Automatic feeding device of gilding machine

Abstract

The application relates to a gilding processing technical field, in particular to an automatic feeding device of a gilding machine. Through the cooperative work of a lifting mechanism, a transfer mechanism and a conveying mechanism, the high-speed operation state of the material supply link of the gilding machine is realized. The lifting mechanism cooperatively works with a driving motor, a screw rod and a linear guide rail, drives the vertical lifting of a loading plate, and the loading plate surface is provided with a limiting sliding groove, a slidable positioning strip and a fixed baffle. The position of the positioning strip and the limiting of the fixed baffle are adjusted. The transfer mechanism is composed of a grabbing assembly and a motion assembly. A connecting pipe is fixedly connected above a suction nozzle of the grabbing assembly. The connecting pipe is fixed in a limiting groove of the limiting strip through double nuts. The motion assembly realizes the horizontal and vertical movement of the grabbing assembly and the grabbed material through a linear module and a driving cylinder, transfers the material to the conveying mechanism, and drives the rotation of a roller through a control motor to ensure that the material is conveyed to the inside of the gilding machine.

Description

Technical Field

[0001] This application relates to the field of hot stamping processing technology, and in particular to an automatic feeding device for a hot stamping machine. Background Technology

[0002] Hot stamping machines are mainly used in the printing and packaging industry. Their core function is to attach a metallic decorative layer to the surface of flat materials such as paper and cardboard through a hot-press transfer process.

[0003] In the existing technical implementation, the material supply of the hot stamping machine mainly relies on manual operation. The operator needs to manually pick up the materials to be processed from the material area and place them one by one onto the conveyor platform.

[0004] However, this feeding method has the following drawbacks: manual feeding is difficult to maintain a high-speed operation, resulting in low efficiency. Utility Model Content

[0005] To address the challenge of maintaining high-speed operation in the material supply process of hot stamping machines, this application provides an automatic feeding device for hot stamping machines.

[0006] The automatic feeding device for a hot stamping machine provided in this application adopts the following technical solution: An automatic feeding device for a hot stamping machine includes a frame. A lifting mechanism, a transfer mechanism, and a conveying mechanism are mounted on the frame. Material is placed on the lifting mechanism, which lifts the material and connects it to the transfer mechanism. The transfer mechanism is located between the lifting mechanism and the conveying mechanism, and is positioned above the conveying mechanism. The transfer mechanism transfers the material to the conveying mechanism, which then transports the material to a designated working area.

[0007] By adopting the above technical solution, the lifting mechanism, the transfer mechanism and the conveying mechanism work together to realize the fully automated process of material grabbing and transfer. This effectively solves the problem that traditional manual feeding is difficult to maintain a high-speed operation, reduces production delays caused by human intervention interruption or error, and improves the overall efficiency of hot stamping processing.

[0008] Preferably, the lifting mechanism includes a carrier plate, a drive motor, a lead screw, and a connecting block. The carrier plate is slidably mounted on the frame in a vertical direction. The drive motor is located below the carrier plate. The output shaft of the drive motor is coaxially fixed with the lead screw. The connecting block is fixedly connected to the side wall of the carrier plate. The lead screw and the connecting block are threaded together.

[0009] By adopting the above technical solution, the drive motor is started, and the output shaft of the drive motor is fixed coaxially with the lead screw. The connecting block and the lead screw are threaded together to drive the vertical lifting and lowering of the carrier plate. The operator places the material on the carrier plate, which realizes the vertical lifting and lowering of the material and precise feeding. The carrier plate can carry multiple materials in batches at the same time, which improves the feeding efficiency and realizes the continuous production requirements.

[0010] Preferably, the carrier plate is provided with a plurality of limiting sliding grooves and positioning strips. The limiting sliding grooves are formed on the surface of the carrier plate, and the positioning strips are slidably disposed in the limiting sliding grooves along the length direction of the limiting sliding grooves. The positioning strips are perpendicular to the carrier plate.

[0011] By adopting the above technical solution, the limiting sliding groove of the carrier plate is slidably connected with the positioning strip. By flexibly adjusting the position of the positioning strip, the positioning strip abuts against the material to position the material, thereby constraining the size and shape of the material. The positioning strip slides along the length of the limiting sliding groove to adjust the limiting range according to the specifications and size requirements of different materials.

