Charging tray blocking, limiting and lifting mechanism and charging tray circulating device thereof

Abstract

The utility model discloses a material tray blocking, limiting and lifting mechanism and a material tray circulating device thereof, the material tray blocking, limiting and lifting mechanism comprises a blocking and lifting mechanism and a limiting mechanism, the blocking and lifting mechanism is arranged below a conveying belt of a conveying line and is used for blocking and lifting a material tray which is linearly conveyed on the conveying line; the limiting mechanism is arranged above the blocking and lifting mechanism and used for pressing the material disc on the conveying line from the lower portion. The blocking and lifting mechanism comprises a lifting assembly, a blocking assembly and a limiting assembly. The lifting assembly outputs power in the vertical direction and is used for lifting a material disc on a conveying line from the lower portion. The blocking assemblies are arranged on the left side and the right side of the lifting assembly and used for blocking the trays from the front side and the rear side. The limiting assembly is arranged on the front side of the lifting assembly. According to the automatic feeding device, circulating conveying and feeding of the material disc are achieved, the feeding efficiency is effectively improved, the feeding continuity and stability are improved, meanwhile, blocking positioning, lifting supporting and limiting and correcting of the material disc and the material are integrated, the position accuracy of the material disc and the material is effectively improved, and the assembling or film tearing precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of screen manufacturing equipment, in particular to a material tray blocking and limiting lifting mechanism and a material tray circulating flow device. Background Art

[0002] Screens are an indispensable part of all kinds of smart terminal devices. They are the display and operation input structure of terminal devices. In recent years, devices such as smart phones have gradually become popular, and product updates and iterations are also ongoing. The screen manufacturing process involves multiple processes. For mobile phone screens, lens accessories need to be assembled on the back during the production and assembly process. Lens accessories include metal lens frames and lenses. Generally, the lenses need to be assembled in the lens frames, and then the two are assembled as a whole to the back of the screen.

[0003] Based on the lens frame structure, in order to protect the assembly surface before assembly, a protective film material is attached to the surface of the lens frame. The film material attached to the surface of the lens frame includes a back film and a hole film, wherein the back film is attached to the surface of the lens frame on its entire surface, and the hole film is attached to a plurality of circular grooves opened on the surface of the lens frame. The circular grooves are used for assembling corresponding circular lenses in subsequent workstations. Therefore, when assembling lenses or tearing the film before assembly, the automatic transmission problem of the lens frame needs to be solved first, and the blocking positioning and lifting limit problems of the material tray and the lens frame loaded in the material tray also need to be solved to ensure the position accuracy of the material tray and the lens frame inside it during the tearing or assembly process. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a material tray blocking and limiting lifting mechanism and a material tray circulating flow device thereof, which realizes the circulating transmission and feeding of the material tray, effectively improves the feeding efficiency, improves the continuity and stability of the feeding, and integrates blocking positioning, lifting support and limiting correction of the material tray and the material, effectively improves the positioning accuracy of the material tray and the material, and improves the assembly or film tearing accuracy.

[0005] The technical solution adopted by the utility model is as follows: a material tray blocking, limiting and lifting mechanism, comprising a blocking and lifting mechanism and a limiting mechanism, wherein the blocking and lifting mechanism is arranged below the conveyor belt of the transmission line, and outputs power in the vertical direction, so as to block and lift the material tray transmitted in a straight line on the transmission line; the limiting mechanism is arranged above the blocking and lifting mechanism, and outputs power in the vertical direction, so as to press the material tray on the transmission line from below, so as to guide the limited material tray; the blocking and lifting mechanism comprises a lifting assembly, a blocking assembly and a limiting assembly; the lifting assembly outputs power in the vertical direction, so as to lift the material tray on the transmission line from below; the blocking assembly is arranged on the left and right sides of the lifting assembly, and rises and falls with the lifting assembly, and outputs upward power, so as to block the flow of the material tray from the front and rear sides; the limiting assembly is arranged on the front side of the lifting assembly, so as to guide the limiting mechanism.

