A woven cloth production cutting device

Abstract

This utility model provides a cutting device for woven fabric production, relating to the field of woven fabric cutting technology. It includes a cutting mechanism mounted on a conveyor belt for cutting woven fabric. The conveyor belt transports the woven fabric. The cutting mechanism includes a lifting assembly, a rotating rod, a telescopic assembly, a positioning assembly, cutting shears, and a driving assembly. The rotating rod is arranged laterally above the conveyor belt via the lifting assembly. The positioning assembly is mounted on the side of the rotating rod via the telescopic assembly and is used to position the woven fabric for cutting on the conveyor belt. The cutting shears are mounted on the positioning assembly and are used to cut the positioned woven fabric. The driving assembly controls the conveyor belt to transport the woven fabric and controls the rotating rod to rotate around its axis, ensuring that the conveyor belt's speed of transporting the woven fabric matches the speed at which the cutting shears rotate around the rotating rod. This utility model improves the cutting efficiency of woven fabric and ensures the cutting quality of the woven fabric.

Description

Technical Field

[0001] This utility model relates to the field of woven fabric cutting technology, specifically a woven fabric production cutting device. Background Technology

[0002] With the development of society and the improvement of people's living standards, more and more woven products are appearing in people's lives. In order to meet people's high demand for daily use, more and more items made of cotton and linen woven fabrics are appearing in people's lives. However, when making finished products, cotton and linen woven fabrics need to be cut into larger areas, so cotton and linen woven fabric production cutting devices are needed to facilitate the subsequent production of cotton and linen woven fabrics.

[0003] In the field of woven fabric production, cutting is a crucial post-processing step, and its quality and efficiency directly affect the final quality of the woven fabric and production efficiency. Currently, traditional woven fabric cutting methods have many problems:

[0004] 1. Low cutting accuracy: Traditional cutting equipment is not precise enough in positioning the woven fabric for cutting. It is easy to cause inaccurate cutting size due to positioning deviation, which affects the consistency of woven fabric product specifications, reduces product quality, and cannot meet the application scenarios with high requirements for dimensional accuracy, such as some precision packaging, high-end clothing accessories and other fields.

[0005] 2. Low cutting efficiency: Some cutting devices are complicated to operate, have slow cutting speeds, and are inconvenient to adjust when cutting woven fabrics of different widths. They require a lot of time and manpower for equipment debugging, resulting in low production efficiency, making it difficult to meet the needs of large-scale production and increasing production costs.

[0006] 3. Unstable cutting quality: During the cutting process, due to the lack of an effective buffer and positioning mechanism, the cutting scissors may produce problems such as rough edges and tears when cutting woven fabric due to uneven force or movement of the woven fabric, which will affect the cutting quality and reduce the aesthetics and practicality of the product.

[0007] 4. Poor equipment adaptability: Different specifications and materials of woven fabrics have different requirements for cutting equipment. Traditional cutting equipment is often difficult to adapt to the cutting needs of various woven fabrics and has poor versatility. Enterprises need to purchase a variety of equipment to meet different production needs, which increases equipment investment costs. Utility Model Content

[0008] To address the aforementioned problems, this application provides a cutting device for woven fabric production.

[0009] To achieve the above objectives, this application provides the following technical solution: a woven fabric production and cutting device, comprising a cutting mechanism disposed on a conveyor belt for cutting the woven fabric. The conveyor belt is used to transport the woven fabric. The cutting mechanism includes a lifting component, a rotating rod, a telescopic component, a positioning component, a cutting shear, and a driving component. The rotating rod is disposed above the conveyor belt in a transverse arrangement via the lifting component. The positioning component is disposed on the side of the rotating rod via the telescopic component for positioning the cutting position of the woven fabric on the conveyor belt. The cutting shear is disposed on the positioning component and is used to cut the positioned woven fabric. The driving component controls the conveyor belt to transport the woven fabric and controls the rotating rod to rotate around the axis, and the conveying speed of the conveyor belt to transport the woven fabric is consistent with the rotation speed of the cutting shear around the rotating rod.

[0010] Preferably, the positioning component includes a first positioning block, a second positioning block, and an elastic element. The first positioning block is fixedly disposed on the telescopic component, and a cutting scissor is fixedly disposed on the end of the first positioning block away from the telescopic component. The second positioning block is disposed parallel to the end of the first positioning block away from the telescopic component, and the second positioning block is fitted onto the cutting scissor through a cutting opening at its end. The elastic element is disposed between the first positioning block and the second positioning block, and when the elastic element is in a normal extended state, the cutting scissor is located between the first positioning block and the second positioning block.

