Screen placing mechanism for printing-down machine

Abstract

The utility model relates to a screen placing mechanism for a printing-down machine. The screen placing mechanism comprises a support; the push block is used for placing the screen; the first driving mechanism is arranged on the bracket; the placing frame is connected with the bracket and is placed on the edge of the working surface of the printing-down machine; a movable support; a roller; supporting the screen printing plate in a rolling manner; the second driving mechanism is arranged on the placing frame; wherein the bracket forms an inclined structure from the printing-down machine to the ground; the first driving mechanism drives the push block to move along the inclined structure; the second driving mechanism drives the movable bracket to move along the working surface of the printing-down machine; and the rollers are rotationally arranged on the movable bracket and the placement frame respectively. The problem that in an existing scheme, two workers need to operate synchronously to stably carry the screen printing plate, and the screen printing plate placing process is slow is solved.

Description

Technical Field

[0001] The utility model relates to the field of screen placement mechanisms, in particular to a screen placement mechanism for a plate exposure machine. Background Art

[0002] The plate-making machine uses a photochemical reaction to press the original pattern onto the screen. Large screens require larger plate-making machines. To place the screen on the machine's work surface, stairs must be installed on both sides of the machine. The screen is manually lifted up on both sides and carried to the top of the machine's work surface via the stairs, where it can then be gently placed.

[0003] This requires two workers to operate simultaneously and ensure that their movements are synchronized in order to smoothly move the screen, making the screen placement process relatively slow.

[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 shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a screen placement mechanism for a platemaking machine to solve the problem in the prior art that two workers need to operate synchronously to smoothly transport the screen, making the screen placement process relatively slow.

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

[0007] A screen placement mechanism for a plate exposure machine;

[0008] It includes: a bracket; a push block for placing the screen; a first driving mechanism, which is arranged on the bracket; a placement frame, which is connected to the bracket and placed on the edge of the working surface of the plate exposure machine; a movable bracket; a roller; a rolling support for the screen; and a second driving mechanism, which is arranged on the placement frame.

[0009] Among them, the bracket forms an inclined structure from the platemaking machine to the ground; the first driving mechanism drives the push block to move along the inclined structure; the second driving mechanism drives the mobile bracket to move along the working surface of the platemaking machine; the rollers are rotatably arranged on the mobile bracket and the placement rack respectively.

[0010] A further technical solution is that the first driving mechanism includes a first driving wheel rotatably arranged on the bracket, a driving belt wrapped around the first driving wheel and a first power device arranged on the bracket; wherein, the push block is connected to the driving belt; and the first power device drives the first driving wheel to rotate.

[0011] A further technical solution is that the second driving mechanism includes a second power device arranged on the placement rack, a second driving wheel arranged at the driving end of the second power device and a driving bar slidingly arranged on the placement rack; wherein, the second driving wheel engages with the driving bar; and the driving bar is connected to the mobile bracket.

[0012] A further technical solution is that a moving wheel is rotatably provided on the moving bracket; and the moving wheel rolls along the working surface of the plate exposure machine.

[0013] A further technical solution is that a moving rod is movably provided on the moving bracket; the roller is rotatably provided on the moving rod; a first elastic device is sleeved on the moving rod; and the first elastic device elastically pushes the moving rod upward.

[0014] A further technical solution is that a moving block is movably provided on the placement rack; the roller is rotatably provided on the moving block; a second elastic device is provided on the placement rack; and the second elastic device elastically pushes the moving block.

[0015] A further technical solution is that a guide block is provided on the side of the moving block close to the screen; a curved surface is formed on the guide block; one end of the curved surface extends toward the working surface of the platemaking machine, and the other end of the curved surface extends toward the roller.

[0016] A further technical solution is that the curved surfaces are arranged side by side from top to bottom to form incisions.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) the first driving mechanism drives the push block to push the screen to swing from an inclined state to a horizontal state, and then the second driving mechanism drives the movable bracket to move, and the screen is placed horizontally at a certain height above the working surface of the platemaking machine; the loading and placement processes are completed automatically, thereby improving the placement efficiency of the screen; thereafter, the second driving mechanism drives the movable bracket to move and reset, and the left and right ends of the screen are placed separately to avoid scratching and colliding with the working surface of the platemaking machine.

