A kind of paper shell production gluing equipment

Abstract

The utility model discloses a kind of gluing equipment for paper shell production, belong to paper shell production technical field, its technical scheme main points include fixed frame, the inside movable setting of fixed frame has rubber antiskid conveyor belt, the top of rubber antiskid conveyor belt is provided with storage tank, the bottom of storage tank is provided with gluing mechanism, the quantity of gluing mechanism is several, the top of storage tank is provided with glue outlet mechanism, the both sides of fixed frame are provided with electric telescopic rod;Solved the structure of gluing when part of paper shell production in existing, it is inconvenient to adjust gluing width according to different batches, different width paper shell, when gluing work width is greater than paper shell width, glue can flow to paper shell outside, cause glue waste, increase production cost, simultaneously also possibly pollute production environment, and if gluing work width is less than paper shell width, then it can lead to gluing not comprehensive, affect paper shell adhesion quality and strength problem.

Description

Technical Field

[0001] This utility model relates to the field of paper shell production technology, and in particular to a gluing device for paper shell production. Background Technology

[0002] In paperboard production, gluing is the core process for bonding and fixing the structure between paperboard layers. Essentially, it involves using specific equipment to apply adhesive evenly and precisely to the surface of the paperboard, followed by subsequent processes such as pressing and curing. This allows the originally independent corrugated core paper to be spliced ​​with the face paper and cardboard to form a strong and stable whole, ultimately ensuring the strength, stiffness and performance of the paperboard.

[0003] Existing paperboard gluing equipment includes pressure rollers and glue rollers. The paperboard is glued through the gap between the pressure rollers and glue rollers. Due to the large differences in thickness between different paperboards, the paperboard gluing equipment can only glu paperboards of the same thickness, which has great limitations.

[0004] An existing patent (publication number: CN217940699U) discloses a cardboard coating device that drives a glue roller and a coating roller to rotate synchronously via a drive device. While the glue on the glue roller is transferred to the coating roller, excess glue on the glue roller can be squeezed out, avoiding excessive glue coating on the cardboard and thus saving glue. When coating thicker cardboard, a lifting device is activated to raise the support frame, increasing the distance between the limiting roller and the coating roller, thereby enabling the coating of cardboard of different thicknesses.

[0005] To address the aforementioned issues, existing patents offer solutions. However, the existing structure for applying glue during the production of some cardboard boxes makes it inconvenient to adjust the glue application width according to different batches and cardboard boxes of different widths. When the glue application width is greater than the width of the cardboard box, the glue will flow to the outside of the cardboard box, resulting in glue waste, increased production costs, and potential pollution of the production environment. On the other hand, if the glue application width is less than the width of the cardboard box, it will lead to incomplete glue application, affecting the bonding quality and strength of the cardboard box.

[0006] Therefore, a gluing device for paperboard production is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a gluing device for paperboard production, which can solve the problems of existing gluing structures in some paperboard production processes, which are inconvenient to adjust the gluing width according to different batches and paperboards of different widths. When the gluing working width is greater than the width of the paperboard, the glue will flow to the outside of the paperboard, resulting in glue waste, increased production costs, and potential pollution of the production environment. On the other hand, if the gluing working width is less than the width of the paperboard, it will lead to incomplete gluing, affecting the bonding quality and strength of the paperboard.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a gluing device for cardboard production, comprising a fixed frame, a rubber anti-slip conveyor belt movably arranged inside the fixed frame, a storage box arranged on the top of the rubber anti-slip conveyor belt, a gluing mechanism arranged at the bottom of the storage box, and several gluing mechanisms; a glue dispensing mechanism arranged on the top of the storage box; and electric telescopic rods arranged on both sides of the fixed frame; the gluing mechanism includes a cover, a fixed cylinder, a perforated plate, and several brushes; the surface of the cover is threadedly connected to the inner wall of the fixed cylinder; the top of the brushes is fixedly connected to the bottom of the perforated plate; and the perforated plate is fixedly connected to the inner wall of the fixed cylinder.

[0009] Preferably, the bottom of the inner wall of the storage box is provided with a through hole for use with the fixing cylinder, and the surface of the fixing cylinder is fixedly connected to the inner wall of the through hole.

