Screen tension adjusting structure

Abstract

The screen tension adjusting structure comprises transverse rods, vertical rods and bolts, the two vertical rods are oppositely arranged, the two transverse rods are arranged at the two ends of the vertical rods, a square frame is defined by the transverse rods and the vertical rods, and a silk screen is arranged on one side of the square frame; round tables extending outwards in the length direction are arranged at the two ends of the vertical rod, threaded holes are formed in the centers of the round tables, through holes are formed in the portions, close to the ends of the vertical rod, of the transverse rod, and each through hole comprises a first section with the diameter corresponding to that of the corresponding round table and a second section with the diameter smaller than that of the corresponding round table. Bolts penetrate through the through holes and are screwed with the threaded holes to enable the cross rods and the vertical rods to be connected, the lengths, exposed between the cross rods and the vertical rods, of the circular truncated cones are adjustable according to the screwing lengths of the bolts, and the circular truncated cones are sleeved with gaskets with the thickness and the number optional. The screen tension adjusting structure is simple in structure and convenient to operate, the silk screen tension of the screen can be rapidly and instantly adjusted, and the quality of printed matter is kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing, in particular to a screen tension adjusting structure. Background Art

[0002] The adjustment of screen tension is crucial for screen printing quality. It affects the screen distance between the screen and the printing substrate, thereby affecting the accuracy and quality of the printed matter. Commonly, the screen is stretched on the screen frame and fixed as a whole. Once the screen is stretched, its tension is determined and cannot be changed. With the long-term use of the printing screen, the screen will gradually elongate, and the tension of the screen will inevitably become smaller accordingly. The stretched screen will become loose. When the screen tension is small to a certain extent, the printed pattern will become blurred and the required printing effect cannot be achieved. Moreover, due to the loosening of the screen, the printing quality cannot be maintained stably, and the screen plate can only be scrapped. Content of the Utility Model

[0003] Aiming at the above existing technical problems, the purpose of the utility model is to provide a screen tension adjusting structure to facilitate the adjustment of the tension of the screen.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A screen tension adjusting structure includes a cross bar, a vertical bar and a bolt. The two vertical bars are arranged oppositely, and the two cross bars are arranged at both ends of the vertical bars. The cross bar and the vertical bar enclose a square frame, and a screen is arranged on one side of the square frame; circular platforms extending outward along the length direction are arranged at both ends of the vertical bar, and threaded holes are arranged at the centers of the circular platforms. Through holes are arranged at the parts of the cross bar close to the ends of the vertical bar. The through holes include a first section with a diameter corresponding to the circular platform and a second section with a diameter smaller than the circular platform. The circular platform is inserted into the first section and slidably connected with the cross bar. The bolt passes through the through hole and is screwed with the threaded hole to connect the cross bar and the vertical bar. According to the screwing length of the bolt, the length of the circular platform exposed between the cross bar and the vertical bar is adjustable, and gaskets with selectable thickness and quantity are sleeved on the circular platform.

[0006] Preferably, the length of the circular platform is less than the length of the first section of the through hole, and a spring is sleeved on the bolt. The two ends of the spring respectively abut against the circular platform and the end face of the first section.

[0007] Preferably, notches are arranged at both inner ends of the vertical bar, guide grooves are arranged along the length direction at the bottom surfaces of the notches, inserting pieces are arranged on the cross bar and are fitted with the notches, and convex strips corresponding to the guide grooves are arranged on the inner sides of the inserting pieces.

[0008] Preferably, the screen is respectively adhesively connected with the cross bar and the vertical bar.

[0009] Preferably, a boss is provided on the side of the cross bar away from the vertical bar. An installation hole coaxial with the through hole is provided on the boss. The diameter of the installation hole is smaller than that of the through hole. The bolt sequentially passes through the installation hole and the through hole and is screwed into the threaded hole.