[0012] Preferably, the lifting mechanism further includes a fixed baffle, which is placed on the upper surface of the carrier plate.

[0013] By adopting the above technical solution, the fixed baffle fits against the edge of the material to form a limiting boundary, providing a physical barrier for the material and reducing the material slippage caused by vibration or accidental contact.

[0014] Preferably, the transfer mechanism includes a gripping component, which includes a suction nozzle, a connecting tube, and a limiting strip. There are several suction nozzles, each connected to an external air supply device. The limiting strip has a limiting groove, and the connecting tube passes through the limiting groove and is fixedly connected to the suction nozzle. The connecting tube slides horizontally within the limiting groove and can lock with the limiting strip. The suction nozzle is connected to an external air supply device, which is fixedly connected to the connecting tube.

[0015] By adopting the above technical solution, the flexible adjustment of the suction nozzle layout is achieved. The cooperation between the limiting groove and the connecting pipe allows the suction nozzle to be freely arranged and combined in the horizontal direction to adapt to the gripping needs of materials of different sizes or shapes. At the same time, it ensures that the suction nozzle is fixed in the adjusted position. The suction nozzle is connected to an external air supply device, which is connected to the connecting pipe to make the suction nozzle generate suction force, thereby realizing the adsorption and gripping of materials and ensuring the firmness of materials in the air.

[0016] Preferably, the transfer mechanism further includes a motion component, which includes a drive cylinder with its piston rod vertically downward and fixed perpendicularly to the limiting strip.

[0017] By adopting the above technical solution, the vertical lifting and lowering movement of the limit bar is driven by the drive cylinder, and the material can be accurately lifted and lowered in the vertical direction under the drive of the drive cylinder.

[0018] Preferably, the motion component further includes a linear module, which is arranged in a horizontal direction, and the drive cylinder is vertically fixed on the sliding seat of the linear module.

[0019] By adopting the above technical solution, the piston rod of the drive cylinder moves linearly to vertically lift the gripped material and connect it with the linear module. The sliding seat of the linear module transports the material adsorbed by the suction nozzle on the drive cylinder laterally to the conveying mechanism, realizing the smooth transfer of material to the conveying mechanism, realizing a continuous production process, and improving production efficiency.

[0020] Preferably, the conveying mechanism includes a control motor, a base plate, rollers, and a closed-loop conveyor belt. The base plate is horizontally arranged and fixed on the frame. Two rollers are provided, respectively arranged on both sides of the base plate. The rollers are rotatably supported on the frame. The control motor is installed inside the frame, and the output shaft of the control motor is coaxially fixed with one of the rollers. The closed-loop conveyor belt is sleeved on the two rollers, and the base plate is located inside the closed-loop conveyor belt.

[0021] By adopting the above technical solution, the closed-loop conveyor belt is fitted onto two rollers, and the control motor drives the rollers to rotate, thereby driving the continuous rotation of the closed-loop conveyor belt and realizing continuous material transportation. The base plate further improves the stability of the conveyor belt and reduces the probability of material slippage.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the coordinated work of the lifting mechanism, the transfer mechanism and the conveying mechanism, the entire process of material handling from grabbing to conveying is automated, effectively replacing traditional manual feeding and significantly improving the efficiency of hot stamping processing; 2. The lifting mechanism achieves vertical lifting of the carrier plate through the coaxial fixation of the drive motor and the lead screw and the threaded transmission of the connecting block, which supports automatic feeding and precise positioning of batch materials, improves feeding efficiency and meets the needs of continuous production. 3. The gripping component achieves flexible horizontal layout and precise positioning of the suction nozzle through the sliding locking structure of the limiting groove and the connecting tube, adapting to the adsorption and gripping needs of materials of different sizes or shapes, while ensuring stable and reliable adsorption force. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0024] Figure 2This is a schematic diagram of the lifting mechanism in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the transfer mechanism and conveying mechanism in the embodiments of this application.

