Single Fiber Heat Shrinkage Rate Tester

Abstract

This invention relates to the field of fiber quality testing technology, specifically a single fiber heat shrinkage rate tester, comprising: a constant temperature oven, a loading device, a robotic arm, and an optical testing device; the loading device includes a turntable and a tray, a rotary transmission component rotatably mounted on the turntable, a rotating cage mounted on the tray, and multiple sets of yarn-clamping springs and stop components adapted to the yarn-clamping springs arranged circumferentially on the rotating cage; it also includes: a bottom support component connected to the rotating cage, multiple sets of lifting frames slidably mounted on the bottom support component, and a guide groove provided on the lifting frame; a triggering component, which cooperates with a pressure roller disposed in the guide groove, enabling the pressure roller to tend to remain at the end of the guide groove when the lifting frame moves to the end of its stroke; and an elastic support component, connected to the bottom support component and connected to the lifting frame, the elastic support component being provided with an axial groove, the axial groove cooperating with a convex shaft connecting the lifting frame, enabling it to move when the lifting frame is oriented to a predetermined position, thereby exposing the yarn and improving testing accuracy.

Description

Technical Field

[0001] This invention relates to the field of fiber quality testing technology, specifically a single fiber heat shrinkage rate tester. Background Technology

[0002] For fibers, heat shrinkage rate is an important quality indicator. When testing the heat shrinkage rate of fibers, the fiber is usually fixed in the following way: one end of the fiber is fixed to the yarn clamping spring, and the other end is clamped by the tension sample clamp to keep the fiber straight. In batch testing, multiple sets of the yarn clamping springs are arranged in a circle. Multiple sets of yarn clamping springs can drive the fiber to rotate. In this process, in order to prevent the sample clamp from moving inconsistently with the yarn clamping spring due to inertia, a stop is usually set on the rear side of the sample clamp on the device so that the sample clamp can follow the movement when the yarn clamping spring rotates, thereby improving the synchronization of the two movements.

[0003] However, the continuous movement of the fiber driven by the clamping spring has the following problems. First, the fiber is always in motion, which results in a short detection time for the detection device. The detection device does not have enough time to perform a second detection to correct the detection data. Second, during the rotation, the sample clamp will cause the fiber to swing outward under the action of centrifugal force, which leads to a decrease in detection accuracy.

[0004] Compared to continuous fiber movement, stepping fiber movement can significantly increase the detection time of the detection device and thus improve detection accuracy. However, the aforementioned centrifugal swing problem still exists. Furthermore, during the stepping motion, the sample clamp will continue to move due to inertia even when the clamping spring stops. These problems limit the application of stepping motion for high-precision fiber detection. Summary of the Invention

[0005] The purpose of this invention is to provide a single-fiber heat shrinkage rate tester to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] Single fiber heat shrinkage rate tester, including:

[0008] Automatic constant temperature drying oven, loading device, robotic arm and optical inspection device;

[0009] The loading device includes a turntable and a tray arranged in parallel. Multiple sets of rotary transmission components are rotatably mounted on the turntable. A rotating cage adapted to the rotary transmission components is provided on the tray. Multiple sets of yarn clamping springs and stop components adapted to the yarn clamping springs are arranged circumferentially on the rotating cage.

[0010] Also includes:

[0011] A bottom support is connected to the rotating cage, and multiple sets of lifting frames are slidably installed on the bottom support. The lifting frames are provided with guide grooves.

[0012] A triggering component is disposed between the bottom support and the stop. The triggering component cooperates with the pressure roller disposed in the guide groove, and can cause the pressure roller to tend to stay at the end of the guide groove when the lifting frame moves to the end of the stroke.

[0013] An elastic support assembly is connected to the bottom support and the lifting frame. The elastic support assembly is provided with an axial groove, which engages with a convex shaft connected to the lifting frame. It can move when the lifting frame is oriented to a predetermined position to expose the yarn.

[0014] As a further embodiment of the present invention: the bottom support is coaxially and fixedly connected to the rotating cage, and a protruding ring is provided at the bottom of the bottom support, the protruding ring being adapted to the limiting hole provided on the tray;

[0015] The directional groove includes a first inclined groove and a second inclined groove disposed on the lifting frame, and the connection between the first inclined groove and the second inclined groove forms an upwardly extending protrusion.

