A fabric stretching detection device

Abstract

The invention relates to the technical field of cloth detection, and specifically discloses a cloth stretching detection device. A frame is provided with two clamping mechanisms arranged opposite to each other up and down, the clamping mechanisms include a positioning frame and two clamping units, the clamping units include a clamping plate, a moving part, an elastic part 1, a nail plate and a nail rod, the clamping plate is slidably connected with the positioning frame, a clamping tooth is arranged on the inner side surface of the clamping plate, the moving part is arranged at the outer side of the clamping plate, the elastic part 1 is arranged between the clamping plate and the moving part, the nail plate is arranged between the clamping plate and the moving part, and is slidably connected with the moving part up and down, the nail rod is arranged on the inner side of the nail plate, one end of the nail rod is fixedly connected with the nail plate, and the other end movably passes through the clamping plate, and the nail rod in the upper clamping mechanism is inclined upward, and the nail rod in the lower clamping mechanism is inclined downward; when the end of a thicker elastic cloth is clamped and fixed by two clamping plates in the clamping mechanism, the nail rod can be inserted into the cloth and is not easy to be separated from the cloth, and the fixing effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of cloth detection, and in particular to a cloth stretching detection device. Background Art

[0002] Fabric is a commonly used material in decoration, including chemical fiber carpets, non-woven wall cloths, linen, nylon, colored tape, flannel and other fabrics. After the fabric is produced, it is usually necessary to conduct tensile strength testing.

[0003] When the two ends of the cloth are clamped by a clamping device and stretched, for thicker elastic cloth, it is easy to deform due to force. The cloth will become thinner after stretching and easily detach from the clamping device, which will affect the detection of the cloth.

[0004] The patent document with the authorization announcement number CN217654881U discloses a cloth tensile strength detection device, and the fixing process of the cloth by the device includes: firstly, pulling out the latch to make the limit block and the limit plate disengage from the limit, opening the clamping piece, lifting the cloth pressing roller from the positioning seat, making the positioning ring disengage from the positioning groove, and then pulling the cloth pressing roller outward to make the clamping block disengage from the limit of the clamping seat, taking out the cloth pressing roller, loosening the bolt between the fixed plate and the cloth pressing roller, putting one end of the cloth between the clamping block and the cloth pressing roller, and then tightening the bolt between the fixed plate and the cloth pressing roller so that the clamping block and the cloth pressing roller press the cloth tightly, and then sending the cloth pressing roller into the fixed clamping block and the movable clamping block. The cloth moves along the space between the fixed clamp block and the movable clamp block with the cloth pressing roller in the arc groove between the clamp blocks. At the same time, the cloth pressing roller is rotated in the opposite direction of the cloth stretching to make the cloth wrap around the cloth pressing roller. Then the clamp block is embedded in the clamp seat. After that, the positioning ring is placed in the positioning groove to limit the clamp block and the clamp seat. Then the clamping piece is pressed on the positioning seat to limit the cloth pressing roller by the clamp plate. Then the pin is inserted into the limiting block through the limiting plate to fix the limiting piece and the positioning seat. In this way, the two ends of the cloth are respectively installed in the cloth pressing rollers in the two clamps. The above process is cumbersome, which will reduce the detection efficiency of the cloth, and the structure is complicated and inconvenient to use. Summary of the invention

[0005] The present invention provides a cloth stretching detection device, aiming to solve the problem in the related art that it is inconvenient to clamp and fix thick elastic cloth, which will affect the detection of the cloth.

[0006] A cloth stretch detection device comprises a frame, on which two clamping mechanisms are mounted, the upper clamping mechanism can move up and down, the clamping mechanism comprises a positioning frame and two clamping units arranged opposite to each other on the positioning frame, and the positioning frame is connected to the frame;

[0007] The clamping unit includes a clamping plate, a moving part, an elastic part, a nail plate and a nail rod, the clamping plate is slidably connected to the positioning frame and can move along the arrangement direction of the two clamping units, the inner side surface of the clamping plate is provided with clamping teeth, the moving part is arranged at the outer side of the clamping plate and can move along the arrangement direction of the two clamping units, the elastic part is arranged between the clamping plate and the moving part and can push the clamping plate, the nail plate is arranged between the clamping plate and the moving part and is slidably connected to the moving part up and down, and can drive the nail plate to move when the moving part moves, the nail rod is arranged on the inner side of the nail plate, one end of which is fixedly connected to the nail plate, and the other end movably passes through the clamping plate, and the nail rod in the clamping mechanism on the upper side is inclined upward, and the nail rod in the clamping mechanism on the lower side is inclined downward, and the nail rod can be inserted into the cloth.

