Cut cloth pre-tightening and positioning device

Abstract

The utility model relates to the technical field of cloth processing equipment, in particular to a pre-tightening and positioning device for cloth cutting. Comprising two driving rollers which rotate oppositely, the intermittent pressing assembly comprises a driving part and a pressing plate which is driven by the driving part to move up and down, and the pressing plate is driven by the driving part to move up and down. A conveying belt is arranged on the cloth cutting table, cloth penetrates through a gap between the two driving rollers and is driven by the driving wheels to be conveyed forwards along the conveying belt, the cloth is pressed by the pressing plate in a periodic interval state, and the cloth is cut by the cutting assembly while pressing is conducted. The cloth can be efficiently and accurately pre-tightened and positioned.

Description

Technical Field

[0001] This utility model relates to the field of fabric processing equipment technology, and in particular to a fabric pre-tensioning and positioning device. Background Technology

[0002] In the fabric processing process, precise cutting is crucial to ensuring the dimensional accuracy of garments and other fabric products. However, some problems are often encountered in actual cutting operations.

[0003] On the one hand, fabric itself is soft and easily deformed. Without proper pre-tensioning during cutting, wrinkles and looseness can easily occur. This not only affects the cutting accuracy but may also lead to uneven edges on the cut fabric, increasing the difficulty of subsequent processing. On the other hand, traditional manual positioning often relies on the operator's experience and skills, making it difficult to guarantee the accuracy and consistency of positioning each time. Moreover, it is inefficient, and inaccurate positioning can cause skewed cutting.

[0004] For some fabric processing enterprises that require large-scale, high-efficiency cutting, existing fabric pre-tensioning and positioning devices cannot meet the production pace. Therefore, there is a need for a device that can efficiently and accurately pre-tension and position fabric to improve cutting quality and production efficiency, reduce production costs, and meet the development needs of the modern fabric processing industry. Utility Model Content

[0005] To address the problem of efficiently and accurately pre-tightening and positioning fabric, this utility model provides a fabric pre-tightening and positioning device.

[0006] This utility model provides a fabric pre-tensioning and positioning device, including a fabric cutting table, a feeding assembly connected to the fabric cutting table for placing the fabric, a double-roller power assembly, a cutting assembly, and an intermittent pressing assembly arranged sequentially on the fabric cutting table. The double-roller power assembly includes two opposing rotating drive rollers. The intermittent pressing assembly includes a drive member and a pressure plate that moves up and down driven by the drive member. A conveyor belt is provided on the fabric cutting table. The fabric passes through the gap between the two drive rollers and is conveyed forward along the conveyor belt under the drive of the drive wheel. The pressure plate presses the fabric at periodic intervals. At the same time as pressing, the cutting assembly cuts the fabric.

[0007] Furthermore, the feeding assembly includes a feeding platform connected to the cutting table, vertical side plates disposed on both sides of the platform, a rotating expansion shaft and a reversing roller disposed between the vertical side plates, the reversing roller being located obliquely above the rotating expansion shaft.

[0008] Furthermore, the reversing roller includes a steering roller and a gravity roller. The steering roller is positioned diagonally above the gravity roller, and the gravity roller is movably mounted on the vertical side plate via a movable arm. The gravity roller applies a downward pulling force to the fabric while moving downward under gravity.

[0009] Furthermore, the cutting table includes a vertically arranged support, with an adjusting rod one and an adjusting rod two perpendicular to the support at both ends. A horizontally placed slide rod is movably connected between the adjusting rod one and the adjusting rod two. An arc-shaped support rod is provided on the slide rod, forming a slide track. An edge position monitoring sensor that can slide along the slide track is installed inside the slide track. A cylinder telescopic rod one that drives the slide track rod to move along the extension direction of the adjusting rod one is connected to the adjusting rod one. A cylinder telescopic rod two that drives the slide track rod to move along the extension direction of the adjusting rod two is connected to the adjusting rod two.

