A target fixture for bulletproof fabric testing

Through the annular base plate and self-locking fixture structure, the problem of unstable clamping of bulletproof fabrics in high-speed impact experiments is solved, and the stable clamping of the edges of the fabric is achieved to ensure the accuracy of the test results.

CN116499866BActive Publication Date: 2025-08-26WUHAN TEXTILE UNIV
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Patent Information

Application Number
CN202310276403.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-21
Publication Date
2025-08-26
Estimated Expiration
2043-03-21

AI Technical Summary

Technical Problem

It is difficult for existing fixtures to effectively clamp the fabric target in high-speed impact experiments of bulletproof fabrics, causing yarn or fibers to slip, affecting the accuracy of the test results.

Method used

The ring-shaped base plate and self-locking fixture structure are adopted, and the edge of the base plate is arranged at the edge of the base plate through multiple self-locking fixtures. The edge of the bulletproof fabric is clamped by the self-locking fixture. When the middle part is impacted by the projectile, the tightening strips and the abutment strips are close to each other to increase the clamping force to ensure that the edge of the fabric is fixed.

Benefits of technology

The clamping force on the edges of bulletproof fabrics is improved to prevent the fabric from falling out of the fixture under the impact of the projectiles, ensuring the accuracy and reliability of the test results.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a target clamp for testing bulletproof fabrics, comprising a base plate and a plurality of self-locking clamps. The base plate is horizontally arranged and annular, the plurality of self-locking clamps are annularly spaced at the edge of the upper end of the base plate, and the inner hole of the base plate is located between the plurality of self-locking clamps. The bulletproof fabric is laid flat on the upper end of the base plate, and its edge is clamped by the plurality of self-locking clamps. When the middle part of the bulletproof fabric is impacted, the self-locking clamps increase the clamping force corresponding to the edge of the bulletproof fabric. By setting the base plate to annular, its inner hole constitutes a target hole, and the bulletproof fabric is laid on the upper end of the base plate and covers the inner hole of the base plate, the plurality of self-locking clamps jointly fix the edge of the bulletproof fabric and unfold the bulletproof fabric. At this time, a projectile can be fired at the inner hole of the base plate. The impact force of the projectile on the bulletproof fabric makes the plurality of self-locking clamps have a higher clamping force on the edge of the bulletproof fabric, thereby preventing the bulletproof fabric from being separated from the self-locking clamp under the impact of the projectile.
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Description

Technical Field

[0001] The invention belongs to the field of bullet-proof fabric testing tools, and in particular relates to a target clamp used for bullet-proof fabric testing. Background Art

[0002] In the high-speed impact test of bullet-proof fabrics, the bullet-proof fabric is used as the target, but a clamp is needed to clamp the spread target to ensure that the target does not fly out with the projectile when it is impacted by the projectile. For fabric targets, especially woven fabric targets made of warp and weft yarns, it is difficult for general clamps to ensure that the yarn or part of the fiber will not slip out of the clamp when the projectile impacts at high speed. This is mainly because general clamps use upper and lower clamps to apply normal force to the fabric, and limit the slippage of the fabric by increasing the sliding friction between the contact surface of the fabric and the clamps. The disadvantage of this clamping method is that the force area of ​​the fabric edge is small and the force is uneven. If the main yarn is pulled by the projectile, it is easy to slip, affecting the accuracy of the test results. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a target clamp with a simple structure, which can clamp the edge of the bulletproof fabric as a whole, and at the same time improve the clamping performance of the bulletproof fabric when the middle of the bulletproof fabric is impacted by a projectile.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a target fixture for testing bulletproof fabrics, comprising a base plate and a plurality of self-locking fixtures, wherein the base plate is horizontally arranged and annular, the plurality of self-locking fixtures are circumferentially spaced at the edge of the upper end of the base plate, and the inner hole of the base plate is located between the plurality of self-locking fixtures, the bulletproof fabric is laid flat on the upper end of the base plate, and its edges are clamped by the plurality of self-locking fixtures, and the self-locking fixtures increase the clamping force corresponding to the edge of the bulletproof fabric when the middle part of the bulletproof fabric is impacted.