[0026] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0027] Explanation of reference numerals in the attached drawings: 1. Lifting mechanism; 11. Carrier plate; 111. Limiting sliding groove; 112. Positioning bar; 12. Drive motor; 13. Lead screw; 14. Connecting block; 15. Fixed baffle; 16. Linear guide rail; 2. Gripping assembly; 21. Suction nozzle; 22. Connecting pipe; 23. Limiting bar; 231. Limiting groove; 24. Nut; 3. Motion assembly; 31. Linear module; 32. Drive cylinder; 4. Conveying mechanism; 41. Base plate; 42. Roller; 43. Closed-loop conveyor belt. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses an automatic feeding device for a hot stamping machine. (Refer to...) Figure 1 An automatic feeding device for a hot stamping machine includes a frame, on which a lifting mechanism 1, a transfer mechanism, and a conveying mechanism 4 are provided. The lifting mechanism 1, the transfer mechanism, and the conveying mechanism 4 are all installed on the frame. The transfer mechanism is located between the lifting mechanism 1 and the conveying mechanism 4 and is mounted above the conveying mechanism 4.

[0030] The material is placed on the lifting mechanism 1, which lifts the material from its initial position to a height that matches the height of the conveying mechanism 4 and connects it with the transfer mechanism. The transfer mechanism transfers the material to the conveying mechanism 4, and the conveying mechanism 4 then transports the material into the hot stamping machine for processing.

[0031] Reference Figure 2 Relatedly, the lifting mechanism 1 includes a carrier plate 11, a drive motor 12, a lead screw 13, and a connecting block 14. The carrier plate 11 is slidably mounted on the frame in a vertical direction and is horizontally mounted. The drive motor 12 is mounted below the carrier plate 11, and the output shaft of the drive motor 12 is vertically upward. The output shaft of the drive motor 12 is coaxially fixed with one end of the lead screw 13, and the other end of the lead screw 13 is rotatably supported on the frame. The connecting block 14 is fixedly connected to the side wall of the carrier plate 11 near the lead screw 13, and the lead screw 13 and the connecting block 14 are threaded together.

[0032] Specifically, linear guide rails 16 are symmetrically fixed on both sides of the frame near the drive motor 12. The linear guide rails 16 are arranged in the vertical direction, and the carrier plate 11 is slidably arranged on the linear guide rails 16.

[0033] Furthermore, when the drive motor 12 is powered on, the output shaft of the drive motor 12 rotates, driving the lead screw 13 to rotate synchronously. When the lead screw 13 rotates, the interaction between the lead screw 13 and the connecting block 14 through the threaded engagement causes the connecting block 14 to reciprocate linearly along the axis of the lead screw 13, while simultaneously driving the carrier plate 11 to move up and down, realizing the vertical lifting and precise feeding of materials. The carrier plate 11 can simultaneously carry multiple materials in batches, improving feeding efficiency and meeting the needs of continuous production.

[0034] Furthermore, the linear guide 16 further defines the motion trajectory of the carrier plate 11, so that the carrier plate 11 can only move along the axial direction of the lead screw 13, thereby providing motion stability for the carrier plate 11.

[0035] In addition, the carrier plate 11 is symmetrically provided with two limit sliding grooves 111 on its surface. The limit sliding grooves 111 are elongated grooves and are directly formed on the surface of the carrier plate 11. At the same time, a number of positioning strips 112 are correspondingly slidably arranged on the carrier plate 11 along the horizontal direction. The number of positioning strips 112 matches the number of limit sliding grooves 111 one by one. The width of each limit sliding groove 111 matches the width of the positioning strip 112, ensuring that the positioning strip 112 can be smoothly slid and installed in the limit sliding groove 111. The positioning strip 112 is perpendicular to the carrier plate 11 and can slide freely in the length direction of the limit sliding groove 111.

[0036] Furthermore, the limiting sliding groove 111 of the carrier plate 11 is slidably connected to the positioning strip 112. By flexibly adjusting the position of the positioning strip 112, the material is placed on the carrier plate 11, and the positioning strip 112 abuts against the material to position the material, thereby constraining the size and shape of the material. The positioning strip 112 can slide along the length of the limiting sliding groove 111 to adjust the limiting range according to the specifications and size requirements of different materials.

[0037] Meanwhile, the lifting mechanism 1 also includes a fixed baffle 15, which is placed on the upper surface of the carrier plate 11. The fixed baffle 15 fits against the edge of the material to form a limiting boundary, providing physical obstruction for the material and reducing the probability of the material slipping due to vibration or accidental contact.

