Paper positioning mechanism of offset printing printer

Abstract

The utility model belongs to the field of offset printing printers, and particularly relates to a paper positioning mechanism of an offset printing printer, which comprises a fixed seat, the upper end of the fixed seat is fixedly connected with two symmetrically distributed mounting seats, mounting holes are arranged in the mounting seats, the inner side of the fixed seat is contacted with two symmetrically distributed press blocks, and the press blocks are arranged in the mounting holes. The upper ends of the pressing blocks are fixedly connected with pressing rods, and a connecting rod is jointly and fixedly connected between the two pressing rods. Through the effect of the clamping blocks, when the pull rods are pushed towards the inner side, horizontal movement of the magnetic attraction seats and the clamping blocks can be achieved, the clamping blocks can slide towards the outer side under the elastic effect of the compressed third springs, and paper can be positioned through clamping of the clamping blocks to the paper; the paper is clamped and positioned through the elastic effect of the second spring, and the problem that the paper is extruded and deformed due to too large clamping force can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of offset printing printer technology, specifically to a paper positioning mechanism for an offset printing printer. Background Technology

[0002] Offset printers are printing devices that operate on the principle of oil-water immiscibility. Through the coordinated operation of components such as the printing plate, rubber roller, and impression cylinder, they precisely transfer ink onto paper or other materials. Their structure includes paper feeding, printing, ink / water mixing, and paper delivery systems, and they are characterized by high print quality, high speed, wide applicability, and cost-effectiveness. During the use of offset printers, paper positioning is necessary.

[0003] Utility model patent CN221662075U discloses a clamping mechanism and an automatic paper feeding device for an offset printing machine. The device includes a clamping plate on the surface of a fixed plate, a sliding seat on the surface of the clamping plate, an adjusting groove on the surface of a support, a positioning groove, a through groove, and a limiting groove on the surface of the support, an arc-shaped groove on the surface of the adjusting groove, a screw in the arc-shaped groove, and an internal thread and a sliding groove on the surface of a cover plate, with a positioning block in the sliding groove. By pushing the screw, the clamping plate is moved inward, bringing it closer to the paper. Then, rotating the screw causes the clamping plate to move again, moving it to the side of the paper to clamp and limit its position, ensuring stability during transport to the offset printing machine and preventing skewing during transport, thereby improving the printing pass rate.

[0004] In existing technologies, it is inconvenient to control the clamping force when positioning paper. Excessive clamping force can easily cause the paper to be squeezed, curled, and deformed, which will affect the subsequent printing results. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to provide a paper positioning mechanism for an offset printer, which solves the problem that excessive clamping force can easily cause the paper to be squeezed, curled, and deformed.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a paper positioning mechanism for an offset printer, comprising a fixed base, two symmetrically distributed mounting seats fixedly connected to the upper end of the fixed base, mounting holes being provided inside the mounting seats, two symmetrically distributed pressure blocks contacting the inner side of the fixed base, pressure rods fixedly connected to the upper ends of the pressure blocks, a connecting rod fixedly connected between the two pressure rods, two symmetrically distributed pull rods slidingly sleeved inside the fixed base, handles fixedly connected to the outer sides of the pull rods, a pressing mechanism provided on the pressure rods, and a clamping mechanism provided on the fixed base.

[0007] Preferably, the clamping mechanism includes a connecting seat, with the connecting seat fixedly connected inside the fixed seat. A slider is slidably sleeved inside the connecting seat, the slider is fixedly connected to a pressure rod, the pressure rod is slidably connected to the connecting seat, a connecting rod is fixedly connected to the top of the slider, the connecting rod is slidably connected to the connecting seat, a first spring is provided on the outside of the connecting rod, and a ball bearing is movably sleeved inside the slider, the ball bearing being movably connected to the connecting seat. This clamping mechanism facilitates the clamping and positioning of the paper.

[0008] Preferably, one end of the first spring is fixedly connected to the slider, and the other end of the first spring is fixedly connected to the connecting seat. By designing the first spring, the force of the first spring can be applied to the slider.

[0009] Preferably, the connecting seat has a groove inside, and a ball bearing is movably fitted inside the groove. By designing the groove, the ball bearing can roll inside the groove.

[0010] Preferably, the clamping mechanism includes a magnetic base, with the magnetic base slidably sleeved inside the fixed base, and a clamping block slidably sleeved inside the magnetic base. A guide rod is fixedly connected to the outside of the clamping block, and the guide rod is slidably connected to the magnetic base. A second spring is provided on the outside of the guide rod. A connecting block is fixedly connected to the top of the magnetic base, and the connecting block is slidably connected to the fixed base. A third spring is provided inside the fixed base. A magnet is attracted to the outside of the magnetic base, and the magnet is fixedly connected to the fixed base. By designing this clamping mechanism, paper can be clamped and positioned.

