Combination Pliers

Abstract

The present invention relates to a locking pliers, which includes a pushing component, a clamping block, and opposed first jaw plates and second jaw plates. A sliding cavity is provided on the first jaw plate, the clamping block slides along the sliding cavity, and a plurality of clamping protrusions are provided on the clamping block. A plurality of clamping grooves adapted to the clamping protrusions are provided at corresponding positions on the second jaw plate. The pushing component pushes the clamping block along the sliding cavity to change the distance between the clamping block and the second jaw plate, with accurate testing and no distortion.

Description

[0001] This application is a divisional application of a patent application for the invention titled “Tape Peeling Tensile Testing Machine”. The application date of the original application is 2020-12-7, and the application number is 202011418478.8. Technical Field

[0002] The invention relates to the technical field of pliers, in particular to locking pliers. Background Art

[0003] In clothing or protective clothing that needs to be waterproof and windproof, it is often necessary to use heat-sealing tape to seal the seams of textiles. In order to accurately reflect the bonding performance of the heat-sealing tape, the tape must be tested by a tape peeling tensile tester. The existing peeling tensile tester generally grasps the textile and the tape respectively through two pliers. However, since the clamps of the pliers are made of metal materials, the friction coefficient with the tape is low, and the tape is generally narrow and thin. When the pliers are tightened, the two clamps of the pliers may not fit reliably, which may cause the tape to not be reliably clamped. In this way, the tape will slide along the clamps of the pliers during the test. After the tester has been running for a period of time, the tester may test the tension of the tape when it slides along the pliers instead of the peeling tension of the tape. If the tester does not observe carefully, it is difficult to distinguish whether the stretched tape is peeled off from the textile or slipped out of the pliers. The peeling tensile data tested by the tester may be distorted, and the pliers need to be improved. Summary of the invention

[0004] In order to overcome the technical defects of the prior art, the present invention provides a locking pliers, which can perform accurate tests without distortion.

[0005] The technical solution adopted by the present invention is:

[0006] A locking pliers, which is installed on a lifting device for lifting and lowering and cooperates with an upper clamping jaw, the lower locking pliers includes an anti-detachment clamping jaw and the movement trajectory of the anti-detachment clamping jaw points to the upper clamping jaw, the anti-detachment clamping jaw includes a pushing assembly, a clamping block and an opposing first jaw plate and a second jaw plate, the first jaw plate is provided with a sliding cavity, the clamping block slides along the sliding cavity, the clamping block is provided with a plurality of clamping protrusions, the second jaw plate and the clamping block are provided with a plurality of clamping grooves adapted to the clamping protrusions at corresponding positions, the pushing assembly is installed on the first jaw plate and is transmission-connected to the clamping block, the pushing assembly pushes the clamping block along the sliding cavity to change the distance between the clamping block and the second jaw plate.

[0007] Preferably, the pushing assembly includes a synchronizing rod and two push rods. The two push rods are both hinged to the first claw plate, and push cross bars are provided on the two push rods. The push cross bars extend into the sliding cavity to abut against the clamping block. The two push rods are parallel to each other. The synchronizing rod is respectively hinged to the two push rods to make the two push rods rotate synchronously. When the two push rods rotate, the corresponding push cross bars push the clamping block to slide along the sliding cavity.

[0008] Preferably, first serrated patterns are provided on each of the clamping protrusions, and second serrated patterns adapted to the first serrated patterns are provided on each of the clamping grooves.

[0009] Preferably, the peeling tensile testing machine further includes a loosening reaction assembly. The loosening reaction assembly is in transmission connection with the pushing assembly. The loosening reaction assembly is installed on the side of the anti-detachment claw close to the upper claw. The loosening reaction assembly slides along the anti-detachment claw, and the sliding direction of the loosening reaction assembly is parallel to the movement direction of the anti-detachment claw. When the loosening reaction assembly slides towards the upper claw, it drives the pushing assembly to move the clamping block away from the second claw plate.

[0010] Preferably, the loosening reaction assembly includes a first loosening slider, a second loosening slider and a control rod. A first dovetail groove is provided on the first claw plate, and the first loosening slider slides along the first dovetail groove. A second dovetail groove is provided on the second claw plate, and the second loosening slider slides along the second dovetail groove. The two ends of the control rod are respectively hinged to the first loosening slider and the pushing assembly.

[0011] Preferably, an anti-detachment step is provided in the sliding cavity, and an anti-detachment plate is provided on the clamping block. The anti-detachment step is used to catch the anti-detachment plate to prevent the clamping block from falling off.

