A device for testing the tensile strength of zipper heads

Abstract

This utility model relates to a zipper pull tensile strength testing device, including a workbench with a frame mounted on it. A pulling component is mounted on the frame, and a tension sensor is mounted at the end of the pulling component. A connecting hook is fixed at the end of the tension sensor. A vertically upward fixed plate is fixed to the upper side of the workbench, and a movable clamping plate that can move back and forth is provided on the upper side of the workbench. After the zipper pull is vertically fixed on the fixed plate, a cylinder drives the tension sensor to pull the zipper pull upward at a uniform speed. During the pulling process, the tension sensor controls the display device to transmit data in real time. When the tension sensor data shows zero, the technician can read the last data before the tension sensor reading reaches zero to determine the maximum tensile force that the zipper pull can withstand, thereby effectively reducing testing errors and improving testing accuracy.

Description

Technical Field

[0001] This utility model relates to zipper heads, and in particular to a device for testing the tensile strength of zipper heads. Background Technology

[0002] A zipper is a reusable connector that allows two pieces of fabric to open and close quickly via a sliding mechanism. It is widely used in clothing, bags, tents, and other industries. A zipper includes a zipper pull, the pull tab of which is prone to damage after repeated pulling. Therefore, to ensure zipper quality and improve user experience, the zipper pull needs to undergo strength testing during the zipper manufacturing process.

[0003] Existing zipper head strength tests require fixing the zipper head, connecting the zipper pull to a tension sensor, and then pulling the zipper pull at a constant speed to test its maximum tensile strength. Because the zipper head is small and irregularly shaped, it cannot be fixed well. During the test, the zipper head is prone to slipping or breaking free, resulting in inaccurate test results. We propose a zipper head tensile strength testing device. Utility Model Content

[0004] This invention proposes a zipper head tensile strength testing device, which solves the above-mentioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows: a zipper head tensile strength testing device includes a workbench, a frame is installed on the workbench, a pulling component is installed on the frame, a tension sensor is installed at the end of the pulling component, and a connecting hook is fixed at the end of the tension sensor.

[0006] The upper side of the workbench is fixed with a vertically upward fixed plate. The upper end of the fixed plate extends upward and then bends laterally. The fixed plate has a slot for accommodating the protruding part of the zipper head. The upper side of the workbench is provided with a movable clamp that can move back and forth.

[0007] A further feature of this invention is that the upper side of the workbench is provided with symmetrical swing grooves on the left and right sides;

[0008] Rotating shafts are fixed on the left and right outer walls of the portal frame, and each rotating shaft is rotatably connected to the swing groove on the same side.

[0009] A further feature of this invention is that two arc-shaped ring plates that can move towards each other are symmetrically arranged on the upper side of the workbench, and a drive mechanism for driving the arc-shaped ring plates is symmetrically installed inside the workbench.

[0010] A further feature of this invention is that the driving mechanism includes two No. 3 cylinders, and the upper side of the worktable is symmetrically provided with sliding grooves. The two arc-shaped ring plates are slidably connected in the sliding grooves on the same side, and the two No. 3 cylinders are respectively installed in the sliding grooves on the same side. Each arc-shaped ring plate is fixed to the piston rod end of the No. 3 cylinder on the same side.

[0011] A further feature of this invention is that: several slots are provided on the curved sidewalls of both arc-shaped ring plates, and each slot is equidistantly distributed on the curved sidewalls of the arc-shaped ring plates on the same side.

[0012] The left and right side walls of the frame are each fixed with a plug rod that can be inserted into the slot.

[0013] A further feature of this invention is that the pulling assembly includes a first cylinder mounted on the portal frame, and the piston rod end of the first cylinder is connected to the tension sensor.

[0014] A further feature of this invention is that a second cylinder for driving the movable clamping plate is installed on the workbench.

[0015] In summary, the beneficial effects of this utility model are as follows:

[0016] When fixing the zipper head, the technician first places the front side of the zipper head against the rear side of the fixing plate, and places the protruding part of the zipper head in the slot. The upper part of the fixing plate is bent backward against the upper edge of the zipper head. Then, the movable clamp is moved forward and pressed against the rear side of the zipper head, thereby effectively fixing the zipper head and preventing it from slipping or coming off during the pulling test.

