Lithographic printing machine
By designing limit components and guide rollers in the lithographic printing press, the problem of paper replacement and disassembly and assembly of paper rolls is solved, and smooth paper picking and cutting is achieved, improving the convenience and efficiency of the printing press.
Patent Information
- Application Number
- CN202421665811.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing paper roll rollers of the lithographic printing press are troublesome to operate when changing paper and disassembly and are inconvenient to cut when picking up paper.
A lithographic printing machine including guide rails, mobile printing presses, rotary shafts, limit seats, paper rolls and servo motors are designed. The limiting seat is limited to the roll roller through the limiting assembly, which simplifies the paper change and disassembly process, and achieves smooth paper pickup and cutting through guide rollers and cutting knives.
It improves the convenience of the liquid printing press during use, simplifies the disassembly and assembly and replacement of paper roll rollers, avoids damage to paper when picking up paper, and facilitates cutting.
Smart Images
Figure CN222819724U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of flat printing, and in particular relates to a flat printing machine. Background Art
[0002] There are three types of machines that use lithography for printing: lithography, offset printing, and collotype. Offset printing is the main type. The ink attached to the image of the offset printing plate is first transferred to the rubber surface of the rubber cylinder, and then transferred to the surface of the substrate through embossing. This is called indirect printing. Early lithography and collotype printing are direct printing without transferring images through the rubber. The lithography machine is different from other printing methods in that it is equipped with a dampening device. Except for lithography, collotype, and proofing machines, all other printing machines are round-to-round printing machines.
[0003] The commonly used flatbed printing machines are all provided with a paper roll box at the end to store the paper roll and the paper roll, so that it is convenient to take out the paper roll for cutting and printing during printing. However, the existing paper roll structure is relatively fixed and is generally installed inside the paper roll box with screws. When the paper roll on the paper roll is used up, it needs to be disassembled and replaced, which is a troublesome and inconvenient process. In addition, it is also inconvenient to disassemble and repair the paper roll when a paper jam occurs. At the same time, it is inconvenient to cut the paper when taking out the paper for printing.
[0004] Therefore, a lithographic printing press is needed to solve the problem that the paper roll inside the lithographic printing press is troublesome to operate when replacing and disassembling the paper and is inconvenient to cut the paper when taking it out. Utility Model Content
[0005] The purpose of the utility model is to provide a planographic printing machine to solve the problems raised in the above background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A lithographic printing machine comprises a printing table, two symmetrically arranged guide rails are fixed on the top of the printing table, a mobile printing machine is slidably connected between the two guide rails, a placement groove is opened on the top of the printing table, and the inner walls on both sides of the placement groove are rotatably connected with symmetrically arranged rotating shafts, one end of the rotating shaft is fixed with a limiting seat, a paper winding roller is connected between the two limiting seats, and limiting components are respectively arranged between the two ends of the paper winding roller and the two limiting seats, and a servo motor is fixed to the outer wall of one side of the printing table, and the servo motor is coaxially connected to one of the rotating shafts.
[0008] Preferably, the limit assembly includes two limit blocks respectively fixed at two ends of the paper winding roller, the top of the limit seat is provided with a limit groove, the limit groove and the limit block are plugged into each other, the inner walls of the two sides of the limit groove are respectively provided with symmetrical grooves, the inner side wall of the groove is slidably connected with a clamping block, one side side wall of the groove is slidably penetrated by a connecting rod, one end of the connecting rod is fixed with the limit block, the other end of the connecting rod is fixed with a connecting block, the outer wall of the connecting rod is sleeved with a limit spring, the two ends of the limit spring are respectively fixed to one side outer wall of the limit seat and the connecting block, the bottom end of the limit groove is slidably penetrated by a lifting rod, the top of the lifting rod is fixed with a supporting block, the bottom end of the lifting rod is fixed to the pulling block, the outer wall of the lifting rod is sleeved with a supporting spring, the two ends of the supporting spring are respectively fixed to the bottom end of the support block and the bottom side wall of the limit groove, and a connecting rope is fixed between the two connecting blocks and the clamping block.
[0009] Preferably, the top end of the block is arranged in an inclined surface, the bottom end of the block is arranged in a flat surface, and the size of the groove is adapted to the size of the limit block.
[0010] Preferably, two symmetrically arranged square grooves are provided at the bottom end of the limit seat, guide wheels are rotatably connected between the side walls of the square grooves, the connecting ropes pass through the corresponding guide wheels respectively, and the connecting ropes are slidably connected to the corresponding guide wheels.
