Tool for testing peel strength of magic tape

Abstract

The utility model relates to the technical field of testing tools, and discloses a tool for testing the peel strength of a magic tape, which comprises a peeling fixed panel, two symmetrically distributed linear modules are fixedly arranged on the upper surface of the peeling fixed panel, and a stepping motor for driving the linear modules to do linear motion is arranged at the end part of each linear module. Symmetrically-distributed adapter plates are installed on the upper surfaces of the two linear module moving parts through bolts. The two ends of the hook-and-loop fastener are clamped and fixed through the two fixing units, the two linear modules are driven by the two stepping motors respectively, the two adapter plates drive the two fixing units to drive the two ends of the hook-and-loop fastener to be away from each other, and then the adhered hook-and-loop fastener is separated. The single-axis force sensor located between one adapter plate and one fixing unit measures the tensile force of the peel strength of the hook-and-loop fastener, the overall structure is simple, use is convenient, the occupied area is small, the manufacturing cost is low, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing tools, in particular to a tool for testing the peeling strength of a hook and loop fastener. Background Art

[0002] Velcro fasteners are widely used in products such as transportation vehicles, sports equipment, medical equipment, travel bags, clothing decoration, sanitary ware, health care equipment, etc., and are developing rapidly and have a huge industrial chain. It has male and female sides, one side is the male side with soft fibers, and the other side is the female side with hook-barbed elastic fibers. The male and female sides are interlocked, and when subjected to a certain lateral force, the elastic hook is straightened, loosened from the velvet loop and opened, and then the original hook shape is restored, and it can be opened and closed repeatedly. During the Velcro production process, the peel strength of the Velcro needs to be tested to ensure that it meets the standards.

[0003] Currently, there is no systematic test fixture for testing the peeling strength of Velcro on the market. CRE type tensile testing machine is generally used with homemade fixture for testing. CRE type tensile testing machine needs to be used with a fixture to fix the Velcro. At the same time, the Velcro needs to be fixed to a certain extent. One end holds the loop tape and the other end holds the hook tape. The tensile machine is used to uniformly stretch and record the tension, and then the Velcro peeling strength is calculated. CRE type tensile testing machine is generally expensive and occupies a large space. In addition, additional fixtures and fixtures need to be made to fix the Velcro. The structure is complex, the installation is inconvenient, and it is relatively cumbersome. Therefore, a Velcro peeling strength test fixture is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hook and loop fastener peeling strength testing tool, which is convenient for testing the peeling strength of the hook and loop fastener.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a Velcro peeling strength testing tool, comprising a peeling and fixing panel, two symmetrically distributed linear modules are fixedly installed on the upper surface of the peeling and fixing panel, and stepper motors for driving the linear modules to perform linear motion are installed at the ends of the linear modules, and symmetrically distributed adapter plates are installed on the upper surfaces of the moving parts of the two linear modules through bolts, and the adjacent surfaces of the two adapter plates are installed with fixing units, and the fixing units include fixed blocks and movable blocks, one of the fixed blocks is installed with a side wall of one of the adapter plates through bolts, and a uniaxial force sensor is installed on the side wall of the other fixed block, and the uniaxial force sensor is installed with the side wall of the other adapter plate through bolts, and locking bolts are penetrated on the upper surfaces of the two fixed blocks, and the lower ends of the locking bolts pass through the movable block and are threadedly connected with a nut, and the locking bolts are slidably connected to the fixed block and the movable block, and a clamping frame for limiting the Velcro is installed in the middle of the upper surface of the peeling and fixing panel, and a tensioning unit for tightening the locking bolt is installed on the upper surface of the fixed block.

[0006] Preferably, there are two locking bolts passing through the fixing block, and the two locking bolts are symmetrically distributed on the fixing block.

[0007] Preferably, the clamping frame includes a bracket installed on the upper surface of the stripping fixing panel by bolts, a first clamping plate is installed on one side of the bracket by bolts, and a second clamping plate is installed on the other side of the first clamping plate by bolts, and adjacent surfaces of the first clamping plate and the second clamping plate are provided with slots.

[0008] Preferably, an oblique chamfer is provided at the upper end of the slot, and the length of the slot is equal to the length of the first clamping plate and the second clamping plate.