[0006] Preferably, the lifting assembly includes a lifting support, a lifting cylinder, a lifting plate and a support plate, wherein the lifting support is horizontally arranged; the lifting plate is arranged above the lifting support in parallel and at intervals; the lifting cylinder is vertically arranged on the lifting support, and the output shaft extends upward through the lifting plate; the support plate is horizontally arranged above the lifting plate and connected to the output end of the lifting cylinder, and is driven by the lifting cylinder to move up and down, so as to lift the material tray on the conveyor belt from bottom to top.

[0007] Preferably, the blocking assembly includes two groups, and the two groups of blocking assemblies are respectively arranged on both sides of the lifting assembly for blocking the flow of material trays; the blocking assembly includes a connecting plate, a first blocking cylinder and a first blocking rod, wherein the connecting plate is horizontally connected to the support plate and extends horizontally outward; the first blocking cylinder is vertically arranged below the connecting plate, and the output end is arranged upward; the first blocking rod is vertically connected to the output end of the first blocking cylinder, and extends upward through the air avoidance groove opened on the connecting plate, and is used to extend upward above the conveyor belt to block the flow of material trays on the conveyor belt.

[0008] Preferably, the limit assembly includes a first limit cylinder, a first limit slide and a limit rod, wherein the first limit cylinder is vertically arranged at the lower part of the lifting support plate, and the output end is arranged downward; the first limit slide is horizontally arranged below the lifting support plate, and is connected to the output end of the lifting support plate; the limit rod includes two limit rods, and the two limit rods are vertically connected to the first limit slide, and extend vertically upward through the lifting support plate to extend upward; the first limit cylinder drives the limit rod to move up and down through the first limit slide.

[0009] Preferably, the limiting mechanism includes a second limiting cylinder, a second limiting slide, a limiting plate, a panel, a side limiting plate, a first pressure plate and a second pressure plate, wherein the second limiting cylinder is vertically arranged on the rear side of the blocking and lifting mechanism; the second limiting slide is connected to the output end of the second limiting cylinder; the limiting plate is horizontally arranged on the second limiting slide and extends to above the transmission line, and a limiting through groove is provided on the limiting plate, the length of the limiting through groove is not less than the length of the material tray, and the width of the limiting through groove is not less than the width of the material tray; the panel is connected to the limiting through groove of the limiting plate, and at least two limiting grooves are provided on the panel corresponding to the material slot of the material tray, and the limiting grooves are embedded in the material slot of the material tray from the outside.

[0010] Preferably, the side limiting plates include two plates, which are respectively vertically connected to the left and right sides of the inlay plate, and are used to limit the material tray from the left and right sides; the first pressing plate and the second pressing plate are respectively horizontally connected to the front and rear sides of the inlay plate, and the bottom of the first pressing plate and the second pressing plate is provided with an upwardly concave pressing groove near one side of the material tray, which is used to be pressed downward on the front and rear sides of the material tray.

[0011] Preferably, the second pressing plate is provided with two through slots;

[0012] A tray circulation device with a tray blocking, limiting and lifting mechanism, comprises a transmission line and a return line, which are parallel and spaced apart; the transmission line and the return line drive a tensioning roller used for tensioning the transmission belt to rotate through a motor-driven transmission belt, thereby driving the transmission belt to drive the tray to move linearly; the transmission line is used to linearly transmit the tray loaded with materials; the return line is used to reversely transmit and reflux an empty tray from which materials are taken out after processing, so as to realize a circulation flow of the tray; at least two processing stations are arranged at intervals on the transmission line, and blocking and lifting mechanisms and limiting mechanisms are arranged at at least two processing stations; the blocking and lifting mechanism blocks and positions the tray transmitted on the transmission line, and lifts and supports the tray upwards; the limiting mechanism moves downward to limit and correct the tray.

[0013] The beneficial effects of the utility model are:

[0014] In view of the defects and shortcomings of the prior art, the utility model independently developed and designed a material tray circulating transmission feeding, which effectively improves the feeding efficiency, improves the continuity and stability of feeding, and at the same time integrates blocking positioning, lifting support and limiting correction of the material tray and material, effectively improves the positioning accuracy of the material tray and material, and improves the assembly or film tearing accuracy. The utility model has realized a material tray blocking and limiting lifting mechanism and a material tray circulating flow device.

