Color fastness detection device for fiber textile fabric

Abstract

The invention discloses a fiber textile fabric color fastness detection device, the fiber textile fabric color fastness detection device comprises a positioning member, the positioning member comprises a fixedly arranged positioning clamp and a movably arranged positioning clamp, and the two positioning clamps are used for clamping an elastic fabric together; and the stretching distance-fixing assembly is matched with the movably arranged positioning clamp to control the initial stretching deformation amount of the elastic fabric. According to the fiber textile fabric color fastness detection device provided by the invention, a complete detection system of fabric clamping, precise stretching, dynamic friction and springback speed control is constructed through collaborative design of the positioning piece, the stretching distance control assembly, the springback speed reduction assembly and the friction driving assembly; a solution is provided for three core pain points of'difficult reproduction of initial deformation ', 'neglect of rebound secondary color migration' and'disjunction of detection scene and reality 'of a traditional device.

Description

Technical Field

[0001] This invention belongs to the field of material property testing technology. Specifically, it relates to a color fastness testing device for fiber textile fabrics, and more specifically, to a special testing device for color fastness of elastic fiber textiles (such as knitted fabrics, spandex blended fabrics, etc.) in the field of textile testing technology. Background Technology

[0002] Knitted fabrics, spandex blends, and other elastic fiber textiles, due to their excellent stretch and fit, are widely used in sportswear, underwear, and home textiles. Their colorfastness to rubbing directly affects the product's lifespan—if the colorfastness is substandard, color fading is likely to occur during wear and washing, affecting not only appearance but also potentially causing dye transfer to skin or other clothing, leading to quality disputes. Therefore, conducting testing according to standards such as GB / T3920-2008 "Textiles - Tests for Colorfastness to Rubbing" is a crucial step in quality control for textile manufacturers and acceptance testing by downstream brand owners.

[0003] However, elastic fabrics possess inherent "stretch-rebound" mechanical properties and are often under tension during actual use. This objective situation places special demands on the effectiveness of color fastness testing. Existing testing devices have significant limitations in addressing these requirements, resulting in accuracy and repeatability of test results that fail to meet industry standards. The tensile state of elastic fabrics during actual use alters fiber spacing, surface tension, and the bonding strength between dyes and fibers. Only when the initial state during testing matches this actual state can the test results be considered valuable. However, existing devices cannot ensure consistent initial tensile conditions for multiple tests of the same batch of samples. The resulting color fastness rating deviation often exceeds one grade, failing to meet the requirement in GB / T250-2008 that "the rating difference for repeated tests of the same sample should not exceed one grade," making it difficult to use as a stable basis for quality judgment.

[0004] Furthermore, elastic fabrics inevitably rebound after stretching. In real-world scenarios (such as after washing and drying clothes, or during physical activity while wearing them), the fibers rub against each other and are compressed during the rebound process, which can lead to color fading. This phenomenon directly affects the colorfastness of the product in actual use, but existing testing devices do not include this phenomenon in their testing scope. After the friction test, the color fading during the fabric's rebound stage is not collected and evaluated. The final test result only reflects "static friction color fading," which differs from the true colorfastness in actual use. This can easily lead to misjudgments of product quality, and downstream applications may encounter the problem of "passing the test but fading during use." Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a device for testing the color fastness of fiber textile fabrics.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this invention includes: The positioning element includes a fixed positioning clamp and a movable positioning clamp, the two positioning clamps being used to jointly clamp the elastic fabric. A stretching and positioning assembly, which cooperates with the movable positioning clamp to control the initial stretching deformation of the elastic fabric, the stretching and positioning assembly includes a floor, at least two positioning columns fixed to one side of the floor, and a positioning frame and a limiting plate slidably disposed on the positioning columns, the limiting plate being used to abut against the movable positioning clamp to limit the stretching position; A rebound deceleration component is disposed between the positioning member and the stretching and spacing component to reduce the rebound speed of the elastic fabric. A friction drive assembly is mounted above the floor and is used to perform friction detection on stretched elastic fabric. The friction drive assembly includes a stand, a guide rail fixed between the stands, a walking frame slidably connected to the guide rail, and a friction roller rotatably connected to the bottom of the walking frame.

[0007] Preferably, the positioning clamp includes a U-shaped frame, a clamping plate slidably connected within the frame, a plurality of connecting rods inserted into the frame and fixedly connected at the bottom to the clamping plate, and a handle fixed to the top of the plurality of connecting rods; a pre-tensioning spring is fixedly connected within the frame, and the other end of the pre-tensioning spring is fixedly connected to the clamping plate.

[0008] In this invention, addressing the core pain points of traditional devices such as "difficulty in reproducing initial deformation after multiple detections" and "ignoring secondary color migration during springback," a collaborative design of "positioning component + tension and spacing assembly + springback deceleration assembly + friction drive assembly" is employed: The stretching and spacing component can precisely control the initial stretching deformation of elastic fabrics, solving the problem of unquantitative control of deformation caused by traditional manual operation, ensuring consistent initial state in multiple tests, and reducing color fastness rating deviation. The rebound deceleration component can reduce the rebound speed of the fabric, reduce the secondary color migration caused by inter-fiber friction during the rebound process, and fill the gap in traditional testing that ignores "dynamic rebound color fading". The friction drive component can perform stable friction detection on stretched fabrics, achieving an overall upgrade from "static friction detection" to "stretch-friction-rebound detection that closely resembles actual usage scenarios," significantly improving detection repeatability and accuracy.

[0009] In this invention, the clamping structure design of "U-shaped frame + sliding clamping plate + pre-tensioning spring" solves the problem of "uneven clamping force leading to abnormal local deformation of fabric" in traditional clamping devices. The pre-tension spring provides a uniform and stable clamping force, and the fabric can be quickly clamped by operating the handle, avoiding local wrinkles or uneven force on the fabric caused by inconsistent force when manually clamping. Multiple connecting rods synchronously pull the clamping plate to move, ensuring that the clamping plate is held parallel to the frame, further guaranteeing the flatness of the fabric after clamping, providing a stable foundation for subsequent stretching and friction testing, and reducing testing errors caused by clamping issues.

