A tension detection device and method for a sock

Abstract

The present application belongs to the technical field of detection equipment, and discloses a sock tension detection equipment and a detection method. The sock tension detection equipment and the detection method comprise a base, a center rod and a top shell. The bottom end of the center rod is movably connected to the middle part of the base. The middle part of the bottom wall of the top shell is fixedly connected to the top end of the center rod. The bottom wall of the top shell is provided with a plurality of detection mechanisms for sock tension detection. Each detection mechanism is arranged in a ring shape with the center rod shaft as a reference. The sock tension detection equipment and the detection method can move the sock by using the design of the locking assembly, move the sock to the expansion assembly position at different positions, change the detection position, realize the segmented test of the sock, and are especially suitable for the full segment detection of long socks such as long socks and pantyhose. The detection operation is basically not limited by the length of the sock. At the same time, the relative movement of the locking assembly can also perform axial stretching test on the sock. The structure is simple and efficient, and solves the problems raised in the background art.

Description

Technical Field

[0001] This invention relates to the technical field of testing equipment, specifically to a tension testing device and method for socks. Background Technology

[0002] The current market demands higher comfort levels for socks. Beyond meeting national standards, personalized design often becomes a highlight, such as using composite materials in the weaving process and tailoring designs to different parts of the foot. Socks undergo random sampling inspection during production, with tension testing being one aspect. Currently, most sock tension testing equipment on the market is designed based on national standards (FZ / T 70019-2024 Test Method for Elongation Value of Socks; FZ / T 73001-2016 Socks; GB / T Standard 3923.1-2013 (Textiles - Tensile Properties of Fabrics - Part 1) can only perform single-pass tensile or expansion tests on the entire sock, and cannot perform segmented, fixed-point, and multi-dimensional tension tests on key stress areas such as the sock cuff, instep, and toe. For long socks such as thigh-highs and pantyhose, problems such as uneven stretching, positioning misalignment, and data distortion are prone to occur during testing. In addition, the degree of automation is low, there is a lot of manual intervention, the testing efficiency is low, and the data repeatability is poor, making it difficult to meet the high-precision, high-efficiency, and multi-dimensional tension testing requirements in large-scale production. Therefore, we propose a tension testing device and method for socks. Summary of the Invention

[0003] The purpose of this invention is to provide a tension testing device and method for socks, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tension testing device and method for socks, comprising a base, a central rod, and a top shell. The bottom end of the central rod is movably connected to the middle of the base, and the middle of the bottom wall of the top shell is fixedly connected to the top end of the central rod. The bottom wall of the top shell is provided with a plurality of testing mechanisms for sock tension testing, and each testing mechanism is arranged in a ring with the axis of the central rod as a reference.

[0005] The detection mechanism includes a positioning tube, a locking assembly, a through rod, a linear drive assembly one, a linear drive assembly two, a transmission assembly, and an expansion assembly. The positioning tube is fixedly connected to the bottom wall of the top shell. The three locking assemblies are coaxial and distributed vertically. The upper locking assembly is fixedly connected to the bottom end of the positioning tube. The upper surfaces of the two lower locking assemblies are fixedly connected with through rods, the other ends of which extend into the top shell. The two linear drive assemblies one are installed on the top wall of the top shell. The output ends of the two linear drive assemblies one are respectively connected to the through rods on the two locking assemblies to drive them to move up and down. The transmission assembly is located on the bottom wall of the top shell and inside the positioning assembly. The linear drive assembly two is installed inside the top shell to drive the transmission assembly. The expansion assembly is located on the transmission assembly and is driven by it to expand outward.

[0006] Preferably, the locking assembly includes a positioning ring, a mounting ring, an ultrasonic motor, a driven ring, a positioning insert, a tension spring, and through holes. The positioning ring of the upper locking assembly is fixedly connected to the bottom end of the side wall of the positioning tube, and the two are coaxial. The positioning rings of the two lower locking assemblies are fixedly connected to the corresponding through rods. A cavity is opened in the positioning ring, and the mounting ring is fixedly connected to the inner side wall of the cavity. The ultrasonic motor is mounted on the upper surface of the mounting ring, and the driven ring is fixedly connected to the output end of the ultrasonic motor. Several positioning inserts are movably connected to the outer side wall of the driven ring. One side of the positioning insert is movably connected to the outer side wall of the driven ring through a tension spring. Several through holes are opened on the outer side wall of the positioning ring and communicate with the cavity. The end of each positioning insert away from the driven ring is inserted into the corresponding through hole.