[0015] The utility model belongs to the core mechanism in the automatic assembly production line of mobile phone screen lens accessories. Its function is to realize the automatic feeding and transportation of lens frame materials by using the material tray as a carrier and the circular flow transportation of the material tray. Specifically, the utility model includes a transmission line and a return line arranged in parallel and spaced apart. The transmission line and the return line are used to transmit the material tray loaded with lens frames and the empty material tray respectively. After the transmission line transmits the material tray loaded with lens frames to different processing stations, it is blocked and positioned by the material tray blocking and limiting lifting mechanism, and then supported from below, and the material tray and the lens frame inside it are limited and corrected, so as to perform assembly processing or film tearing and other actions. After the material in the material tray is taken out after the assembly is completed, the empty material tray is transferred to the return line, and reversely refluxed through the return line, thereby forming a circular feeding of the material tray, effectively improving the material supply efficiency and its supply continuity and stability. When the material tray drives the lens frame to move to the film tearing station, it is first blocked and positioned by the blocking component, and then the lifting component lifts the material tray from below and lifts it upward, so that the material tray is separated from the suspended support of the conveyor belt. The limiting mechanism presses the material tray from above, and drives the panel set at its bottom to press downward toward the material tray through the limiting plate, so that the limiting through groove of the limiting plate is nested on the material tray from the outside of the material tray, and the limiting groove on the panel is nested on the outside of the material slot on the material tray from the outside of the material slot, so that the lens frame in the material slot of the limiting material tray is corrected through the limiting groove, so that the lens frame in the material slot of the limiting material tray due to the transmission process is not The lens frame that has been displaced in the film is corrected and guided before the film is torn off; at the same time, the limit plate drives the side limit plate, the first pressure plate and the second pressure plate arranged below it to limit and correct the material tray from the front, back, left and right sides of the material tray, and the inwardly recessed step-type pressing grooves arranged at the lower parts of the first pressure plate and the second pressure plate on the front and back sides limit the material tray from the front and back sides while pressing the material tray downward on the lifting assembly, so that the position stability of the material tray during the film tearing process is maintained by the downward pressure, so as to avoid the situation where the material tray is displaced in the process of film tearing due to the force of the film tearing pulling force on the material tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the three-dimensional structural schematic diagrams of the utility model.

[0017] Figure 2 This is the second schematic diagram of the three-dimensional structure of the utility model.

[0018] Figure 3 for Figure 2 The enlarged structural diagram at point I in the middle.

[0019] Figure 4 This is the third schematic diagram of the three-dimensional structure of the present utility model.

[0020] Figure 5 This is the fourth schematic diagram of the three-dimensional structure of the present utility model.

[0021] Figure 6This is the third three-dimensional structural schematic diagram of the material tray circulation device of the utility model.

[0022] Figure 7 This is the third three-dimensional structural schematic diagram of the material tray circulation device of the utility model.

[0023] Figure 8 This is the third three-dimensional structural schematic diagram of the material tray circulation device of the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figures 1 to 5 As shown, the utility model proposes a material tray blocking, limiting and lifting mechanism, including a blocking and lifting mechanism 7 and a limiting mechanism 8, wherein the blocking and lifting mechanism 7 is arranged below the conveyor belt of the transmission line, and outputs power in the vertical direction, so as to block and lift the material tray transmitted in a straight line on the transmission line; the limiting mechanism 8 is arranged above the blocking and lifting mechanism 7, and outputs power in the vertical direction, so as to press the material tray on the transmission line from below, so as to guide the limited material tray; the blocking and lifting mechanism 7 includes a lifting component, a blocking component and a limiting component; the lifting component outputs power in the vertical direction, so as to lift the material tray on the transmission line from below; the blocking component is arranged on the left and right sides of the lifting component, and rises and falls with the lifting component, and outputs upward power, so as to block the flow of the material tray from the front and rear sides; the limiting component is arranged on the front side of the lifting component, so as to guide the limiting mechanism 8.

[0028] The lifting assembly includes a lifting support 71, a lifting cylinder 72, a lifting plate 73 and a support plate 74, wherein the lifting support 71 is horizontally arranged; the lifting plates 73 are arranged above the lifting support 71 in parallel and at intervals; the lifting cylinder 72 is vertically arranged on the lifting support 71, and the output shaft extends upward through the lifting plate 73; the support plate 74 is horizontally arranged above the lifting plate 73 and is connected to the output end of the lifting cylinder 72, and is driven by the lifting cylinder 72 to move up and down, so as to lift the material tray on the conveyor belt from bottom to top.