[0008] The beneficial effects of the present invention are as follows: when the end of a thicker elastic fabric is clamped and fixed by two clamping plates in the clamping mechanism, the nail rod will be inserted into the fabric and will not easily fall out of the fabric, so that when the fabric is subjected to tension testing, the influence caused by deformation of the elastic fabric can be avoided, and the fixing effect is good.

[0009] Preferably, an accommodating groove is provided on the lower side surface of the clamping teeth in the clamping mechanism on the upper side and on the upper side surface of the clamping teeth in the clamping mechanism on the lower side, and the nail rod is arranged in the accommodating groove. The effect is that the nail rod fits in the accommodating groove so that the nail rod and the clamping teeth are arranged in close proximity, which can avoid obstruction of the clamping plate to the clamping of the cloth and enable the nail rod to be smoothly inserted into the cloth.

[0010] Preferably, a bidirectional screw is rotatably mounted on the positioning frame, and the two movable parts in the two clamping units are threadedly connected to the bidirectional screw. The effect is that by controlling the rotation of the bidirectional screw, the two movable parts can be moved closer to or away from each other, that is, the movable parts can be moved along the arrangement direction of the two clamping units.

[0011] Preferably, the clamping unit also includes a limit assembly, which includes a stop member and a sliding member, wherein the stop member is slidably connected to the clamping plate and can move along the arrangement direction of the two clamping units. When the two clamping plates in the two clamping units approach each other to a set distance, the two stop members connected to the two clamping plates can stop, the sliding member is slidably connected to the clamping plate, and a slot corresponding to the sliding member is provided on the moving member, the sliding member is fitted with the stop member, and the fitting surfaces of the two are inclined surfaces, so that when the stop member pushes the sliding member, the sliding member can move in the direction of the slot and be inserted into the slot. The effect is that the stop member, the sliding member and the slot provided on the moving member can enable the device to clamp and fix thinner cloth, and when clamping and fixing, the nail rod will not extend out of the accommodating slot, that is, it will not affect the clamping of the cloth by the clamping plate.

[0012] Preferably, the limiting assembly also includes a second elastic member, which is arranged between the sliding member and the clamping plate. When the sliding member moves in the direction of the slot, the second elastic member can apply a force in the opposite direction to the sliding member. The effect is that when clamping and fixing a thinner fabric, the sliding member will move in the direction of the slot and be inserted into the slot, and the second elastic member will be stretched. When the clamping of the fabric is released, the second elastic member can reset the sliding member.

[0013] Preferably, the sliding member includes a slider 1 and a slider 2, wherein the slider 1 is arranged on a side facing the slot and can be inserted into the slot, the slider 2 has an inclined surface and fits with the stop member, and the slider 2 is slidably connected to the slider 1.

[0014] Preferably, the sliding member further comprises an elastic member three, and the elastic member three is arranged between the sliding block one and the sliding block two, and when the stop member pushes the sliding block two, the sliding block two can exert a force on the elastic member three and compress the elastic member three.

[0015] Preferably, a cross bar is provided on the upper part of the frame, the height of the cross bar on the frame can be adjusted, a tension sensor is provided on the cross bar, a telescopic driving member is provided between the tension sensor and the clamping mechanism on the upper side, and the telescopic driving member can drive the clamping mechanism on the upper side to move up and down.

[0016] By adopting the above technical scheme, the beneficial effect of the present invention is as follows: when the end of the thicker elastic fabric is clamped and fixed by the two clamping plates in the clamping mechanism, the nail rod in the upper clamping mechanism will be inserted into the fabric upward at an angle, and the nail rod in the lower clamping mechanism will be inserted into the fabric downward at an angle, so that when the fabric is subjected to tension testing, the nail rod is not easy to detach from the fabric, thereby avoiding the influence caused by deformation when the elastic fabric is stretched, and the fixing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the upper clamping mechanism of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the lower clamping mechanism of the present invention.

[0020] Figure 4 It is a schematic diagram of the arrangement structure of two clamping units of the present invention.