[0010] Furthermore, the dual-roller power assembly includes a lifting frame mounted on the fabric cutting table, and the drive roller includes a fixed drive roller mounted on the lifting frame and rotating along a fixed axis, and a movable drive roller mounted on the lifting frame. The lifting frame is provided with a control mechanism that drives the movable drive roller to move up and down. The movable drive roller moves toward the fixed drive roller to clamp the fabric. The surfaces of the movable drive roller and the fixed drive roller are provided with a rubber layer. The fixed drive roller is connected to a motor one, and the movable drive roller is connected to a motor two.

[0011] Furthermore, a transmission box is fixedly installed at the bottom of the lifting frame, and the control mechanism includes screws arranged on both sides inside the lifting frame, and sliders connected to the screws. The sliders on both sides are used to install the drive rollers. The screws on both sides extend through the transmission box into the interior and are fitted with bevel gears. The threads of the screws on both sides are opposite.

[0012] Furthermore, the control mechanism also includes two retainers disposed inside the transmission box. Each retainer is rotatably connected to a second bevel gear that meshes with a first bevel gear. A dual-axis motor is disposed inside the transmission box between the two retainers. The output shafts on both sides of the dual-axis motor are respectively connected to the second bevel gear for transmission.

[0013] Furthermore, the intermittent pressing assembly includes a pressing support frame, the driving component includes an eccentric turntable mounted on the support frame, a motor connected to the eccentric turntable, vertical rods mounted on both sides of the cutting table, a moving block mounted on the vertical rod, a return spring between the moving block and the top of the vertical rod, an arc-shaped push plate between the two moving blocks, and the pressing plate is fixedly mounted on the bottom of the arc-shaped push plate.

[0014] Furthermore, the cutting assembly includes a cutting frame, on which a linear track mechanism including a motor is provided. The linear track mechanism includes a linear guide rail, a belt, a track slider on the linear guide rail, an electric telescopic rod on the track slider, and a cutting blade at the end of the electric telescopic rod.

[0015] Furthermore, a controller is provided on one side of the fabric cutting table. The controller is electrically connected to the rotating expansion shaft, the edge position monitoring sensor, the cylinder telescopic rod one, the cylinder telescopic rod two, the motor one, the motor two, the dual-axis motor, the motor three, the motor four, and the electric telescopic rod via wires.

[0016] In summary, this utility model has the following beneficial technical effects:

[0017] 1. The present invention proposes a fabric pre-tightening and positioning device, in which two opposing rotating drive rollers in a double-roller power assembly move toward a fixed drive roller under the action of a control mechanism, which can tightly clamp the fabric. At the same time, the rubber layer on the surface of the drive roller and the fixed drive roller increases the friction between them and the fabric. During the process of driving the fabric forward along the conveyor belt, the fabric is kept flat and taut, so that the edges of the cut fabric are neat.

[0018] 2. This utility model has an automatic positioning and correction function. The design of the feeding component facilitates the placement and conveying of the fabric. The gravity roller of the reversing roller moves downward under gravity and applies tension to the fabric. With the cooperation of the edge position monitoring sensor and the cylinder telescopic rod one and cylinder telescopic rod two, the edge position of the fabric can be monitored in real time and adjusted to achieve fabric straightening and positioning. This ensures accurate positioning for each cut, avoids skewed cutting, and greatly improves cutting accuracy.

[0019] 3. The intermittent pressing assembly of this utility model presses the fabric periodically under the drive of the driving component. At the same time as pressing, the cutting assembly cuts the fabric. This periodic working mode realizes continuous fabric conveying and intermittent cutting, realizes continuous cutting operation, and avoids the fabric from slipping during the cutting process, which greatly improves the cutting efficiency.

[0020] 4. This utility model features automated control, making operation convenient and efficient. The controller on one side of the fabric cutting table is electrically connected to the rotating expansion shaft, edge position monitoring sensor, cylinder telescopic rod, various motors, and electric telescopic rod via wires, realizing automated control of the entire device and improving the ease of operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a fabric pre-tensioning and positioning device according to an embodiment of the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the structure of a fabric pre-tensioning and positioning device according to an embodiment of the present invention. Figure 2 .

