Full-automatic single yarn strength tester

Abstract

The invention discloses a full-automatic single-yarn strength tester, and relates to the technical field of yarn strength testing. Comprising a cabinet body, a yarn locking device, a controller, a winding roller and a third driving piece, the third driving piece drives the winding roller to wind or unwind, during testing, a yarn to be measured is wound on the winding roller, then one side of the yarn is fixed through the yarn locking device, a plurality of connecting shafts which are distributed at equal intervals are movably connected in the length direction of the cabinet body, and the connecting shafts are connected with the controller. Supporting rollers are fixed to the ends of the connecting shafts. The device is provided with a plurality of supporting rollers, a top through groove, a bottom through groove, a yarn clamping device and a pushing assembly, a single to-be-tested yarn can be vertically divided into six to-be-tested yarns, simultaneous testing of the six to-be-tested yarns is achieved, manpower is effectively reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of yarn strength testing, in particular to a full-automatic single yarn strength tester. Background Art

[0002] The breaking strength of single yarns and pure or blended yarns of cotton, wool, linen, silk, chemical fiber, and core-spun yarn is an important material performance parameter. When conducting this strength test, a tensile instrument is generally used to fix one end of the single yarn and stretch the other end at a specified speed until it breaks. The breaking strength is recorded during the test.

[0003] A Chinese utility model patent, with authorization publication number CN206378370U, discloses an electronic single yarn strength meter, comprising a cabinet and a control system. The cabinet is provided with an internal support column, a slide rail is fixed on the internal support column, a slidable slider is provided on the slide rail, a lower clamping mechanism is fixedly mounted on the slider, and an upper clamping mechanism fixed to the internal support column is provided above the slide rail. The strength meter has a simple structure and is easy to use. It can quickly and accurately test the breaking strength and elongation of single yarns and pure or blended yarns of various cotton, wool, linen, silk, chemical fibers, and core-spun yarns.

[0004] For example, Chinese utility model patent, authorization publication number CN221302956U, discloses an electronic single yarn strength meter for textile production. The meter comprises a body, a base fixedly connected to the lower surface of the body, a display fixedly connected to the upper surface of the base, a test wire rod fixedly connected to the upper surface of the base, and an auxiliary wire rod fixedly connected to one side of the body. This electronic single yarn strength meter for textile production has the advantages of allowing the user to place a test wire between a clamping plate and a screw plate and clamp the wire by rotating the screw. The clamping speed is fast, the clamping stability is high, and the clamping device can also clamp test wires of different thicknesses.

[0005] The above solution solves the technical problems raised in the background technology. However, in practical applications, the existing technology still has certain defects, such as: When testing the strength of a single yarn, it is generally necessary to test the same type of yarn more than three times, and then calculate the average value of the yarn tension when the yarn breaks. However, the existing single yarn strength tester can generally only perform one test at a time, which has low work efficiency. In addition, existing single yarn strength testers generally fix the yarn manually. Since the staff fix the yarn with different strength each time, the yarn tension in each test varies greatly, thereby reducing the accuracy of the test. Summary of the Invention

[0006] The purpose of the present invention is to provide a fully automatic single yarn strength tester to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a fully automatic single yarn strength tester, comprising a cabinet, a thread locker, a controller, a winding roller and a third driving member, wherein the winding roller is driven by the third driving member to wind or unwind, and during testing, the yarn to be measured is wound around the winding roller, and then one side of the yarn is fixed by the thread locker, and a plurality of equally distributed connecting shafts are movably connected along the length direction of the cabinet, a supporting roller is fixed to the end of the connecting shaft, and a first yarn groove is provided on the outer side of the supporting roller, and a plurality of equally distributed top through slots are provided on the front of the cabinet, and the top through slots are distributed between two adjacent connecting shafts; A plurality of bottom through slots are opened at the bottom of the cabinet, and a plurality of yarn clamps are provided at the top and bottom of the cabinet. The bottom yarn clamp is movably arranged in the bottom through slot, and the bottom yarn clamp is driven to move along the bottom through slot by a first driving member. A plurality of force sensors are fixed on the top of the cabinet, and the top yarn clamp is fixed to the force sensor. A pushing component is movably arranged in the top through slot, and the pushing component is driven by the second driving member to move along the top through slot.

