Rotary printing device

Abstract

The utility model discloses a rotary printing device which comprises a printing plate roller and a pressing roller and further comprises two outer mounting frames used for mounting the printing plate roller and two inner mounting frames used for mounting the pressing roller. The two inner mounting frames are slidably connected to the inner sides of the two outer mounting frames so that the pressing roller can move in the direction close to or away from the printing plate roller in the vertical direction, an outer transverse plate is arranged between the tops of the two outer mounting frames, and an inner transverse plate is arranged between the tops of the two inner mounting frames. A limiting device used for limiting the inner transverse plate to move downwards is arranged between the outer transverse plate and the inner transverse plate. When loss is formed in use, the compression roller can descend due to the gravity of the compression roller to be attached to the forme roller, and the phenomenon that the quality of printed matter is affected due to a gap generated between the compression roller and the forme roller due to loss is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, and particularly relates to a rotary printing device. Background Art

[0002] In a rotary printing device, as a core processing unit, the installation structure of the pressure roller has a crucial impact on the overall operation effect in terms of stability and durability. The existing installation structure of the pressure roller mainly consists of a bearing, a bearing seat and a pressure roller body. As a key connecting component, the inner ring of the bearing is closely fitted with the journal of the pressure roller, while the outer ring is fixed on the bearing seat, forming a stable rotating support system. The bearing seat not only provides support for the outer ring of the bearing, but also ensures the rigidity and precision of the whole system through its structural design.

[0003] With the long-term use of the pressure roller, wear problems will inevitably occur. This is mainly due to the following aspects: (1) Material properties: Properties such as the hardness, density, speed, temperature, humidity and particle size of the material will directly affect the wear of the pressure roller. For example, materials with high hardness and density will exacerbate the wear of the pressure roller, and high temperature and excessive humidity will also accelerate the wear process. (2) Operating conditions: Factors such as the pressure, rotational speed and working time that the pressure roller is subjected to during the working process will also have an impact on wear. Excessive pressure or too high rotational speed may exacerbate the wear of the pressure roller. (3) Installation and maintenance: Improper installation and lack of necessary maintenance are also important reasons for the wear of the pressure roller. For example, improper installation of the bearing, insufficient lubrication or poor sealing may accelerate the damage of the pressure roller.

[0004] When the pressure roller wears due to long-term use, the gap between it and the mating parts (such as bearings, bearing seats, etc.) will gradually increase. This increase in the gap will bring a series of adverse consequences: (1) Uneven pressure distribution: The increase in the gap will cause uneven pressure distribution of the pressure roller during the operation process, thus affecting the processing quality of the product. (2) Decrease in processing accuracy: Due to the existence of the gap, the pressure roller may wobble or vibrate during rotation, thereby reducing the processing accuracy. (3) Increase in noise and vibration: The increase in the gap will exacerbate the noise and vibration levels of the equipment, causing adverse effects on both the production environment and the equipment itself. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a rotary printing and pressing device that can form corresponding compensation for the wear of its supporting pressure roller.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is: to provide a rotary printing device, including a printing plate roller and a pressure roller, further including two outer mounting frames for mounting the printing plate roller and two inner mounting frames for mounting the pressure roller. The two inner mounting frames are slidably connected to the inner sides of the two outer mounting frames so that the pressure roller moves in a vertical direction towards or away from the printing plate roller. An outer cross plate is provided between the tops of the two outer mounting frames, an inner cross plate is provided between the tops of the two inner mounting frames, and a limiting device for restricting the downward movement of the inner cross plate is provided between the outer cross plate and the inner cross plate.

[0007] Further, vertical chutes are provided on both of the two outer mounting frames, and sliding blocks slidably engaged with the chutes are provided on one side of the two inner mounting frames facing the chutes. The sliding blocks are slidably engaged with the chutes so that the two inner mounting frames are slidably connected to the two outer mounting frames in the vertical direction.

[0008] Further, the limiting device includes a connecting plate and a limiting bolt. One end of the connecting plate is fixedly connected to one side of the outer cross plate, and the limiting bolt is threadedly connected to the other end of the connecting plate and abuts against the bottom surface of the inner cross plate to restrict the downward movement of the inner cross plate.

[0009] Further, outer ear frames are fixedly connected to one side of both of the two outer mounting frames, and hydraulic support rods are hinged to one side of the two inner mounting frames close to the outer ear frames. The end of the hydraulic support rod away from the inner mounting frame is rotatably connected to the outer ear frame.

