Paper leveling device of printing machine

Abstract

The utility model discloses a paper leveling device of a printing machine, which is mounted at the front end of the printing machine and comprises a supporting machine body, a flattening mechanism and a flattening mechanism, and the flattening mechanism and the flattening mechanism are mounted on the supporting machine body. The supporting machine body comprises two supporting plates, a paper roller is installed between the two supporting plates, and paper on the paper roller sequentially passes through the flattening mechanism and the flattening mechanism so as to flatten paper wrinkles. The number of the flattening mechanisms is two, the two flattening mechanisms clamp the paper, each flattening mechanism comprises a roller body, a positioning roller arranged in the middle of the roller body and flattening rollers arranged on the two sides of the roller body, the flattening rollers rotate to extend the paper abutting against the flattening rollers, and wrinkles in the paper are flattened by stretching the two sides of the paper. The flattening mechanism comprises a pressing table and a pressing plate, the pressing plate has elastic extrusion force on the paper on the surface of the pressing table, shaping and pressing of the flattened paper are achieved, and the flattening effect on the paper is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of paper printing and leveling, and in particular relates to a paper leveling device for a printing press. Background Art

[0002] A printing press is a machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate loading, inking, pressing, and paper feeding. Its principle is to first make the text or image to be printed into a printing plate, install it on the printing press, and then apply ink to the place where the text and image are on the printing plate manually or by the printing machine, and then directly or indirectly transfer it to paper or other substrates.

[0003] When a printing press is printing, it is necessary to ensure that the paper put into the printing press remains flat. Since the paper itself may have some wrinkles, the paper needs to be flattened before entering the printing press for printing. The printing press paper flattening device in the prior art generally adopts a double roller structure to achieve the paper flattening operation, but the double roller extrusion flattening has a poor flattening effect, and the wrinkles on the paper are easily squeezed by the pressure roller and the paper is prone to cracks. Utility Model Content

[0004] In view of the above-mentioned shortcomings, the utility model provides a printing press paper flattening device, which is designed with a flattening mechanism. The flattening rollers on both sides of the roller body rotate to stretch the two sides of the paper, thereby extending the wrinkles on the inner side of the paper. A flattening mechanism is designed behind the flattening mechanism to squeeze and shape the extended paper, thereby improving the flattening effect of the paper.

[0005] The utility model is realized by the following technical solutions:

[0006] A printing press paper flattening device is installed at the front end of the printing press, and the flattening device includes a support body and a flattening mechanism and a flattening mechanism installed on the support body. The support body includes two support plates, and a paper roller is installed between the two support plates. The paper on the paper roller passes through the flattening mechanism and the flattening mechanism in sequence to flatten the wrinkles of the paper. There are two groups of flattening mechanisms, and the two groups of flattening mechanisms clamp the paper. The flattening mechanism includes a roller body, a positioning roller arranged in the middle of the roller body, and flattening rollers arranged on both sides of the roller body. The flattening roller rotates to extend the paper abutting against the flattening roller, and the wrinkles in the paper are flattened by stretching both sides of the paper. The flattening mechanism includes a pressing platform and a pressing plate. The pressing plate has an elastic squeezing force on the paper on the surface of the pressing platform to achieve shaping and pressing of the flattened paper, thereby improving the flattening effect of the paper.

[0007] Furthermore, the flattening rollers are mounted to the roller body through polygonal brackets. The flattening rollers are evenly distributed along the circumferential direction of the roller body. The diameter of the flattening rollers gradually decreases from the middle to both sides. On the cross section of the roller body passing through the polygonal bracket, the outer arc edges of each flattening roller are located on the same circle, thereby achieving the extension of the wrinkles on the paper.

[0008] Furthermore, the flattening roller is equipped with a micro motor, which can drive the flattening roller to rotate around its own axis, thereby providing power support for the rotation of the flattening roller.

[0009] Furthermore, the flattening roller also includes a controller, which can control the start-up state of each micro motor to control the rotation speed and start-up time of the flattening roller.

[0010] Furthermore, the two flattening rollers are symmetrically distributed relative to the positioning roller, and the maximum radius of the flattening roller and the positioning roller are consistent, so as to reduce the movement resistance of the paper between the two flattening mechanisms.

[0011] Furthermore, a rubber coating is attached to the outer peripheral surface of the positioning roller to increase the friction between the positioning roller and the paper, so as to facilitate the movement of the paper and drive the positioning roller to rotate.

