Paper pressing device of printing machine

Abstract

The utility model discloses a printing machine paper pressing device which comprises a fixing seat, a short rotating arm, long rotating arms and a large shaft, two ends of the large shaft are respectively connected with the fixing seat in a rotating mode, the long rotating arms are fixed on the large shaft, a small shaft is arranged between the other ends of the long rotating arms, a bearing is arranged on a pin shaft of the small shaft, the large shaft is further provided with the short rotating arm, and the short rotating arm is connected with the short rotating arm. The short rotating arm is located on the outer side of the long rotating arm, a lower supporting plate is fixed to the side face of the short rotating arm, an upper pressing plate is connected to the fixing base through a screw, and an adjusting screw rod is arranged between the upper pressing plate and the lower supporting plate; a spring is arranged between the lower supporting plate and the upper pressing plate, an adjusting screw penetrates through the center of the spring, and an inner hexagonal hole is formed in one end of the adjusting screw. The number of the bearings is at least two, and the bearings are arranged at equal intervals. Paper pressing sheets are replaced by the bearings, so that the service life is prolonged, and paper damage is reduced; through the plum blossom handle, the problems of paper jam and the like in emergency can be more conveniently solved, and production can be quickly recovered.

Description

Technical Field

[0001] The utility model relates to the technical field of paper pressing of a printing machine, in particular to a paper pressing device for a printing machine. Background Technique

[0002] In order to ensure that the printed graphics and texts are flat and without curling during the paper transmission process, before the paper enters the offset printing machine for printing, the paper needs to be leveled first. Without damaging the paper, the paper feeding process is leveled through a paper pressing mechanism to ensure that the paper enters the subsequent processes such as printing smoothly.

[0003] The original paper pressing mechanism is as shown in the appendix Figure 3 It includes an operating surface paper passing board, side baffles, support plates, knurled nuts, side supports, supports, fixed square steels, paper pressing pieces, sliders, and gripper table boards. The paper enters from the right arrow, and after being leveled by the paper guiding board and the paper pressing piece and adjusted, it is picked up by the gripper teeth; among them, the fixed square steel, support, side support, support plate, etc. play a role in supporting the paper guiding board and the paper pressing piece, and the height of the paper pressing piece can be adjusted by adjusting the knurled nut; this kind of mechanism mainly has the following problems: First, the parts are complex and the cost is high; there are many sheet metal parts, and it is difficult to guarantee the accuracy; Second, it is difficult to guarantee the parallelism between the paper pressing piece and the gripper table board. If the parallelism is not good, only the side can press the paper, which is easy to scratch the paper; Third, the paper pressing piece wears quickly, needs to be adjusted or replaced frequently, and is relatively sharp after wear, which is easy to cut the paper. Chinese Patent Application No. 201810494812.4 discloses a paper pressing device for a printing machine, which includes a bracket, a pressing roller, and a telescopic motor. The top of the telescopic motor is fixedly arranged on the top plate. The pressing roller is used to make the paper closely fit with the printing roller. The fixed shaft can move up and down in the adjustment groove to adapt to papers of different thicknesses. When the paper is thicker, the pressing roller moves up, and the strong spring contracts. The set limit post can fix the fixed shaft to prevent deviation and improve the printing stability. By controlling the telescopic movement of the telescopic motor, the height of the pressing roller is adjusted. First, the use of the telescopic motor and the pressing roller results in high manufacturing cost, large volume, and limited installation position of the equipment. Therefore, there is an urgent need for improved technology in the market to solve the above problems. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects, provide a paper pressing device for a printing machine, replace the paper pressing piece with a bearing to improve the service life and reduce the damage to the paper; use a plum blossom handle to more conveniently handle problems such as paper jams in case of emergencies and quickly resume production; reduce the processing difficulty and cost, and can effectively solve the problems in the background technique.

[0005] To achieve the above object, the present utility model provides the following technical solution: A paper pressing device for a printing machine, comprising a fixed seat, a short rotating arm, a long rotating arm and a large shaft. Both ends of the large shaft are rotatably connected to the fixed seat. The long rotating arm is fixed on the large shaft. There are two long rotating arms. A small shaft is arranged between the other ends of the long rotating arms. A bearing is arranged on the pin shaft of the small shaft. A short rotating arm is also arranged on the large shaft. The short rotating arm is located outside the long rotating arm. A lower support plate is fixed on the side surface of the short rotating arm. An upper pressing plate is connected to the fixed seat by screws. An adjusting screw is arranged between the upper pressing plate and the lower support plate.

[0006] Further, a spring is arranged between the lower support plate and the upper pressing plate. The adjusting screw passes through the center of the spring. One end of the adjusting screw is provided with an internal hexagonal hole.

[0007] Further, at least two bearings are arranged, and the bearings are arranged at equal intervals.

[0008] Further, a pull rod is fixed on the lower support plate. The other end of the pull rod passes through the outside of the upper pressing plate, and a plum blossom handle is arranged at the other end of the pull rod.

[0009] Compared with the prior art, the beneficial effects of the present utility model are:

[0010] 1. The structure is simply designed, made of sheet metal parts, with low manufacturing cost. The spring is used to keep the position of the bearing stable and enable the bearing to play a role in flexibly pressing the paper, and it is not easy to damage the paper.