[0009] Preferably, the tensioning unit includes a fixing frame fixedly mounted on the upper surface of the fixing block, a pull rod is passed through the middle of the upper surface of the fixing frame, the pull rod is slidably connected to the fixing frame, a pull plate is installed at the lower end of the pull rod, two locking bolts both penetrate the pull plate, the pull plate is slidably connected to the outer wall of the locking bolt, the screwing head of the locking bolt blocks the pull plate, the upper end of the pull rod is fixedly connected to an axle rod, the outer wall of the axle rod is rotatably connected to an eccentric pressing handle, the upper surface of the fixing frame is rotatably connected to a fixing ring, the upper surface of the fixing ring is fixedly connected to a rubber extrusion arc block, the pull rod penetrates the fixing ring and the rubber extrusion arc block, the pull rod is slidably connected to the inner wall of the fixing ring and the rubber extrusion arc block, and the eccentric pressing handle is against the arc surface of the rubber extrusion arc block.

[0010] Preferably, the lower end of the pull rod passes through the pull plate, and the pull rod is threadedly connected to the pull plate.

[0011] Preferably, the side wall of the fixed block is an L-shaped structure, one end of the uniaxial force sensor is fixedly mounted to the middle of the side wall of one of the fixed blocks, and the middle of the side wall of the other fixed block is mounted to the side wall of one of the adapter plates via bolts.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model clamps and fixes the two ends of the Velcro through two fixing units, and uses two stepping motors to drive two linear modules respectively, so that the two adapter plates drive the two fixing units to drive the two ends of the Velcro to move away, thereby separating the adhered Velcro. The uniaxial force sensor located between one of the adapter plates and one of the fixing units measures the tensile force of the peeling strength of the Velcro. The overall structure is simple, easy to use, occupies a small area, has a low manufacturing cost, and improves practicality.

[0014] 2. The utility model installs a clamping frame in the middle of the peeling and fixing panel, and the bonding part of the Velcro is inserted into the clamping frame. The clamping frame restricts the Velcro, the stretching process is smooth, and the Velcro is not easy to jump, which helps to improve the accuracy of measuring force.

[0015] 3. The utility model installs a tensioning unit on the fixed block. The tensioning unit cooperates with the locking bolt, so that the movable block can quickly cooperate with the fixed block to clamp and fix the Velcro, thereby facilitating the peeling strength test of the Velcro.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a detailed structural diagram of the fixing unit and the clamping frame of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the fixing unit and the tensioning unit of the utility model;

[0020] Figure 4 It is a schematic diagram of the exploded structure of the clamping frame of the utility model;

[0021] Figure 5 It is a schematic diagram of the peeling state of the Velcro of the utility model.

[0022] In the figure: 1. Peeling fixed panel; 2. Linear module; 3. Stepper motor; 4. Adapter plate; 5. Single-axis force sensor; 6. Fixed unit; 61. Fixed block; 62. Movable block; 63. Locking bolt; 64. Nut; 7. Clamping frame; 71. Bracket; 72. First clamping plate; 73. Second clamping plate; 74. Slot; 8. Tensioning unit; 81. Fixed frame; 82. Pull rod; 83. Pull plate; 84. Shaft; 85. Eccentric pressure handle; 86. Fixed ring; 87. Rubber extrusion arc block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this technical field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5The hook and loop fastener peeling strength test tool of this embodiment includes a peeling fixed panel 1, and two symmetrically distributed linear modules 2 are fixedly installed on the upper surface of the peeling fixed panel 1. The end of the linear module 2 is installed with a stepping motor 3 for driving the linear module 2 to perform linear motion. The upper surfaces of the moving parts of the two linear modules 2 are both installed with symmetrically distributed adapter plates 4 through bolts. The adjacent surfaces of the two adapter plates 4 are both installed with fixing units 6. The fixing unit 6 includes a fixing block 61 and a movable block 62. One of the fixing blocks 61 is installed with the side wall of one of the adapter plates 4 through bolts. A uniaxial force sensor 5 is installed on the side wall of the other fixed block 61, and the uniaxial force sensor 5 is installed on the side wall of the other adapter plate 4 by bolts. The upper surfaces of the two fixed blocks 61 are pierced with locking bolts 63, and the lower ends of the locking bolts 63 pass through the movable block 62 and are threadedly connected with nuts 64. The locking bolts 63 are slidably connected to the fixed blocks 61 and the movable blocks 62. A clamping frame 7 for limiting the Velcro is installed in the middle of the upper surface of the peeling fixed panel 1, and a tensioning unit 8 for tightening the locking bolts 63 is installed on the upper surface of the fixed block 61.