[0012] Furthermore, a vertically arranged strip hole is opened on the support plate, and sliders cooperating with the strip hole are provided on both sides of the pressure plate, and a tension spring is installed between the slider and the bottom wall of the strip hole to realize the elastic connection between the pressure plate and the support plate.

[0013] Furthermore, the length of the pressing plate is greater than the width of the paper, and a guide arc surface is provided on the side of the pressing plate close to the paper. Along the traveling direction of the paper, the distance between the guide arc surface and the paper gradually decreases, making it easier for the paper to enter the flattening gap between the pressing plate and the pressing platform.

[0014] Furthermore, the flattening device also includes a driving mechanism, which is mounted between the two support plates and is located on a side of the support body close to the printing press to provide power support for the paper to pass through the flattening mechanism and the flattening mechanism.

[0015] Furthermore, the driving mechanism includes a driving roller and a driven roller, the driving roller and the driven roller clamp the paper, and a driving gap for driving the paper to move is formed between the driving roller and the driven roller.

[0016] Beneficial effects of the utility model:

[0017] 1. By designing a flattening mechanism, the flattening rollers on both sides of the roller body rotate to stretch both sides of the paper, thereby extending the wrinkles on the inner side of the paper;

[0018] 2. A flattening mechanism is designed behind the flattening mechanism to squeeze and shape the extended paper and improve the flattening effect of the paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A connection diagram for illustrating a schematic implementation of a paper flattening device for a printing press in the utility model;

[0020] Figure 2A schematic structural diagram for illustrating a schematic implementation of a paper flattening device for a printing press in the utility model;

[0021] Figure 3 A cross-sectional view for illustrating a schematic implementation of a paper flattening device for a printing press in the utility model;

[0022] Figure 4 To illustrate Figure 3 A partial enlarged schematic diagram in the middle.

[0023] List of parts and reference numerals:

[0024] 1. Support body; 11. Support plate; 111. Strip hole; 2. Flattening mechanism; 21. Roller body; 22. Positioning roller; 23. Flattening roller; 231. Outer arc edge; 24. Polygonal bracket; 3. Flattening mechanism; 31. Pressing table; 32. Pressing plate; 321. Sliding block; 322. Tension spring; 323. Guide arc surface; 4. Paper roller; 41. Paper; 5. Driving mechanism; 51. Driving roller; 52. Driven roller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0027] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention are not only changes in position, but also include movements such as rotation and rolling where there is no relative change in position but a change in state.

[0028] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.

[0029] like Figures 1 to 4A printing press paper flattening device is shown, which is installed at the front end of the printing press. The flattening device includes a support body 1 and a flattening mechanism 2 and a flattening mechanism 3 installed on the support body 1. The support body 1 includes two support plates 11, and a paper roller 4 is installed between the two support plates 11. The paper 41 of the paper roller 4 passes through the flattening mechanism 2 and the flattening mechanism 3 in sequence to flatten the wrinkles of the paper 41. There are two groups of flattening mechanisms 2, and the two groups of flattening mechanisms 2 clamp the paper 41. The flattening mechanism 2 includes a roller body 21, a positioning roller 22 arranged in the middle of the roller body 21, and flattening rollers 23 arranged on both sides of the roller body 21. The flattening rollers 23 rotate to extend the paper 41 abutting against the flattening rollers 23, and the wrinkles in the paper 41 are flattened by stretching both sides of the paper 41. The flattening mechanism 3 includes a press platform 31 and a press plate 32 . The press plate 32 has an elastic squeezing force on the paper 41 on the surface of the press platform 31 , thereby achieving shaping and pressing of the flattened paper 41 and improving the flattening effect of the paper 41 .

