Paper breaking device for rotary press

Abstract

The utility model discloses a paper breaking device for a rotary press, which relates to the field of rotary presses and comprises a side plate, the side surface of the side plate is rotatably connected with a plurality of winding rollers through a driving device, roll paper is wound on the surfaces of the winding rollers, a second sliding block is fixed on the side surface of a first tooth block, and the second sliding block is fixed at the end part of a connecting block. The second sliding block penetrates through and slides in the sliding groove, and the sliding groove is formed in the end, close to the side plate, of the fixing block. According to the paper breaking device for the rotary press, when a cutter cuts, the cutter can cut from the side face of roll paper firstly due to the shape characteristics of the cutter, then the roll paper is slowly tangent to the center and other positions of the roll paper, the cutting effect is improved, the roll paper can be in an S shape through the winding roller under extrusion of the external roller, the roll paper and the cutter can be better attached and tightened, and the cutting efficiency is improved. The cutting effect and efficiency of the cutter on the roll paper are improved, finally, the cutter can be directly pulled to be disassembled and replaced, and the use convenience of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of rotary printing press technology, specifically to a paper-cutting device for rotary printing presses. Background Technology

[0002] A rotary printing press is a device that uses a rotating printing cylinder to achieve fast, efficient, and high-volume printing. When the paper is faulty or needs to be processed, a paper cutting device is used to cut the roll of paper in the printing press. This can quickly and accurately cut the paper to prevent defective products from entering subsequent processes, thereby maintaining print quality and reducing waste.

[0003] The current paper-cutting device still has some shortcomings, such as the inability to quickly cut paper:

[0004] To overcome the problem of low paper-cutting efficiency, a Chinese patent (publication number: CN215153000U) discloses a paper-cutting device for a rotary printing press. The device has an embedded paper-cutting balancer on its body, a power control unit assembly located below the guide roller assembly, and a contact point located on a partial wall surface outside the guide roller, corresponding to one side of the partition wall. The paper-cutting knife is a structure in which, upon receiving a paper-cutting signal, the power control unit drives the shaft to rotate downwards, which in turn drives the knife head and the paper-cutting knife to rotate, changing the upward orientation to an outward orientation, thus completing the rapid paper-cutting process. This can cut the paper strip in time, effectively prevent it from winding onto the roller, quickly alleviate the situation of sudden increase in tension force, and effectively improve the production safety factor.

[0005] However, the paper cutting devices currently in use still have certain shortcomings. The paper tape is cut by rotating an electrically driven paper cutter as described above. The rotating cut is prone to producing a slanted surface. In addition, the paper may bend during the cutting process, which may affect the paper cutting effect. Therefore, the existing structure needs to be improved. Utility Model Content

[0006] The purpose of this invention is to provide a paper-cutting device for a rotary printing press, in order to solve the problems of low cutting efficiency and inconvenience in replacing blades in the paper-cutting devices mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a paper-cutting device for a rotary printing press, comprising a side plate, wherein multiple rolls are rotatably connected to the side of the side plate via a drive device, and rolls of paper are wound around the surface of the rolls.

[0008] A fixing block is fixedly connected to the side of the side plate near the roller. A guide groove is symmetrically opened at the bottom of the fixing block. A guide block slides through the guide groove. A connecting block is fixed at the bottom of the guide block. The connecting block moves inside the fixing block. A cutter is connected to the bottom of the connecting block. A cutting mechanism is provided inside the fixing block to improve the paper cutting efficiency of the printing press.

[0009] The top of the cutter is fixed with an insert block, and the top of the cutter is provided with a positioning mechanism for easy installation.

[0010] Furthermore, the cutting mechanism includes a first slider, which is fixed to the top of the connecting block away from the cutter, and slides through the first rotating groove, which is formed at the bottom of the fixed block.

[0011] Furthermore, a motor is installed inside the first rotating groove, a second rotating block is fixed to the output end of the motor, a first rotating block is rotatably connected to the side of the second rotating block, and a first slider is rotatably connected to the inside of the first rotating block.

[0012] Furthermore, a second rotating groove is provided through the side of the side plate near the fixed block. The second rotating groove is provided with a lifting mechanism to improve the cutting effect of the cutter. The lifting mechanism includes a first tooth block, which slides inside the second rotating groove near the fixed block. A gear is meshed with the side of the first tooth block, and a second tooth block is meshed with the side of the gear away from the first tooth block. Both the first tooth block and the second tooth block slide inside the second rotating groove.