[0011] 2. When an accident occurs to the paper and the paper needs to be taken out, the plum blossom handle can more conveniently handle problems such as paper jams in case of emergencies and quickly resume production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the present utility model;

[0013] Figure 2 It is a left-view structural diagram of the present utility model;

[0014] Figure 3 It is a schematic diagram of the original paper pressing mechanism of the present utility model.

[0015] In the figure: 1 small shaft, 2 bearing, 3 long rotating arm, 4 large shaft, 5 short rotating arm, 6 fixed seat, 7 adjusting screw, 8 plum blossom handle, 9 upper pressing plate, 10 spring, 11 lower support plate, 12 pull rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0017] Please refer to Figures 1-3 , the present utility model provides a technical solution: a paper pressing device for a printing machine, including a fixed seat 6, a short rotating arm 5, a long rotating arm 3, and a large shaft 4. Both ends of the large shaft 4 are rotatably connected to the fixed seat 6. The long rotating arm 3 is fixed on the large shaft 4. There are two long rotating arms 3. A small shaft 1 is arranged between the other ends of the long rotating arms 3. Bearings 2 are arranged on the pin shaft of the small shaft 1. There are at least two bearings 2, and the bearings 2 are arranged at equal intervals. By using the bearings 2 instead of the paper pressing pieces, the bearings 2 are in contact with the paper in a rolling manner, which improves the service life and reduces the damage to the paper. A short rotating arm 5 is also arranged on the large shaft 4. The short rotating arm 5 is located outside the long rotating arm 3. The rotation of the short rotating arm 5 can drive the rotation of the large shaft 4, and the large shaft 4 drives the rotation of the long rotating arm 3 to achieve adjustment. A lower support plate 11 is fixed on the side of the short rotating arm 5. An upper pressing plate 9 is connected to the fixed seat 6 by screws. An adjusting screw 7 is arranged between the upper pressing plate 9 and the lower support plate 11. The lifting height of the small shaft 1 can be adjusted by the adjusting screw 7, and then the height of the bearings 2 can be adjusted to meet the use requirements.

[0018] A spring 10 is arranged between the lower support plate 11 and the upper pressing plate 9. The adjusting screw 7 passes through the center of the spring 10. One end of the adjusting screw 7 is provided with an internal hexagonal hole. The spring 10 is used to keep the position of the bearings 2 stable and make the bearings 2 play a role in flexibly pressing the paper, so as not to damage the paper easily.

[0019] A pull rod 12 is fixed on the lower support plate 11. The other end of the pull rod 12 passes through the outside of the upper pressing plate 9, and a plum blossom handle 8 is arranged at the other end of the pull rod 12. When an accidental failure occurs to the paper and the paper needs to be taken out, the lower support plate 11 can be driven to move by pulling up the plum blossom handle 8 upward. The lower support plate 11 drives the short rotating arm 5 and the long rotating arm 3 to rotate around the large shaft 4, so that the bearings 2 are lifted upward, which is convenient for taking out the paper.

[0020] Working principle: Zhang enters from the right arrow direction and is leveled through multiple bearings 2; by adjusting the screw rod 7, the lower support plate 11 is driven to move, and the lower support plate 11 drives the short rotating arm 5 and the long rotating arm 3 to rotate around the large shaft 4, thereby adjusting the height of the bearing 2; the spring 10 is used to keep the position of the bearing 2 stable and enable the bearing 2 to play a role in flexibly pressing the paper, so that the paper is not easily damaged; when an unexpected failure occurs to the paper and the paper needs to be taken out, the lower support plate 11 can be driven to move by pulling up the plum blossom handle 8, and the lower support plate 11 drives the short rotating arm 5 and the long rotating arm 3 to rotate around the large shaft 4, so that the bearing 2 is lifted upward, facilitating the taking out of the paper.

[0021] The above shows and describes the basic principles, main features and advantages of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model has various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A paper pressing device for a printing machine, comprising a fixed seat (6), a short rotating arm (5), a long rotating arm (3) and a large shaft (4), characterized in that: Both ends of the large shaft (4) are rotatably connected to the fixed seat (6). The long rotating arm (3) is fixed on the large shaft (4). There are two long rotating arms (3). A small shaft (1) is arranged between the other ends of the long rotating arms (3). A bearing (2) is arranged on the pin shaft of the small shaft (1). A short rotating arm (5) is also arranged on the large shaft (4). The short rotating arm (5) is located outside the long rotating arm (3). A lower support plate (11) is fixed on the side surface of the short rotating arm (5). An upper pressing plate (9) is connected to the fixed seat (6) by screws. An adjusting screw rod (7) is arranged between the upper pressing plate (9) and the lower support plate (11).

2. The paper pressing device of a printing press according to claim 1, wherein: A spring (10) is arranged between the lower support plate (11) and the upper pressing plate (9). The adjusting screw rod (7) passes through the center of the spring (10). One end of the adjusting screw rod (7) is provided with an internal hexagonal hole.

3. A paper pressing device for a printing machine according to claim 1, characterized in that: At least two bearings (2) are arranged, and the bearings (2) are arranged at equal intervals.

4. A paper pressing device for a printing machine according to claim 1, characterized in that: A pull rod (12) is fixed on the lower support plate (11). The other end of the pull rod (12) passes through to the outside of the upper pressing plate (9), and a plum blossom handle (8) is arranged at the other end of the pull rod (12).

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