A kind of edge forming equipment for printed matter processing

Abstract

The utility model discloses an edge covering forming equipment for printed matter processing relates to printed matter processing technical field, the utility model discloses a work table provides stable support's basis for integral equipment still includes processing mechanism, the utility model discloses through setting adjusting assembly and self -adaptation component, specifically is top conveyer belt when conveying printed matter, is influenced by printed matter force, will make compression roller force up -move, and then drive support frame two extrusion spring two, spring two shrink energy storage and produce resilience and make compression roller reset, let conveyer belt outer ring always contact with printed matter top, realize self -adaptation conveying, improve equipment versatility, reduce debugging and downtime, improve efficiency, in addition, operating personnel can rotate hand wheel and drive threaded rod rotation in clockwise, make back bottom support frame move to the front through the connecting block, move top support frame simultaneously, adjust two groups of conveyer belt interval, further improve equipment versatility.

Description

Technical Field

[0001] This utility model belongs to the field of printing processing technology, and in particular relates to an edge-forming device for printing processing. Background Technology

[0002] In the field of printing processing, edge binding is a crucial process, and its quality and efficiency directly affect the quality of the final product and production benefits. However, in traditional edge binding equipment, the conveyor device often lacks adaptability in the conveying process of printed materials, making it difficult to automatically adjust according to the actual thickness of the printed materials. This results in poor contact between the conveyor belt and the printed materials, causing problems such as shaking and deviation of the printed materials during the conveying process. This seriously affects the accuracy and quality of edge binding and makes it difficult to use printed materials of various widths and thicknesses, reducing the versatility of the equipment. Therefore, an edge binding equipment for printing processing is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a binding and forming device for printing processing. By setting adjustment components and adaptive components, specifically, when the top conveyor belt is conveying printed materials, the pressure roller is moved upward due to the force of the printed materials. This, in turn, drives the second support frame to squeeze the second spring. The second spring contracts, stores energy, and generates a rebound force to reset the pressure roller, ensuring that the outer ring of the conveyor belt is always in contact with the top of the printed materials, thus achieving adaptive conveying. Rotating the handwheel clockwise drives the threaded rod to rotate, which moves the bottom support frame on the back to the front through the connecting block, while simultaneously moving the top support frame, adjusting the distance between the two sets of conveyor belts. This further improves the versatility of the equipment and solves the problem that in traditional binding and forming equipment, the conveyor device often lacks adaptive capability in the process of conveying printed materials. It is difficult to automatically adjust according to the actual thickness of the printed materials, resulting in poor contact between the conveyor belt and the printed materials. This causes problems such as shaking and deviation of the printed materials during the conveying process, which seriously affects the accuracy and quality of binding and forming, and makes it difficult to use printed materials of various widths and thicknesses, reducing the versatility of the equipment.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to an edge-binding forming device for printing processing, including a worktable, which provides a stable support foundation for the entire device, and also includes:

[0006] A processing mechanism is arranged above the workbench and is used for edge binding and conveying printed materials of various thicknesses and widths;

[0007] The processing mechanism includes a width adjustment component and a thickness adaptive component. The adjustment component includes a threaded rod, and the adaptive component includes a pressure roller. A scale line is provided on the left side of the top of the worktable, and an opening is provided on the back side of the top of the worktable.

[0008] Furthermore, the processing mechanism also includes:

[0009] An edge-binding assembly, connected to an adjustment assembly, is used for edge-binding printing materials; and

[0010] A reinforcing component is connected to an adjusting component, and the reinforcing component is used to further compress and reinforce the printed material after edge binding.

[0011] The number of the reinforcement components is two sets, and the two sets of reinforcement components contain the same parts.

[0012] Furthermore, the edging assembly includes a motor, the output end of the motor is connected to a rotating shaft via a coupling, and the front of the outer surface of the rotating shaft is connected to a conveyor wheel. There are eight conveyor wheels, which are arranged in groups of four. Two limiting grooves are opened on the inner wall of the conveyor wheel located at the bottom right side of the back. Limiting strips are slidably connected inside the two limiting grooves. The corresponding sides of the two limiting strips are welded to the outer surface of the rotating shaft. The outer surfaces of the eight conveyor wheels are connected to a conveyor belt in groups of two.