[0011] Preferably, the elastic element includes a buffer rod and a buffer spring. One end of the buffer rod is vertically disposed on the end of the second positioning block near the end of the first positioning block, and the other end of the buffer rod movably passes through the first positioning block. The buffer spring is movably sleeved on the body of the buffer rod, and the two ends of the buffer spring are respectively connected to the opposite end faces of the first positioning block and the second positioning block. When the buffer spring is in the normal extended state, the cutting shears are located between the first positioning block and the second positioning block.

[0012] Preferably, the telescopic assembly includes two extension arms, two extension blocks, and a control component. The two extension arms are symmetrically and vertically arranged on the symmetrical sides of the rotating rod, and extension grooves are formed on the opposite end faces of the two extension arms. One end of each of the two extension blocks is respectively inserted into different extension grooves, and the other end is respectively connected to different first positioning blocks. The control component is arranged on the rotating rod and controls the two extension blocks to move closer to each other or further away from each other.

[0013] Preferably, the control component includes two rotating blocks, two linkage rods, a control rod, and a control screw. The two rotating blocks are fixedly installed on the same side of the two extension blocks at adjacent positions, and the rotating blocks slide through the sliding slots in the extension grooves opened on the side of the extension arm. One end of the two linkage rods is rotatably connected to different rotating blocks, and the ends of the linkage rods are rotatably connected to the two ends of the control rod. One end of the control screw is rotatably and vertically installed on the side of the rotating rod, and the screw body passes through the control rod through a threaded connection.

[0014] Preferably, the lifting assembly includes two lifting rods, two lifting blocks, a lifting screw, and a lifting slide bar. The two lifting rods are arranged vertically and symmetrically on the conveyor belt support about the conveyor belt, and lifting grooves are formed on the lifting rods in the vertical direction. The two lifting blocks are slidably inserted into the lifting grooves and are rotatably connected to the two ends of the rotating rods. The lifting screw is arranged vertically, and its bottom end passes through the top of one of the lifting rods into the lifting groove through a thread, and is connected to the lifting block. The lifting slide bar is arranged vertically, and its bottom end passes through the top of the other lifting rod into the lifting groove through a sliding thread, and is connected to the lifting block.

[0015] The beneficial effects of this utility model are:

[0016] 1. The positioning component uses a first positioning block and a second positioning block to accurately position the woven fabric for cutting. The second positioning block is fitted onto the cutting blade through the cutting opening. With the help of the elastic element, it can stably press down on the woven fabric during cutting, ensuring the accuracy of the cutting position, effectively avoiding cutting size deviations, and improving the specification consistency of the woven fabric products.

[0017] 2. The drive assembly controls the conveyor belt to keep the conveying speed of the woven fabric consistent with the rotation speed of the cutting scissors around the rotating rod. This synchronous control method makes the cutting process more stable, further ensuring cutting accuracy and meeting the needs of high-precision cutting.

[0018] 3. The telescopic assembly controls the two extension blocks to move closer or further apart through the control components, which can quickly adjust the position of the positioning component to adapt to the cutting needs of woven fabrics of different widths. This eliminates the need for complicated equipment debugging, saves time and manpower, and improves production efficiency.

[0019] 4. The overall design of the device is reasonable, which can realize the continuous conveying and cutting of woven fabric, reduce the downtime in the cutting process, further improve the cutting efficiency, and meet the needs of large-scale production. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a simplified structural diagram of the woven fabric production and cutting device proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the cutting mechanism of this utility model.

[0023] Figure 3 This is a bottom view schematic diagram of the cutting mechanism of this utility model.

[0024] In the diagram: 1. Conveyor belt; 2. Limiting cylinder; 3. Sliding rod; 4. Sliding block; 5. Limiting spring; 6. Lifting rod; 7. Rotating rod; 8. Lifting groove; 9. Lifting block; 10. Lifting screw; 11. Extending arm; 12. Sliding groove opening; 13. Extending block; 14. Rotating block; 15. First positioning block; 16. Cutting shears; 17. Second positioning block; 18. Cutting opening; 19. Linkage rod; 20. Control rod; 21. Control screw; 22. Buffer rod; 23. Buffer spring. Detailed Implementation

[0025] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the embodiments without creative effort are all within the protection scope of this utility model.