[0010] Preferably, at least two guide components are provided between the two positioning clamps. The guide components include a guide tube and a guide post slidably connected within the guide tube. The guide tube is fixedly connected to one of the positioning clamps, and the guide post is fixedly connected to the other positioning clamp.

[0011] In this invention, the design of the guide assembly (guide tube + guide post) solves the problem of "movement direction deviation" of the movable positioning clamp during the stretching process: The sliding fit between the guide tube and the guide post restricts the movable positioning clamp to move only in a straight line, preventing the positioning clamp from shifting laterally during stretching, which could lead to excessive or insufficient stretching of the fabric in some areas. Ensure that the direction of force during fabric stretching is consistent with the fabric texture, reduce fiber misalignment caused by offset, further guarantee the accuracy of initial stretching deformation, and improve the repeatability of multiple tests.

[0012] At least two guide components are symmetrically distributed along the width direction of the positioning clamp (i.e., perpendicular to the fabric stretching direction) and are specifically installed at both ends of the positioning clamp frame. This ensures that when the movable positioning clamp moves along the fabric stretching direction (length direction), the guide column always slides axially within the guide tube, effectively limiting the lateral offset of the movable positioning clamp and preventing uneven local stretching of the fabric due to the offset of the positioning clamp.

[0013] Preferably, the spacer column has at least two guide slots distributed along its length, and the spacer frame is slidably disposed on the guide slots; a positioning rod is inserted into the spacer frame, one end of the positioning rod extends to the outside of the spacer frame and is fixedly connected to a handle, and the other end extends into the guide slot and is fixedly connected to a positioning plate; the positioning plate is in close contact with the inner wall of the guide slot, and a positioning spring is fixedly connected to one side of the positioning plate, and the other end of the positioning spring is fixedly connected to the spacer frame.

[0014] In this invention, the problem of "inability to accurately adjust and fix deformation" in traditional tensioning devices is solved through a refined design of "fixed-distance column guide groove + positioning rod + positioning plate + positioning spring". Multiple guide grooves on the spacer column can achieve quantitative adjustment of different stretch lengths (such as 10% or 20% of the fabric length) to meet the testing requirements of different elastic fabrics. The positioning rod and positioning plate, together with the positioning spring, can stably fix the spacer frame in the target guide groove position, avoiding deformation deviation caused by displacement of the spacer frame during the stretching process, ensuring that the stretching parameters of each test are completely consistent, and further reducing rating deviation.

[0015] Preferably, the guide rail is divided into a friction area, a raised area, and an idle area along its length. The idle area is higher than the friction area, and there are smooth transition arc-shaped guide surfaces between the friction area and the raised area, and between the raised area and the idle area. A servo motor and a rope winding roller are fixedly connected to the upright frame. The rope winding roller is driven by the servo motor, and a traction rope is wound on the rope winding roller. The other end of the traction rope is fixedly connected to the traveling frame. Traveling wheels are rotatably connected to both sides of the top of the traveling frame, and the traveling wheels slide in cooperation with the guide rail.

[0016] In this invention, the problems of "friction path deviation and inaccurate number / pressure" in traditional manual friction head movement are addressed by automating friction detection through a design of "guide rail partitioning + servo motor + rope winding roller": The guide rail is divided into a friction zone (with a slope to ensure uniform friction pressure), a raised zone (smooth transition without jamming), and an idle zone (to avoid interference from the friction rollers during rebound), ensuring a stable friction process and not affecting subsequent rebound detection. The servo motor drives the rope winding roller to retract and extend the traction rope, which can precisely control the reciprocating speed and friction count of the walking frame, replacing manual operation and avoiding errors such as "skewed friction path and inaccurate friction duration", thus improving the accuracy and stability of friction detection.

[0017] Preferably, it further includes a timed rebound assembly, which includes a trigger plate, a driven rope, a mounting base, a rotating rod, and a hook; the trigger plate is rotatably connected to one side of one of the guide rails, and a first return spring is fixedly connected to one side of the trigger plate, the other end of the first return spring being fixedly connected to the guide rail; the mounting base is fixed to the limiting plate, the rotating rod is rotatably connected between the two mounting bases, the hook is fixed to the rotating rod, and the frame of the movable positioning clamp has a hanging opening adapted to the hook; one end of the driven rope is connected to the trigger plate, and the other end is connected to a protrusion on the rotating rod. The statement "A first reset spring is fixedly connected to one side of the trigger plate, and the other end of the first reset spring is fixedly connected to the guide rail" is followed by the additional content: "The fixed end of the first reset spring is located on the side wall of the guide rail near the raised area, and the connection point is lower than the rotation axis of the trigger plate; in the initial state, the first reset spring is in a naturally extended state, pulling the end of the trigger plate away from the walking wheel downwards, so that the end of the trigger plate near the walking wheel is higher than the upper surface of the raised area of ​​the guide rail, forming an 'upturned' posture, ensuring that the walking wheel can accurately squeeze the upturned end of the trigger plate when it moves from the friction area to the raised area."

[0018] In this invention, the design of the timed rebound component solves the problem of traditional detection methods requiring manual intervention to detect the connection between friction and rebound. Through the linkage logic of "walking wheel squeezing trigger plate → driven rope pulling rotating rod → hook disengaging from hanging port", the fabric rebound is automatically triggered after the friction detection is completed, without the need for manual process switching, reducing the time difference or operation deviation caused by human operation. The second reset spring ensures a stable fit between the hook and the hanging port, while the first reset spring ensures the trigger plate is reset. This achieves a seamless connection between the "friction-rebound" detection and the overall detection process, improving detection efficiency while ensuring consistency in each connection process and further enhancing detection reliability.

