Screen tensioning device

Abstract

The utility model relates to a screen tensioning device which comprises a power device. A console; the external expansion piece is rotationally arranged on the operation table; the clamping plate is movably arranged on the extension piece; wherein the mesh cloth penetrates through the space between the extension piece and the clamping plate; an extension part is arranged on the extension piece; the external expansion piece and the clamping plate clamp the mesh cloth, the power device drives the external expansion piece to rotate, the external expansion piece pulls the mesh cloth outwards, and the extension part is contacted with the mesh cloth. The problems that in an existing scheme, net cloth pulling stress is not uniform, and wrinkles are generated after the net cloth is pulled are solved.

Description

Technical Field

[0001] The utility model relates to the field of tensioning devices, in particular to a screen tensioning device. Background Art

[0002] The first step in screen production is to securely attach the mesh to the frame. This process involves placing the frame on a table and then placing the mesh over it. A pneumatically driven clamp first grips one side of the mesh. The mesh is then manually tensioned, and the plywood is then clamped on the other side by the plywood.

[0003] Since the mesh is tightened by manual pulling, the mesh is unevenly stressed when pulled, and wrinkles will appear after the mesh is pulled, thus affecting the quality of the screen.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a screen tensioning device to solve the problem in the prior art that the mesh is unevenly stressed when pulled and wrinkles are generated after the mesh is pulled.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A screen tensioning device;

[0008] It includes: a power device; an operating table; an external member, rotatably arranged on the operating table; a clamping plate, movably arranged on the external member; wherein the mesh passes between the external member and the clamping plate; an extension portion is provided on the external member; the external member and the clamping plate clamp the mesh, the power device drives the external member to rotate, the external member pulls the mesh outward, and the extension portion contacts the mesh.

[0009] A further technical solution is that a first tooth shape is provided on the outer member; a second tooth shape is provided on the clamping plate; the first tooth shape and the second tooth shape are meshed with each other, and the net is arranged between the first tooth shape and the second tooth shape.

[0010] A further technical solution is that the first tooth-shaped material is rubber; and the second tooth-shaped material is metal.

[0011] A further technical solution is that the first tooth-shaped position on the outer expansion member is provided as an outwardly protruding curved surface; the surface of the extension portion is a plane; and the outer expansion member and the extension portion transition in a circular arc.

[0012] A further technical solution is that a mounting portion is provided on one end of the external member away from the extension portion; an avoidance position is provided on the mounting portion; the mesh passes through the avoidance position; and the clamping plate is slidably provided on the mounting portion.

[0013] A further technical solution is that a sliding block is provided on the clamping plate; a first gear and a hand wheel are rotatably provided on the mounting portion; the first gear is coaxially connected to the hand wheel; and the first gear meshes with the sliding block.

[0014] A further technical solution is that a fork block is slidably arranged on the mounting portion; an adjusting piece is threadedly connected to the mounting portion; an elastic device is sleeved on the fork block; the adjusting piece pushes the fork block to insert into the first gear; and the elastic device pushes the fork block away from the first gear.

[0015] A further technical solution is that a second gear is provided at the driving end of the power device; a third gear is provided at the rotation position of the external member; and the second gear is engaged with the third gear.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) the clamping plate moves along the outer stretching member to clamp the mesh, the power device drives the outer stretching member to rotate, the outer stretching member and the clamping plate pull the mesh outward, and the mesh is in a tensioned state; after the outer stretching member continues to rotate, the extension part contacts the lower surface of the mesh, and the extension part extends the mesh, so that the mesh becomes a plane after tensioning, avoiding wrinkles on the mesh and ensuring the quality of the screen.

[0017] (2) When the outer stretching member and the clamping plate clamp the mesh, the first tooth shape and the second tooth shape engage with each other, thereby increasing the contact area between the mesh, the outer stretching member and the clamping plate, so that the outer stretching member and the clamping plate can clamp the mesh and prevent the mesh from loosening.

[0018] (3) A large clamping force is generated between the first tooth shape and the second tooth shape, so that the first tooth shape and the second tooth shape fit tightly together. Since one side of the mesh is made of soft material and does not crush the mesh, the mesh will not tear after being pulled.

[0019] (4) After the outer stretching member and the clamping plate clamp the mesh, the fork block is embedded in the first gear to restrict the clamping plate to prevent the clamping from loosening; when the outer stretching member and the clamping plate need to loosen the mesh, only the adjustment member needs to be rotated to release the restriction of the clamping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure shows a structural diagram of a screen tensioning device according to an embodiment of the present invention.

[0021] Figure 2 Shown Figure 1 Enlarged structural diagram at point A in the middle.