[0010] Preferably, a first fixing plate is fixedly connected to both sides of the storage box, the top of the telescopic end of the electric telescopic rod is fixedly connected to the bottom of the first fixing plate, a second fixing plate is fixedly connected to both sides of the fixing frame, and the bottom of the electric telescopic rod is fixedly connected to the top of the second fixing plate.

[0011] Preferably, both sides of the front of the storage box are fitted with viewing windows.

[0012] Preferably, the dispensing mechanism includes a box cover, a sealing ring, and an air pump. The bottom of the air pump output end is fixedly connected to the top of the box cover, the top of the sealing ring is fixedly connected to the bottom of the box cover, the surface of the box cover is in contact with the inner wall of the storage box, and the bottom of the sealing ring is in contact with the top of the storage box.

[0013] Preferably, a first limiting block is fixedly connected to the surface of the box lid, and the number of the first limiting blocks is several and symmetrically distributed on the surface of the box lid. A second limiting block that cooperates with the first limiting block is fixedly connected to the surface of the storage box. A limiting button is provided on the top of the first limiting block, and the bottom of the limiting button passes through the first limiting block and is threadedly connected to the inside of the second limiting block. Handles are fixedly connected to both sides of the top of the box lid.

[0014] Preferably, an injection pipe is fixedly connected to the top of the box cover, and a pipe cap is provided on the top of the injection pipe, with the surface of the pipe cap threadedly connected to the inner wall of the injection pipe.

[0015] Preferably, the front and rear sides of the inner wall of the fixed frame are rotatably connected to rotating rollers, the rubber anti-slip conveyor belt is movably sleeved between the surfaces of the two rotating rollers, a reduction motor is fixedly connected to the front side of the right side of the fixed frame, the left side of the output shaft of the reduction motor passes through the fixed frame and is fixedly connected to the surface of the front rotating roller, the surface of the output shaft of the reduction motor is in movable contact with the interior of the fixed frame, and support legs are fixedly connected to the four corners of the bottom of the fixed frame.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application sets up a gluing mechanism. The fixed cylinder is securely connected to the storage box through a through hole at the bottom of the storage box. The perforated plate is fixed to the inner wall of the fixed cylinder, and the brush bristles are connected to the bottom of the perforated plate. During operation, the gluing width range can be adjusted by rotating the threaded cover connected to the inner wall of the fixed cylinder and removing the corresponding number of covers according to the width of the cardboard to be glued. This accurately adapts to the gluing needs of cardboards of different widths. During the gluing stage, the glue in the storage box flows in from the top of the fixed cylinder with the cover open under pressure. It then evenly penetrates the brush bristles through the perforated plate. As the cardboard moves on the conveyor belt, the brush bristles evenly apply the glue to the top of the cardboard, ensuring the gluing effect. When no gluing is needed, because there is no pressure in the storage box, the glue will not leak from the perforated plate due to surface tension, effectively avoiding glue waste. At the same time, by adjusting the contact state between the brush bristles and the cardboard, the uniformity of gluing for cardboards of different thicknesses is ensured. This solves the problems of inconvenient adjustment of gluing width, easy waste, or incomplete gluing in existing gluing structures.

[0018] 2. This application features a glue dispensing mechanism. The air pump output is fixedly connected to the top of the tank lid, and a sealing ring is connected to the bottom of the tank lid and in close contact with the top of the storage tank. When adding glue, the tank lid can be opened and the glue poured in directly. After closing, the first limiting block on the surface of the tank lid, the second limiting block on the surface of the storage tank, and the threaded engagement of the limiting button ensure the tank lid is securely positioned. At the same time, the sealing ring ensures the sealing performance of the storage tank, preventing air leakage or glue evaporation and pollution during pressurization. Subsequent glue replenishment does not require disassembling the tank lid; simply open the threaded cap on the top of the injection pipe to add glue through the injection pipe. The operation is convenient. During the glue application process, the air pump pressurizes the storage tank, providing stable delivery power for the glue, allowing it to flow smoothly to the glue application mechanism and ensuring continuous and stable glue application. Furthermore, when the air pump stops working, the storage tank is depressurized, preventing glue leakage. This not only ensures glue application efficiency but also reduces glue waste and environmental pollution, providing a strong guarantee for glue application quality. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the adhesive coating equipment for paperboard production according to this utility model;