[0007] Preferably, the ultrasonic motor, driven ring, and positioning ring are coaxial, the number of positioning plates and perforations are the same and they are all arranged in a ring with reference to the positioning ring axis, and the end of the positioning plate away from the driven ring is comb-shaped.

[0008] Preferably, the two lower locking components each have two insert rods arranged symmetrically, and the inner wall of the positioning tube has four guide grooves arranged in a ring for the insert rods to pass through. The locking component located in the middle has a notch on the inner side of its positioning ring for the insert rods on the lower locking component to pass through.

[0009] Preferably, the transmission assembly includes a positioning post, a push rod, a rack, mounting strips, a connecting ring, a slotted hole, a cam, and a driven tooth. The positioning post is fixedly connected to the bottom wall of the top shell and is coaxial with the positioning tube. A push rod is inserted into the hole in the middle of the positioning post. The top end of the push rod extends into the top shell and is fixedly connected to the output end of the second linear drive assembly. The bottom end of the push rod extends downward toward the positioning post. The push rod is a polygonal prism, and a rack is installed on each side wall of the push rod. Several mounting strips are fixedly connected between the two connecting rings. Any connecting ring is fixedly connected to the bottom of the positioning post, and the connecting ring is coaxial with the positioning post. Each mounting strip is opposite to each side wall of the positioning rod. A slotted hole is opened on the mounting strip, and a cam is movably connected in the slotted hole. A driven tooth is provided on the large end side of the cam and meshes with the rack. The expansion assembly is movably connected to the mounting strip and is pushed by the cam.

[0010] Preferably, the expansion assembly includes a movable strip, a second tension spring, a transmission groove, a guide rod, a guide hole, a transmission column, a mounting groove, a pressure sensor, an annular cover, a pressure block, a connecting column, and an expansion plate. The two ends of one side of the movable strip are movably connected to the side of the mounting strip away from the top rod via the second tension spring. The transmission groove is located on the side of the movable strip near the cam, with the small end of the cam contacting the inner wall of the transmission groove. Guide holes are provided at both ends of the movable strip, and the guide rod is inserted into the guide hole, with one end of the guide rod fixedly connected to the movable strip. Two transmission columns are fixedly connected to the side of the movable strip away from the mounting strip. A mounting groove is provided at the end of the transmission column away from the movable strip. The pressure sensor is mounted on the bottom wall of the mounting groove. The pressure block is located in the mounting groove and contacts the detection end of the pressure sensor. The annular cover is fixedly connected to the opening of the mounting groove to limit the pressure block. The connecting column is inserted into the annular cover, with one end fixedly connected to the pressure block. One side of the expansion plate is fixedly connected to the two connecting columns.

[0011] Preferably, both ends of the expansion plate are bent into an arc shape towards the movable strip, and the edge of the expansion plate away from the movable strip is rounded.

[0012] Preferably, both sides of the bottom wall of the transmission groove are arc-shaped to adapt to the shape of the small end of the cam, and the number of cams is not less than one.

[0013] Preferably, the bottom end of the central rod extends to the inner side of the base and is fixedly connected to an adjusting ring. The outer side wall of the adjusting ring has four arc-shaped grooves. The bottom wall of the base, which is located around the adjusting ring, has four limiting springs installed. The middle part of the limiting springs is arc-shaped and is engaged in the corresponding arc-shaped groove.

[0014] A material drop frame is installed on the central rod above the base. The material drop frame is divided into four spaces by four partitions, each corresponding to a detection mechanism.

[0015] A testing method for a tension testing device for socks, the testing method comprising the following steps:

[0016] Step 1: Sock loading and initial locking: The sock to be tested is manually put on the outside of the testing mechanism from bottom to top, so that the sock opening naturally covers the position of the upper locking component. Then the upper locking component is activated, the ultrasonic motor drives the driven ring to rotate, and the positioning insert plate extends out from the perforation. The comb-shaped end gently pierces into the fiber structure of the sock opening and completes stable clamping, reliably fixing the sock opening and preventing slippage or displacement during the testing process, providing a stable axial positioning reference for subsequent segmented testing.

