A paper positioning mechanism for a printing press

Abstract

This utility model discloses a paper positioning mechanism for a printing press, including a frame, a paper-pressing pulley assembly, a paper-clamping conveyor assembly, a paper-suction conveyor assembly, and a positioning adjustment assembly. The carrier plate is used to hold the paperboard to be printed, and the paper-pressing pulley assembly slides against the paperboard on the carrier plate. The paper-suction conveyor assembly is located at the side of the paper-clamping conveyor assembly and is used to absorb, convey, or release the paperboard transported from the paper-clamping conveyor assembly. The positioning adjustment assembly is located on both sides of the paper-suction conveyor assembly and is used to position and adjust the lateral position of the paperboard on the paper-suction conveyor assembly. This utility model uses the negative pressure of the paper-suction conveyor assembly to absorb the paperboard. When the position of the paperboard needs to be adjusted, the paper-suction conveyor assembly releases its suction, and the positioning adjustment assembly adjusts the lateral position of the paperboard. After adjustment, the paperboard is reabsorbed and conveyed to subsequent processes, thereby improving the positioning accuracy and conveying stability of the paperboard.

Description

Technical Field

[0001] This utility model relates to the field of paper positioning mechanisms, and more particularly to a paper positioning mechanism for printing presses. Background Technology

[0002] In printing equipment, the paper positioning mechanism is a device used to correct the position of the paper before it enters the printing unit, in order to eliminate the positional deviation of the paper during the transport process, improve the alignment accuracy of the paper in the longitudinal and transverse directions, and thus meet the positional requirements of the subsequent printed graphics.

[0003] In existing technologies, paper positioning mechanisms mostly adjust the paper through mechanical limits, guide wheels, or pressure plates. These mechanisms suffer from problems such as low positioning accuracy, limited adjustment methods, and a limited range of paper sizes that can be adapted. When positioning high-grammage, large-size paperboards, issues such as positional shifts and misalignment can easily occur, thus affecting the printing accuracy of the paper in subsequent processes.

[0004] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a paper positioning mechanism for printing presses that has a large paper size range and is not prone to positional deviation.

[0006] The technical solution of this utility model is as follows: a paper positioning mechanism for a printing press, including a frame, a paper pressing pulley assembly, a paper clamping and conveying assembly, a paper suction and conveying assembly, and a positioning adjustment assembly;

[0007] The frame is provided with a material carrier plate on its side, which is used to place the cardboard to be printed. The paper pressing pulley assembly is located above the material carrier plate and is used to slide against the cardboard on the material carrier plate.

[0008] The paper clamping and conveying assembly is mounted on the frame. The paper clamping and conveying assembly includes a first motor, a drive roller, and a driven roller. A gap is formed between the drive roller and the driven roller for the paperboard to pass through. The first motor is connected to the drive roller to drive the drive roller to rotate.

[0009] The paper suction and conveying assembly is located at the side end of the paper clamping and conveying assembly, and the paper suction and conveying assembly is used to absorb, convey, or release the cardboard transported and output from the paper clamping and conveying assembly.

[0010] The positioning adjustment components are located on both sides of the paper suction and conveying component, and the positioning adjustment components are used to position and adjust the lateral position of the paper on the paper suction and conveying component.

[0011] The positioning adjustment assembly includes a support frame, a push plate, a lead screw shaft, a threaded seat, and a second motor. The support frame is mounted on the machine frame, and the lead screw shaft is rotatably mounted on the support frame.

[0012] The threaded seat is sleeved on the lead screw shaft and connected to the push plate. The threaded seat is used to drive the push plate to move along the width direction of the frame as the lead screw shaft rotates.

[0013] The second motor is connected to the end of the lead screw shaft to drive the lead screw shaft to rotate.

[0014] Using the above technical solution, in the paper positioning mechanism for the printing press, the paper suction and conveying assembly includes a negative pressure fan, an air duct, an adsorption chamber seat, a conveyor belt, and a third motor;

[0015] The adsorption chamber seat is mounted on the frame. The top surface of the adsorption chamber seat is provided with several suction grooves. The conveyor belt surrounds the outside of the adsorption chamber seat, and the surface of the conveyor belt is provided with several adsorption holes corresponding to the positions of the suction grooves.