[0026] Example 1: Reference Figures 1-3 The illustrated woven fabric production and cutting device includes a cutting mechanism mounted on a conveyor belt 1 for cutting the woven fabric. The conveyor belt 1 is used to transport the woven fabric. The cutting mechanism includes a lifting assembly, a rotating rod 7, a telescopic assembly, a positioning assembly, a cutting shear 16, and a driving assembly. The rotating rod 7 is arranged horizontally above the conveyor belt 1 via the lifting assembly. The positioning assembly is mounted on the side of the rotating rod 7 via the telescopic assembly and is used to position the woven fabric on the conveyor belt 1 for cutting. The cutting shear 16 is mounted on the positioning assembly and is used to cut the positioned woven fabric. The driving assembly controls the conveyor belt 1 to transport the woven fabric and controls the rotating rod 7 to rotate around its axis. The conveying speed of the conveyor belt 1 to the woven fabric is consistent with the rotation speed of the cutting shear 16 around the rotating rod 7.

[0027] like Figures 1-3As shown, in this embodiment, firstly, based on the width and thickness of the woven fabric to be cut, the height of the rotating rod 7 is adjusted using the lifting assembly to position the cutting blades 16 in a suitable cutting position. The position of the positioning assembly is adjusted using the telescopic assembly to ensure accurate positioning of the woven fabric at the cutting position. The distance between the cutting blades 16 and the rotating rod 7 is adjusted using the telescopic assembly, facilitating the adjustment of the interval time when the rotating rod 7 drives the two cutting blades 16 to rotate. This adapts to the cutting needs of woven fabrics of different widths and facilitates precise cutting of the woven fabric during transport. Then, according to production requirements, the conveying speed of the conveyor belt 1 and the rotation speed of the cutting blades 16 around the rotating rod 7 are set, ensuring that both speeds remain consistent. The drive assembly (using a motor as the drive source) is started, and the conveyor belt 1 begins to operate, transporting the woven fabric to be cut to below the cutting mechanism. The woven fabric moves smoothly forward under the drive of the conveyor belt 1. When the woven fabric moves to the appropriate position, the positioning component, under the rotation of the rotating rod 7, rotates onto the woven fabric on the conveyor belt 1, pressing and fixing the woven fabric downwards. This achieves precise positioning of the woven fabric at the cutting position, avoiding inaccurate woven fabric dimensions due to offset during the cutting process, ensuring the uniformity and consistency of the cutting trajectory, and further improving cutting accuracy. As the woven fabric continues to be conveyed, the drive component controls the rotating rod 7 to continue rotating around the axis, and the cutting shears 16 rotate accordingly. Since the conveying speed of the woven fabric on the conveyor belt 1 is consistent with the rotation speed of the cutting shears 16 around the rotating rod 7, the cutting shears 16 can accurately cut the woven fabric at the cutting position fixed by the positioning component, achieving cutting the woven fabric to the preset size and shape during the conveying process. After the woven fabric is cut, under the rotation of the rotating rod 7, the cutting shears 16, which has just completed the cutting operation, moves away from the conveyor belt 1, causing the positioning component to separate from the woven fabric, achieving continuous, precise, and stable cutting of the woven fabric.

[0028] like Figure 1 As shown, multiple limiting cylinders 2 are arranged on the support of the conveyor belt 1 along the conveying direction of the conveyor belt 1. Different sliders 4 are rotatably connected to both ends of the limiting cylinder 2. A sliding rod 3 moves through the slider 4 in the vertical direction. A limiting spring 5 is sleeved on the sliding rod 3, and the two ends of the limiting spring 5 are connected to the top of the sliding rod 3 and the slider 4, respectively. When the side of the limiting cylinder 2 is tightly attached to the conveying surface of the conveyor belt 1, the limiting spring 5 is in a compressed state.

[0029] like Figures 1-3As shown, the positioning component includes a first positioning block 15, a second positioning block 17, and an elastic element. The first positioning block 15 is fixedly disposed on the telescopic component, and a cutting scissor 16 is fixedly disposed on the end of the first positioning block 15 away from the telescopic component. The second positioning block 17 is disposed parallel to the end of the first positioning block 15 away from the telescopic component, and the second positioning block 17 is sleeved on the cutting scissor 16 through a cutting opening 18 at its end. The elastic element is disposed between the first positioning block 15 and the second positioning block 17, and when the elastic element is in a normal extended state, the cutting scissor 16 is located between the first positioning block 15 and the second positioning block 17.