[0010] Preferably, the gasket is U-shaped.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] The screen tension adjusting structure of the utility model includes a cross bar, a vertical bar and a bolt. Two vertical bars are arranged oppositely. Two cross bars are arranged at both ends of the vertical bar. The cross bar and the vertical bar enclose a square frame. A wire mesh is arranged on one side of the square frame. Round platforms extending outward along the length direction are arranged at both ends of the vertical bar. A threaded hole is arranged at the center of the round platform. A through hole is arranged at the part of the cross bar close to the end of the vertical bar. The through hole includes a first section with a diameter corresponding to the round platform and a second section with a diameter smaller than the round platform. The round platform is inserted into the first section and is slidably connected with the cross bar. The bolt passes through the through hole and is screwed into the threaded hole to connect the cross bar and the vertical bar. The length of the round platform exposed between the cross bar and the vertical bar can be adjusted according to the screwing length of the bolt. Gaskets with selectable thickness and quantity are sleeved on the round platform. When the wire mesh is loose and the printing quality cannot be maintained, only need to loosen the bolt and pull it outwards. When the wire mesh is tightened to the appropriate tension, put a gasket with appropriate thickness on the exposed round platform, and then tighten the bolt, then the tension adjustment of the screen can be completed. The structure is simple and the operation is convenient. The screen tension of the screen can be adjusted quickly and immediately. Description of the Drawings

[0013] The technical solution of the utility model will be further described below with reference to the drawings:

[0014] Att Figure 1 is a perspective view of the screen tension adjusting structure of the utility model;

[0015] Att Figure 2 is a top view of the screen tension adjusting structure of the utility model;

[0016] Att Figure 3 is the A-A cross-sectional view of Att Figure 2 ;

[0017] Att Figure 4 is a partial structure schematic diagram of the screen tension adjusting structure of the utility model;

[0018] Att Figure 5 is the enlarged view of the part at B of Att Figure 3 ;

[0019] Wherein: 1. Cross bar; 11. Insert piece; 111. Convex strip; 2. Vertical bar; 21. Notch; 211. Guide groove; 3. Bolt; 4. Wire mesh; 5. Frustum; 6. Threaded hole; 7. Through hole; 71. First section; 72. Second section; 8. Gasket; 9. Spring; 10. Boss; 101. Mounting hole. Detailed implementation mode

[0020] The following describes in detail the preferred embodiments of the present invention with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] As shown in the attached Figure 1 、attached Figure 2 As shown in the figure, the screen tension adjusting structure of the present invention includes a cross bar 1, a vertical bar 2 and a bolt 3. The two vertical bars 2 are arranged oppositely, and the two cross bars 1 are connected to the two ends of the vertical bar 2. The cross bar 1 and the vertical bar 2 enclose a square frame, and a wire mesh 4 is installed on one side of the square frame. The wire mesh 4 is adhesively connected to the cross bar 1 and the vertical bar 2 respectively.

[0023] As shown in the attached Figure 4 As shown in the figure, both ends of the vertical bar 2 have frustums 5 extending outward along the length direction. A threaded hole 6 is machined at the center of the frustum 5. A through hole 7 is machined at the part of the cross bar 1 close to the end of the vertical bar 2. The through hole 7 includes a first section 71 with a diameter corresponding to the frustum 5 and a second section 72 with a diameter smaller than the frustum 5. The frustum 5 is inserted into the first section 71 and is slidably connected to the cross bar 1. The bolt 3 passes through the through hole 7 and is screwed with the threaded hole 6 to connect the cross bar 1 and the vertical bar 2. According to the screwing length of the bolt 3, the length of the frustum 5 exposed between the cross bar 1 and the vertical bar 2 is adjustable. A gasket 8 with a selectable thickness and quantity is sleeved on the frustum 5. After selecting a suitable gasket, the bolt 3 is locked and fixed so that the wire mesh 4 can be tensioned to an appropriate degree.

[0024] The length of the frustum 5 is less than the length of the first section 71 of the through hole 7, so as to leave a cavity between the frustum 5 and the first section 71. A spring 9 is sleeved on the bolt 3, and the spring 9 is located in the cavity. The two ends of the spring 9 respectively abut against the end faces of the frustum 5 and the first section 71, which is convenient for stretching the wire mesh 4 when the bolt 3 is unscrewed, reducing the need for manpower and making the tensioning of the wire mesh 4 more convenient.