[0022] Figure 3 A bottom view of the first gear position of an embodiment of the present utility model is shown.

[0023] Markings in the accompanying drawings: 1. Operating table; 2. External member; 21. Extension portion; 22. First tooth profile; 23. Mounting portion; 24. Avoidance position; 25. First gear; 26. Handwheel; 27. Fork block; 28. Adjustment member; 29. ​​Elastic device; 3. Clamping plate; 31. Second tooth profile; 32. Sliding block; 4. Power device; 41. Second gear; 42. Third gear. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the device proposed in the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0025] Figure 1 The figure shows a structural diagram of a screen tensioning device according to an embodiment of the present invention. Figure 2 Shown Figure 1 Enlarged structural diagram at point A in the middle. Figure 3 The bottom view of the first gear position of the embodiment of the present invention is shown. Figure 1-Figure 3 As shown, the utility model discloses a screen tensioning device.

[0026] The screen tensioning device comprises: an operating table 1 , an external tensioning member 2 rotatably arranged on the operating table 1 , a clamping plate 3 movably arranged on the external tensioning member 2 , and a power device 4 arranged on the operating table 1 .

[0027] The mesh passes through the outer member 2 and the clamping plate 3. The outer member 2 is provided with an extension portion 21. The outer member 2 and the clamping plate 3 clamp the mesh. The power device 4 drives the outer member 2 to rotate, and the outer member 2 pulls the mesh outward, and the extension portion 21 contacts the mesh.

[0028] The printing plate frame is placed on the operating table 1, and then the screen cloth is covered on the printing plate frame. The outer frame 2 is rotatably mounted around the operating table 1. The screen cloth passes between the outer frame 2 and the clamping plate 3. An extension 21 is provided on the outer frame 2 near the printing plate frame.

[0029] The clamping plate 3 moves along the outer member 2 to clamp the mesh. The power unit 4 drives the outer member 2 to rotate. The outer member 2 and the clamping plate 3 pull the mesh outward, putting the mesh into a tensioned state. As the outer member 2 continues to rotate, the extension 21 contacts the lower surface of the mesh, stretching it and making it flat after tensioning. This prevents wrinkles and ensures the quality of the screen.

[0030] A first tooth shape 22 is provided on the outer member 2 near the clamping plate 3. A second tooth shape 31 is provided on the clamping plate 3 near the outer member 2. The first tooth shape 22 and the second tooth shape 31 are meshed with each other, and the mesh is arranged between the first tooth shape 22 and the second tooth shape 31.

[0031] When the outer member 2 and the clamping plate 3 clamp the mesh, the first tooth shape 22 and the second tooth shape 31 engage with each other, thereby increasing the contact area of ​​the mesh, the outer member 2 and the clamping plate 3, so that the outer member 2 and the clamping plate 3 can clamp the mesh to prevent the mesh from loosening.

[0032] The first tooth shape 22 is made of rubber, and the second tooth shape 31 is made of metal.

[0033] After the outer member 2 and the clamping plate 3 clamp the mesh, the outer member 2 rotates to stretch the mesh, which will generate a large tensile force and the mesh will be loosened from between the first tooth shape 22 and the second tooth shape 31 or cause the mesh to tear.

[0034] When both the first tooth shape 22 and the second tooth shape 31 are made of soft materials, the clamping force of the outer member 2 and the clamping plate 3 is small, and the mesh is easy to loosen. When both the first tooth shape 22 and the second tooth shape 31 are made of hard materials, the mesh will be crushed, and the mesh will be torn after being pulled.

[0035] Rubber is a soft material, and metal is a hard material. In this application, the first tooth shape 22 is made of a soft material, and the second tooth shape 31 is made of a hard material. A large clamping force is generated between the first tooth shape 22 and the second tooth shape 31, so that the first tooth shape 22 and the second tooth shape 31 fit tightly together. Since one side of the mesh is made of a soft material, the mesh will not be crushed, and the mesh will not tear after being pulled.

[0036] The first tooth shape 22 is provided on the outer member 2 as an outwardly convex curved surface. The surface of the extension portion 21 is a flat surface. The outer member 2 and the extension portion 21 transition in a circular arc.

[0037] The curved surface of the outer member 2 is arc-shaped, which increases the contact area between the mesh, the outer member 2, and the clamping plate 3. When the extension 21 contacts the mesh, the extension 21 and the mesh are in surface contact, and the extension 21 can flatten and extend the wrinkles of the mesh.

[0038] The outer member 2 is provided with a mounting portion 23 at one end away from the extension portion 21. The mounting portion 23 is provided with an escape portion 24 which passes through the mounting portion 23. The mesh passes through the escape portion 24.