[0021] Figure 5 It is a schematic diagram of the installation structure of the limiting component of the present invention.

[0022] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0023] Figure 7 It is a schematic structural diagram of the splint of the present invention.

[0024] Figure 8 It is a schematic diagram of the installation structure of the nail rod of the present invention.

[0025] Reference numerals:

[0026] 1. Frame; 2. Clamping mechanism; 21. Positioning frame;

[0027] 221, clamping plate; 2211, opening; 222, moving part; 2221, slot; 2222, latch; 223, elastic part 1; 224, nail plate; 225, nail rod; 226, clamping teeth; 2261, receiving groove; 227, fixing block; 2271, slot; 23, bidirectional screw;

[0028] 241, stop member; 242, sliding member; 2421, slider 1; 24211, slide groove; 2422, slider 2; 2423, elastic member 3; 243, elastic member 2;

[0029] 31. Cross bar; 32. Tension sensor; 33. Telescopic drive member. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] like Figure 1 As shown, the cloth stretching detection device according to the embodiment of the present invention comprises a frame 1, on which two clamping mechanisms 2 arranged opposite to each other up and down are mounted, and the upper clamping mechanism 2 can move up and down.

[0032] Specifically, a cross bar 31 is provided on the upper part of the frame 1, and the height of the cross bar 31 on the frame 1 can be adjusted. A tension sensor 32 is provided on the cross bar 31, and a telescopic driving member 33 is provided between the tension sensor 32 and the upper clamping mechanism 2. The telescopic driving member 33 can be an electric push rod, and can drive the upper clamping mechanism 2 to move up and down. The upper and lower ends of the cloth can be clamped and fixed by the two clamping mechanisms 2. After the cloth is fixed, the telescopic driving member 33 is controlled to retract, and the cloth can be stretched and tested. The tension sensor 32 can detect the tension applied to the cloth.

[0033] Among them, by adjusting the height of the cross bar 31, the distance between the two clamping mechanisms 2 can be adjusted, which can be suitable for the detection of cloths of different lengths.

[0034] like Figures 1 to 3 As shown, the clamping mechanism 2 includes a positioning frame 21 and two clamping units relatively arranged on the positioning frame 21, and the positioning frame 21 is connected to the frame 1; specifically, the positioning frame 21 in the upper clamping mechanism 2 is fixedly connected to the telescopic end at the bottom of the telescopic driving member 33, and the positioning frame 21 in the lower clamping mechanism 2 is fixedly connected to the frame 1. By controlling the two clamping units to approach each other, the end of the cloth can be clamped and fixed.

[0035] like Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the clamping unit includes a clamping plate 221, a moving member 222, an elastic member 223, a nail plate 224 and a nail rod 225.

[0036] The clamping plate 221 is slidably connected to the positioning frame 21 and can move along the arrangement direction of the two clamping units. The direction between the two clamping units is defined as the inner direction. Clamping teeth 226 are provided on the inner side surface of the clamping plate 221. The moving member 222 is arranged on the outer side of the clamping plate 221 and can move along the arrangement direction of the two clamping units. The elastic member 223 is arranged between the clamping plate 221 and the moving member 222 and can push the clamping plate 221.

[0037] Specifically, a bidirectional screw 23 is rotatably mounted on the positioning frame 21, and the two moving parts 222 in the two clamping units are threadedly connected to the bidirectional screw 23, so that when the bidirectional screw 23 is controlled to rotate, the two moving parts 222 can approach or move away from each other, that is, the moving parts 222 can move along the arrangement direction of the two clamping units.

[0038] The movable member 222 is an L-shaped structure, and an opening 2211 is provided at the upper end of the splint 221. The upper part of the movable member 222 is movably inserted in the opening 2211 of the splint 221, and the lower part of the movable member 222 is located on the outer side of the splint 221. The elastic member 223 can be a spring, and its extension direction is the same as the arrangement direction of the two clamping units. The two ends of the elastic member 223 are respectively fixedly connected to the splint 221 and the movable member 222.

[0039] The bidirectional screw 23 is controlled to rotate so that the two moving parts 222 in the clamping mechanism 2 approach each other. The moving part 222 applies a force to the elastic part 223 and can push the two clamping plates 221 to approach each other through the elastic part 223. When the two clamping plates 221 approach each other to a set distance, the end of the cloth can be clamped and fixed.