[0016] The conveyor belt is fitted with a drive roller and a driven roller at both ends, and the end of the drive roller is connected to the output shaft of the third motor. The third motor is used to drive the drive roller to rotate.

[0017] The negative pressure fan is located at the bottom of the frame and is connected to the bottom of the adsorption chamber seat through the air duct. The negative pressure fan is used to generate negative pressure airflow so that the cardboard is adsorbed onto the conveyor belt by negative pressure.

[0018] Using the above technical solution, in the paper positioning mechanism for a printing press, the paper pressing pulley assembly includes a mounting bracket, a sliding seat, and a pressure roller;

[0019] The mounting bracket is located above the material carrier plate. The mounting bracket has several guide rails along its width direction. The sliding seat is detachably mounted on the guide rails. The pressure roller is mounted on the sliding seat and is used to prevent the cardboard from tilting upwards during conveying.

[0020] Using the above technical solution, in the paper positioning mechanism for a printing press, the positioning adjustment component further includes guide rods, with two guide rods located at both ends of the lead screw shaft and sleeved and connected to the end of the push plate.

[0021] Using the above technical solution, in the paper positioning mechanism of the printing press, the width of the conveyor belt is greater than the width of the suction groove.

[0022] The paper positioning mechanism for the printing press, as described above, further includes a guide roller bracket, which is located on the paper output end of the frame and is used to support and transport the paperboard.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This invention, by setting a material carrier plate on the side of the frame and cooperating with a paper-pressing pulley assembly, can achieve light pressure and limit the paperboard, keeping the paperboard flat and stable before entering the paper clamping and conveying assembly, avoiding warping or displacement that would affect the conveying process. The paper clamping and conveying assembly can stably convey the paperboard to the paper suction conveying assembly, which uses negative pressure to adhere the paperboard to the conveyor belt. When the position of the paperboard needs to be adjusted, the paper suction conveying assembly can release the paperboard and adjust its lateral position through the positioning adjustment assembly. After adjustment, the paperboard is re-adsorbed and conveyed to the subsequent process. The entire positioning process is compact and effectively improves the positioning accuracy and conveying stability of the paperboard during the conveying process. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the paper pressing pulley assembly of this utility model;

[0029] Figure 3 This is a schematic diagram of the positioning and adjustment component structure of this utility model;

[0030] Figure 4 This is a partial structural diagram of the paper suction and conveying assembly of this utility model. Detailed Implementation

[0031] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 4 As shown, this embodiment provides a paper positioning mechanism for a printing press, including a frame 1, a paper pressing pulley assembly 2, a paper clamping and conveying assembly 3, a paper suction and conveying assembly 4, and a positioning and adjusting assembly 5. A material carrier plate 11 is provided on the side of the frame 1, and the material carrier plate 11 is used to place the paperboard to be printed. The paper pressing pulley assembly 2 is located above the material carrier plate 11 and is used to slide against the paperboard on the material carrier plate 11. The paper clamping and conveying assembly 3 is located on the frame 1 and includes a first motor 31, a drive roller 32, and a driven roller 33. A connection is formed between the drive roller 32 and the driven roller 33. There is a gap for the cardboard to pass through. The first motor 31 is connected to the drive roller 32 to drive the drive roller 32 to rotate. A paper pressing pulley assembly 2 is provided above the carrier plate 11 to pre-press and limit the cardboard, so that the cardboard is not easy to tilt or move during static or clamping. The paper clamping and conveying assembly 3 can achieve steady-state conveying of the cardboard through the clamping force between the drive roller 32 and the driven roller 33. Specifically, when the first motor 31 drives the drive roller 32 to rotate, the cardboard enters the gap under the guidance of the paper pressing pulley, is driven by the drive roller 32, and is conveyed through the contact action between the drive roller 33 and the driven roller 33.