[0025] like Figure 1 , 2 As shown in , 3, and 5, the test fixture structure in the utility model is similar to the existing test fixture structure. The main improvement of the utility model is that it is convenient to test the peel strength of the Velcro; when the Velcro needs to be tested for peel strength, the male and female ends of the Velcro are interlocked, and the two ends of the bonding are left uninterlocked. At this time, the two remaining ends are respectively inserted between the fixed block 61 and the movable block 62 in the two fixing units 6, and the nut 64 is rotated at this time. The nut 64 cooperates with the locking bolt 63 to drive the movable block 62 to rise, and the rising movable block 62 cooperates with the fixed block 61 to clamp the left end of the Velcro. At this time, the two stepper motors 3 are started to work, and the stepper motors 3 drive the linear module 2 to perform linear motion. The two linear modules 2 drive the two adapter plates 4 to move away from each other, and the two adapter plates 4 drive the two fixed units 6 to move away from each other, and then pull the two ends of the Velcro in opposite directions to peel off the interlocking Velcro. The uniaxial force sensor 5 located between one of the fixed blocks 61 and the adapter plate 4 pulls the fixed block 61 connected to it, and then the uniaxial force sensor 5 measures the tensile force of the peeling strength of the Velcro. The overall structure is simple, easy to use, occupies a small area, has a low manufacturing cost, and improves practicality.

[0026] Among them, the stepper motor 3 and the uniaxial force sensor 5 mentioned above can be purchased on the market. They are mature technologies and have been fully disclosed, so they are not repeated in the specification. The stepper motor 3 is equipped with a power connection line, and it is electrically connected to the external main controller and the 220V phase voltage through the power line, and the main controller can be a conventional known device such as a computer that plays a control role.

[0027] like Figure 2 , 3 As shown, there are two locking bolts 63 passed through the fixed block 61, and the two locking bolts 63 are symmetrically distributed on the fixed block 61; the two locking bolts 63 cooperate with the two nuts 64 to make the movable block 62 cooperate with the two sides of the fixed block 61 to clamp and fix the ends of the Velcro, so that the Velcro is subjected to more uniform pressure in the width direction, the force in the width direction is more balanced when stretched, and the test result is more accurate.

[0028] like Figure 1 , 2 As shown in Figure 4, the clamping frame 7 includes a bracket 71 installed on the upper surface of the peeling and fixing panel 1 by bolts, a first clamping plate 72 is installed on one side of the bracket 71 by bolts, and a second clamping plate 73 is installed on the other side of the first clamping plate 72 by bolts, and adjacent surfaces of the first clamping plate 72 and the second clamping plate 73 are provided with slots 74; the bracket 71 supports the first clamping plate 72, and the interlocking part of the Velcro is inserted into the slot 74 of the side wall adjacent to the first clamping plate 72 and the second clamping plate 73, and the slot 74 limits the interlocking part of the Velcro to prevent the Velcro from jumping when stretched, so that the reading of the uniaxial force sensor 5 is more stable and accurate.

[0029] like Figure 4 As shown, the upper end of the slot 74 is provided with an oblique chamfer, and the length of the slot 74 is equal to the length of the first clamping plate 72 and the second clamping plate 73; when the Velcro is inserted into the slot 74, the oblique chamfer at its upper end is used to guide the Velcro to facilitate insertion. At the same time, if the Velcro is long, it can directly pass through the slot 74 for easy use.