[0040] It can be understood that the bidirectional screw 23 installed in the upper clamping mechanism 2 is located on the upper side of the clamping plate 221, and the bidirectional screw 23 installed in the lower clamping mechanism 2 is located on the lower side of the clamping plate 221, so that the upper and lower clamping mechanisms 2 can clamp and fix the upper and lower ends of the cloth respectively.

[0041] like Figures 2 to 4 As shown, the nail plate 224 is arranged between the clamping plate 221 and the moving member 222, and is connected to the moving member 222 for sliding up and down. When the moving member 222 moves, it can drive the nail plate 224 to move. The nail rod 225 is arranged on the inner side of the nail plate 224, one end of which is fixedly connected to the nail plate 224, and the other end moves through the clamping plate 221. The nail rod 225 in the upper clamping mechanism 2 is tilted upward, and the nail rod 225 in the lower clamping mechanism 2 is tilted downward, and the nail rod 225 can be inserted into the cloth.

[0042] Specifically, a fixed block 227 is fixedly connected to the outer side surface of the nail plate 224, and a slot 2271 extending up and down is opened on the fixed block 227. A pin 2222 is fixedly connected to the side of the movable member 222, and the pin 2222 is movably inserted in the slot 2271, so that the nail plate 224 and the movable member 222 are connected by sliding up and down, the nail rod 225 is connected by sliding with the splint 221, and the direction in which the nail rod 225 can slide relative to the splint 221 is the same as the inclination direction of the nail rod 225.

[0043] In addition, a receiving groove 2261 is provided on the lower side surface of the clamping tooth 226 in the upper clamping mechanism 2 and on the upper side surface of the clamping tooth 226 in the lower clamping mechanism 2. The nail rod 225 can slide in the receiving groove 2261, and in the initial state when the clamping mechanism 2 is not clamping and fixing the cloth, the inner end of the nail rod 225 is located in the receiving groove 2261.

[0044] When clamping and fixing a thicker elastic fabric, the upper end of the fabric is placed between the two clamping plates 221 in the upper clamping mechanism 2, and the lower end of the fabric is placed between the two clamping plates 221 in the lower clamping mechanism 2, and the bidirectional screw 23 is controlled to rotate so that the two moving parts 222 in the clamping mechanism 2 are close to each other. The moving part 222 will exert a force on the elastic part 1 223, and can push the two clamping plates 221 close to each other through the elastic part 1 223. After the two clamping plates 221 are respectively in contact with the two sides of the fabric, as the bidirectional screw 23 drives the two moving parts 222 to continue to approach each other, the elastic part 1 223 will be compressed, and a thrust force will be exerted on the clamping plate 221, and the two clamping plates 221 will be compressed. The plate 221 can clamp and fix the fabric, and the latch 2222 will apply a force to the nail plate 224, so that the nail plate 224 has a tendency to move inward. With the cooperation of the nail rod 225 and the clamping plate 221, the nail plate 224 in the upper clamping mechanism 2 will move along an inclined upward trajectory, and the nail plate 224 in the lower clamping mechanism 2 will move along an inclined downward trajectory, and the nail rods 225 on both sides will be inserted into the fabric, so that the fabric can be fixed. At this time, the telescopic drive member 33 is controlled to contract, so that the fabric can be tested for tension, and during the tension test, the nail rod 225 is not easy to detach from the fabric, and the fixing effect is better.

[0045] There are multiple clamping teeth 226 on the inner side of the clamping plate 221, and the multiple clamping teeth 226 are arranged in the up-down direction. There are also multiple nail rods 225 arranged on the inner side of the nail plate 224, both of which can improve the fixing effect of the cloth.

