Bookblock positioning mechanism for offset printing machine

Abstract

The bookblock positioning mechanism for the offset printing machine comprises a supporting plate, two first guide rails are arranged on the supporting plate, connecting shafts are connected into the two first guide rails in a sliding mode respectively, a cross rod is connected to the bottom end of the supporting plate in a sliding mode, a second guide rail is arranged on the cross rod, and the connecting shafts are connected with the second guide rail in a sliding mode. The second guide rail is matched with two connecting shafts, and one end of each connecting shaft is fixedly connected with a limiting block. According to the book block positioning mechanism, the clamping block, the movable rod and the pressing plate are matched, all-directional positioning of a book block is achieved, the positioning effect of the positioning mechanism is good, it is guaranteed that a printing material does not shake or shift in the printing process, the printing position is accurate, and therefore the quality and consistency of printed matter are improved, the book block positioning mechanism is an automatic book block positioning system, and the production efficiency is improved. Manual intervention is reduced, the production efficiency of the printing machine is improved, and the printing period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of printing presses, in particular to a book block positioning mechanism for an offset printing press. Background Art

[0002] Offset printing presses are a common printing equipment used to produce various types of printed materials. They use flexible plates to transfer images or texts to printed materials. This method can achieve high-speed and efficient printing and is suitable for large-scale production. The book core used by offset printing presses may refer to the book core paper used in the book printing process, that is, the printing paper used for the inner pages of the book. Book core paper is usually a kind of paper with good texture and high smoothness, which is suitable for printing text and pictures. In offset printing, book core paper is usually used for printing books, magazines, brochures, etc.

[0003] Existing book block positioning mechanisms for offset printing presses generally have poor positioning effects and cannot provide sufficient accuracy and stability, resulting in deviations or inaccuracies in printing positions, which may require additional adjustments and maintenance costs, which may increase the production costs of printing operations. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing book block positioning mechanism for offset printing press generally has poor positioning effect, resulting in deviation or inaccuracy of printing position.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: a book block positioning mechanism for an offset printing machine, including a support plate, two first guide rails are provided on the support plate, and connecting shafts are slidably connected in the two first guide rails respectively, and a cross bar is slidably connected to the bottom end of the support plate, and a second guide rail is provided on the cross bar, and the second guide rail cooperates with the two connecting shafts, and one end of the two connecting shafts is fixedly connected to a limiting block.

[0006] The utility model is further configured such that one end of the two connecting shafts away from the limit block is respectively fixedly connected with a clamping block, a groove is provided at the bottom end of the two clamping blocks, one end of the two clamping blocks is fixedly connected with a slider, a movable rod is provided on one side of the two clamping blocks, a sliding rail is provided on the movable rod, and the sliding rail is slidably connected to the two sliders.

[0007] Through the above technical solution, the two clamping blocks always move synchronously, so that the clamping blocks can clamp book blocks of different widths, which can reduce the need for equipment replacement or adjustment, thereby saving production costs and time. The two clamping blocks ensure that the book block is always located in the center, which can reduce printing errors caused by material deviation, thereby reducing the scrap rate and saving production costs. When the book block is located in the center, the pressure distribution of the printing press will be more uniform, which helps to improve printing quality and reduce printing defects caused by uneven pressure.

[0008] The utility model is further configured such that two mounting seats are fixedly connected to the bottom end of the support plate, one side of one of the mounting seats is fixedly connected to a motor, a threaded rod is fixedly connected to the output end of the motor, a bearing is provided at the end of the threaded rod away from the motor, the bearing is fixedly connected to the mounting seat, the threaded rod is threadedly connected to the cross bar, and a plurality of supporting feet are fixedly connected to the bottom end of the support plate.

[0009] Through the above technical solution, the bearing can reduce the friction resistance during rotation, make the rotation of the threaded rod more stable, reduce vibration and noise, improve the efficiency of the threaded rod rotation, thereby reducing energy consumption, and the bearing can provide a sliding surface to reduce the friction and wear between the threaded rod and the supporting structure, thereby extending the service life of the equipment.

[0010] The utility model is further configured as follows: a fixed cover is fixedly connected to the support plate, a first cylinder is fixedly connected to the top of the fixed cover, a movable plate is fixedly connected to the output end of the first cylinder, a second cylinder is fixedly connected to the bottom end of the movable plate, and a through hole is opened on the top of the fixed cover.