[0012] The beneficial effects of the present invention are:

[0013] The powerful pliers include an anti-detachment claw, and the movement track of the anti-detachment claw points to the upper claw. Since the movement track generated by the anti-detachment claw following the lifting plate points to the upper claw, it is ensured that the movement direction of the anti-detachment claw clamping the tape is always consistent with the direction of the test tensile force;

[0014] The anti-detachment claw includes a pushing assembly, a clamping block, and opposing first and second claw plates. A sliding cavity is provided on the first claw plate, and the clamping block slides along the sliding cavity. A plurality of clamping protrusions are provided on the clamping block, and clamping grooves adapted to the clamping protrusions are provided at the corresponding positions of the second claw plate and the clamping block. The pushing assembly is installed on the first claw plate and is in transmission connection with the clamping block. The pushing assembly pushes the clamping block along the sliding cavity to change the distance between the clamping block and the second claw plate, and the clamping protrusions are embedded into the clamping grooves. In this way, the tape also follows the clamping protrusions and is embedded into the clamping grooves together, ensuring sufficient friction, avoiding the tape from loosening and causing the test data to be distorted, and ensuring the accuracy of the test. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the installation relationship between the first claw plate and the clamping block.

[0016] Figure 2 It is a schematic diagram of the structure of the push rod.

[0017] Figure 3 It is a schematic diagram of the structure of the anti - detachment claw.

[0018] Figure 4 It is a schematic diagram of the state of the anti - detachment claw when the tape becomes loose.

[0019] Figure 5 It is a schematic diagram of the state of the anti - detachment claw when the tape is clamped.

[0020] Explanation of the reference numerals:

[0021] 51. Anti - detachment claw; 511. Push - top assembly; 5111. Synchronous rod; 5112. Push rod; 5113. Push - top cross bar; 512. Clamping block; 5121. Clamping protrusion; 5122. Anti - detachment plate; 513. First claw plate; 5131. Sliding cavity; 514. Second claw plate; 5141. Clamping groove; 515. Loosening reaction assembly; 5151. First loosening slider; 5152. Second loosening slider; 5153. Control rod. Detailed implementation manners

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] As Figures 1-5As shown, the present embodiment provides a locking pliers, which is installed on a lifting device for lifting and lowering and is used in conjunction with an upper clamping jaw. The locking pliers include an anti-slipping clamping jaw 51, and the anti-slipping clamping jaw 51 includes a pushing assembly 511, a clamping block 512, and a first claw plate 513 and a second claw plate 514 opposed to each other. The first claw plate 513 is provided with a sliding cavity 5131, and the clamping block 512 slides along the sliding cavity 5131. An anti-slipping step is provided in the sliding cavity 5131, and an anti-slipping plate 5122 is provided on the clamping block 512. The anti-slipping step is used to clamp the anti-slipping plate 5122 to prevent the clamping block 512 from falling off. A plurality of clamping protrusions 5121 are provided on the clamping block 512, and a plurality of clamping grooves 5141 adapted to the clamping protrusions 5121 are provided at positions corresponding to the second claw plate 514 and the clamping block 512. The pushing assembly 511 is installed in the first claw plate 513. The push assembly 511 pushes the clamping block 512 along the sliding cavity 5131 to change the distance between the clamping block 512 and the second claw plate 514, and then the clamping protrusion 5121 is embedded in the clamping groove 5141 when clamping the tape, so that the tape is also embedded in the clamping groove 5141 along with the clamping protrusion 5121, thereby ensuring the reliable fixation of the tape, avoiding the loosening of the tape and causing distortion of the test data, and ensuring the accuracy of the test. In this embodiment, each clamping protrusion 5121 is provided with a first serrated pattern, and each clamping groove 5141 is provided with a second serrated pattern adapted to the first serrated pattern. The cooperation of the first serrated pattern and the second serrated pattern further strengthens the fixation of the tape and further avoids the slippage of the tape.

[0024] In this embodiment, the push assembly 511 includes a synchronous rod 5111 and two push rods 5112. The two push rods 5112 are hinged on the first claw plate 513 and are provided with a push cross bar 5113. The push cross bar 5113 extends into the sliding cavity 5131 to support the clamping block 512. The two push rods 5112 are parallel to each other. The synchronous rod 5111 is hinged to the two push rods 5112 respectively so that the two push rods 5112 rotate synchronously. In this embodiment, the two push rods 51 The connecting line between 12 and the hinged position of the first claw plate 513 is parallel to the synchronization rod 5111, which can ensure that the two push rods 5112 maintain synchronous rotation parallel to each other. When the two push rods 5112 rotate, the corresponding push cross bar 5113 pushes the clamping block 512 to slide along the sliding cavity 5131. Since the two push rods 5112 rotate synchronously, the clamping block 512 is evenly stressed. When the two push rods 5112 push the clamping block 512, the clamping block 512 will not be stuck in the sliding cavity 5131 due to uneven force.

