221 has a protrusion extending to the left. The protruding part has a sloping bottom surface. Each supporting rotating block 222 has a concave hole formed in the middle of the wall surface on one side of the corresponding connecting seat 221. A guide sleeve is fixed on the wall surface on one side of the corresponding connecting seat 221. The return spring is inserted into the guide sleeve. The end of the limiting rod is inserted into the corresponding concave hole. One end of the return spring is applied to the inner end face of the concave hole, and the other end is applied to the wall surface on one side of the connecting seat 221. The inner wall surface of the bottom of the supporting rotating block 222 is pressed against the corresponding wall surface of the connecting seat 221.

[0016] The top surfaces of the four protrusions face the bottom surfaces of the tray 1000 between the two corresponding side baffles 230.

[0017] Furthermore, a connecting block is fixed on the side wall at the top of the two vertical support legs corresponding to the discharge linear module 220, and a photoelectric proximity sensor 224 is fixed on the connecting block, which senses the left side wall of the material tray 1000 on the right.

[0018] Furthermore, slotted photoelectric switches 225 are fixed on the front and rear side walls of the conveying linear module 200, and sensing plates are fixed on the front and rear of the moving block of the conveying linear module 200, which correspond to the slotted photoelectric switches 225.

[0019] Furthermore, a second proximity switch 219 is fixed on the connecting and fixing part on the front side of the vertical support leg at the left side of the left end of the feeding linear module 210. The sensing end of the second proximity switch 219 senses the front part of the right side wall of the material tray 1000 placed on the material tray placement plate 201.

[0020] Furthermore, a second linear module 240 extending forward and backward is fixed on the top surface of the top plate of the main frame 10 at the right side corresponding to the middle of the conveying linear module 200. A second transverse linear module 250 extending left and right is fixed on the top surface of the moving plate of the second linear module 240. A waste tray receiving plate 251 is fixed on the top surface of the moving plate of the second transverse linear module 250. Baffles are fixed on the front, rear and left sides of the top surface of the waste tray receiving plate 251. The waste tray 260 is placed on the top surface of the waste tray receiving plate 251, and its left side wall, front side wall and rear side wall are close to or in close contact with the inner wall surface of the corresponding baffle. A pressure cylinder 252 with a guide rod is fixed in the middle of the top surface of the right side of the waste tray receiving plate 251. The pressure plate fixed on the push rod of the pressure cylinder 252 presses against the right side wall of the waste tray 260 placed on the waste tray receiving plate 251.

[0021] Furthermore, a mounting through hole is formed on the bottom surface of one side of the waste tray receiving plate 251. The material discharge sensing proximity switch 254 is located in the mounting through hole and fixed on the waste tray receiving plate 251. The waste plate 260 placed on the waste tray receiving plate 251 is located above the top surface of the material discharge sensing proximity switch 254 and is sensed by the material discharge sensing proximity switch 254.

[0022] In this embodiment, all cylinders are connected to the corresponding control valves of the pneumatic system via connecting pipes. The pneumatic system and all other electrical components are electrically connected to the control host via electrical connection lines. The operation is controlled by the control host. This is a conventional structure and will not be described in detail here.

