High-quality yarn elasticity detection equipment

Abstract

The invention relates to the technical field of yarn detection, in particular to high-quality yarn elasticity detection equipment which comprises a plate frame, an L-shaped plate is slidably arranged on the plate frame in the vertical direction, a locking mechanism used for clamping yarn is jointly arranged on the L-shaped plate and the plate frame, and a driving mechanism used for moving the yarn is arranged on the plate frame. The upper clamping assembly is used for clamping the upper stress point of the yarn, and the left clamping piece and the right clamping piece are used for clamping the lower stress point of the yarn, so that the yarn part between the upper clamping assembly and the left clamping piece and the yarn part between the upper clamping assembly and the right clamping piece are subjected to stretching detection; meanwhile, the wavy section on the left clamping piece is matched with the arc-shaped surface on the right clamping piece, so that the contact area of the lower part of the yarn is increased on the basis of ensuring that the yarn can be vertically straightened, the clamping stability of the lower part of the yarn by the left clamping piece and the right clamping piece is improved, and the accuracy of a detection result is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of yarn detection, in particular to a high-quality yarn elasticity detection device. Background Art

[0002] Yarn elasticity testing is an important test to evaluate the ability of yarn to recover to its original shape after being stretched by external force. The yarn is stretched to a certain elongation and then the external force is removed. The recovered length of the yarn and its elongated length are recorded. The elastic recovery rate of the yarn is calculated by comparing the two. The higher the elastic recovery rate, the better the elasticity of the yarn.

[0003] At present, the electronic single yarn strength meter is mainly used to test the elasticity of the yarn. During the test, the operator fixes the yarn on the upper and lower clamps of the electronic single yarn strength meter, and then moves the lower clamp downward to drive the yarn to stretch, and then releases the lower clamp to allow the yarn to shrink and recover naturally, and at the same time records the elongation and recovery of the yarn.

[0004] However, when clamping the yarn, the yarn needs to remain in a vertical state without external force. Since the yarn is very light, it is difficult to keep the yarn in a vertical state by allowing it to fall solely by its own weight. When the yarn is manually pulled to make it vertical and clamped, the manual force is difficult to control and the yarn may easily stretch prematurely before testing, thereby affecting the accuracy of the test results.

[0005] In addition, when the clamping structure of the existing testing equipment clamps the yarn, the clamping direction of the lower part of the yarn is relatively single and the clamping contact area is small, which makes the clamping stability of the yarn by the existing clamping structure weak. The yarn is prone to slip during the tensile test, which further affects the accuracy of the test results. Summary of the invention

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-quality yarn elastic force detection device, including a plate frame, on which an L-shaped plate is slidably arranged in a vertical direction, the L-shaped plate and the plate frame are jointly provided with a locking mechanism for clamping the yarn, and the plate frame is provided with a driving mechanism for moving the yarn.

[0007] The locking mechanism includes an upper clamping assembly arranged on the upper front side of the plate frame for clamping and locking the upper force point of the yarn. A push plate No. 1 is provided on the left front side of the L-shaped plate transverse section for sliding along the left and right directions. A left clamping piece is fixedly installed on the right side of the No. 1 push plate and in front of the L-shaped plate transverse section. The left side of the left clamping piece is a cylindrical structure, and the right side of the left clamping piece is a wavy cross-section.

[0008] A second push plate is slidably arranged in the left - right direction at the front - right part of the horizontal section of the L - shaped plate. A right clamping member is fixedly installed on the front side of the second push plate. The right clamping member has a U - shaped structure. The left side surface of the vertical section of the right clamping member has an arc - shaped surface structure corresponding to and fitting with the wavy cross - section of the left clamping member. V - shaped grooves are vertically penetrated through both horizontal sections of the right clamping member.

[0009] A wire - clamping assembly is jointly arranged on the right clamping member and the left clamping member. The locking mechanism further includes an anti - slip assembly for locking the yarn at the lower part of the right clamping member.

[0010] The upper clamping assembly includes a fixed frame slidably arranged up and down at the upper part of the front side of the plate frame. Push springs are arranged between the upper and lower sides of the fixed frame and the plate frame respectively.