[0016] Limiting rollers are provided on both sides of the pressure roller, and the limiting rollers can roll within the first inclined groove and the second inclined groove.

[0017] As a further embodiment of the present invention: the triggering component includes a first triggering element disposed on the bottom support and a second triggering element fixedly connected to the stop element, wherein the first triggering element and the second triggering element are respectively provided with inclined surfaces that guide the pressure roller to move along the first inclined groove and the second inclined groove;

[0018] The inclined surface provided on the second trigger can form an acute angle with the direction of the second inclined groove toward the protrusion.

[0019] As a further embodiment of the present invention: the elastic support component includes:

[0020] The elastic structure is provided on the bottom support and the lifting frame;

[0021] An annular guide is slidably connected to a guide rod disposed on the tray. An axial groove is disposed within the annular guide. When the convex shaft moves to a predetermined position, the elastic structure can drive the lifting frame to move toward the annular guide.

[0022] A lifting member is fixedly installed on the turntable, and when the tray moves toward the turntable, the lifting member can lift the annular guide upward.

[0023] As a further embodiment of the present invention: the elastic structure includes a telescopic rod connecting the bottom support and the lifting frame, and a cylindrical spring is sleeved on the telescopic rod. One end of the cylindrical spring is connected to the lifting frame, and the other end is connected to the bottom support.

[0024] As a further embodiment of the present invention: the axial groove includes a fan-shaped groove disposed on the annular guide and a V-shaped groove connected to the fan-shaped groove, one side of the V-shaped groove being parallel to the axial direction of the annular guide and the other side being inclined.

[0025] As a further embodiment of the present invention: the lifting member is a limiting member fixedly installed on the turntable, the limiting member is coaxial with the rotary transmission member, and when the tray moves toward the turntable, the limiting member enables the annular guide member to move upward relative to the tray.

[0026] As a further aspect of the present invention, it also includes:

[0027] An insertion groove is provided on the rotary transmission component, and an insertion rod is connected to the rotating cage. The end of the insertion rod is provided with a tapered portion, and a fitting shaft is provided on the insertion rod. The fitting shaft is adapted to a limiting groove provided in the insertion groove.

[0028] As a further aspect of the present invention: the limiting groove includes multiple sets of fitting grooves arranged circumferentially at equal intervals on the inner wall of the insertion groove, and two sets of guide surfaces are symmetrically arranged at the upper end of the fitting groove, the guide surfaces being able to guide the fitting shaft into the fitting groove.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] By using a lifting frame and pressure rollers, firstly, the lifting frame can limit the sample clamps during the rotation of the rotating drum and the fiber and sample clamps, preventing them from being thrown outwards from the rotating drum under centrifugal force. This ensures the radial stability of the fiber and sample clamps relative to the rotating drum during rotation. Secondly, the pressure rollers, under the action of gravity, can cooperate with the stop to limit the suspended fiber. Furthermore, as the fiber moves to the predetermined position and the lifting frame moves downwards, the pressure rollers will follow the lifting frame downwards to cooperate with the stop to constrain the fiber from top to bottom, creating a downward "straightening" action on the fiber. This prevents the fiber and sample clamps from continuing to move along the tangential direction of the rotating drum due to inertia when the drum stops rotating, which would cause a decrease in detection accuracy. This achieves multi-directional limiting of the sample clamps and fiber, ensuring detection accuracy.

[0031] The elastic support components allow the stop to be fully exposed during fiber clamping, facilitating the placement of the sample clamp on one side of the stop. Furthermore, when the rotating cage is stacked on the rotating transmission component, multiple lifting frames and corresponding pressure rollers can limit the movement of the corresponding fibers. Additionally, when the lifting frame rotates to a predetermined position, it can move downwards, facilitating fiber detection by the optical inspection device. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of one embodiment of a single-fiber heat shrinkage rate tester.

[0033] Figure 2 This is a schematic diagram of the loading device in one embodiment of a single-fiber heat shrinkage rate tester.