[0010] Further, a stepped bolt is threadedly connected to the end of the hydraulic support rod away from the inner mounting frame. The stepped bolt has a threaded section adapted to the hydraulic support rod and a smooth rod section adapted to the connection hole. After the threaded section on the stepped bolt is threadedly connected to the hydraulic support rod, the smooth rod section is rotatably connected to the outer ear frame.

[0011] Further, a downward pressing assembly for pressing the inner cross plate to drive the pressure roller to approach the printing plate roller is provided on the outer cross plate.

[0012] Further, the downward pressing assembly includes a threaded rod, a telescopic spring, and a pushing block. The threaded rod is screwed in the outer cross plate in the vertical direction. One end of the telescopic spring is fixedly connected to the lower end of the threaded rod, the other end of the telescopic spring is fixedly connected to the top end of the pushing block, and the bottom end of the pushing block abuts against the top end of the inner cross plate.

[0013] Further, a knob part is provided at the top of the threaded rod.

[0014] Further, a plurality of connecting rods are provided between the two outer mounting frames.

[0015] Further, two mounting feet are provided at the bottom of each of the two outer mounting frames, and mounting holes are formed in all four of the mounting feet.

[0016] In the use of a rotary die-cutting and printing device of the present utility model, first, the pressure roller and the printing plate roller are separated to form a gap for the printing material to pass through. At this time, the limiting device is used to prevent the pressure roller from falling due to its own gravity. After the printing material passes through, the limiting bolt is loosened to allow the pressure roller to fall. When a gap is formed due to wear during the cooperation between the printing plate roller and the pressure roller, since the inner mounting frame is slidably connected to the outer mounting frame, the pressure roller will slide downward due to its own gravity to ensure that it always fits with the printing plate roller. At the same time, the downward pressing assembly can prevent the pressure roller from jittering upward during operation, ensuring the processing stability of the cooperation between the pressure roller and the printing plate roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0018] Figure 2 is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0019] Figure 3 is a schematic diagram of the structure of the inner mounting frame and the inner horizontal plate in an embodiment of the present utility model.

[0020] Figure 4 is a schematic diagram of the structure of the downward pressing assembly in an embodiment of the present utility model.

[0021] The meanings of the reference numerals in the drawings are as follows: printing plate roller 1; pressure roller 2; outer mounting frame 3; sliding groove 31; outer ear frame 32; connecting rod 33; mounting foot 34; inner mounting frame 4; slider 41; hydraulic support rod 42; stepped bolt 421; threaded section 4211; smooth rod section 4212; outer horizontal plate 5; inner horizontal plate 6; limiting device 7; connecting plate 71; limiting bolt 72; downward pressing assembly 8; threaded rod 81; knob portion 811; threaded sleeve 82; telescopic spring 82; push block 83. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following is a more detailed description through specific embodiments:

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, the utility model provides a rotary printing device, which includes a printing plate roller 1, a pressure roller 2, two outer mounting frames 3 for mounting the printing plate roller 1, and two inner mounting frames 4 for mounting the pressure roller 2. The two inner mounting frames 4 are slidably connected to the inner sides of the two outer mounting frames 3 so that the pressure roller 2 can move vertically towards or away from the printing plate roller 1. An outer cross plate 5 is arranged between the tops of the two outer mounting frames 3, an inner cross plate 6 is arranged between the tops of the two inner mounting frames 4, and a limiting device 7 for restricting the downward movement of the inner cross plate 6 is arranged between the outer cross plate 5 and the inner cross plate 6. When the pressure roller 2 is worn, it can descend due to its own gravity and fit with the printing plate roller 1, preventing the gap between the pressure roller 2 and the printing plate roller 1 caused by wear from affecting the quality of printed products.

[0024] The two outer mounting frames 3 are arranged oppositely. In order to fix the two outer mounting frames 3, two mounting feet 34 are arranged at the bottoms of the two outer mounting frames 3, and mounting holes 341 are opened on the four mounting feet 34. After the positions of the two outer mounting frames 3 are adjusted, the two outer mounting frames 3 are locked and fixed by inserting fixing nuts into the mounting holes 341. Since the printing plate roller is rotatably connected between the two outer mounting frames 3, to avoid the shaking of the printing plate roller 1 during operation due to the insufficient stability of the two outer mounting frames 3, several connecting rods 33 are arranged between the two outer mounting frames 3. In this embodiment, two connecting rods 33 are arranged, and the two connecting rods 33 are both arranged on the mounting feet 34. Since the outer cross plate 5 is arranged at the tops of the two outer mounting frames 3, a triangular stable structure composed of the outer cross plate 5 and the two connecting rods 33 can make the connection stability between the two outer mounting frames 3 higher and the integrity stronger.