[0005] The beneficial effect of the above technical solution is that: by setting the base plate into a ring shape, the inner hole of the base plate constitutes a target hole, and the bulletproof fabric is laid on the upper end of the base plate to cover the inner hole of the base plate, and then the edge of the bulletproof fabric is clamped by multiple self-locking clamps distributed circumferentially at intervals on the edge of the inner hole of the base plate. At this time, the multiple self-locking clamps jointly fix the edge of the bulletproof fabric and unfold the bulletproof fabric. At this time, the projectile can be fired at the inner hole of the base plate. The impact force of the projectile on the bulletproof fabric makes the clamping force of the multiple self-locking clamps on the edge of the bulletproof fabric higher (that is, the greater the impact force, the greater the clamping force of the self-locking clamps), which can prevent the bulletproof fabric from escaping from the self-locking clamps under the impact of the projectile.

[0006] The self-locking clamp in the above technical solution includes a lower pressing strip, a tensioning strip, an abutting strip and a first fastener, each of the abutting strips is convexly arranged in the middle of the upper end of the base plate and is located at the edge of the inner hole of the base plate, and the ends of two adjacent abutting strips that are close to each other are close to each other or formed as one piece, the bulletproof fabric is horizontally laid above a plurality of the abutting strips, the tensioning strip is placed on the side of the corresponding abutting strip away from the inner hole of the base plate, and the edge of the bulletproof fabric is pressed onto the base plate, the side of the tensioning strip away from the abutting strip is a first slope surface, and Its inclination direction is toward obliquely upward, and the side of the lower pressing strip close to the corresponding tensioning strip is a second slope surface that fits with the first slope surface, and the inclination direction of the second slope surface is toward obliquely downward. The lower pressing strip is connected to the base plate through the corresponding first fastener and is pressed against the first slope surface corresponding to the tensioning strip. When the middle part of the bullet-proof fabric is impacted, it drives multiple tensioning strips to move upward under the guidance of the corresponding lower pressing strip, and simultaneously tends to move close to the corresponding abutment strip to increase the clamping force on the edge of the bullet-proof fabric.

[0007] The beneficial effect of the above technical solution is that: a ring is formed by multiple abutment strips, and the two ends of each tensioning strip can be aligned with the two ends of the corresponding abutment strip. In this way, the edge of the bullet-proof fabric can be better clamped in the ring direction except for the area where two adjacent abutment strips are close to each other at one end.

[0008] In the above technical solution, the abutting strip and the side corresponding to the tensioning strip close to each other are both vertical surfaces.

[0009] The beneficial effect of the above technical solution is that when the tensioning strip is impacted in the middle of the bullet-proof fabric, the edge of the bullet-proof fabric tends to drive the tensioning strip upward under the pull of the impact force, and at this time the tensioning strip will synchronously move close to the corresponding abutment strip under the action of the second inclined surface of the lower pressure strip, so that the bullet-proof fabric is clamped tighter between the tensioning strip and the corresponding abutment strip (that is, the greater the impact force, the greater the clamping force between the tensioning strip and the corresponding abutment strip).

[0010] In the above technical solution, the abutment strip and the side of the corresponding tensioning strip close to each other are both friction surfaces.

[0011] The beneficial effect of the above technical solution is that it can further improve the friction between the bulletproof fabric and the side of the abutment strip and the corresponding tensioning strip close to each other, thereby making the clamping effect of the two on the bulletproof fabric better.

[0012] In the above technical solution, each of the self-locking clamps has two lower pressure strips and two first fasteners, and the two lower pressure strips correspond one-to-one to the two first fasteners. Each lower pressure strip is placed at both ends of the corresponding tensioning strip, and is respectively connected to the base plate through the corresponding first fasteners and pressed down on the first slope surface of the corresponding tensioning strip.

