Paper pressing device with adjustable pressing force

Abstract

This utility model relates to the field of paper press technology and discloses a paper press with adjustable pressing force, including a positioning frame and a base plate installed at its bottom. A bracket is installed on the side wall of the positioning frame, and a positioning sleeve is installed on the bracket. A pressure rod is slidably arranged on the side wall of the positioning sleeve, and a pressure plate is installed at the bottom of the pressure rod. This utility model adjusts the pressure by combining compressed gas with a mechanical structure. The gas has good fluidity and compressibility. When the second piston pressurizes or depressurizes the compression chamber, the gas can uniformly transmit the pressure to the first piston, making the force of the pressure plate on the paper more stable and avoiding the pressure fluctuations that may occur in traditional pure mechanical adjustment. Moreover, the continuous compressibility of the gas allows the pressure adjustment to achieve stepless changes over a large range. Compared with step adjustment methods such as snap-on type, it can more accurately match the subtle pressure requirements of different papers, avoiding damage to thin paper due to excessive pressure, and ensuring that thick paper or multiple sheets of paper are stably pressed.

Description

Technical Field

[0001] This utility model belongs to the field of paper presser technology, specifically, it relates to a paper presser with adjustable pressing force. Background Technology

[0002] In many paper handling scenarios, such as office document organization, printing and typesetting, and handmade paper products, paper presses are commonly used tools. Their function is to stabilize the paper, prevent it from shifting during operation, and ensure the smooth progress of subsequent processes.

[0003] Most paper pressurers nowadays use purely mechanical adjustment structures (such as screw tightening and buckle positioning) that rely on rigid components to transmit pressure. Uneven force is prone to occur during adjustment, resulting in large local pressure fluctuations on the paper. This may cause pattern defects in high-precision printing and other scenarios. At the same time, step adjustment methods such as buckle type have limited adjustment levels and insufficient adjustment precision, which cannot meet the paper's subtle pressure requirements. For example, it is difficult to find the ideal pressure value when processing multi-layered paper or paper with special textures.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] An adjustable paper presser includes a positioning frame and a base plate mounted on its bottom.

[0007] A bracket is installed on the side wall of the positioning frame, a positioning sleeve is installed on the bracket, a pressure rod is slidably arranged on the side wall of the positioning sleeve, a pressure plate is installed at the bottom of the pressure rod and the pressure plate corresponds to the base plate, and a first piston is installed at the top of the pressure rod. The first piston slides in the compression cavity opened in the inner wall of the positioning sleeve.

[0008] A connecting sleeve is inserted into the positioning sleeve, and a second piston is installed at the bottom of the connecting sleeve. The second piston is slidably disposed in the compression chamber. A threaded rod is rotatably installed on the connecting sleeve, and the threaded rod is screwed into the positioning frame. The threaded rod is used to drive the second piston to move down and cooperate with the first piston to pressurize the compression chamber, thereby changing the paper pressing force.

[0009] In a preferred embodiment of this utility model, the positioning frame is arched, a reinforcing plate is installed at the bend of the positioning frame, the reinforcing plate is triangular, and a plurality of friction grooves are formed on the surface of the substrate.

[0010] In a preferred embodiment of this utility model, a baffle is installed inside the positioning sleeve, a baffle is installed on the end face of the first piston, and a positioning spring is provided on the baffle and the baffle. The compression direction of the positioning spring is on the same straight line as the axis of the positioning sleeve.

[0011] In a preferred embodiment of this utility model, one end of the positioning spring is engaged with the bottom of the baffle, the baffle has an inner groove, and the other end of the positioning spring is engaged with the inner groove.

[0012] In a preferred embodiment of this utility model, a plum blossom knob is installed on the top of the threaded rod, and an anti-slip sleeve is fitted onto the surface of the plum blossom knob.

[0013] In a preferred embodiment of this utility model, a sliding plate is installed on the second piston, and a plurality of pairs of limiting rods are installed on the sliding plate. The plurality of pairs of limiting rods are movably inserted into the side wall of the positioning sleeve. A limiting plate is installed on the top of the limiting rod, and the cross-sectional area of ​​the limiting plate is larger than the cross-sectional area of ​​the limiting rod.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention regulates pressure through a combination of compressed gas and a mechanical structure. The gas has excellent fluidity and compressibility. When the second piston pressurizes or depressurizes the compression chamber, the gas can uniformly transmit pressure to the first piston, making the force exerted by the pressure plate on the paper more stable and avoiding pressure fluctuations that may occur with traditional purely mechanical adjustments. Furthermore, the continuous compressibility of the gas allows for stepless pressure adjustment over a wide range. Compared to step adjustment methods such as snap-fit, this invention can more precisely match the subtle pressure requirements of different types of paper, preventing thin paper from being damaged by excessive pressure while ensuring that thick paper or multiple sheets of paper are stably compressed.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0019] Figure 2 This is a front view of the structure of this utility model;

[0020] Figure 3 This is a sectional view of the positioning sleeve of the present invention.

