Positioning jig for screen printing plate checking machine

Abstract

The utility model relates to the technical field of screen printing plates, and discloses a positioning jig for a screen printing plate checking machine, the positioning jig comprises a workbench, a first lead screw is rotatably inserted into the workbench, the outer circumferential surface of the first lead screw is in threaded connection with a first threaded pipe, and the outer circumferential surface of the first threaded pipe is fixedly connected with a first connecting plate; and the upper surface of the first connecting plate is fixedly connected with a first positioning plate. According to the positioning jig for the screen printing plate checking machine, when a first lead screw rotates, a first threaded pipe is driven to move, a first connecting plate is promoted to drive a first positioning plate to move, when a second lead screw rotates, a second threaded pipe is driven to move in the opposite direction, and a second connecting plate is promoted to drive a second positioning plate to be opened and closed; and the effects of conveniently positioning the screens of different models and improving the flexibility and practicability of the screen inspection machine are achieved, and the problems that an existing screen inspection device is relatively simple in limiting structure and cannot perform positioning inspection on the screens of the same model are solved.

Description

Technical Field

[0001] The present application relates to the technical field of screen plates, and specifically relates to a positioning fixture for a screen plate inspection machine. Background Technique

[0002] ‌A screen plate, also known as a screen, halftone screen or wire mesh plate, is an optical tool used for photoengraving. It is mainly used in the printing industry, especially in screen printing.

[0003] A prior patent (publication number: CN 219737324 U) discloses a screen plate alignment and inspection device, belonging to the technical field of solar screen plates. It includes a workbench, an alignment mechanism and an inspection mechanism. A groove for limiting the position of the screen plate is provided on the workbench. The alignment mechanism and the inspection mechanism are both installed on the workbench. The alignment mechanism includes a first guide rail and a second guide rail. The first guide rail is fixedly arranged on the workbench, and the second guide rail is slidably connected to the first guide rail. The inspection mechanism includes a support rod, a focusing component and an industrial camera. The support rod is slidably connected to the second guide rail, the focusing component is slidably connected to the support rod, and the industrial camera is connected to the focusing component. The industrial camera is used to inspect and identify defects on the screen plate. The present application has the effects of improving the efficiency of alignment and inspection and reducing the defective rate of the screen plate.

[0004] The above inspection device only limits the screen plate through the groove. However, there are many types of screen plates, and using the groove to limit the screen plate cannot meet the limiting requirements of different types of screen plates, reducing the flexibility and practicality of the inspection device. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the present application provides a positioning fixture for a screen plate inspection machine, which has the advantages of being able to position different types of screen plates, improving the flexibility and practicality of the inspection machine, etc., and solves the problem that the existing inspection device only limits the screen plate through the groove. However, there are many types of screen plates, and using the groove to limit the screen plate cannot meet the limiting requirements of different types of screen plates, reducing the flexibility and practicality of the inspection device.

[0006] To achieve the above object, the present application provides the following technical solution: A positioning fixture for a screen plate inspection machine, including a workbench. A first lead screw is rotatably inserted into the interior of the workbench. A first threaded tube is threadedly connected to the outer circumferential surface of the first lead screw. A first connecting plate is fixedly connected to the outer circumferential surface of the first threaded tube. A first positioning plate is fixedly connected to the upper surface of the first connecting plate. A second lead screw is rotatably inserted into the interior of the first positioning plate. Two second threaded tubes are threadedly connected to the outer circumferential surface of the second lead screw. A second connecting plate is fixedly connected to the outer circumferential surface of each second threaded tube. A second positioning plate is fixedly connected to the back surface of the second connecting plate. A third positioning plate is fixedly connected to the upper surface of the workbench.

[0007] Through the above solution, since the existing inspection device only limits the screen plate through the groove, but there are many types of screen plates, using the groove to limit the screen plate cannot meet the limiting requirements of different types of screen plates, reducing the flexibility and practicality of the inspection device. When the first lead screw rotates, it drives the first threaded tube to move, prompting the first connecting plate to drive the first positioning plate to move, thereby positioning the front surface of the screen plate. When the second lead screw rotates, it drives the second threaded tubes to move in opposite directions, prompting the second connecting plates to drive the second positioning plates to open and close, thereby positioning the two sides of the screen plate and completing the positioning operation of different types of screen plates.

[0008] Further, a first limiting ring is fixedly sleeved on the outer circumferential surface of the first lead screw, and the outer circumferential surface of the first limiting ring is rotatably connected to the interior of the workbench.

[0009] Through the above solution, the first lead screw is restricted to prevent the first lead screw from sliding and shifting, increasing the stability of the movement of the first lead screw.