[0038] In addition, the height of the fixed baffle 15 is always higher than the stacking height of the materials, which can relatively block the various heights formed by the stacking of different batches of materials, ensuring the stability of the materials when they are lifted.

[0039] Reference Figure 3 On the other hand, the lifting mechanism 1 lifts the material and connects it with the transfer mechanism. The transfer mechanism includes a gripping component 2 and a motion component 3. After the gripping component 2 grips the material, the motion component 3 drives the material to be transferred to the conveying mechanism 4.

[0040] Reference Figure 4 Specifically, the gripping component 2 includes a suction nozzle 21, a connecting tube 22, and a limiting strip 23. There are six suction nozzles 21. A connecting tube 22 is fixed on the top of the suction nozzle 21. The connecting tube 22 is connected to the suction nozzle 21. A nut 24 is sleeved on the outside of the connecting tube 22. The outer wall of the connecting tube 22 is threaded. The outer dimensions of the connecting tube 22 match the inner dimensions of the nut 24. The limiting strip 23 is provided with a limiting groove 231. The width of the limiting groove 231 matches the outer diameter of the connecting tube 22, ensuring that the connecting tube 22 can be inserted vertically into the limiting groove 231. Each connecting tube 22 is fixed to the limiting strip 23 by a double nut 24 structure.

[0041] Specifically, one nut 24 is tightened from the upper end of the connecting tube 22 to abut against the upper surface of the limiting strip 23, and the second nut 24 is tightened from the lower end to abut against the lower surface of the limiting strip 23. The locking method of the first nut 24 and the second nut 24 clamping each other from the top and bottom allows the suction nozzle 21 to be freely adjusted and arranged in the horizontal direction, which can meet the gripping needs of materials of different sizes or shapes. When the suction nozzle 21 is adjusted to the target position, the connecting tube 22 can be firmly locked in the limiting groove 231 by the thread engagement of the first nut 24 and the second nut 24 with the connecting tube 22, thereby ensuring that the position of the suction nozzle 21 is fixed.

[0042] Meanwhile, the suction nozzle 21 achieves adsorption function through an external air supply device. The output end of the air supply device is connected to the connecting pipe 22 above the suction nozzle 21, thereby providing a stable adsorption force for the suction nozzle 21 and ensuring that the material remains firmly adsorbed during the gripping process.

[0043] On the other hand, the motion component 3 includes a linear module 31 and a drive cylinder 32. The piston rod of the drive cylinder 32 is set vertically downward. The piston rod of the drive cylinder 32 is vertically fixed to the gripping component 2 with the limiting bar 23. The linear module 31 is set in the horizontal direction. The drive cylinder 32 is vertically fixed to the sliding seat of the linear module 31.

[0044] Specifically, the drive cylinder 32 is a vertically driven component. A support frame is provided on the frame, and the linear module 31 is installed on the support frame and arranged in the horizontal direction. The linear module 31 is connected between the lifting mechanism 1 and the conveying mechanism 4. The drive cylinder 32 is vertically fixed on the sliding seat of the linear module 31. Under the drive of the movable seat of the linear module 31, the drive cylinder 32 can move in the horizontal direction.

[0045] Correspondingly, the piston rod of the drive cylinder 32 is installed in a vertically downward direction. The piston rod of the drive cylinder 32 is vertically fixed to the limit strip 23. When the drive cylinder 32 drives the suction nozzle 21 to move and grab the material placed on the carrier plate 11, the linear module 31 drives the sliding seat to move. The drive cylinder 32, the suction nozzle 21 and the grabbed material move horizontally in sync, thereby realizing the movement of the grabbing component 2 and the grabbed material in both vertical and horizontal directions, and transferring the grabbed material to the conveying mechanism 4.

[0046] In addition, the grabbed material is transferred to the conveying mechanism 4, which then transfers the material into the hot stamping machine.

