Fixing clamp for paper testing

Abstract

The utility model discloses a fixing clamp for paper testing, which relates to the technical field of paper testing and comprises a testing base, sliding rods are arranged at the front end and the rear end of the upper end in the testing base, and mounting blocks are slidably connected to the left end and the right end of each sliding rod. A first sliding groove is formed in the side, close to the vertical central axis of the testing base, of the upper end of the mounting block, a sliding column is slidably connected into the first sliding groove, and a threaded rod is in threaded connection with the side, away from the vertical central axis of the testing base, of the interior of the sliding column. According to the fixing clamp for paper testing, the threaded rod drives the sliding column to move in the first sliding groove and the sliding rod slides in the second sliding groove, so that the clamp shell can move in the transverse direction and the longitudinal direction, the corner positions of clamped paper can be adjusted conveniently, it is guaranteed that the two sides of the paper are equal, and the paper testing efficiency is improved. Therefore, the effect of uniform stress in the tensile resistance test of the paper is realized, and the accuracy of numerical values is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of paper testing, in particular to a fixing fixture for paper testing. Background Art

[0002] Paper is one of the four great inventions of ancient China. It has played a huge role in promoting the development of Chinese and world civilizations. With the progress of society and the development of science and technology, the production and use of paper are becoming more and more extensive. After its production and use, corresponding paper tests are needed to reflect whether the paper meets the standards. Tensile test is one of them. It mainly detects the tensile force value by clamping the two ends of the paper and pulling them in opposite directions.

[0003] The patent document with application number CN202320450285.3 discloses a paper fixing clamp, comprising a base plate, the top of the base plate is snap-connected with a top cover, two ends of the base plate are respectively provided with a fixing hole and a mounting groove, the side of the mounting groove close to the fixing hole is fixedly connected with a base, the end of the base away from the fixing hole is fixedly connected with an electric telescopic rod, the other end of the electric telescopic rod is fixedly connected with a movable plate through a connecting block and a spring, both sides of the movable plate are fixedly connected with protective pads, the bottom of the base is located at both sides of the mounting groove and is respectively fixedly connected with a first fixing plate and a second fixing plate, the provision of the protective pad in the improved utility model facilitates better protection of paper, the provision of the base facilitates better limiting the electric telescopic rod, the provision of the spring groove facilitates better limiting the spring, and the provision of the blind hole facilitates better limiting the electric telescopic rod and the connecting block, so as to better protect the spring.

[0004] Although the above-mentioned comparative document improves the protective effect of the clamp on paper, it is easy to install it in an offset position when installing soft paper, resulting in uneven force in the tensile test. The taut side of the paper will crack first, thereby affecting the tensile strength value finally tested by the tester. To address the above problems, we have launched a fixed clamp for paper testing. Utility Model Content

[0005] The utility model discloses a fixing fixture for paper testing, which solves the technical problem that uneven pulling force on paper affects the test value.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fixing fixture for paper testing comprises a test base, wherein sliding rods are arranged at the front and rear ends of the upper end of the test base, the left and right ends of the sliding rods are slidably connected with mounting blocks, a first sliding groove is provided on the side of the upper end of the mounting block close to the vertical central axis of the test base, a sliding column is slidably connected inside the first sliding groove, a threaded rod is threadedly connected on the side of the sliding column away from the vertical central axis of the test base, a second sliding groove is provided at one end of the sliding column close to the vertical central axis of the test base, the sliding rod is slidably connected inside the second sliding groove, and a fixing screw is threadedly connected to the upper end of the sliding column.

[0008] In a preferred solution, a limiting groove is provided at the lower end of the first sliding groove, and a limiting block is fixedly connected to the lower end of the sliding column. By setting the limiting groove and the sliding column, it is ensured that during the process of the threaded rod transmitting the sliding column, the sliding column and the threaded rod are prevented from rotating synchronously.