[0034] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0035] Figure 4 This is a schematic diagram of the loading device from another angle in one embodiment of the single fiber heat shrinkage rate tester.

[0036] Figure 5 for Figure 4 Enlarged view of the structure at point B.

[0037] Figure 6 This is a schematic diagram of the existing technology.

[0038] Figure 7 This is a schematic diagram of the structure of a single-fiber heat shrinkage rate tester in one embodiment, showing the separation and connection of the rotating cage and the rotating transmission component.

[0039] Figure 8 This is a schematic diagram of the trigger component and elastic support component in one embodiment of a single-fiber heat shrinkage rate tester.

[0040] Figure 9 for Figure 8 Enlarged view of the structure at point C.

[0041] Figure 10 This is a schematic diagram of the cooperation relationship between the pressure roller and the triggering component in various states in one embodiment of a single fiber heat shrinkage rate tester.

[0042] Figure 11 This is a schematic diagram of the elastic structure in one embodiment of a single-fiber heat shrinkage rate tester.

[0043] Figure 12 This is a schematic diagram of the structure of the annular guide in one embodiment of a single-fiber heat shrinkage rate tester.

[0044] In the diagram: 1. Automatic constant temperature drying oven; 101. Support drawer; 2. Robotic arm; 3. Optical inspection device; 4. Turntable; 5. Rotary transmission component; 501. Insertion groove; 502. Guide surface; 503. Fitting groove; 6. Tray; 7. Rotary cage; 8. Yarn clamping spring; 9. Insertion rod; 901. Conical part; 902. Fitting shaft; 10. Bottom support; 1001. Convex ring; 11. Stop; 12. Fiber to be tested; 13. Sample holder; 14. Lifting frame; 1401. First inclined groove; 1402. Second inclined groove; 15. Pressure roller; 16. First trigger; 17. Second trigger; 18. Telescopic rod; 19. Cylindrical spring; 20. Convex shaft; 21. Annular guide; 2101. Fan-shaped groove; 2102. V-shaped groove; 22. Guide rod; 23. Restricting component. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0047] Please see Figures 1-12 In this embodiment of the invention, the single-fiber heat shrinkage rate tester includes:

[0048] The system comprises an automatic constant temperature drying oven 1, a loading device, a robotic arm 2, and an optical inspection device 3. The automatic constant temperature drying oven 1 is equipped with a pull-out support drawer 101, and the optical inspection device 3 has a CCD industrial camera positioned on the side facing the loading device. In use, the single fiber to be inspected is first clamped onto the loading device. The CCD industrial camera measures the length of each single fiber to obtain an initial length. Then, the robotic arm 2 transfers the single fiber to be inspected after the initial length measurement to the support drawer 101. Subsequently, the support drawer 101 carries the single fiber to be inspected into the automatic constant temperature drying oven 1 for heating. After a predetermined heating time, the robotic arm 2 transfers the single fiber to be inspected back to the loading device. The optical inspection device 3 then measures the length of the single fiber after heating to obtain its thermally shrunk length. Finally, by comparing these two lengths, the thermal shrinkage rate of the single fiber is obtained.

[0049] The movement of the aforementioned support drawer 101 is controlled by high-precision slides located on both sides of the automatic constant temperature drying oven 1. By using a high-precision stepper motor to control the movement of the support drawer 101, the opening and closing position of the support drawer 101 can be accurately controlled. This allows the robotic arm 2 to transfer the tray 6 and the rotating cage 7 into the support drawer 101 with higher positional accuracy, enabling the robotic arm 2 to accurately grasp the tray 6 after the automatic constant temperature drying oven 1 has completed heating the single fiber.

[0050] Based on the above settings, the single fiber is transferred by a mechanical structure throughout the entire testing process without human intervention, which improves the accuracy of the single fiber in the transfer and testing process. At the same time, the single fiber can be removed more accurately in time after being heated for a predetermined time, avoiding the single fiber being overheated or underheated, which would lead to inaccurate test results due to heating time issues.

