Paper roll switching device of printing machine
By adopting a cutting structure and an adhesive structure in the paper roll switching device of the printing press, the blade wear problem caused by flying knife cutting is solved, and efficient cutting and fast paper roll switching is achieved.
Patent Information
- Application Number
- CN202422456448.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-11
AI Technical Summary
When changing paper rolls in existing printing machines, the flying knife cuts the paper tape, resulting in low utilization rate of the blade and severe wear, and needs to be replaced frequently, which affects the cutting effect and efficiency.
The cutting structure and bonding structure are adopted, and the paper tape is cut using the shear force formed by the cutting knife and the cutting notch. The paper tape head and tail are bonded on both sides through the bonding structure to achieve synchronous cutting and firm connection.
It improves the utilization rate of the cutting knife, reduces the wear frequency, enhances the cutting effect, and fast switching speed of paper rolls and firm connection.
Smart Images
Figure CN223147213U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of loading roll switching, in particular to a paper roll switching device for a printing machine. Background Technique
[0002] Generally, a printing machine uses a paper roll for feeding. When a roll of paper is finished unwinding, in order to avoid having to re-thread the paper tape through the printing machine, the tail of the old paper roll is connected to the head of the new paper roll. To maintain the paper tape tension and facilitate cutting and connection, the machine stops when there is a small amount of paper tape remaining on the old paper roll, and enters the roll-changing process.
[0003] Generally, when changing the roll, the paper tape is cut by a flying knife. The flying knife cuts the paper by sliding the moving knife tip on the paper tape. The contact area between the cutting edge and the paper tape is small, the utilization rate of the cutting edge is low, the contact point between the cutting edge and the paper tape is prone to wear, the effect of cutting the paper tape is poor after the cutting edge is worn, and the knife head needs to be frequently replaced.
[0004] Based on this, a paper roll switching device for a printing machine is now provided, which can eliminate the drawbacks of existing devices. Content of the Utility Model
[0005] The purpose of the utility model is to provide a paper roll switching device for a printing machine to solve the problems in the background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solutions:
[0007] A paper roll switching device for a printing machine includes a support frame arranged on the ground. On the ground on the left and right sides of the support frame, a first unwinding mechanism and a second unwinding mechanism are symmetrically arranged. A printing mechanism is arranged at the upper end of the support frame. The support frame includes a first support frame and a second support frame which are arranged on the ground and connected to each other. A guide roller group for guiding the paper tape is arranged on the support frame. A traction structure for pulling the head of the paper roll is arranged on the support frame. A pair of sliding boxes are symmetrically and slidably arranged on the support frame. A lifting structure for driving the sliding boxes to lift is arranged on the support frame. A cutting structure for cutting the paper tape is arranged on the sliding boxes. A bonding structure for bonding the head and the tail is arranged on the sliding boxes.
[0008] Based on the above technical solutions, the utility model also provides the following optional technical solutions:
[0009] In an optional solution: The guide roller group includes a pair of first guide rollers, a pair of second guide rollers, and a pair of third guide rollers that are symmetrically and rotatably arranged on the support frame.
[0010] In an alternative solution: The traction structure includes guide rails symmetrically arranged on the support frame. The guide rails are integrally L-shaped, and the cross-section of the guide rails is T-shaped. A moving frame is slidably arranged on the guide rails. Two quick-release screws are threadedly connected to the moving frame, and a pressing plate is penetrated through the two quick-release screws. A limiting component is arranged on the support frame to prevent the moving frame from automatically falling along the guide rails.
[0011] In an alternative solution: The limiting component includes a fixed seat arranged on the support frame. A limiting pin is penetrated through the fixed seat, and there is a sliding damping between the fixed seat and the limiting pin.
[0012] In an alternative solution: Three guide wheels are rotatably arranged on the moving frame, and the guide wheels are in rolling contact with the guide rails.
[0013] In an alternative solution: A fourth guiding roller is rotatably arranged on the side of the pressing plate away from the moving frame.
