A plate adjustment mechanism for a sheet-fed offset printing press

Abstract

This utility model discloses a plate adjustment mechanism for a sheet-fed offset printing press, relating to the field of offset printing plate technology. It includes a plate roller with sliders at both ends. A drive motor is controlled to rotate a driving gear above a support plate, causing the driving gear to rotate a driven gear. This, in turn, causes the driven gear to drive a lead screw to rotate on the inner wall of the support plate, thereby driving the sliders to slide up and down on the inner wall of the support, adjusting the distance between the plate roller and the transfer roller. This ensures better printing on single sheets of paper by the offset printing press. A protective post is fixed to the top of the support plate, and a connecting plate slides on top of the protective post. A limiting post, fixed at the bottom of a fixing plate, is fitted onto the inner wall of a horizontal plate, allowing the bottom of the limiting post to engage with the inner wall of the support plate. This provides protection for the outer walls of the driving and driven gears mounted above the support plate, ensuring stable up-and-down adjustment of the plate roller on the outer wall of the support.

Description

Technical Field

[0001] This utility model relates to the field of printing plate technology for offset printing presses, specifically a printing plate adjustment mechanism for a sheet-fed offset printing press. Background Technology

[0002] The plate adjustment mechanism of a sheet-fed offset printing press is a device used to adjust the printing plate in a sheet-fed offset printing press.

[0003] Based on the above, the inventors have discovered that while there are many sheet-fed offset printing presses on the market, the fixed spacing between the printing plate roller and the transfer roller in general sheet-fed offset printing presses easily leads to poor printing quality and blurry printing when printing on paper of varying thicknesses. This severely increases the wear and tear on the sheet-fed offset printing press and reduces its practicality. Therefore, in view of this, the inventors have researched and improved the existing structure to provide a printing plate adjustment mechanism for a sheet-fed offset printing press, aiming to achieve a more practical purpose. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a printing plate adjustment mechanism for a sheet-fed offset printing machine, including a printing plate roller. Both ends of the printing plate roller are provided with sliders, and the outer walls of the two sliders are slidably supported. The top of the support is provided with an installation mechanism, and the outer wall of the installation mechanism is provided with a protective mechanism.

[0006] The installation mechanism includes:

[0007] A support plate is provided, with its bottom end fixed to the top end of the printing plate roller. A drive motor is fixed to the top end of the support plate, and a drive gear is coaxially connected to the output end of the drive motor. A driven gear is driven by the outer wall of the drive gear, and a lead screw is fixed to the bottom end of the driven gear. The outer wall of the lead screw is sleeved with the inner wall of the support plate, and the outer wall of the lead screw is driven by the inner wall of the slider.

[0008] As a preferred embodiment of this utility model, extension plates are fixed on both sides of the two sliders, and four sliding holes are provided on the inner wall of the bracket, with the inner walls of the four sliding holes sliding against the outer wall of the extension plates.

[0009] As a preferred embodiment of this utility model, the protective mechanism includes:

[0010] The protective column is fixed at its bottom end to the top end of the support plate, and is located on the outside of the drive motor and the drive gear.

[0011] As a preferred embodiment of this utility model, a concave plate is fixed to the top of the protective column, and a connecting plate is provided on the inner wall of the concave plate. The outer wall of the connecting plate slides against the top of the protective column.

[0012] As a preferred embodiment of this utility model, the inner wall of the connecting plate is fitted with two horizontal plates, and one side of each of the two horizontal plates is fixed to one side of the protective column.

[0013] As a preferred embodiment of this utility model, the inner walls of the two horizontal plates are fitted with limiting posts, the bottom ends of the two limiting posts are matched with the inner walls of the support plate, and the top ends of the two limiting posts are fixed with fixing plates, which are disposed at the top ends of the horizontal plates.

[0014] As a preferred embodiment of this utility model, each of the four sliding holes has an upright rod fixed to its inner wall, and the outer walls of the four upright rods slide against the inner wall of the extension plate.

[0015] The beneficial effects of this utility model are:

[0016] 1. In this solution, the drive motor is controlled to rotate the active gear above the support plate, which in turn drives the driven gear to rotate. This causes the driven gear to drive the lead screw to rotate on the inner wall of the support plate, thereby driving the slider to slide up and down on the inner wall of the bracket. At the same time, the extension plates fixed on both sides of the slider slide on the inner wall of the sliding hole, so that the operator can adjust the distance between the printing plate roller and the transfer roller according to the thickness of the paper, thus ensuring that the offset printing press can better print on single sheets of paper.