[0017] Step 2, Segmented Stretching and Expansion Testing: Driven by linear drive component one, the two lower locking components move synchronously downwards along the guide groove on the inner wall of the positioning tube. During the downward movement, the sock body is segmented and positioned, and the corresponding segments of the sock are subjected to axial tension testing through relative vertical movement, simulating the longitudinal force state when the sock is actually worn. When the lower locking component reaches the bottom and the middle locking component reaches the top, the segmented positioning is completed. Linear drive component two is activated, driving the expansion component to expand outwards through the transmission component, and radial expansion tension testing is performed on the segmented and positioned areas of the sock. The pressure sensor collects tension data in real time. This process of segmented downward movement—stretching—expansion is cyclically advanced to complete the segmented testing of all areas of the sock body. When the testing reaches the toe area of ​​the sock, the three locking components move closer and fit together to stably position the toe area, and the expansion component performs the expansion action to complete the tension testing at the toe area.

[0018] Step 3: Unloading, Cuff Re-inspection, and Sorting: After the main body and toe area of ​​the sock have been fully inspected, the two locking components on the lower side work together under the drive of the linear drive component to gradually remove the sock from the inspection mechanism from bottom to top. During the unloading process, when the cuff moves down with the sock to the position of the corresponding expansion component, the expansion component starts working again to perform a special expansion test on the cuff to ensure that the elasticity and tension of the cuff meet the standards. After the cuff inspection is completed, the two locking components on the lower side continue to work together to move downward, so that the sock is completely freed from the clamping range of all locking components. Under its own gravity, the sock falls into the corresponding section in the dropping box, completing the entire process of loading, segmented inspection, unloading, re-inspection, and sorting of the sock.

[0019] By adopting the aforementioned technical solution, the beneficial effects of the present invention are:

[0020] 1. The tension testing equipment and method for this sock utilizes a locking component design to move the sock to different positions, changing the testing position and enabling segmented testing of the sock. It can accurately test the tension of different areas such as the sock cuff, calf, ankle, and foot, segment by segment. It is particularly suitable for full-length testing of long socks such as stockings and pantyhose. The testing operation is largely unrestricted by sock length and can be adapted to universal testing of socks of different lengths and styles. Simultaneously, the relative movement of the locking components allows for axial tensile testing of the sock. Through the opposing or receding movements of the upper and lower locking components, axial tension is achieved at a fixed distance and force, simulating the longitudinal force state during actual wear. The structure is simple and efficient, solving the problems mentioned in the background technology.

[0021] 2. The tension testing equipment and method for this sock utilizes the design of a transmission component and an expansion component to perform lateral expansion testing on the sock. The transmission component adopts a rack and pinion cam transmission structure, which provides smooth transmission, high precision, and fast response, and can accurately control the expansion amplitude and speed. The structure is simple and efficient. The bending design at both ends of the expansion plate can reduce damage to the sock, avoid scratching or tearing the sock during expansion, and protect the integrity of the sample. At the same time, the pressure sensor can detect the tension of the sock when it is expanded and acquire data in real time.

[0022] 3. The tension testing equipment and method for these socks adopts a multi-detection mechanism in a circular arrangement, which can simultaneously test multiple socks in parallel, greatly improving testing efficiency. The central rod can be rotated for positioning, and together with the material drop box for partitioned storage, it realizes integrated testing and sorting operations. The locking component is driven by an ultrasonic motor, which is precise in positioning and gentle in action, making it suitable for non-destructive testing of thin and highly elastic socks. The overall structure is compact and occupies little space, making it easy to integrate into automated production lines and meet the needs of industrial batch testing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0025] Figure 3 This is a bottom view of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 This is a partial cross-sectional view of the present invention;

[0028] Figure 6This is a schematic diagram of the assembly structure of the locking component, transmission component, and expansion component of the present invention;

[0029] Figure 7 This is a schematic diagram of the assembly structure of the transmission component and expansion component of the present invention;

[0030] Figure 8 This is a schematic diagram of the transmission component of the present invention;

[0031] Figure 9 This is a front view of the assembly structure of the transmission component and expansion component of the present invention;

[0032] Figure 10 For the present invention Figure 9 AA section diagram;

[0033] Figure 11 For the present invention Figure 10 Enlarged view of point B in the middle;

[0034] Figure 12 For the present invention Figure 10 Enlarged view of point C in the middle;

[0035] Figure 13 This is a schematic diagram of the connection structure of the positioning tube and locking assembly of the present invention;

[0036] Figure 14 This is a front view of the positioning tube and locking assembly of the present invention;

[0037] Figure 15 For the present invention Figure 14 Cross-sectional view at point BB;

[0038] Figure 16 For the present invention Figure 15 Enlarged view of point D in the middle;

[0039] Figure 17 For the present invention Figure 14 Cross-sectional view at point C;

[0040] Figure 18 For the present invention Figure 17 Enlarged view at point E in the middle;

[0041] Figure 19 This is a schematic diagram of the connection structure of the locking component and the insertion rod of the present invention.