[0030] like Figure 3As shown, the tensioning unit 8 includes a fixing frame 81 fixedly mounted on the upper surface of the fixing block 61, a pull rod 82 is penetrated in the middle of the upper surface of the fixing frame 81, the pull rod 82 is slidably connected to the fixing frame 81, a pull plate 83 is installed at the lower end of the pull rod 82, two locking bolts 63 both penetrate the pull plate 83, the pull plate 83 is slidably connected to the outer wall of the locking bolt 63, the screwing head of the locking bolt 63 blocks the pull plate 83, the upper end of the pull rod 82 is fixedly connected to the shaft rod 84, the outer wall of the shaft rod 84 is rotatably connected to the eccentric pressing handle 85, the upper surface of the fixing frame 81 is rotatably connected to the fixing ring 86, the upper surface of the fixing ring 86 is fixedly connected to the rubber extrusion arc block 87, the pull rod 82 penetrates the fixing ring 86 and the rubber extrusion arc block 87, the pull rod 82 is slidably connected to the inner wall of the fixing ring 86 and the rubber extrusion arc block 87, and the eccentric pressing handle 85 is against the arc surface of the rubber extrusion arc block 87; When it is necessary to clamp and fix the unfastened end of the Velcro, first insert the end of the Velcro between the movable block 62 and the fixed block 61, and then rotate the eccentric pressing handle 85. The eccentric pressing handle 85 and the rotating part of the shaft rod 84 are cylindrical structures, and the axis there is offset from the axis of the shaft rod 84, so that the eccentric pressing handle 85 squeezes the rubber extrusion arc block 87, and then drives the pull rod 82 to move upward through the shaft rod 84, and then drives the pull plate 83 to move upward. The pull plate 83 pulls the screw head of the locking bolt 63, so that the locking bolt 63 pulls the nut 64 to move upward, and then the nut 64 drives the movable block 62 to move upward and cooperate with the fixed block 61 to clamp and fix the unfastened end of the Velcro, the fixing frame 81 supports the fixing ring 86, and the fixing ring 86 supports the rubber extrusion arc block 87, so as to realize rapid clamping and fixation of the Velcro, and facilitate the testing of the peeling strength of the Velcro.

[0031] like Figure 3 As shown, the lower end of the pull rod 82 passes through the pull plate 83, and the pull rod 82 is threadedly connected to the pull plate 83; the pull rod 82 can rotate, thereby driving the height of the pull plate 83 to rise, and can also cooperate with the threaded connection between the nut 64 and the locking bolt 63 to adjust the distance that the movable block 62 moves when the eccentric pressure handle 85 is rotated, so that the fixed block 61 and the movable block 62 can adapt to the Velcro of different thicknesses for clamping and fixing, thereby improving adaptability.

[0032] like Figure 2 , 3 As shown, the side wall of the fixed block 61 is an L-shaped structure, one end of the uniaxial force sensor 5 is fixedly installed on the middle part of the side wall of one of the fixed blocks 61, and the middle part of the side wall of the other fixed block 61 is installed on the side wall of one of the adapter plates 4 through bolts; the tension applied to the fixed block 61 of the L-shaped structure is located in the middle part of the side wall of the fixed block 61, thereby stabilizing the pulling of the fixed block 61, so that the tension applied to the fixed block 61 and the clamped Velcro are in a horizontal state, thereby ensuring the accuracy of the test results.

[0033] Implementation steps in this embodiment: when it is necessary to test the peel strength of the Velcro, the male and female ends of the Velcro are interlocked, and the two ends of the Velcro are left uninterlocked. At this time, the two ends are respectively inserted between the fixed block 61 and the movable block 62 in the two fixing units 6, and the interlocking parts of the Velcro are inserted into the slots 74 of the side walls adjacent to the first clamping plate 72 and the second clamping plate 73. At this time, the nut 64 is rotated, and the eccentric pressing handle 85 is rotated. The rotating part of the eccentric pressing handle 85 and the shaft rod 84 are cylindrical structures, and the axis there is offset from the axis of the shaft rod 84, so that the eccentric pressing handle 85 squeezes the rubber extrusion arc block 87, and then drives the pull rod 82 to move upward through the shaft rod 84, and then drives the pull plate 83 to move upward, and the pull plate 83 pulls the screw head of the locking bolt 63, so that the locking bolt 63 pulls the nut 6 4 moves up, thereby causing the nut 64 to drive the movable block 62 to move up and cooperate with the fixed block 61 to clamp and fix the unfastened end of the Velcro. At this time, the two stepper motors 3 are started to work, and the stepper motor 3 drives the linear module 2 to perform linear motion. The two linear modules 2 drive the two adapter plates 4 to move away from each other, and the two adapter plates 4 drive the two fixed units 6 to move away from each other, thereby pulling the two ends of the Velcro in opposite directions to peel off the fastened Velcro. The uniaxial force sensor 5 located between one of the fixed blocks 61 and the adapter plate 4 pulls the fixed block 61 connected thereto, thereby causing the uniaxial force sensor 5 to measure the tensile force of the peeling strength of the Velcro, and the slot 74 limits the fastening part of the Velcro to prevent the Velcro from jumping when stretched, so that the reading of the uniaxial force sensor 5 is more stable and accurate.