[0021] Figure 4 The structure of this utility model Figure 3 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Positioning frame; 2. Base plate; 3. Friction groove; 4. Reinforcing plate; 5. Positioning sleeve; 6. Bracket; 7. Pressure rod; 8. Pressure plate; 9. First piston; 10. Baffle; 11. Inner groove; 12. Positioning spring; 13. Cover plate; 14. Threaded rod; 15. Plum blossom knob; 16. Connecting sleeve; 17. Second piston; 18. Limiting rod; 19. Limiting plate; 20. Slide plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0024] like Figures 1 to 4 As shown, a paper presser with adjustable pressing force includes a positioning frame 1 and a base plate 2 mounted on its bottom.

[0025] A bracket 6 is installed on the side wall of the positioning frame 1, a positioning sleeve 5 is installed on the bracket 6, a pressure rod 7 is slidably arranged on the side wall of the positioning sleeve 5, a pressure plate 8 is installed at the bottom of the pressure rod 7 and the pressure plate 8 corresponds to the base plate 2, and a first piston 9 is installed at the top of the pressure rod 7. The first piston 9 slides in the compression cavity opened in the inner wall of the positioning sleeve 5.

[0026] A connecting sleeve 16 is inserted into the positioning sleeve 5. A second piston 17 is installed at the bottom of the connecting sleeve 16 and is slidably disposed in the compression chamber. A threaded rod 14 is rotatably installed on the connecting sleeve 16 and is screwed into the positioning frame 1. The threaded rod 14 is used to drive the second piston 17 to move down and cooperate with the first piston 9 to pressurize the compression chamber, thereby changing the paper pressing force. This structural design, which uses the piston and the compression chamber to cooperate, achieves uniform pressure transmission. Compared with the traditional rigid connection adjustment, it is more gentle and can reduce local damage to the paper.

[0027] like Figures 1 to 4 As shown, in a specific embodiment, the positioning frame 1 is arched, and a reinforcing plate 4 is installed at the bend of the positioning frame 1. The reinforcing plate 4 is triangular, and several pairs of friction grooves 3 are formed on the surface of the substrate 2. The arched positioning frame combined with the triangular reinforcing plate can significantly improve the load-bearing capacity and deformation resistance of the overall structure, while the friction grooves can increase the friction between the paper and the substrate, prevent the paper from sliding, and improve the stability of paper pressing.

[0028] like Figures 1 to 4As shown, furthermore, a baffle 13 is installed inside the positioning sleeve 5, and a baffle 10 is installed on the end face of the first piston 9. A positioning spring 12 is provided on both the baffle 10 and the baffle 13. The compression direction of the positioning spring 12 is collinear with the axis of the positioning sleeve 5. One end of the positioning spring 12 is engaged with the bottom of the baffle 13. An inner groove 11 is provided on the baffle 10, and the other end of the positioning spring 12 is engaged in the inner groove 11. This spring mounting structure ensures stable compression direction, reduces elasticity attenuation, and the engagement design between the inner groove and the baffle prevents the spring from falling off, extending the service life of the component.

[0029] like Figures 1 to 4 As shown, a swivel knob 15 is further mounted on the top of the threaded rod 14, and an anti-slip sleeve is fitted onto the surface of the swivel knob 15. The swivel knob facilitates manual operation, and the anti-slip sleeve increases grip friction, preventing slippage during adjustment and improving ease of operation and comfort.

[0030] like Figures 1 to 4 As shown, a sliding plate 20 is further mounted on the second piston 17, and several pairs of limiting rods 18 are mounted on the sliding plate 20. The pairs of limiting rods 18 are movably inserted into the side wall of the positioning sleeve 5. A limiting plate 19 is mounted on the top of the limiting rod 18, and the cross-sectional area of ​​the limiting plate 19 is larger than that of the limiting rod 18. The limiting rods provide guidance for the movement of the second piston and prevent it from deviating or getting stuck. The limiting plate can prevent the limiting rods from falling out of the positioning sleeve and ensure the stability of the adjustment process.

[0031] The implementation principle of an adjustable paper pressure device in this embodiment is as follows:

[0032] In use, the paper to be pressed is placed on the base plate 2. The friction grooves 3 on the surface of the base plate 2 increase the friction between the paper and the base plate 2, preventing the paper from slipping during the pressing process. The positioning frame 1 has an arched design, which, together with the triangular reinforcing plate 4 at the bend, can improve the stability of the overall structure and provide a solid support for the paper pressing operation.