[0011] Preferably, a wire - clamping slot longitudinally arranged and vertically penetrated is formed on the fixed frame. The front end of the wire - clamping slot penetrates through the fixed frame, and the rear end of the wire - clamping slot is located at the central position of the fixed frame. Two symmetrically arranged upper clamping plates are slidably arranged left - right inside the fixed frame. A first bidirectional screw is rotatably arranged at the rear part of the fixed frame. The two threaded sections of the first bidirectional screw are respectively thread - connected to the corresponding upper clamping plates.

[0012] Preferably, the anti - slip assembly includes two symmetrically arranged connecting plates slidably arranged front - rear on the right side of the vertical section of the right clamping member. An L - shaped wire - clamping plate is slidably arranged up and down on the right side of the connecting plate. The horizontal section of the wire - clamping plate is located below the right clamping member. A tension spring is arranged between the connecting plate and the right clamping member. A third bidirectional screw is rotatably arranged at the rear part of the horizontal section of the L - shaped plate. The two threaded sections of the third bidirectional screw are respectively thread - connected to the first push plate and the second push plate.

[0013] Preferably, the anti - slip assembly further includes a pointed - head plate fixedly installed at the lower left part of the vertical section of the L - shaped plate. A chamfer is formed at the position near the pointed - head plate on the right side of the vertical section of the wire - clamping plate.

[0014] Preferably, a moving plate is slidably arranged in the vertical direction at the front side of the vertical section of the right clamping member. A plug rod is fixedly installed at the rear - right part of the moving plate. The plug rod is slidably inserted and connected in the vertical sections of the two wire - clamping plates in the front - rear direction. A track groove is formed at the front - right part of the horizontal section of the L - shaped plate. The right side of the track groove is a horizontal section, and the left side of the track groove is an obliquely downward - sloping section. The rear end of the plug rod is slidably connected to the track groove.

[0015] Preferably, the wire - clamping assembly includes two symmetrically arranged left clamping sleeves slidably sleeved on the outside of the left clamping member in the front - rear direction. Two symmetrically arranged right clamping plates are slidably arranged in the front - rear direction on the arc - shaped surface on the left side of the vertical section of the right clamping member.

[0016] Preferably, a No. 2 bidirectional screw is rotatably provided at the axial position of the left clamping member, and the two threaded sections of the No. 2 bidirectional screw are respectively threadedly connected to the left jacket at the corresponding positions, an insert plate is fixedly installed on the right side surface of the left jacket, and a positioning groove for inserting the insert plate is provided on the right clamping plate at the position corresponding to the insert plate.

[0017] Preferably, the right clamp is provided with two limit blocks symmetrically arranged front to back for sliding along the left and right directions, the limit blocks are used to be inserted into the positioning groove to lock the initial position of the right clamp, and a coil spring is provided between the limit blocks and the inner wall of the right clamp.

[0018] Preferably, the driving mechanism includes a lifting plate that is slidably arranged up and down on a plate frame, an adjusting screw is rotatably arranged at the lower part of the transverse section of the L-shaped plate, the adjusting screw is threadedly connected to the lifting plate, an electric push rod is fixedly installed on the plate frame, and the telescopic section of the electric push rod is fixedly connected to the lifting plate.

[0019] Preferably, a pointer is installed in the middle of the left side of the fixed frame, and an indicator plate is fixedly installed on the upper front side of the plate frame.

[0020] The beneficial effects of the present invention are as follows: 1. The present invention adopts an upper clamping assembly to clamp the upper stress point of the yarn, and clamps the lower stress point of the yarn by means of a left clamping member and a right clamping member, thereby performing a stretching test on the yarn portion between the upper clamping assembly and the left clamping member and the right clamping member. At the same time, the wavy cross-section on the left clamping member and the arc-shaped surface on the right clamping member cooperate to increase the contact area of ​​the lower part of the yarn while ensuring that the yarn can be vertically stretched, thereby increasing the stability of the left clamping member and the right clamping member in clamping the lower part of the yarn, thereby ensuring the accuracy of the test results.