[0010] Further, a first limiting groove is formed in the interior of the workbench, and the outer surface of the first connecting plate is slidably connected to the workbench through the first limiting groove.

[0011] Through the above solution, the first threaded tube is restricted to prevent the first threaded tube from rotating with the first lead screw, prompting the first threaded tube to always move horizontally.

[0012] Further, two threaded structures are provided on the outer circumferential surface of the second lead screw, and the thread track directions of the two threaded structures on the outer circumferential surface of the second lead screw are opposite.

[0013] Through the above solution, the second threaded tubes are prompted to move in opposite directions, and then the second positioning plates are prompted to move in opposite directions to position the two sides of the screen plate.

[0014] Furthermore, two second limiting rings are fixedly sleeved on the outer circumferential surface of the second lead screw, and the outer circumferential surface of each second limiting ring is rotatably connected to the inside of the first positioning plate.

[0015] Through the above solution, the second lead screw is restricted to prevent it from sliding and shifting, thereby increasing the stability of the movement of the second lead screw.

[0016] Furthermore, a second limiting groove is formed inside the first positioning plate, and the outer surface of the second connecting plate is slidably connected to the first positioning plate through the second limiting groove.

[0017] Through the above solution, the second threaded pipe is restricted to prevent it from rotating with the second lead screw, so that the second threaded pipe always moves horizontally.

[0018] Furthermore, two first guide rails are fixedly connected to the upper surface of the workbench. The outer surface of each first guide rail is slidably connected with a first slider. The upper surfaces of the two first sliders are fixedly connected with a second guide rail. The outer surface of the second guide rail is slidably connected with a second slider. The upper surface of the second slider is fixedly connected with a support rod. A focusing seat is slidably sleeved on the outer circumferential surface of the support rod. A variable magnification lens is slidably connected to the inside of the focusing seat. An industrial camera is provided at the top of the variable magnification lens.

[0019] Through the above solution, the positions of the industrial camera and the variable magnification lens can be adjusted through the first guide rail, the first slider, the second guide rail and the second slider, and the heights of the industrial camera and the variable magnification lens can be adjusted through the focusing seat.

[0020] Furthermore, a wireless transmitter is provided at the top of the industrial camera. A display screen is fixedly connected to the back of the workbench. A third limiting ring is slidably sleeved on the outer circumferential surface of the support rod. Scale marks are provided on the upper surface of each first guide rail, and scale marks are provided on the upper surface of the second guide rail.

[0021] Through the above solution, the wireless transmitter can transmit the shooting information of the industrial camera to the display screen, which is convenient for inspecting the screen. The third limiting ring can limit the adjustable distance of the focusing seat, and the scale marks are convenient for the inspectors to record the positions of the defects on the screen.

[0022] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0023] The positioning fixture for the screen plate inspection machine drives the first threaded pipe to move when the first lead screw rotates, prompting the first connecting plate to drive the first positioning plate to move. When the second lead screw rotates, it drives the second threaded pipe to move in the opposite direction, prompting the second connecting plate to drive the second positioning plate to open and close. This achieves the effect of facilitating the positioning of screen plates of different models and improving the flexibility and practicality of the inspection machine, and solves the problem that the limit structure of the existing screen plate inspection device is relatively simple and cannot position and inspect screen plates of the same model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall three-dimensional structure diagram of the present application;

[0025] Figure 2 is the overall side view structure diagram of the present application;

[0026] Figure 3 is the structure diagram of the first lead screw of the present application;

[0027] Figure 4 is the structure diagram of the second lead screw of the present application.

[0028] In the figure:

[0029] 1, workbench; 2, first lead screw; 3, first threaded pipe; 4, first connecting plate; 5, first positioning plate; 6, second lead screw; 7, second threaded pipe; 8, second connecting plate; 9, second positioning plate; 10, first limit ring; 11, first limit groove; 12, second limit ring; 13, second limit groove; 14, third positioning plate; 15, first guide rail; 16, first slider; 17, second guide rail; 18, second slider; 19, support rod; 20, focusing base; 21, zoom lens; 22, industrial camera; 23, wireless transmitter; 24, display screen; 25, third limit ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] Please refer to Figure 1 , Figure 3 and Figure 4, A positioning fixture for a screen plate inspection machine in this embodiment includes a workbench 1. A first lead screw 2 is rotatably inserted into the interior of the workbench 1. A first threaded tube 3 is threadedly connected to the outer circumferential surface of the first lead screw 2. A first connecting plate 4 is fixedly connected to the outer circumferential surface of the first threaded tube 3. A first positioning plate 5 is fixedly connected to the upper surface of the first connecting plate 4. A second lead screw 6 is rotatably inserted into the interior of the first positioning plate 5. Two second threaded tubes 7 are threadedly connected to the outer circumferential surface of the second lead screw 6. A second connecting plate 8 is fixedly connected to the outer circumferential surface of each second threaded tube 7. A second positioning plate 9 is fixedly connected to the back surface of the second connecting plate 8. A third positioning plate 14 is fixedly connected to the upper surface of the workbench 1.