[0013] Furthermore, a handwheel is welded to the front of the threaded rod, the threaded rod passes through the workbench and extends to the front, the handwheel is located on the front of the workbench, a connecting block is threaded to the outer surface of the threaded rod, the connecting block passes through the opening and extends to the top, the outer wall of the connecting block is slidably connected to the inner wall of the opening, and two support frames are provided on the front and back of the top of the workbench, the bottom of the support frame located at the bottom of the back is welded to the top of the connecting block;

[0014] The four support frames are arranged in pairs.

[0015] Furthermore, the bottom of the support frame located at the bottom of the front is welded to the top of the workbench, and arc-shaped guide grooves are welded to the corresponding sides of the two support frames located on the front and back. Guide nozzles are welded to the left side of each of the four support frames. The left and right sides of the two support frames located at the top are connected to the inside of the top conveyor wheel by pins, and the left sides of the two support frames located at the bottom are connected to the inside of the two conveyor wheels located on the left side of the bottom by pins.

[0016] The two guide nozzles are respectively set with an arc surface on one side.

[0017] Furthermore, the reinforcement component located on the back includes a fixed wheel, and a bracket is connected to the outside of the fixed wheel via a pin. The left side of the bracket is welded to the right side of the support frame located at the bottom, and a fixed plate is welded to the right side of the support frame located at the top. A sliding rod is slidably connected inside the fixed plate. The sliding rod passes through the fixed plate and extends to the bottom. A support frame is welded to the bottom of the sliding rod. A movable wheel is connected to the inside of the support frame via a pin. A spring is sleeved on the outer surface of the sliding rod. The bottom of the spring is connected to the top of the support frame, and the top of the spring is connected to the bottom of the fixed plate. The fixed wheel and the movable wheel have the same shape, and the outer rings of both the fixed wheel and the movable wheel are anti-slip.

[0018] Furthermore, the number of pressure rollers is several, and the several pressure rollers are arranged in two groups. The two groups of pressure rollers are respectively arranged in the inner ring of the conveyor belt at the top. A horizontal plate is arranged above the several pressure rollers on the back side. The back side of the horizontal plate is welded to the inner wall of the support frame at the top of the back side. Several springs are connected to the bottom of the horizontal plate. Each of the several springs has a support rod in its inner ring. The top of the several support rods is welded to the bottom of the horizontal plate. Each of the several springs is connected to a support frame on the side away from the horizontal plate. The inside of each of the several support frames is connected to the inside of the pressure rollers through pins.

[0019] Among them, several of the outer rings of the pressure rollers are in contact with the inner wall of the conveyor belt located at the top.

[0020] This utility model has the following beneficial effects:

[0021] 1. This utility model, by setting up adjustment components and adaptive components, specifically, when the top conveyor belt is conveying printed materials, the pressure roller will be moved upward due to the force of the printed materials. This will cause the second support frame to squeeze the second spring. The second spring will contract and store energy, generating a rebound force to make the pressure roller return to its original position, so that the outer ring of the conveyor belt is always in contact with the top of the printed materials, realizing adaptive conveying, improving the versatility of the equipment, reducing debugging and downtime, and improving efficiency. In addition, the operator can turn the handwheel clockwise to drive the threaded rod to rotate, which will move the bottom support frame on the back to the front through the connecting block, and at the same time drive the top support frame to move, adjusting the distance between the two sets of conveyor belts, further improving the versatility of the equipment.

[0022] 2. This utility model incorporates a reinforcing component. Specifically, after the printed material is conveyed and edged by the conveyor belt, it passes between the fixed wheel and the moving wheel. The moving wheel, driven by the force of the printed material, moves the support frame upward. Simultaneously, the moving support frame compresses the spring. After the spring contracts and stores energy, it generates a rebound force that resets the moving wheel. Its outer ring clamps the top of the printed material again, and in conjunction with the fixed wheel, it compresses the printed material again, thereby improving the adhesion between the edge banding and the printed material and the edge-binding effect.