[0020] Figure 2 This is a three-dimensional connection diagram of the storage box and the first fixing plate in this utility model;

[0021] Figure 3 This is a three-dimensional exploded view of the cover and the fixing cylinder in this utility model;

[0022] Figure 4 This is a perspective sectional view of the storage box in this utility model;

[0023] Figure 5 This is a three-dimensional connection diagram of the glue dispensing mechanism in this utility model;

[0024] Figure 6 This utility model Figure 5 A magnified view of a section at point A in the middle;

[0025] Figure 7 This is a three-dimensional exploded view of the rubber anti-slip conveyor belt and the rotating roller in this utility model.

[0026] In the diagram, 1. Fixed frame; 2. Rubber anti-slip conveyor belt; 3. Glue dispensing mechanism; 301. Box cover; 302. Sealing ring; 303. Air pump; 4. Storage box; 5. Electric telescopic rod; 6. Gear motor; 7. Support leg; 8. Glue application mechanism; 801. Baffle cover; 802. Fixed cylinder; 803. Hollow plate; 804. Brush bristles; 9. Viewing window; 10. First fixed plate; 11. Second limiting block; 12. Through hole; 13. Handle; 14. Limit button; 15. First limiting block; 16. Pipe cover; 17. Injection pipe; 18. Second fixed plate; 19. Rotary roller. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-7 The present invention provides the following technical solution:

[0029] A gluing device for paperboard production includes a fixed frame 1, a rubber anti-slip conveyor belt 2 movably arranged inside the fixed frame 1, a storage box 4 arranged on the top of the rubber anti-slip conveyor belt 2, a gluing mechanism 8 arranged at the bottom of the storage box 4, and several gluing mechanisms 8. A glue dispensing mechanism 3 is arranged on the top of the storage box 4. Electric telescopic rods 5 are arranged on both sides of the fixed frame 1. The gluing mechanism 8 includes a cover 801, a fixed cylinder 802, a perforated plate 803, and several brushes 804. The surface of the cover 801 is threadedly connected to the inner wall of the fixed cylinder 802. The top of the brushes 804 is fixedly connected to the bottom of the perforated plate 803. The perforated plate 803 is fixedly connected to the inner wall of the fixed cylinder 802.

[0030] In this embodiment: The gluing width is determined by rotating the cover 801 on the inner wall of the fixed cylinder 802 in the gluing mechanism 8 according to the width of the cardboard to be coated, and removing a corresponding number of covers 801. Glue is added to the storage box 4 by opening the box cover 301. After closing the box cover 301, it is limited by the limit button 14, the first limit block 15, and the second limit block 11. The sealing ring 302 ensures the storage box 4 is sealed. Glue can be added through the injection pipe 17. Based on the cardboard thickness, the electric telescopic rod 5 is controlled to move the storage box 4 up and down. The brush bristles 804 are adjusted to a suitable height. Then, the reduction motor 6 is started to make the rubber anti-slip conveyor belt 2 run. The cardboard is then placed on top of the rubber anti-slip conveyor belt 2 and conveyed backward. The air pump 303 is started to pressurize the storage tank 4. The glue comes into contact with the brush bristles 804 through the fixed cylinder 802 and the perforated plate 803 after the cover 801 is opened, and is applied to the moving cardboard. The viewing window 9 makes it easy to observe the amount of glue. The support leg 7 provides support. The glue application width can be adjusted by controlling the number of times the cover 801 is opened. This solves the problem that the existing structure for applying glue during the production of some cardboard is inconvenient to adjust the glue application width according to different batches and cardboard widths. When the glue application width is greater than the width of the cardboard, the glue will flow to the outside of the cardboard, resulting in glue waste, increased production costs, and possible pollution of the production environment. If the glue application width is less than the width of the cardboard, it will lead to incomplete glue application, affecting the bonding quality and strength of the cardboard.

[0031] Specifically, such as Figure 3 and Figure 4 As shown, the bottom of the inner wall of the storage box 4 is provided with a through hole 12 that is used in conjunction with the fixing cylinder 802, and the surface of the fixing cylinder 802 is fixedly connected to the inner wall of the through hole 12.

