A special fixture for testing the elasticity of spandex fabric
Patent Information
- Application Number
- CN202521995794.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-09-17
AI Technical Summary
首先，凸条与凹槽仅形成线性或窄带接触，当测试拉力增大时，单位面积压强不足，布料易从咬合界面滑出
[0015] The beneficial effects of this utility model are as follows: This utility model adds a pair of second clamping parts to hold the part of the fabric that extends out after being held by the corresponding first clamping parts, and keeps the second clamping parts and the first clamping parts in close contact on adjacent surfaces. Thus, by using the second clamping parts set on the side opposite to the tensile force to hold the extended part of the fabric and abut against the first clamping parts, a frictional force or constraint force is generated under the action of tensile force to prevent the fabric from sliding out of the first clamping parts, thereby achieving two-stage clamping and anti-slip.
Smart Images
Figure CN224861400U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fabric testing technology, and in particular to a special fixture for testing the elasticity of spandex fabric. Background Technology
[0002] In the field of physical performance testing of textiles, elasticity testing of elastic fabrics such as spandex requires applying a precise and controllable tensile force to the sample. During the test, the stable clamping of the fabric by the fixture is the key to ensuring the accuracy of the data. Existing technologies generally adopt friction-type fixture structures, such as convex-groove interlocking structures. Matching convex strips and grooves are set on the moving and stationary clamping surfaces of the fixture. When pressed, the convex strips embed into the grooves to increase the contact area with the fabric, attempting to improve anti-slip properties. Alternatively, friction treatment can be added to the surface, such as attaching triangular soft rubber strips or sandpaper to the clamping surface, relying on local frictional resistance to prevent slippage.
[0003] However, the above method still has significant drawbacks when testing highly elastic or smooth fabrics: First, the convex strip and the groove only form a linear or narrow band contact. When the test tension increases, the pressure per unit area is insufficient, and the fabric is easy to slip out from the interlocking interface.
[0004] Secondly, friction material failure: the rubber strip / sandpaper is prone to wear and delamination under repeated high pressure clamping, resulting in a decrease in anti-slip performance and uncontrolled "crawling" at the edges. For high-resilience fabrics such as spandex, the fabric will gradually slip off from the clamp entry end during continuous stretching, and the existing structure lacks an effective blocking mechanism.
[0005] Especially for spandex fabrics with an elasticity of ≥300%, their strong shrinkage characteristics exacerbate the above problems. The anti-slip capability of existing clamps is difficult to meet the reliability requirements of testing. There is an urgent need for a clamping solution that can actively constrain fabric displacement and adapt to high elasticity. Utility Model Content
[0006] In view of this, the purpose of this utility model is to provide a special fixture for testing the elasticity of spandex fabric, so as to solve the above-mentioned technical problems.
[0007] To achieve the above objectives, this utility model provides a special fixture for testing the elasticity of spandex fabric, comprising: platform; The first clamping mechanism includes two first clamping bodies disposed opposite each other on the platform for clamping the fabric. A drive mechanism is used to drive the two first clamping bodies to move in opposite directions along the platform, thereby applying a test tensile force to the clamped fabric. The second clamping mechanism includes two second clamping bodies, each of which is disposed on the side of the corresponding first clamping body away from the other first clamping body, for clamping the portion of the fabric that extends out after being clamped by the corresponding first clamping body, and keeping the adjacent surfaces of the second clamping body and the corresponding first clamping body in close contact or abutment, thereby preventing the fabric from sliding relative to the first clamping body in the direction of tension during testing.
[0008] As a preferred embodiment of this utility model, the first clip specifically includes: The first support has a first support surface on one side for supporting the fabric; The first pressure plate is slidably disposed on the upper end of the first support surface, and the lower end of the first pressure plate and the first support surface form a first clamping space for clamping the fabric. A first adjustment structure is used to drive the first pressure plate to move relative to the first support surface.
[0009] As a preferred embodiment of this utility model, the first adjustment structure includes: The first threaded rod has one end rotatably connected to the upper end of the first pressure plate, and the other end threadedly connected to the first threaded groove opened in the first bracket. The first guide rod has one end fixedly connected to the upper end of the first pressure plate, and the other end slidably engaged with the first guide groove formed in the first bracket.