[0030] In one embodiment, first, the paper 41 on the paper roller 4 is pulled out, and the paper 41 is passed through the flattening mechanism 2 and the flattening mechanism 3 in sequence, and the paper 41 is installed on the printing press. When the printing press is started, the paper 41 on the paper roller 4 is pulled through the flattening mechanism 2 and the flattening mechanism 3 to move to the printing press. When the paper 41 passes through the flattening mechanism 2, the paper 41 drives the positioning roller 22 pressed to the center of the paper 41 to rotate, thereby driving the entire flattening mechanism 2 to rotate. Synchronously, the two flattening rollers 23 of the roller body 21 rotate slowly around their own axes driven by the micro motor. The flattening roller 23 rotates to straighten and flatten the wrinkles on the paper 41 between the flattening roller 23 and the positioning roller 22, that is, the portion of the paper 41 abutting against the flattening roller 23 is subjected to the tensile force of the flattening roller 23 on the paper 41 toward the outside of the paper 41. After passing through the flattening mechanism 2 , the paper 41 flows to the flattening mechanism 3 . The pressing plate 32 has an elastic squeezing force on the paper 41 to press the paper 41 to the surface of the pressing platform 31 , thereby shaping the flattened paper 41 and improving the flattening effect of the paper 41 .

[0031] Preferably, the flattening rollers 23 are mounted to the roller body 21 via a polygonal bracket 24. The flattening rollers 23 are evenly distributed along the circumferential direction of the roller body 21. The diameter of the flattening rollers 23 gradually decreases from the middle to both sides. On the cross section of the roller body 21 passing through the polygonal bracket 24, the outer arc edges 231 of each flattening roller 23 are located on the same circle, thereby achieving the extension of the wrinkles on the paper 41.

[0032] In one embodiment, if Figure 4As shown, the outer arc edges 231 of each flattening roller 23 are all located on the same circle, that is, when the flattening roller 23 abuts against the paper 41, the positioning roller 22 also abuts against the paper 41, and each flattening roller 23 can also rotate to achieve stretching and flattening of the paper 41. It should be noted that the flattening mechanism 2 is provided on both the upper and lower sides of the paper 41, and the flattening mechanism 2 is symmetrically distributed relative to the paper 41.

[0033] Preferably, the flattening roller 23 is equipped with a micro motor, which can drive the flattening roller 23 to rotate around its own axis, thereby providing power support for the rotation of the flattening roller 23 .

[0034] Preferably, the flattening roller 23 further includes a controller, which can control the start-up state of each micro motor to control the rotation speed and start-up time of the flattening roller 23 .

[0035] In one embodiment, in order to save the power of each micro motor, the controller calculates the rotation speed of the roller body 21 according to the moving speed of the paper 41, and then determines which flattening roller 23 is in contact with the paper 41, and starts the flattening roller 23 to rotate. That is, the flattening rollers 23 are not started synchronously, and the controller can control only the flattening roller 23 in contact with the paper 41 to rotate, and the other flattening rollers 23 are on standby, thereby saving the power of the flattening rollers 23.

[0036] Preferably, the two flattening rollers 23 are symmetrically distributed relative to the positioning roller 22 , and the maximum radius of the flattening roller 23 and the positioning roller 22 are consistent, so as to reduce the movement resistance of the paper 41 between the two flattening mechanisms 2 .

[0037] Preferably, a rubber coating is attached to the outer peripheral surface of the positioning roller 22 to increase the friction between the positioning roller 22 and the paper 41 , so as to facilitate the movement of the paper 41 and drive the positioning roller 22 to rotate.

[0038] In one embodiment, a rubber coating is attached to the outer circumference of the positioning roller 22, so that the paper 41 drives the positioning roller 22 to rotate, and then drives the entire roller body 21 to rotate. In fact, the positioning roller 22 and the flattening roller 23 in contact with the paper 41 can both drive the roller body 21 to rotate around its own axis, and the positioning roller 22 is the main function. While the flattening roller 23 rotates around the axis of the roller body 21, it can also rotate around its own axis. The friction between the flattening roller 23 and the paper 41 is smaller than the friction between the positioning roller 22 and the paper 41.

[0039] In one embodiment, a driving motor can be installed at the end of the roller body 21 to drive the roller 51 to rotate and make the rotation speed of the roller body 21 match the moving speed of the paper 41, that is, the linear speed of the positioning roller 22 is consistent with the moving speed of the paper 41.

[0040] Preferably, a vertically arranged strip hole 111 is opened on the support plate 11, and sliders 321 cooperating with the strip hole 111 are provided on both sides of the pressure plate 32, and a tension spring 322 is installed between the slider 321 and the bottom wall of the strip hole 111 to realize the elastic connection between the pressure plate 32 and the support plate 11.

[0041] In one embodiment, the tension spring 322 exerts a vertical downward elastic pulling force on the pressing plate 32 , so that the pressing plate 32 exerts a squeezing force on the paper 41 located on the surface of the pressing platform 31 , thereby achieving shaping and flattening of the paper 41 .