[0051] The loading device includes a turntable 4 and a tray 6 arranged in parallel. Multiple sets of rotary transmission components 5 are rotatably mounted on the turntable 4. A rotating cage 7 adapted to the rotary transmission components 5 is provided on the tray 6. Multiple sets of yarn clamping springs 8 and stop components 11 adapted to the yarn clamping springs 8 are arranged circumferentially on the rotating cage 7. It should be noted that when one end of the single fiber to be tested is clamped on the yarn clamping spring 8, the other end is clamped by the sample clamp 13. Under the action of the gravity of the sample clamp 13, the fiber can be kept taut, thereby improving the measurement accuracy.

[0052] It should also be noted that a first drive device is provided at the bottom of the turntable 4, which can drive the turntable 4 to rotate. Furthermore, multiple sets of second drive devices are provided at the bottom of the turntable 4. The output shaft of the second drive device is connected to the rotary transmission component 5, which enables the rotary transmission component 5 to rotate relative to the turntable 4.

[0053] Furthermore, multiple sets of yarn clamping springs 8 are provided on the rotating drum 7. When the first drive device is working, it can drive the turntable 4 to rotate so that multiple sets of rotating drums 7 can stop sequentially on the side of the optical detection device 3. Then the second drive device works to drive the rotating drum 7 to rotate. At this time, the optical detection device 3 can sequentially detect multiple sets of single fibers suspended on the rotating drum 7.

[0054] It also includes: bottom support 10, trigger component, and elastic support component.

[0055] Please see Figures 8-11 The bottom support 10 is connected to the rotating cage 7. Specifically, the bottom support 10 is coaxially and fixedly connected to the rotating cage 7, and the bottom of the bottom support 10 is provided with a protruding ring 1001. The protruding ring 1001 is adapted to the limiting hole provided on the tray 6. During the placement of the rotating cage 7, by making the protruding ring 1001 engage with the limiting hole, the position of the rotating cage 7 relative to the tray 6 can be guaranteed, so that when the tray 6 moves toward the turntable 4, the rotating cage 7 can be precisely engaged with the rotary transmission component 5.

[0056] Multiple sets of lifting frames 14 are slidably mounted on the bottom support 10. The lifting frame 14 is provided with a guide groove. The guide groove includes a first inclined groove 1401 and a second inclined groove 1402 provided on the lifting frame 14. The connection between the first inclined groove 1401 and the second inclined groove 1402 forms an upwardly extending protrusion.

[0057] Limiting rollers are provided on both sides of the pressure roller 15, and the limiting rollers can roll within the first inclined groove 1401 and the second inclined groove 1402.

[0058] In this embodiment, when the robot arm 2 releases the tray 6, the rotating cages 7 can be stacked on the rotating transmission component 5. At this time, one set of rotating cages 7 is located on the side of the optical detection device 3, and the lifting frame 14 is in an upward lifting state. At the same time, the pressure roller 15 is at the end of the first inclined groove 1401 away from the second inclined groove 1402. In this state, the lifting frame 14 can block the end of the stop 11 away from the rotating cage 7, so that when the rotating cage 7 drives the fiber and the sample holder 13 to rotate, the lifting frame 14 can limit the sample holder 13 and prevent the sample holder 13 from being thrown outwards towards the rotating cage 7 under the action of centrifugal force. That is, the radial stability of the fiber and the sample holder 13 relative to the rotating cage 7 is guaranteed during the rotation of the rotating cage 7.

[0059] It should be noted that when the fiber is clamped on the yarn clamping spring 8, the sample clamp 13 should be flush with the outer side of the stop 11 when the fiber is vertical, so as to avoid the gap between the sample clamp 13 and the lifting frame 14, which would cause the sample clamp 13 to still move in the radial direction of the rotating cage 7 during the rotation of the rotating cage 7, resulting in a decrease in accuracy during the testing process.

[0060] Furthermore, when the pressure roller 15 is at the end of the first inclined groove 1401 away from the second inclined groove 1402, it tends to remain in that position under the action of gravity. In this state, the pressure roller 15 can limit the suspended fiber. After the fiber moves to the predetermined position and the lifting frame 14 moves downward, the pressure roller 15 will follow the lifting frame 14 to move downward, so as to cooperate with the stop 11 to constrain the fiber from top to bottom, producing a downward "straightening" action on the fiber. This prevents the fiber and sample clamp 13 from still moving along the tangential direction of the rotation of the rotating cage 7 due to inertia when the rotating cage 7 stops rotating, which would cause a decrease in detection accuracy.