[0030] like Figures 1-3As shown, when the device starts operating, the conveyor belt 1 transports the woven fabric, and the rotating rod 7 drives the positioning assembly and the cutting shears 16 to rotate. At this time, because the elastic element is in its normal extended state, a certain distance is maintained between the first positioning block and the second positioning block, with the cutting shears 16 positioned between them. As the rotating rod 7 rotates, the first positioning block 15 and the second positioning block 17 gradually approach the woven fabric transported by the conveyor belt 1. The second positioning block 17 first contacts the surface of the woven fabric. Since the second positioning block 17 is fitted onto the cutting shears 16 through the cutting opening 18, it can stably press down on the woven fabric when in contact with it, providing initial positioning for the cutting position. As the rotating rod 7 rotates, the first positioning block 15 also approaches the woven fabric, and the cutting shears 16 gradually approaches the surface of the woven fabric. At this time, the elastic element begins to be compressed, generating elastic force. Under the elastic force of the elastic element, the second positioning block 17 can fit tightly against the woven fabric, ensuring that the woven fabric will not move or shift during the cutting process, thereby achieving precise positioning of the woven fabric cutting position. The second positioning block 17 is fitted onto the cutting scissors 16 through the cutting opening 18 and cooperates with the first positioning block 15 to accurately position the cutting scissors 16 at the cutting position of the woven fabric, avoiding inaccurate cutting dimensions caused by positioning deviation. Especially in application scenarios with high cutting precision requirements, such as precision packaging of electronic products and fine cutting of high-end clothing, this precise positioning can ensure the consistency of product quality and specifications. The elastic force provided by the elastic element allows the second positioning block 17 to fit tightly against the woven fabric, preventing the woven fabric from moving or shifting during the cutting process, further improving cutting precision. After the woven fabric is positioned, the cutting scissors 16 starts to rotate under the drive of the rotating rod 7 to cut the woven fabric. At this time, the first positioning block 15 is relatively close to the second positioning block 17, and the elastic element is compressed. During the cutting process, the elastic element continuously functions, automatically adjusting the pressure of the second positioning block 17 on the woven fabric according to its thickness and stiffness, ensuring the stability and quality of the cut. The elastic element acts as a buffer during positioning, reducing the impact of the cutting shears 16 on the woven fabric and preventing problems such as frayed edges and tearing due to excessive force. The cut edges of the woven fabric are neater and smoother, improving the product's aesthetics and practicality. After the rotating rod 7 drives the cutting shears 16 to cut the woven fabric conveyed on the conveyor belt 1, while the rotating rod 7 is still rotating, the second positioning block 17 moves away from the cut woven fabric position. The elastic element gradually returns to its extended state, pushing the second positioning block 17 away from the first positioning block 15, returning to its initial position. The cutting shears 16 also move away from the woven fabric along with the first positioning block 15, preparing for the next cut.

[0031] like Figure 2 and Figure 3As shown, the elastic element includes a buffer rod 22 and a buffer spring 23. One end of the buffer rod 22 is vertically disposed on the end of the second positioning block 17 near the end of the first positioning block 15, and the other end of the buffer rod 22 is movably inserted through the first positioning block 15. The buffer spring 23 is movably sleeved on the body of the buffer rod 22, and the two ends of the buffer spring 23 are respectively connected to the opposite end faces of the first positioning block 15 and the second positioning block 17. When the buffer spring 23 is in the normal extended state, the cutting shears 16 are located between the first positioning block 15 and the second positioning block 17.

[0032] like Figure 2 and Figure 3 As shown, the elasticity of the buffer spring 23 ensures that the second positioning block 17 fits tightly against the woven fabric, preventing the fabric from moving or shifting during the cutting process and ensuring the accuracy of the cutting position. The buffer rod 22 acts as a guide, ensuring the stability of the second positioning block 17 during movement and positioning, avoiding cutting deviations caused by unstable positioning, and improving cutting accuracy. Since the buffer spring can automatically adjust its elasticity according to the actual condition of the woven fabric, it can achieve precise positioning for woven fabrics of different thicknesses and materials, enhancing the versatility and adaptability of the positioning component. The buffer spring 23 acts as a buffer during positioning, reducing the impact of the cutting shears 16 on the woven fabric and preventing problems such as frayed edges and tearing caused by excessive force. The cut edges of the woven fabric are neater and smoother, improving the product's aesthetics and practicality, and reducing the scrap rate caused by cutting quality issues.