[0008] Furthermore, the top through slot is located on the top of the supporting roller, and after the pushing component passes through the gap formed by two adjacent connecting shafts, the pushing component is located on the top of the supporting roller.

[0009] Furthermore, the yarn clamp includes a U-shaped clamping block, a clamping plate is provided on the inner side of the U-shaped clamping block, a plurality of first springs are fixed between the clamping plate and the side wall of the U-shaped clamping block, a first magnetic conductive block is fixed on one side of the clamping plate, and the first magnetic conductive block is movably connected to the U-shaped clamping block; An electromagnet is fixed on one side of the U-shaped clamping block. When the electromagnet is energized and magnetized, the first magnetic conductive block is attracted to the electromagnet.

[0010] Furthermore, friction plates are fixed to one side of the clamping plate and the side of the U-shaped clamping block facing the clamping plate.

[0011] Furthermore, a rod is movably connected to the top of the U-shaped clamping block, and a socket is provided on the top of the first magnetic conductive block, and the socket is adapted to the rod; An oblique fixing plate is fixed to the top of the insertion rod, a second spring is fixed between the oblique fixing plate and the U-shaped clamping block, a second magnetic block is arranged between the U-shaped clamping block and the electromagnet, a plurality of plug shafts movably plugged with the U-shaped clamping block are fixed to the side of the second magnetic block, a plurality of third springs are fixed between the second magnetic block and the U-shaped clamping block, and an oblique push plate is fixed to the side of the second magnetic block facing the oblique fixing plate. When the oblique push plate moves to the right, it pushes the oblique fixing plate, thereby driving the insertion rod to move upward.

[0012] Furthermore, the pushing assembly includes a support rod, the end of the support rod is movably connected to a pushing roller, and a second yarn groove is opened on the outer side of the pushing roller; At least two rings are fixed on the rod body of the support rod, and movable blocks are movably inserted on both sides of the top of the ring. The ends of the movable blocks are movably connected to the pressing rollers, and the outer side of the pressing rollers is provided with a third yarn groove; A middle block is fixed on the top of one of the rings, and a fourth spring is fixed between the movable block on one side and the middle block.

[0013] Furthermore, side baffles are provided on the outer sides of the two vertical yarn clamps, the side baffles are located directly below the supporting roller, and the side surfaces of the side baffles are on the same horizontal line as the inner side surfaces of the first yarn grooves of the supporting rollers.

[0014] Furthermore, the top and bottom of the side baffle are both provided with curved plates.

[0015] Furthermore, a tension detector is fixed on the side baffle close to the side of the thread locker.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The fully automatic single yarn strength tester is equipped with several supporting rollers, a top through slot, a bottom through slot, a yarn clamp and a pushing assembly. It can vertically divide a single yarn to be tested into six yarns to be tested, thereby realizing simultaneous testing of the six yarns to be tested, effectively reducing manpower and improving work efficiency.

[0017] At the same time, when the yarn to be tested meets the detection conditions, the controller controls the third driving member to stop working, and under the reset force of the fourth spring, it can ensure that the yarn to be tested between the two vertical side baffles is in a vertical state. At this time, the electromagnet is energized, and the two friction plates of each upper and lower yarn clamps the yarn to be tested tightly and fixed. Finally, the bottom yarn clamp is driven downward by the first driving member to realize a strong test of the yarn to be tested. The device does not require manual hanging of the yarn, reduces the difference in yarn tension, and improves the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A top view of the present invention; Figure 3 It is the front view of the present invention; Figure 4 A half-section view of the present invention; Figure 5 A detailed view of the driving assembly of the present invention; Figure 6This is a schematic diagram of the connection between the yarn clamp and the force sensor of the present invention; Figure 7 An axial view of the yarn clamp of the present invention; Figure 8 This is a schematic diagram of the positions of the support rollers and side baffles after cross-sectioning of the present invention.