[0061] Furthermore, when the lifting frame 14 descends to its maximum height, the pressure roller 15 can switch from the first inclined groove 1401 to the second inclined groove 1402. At this time, the pressure roller 15 can separate from the stop 11. During the subsequent upward movement of the lifting frame 14, the pressure roller 15 can maintain a predetermined gap with the fiber and the sample holder 13, so as to avoid the pressure roller 15 directly acting on the sample holder 13 and pushing it upward when it moves upward, which would cause the fiber to twist or even become entangled.

[0062] Specifically, the position switching reference for pressure roller 15 is as follows:

[0063] The triggering component is disposed between the bottom support 10 and the stop 11. The triggering component cooperates with the pressure roller 15 disposed in the guide groove, and can make the pressure roller 15 tend to stay at the end of the guide groove when the lifting frame 14 moves to the end of the stroke.

[0064] The triggering assembly includes a first trigger 16 disposed on the bottom support 10 and a second trigger 17 fixedly connected to the stop 11. The first trigger 16 and the second trigger 17 are respectively provided with inclined surfaces that guide the pressure roller 15 to move along the first inclined groove 1401 and the second inclined groove 1402.

[0065] The inclined surface provided on the second trigger 17 can form an acute angle with the direction of the second inclined groove 1402 toward the protrusion.

[0066] For ease of understanding, the initial state is taken as the lifting frame 14 being at its lowest height. At this time, the pressure roller 15 is at the end of the second inclined groove 1402 away from the first inclined groove 1401. When the lifting frame 14 moves upward, the pressure roller 15 can be held in this position under its own weight, thereby preventing the pressure roller 15 from interfering with the sample clamp 13 during the upward process and lifting it up. As the lifting frame 14 rises, the pressure roller 15 will abut against the inclined surface on the second trigger 17. Under the action of this inclined surface, the pressure roller 15 can move along the second inclined groove 1402 until the pressure roller 15 moves past the protrusion. Then, the pressure roller 15 can move along the first inclined groove 1401 under the action of gravity and then cooperate with the stop 11 to limit the fiber.

[0067] When the lifting frame 14 moves downward, the pressure roller 15 can always be in contact with the stop 11 and limit the fiber. When the lifting frame 14 is about to descend to the end of the stroke, the pressure roller 15 can cooperate with the inclined surface on the first trigger 16 and switch from the first inclined groove 1401 to the second inclined groove 1402 to realize the reset of the pressure roller 15.

[0068] Please see Figures 11-12 The elastic support assembly is connected to the bottom support 10 and the lifting frame 14. The elastic support assembly is provided with an axial groove, which engages with a convex shaft 20 connecting to the lifting frame 14. It can move when the lifting frame 14 is oriented to a predetermined position to expose the yarn. Specifically, the elastic support assembly includes:

[0069] An elastic structure is provided on the bottom support 10 and the lifting frame 14. The elastic structure includes a telescopic rod 18 connecting the bottom support 10 and the lifting frame 14. A cylindrical spring 19 is sleeved on the telescopic rod 18. One end of the cylindrical spring 19 is connected to the lifting frame 14, and the other end is connected to the bottom support 10. The telescopic rod 18 has a maximum extension, so that when the tray 6 is away from the turntable 4, the distance between the annular guide 21 and the lifting frame 14 is constant, so that the two can be regarded as a whole.

[0070] An annular guide 21 is slidably connected to a guide rod 22 disposed on the tray 6. An axial groove is disposed within the annular guide 21. When the convex shaft 20 moves to a predetermined position, the elastic structure can drive the lifting frame 14 to move toward the annular guide 21.

[0071] The axial groove includes a fan-shaped groove 2101 disposed on the annular guide 21 and a V-shaped groove 2102 connected to the fan-shaped groove 2101. One side of the V-shaped groove 2102 is parallel to the axial direction of the annular guide 21, and the other side is inclined.