[0033] The buffer spring 23 can automatically adjust the pressure according to the characteristics of the woven fabric, ensuring that the pressure of the cutter on the woven fabric during the cutting process is moderate. It will not cause incomplete cutting due to insufficient pressure, nor will it damage the woven fabric due to excessive pressure, thus further improving the cutting quality.

[0034] like Figures 2-3 As shown, the telescopic assembly includes two extension arms 11, two extension blocks 13, and a control component. The two extension arms 11 are symmetrically and vertically arranged on the symmetrical sides of the rotating rod 7, and extension grooves are formed on the opposite end faces of the two extension arms 11. One end of each of the two extension blocks 13 is respectively inserted into different extension grooves, and the other end is respectively connected to different first positioning blocks 15. The control component is set on the rotating rod 7 and controls the two extension blocks 13 to move closer to each other or further away from each other.

[0035] In this embodiment, the control unit drives the two extension blocks 13 to move away from or closer to each other in the extension groove, which facilitates the control of the distance between the cutting shears 16 set on the two extension blocks 13 and the rotating rod 7, and the woven fabric is conveyed at the same speed for cutting. By adjusting the distance between the cutting shears 16 and the rotating rod 7, it is easy to adjust the interval time between the two cutting shears 16 moving to the conveyor belt 1 to convey the woven fabric, and to adjust the length of the woven fabric to be cut, so as to meet the cutting requirements of different lengths of woven fabric.

[0036] like Figure 2 and Figure 3 As shown, the control components include two rotating blocks 14, two linkage rods 19, a control rod 20, and a control screw 21. The two rotating blocks 14 are fixedly installed on the same side of the two extension blocks 13 at adjacent positions, and the rotating blocks 14 slide through the sliding slots 12 that are opened in the extension slots on the side of the extension arm 11. One end of the two linkage rods 19 is rotatably connected to different rotating blocks 14, and the two ends of the linkage rods 19 are rotatably connected to the two ends of the control rod 20 respectively. One end of the control screw 21 is rotatably and vertically installed on the side of the rotating rod 7, and the rod body passes through the control rod 20 through a threaded connection.

[0037] In this embodiment, by rotating the control screw 21, the control rod 20 on the control screw 21 can be moved to adjust the distance between the control rod 20 and the rotating rod 7. After the distance between the control rod 20 and the rotating rod 7 is adjusted, the two linkage rods 19 push or pull the two extension blocks 13 to move closer or further apart in the two extension slots, thereby facilitating the movement of the cutting shears 16 set on the extension blocks 13 from the rotating rod 7.

[0038] like Figure 1 As shown, the lifting assembly includes two lifting rods 6, two lifting blocks 9, a lifting screw 10, and a lifting slide rod. The two lifting rods 6 are arranged vertically and symmetrically on the support of the conveyor belt 1 about the conveyor belt 1. Lifting grooves 8 are opened vertically on the body of the lifting rods 6. The two lifting blocks 9 are slidably inserted into the lifting grooves 8 and are rotatably connected to the two ends of the rotating rod 7. The lifting screw 10 is arranged vertically, and its bottom end passes through the top of one of the lifting rods 6 into the lifting groove 8 by a thread and is connected to the lifting block 9. The lifting slide rod is arranged vertically, and its bottom end passes through the top of the other lifting rod 6 into the lifting groove 8 by a sliding thread and is connected to the lifting block 9.