[0019] In the figure: 1, cabinet; 101, top slot; 102, bottom slot; 103, controller; 2, thread locker; 3, take-up roller; 4, support roller; 401, connecting shaft; 5, side baffle; 501, bending plate; 6, yarn clamp; 601, U-shaped clamping block; 602, clamping plate; 603, first magnetic block; 604, first spring; 605, friction plate; 606, jack; 607, plug rod; 608, second spring; 609, oblique fixing plate; 6 10. Electromagnet; 611. Second magnetic conductive block; 612. Insert shaft; 613. Third spring; 614. Oblique push plate; 7. Pushing assembly; 701. Pushing roller; 702. Second yarn groove; 703. Support rod; 704. Ring; 705. Movable block; 706. Pressing roller; 707. Third yarn groove; 708. Intermediate block; 709. Fourth spring; 8. Tension detector; 9. Force sensor; 10. First driving member; 11. Second driving member. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1-8 As shown, the present invention provides a technical solution: a fully automatic single yarn strength tester, comprising a cabinet 1, a thread locker 2, a controller 103, a winding roller 3 and a third driving member. During the test, the yarn to be measured is wound around the winding roller 3, and then one end of the yarn is fixed by the thread locker 2, and the winding roller 3 is driven by the third driving member to reel in or unreel. The third driving member can be a driving mechanism composed of a worm gear, a worm and a motor. Due to its self-locking performance, it can prevent the yarn to be tested from rotating disorderly during the test. The thread locker 2 is a mature existing technology and can be purchased on the market.

[0022] like Figure 2As shown, a number of equally spaced connecting shafts 401 are movably connected along the length direction of the cabinet 1. A support roller 4 is fixed at the end of the connecting shaft 401, and a first yarn groove is opened on the outer side of the support roller 4. The installation height of all the connecting shafts 401 is the same. It can be seen that when the existing technology performs strength testing on a single yarn, in order to improve the accuracy of the measurement, the same type of yarn generally needs to be tested more than three times. In this solution, as an example, the number of connecting shafts 401 is set to four. When the yarn to be tested is connected, the yarn to be tested is wound on the winding roller 3 and fixed by the thread locker 2. The yarn to be tested contacts the bottom surface of the first yarn groove. Three equally spaced top through slots 101 are opened on the front of the cabinet 1, and the top through slots 101 are distributed between two adjacent connecting shafts 401. Since there are four support rollers 4, in order to vertically divide the yarn to be tested into six yarns to be tested during the test, six bottom through slots 102 are opened on the bottom of the cabinet 1 corresponding to the top through slots 101.

[0023] Six groups of yarn clamps 6 are arranged on the front of the cabinet 1, each group of yarn clamps 6 consists of two and are distributed up and down, and the end faces of the clamping ends of the upper and lower yarn clamps 6 are located in the same horizontal plane, and six force sensors 9 are fixed on the top of the cabinet 1. The top yarn clamp 6 is fixed to the force sensor 9, and the bottom yarn clamp 6 is movably arranged in the bottom through groove 102. In order to perform strength testing on the six yarns to be tested, the bottom yarn clamp 6 is driven by the first driving member 10 to move along the bottom through groove 102. It can be understood that since the stretching amount and strength value of each yarn to be tested may be different, each yarn clamp 6 is equipped with a first driving member 10. In this solution, the first driving member 10 is an electric telescopic rod.

[0024] A pushing assembly 7 is movably arranged in the top through slot 101, and the width of the pushing assembly 7 is smaller than the gap formed by the two connecting shafts 401. In this way, the pushing assembly 7 can pass through the gap formed by the two connecting shafts 401 when moving up and down, and the pushing assembly 7 is driven by the second driving member 11 to move along the top through slot 101. In order to achieve rapid line separation and fixation of the yarn to be tested, as a preferred method, all the pushing assemblies 7 are connected together, and all the pushing assemblies 7 are driven to move synchronously by the second driving member 11. In this solution, the second driving member 11 can be a driving structure composed of a screw and a motor.