[0029] The blocking assembly includes two groups, and the two groups of blocking assemblies are respectively arranged on both sides of the lifting assembly for blocking the flow of material trays; the blocking assembly includes a connecting plate 75, a first blocking cylinder 76 and a first blocking rod 77, wherein the connecting plate 75 is horizontally connected to the supporting plate 74 and extends horizontally outward; the first blocking cylinder 76 is vertically arranged below the connecting plate 75, and the output end is arranged upward; the first blocking rod 77 is vertically connected to the output end of the first blocking cylinder 76, and extends upward through the air avoidance groove opened on the connecting plate 75, and is used to extend upward above the conveyor belt to block the flow of material trays on the conveyor belt.

[0030] The limiting assembly includes a first limiting cylinder 78, a first limiting slide 79 and a limiting rod 710, wherein the first limiting cylinder 78 is vertically arranged at the lower part of the lifting support plate 73, and the output end is arranged downward; the first limiting slide 79 is horizontally arranged below the lifting support plate 73, and is connected to the output end of the lifting support plate 73; the limiting rod 710 includes two limiting rods 710, and the two limiting rods 710 are vertically connected to the first limiting slide 79, and extend vertically upward through the lifting support plate 73 to extend upward; the first limiting cylinder 78 drives the limiting rod 710 to move up and down through the first limiting slide 79.

[0031] The limiting mechanism 8 includes a second limiting cylinder 81, a second limiting slide 82, a limiting plate 83, an insert plate 84, a side limiting plate 85, a first pressure plate 86 and a second pressure plate 87, wherein the second limiting cylinder 81 is vertically arranged on the rear side of the blocking and lifting mechanism 7; the second limiting slide 82 is connected to the output end of the second limiting cylinder 81; the limiting plate 83 is horizontally arranged on the second limiting slide 82 and extends to above the transmission line, and a limiting through groove A is provided on the limiting plate 83, the length of the limiting through groove A is not less than the length of the material tray 0, and the width of the limiting through groove A is not less than the width of the material tray 0; the insert plate 84 is connected to the limiting through groove A of the limiting plate 83, and at least two limiting grooves B are provided on the insert plate 84 corresponding to the material slot of the material tray 0, and the limiting groove B is embedded in the material slot of the material tray 0 from the outside.

[0032] The side limiting plates 85 include two plates, which are respectively vertically connected to the left and right sides of the inlay plate 84, and are used to limit the material tray 0 from the left and right sides; the first pressing plate 86 and the second pressing plate 87 are respectively horizontally connected to the front and rear sides of the inlay plate 84, and the bottom of the first pressing plate 86 and the second pressing plate 87 is provided with an upwardly concave pressing groove C near one side of the material tray 0, which is used to be pressed downward on the front and rear sides of the material tray 0.

[0033] The second pressing plate 87 is provided with two through slots D. The limiting rod 710 passes through the through slots D and the insert plate 84 and presses upward against the limiting plate 83 .

[0034] like Figures 6 to 8 As shown, as an embodiment of the utility model, a tray circulation device of the utility model with a tray blocking, limiting and lifting mechanism comprises a transmission line 2 and a return line 3, and the transmission line 2 and the return line 3 are parallel and spaced apart; the transmission line 2 and the return line 3 drive the tensioning roller used for tensioning the transmission belt to rotate through a motor-driven transmission belt, thereby driving the transmission belt to drive the tray to move linearly; the transmission line 2 is used to linearly transmit the tray 0 loaded with materials; the return line 3 is used to reversely transmit and reflux the empty tray from which the materials are taken out after processing, so as to realize the circulation of the tray; at least two processing stations are arranged on the transmission line 2, and at least two processing stations are provided with a blocking and lifting mechanism 7 and a limiting mechanism 8; the blocking and lifting mechanism 7 blocks and positions the tray transmitted on the transmission line 2, and lifts and supports the tray upward; the limiting mechanism 8 moves downward to limit and correct the tray.