[0011] Preferably, one end of the second spring is fixedly connected to the clamping block, and the other end of the second spring is fixedly connected to the magnetic base. By designing the second spring, the force of the second spring can be applied to the clamping block.

[0012] Preferably, one end of the third spring is fixedly connected to the connecting block, and the other end of the third spring is fixedly connected to the fixing seat. By designing the third spring, the force of the third spring can be applied to the connecting block.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model utilizes a clamping block design. When the pull rod is pushed inward, the magnetic base and clamping block can move horizontally. The clamping block can slide outward under the elastic action of the compressed third spring. By clamping the paper with the clamping block, the paper can be positioned. During clamping and positioning, the elastic action of the second spring effectively avoids the problem of excessive clamping force causing the paper to be squeezed and deformed. 2. This utility model utilizes a pressure block design. Pulling the connecting rod upward moves the pressure block upward, allowing the paper to be placed inside the fixed base. Lowering the connecting rod causes the pressure block to press down on the paper under the elastic action of the first spring. This assists in positioning the paper, improving the positioning effect, and also flattens the paper, preventing horizontal compression and deformation to some extent. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 A partial three-dimensional sectional view of the structure;

[0017] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0018] Figure 4 This utility model Figure 2 A front sectional view of a partial structure of the fixing seat.

[0019] In the diagram: 1. Fixed base; 2. Mounting base; 3. Mounting hole; 4. Pressure block; 5. Pressure rod; 6. Connecting rod; 7. Pull rod; 8. Clamping mechanism; 9. Clamping mechanism; 10. Handle; 81. Connecting base; 82. Slider; 83. Connecting rod; 84. First spring; 85. Ball bearing; 86. Groove; 91. Magnetic base; 92. Clamping block; 93. Guide rod; 94. Second spring; 95. Connecting block; 96. Third spring; 97. Magnet. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 , Figure 2A paper positioning mechanism for an offset printer includes a fixed base 1. Two symmetrically distributed mounting seats 2 are fixedly connected to the upper end of the fixed base 1. The mounting seats 2 have mounting holes 3 inside. Two symmetrically distributed pressure blocks 4 are in contact with the inner side of the fixed base 1. Pressure rods 5 are fixedly connected to the upper end of the pressure blocks 4. A connecting rod 6 is fixedly connected between the two pressure rods 5. Two symmetrically distributed pull rods 7 are slidably sleeved inside the fixed base 1. A handle 10 is fixedly connected to the outer side of the pull rods 7. A pressing mechanism 8 is provided on the pressure rods 5. A clamping mechanism 9 is provided on the fixed base 1.

[0022] Please see Figure 1 , Figure 2 , Figure 3 The pressing mechanism 8 includes a connecting seat 81. The connecting seat 81 is fixedly connected inside the fixed seat 1. A slider 82 is slidably sleeved inside the connecting seat 81. The slider 82 is fixedly connected to the pressure rod 5. The pressure rod 5 is slidably connected to the connecting seat 81. A connecting rod 83 is fixedly connected to the top of the slider 82. The connecting rod 83 is slidably connected to the connecting seat 81. A first spring 84 is provided on the outside of the connecting rod 83. One end of the first spring 84 is fixedly connected to the slider 82. The other end of the first spring 84 is fixedly connected to the connecting seat 81. By designing the first spring 84, the force of the first spring 84 can act on the slider 82. A ball bearing 85 is movably sleeved inside the slider 82. The ball bearing 85 is movably connected to the connecting seat 81. A groove 86 is opened inside the connecting seat 81. The ball bearing 85 is movably sleeved inside the groove 86. By designing the groove 86, the ball bearing 85 can roll inside the groove 86. By designing the pressing mechanism 8, it is convenient to press and position the paper.

[0023] Please see Figure 1 , Figure 2 , Figure 4 The clamping mechanism 9 includes a magnetic base 91, which is slidably sleeved inside the fixed base 1. A clamping block 92 is slidably sleeved inside the magnetic base 91. A guide rod 93 is fixedly connected to the outside of the clamping block 92, and the guide rod 93 is slidably connected to the magnetic base 91. A second spring 94 is provided on the outside of the guide rod 93. One end of the second spring 94 is fixedly connected to the clamping block 92, and the other end is fixedly connected to the magnetic base 91. By designing the second spring 94, the force of the second spring 94 can act on the clamping block 92. A connecting block 95 is fixedly connected to the top of the suction base 91. The connecting block 95 is slidably connected to the fixed base 1. A third spring 96 is provided inside the fixed base 1. One end of the third spring 96 is fixedly connected to the connecting block 95, and the other end of the third spring 96 is fixedly connected to the fixed base 1. By designing the third spring 96, the force of the third spring 96 can be applied to the connecting block 95. A magnet 97 is attracted to the outside of the magnetic suction base 91. The magnet 97 is fixedly connected to the fixed base 1. By designing the clamping mechanism 9, the paper can be clamped and positioned.