[0032] Please refer to Figure 3 , A first limit ring 10 is fixedly sleeved on the outer circumferential surface of the first lead screw 2. The outer circumferential surface of the first limit ring 10 is rotatably connected to the interior of the workbench 1 to limit the first lead screw 2 and prevent the first lead screw 2 from sliding and shifting, increasing the stability of the movement of the first lead screw 2.

[0033] Please refer to Figure 1 and Figure 3 , A first limit groove 11 is formed in the interior of the workbench 1. The outer surface of the first connecting plate 4 is slidably connected to the workbench 1 through the first limit groove 11 to limit the first threaded tube 3 and prevent the first threaded tube 3 from rotating with the first lead screw 2, causing the first threaded tube 3 to always move horizontally.

[0034] Please refer to Figure 4 , The outer circumferential surface of the second lead screw 6 is provided with two threaded structures. The thread track directions of the two threaded structures on the outer circumferential surface of the second lead screw 6 are opposite, causing the second threaded tubes 7 to move in opposite directions, and further causing the second positioning plates 9 to move in opposite directions to position both sides of the screen plate.

[0035] Please refer to Figure 4 , Two second limit rings 12 are fixedly sleeved on the outer circumferential surface of the second lead screw 6. The outer circumferential surface of each second limit ring 12 is rotatably connected to the interior of the first positioning plate 5 to limit the second lead screw 6 and prevent the second lead screw 6 from sliding and shifting, increasing the stability of the movement of the second lead screw 6.

[0036] Please refer to Figure 3 and Figure 4 , A second limit groove 13 is formed in the interior of the first positioning plate 5. The outer surface of the second connecting plate 8 is slidably connected to the first positioning plate 5 through the second limit groove 13 to limit the second threaded tube 7 and prevent the second threaded tube 7 from rotating with the second lead screw 6, causing the second threaded tube 7 to always move horizontally.

[0037] Please refer to Figure 1 and Figure 2, two first guide rails 15 are fixedly connected to the upper surface of the workbench 1. The outer surface of each first guide rail 15 is slidably connected with a first slider 16. A second guide rail 17 is fixedly connected to the upper surfaces of the two first sliders 16. The outer surface of the second guide rail 17 is slidably connected with a second slider 18. A support rod 19 is fixedly connected to the upper surface of the second slider 18. A focusing base 20 is slidably sleeved on the outer circumferential surface of the support rod 19. A zoom lens 21 is slidably connected inside the focusing base 20. An industrial camera 22 is provided at the top of the zoom lens 21. The positions of the industrial camera 22 and the zoom lens 21 can be adjusted through the first guide rail 15, the first slider 16, the second guide rail 17 and the second slider 18, and the heights of the industrial camera 22 and the zoom lens 21 can be adjusted through the focusing base 20.

[0038] Please refer to Figure 1 and Figure 2 , a wireless transmitter 23 is provided at the top of the industrial camera 22. A display screen 24 is fixedly connected to the back of the workbench 1. A third limiting ring 25 is slidably sleeved on the outer circumferential surface of the support rod 19. Scale marks are provided on the upper surfaces of each first guide rail 15 and the upper surface of the second guide rail 17. The wireless transmitter 23 can transmit the shooting information of the industrial camera 22 to the display screen 24, thereby facilitating the inspection of the screen printing stencil. The third limiting ring 25 can limit the adjustable distance of the focusing base 20, and the scale marks are convenient for the inspectors to record the positions of the defects on the screen printing stencil.

[0039] A positioning jig for a screen printing stencil inspection machine in this embodiment drives the first threaded tube 3 to move when the first lead screw 2 rotates, prompting the first connecting plate 4 to drive the first positioning plate 5 to move. When the second lead screw 6 rotates, it drives the second threaded tube 7 to move in the opposite direction, prompting the second connecting plate 8 to drive the second positioning plate 9 to open and close, achieving the effect of facilitating the positioning of screen printing stencils of different models and improving the flexibility and practicality of the inspection machine, and solving the problem that the limiting structure of the existing screen printing stencil inspection device is relatively simple and cannot perform positioning inspection on screen printing stencils of the same model.