[0013] The beneficial effect of the above technical solution is that two pressing bars can be used to press down the tensioning bar from both ends of the corresponding tensioning bar so that the clamping force on the bulletproof fabric is evenly distributed on the side where the tensioning bar and the corresponding abutting bar are close to each other.

[0014] In the above technical solution, four self-locking clamps are provided, and the four abutment strips form a rectangle and are integrally formed with the bottom plate.

[0015] The beneficial effects of the above technical solution are: its structure is simple, and the four abutment strips form a square ring structure, which is simpler in structure and easier to assemble.

[0016] In the above technical solution, the first fastener includes a first bolt and a first nut, each of the lower pressure strips is provided with a first through hole running through it from top to bottom, and a second through hole aligned with the first through hole is provided at a corresponding position on the base plate, and after the first through hole is aligned with the corresponding second through hole, a first bolt is inserted into the through hole, and the threaded end of the first bolt is threadedly connected to at least one first nut to press the corresponding lower pressure strip onto the corresponding tensioning strip.

[0017] The beneficial effects of the above technical solution are: its structure is simple and the fastening effect is good.

[0018] In the above technical solution, the first fastener includes a screw and a first nut. Each of the lower pressure strips is provided with a first through hole running through the upper and lower parts, and the screw is vertically arranged at the upper end of the base plate and aligned with the corresponding first through hole. The upper end of each screw passes through the corresponding first through hole and is threadedly connected to the first nut to press the corresponding lower pressure strip onto the corresponding tensioning strip.

[0019] The beneficial effects of the above technical solution are: its structure is simple and the fastening effect is good.

[0020] The above technical solution also includes an upper splint, which is annular, and its outer edge is consistent with the shape of the multiple abutment strips, and the inner hole of the upper splint is aligned with the inner hole of the bottom plate. A connecting ear is protruded at each corner of the outer edge of the upper splint, and the upper splint is horizontally placed on the multiple abutment strips, and each side of its outer edge is aligned with any one of the abutment strips. Each connecting ear is connected to the bottom plate by a second fastener to clamp the bulletproof fabric between it and the abutment strip.

[0021] The beneficial effect of the above technical solution is that the clamping effect of the entire target body on the bulletproof fabric can be further improved through the upper clamping plate and the multiple abutment strips.

[0022] In the above technical solution, the second fastener includes a second bolt and a second nut, each connecting ear is provided with a third through hole running through it up and down, and the position of the base plate corresponding to the third through hole is provided with a fourth through hole running through it up and down, each of the third through holes is aligned with the corresponding fourth through hole and a second bolt is inserted into it, and the thread of the second bolt is threadedly connected to at least one of the second nut to press the upper clamp onto the multiple abutment strips.

[0023] The beneficial effects of the above technical solution are: its structure is simple and the fastening effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an elevation view of the assembled target fixture according to an embodiment of the present invention;

[0025] Figure 2 is an elevation view of the bottom plate and four abutment strips according to an embodiment of the present invention;

[0026] Figure 3 is a cross-sectional view of the bottom plate and four abutment strips according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the assembly of the base plate, bulletproof fabric and self-locking clamp in an embodiment of the present invention;

[0028] Figure 5 Another schematic diagram of the assembly of the bottom plate, bulletproof fabric, and self-locking clamp in an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the corresponding lower pressing strip and tensioning strip in the embodiment of the present invention;

[0030] Figure 7 An exploded view of the target clamp according to an embodiment of the present invention excluding the first fastener and the second fastener;

[0031] Figure 8 is a cross-sectional view of the target fixture according to an embodiment of the present invention;

[0032] Figure 9 A top view of the target fixture according to an embodiment of the present invention excluding the first fastener and the second fastener;

[0033] Figure 10 A top view of the target clamp according to an embodiment of the present invention excluding the first fastener, the second fastener, and the upper clamping plate;

[0034] Figure 11 Schematic diagram of the assembly of the upper clamping plate and the bottom plate in an embodiment of the present invention.