[0011] Preferably, a fixed plate is fixed between the two guide rails, a sliding rod is slidably passed through the top end of the fixed plate, a cutting knife is fixed to the bottom end of the sliding rod, a pressure plate is fixed to the top end of the sliding rod, a movable plate is slidably sleeved on the outer side wall of the sliding rod, a telescopic spring is sleeved on the outer side wall of the sliding rod, and both ends of the telescopic spring are respectively fixed to the pressure plate and the movable plate.
[0012] Preferably, guide rollers are rotatably connected between inner walls on both sides of the placement groove, one end of the two guide rails are rotatably connected to a rotating block, and a protective cover is commonly fixed between the two rotating blocks.
[0013] Compared with the prior art, the lithographic printing machine provided by the utility model has the following beneficial effects:
[0014] (1) The limiting seat and the paper roll are connected by a limiting assembly, so that the paper roll can be easily disassembled and maintained when the printing machine is changing paper or overhauling, thereby improving the convenience of the flatbed printing machine in use. The paper is guided out by a guide roller, which can avoid the paper being damaged by a large friction or pulling force when taking the paper, making the paper taking smoother and having a certain protective effect. The paper is cut by a cutting knife, which is convenient for the flatbed printing machine to take the paper and print.
[0015] (2) By opening the protective cover and pulling the pull block, the two clamping blocks can be driven to retract synchronously, thereby releasing the limiting state of the limit block and removing the paper roll. By placing the limit blocks at both ends of the paper roll into the two limit seats and pressing them, the limit blocks and the clamping blocks can automatically complete the limiting, which greatly improves the convenience of disassembling and assembling the paper roll when replacing the paper roll. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the internal structure of the placement tank of the utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the cutting knife of the utility model;
[0019] Figure 4 The schematic diagram of the limit seat structure of the utility model is as follows
[0020] Figure 5 It is a schematic diagram of the disassembled limit seat structure of the utility model.
[0021] In the figure:
[0022] 1. Printing table; 2. Guide rail; 3. Mobile printing press; 4. Placement slot; 5. Rotating shaft; 6. Limit seat; 7. Paper roll; 8. Limit assembly; 9. Servo motor; 91. Limit block; 92. Limit slot; 93. Groove; 94. Block; 95. Connecting rod; 96. Connecting block; 97. Limit spring; 98. Lifting rod; 99. Support block; 910. Pull block; 911. Support spring; 912. Connecting rope; 10. Square slot; 11. Guide wheel; 12. Fixed plate; 13. Slide rod; 14. Cutting knife; 15. Movable disk; 16. Pressure plate; 17. Telescopic spring; 18. Guide roller; 19. Rotating block; 20. Protective cover. DETAILED DESCRIPTION
[0023] The present invention will be further described below in conjunction with the embodiments.
[0024] See also Figure 1-5The utility model provides a planographic printing machine, including a printing table 1, two symmetrically arranged guide rails 2 are fixed on the top of the printing table 1, a mobile printing machine 3 is slidably connected between the two guide rails 2, a placement groove 4 is opened on the top of the printing table 1, and the inner walls on both sides of the placement groove 4 are rotatably connected with symmetrically arranged rotating shafts 5, one end of the rotating shaft 5 is fixed with a limiting seat 6, a paper roll 7 is connected between the two limiting seats 6, and limiting components 8 are respectively arranged between the two ends of the paper roll 7 and the two limiting seats 6. A servo motor 9 is fixed to the outer wall of one side of the printing table 1, and the servo motor 9 is coaxially connected with one of the rotating shafts 5; the limiting seat 6 and the paper roll 7 are limitedly connected by the limiting component 8, so that the printing machine can be easily disassembled and maintained when changing paper or repairing the paper roll 7, thereby improving the convenience of the planographic printing machine when in use.
[0025] It is further worth explaining in detail that the limit assembly 8 includes two limit blocks 91 respectively fixed at the two ends of the paper roll 7, a limit groove 92 is provided at the top of the limit seat 6, the limit groove 92 and the limit block 91 are plugged into each other, and the inner walls on both sides of the limit groove 92 are respectively provided with symmetrically arranged grooves 93, the inner side wall of the groove 93 is slidably connected with a card block 94, and a connecting rod 95 is slidably penetrated through the side wall of one side of the groove 93, one end of the connecting rod 95 is fixed to the limit block 91, and the other end of the connecting rod 95 is fixed with a connecting block 96, and the outer side wall of the connecting rod 95 is sleeved with a limit spring 97, and the two ends of the limit spring 97 are respectively fixed to the outer wall of one side of the limit seat 6 and the connecting block 96, and the bottom end of the limit groove 92 is slidably penetrated by a lifting rod 98, and the lifting rod 9 A support block 99 is fixed to the top of 8, and the bottom end of the lifting rod 98 is fixed to the pulling block 910. The outer wall of the lifting rod 98 is sleeved with a supporting spring 911. The two ends of the supporting spring 911 are respectively fixed to the bottom end of the supporting block 99 and the bottom end side wall of the limiting groove 92, and a connecting rope 912 is fixed between the two connecting blocks 96 and the clamping block 94; by opening the protective cover 20 and pulling the pulling block 910, the two clamping blocks 94 can be driven to shrink synchronously, and then the limiting state of the limiting block 91 can be released to disassemble the paper roll 7. By placing the limiting blocks 91 at both ends of the paper roll 7 into the two limiting seats 6 and pressing them, the limiting blocks 91 and the clamping blocks 94 can automatically complete the limiting, which greatly improves the convenience of disassembling and assembling the paper roll 7 when replacing the paper roll.