[0042] In the diagram: 1. Base; 2. Center rod; 3. Top shell; 4. Locking assembly; 41. Positioning ring; 42. Mounting ring; 43. Ultrasonic motor; 44. Driven ring; 45. Positioning insert plate; 46. Tension spring one; 47. Through hole; 5. Through rod; 6. Linear drive assembly one; 7. Linear drive assembly two; 8. Transmission assembly; 81. Positioning pin; 82. Top rod; 83. Rack; 84. Mounting strip; 85. Connecting ring; 86. Strip hole; 87. 88. Cam; 9. Driven gear; 10. Expansion assembly; 11. Moving bar; 12. Tension spring II; 13. Transmission groove; 14. Guide rod; 15. Guide hole; 16. Transmission column; 17. Mounting groove; 18. Pressure sensor; 19. Annular cover; 10. Pressure block; 10. Connecting column; 11. Expansion plate; 12. Positioning tube; 13. Guide groove; 14. Adjusting ring; 15. Arc groove; 16. Limiting spring; 17. Material drop frame; 18. Partition plate. Detailed Implementation

[0043] Please see Figure 1-19 The present invention provides a technical solution: a tension testing device and method for socks, comprising a base 1, a central rod 2 and a top shell 3. The bottom end of the central rod 2 is movably connected to the middle of the base 1, and the middle of the bottom wall of the top shell 3 is fixedly connected to the top end of the central rod 2. The bottom wall of the top shell 3 is provided with a plurality of testing mechanisms for sock tension testing, and each testing mechanism is arranged in a ring with the axis of the central rod 2 as a reference.

[0044] The bottom end of the center rod 2 extends to the inner side of the base 1 and is fixedly connected to an adjusting ring 12. The outer side wall of the adjusting ring 12 has four arc-shaped grooves 13. The bottom wall of the base 1, which is located around the adjusting ring 12, has four limiting springs 14. The middle part of the limiting springs 14 is arc-shaped and is engaged in the corresponding arc-shaped grooves 13. When the center rod 2 is rotated, the adjusting ring 12 rotates synchronously with it. The limiting springs 14 and the arc-shaped grooves 13 cooperate to achieve gear positioning, which is convenient for operators.

[0045] A drop box 15 is installed on the central rod 2 and above the base 1. The drop box 15 is divided into four spaces by four partitions 16, each corresponding to one of the four detection mechanisms. After detection, the socks are pushed by the locking component 4 to fall into the corresponding drop box 15, facilitating storage for group detection by operators. Please refer to [link / reference]. Figure 6 The lower side of the positioning ring 41 of the locking component 4 located at the bottom is chamfered to facilitate the sock cuff to detach. The upper side of the positioning ring 41 of the locking component 4 located at the top is also chamfered to facilitate the sock segment detection process, so that the detected part can detach from the positioning ring 41 and move onto the positioning tube 10.

[0046] The testing mechanism includes a positioning tube 10, locking components 4, inserting rods 5, linear drive components 6 and 7, a transmission component 8, and an expansion component 9. The positioning tube 10 is fixedly connected to the bottom wall of the top shell 3. The three locking components 4 are coaxial and distributed vertically. The upper locking component 4 is fixedly connected to the bottom end of the positioning tube 10. The upper surfaces of the two lower locking components 4 are fixedly connected to inserting rods 5, with the other ends of the inserting rods 5 extending into the top shell 3. The two linear drive components 6 are installed on the top wall of the top shell 3. The output end of component 6 is connected to the insertion rods 5 on the two locking components 4 to drive them to move up and down. The linear drive component 6 can be an electric push rod, a cylinder, etc., to drive the two lower locking components 4 to rise and fall independently, so as to realize the segmented displacement and axial stretching of the sock. The transmission component 8 is set on the bottom wall of the top shell 3 and is located inside the positioning component. The linear drive component 7 is installed inside the top shell 3 to drive the transmission component 8. The linear drive component 7 can also be an electric push rod or a cylinder. The expansion component 9 is set on the transmission component 8 and is driven by it to expand outward.