[0018] (2) When the screen approaches the working surface of the platemaking machine, it swings from an inclined state to a horizontal state, and the roller on the movable bracket needs to be moved to a specific position on the working surface of the platemaking machine, and the roller on the movable bracket supports the left side of the screen; as the screen continues to move horizontally to the left and approaches the working surface of the platemaking machine, the movable bracket moves synchronously to the left, so that the roller on the movable bracket always supports the left side of the screen; to prevent the left side of the screen from contacting the working surface of the platemaking machine, causing scratches on the working surface of the platemaking machine during movement; when the screen is completely out of the inclined structure, the roller on the placement rack supports the right side of the screen to prevent the right side of the screen from falling and hitting the working surface of the platemaking machine.

[0019] (3) when the screen is swung from the inclined state to the horizontal state, the left end of the screen swings downward to contact the upper roller of the moving support, and the screen forms a downward stamping force on the upper roller of the moving support; the first elastic device is elastically pushed to form an elastic support on the upper roller of the moving support, so that the downward stamping force of the screen is avoided from impacting the working surface of the exposure machine through the moving support.

[0020] (4) when the roller no longer supports the screen, the screen falls to the working surface of the exposure machine, and the edge of the screen contacts the curved surface during the falling process, so that the screen slides along the curved surface to the working surface of the exposure machine, thereby avoiding the screen from directly falling to impact the working surface of the exposure machine. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure of the screen placing mechanism for the exposure machine is shown.

[0022] Figure 2 The structure of the screen placing mechanism for the exposure machine is shown. Figure 1 The enlarged structure diagram of A in the figure is shown.

[0023] Figure 3 The enlarged structure diagram of B in the figure is shown. Figure 1 The enlarged structure diagram of B in the figure is shown.

[0024] In the figure, 1 is a support, 11 is an inclined structure, 2 is a push block, 3 is a first driving mechanism, 31 is a first driving wheel, 32 is a driving belt, 33 is a first power device, 4 is a second driving mechanism, 41 is a second power device, 42 is a second driving wheel, 43 is a driving strip, 5 is a moving support, 51 is a moving wheel, 52 is a first elastic device, 53 is a moving rod, 6 is a roller, 7 is a placing rack, 71 is a moving block, 72 is a second elastic device, 73 is a guide block, 74 is a curved surface, and 75 is a cutout. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear, the device provided by the utility model is further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the utility model will be clearer according to the following description. It should be noted that the drawings are greatly simplified and all use non-precise proportions, and are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the drawings. It should be known that the structure, proportion, size, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the conditions of the implementation of the utility model, so they do not have the technical essence, any modification of the structure, change of the proportion relationship or adjustment of the size, as long as it does not affect the effect and purpose that can be achieved by the utility model, it should still fall within the scope of the technical content disclosed by the utility model.

[0026] Figure 1 The structure diagram of the screen placement mechanism for the plate exposure machine according to the embodiment of the present utility model is shown. Figure 2 Shown Figure 1 Enlarged structural diagram at point A in the middle. Figure 3 Shown Figure 1 The enlarged structure diagram of B in the middle. Figure 1-Figure 3 As shown, the utility model discloses a screen placing mechanism for a plate exposure machine.

[0027] The screen placement mechanism for the platemaking machine includes: a movable bracket 5, a placement rack 7, a bracket 1, a push block 2 for placing the screen, a first driving mechanism 3 arranged on the bracket 1, a roller 6 for rolling and supporting the screen, and a second driving mechanism 4 arranged on the placement rack 7.

[0028] The placement rack 7 connects to the left end of the bracket 1 and is positioned at the edge of the plate exposure machine's work surface. The right side of the bracket 1 forms an inclined structure 11 extending from the plate exposure machine toward the ground. The screen is placed at an angle on this inclined structure 11. The first drive mechanism 3 drives the push block 2 upward along the inclined structure 11, pushing the screen onto the plate exposure machine's work surface.

[0029] Rollers 6 are rotatably mounted on the mobile bracket 5 and the placement rack 7. The screen swings from an inclined position to a horizontal position. The second drive mechanism 4 drives the mobile bracket 5 to move leftward along the working surface of the plate exposure machine. Rollers 6 on the mobile bracket 5 roll and support the left end of the screen. The push block 2 continues to push the screen along the working surface of the plate exposure machine. Rollers 6 on the placement rack 7 roll and support the right end of the screen. At this time, the screen is horizontally positioned above the working surface of the plate exposure machine.

[0030] The second driving mechanism 4 drives the movable bracket 5 to move to the right along the working surface of the plate exposure machine, and the left end of the screen swings downward and is placed on the working surface of the plate exposure machine. The movable bracket 5 drives the roller 6 on the placement frame 7 to move to the right, and the right end of the screen swings downward and is placed on the working surface of the plate exposure machine, so that the screen is completely horizontally placed on the working surface of the plate exposure machine.