[0009] In a preferred solution, a clamp shell is connected to one side of the connecting rod close to the vertical central axis of the test base, and a first adjusting rod and a second adjusting rod are respectively threadedly connected to the upper end of the clamp shell, a first extrusion plate is connected to the lower end bearing of the first adjusting rod, and a second extrusion plate is connected to the lower end bearing of the second adjusting rod. By setting the first extrusion plate and the second extrusion plate and individually controlling the first adjusting rod and the second adjusting rod, it is convenient to clamp the corners of the paper once, clamp them twice, and clamp them in sections to adjust the position of the paper.

[0010] In a preferred solution, rubber pads are provided at the lower end of the inner part of the clamp housing and the lower ends of the first extrusion sheet and the second extrusion sheet. By providing the rubber pads, the protection of the paper is improved and the phenomenon of paper clamping is reduced.

[0011] In a preferred solution, the clamp housing is slidably connected to the second slide groove via a slide rod, the groove, the connecting rod, and the slide rod and the connecting rod are provided so as to realize movement of the clamp housing at the position of the slide column, thereby facilitating adjustment of the clamping position of the paper.

[0012] The utility model provides a paper testing fixture through improvement, which has the following improvements and advantages compared with the prior art:

[0013] One: A fixed fixture for paper testing, in which a threaded rod drives a sliding column to move in a first slide groove, and the sliding rod slides inside a second slide groove, so that the fixture shell can move horizontally and vertically, thereby facilitating the adjustment of the corner positions of the clamped paper, ensuring that both sides of the paper are equal, thereby achieving a uniform force effect in the paper tensile test and improving the accuracy of the numerical value.

[0014] Second: A fixed fixture for paper testing, which is provided with a first squeezing plate and a second squeezing plate, and is individually controlled by a first adjusting rod and a second adjusting rod, so as to facilitate the primary clamping and secondary clamping of the corners of the paper, and realize segmented clamping, so that the position of the paper can be adjusted after the primary clamping, ensuring that the paper is in a uniform force state before performing a secondary complete clamping. At the same time, a rubber pad is provided to improve the protection of the paper and reduce the phenomenon of paper clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a fixing fixture for paper testing proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a fixture shell of a paper testing fixing fixture proposed by the utility model;

[0017] Figure 3 The utility model is a schematic diagram of a sliding column structure of a fixing fixture for paper testing.

[0018] In the attached drawings: 1. test base; 2. sliding rod; 3. mounting block; 4. sliding column; 5. first slide groove; 6. threaded rod; 7. second slide groove; 8. sliding rod; 9. fixing screw; 10. groove; 11. connecting rod; 12. limit block; 13. limit groove; 14. fixture housing; 15. first adjusting rod; 16. first extrusion sheet; 17. second adjusting rod; 18. second extrusion sheet; 19. rubber pad. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] The utility model discloses a fixing fixture for paper testing, which is mainly used for installing and clamping paper before testing.

[0022] Reference Figure 1 and Figure 3, a fixing fixture for paper testing comprises a test base 1, a sliding rod 2 is arranged at the front and rear ends of the upper end of the test base 1, and the left and right ends of the sliding rod 2 are slidably connected with mounting blocks 3, a first sliding groove 5 is provided on the side of the upper end of the mounting block 3 close to the vertical central axis of the test base 1, a sliding column 4 is slidably connected inside the first sliding groove 5, a threaded rod 6 is threadedly connected on the side of the sliding column 4 away from the vertical central axis of the test base 1, a second sliding groove 7 is provided at one end of the sliding column 4 close to the vertical central axis of the test base 1, a sliding rod 8 is slidably connected inside the second sliding groove 7, a fixing screw 9 is threadedly connected to the upper end of the sliding column 4, a limiting groove 13 is provided at the lower end of the first sliding groove 5, a limiting block 12 is fixedly connected to the lower end of the sliding column 4, a groove 10 is provided on the side of the sliding column 4 close to the vertical central axis of the test base 1, a connecting rod 11 is slidably arranged inside the groove 10, and a fixture housing 14 is slidably connected to the second sliding groove 7 through the sliding rod 8, the groove 10 and the connecting rod 11;