[0023] In this embodiment, the stacked trays 1000 are first manually placed onto the top left side of the feeding plate 211 of the feeding linear module 210. The feeding linear module 210 then moves the feeding plate 211 to the left, causing all trays 1000 to move between the two side baffles 230 at the rear, with their left side wall resting against the right side wall of the corresponding two vertical support legs. Slotted photoelectric switches 225 are fixed to the left and right sides of the side walls of both the feeding linear module 210 and the discharging linear module 220. Each movable block has a sensor fixed to its bottom edge. These sensors are inserted into the slots of the slotted photoelectric switch 225 on the left side. When the sensor is detected by the switch, it indicates that the block has been pushed into position. Simultaneously, the control unit controls the push rod of the electric cylinder 204 at the rear, causing the four corresponding support rods 209 to rise. This presses the left and right bottom surfaces of the bottommost material tray 1000 against the tops of the four support rods 209, placing it between the protruding limiting parts 2091 on the left and right sides, thus achieving a limiting position. At the same time, all material trays 1000 are... The material tray 1000 is raised a certain distance (this raising distance is set by the program in the control host, and will not be detailed here), causing the bottom tray 1000 to detach from the feeding plate 211. Then, the moving block of the feeding linear module 210 moves to the right to return to its original position, causing the feeding plate 211 to return to its original position. At the same time, the moving block of the conveying linear module 200 moves backward until the sensing plate is detected by the corresponding slotted photoelectric switch 225, indicating that it has moved into position. At this time, the control host controls the push rod of the corresponding electric cylinder 204 to return to its original position, causing the bottom tray 1000 to detach from the feeding plate 211. The material tray 1000 is placed on the top surface of the material tray placement plate 201 and between the front and rear protruding positioning parts 202. At this time, the second proximity switch 219 senses the bottom material tray 1000, indicating that the material has been picked up. Then, the push rods of the four rear positioning cylinders 212 push, so that the end of the limit support plate 213 is inserted into the corresponding groove on the left or right side of the bottom surface of the second to last material tray 1000, thereby achieving support for all material trays 1000 except the bottom material tray 1000. Then, the moving block of the conveying linear module 200 moves forward to the middle. A slotted photoelectric switch 225 can be installed on the middle side wall of the conveying linear module 200. When the sensing element is inserted into the slot of this slotted photoelectric switch 225 and is sensed, it indicates that the module has moved into position. Alternatively, the moving position can be controlled by controlling the distance the moving block of the conveying linear module 200 moves. In this embodiment, the module is moved into position by controlling the distance the moving block of the conveying linear module 200 moves. Then, the gripping mechanism installed on the top plate of the main frame 10 grips and places the integrated circuit component on the synchronous belt conveyor on the left side of the conveying linear module 200 into position. In the placement slot of the material tray 1000 here (the gripping mechanism and the synchronous belt conveyor are existing conventional structures, which will not be described in detail here), when the material tray 1000 is dispensing material, after the empty space at the front is placed, the moving block of the conveying linear module 200 moves forward one position, so that the middle of the material tray 1000 can continue to be dispensing material until the material is dispensing material. Then, the moving block of the conveying linear module 200 moves forward so that it reaches the area below the two side baffles 230 at the front. At this time, the sensing plate at the front of the moving block is sensed in the slot of the corresponding slot-shaped photoelectric switch 225 at the front, indicating that it has moved into place. At this time, the push rod of the corresponding electric cylinder 204 at the front pushes, and the four corresponding support rods 209 are lifted, raising the material tray 1000. When it is lifted, it flips the corresponding support rotating block 222 upward, so that the material tray 1000 passes through the support rotating block 222. Then, the return spring makes the support rotating block 222 return to its original position. Then, the push rod of the electric cylinder 204 returns to its original position. At this time, the material tray 1000 will be placed on the top surface of the protrusion of the four support rotating blocks 222, and the material tray 1000 is between the two corresponding side baffles 230, with its left side close to the two corresponding vertical support legs. Then, the moving block of the conveyor linear module 200 moves backward to pick up the subsequent material tray 1000 for receiving. The material is then placed and transported between the two front side baffles 230, and then lifted. At this point, the new material tray 1000 is at the bottom, and the previous material tray 1000 is above it, achieving stacking. When the two photoelectric proximity sensors 224 detect the material tray 1000, it indicates that the front material tray 1000 is full. The corresponding electric cylinder 204 can then push the push rod to lift the material tray 1000, and then the material is discharged linearly. The moving block of module 220 moves to the left until the sensing part at the bottom of the moving block is sensed by the slotted photoelectric switch 225 at the left side of the discharge linear module 220, indicating that it has moved into position. At this time, the feeding plate 211 is below the bottommost material tray 1000. By retracting the push rod of the electric cylinder 204, all the stacked material trays 1000 are placed on the feeding plate 211. The moving block of the discharge linear module 220 moves to the right to realize the discharge. The sensing part at the bottom of the moving block is sensed by the slotted photoelectric switch 225 at the right side, indicating that it has moved into position.