[0035] In the figure: 1 bottom plate, 11 second through hole, 12 fourth through hole, 2 self-locking clamp, 21 lower pressure strip, 211 second slope surface, 212 first through hole, 22 tensioning strip, 221 first slope surface, 23 abutting strip, 24 first fastener, 241 first bolt, 242 first nut, 243 screw, 3 bulletproof fabric, 4 upper splint, 41 connecting ear, 411 third through hole, 42 second fastener, 421 second bolt, 422 second nut. DETAILED DESCRIPTION

[0036] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0037] like Figures 1-10 As shown, this embodiment provides a target fixture for bulletproof fabric testing, including a base plate 1 and a plurality of self-locking fixtures 2, wherein the base plate 1 is horizontally arranged and annular, and the plurality of self-locking fixtures 2 are circumferentially spaced at the edge of the upper end of the base plate 1, and the inner hole of the base plate 1 is located between the plurality of self-locking fixtures 2, and the bulletproof fabric 3 is laid flat on the upper end of the base plate 1, and its edges are clamped by the plurality of self-locking fixtures 2, and the self-locking fixtures 2 increase the clamping force corresponding to the edge of the bulletproof fabric 3 when the middle part of the bulletproof fabric 3 is impacted. By setting the base plate to be annular, The inner hole of the base plate forms a target hole, and the bulletproof fabric is laid on the upper end of the base plate to cover the inner hole of the base plate. Then, the edge of the bulletproof fabric is clamped by a plurality of self-locking clamps circumferentially spaced and distributed around the edge of the inner hole of the base plate. At this time, the plurality of self-locking clamps jointly fix the edge of the bulletproof fabric and unfold the bulletproof fabric. At this time, a projectile can be fired at the inner hole of the base plate. The impact force of the projectile on the bulletproof fabric causes the plurality of self-locking clamps to clamp the edges of the bulletproof fabric more strongly (that is, the greater the impact force, the greater the clamping force of the self-locking clamps). In this way, the bulletproof fabric can be prevented from being separated from the self-locking clamps under the impact of the projectile.

[0038] The self-locking clamp 2 in the above technical solution includes a lower pressing strip 21, a tensioning strip 22, an abutting strip 23 and a first fastener 24, each of the abutting strips 23 is convexly arranged at the middle of the upper end of the base plate 1 and is located at the edge of the inner hole of the base plate 1, and the ends of the two adjacent abutting strips 23 that are close to each other are close to each other or formed as one piece, the bulletproof fabric 3 is horizontally laid above the multiple abutting strips 23, the tensioning strip 22 is placed on the side of the corresponding abutting strip 23 away from the inner hole of the base plate 1, and the edge of the bulletproof fabric 3 is pressed on the base plate 1, the side of the tensioning strip 22 away from the abutting strip 23 is a first slope surface 221, and its inclination direction is obliquely upward, and the side of the lower pressing strip 21 close to the corresponding tensioning strip 22 is inclined with the first slope surface 221 is fitted with a second sloping surface 211, and the inclination direction of the second sloping surface 211 is obliquely downward. The lower pressing strip 21 is connected to the base plate 1 through the corresponding first fastener 24 and is pressed against the first sloping surface 221 corresponding to the tensioning strip 22. When the middle part of the bullet-proof fabric 3 is impacted, it drives multiple tensioning strips 22 to move upward under the guidance of the corresponding lower pressing strip 21, and simultaneously tends to move close to the corresponding abutment strip 23 to increase the clamping force on the edge of the bullet-proof fabric 3. A ring is formed by multiple abutment strips. At this time, the two ends of each tensioning strip can be aligned with the two ends of the corresponding abutment strip, so that the edge of the bullet-proof fabric can be better clamped in the ring direction except for the area where two adjacent abutment strips are close to each other at one end.