[0032] Specifically, such as Figure 2 and Figure 7 As shown, the storage box 4 is fixedly connected to both sides of the first fixing plate 10, the top of the telescopic end of the electric telescopic rod 5 is fixedly connected to the bottom of the first fixing plate 10, the fixed frame 1 is fixedly connected to both sides of the second fixing plate 18, and the bottom of the electric telescopic rod 5 is fixedly connected to the top of the second fixing plate 18.

[0033] Specifically, such as Figure 2 As shown, both sides of the front of the storage box 4 are fitted with viewing windows 9.

[0034] In this embodiment: the through hole 12 at the bottom of the inner wall of the storage box 4 is fixed with the fixing cylinder 802 to ensure that the fixing cylinder 802 is installed firmly. The electric telescopic rod 5 is connected to the storage box 4 and the fixing frame 1 through the first fixing plate 10 and the second fixing plate 18 respectively. It can stably drive the storage box 4 to rise and fall, accurately adjust the contact distance between the brush bristles 804 and the cardboard, adapt to the glue coating needs of cardboard of different thicknesses, and the viewing window 9 on the front side of the storage box 4 allows the staff to observe the glue level in the box in real time, replenish glue in time, avoid glue coating interruption due to insufficient glue, and improve production continuity.

[0035] Specifically, such as Figure 5 As shown, the dispensing mechanism 3 includes a box cover 301, a sealing ring 302, and an air pump 303. The bottom of the output end of the air pump 303 is fixedly connected to the top of the box cover 301, the top of the sealing ring 302 is fixedly connected to the bottom of the box cover 301, the surface of the box cover 301 is in contact with the inner wall of the storage box 4, and the bottom of the sealing ring 302 is in contact with the top of the storage box 4.

[0036] Specifically, such as Figure 4 and Figure 6 As shown, a first limiting block 15 is fixedly connected to the surface of the box cover 301. There are several first limiting blocks 15 and they are symmetrically distributed on the surface of the box cover 301. A second limiting block 11 that works with the first limiting block 15 is fixedly connected to the surface of the storage box 4. A limiting button 14 is provided on the top of the first limiting block 15. The bottom of the limiting button 14 passes through the first limiting block 15 and is threadedly connected to the inside of the second limiting block 11. Handles 13 are fixedly connected to both sides of the top of the box cover 301.

[0037] In this embodiment: the lid 301 of the dispensing mechanism 3 cooperates with the sealing ring 302 to tightly seal the storage box 4, preventing air leakage when the air pump 303 pressurizes and affecting the delivery of glue, and also preventing glue from evaporating or becoming contaminated. The air pump 303 is connected to the lid 301 and can stably pressurize the storage box 4 to ensure that the glue flows out evenly. The first limiting block 15, the second limiting block 11 and the limiting button 14 cooperate to firmly fix the lid 301 and prevent the lid 301 from loosening during the glue application process. The handle 13 makes it convenient for workers to load and unload the lid 301, improving operating efficiency.

[0038] Specifically, such as Figure 6 As shown, an injection pipe 17 is fixedly connected to the top of the box cover 301, and a pipe cap 16 is provided on the top of the injection pipe 17. The surface of the pipe cap 16 is threadedly connected to the inner wall of the injection pipe 17.

[0039] Specifically, such as Figure 1As shown, the front and rear sides of the inner wall of the fixed frame 1 are rotatably connected to the rotating rollers 19. The rubber anti-slip conveyor belt 2 is movably sleeved between the surfaces of the two rotating rollers 19. The front right side of the fixed frame 1 is fixedly connected to the reduction motor 6. The left side of the output shaft of the reduction motor 6 passes through the fixed frame 1 and is fixedly connected to the surface of the front rotating roller 19. The surface of the output shaft of the reduction motor 6 is in movable contact with the interior of the fixed frame 1. The four corners of the bottom of the fixed frame 1 are fixedly connected to the support legs 7.

[0040] In this embodiment: the injection pipe 17 at the top of the box cover 301 cooperates with the pipe cover 16, so that glue can be added without disassembling the box cover 301, reducing operation steps and avoiding glue spillage and pollution. The rotating roller 19 inside the fixed frame 1 cooperates with the rubber anti-slip conveyor belt 2, which can stably transport the cardboard under the drive of the reduction motor 6, ensuring that the cardboard moves smoothly when applying glue and improving the uniformity of glue application. The support legs 7 at the bottom of the fixed frame 1 can stably support the fixed frame 1 and ensure that the glue application operation is carried out stably.