[0021] 2. When the right clamping member of the present invention pushes the yarn to move to the left side, the right clamping member can guide and push the yarn to the middle thereof through the V-shaped groove thereon. When the yarn is straightened, the left clamping member and the right clamping member push the lower force point of the yarn to just below the upper clamping assembly, so that the yarn between the upper clamping assembly and the left clamping member and the right clamping member is arranged vertically. Subsequently, the left clamping member and the right clamping member are driven by the moving lifting plate to no longer pull and straighten the yarn, thereby preventing the yarn from stretching before the detection begins, and further ensuring the accuracy of the detection result.

[0022] 3. The present invention adopts a wire clamping assembly to clamp the lower part of the yarn in advance, so that the yarn is in a pre-straightened state before the left clamping member and the right clamping member push and clamp the yarn, and the lower part of the yarn is limited. In addition, the wire clamping assembly is used to assist in clamping the yarn by clamping and fixing the lower part of the yarn to prevent the yarn from slipping, thereby further increasing the stability of the yarn clamping.

[0023] Fourth, the present invention adopts an anti-slip component to clamp the yarn in the front-to-back direction on the basis of the left clamping member and the right clamping member clamping the yarn left and right, thereby further increasing the stability of the yarn clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a front view of the plate frame, L-shaped plate, driving mechanism and upper clamping assembly in the present invention.

[0027] Figure 3 It is a partial cross-sectional view of the fixing frame, the upper clamping plate and the No. 1 bidirectional screw in the present invention.

[0028] Figure 4 It is a partial cross-sectional view of the L-shaped plate and the locking mechanism after the upper clamp assembly is removed in the present invention.

[0029] Figure 5 It is a partial structural schematic diagram of the L-shaped plate, the right clamping member and the anti-slip assembly in the present invention.

[0030] Figure 6 It is a partial cross-sectional view of the L-shaped plate, the clamping plate, the pointed plate, the plug rod and the track groove in the present invention.

[0031] Figure 7 It is a structural schematic diagram of the left clamping member, the left clamping sleeve and the inserting plate in the present invention.

[0032] Figure 8 It is a partial cross-sectional view of the right clamping member, the right clamping plate, the positioning groove and the limiting block in the present invention.

[0033] In the figure: 1. plate frame; 2. L-shaped plate; 3. locking mechanism; 4. driving mechanism; 31. upper clamping assembly; 32. No. 1 push plate; 33. left clamping piece; 34. No. 2 push plate; 35. right clamping piece; 36. wire clamping assembly; 37. anti-skid assembly; 42. lifting plate; 43. adjusting screw; 44. electric push rod; 45. indicator board; 47. pointer; 311. fixing frame; 312. wire clamping seam; 313. upper clamping plate; 314. No. 1 two-way screw; 361. left clamping sleeve; 362. right clamping plate; 363. No. 2 two-way screw; 364. inserting plate; 365. positioning groove; 366. limiting block; 371. connecting plate; 372. wire clamping plate; 373. pointed plate; 374. moving plate; 375. plugging rod; 376. track groove; 377. No. 3 two-way screw. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product specifications are used.

[0035] See also Figure 1 A high-quality yarn elasticity detection device includes a plate frame 1, an L-shaped plate 2 is slidably arranged on the plate frame 1 in the vertical direction, a locking mechanism 3 for clamping the yarn is jointly arranged on the L-shaped plate 2 and the plate frame 1, and a driving mechanism 4 for moving the yarn is arranged on the plate frame 1.

[0036] When the yarn needs to be tested, the operator first fixes the upper stress point of the yarn at the corresponding position of the locking mechanism 3, and then fixes the lower stress point of the yarn through the locking mechanism 3, and at the same time adjusts the yarn to a vertical state under tension, and then adjusts the yarn from the tensioned state to a naturally falling state through the driving mechanism 4, so as to avoid the yarn from stretching before testing, and then drives the locking mechanism 3 to stretch the yarn through the driving mechanism 4, and then loosens the lower end of the yarn through the locking mechanism 3, so that the lower end of the yarn shrinks and recovers naturally, and records the recovered length of the yarn and its elongated length, so as to judge the elastic performance of the yarn.