[0047] The locking assembly 4 includes a positioning ring 41, a mounting ring 42, an ultrasonic motor 43, a driven ring 44, positioning inserts 45, a tension spring 46, and perforations 47. The positioning ring 41 of the upper locking assembly 4 is fixedly connected to the bottom end of the side wall of the positioning tube 10, and the two are coaxial. The positioning rings 41 of the two lower locking assemblies 4 are fixedly connected to the corresponding insert rods 5. A cavity is formed inside the positioning ring 41, and the mounting ring 42 is fixedly connected to the inner side wall of the cavity. The ultrasonic motor 43 is mounted on the upper surface of the mounting ring 42, and the driven ring 44 is fixedly connected to the output end of the ultrasonic motor 43. Several positioning inserts 45 are movably connected to the outer side wall of the driven ring 44, with one side of each positioning insert 45 movably connected to the outer side wall of the driven ring 44 via a tension spring 46. Several perforations 47... The positioning plates 45 are located on the outer wall of the positioning ring 41 and communicate with the cavity. The end of each positioning plate 45 away from the driven ring 44 is inserted into the corresponding perforation 47. The ultrasonic motor 43, the driven ring 44 and the positioning ring 41 are coaxial. The number of positioning plates 45 and perforations 47 are the same and they are all arranged in a ring with the axis of the positioning ring 41 as a reference. The end of the positioning plate 45 away from the driven ring 44 is comb-shaped. The ultrasonic motor 43 drives the driven ring 44 to rotate, which causes the positioning plate 45 to extend and retract along the perforation 47. The comb-shaped end can gently penetrate the sock fibers to achieve locking without damaging the sock. The tension spring 46 provides the restoring force to ensure that the locking and releasing actions are stable and reliable. The ultrasonic motor 43 drives the driven ring 44 to reverse and retract the positioning plate 45 to remove it from the sock, thus releasing the sock.

[0048] The two locking components 4 on the lower side each have two symmetrically arranged insertion rods 5. The inner wall of the positioning tube 10 has four guide grooves 11 arranged in a ring for the insertion rods 5 to pass through. The locking component 4 in the middle has a notch on the inner side of its positioning ring 41 for the insertion rods 5 on the lower locking component 4 to pass through. The symmetrical insertion rods 5 cooperate with the guide grooves 11 to ensure that the locking component 4 does not shake or deviate when it is raised or lowered, and has high motion accuracy. The notch design avoids motion interference and ensures that the two locking components 4 on the lower side can move up and down independently.

[0049] The transmission assembly 8 includes a positioning pin 81, a push rod 82, a rack 83, mounting strips 84, a connecting ring 85, a slotted hole 86, a cam 87, and a driven gear 88. The positioning pin 81 is fixedly connected to the bottom wall of the top shell 3 and is coaxial with the positioning tube 10. The push rod 82 is inserted into the hole in the middle of the positioning pin 81. The top end of the push rod 82 extends into the top shell 3 and is fixedly connected to the output end of the linear drive assembly 7. The bottom end of the push rod 82 extends downward toward the positioning pin 81. The push rod 82 is a polygonal prism, and racks 83 are installed on each side wall of the push rod 82. Several mounting strips 84 are fixedly connected between the two connecting rings 85. The ring 85 is fixedly connected to the bottom of the positioning post 81, and the ring 85 and the positioning post 81 are coaxial. Each mounting strip 84 is opposite to each side wall of the positioning rod. The mounting strip 84 has a strip hole 86, and a cam 87 is movably connected in the strip hole 86. The large end of the cam 87 is provided with a driven tooth 88 that meshes with the rack 83. The expansion component 9 is movably connected to the mounting strip 84 and is pushed by the cam 87. The linear drive component 7 drives the push rod 82 to move up and down. The rack 83 drives the cam 87 to rotate, converting the linear motion into expansion thrust. It has high transmission efficiency and precise control, and can achieve small-amplitude high-precision expansion.