[0025] If the pushing assembly 7 is located at the bottom of the supporting roller 4, when the yarn to be tested is installed, the yarn to be tested needs to pass through the supporting roller 4 and the pushing assembly 7 multiple times, thereby increasing manpower and reducing work efficiency. In this solution, Figure 1 and Figure 2As shown, the top through slot 101 is located at the top of the supporting roller 4. When the pushing component 7 passes through the gap formed by the two adjacent connecting shafts 401 and is located at the top of the top through slot 101, the pushing component 7 is located at the top of the supporting roller 4. When installing the yarn to be measured, the yarn to be measured is wound around the winding roller 3, and then one end of the yarn is fixed by the thread locker 2.

[0026] like Figure 6 and Figure 7 As shown, the yarn clamper 6 includes a U-shaped clamping block 601, a clamping plate 602 is arranged on the inner side of the U-shaped clamping block 601, and several first springs 604 are fixed between the clamping plate 602 and the side wall of the U-shaped clamping block 601, and a first magnetic conductive block 603 is fixed on one side of the clamping plate 602, and the first magnetic conductive block 603 is movably connected to the U-shaped clamping block 601, and an electromagnet 610 is fixed on one side of the U-shaped clamping block 601. When the electromagnet 610 is energized and magnetized, the first magnetic conductive block 603 and the electromagnet 610 are attracted to each other, thereby achieving the clamping of the yarn to be tested by the clamping plate 602. During operation, in order to prevent the yarn to be tested from sliding due to too little friction between the yarn to be tested and the clamping plate 602, friction plates 605 are fixed on one side of the clamping plate 602 and the side of the U-shaped clamping block 601 facing the clamping plate 602. In this solution, the friction plate 605 is made of rubber material and has anti-slip grooves on the surface.

[0027] In addition, in order to prevent the yarn to be tested from exerting a reverse force on the clamping plate 602 that is greater than the attraction between the first magnetic conductive block 603 and the electromagnet 610 due to the high tensile strength of the yarn to be tested during the stretching process, thereby causing the first magnetic conductive block 603 and the electromagnet 610 to lose contact, in this solution, Figure 7 As shown, a rod 607 is movably inserted at the top of the U-shaped clamp 601, and a socket 606 is opened at the top of the first magnetic block 603, and the socket 606 is adapted to the rod 607. An inclined fixing plate 609 with an upward slope is fixed at the top of the rod 607. A second spring 608 is fixed between the inclined fixing plate 609 and the U-shaped clamp 601. A second magnetic conductive block 611 is provided between the U-shaped clamp 601 and the electromagnet 610. After the electromagnet 610 is energized and magnetized, the second magnetic conductive block 611 is also attracted to the electromagnet 610. Two plug shafts 612 that are movably inserted with the U-shaped clamp 601 are fixed on the side of the second magnetic conductive block 611. Two third springs 613 are fixed between the second magnetic conductive block 611 and the U-shaped clamp 601, and the plug shaft 612 is located in the spiral of the third spring 613. An inclined push plate 614 with a downward slope is fixed on the side of the second magnetic conductive block 611 facing the inclined fixing plate 609. Figure 7 As shown, when the oblique push plate 614 moves to the right, it pushes the oblique fixed plate 609, driving the insertion rod 607 to move upward.

[0028] Specifically, when the yarn to be tested needs to be fixed, the controller 103 controls the electromagnet 610 to be energized, and the first magnetic block 603 drives the clamping plate 602 to move toward the side of the electromagnet 610, thereby clamping and fixing the yarn to be tested through the two friction plates 605. At this time, the second magnetic block 611 drives the oblique push plate 614 to move toward the side of the electromagnet 610, and the oblique push plate 614 is disengaged from the oblique fixing plate 609. Under the elastic force of the second spring 608, the rod 607 is inserted into the socket 606 to fix the first magnetic block 603 and the clamping plate 602, thereby preventing the yarn to be tested from exerting a reverse force on the clamping plate 602 that is greater than the second spring 608. The attraction between a magnetic block 603 and the electromagnet 610 causes the first magnetic block 603 and the electromagnet 610 to lose contact. After the test is completed, the controller 103 controls the electromagnet 610 to cut off the power. Under the reset force of the third spring 613, the oblique push plate 614 pushes the oblique fixed plate 609, and the insertion rod 607 moves upward, so that the insertion rod 607 is disengaged from the socket 606, and finally the splint 602 is reset under the elastic force of the first spring 604. It can be understood that in order to achieve the above technical purpose, those skilled in the art can determine the elastic force of the first spring 604, the second spring 608 and the third spring 613 through a limited number of experiments or calculations.