[0037] See also Figure 1 , Figure 2 and Figure 3 The locking mechanism 3 includes an upper clamping assembly 31 arranged on the upper front side of the plate frame 1 for clamping and locking the upper force point of the yarn, the upper clamping assembly 31 includes a fixed frame 311 arranged on the upper front side of the plate frame 1 for sliding up and down, and push springs are arranged between the upper and lower sides of the fixed frame 311 and the plate frame 1, and a clamping seam 312 arranged longitudinally and passing through the upper and lower parts is opened on the fixed frame 311. The front end of the clamping seam 312 passes through the fixed frame 311, and the rear end of the clamping seam 312 is located at the center of the fixed frame 311. Two upper clamping plates 313 arranged symmetrically on the left and right are arranged inside the fixed frame 311 for sliding left and right. A No. 1 bidirectional screw 314 is rotatably arranged at the rear of the fixed frame 311, and the two threaded sections of the No. 1 bidirectional screw 314 are respectively threadedly connected with the upper clamping plate 313 at the corresponding positions.

[0038] When the yarn needs to be tested, the operator places the upper part of the yarn into the thread clamping seam 312 so that the yarn rests against the rear end of the thread clamping seam 312. The operator then manually turns the No. 1 bidirectional screw 314 so that the No. 1 bidirectional screw 314 drives the two upper clamps 313 to approach each other synchronously, thereby allowing the upper clamps 313 to clamp the yarn and at the same time allowing the upper force point of the upper clamp 313 to be located at the center of the fixed frame 311.

[0039] In this embodiment, a winding shaft located directly behind the wire clamping seam 312 can be arranged on the upper end surface of the fixed frame 311. After the yarn is wound around the winding shaft for a corresponding number of turns, it is placed into the wire clamping seam 312, so as to improve the clamping stability of the upper part of the yarn, and further increase the clamping stability of the upper clamping plate 313 on the upper part of the yarn.

[0040] Refer to Figure 1 、 Figure 4 and Figure 5 Refer to

[0041] Refer to Figure 4 、 Figure 5 and Figure 6 Refer to

[0042] In the initial state, the right clamping member 35 drives the chamfers on the two clamping plates 372 to abut against the inclined surfaces of the pointed head plate 373 through the connecting plates 371, so that the pointed head plate 373 pushes the corresponding clamping plates 372 in the front and rear directions respectively, thereby causing the two clamping plates 372 to move away from each other.

[0043] Refer to Figure 1 、 Figure 4 、 Figure 7 and Figure 8 Refer to

[0044] Refer to Figure 3 and Figure 4A third bidirectional screw 377 is rotatably provided at the rear of the transverse section of the L-shaped plate 2, and two threaded sections of the third bidirectional screw 377 are threadedly connected with the first push plate 32 and the second push plate 34 respectively.

[0045] When the upper part of the yarn is clamped on the upper clamping plate 313, the operator manually pulls the yarn downward and allows the yarn to pass through the V-shaped groove on the right clamping member 35, and the lower part of the yarn is located between the two clamping plates 372. By setting the V-shaped groove, the yarn can be located in the middle of the right clamping member 35.

[0046] Then the operator manually turns the No. 3 bidirectional screw 377, so that the No. 3 bidirectional screw 377 drives the No. 1 push plate 32 and the No. 2 push plate 34 to move closer to each other, and the No. 2 push plate 34 drives the two clamping plates 372 to move synchronously to the left to the left side of the pointed plate 373 through the right clamping member 35, so that the pointed plate 373 no longer pushes the two clamping plates 372, and the tension spring pulls the two connecting plates 371 closer to each other through its own resilience, so that the connecting plate 371 drives the clamping plate 372 to clamp and lock the lower part of the yarn, and at this time, due to the manual pulling of the yarn, the yarn is in a pre-straightened state when clamped on the clamping plate 372.