[0019] Preferably, the rebound deceleration assembly includes felt strips fixed to opposite sides of the two spacers, and a deceleration frame integrally formed with both sides of the positioning clamp's frame; the deceleration frame has a deceleration groove, a brake block is rotatably connected in the deceleration groove, and a stop bar is fixedly connected in the deceleration groove. The brake block is rotatably connected to the inner wall of the deceleration groove via a horizontal pin, which is located slightly below the center of the brake block. Initially, the side of the brake block furthest from the stop bar makes slight contact with the felt strip under its own weight, without affecting the normal stretching of the fabric. When the fabric stretches, the movable positioning clamp drives the deceleration frame to move away from the fixed positioning clamp. The friction of the felt strip on the brake block causes it to rotate around the pin axis away from the stop bar, disengaging the brake block from the felt strip without significant damping. When the fabric rebounds, the deceleration frame moves in the opposite direction to the fixed positioning clamp, reversing the direction of the friction of the felt strip on the brake block. This drives the brake block to rotate around the pin axis towards the stop bar until its sidewall abuts against the stop bar. The stop bar restricts the brake block from further rotation. At this point, the brake block and felt strip are in close contact, and the friction damping of the felt strip reduces the moving speed of the deceleration frame and the movable positioning clamp, thereby slowing down the fabric rebound speed. In this invention, the core blind spot of "ignoring secondary color migration due to rebound" in traditional devices is addressed through a damping design using "felt strip + one-way brake block + stop bar": When the fabric is stretched, the brake block is squeezed and automatically pops open, without hindering normal stretching; when the fabric rebounds, the stop strip restricts the rotation of the brake block, so that the brake block and the felt strip are in close contact to generate stable damping and slow down the rebound speed. It effectively reduces the frequency and intensity of friction between fabric fibers during the rebound process, avoids the transfer of non-target colors caused by fiber friction, and makes the test results more consistent with the dynamic color fading scenario of "stretching-rebound" in actual wear, thus improving the authenticity of the test.

[0020] Preferably, it also includes a color-fading receiving component, which includes at least two test fabrics. The test fabrics are disposed between the clamping plate of the positioning clamp and the elastic fabric, and are clamped and fixed together with the elastic fabric by the clamping plate and the frame.

[0021] In this invention, the design of the color-fading receiving component (test cloth) fills the gap in traditional testing methods that "only focus on rubbing color fading and ignore rebound color fading": The test cloth is clamped and fixed to the fabric. During the rebound process, the color fading from the fabric can be directly transferred to the test cloth, achieving dual detection of "friction color fading + rebound color fading". To avoid the problems of traditional testing that only relies on rubbing color fading rating, which leads to the omission of rebound color fading in actual use and the overly optimistic rating results, this method makes the color fastness testing dimensions more complete and the rating results more in line with the actual use effect.

[0022] Preferably, the outer peripheral wall of the friction roller is detachably wrapped with a standard friction medium. In this invention, the design of the friction roller with "detachable standard friction medium + annular elastic buckle" solves the problem of detection deviation caused by color absorption after repeated use of traditional friction media. The ring-shaped elastic buckle allows for quick disassembly and replacement of the friction medium (such as pure cotton friction cloth), ensuring that the friction medium used in each batch of testing is in a clean state. To avoid the problem of "color fading of the friction medium itself interfering with the test results" in subsequent tests due to the old friction cloth absorbing the dye from the previous test, this method meets the standard requirement of "consistency" of the friction medium for color fastness testing and improves the repeatability of the test.

[0023] Preferably, a top plate is fixedly connected to the guide column connected to the movable positioning clip on the side away from the elastic fabric, and an electric telescopic rod is fixedly connected to the guide tube connected to the fixed positioning clip on the opposite side; the top plate is located on the telescopic path of the telescopic end of the electric telescopic rod.

[0024] In this invention, the problem of "uneven force application and unstable stretching speed" in traditional manual stretching is solved by using an "electric telescopic rod + top plate" design. The electric telescopic rod can provide a uniform and stable pushing force, and drive the movable positioning clamp to move through the top plate, ensuring that the force is stable and the speed is controllable during the fabric stretching process; To avoid fabric deformation fluctuations caused by "sudden force" or "gradual changes in force" during manual stretching, further ensure the consistency of the initial stretching state, reduce detection errors caused by instability in the stretching process, and improve the repeatability of multiple tests.

[0025] It should be noted that the test cloth is a white pure cotton cloth that meets the standards for color fastness testing of textiles (such as the friction cloth specified in GB / T3920-2008). Its purpose is to collect the dye that is shed from the elastic fabric during the stretching-friction-rebound process. After the test is completed, the color fastness can be analyzed in the following ways: 1. Compare the test cloth with the standard color card (such as GB / T250-2008 "Textiles - Tests for Color Fastness - Assessment of Color Change - Gray Spectrum Card") to determine the degree of color fading; 2. Measure the dye absorbance of the test cloth with a spectrophotometer to quantify the amount of dye shed and achieve accurate analysis of color fastness.

[0026] Compared with the prior art, the advantages of the present invention include: (1) The present invention provides a color fastness testing device for fiber textile fabrics. Through the combination of "floor + fixed column + fixed frame + limiting plate", the fabric stretch deformation (such as 10% or 20% of the fabric length) can be quantitatively locked by adjusting the position of the fixed frame in the guide groove of the fixed column. The limiting plate and the movable positioning clamp abut against each other to fix the stretch position, ensuring that the initial stretch state of each test is completely consistent. The initial deformation is the "benchmark condition" for color fastness testing of elastic fabrics (such as the fabric is often in a stretched state during actual wear). If the benchmark is inconsistent, the subsequent friction test results are incomparable. This component upgrades the test from "experience operation" to "precise and controllable" through "quantitative adjustment + mechanical positioning", directly reducing the rating error caused by the fluctuation of the initial state.

[0027] (2) The present invention provides a color fastness testing device for fiber textile fabrics. Traditional devices only detect "static rubbing color fading". However, elastic fabrics have a "stretch-rebound" cycle in actual use (such as after wearing and washing). During rebound, the friction between fibers will generate secondary color migration (additional color fading that is not the target of rubbing detection), which leads to the traditional test results being higher than the color fastness in actual use. This solution reduces the rebound speed of the fabric by using a rebound deceleration component, which reduces the frequency and intensity of fiber friction during rebound, avoids interference from secondary color migration, and makes the test scenario fit the actual use logic of "stretch-rubbing-rebound". If the traditional test does not exclude rebound color fading, it will misjudge the total color fading of "rubbing color fading + rebound color fading" as "rubbing color fading", or the rating will be too optimistic because rebound color fading is not included. This component directly suppresses secondary color migration by controlling the speed, ensuring that the test results only reflect the color fastness of the "target rubbing process" and improving the authenticity of the rating.