[0023] In this embodiment, when it is necessary to perform a tensile test on the paper, the four sides of the paper are first clamped by the first extrusion sheet 16 on the clamp housing 14. Due to the high flexibility of soft paper, the clamping process causes the paper to be clamped unevenly, and the sizes of the front and rear ends of the paper are different. When the tensile test process is performed, one side of the paper is taut and the other side is in a relaxed state, resulting in uneven force, which leads to a numerical error in the tensile force. At that time, it is observed which part of the four sides of the paper is in a relaxed state, and the sliding column 4 can be driven to move in the first slide groove 5 by rotating the threaded rod 6, so that the sliding column 4 drives the clamp housing 14 to move synchronously through the connecting rod 11, thereby realizing the lateral left and right displacement of the clamp housing 14, which is convenient for adjusting the position of a corner of the paper clamped on the clamp housing 14. Adjustment is performed to ensure that the front and rear sides of the paper can be tensioned at the same time, and the tension force point is at the center of the paper. After the lateral position is adjusted, the paper will be displaced laterally, causing the left and right sides to loosen. At that time, the fixing screw 9 is rotated to loosen the fixing screw 9 to the slide bar 8, and the slide bar 8 is moved in the second slide groove 7 by the connecting rod 11 to synchronously drive the clamp housing 14 to move longitudinally, thereby ensuring that the left and right sides of the paper are slightly tensioned. After the adjustment is completed, the fixing screw 9 is rotated to move downward against the slide bar 8, thereby fixing the position of the clamp housing 14. Therefore, the installation status of the paper is observed by the facts, and the corresponding lateral and longitudinal position adjustments are made to ensure that the paper is evenly stressed and the force point is at the center of the paper, thereby improving the accuracy of the final value of the tension test.

[0024] In the above solution, the position of the clamp housing 14 needs to be adjusted. Considering that it is inconvenient to adjust the position after one side of the paper is fully clamped, the specific operation is as follows:

[0025] Reference Figure 1 and Figure 2In a preferred embodiment, a fixture housing 14 is connected to one side of the connecting rod 11 close to the vertical central axis of the test base 1, and a first adjusting rod 15 and a second adjusting rod 17 are respectively threadedly connected to the upper end of the fixture housing 14, a first extrusion sheet 16 is connected to the lower end of the first adjusting rod 15 by a bearing, and a second extrusion sheet 18 is connected to the lower end of the second adjusting rod 17 by a bearing, and a rubber pad 19 is provided at the lower end of the interior of the fixture housing 14 and the lower ends of the first extrusion sheet 16 and the second extrusion sheet 18;

[0026] In this embodiment, before the position of the paper is adjusted, the first extrusion sheet 16 is driven to clamp the corners of the paper by rotating the first adjustment rod 15. After the position of the paper is adjusted, the second extrusion sheet 18 is driven to move downward by rotating the second adjustment rod 17 to clamp the left and right sides of the paper for a second time. If the tensile test is only performed by clamping the corners of the paper, it is easy to cause the corners to be subjected to excessive force and tear quickly. Therefore, the first extrusion sheet 16 and the second extrusion sheet 18 clamp the left and right sides of the paper over a large area, thereby improving the accuracy of the paper test. At the same time, rubber pads 19 are arranged at the lower ends of the first extrusion sheet 16 and the second extrusion sheet 18. The upper and lower groups of rubber pads 19 clamp the paper to improve the protection of the paper and reduce the damage to the paper caused by the metal clamping.