[0047] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 A movable plate 374 is provided on the front side of the vertical section of the right clamping member 35 for sliding in the vertical direction, and an insertion rod 375 is fixedly installed on the right rear side of the movable plate 374. The insertion rod 375 slides along the front and rear directions and is inserted and connected to the vertical sections of the two clamping plates 372. A track groove 376 is provided on the right front side of the transverse section of the L-shaped plate 2. The right side of the track groove 376 is a horizontal section, and the left side of the track groove 376 is an oblique section that gradually tilts downward. The rear end of the insertion rod 375 is slidably connected to the track groove 376.

[0048] When the right clamping member 35 moves to the left, it drives the movable plate 374 to move to the left synchronously. The movable plate 374 drives the insertion rod 375 to move along the track groove 376. The insertion rod 375 moves along the horizontal section of the track groove 376. The height of the insertion rod 375 remains unchanged. After the pointed plate 373 is separated from the two clamping plates 372, the tension spring pulls the two connecting plates 371 closer to each other through its own rebound force, so that the connecting plate 371 drives the clamping plate 372 to clamp and lock the lower part of the yarn. When the insertion rod 375 moves to the junction of the horizontal section and the oblique section of the track groove 376, the right clamping member 35 continues to move to the left, and the insertion rod 375 will move downward along the oblique section of the track groove 376.

[0049] The insertion rod 375 drives the two clamping plates 372 to move downward synchronously, so that the clamping plates 372 pull the yarn downward. When the clamping plates 372 clamp the yarn, the position of the clamping plates 372 clamping the yarn is located on the right side directly below the clamping seam 312, so that the yarn is in a state of gradually tilting toward the right side from top to bottom. When the clamping plates 372 drive the yarn to move to the left, the yarn will gradually change from an inclined state to a vertical state, and at the same time, the pre-stretched yarn will gradually change to a relaxed state. However, at this time, the clamping plates 372 move to the left and drive the yarn downward at the same time, so the yarn can always be kept in a pre-stretched state.

[0050] The operator continues to rotate the No. 3 bidirectional screw 377, so that the right clamping member 35 and the left clamping member 33 are abutted against each other. At this time, the arc surface of the right clamping member 35 and the wavy section of the left clamping member 33 are embedded together, and the left clamping member 33 is embedded into the interior of the right clamping member 35, so that the left clamping member 33 and the right clamping member 35 are simultaneously located directly below the thread clamping seam 312, and the arc surface of the right clamping member 35 and the wavy section of the left clamping member 33 clamp the yarn and push the yarn to fit on the wavy section of the left clamping member 33, thereby increasing the clamping area of ​​the yarn and improving the stability of the yarn clamping.

[0051] Since the lower part of the yarn is clamped and fixed by the wire clamping plate 372, when the yarn is attached to the wavy section of the left clamping piece 33, the yarn to be detected between the left clamping piece 33, the right clamping piece 35 and the fixed frame 311 is straightened, thereby avoiding the phenomenon that the yarn in the detection section is all bent. Moreover, since the left clamping piece 33 and the right clamping piece 35 are both located directly below the wire clamping seam 312, the lower force point of the stretched yarn is located directly below its upper force point, thereby making the stretched yarn in a vertical state.

[0052] See also Figure 1 , Figure 4 , Figure 7 and Figure 8 The locking mechanism 3 also includes a wire clamping assembly 36 jointly arranged on the right clamping member 35 and the left clamping member 33. The wire clamping assembly 36 includes two left clamping sleeves 361 symmetrically arranged front and back and slidably sleeved on the outer side of the left clamping member 33 along the front-to-back direction, and two right clamping plates 362 symmetrically arranged front and back are slidably arranged on the left curved surface of the vertical section of the right clamping member 35 along the front-to-back direction.

[0053] Continue reading Figure 4 , Figure 7 and Figure 8A second bidirectional screw 363 is rotatably provided at the axial position of the left clamping member 33. The two threaded sections of the second bidirectional screw 363 are respectively threadedly connected with the left jacket 361 at the corresponding positions. An insert plate 364 is fixedly installed on the right side surface of the left jacket 361. A positioning groove 365 for inserting the insert plate 364 is provided on the right clamping plate 362 at a position corresponding to the insert plate 364.

