Anti-tensile Test Device and Test Method for Knitted Fabrics

Abstract

This application relates to the field of testing equipment, and particularly to a tensile resistance testing device and method for knitted fabrics, including a lifting body. An active clamp is installed inside the lifting body in a lifting and sliding manner. The lifting body is also provided with a fixed clamp. The fixed clamp includes a first clamping plate, a second clamping plate, a locking rod, and a locking ring. The first clamping plate is fixedly installed on the lifting body. One end of the locking rod is fixedly connected to the first clamping plate. The second clamping plate is provided with a through hole for the locking rod to pass through. The locking ring is threadedly sleeved on the locking rod. A telescopic groove is formed on the top side of the second clamping plate. A rack is telescopically arranged in the telescopic groove. A rotating port communicating with the telescopic groove is formed on one side of the second clamping plate close to the first clamping plate. A gear is rotatably installed inside the rotating port. The gear meshes with the rack. The fixed clamp and the active clamp have the same structure and are symmetrically arranged up and down. This application has the effect of improving the accuracy of experimental results.

Description

Technical Field

[0001] This application relates to the field of testing equipment, and particularly to a tensile resistance testing device and testing method for knitted fabrics. Background Art

[0002] Tensile resistance testing devices are widely used in the field of textile quality inspection. By simulating the tensile stress under actual use conditions, the strength and durability of fabrics are evaluated. This technology is of great significance for ensuring product quality, optimizing production processes, and meeting the diverse needs of the market. With the rapid development of the textile industry, the requirements for tensile resistance testing equipment are also increasing day by day. In particular, continuous breakthroughs have been made in terms of accuracy, reliability, and automation level, promoting the progress and technological innovation of the entire industry.

[0003] Currently, when testing the tensile properties of knitted fabrics, the clamping and stretching operations of samples are usually achieved by the cooperation of a fixed clamp and a movable clamp.

[0004] However, in some cases such as smooth fabric surfaces, clamp wear, or operator errors, when the movable clamp and the fixed clamp hold the fabric for stretching, the fabric may slip. If the moving distance of the fabric after slipping is small, it is very difficult for the experimenter to detect the fabric slipping and repeat the experiment, and then directly use the experimental results of the slipped fabric to calculate the tensile strength, thereby reducing the accuracy of the experimental results. Summary of the Invention

[0005] In order to improve the accuracy of experimental results, this application provides a tensile resistance testing device and testing method for knitted fabrics.

[0006] The tensile resistance testing device and testing method for knitted fabrics provided by this application adopt the following technical solutions:

[0007] The tensile resistance testing device for knitted fabrics includes a lifting body. An active clamp is installed in the lifting body in a lifting and sliding manner. The lifting body is also provided with a fixed clamp. The fixed clamp includes a first clamping plate, a second clamping plate, a locking rod, and a locking ring. The first clamping plate is fixedly installed on the lifting body. One end of the locking rod is fixedly connected to the first clamping plate. The second clamping plate is provided with a through hole for the locking rod to pass through. The locking ring is threadedly sleeved on the locking rod. A telescopic groove is opened on the top side of the second clamping plate. A rack is telescopically arranged in the telescopic groove. A rotating port communicating with the telescopic groove is opened on one side of the second clamping plate close to the first clamping plate. A gear is rotatably installed in the rotating port. The gear meshes with the rack. The fixed clamp and the active clamp have the same structure and are symmetrically arranged up and down.

[0008] By adopting the above technical solution, using the meshing structure of the rack and the gear, when the fabric slips, the fabric drives the rack to move through the gear, thereby facilitating the detection of whether there is a slipping situation. This design significantly improves the reliability of the test results and ensures the accuracy of the tensile property measurement.

[0009] Optionally, a pressure sensor is fixedly installed on the inner bottom wall of the telescopic groove. A push plate and a pressing plate are arranged between the rack and the pressure sensor. A spring is fixedly installed between the push plate and the pressing plate, and the spring is used to drive the pressing plate and the push plate to move away from each other.

[0010] By adopting the above technical solution, when the fabric slips and drives the rack to move, the rack will push the push plate to compress the spring, so that the pressing plate moves towards the pressure sensor and applies pressure. Whether the fabric slips is judged by the change in the pressure received by the pressure sensor, so that it is convenient for the experimenter to find that the fabric slips and re-conduct the experiment.