[0039] The clamping plate 3 is slidably mounted on the mounting portion 23. A sliding block 32 is mounted on the clamping plate 3. A first gear 25 and a hand wheel 26 are rotatably mounted on the mounting portion 23. The first gear 25 is coaxially connected to the hand wheel 26. The first gear 25 engages with the sliding block 32.

[0040] The sliding block 32 is slidably mounted on the mounting portion 23. The hand wheel 26 is rotated, which drives the first gear 25 to rotate. The first gear 25 drives the sliding block 32 and the clamping plate 3 to move. The clamping plate 3 approaches the outer member 2 to clamp the mesh, and moves away from the outer member 2 to release the mesh.

[0041] A fork block 27 is slidably mounted on the mounting portion 23. An adjusting member 28 is threadedly connected to the mounting portion 23. The adjusting member 28 and the fork block 27 are perpendicular to each other. An elastic device 29 is sleeved on the fork block 27. Exemplarily, the elastic device 29 is a spring. The adjusting member 28 pushes the fork block 27 into the first gear 25. The elastic device 29 pushes the fork block 27 away from the first gear 25. The fork block 27 has an inclined surface near the adjusting member 28, and the adjusting member 28 also has a conical surface near the fork block 27, and the conical surface and the inclined surface fit together.

[0042] The adjusting member 28 is screwed in, and the adjusting member 28 pushes the fork block 27 to move and embed between the teeth of the first gear 25. The adjusting member 28 is screwed out, and the elastic device 29 pushes the fork block 27 away from the first gear 25.

[0043] After the outer member 2 and the clamping plate 3 clamp the mesh, the fork 27 engages the first gear 25, restraining the clamping plate 3 to prevent loosening. To release the mesh, simply rotate the adjustment member 28 to release the clamping plate 3.

[0044] Exemplarily, the power unit 4 is a servo motor. A second gear 41 is provided at the drive end of the power unit 4. A third gear 42 is provided at the rotational position of the outer member 2. The engagement of the second gear 41 with the third gear 42 transmits the driving force of the power unit 4 to the outer member 2, allowing the outer member 2 to rotate smoothly.

[0045] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A screen tensioning device, characterized in that: include: Power plant (4); Operation table (1); An external expansion member (2) is rotatably arranged on the operating table (1); A clamping plate (3) movably arranged on the outer member (2); The mesh cloth passes between the outer member (2) and the clamping plate (3); an extension portion (21) is provided on the outer member (2); the outer member (2) and the clamping plate (3) clamp the mesh cloth, the power device (4) drives the outer member (2) to rotate, the outer member (2) pulls the mesh cloth outward, and the extension portion (21) contacts the mesh cloth.

2. The screen tensioning device according to claim 1, characterized in that: The outer member (2) is provided with a first tooth shape (22); the clamping plate (3) is provided with a second tooth shape (31); the first tooth shape (22) and the second tooth shape (31) are meshed with each other, and the net is arranged between the first tooth shape (22) and the second tooth shape (31).

3. The screen tensioning device according to claim 2, characterized in that: The material of the first tooth shape (22) is rubber; the material of the second tooth shape (31) is metal.

4. The screen tensioning device according to claim 2, characterized in that: The position of the first tooth shape (22) arranged on the outer expansion member (2) is a curved surface protruding outward; the surface of the extension portion (21) is a plane; and the outer expansion member (2) and the extension portion (21) are in an arc transition.

5. The screen tensioning device according to claim 1, characterized in that: A mounting portion (23) is provided on one end of the outer member (2) away from the extending portion (21); an escape position (24) is provided on the mounting portion (23); the mesh passes through the escape position (24); and the clamping plate (3) is slidably disposed on the mounting portion (23).

6. The screen tensioning device according to claim 5, characterized in that: A sliding block (32) is arranged on the clamping plate (3); a first gear (25) and a hand wheel (26) are rotatably arranged on the mounting portion (23); the first gear (25) is coaxially connected to the hand wheel (26); and the first gear (25) meshes with the sliding block (32).

7. The screen tensioning device according to claim 6, characterized in that: A fork block (27) is slidably arranged on the mounting portion (23); an adjusting member (28) is threadedly connected to the mounting portion (23); an elastic device (29) is sleeved on the fork block (27); the adjusting member (28) pushes the fork block (27) to be inserted into the first gear (25); and the elastic device (29) pushes the fork block (27) away from the first gear (25).

8. The screen tensioning device according to claim 1, characterized in that: A second gear (41) is provided at the driving end of the power device (4); a third gear (42) is provided at the rotational position of the outer member (2); and the second gear (41) meshes with the third gear (42).

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