[0025] In order to enable the inner mounting frame 4 to be slidably connected to the two outer mounting frames 3, vertical sliding grooves 31 are arranged on the two outer mounting frames 3, and sliding blocks 41 that are slidably matched with the sliding grooves 31 are arranged on one side of the two inner mounting frames 4 facing the sliding grooves 31. The sliding blocks 41 are slidably matched with the sliding grooves 31 so that the two inner mounting frames 4 are slidably connected to the two outer mounting frames 3 in the vertical direction. During use, the sliding blocks 41 are slidably arranged in the sliding grooves 31. Since the pressure roller is mounted on the two inner mounting frames 4, the sliding of the two inner mounting frames 4 can be restricted by the cooperation of the sliding blocks 41 and the sliding grooves 31, so that it can only slide vertically along the outer mounting frames 3. At this time, the pressure roller 2 can also only slide vertically, preventing the pressure roller 2 from shifting.

[0026] Since the pressure roller 2 will move towards the plate cylinder 1 due to gravity, when the pressure roller 2 is fully attached to the plate cylinder 1, the printed material cannot pass through. Therefore, it is necessary to ensure a relative distance that allows normal rotation and operation between the plate cylinder 1 and the pressure roller 2 that has not yet suffered wear through the limiting device 7. Specifically, the limiting device 7 includes a connecting plate 71 and a limiting bolt 72. One end of the connecting plate 71 is fixedly connected to one side of the outer cross plate 5, and the limiting bolt 72 is threadedly connected to the other end of the connecting plate 71 and abuts against the bottom surface of the inner cross plate 6 to limit the downward movement of the inner cross plate 6. Before use, first lift the inner cross plate 6 upward, and abut the inner cross plate 6 with the limiting bolt 72 to limit the falling of the inner cross plate 6. Since the inner cross plate 6 is arranged between the two inner mounting brackets 4, the two inner mounting brackets 4 cannot move either. Thus, the position of the pressure roller 2 can be limited. After the printed material passes through the gap between the pressure roller 2 and the plate cylinder 1, rotate the limiting bolt 72 to disengage it from the inner cross plate 6. At this time, the pressure roller 2 moves downward due to gravity until it abuts against the printed material.

[0027] In order to avoid the pressure roller 3 directly falling due to gravity and colliding strongly with the plate cylinder 2 when the limiting bolt 72 is disengaged from the inner cross plate 6, in this embodiment, outer ear brackets 32 are fixedly connected to one side of the two outer mounting brackets 3, and hydraulic support rods 42 are hinged to one side of the two inner mounting brackets 4 close to the outer ear brackets 32. The end of the hydraulic support rod 42 away from the inner mounting bracket 4 is rotatably connected to the outer ear bracket 32. When the limiting bolt 72 is disengaged from the inner cross plate 6, due to the support of the hydraulic support rod 42, the inner mounting bracket 4 will be supported, causing the two inner mounting brackets 4 to slowly descend until the pressure roller 2 abuts against the plate cylinder 1. A stepped bolt 421 is threadedly connected to the end of the hydraulic support rod 42 away from the inner mounting bracket 4. The stepped bolt 421 has a threaded section 4211 adapted to the hydraulic support rod 42 and a smooth rod section 4212 adapted to the connecting hole. After the threaded section 4211 on the stepped bolt 421 is threadedly connected to the hydraulic support rod 42, the smooth rod section 4212 is rotatably connected to the outer ear bracket 32. Through this design, during the descent of the inner mounting bracket 4, since the two ends of the hydraulic support rod 42 are respectively hinged to the inner mounting bracket 4 and rotatably connected to the outer ear bracket 32, the hydraulic support rod 42 can cooperate with the inner mounting bracket 4 to move.