[0025] The peeling tensile testing machine further includes a loosening reaction assembly 515. The loosening reaction assembly 515 includes a first loosening slider 5151, a second loosening slider 5152, and a control rod 5153. A first dovetail groove is provided on the first claw plate 513, and the first loosening slider 5151 slides along the first dovetail groove. A second dovetail groove is provided on the second claw plate 514, and the second loosening slider 5152 slides along the second dovetail groove. Two ends of the control rod 5153 are respectively hinged to the first loosening slider 5151 and the synchronizing rod 5111. The sliding directions of the first loosening slider 5151 and the second loosening slider 5152 are both parallel to the movement direction of the lifting device. The first loosening slider 5151 and the second loosening slider 5152 clamp the tape. During the test, when the tape slips due to insufficient clamping, the first loosening slider 5151 and the second loosening slider 5152 are pulled by the tape and slide along the first dovetail groove and the second dovetail groove respectively. When the first loosening slider 5151 and the second loosening slider 5152 slide towards the upper claw direction, they drive the control rod 5153 to move, causing the top push rod 5112 to rotate, so that the clamping block 512 moves away from the second claw plate 514, and thus the clamping protrusion 5121 on the clamping block 512 disengages from the clamping groove 5141, and the tape loses clamping and detaches from the anti-detachment claw 51. In this way, the experimenter can observe the tape detachment after the detection is completed, discover and re-detect in time, avoid incorrect data from being entered, and the detection data is reliable and free from distortion.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A locking pliers, which is mounted on a lifting device for lifting and cooperating with an upper jaw, characterized in that: The locking pliers include anti - detachment jaws, and the movement locus of the anti - detachment jaws points to the upper jaw. The anti - detachment jaws include a pushing component, a clamping block, and opposed first jaw plates and second jaw plates. A sliding cavity is provided on the first jaw plate, the clamping block slides along the sliding cavity, a plurality of clamping protrusions are provided on the clamping block, and a plurality of clamping grooves adapted to the clamping protrusions are provided at positions corresponding to the clamping block on the second jaw plate. The pushing component is installed on the first jaw plate and is in transmission connection with the clamping block. The pushing component pushes the clamping block along the sliding cavity to change the distance between the clamping block and the second jaw plate. The locking pliers further include a loosening reaction component, the loosening reaction component is in transmission connection with the pushing component, the loosening reaction component is installed on the side of the anti - detachment jaws close to the upper jaw, the loosening reaction component slides along the anti - detachment jaws, and the sliding direction of the loosening reaction component is parallel to the movement direction of the lifting device. When the loosening reaction component slides towards the upper jaw, it drives the pushing component to move the clamping block away from the second jaw plate.

2. The strong-jaw pliers according to claim 1, characterized in that: The pushing component includes a synchronous rod and two push rods. The two push rods are both hinged on the first jaw plate, and push cross - bars are provided on the two push rods. The push cross - bars extend into the sliding cavity to abut against the clamping block. The two push rods are parallel to each other. The synchronous rod is respectively hinged to the two push rods to make the two push rods rotate synchronously. When the two push rods rotate, the corresponding push cross - bars push the clamping block to slide along the sliding cavity.

3. The locking pliers according to claim 1, characterized in that: First serrated patterns are provided on each of the clamping protrusions, and second serrated patterns adapted to the first serrated patterns are provided on each of the clamping grooves.

4. The locking pliers according to claim 1, wherein: The loosening reaction component includes a first loosening slider, a second loosening slider, and a control rod. A first dovetail groove is provided on the first jaw plate, the first loosening slider slides along the first dovetail groove. A second dovetail groove is provided on the second jaw plate, the second loosening slider slides along the second dovetail groove. The two ends of the control rod are respectively hinged to the first loosening slider and the pushing component.

5. The locking pliers according to claim 1, characterized in that: An anti - detachment step is provided in the sliding cavity, and an anti - detachment plate is provided on the clamping block. The anti - detachment step is used to block the anti - detachment plate to prevent the clamping block from falling off.

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