[0025] Notches 21 are processed at both inner ends of the vertical rod 2. An insertion piece 11 that fits with the notch 21 is connected to the cross bar 1. When the bolt 3 is unscrewed to tension the wire mesh 4, a certain gap will be generated between the cross bar 1 and the vertical rod 2. The existence of the insertion piece 11 can prevent ink from entering the gap during printing and avoid liquid leakage. A plurality of guide grooves 211 are processed along the length direction of the bottom surface of the notch 21. A rib 111 corresponding to the guide groove 211 is formed on the inner side of the insertion piece 11. When the bolt 3 is loosened and the cross bar 1 is moved, the rib 111 of the insertion piece 11 slides along the guide groove 211, making the movement of the cross bar 1 more stable, avoiding deformation of the square frame caused by uneven force during adjustment, and further preventing ink from entering along the gap between the insertion piece 11 and the notch 21.

[0026] A boss 10 is provided on the side of the cross bar 1 away from the vertical rod 2. An installation hole 101 coaxial with the through hole 7 is processed on the boss 10. The diameter of the installation hole 101 is smaller than the diameter of the through hole 7. The bolt 3 sequentially passes through the installation hole 101 and the through hole 7 and is screwed into the threaded hole 6. In this embodiment, the gasket 8 is U-shaped, which is convenient for sleeving on the frustum 5. In other embodiments, the gasket 8 can also be of other suitable shapes.

[0027] When the wire mesh 4 is slack and cannot maintain the printing quality, only need to loosen the bolt 3 and pull it outwards. When the wire mesh 4 is tensioned to an appropriate tension, place a gasket 8 with an appropriate thickness on the exposed frustum 5, and then tighten the bolt 3 to complete the tension adjustment of the screen plate. The screen plate tension adjustment structure of the present utility model has a simple structure and convenient operation, can quickly and immediately adjust the tension of the wire mesh 4 of the screen plate, keep the quality of the printed matter stable, the screen plate can be used for a long time, and the cost is saved.

[0028] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present utility model.

Claims

1. A screen tension adjustment structure, characterized in that: It includes a cross bar, a vertical bar and a bolt, two of the vertical bars are arranged opposite to each other, and the two cross bars are arranged at both ends of the vertical bar, the cross bar and the vertical bar enclose a square frame, and a wire mesh is arranged on one side of the square frame; both ends of the vertical bar are provided with a frustum extending outward along the length direction, the center of the frustum is provided with a threaded hole, and the part of the cross bar near the end of the vertical bar is provided with a through hole, the through hole includes a first section with a diameter corresponding to the frustum and a second section with a diameter smaller than the frustum, the frustum is inserted into the first section and is slidably connected to the cross bar, the bolt passes through the through hole and is screwed into the threaded hole to connect the cross bar and the vertical bar, the length of the frustum exposed between the cross bar and the vertical bar is adjustable according to the screwing length of the bolt, and the frustum is sleeved with a gasket with optional thickness and quantity.

2. The screen tension adjustment structure according to claim 1, characterized in that: The length of the truncated cone is smaller than the length of the first section of the through hole. A spring is sleeved on the bolt, and two ends of the spring respectively abut against the end surface of the truncated cone and the first section.

3. The screen tension adjustment structure according to claim 1, characterized in that: Notches are arranged at both ends of the inner side of the vertical rod, and guide grooves are arranged on the bottom surface of the notch along the length direction. Inserts fitting the notches are arranged on the cross bar, and convex strips corresponding to the guide grooves are arranged on the inner side of the inserts.

4. The screen tension adjustment structure according to claim 1, characterized in that: The wire mesh is respectively bonded and connected to the horizontal rod and the vertical rod.

5. The screen tension adjustment structure according to claim 1, characterized in that: A boss is arranged on one side of the cross bar away from the vertical bar, and a mounting hole coaxial with the through hole is arranged on the boss. The diameter of the mounting hole is smaller than the diameter of the through hole, and the bolt passes through the mounting hole and the through hole in sequence and is screwed together with the threaded hole.

6. The screen tension adjustment structure according to claim 1, characterized in that: The gasket is U-shaped.

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