[0072] In the embodiment, initially, the cylindrical spring 19 is compressed, and only one set of lifting frames 14 has its convex shaft 20 in the V-shaped groove 2102 (the corresponding yarn clamping spring 8 may not be loaded with the fiber 12 to be tested). When the rotating cage 7 is stacked on the rotating transmission component 5, the remaining lifting frames 14 are in a state of blocking the side of the stop component 11. At the same time, the pressure roller 15 cooperates with the stop component 11 to constrain and limit the fiber. This ensures that when the rotating cage 7 drives the fiber and sample clamp 13 to rotate so that the fiber changes position for easy detection by the optical detection device 3, the fiber will not be displaced due to inertia or centrifugal force. This ensures that when the fiber moves to the predetermined position and stops, there will be no shaking, thereby improving the detection accuracy. Specifically:

[0073] During the rotation of the rotating cage 7, each convex shaft 20 can roll relative to the fan-shaped groove 2101 and the V-shaped groove 2102. When the lifting frame 14 corresponding to the convex shaft 20 rotates to the predetermined position, the convex shaft 20 just moves to the side of the V-shaped groove 2102 parallel to the axial direction of the annular guide 21. At this time, the columnar spring 19 releases elastic potential energy, which enables the lifting frame 14 to move toward the annular guide 21. During this process, the pressure roller 15 can move along the length of the fiber and, after performing a "straightening" action on the fiber, moves away from the stop 11. At this time, the lifting frame 14 drops to the maximum height, so that the sample holder 13 and the fiber can be exposed to the field of view of the optical detection device 3, thereby ensuring the feasibility and accuracy of data acquisition.

[0074] Please see Figure 2 , Figure 4 , Figures 7-8 The lifting member is fixedly installed on the turntable 4. The lifting member is a limiting member 23 fixedly installed on the turntable 4. The limiting member 23 is coaxial with the rotary transmission member 5. When the tray 6 moves toward the turntable 4, the limiting member 23 enables the annular guide member 21 to move upward relative to the tray 6.

[0075] As the tray 6 moves away from the turntable 4, the lifting frame 14 and the annular guide 21 are at their lowest points of travel under the influence of gravity. At this time, the stop 11 is exposed, allowing the sample clamp 13 to be better positioned on one side of the stop 11 when the fiber is clamped onto the yarn clamping spring 8. After the fiber is clamped, the tray 6 moves toward the turntable 4, and the limiting member 23 pushes the annular guide 21 upward. At this time, the annular guide 21 and the lifting frame 14 move upward relative to the tray 6, allowing multiple sets of lifting frames 14 and corresponding pressure rollers 15 to perform limiting actions on the corresponding fibers. This ensures the positional stability of the fibers during the rotation of the drum 7 and after the drum 7 stops, thus improving the detection accuracy.

[0076] Please see Figures 2-5The loading device further includes: an insertion groove 501 disposed on the rotary transmission member 5 and an insertion rod 9 connected to the rotating cage 7. The end of the insertion rod 9 is provided with a tapered portion 901, and the insertion rod 9 is provided with a fitting shaft 902, which is adapted to a limiting groove disposed in the insertion groove 501.

[0077] The limiting groove includes multiple sets of fitting grooves 503 arranged circumferentially and equidistantly on the inner wall of the insertion groove 501. Two sets of guide surfaces 502 are symmetrically arranged at the upper end of the fitting groove 503. The guide surfaces 502 can guide the fitting shaft 902 into the fitting groove 503.

[0078] During the movement of the tray 6 toward the turntable 4, the corresponding insertion rod 9 can be inserted into the insertion slot 501. The tapered part 901 makes it easier for the insertion rod 9 to be inserted into the insertion slot 501, thereby preventing the tray 6 from slightly shifting during the movement, which would cause the insertion rod 9 and the insertion slot 501 to be unable to be precisely coaxial, thus preventing the insertion rod 9 from being accurately inserted into the insertion slot 501.

[0079] During the process of inserting the insertion rod 9 into the insertion groove 501, under the action of the guide surface 502, the fitting shaft 902 can be guided into the fitting groove 503, thereby realizing the axial locking of the rotary transmission component 5 and the rotating cage 7, and avoiding the relative sliding between the rotating cage 7 and the rotary transmission component 5 at the moment of rotation, which would cause the limit position to deviate from the predetermined position after the rotary transmission component 5 stops rotating at a predetermined angle, thus affecting the detection accuracy.