[0023] Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged views of parts A and B in the image.

[0024] Figure 4 This is a schematic diagram of the structure of a fabric pre-tensioning and positioning device according to an embodiment of the present invention. Figure 3 .

[0025] Figure 5 This is an embodiment of the present utility model. Figure 4 A magnified view of part C.

[0026] Figure 6 This is an embodiment of the present utility model. Figure 4 A magnified view of part of D.

[0027] Figure 7 This is a schematic diagram of the fabric winding method according to an embodiment of the present invention.

[0028] Figure 8 This is a cross-sectional schematic diagram of the lifting frame according to an embodiment of the present utility model.

[0029] The components include: 1. Fabric cutting table; 2. Feeding assembly; 201. Feeding platform; 202. Vertical side plate; 203. Rotary expansion shaft; 204. Support; 205. Reversing roller; 2051. Steering roller; 2052. Gravity roller; 206. Movable arm; 207. Adjusting rod one; 208. Adjusting rod two; 209. Slide rod; 210. Arc-shaped support rod; 211. Edge position monitoring sensor; 212. Cylinder telescopic rod one; 213. Cylinder telescopic rod two; 3. Double roller power assembly; 301. Lifting frame; 302. Drive roller; 3021. Fixed drive roller; 3022. Moving drive roller; 303. Motor one; 304. 305. Motor 2; 306. Transmission box; 307. Screw; 308. Slider; 309. Bevel gear 1; 310. Cage; 311. Bevel gear 2; 312. Dual-axis motor; 4. Cutting assembly; 401. Cutting frame; 402. Motor 4; 403. Linear track mechanism; 404. Track slider; 405. Electric telescopic rod; 406. Cutting blade; 5. Intermittent clamping assembly; 501. Clamping support frame; 502. Eccentric turntable; 503. Motor 3; 504. Vertical rod; 505. Moving block; 506. Return spring; 507. Arc-shaped push plate; 508. Pressure plate; 6. Conveyor belt; 7. Controller. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] Reference Figure 1 This embodiment of a fabric pre-tightening and positioning device includes a fabric cutting table 1, a fabric feeding assembly 2 connected to the fabric cutting table 1 for placing the fabric, a double-roller power assembly 3, a cutting assembly 4, and an intermittent pressing assembly 5 sequentially arranged on the fabric cutting table 1. The double-roller power assembly 3 includes two opposing rotating drive rollers 302. The intermittent pressing assembly 5 includes a drive member and a pressure plate 508 driven up and down by the drive member. The fabric cutting table 1 is provided with a conveyor belt 6. The fabric passes through the gap between the two drive rollers 302 and is conveyed forward along the conveyor belt 6 under the drive of the drive wheel. The pressure plate 508 presses the fabric in a periodic interval state. At the same time as pressing, the cutting assembly 4 cuts the fabric.

[0033] Reference Figure 2 The feeding assembly 2 includes a feeding platform 201 connected to the cutting table 1, vertical side plates 202 arranged on both sides of the platform, a rotating expansion shaft 203 and a reversing roller 205 rotatably arranged between the vertical side plates 202, and the reversing roller 205 is located obliquely above the rotating expansion shaft 203.

[0034] Reference Figure 2 The reversing roller 205 includes a steering roller 2051 and a gravity roller 2052. The steering roller 2051 is disposed diagonally above the gravity roller 2052. The gravity roller 2052 is movably mounted on the vertical side plate 202 via a movable arm 206. The gravity roller 2052 applies a downward pulling force to the fabric while moving downward under gravity.

[0035] The feeding platform 201 serves as the support base for the fabric roll and is horizontally fixed to the lower front end of the cutting table 1. It can hold fabric that has not been rolled up. The vertical side plates 202 on both sides form a limiting structure, which to a certain extent prevents the fabric roll from moving laterally during feeding.