[0024] The specific implementation process of this utility model is as follows: In use, first pull the connecting rod 83 upward, the connecting rod 83 drives the slider 82 to move upward, the slider 82 drives the ball 85 to roll along the groove 86, the slider 82 squeezes the first spring 84, at the same time the slider 82 drives the pressure rod 5 to move upward, the pressure rod 5 drives the connecting rod 6 and the pressure block 4 to move upward, so that the pressure block 4 separates from the fixed seat 1. Then place the paper under the pressure block 4, and then put the connecting rod 83 down, so that the pressure block 4 contacts the paper. At this time, the first spring 84 is still in a compressed state, which will give the slider 82 a downward pressure, so that the pressure block 4 can press down the paper to position the paper.

[0025] After the positioning is completed, push the handle 10 inward. The handle 10 drives the pull rod 7 to slide inward, and the pull rod 7 drives the magnetic seat 91 to move, so that the magnetic seat 91 separates from the magnet 97. At this time, since the third spring 96 inside the fixed seat 1 is in a compressed state, the third spring 96 will be pushed outward by the connecting block 95. The connecting block 95 will drive the magnetic seat 91 to slide outward, so that the clamping block 92 contacts the paper and stops moving, while the magnetic seat 91 maintains a certain distance of movement. The magnetic seat 91 and the clamping block 92 slide relative to each other. The magnetic seat 91 will squeeze the second spring 94. Under the elastic action of the second spring 94, it will push the clamping block 92 outward, which can make the clamping block 92 clamp the paper. When clamping and positioning, the paper is clamped and positioned by the elastic action of the second spring 94, which can effectively avoid the problem of the paper being squeezed and deformed due to excessive clamping force. With the downward pressure of the pressure block 4, the paper can be assisted in positioning and the positioning effect can be improved. It can also flatten the paper and prevent the paper from being squeezed and deformed in the horizontal direction to a certain extent.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A paper positioning mechanism for an offset printer, comprising a fixing base (1), characterized in that: The upper end of the fixed base (1) is fixedly connected to two symmetrically distributed mounting bases (2). The mounting base (2) has a mounting hole (3) inside. The inner side of the fixed base (1) contacts two symmetrically distributed pressure blocks (4). The upper end of the pressure block (4) is fixedly connected to a pressure rod (5). The two pressure rods (5) are fixedly connected to a connecting rod (6). The inside of the fixed base (1) is slidably fitted with two symmetrically distributed pull rods (7). The outer side of the pull rod (7) is fixedly connected to a handle (10). The pressure rod (5) is provided with a pressing mechanism (8). The fixed base (1) is provided with a clamping mechanism (9).

2. The paper positioning mechanism of an offset printer according to claim 1, characterized in that: The pressing mechanism (8) includes a connecting seat (81). The connecting seat (81) is fixedly connected inside the fixed seat (1). A slider (82) is slidably sleeved inside the connecting seat (81). The slider (82) is fixedly connected to the pressure rod (5). The pressure rod (5) is slidably connected to the connecting seat (81). A connecting rod (83) is fixedly connected to the top of the slider (82). The connecting rod (83) is slidably connected to the connecting seat (81). A first spring (84) is provided on the outside of the connecting rod (83). A ball (85) is movably sleeved inside the slider (82). The ball (85) is movably connected to the connecting seat (81).

3. The paper positioning mechanism of an offset printer according to claim 2, characterized in that: One end of the first spring (84) is fixedly connected to the slider (82), and the other end of the first spring (84) is fixedly connected to the connecting seat (81).

4. The paper positioning mechanism of an offset printer according to claim 2, characterized in that: The connecting seat (81) has a groove (86) inside, and a ball (85) is movably sleeved inside the groove (86).

5. The paper positioning mechanism of an offset printer according to claim 1, characterized in that: The clamping mechanism (9) includes a magnetic base (91), which is slidably sleeved inside the fixed base (1). A clamping block (92) is slidably sleeved inside the magnetic base (91). A guide rod (93) is fixedly connected to the outside of the clamping block (92). The guide rod (93) is slidably connected to the magnetic base (91). A second spring (94) is provided on the outside of the guide rod (93). A connecting block (95) is fixedly connected to the top of the magnetic base (91). The connecting block (95) is slidably connected to the fixed base (1). A third spring (96) is provided inside the fixed base (1). A magnet (97) is attracted to the outside of the magnetic base (91). The magnet (97) is fixedly connected to the fixed base (1).

6. The paper positioning mechanism of an offset printer according to claim 5, characterized in that: One end of the second spring (94) is fixedly connected to the clamp (92), and the other end of the second spring (94) is fixedly connected to the magnetic base (91).

7. The paper positioning mechanism of an offset printer according to claim 5, characterized in that: One end of the third spring (96) is fixedly connected to the connecting block (95), and the other end of the third spring (96) is fixedly connected to the fixed seat (1).

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