[0042] Preferably, the length of the pressure plate 32 is greater than the width of the paper 41, and a guide arc surface 323 is provided on the side of the pressure plate 32 close to the paper 41. Along the moving direction of the paper 41, the distance between the guide arc surface 323 and the paper 41 gradually decreases, so as to facilitate the paper 41 to enter the flattening gap between the pressure plate 32 and the pressing platform 31.

[0043] Preferably, the flattening device further comprises a driving mechanism 5 , which is mounted between the two support plates 11 and is located on a side of the support body 1 close to the printing press, to provide power support for the paper 41 to pass through the flattening mechanism 2 and the pressing mechanism 3 .

[0044] In one embodiment, in order to reduce the tensile force of the printing press on the paper 41, a driving mechanism 5 is also installed on the support plate 11. The driving mechanism 5 has a pulling force on the paper 41 to ensure that the paper 41 flows smoothly from the paper roller 4 to the printing press.

[0045] Preferably, the driving mechanism 5 includes a driving roller 51 and a driven roller 52 . The driving roller 51 and the driven roller 52 clamp the paper 41 , and a driving gap for driving the paper 41 to move is formed between the driving roller 51 and the driven roller 52 .

[0046] When the above-mentioned printing press paper flattening device is used, by designing the flattening mechanism 2, the flattening rollers 23 located on both sides of the roller body 21 rotate to stretch the two sides of the paper 41, thereby extending the wrinkles inside the paper 41. A flattening mechanism 3 is designed behind the flattening mechanism 2 to squeeze and shape the extended paper 41, thereby improving the flattening effect of the paper 41.

[0047] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A printing press paper leveling device, mounted to the front end of the printing press, characterized in that: The flattening device comprises a supporting body and a flattening mechanism and a flattening mechanism mounted on the supporting body; The support body comprises two support plates, a paper roller is installed between the two support plates, and the paper on the paper roller passes through the flattening mechanism and the flattening mechanism in sequence; The flattening mechanism is provided with two groups, and the two groups of the flattening mechanism clamp the paper, and the flattening mechanism includes a roller body, a positioning roller arranged in the middle of the roller body, and flattening rollers arranged on both sides of the roller body, and the flattening rollers rotate to extend the paper abutting against the flattening rollers; The flattening mechanism comprises a pressing platform and a pressing plate, wherein the pressing plate has an elastic pressing force on the paper on the surface of the pressing platform.

2. A printing press paper flattening device according to claim 1, characterized in that: The flattening rollers are mounted to the roller body via polygonal brackets. The flattening rollers are evenly distributed along the circumferential direction of the roller body. The diameters of the flattening rollers gradually decrease from the middle to both sides. On the cross section of the roller body passing through the polygonal bracket, the outer arc edges of each flattening roller are located on the same circle.

3. A printing press paper flattening device according to claim 1, characterized in that: The flattening roller is equipped with a micro motor, and the micro motor can drive the flattening roller to rotate around its own axis.

4. A printing press paper flattening device according to claim 3, characterized in that: The flattening roller further comprises a controller, and the controller is capable of controlling the start-up state of each of the micro motors.

5. The printing press paper flattening device according to claim 1, characterized in that: The two flattening rollers are symmetrically distributed relative to the positioning roller, and the maximum radius of the flattening roller is consistent with that of the positioning roller.

6. A printing press paper flattening device according to claim 1, characterized in that: A rubber coating is attached to the outer peripheral surface of the positioning roller.

7. A printing press paper flattening device according to claim 1, characterized in that: The support plate is provided with a vertically arranged strip hole, and both sides of the pressure plate are provided with sliders matched with the strip hole, and a tension spring is installed between the slider and the bottom wall of the strip hole.

8. The printing press paper flattening device according to claim 1, characterized in that: The length of the pressing plate is greater than the width of the paper. A guide arc surface is provided on a side of the pressing plate close to the paper. Along the traveling direction of the paper, the distance between the guide arc surface and the paper gradually decreases.

9. A printing press paper flattening device according to claim 1, characterized in that: The leveling device further comprises a driving mechanism, which is arranged between the two supporting plates and is located at a side of the supporting body close to the printing press.

10. A printing press paper flattening device according to claim 9, characterized in that: The driving mechanism comprises a driving roller and a driven roller, and the driving roller and the driven roller clamp the paper.

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