[0010] As a preferred embodiment of this utility model, the driving mechanism includes: The top of the slider is fixedly connected to the bottom of the first bracket, and the bottom slides in a groove opened in the platform. A double-rod hydraulic cylinder is located in the middle of the platform, and its two output rods are fixedly connected to the corresponding first brackets.
[0011] As a preferred embodiment of this utility model, the second clip specifically includes: The second support has a second support surface on one side for attaching the fabric. The second pressure plate is slidably disposed on the upper end of the second support surface, and a second clamping space for clamping the fabric is formed between the lower end of the second pressure plate and the upper end of the second support surface. The second threaded rod has one end rotatably connected to the upper end of the second pressure plate, and the other end threadedly connected to the second threaded groove opened in the second bracket. The second guide rod has one end fixedly connected to the upper end of the second pressure plate, and the other end slidably engaged with the second guide groove opened in the second bracket.
[0012] As a preferred embodiment of this utility model, the lower end of the first pressure plate is provided with a first protrusion, and the first support surface of the first bracket is provided with a first groove that matches the first protrusion.
[0013] As a preferred embodiment of this utility model, the lower end of the second pressure plate and the upper end of the second support surface are alternately provided with a second protrusion and a second groove.
[0014] As a preferred embodiment of this utility model, the first pressure plate and the corresponding second pressure plate each have a first extension plate and a second extension plate formed on their contact surfaces to increase the contact area.
[0015] The beneficial effects of this utility model are as follows: This utility model adds a pair of second clamping parts to hold the part of the fabric that extends out after being held by the corresponding first clamping parts, and keeps the second clamping parts and the first clamping parts in close contact on adjacent surfaces. Thus, by using the second clamping parts set on the side opposite to the tensile force to hold the extended part of the fabric and abut against the first clamping parts, a frictional force or constraint force is generated under the action of tensile force to prevent the fabric from sliding out of the first clamping parts, thereby achieving two-stage clamping and anti-slip. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the first support and the first pressure plate of this utility model; Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.
[0018] The following are labeled in the diagram: 1. Platform; 2. Slide groove; 3. First support; 4. Slider; 5. First pressure plate; 6. First threaded rod; 7. First threaded groove; 8. First guide rod; 9. First guide groove; 10. First protrusion; 11. First groove; 12. Second support; 13. Second pressure plate; 14. Second protrusion; 15. Second groove; 16. Second threaded rod; 17. Second threaded groove; 18. Second guide rod; 19. Second guide groove; 20. First extension plate; 21. Second extension plate; 22. Double-rod hydraulic cylinder. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0021] like Figure 1 and Figure 2 As shown, a special fixture for testing the elasticity of spandex fabric includes: a platform 1; a first clamping mechanism, which includes two first clamping bodies disposed opposite each other on the platform 1 for clamping the fabric; a driving mechanism for driving the two first clamping bodies to move in opposite directions along the platform 1, thereby applying a test tensile force to the clamped fabric; and a second clamping mechanism, which includes two second clamping bodies, each second clamping body being disposed on the side of the corresponding first clamping body away from the other first clamping body, for clamping the portion of the fabric that extends out after being clamped by the corresponding first clamping body, and maintaining close contact or abutment between the adjacent surfaces of the second clamping body and the corresponding first clamping body, thereby preventing the fabric from sliding relative to the first clamping body in the direction of tensile force during testing; The above technical solution can prevent the fabric from sliding relative to the first clamp during testing through a two-stage clamping anti-slip mechanism. In use, the first clamp is used to clamp both sides of the fabric, ensuring that a portion of the fabric extends out of the first clamp. Then, the second clamp is used to clamp the extended fabric, keeping the second clamp in close contact with the first clamp. The drive mechanism is activated to move the two first clamps in opposite directions, thereby applying a test tension to the fabric. The second clamp, located on the opposite side of the tension, clamps the extended section of the fabric and contacts or abuts against the first clamp. Under the action of the tension, a frictional or restraining force is generated to prevent the fabric from sliding out of the first clamp, thus achieving two-stage clamping anti-slip.