[0013] Furthermore, a second slider is fixed to the side of the first tooth block. The second slider is fixed to the end of the connecting block and slides through the groove. The groove is opened at the end of the fixed block near the side plate.

[0014] Furthermore, an external block is fixed to the side of the second tooth block, and an external roller is rotatably connected to the side of the external block away from the second tooth block. The external roller is located below the paper roll.

[0015] Furthermore, the positioning mechanism includes positioning grooves symmetrically opened on both sides of the insert block, and a slot is provided at the bottom of the connecting block. The slot is slidably connected to the insert block, and spring pieces are symmetrically fixed inside the slot. The spring pieces are positioned in connection with the positioning grooves.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This paper-cutting device for a rotary printing press features a cutter that, due to its shape, can first cut the side of the roll of paper and then gradually cut towards the center, improving the cutting effect. The external roller's compression, through the roll roller, can shape the roll of paper into an S-shape, allowing the roll of paper to fit more closely and tautly with the cutter, thus improving the cutter's cutting effect and efficiency. Finally, the cutter can be disassembled and replaced by simply pulling it, improving the ease of use of the device.

[0018] 2. A guide block is provided to guide the movement of the connecting block and prevent the connecting block from shifting, which would affect the cutting effect of the cutter.

[0019] 3. It is equipped with a cutter with an angled blade, which allows the device to start cutting the roll of paper from the side first, thus improving the cutting efficiency.

[0020] 4. Equipped with gears, the rotation of the gears causes the outer roller to move upward, which, in conjunction with the winding roller, keeps the paper roll taut, further improving the cutting effect of the cutter;

[0021] 5. It is equipped with a spring clip, which allows the cutter to be disassembled and replaced by pulling through the material deformation of the spring clip, thus improving the efficiency of disassembly. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall rear-view three-dimensional structure of this utility model;

[0024] Figure 3 This is an enlarged three-dimensional structural diagram of the fixing block of this utility model;

[0025] Figure 4 This is an enlarged three-dimensional structural diagram of the guide block of this utility model;

[0026] Figure 5 This is an enlarged three-dimensional structural diagram of the first rotating block of this utility model;

[0027] Figure 6 This is an enlarged three-dimensional structural diagram of the gear of this utility model;

[0028] Figure 7 This is a cross-sectional, three-dimensional structural diagram of the connecting block of this utility model.

[0029] In the diagram: 1. Side plate; 2. Roller; 3. Paper roll; 101. Fixing block; 102. Guide groove; 103. Guide block; 104. Connecting block; 105. First slider; 106. First rotating groove; 107. First rotating block; 108. Second rotating block; 109. Cutter; 110. Second rotating groove; 111. First toothed block; 112. Gear; 113. Second toothed block; 114. Second slider; 115. Slide groove; 116. External connecting block; 117. External connecting roller; 118. Insert block; 119. Positioning groove; 120. Slot; 121. Spring. Detailed Implementation

[0030] 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.

[0031] Example 1, such as Figures 1-5 The present invention provides the following technical solution to address the problem of low cutting efficiency in paper-cutting devices: A cutting mechanism is disclosed:

[0032] The device includes a side plate 1, with multiple rollers 2 rotatably connected to the side of the side plate 1 via a drive device. Rolls 3 are wound around the surface of the rollers 2. A fixing block 101 is fixedly connected to the side of the side plate 1 near the rollers 2. Guide grooves 102 are symmetrically formed at the bottom of the fixing block 101. A guide block 103 slides through the guide grooves 102. A connecting block 104 is fixedly attached to the bottom of the guide block 103 and moves within the fixing block 101. A cutter 109 is connected to the bottom of the connecting block 104. A cutting mechanism to improve the paper-cutting efficiency of the printing press is installed inside the fixing block 101. The top of the cutter 109... The cutting mechanism includes a first slider 105, which is fixed to the top of the connecting block 104 away from the cutter 109. The first slider 105 slides through the first rotating groove 106, which is opened at the bottom of the fixed block 101. A motor is installed inside the first rotating groove 106. A second rotating block 108 is fixed to the output end of the motor. A first rotating block 107 is rotatably connected to the side of the second rotating block 108. The first slider 105 is rotatably connected to the inner side of the first rotating block 107.