[0039] The abutment strip 23 and the corresponding tensioning strip 22 in the above technical solution are both vertical surfaces, so that when the tensioning strip is impacted in the middle of the bullet-proof fabric, the edge of the bullet-proof fabric tends to drive the tensioning strip to move upward under the pull of the impact force, and at this time the tensioning strip will synchronously move under the action of the second inclined surface of the lower pressure strip to approach the corresponding abutment strip, so that the bullet-proof fabric is clamped tighter between the tensioning strip and the corresponding abutment strip (that is, the greater the impact force, the greater the clamping force between the tensioning strip and the corresponding abutment strip).

[0040] In the above technical solution, the abutment strip 23 and the corresponding tensioning strip 22 on the side close to each other are both friction surfaces (the side of the abutment strip and the tensioning strip on the side close to each other are both provided with bumps or transversely arranged lines to increase friction). This can further improve the friction between the bulletproof fabric and the abutment strip and the corresponding tensioning strip on the side close to each other, thereby making the clamping effect of the two on the bulletproof fabric better.

[0041] In the above technical solution, each of the self-locking clamps 2 has two lower pressing strips 21 and two first fasteners 24, and the two lower pressing strips 21 correspond one to one with the two first fasteners 24. Each of the lower pressing strips 21 is placed at the two ends of the corresponding tensioning strip 22, and is connected to the base plate 1 through the corresponding first fasteners 24 and pressed down on the first slope surface 221 of the corresponding tensioning strip 22. In this way, two lower pressing strips can be used to press down the tensioning strip from both ends of the corresponding tensioning strip so that the clamping force on the bulletproof fabric is evenly distributed on the side where the tensioning strip and the corresponding abutting strip are close to each other.

[0042] The self-locking clamp 2 described in the above technical solution is provided with four, and the four abutment bars 23 are enclosed in a rectangle and are integrally formed with the base plate 1. Its structure is simple, and the four abutment bars are enclosed in a square ring structure, which is simpler in structure and easy to assemble. Preferably, the inner hole of the base plate is aligned with the inner hole of the square ring structure enclosed by the four abutment bars. At this time, the inner hole of the base plate is a square hole, and the four abutment bars are arranged along the edge of the inner hole of the base plate. Of course, the inner hole of the base plate can also be a circular hole (the side of the four abutment bars close to the inner hole of the base plate can be arc-shaped, and the four abutment bars are enclosed in an annular member with an inner circle and an outer square, and the circular hole enclosed by the four abutment bars is aligned with the inner hole of the base plate). When the abutment bars are integrally formed with the base plate, the inner hole enclosed by the four abutment bars is the inner hole of the base plate, and the upper end faces of the four abutment bars are all flat surfaces.

[0043] In the above technical solution, the first fastener 24 includes a first bolt 241 and a first nut 242. Each of the lower pressure strips 21 is provided with a first through hole 212 running through it from top to bottom, and a second through hole 11 aligned with the first through hole 212 is provided at a corresponding position on the base plate 1. After the first through hole 212 is aligned with the corresponding second through hole 11, a first bolt 241 is inserted, and the threaded end of the first bolt 241 is threadedly connected to at least one first nut 242 to press the corresponding lower pressure strip 21 onto the corresponding tensioning strip 22. It has a simple structure and good fastening effect.

[0044] In the above technical solution, the first fastener 24 includes a screw 243 and a first nut 242. Each of the lower pressure strips 21 is provided with a first through hole 212 running through the upper and lower parts, and the screw 243 is vertically arranged at the upper end of the base plate 1 and aligned with the corresponding first through hole 212. The upper end of each screw 243 passes through the corresponding first through hole 212 and is threadedly connected to the first nut 242 to press the corresponding lower pressure strip 21 onto the corresponding tensioning strip 22. It has a simple structure and good fastening effect.