[0041] Working principle: First, based on the width of the cardboard to be coated, rotate the threaded cover 801 on the inner wall of the coating mechanism 8, which is fixed to the inner wall of the through hole 12 at the bottom of the storage box 4, according to the width of the cardboard to be coated. Remove the corresponding number of covers 801 to determine the width range to be coated. Next, add the external adhesive to be used into the storage box 4 through the dispensing mechanism 3 at the top of the storage box 4. The dispensing mechanism 3 includes a box cover 301, a sealing ring 302, and an air pump 303. First, open the box cover 301, pour in the adhesive, and then close the box cover 301. At this time, several symmetrically distributed first limiting blocks 15 fixedly connected to the surface of the box cover 301 are aligned with the second limiting blocks 11 fixedly connected to the surface of the storage box 4. Then, the bottom of the limiting button 14 passes through the first limiting block 11. 5. It is connected to the internal thread of the second limiting block 11 to achieve the limiting and fixing of the box cover 301. At the same time, the top of the sealing ring 302 is fixedly connected to the bottom of the box cover 301, and the bottom contacts the top of the storage box 4 to ensure the sealing of the storage box 4. If glue needs to be added later, the pipe cap 16 connected to the top of the injection pipe 17 can be opened, and the glue can be added through the injection pipe 17. The injection pipe 17 is fixedly connected to the top of the box cover 301. Then, according to the thickness of the cardboard to be glued, the electric telescopic rod 5 on the top of the second fixing plate 18 fixedly connected to both sides of the fixing frame 1 is controlled to work. The top of the telescopic end of the electric telescopic rod 5 is fixedly connected to the bottom of the first fixing plate 10 fixedly connected to both sides of the storage box 4. By moving the telescopic end of the electric telescopic rod 5, the storage box 4 is moved up and down as a whole. The distance between the brush bristles 804 and the top of the rubber anti-slip conveyor belt 2 in the gluing mechanism 8 is adjusted until the brush bristles 804 can contact the top of the cardboard. Then, the reduction motor 6, which is fixedly connected to the front right side of the fixed frame 1, is controlled to rotate. The left side of the output shaft of the reduction motor 6 passes through the fixed frame 1 and is fixedly connected to the surface of the front roller 19 of the roller 19, which is rotatably connected to the front and rear sides of the inner wall of the fixed frame 1. The reduction motor 6 drives the roller 19 to rotate, causing the rubber anti-slip conveyor belt 2, which is movably sleeved between the surfaces of the two rollers 19, to rotate. Then, the cardboard to be glued is placed on top of the rubber anti-slip conveyor belt 2, and the cardboard is conveyed backward with the rubber anti-slip conveyor belt 2. At the same time, the air pump 303 is controlled to work. The bottom of the output end of the air pump 303 is fixedly connected to the top of the box cover 301, and the air pump 303... The storage tank 4 is pressurized with air, causing the glue inside to flow in from the top of the fixed cylinder 802 (with the cover 801 open) under pressure. The glue passes through the perforated plate 803 inside the fixed cylinder 802 and contacts the brush bristles 804 at the bottom of the perforated plate 803. As the cardboard moves backward on the rubber anti-slip conveyor belt 2, the brush bristles 804 evenly apply the glue to the top of the cardboard, completing the glue application. Throughout the process, the operator can observe the remaining amount of glue in the storage tank 4 through the viewing windows 9 embedded on both sides of the front. The support legs 7, fixedly connected to the four corners of the bottom of the fixed frame 1, provide support for the entire device. The application width can be controlled by opening different numbers of covers 801. When glue application is not needed, the air pump 303 is stopped.The storage box 4 is pressureless, and the glue will not leak from the perforated plate 803 due to surface tension. This solves the problem of inconvenience in adjusting the glue application width according to different batches and widths of cardboard during some cardboard production processes. When the glue application width is greater than the cardboard width, the glue will flow to the outside of the cardboard, causing glue waste, increasing production costs, and potentially polluting the production environment. Conversely, if the glue application width is less than the cardboard width, it will lead to incomplete glue application, affecting the bonding quality and strength of the cardboard. It should be noted that the electric telescopic rod 5, air pump 303, and geared motor 6 are all existing and mature technologies, all powered by an external power supply and controlled by an external controller. Furthermore, any content not described in detail in this specification belongs to existing technology known to those skilled in the art, and their basic mechanisms will not be elaborated here.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gluing device for paperboard production, comprising a fixed frame (1), characterized in that: The fixed frame (1) is equipped with a rubber anti-slip conveyor belt (2) inside. A storage box (4) is provided on the top of the rubber anti-slip conveyor belt (2). A glue application mechanism (8) is provided at the bottom of the storage box (4). There are several glue application mechanisms (8). A glue dispensing mechanism (3) is provided on the top of the storage box (4). Electric telescopic rods (5) are provided on both sides of the fixed frame (1). The glue application mechanism (8) includes a cover (801), a fixed cylinder (802), a hollow plate (803), and several brush bristles (804). The surface of the cover (801) is threaded to the inner wall of the fixed cylinder (802). The top of the brush bristles (804) is fixedly connected to the bottom of the hollow plate (803). The hollow plate (803) is fixedly connected to the inner wall of the fixed cylinder (802).