[0050] The expansion assembly 9 includes a movable bar 91, a tension spring 92, a transmission groove 93, a guide rod 94, a guide hole 95, a transmission post 96, a mounting groove 97, a pressure sensor 98, an annular cover 99, a pressure block 910, a connecting post 911, and an expansion plate 912. The two ends of one side of the movable bar 91 are movably connected to the side of the mounting bar 84 away from the top rod 82 via the tension spring 92. The transmission groove 93 is located on the side of the movable bar 91 near the cam 87, with the small end of the cam 87 contacting the inner wall of the transmission groove 93. Guide holes 95 are provided at both ends of the movable bar 91, and the guide rod 94 is inserted into the guide holes 95, with one end of the guide rod 94 fixedly connected to the movable bar 91. Two transmission posts 96 are fixedly connected to the side of the movable bar 91 away from the mounting bar 84, and the end of each transmission post 96 away from the movable bar 91 has a mounting groove 97. Pressure sensor 98 is installed on the bottom wall of mounting groove 97. Pressure block 910 is located in mounting groove 97 and contacts the detection end of pressure sensor 98. Annular cover 99 is fixedly connected to the opening of mounting groove 97 to limit pressure block 910. Annular cover 99 is threaded into mounting groove 97 for easy disassembly. Connecting post 911 is inserted into annular cover 99, and one end of it is fixedly connected to pressure block 910. One side of expansion plate 912 is fixedly connected to two connecting posts 911. Cam 87 rotates to push movable bar 91 outward. Tension spring 92 provides reset force. Guide rod 94 and guide hole 95 ensure linearity of movement. The tension generated by expansion plate 912 contacting sock is transmitted to pressure sensor 98 through connecting post 911 and pressure block 910 to detect tension value in real time. Annular cover 99 prevents pressure block 910 from falling off and ensures detection stability.

[0051] The two ends of the expansion plate 912 are bent into arcs towards the movable strip 91, and the edge of the expansion plate 912 away from the movable strip 91 is rounded. The arc structure fits the curved surface of the sock, and the rounding treatment avoids sharp edges from scratching the sock, thus achieving non-destructive expansion testing.

[0052] Both sides of the bottom wall of the transmission groove 93 are curved to fit the shape of the small end of the cam 87. There is no less than one cam 87. The curved transition reduces friction loss and extends service life. Multiple cams 87 are driven synchronously, and the expansion force is more even.

[0053] It should be noted that this technical solution also includes necessary control components to control the working status of the ultrasonic motor 43, pressure sensor 98, linear drive assembly 6 and linear drive assembly 7. It only involves the opening and closing and stroke control of the relevant electrical components. The relevant control methods are well known to those skilled in the art and will not be described in detail.

[0054] The operation of this equipment includes the following steps:

[0055] Step 1: Sock loading and initial locking: The sock to be tested is manually put on the outside of the testing mechanism from bottom to top, so that the sock opening naturally covers the position of the upper locking component 4. Then the upper locking component 4 is activated, and the ultrasonic motor 43 drives the driven ring 44 to rotate, which drives the positioning insert 45 to extend out from the perforation 47. The comb-shaped end gently pierces into the fiber structure of the sock opening and completes stable clamping, reliably fixing the sock opening and preventing slippage or displacement during the testing process, providing a stable axial positioning reference for subsequent segmented testing.

[0056] Step 2, Segmented Stretching and Expansion Detection: Driven by the linear drive component 1 6, the two lower locking components 4 move synchronously downwards along the guide groove 11 on the inner wall of the positioning tube 10. During the downward movement, the sock body is segmented and positioned, and the corresponding segments of the sock are subjected to axial tension testing through relative up and down movement, simulating the longitudinal force state when the sock is actually worn. When the lower locking component 4 reaches the bottom and the middle locking component 4 reaches the top, the segmented positioning is completed. The linear drive component 2 7 is activated, and the expansion component 9 is driven outwards through the transmission component 8 to perform radial expansion tension detection on the segmented and positioned areas of the sock. The pressure sensor 98 collects tension data in real time. This process of segmented downward movement, stretching, and expansion is repeated in sequence to complete the segmented detection of all areas of the sock body. When the detection reaches the toe area of ​​the sock, the three locking components 4 move closer to each other and fit together, stabilizing the toe area at the bottom of the expansion component 9. The expansion component 9 performs the expansion action to complete the tension detection at the toe area.