[0029] like Figure 1 、 Figure 3 and Figure 5 As shown, the pushing assembly 7 includes a support rod 703, the end of the support rod 703 is movably connected to a pushing roller 701, a second yarn groove 702 is provided on the outer side of the pushing roller 701, and two circular rings 704 are fixed on the rod body of the support rod 703, movable blocks 705 are movably inserted on both sides of the top of the circular ring 704, and a pressure roller 706 is movably connected to the end of the movable block 705, and a third yarn groove 707 is provided on the outer side of the pressure roller 706. In order to enable the two movable blocks 705 to be symmetrically arranged on the top of the circular ring 704, an intermediate block 708 is fixed to the top of one of the circular rings 704, and a fourth spring 709 is fixed between the movable block 705 on one side and the intermediate block 708. In the initial state, the two pressure rollers 706 are in a state of opening to both sides.

[0030] It should be noted that, in order to reduce the friction between the yarn to be detected and the roller, in this solution, the supporting roller 4, the pushing roller 701 and the pressing roller 706 are all made of metal materials, and the metal materials can be copper or stainless steel. Therefore, the friction between the yarn to be detected and the roller can be ignored. In order to make the yarn to be detected in a vertical state, such as Figure 1 and Figure 3 As shown, the outer sides of the two vertical yarn clamps 6 are provided with side baffles 5, which are located just below the support roller 4. To facilitate the passage of the push assembly 7, curved plates 501 are provided at the top and bottom of the side baffles 5. Figure 8As shown, the side surface of the side baffle 5 and the inner side surface of the first yarn groove of the supporting roller 4 are located on the same horizontal line L1. In order to detect whether the yarn to be detected meets the detection conditions, a tension detector 8 is fixed on the side baffle 5 close to the side of the thread locker 2, wherein the tension detector 8 can also be a pressure sensor fixed on the side of the side baffle 5. When the tension detector 8 detects that the tension of the yarn to be detected reaches the set value, each set of two vertical yarn clamps 6 is used to fix both sides of each yarn to be detected.

[0031] Working principle: Before the device starts working, the yarn to be tested is wound around the winding roller 3 and one end of it is fixed by the thread locker 2. The controller 103 controls the third driving member to drive the winding roller 3 to unwind, and the second driving member 11 drives the pushing assembly 7 to move downward. When the pushing assembly 7 is located below the bottom side baffle 5 and the pressing roller 706 contacts the curved plate 501 at the bottom of the bottom side baffle 5, the controller 103 controls the third driving member to drive the winding roller 3 to rewind, and the tension detector 8 detects the tension of the yarn to be tested in real time. Once the tension reaches the set value, it means that the yarn to be tested meets the testing conditions. At this time, the controller 103 controls the third driving member to stop working, and under the reset force of the fourth spring 709, it can ensure that the yarn to be tested between the two vertical side baffles 5 is in a vertical state. At this time, the electromagnet 610 is energized, and the two friction plates 605 of each upper and lower yarn clamp 6 tightly clamp the yarn to be tested. Finally, the first driving member 10 drives the bottom yarn clamp 6 to move downward to achieve a strong test of the yarn to be tested.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is limited by the accompanying embodiments and their equivalents.

Claims

1. A fully automatic single yarn strength tester, comprising a cabinet (1), a thread locker (2), a controller (103), a winding roller (3) and a third driving member, wherein the winding roller (3) is driven by the third driving member to wind or unwind, and during testing, the yarn to be measured is wound around the winding roller (3), and then one side of the yarn is fixed by the thread locker (2), characterized in that: A plurality of equally spaced connecting shafts (401) are movably connected along the length direction of the cabinet body (1), a supporting roller (4) is fixed to the end of the connecting shaft (401), a first yarn groove is provided on the outer side of the supporting roller (4), and a plurality of equally spaced top through slots (101) are provided on the front side of the cabinet body (1), and the top through slots (101) are distributed between two adjacent connecting shafts (401); A plurality of bottom through slots (102) are provided at the bottom of the cabinet (1), and a plurality of yarn clamps (6) are provided at the top and bottom of the cabinet (1). The bottom yarn clamps (6) are movably arranged in the bottom through slots (102), and the bottom yarn clamps (6) are driven to move along the bottom through slots (102) by a first driving member (10). A plurality of force sensors (9) are fixed at the top of the cabinet (1), and the top yarn clamps (6) are fixed to the force sensors (9); A pushing assembly (7) is movably provided in the top through slot (101), and the pushing assembly (7) is driven by the second driving member (11) to move along the top through slot (101).