[0017] After the zipper head is vertically fixed to the fixed plate, the No. 1 cylinder drives the tension sensor, which can pull the zipper head's pull strip upward at a uniform speed. During the pulling process, the tension sensor controls the display device to transmit data in real time. When the tension sensor data shows zero, the technician can read the last data before the tension sensor reading reaches zero to know the maximum tension that the zipper head's pull strip can withstand, thereby effectively reducing test errors and improving test accuracy.

[0018] Technicians can change the angle at which the zipper pull is pulled by swinging the frame back and forth, in order to measure the maximum tensile force that the pull can withstand at different angles, thereby enriching the test data and making the test results more accurate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 2 This is a front view schematic diagram of the internal structure of this utility model.

[0022] The following are labeled in the diagram: 11. Workbench; 12. Gate frame; 13. Tension sensor; 14. Fixed plate; 15. Movable clamping plate; 17. Swing groove; 18. Rotating shaft; 19. Arc-shaped ring plate; 21. Cylinder No. 3; 22. Sliding groove; 23. Slot; 24. Cylinder No. 1; 25. Connecting hook; 26. Cylinder No. 2; 27. Insert rod; 28. Empty slot. Detailed Implementation

[0023] The following will refer to the appendix in the embodiments of this utility model. Figure 1-2 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example:

[0025] like Figures 1 to 2 As shown, a zipper head tensile strength testing device includes a workbench 11, a frame 12 mounted on the workbench 11, a cylinder 24 mounted on the frame 12, a tension sensor 13 electrically connected to a control and display device (not shown in the figure) at the piston rod end of the cylinder 24, and a connecting hook 25 fixed at the end of the tension sensor 13, the tension sensor 13 being connected to the zipper head to be tested through the connecting hook 25.

[0026] A vertically upward fixing plate 14 is fixed to the upper side of the workbench 11. The upper end of the fixing plate 14 extends upward and then bends laterally backward. A slot 28 is provided in the fixing plate 14 to accommodate the protruding part of the zipper head. When the technician fixes the zipper head, the smooth sidewall of the zipper head abuts against the rear side of the fixing plate 14, and the upper side of the bent fixing plate 14 abuts against the upper edge of the zipper head, thereby initially fixing the position of the zipper head and making the zipper head vertically upward toward the tension sensor 13.

[0027] A second cylinder 26 is installed on the upper side of the workbench 11. A movable clamping plate 15 that can move back and forth is fixed at the end of the second cylinder 26. When the zipper head is fixed on the fixed plate 14, the movable clamping plate 15 moves forward under the drive of the second cylinder 26 and presses against the rear side of the zipper head to achieve the purpose of fixing the zipper head.

[0028] After securing the zipper head, the technician hangs the zipper pull on the connecting hook 25 and causes the first cylinder 24 to pull the connecting hook 25 upwards at a constant speed, thereby continuously pulling the zipper pull upwards. During the pulling process, the tension sensor 13 records the tension force on the zipper head and transmits the data to the control display device. When the reading of the tension sensor 13 returns to zero during the test, it indicates that the zipper pull has reached its limit and is damaged. The technician can then use the control display device to find the reading of the tension sensor 13 before it returned to zero, thus determining the maximum tension that the zipper pull can withstand and judging whether the tensile strength of the zipper head is up to standard.

[0029] The maximum tensile force that the zipper pull can withstand will be different when the zipper head is pulled at different angles. In order to measure the strength of the zipper head at different pulling angles, Embodiment 2 is proposed here: The upper side of the workbench 11 is symmetrically provided with swing grooves 17, and the left and right outer walls of the frame 12 are fixed with rotating shafts 18. Each of the rotating shafts 18 is rotatably connected to the swing grooves 17 on the same side, so that the frame 12 can swing back and forth, and the first cylinder 24 can pull the pull strap on the zipper head at different angles.