[0057] Step 3: Unloading, Sock Cuff Re-inspection, and Sorting: After the main body and toe area of ​​the sock have been fully inspected, the two locking components 4 on the lower side work together under the drive of the linear drive component 6 to gradually remove the sock from the inspection mechanism from bottom to top. During the unloading process, when the sock cuff moves down to the position of the corresponding expansion component 9, the expansion component 9 starts working again to perform a special expansion test on the sock cuff to ensure that the elasticity and tension of the sock cuff meet the standards. After the sock cuff inspection is completed, the two locking components 4 on the lower side continue to work together to move downward, so that the sock is completely freed from the clamping range of all locking components 4. Under its own gravity, the sock falls into the corresponding section in the dropping frame 15, completing the entire process of loading, segmented inspection, unloading, re-inspection, and sorting of the sock.

[0058] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tension testing device for socks, comprising a base, a central rod, and a top shell, wherein the bottom end of the central rod is movably connected to the middle of the base, and the middle of the bottom wall of the top shell is fixedly connected to the top end of the central rod, characterized in that: The bottom wall of the top shell is provided with several detection mechanisms for sock tension detection, and each detection mechanism is arranged in a ring with the central rod axis as a reference. The detection mechanism includes a positioning tube, a locking assembly, a through rod, a linear drive assembly one, a linear drive assembly two, a transmission assembly, and an expansion assembly. The positioning tube is fixedly connected to the bottom wall of the top shell. The three locking assemblies are coaxial and distributed vertically. The upper locking assembly is fixedly connected to the bottom end of the positioning tube. The upper surfaces of the two lower locking assemblies are fixedly connected with through rods, the other ends of which extend into the top shell. The two linear drive assemblies one are installed on the top wall of the top shell. The output ends of the two linear drive assemblies one are respectively connected to the through rods on the two locking assemblies to drive them to move up and down. The transmission assembly is located on the bottom wall of the top shell and inside the positioning assembly. The linear drive assembly two is installed inside the top shell to drive the transmission assembly. The expansion assembly is located on the transmission assembly and is driven by it to expand outward.

2. The tension detecting device for a sock according to claim 1, wherein: The locking assembly includes a positioning ring, a mounting ring, an ultrasonic motor, a driven ring, a positioning insert, a tension spring, and through holes. The positioning ring of the upper locking assembly is fixedly connected to the bottom end of the side wall of the positioning tube, and the two are coaxial. The positioning rings of the two lower locking assemblies are fixedly connected to the corresponding through rods. A cavity is opened in the positioning ring, and the mounting ring is fixedly connected to the inner side wall of the cavity. The ultrasonic motor is mounted on the upper surface of the mounting ring, and the driven ring is fixedly connected to the output end of the ultrasonic motor. Several positioning inserts are movably connected to the outer side wall of the driven ring. One side of the positioning insert is movably connected to the outer side wall of the driven ring through a tension spring. Several through holes are opened on the outer side wall of the positioning ring and communicate with the cavity. The end of each positioning insert away from the driven ring is inserted into the corresponding through hole.

3. A sock tension detection device according to claim 2, wherein: The ultrasonic motor, driven ring, and positioning ring are coaxial. The number of positioning plates and perforations are the same and they are all arranged in a ring with the positioning ring axis as a reference. The end of the positioning plate away from the driven ring is comb-shaped.

4. The tension testing device for socks according to claim 3, characterized in that: The two locking components on the lower side each have two insert rods arranged symmetrically. The inner wall of the positioning tube has four guide grooves arranged in a ring for the insert rods to pass through. The locking component in the middle has a notch on the inner side of its positioning ring for the insert rods on the lower locking component to pass through.

5. A sock tension detection device according to claim 4, wherein: The transmission assembly includes a positioning post, a push rod, a rack, mounting strips, a connecting ring, a slotted hole, a cam, and a driven tooth. The positioning post is fixedly connected to the bottom wall of the top shell and is coaxial with the positioning tube. A push rod is inserted into the hole in the middle of the positioning post. The top end of the push rod extends into the top shell and is fixedly connected to the output end of the second linear drive assembly. The bottom end of the push rod extends downward toward the positioning post. The push rod is a polygonal prism, and a rack is installed on each side wall of the push rod. Several mounting strips are fixedly connected between two connecting rings. Any connecting ring is fixedly connected to the bottom of the positioning post, and the connecting ring is coaxial with the positioning post. Each mounting strip is opposite to each side wall of the positioning rod. A slotted hole is opened on the mounting strip, and a cam is movably connected in the slotted hole. A driven tooth is provided on the large end side of the cam and meshes with the rack. The expansion assembly is movably connected to the mounting strip and is pushed by the cam.