[0054] See also Figure 8 Two limit blocks 366 symmetrically arranged front and back are provided on the right clamping member 35 for sliding along the left and right directions. The limit blocks 366 are used to be inserted into the interior of the positioning groove 365 to lock the initial position of the right clamping plate 362. A coil spring is provided between the limit blocks 366 and the inner wall of the right clamping member 35.

[0055] In the initial state, the coil spring pushes the limit block 366 into the interior of the positioning groove 365 through its own elastic force, thereby locking the right clamping plate 362 and the right clamping member 35 as a whole to prevent the position of the right clamping plate 362 from changing. When the left clamping member 33 and the right clamping member 35 are engaged together, the left clamping member 33 drives the left jacket 361 and the right clamping plate 362 to fit together, so that the left jacket 361 drives the insertion plate 364 to be inserted into the interior of the positioning groove 365, so that the left jacket 361 and the right clamping plate 362 are connected as a whole.

[0056] At the same time, the insertion plate 364 pushes the limit block 366 to exit the interior of the positioning groove 365, so that the right clamping plate 362 can move synchronously with the left jacket 361 at the corresponding position, and then the operator manually rotates the No. 2 bidirectional screw 363, and the No. 2 bidirectional screw 363 drives the two left jackets 361 to approach each other, and the left jacket 361 drives the right clamping plate 362 to move synchronously, so that the left jacket 361 and the right clamping plate 362 clamp the yarn in the front and back directions through their corresponding sides, thereby increasing the clamping direction and further improving the clamping stability.

[0057] See also Figure 1 and Figure 2 The driving mechanism 4 includes a lifting plate 42 that is slidably arranged on the plate frame 1 up and down, an adjusting screw 43 is rotatably arranged at the lower part of the transverse section of the L-shaped plate 2, the adjusting screw 43 is threadedly connected to the lifting plate 42, and an electric push rod 44 is fixedly installed on the plate frame 1, and the telescopic section of the electric push rod 44 is fixedly connected to the bottom of the lifting plate 42.

[0058] Continue reading Figure 1 , Figure 2 , Figure 3 and Figure 4 A pointer 47 is installed in the middle of the left side of the fixed frame 311, and an indicator plate 45 is fixedly installed on the upper front side of the plate frame 1.

[0059] In the initial state, the push springs on the upper and lower sides stabilize the position of the fixed frame 311, so that the fixed frame 311 drives the pointer 47 to point to the position of the indicator plate 45. When the yarn is straightened, the yarn pulls the fixed frame 311 downward and drives the pointer 47 to move to the lower side of the indicator plate 45, and compresses the lower push spring.

[0060] Then the operator manually turns the adjusting screw 43 so that the adjusting screw 43 pushes the L-shaped plate 2 upward, so that the pushing spring at the bottom drives the yarn to move upward through the fixed frame 311. When the fixed frame 311 drives the pointer 47 to point to the position of the indicator plate 45 again, the adjusting screw 43 is stopped. At this time, the pushing springs on the upper and lower sides remain in a naturally extended state, so that the yarn remains vertical and is not subject to external force, thereby preventing the yarn from stretching before detection.

[0061] Afterwards, the telescopic section of the electric push rod 44 is retracted to drive the lifting plate 42 to move downward. The lifting plate 42 pulls the L-shaped plate 2 downward through the adjusting screw 43, so that the L-shaped plate 2 stretches the yarn through the left clamping member 33 and the right clamping member 35, and the elongation length of the yarn is recorded at the same time. Then the operator manually reverses the No. 3 bidirectional screw 377 and manually pulls the two clamping plates 372 away from each other, so that the lower part of the yarn is no longer clamped, thereby allowing the yarn to recover and contract autonomously, and the recovery length of the yarn is recorded. According to the ratio of the yarn recovery length to the elongation length, the elastic recovery rate of the yarn is obtained. If the elastic recovery rate is within the standard range, it indicates that the elasticity of the yarn is qualified, otherwise it is unqualified.

[0062] When the L-shaped plate 2 is pulled downward by the lifting plate 42, the pulling force on the yarn can be gradually increased by the contraction of the push spring on the lower side, thereby preventing the yarn from being suddenly broken due to the pulling force suddenly applied to the yarn.