[0034] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A hook and loop fastener peel strength test tool, comprising a peeling fixing panel (1), characterized in that: Two symmetrically distributed linear modules (2) are fixedly installed on the upper surface of the peeling fixed panel (1), and a stepping motor (3) for driving the linear module (2) to perform linear motion is installed at the end of the linear module (2). The upper surfaces of the moving parts of the two linear modules (2) are both installed with symmetrically distributed adapter plates (4) through bolts, and the adjacent surfaces of the two adapter plates (4) are both installed with fixed units (6), and the fixed units (6) include fixed blocks (61) and movable blocks (62), one of the fixed blocks (61) is installed with a side wall of one of the adapter plates (4) through bolts, and the side wall of the other fixed block (61) is installed with a A uniaxial force sensor (5) is installed with a side wall of another adapter plate (4) by means of bolts. The upper surfaces of the two fixed blocks (61) are both provided with locking bolts (63). The lower ends of the locking bolts (63) penetrate the movable block (62) and are threadedly connected with nuts (64). The locking bolts (63) are slidably connected with the fixed block (61) and the movable block (62). A clamping frame (7) for limiting the Velcro is installed in the middle of the upper surface of the stripping fixed panel (1). A tensioning unit (8) for tightening the locking bolts (63) is installed on the upper surface of the fixed block (61).

2. A hook and loop fastener peeling strength testing tool according to claim 1, characterized in that: There are two locking bolts (63) passing through the fixing block (61), and the two locking bolts (63) are symmetrically distributed on the fixing block (61).

3. The hook and loop fastener peeling strength testing tool according to claim 1, characterized in that: The clamping frame (7) comprises a bracket (71) mounted on the upper surface of the stripping fixing panel (1) by means of bolts, a first clamping plate (72) is mounted on one side of the bracket (71) by means of bolts, a second clamping plate (73) is mounted on the other side of the first clamping plate (72) by means of bolts, and adjacent surfaces of the first clamping plate (72) and the second clamping plate (73) are provided with slots (74).

4. A hook and loop fastener peeling strength testing tool according to claim 3, characterized in that: An oblique chamfer is formed at the upper end of the slot (74), and the length of the slot (74) is equal to the length of the first clamping plate (72) and the second clamping plate (73).

5. The hook and loop fastener peeling strength testing tool according to claim 2, characterized in that: The tensioning unit (8) comprises a fixing frame (81) fixedly mounted on the upper surface of the fixing block (61), a pull rod (82) is penetrated in the middle of the upper surface of the fixing frame (81), the pull rod (82) is slidably connected to the fixing frame (81), a pull plate (83) is installed at the lower end of the pull rod (82), two locking bolts (63) both penetrate the pull plate (83), the pull plate (83) is slidably connected to the outer wall of the locking bolt (63), the screwing head of the locking bolt (63) blocks the pull plate (83), and the upper end of the pull rod (82) is fixed A shaft rod (84) is fixedly connected, and an eccentric pressing handle (85) is rotatably connected to the outer wall of the shaft rod (84). A fixing ring (86) is rotatably connected to the upper surface of the fixing frame (81), and a rubber extrusion arc block (87) is fixedly connected to the upper surface of the fixing ring (86). The pull rod (82) passes through the fixing ring (86) and the rubber extrusion arc block (87). The pull rod (82) is slidably connected to the inner wall of the fixing ring (86) and the rubber extrusion arc block (87), and the eccentric pressing handle (85) abuts against the arc surface of the rubber extrusion arc block (87).

6. A hook and loop fastener peeling strength testing tool according to claim 5, characterized in that: The lower end of the pull rod (82) passes through the pull plate (83), and the pull rod (82) and the pull plate (83) are threadedly connected.

7. The hook and loop fastener peeling strength testing tool according to claim 1, characterized in that: The side wall of the fixed block (61) is an L-shaped structure, one end of the uniaxial force sensor (5) is fixedly mounted to the middle of the side wall of one of the fixed blocks (61), and the middle of the side wall of the other fixed block (61) is mounted to the side wall of one of the adapter plates (4) via bolts.

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