[0040] It should be noted that locking bolts are threadedly connected inside the first slider 16, the second slider 18, the focusing base 20 and the third limiting ring 25, which is convenient for positioning the first slider 16, the second slider 18, the focusing base 20 and the third limiting ring 25.

[0041] The working principle of the above embodiment is:

[0042] When it is necessary to inspect the screen printing stencil, place the stencil on the workbench 1 and press it tightly against the third positioning plate 14. Then rotate the first lead screw 2 to drive the first threaded tube 3 to move. The first threaded tube 3 drives the first positioning plate 5 to move through the first connecting plate 4, so that the first positioning plate 5 presses the stencil against the third positioning plate 14. After that, rotate the second lead screw 6 to drive the second threaded tube 7 to move inward. The second threaded tube 7 drives the second positioning plate 9 to move inward through the second connecting plate 8, so that the second positioning plate 9 clamps both sides of the stencil. Immediately, the positioning operation of the stencil is completed. The positions of the industrial camera 22 and the zoom lens 21 can be adjusted through the first guide rail 15, the first slider 16, the second guide rail 17 and the second slider 18. The height of the industrial camera 22 and the zoom lens 21 can be adjusted through the focusing base 20, and then the inspection operation of the stencil can be carried out. During the inspection process, the wireless transmitter 23 can transmit the shooting information of the industrial camera 22 to the display screen 24 for intuitive display through the display screen 24.

[0043] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0044] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for a screen inspection machine, comprising a workbench (1), characterized in that: A first screw rod (2) is rotatably inserted inside the workbench (1), a first threaded tube (3) is threadedly connected to the outer circumferential surface of the first screw rod (2), a first connecting plate (4) is fixedly connected to the outer circumferential surface of the first threaded tube (3), a first positioning plate (5) is fixedly connected to the upper surface of the first connecting plate (4), a second screw rod (6) is rotatably inserted inside the first positioning plate (5), two second threaded tubes (7) are threadedly connected to the outer circumferential surface of the second screw rod (6), a second connecting plate (8) is fixedly connected to the outer circumferential surface of each second threaded tube (7), a second connecting plate (8) is fixedly connected to the back surface of the second connecting plate (8), and a third positioning plate (14) is fixedly connected to the upper surface of the workbench (1).

2. The positioning fixture for a screen inspection machine according to claim 1, characterized in that: A first limiting ring (10) is fixedly sleeved on the outer circumferential surface of the first screw rod (2), and the outer circumferential surface of the first limiting ring (10) is rotatably connected to the inside of the workbench (1).

3. The positioning fixture for a screen inspection machine according to claim 1, characterized in that: A first limiting groove (11) is provided inside the workbench (1), and the outer surface of the first connecting plate (4) is slidably connected to the workbench (1) via the first limiting groove (11).

4. The positioning fixture for a screen inspection machine according to claim 1, characterized in that: The outer circumferential surface of the second screw rod (6) is provided with two sections of threaded structure, and the threaded tracks of the two sections of threaded structure on the outer circumferential surface of the second screw rod (6) are in opposite directions.

5. The positioning fixture for a screen inspection machine according to claim 1, characterized in that: Two second limiting rings (12) are fixedly sleeved on the outer circumferential surface of the second screw rod (6), and the outer circumferential surface of each second limiting ring (12) is rotatably connected to the inside of the first positioning plate (5).

6. The positioning fixture for a screen inspection machine according to claim 1, characterized in that: A second limiting groove (13) is provided inside the first positioning plate (5), and the outer surface of the second connecting plate (8) is slidably connected to the first positioning plate (5) via the second limiting groove (13).

7. The positioning fixture for a screen inspection machine according to claim 1, characterized in that: Two first guide rails (15) are fixedly connected to the upper surface of the workbench (1), the outer surface of each of the first guide rails (15) is slidably connected to a first slider (16), the upper surfaces of the two first sliders (16) are fixedly connected to a second guide rail (17), the outer surfaces of the second guide rails (17) are slidably connected to a second slider (18), the upper surface of the second slider (18) is fixedly connected to a support rod (19), the outer circumferential surface of the support rod (19) is slidably sleeved with a focus seat (20), the interior of the focus seat (20) is slidably connected to a zoom lens (21), and the top of the zoom lens (21) is provided with an industrial camera (22).

8. The positioning fixture for a screen inspection machine according to claim 7, characterized in that: A wireless transmitter (23) is provided at the top of the industrial camera (22), a display screen (24) is fixedly connected to the back of the workbench (1), a third limiting ring (25) is slidably sleeved on the outer circumferential surface of the support rod (19), a scale mark is provided on the upper surface of each of the first guide rails (15), and a scale mark is provided on the upper surface of the second guide rail (17).

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