[0014] In an alternative solution: The lifting structure includes support plates symmetrically arranged at the lower end of the support frame. A first telescopic cylinder is arranged on the support plates, and the output end of the first telescopic cylinder is connected to the lower surface of the sliding box.
[0015] In an alternative solution: The lower end of the sliding box is a bottom plate, the upper end of the sliding box is a top plate, and a partition is arranged between the bottom plate and the top plate of the sliding box. The cutting structure includes a cutting box slidably arranged between the partition and the top plate. A third telescopic cylinder for driving the cutting box to slide on the sliding box is arranged on the sliding box. The output end of the third telescopic cylinder is connected to the cutting box. A cutting cavity is arranged in the cutting box. A cutting opening is arranged on the side of the cutting cavity away from the third telescopic cylinder. A negative pressure cavity is arranged below the cutting opening on the cutting box. A second ventilation hole is densely arranged on the side of the negative pressure cavity away from the third telescopic cylinder. A cutting knife matching the cutting opening is slidably arranged in the cutting opening on the second support frame. A fourth telescopic cylinder for driving the cutting knife to slide in the cutting opening is arranged in the cutting cavity on the second support frame. The output end of the fourth telescopic cylinder is connected to the cutting knife.
[0016] In an alternative solution: The bonding structure includes a negative pressure box slidably arranged between the bottom plate and the partition. A second telescopic cylinder for driving the negative pressure box to slide on the sliding box is arranged on the sliding box. A C-shaped connecting block is arranged at the output end of the second telescopic cylinder. A T-shaped connecting block matching the C-shaped connecting block is arranged on the negative pressure box. The T-shaped connecting block is slidably connected to the C-shaped connecting block. A first ventilation hole is densely arranged on the side of the negative pressure box away from the second telescopic cylinder. An L-shaped sliding groove is arranged on the bottom plate. A guiding block matching the L-shaped sliding groove is arranged on the lower surface of the negative pressure box. The guiding block is slidably arranged in the L-shaped sliding groove.
[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0018] The utility model cuts the paper tape by the cooperation of a cutting knife and a cutting port, and relies on the shearing force formed between the cutting knife and the cutting port to cut the paper tape. The utilization rate of the cutting edge is high, the cutting knife is not easily worn, the cutting effect is good, and the replacement frequency of the cutting knife is low.
[0019] The utility model synchronously cuts two paper tapes through a cutting structure, and double-sided bonds the tape tail of the first paper tape and the tape head of the second paper tape through an adhesive structure, with firm connection and fast paper roll switching speed. Description of the Drawings
[0020] Figure 1 It is a schematic structural diagram of the utility model.
[0021] Figure 2 For the utility model Figure 1 Partial enlarged view of A in it.
[0022] Figure 3 It is a schematic diagram of the adhesive structure of the utility model.
[0023] Figure 4 It is a schematic diagram of a partial front cross-section of the utility model.
[0024] Figure 5 For the utility model Figure 4 Partial enlarged view of B in it.
[0025] Figure 6 For the utility model Figure 4 Partial enlarged view of C in it.