[0047] Specifically, the conveying mechanism 4 includes a control motor, a base plate 41, rollers 42, and a closed-loop conveyor belt 43. The base plate 41 is horizontally arranged and fixed on the frame. Two rollers 42 are provided, which are respectively arranged on both sides of the base plate 41. The rollers 42 are rotatably supported on the frame. The control motor is installed inside the frame, and the output shaft of the control motor is coaxially fixed with one of the rollers 42. The closed-loop conveyor belt 43 is sleeved on the two rollers 42, and the base plate 41 is located inside the closed-loop conveyor belt 43.

[0048] Specifically, the base plate 41 serves as a supporting component. The width of the base plate 41 matches the width of the machine frame, allowing the base plate 41 to be horizontally fixed to the side wall inside the machine frame. The length of the base plate 41 is less than the length of the machine frame, leaving space on both sides of the base plate 41. Two rollers 42 are symmetrically installed in the space on both sides of the base plate 41. The two ends of the two rollers 42 are slidably installed on the side wall inside the machine frame. The control motor is built into the machine frame, and the output shaft of the control motor is coaxially rotated with one of the rollers 42, forming a power input structure.

[0049] Furthermore, the closed-loop conveyor belt 43 is fitted around the two rollers 42 in a ring structure. The inner surface of the closed-loop conveyor belt 43 forms a friction surface with the rollers 42. The outer surface of the closed-loop conveyor belt 43, together with the base plate 41, forms a material carrying platform. The base plate 41 is located in the internal space of the closed-loop conveyor belt 43. The upper surface of the base plate 41 provides support for the conveyor belt, ensuring that the conveyor belt maintains a straight trajectory during movement. When the control motor drives the rollers 42 to rotate, the power is transmitted to the other roller 42 through the friction between the rollers 42 and the conveyor belt, driving the closed-loop conveyor belt 43 to rotate continuously. This realizes the directional conveying of materials on the frame to the inside of the hot stamping machine. The base plate 41 further improves the stability of the conveyor belt and reduces the probability of material slippage.

[0050] The implementation principle of the automatic feeding device for a hot stamping machine in this application embodiment is as follows: This application embodiment discloses an automatic feeding device for a hot stamping machine, comprising a lifting mechanism, a transfer mechanism, and a conveying mechanism. Material is placed on the lifting mechanism, which lifts the material from its initial position to a height matching that of the conveying mechanism, connecting it to the transfer mechanism. The transfer mechanism then transfers the material to the conveying mechanism, which in turn transports the material into the hot stamping machine for processing. The material is placed on the carrier plate, and the drive motor drives the carrier plate to move up and down along a vertical linear guide rail through the threaded engagement of the lead screw and connecting block. The linear guide rail ensures the stability of the carrier plate's vertical movement, enabling the material to be lifted from its initial position to a height matching that of the conveying mechanism, and then connected to the transfer mechanism.

[0051] The carrier plate has a limiting sliding groove on its surface. Several positioning strips are correspondingly slidably installed on the carrier plate in the horizontal direction. The number of positioning strips matches the number of limiting sliding grooves. The width of each limiting sliding groove matches the width of the positioning strip. By adjusting the position of the positioning strips, materials of different sizes or shapes can be flexibly adapted, and the materials can be fixed and positioned. The fixing baffle is perpendicular to the edge of the material to prevent the material from slipping due to vibration or external force during the lifting process. The height of the fixing baffle is designed to be higher than the stacking height of the material, which further ensures the stability of the material, improves the feeding efficiency, and meets the needs of continuous production.

[0052] The transfer mechanism consists of a gripping component and a motion component, which work together to grip and horizontally transfer materials.

[0053] The gripping assembly includes a suction nozzle, a connecting tube, and a limiting strip. The suction nozzle is connected to the air supply equipment through the connecting tube and uses suction force to firmly grip the material. The connecting tube of the suction nozzle is fixed in the limiting groove of the limiting strip by double nuts. It can be freely adjusted and arranged in the horizontal direction to adapt to materials with different hot stamping requirements. After the suction nozzle is adjusted, it is clamped and fixed by double nuts to ensure the stability of the suction nozzle position.

[0054] The motion component includes a linear module and a drive cylinder. The piston rod of the drive cylinder extends downward and is fixed with a limit bar. The vertical lifting and lowering of the suction nozzle is achieved by extending and retracting the piston rod, thus completing the gripping and release of materials.