[0036] The rotating expansion shaft 203 is installed in the bearing seat of the vertical side plate 202 and can rotate flexibly. Rolled fabric can be placed on the rotating expansion shaft 203. Its special surface design can fit tightly with the inner core of the fabric roll, providing stable support during the fabric release process, avoiding loosening and jamming, and ensuring smooth unwinding.

[0037] The steering roller 2051 is fixed to the top of the vertical side plate 202, changing the conveying direction of the fabric and transforming it from a horizontal unwinding state to an inclined conveying state suitable for pre-tensioning. (Refer to...) Figure 7The gravity roller 2052 is hinged to the bracket 204 via the movable arm 206, allowing it to float up and down. It applies tension to the fabric using its own weight, working in conjunction with the steering roller 2051 to initially tension the fabric, eliminating any slack and preparing it for subsequent processing. This causes the fabric to enter the next stage's dual-roller power assembly 3 in an S-shape.

[0038] Reference Figure 3 The cutting table 1 includes a vertically arranged support 204. At both ends of the support 204 are an adjusting rod 207 and an adjusting rod 208 perpendicular to the support 204. A horizontally placed slide rail 209 is movably connected between the adjusting rod 207 and the adjusting rod 208. An arc-shaped support rod 210 is provided on the slide rail 209, forming a slide track. An edge position monitoring sensor 211, which can slide along the slide track, is installed inside the slide track. A cylinder telescopic rod 212, which drives the slide rail 209 to move along the extension direction of the adjusting rod 207, is connected to the adjusting rod 207. A cylinder telescopic rod 213, which drives the slide rail 209 to move along the extension direction of the adjusting rod 208, is connected to the adjusting rod 208.

[0039] Adjusting rod 1 207 and adjusting rod 208 are vertically fixed at both ends of bracket 204 to guide slide rod 209, enabling it to move in two dimensions that are angled toward the fabric conveying direction, thereby realizing the monitoring and adjustment of fabric edges at different positions.

[0040] The slide bar 209 has a slide rail inside, which cooperates with the slider 307 of the edge position monitoring sensor 211 to adjust the position of the edge position monitoring sensor 211 and monitor the left and right movement of the fabric. The edge position monitoring sensor 211 can use an infrared sensor. The edge position monitoring sensor 211 slides along the edge of the fabric to ensure that the sensor can adapt to the edge monitoring needs of fabrics of different widths.

[0041] Edge position monitoring sensor 211 detects the edge position of the fabric in real time and transmits the collected signal to controller 7. When a positional deviation occurs, cylinder extension rod one 212 and cylinder extension rod two 213 move in the direction of adjustment rod one 207 and adjustment rod two 208, thereby restoring the fabric to a centered state and ensuring centered fabric conveying.

[0042] Reference Figure 2 and Figure 8The dual-roller power assembly 3 includes a lifting frame 301 mounted on the fabric cutting table 1. The drive roller 302 includes a fixed drive roller 3021 mounted on the lifting frame 301 and rotating along a fixed axis, and a movable drive roller 3022 mounted on the lifting frame 301. The lifting frame 301 is provided with a control mechanism that drives the movable drive roller 3022 to move up and down. The movable drive roller 3022 moves toward the fixed drive roller 3021 to clamp the fabric. The surfaces of the movable drive roller 3022 and the fixed drive roller 3021 are provided with rubber layers. The fixed drive roller 3021 is connected to a motor 303, and the movable drive roller 3022 is connected to a motor 304.

[0043] Reference Figure 8 The bottom of the lifting frame 301 is fixedly installed with a transmission box 305. The control mechanism includes screws 306 arranged on both sides inside the lifting frame 301 and sliders 307 connected to the screws 306. The sliders 307 on both sides are used to install the drive rollers 3022. The screws 306 on both sides extend through the transmission box 305 into the interior and are fitted with bevel gears 308. The threads of the screws 306 on both sides are opposite.