[0026] It is further worthwhile to explain in detail that the top of the block 94 is arranged in an inclined surface, the bottom of the block 94 is arranged in a flat surface, and the size of the groove 93 is adapted to the size of the limit block 91;
[0027] This scheme has the following working process: during the use of the flatbed printing machine, the servo motor 9 drives the rotating shaft 5 and the limit seat 6 to rotate, and the limit seat 6 drives the paper roll 7 to rotate when rotating, and then the paper is taken out. After the paper is taken out and laid flat on the printing table 1, the pressure plate 16 is pressed to make the cutting knife 14 contact the paper, and the pressure plate 16 is pushed to drive the cutting knife 14 to move, and then the paper is cut. After cutting, the pressure plate 16 is released and the cutting knife 14 is driven to rise and reset through the telescopic spring 17. Finally, the mobile printing machine 3 can be used to print the paper on the top of the printing table 1. When the paper roll 7 needs to be replaced, the protective cover 20 is rotated to open, and the pull block 910 at the bottom of the limit seat 6 is pulled to drive the support block 99 to descend. At the same time, the pull block 910 pulls the connecting rope 912 to drive the slide bar 13 and the card When the block 94 moves, and the block 94 shrinks to the inside of the groove 93, the limit of the limit block 91 is released, and the paper roll 7 between the two limit seats 6 can be directly taken out. After replacing the paper roll, the paper roll 7 is placed between the two limit seats 6, and the limit blocks 91 at both ends of the paper roll 7 are plugged into the corresponding limit grooves 92, and the paper roll 7 is pressed. The limit block 91 squeezes the inclined surface at the top of the block 94, so that the block 94 automatically shrinks, and then the limit block 91 falls into the limit groove 92. After the limit block 91 enters the limit groove 92, the block 94 pops up and resets through the limit spring 97. At the same time, the support block 99 pushes the limit block 91 upward through the elastic force of the support spring 911, so that the limit block 91 and the bottom of the block 94 form a limit fixation, and the disassembly and replacement of the paper roll 7 is completed, which is relatively convenient.
[0028] According to the above working process, it can be known that by opening the protective cover 20 and pulling the pull block 910, the two clamping blocks 94 can be driven to shrink synchronously, and then the limiting state of the limit block 91 can be released to disassemble the paper roll 7. By placing the limit blocks 91 at both ends of the paper roll 7 into the two limit seats 6 and pressing them, the limit blocks 91 and the clamping blocks 94 can automatically complete the limiting, which greatly improves the convenience of disassembling and assembling the paper roll 7 when replacing the paper roll.
[0029] It is further worth explaining in detail that two symmetrically arranged square grooves 10 are opened at the bottom end of the limit seat 6, and guide wheels 11 are rotatably connected between the side walls of the square grooves 10. The connecting ropes 912 pass through the corresponding guide wheels 11 respectively, and the connecting ropes 912 are slidably connected to the corresponding guide wheels 11.
[0030] It is further worth explaining in detail that a fixed plate 12 is fixed between the two guide rails 2, a slide rod 13 is slidably penetrated through the top of the fixed plate 12, a cutting knife 14 is fixed to the bottom end of the slide rod 13, a pressure plate 16 is fixed to the top of the slide rod 13, a movable plate 15 is slidably sleeved on the outer wall of the slide rod 13, a telescopic spring 17 is sleeved on the outer wall of the slide rod 13, and both ends of the telescopic spring 17 are respectively fixed to the pressure plate 16 and the movable plate 15. By setting the cutting knife 14 to cut the paper, the flatbed printing machine can take paper and print.