[0055] The drive cylinder is fixed on the sliding seat of the linear module. The linear module drives the sliding seat to move horizontally, which in turn causes the gripping component and the material to move horizontally together, transferring the material from the lifting mechanism to the conveying mechanism.

[0056] After the material is transferred to the conveying mechanism, it is finally transported to the hot stamping machine through the closed-loop conveyor belt. Rollers are set on both sides of the closed-loop conveyor belt. The control motor drives one of the rollers to rotate, which drives the closed-loop conveyor belt and the other roller to circulate. The base plate serves as a support platform and is installed inside the conveyor belt to ensure that the conveyor belt runs straight and stable, reducing the risk of material slippage.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic feeding device for a hot stamping machine, characterized in that, The system includes a frame on which a lifting mechanism (1), a transfer mechanism, and a conveying mechanism (4) are mounted. The lifting mechanism (1), the transfer mechanism, and the conveying mechanism (4) are all mounted on the frame. The material is placed on the lifting mechanism (1), which lifts the material and connects it to the transfer mechanism. The transfer mechanism is located between the lifting mechanism (1) and the conveying mechanism (4) and is mounted above the conveying mechanism (4). The transfer mechanism transfers the material to the conveying mechanism (4), and the conveying mechanism (4) transports the material to a designated working area.

2. The automatic feeding device for a hot stamping machine according to claim 1, characterized in that, The lifting mechanism (1) includes a carrier plate (11), a drive motor (12), a lead screw (13), and a connecting block (14). The carrier plate (11) is slidably mounted on the frame in the vertical direction. The drive motor (12) is located below the carrier plate (11). The output shaft of the drive motor (12) is coaxially fixed with the lead screw (13) and is mounted in the vertical direction. The connecting block (14) is fixedly connected to the side wall of the carrier plate (11). The lead screw (13) is threadedly engaged with the connecting block (14).

3. The automatic feeding device for a hot stamping machine according to claim 2, characterized in that, The carrier plate (11) is provided with a plurality of limiting sliding grooves (111) and positioning strips (112). The limiting sliding grooves (111) are formed on the surface of the carrier plate (11), and the positioning strips (112) are slidably disposed in the limiting sliding grooves (111) along the length direction of the limiting sliding grooves (111). The positioning strips (112) are perpendicular to the carrier plate (11).

4. The automatic feeding device for a hot stamping machine according to claim 2, characterized in that, The lifting mechanism (1) also includes a fixed baffle (15) which is placed on the upper surface of the carrier plate (11).

5. The automatic feeding device for a hot stamping machine according to claim 1, characterized in that, The transfer mechanism includes a gripping component (2), which includes a suction nozzle (21), a connecting tube (22), and a limiting strip (23). There are several suction nozzles (21). The limiting strip (23) is provided with a limiting groove (231). The connecting tube (22) passes through the limiting groove (231) and is fixedly connected to the suction nozzle (21). The connecting tube (22) slides horizontally within the limiting groove (231) and can lock with the limiting strip (23). The suction nozzle (21) is externally connected to an air supply device, which is fixedly connected to the connecting tube (22).

6. The automatic feeding device for a hot stamping machine according to claim 5, characterized in that, The transfer mechanism also includes a motion component (3), which includes a drive cylinder (32). The piston rod of the drive cylinder (32) is vertically downward and is fixed vertically to the limiting strip (23).

7. The automatic feeding device for a hot stamping machine according to claim 6, characterized in that, The motion component (3) further includes a linear module (31), which is arranged in a horizontal direction, and the drive cylinder (32) is vertically fixed on the sliding seat of the linear module (31).

8. The automatic feeding device for a hot stamping machine according to claim 1, characterized in that, The conveying mechanism (4) includes a control motor, a base plate (41), rollers (42), and a closed-loop conveyor belt (43). The base plate (41) is horizontally arranged and fixed on the frame. There are two rollers (42), which are respectively arranged on both sides of the base plate (41). The rollers (42) are rotatably supported on the frame. The control motor is installed inside the frame. The output shaft of the control motor is coaxially fixed with one of the rollers (42). The closed-loop conveyor belt (43) is sleeved on the two rollers (42). The base plate (41) is located inside the closed-loop conveyor belt (43).

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