[0035] The utility model designs a material tray blocking and limiting lifting mechanism and its material tray circulating flow device that realizes the circular transmission and feeding of material trays, effectively improves the feeding efficiency, improves the continuity and stability of feeding, and integrates blocking positioning, lifting support and limiting correction of material trays and materials, effectively improves the position accuracy of material trays and materials, and improves the assembly or film tearing accuracy. The utility model belongs to the core mechanism in the automatic assembly production line of mobile phone screen lens accessories. Its function is to use the material tray as a carrier and the circular circulation transportation of the material tray to realize the automatic feeding and transportation of lens frame materials. Specifically, the utility model includes a transmission line and a return line arranged in parallel and at intervals, the transmission line and the return line are respectively used to transmit a tray loaded with lens frames and an empty tray. After the transmission line transmits the tray loaded with lens frames to different processing stations, it is blocked and positioned by a tray blocking and limiting lifting mechanism, and then supported from below, and the tray and the lens frames therein are limited and corrected to facilitate assembly processing or film tearing and other actions. After the assembly is completed, the material in the tray is taken out and the empty tray is transferred to the return line, which flows back through the return line, thereby forming a tray circulation feeding, effectively improving the material supply efficiency and the continuity and stability of the material supply. When the material tray drives the lens frame to move to the film tearing station, it is first blocked and positioned by the blocking component, and then the lifting component lifts the material tray from below and lifts it upward, so that the material tray is separated from the suspended support of the conveyor belt. The limiting mechanism presses the material tray from above, and drives the panel set at its bottom to press downward toward the material tray through the limiting plate, so that the limiting through groove of the limiting plate is nested on the material tray from the outside of the material tray, and the limiting groove on the panel is nested on the outside of the material slot on the material tray from the outside of the material slot, so that the lens frame in the material slot of the limiting material tray is corrected through the limiting groove, so that the lens frame in the material slot of the limiting material tray due to the transmission process is not The lens frame that has been displaced in the film is corrected and guided before the film is torn off; at the same time, the limit plate drives the side limit plate, the first pressure plate and the second pressure plate arranged below it to limit and correct the material tray from the front, back, left and right sides of the material tray, and the inwardly recessed step-type pressing grooves arranged at the lower parts of the first pressure plate and the second pressure plate on the front and back sides limit the material tray from the front and back sides while pressing the material tray downward on the lifting assembly, so that the position stability of the material tray during the film tearing process is maintained by the downward pressure, so as to avoid the situation where the material tray is displaced in the process of film tearing due to the force of the film tearing pulling force on the material tray.

[0036] The embodiments of the utility model are only to introduce its specific implementation methods and are not intended to limit its protection scope. The technicians in this industry can make some modifications inspired by the embodiments, so any equivalent changes or modifications made in accordance with the scope of the utility model patent are within the scope of the claims of the utility model patent.

Claims

1. A tray blocking and limiting lifting mechanism, characterized in that: It comprises a blocking and lifting mechanism (7) and a limiting mechanism (8), wherein: The blocking and lifting mechanism (7) is arranged below the conveyor belt of the transmission line and outputs power in the vertical direction, so as to block and lift the material tray being transmitted linearly on the transmission line; The limiting mechanism (8) is arranged above the blocking and lifting mechanism (7) and outputs power in the vertical direction to press the material tray on the transmission line from below so as to guide the limiting material tray; The blocking lifting mechanism (7) comprises a lifting component, a blocking component and a limiting component; the lifting component outputs power in the vertical direction, and is used to lift the material tray on the transmission line from below; the blocking component is arranged on the left and right sides of the lifting component, and rises and falls with the lifting component, and outputs upward power, and is used to block the flow of the material tray from the front and rear sides; the limiting component is arranged on the front side of the lifting component, and is used to guide the limiting mechanism (8).

2. A tray blocking and limiting lifting mechanism according to claim 1, characterized in that: The lifting assembly comprises a lifting support (71), a lifting cylinder (72), a lifting plate (73) and a supporting plate (74), wherein the lifting support (71) is arranged horizontally; the lifting plate (73) is arranged above the lifting support (71) in parallel and at intervals; the lifting cylinder (72) is arranged vertically on the lifting support (71), and the output shaft passes through the lifting plate (73) and extends upward; the supporting plate (74) is arranged horizontally above the lifting plate (73) and is connected to the output end of the lifting cylinder (72), and is driven by the lifting cylinder (72) to move up and down, so as to lift the material tray on the conveyor belt from bottom to top.