[0024] This embodiment can automatically load and unload material from tray 1000, with good operation and a high degree of automation.

[0025] Meanwhile, during the inspection, defective products will also be generated. At this time, through the coordinated operation of the second linear module 240 and the second transverse linear module 250, the waste tray 260 is moved to the middle and above the conveying linear module 200, where the defective integrated circuit components 100 grabbed by the gripping mechanism can be received. After receiving, the moving block of the second transverse linear module 250 moves to the right, so that the waste tray 260 moves back to the right and can then be placed normally.

[0026] The waste receiving plate 251 has a pressure cylinder 252 with a guide rod fixed in the middle of the top surface of the right side. The pressure plate fixed on the push rod of the pressure cylinder 252 presses against the right side wall of the waste receiving plate 260 placed on the waste receiving plate 251, limiting the waste receiving plate 251 to prevent it from moving. The material discharge sensing proximity switch 254 can sense whether the waste receiving plate 260 is placed on the waste receiving plate 251.

[0027] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model, and the patent protection scope of the present utility model should be defined by the claims.

Claims

1. An automatic tray feeding and discharging mechanism, comprising a main frame (10), characterized in that: The top surface of the top plate of the main frame (10) is fixed with a front-to-back extending conveying linear module (200) at the right side of the top surface. The top surface of the moving block of the conveying linear module (200) is fixed with a material tray placement plate (201). The four corners of the top surface of the material tray placement plate (201) are formed with upward extending protruding positioning parts (202). The material tray (1000) is placed on the top surface of the material tray placement plate (201) and is located between the front and rear protruding positioning parts (202). The left and right parts of the material tray (1000) extend out of the left and right sides of the material tray placement plate (201). A left-right extending feed linear module (210) is fixed on the top surface of the top plate of the main frame (10) at the rear right side of the conveying linear module (200), and a left-right extending discharge linear module (220) is fixed on the top surface of the top plate of the main frame (10) at the front right side of the conveying linear module (200). A left-right extending discharge plate (211) is fixed on the top surface of the moving block of both the feed linear module (210) and the discharge linear module (220). A front-back extending limit stop (212) is fixed in the middle of the top surface of the discharge plate (211). A lower support frame (203) is fixed to the bottom surface of the top plate of the main frame (10) directly below the end of the conveying straight module (200) corresponding to the left end of the feeding straight module (210) and the discharging straight module (220). An electric cylinder (204) is fixed to the middle of the bottom surface of the bottom plate of the lower support frame (203). The top end of the push rod of the electric cylinder (204) extends out of the top surface of the bottom plate of the lower support frame (203) and is fixed with a lifting plate (205). Vertical guide rods (206) are fixed at the four corners of the top surface of the lifting plate (205). The vertical guide rods (206) are inserted into the... In the guide sleeve fixed on the inner wall of the corresponding through hole formed on the top plate of the main frame (10), the top ends of the two corresponding vertical guide rods (206) on the right are fixed with the same right lifting plate (208), and the top ends of the two corresponding vertical guide rods (206) on the left are fixed with the same left lifting plate (207). The front and rear top surfaces of the left lifting plate (207) and the right lifting plate (208) are both formed with upwardly extending support rods (209), and the top surfaces of the support rods (209) on the left and right sides that are far apart are both formed with protruding limiting parts (2091). The support rods (209) of the left lifting plate (207) and the right lifting plate (208) support the material trays (1000) conveyed on the feeding linear module (210) and the discharging linear module (220).

2. The automatic tray feeding and discharging mechanism according to claim 1, characterized in that: The left ends of the feeding linear module (210) and the discharging linear module (220) are each fixed with two vertical support legs on the left side of the conveying linear module (200). The tops of the two vertical support legs are fixed with side baffles (230) on opposite sides. The material tray placement cavity formed between the left end of the feeding plate (211) and the corresponding two side baffles (230) corresponds to the material tray placement cavity formed between them.