[0023] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure of the bottom of the workbench of this utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the support frame of this utility model;

[0028] Figure 4 This utility model Figure 3 A magnified structural diagram of A in the middle;

[0029] Figure 5 This utility model Figure 3 A magnified structural diagram of B in the diagram;

[0030] Figure 6 This is a schematic diagram of the overall structure of the arc-shaped guide groove of this utility model.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 111. Workbench; 112. Scale line; 113. Opening; 2. Machining mechanism; 21. Edge binding assembly; 211. Motor; 212. Rotating shaft; 213. Limiting slide bar; 214. Conveyor wheel; 215. Limiting slide groove; 216. Conveyor belt; 217. Guide nozzle; 218. Arc guide groove; 22. Adjustment assembly; 221. Handwheel; 222. Threaded rod; 223. Connecting block; 224. Support frame; 23. Reinforcing assembly; 231. Fixed wheel; 232. Bracket one; 233. Fixed plate; 234. Moving wheel; 235. Support frame one; 236. Spring one; 237. Slide bar; 24. Adaptive assembly; 241. Horizontal plate; 242. Pressure roller; 243. Support frame two; 244. Spring two; 245. Support rod. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-6 As shown, this utility model is a binding and forming device for printing processing, including a worktable 111, which provides a stable support for the entire device, and also includes:

[0035] Processing mechanism 2 is located above worktable 111. Processing mechanism 2 is used to edge and convey printed materials of various thicknesses and widths. Processing mechanism 2 includes width adjustment component 22 and thickness adaptive component 24. Adjustment component 22 includes threaded rod 222 and adaptive component 24 includes pressure roller 242.

[0036] The workbench 111 has a scale line 112 on the left side of the top, and an opening 113 on the back of the top of the workbench 111.

[0037] Processing mechanism 2 also includes:

[0038] Edge binding assembly 21 is connected to adjustment assembly 22, and edge binding assembly 21 is used for edge binding processing of printed materials; and

[0039] The reinforcing component 23 is connected to the adjusting component 22. The reinforcing component 23 is used to further compress and reinforce the printed material after edge binding. There are two sets of reinforcing components 23, and the two sets of reinforcing components 23 contain the same parts.

[0040] The edge-binding assembly 21 includes a motor 211. The output end of the motor 211 is connected to a rotating shaft 212 via a coupling. The front of the outer surface of the rotating shaft 212 is connected to a conveyor wheel 214. There are eight conveyor wheels 214, which are arranged in groups of four. The inner wall of the conveyor wheel 214 located at the bottom right side of the back is provided with two limiting grooves 215. The two limiting grooves 215 are slidably connected to limiting strips 213. The corresponding side of the two limiting strips 213 is welded to the outer surface of the rotating shaft 212. The outer surface of the eight conveyor wheels 214 is connected to a conveyor belt 216 in groups of two.

[0041] A handwheel 221 is welded to the front of the threaded rod 222. The threaded rod 222 passes through the workbench 111 and extends to the front. The handwheel 221 is located on the front of the workbench 111. A connecting block 223 is threadedly connected to the outer surface of the threaded rod 222. The connecting block 223 passes through the opening 113 and extends to the top. The outer wall of the connecting block 223 is slidably connected to the inner wall of the opening 113. Two support frames 224 are provided on both the front and back of the top of the workbench 111. The bottom of the support frame 224 located at the bottom of the back is welded to the top of the connecting block 223. The four support frames 224 are arranged in pairs. The bottom of the support frame 224 located at the bottom of the front is welded to the top of the workbench 111. The two support frames 224 on the front and back are opposite each other. Each of the four support frames 224 has an arc-shaped guide groove 218 welded on one side, and a guide nozzle 217 welded on the left side. The left and right sides of the two support frames 224 at the top are connected to the conveyor wheel 214 at the top via pins. The left sides of the two support frames 224 at the bottom are connected to the two conveyor wheels 214 at the bottom left via pins. The two guide nozzles 217 are arc-shaped on opposite sides. The operator can rotate the handwheel 221 clockwise to rotate the threaded rod 222, and move the bottom support frame 224 at the back to the front via the connecting block 223, while simultaneously moving the top support frame 224 to adjust the spacing between the two sets of conveyor belts 216, further improving the equipment's versatility.