[0011] The utility model is further configured such that the output end of the second cylinder is fixedly connected to a mounting plate, a side of the mounting plate away from the second cylinder is fixedly connected to a printed board, a fixing block is provided on one side of the printed board, and the fixing block is fixedly connected to the mounting plate.

[0012] The utility model is further configured that one end of the fixed block away from the mounting plate is slidably connected to a clamping plate, two return springs are fixedly connected to the clamping plate, and the other end of the return spring is fixedly connected to the fixed block.

[0013] Through the above technical solution, the mounting plate drives the pressing plate and the printing plate to move downward together. The pressing plate contacts the book core first. When the mounting plate drives the printing plate to continue to move downward, the reset spring is compressed, and the printing plate contacts the surface of the book core for printing, ensuring that the pressing plate always presses one end of the book core during the printing process to position the book core and reduce the movement and deformation of the book core.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model clamps both sides of the book core by two clamping blocks moving toward the middle at the same time, ensuring that the book core is located at the center without deviation, and at the same time the movable rod moves with the clamping blocks so that the movable rod always presses against one end of the book core. During printing, the pressing plate always presses the other end of the book core, thereby achieving all-round positioning of the book core and having a good positioning effect, so that the printed material can remain stable during the printing process, reducing movement and deformation, and being conducive to avoiding printing position deviation or distortion, reducing adjustment time and scrap rate, and reducing manual intervention, thereby improving the production efficiency of the printing machine and shortening the printing cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 It is a three-dimensional cross-sectional view of the utility model;

[0018] Figure 3 It is a three-dimensional structural diagram of the first guide rail of the utility model;

[0019] Figure 4 It is a three-dimensional structural diagram of the reset spring of the utility model.

[0020] In the figure: 1. support plate; 2. first guide rail; 3. connecting shaft; 4. clamping block; 5. cross bar; 6. second guide rail; 7. limit block; 8. mounting seat; 9. motor; 10. threaded rod; 11. bearing; 12. movable rod; 13. slide rail; 14. slider; 15. fixed cover; 16. first cylinder; 17. movable plate; 18. through hole; 19. second cylinder; 20. mounting plate; 21. printing plate; 22. fixed block; 23. clamping plate; 24. reset spring; 25. support foot; 26. groove. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with 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 a clearer and more definite definition of the protection scope of the present invention.

[0022] See also Figure 1-Figure 4 A book block positioning mechanism for an offset printing machine includes a support plate 1, two first guide rails 2 are provided on the support plate 1, connecting shafts 3 are slidably connected in the two first guide rails 2, a cross bar 5 is slidably connected to the bottom end of the support plate 1, a second guide rail 6 is provided on the cross bar 5, the second guide rail 6 cooperates with the two connecting shafts 3, and one end of the two connecting shafts 3 is fixedly connected to a limiting block 7.

[0023] The two connecting shafts 3 are fixedly connected to the clamping blocks 4 at one end away from the limit block 7, and the bottom ends of the two clamping blocks 4 are provided with grooves 26. One end of the two clamping blocks 4 is fixedly connected to the slider 14, and a movable rod 12 is provided on one side of the two clamping blocks 4. The movable rod 12 is provided with a slide rail 13, and the slide rail 13 is slidably connected to the two sliders 14; the bottom end of the support plate 1 is fixedly connected to two mounting seats 8, one side of one mounting seat 8 is fixedly connected to a motor 9, and the output end of the motor 9 is fixedly connected to a threaded rod 10, and the end of the threaded rod 10 away from the motor 9 is provided with a bearing 11, the bearing 11 is fixedly connected to the mounting seat 8, and the threaded rod 10 is threadedly connected to the cross bar 5, and the bottom end of the support plate 1 is fixedly connected to a number of supporting feet 25.

[0024] A fixed cover 15 is fixedly connected to the support plate 1, a first cylinder 16 is fixedly connected to the top of the fixed cover 15, a movable plate 17 is fixedly connected to the output end of the first cylinder 16, a second cylinder 19 is fixedly connected to the bottom end of the movable plate 17, and a through hole 18 is provided at the top of the fixed cover 15; a mounting plate 20 is fixedly connected to the output end of the second cylinder 19, a printed board 21 is fixedly connected to the side of the mounting plate 20 away from the second cylinder 19, a fixed block 22 is provided on one side of the printed board 21, and the fixed block 22 is fixedly connected to the mounting plate 20; a clamping plate 23 is slidably connected to the end of the fixed block 22 away from the mounting plate 20, two return springs 24 are fixedly connected to the clamping plate 23, and the other end of the return spring 24 is fixedly connected to the fixed block 22.