[0044] Reference Figure 8 The control mechanism also includes two retainers 309 disposed inside the transmission box 305. Each retainer 309 is rotatably connected to a bevel gear 310 that meshes with a bevel gear 308. A dual-axis motor 311 is disposed inside the transmission box 305 between the two retainers 309. The output shafts on both sides of the dual-axis motor 311 are respectively connected to the bevel gear 310 for transmission.

[0045] The fixed drive roller 3021 is fixedly installed on the upper part of the lifting frame 301 and is driven to rotate by the motor 303. The special material on its surface increases the friction with the fabric, ensuring that the fabric will not slip during the conveying process and stably driving the fabric forward.

[0046] The moving drive roller 3022 is connected to the control mechanism inside the lifting frame 301 via the slider 307, and can move up and down. Driven by the second motor 304, it forms a roller-pair structure with the fixed drive roller 3021, which can clamp the fabric.

[0047] In the control mechanism, the screws 306 on both sides have opposite thread directions and cooperate with the nut of the slider 307. When the dual-axis motor 311 drives the bevel gear set to rotate, the screws 306 on both sides rotate synchronously in opposite directions, causing the moving drive roller 3022 to rise and fall symmetrically, ensuring the clamping force on the fabric. The first bevel gear 308 and the second bevel gear 310 convert the horizontal rotational motion of the dual-axis motor 311 into the vertical rotational motion of the screws 306, realizing the control of the up and down position of the moving drive roller 3022.

[0048] Reference Figure 4 and Figure 5The intermittent pressing assembly 5 includes a pressing support frame 501, the driving component includes an eccentric turntable 502 mounted on the support frame, a motor 503 connected to the eccentric turntable 502, vertical rods 504 mounted on both sides of the cutting table 1, a moving block 505 mounted on the vertical rod 504, a return spring 506 between the moving block 505 and the top of the vertical rod 504, an arc-shaped push plate 507 between the two moving blocks 505, and a pressure plate 508 fixedly mounted on the bottom of the arc-shaped push plate 507.

[0049] An eccentric turntable 502 is mounted on the output shaft of motor 503. When it rotates, the rotational motion is converted into the reciprocating linear motion of the arc-shaped push plate 507 through the eccentric structure, realizing the periodic pressing of the fabric by the pressure plate 508. The return spring 506 is sleeved on the outside of the vertical rod 504. When the eccentric turntable 502 rotates and causes the pressure plate 508 to descend and press the fabric, the spring is stretched and stores energy. When the turntable rotates to a specific position, the spring releases energy, driving the pressure plate 508 to quickly return to its original position, waiting for the next time the pressure plate 508 descends and presses the fabric.

[0050] Reference Figure 4 and Figure 6 The cutting assembly 4 includes a cutting frame 401, on which a linear track mechanism 403 including a motor 402 is provided. The linear track mechanism 403 includes a linear guide rail, a belt, and a track slider 404307 on the linear guide rail. An electric telescopic rod 405 is provided on the track slider 404307, and a cutting blade 406 is provided at the end of the electric telescopic rod 405.

[0051] Driven by motor 402, linear track mechanism 403 moves track slider 404307 along linear guide rail, providing a stable and precise motion trajectory for cutting blade 406, ensuring that cutting blade 406 can move along the predetermined path.

[0052] The electric telescopic rod 405 receives commands from the controller 7 and rapidly drives the cutting blade 406 to move up and down. When the pressure plate 508 presses the fabric, it works in conjunction with the linear track mechanism 403 to achieve precise cutting of the fabric. The timing of the cutting can be adjusted by changing the number of cycles of the intermittent pressing component 5, thus adjusting the length of the fabric to be cut. It is important to note that the rotation speed of the dual-roller power component 3 should not be too high, otherwise fabric accumulation will occur, leading to skewed cutting. The linear track mechanism 403 can use a belt-driven linear guide mechanism from the prior art. The cutting blade 406 moves linearly at a relatively high speed, completing the cutting before the pressure plate 508 is lifted. Because a conveyor belt 6 is located behind the intermittent pressing component 5, the cut fabric can be removed. The fabric to be cut at the front end will continue to move forward with the conveyor belt 6 upon contact, preventing fabric accumulation and ensuring the next cut is not affected.