[0026] Annotation of reference numerals in the drawings: 101, first support frame; 102, second support frame; 103, first unwinding mechanism; 104, second unwinding mechanism; 105, printing mechanism; 201, first guide roller; 202, second guide roller; 203, third guide roller; 204, guide rail; 205, moving frame; 206, guide wheel; 207, pressing plate; 208, quick-release screw; 209, fourth guide roller; 210, fixed seat; 211, limit pin; 301, sliding box; 302, support plate; 303, first telescopic cylinder; 304, bottom plate; 305, partition plate; 306, top plate; 401, negative pressure box; 402, first air vent; 403, T-shaped connection block; 404, second telescopic cylinder; 405, C-shaped connection block; 406, L-shaped sliding groove; 407, guide block; 501, cutting box; 502, third telescopic cylinder; 503, negative pressure chamber; 504, second air vent; 505, cutting chamber; 506, cutting port; 507, fourth telescopic cylinder; 508, cutting knife. Detailed Description of the Invention
[0027] In order to make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0028] In one embodiment, as Figures 1-6 shown, a paper roll switching device for a printing press includes a support frame disposed on the ground. On the ground on both the left and right sides of the support frame, a first unwinding mechanism 103 and a second unwinding mechanism 104 are symmetrically provided. A printing mechanism 105 is provided at the upper end of the support frame. The support frame includes a first support frame 101 and a second support frame 102 that are disposed on the ground and connected to each other. A guide roller group for guiding the paper tape is provided on the support frame. A traction structure for pulling the leading end of the paper roll is provided on the support frame. A pair of sliding boxes 301 are symmetrically and slidably provided on the support frame. A lifting structure for driving the sliding boxes 301 to rise and fall is provided on the support frame. A cutting structure for cutting the paper tape is provided on the sliding boxes 301. A bonding structure for bonding the leading end and the trailing end is provided on the sliding boxes 301.
[0029] In this embodiment, when switching the paper roll, first use the traction structure to pull the leading end of the new paper roll to be fixed above the sliding box 301. When the remaining amount of the old paper roll is low and the paper roll needs to be replaced, the unwinding mechanism and the printing mechanism are stopped. The cutting structure simultaneously cuts the old paper tape and the new paper tape. The bonding structure bonds the leading end of the new paper tape to the trailing end of the old paper tape, and then continues production.
[0030] In one embodiment, as Figures 1-3 shown, the guide roller group includes a pair of first guide rollers 201, a pair of second guide rollers 202, and a pair of third guide rollers 203 that are symmetrically and rotatably provided on the support frame. The traction structure includes guide rails 204 that are symmetrically provided on the support frame. The guide rails 204 are integrally L-shaped, and the cross-section of the guide rails 204 is T-shaped. A moving frame 205 is slidably provided on the guide rails 204. Two quick-release screws 208 are threadedly connected to the moving frame 205. A pressing plate 207 is penetrated by the two quick-release screws 208. A limiting component for preventing the moving frame 205 from automatically falling along the guide rails 204 is provided on the support frame. The limiting component includes a fixed seat 210 provided on the support frame. A limiting pin 211 is penetrated through the fixed seat 210. There is a sliding damping between the fixed seat 210 and the limiting pin 211. During traction, first loosen the two quick-release screws 208, insert the leading end of the paper tape between the pressing plate 207 and the moving frame 205, lock the two quick-release screws 208 to fix the leading end of the paper tape, pull the moving frame 205 to move the moving frame 205 upward along the guide rails 204. When the moving frame 205 moves above the limiting pin 211, pull the limiting pin 211 to make the limiting pin 211 contact the guide rails 204, and the limiting pin 211 prevents the moving frame 205 from automatically falling along the guide rails 204.
[0031] In one embodiment, as Figure 2As shown, three guide wheels 206 are rotatably provided on the moving frame 205. The guide wheels 206 are in rolling contact with the guide rail 204, reducing the moving resistance of the moving frame 205 on the guide rail 204.
[0032] In one embodiment, as Figure 2 shown, a fourth guide roller 209 is rotatably provided on the side of the pressing plate 207 away from the moving frame 205. During normal production, the fourth guide roller 209 is in rolling contact with the paper tape, preventing scratching between the paper tape and the moving frame 205.
[0033] In one embodiment, as Figure 1 shown, the lifting structure includes support plates 302 symmetrically arranged at the lower end of the support frame. A first telescopic cylinder 303 is provided on the support plates 302. The output end of the first telescopic cylinder 303 is connected to the lower surface of the sliding box 301. The first telescopic cylinder 303 drives the sliding box 301 to rise and fall on the support frame by telescoping.