[0028] During the printing process, since the longitudinal limit is not applied to the pressure roller 2, the pressure roller 2 will jump upward during operation, which affects printing. Therefore, a downward pressing assembly 8 is provided on the outer horizontal plate 5 for pressing the inner horizontal plate 5 to drive the pressure roller 2 to approach the printing plate roller 1. Specifically, the downward pressing assembly 8 includes a threaded rod 81, a telescopic spring 82, and a push block 83. The threaded rod 81 is screwed in the outer horizontal plate 5 in the vertical direction. One end of the telescopic spring 82 is fixedly connected to the lower end of the threaded rod 81, and the other end of the telescopic spring 82 is fixedly connected to the top end of the push block 83. The bottom end of the push block 83 abuts against the top end of the inner horizontal plate 6. By abutting the push block 83 against the inner horizontal plate 6, the upward movement of the inner horizontal plate 6 can be restricted, and thus the upward movement of the pressure roller 3 can be restricted. The elastic force of the telescopic spring 82 can form a certain buffering effect on the acting force on the inner horizontal plate 6. When the pressure roller 2 becomes loose, the operator can rotate the threaded rod 81 to move it in the direction of the pressure roller 2. At this time, the push block 83 will abut against the inner horizontal plate 6 more tightly, thereby preventing the pressure roller 2 from becoming loose. For the convenience of the operator to adjust, a knob portion 811 is provided at the top of the threaded rod 81.

[0029] The above are only the embodiments of the present invention. Common knowledge such as the specific structures and characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, which will not affect the implementation effect of the present invention and the practicality of the present invention.

Claims

1. A rotary printing device, comprising a printing plate roller and a pressure roller, characterized in that: It further includes two outer mounting brackets for mounting the plate cylinder and two inner mounting brackets for mounting the pressure roller. The two inner mounting brackets are slidably connected to the inner sides of the two outer mounting brackets so that the pressure roller can move in the vertical direction towards or away from the plate cylinder. An outer cross plate is provided between the tops of the two outer mounting brackets, an inner cross plate is provided between the tops of the two inner mounting brackets, and a limiting device for restricting the downward movement of the inner cross plate is provided between the outer cross plate and the inner cross plate.

2. The rotary die printing device according to claim 1, characterized in that: Vertical chutes are provided on both of the two outer mounting brackets, and sliders slidably engaged with the chutes are provided on one side of the two inner mounting brackets facing the chutes. The sliders are slidably engaged with the chutes so that the two inner mounting brackets are slidably connected to the two outer mounting brackets in the vertical direction.

3. A rotary die printing device according to claim 1, characterized in that: The limiting device includes a connecting plate and a limiting bolt. One end of the connecting plate is fixedly connected to one side of the outer cross plate, and the limiting bolt is threadedly connected to the other end of the connecting plate and abuts against the bottom surface of the inner cross plate to restrict the downward movement of the inner cross plate.

4. A rotary die printing device according to claim 1, characterized in that: Outer ear brackets are fixedly connected to one side of both of the two outer mounting brackets, and hydraulic support rods are hinged to one side of the two inner mounting brackets close to the outer ear brackets. The end of the hydraulic support rod away from the inner mounting bracket is rotatably connected to the outer ear bracket.

5. The rotary die printing device according to claim 4, characterized in that: A stepped bolt is threadedly connected to the end of the hydraulic support rod away from the inner mounting bracket. The stepped bolt has a threaded section adapted to the hydraulic support rod and a smooth rod section adapted to the connecting hole. After the threaded section on the stepped bolt is threadedly connected to the hydraulic support rod, the smooth rod section is rotatably connected to the outer ear bracket.

6. The rotary die printing device according to claim 1, wherein: A downward pressing assembly for pressing the inner cross plate to drive the pressure roller to approach the plate cylinder is provided on the outer cross plate.

7. A rotary die printing device according to claim 6, characterized in that: The downward pressing assembly includes a threaded rod, a telescopic spring and a pushing block. The threaded rod is screwed in the outer cross plate in the vertical direction. One end of the telescopic spring is fixedly connected to the lower end of the threaded rod, the other end of the telescopic spring is fixedly connected to the top end of the pushing block, and the bottom end of the pushing block abuts against the top end of the inner cross plate.

8. A rotary die printing device according to claim 7, characterized in that: A knob portion is provided at the top of the threaded rod.

9. A rotary die printing device according to claim 1, wherein: A number of connecting rods are provided between the two outer mounting brackets.

10. A rotary die printing device according to claim 1, characterized in that: Two mounting feet are provided at the bottom of both of the two outer mounting brackets, and mounting holes are provided in all four mounting feet.

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