2. The fully automatic single yarn strength tester according to claim 1, characterized in that: The top through slot (101) is located on the top of the supporting roller (4), and after the pushing component (7) passes through the gap formed by two adjacent connecting shafts (401), the pushing component (7) is located on the top of the supporting roller (4).

3. The fully automatic single yarn strength tester according to claim 1, characterized in that: The yarn clamp (6) includes a U-shaped clamp (601), a clamp (602) is provided on the inner side of the U-shaped clamp (601), a plurality of first springs (604) are fixed between the clamp (602) and the side wall of the U-shaped clamp (601), a first magnetic conductive block (603) is fixed on one side of the clamp (602), and the first magnetic conductive block (603) is movably connected to the U-shaped clamp (601); An electromagnet (610) is fixed to one side of the U-shaped clamping block (601). When the electromagnet (610) is energized and magnetized, the first magnetic conductive block (603) and the electromagnet (610) are attracted to each other.

4. The fully automatic single yarn strength tester according to claim 3, characterized in that: A friction plate (605) is fixed to one side of the clamping plate (602) and to the side of the U-shaped clamping block (601) facing the clamping plate (602).

5. The fully automatic single yarn strength tester according to claim 3, characterized in that: The top of the U-shaped clamping block (601) is movably connected with an insertion rod (607), and the top of the first magnetic conductive block (603) is provided with a socket (606), and the socket (606) is adapted to the insertion rod (607); An oblique fixing plate (609) is fixed to the top of the insertion rod (607), a second spring (608) is fixed between the oblique fixing plate (609) and the U-shaped clamping block (601), a second magnetic conductive block (611) is provided between the U-shaped clamping block (601) and the electromagnet (610), a plurality of plug shafts (612) movably plugged with the U-shaped clamping block (601) are fixed to the side of the second magnetic conductive block (611), a plurality of third springs (613) are fixed between the second magnetic conductive block (611) and the U-shaped clamping block (601), an oblique push plate (614) is fixed to the side of the second magnetic conductive block (611) facing the oblique fixing plate (609), and when the oblique push plate (614) moves to the right, it pushes the oblique fixing plate (609), thereby driving the insertion rod (607) to move upward.

6. The fully automatic single yarn strength tester according to claim 1, characterized in that: The pushing assembly (7) comprises a support rod (703), the end of the support rod (703) is movably connected to a pushing roller (701), and a second yarn groove (702) is provided on the outer side of the pushing roller (701); At least two rings (704) are fixed on the rod body of the support rod (703), and movable blocks (705) are movably connected to both sides of the top of the ring (704), and the ends of the movable blocks (705) are movably connected to the pressing roller (706), and the outer side of the pressing roller (706) is provided with a third yarn groove (707); A middle block (708) is fixed to the top of one of the circular rings (704), and a fourth spring (709) is fixed between the movable block (705) on one side and the middle block (708).

7. The fully automatic single yarn strength tester according to claim 1, characterized in that: Side baffles (5) are provided on the outsides of the two vertical yarn clamps (6), the side baffles (5) are located directly below the support roller (4), and the side surfaces of the side baffles (5) and the inner side surfaces of the first yarn grooves of the support roller (4) are located on the same horizontal line.

8. The fully automatic single yarn strength tester according to claim 7, characterized in that: The top and bottom of the side baffle (5) are both provided with curved plates (501).

9. The fully automatic single yarn strength tester according to claim 7, characterized in that: A tension detector (8) is fixed on the side baffle (5) close to the side of the thread locker (2).

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