[0011] Optionally, a sliding groove is formed on the side of the second clamping plate close to the first clamping plate. The sliding groove is located below the rotating opening. A slider is slidably inserted into the sliding groove. An activity opening communicating with the rotating opening is formed on the inner wall of the sliding groove. The slider is hinged with a limiting plate. The limiting plate passes through the activity opening and enters the rotating opening. When the slider abuts against the inner bottom wall of the sliding groove, the limiting plate abuts against the inner wall of the activity opening away from the first clamping plate, and the limiting plate is used to limit the rotation direction of the gear.

[0012] By adopting the above technical solution, the rotation direction of the rack driven by the fabric slipping through the gear is opposite to the moving direction of the rack driven by the spring. The mutual extrusion of the gear and the fabric can limit the movement of the rack driven by the spring. The rotation of the gear is clamped by the limiting plate, so as to further limit the movement of the rack driven by the spring.

[0013] Optionally, the activity opening is inclined from the end communicating with the rotating opening to the other end and gradually approaches the first clamping plate.

[0014] By adopting the above technical solution, the inclination direction of the activity opening is beneficial to guiding the tilting direction of the limiting plate, so as to facilitate the limiting plate to limit the rotation direction of the gear.

[0015] Optionally, an elastic block is embedded on the side of the slider away from the first clamping plate. When the slider abuts against the inner bottom wall of the sliding groove, the elastic block is compressed and flush with the side of the slider away from the first clamping plate. When the elastic block is not compressed, the elastic block protrudes from the side of the slider away from the first clamping plate.

[0016] By adopting the above technical solution, when the first clamping plate and the second clamping plate move away from each other to loosen the fabric, the elastic block drives the slider to move, so that the limiting plate stops restricting the rotation direction of the gear, and then it is convenient for the experimenter to adjust the position of the telescopic rod before the tensile test starts.

[0017] Optionally, an adjustment port communicating with the telescopic groove is formed on one side of the second clamping plate away from the first clamping plate, and an adjustment rod is threadedly inserted on the side of the rack away from the gear, and the adjustment rod slidably penetrates through the adjustment port.

[0018] By adopting the above technical solution, the adjustment rod is clamped with the adjustment port, so as to play a role in restricting the rack from sliding out of the telescopic groove.

[0019] Optionally, a support rod is arranged on one side of the second clamping plate away from the first clamping plate, the support rod is used to support the adjustment rod, and a suspension rod is fixedly installed on the support rod, and the suspension rod is L-shaped.

[0020] By adopting the above technical solution, before the lifting body drives the movable fixture to stretch the fabric, the suspension rod is hung on the second clamping plate, and the support rod supports the adjustment rod, so as to facilitate the reset of the adjustment rod.

[0021] Optionally, a rotating rod is coaxially arranged with the gear, the rotating rod rotatably penetrates through the gear, a rotating hole is formed in the second clamping plate, the rotating port communicates with the rotating hole, and the rotating rod rotatably penetrates through the rotating hole.

[0022] By adopting the above technical solution, the stable rotation of the gear is realized. Specifically, the gear is coaxially provided with a rotating rod, and the rotating rod is matched with the rotating hole on the second clamping plate to ensure that the gear can rotate smoothly when subjected to external forces, avoiding the problem of unstable clamping caused by the loosening or offset of the gear, thereby improving the overall reliability of the testing device.

[0023] Optionally, an elastic sleeve is sleeved on the part of the rotating rod outside the gear.

[0024] By adopting the above technical solution, sleeving an elastic sleeve on the part of the rotating rod outside the gear can effectively reduce the frictional damage between the rotating rod and external components, and improve the service life of the equipment. At the same time, it is also convenient for the gear to press the fabric.

[0025] The anti-tensile test method includes the following steps:

[0026] Use the movable fixture and the fixed fixture to clamp the fabric to be tested;

[0027] The lifting main body drives the movable fixture to rise until the fabric to be tested breaks and then stops;

[0028] Detect whether the rack moves; if so, re-detect the fabric slippage; if not, calculate the tensile property according to the tensile force required to break the fabric to be tested by the movable fixture.