[0046] In some embodiments, Figure 5 and Figure 6As shown, the clamping unit also includes a limit assembly, which includes a stop member 241, a sliding member 242 and an elastic member 243. The stop member 241 is slidably connected to the clamping plate 221 and can move along the arrangement direction of the two clamping units. The stop member 241 has a U-shaped structure, and its inner end is located between the two clamping plates 221. When the two clamping plates 221 in the two clamping units approach each other to a set distance, the two stop members 241 connected to the two clamping plates 221 can stop, and the sliding member 242 is slidably connected to the clamping plate 221. The sliding direction of the sliding member 242 is consistent with the direction of the stop member 241. The sliding direction is perpendicular, and a slot 2221 corresponding to the sliding member 242 is provided on the upper part of the moving member 222. The sliding member 242 is fitted with the stop member 241, and the fitting surfaces of the two are inclined surfaces, so that when the stop member 241 pushes the sliding member 242, the sliding member 242 can move in the direction of the slot 2221 and be inserted into the slot 2221. The elastic member 243 can be a spring and is arranged between the sliding member 242 and the clamping plate 221. When the sliding member 242 moves in the direction of the slot 2221, the elastic member 243 can apply a force in the opposite direction to the sliding member 242.

[0047] The sliding member 242 includes a sliding member 1 2421, a sliding member 2422 and an elastic member 3 2423. The sliding member 1 2421 is arranged on a side facing the card slot 2221 and can be inserted into the card slot 2221. The sliding member 2422 has an inclined surface and fits the inclined surface on the stop member 241. The sliding member 1 2421 is provided with a sliding groove 24211. The sliding member 2422 slides in the sliding groove 24211. The sliding direction of the sliding member 2422 is the same as that of the sliding member 2423. The sliding direction of the movable member 242 is the same, the two ends of the elastic member 243 are respectively fixedly connected to the clamping plate 221 and the slider 2422, the elastic member 3 2423 can be a spring sheet and is arranged in the slide groove 24211, and its two ends are respectively fixedly connected to the slider 1 2421 and the slider 2 2422, when the stop member 241 pushes the slider 2 2422, the slider 2 2422 can exert a force on the elastic member 3 2423 and compress the elastic member 3 2423.

[0048] When clamping and fixing thinner cloth, it is impossible to insert the nail rod 225 into the cloth to improve the fixing effect. For this purpose, a limit assembly is provided, and its specific working process is as follows: the bidirectional screw 23 is controlled to rotate so that the two moving parts 222 in the clamping mechanism 2 are close to each other, and the two clamping plates 221 are pushed close to each other by the elastic member 1 223. Since the cloth is thinner, before the two clamping plates 221 clamp the cloth, the two stop members 241 in the two clamping units will first stop each other. As the two clamping plates 221 continue to approach each other, the stop member 241 will push the slider 2 2422. Under the action of the two inclined surfaces on the stop member 241 and the slider 2 2422, the slider 2 2422 It will move in the direction of slider 1 2421, and the elastic member 3 2423 will push the slider 1 2421 to move in the direction of the slot 2221, and the elastic member 243 will be stretched. After the slider 1 2421 is inserted into the slot 2221, the slider 1 2421 connects the moving member 222 and the clamping plate 221 together, that is, the moving member 222 and the clamping plate 221 will move synchronously, and the two-way screw 23 will continue to be controlled to rotate until the two clamping plates 221 clamp and fix the cloth. At this time, the thinner cloth can be well clamped and fixed by the two clamping plates 221 and the clamping teeth 226 arranged on the inner side of the clamping plate 221, and the nail rod 225 will not extend out of the accommodating groove 2261 at this time.

[0049] After completing the tension test, after controlling the stop member 241 to return to its original position, the slider 2 2422 will move away from the slider 1 2421 under the action of the tension of the elastic member 2 243 and keep in contact with the stop member 241, and the slider 1 2421 will be disengaged from the slot 2221 under the pulling of the elastic member 3 2423.

[0050] In addition, the minimum thickness value of the aforementioned thicker cloth is set to a, and the maximum thickness value of the thinner cloth is set to b. The limit assembly can enable the device to complete the clamping and fixing of the cloth with a thickness less than b. When the thickness of the cloth is greater than a, during the process of clamping and fixing the cloth, the two stop members 241 in the clamping mechanism 2 will not stop, that is, the setting of the stop member 241, the sliding member 242 and the elastic member 243 will not affect the clamping and fixing of the cloth with a thickness greater than a.