[0031] The first drive mechanism 3 drives the push block 2 to swing the screen from an inclined position to a horizontal position. The second drive mechanism 4 then drives the movable bracket 5 to move and position the screen horizontally at a predetermined height above the working surface of the plate exposure machine. This automated loading and placement process improves screen placement efficiency. The second drive mechanism 4 then drives the movable bracket 5 to reset, positioning the left and right ends of the screen separately to prevent scratches and collisions on the working surface of the plate exposure machine.

[0032] The first drive mechanism 3 includes a first drive wheel 31 rotatably mounted on the support 1, a drive belt 32 wound around the first drive wheel 31, and a first power unit 33 mounted on the support 1. The push blocks 2 are connected to the drive belt 32. Exemplarily, the push blocks 2 are provided in two groups. Exemplarily, the drive belt 32 is provided in two groups. Exemplarily, the first power unit 33 is a motor. The first drive wheels 31 are located at both ends of the tilting structure 11.

[0033] The screen is placed at an angle on the inclined structure 11, with the push block 2 supporting the lower end of the screen. The first power device 33 drives the first drive wheel 31 to rotate, which in turn drives the drive belt 32 and the push block 2 along the inclined structure 11, pushing the screen toward the working surface of the plate exposure machine.

[0034] The second driving mechanism 4 includes a second power device 41 provided on the placement frame 7, a second driving wheel 42 provided at the driving end of the second power device 41, and a driving bar 43 slidably provided on the placement frame 7. The second driving wheel 42 engages the driving bar 43. The driving bar 43 is connected to the mobile bracket 5.

[0035] Exemplarily, the second power device 41 is a motor. The second power device 41 drives the second driving wheel 42 to rotate, and the second driving wheel 42 drives the driving bar 43 and the movable bracket 5 to move.

[0036] As the screen approaches the plate exposure machine's work surface, it swings from an inclined position to a horizontal position. This requires the rollers 6 on the movable bracket 5 to move to a specific position on the plate exposure machine's work surface, supporting the left side of the screen. As the screen continues to move horizontally to the left, closer to the plate exposure machine's work surface, the movable bracket 5 moves synchronously to the left, ensuring that the rollers 6 on the movable bracket 5 always support the left side of the screen. This prevents the left side of the screen from contacting the plate exposure machine's work surface, which could be scratched during movement.

[0037] When the screen is completely separated from the tilting structure 11, the roller 6 on the placement frame 7 supports the right side of the screen to prevent the right side of the screen from falling and hitting the working surface of the plate exposure machine.

[0038] The lower end of the mobile bracket 5 is rotatably provided with moving wheels 51, which roll along the working surface of the plate exposure machine. For example, two sets of moving wheels 51 are provided. By rolling along the working surface of the plate exposure machine, the mobile bracket 5 can move smoothly along the working surface. Furthermore, the moving wheels 51 are in rolling contact with the working surface, preventing scratches on the working surface.

[0039] A movable rod 53 is movably mounted on the movable bracket 5. The movable rod 53 is vertically mounted and moves up and down along the movable bracket 5. A roller 6 is rotatably mounted on the upper end of the movable rod 53. A first elastic device 52 is sleeved on the movable rod 53. The first elastic device 52 is illustratively a spring. The upper end of the first elastic device 52 abuts against the upper end of the movable rod 53, while the lower end of the first elastic device 52 abuts against the movable bracket 5. The first elastic device 52 elastically pushes the movable rod 53 upward.

[0040] When the screen swings from an inclined position to a horizontal position, the left end of the screen swings downward and contacts the roller 6 on the movable bracket 5, exerting downward pressure on the roller 6. The first elastic device 52 elastically pushes the movable rod 53, providing elastic support for the roller 6 on the movable bracket 5, preventing the downward pressure of the screen from impacting the working surface of the plate exposure machine through the movable bracket 5.

[0041] A movable block 71 is movably mounted on the mounting frame 7, allowing it to move left and right along the mounting frame 7. A roller 6 is rotatably mounted on the upper end of the movable block 71. A second elastic device 72 is mounted on the mounting frame 7, oriented for left and right movement. Exemplarily, the second elastic device 72 is a spring. The left end of the second elastic device 72 elastically pushes the movable block 71, imparting a leftward thrust to the movable block 71.