[0029] By adopting the above technical solution, after the fabric is clamped and stretched, by detecting the change of the position of the rack, it can be accurately judged whether there is a slippage phenomenon in the fabric. Once it is found that the rack moves, it indicates that the fabric has slipped, and re-detection is required, thereby reducing the occurrence of data deviation caused by fixture wear or improper operation, and significantly improving the credibility and accuracy of the test results.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] The meshing design of the gear and the rack enables the tiny displacement of the fabric during the stretching process to be converted into an obvious mechanical movement, which is convenient for the experimenter to accurately judge whether there is a slippage phenomenon, and significantly improves the accuracy of the anti-tensile test results;

[0032] During the stretching of the fabric, the gear and the fabric are mutually extruded, thereby restricting the movement of the rack driven by the spring. Then, the rotation direction of the gear is restricted by the limit plate, thereby further reducing the situation of the rack being driven by the spring to move. Description of the Drawings

[0033] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0034] Figure 2 is the overall structural schematic diagram of the fixed fixture of the embodiment of the present application;

[0035] Figure 3 is Figure 2 the cross-sectional view at A-A;

[0036] Figure 4 is Figure 3 the cross-sectional view at A;

[0037] Figure 5 is the exploded view of the rotating rod and the gear of the embodiment of the present application.

[0038] Explanation of the reference numerals: 1, lifting body; 2, movable fixture; 3, fixed fixture; 31, first clamping plate; 32, second clamping plate; 33, locking rod; 34, locking ring; 4, telescopic groove; 5, rotating port; 6, rack; 7, gear; 8, rotating rod; 9, suspension rod; 10, elastic sleeve; 11, pressure sensor; 12, push plate; 13, pressing plate; 14, spring; 15, sliding groove; 16, slider; 17, limit plate; 18, movable port; 19, elastic block; 20, adjustment port; 21, adjustment rod; 22, support rod. Detailed Description of the Invention

[0039] The following will further elaborate on this application in conjunction with the attached Figures 1-5 drawings for a more detailed description.

[0040] An embodiment of this application discloses a tensile resistance testing device and testing method for knitted fabrics.

[0041] Referring to Figure 1 , the tensile resistance testing device for knitted fabrics includes a lifting body 1, a movable fixture 2 is installed inside the lifting body 1 for lifting and sliding, and the lifting body 1 is also provided with a fixed fixture 3.

[0042] Referring to Figure 2 and Figure 3 , the fixed fixture 3 includes a first clamping plate 31, a second clamping plate 32, a locking rod 33 and a locking ring 34. The first clamping plate 31 is fixedly installed on the inner bottom wall of the lifting body 1, one end of the locking rod 33 is fixedly connected to the first clamping plate 31, the second clamping plate 32 is provided with a through hole for the locking rod 33 to pass through, and the locking ring 34 is threadedly sleeved on the locking rod 33.

[0043] Place the fabric between the first clamping plate 31 and the second clamping plate 32, then rotate the locking ring 34, and the locking ring 34 drives the second clamping plate 32 to press the fabric tightly against the first clamping plate 31, thus facilitating the fixed fixture 3 to clamp the fabric. After the movable fixture 2 also clamps the fabric, the lifting body 1 drives the movable fixture 2 to rise, thereby stretching the fabric. After the fabric breaks, the lifting body 1 stops driving the movable fixture 2 to move. The experimenter calculates the tensile resistance performance of the fabric based on the tensile force required for the lifting body 1 to drive the movable fixture 2 to break the fabric.

[0044] Referring to Figure 3 and Figure 4 , a plurality of telescopic grooves 4 are provided on the top side of the second clamping plate 32, and a plurality of rotating openings 5 are provided on the side of the second clamping plate 32 close to the first clamping plate 31. The rotating openings 5 correspond to the telescopic grooves 4 one by one, and the rotating openings 5 are communicated with the telescopic grooves 4. A rack 6 is telescopically arranged in the telescopic groove 4, and a gear 7 meshing with the rack 6 is arranged inside the rotating opening 5. The gear 7 is coaxially provided with a rotating rod 8, and the rotating rod 8 rotates through the gear 7. The second clamping plate 32 is provided with a rotating hole, the rotating opening 5 is communicated with the rotating hole, and the rotating rod 8 rotates through the rotating hole.

[0045] The rotating hole penetrates through the second clamping plate 32 from one side to the other side, thus connecting each rotating opening 5 together. After the rotating rod 8 passes through the rotating hole and each gear 7, it facilitates the rotation of the gear 7 inside the rotating opening 5.