[0028] (3) The present invention provides a color fastness testing device for fiber textile fabrics. Traditional devices directly perform friction testing on relaxed fabrics, while elastic fabrics are often in a stretched and taut state in actual use (such as cuffs and collars). At this time, the fiber gaps and surface tension are very different from the relaxed state, and the color fading characteristics are completely different. This solution first fixes the fabric to the actual stretched state by the stretching and spacing component, and then performs friction testing by the friction driving component, so as to ensure that the state of the test object is consistent with the actual use.

[0029] (4) The color fastness testing device for fiber textile fabrics provided by the present invention adopts a "fixed + movable" double positioning clamp design for the positioning component. With the clamping plate and pre-tightening spring inside the positioning clamp, it can provide uniform clamping force and avoid fabric wrinkles and uneven local force caused by manual clamping. At the same time, the symmetrical design of the double positioning clamp ensures that the force direction and texture are consistent when the fabric is stretched, avoiding excessive or insufficient local stretching caused by clamping deviation. The fabric clamping and unclamping can be quickly completed by operating the handle without the need for a complicated fixing structure, reducing the difficulty of manual operation. At the same time, the stable clamping ensures that the fabric does not fall off or shift during subsequent stretching, friction and rebound processes, avoiding test interruption or invalid results due to clamping problems.

[0030] (5) The color fastness testing device for fiber textile fabrics provided by the present invention has a continuous process of “positioning clamping → stretching and spacing component shaping → friction drive component testing → rebound deceleration component speed control”, which eliminates the need for manual switching of testing steps (such as manually adjusting the stretching state, manually moving the friction head, or manually triggering the rebound), thus avoiding testing deviations caused by time and force differences in manual operation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is an overall schematic diagram of a fiber textile fabric color fastness testing device according to the present invention. Figure 2 This is a schematic diagram of the positioning clip in this invention; Figure 3 This is an exploded view of the structure of a fiber textile fabric color fastness testing device according to the present invention; Figure 4 This is a schematic diagram of the clamping plate in this invention; Figure 5 This is a schematic diagram of the rebound deceleration assembly in this invention; Figure 6 This is a schematic diagram of the mounting base in this invention; Figure 7 This is a schematic diagram of the trigger plate in this invention; Figure 8 This is a schematic diagram of the friction drive assembly in this invention; Figure 9 This is a schematic diagram of the structure of the electric telescopic rod in this invention; Figure 10 This is a schematic diagram of the distance-fixing frame in this invention.

[0033] Figure label: 1. Positioning clamp; 11. Plate frame; 12. Clamping plate; 13. Connecting rod; 14. Handle; 15. Preload spring; 16. Guide tube; 17. Guide post; 18. Floor; 19. Spacer post; 110. Guide groove; 111. Spacer frame; 112. Limiting plate; 113. Positioning rod; 114. Handle; 115. Positioning plate; 116. Positioning spring; 117. Trigger plate; 118. Driven rope; 119. Mounting base; 120. Rotating rod; 121. Protruding plate; 122. Hook; 123. Hanging port; 124. Second return spring; 125. Top plate; 126. Electric telescopic rod; 2. Friction drive assembly; 21. Frame; 22. Guide rail; 23. Walking frame; 24. Walking wheel; 25. Rope winding roller; 26. Traction rope; 27. Friction roller; 28. Servo motor; 3. Rebound deceleration assembly; 31. Felt strip; 32. Deceleration frame; 33. Brake block; 34. Stop bar; 35. Test cloth. Detailed Implementation

[0034] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0035] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0037] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0038] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] The present invention aims to introduce and explain the structural composition of a color fastness testing device for fiber textile fabrics and the cooperation relationship between the various components. Unless otherwise specified, the dimensions, materials, and manufacturing processes of the various components in the color fastness testing device for fiber textile fabrics in the present invention can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0040] Furthermore, to provide the public with a better understanding of the present invention, certain specific details are described in detail in the following description of the invention. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0041] Example 1 Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 9 and Figure 10 This embodiment discloses a color fastness testing device for fiber textile fabrics, including two positioning clamps 1, one of which is movably set and the other is fixedly set, and the two positioning clamps 1 together hold the elastic fabric.

[0042] It is understandable that by moving the two positioning clips 1 relative to each other, the movable positioning clips 1 stretch the elastic fabric. The purpose of pulling the fabric is not to "drive friction", but to "preset a 'stretch deformation state in actual use' for the fabric", so that the friction head can rub under this "real state".

[0043] This example uses the real-world scenario of "rubbing a watch against a T-shirt" to clearly explain why it is necessary to "preset a 'stress deformation state in actual use' for the fabric": When wearing an elastic T-shirt daily, the cuffs are stretched (deformed) due to the support of the arm, and only then does the color fade due to friction with the watch strap—without stretching and deformation, there is no actual color fading scenario. Pulling the elastic fabric during testing essentially does one thing: it stretches the fabric from a relaxed state to the stretched state it would be worn on (e.g., stretched by 20%), and then holds it in place—ensuring the friction head rubs against stretched, taut fabric, not flat, loose fabric. If it's not stretched, the friction head rubs against loose fabric: the fibers are loose, and there's very little color fading during friction, making the measured colorfastness completely unrelated to the actual situation when worn.

[0044] The difficulty in reproducing initial deformation during color fastness-to-rubbing tests of elastic fabrics is caused by the following factors: Traditional devices lack "precise deformation parameter control" and "initial state positioning": 1. The clamping position / clamping force varies each time, resulting in uneven stress on the fabric; 2. Deformation (stretching / compression) and deformation holding time are not quantitatively controlled and rely on manual operation.