[0042] The reinforcing component 23 located on the back includes a fixed wheel 231. A bracket 232 is externally connected to the fixed wheel 231 via a pin. The left side of the bracket 232 is welded to the right side of the bottom support frame 224. A fixed plate 233 is welded to the right side of the top support frame 224. A sliding rod 237 is slidably connected inside the fixed plate 233, passing through the fixed plate 233 and extending to the bottom. A support frame 235 is welded to the bottom of the sliding rod 237. A movable wheel 234 is internally connected to the support frame 235 via a pin. A spring 236 is sleeved on the outer surface of the sliding rod 237. The bottom of the spring 236 is connected to the top of the support frame 235. The top of the 6-section is connected to the bottom of the fixed plate 233. The fixed wheel 231 and the movable wheel 234 have the same shape. The outer rings of the fixed wheel 231 and the movable wheel 234 are anti-slip. After the printed material is conveyed and edged by the conveyor belt 216, it will pass between the fixed wheel 231 and the movable wheel 234. The movable wheel 234 is driven by the force of the printed material to move the support frame 235 upward. At the same time, the support frame 235 moves to compress the spring 236. After the spring 236 contracts and stores energy, it generates a rebound force to reset the movable wheel 234. Its outer ring is clamped with the top of the printed material again, and it works with the fixed wheel 231 to squeeze the printed material again, improving the adhesion between the edge banding and the printed material and the edge banding effect.

[0043] There are several pressure rollers 242, arranged in two groups. The two groups of pressure rollers 242 are respectively positioned on the inner ring of the top conveyor belt 216. A horizontal plate 241 is positioned above the pressure rollers 242 on the back side. The back of the horizontal plate 241 is welded to the inner wall of the support frame 224 located at the top of the back side. Several springs 244 are connected to the bottom of the horizontal plate 241. Each spring 244 has a support rod 245 positioned on its inner ring. The top of each support rod 245 is welded to the bottom of the horizontal plate 241. A support frame 244 is connected to the side of each spring 244 away from the horizontal plate 241. 243, several support frames 243 are internally connected to the pressure rollers 242 via pins. The outer rings of the pressure rollers 242 are in contact with the inner wall of the top conveyor belt 216. When the top conveyor belt 216 is conveying printed materials, the pressure rollers 242 are forced upward by the force of the printed materials, which in turn causes the support frames 243 to compress the springs 244. The springs 244 contract and store energy, generating a rebound force to reset the pressure rollers 242, so that the outer rings of the conveyor belt 216 are always in contact with the top of the printed materials, realizing adaptive conveying, improving equipment versatility, reducing debugging and downtime, and improving efficiency.