[0035] The paper suction and conveying assembly 4 is located on the side of the paper clamping and conveying assembly 3. The paper suction and conveying assembly 4 is used to absorb, convey, or release the paperboard transported and output from the paper clamping and conveying assembly 3. The positioning and adjusting assembly 5 is located on both sides of the paper suction and conveying assembly 4. The positioning and adjusting assembly 5 is used to position and adjust the lateral position of the paper on the paper suction and conveying assembly 4. The positioning and adjusting assembly 5 includes a support frame 51, a push plate 52, a lead screw shaft 53, a threaded seat 54, and a second motor 55. The support frame 51 is located on the frame 1. The lead screw shaft 53 is rotatably mounted on the support frame 51. The threaded seat 54 is sleeved on the lead screw shaft 53 and connected to the push plate 52. The threaded seat 54 is used to drive the push plate 52 to move along the width direction of the frame 1 as the lead screw shaft 53 rotates. The second motor 55 is connected to the end of the lead screw shaft 53 to drive the lead screw shaft 53 to rotate. After the paperboard is output by the paper clamping and conveying assembly 3, if it directly enters the printing process, the printing effect may be affected if the paperboard is misaligned or skewed. The paper suction conveying assembly 4 is arranged at the exit of the paper clamping and conveying path. The paperboard can be suctioned by negative pressure. When the position of the paperboard needs to be adjusted, the paper suction conveying assembly 4 can release the paperboard, that is, release the suction state, so that the paperboard is in a free state that can move. At this time, the positioning adjustment assembly 5 can adjust the position of the paperboard. Specifically, when the second motor 55 drives the lead screw shaft 53 to rotate, the threaded seat 54 moves axially along the lead screw shaft 53, thereby driving the push plate 52 to move laterally in the width direction of the frame 1, and then pushing the paperboard to the set position. After the position of the paperboard is adjusted, the paper suction conveying assembly 4 turns on the negative pressure to re-suction the paperboard, so as to prevent it from being misaligned in the subsequent conveying process, and the paperboard is conveyed to the subsequent process by the conveyor belt 44, thereby improving the conveying and positioning accuracy of the paperboard.

[0036] like Figure 3 and Figure 4As shown, the paper suction and conveying assembly 4 further includes a negative pressure fan 41, an air duct 42, an adsorption chamber seat 43, a conveyor belt 44, and a third motor (not shown). The adsorption chamber seat 43 is mounted on the frame 1, and the top surface of the adsorption chamber seat 43 is provided with several suction grooves 430. The conveyor belt 44 surrounds the adsorption chamber seat 43, and the surface of the conveyor belt 44 is provided with several adsorption holes 440 corresponding to the positions of the suction grooves 430. The two ends of the conveyor belt 44 are respectively fitted with a drive roller shaft 441 and a driven roller shaft 442. The end of the drive roller shaft 441 is connected to the output shaft of the third motor, and the third motor is used to drive the drive roller shaft 441 to rotate. The negative pressure fan 41 is located at the bottom of the frame 1 and is connected to the bottom of the adsorption chamber seat 43 through the air duct 42. The negative pressure fan 41 is used to generate negative pressure airflow so that the paperboard is adsorbed onto the conveyor belt 44 by negative pressure. When the cardboard enters the paper suction and conveying assembly 4, the negative pressure airflow can act on the bottom surface of the cardboard through the suction groove 430 and the suction hole 440, so that the cardboard is firmly adsorbed on the surface of the conveyor belt 44, thereby achieving the bonding and fixing of the cardboard. Subsequently, the third motor drives the active roller 441 to rotate, and the active roller 441 drives the entire conveyor belt 44 to move in the set direction, so that the cardboard adsorbed on it is smoothly conveyed forward.

[0037] like Figure 1 and Figure 2 As shown, the paper-pressing pulley assembly 2 further includes a mounting bracket 21, a sliding seat 22, and a pressure roller 23. The mounting bracket 21 is located above the carrier plate 11 and has several guide rails 211 along its width. The sliding seat 22 is detachably mounted on the guide rails 211. The pressure roller 23 is mounted on the sliding seat 22 and is used to prevent the cardboard from tilting upwards during transport. When the cardboard is placed on the carrier plate 11, the pressure roller 23 can lightly press down on the upper surface of the cardboard by its own weight, allowing the cardboard to adhere to the carrier plate. As the paper-clamping conveying assembly 3 moves, the cardboard is gradually clamped and conveyed forward. During this process, the pressure roller 23 slides against the cardboard without interfering with its movement, while applying a certain adhesion pressure to the cardboard, thereby achieving stable transport of the cardboard.