2. The gluing equipment for paperboard production according to claim 1, characterized in that: The bottom of the inner wall of the storage box (4) is provided with a through hole (12) that is used in conjunction with the fixing cylinder (802), and the surface of the fixing cylinder (802) is fixedly connected to the inner wall of the through hole (12).

3. The gluing equipment for paperboard production according to claim 1, characterized in that: The storage box (4) is fixedly connected to both sides by a first fixing plate (10), the top of the telescopic end of the electric telescopic rod (5) is fixedly connected to the bottom of the first fixing plate (10), the fixed frame (1) is fixedly connected to both sides by a second fixing plate (18), and the bottom of the electric telescopic rod (5) is fixedly connected to the top of the second fixing plate (18).

4. The gluing equipment for paperboard production according to claim 1, characterized in that: The storage box (4) has viewing windows (9) embedded on both sides of the front side.

5. The gluing equipment for paperboard production according to claim 1, characterized in that: The dispensing mechanism (3) includes a box cover (301), a sealing ring (302), and an air pump (303). The bottom of the output end of the air pump (303) is fixedly connected to the top of the box cover (301), the top of the sealing ring (302) is fixedly connected to the bottom of the box cover (301), the surface of the box cover (301) is in contact with the inner wall of the storage box (4), and the bottom of the sealing ring (302) is in contact with the top of the storage box (4).

6. The gluing equipment for paperboard production according to claim 5, characterized in that: A first limiting block (15) is fixedly connected to the surface of the box cover (301). There are several first limiting blocks (15) symmetrically distributed on the surface of the box cover (301). A second limiting block (11) that cooperates with the first limiting block (15) is fixedly connected to the surface of the storage box (4). A limiting button (14) is provided on the top of the first limiting block (15). The bottom of the limiting button (14) passes through the first limiting block (15) and is threadedly connected to the inside of the second limiting block (11). Handles (13) are fixedly connected to both sides of the top of the box cover (301).

7. The gluing equipment for paperboard production according to claim 6, characterized in that: An injection tube (17) is fixedly connected to the top of the box cover (301), and a tube cap (16) is provided on the top of the injection tube (17). The surface of the tube cap (16) is threadedly connected to the inner wall of the injection tube (17).

8. The gluing equipment for paperboard production according to claim 1, characterized in that: The front and rear sides of the inner wall of the fixed frame (1) are rotatably connected to rollers (19). The rubber anti-slip conveyor belt (2) is movably sleeved between the surfaces of the two rollers (19). The front right side of the fixed frame (1) is fixedly connected to a reduction motor (6). The left side of the output shaft of the reduction motor (6) passes through the fixed frame (1) and is fixedly connected to the surface of the front roller (19). The surface of the output shaft of the reduction motor (6) is in movable contact with the interior of the fixed frame (1). The four corners of the bottom of the fixed frame (1) are fixedly connected to support legs (7).

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