[0025] When the utility model is in use, the book block is placed on the support plate 1, and the motor 9 is started. The motor 9 drives the threaded rod 10 to rotate. Since the threaded rod 10 is threadedly connected to the cross bar 5, the cross bar 5 moves. At this time, the cross bar 5 drives the connecting shaft 3 to move together. The connecting shaft 3 slides along the track of the first guide rail 2, so that the two clamping blocks 4 move closer to the middle together, and the position of the book block is adjusted and positioned. At the same time, when the clamping block 4 moves, it drives the slider 14 to move together. The slider 14 slides in the slide rail 13, and the movable rod 12 always presses against one end of the book block. After the positioning is completed, the first cylinder 16 works The second cylinder 19 is operated to drive the movable plate 17 to move together. After the adjustment is completed, the second cylinder 19 is started, and the second cylinder 19 drives the mounting plate 20 to move downward. At this time, the clamping plate 23 first contacts the surface of the book core, and the mounting plate 20 drives the printing plate 21 to continue to move downward. The reset spring 24 is compressed, and the printing plate 21 contacts the surface of the book core for printing. During the whole process, the clamping plate 23 presses one end of the book core to position the book core to prevent the book core from moving. This positioning mechanism realizes all-round positioning of the book core, and the positioning effect is good, ensuring that the position of the printed matter is accurate during each printing process.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A book block positioning mechanism for an offset printing press, comprising a support plate (1), characterized in that: The support plate (1) is provided with two first guide rails (2), and connecting shafts (3) are slidably connected in the two first guide rails (2), respectively. The bottom end of the support plate (1) is slidably connected with a cross bar (5), and the cross bar (5) is provided with a second guide rail (6), and the second guide rail (6) and the two connecting shafts (3) are mutually matched, and one end of the two connecting shafts (3) is fixedly connected to a limiting block (7).

2. The book block positioning mechanism for an offset printing press according to claim 1, characterized in that: One end of the two connecting shafts (3) away from the limit block (7) is fixedly connected to a clamping block (4), and a groove (26) is provided at the bottom end of the two clamping blocks (4). One end of the two clamping blocks (4) is fixedly connected to a slider (14). A movable rod (12) is provided on one side of the two clamping blocks (4), and a slide rail (13) is provided on the movable rod (12). The slide rail (13) is slidably connected to the two sliders (14).

3. The book block positioning mechanism for an offset printing press according to claim 1, characterized in that: The bottom end of the support plate (1) is fixedly connected to two mounting seats (8), one side of one of the mounting seats (8) is fixedly connected to a motor (9), an output end of the motor (9) is fixedly connected to a threaded rod (10), an end of the threaded rod (10) away from the motor (9) is provided with a bearing (11), the bearing (11) is fixedly connected to the mounting seat (8), the threaded rod (10) is threadedly connected to the cross bar (5), and the bottom end of the support plate (1) is fixedly connected to a plurality of support legs (25).

4. The book block positioning mechanism for an offset printing press according to claim 1, characterized in that: A fixed cover (15) is fixedly connected to the support plate (1), a first cylinder (16) is fixedly connected to the top of the fixed cover (15), a moving plate (17) is fixedly connected to the output end of the first cylinder (16), a second cylinder (19) is fixedly connected to the bottom end of the moving plate (17), and a through hole (18) is provided at the top of the fixed cover (15).

5. The book block positioning mechanism for an offset printing press according to claim 4, characterized in that: The output end of the second cylinder (19) is fixedly connected to a mounting plate (20), a side of the mounting plate (20) away from the second cylinder (19) is fixedly connected to a printed board (21), a fixing block (22) is provided on one side of the printed board (21), and the fixing block (22) is fixedly connected to the mounting plate (20).

6. The book block positioning mechanism for an offset printing press according to claim 5, characterized in that: One end of the fixed block (22) away from the mounting plate (20) is slidably connected to a clamping plate (23), and two return springs (24) are fixedly connected to the clamping plate (23), and the other end of the return spring (24) is fixedly connected to the fixed block (22).

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