[0033] When the printing press is in use, the drive unit can drive the winding roller 2 to rotate. When the winding roller 2 rotates, it can drive the paper roll 3 to wind. When the paper roll 3 is wound to a specified length, the motor is started. When the motor starts, the output end can drive the second rotating block 108 to rotate. When the second rotating block 108 rotates, it can drive the first rotating block 107 to rotate. When the first rotating block 107 rotates, it can drive the first slider 105 to move. At the same time, the first rotating block 107 can rotate through the first slider 105. When the first slider 105 moves, it can slide through the first rotating groove 106. When the first slider 105 slides, it can drive the connecting block 104 to move. When the connecting block 104 moves, it can drive the two guide blocks 103 to move. When the two guide blocks 103 move, they can both move. The cutting blade 109 slides down through the guide groove 102. When the connecting block 104 slides, it can drive the cutting blade 109 to move downward. When the cutting blade 109 moves downward, it can protrude from the bottom of the fixing block 101. When the cutting blade 109 protrudes, it can cut the roll paper 3 that is attached to the bottom of the fixing block 101. When the cutting blade 109 cuts, it can first cut from the side of the roll paper 3, and then slowly cut towards the center of the roll paper 3. Compared with direct overall cutting, it is more efficient. After the cutting blade 109 cuts the roll paper 3, the second rotating block 108 will rotate once and then reset. When the second rotating block 108 resets, it can drive the cutting blade 109 to reset, so that the cutting blade 109 can be retracted inside the fixing block 101, ensuring the safety of the cutting blade 109.

[0034] Example 2, as follows Figure 3 and Figure 6The present invention provides the following technical solution to address the problem that the paper bends during cutting, affecting the cutting effect, based on Embodiment 1: A lifting mechanism is disclosed: a second rotating groove 110 is provided through the side of the side plate 1 near the fixed block 101. A lifting mechanism to improve the cutting effect of the cutter 109 is provided inside the second rotating groove 110. The lifting mechanism includes a first toothed block 111, which slides inside the second rotating groove 110 near the fixed block 101. A gear 112 is meshed with the side of the first toothed block 111, and the gear 112 meshes with the side away from the first toothed block 111. A second toothed block 113 is connected to the first toothed block 111. Both the first toothed block 111 and the second toothed block 113 slide inside the second rotating groove 110. A second slider 114 is fixed to the side of the first toothed block 111. The second slider 114 is fixed to the end of the connecting block 104 and slides through the groove 115. The groove 115 is located at the end of the fixed block 101 near the side plate 1. An external connecting block 116 is fixed to the side of the second toothed block 113. An external connecting roller 117 is rotatably connected to the side of the external connecting block 116 away from the second toothed block 113. The external roller 117 is located below the roll of paper 3. When the cutter 109 of the printing press cuts the paper, the connecting block 104... 4. The connecting block 104 can slide down inside the fixed block 101. When the connecting block 104 slides down, it can drive the second slider 114 to move. When the second slider 114 moves, it can slide through the slide groove 115. When the second slider 114 moves, it can drive the first tooth block 111 to slide inside the second rotating groove 110. When the first tooth block 111 slides, it can drive the gear 112 to mesh and rotate. When the gear 112 meshes and rotates, it can rotate through the second rotating groove 110. When the gear 112 rotates, it can drive the second tooth block 113 to mesh and move. When the first tooth block 111 and the second tooth block 113 mesh and move, they can both pass through the second rotating groove 110. The sliding mechanism allows the first toothed block 111 and the second toothed block 113 to move in opposite directions via gear 112. When the cutter 109 cuts the roll paper 3, the cutter 109 needs to move downwards, while the second toothed block 113 moves upwards via the push of the second slider 114. When the second toothed block 113 moves upwards, it can drive the outer block 116 and the outer roller 117 to move upwards. When the outer roller 117 moves to the bottom of the roll paper 3, it can squeeze it. The squeezing of the outer roller 117 can make the roll paper 3 into an S-shape through the roll roller 2, which can make the roll paper 3 fit more closely and tautly with the cutter 109, thus improving the cutting effect and efficiency of the cutter 109 on the roll paper 3.