[0044] A specific application of this embodiment is as follows: In use, first, the binding tape is passed through the inner wall of the curved guide groove 218 from left to right, and then the printed material with the binding tape is passed through the guide nozzles 217. At this time, the motor 211 is started to drive the rotating shaft 212 to rotate. When the rotating shaft 212 rotates, it will drive the conveyor wheel 214 on the bottom right side of the front to rotate. At the same time, when the rotating shaft 212 rotates, it will drive the conveyor wheel 214 on the bottom right side of the back to rotate through the action of the limiting slide bar 213 and the limiting slide groove 215. At this time, the two conveyor wheels 214 on the bottom right side will drive the two conveyor belts 216 at the bottom to rotate. When the conveyor belts 216 rotate, they will transport the printed material. At the same time, the bottom conveyor belts 216 will carry the printed material through the increased friction of the printed material. The two conveyor belts 216 at the top rotate, conveying the printed material through the action of the two conveyor belts 216 at the front and two at the back. During the conveying process, the front and back edges of the printed material move inside the arc-shaped guide groove 218. At this time, the edge-binding tape inside the arc-shaped guide groove 218 wraps around the edges of the printed material, and then the edge-binding process of the printed material is achieved by the mutual squeezing of the two conveyor belts 216. At the same time, when the top conveyor belt 216 conveys the printed material, the force of the printed material on the conveyor belt 216 will exert a force on several pressure rollers 242. The pressure rollers 242 will move upward under the force. During the movement of the pressure rollers 242, they will drive the support frame 243 to squeeze the spring 244, thus the spring... Spring 244, limited by the horizontal plate 241, contracts and stores energy. Simultaneously, spring 244 generates a rebound force, driving pressure roller 242 to reset. During the reset process, the outer ring of the top conveyor belt 216 remains in contact with the top of the printed material. During the contraction or extension of spring 244, support rod 245 provides a degree of restraint, reducing its tendency to sway. The top conveyor belt 216 adaptively transports the printed material, improving the equipment's versatility and reducing the need for constant adjustments to the conveyor belt 216 due to varying printed material thicknesses. This reduces downtime and improves work efficiency. Furthermore, operators can adjust the spacing between the two sets of conveyor belts 216 according to the width of the printed material. The distance between the two sets of conveyor belts 216 is adjusted by rotating the handwheel 221 clockwise to rotate the threaded rod 222. As the threaded rod 222 rotates, it moves the support frame 224 at the bottom of the back side towards the front via the connecting block 223. The opening 113 then limits the movement of the connecting block 223. During the movement of the support frame 224 at the bottom of the back side towards the front, it also moves the support frame 224 at the top, thus adjusting the distance between the two sets of conveyor belts 216. Simultaneously, as the conveyor belt 216 at the bottom of the back side moves, the conveyor wheel 214 on the bottom right side of the back side slides on the outer surface of the rotating shaft 212 through the limiting groove 215 and the limiting slide bar 213. This adjustment allows for the adjustment of the distance between the two sets of conveyor belts 216.This further enhances the versatility of the equipment;

[0045] Meanwhile, after the printed material is conveyed by the conveyor belt 216 and edge-wrapped, it passes between the fixed wheel 231 and the movable wheel 234. At this time, the movable wheel 234, under the force of the printed material, will drive the support frame 235 to move upward. When the support frame 235 moves, it will drive the slide rod 237 to move together. At this time, the slide rod 237 will slide inside the fixed plate 233. The fixed plate 233 provides a certain support force for the slide rod 237 by welding it to the top spring 244. During the movement of the support frame 235, it will compress the spring 236. The spring 236 will contract and store energy under the bottom limit of the fixed plate 233. At the same time, the spring 236 will generate a certain rebound force and drive the movable wheel 234 to reset. At this time, the outer ring of the movable wheel 234 will once again clamp the top of the printed material. At this time, the movable wheel 234, in cooperation with the fixed wheel 231, will achieve a second compression of the printed material, improve the adhesion between the edge-wrapping tape and the printed material, and improve the edge-wrapping effect.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A printing edge-binding forming device, comprising a worktable (111), wherein the worktable (111) provides a stable support foundation for the entire device, characterized in that, Also includes: Processing mechanism (2), which is located above the workbench (111), is used to edge and transport printed materials of various thicknesses and widths; The processing mechanism (2) includes a width adjustment component (22) and a thickness adaptive component (24). The adjustment component (22) includes a threaded rod (222), and the adaptive component (24) includes a pressure roller (242).

2. The edge-binding forming equipment for printing processing according to claim 1, characterized in that, The workbench (111) has a scale line (112) on the left side of the top, and an opening (113) is provided on the back of the top of the workbench (111).

3. The edge-binding forming equipment for printing processing according to claim 1, characterized in that, The processing mechanism (2) also includes: An edge-binding assembly (21), wherein the edge-binding assembly (21) is connected to an adjustment assembly (22), and the edge-binding assembly (21) is used for edge-binding of printed materials; and A reinforcing component (23) is connected to an adjusting component (22) and is used to further compress and reinforce the printed material after edge binding. The number of the reinforcement components (23) is two sets, and the two sets of reinforcement components (23) contain the same parts.