[0046] Referring to Figure 5, an elastic sleeve 10 is sleeved on the part of the rotating rod 8 located outside the gear 7. The elastic force of the elastic sleeve 10 blocks the rotating hole, thereby increasing the resistance of the rotating rod 8 inserted into the rotating hole, and further reducing the situation where the rotating rod 8 is automatically pulled out of the rotating hole.

[0047] When the fixed clamp 3 and the movable clamp 2 do not clamp the fabric, part of the gear 7 is outside the rotating port 5. When the fixed clamp 3 and the movable clamp 2 clamp the fabric, due to the elasticity of the elastic sleeve 10, the gear 7 is squeezed and retracted into the rotating port 5, and at the same time the gear 7 abuts against the fabric.

[0048] When the fixed clamp 3 and the movable clamp 2 clamp the fabric for stretching, if the fabric slips and moves, the fabric will drive the gear 7 to rotate, and the gear 7 will drive the rack 6 to move. The experimenter judges whether the fabric slips through the position change of the rack 6, so as to facilitate the experimenter to find that the fabric slips and restart the experiment, improving the accuracy of the anti-stretching detection result.

[0049] Refer to Figure 3 , a pressure sensor 11 is fixedly installed on the inner bottom wall of the telescopic groove 4. A push plate 12 and a pressing plate 13 are arranged between the rack 6 and the pressure sensor 11. A spring 14 is fixedly installed between the push plate 12 and the pressing plate 13. The spring 14 is used to drive the pressing plate 13 and the push plate 12 to move away from each other. The push plate 12 abuts against the rack 6, and the pressing plate 13 abuts against the pressure sensor 11.

[0050] The slipping of the fabric drives the gear 7 to rotate, and the gear 7 drives the rack 6 to move towards the pressure sensor 11 to squeeze the push plate 12. Then the push plate 12 presses the pressure sensor 11 through the spring 14 and the pressing plate 13, so that the pressure detected by the pressure sensor 11 changes. The lifting body 1 is integrated with a controller, and the controller analyzes the result detected by the pressure sensor 11 to obtain the pressure received by the pressure sensor 11. The experimenter judges whether the fabric slips through the change of the pressure received by the pressure sensor 11.

[0051] Refer to Figure 4 , a sliding groove 15 is opened on the side of the second clamping plate 32 close to the first clamping plate 31. The sliding groove 15 is located below the rotating port 5. A slider 16 is slidably penetrated in the sliding groove 15, and a movable port 18 communicating with the rotating port 5 is opened on the inner wall of the sliding groove 15. The slider 16 is hinged with a limiting plate 17, and the limiting plate 17 penetrates through the movable port 18 and enters the rotating port 5.

[0052] When the first clamping plate 31 and the second clamping plate 32 clamp the fabric, the slider 16 is squeezed and retracted inside the sliding groove 15, so that the slider 16 abuts against the inner bottom wall of the sliding groove 15. When the slider 16 abuts against the inner bottom wall of the sliding groove 15, the limiting plate 17 abuts against the inner wall of the movable port 18 far from the first clamping plate 31. When the elastic force of the spring 14 drives the rack 6 to move away from the pressure sensor 11, the limiting plate 17 is engaged with the gear 7. Since the limiting plate 17 abuts against the inner wall of the movable port 18 far from the first clamping plate 31, the limiting plate 17 cannot continue to rotate away from the first clamping plate 31, thus restricting the rotation direction of the gear 7. When the fabric slips, the fabric drives the gear 7, and the gear 7 pushes the limiting plate 17 to flip towards the first clamping plate 31, thus facilitating the rotation of the gear 7.

[0053] The movable port 18 is inclined such that it gradually approaches the first clamping plate 31 from one end communicating with the rotating port 5 to the other end. The inclination of the movable port 18 is beneficial to guiding the tilting direction of the limiting plate 17, thus facilitating the limiting plate 17 to limit the rotation direction of the gear 7.

[0054] An elastic block 19 is embedded on the side of the slider 16 far from the first clamping plate 31. When the slider 16 abuts against the inner bottom wall of the sliding groove 15, the elastic block 19 is compressed and flush with the side of the slider 16 far from the first clamping plate 31. When the elastic block 19 is not compressed, the elastic block 19 protrudes from the side of the slider 16 far from the first clamping plate 31.