[0035] Example 3, as follows Figure 4 , Figure 6 and Figure 7The present invention provides the following technical solution to address the problem of inconvenient blade replacement in the paper cutting device: In accordance with the problem described in Embodiment 1, a positioning mechanism is disclosed. This positioning mechanism includes positioning grooves 119 symmetrically located on both sides of the insert block 118. A slot 120 is provided at the bottom of the connecting block 104, and the slot 120 is slidably connected to the insert block 118. Spring pieces 121 are symmetrically fixed inside the slot 120, and the spring pieces 121 are positioned in relation to the positioning grooves 119. When the printing press requires long-term use, the cutter 109 needs to be replaced. This requires first using a motor to... The cutter 109 is moved out of the connecting block 104. After the cutter 109 is moved out, it is pulled down by a tool. When the cutter 109 is pulled down, it can drive the insert block 118 to move. When the insert block 118 moves, it can slide through the slot 120. When the insert block 118 slides, it can drive the positioning groove 119 to press against the inner wall of the spring piece 121. When the spring piece 121 is pressed, it can deform through its own structure. When the spring piece 121 deforms, the insert block 118 can slide out of the inner side of the slot 120. At this time, the cutter 109 and the connecting block 104 are separated, which improves the efficiency of the cutter 109 replacement.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A paper-cutting device for a rotary printing press, comprising a side plate (1), wherein a plurality of rollers (2) are rotatably connected to the side of the side plate (1) via a drive device, and a roll of paper (3) is wound around the surface of the rollers (2), characterized in that: A fixing block (101) is fixedly connected to the side of the side plate (1) near the roller (2). The bottom of the fixing block (101) is symmetrically provided with guide grooves (102). A guide block (103) slides through the guide groove (102). A connecting block (104) is fixed to the bottom of the guide block (103). The connecting block (104) moves inside the fixing block (101). A cutter (109) is connected to the bottom of the connecting block (104). A cutting mechanism to improve the paper cutting efficiency of the printing press is provided inside the fixing block (101). The top of the cutter (109) is fixed with a plug (118), and the top of the cutter (109) is provided with a positioning mechanism for easy installation.

2. The paper-cutting device for a rotary printing press according to claim 1, characterized in that: The cutting mechanism includes a first slider (105), which is fixed to the top of the connecting block (104) away from the cutter (109). The first slider (105) slides through the inside of a first rotating groove (106), which is located at the bottom of the fixed block (101).

3. A paper-cutting device for a rotary printing press according to claim 2, characterized in that: A motor is installed inside the first rotating groove (106), and a second rotating block (108) is fixed at the output end of the motor. A first rotating block (107) is rotatably connected to the side of the second rotating block (108), and a first slider (105) is rotatably connected to the inside of the first rotating block (107).

4. A paper-cutting device for a rotary printing press according to claim 1, characterized in that: The side plate (1) has a second rotating groove (110) extending through the side of the fixed block (101). The second rotating groove (110) is provided with a lifting mechanism to improve the cutting effect of the cutter (109). The lifting mechanism includes a first tooth block (111). The first tooth block (111) slides inside the second rotating groove (110) near the fixed block (101). A gear (112) is meshed with the side of the first tooth block (111). A second tooth block (113) is meshed with the side of the gear (112) away from the first tooth block (111). Both the first tooth block (111) and the second tooth block (113) slide inside the second rotating groove (110).

5. A paper-cutting device for a rotary printing press according to claim 4, characterized in that: The first toothed block (111) has a second slider (114) fixed on its side. The second slider (114) is fixed to the end of the connecting block (104), and the second slider (114) slides through the inside of the slide groove (115). The slide groove (115) is opened at the end of the fixed block (101) near the side plate (1).

6. A paper-cutting device for a rotary printing press according to claim 4, characterized in that: An external block (116) is fixed to the side of the second tooth block (113). An external roller (117) is rotatably connected to the side of the external block (116) away from the second tooth block (113). The external roller (117) is located below the paper roll (3).

7. A paper-cutting device for a rotary printing press according to claim 1, characterized in that: The positioning mechanism includes a positioning groove (119) which is symmetrically opened on both sides of the insert block (118). The bottom of the connecting block (104) is provided with a slot (120). The slot (120) is slidably connected to the insert block (118). The slot (120) is symmetrically fixed with a spring piece (121) inside the slot (120). The spring piece (121) is positioned connected to the positioning groove (119).

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