[0033] In the initial state, the positioning spring 12 is in a slightly compressed state. Its elastic force will push the baffle 10 to move the first piston 9 downward, and then push the pressure plate 8 closer to the base plate 2 through the pressure rod 7. At the same time, the elastic force of the positioning spring indirectly acts on the inside of the compression chamber, assisting the second piston 17 to maintain the initial position, so that the pressure plate 8 can initially contact the paper. The pre-tightening force of the positioning spring realizes the basic clamping of the paper, ensuring that the paper will not be displaced before the pressure is adjusted.

[0034] During subsequent pressure adjustment, if it is necessary to increase the paper pressing force, rotate the plum blossom knob 15 clockwise. The threaded rod 14 is pushed downward by the tightening action of the positioning frame 1, which drives the connecting sleeve 16 and the second piston 17 to move downward along the guide direction of the limiting rod 18. The internal space of the compression chamber is further compressed, and the air pressure increases. At this time, the increased air pressure will push the first piston 9 to continue to move downward over the elastic force of the positioning spring 12, which will increase the pressure of the pressure plate 8 on the paper. The positioning spring 12 is further compressed and stores more elastic potential energy, which together with the air pressure forms a greater clamping force.

[0035] To reduce the pressure on the paper, rotate the plum blossom knob 15 counterclockwise. The threaded rod 14 moves the second piston 17 upward, expanding the internal space of the compression chamber and reducing the air pressure. The elastic potential energy stored in the positioning spring 12 is released, pushing the baffle 10 and the first piston 9 upward. The pressure rod 7 then lifts the pressure plate 8 upward, reducing the pressure on the paper until the desired pressure is achieved. Through this coordinated adjustment of air pressure and spring force, continuous and precise control of the pressure can be achieved, meeting the needs of different paper handling scenarios.

Claims

1. A paper presser with adjustable pressing force, comprising a positioning frame (1) and a base plate (2) mounted on its bottom, characterized in that: The positioning frame (1) has a bracket (6) installed on its side wall, a positioning sleeve (5) installed on the bracket (6), a pressure rod (7) is slidably provided on the side wall of the positioning sleeve (5), a pressure plate (8) is installed at the bottom of the pressure rod (7), and the pressure plate (8) corresponds to the base plate (2), a first piston (9) is installed at the top of the pressure rod (7), and the first piston (9) slides in the compression cavity opened in the inner wall of the positioning sleeve (5); A connecting sleeve (16) is inserted into the positioning sleeve (5). A second piston (17) is installed at the bottom of the connecting sleeve (16) and is slidably disposed in the compression chamber. A threaded rod (14) is rotatably installed on the connecting sleeve (16) and is screwed into the positioning frame (1). The threaded rod (14) is used to drive the second piston (17) to move down and cooperate with the first piston (9) to pressurize the compression chamber, thereby changing the paper pressing force.

2. The paper presser with adjustable pressing force according to claim 1, characterized in that, The positioning frame (1) is arched, and a reinforcing plate (4) is installed at the bend of the positioning frame (1). The reinforcing plate (4) is triangular, and several pairs of friction grooves (3) are opened on the surface of the base plate (2).

3. The paper presser with adjustable pressing force according to claim 1, characterized in that, The positioning sleeve (5) is equipped with a baffle (13), and the end face of the first piston (9) is equipped with a baffle (10). The baffle (10) and the baffle (13) are provided with positioning springs (12), and the compression direction of the positioning springs (12) is on the same straight line as the axis of the positioning sleeve (5).

4. The paper presser with adjustable pressing force according to claim 3, characterized in that, One end of the positioning spring (12) is engaged at the bottom of the baffle (13), and the baffle (10) has an inner groove (11) and the other end of the positioning spring (12) is engaged in the inner groove (11).

5. The paper presser with adjustable pressing force according to claim 1, characterized in that, The top of the threaded rod (14) is fitted with a plum blossom knob (15), and the surface of the plum blossom knob (15) is fitted with an anti-slip sleeve.

6. The paper presser with adjustable pressing force according to claim 1, characterized in that, The second piston (17) is equipped with a sliding plate (20), and a number of limit rods (18) are installed on the sliding plate (20). The number of limit rods (18) are movably inserted into the side wall of the positioning sleeve (5). A limit plate (19) is installed on the top of the limit rod (18), and the cross-sectional area of ​​the limit plate (19) is larger than that of the limit rod (18).

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