[0055] After the first clamping plate 31 and the second clamping plate 32 release the fabric, the elastic block 19 drives the slider 16 to move towards the first clamping plate 31, so that the limiting plate 17 can rotate closer to or away from the first clamping plate 31 in the movable port 18, and further facilitate adjusting the top ends of each rack 6 to be in the same position. Before stretching the fabric, each rack 6 is in the same position, thus facilitating the experimenter to find that the fabric slips.

[0056] Refer to Figure 2 、 Figure 3 As shown in

[0057] The adjusting rod 21 is clamped with the adjusting port 20, thereby restricting the rack 6 from being pulled out of the telescopic slot 4. At the same time, after the rack 6 or the adjusting rod 21 is worn, the adjusting rod 21 can be unscrewed from the rack 6, thereby facilitating the replacement of the rack 6 and the adjusting rod 21. During the process of the movable fixture 2 and the fixed fixture 3 clamping the fabric, the experimenter may need to pull the fabric to adjust the position. When the experimenter pulls the fabric, the fabric will drive the gear 7 to move. The hanging rod 9 is hung on the second clamping plate 32, and the support rod 22 supports each adjusting rod 21, so as to facilitate the same length of each rack 6 extending out of the telescopic slot 4, and at the same time reduce the situation that the experimenter pulls the fabric to drive the gear 7 to rotate.

[0058] In the embodiment of the present application, the structures of the movable fixture 2 and the fixed fixture 3 are the same and are symmetrically arranged up and down.

[0059] The anti-tensile test method, using the anti-tensile test device of this embodiment, includes the following steps:

[0060] Use the movable fixture 2 and the fixed fixture 3 to clamp the fabric to be tested;

[0061] The lifting main machine drives the movable fixture 2 to rise until the fabric to be tested breaks and then stops;

[0062] Detect whether the rack 6 moves; if so, the fabric slips and is detected again; if not, calculate the tensile property according to the tensile force required when the movable fixture 2 pulls the fabric to be tested to break.

[0063] The implementation principle of the anti-tensile test device and test method for knitted fabric in the embodiment of the present application is as follows: At the beginning, the hanging rod 9 is hung on the second clamping plate 32, and the support rod 22 supports each adjusting rod 21, so as to facilitate the same length of each rack 6 extending out of the telescopic slot 4. The support rod 22 drives the adjusting rod 21 to abut against the inner bottom wall at one end of the adjusting port 20, thereby restricting the adjusting rod 21 from slipping inside the adjusting port 20, and further restricting the movement of the rack 6 and the rotation of the gear 7.

[0064] Place the fabric between the first clamping plate 31 and the second clamping plate 32, rotate the locking ring 34, the locking ring 34 drives the dripping clamping plate to move, and the second clamping plate 32 presses the fabric against the first clamping plate 31. After the second clamping plate 32 presses the fabric against the first clamping plate 31, the hanging rod 9 is removed from the second clamping plate 32, so as to facilitate the sliding of the adjusting rod 21 in the adjusting port 20, and further facilitate the movement of the rack 6 and the rotation of the gear 7.

[0065] After the first clamping plate 31 and the second clamping plate 32 clamp the fabric, the slider 16 is squeezed by the first clamping plate 31 and retracted into the sliding groove 15, so that the limiting plate 17 abuts against the inner wall of the movable port 18 away from the first clamping plate 31, thereby restricting the limiting plate 17 from flipping away from the first clamping plate 31. When the elastic force of the spring 14 drives the rack 6 to move, the limiting plate 17 is engaged with the gear 7, thereby restricting the movement of the rack 6. When the fabric slips, the fabric drives the gear 7 to rotate, and the limiting plate 17 flips towards the first clamping plate 31, so as to facilitate the rotation of the gear 7.

[0066] After that, the lifting body 1 drives the movable fixture 2 to rise to stretch the fabric until the fabric breaks and then stops. After the fabric breaks, the experimenter judges whether the fabric slips by observing whether the position of the gear 7 changes or whether the pressure detected by the pressure sensor 11 changes. If the fabric slips, the experimenter restarts the experiment. If the fabric does not slip, the experimenter calculates the tensile property according to the tensile force required for the movable fixture 2 to pull the fabric to be tested until it breaks.