[0022] like Figure 3As shown, in this embodiment, the first clamp specifically includes: a first bracket 3, one side of which has a first support surface for supporting fabric; a first pressure plate 5, which is slidably disposed on the upper end of the first support surface, and a first clamping space for clamping fabric is formed between the lower end of the first pressure plate 5 and the first support surface; and a first adjustment structure for driving the first pressure plate 5 to move relative to the first support surface. Specifically, the first adjustment structure includes: a first threaded rod 6, one end of which is rotatably connected to the upper end of the first pressure plate 5, and the other end of which is threadedly connected to the first threaded groove 7 opened in the first bracket 3; and a first guide rod 8, one end of which is fixedly connected to the upper end of the first pressure plate 5, and the other end of which is slidably engaged with the first guide groove 9 opened in the first bracket 3. The above technical solution can clamp the fabric through the first clamp. When in use, the fabric is placed flat on the first support surface of the first bracket 3, and the first threaded rod 6 is rotated to push the first pressure plate 5 close to the first support surface until the first pressure plate 5 and the first support surface are in contact with the fabric, thereby completing the clamping of the fabric.
[0023] like Figure 3 As shown, in this embodiment, the second clamping device includes: a second bracket 12, one side of which has a second support surface for attaching the fabric; a second pressure plate 13, which is slidably disposed on the upper end of the second support surface, and a second clamping space for clamping the fabric is formed between the lower end of the second pressure plate 13 and the upper end of the second support surface; a second threaded rod 16, one end of which is rotatably connected to the upper end of the second pressure plate 13, and the other end of which is threadedly connected to the second threaded groove 17 opened in the second bracket 12; and a second guide rod 18, one end of which is fixedly connected to the upper end of the second pressure plate 13, and the other end of which is slidably engaged with the second guide groove 19 opened in the second bracket 12. The above technical solution can clamp the extended end of the fabric through the second clamping body, place the extended end of the fabric onto the second support surface of the second bracket 12, and rotate the second threaded rod 16 to push the second pressure plate 13 close to the second support surface, thereby clamping the extended end of the fabric.
[0024] like Figure 1 and Figure 2 As shown, in this embodiment, the driving mechanism includes: a slider 4, the top of which is fixedly connected to the bottom end of the first bracket 3, and the bottom of which is slidably engaged with the slide groove 2 opened in the platform 1; and a double-rod hydraulic cylinder 22, which is located in the middle of the platform 1, and its two output rods are respectively fixedly connected to the corresponding first bracket 3. The above technical solution can apply a test tensile force to the fabric. After the first clamp holds the fabric, the double-rod hydraulic cylinder 22 can be activated to push the two first supports 3 to move in opposite directions, thus applying a test tensile force to the fabric. When the first support 3 moves, the slider 4 will slide along the slide groove 2 in the platform 1, thereby guiding the movement of the first support 3 and preventing the first support 3 from deviating.
[0025] like Figure 3 and Figure 4 As shown, in this embodiment, the lower end of the first pressure plate 5 is provided with a first protrusion 10, and the first support surface of the first bracket 3 is provided with a first groove 11 that matches the first protrusion 10; the lower end of the second pressure plate 13 and the upper end of the second support surface are alternately provided with a second protrusion 14 and a second groove 15. The above technical solution can increase the contact area between the fabric and the clamp by using a concave-convex structure in the contact area between the clamp and the fabric, thereby improving the anti-slip effect between the fabric and the first clamp and the second clamp.
[0026] like Figure 3 As shown, in this embodiment, the first pressure plate 5 and the corresponding second pressure plate 13 each have a first extension plate 20 and a second extension plate 21 formed on their contact surfaces. The above technical solution can increase the contact area between the adjacent surfaces of the first clamping body and the second clamping body, and ensure the stability of the two-stage clamping and anti-slip mechanism.