[0017] 2. In this solution, the protective column is fixed to the top of the support plate, and the connecting plate slides on the top of the protective column until the outer wall of the connecting plate engages with the inner wall of the concave plate, and the inner wall of the connecting plate matches the outer wall of the horizontal plate. The outer wall of the limiting column fixed at the bottom of the fixing plate is fitted with the inner wall of the horizontal plate, so that the bottom end of the limiting column engages with the inner wall of the support plate. This facilitates the protection of the outer walls of the driving gear and driven gear installed above the support plate, preventing external debris from falling between them and avoiding interference with their normal rotation. This ensures that the printing plate roller can be stably adjusted up and down on the outer wall of the support. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the printing plate adjustment mechanism of a sheet-fed offset printing press according to the present invention;

[0020] Figure 2This is a schematic diagram of the separation structure of the support and the upright of the printing plate adjustment mechanism of a sheet-fed offset printing machine according to this utility model;

[0021] Figure 3 This is an exploded view of the installation mechanism of the printing plate adjustment mechanism of a single-sheet offset printing press according to the present invention.

[0022] Figure 4 This is a schematic diagram of the protective mechanism structure of the printing plate adjustment mechanism of a sheet-fed offset printing press according to the present invention;

[0023] Figure 5 This is a schematic diagram of the separation structure of the protective column and connecting plate of the printing plate adjustment mechanism of a single-sheet offset printing machine according to the present invention.

[0024] In the diagram: 1. Printing roller; 2. Slider; 3. Bracket; 4. Mounting mechanism; 41. Support plate; 42. Drive motor; 43. Drive gear; 44. Driven gear; 45. Lead screw; 5. Protective mechanism; 51. Protective post; 52. Concave plate; 53. Connecting plate; 54. Horizontal plate; 55. Limiting post; 56. Fixing plate; 6. Extension plate; 7. Sliding hole; 8. Vertical pole. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] Example: Figures 1-5 As shown, the present invention provides a plate adjustment mechanism for a sheet-fed offset printing machine, including a plate roller 1, with sliders 2 at both ends of the plate roller 1, supports 3 sliding on the outer walls of the two sliders 2, a mounting mechanism 4 at the top of the supports 3, and a protective mechanism 5 on the outer wall of the mounting mechanism 4.

[0027] Installation mechanism 4 includes:

[0028] The support plate 41 is fixed at its bottom end to the top end of the printing plate roller 1. A drive motor 42 is fixed at the top end of the support plate 41. A drive gear 43 is coaxially connected to the output end of the drive motor 42. A driven gear 44 is driven by the outer wall of the drive gear 43. A lead screw 45 is fixed at the bottom end of the driven gear 44. The outer wall of the lead screw 45 is sleeved with the inner wall of the support plate 41. The outer wall of the lead screw 45 is driven by the inner wall of the slider 2.

[0029] As attached Figure 1 and Figure 2As shown, extension plates 6 are fixed on both sides of the two sliders 2. Four sliding holes 7 are provided on the inner wall of the bracket 3. The inner walls of the four sliding holes 7 slide against the outer walls of the extension plates 6. Upright rods 8 are fixed on the inner walls of the four sliding holes 7. The outer walls of the four upright rods 8 slide against the inner walls of the extension plates 6. This facilitates the stable sliding of the sliders 2 on the inner wall of the bracket 3 and is conducive to the normal use of the device.

[0030] As attached Figure 1 , Figure 4 and Figure 5 As shown, the protective mechanism 5 includes:

[0031] A protective column 51 is fixed at its bottom end to the top end of the support plate 41. The protective column 51 is located outside the drive motor 42 and the drive gear 43. A concave plate 52 is fixed at the top end of the protective column 51. A connecting plate 53 is provided on the inner wall of the concave plate 52. The outer wall of the connecting plate 53 slides against the top end of the protective column 51. Two horizontal plates 54 are sleeved on the inner wall of the connecting plate 53. One side of each horizontal plate 54 is fixed to one side of the protective column 51. A limiting post 55 is sleeved on the inner wall of each horizontal plate 54. The bottom end of each limiting post 55 matches the inner wall of the support plate 41. A fixing plate 56 is fixed at the top end of each limiting post 55. The fixing plate 56 is located at the top end of the horizontal plate 54 to protect the outer walls of the drive gear 43 and driven gear 44 installed above the support plate 41, so as to prevent external debris from falling between them and to avoid interfering with their normal rotation, thereby ensuring that the printing plate roller 1 can be stably adjusted up and down on the outer wall of the support 3.