[0053] A controller 7 is provided on one side of the fabric cutting table 1. The controller 7 is electrically connected to the rotating expansion shaft 203, the edge position monitoring sensor 211, the cylinder telescopic rod 1 212, the cylinder telescopic rod 213, the motor 1 303, the motor 2 304, the dual-axis motor 311, the motor 3 503, the motor 4 402, and the electric telescopic rod 405 via wires.

[0054] Working principle: The fabric roll is placed on the rotating tension shaft 203 and released as the shaft rotates, conveying it towards the reversing roller 205. The fabric first passes under the gravity roller 2052, then passes over the reversing roller 2051. The gravity roller 2052 applies tension to the fabric using its own weight, cooperating with the reversing roller 2051 to initially tension the fabric and eliminate its slack. The edge position monitoring sensor 211 monitors the fabric deviation and transmits the signal to the controller 7. Based on the deviation, the control cylinder extension rod 1 212 and cylinder extension rod 213 adjust the position of the slide rod 209. Influenced by the arc-shaped support rod 210, the fabric is corrected to a centered position, ensuring centered fabric conveying. The dual-axis motor 311 drives the control mechanism, causing the moving drive roller 3022 to move upward and clamp the fabric with the fixed drive roller 3021. Driven by motors 303 and 304, the fabric is conveyed forward along conveyor belt 6 by the friction between the double rollers and the fabric. The double rollers rotate continuously, maintaining stable clamping and conveying of the fabric, ensuring that the fabric remains flat and undeformed during conveying. Motor 503 drives the eccentric turntable 502 to rotate, causing the arc-shaped push plate 507 and pressure plate 508 to move up and down periodically. When pressure plate 508 descends, it presses the fabric, and the return spring 506 is compressed and stores energy; when pressure plate 508 rises, the spring releases energy to quickly return to its original position. At the instant pressure plate 508 presses the fabric, controller 7 triggers linear track mechanism 403 and electric telescopic rod 405. Motor 402 drives the cutting blade 406 to move along the linear guide rail, and electric telescopic rod 405 simultaneously drives the cutting blade 406 to descend, completing the cutting of the fabric.

[0055] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A fabric pre-tensioning and positioning device, characterized in that, The device includes a fabric cutting table (1), a fabric feeding assembly (2) connected to the fabric cutting table (1) for placing fabric, a double-roller power assembly (3), a cutting assembly (4) and an intermittent pressing assembly (5) arranged sequentially on the fabric cutting table (1). The double-roller power assembly (3) includes two opposing rotating drive rollers (302). The intermittent pressing assembly (5) includes a drive member and a pressure plate (508) driven up and down by the drive member. The fabric cutting table (1) is provided with a conveyor belt (6). The fabric passes through the gap between the two drive rollers (302) and is conveyed forward along the conveyor belt (6) under the drive of the drive wheel. The pressure plate (508) presses the fabric in a periodic interval state. At the same time as pressing, the cutting assembly (4) cuts the fabric.

2. The fabric pre-tensioning and positioning device according to claim 1, characterized in that, The feeding assembly (2) includes a feeding platform (201) connected to the cutting table (1), vertical side plates (202) on both sides of the platform, a rotating expansion shaft (203) and a reversing roller (205) rotatably disposed between the vertical side plates (202), and the reversing roller (205) is located obliquely above the rotating expansion shaft (203).

3. The fabric pre-tensioning and positioning device according to claim 2, characterized in that, The reversing roller (205) includes a steering roller (2051) and a gravity roller (2052). The steering roller (2051) is disposed diagonally above the gravity roller (2052). The gravity roller (2052) is movably mounted on the vertical side plate (202) via a movable arm (206). The gravity roller (2052) applies a downward pulling force to the fabric while moving downward under gravity.