[0045] Specifically, the positioning clamp 1 includes a U-shaped frame 11, a clamping plate 12 is slidably connected inside the frame 11, the clamping plate 12 and the frame 11 together fix the elastic fabric, a plurality of connecting rods 13 are inserted inside the frame 11, the bottom of the plurality of connecting rods 13 are fixedly connected to the clamping plate 12, the top of the plurality of connecting rods 13 are fixedly connected to a handle 14, a pre-tension spring 15 is fixedly connected inside the frame 11, and the other end of the pre-tension spring 15 is fixedly connected to the clamping plate 12.

[0046] When it is necessary to clamp the elastic fabric, force is applied to the handle 14 to pull the clamping plate 12 to move through the connecting rod 13, causing the pre-tension spring 15 to deform. At this time, the space available for clamping between the clamping plate 12 and the plate frame 11 becomes larger. The two sides of the elastic fabric are inserted into the plate frame 11 of the two positioning clamps 1 at the corresponding positions. Then, the force applied to the handle 14 is released, and the elastic force of the pre-tension spring 15 drives the clamping plate 12 to press the elastic fabric tightly to complete the fixation.

[0047] Furthermore, two guide components are provided between the two positioning clamps 1. The guide components include guide tubes 16, and guide posts 17 are slidably connected inside the guide tubes 16. Both guide tubes 16 are fixedly connected to the positioning clamps 1 at corresponding positions, and the two guide posts 17 are fixedly connected to the positioning clamps 1 on the side away from the guide tubes 16.

[0048] Furthermore, a tensioning and spacing assembly is provided on one side of the positioning clamp 1. The tensioning and spacing assembly includes a floor 18. Two spacing posts 19 are fixedly connected to one side of the floor 18. Each spacing post 19 has three guide slots 110. A spacing frame 111 is slidably arranged on the three guide slots 110. A limiting plate 112 is provided between the two spacing frames 111.

[0049] Furthermore, a positioning rod 113 is inserted into the spacer 111. A handle 114 is fixedly connected to one end of the positioning rod 113 located outside the spacer 111. A positioning plate 115 is fixedly connected to one end of the positioning rod 113 located inside one of the guide grooves 110. The positioning plate 115 is in close contact with the inner wall of the guide groove 110. A positioning spring 116 is fixedly connected to one side of the positioning plate 115. One side of the positioning spring 116 is fixedly connected to the spacer 111.

[0050] Please see Figure 1 , Figure 2 , Figure 3 and Figure 9 This embodiment discloses a color fastness testing device for fiber textile fabrics, including a friction drive component 2. The friction drive component 2 is used to rub elastic fabrics to perform rubbing color fastness testing.

[0051] Specifically, the friction drive assembly 2 includes two uprights 21, which are symmetrically fixed on the top of the floor 18. Two guide rails 22 are fixedly connected between the two uprights 21, and a traveling frame 23 is provided between the two guide rails 22. Traveling wheels 24 are rotatably connected to both sides of the top of the traveling frame 23. The traveling wheels 24 are slidably connected to the guide rails 22, and each of the two traveling wheels 24 has a groove. The two traveling wheels 24 are slidably connected to the guide rails 22 through the groove. The guide rails 22 are functionally divided into a friction area, a lifting area, and an idle area. The idle area is positioned higher than the floor 18. The height is higher than that of the friction area. There are smooth transition arc-shaped guide surfaces between the friction area and the raised area, and between the raised area and the idle area. The arc-shaped guide surfaces are adapted to the outer peripheral wall of the traveling wheel 24 to avoid the traveling wheel 24 getting stuck due to the step transition when switching areas. The traveling wheel 24 can slide from the friction area to the idle area through the raised area. The traveling wheel 24 can gradually increase its position height through the raised area until it enters the idle area. The top surface of the friction area has a slope, and the position height of the friction area near the raised area is higher than that of the side away from the raised area.

[0052] Furthermore, a rope-winding roller 25 is rotatably connected within the upright frame 21 located in the idle area. A traction rope 26 is wound and connected within the rope-winding roller 25. One end of the traction rope 26 is fixedly connected to the traveling frame 23. A friction roller 27 for rubbing against the elastic fabric is rotatably connected to the bottom of the traveling frame 23. The outer peripheral wall of the friction roller 27 is detachably wrapped with a standard friction medium (such as pure cotton friction cloth). The friction medium is fixed to the outer peripheral wall of the friction roller 27 by a ring elastic buckle, which facilitates periodic replacement to ensure the consistency of friction between different test batches and meets the requirements of color fastness testing for the friction medium. A servo motor 28 is fixedly connected to one side of the upright frame 21. The servo motor 28 is equipped with a programmable controller. The controller is electrically connected to a mechanical contact switch added to the trigger plate 117 of the timed rebound component. The rotation angle of the motor is pre-adjusted to match the winding length of the traction rope 26 and the length of each area of ​​the guide rail 22. In the initial state, the servo motor 28 receives the controller's command and cycles through 'forward rotation X angle → delay → reverse rotation X angle', driving the rope roller 25 to alternately wind and unwind the rope, causing the walking frame 23 to reciprocate within the friction area of ​​the guide rail 22, and the friction roller 27 to repeatedly rub the elastic fabric. When the friction detection reaches the set time / number, and the trigger plate 117 is squeezed and the contact switch is closed, the controller receives the 'end reciprocating' signal and immediately controls the motor to switch to continuous forward rotation Y angle. The rope roller 25 continuously winds up the traction rope 26 until the walking wheel 24 slides to the idle area of ​​the guide rail 22, the motor automatically stops, and the friction roller 27 disengages from the elastic fabric. The mechanical contact switch is a normally closed micro switch, which is fixed on the side wall of the guide rail 22 near the rotating shaft of the trigger plate 117. The spring end of the switch faces the side of the trigger plate 117 away from the traveling wheel 24. When the traveling wheel 24 presses the upturned end of the trigger plate 117, causing the trigger plate 117 to rotate around the rotating shaft to the 'horizontal state', the side of the trigger plate 117 away from the traveling wheel 24 will press the spring of the micro switch, causing the switch to switch from the normally closed state to the normally open state, and send an electrical signal of 'friction detection ended' to the programmable controller. After receiving the signal, the controller controls the servo motor 28 to switch to continuous forward rotation mode, and pulls the traveling frame 23 to move to the idle area.