[0038] like Figure 3 As shown, the positioning adjustment assembly 5 further includes guide rods 56. The two guide rods 56 are located at both ends of the lead screw shaft 53 and are sleeved and connected to the end of the push plate 52. The guide rods 56 can prevent the push plate 52 from tilting or swaying during movement.

[0039] Furthermore, the width of the conveyor belt 44 is greater than the width of the suction groove 430. This arrangement allows the width of the conveyor belt 44 to extend beyond the area of ​​the suction groove 430, which can support the cardboard outside the adsorption area, thereby improving the stability of the cardboard during the adsorption and conveying process.

[0040] like Figure 1 and Figure 2 As shown, it further includes a guide roller bracket 12, which is disposed on the paper output end of the frame 1 and is used to support the conveyed paperboard.

[0041] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A paper positioning mechanism for a printing press, characterized in that: Includes frame, paper pressing pulley assembly, paper clamping and conveying assembly, paper suction and conveying assembly, and positioning and adjustment assembly; The frame is provided with a material carrier plate on its side, which is used to place the cardboard to be printed. The paper pressing pulley assembly is located above the material carrier plate and is used to slide against the cardboard on the material carrier plate. The paper clamping and conveying assembly is mounted on the frame. The paper clamping and conveying assembly includes a first motor, a drive roller, and a driven roller. A gap is formed between the drive roller and the driven roller for the paperboard to pass through. The first motor is connected to the drive roller to drive the drive roller to rotate. The paper suction and conveying assembly is located at the side end of the paper clamping and conveying assembly, and the paper suction and conveying assembly is used to absorb, convey, or release the cardboard transported and output from the paper clamping and conveying assembly. The positioning adjustment components are located on both sides of the paper suction and conveying component, and the positioning adjustment components are used to position and adjust the lateral position of the paper on the paper suction and conveying component. The positioning adjustment assembly includes a support frame, a push plate, a lead screw shaft, a threaded seat, and a second motor. The support frame is mounted on the machine frame, and the lead screw shaft is rotatably mounted on the support frame. The threaded seat is sleeved on the lead screw shaft and connected to the push plate. The threaded seat is used to drive the push plate to move along the width direction of the frame as the lead screw shaft rotates. The second motor is connected to the end of the lead screw shaft to drive the lead screw shaft to rotate.

2. The paper positioning mechanism for a printing press according to claim 1, characterized in that: The paper suction and conveying assembly includes a negative pressure fan, an air duct, an adsorption chamber seat, a conveyor belt, and a third motor; The adsorption chamber seat is mounted on the frame. The top surface of the adsorption chamber seat is provided with several suction grooves. The conveyor belt surrounds the outside of the adsorption chamber seat, and the surface of the conveyor belt is provided with several adsorption holes corresponding to the positions of the suction grooves. The conveyor belt is fitted with a drive roller and a driven roller at both ends, and the end of the drive roller is connected to the output shaft of the third motor. The third motor is used to drive the drive roller to rotate. The negative pressure fan is located at the bottom of the frame and is connected to the bottom of the adsorption chamber seat through the air duct. The negative pressure fan is used to generate negative pressure airflow so that the cardboard is adsorbed onto the conveyor belt by negative pressure.

3. The paper positioning mechanism for a printing press of claim 1, wherein: The paper pressing pulley assembly includes a mounting bracket, a sliding seat, and a pressing roller; The mounting bracket is located above the material carrier plate. The mounting bracket has several guide rails along its width direction. The sliding seat is detachably mounted on the guide rails. The pressure roller is mounted on the sliding seat and is used to prevent the cardboard from tilting upwards during conveying.

4. The paper positioning mechanism for a printing press according to claim 1, characterized in that: The positioning adjustment assembly also includes guide rods, with two guide rods located at both ends of the lead screw shaft and sleeved and connected to the end of the push plate.

5. The paper positioning mechanism for a printing press of claim 2, wherein: The width of the conveyor belt is greater than the width of the suction trough.

6. The paper positioning mechanism for a printing press of claim 1, wherein: It also includes a guide roller bracket, which is located on the paper output end of the frame and is used to support and transport the paperboard.

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