[0027] Working principle: When in use, when it is necessary to perform a tensile test on the paper, first clamp the four sides of the paper through the first extrusion piece 16 on the clamp shell 14. Due to the high flexibility of soft paper, the clamping process causes uneven clamping of the paper, and the sizes of the front and back ends of the paper are different. When the tensile test process is carried out, one side of the paper is taut and the other side is in a relaxed state, resulting in uneven force, resulting in a numerical error in the tensile force. At that time, observe which part of the four sides of the paper is in a relaxed state, and then drive the sliding column 4 to move in the first slide groove 5 by rotating the threaded rod 6, so that the sliding column 4 drives the clamp shell 14 to move synchronously through the connecting rod 11, thereby realizing the lateral left and right displacement of the clamp shell 14, which is convenient for adjusting the position of a corner of the paper clamped on the clamp shell 14 The position is adjusted to ensure that the front and rear sides of the paper can be tensioned at the same time, and the tension force point is at the center of the paper. After the lateral position is adjusted, the paper will be displaced laterally, causing the left and right sides to loosen. At that time, the fixing screw 9 is rotated to loosen the fixing screw 9 to the slide bar 8, and the slide bar 8 is moved in the second slide groove 7 by the connecting rod 11 to synchronously drive the clamp housing 14 to move longitudinally, thereby ensuring that the left and right sides of the paper are slightly tensioned. After the adjustment is completed, the fixing screw 9 is rotated to move downward against the slide bar 8, thereby fixing the position of the clamp housing 14. Therefore, the installation status of the paper is observed by the facts, and the corresponding lateral and longitudinal position adjustments are made to ensure that the paper is evenly stressed and the force point is at the center of the paper, thereby improving the accuracy of the final value of the tension test.

[0028] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. The replacement can be a replacement of part of the structure, device, method step, or a complete technical solution. Equivalent replacement or change based on the technical solution of the utility model and its utility model concept should be included in the protection scope of the utility model.

Claims

1. A paper testing fixture, comprising a test base (1), characterized in that: The front and rear ends of the upper end of the test base (1) are provided with sliding rods (2), the left and right ends of the sliding rod (2) are slidably connected with mounting blocks (3), the upper end of the mounting block (3) is provided with a first sliding groove (5) on the side close to the vertical center axis of the test base (1), a sliding column (4) is slidably connected inside the first sliding groove (5), a threaded rod (6) is threadedly connected inside the sliding column (4) on the side away from the vertical center axis of the test base (1), a second sliding groove (7) is provided at one end of the sliding column (4) close to the vertical center axis of the test base (1), a sliding rod (8) is slidably connected inside the second sliding groove (7), and a fixing screw (9) is threadedly connected to the upper end of the sliding column (4).

2. A paper testing fixture according to claim 1, characterized in that: A limiting groove (13) is provided at the lower end of the first sliding groove (5), and a limiting block (12) is fixedly connected to the lower end of the sliding column (4).

3. A paper testing fixture according to claim 1, characterized in that: A groove (10) is provided inside the sliding column (4) on one side close to the vertical center axis of the test base (1), and a connecting rod (11) is slidably arranged inside the groove (10).

4. A paper testing fixture according to claim 3, characterized in that: A fixture housing (14) is connected to one side of the connecting rod (11) close to the vertical center axis of the test base (1), and a first adjustment rod (15) and a second adjustment rod (17) are respectively threadedly connected to the upper end of the fixture housing (14).

5. A paper testing fixture according to claim 4, characterized in that: The lower end bearing of the first adjusting rod (15) is connected to a first extrusion sheet (16), and the lower end bearing of the second adjusting rod (17) is connected to a second extrusion sheet (18).

6. A paper testing fixture according to claim 5, characterized in that: The lower end of the interior of the clamp housing (14) and the lower ends of the first extrusion sheet (16) and the second extrusion sheet (18) are all provided with rubber pads (19).

7. A paper testing fixture according to claim 4, characterized in that: The clamp housing (14) is slidably connected to the second sliding groove (7) via a sliding rod (8), the groove (10) and the connecting rod (11).

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