[0053] Understandably, in the initial state, the elastic fabric is held and fixed by two positioning clamps 1, while the traveling wheel 24 is located on the side of the guide rail 22 with a lower position. When performing a rubbing color fastness test, the servo motor 28 is activated to rotate the rope winding roller 25, causing it to wind up the traction rope 26, which in turn moves the traveling frame 23 on the guide rail 22 via the traveling wheel 24. When the traveling wheel 24 moves from one side of the friction area of ​​the guide rail 22 to the other side near the raised area, the servo motor 28 drives the rope winding roller 25 to release the traction rope 26. The traveling frame 23 then slides back to its original position under its own weight via the traveling wheel 24, and the friction area of ​​the guide rail 22... Both sides of the inner wall of the area are provided with guide protrusions extending along their length. The inner wall of the groove of the walking wheel 24 is provided with a guide groove that matches the guide protrusions. The guide protrusions and the guide grooves slide together to ensure that the walking frame 23 always moves along the axis of the guide rail 22 during self-realignment and does not deviate laterally. This causes the friction roller 27 to move back and forth and rub against the elastic fabric. After the friction detection is completed, the servo motor 28 will drive the rope winding roller 25 to continuously wind up the traction rope 26, so that the traction rope 26 pulls the walking frame 23 to move until the walking wheel 24 slides to the idle area, so that the friction roller 27 is separated from the contact with the elastic fabric.

[0054] A timing rebound assembly is provided on one side of the friction drive assembly 2. The timing rebound assembly includes a trigger plate 117, which is rotatably connected to one side of one of the guide rails 22. A first return spring is fixedly connected to one side of the trigger plate 117 and to the corresponding guide rail 22. In the initial state, one end of the trigger plate 117 is higher than the height of the guide rail 22 in the raised area. When the traveling wheel 24 passes through the raised area, it contacts and presses the end of the trigger plate 117 above the raised area, causing it to rotate, thereby raising the height of the other end of the trigger plate 117. A driven rope 118 is attached to the other end of the trigger plate 117. Two mounting seats 119 are fixedly connected to the mounting plate 112. A rotating rod 120 is rotatably connected to the two mounting seats 119. A protruding plate 121 is fixedly connected to one end of the rotating rod 120. In the initial state, the protruding end of the protruding plate 121 is set vertically downward. The other end of the driven rope 118 is fixedly connected to the protruding end of the protruding plate 121. A hook 122 is fixedly connected to the rotating rod 120. The frame 11 of the movable positioning clamp 1 has a hanging opening 123 adapted to the hook 122. A second return spring 124 is fixedly connected to one side of one of the mounting seats 119. The other end of the second return spring 124 is fixedly connected to the hook 122.

[0055] The top plate 125 is fixedly connected to the side of the two guide columns 17 away from the elastic fabric, and the electric telescopic rod 126 is fixedly connected to the side of the two guide tubes 16 opposite to each other. The top plate 125 is set in the telescopic path of the telescopic end of the electric telescopic rod 126.

[0056] In the initial state, the extension of the telescopic end of the electric telescopic rod 126 pushes against the top plate 125 to move, causing the guide post 17 to drive the positioning clip 1 connected to it to move, so that the elastic fabric is stretched until the positioning clip 1 abuts against the limiting plate 112. During this process, the plate frame 11 and the hook 122 are pressed against each other, causing the hook 122 to rotate and the second return spring 124 to deform. When the hanging port 123 moves to the position corresponding to the hook 122, the elastic force of the second return spring 124 drives the hook 122 to reset and lock into the hanging port 123. When one end of the trigger plate 117 is pressed down by the traveling wheel 24, the other end of the trigger plate 117 will be raised, so that the driven rope 118 pulls the convex plate 121 to rotate, so that the rotating rod 120 rotates and drives the hook 122 to rotate and disengage from the hanging port 123. At this time, the elastic fabric will rebound using its own elasticity.

[0057] It should be noted that the trigger plate 117 initially has a chamfer at the end that is higher than the guide rail 22. When the traveling wheel 24 moves from the idle area to the raised area, it can smoothly pass through the raised area and enter the friction area by squeezing the chamfer.

[0058] Please see Figure 3 , Figure 4 and Figure 5 This embodiment discloses a color fastness testing device for fiber textile fabrics, including a rebound deceleration component 3 and a color fading receiving component. The rebound deceleration component 3 is used to reduce the rebound speed of the elastic fabric by damping when the elastic fabric rebounds to its original state, thereby reducing friction between fabric fibers and preventing color transfer from the fabric fibers. The color fading receiving component is used to collect any color fading that may occur during the fabric's rebound. During rebound, the color fading is directly rubbed onto the color fading receiving component, thereby incorporating the color fading factor into the factors of the rubbing color fastness test and improving the accuracy of the rubbing color fastness test for elastic fabrics.

[0059] Specifically, the rebound deceleration assembly 3 includes two felt strips 31 fixedly disposed on opposite sides of the two spacer posts 19. The positioning clamp 1 also includes two deceleration frames 32 integrally formed with both sides of the frame 11. Each deceleration frame 32 has a deceleration groove, and a brake block 33 is rotatably connected in the deceleration groove. A stop strip 34 is fixedly connected in the deceleration groove. When the elastic fabric is stretched, when one side of the brake block 33 contacts the felt strip 31, the force generated by the relative compression will be bounced away, making it difficult for the brake block 33 to hinder the stretching of the elastic fabric. When the elastic fabric rebounds and recovers, when the other side of the brake block 33 contacts the felt strip 31, it will be blocked and restricted from rotating by the stop strip 34, so that the brake block 33 continues to move by rubbing against the felt strip 31. The felt strip 31 provides damping for the movement of the brake block 33, thereby slowing down the rebound speed of the elastic fabric and reducing the friction between the fabric fibers.

[0060] The color fading receiving component includes two test cloths 35, both of which are installed in one of the positioning clips 1, and the two test cloths 35 are positioned between the clip plate 12 and the elastic fabric.