[0032] Working principle: In use, the protective post 51 is fixed to the top of the support plate 41. The connecting plate 53 slides on the top of the protective post 51 until the outer wall of the connecting plate 53 engages with the inner wall of the concave plate 52, and the inner wall of the connecting plate 53 matches the outer wall of the horizontal plate 54. The outer wall of the limiting post 55, fixed at the bottom of the fixing plate 56, is fitted onto the inner wall of the horizontal plate 54, so that the bottom end of the limiting post 55 engages with the inner wall of the support plate 41. This facilitates the protection of the outer walls of the driving gear 43 and driven gear 44 installed above the support plate 41, preventing external debris from falling between them and avoiding interference between them. The normal rotation of the printing plate roller 1 ensures stable up-and-down adjustment on the outer wall of the support 3. The drive motor 42 drives the drive gear 43 to rotate above the support plate 41, which in turn drives the driven gear 44 to rotate. This causes the driven gear 44 to drive the lead screw 45 to rotate on the inner wall of the support plate 41, thereby driving the slider 2 to slide up and down on the inner wall of the support 3. At the same time, the extension plates 6 fixed on both sides of the slider 2 slide on the inner wall of the sliding hole 7, so that the operator can adjust the distance between the printing plate roller 1 and the transfer roller according to the thickness of the paper, thereby ensuring that the offset printing press can better print on single sheets of paper.

[0033] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plate adjusting mechanism for a sheet-fed offset printing press, comprising a plate roller (1), wherein both ends of the plate roller (1) are provided with sliders (2), and the outer walls of the two sliders (2) are slidably supported by brackets (3), characterized in that, The top of the bracket (3) is provided with an installation mechanism (4), and the outer wall of the installation mechanism (4) is provided with a protective mechanism (5). The installation mechanism (4) includes: The support plate (41) is fixed at the bottom end to the top end of the printing plate roller (1). A drive motor (42) is fixed at the top end of the support plate (41). A drive gear (43) is coaxially connected to the output end of the drive motor (42). A driven gear (44) is driven on the outer wall of the drive gear (43). A lead screw (45) is fixed at the bottom end of the driven gear (44). The outer wall of the lead screw (45) is sleeved with the inner wall of the support plate (41). The outer wall of the lead screw (45) is driven by the inner wall of the slider (2).

2. The plate adjusting mechanism for a sheet-fed offset printing press according to claim 1, characterized in that, Both sides of the two sliders (2) are fixed with extension plates (6), and the inner wall of the bracket (3) is provided with four sliding holes (7), and the inner walls of the four sliding holes (7) slide against the outer wall of the extension plate (6).

3. The plate adjusting mechanism for a sheet-fed offset printing press according to claim 1, characterized in that, The protective mechanism (5) includes: The bottom end of the protective column (51) is fixed to the top end of the support plate (41), and the protective column (51) is located on the outside of the drive motor (42) and the drive gear (43).

4. The plate adjusting mechanism for a sheet-fed offset printing press according to claim 3, characterized in that, The top of the protective column (51) is fixed with a concave plate (52), and the inner wall of the concave plate (52) is provided with a connecting plate (53). The outer wall of the connecting plate (53) slides against the top of the protective column (51).

5. The plate adjusting mechanism for a sheet-fed offset printing press according to claim 4, characterized in that, The inner wall of the connecting plate (53) is fitted with two horizontal plates (54), and one side of each of the two horizontal plates (54) is fixed to one side of the protective column (51).

6. The plate adjusting mechanism for a sheet-fed offset printing press according to claim 5, characterized in that, The inner walls of the two horizontal plates (54) are fitted with limiting posts (55), the bottom ends of the two limiting posts (55) are matched with the inner walls of the support plate (41), and the top ends of the two limiting posts (55) are fixed with fixing plates (56), which are located at the top ends of the horizontal plates (54).

7. The plate adjusting mechanism for a sheet-fed offset printing press according to claim 2, characterized in that, The inner walls of the four sliding holes (7) are all fixed with uprights (8), and the outer walls of the four uprights (8) slide against the inner wall of the extension plate (6).

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