[0030] Based on Embodiment 2, Embodiment 3 is proposed: Two sliding grooves 22 are symmetrically opened on the upper side of the workbench 11. Each sliding groove 22 is equipped with a No. 3 cylinder 21. The piston rod end of each No. 3 cylinder 21 is fixed with an arc-shaped ring plate 19 that can slide left and right and connect to the sliding groove 22 on the same side. Several slots 23 are opened on the curved sidewalls of the two arc-shaped ring plates 19. Each slot 23 is equidistantly distributed on the curved sidewalls of the arc-shaped ring plates 19 on the same side. Insert rods 27 that can be inserted into the slots 23 are fixed on the left and right sidewalls of the frame 12.

[0031] After securing the zipper head, the technician swings the bracket 12 back and forth to the desired pulling angle. Then, driven by the third cylinder 21, the two arc-shaped ring plates 19 move towards each other, causing the insertion rods 27 to be inserted into the corresponding slots 23 on the same side of the arc-shaped ring plates 19. This achieves the purpose of fixing the bracket 12, maintaining its tilt at the desired pulling angle, and as... Figure 1 As shown, a scale is provided on the arc-shaped ring plate 19. After the portal frame 12 is fixed, technicians can read the numbers on the scale to know the specific value of the pulling angle.

[0032] After completing the above operations, the technicians connect the zipper pull to the connecting hook 25 and repeat the test procedure in Example 1 to measure the maximum tensile force that the zipper pull can withstand at different pulling angles.

[0033] It should be noted that by increasing the number of slots 23, the tension sensor 13 on the frame 12 can measure the maximum tension that the zipper pull can withstand at more angles, thereby enriching the test data and making the test results more accurate.

[0034] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A zipper pull tensile strength testing device, comprising a worktable (11), characterized in that: A portal frame (12) is installed on the workbench (11), a pulling assembly is installed on the portal frame (12), a tension sensor (13) is installed at the end of the pulling assembly, and a connecting hook (25) is fixed at the end of the tension sensor (13). The upper side of the workbench (11) is fixed with a vertically upward fixed plate (14). The upper end of the fixed plate (14) extends upward and then bends laterally. A slot (28) is opened in the fixed plate (14). A movable clamping plate (15) that can move back and forth is provided on the upper side of the workbench (11).

2. The zipper pull tensile strength testing device according to claim 1, characterized in that: The upper side of the workbench (11) is symmetrically provided with swing grooves (17). Rotating shafts (18) are fixed on the left and right outer walls of the portal frame (12), and each of the rotating shafts (18) is rotatably connected to the swing groove (17) on the same side.

3. The zipper pull tensile strength testing device according to claim 2, characterized in that: The upper side of the workbench (11) is symmetrically provided with two arc-shaped ring plates (19) that can move towards each other. The workbench (11) is symmetrically provided with a drive mechanism for driving the arc-shaped ring plates (19).

4. The zipper pull tensile strength testing device according to claim 3, characterized in that: The drive mechanism includes two No. 3 cylinders (21). The upper side of the worktable (11) is symmetrically provided with sliding grooves (22). The two arc-shaped ring plates (19) are slidably connected in the sliding grooves (22) on the same side. The two No. 3 cylinders (21) are respectively installed in the sliding grooves (22) on the same side. Each arc-shaped ring plate (19) is fixed on the piston rod end of the No. 3 cylinder (21) on the same side.

5. The zipper pull tensile strength testing device according to claim 3, characterized in that: Both of the arc-shaped ring plates (19) have a number of slots (23) on their curved sidewalls. Each of the slots (23) is equidistantly distributed in a circle on the curved sidewall of the arc-shaped ring plate (19) on the same side. The left and right side walls of the portal frame (12) are each fixed with a plug (27) that can be inserted into the slot (23).

6. The zipper pull tensile strength testing device according to claim 1, characterized in that: The pulling assembly includes a first cylinder (24) mounted on the portal frame (12), and the piston rod end of the first cylinder (24) is connected to the tension sensor (13).

7. The zipper pull tensile strength testing device according to claim 1, characterized in that: The workbench (11) is equipped with a second cylinder (26) for driving the movable clamp (15).

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