[0031] It is further worth explaining in detail that guide rollers 18 are rotatably connected between the inner walls of both sides of the placement slot 4, and one end of the two guide rails 2 is rotatably connected to a rotating block 19, and a protective cover 20 is fixed between the two rotating blocks 19. The paper is guided out by the guide rollers 18, which can avoid the paper being damaged by large friction or pulling force when taking the paper, making the paper taking smoother and having a certain protective effect. The protective cover 20 can protect the paper winding roller 7 in the placement slot 4 to prevent the paper from being contaminated.
[0032] In summary: the limiting seat 6 and the paper roll 7 are limitedly connected by the limiting component 8, so that the paper roll 7 can be easily disassembled and maintained when the printing machine is changing paper or overhauling, thereby improving the convenience of the flatbed printing machine during use. The paper is guided out by the guide roller 18, which can avoid the paper being damaged by large friction or pulling force when taking the paper, making the paper taking smoother and having a certain protective effect. The cutting knife 14 is provided to cut the paper, which is convenient for the flatbed printing machine to take the paper and print.
[0033] The servo motor 9 can be purchased on the market. The servo motor 9 is equipped with a power supply, which is a mature technology in this field and has been fully disclosed, so it is not repeated in the specification.
Claims
1. A lithographic printing machine, comprising a printing table (1), characterized in that: Two symmetrically arranged guide rails (2) are fixed on the top of the printing table (1), a mobile printing machine (3) is slidably connected between the two guide rails (2), a placement groove (4) is provided on the top of the printing table (1), both inner walls of the placement groove (4) are rotatably connected with symmetrically arranged rotating shafts (5), one end of the rotating shaft (5) is fixed with a limiting seat (6), a paper winding roller (7) is connected between the two limiting seats (6), and limiting components (8) are respectively arranged between the two ends of the paper winding roller (7) and the two limiting seats (6), and a servo motor (9) is fixed on the outer wall of one side of the printing table (1), and the servo motor (9) is coaxially connected to one of the rotating shafts (5).
2. A lithographic printing press according to claim 1, characterized in that: The limiting assembly (8) comprises two limiting blocks (91) respectively fixed at two ends of the paper winding roller (7); a limiting groove (92) is provided at the top of the limiting seat (6); the limiting groove (92) and the limiting block (91) are plugged into each other; symmetrical grooves (93) are respectively provided on the inner walls of both sides of the limiting groove (92); a block (94) is slidably connected to the inner wall of the groove (93); a connecting rod (95) is slidably penetrated through one side wall of the groove (93); one end of the connecting rod (95) is fixed to the limiting block (91); the other end of the connecting rod (95) is fixed to a connecting block (96); the outer wall of the connecting rod (95) is sleeved with a A limit spring (97), the two ends of the limit spring (97) are respectively fixed to the outer wall of one side of the limit seat (6) and the connecting block (96), a lifting rod (98) is slidably passed through the bottom end of the limit slot (92), a support block (99) is fixed to the top end of the lifting rod (98), the bottom end of the lifting rod (98) is fixed to the pulling block (910), the outer side wall of the lifting rod (98) is sleeved with a support spring (911), the two ends of the support spring (911) are respectively fixed to the bottom end of the support block (99) and the bottom side wall of the limit slot (92), and a connecting rope (912) is fixed between the two connecting blocks (96) and the clamping block (94).
3. A lithographic printing press according to claim 2, characterized in that: The top end of the clamping block (94) is arranged in an inclined surface, the bottom end of the clamping block (94) is arranged in a flat surface, and the size of the groove (93) is adapted to the size of the limiting block (91).
4. A lithographic printing press according to claim 3, characterized in that: The bottom end of the limit seat (6) is provided with two symmetrically arranged square grooves (10), and guide wheels (11) are rotatably connected between the side walls of the square grooves (10), and the connecting ropes (912) pass through the corresponding guide wheels (11) respectively, and the connecting ropes (912) are slidably connected to the corresponding guide wheels (11).
5. A lithographic printing press according to claim 4, characterized in that: A fixed plate (12) is fixed between the two guide rails (2), a slide rod (13) is slidably passed through the top end of the fixed plate (12), a cutting knife (14) is fixed to the bottom end of the slide rod (13), a pressure plate (16) is fixed to the top end of the slide rod (13), a movable plate (15) is slidably sleeved on the outer wall of the slide rod (13), a telescopic spring (17) is sleeved on the outer wall of the slide rod (13), and two ends of the telescopic spring (17) are respectively fixed to the pressure plate (16) and the movable plate (15).
6. A planographic printing press according to claim 5, characterized in that: A guide roller (18) is rotatably connected between the inner walls of both sides of the placement groove (4), one end of each of the two guide rails (2) is rotatably connected to a rotating block (19), and a protective cover (20) is fixed between the two rotating blocks (19).