[0061] It is understandable that when clamping and positioning the elastic fabric, the test cloth 35 can be attached to the elastic fabric and clamped and fixed together with the elastic fabric in one of the positioning clips 1. Preferably, it is clamped and fixed in the immovable positioning clip 1. When the fabric rebounds, the color will directly rub onto the test cloth 35 without manual alignment. The technical basis of this preferred solution is that the immovable positioning clip 1 remains relatively fixed to the floor 18, and its position will not change with the stretching or rebound of the fabric. This ensures that the test cloth 35 remains in contact with the fixed end of the fabric throughout the entire testing process, avoiding relative sliding between the test cloth 35 and the fabric due to the movement of the movable positioning clip 1, thereby preventing incomplete capture of rebound color fading data. If the test cloth 35 is fixed in the movable positioning clip 1, the movement of the movable positioning clip 1 when the fabric rebounds will cause the test cloth 35 to detach from the fabric rebound area, which cannot effectively absorb the rebound color fading.

[0062] This device, through the coordinated action of a positioning component, a tension and spacing assembly, a friction drive assembly 2, a rebound deceleration assembly 3, and a colorfastness receiving assembly, completes the testing of the color fastness of elastic fabrics. The specific workflow is as follows: First, the elastic fabric is clamped: External force is applied to the handle 14 of the positioning clamp 1, causing multiple connecting rods 13 to move synchronously. This pulls the clamping plate 12 to slide along the inner wall of the U-shaped frame 11. During this process, the pre-tension spring 15 inside the frame 11 is compressed, creating a gap between the clamping plate 12 and the frame 11 to accommodate the fabric. The two ends of the elastic fabric are placed into the gaps between the "fixed positioning clamp 1" and the "movable positioning clamp 1," respectively. Then, the external force on the handle 14 is released, and the pre-tension spring 15 releases its elastic potential energy, causing the clamping plate 12 to reset. This allows the clamping plate 12 and the frame 11 to jointly press the fabric, achieving bidirectional fixation of the elastic fabric. Simultaneously, the test cloth 35 of the color-fading receiving component is attached to one side of the fabric and held together by the clamping plate 12 and the frame 11 of the fixed positioning clamp 1, ensuring no relative displacement between the test cloth 35 and the fabric surface.

[0063] After the fabric is clamped, the electric telescopic rod 126 on the fixed positioning clamp 1 side is activated. The telescopic end of the electric telescopic rod 126 pushes the top plate 125 at the end of the guide column 17 on the movable positioning clamp 1 side in a straight line. The guide column 17 slides axially under the constraint of the guide tube 16, causing the movable positioning clamp 1 to move away from the fixed positioning clamp 1. The elastic fabric is gradually stretched as the movable positioning clamp 1 moves. Adjust the position of the stretching and positioning assembly according to the testing requirements: pull the positioning rod 113 by the handle 114. The positioning rod 113 drives the positioning plate 115 to compress the positioning spring 116, so that the positioning plate 115 is disengaged from the inner wall of the guide groove 110 of the positioning column 19. After pushing the positioning frame 111 to the target guide groove 110 position, release the handle 114. The positioning spring 116 rebounds and drives the positioning plate 115 to reset, so that the positioning plate 115 is tightly attached to the inner wall of the guide groove 110, completing the position locking of the positioning frame 111 and the limiting plate 112. When the movable positioning clamp 1 moves to abut against the limiting plate 112, the electric telescopic rod 126 stops moving, and the fabric stretching deformation is locked. At this time, the hanging port 123 of the movable positioning clamp 1 frame 11 is aligned with the hook 122 of the timed rebound component, and the second return spring 124 drives the hook 122 to engage with the hanging port 123, thereby fixing the position of the movable positioning clamp 1.

[0064] The servo motor 28 of the friction drive assembly 2 is activated. The servo motor 28 outputs torque to drive the rope roller 25 on the upright frame 21 to rotate. During the rotation of the rope roller 25, the traction rope 26 is wound up. The traction rope 26 applies tension to the walking frame 23, causing the walking frame 23 to slide along the friction area of ​​the guide rail 22 via the top walking wheel 24. The slope structure of the friction area of ​​the guide rail 22 ensures that the standard friction medium, such as pure cotton friction cloth, on the outer peripheral wall of the friction roller 27 at the bottom of the walking frame 23 maintains uniform contact pressure with the stretched fabric when it moves, realizing friction detection on the fabric surface. When the rope roller 25 is wound up to the point where the walking wheel 24 is close to the raised area of ​​the guide rail 22, the servo motor 28 rotates in the opposite direction, the rope roller 25 releases the traction rope 26, and the walking frame 23 returns to its original position along the friction area via the walking wheel 24 under its own weight, completing the reciprocating friction action of the friction roller 27. When the number of reciprocating frictions or the duration of friction of the friction roller 27 reaches the preset requirement, the servo motor 28 switches to continuous forward rotation, the rope winding roller 25 continuously winds up the traction rope 26, and the walking wheel 24 smoothly transitions to the idle area along the arc-shaped guide surface of the raised area, and the friction roller 27 detaches from the fabric surface.

[0065] When the traveling wheel 24 moves along the raised area of ​​the guide rail 22, it presses against the trigger plate 117 of the timed rebound assembly. The trigger plate 117 rotates around the guide rail 22 and stretches the first return spring, while its other end rises and pulls the driven rope 118. The driven rope 118 pulls the protrusion 121 on the rotating rod 120, causing the rotating rod 120 to rotate around the mounting base 119, thereby causing the hook 122 to disengage from the hanging opening 123. The position restriction of the movable positioning clip 1 is released, and the elastic fabric begins to rebound under its own elasticity. When the traveling wheel 24 is completely in the idle area, it no longer presses against the trigger plate 117. The first return spring causes the trigger plate 117 to reset, the driven rope 118 loosens, the rotating rod 120 resets under the action of the second return spring 124, and the hook 122 returns to the initial ready-to-engage position.