[0051] When clamping and fixing the cloth with a thickness between a and b, the bidirectional screw 23 is controlled to rotate so that the two moving parts 222 in the clamping mechanism 2 approach each other, and the two clamping plates 221 are pushed closer to each other by the elastic member 1 223. The two clamping plates 221 will first fit on both sides of the cloth, and the bidirectional screw 23 is continued to be controlled to rotate. The elastic member 1 223 will be compressed and push the clamping plate 221, and the moving part 222 and the clamping plate 221 will move relative to each other, that is, the slider 1 2421 and the slot 2221 will be misaligned. Next, when the two clamping plates 221 continue to approach each other to clamp the cloth, the stop The resisting member 241 will continue to push the slider 2 2422 as described above, and the slider 2 2422 will move in the slide groove 24211 and compress the elastic member 3 2423. However, since the slider 1 2421 and the slot 2221 are misaligned, the slider 1 2421 cannot be inserted into the slot 2221. The subsequent clamping and fixing process is the same as the clamping and fixing process for the thicker elastic fabric described above, and will not be repeated here. That is, the setting of the slider 1 2421, the slider 2 2422 and the elastic member 3 2423 will not affect the clamping and fixing of the fabric with a thickness between a and b.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cloth stretching detection device, comprising a frame, characterized in that: Two clamping mechanisms are installed on the frame and are arranged opposite to each other. The upper clamping mechanism can move up and down. The clamping mechanism includes a positioning frame and two clamping units arranged opposite to each other on the positioning frame. The positioning frame is connected to the frame. The clamping unit comprises a clamping plate, a moving part, an elastic part, a nail plate and a nail rod. The clamping plate is slidably connected with the positioning frame and can move along the arrangement direction of the two clamping units. A clamping tooth is arranged on the inner side surface of the clamping plate. The moving part is arranged at the outer side of the clamping plate and can move along the arrangement direction of the two clamping units. The elastic part is arranged between the clamping plate and the moving part and can push the clamping plate. The nail plate is arranged between the clamping plate and the moving part and is connected with the moving part for sliding up and down. When the moving part moves, it can drive the nail plate to move. The nail rod is arranged on the inner side of the nail plate, one end of which is fixedly connected with the nail plate, and the other end of which moves through the clamping plate. The nail rod in the upper clamping mechanism is tilted upward, and the nail rod in the lower clamping mechanism is tilted downward, and the nail rod can be inserted into the cloth. The clamping unit includes a limit assembly, which includes a stop member and a sliding member. The stop member is slidably connected to the clamping plate and can move along the arrangement direction of the two clamping units. When the two clamping plates in the two clamping units are close to a set distance, the two stop members connected to the two clamping plates can stop. The sliding member is slidably connected to the clamping plate, and a slot corresponding to the sliding member is provided on the moving member. The sliding member and the stop member are fitted together, and the fitting surfaces of the two are both inclined surfaces, so that when the stop member pushes the sliding member, the sliding member can move in the direction of the slot and be inserted into the slot.

2. The cloth stretching detection device according to claim 1, characterized in that: The lower side surface of the clamping teeth in the upper clamping mechanism and the upper side surface of the clamping teeth in the lower clamping mechanism are both provided with accommodating grooves, and the nail rods are arranged in the accommodating grooves.

3. The cloth stretching detection device according to claim 1, characterized in that: A bidirectional screw is rotatably mounted on the positioning frame, and two moving parts in the two clamping units are both connected to the bidirectional screw threads, so that when the bidirectional screw rotates, the two moving parts can approach or move away from each other.

4. The cloth stretching detection device according to claim 1, characterized in that: The limiting assembly also includes a second elastic member, which is arranged between the sliding member and the clamping plate. When the sliding member moves toward the slot, the second elastic member can exert a force in the opposite direction on the sliding member.

5. The cloth stretching detection device according to claim 4, characterized in that: The sliding member includes a slider 1 and a slider 2. The slider 1 is arranged on a side facing the slot and can be inserted into the slot. The slider 2 has an inclined surface and fits with the stop member. The slider 2 is slidably connected to the slider 1.

6. The cloth stretching detection device according to claim 5, characterized in that: The sliding member also includes an elastic member three, which is arranged between the sliding block one and the sliding block two. When the stop member pushes the sliding block two, the sliding block two can exert a force on the elastic member three and compress the elastic member three.

7. The cloth stretching detection device according to claim 1, characterized in that: A cross bar is arranged on the upper part of the frame, the height of the cross bar on the frame can be adjusted, a tension sensor is arranged on the cross bar, a telescopic driving member is arranged between the tension sensor and the upper clamping mechanism, and the telescopic driving member can drive the upper clamping mechanism to move up and down.

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