[0063] See also Figure 1-Figure 8 When testing the elasticity of the yarn, the present invention also includes the following steps: In the first step, the operator puts the upper part of the yarn into the thread clamping seam 312, manually rotates the No. 1 bidirectional screw 314 to drive the two upper clamps 313 to clamp the yarn, and at the same time makes the upper force point of the upper clamp 313 located at the center of the fixed frame 311.

[0064] In the second step, the operator manually pulls the yarn downward and allows the yarn to pass through the V-shaped groove on the right clamping member 35, and the lower part of the yarn is located between the two clamping plates 372. By setting the V-shaped groove, the yarn can be located in the middle of the right clamping member 35.

[0065] In the third step, the operator manually rotates the No. 3 bidirectional screw 377, so that the No. 3 bidirectional screw 377 drives the two clamping plates 372 to move synchronously to the left to the left side of the pointed plate 373, so that the tension spring pulls the two clamping plates 372 to clamp and lock the lower part of the yarn through its own elastic force, and then the clamping plates 372 drive the yarn to move to the left in a pre-straightened state.

[0066] In the fourth step, the right clamping member 35 and the left clamping member 33 are pressed against each other, so that the arc surface of the right clamping member 35 and the wavy cross section of the left clamping member 33 clamp the yarn, and push the yarn to fit on the wavy cross section of the left clamping member 33, and straighten the yarn in a vertical state.

[0067] In the fifth step, the operator then manually rotates the adjusting screw 43 so that the adjusting screw 43 pushes the L-shaped plate 2 upward, so that the lower push spring drives the yarn to move upward through the fixed frame 311. When the fixed frame 311 drives the pointer 47 to point to the position of the indicator plate 45 again, the adjusting screw 43 is stopped from rotating. At this time, the push springs on the upper and lower sides remain in a naturally extended state, so that the yarn remains vertical and is not subject to external forces.

[0068] The sixth step is to retract the telescopic section of the electric push rod 44 to drive the lifting plate 42 to move downward. The lifting plate 42 pulls the L-shaped plate 2 downward through the adjusting screw 43, so that the L-shaped plate 2 stretches the yarn through the left clamping member 33 and the right clamping member 35, and records the elongation length of the yarn. Then the operator manually reverses the No. 3 bidirectional screw 377 and manually pulls the two clamping plates 372 away from each other, so that the lower part of the yarn is no longer clamped, thereby allowing the yarn to recover and contract autonomously, and records the recovery length of the yarn. According to the ratio of the yarn recovery length to the elongation length, the elastic recovery rate of the yarn is obtained. If the elastic recovery rate is within the standard range, it indicates that the elasticity of the yarn is qualified, otherwise it is unqualified.

[0069] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention and they are still covered by the protection scope of the present invention.

Claims

1. A high-quality yarn elasticity testing device, comprising a plate frame, characterized in that: An L-shaped plate is slidably arranged vertically on the plate frame. A locking mechanism for clamping the yarn is jointly arranged on the L-shaped plate and the plate frame, and a driving mechanism for moving the yarn is arranged on the plate frame. The locking mechanism includes an upper clamping assembly arranged at the upper part of the front side of the plate frame for clamping and locking the upper force point of the yarn. A first push plate is slidably arranged in the left part of the front side of the transverse section of the L-shaped plate in the left-right direction. A left clamping piece is fixedly installed on the right side of the first push plate and in front of the transverse section of the L-shaped plate. The left side of the left clamping piece is cylindrical, and the right side of the left clamping piece has a wavy cross section. A second push plate is slidably arranged in the right part of the front side of the transverse section of the L-shaped plate in the left-right direction. A right clamping piece is fixedly installed on the front side of the second push plate. The right clamping piece has a U-shaped structure. The left side surface of the vertical section of the right clamping piece has an arc surface structure corresponding to and fitting with the wavy cross section of the left clamping piece. V-shaped grooves are vertically penetrated through both horizontal sections of the right clamping piece. A wire clamping assembly is jointly arranged on the right clamping piece and the left clamping piece. The locking mechanism further includes an anti-slip assembly for locking the yarn at the lower part of the right clamping piece. The upper clamping assembly includes a fixed frame slidably arranged up and down at the upper part of the front side of the plate frame. Push springs are arranged between the upper and lower sides of the fixed frame and the plate frame.