3. A tray blocking and limiting lifting mechanism according to claim 2, characterized in that: The blocking assembly includes two groups, and the two groups of blocking assemblies are respectively arranged on both sides of the lifting assembly, and are used to block the flow of material trays; the blocking assembly includes a connecting plate (75), a first blocking cylinder (76) and a first blocking rod (77), wherein the connecting plate (75) is horizontally connected to the supporting plate (74) and extends horizontally outward; the first blocking cylinder (76) is vertically arranged below the connecting plate (75), and the output end is arranged upward; the first blocking rod (77) is vertically connected to the output end of the first blocking cylinder (76), and extends upward through the air avoidance groove opened on the connecting plate (75), and is used to extend upward into the top of the conveyor belt to block the flow of material trays on the conveyor belt.

4. A tray blocking and limiting lifting mechanism according to claim 2, characterized in that: The limiting assembly comprises a first limiting cylinder (78), a first limiting slide seat (79) and a limiting rod (710), wherein: The first limiting cylinder (78) is vertically arranged at the lower part of the lifting support plate (73), and the output end is arranged downward; the first limiting slide (79) is horizontally arranged below the lifting support plate (73), and is connected to the output end of the lifting support plate (73); the limiting rod (710) includes two limiting rods (710), which are vertically connected to the first limiting slide (79) and extend vertically upward through the lifting support plate (73) and extend upward; the first limiting cylinder (78) drives the limiting rod (710) to move up and down through the first limiting slide (79).

5. A tray blocking and limiting lifting mechanism according to claim 1, characterized in that: The limiting mechanism (8) comprises a second limiting cylinder (81), a second limiting slide (82), a limiting plate (83), a panel (84), a side limiting plate (85), a first pressing plate (86) and a second pressing plate (87), wherein the second limiting cylinder (81) is vertically arranged at the rear side of the blocking and lifting mechanism (7); the second limiting slide (82) is connected to the output end of the second limiting cylinder (81); the limiting plate (83) is horizontally arranged on the second limiting slide ( 82) and extends above the transmission line, the limiting plate (83) is provided with a limiting through slot (A), the length of the limiting through slot (A) is not less than the length of the material tray (0), and the width of the limiting through slot (A) is not less than the width of the material tray (0); the insert plate (84) is connected to the limiting through slot (A) of the limiting plate (83), and at least two limiting slots (B) are provided on the insert plate (84) corresponding to the material slot of the material tray (0), and the limiting slots (B) are embedded in the material slot of the material tray (0) from the outside.

6. A tray blocking and limiting lifting mechanism according to claim 5, characterized in that: The side limiting plates (85) include two plates, the two side limiting plates (85) are respectively vertically connected to the left and right sides of the insert plate (84) for limiting the material tray (0) from the left and right sides; the first pressing plate (86) and the second pressing plate (87) are respectively horizontally connected to the front and rear sides of the insert plate (84); the bottoms of the first pressing plate (86) and the second pressing plate (87) are provided with upwardly concave pressing grooves (C) near the material tray (0) for downwardly pressing on the front and rear sides of the material tray (0).

7. A tray blocking and limiting lifting mechanism according to claim 6, characterized in that: The second pressing plate (87) is provided with two through slots (D).

8. A tray circulation device with a tray blocking, limiting and lifting mechanism according to any one of claims 1 to 7, characterized in that: The invention comprises a transmission line (2) and a return line (3), wherein the transmission line (2) and the return line (3) are arranged in parallel and spaced apart; the transmission line (2) and the return line (3) drive a tensioning roller for tensioning the transmission belt to rotate through a motor-driven transmission belt, thereby driving the transmission belt to drive the material tray to move linearly; the transmission line (2) is used to linearly transmit a material tray (0) loaded with materials; the return line (3) is used to reversely transmit and reflux an empty material tray from which materials have been taken out after processing, thereby realizing a circulating flow of the material tray; at least two processing stations are arranged on the transmission line (2) at intervals, and at least two processing stations are provided with a blocking and lifting mechanism (7) and a limiting mechanism (8); the blocking and lifting mechanism (7) blocks and positions the material tray transmitted on the transmission line (2), and lifts and supports the material tray upwards; the limiting mechanism (8) moves downward to limit and correct the material tray.

Images