[0080] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0081] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Single fiber heat shrinkage rate tester, including: Automatic constant temperature drying oven, loading device, robotic arm and optical inspection device; The loading device includes a turntable and a tray arranged in parallel. Multiple sets of rotary transmission components are rotatably mounted on the turntable. A rotating cage adapted to the rotary transmission components is provided on the tray. Multiple sets of yarn clamping springs and stop components adapted to the yarn clamping springs are arranged circumferentially on the rotating cage. Its characteristic is that it further includes: A bottom support is connected to the rotating cage, and multiple sets of lifting frames are slidably installed on the bottom support. The lifting frames are provided with guide grooves. A triggering component is disposed between the bottom support and the stop. The triggering component cooperates with the pressure roller disposed in the guide groove, and can cause the pressure roller to tend to stay at the end of the guide groove when the lifting frame moves to the end of the stroke. An elastic support assembly is connected to the bottom support and the lifting frame. The elastic support assembly is provided with an axial groove, which engages with a convex shaft connected to the lifting frame. It can move when the lifting frame is oriented to a predetermined position to expose the yarn. The bottom support is coaxially and fixedly connected to the rotating cage, and a protruding ring is provided at the bottom of the bottom support, which is adapted to the limiting hole provided on the tray; The directional groove includes a first inclined groove and a second inclined groove disposed on the lifting frame, and the connection between the first inclined groove and the second inclined groove forms an upwardly extending protrusion. Limiting rollers are provided on both sides of the pressure roller, and the limiting rollers can roll within the first inclined groove and the second inclined groove; The triggering component includes a first triggering element disposed on the bottom support and a second triggering element fixedly connected to the stop. The first triggering element and the second triggering element are respectively provided with inclined surfaces that guide the pressure roller to move along the first inclined groove and the second inclined groove. The inclined surface provided on the second trigger can form an acute angle with the direction of the second inclined groove toward the protrusion.

2. The single-fiber heat shrinkage rate tester according to claim 1, characterized in that, The elastic support component includes: The elastic structure is provided on the bottom support and the lifting frame; An annular guide is slidably connected to a guide rod disposed on the tray. An axial groove is disposed within the annular guide. When the convex shaft moves to a predetermined position, the elastic structure can drive the lifting frame to move toward the annular guide. A lifting member is fixedly installed on the turntable, and when the tray moves toward the turntable, the lifting member can lift the annular guide upward.

3. The single-fiber heat shrinkage rate tester according to claim 2, characterized in that, The elastic structure includes a telescopic rod connecting the bottom support and the lifting frame. A cylindrical spring is sleeved on the telescopic rod, with one end of the cylindrical spring connected to the lifting frame and the other end connected to the bottom support.

4. The single-fiber heat shrinkage rate tester according to claim 2, characterized in that, The axial groove includes a fan-shaped groove disposed on the annular guide and a V-shaped groove connected to the fan-shaped groove. One side of the V-shaped groove is parallel to the axial direction of the annular guide, and the other side is inclined.

5. The single-fiber heat shrinkage rate tester according to claim 2, characterized in that, The lifting member is a limiting member fixedly installed on the turntable. The limiting member is coaxial with the rotary transmission member. When the tray moves toward the turntable, the limiting member enables the annular guide member to move upward relative to the tray.

6. The single-fiber heat shrinkage rate tester according to claim 1, characterized in that, Also includes: An insertion groove is provided on the rotary transmission component, and an insertion rod is connected to the rotating cage. The end of the insertion rod is provided with a tapered portion, and a fitting shaft is provided on the insertion rod. The fitting shaft is adapted to a limiting groove provided in the insertion groove.

7. The single-fiber heat shrinkage rate tester according to claim 6, characterized in that, The limiting groove includes multiple sets of fitting grooves arranged circumferentially at equal intervals on the inner wall of the insertion groove. Two sets of guide surfaces are symmetrically arranged at the upper end of the fitting groove, and the guide surfaces can guide the fitting shaft into the fitting groove.

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