4. The fabric pre-tensioning and positioning device according to claim 3, characterized in that, The cutting table (1) includes a vertically arranged support (204). At both ends of the support (204) are an adjusting rod 1 (207) and an adjusting rod 2 (208) perpendicular to the support (204). A horizontally placed slide rod (209) is movably connected between the adjusting rod 1 (207) and the adjusting rod 2 (208). An arc-shaped support rod (210) is provided on the slide rod (209). The slide rod (209) forms a slide. An edge position monitoring sensor (211) that can slide along the slide is installed in the slide. A cylinder telescopic rod 1 (212) that drives the slide rod (209) to move along the extension direction of the adjusting rod 1 (207) is connected to the adjusting rod 1 (207). A cylinder telescopic rod 2 (213) that drives the slide rod (209) to move along the extension direction of the adjusting rod 2 (208) is connected to the adjusting rod 2 (208).

5. The fabric pre-tensioning and positioning device according to claim 4, characterized in that, The dual-roller power assembly (3) includes a lifting frame (301) mounted on the fabric cutting table (1). The drive roller (302) includes a fixed drive roller (3021) mounted on the lifting frame (301) and rotating along a fixed axis, and a moving drive roller (3022) mounted on the lifting frame (301). The lifting frame (301) is provided with a control mechanism that drives the moving drive roller (3022) to move up and down. The moving drive roller (3022) moves toward the fixed drive roller (3021) to clamp the fabric. The surfaces of the moving drive roller (3022) and the fixed drive roller (3021) are provided with a rubber layer. The fixed drive roller (3021) is connected to a motor (303), and the moving drive roller (3022) is connected to a motor (304).

6. The fabric pre-tensioning and positioning device according to claim 5, characterized in that, The bottom of the lifting frame (301) is fixedly installed with a transmission box (305). The control mechanism includes screws (306) arranged on both sides inside the lifting frame (301) and sliders (307) connected to the screws (306). The sliders (307) on both sides are used to install the drive rollers (3022). The screws (306) on both sides extend through the transmission box (305) into the interior and are fitted with bevel gears (308). The threads of the screws (306) on both sides are opposite.

7. The fabric pre-tensioning and positioning device according to claim 6, characterized in that, The control mechanism also includes two retainers (309) disposed inside the transmission box (305). Each retainer (309) is rotatably connected to a bevel gear (310) that meshes with a bevel gear (308). A dual-axis motor (311) is disposed inside the transmission box (305) between the two retainers (309). The output shafts on both sides of the dual-axis motor (311) are respectively connected to the bevel gear (310) for transmission.

8. The fabric pre-tensioning and positioning device according to claim 7, characterized in that, The intermittent pressing assembly (5) includes a pressing support frame (501), the driving component includes an eccentric turntable (502) mounted on the support frame, a motor (503) connected to the eccentric turntable (502), vertical rods (504) mounted on both sides of the cutting table (1), a moving block (505) mounted on the vertical rod (504), a return spring (506) between the moving block (505) and the top of the vertical rod (504), an arc-shaped push plate (507) between the two moving blocks (505), and a pressure plate (508) fixedly mounted on the bottom of the arc-shaped push plate (507).

9. The fabric pre-tensioning and positioning device according to claim 8, characterized in that, The cutting assembly (4) includes a cutting frame (401), on which a linear track mechanism (403) including a motor (402) is provided. The linear track mechanism (403) includes a linear guide rail, a belt, and track sliders (404)(307) provided on the linear guide rail. An electric telescopic rod (405) is provided on the track sliders (404)(307), and a cutting blade (406) is provided at the end of the electric telescopic rod (405).

10. A fabric pre-tensioning and positioning device according to claim 9, characterized in that, The fabric cutting table (1) is equipped with a controller (7) on one side. The controller (7) is electrically connected to the rotating expansion shaft (203), the edge position monitoring sensor (211), the cylinder telescopic rod one (212), the cylinder telescopic rod two (213), the motor one (303), the motor two (304), the dual-axis motor (311), the motor three (503), the motor four (402), and the electric telescopic rod (405) via wires.

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