[0045] The above technical solution also includes an upper splint 4, which is annular, and its outer edge is consistent with the shape of the multiple abutment strips 23, and the inner hole of the upper splint 4 is aligned with the inner hole of the base plate 1. A connecting ear 41 is protruded at each corner of the outer edge of the upper splint 4, and the upper splint 4 is horizontally placed on the multiple abutment strips 23, and each side of its outer edge is aligned with any one of the abutment strips 23. Each connecting ear 41 is connected to the base plate 1 by a second fastener 42 to clamp the bulletproof fabric 3 between it and the abutment strip 23. In this way, the clamping effect of the entire target body on the bulletproof fabric can be further improved through the upper splint and the multiple abutment strips.

[0046] The inner hole of the upper splint is consistent in size with the inner hole of the bottom plate and is aligned, and the size of the outer flange of the upper splint is consistent with the outer edge size of the square ring structure enclosed by the four abutting rods.

[0047] In the above technical solution, the second fastener 42 includes a second bolt 421 and a second nut 422. Each connecting ear 41 is provided with a third through hole 411 running through it from top to bottom, and the position of the base plate 1 corresponding to the third through hole 411 is provided with a fourth through hole 12 running through it from top to bottom. Each of the third through holes 411 is aligned with the corresponding fourth through hole 12 and a second bolt 421 is inserted into it. The thread of the second bolt 421 is threadedly connected to at least one second nut 422 to press the upper clamping plate 4 onto the multiple abutment strips 23. It has a simple structure and good fastening effect.

[0048] Among them, Figure 7 、 Figures 9-11 As shown, each of the connecting ears can extend downward to thicken. After the two ends of each tensioning strip are aligned with the two ends of the corresponding abutting strip, the four corners of the square ring enclosed by the four tensioning strips all have square notches (see Figure 10 ), so the connecting ear can be consistent with the size of the square notch, and its thickness must meet the requirement that when the upper splint is pressed against the upper ends of the multiple abutment strips, the lower end of each connecting ear abuts against the bottom plate, so the fourth through hole is arranged on the bottom plate and is located at the square notch. In addition, when the tensioning strip is pressed against the bulletproof fabric, its upper end should not protrude beyond the upper end of the abutment strip, which can also avoid the end of the tensioning strip affecting the fit of the corner of the upper splint at the end of the abutment strip, thereby avoiding the connecting ear being bent downward under the action of the second fastener.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A target fixture for testing bulletproof fabrics, characterized in that: The invention comprises a base plate (1) and a plurality of self-locking clamps (2), wherein the base plate (1) is arranged horizontally and in an annular shape, and the plurality of self-locking clamps (2) are arranged at intervals at the edge of the upper end of the base plate (1) in an annular direction, and the inner hole of the base plate (1) is located between the plurality of self-locking clamps (2), and the bulletproof fabric (3) is laid flat on the upper end of the base plate (1), and its edges are clamped by the plurality of self-locking clamps (2), and the self-locking clamps (2) increase the clamping force of the corresponding portion of the edge of the bulletproof fabric (3) when the middle portion of the bulletproof fabric (3) is impacted; The self-locking clamp (2) includes a lower pressing strip (21), a tensioning strip (22), an abutting strip (23) and a first fastener (24), each of the abutting strips (23) is protruding from the middle of the upper end of the base plate (1) and is located at the edge of the inner hole of the base plate (1), and the ends of two adjacent abutting strips (23) that are close to each other are close to each other or formed as one piece, the bulletproof fabric (3) is horizontally laid above the plurality of abutting strips (23), the tensioning strip (22) is placed on the side of the corresponding abutting strip (23) away from the inner hole of the base plate (1), and the edge of the bulletproof fabric (3) is pressed onto the base plate (1), and the side of the tensioning strip (22) away from the abutting strip (23) is a first slope surface (221), The tilt direction thereof is obliquely upward, the side of the lower pressing strip (21) close to the corresponding tensioning strip (22) is a second slope surface (211) that fits the first slope surface (221), and the tilt direction of the second slope surface (211) is obliquely downward, the lower pressing strip (21) is connected to the bottom plate (1) through the corresponding first fastener (24), and is pressed against the first slope surface (221) corresponding to the tensioning strip (22). When the middle part of the bulletproof fabric (3) is impacted, the plurality of tensioning strips (22) are driven to move upward under the guidance of the corresponding lower pressing strip (21), and simultaneously tend to move close to the corresponding abutting strip (23) to increase the clamping force on the edge of the bulletproof fabric (3); The first fastener (24) includes a first bolt (241) and a first nut (242), each of the lower pressure strips (21) is provided with a first through hole (212) extending therethrough, and a second through hole (11) aligned with the first through hole (212) is provided at a corresponding position on the base plate (1), and a first bolt (241) is inserted after the first through hole (212) is aligned with the corresponding second through hole (11), and the threaded end of the first bolt (241) is threadedly connected to at least one first nut (242) to press the corresponding lower pressure strip (21) onto the corresponding tension strip (22).