[0067] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. The tensile test device for knitted fabrics is characterized by: The invention comprises a lifting body (1), wherein a movable clamp (2) is installed inside the lifting body (1) for lifting and sliding movement, and the lifting body (1) is also provided with a fixed clamp (3), wherein the fixed clamp (3) comprises a first clamping plate (31), a second clamping plate (32), a locking rod (33) and a locking ring (34), wherein the first clamping plate (31) is fixedly installed on the lifting body (1), one end of the locking rod (33) is fixedly connected to the first clamping plate (31), and the second clamping plate (32) is provided with a through hole for the locking rod (33) to pass through. The locking ring (34) is threadedly sleeved on the locking rod (33); a telescopic groove (4) is provided on the top side of the second clamping plate (32); a rack (6) is telescopically arranged in the telescopic groove (4); a rotating opening (5) connected to the telescopic groove (4) is provided on the side of the second clamping plate (32) close to the first clamping plate (31); a gear (7) is rotatably installed inside the rotating opening (5); the gear (7) is meshed with the rack (6); the fixed clamp (3) and the movable clamp (2) have the same structure and are symmetrically arranged up and down; A pressure sensor (11) is fixedly mounted on the inner bottom wall of the telescopic slot (4); a push plate (12) and a pressure plate (13) are provided between the rack (6) and the pressure sensor (11); a spring (14) is fixedly mounted between the push plate (12) and the pressure plate (13); the spring (14) is used to drive the pressure plate (13) and the push plate (12) to move away from each other; A sliding groove (15) is provided on a side of the second clamping plate (32) close to the first clamping plate (31), the sliding groove (15) being located below the rotating opening (5), a sliding block (16) being slidably penetrated inside the sliding groove (15), an active opening (18) connected to the rotating opening (5) being provided on the inner wall of the sliding groove (15), the sliding block (16) being hingedly connected to a limiting plate (17), the limiting plate (17) being penetrated through the active opening (18) and entering the rotating opening (5), when the sliding block (16) is in contact with the inner bottom wall of the sliding groove (15), the limiting plate (17) is in contact with the inner wall of the active opening (18) away from the first clamping plate (31), and the limiting plate (17) is used to limit the rotation direction of the gear (7).

2. The tensile strength test device for knitted fabrics according to claim 1, characterized in that: The movable opening (18) is arranged in an inclined manner from one end connected to the rotating opening (5) to the other end gradually approaching the first clamping plate (31).

3. The tensile strength test device for knitted fabrics according to claim 1, characterized in that: An elastic block (19) is embedded on the side of the slider (16) away from the first clamping plate (31); when the slider (16) abuts against the inner bottom wall of the sliding groove (15), the elastic block (19) is pressed to be flush with the side of the slider (16) away from the first clamping plate (31); when the elastic block (19) is not pressed, the elastic block (19) protrudes from the side of the slider (16) away from the first clamping plate (31).

4. The tensile strength test device for knitted fabrics according to claim 1, characterized in that: An adjustment opening (20) connected to the telescopic slot (4) is provided on a side of the second clamping plate (32) away from the first clamping plate (31), and an adjustment rod (21) is threadedly inserted on a side of the rack (6) away from the gear (7), and the adjustment rod (21) is slidably inserted into the adjustment opening (20).

5. The tensile strength test device for knitted fabrics according to claim 4, characterized in that: A support rod (22) is provided on a side of the second clamping plate (32) away from the first clamping plate (31), the support rod (22) being used to support the adjustment rod (21), and a suspension rod (9) is fixedly mounted on the support rod (22), the suspension rod (9) being L-shaped.

6. The tensile strength test device for knitted fabrics according to claim 1, characterized in that: The gear (7) is coaxially provided with a rotating rod (8), the rotating rod (8) rotatably penetrates the gear (7), the second clamping plate (32) is provided with a rotating hole, the rotating opening (5) is connected to the rotating hole, and the rotating rod (8) rotatably penetrates the rotating hole.

7. The tensile strength test device for knitted fabrics according to claim 6, characterized in that: The portion of the rotating rod (8) located outside the gear (7) is sleeved with an elastic sleeve (10).

8. A tensile test method, using the tensile test device for knitted fabrics as described in any one of claims 1 to 7, characterized in that: The following steps are involved: Using a movable clamp (2) and a fixed clamp (3) to clamp the fabric to be tested; The lifting host drives the movable clamp (2) to rise until the fabric to be tested breaks and then stops; Check whether the rack (6) moves; if so, the fabric is slipped and retested; if not, the tensile performance is calculated based on the pulling force required when the movable clamp (2) pulls the fabric to be tested to break.

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