[0042] When the screen needs to be completely placed on the working surface of the plate exposure machine, the movable bracket 5 moves to the right, first placing the left end of the screen on the working surface of the plate exposure machine. The movable bracket 5 continues to move to the right until it contacts the movable block 71, driving the movable block 71 and the roller 6 on the placement frame 7 to move to the right, and the second elastic device 72 is compressed. When the movable bracket 5 is released from the movable block 71, the second elastic device 72 extends, pushing the movable block 71 and the roller 6 on the placement frame 7 to move to the left and reset.

[0043] A guide block 73 is provided on the side of the movable block 71 near the screen, and is located on the left side of the movable block 71. A curved surface 74 is formed on the side of the guide block 73 near the screen. One end of the curved surface 74 extends toward the working surface of the plate exposure machine, and the other end of the curved surface 74 extends toward the roller 6.

[0044] When the roller 6 no longer supports the screen, the screen falls to the working surface of the plate exposure machine. During the falling process, the edge of the screen contacts the curved surface 74, and the screen slides along the curved surface 74 to the working surface of the plate exposure machine, preventing the screen from falling directly and hitting the working surface of the plate exposure machine.

[0045] The curved surfaces 74 are arranged side by side from top to bottom to form cutouts 75 .

[0046] The cutouts 75 divide the curved surface 74 into several sections. When the screen slides along the curved surface 74 , the cutouts 75 slow down the sliding speed of the screen, thereby preventing the screen from damaging the working surface of the plate exposure machine when it slides onto the working surface of the plate exposure machine.

[0047] 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.

[0048] 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 placement mechanism for a plate exposure machine, characterized in that: include: Bracket (1); Push block (2) to place the screen; A first driving mechanism (3) is arranged on the bracket (1); A placement rack (7) connected to the bracket (1) and placed on the edge of the working surface of the plate exposure machine; Mobile support (5); Roller (6); rolling support screen; A second driving mechanism (4) is arranged on the placement rack (7); The bracket (1) forms an inclined structure (11) from the plate-exposure machine to the ground; the first driving mechanism (3) drives the push block (2) to move along the inclined structure (11); the second driving mechanism (4) drives the movable bracket (5) to move along the working surface of the plate-exposure machine; and the rollers (6) are rotatably arranged on the movable bracket (5) and the placement rack (7), respectively.

2. The screen placement mechanism for a plate exposure machine according to claim 1, characterized in that: The first driving mechanism (3) comprises a first driving wheel (31) rotatably arranged on the bracket (1), a driving belt (32) wound around the first driving wheel (31), and a first power device (33) arranged on the bracket (1); wherein the push block (2) is connected to the driving belt (32); and the first power device (33) drives the first driving wheel (31) to rotate.

3. The screen placement mechanism for a plate exposure machine according to claim 1, wherein: The second driving mechanism (4) comprises a second power device (41) arranged on the placement rack (7), a second driving wheel (42) arranged at the driving end of the second power device (41), and a driving bar (43) slidably arranged on the placement rack (7); wherein the second driving wheel (42) engages with the driving bar (43); and the driving bar (43) is connected to the movable bracket (5).

4. The screen placement mechanism for a plate exposure machine according to claim 1, wherein: A moving wheel (51) is rotatably provided on the moving bracket (5); the moving wheel (51) rolls along the working surface of the plate exposure machine.

5. The screen placement mechanism for a plate exposure machine according to claim 4, characterized in that: A moving rod (53) is movably arranged on the moving bracket (5); the roller (6) is rotatably arranged on the moving rod (53); a first elastic device (52) is sleeved on the moving rod (53); the first elastic device (52) elastically pushes the moving rod (53) upward.

6. The screen placement mechanism for a plate exposure machine according to claim 1, wherein: A moving block (71) is movably arranged on the placement rack (7); the roller (6) is rotatably arranged on the moving block (71); a second elastic device (72) is arranged on the placement rack (7); and the second elastic device (72) elastically pushes the moving block (71).

7. The screen placement mechanism for a plate exposure machine according to claim 6, characterized in that: A guide block (73) is provided on one side of the movable block (71) close to the screen; a curved surface (74) is formed on the guide block (73); one end of the curved surface (74) extends toward the working surface of the plate exposure machine, and the other end of the curved surface (74) extends toward the roller (6).

8. The screen placement mechanism for a plate exposure machine according to claim 7, characterized in that: The curved surfaces (74) are arranged side by side from top to bottom to form cutouts (75).

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