2. The target fixture for bulletproof fabric testing according to claim 1, characterized in that: The side of the abutment strip (23) and the corresponding tensioning strip (22) that are close to each other are both vertical surfaces.

3. The target fixture for bulletproof fabric testing according to claim 2, characterized in that: The sides of the abutment strip (23) and the corresponding tensioning strip (22) that are close to each other are both friction surfaces.

4. The target fixture for bulletproof fabric testing according to claim 1, characterized in that: Each of the self-locking clamps (2) has two lower pressing strips (21) and two first fasteners (24), and the two lower pressing strips (21) correspond to the two first fasteners (24) one by one. Each of the lower pressing strips (21) is placed at both ends of the corresponding tensioning strip (22), and is connected to the bottom plate (1) through the corresponding first fasteners (24) and pressed down on the first slope surface (221) of the corresponding tensioning strip (22).

5. The target fixture for bulletproof fabric testing according to any one of claims 1 to 4, characterized in that: Four self-locking clamps (2) are provided, and the four abutment strips (23) are enclosed in a rectangle and are integrally formed with the bottom plate (1).

6. The target fixture for bulletproof fabric testing according to any one of claims 1 to 4, characterized in that: The first fastener (24) includes a screw (243) and a first nut (242), each of the lower pressure strips (21) is provided with a first through hole (212) running through the upper and lower parts, and the screw (243) is vertically arranged at the upper end of the bottom plate (1) and aligned with the corresponding first through hole (212), the upper end of each screw (243) passes through the corresponding first through hole (212) and is threadedly connected to the first nut (242) to press the corresponding lower pressure strip (21) onto the corresponding tensioning strip (22).

7. The target fixture for bulletproof fabric testing according to any one of claims 1 to 4, characterized in that: The invention also includes an upper splint (4), which is annular, and its outer edge is consistent with the shape of the plurality of abutment strips (23), and the inner hole of the upper splint (4) is aligned with the inner hole of the bottom plate (1). A connecting ear (41) is provided at each corner of the outer edge of the upper splint (4). The upper splint (4) is horizontally placed on the plurality of abutment strips (23), and each side of its outer edge is aligned with any one of the abutment strips (23). Each connecting ear (41) is connected to the bottom plate (1) by a second fastener (42) to clamp the bulletproof fabric (3) between it and the abutment strip (23).

8. The target fixture for bulletproof fabric testing according to claim 7, characterized in that: The second fastener (42) includes a second bolt (421) and a second nut (422), each of the connecting ears (41) is provided with a third through hole (411) extending vertically therethrough, and a fourth through hole (12) extending vertically therethrough is provided at a position of the base plate (1) corresponding to the third through hole (411), each of the third through holes (411) is aligned with the corresponding fourth through hole (12) and a second bolt (421) is inserted therein, and a threaded end of the second bolt (421) is threadedly connected to at least one second nut (422) to press the upper clamp (4) onto the plurality of abutment bars (23).

Citation Information

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