2. A high-quality yarn elasticity testing device according to claim 1, characterized in that: A wire clamping slot arranged longitudinally and penetrating up and down is formed in the fixed frame. The front end of the wire clamping slot penetrates through the fixed frame, and the rear end of the wire clamping slot is located at the central position of the fixed frame. Two upper clamping plates arranged symmetrically left and right are slidably arranged horizontally in the fixed frame. A first bidirectional screw is rotatably arranged at the rear part of the fixed frame. The two threaded sections of the first bidirectional screw are respectively threadedly connected to the upper clamping plates at the corresponding positions.

3. A high-quality yarn elasticity testing device according to claim 1, characterized in that: The anti-slip assembly includes two connecting plates arranged symmetrically front and rear and slidably arranged in the front-rear direction on the right side of the vertical section of the right clamping piece. An L-shaped wire clamping plate is slidably arranged up and down on the right side of the connecting plates. The horizontal section of the wire clamping plate is located below the right clamping piece. A tension spring is arranged between the connecting plates and the right clamping piece. A third bidirectional screw is rotatably arranged at the rear part of the transverse section of the L-shaped plate. The two threaded sections of the third bidirectional screw are respectively threadedly connected to the first push plate and the second push plate.

4. A high-quality yarn elasticity testing device according to claim 3, characterized in that: The anti-slip assembly further includes a pointed plate fixedly installed at the lower left part of the longitudinal section of the L-shaped plate. A chamfer is formed at the position where the right side of the vertical section of the wire clamping plate is close to the pointed plate.

5. A high-quality yarn elasticity testing device according to claim 3, characterized in that: A moving plate is slidably arranged vertically on the front side of the vertical section of the right clamping piece. A plug rod is fixedly installed at the lower right part of the rear side of the moving plate. The plug rod is slidably inserted and connected in the vertical sections of the two wire clamping plates in the front-rear direction. A track groove is formed in the right part of the front side of the transverse section of the L-shaped plate. The right side of the track groove is a horizontal section, and the left side of the track groove is an inclined section gradually sloping downward. The rear end of the plug rod is slidably connected to the track groove.

6. A high-quality yarn elasticity testing device according to claim 1, characterized in that: The wire clamping assembly includes two left clamping sleeves arranged symmetrically front and rear and slidably sleeved on the outside of the left clamping piece in the front-rear direction. Two right clamping plates arranged symmetrically front and rear are slidably arranged in the front-rear direction on the arc surface of the left side of the vertical section of the right clamping piece.

7. A high-quality yarn elasticity testing device according to claim 6, characterized in that: A second bidirectional screw is rotatably arranged at the axis position of the left clamping piece. The two threaded sections of the second bidirectional screw are respectively threadedly connected to the left clamping sleeves at the corresponding positions. An insertion plate is fixedly installed on the right side surface of the left clamping sleeve. A positioning groove for inserting the insertion plate is formed at the position corresponding to the insertion plate on the right clamping plate.

8. A high-quality yarn elasticity testing device according to claim 6, characterized in that: The right clamp is provided with two limit blocks which are symmetrically arranged front and back and slide along the left and right directions. The limit blocks are used to be inserted into the positioning groove to lock the initial position of the right clamp. A coil spring is provided between the limit blocks and the inner wall of the right clamp.

9. A high-quality yarn elasticity testing device according to claim 1, characterized in that: The driving mechanism includes a lifting plate that is slidably arranged on a plate frame, an adjusting screw is rotatably arranged at the lower part of the transverse section of the L-shaped plate, the adjusting screw is threadedly connected to the lifting plate, an electric push rod is fixedly installed on the plate frame, and the telescopic section of the electric push rod is fixedly connected to the lifting plate.

10. A high-quality yarn elasticity testing device according to claim 1, characterized in that: A pointer is installed on the middle part of the left side of the fixed frame, and an indicator plate is fixedly installed on the upper part of the front side of the plate frame.

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