3. The automatic tray feeding and discharging mechanism according to claim 1, characterized in that: The left end of the feeding linear module (210) has a positioning and fixing column fixed at the front and rear of the left and right sides of the conveying linear module (200). The top of the positioning and fixing column is fixed with a positioning cylinder (2120). The end of the push rod of the positioning cylinder (2120) is fixed with a vertical push plate. The top surface of the opposite wall of the vertical push plate on the left and right sides is fixed with a limit support plate (213). The limit support plate (213) corresponds to the groove at the corresponding position on the left or right side of the bottom surface of the material tray (1000). The top of the vertical push plate is formed with a bent part, and the bottom surface of the bent part is fixed with a slider. The top surface of the corresponding positioning cylinder (2120) is fixed with a large guide rail sleeve in the groove formed in the middle of the bottom surface of the corresponding slider and cooperates with it.

4. The automatic tray feeding and discharging mechanism according to claim 1, characterized in that: The left end of the discharge linear module (220) has a front and rear part of the left and right sides of the conveying linear module (200) with a positioning and fixing column. The top of the positioning and fixing column is fixed with a connecting seat (221). The connecting seat (221) is movably connected with a support rotating block (222) through a hinge shaft. The upper right side wall of the support rotating block (222) of the left connecting seat (221) has a protrusion extending to the right, and the bottom surface of the protrusion is an inclined wall surface. The upper left side wall of the support rotating block (222) of the right connecting seat (221) has a protrusion extending to the left, and the bottom surface of the protrusion is an inclined wall surface. The top surfaces of the four protrusions face the bottom surface of the tray (1000) between the two corresponding side baffles (230).

5. The automatic tray feeding and discharging mechanism according to claim 1, characterized in that: A connecting block is fixed on the side wall at the top of the two vertical legs corresponding to the discharge linear module (220), and a photoelectric proximity sensor (224) is fixed on the connecting block, which senses the left side wall of the material tray (1000) on the right.

6. The automatic tray feeding and discharging mechanism according to claim 1, characterized in that: The front and rear side walls of the conveying linear module (200) are each fixed with a slotted photoelectric switch (225), and the front and rear of the moving block of the conveying linear module (200) are each fixed with a sensing plate, which corresponds to the corresponding slotted photoelectric switch (225).

7. The automatic tray feeding and discharging mechanism according to claim 1, characterized in that: A second proximity switch (219) is fixed on the connecting and fixing part on the front side of the vertical support leg at the left end of the feed linear module (210). The sensing end of the second proximity switch (219) senses the front part of the right side wall of the tray (1000) placed on the tray placement plate (201).

8. The automatic tray feeding and discharging mechanism according to claim 1, characterized in that: The top surface of the top plate of the main frame (10) at the right side of the middle of the conveying linear module (200) is fixed with a second linear module (240) extending forward and backward. The top surface of the moving plate of the second linear module (240) is fixed with a second horizontal linear module (250) extending left and right. The top surface of the moving plate of the second horizontal linear module (250) is fixed with a waste tray receiving plate (251). The front, rear and left sides of the top surface of the waste tray receiving plate (251) are all fixed with baffles. The waste tray (260) is placed on the top surface of the waste tray receiving plate (251), and its left side wall, front side wall and rear side wall are close to or in close contact with the inner wall surface of the corresponding baffle. A pressure cylinder (252) with a guide rod is fixed in the middle of the top surface of the right side of the waste tray receiving plate (251). The pressure plate fixed on the push rod of the pressure cylinder (252) presses against the right side wall of the waste tray (260) placed on the waste tray receiving plate (251).

9. The automatic tray feeding and discharging mechanism according to claim 8, characterized in that: A mounting through hole is formed on the bottom surface of one side of the waste tray receiving plate (251). The material discharge sensing proximity switch (254) is located in the mounting through hole and fixed on the waste tray receiving plate (251). The waste tray (260) placed on the waste tray receiving plate (251) is above the top surface of the material discharge sensing proximity switch (254) and is sensed by the material discharge sensing proximity switch (254).

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