[0066] During the fabric rebound process, the deceleration frames 32 on both sides of the positioning clamp 1 frame 11 move synchronously with the movable positioning clamp 1. The brake block 33 in the deceleration groove of the deceleration frame 32 contacts the felt strip 31 on the spacer post 19. Because the stop strip 34 restricts the brake block 33 from rotating in the rebound direction, the brake block 33 can only move close to the felt strip 31. The felt strip 31 generates a damping force on the brake block 33, slowing down the moving speed of the movable positioning clamp 1, thereby reducing the fabric rebound speed and reducing secondary color migration caused by inter-fiber friction. At the same time, the test cloth 35, which is in contact with the fabric, rebounds together with the fabric. During the rebound process, the color fading on the fabric surface is directly transferred to the test cloth 35. Finally, by observing the color fading of the friction medium and the test cloth 35, the comprehensive rating of the color fastness of the elastic fabric is completed.

[0067] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for testing the color fastness of fiber textile fabrics, characterized in that, include: The positioning component includes a fixed positioning clamp (1) and a movable positioning clamp (1), the two positioning clamps (1) being used to clamp the elastic fabric together; A stretching and positioning assembly, which cooperates with the movable positioning clamp (1) to control the initial stretching deformation of the elastic fabric, the stretching and positioning assembly includes a floor (18), at least two positioning posts (19) fixed to one side of the floor (18), and a positioning frame (111) and a limiting plate (112) slidably disposed on the positioning posts (19), the limiting plate (112) being used to abut against the movable positioning clamp (1) to limit the stretching position; A rebound deceleration component is disposed between the positioning member and the stretching and spacing component to reduce the rebound speed of the elastic fabric. Friction drive assembly (2), which is mounted above the floor (18) and is used to perform friction detection on the stretched elastic fabric. The friction drive assembly (2) includes a stand (21), a guide rail (22) fixed between the stand (21), a walking frame (23) slidably connected to the guide rail (22), and a friction roller (27) rotatably connected to the bottom of the walking frame (23).

2. The color fastness testing device for fiber textile fabrics according to claim 1, characterized in that: The positioning clamp (1) includes a U-shaped frame (11), a clamping plate (12) slidably connected to the frame (11), a plurality of connecting rods (13) inserted into the frame (11) and fixedly connected at the bottom to the clamping plate (12), and a handle (14) fixed to the top of the plurality of connecting rods (13); a pre-tensioning spring (15) is fixedly connected inside the frame (11), and the other end of the pre-tensioning spring (15) is fixedly connected to the clamping plate (12).

3. The color fastness testing device for fiber textile fabrics according to claim 1 or 2, characterized in that: At least two guide components are provided between the two positioning clamps (1), the guide components include a guide tube (16) and a guide post (17) slidably connected in the guide tube (16); the guide tube (16) is fixedly connected to one of the positioning clamps (1), and the guide post (17) is fixedly connected to the other positioning clamp (1).

4. The color fastness testing device for fiber textile fabrics according to claim 1, characterized in that: At least two guide slots (110) are provided on the distance column (19) along its length direction. The distance frame (111) is slidably disposed on the guide slots (110). A positioning rod (113) is inserted into the distance frame (111). One end of the positioning rod (113) extends to the outside of the distance frame (111) and is fixedly connected to a handle (114). The other end extends into the guide slot (110) and is fixedly connected to a positioning plate (115). The positioning plate (115) is in close contact with the inner wall of the guide slot (110). A positioning spring (116) is fixedly connected to one side of the positioning plate (115). The other end of the positioning spring (116) is fixedly connected to the distance frame (111).

5. The color fastness testing device for fiber textile fabrics according to claim 1, characterized in that: The guide rail (22) is divided into a friction area, a raised area and an idle area along its length. The idle area is higher than the friction area. The friction area and the raised area, as well as the raised area and the idle area, are provided with a smooth transition arc-shaped guide surface. A servo motor (28) and a rope winding roller (25) are fixedly connected to the upright frame (21). The rope winding roller (25) is connected to the servo motor (28) for transmission. A traction rope (26) is wound on the rope winding roller (25). The other end of the traction rope (26) is fixedly connected to the walking frame (23). The walking frame (23) has rotatably connected to two sides of its top, and the walking wheels (24) are slidably engaged with the guide rail (22).

6. A color fastness testing device for fiber textile fabrics according to claim 1 or 5, characterized in that: It also includes a timed rebound assembly, which includes a trigger plate (117), a driven rope (118), a mounting base (119), a rotating rod (120), and a hook (122). The trigger plate (117) is rotatably connected to one side of one of the guide rails (22), and a first return spring is fixedly connected to one side of the trigger plate (117). The other end of the first return spring is fixedly connected to the guide rail (22). The mounting base (119) is fixed on the limiting plate (112). The rotating rod (120) is rotatably connected between the two mounting bases (119). The hook (122) is fixed on the rotating rod (120). The frame (11) of the movable positioning clamp (1) has a hanging port (123) adapted to the hook (122). One end of the driven rope (118) is connected to the trigger plate (117), and the other end is connected to the protrusion (121) on the rotating rod (120).

7. The color fastness testing device for fiber textile fabrics according to claim 1, characterized in that: The rebound deceleration assembly includes a felt strip (31) fixed to one side of the two spacers (19) and a deceleration frame (32) integrally formed with the two sides of the plate frame (11) of the positioning clamp (1); the deceleration frame (32) is provided with a deceleration groove, a brake block (33) is rotatably connected in the deceleration groove, and a stop bar (34) is fixedly connected in the deceleration groove.

8. A device for testing the color fastness of fiber textile fabrics according to claim 1 or 2, characterized in that: It also includes a color-fading receiving component, which includes at least two test cloths (35). The test cloths (35) are disposed between the clamping plate (12) of the positioning clamp (1) and the elastic fabric, and are clamped and fixed together with the elastic fabric by the clamping plate (12) and the frame (11).

9. The color fastness testing device for fiber textile fabrics according to claim 5, characterized in that: The outer peripheral wall of the friction roller (27) is detachably wrapped with a standard friction medium.

10. The color fastness testing device for fiber textile fabrics according to claim 1, characterized in that: The guide post (17) connected to the movable positioning clamp (1) is fixedly connected to a top plate (125) on the side away from the elastic fabric, and the guide tube (16) connected to the fixed positioning clamp (1) is fixedly connected to an electric telescopic rod (126) on the opposite side; the top plate (125) is located on the telescopic path of the telescopic end of the electric telescopic rod (126).

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