[0039] like Figure 1As shown in this embodiment, when adjusting the distance between the cutting shears 16 and the rotating rod 7, the lifting screw 10 is rotated to facilitate its raising and lowering on the lifting rod 6. This facilitates the stable raising and lowering of the lifting block 9 within the lifting groove 8, and allows for adjustment of the distance between the cutting shears 16 and the rotating rod 7. By rotating the lifting screw 10, the height of the lifting block 9 is adjusted, thereby achieving precise adjustment of the height of the rotating rod 7 and the cutting mechanism. The height of the cutting mechanism can be flexibly adjusted according to different specifications and thicknesses of woven fabrics, ensuring that the cutting shears 16 is always in the optimal cutting position, improving cutting accuracy and quality. The lifting slide bar plays a crucial guiding role, restricting the horizontal rotation and movement of the lifting block 9, allowing it to slide smoothly only in the vertical direction. This ensures that the rotating rod 7 remains horizontal during raising and lowering, avoiding cutting deviations caused by the tilt of the rotating rod 7, and improving the operational stability of the cutting mechanism.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A woven fabric production cutting device comprising a cutting mechanism arranged on a conveyor belt (1) for cutting woven fabric, the conveyor belt (1) being used to convey the woven fabric, characterized in that, The cutting mechanism includes a lifting assembly, a rotating rod (7), a telescopic assembly, a positioning assembly, a cutting shear (16), and a driving assembly. The rotating rod (7) is arranged horizontally above the conveyor belt (1) via the lifting assembly. The positioning assembly is arranged on the side of the rotating rod (7) via the telescopic assembly and is used to position the woven fabric on the conveyor belt (1) for cutting. The cutting shear (16) is arranged on the positioning assembly and is used to cut the woven fabric after positioning. The driving assembly controls the conveyor belt (1) to transport the woven fabric and controls the rotating rod (7) to rotate around the axis. The conveying speed of the conveyor belt (1) to transport the woven fabric is consistent with the rotation speed of the cutting shear (16) around the rotating rod (7).

2. The woven cloth production cutting device according to claim 1, characterized by: The positioning component includes a first positioning block (15), a second positioning block (17), and an elastic element. The first positioning block (15) is fixedly mounted on the telescopic component, and a cutter (16) is fixedly mounted on the end of the first positioning block (15) away from the telescopic component. The second positioning block (17) is parallel to the end of the first positioning block (15) away from the telescopic component, and the second positioning block (17) is fitted onto the cutter (16) through a cutting opening (18) at its end. The elastic element is disposed between the first positioning block (15) and the second positioning block (17), and when the elastic element is in a normal extended state, the cutter (16) is located between the first positioning block (15) and the second positioning block (17).

3. The device according to claim 2, wherein: The elastic element includes a buffer rod (22) and a buffer spring (23). One end of the buffer rod (22) is vertically disposed on the end of the second positioning block (17) near the end of the first positioning block (15), and the other end of the buffer rod (22) is movably inserted through the first positioning block (15). The buffer spring (23) is movably sleeved on the body of the buffer rod (22), and the two ends of the buffer spring (23) are respectively connected to the opposite end faces of the first positioning block (15) and the second positioning block (17). When the buffer spring (23) is in the normal extended state, the cutter (16) is located between the first positioning block (15) and the second positioning block (17).

4. The device according to claim 2, wherein: The telescopic assembly includes two extension arms (11), two extension blocks (13), and a control component. The two extension arms (11) are symmetrically and vertically arranged on the symmetrical sides of the rotating rod (7), and extension grooves are provided on the opposite end faces of the two extension arms (11). One end of the two extension blocks (13) is respectively inserted into different extension grooves, and the other end is respectively connected to different first positioning blocks (15). The control component is set on the rotating rod (7) and controls the two extension blocks (13) to move closer to each other or further away from each other.

5. The apparatus according to claim 4, wherein: The control components include two rotating blocks (14), two linkage rods (19), a control rod (20), and a control screw (21). The two rotating blocks (14) are fixedly installed on the same side of the two extension blocks (13) at adjacent positions, and the rotating blocks (14) slide through the sliding slot (12) in the extension slot opened on the side of the extension arm (11). One end of the two linkage rods (19) is rotatably connected to different rotating blocks (14), and the two ends of the control rod (20) are rotatably connected to the two ends of the control rod (20) respectively. One end of the control screw (21) is rotatably and vertically installed on the side of the rotating rod (7), and the rod body passes through the control rod (20) through a threaded connection.

6. The device according to any one of claims 1 to 5, wherein: The lifting assembly includes two lifting rods (6), two lifting blocks (9), a lifting screw (10), and a lifting slide. The two lifting rods (6) are arranged vertically and symmetrically on the support of the conveyor belt (1) about the conveyor belt (1). The lifting rods (6) have lifting grooves (8) opened vertically on their bodies. The two lifting blocks (9) are slidably inserted into the lifting grooves (8) and are rotatably connected to the two ends of the rotating rod (7). The lifting screw (10) is arranged vertically, and its bottom end passes through the top of one of the lifting rods (6) into the lifting groove (8) by a thread and is connected to the lifting block (9). The lifting slide is arranged vertically, and its bottom end passes through the top of the other lifting rod (6) into the lifting groove (8) by a sliding thread and is connected to the lifting block (9).

Images