[0027] Working principle: When in use, the fabric is laid flat on the first support surface of the first bracket 3. The first threaded rod 6 is rotated to push the first pressure plate 5 close to the first support surface until the first pressure plate 5 and the first support surface are in contact with the fabric, thereby completing the clamping of the fabric by the first clamp and ensuring that a part of the fabric extends out from the first clamp. The extended end of the fabric is placed on the second support surface of the second bracket 12. The second threaded rod 16 is rotated to push the second pressure plate 13 close to the second support surface, thereby clamping the extended end of the fabric. The second clamp clamp clamps the extended fabric and keeps the second clamp and the first clamp in close contact. Once the fabric is clamped, the double-bar hydraulic cylinder 22 is activated to push the two first supports 3 to move in opposite directions, applying a test tension to the fabric. When the first supports 3 move, the slider 4 slides along the groove 2 in the platform 1, thereby guiding the movement of the first supports 3 and preventing the first supports 3 from deviating. The second clamping body, located on the opposite side of the tension, clamps the extension of the fabric and contacts or abuts against the first clamping body. Under the action of the tension, a frictional force or constraint force is generated to prevent the fabric from sliding out of the first clamping body, thus achieving two-stage clamping and anti-slip.
[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
[0029] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A special fixture for testing the elasticity of spandex fabric, comprising: Platform (1); The first clamping mechanism includes two first clamping bodies disposed opposite each other on the platform (1) for clamping the fabric; A drive mechanism is used to drive the two first clamps to move in opposite directions along the platform (1) to apply a test tension to the clamped fabric. The fixture is characterized in that it further includes: The second clamping mechanism includes two second clamping bodies, each of which is disposed on the side of the corresponding first clamping body away from the other first clamping body, for clamping the portion of the fabric that extends out after being clamped by the corresponding first clamping body, and keeping the adjacent surfaces of the second clamping body and the corresponding first clamping body in close contact or abutment, thereby preventing the fabric from sliding relative to the first clamping body in the direction of tension during testing.
2. The special fixture for testing the elasticity of spandex fabric according to claim 1, characterized in that, The first clip specifically includes: The first support (3) has a first support surface on one side for supporting the fabric; The first pressure plate (5) is slidably disposed on the upper end of the first support surface, and the lower end of the first pressure plate (5) and the first support surface form a first clamping space for clamping the fabric. A first adjustment structure is used to drive the first pressure plate (5) to move relative to the first support surface.
3. The special fixture for testing the elasticity of spandex fabric according to claim 2, characterized in that, The first adjustment structure includes: The first threaded rod (6) has one end rotatably connected to the upper end of the first pressure plate (5), and the other end is threadedly connected to the first threaded groove (7) opened in the first bracket (3). The first guide rod (8) has one end fixedly connected to the upper end of the first pressure plate (5), and the other end is slidably engaged with the first guide groove (9) opened in the first bracket (3).
4. The special fixture for testing the elasticity of spandex fabric according to claim 3, characterized in that, The drive mechanism includes: The top of the slider (4) is fixedly connected to the bottom of the first bracket (3), and the bottom is slidably engaged with the groove (2) opened in the platform (1); A double-rod hydraulic cylinder (22) is located in the middle of the platform (1), and its two output rods are fixedly connected to the corresponding first bracket (3).
5. The special fixture for testing the elasticity of spandex fabric according to claim 3, characterized in that, The second clip specifically includes: The second support (12) has a second support surface on one side for attaching the fabric; The second pressure plate (13) is slidably disposed on the upper end of the second support surface, and a second clamping space for clamping the fabric is formed between the lower end of the second pressure plate (13) and the upper end of the second support surface. The second threaded rod (16) has one end rotatably connected to the upper end of the second pressure plate (13), and the other end is threadedly connected to the second threaded groove (17) opened in the second bracket (12); The second guide rod (18) has one end fixedly connected to the upper end of the second pressure plate (13), and the other end is slidably engaged with the second guide groove (19) opened in the second bracket (12).
6. The special fixture for testing the elasticity of spandex fabric according to claim 5, characterized in that, The lower end of the first pressure plate (5) is provided with a first protrusion (10), and the first support surface of the first bracket (3) is provided with a first groove (11) that matches the first protrusion (10).
7. The special fixture for testing the elasticity of spandex fabric according to claim 6, characterized in that, The lower end of the second pressure plate (13) and the upper end of the second support surface are alternately provided with a second protrusion (14) and a second groove (15).
8. The special fixture for testing the elasticity of spandex fabric according to claim 7, characterized in that, The first pressure plate (5) and the corresponding second pressure plate (13) each have a first extension plate (20) and a second extension plate (21) formed on their contact surfaces to increase the contact area.