4. The edge-binding forming equipment for printing processing according to claim 3, characterized in that, The edge-binding assembly (21) includes a motor (211). The output end of the motor (211) is connected to a rotating shaft (212) via a coupling. The front of the outer surface of the rotating shaft (212) is connected to a conveyor wheel (214). There are eight conveyor wheels (214), and the eight conveyor wheels (214) are arranged in groups of four. The inner wall of the conveyor wheel (214) located at the bottom right side of the back is provided with two limiting grooves (215). The two limiting grooves (215) are slidably connected to limiting strips (213). The corresponding side of the two limiting strips (213) is welded to the outer surface of the rotating shaft (212). The outer surface of the eight conveyor wheels (214) is connected to a conveyor belt (216) in groups of two.

5. The edge-binding forming equipment for printing processing according to claim 1, characterized in that, The threaded rod (222) has a handwheel (221) welded to its front side. The threaded rod (222) passes through the workbench (111) and extends to the front side. The handwheel (221) is located on the front side of the workbench (111). A connecting block (223) is threadedly connected to the outer surface of the threaded rod (222). The connecting block (223) passes through the opening (113) and extends to the top. The outer wall of the connecting block (223) is slidably connected to the inner wall of the opening (113). Two support frames (224) are provided on the front and back sides of the top of the workbench (111). The bottom of the support frame (224) located at the bottom of the back side is welded to the top of the connecting block (223). The four support frames (224) are arranged in pairs.

6. The edge-binding forming equipment for printing processing according to claim 5, characterized in that, The bottom of the support frame (224) located at the bottom of the front is welded to the top of the workbench (111). The two support frames (224) located on the front and back are each welded with an arc-shaped guide groove (218) on their corresponding sides. The left side of each of the four support frames (224) is welded with a guide nozzle (217). The left and right sides of the two support frames (224) located at the top are connected to the inside of the conveyor wheel (214) located at the top through a pin. The left side of the two support frames (224) located at the bottom is connected to the inside of the two conveyor wheels (214) located at the bottom left through a pin. Among them, the two guide nozzles (217) are respectively set with an arc surface on one side.

7. The edge-binding forming equipment for printing processing according to claim 3, characterized in that, The reinforcement component (23) located on the back includes a fixed wheel (231). The fixed wheel (231) is externally connected to a bracket (232) via a pin. The left side of the bracket (232) is welded to the right side of the support frame (224) located at the bottom. A fixed plate (233) is welded to the right side of the support frame (224) located at the top. A sliding rod (237) is slidably connected inside the fixed plate (233). The sliding rod (237) passes through the fixed plate (233) and extends to the bottom. A support frame (235) is welded to the bottom of the sliding rod (237). A movable wheel (234) is internally connected to the support frame (235) via a pin.

8. The edge-binding forming equipment for printing processing according to claim 7, characterized in that, A spring (236) is sleeved on the outer surface of the slide rod (237). The bottom of the spring (236) is connected to the top of the support frame (235), and the top of the spring (236) is connected to the bottom of the fixing plate (233). The fixed wheel (231) and the movable wheel (234) have the same shape, and the outer rings of both the fixed wheel (231) and the movable wheel (234) are anti-slip.

9. The edge-binding forming equipment for printing processing according to claim 1, characterized in that, The number of pressure rollers (242) is several, and the several pressure rollers (242) are arranged in two groups. The two groups of pressure rollers (242) are respectively arranged in the inner ring of the conveyor belt (216) at the top. A horizontal plate (241) is arranged above the several pressure rollers (242) on the back side. The back side of the horizontal plate (241) is welded to the inner wall of the support frame (224) at the top of the back side. Several springs (244) are connected to the bottom of the horizontal plate (241). Support rods (245) are arranged in the inner ring of the several springs (244). The top of the several support rods (245) is welded to the bottom of the horizontal plate (241). Support frame (243) is connected to the side of the several springs (244) away from the horizontal plate (241). The inside of the several support frames (243) is connected to the inside of the pressure rollers (242) through pins. Among them, the outer rings of several of the pressure rollers (242) are in contact with the inner wall of the conveyor belt (216) located at the top.

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