6. A sock tension detection device according to claim 5, wherein: The expansion assembly includes a movable bar, a second tension spring, a transmission groove, a guide rod, a guide hole, a transmission column, a mounting groove, a pressure sensor, an annular cover, a pressure block, a connecting column, and an expansion plate. The two ends of one side of the movable bar are movably connected to the side of the mounting bar away from the top rod via the second tension spring. The transmission groove is located on the side of the movable bar near the cam, with the small end of the cam contacting the inner wall of the transmission groove. Guide holes are provided at both ends of the movable bar, and the guide rod is inserted into the guide hole, with one end of the guide rod fixedly connected to the movable bar. Two transmission columns are fixedly connected to the side of the movable bar away from the mounting bar. A mounting groove is provided at the end of the transmission column away from the movable bar. The pressure sensor is mounted on the bottom wall of the mounting groove. The pressure block is located in the mounting groove and contacts the detection end of the pressure sensor. The annular cover is fixedly connected to the opening of the mounting groove to limit the pressure block. The connecting column is inserted into the annular cover, with one end fixedly connected to the pressure block. One side of the expansion plate is fixedly connected to the two connecting columns.

7. A sock tension detection device according to claim 6, wherein: Both ends of the expansion plate are bent into an arc shape towards the movable strip, and the edge of the expansion plate away from the movable strip is rounded.

8. A sock tension detection device according to claim 7, wherein: Both sides of the bottom wall of the transmission groove are curved to fit the shape of the small end of the cam, and the number of cams is not less than one.

9. The apparatus of claim 1, wherein: The bottom end of the central rod extends to the inner side of the base and is fixedly connected to an adjusting ring. The outer wall of the adjusting ring has four arc-shaped grooves. The bottom wall of the base and the periphery of the adjusting ring are equipped with four limiting springs. The middle part of the limiting springs is arc-shaped and is engaged in the corresponding arc-shaped groove. A material drop frame is installed on the central rod above the base. The material drop frame is divided into four spaces by four partitions, each corresponding to a detection mechanism.

10. The detection method of the tension detection device of the sock according to any one of claims 1-9, characterized in that: The detection method includes the following steps: Step 1: Sock loading and initial locking: The sock to be tested is manually put on the outside of the testing mechanism from bottom to top, so that the sock opening naturally covers the position of the upper locking component. Then the upper locking component is activated, the ultrasonic motor drives the driven ring to rotate, and the positioning insert plate extends out from the perforation. The comb-shaped end gently pierces into the fiber structure of the sock opening and completes stable clamping, reliably fixing the sock opening and preventing slippage or displacement during the testing process, providing a stable axial positioning reference for subsequent segmented testing. Step 2, Segmented Stretching and Expansion Testing: Driven by linear drive component one, the two lower locking components move synchronously downwards along the guide groove on the inner wall of the positioning tube. During the downward movement, the sock body is segmented and positioned, and the corresponding segments of the sock are subjected to axial tension testing through relative vertical movement, simulating the longitudinal force state when the sock is actually worn. When the lower locking component reaches the bottom and the middle locking component reaches the top, the segmented positioning is completed. Linear drive component two is activated, driving the expansion component to expand outwards through the transmission component, and radial expansion tension testing is performed on the segmented and positioned areas of the sock. The pressure sensor collects tension data in real time. This process of segmented downward movement—stretching—expansion is cyclically advanced to complete the segmented testing of all areas of the sock body. When the testing reaches the toe area of ​​the sock, the three locking components move closer and fit together to stably position the toe area, and the expansion component performs the expansion action to complete the tension testing at the toe area. Step 3: Unloading, Cuff Re-inspection, and Sorting: After the main body and toe area of ​​the sock have been fully inspected, the two locking components on the lower side work together under the drive of the linear drive component to gradually remove the sock from the inspection mechanism from bottom to top. During the unloading process, when the cuff moves down with the sock to the position of the corresponding expansion component, the expansion component starts working again to perform a special expansion test on the cuff to ensure that the elasticity and tension of the cuff meet the standards. After the cuff inspection is completed, the two locking components on the lower side continue to work together to move downward, so that the sock is completely freed from the clamping range of all locking components. Under its own gravity, the sock falls into the corresponding section in the dropping box, completing the entire process of loading, segmented inspection, unloading, re-inspection, and sorting of the sock.

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