[0034] In one embodiment, as Figure 4 and Figure 6 shown, the lower end of the sliding box 301 is a bottom plate 304, the upper end of the sliding box 301 is a top plate 306, and a partition 305 is provided between the bottom plate 304 and the top plate 306 on the sliding box 301. The cutting structure includes a cutting box 501 slidably arranged between the partition 305 and the top plate 306. A third telescopic cylinder 502 for driving the cutting box 501 to slide on the sliding box 301 is provided on the sliding box 301. The output end of the third telescopic cylinder 502 is connected to the cutting box 501. A cutting cavity 505 is provided in the cutting box 501. A cutting port 506 is provided on the side of the cutting cavity 505 away from the third telescopic cylinder 502. A negative pressure cavity 503 is provided below the cutting port 506 on the cutting box 501. A second ventilation hole 504 is densely provided on the side of the negative pressure cavity 503 away from the third telescopic cylinder 502. A cutting knife 508 matching the cutting port 506 is slidably arranged in the cutting port 506 on the second support frame 102. A fourth telescopic cylinder 507 for driving the cutting knife 508 to slide in the cutting port 506 is provided in the cutting cavity 505 on the second support frame 102. The output end of the fourth telescopic cylinder 507 is connected to the cutting knife 508. During cutting, the two third telescopic cylinders 502 act simultaneously, driving the two sliding boxes 301 to approach each other, pressing the two paper tapes together. The fourth telescopic cylinder 507 on the second support frame 102 acts, and the two paper tapes are simultaneously cut by the cutting knife 508. The negative pressure cavity 503 is connected to the negative pressure pipeline, and the paper tape ports are adsorbed and fixed through the second ventilation holes 504.
[0035] In one embodiment, as Figures 3-5As shown, the bonding structure includes a negative pressure box 401 slidably arranged between a bottom plate 304 and a partition plate 305. A second telescopic cylinder 404 for driving the negative pressure box 401 to slide on the sliding box 301 is provided on the sliding box 301. A C-shaped connecting block 405 is provided at the output end of the second telescopic cylinder 404. A T-shaped connecting block 403 matching the C-shaped connecting block 405 is provided on the negative pressure box 401. The T-shaped connecting block 403 is slidably connected to the C-shaped connecting block 405. A plurality of first ventilation holes 402 are densely arranged on one side of the negative pressure box 401 away from the second telescopic cylinder 404. An L-shaped sliding groove 406 is provided on the bottom plate 304. A guide block 407 matching the L-shaped sliding groove 406 is provided on the lower surface of the negative pressure box 401. The guide block 407 is slidably arranged in the L-shaped sliding groove 406. Before the roll change operation, the negative pressure box 401 is located inside the sliding box 301. At this time, the guide block 407 is located at the corner of the L-shaped sliding groove 406. Pull the negative pressure box 401 laterally. The T-shaped connecting block 403 is separated from the C-shaped connecting block 405. Pull the negative pressure box 401 to the outside of the sliding box 301. The negative pressure box 401 is connected to the negative pressure pipeline. Attach the back of the adhesive tape to the first ventilation holes 402 on the negative pressure box 401. Then push the negative pressure box 401 back. The T-shaped connecting block 403 and the C-shaped connecting block 405 are re-locked. When bonding, the first telescopic cylinder 303 on one side extends to make the negative pressure box 401 face the paper tape break point position. The second telescopic cylinder 404 extends. Using the cutting box 501 as a support, the leading end and the trailing end are bonded with the adhesive tape.
[0036] The above embodiment discloses a paper roll switching device for a printing press. In the initial state, the equipment is running normally. When the remaining amount of the paper roll on the second unwinding mechanism 104 is low and it is necessary to switch to the first unwinding mechanism 103 to supply the paper tape to the printing mechanism 105, first pull down the moving frame 205 to the lower end of the guide rail 204, loosen the two quick-release screws 208, insert the paper tape head between the pressure plate 207 and the moving frame 205, and lock the two quick-release screws 208 to fix the paper tape head. Then pull the moving frame 205 to move the moving frame 205 upward along the guide rail 204. When the moving frame 205 moves above the limit pin 211, pull the limit pin 211 to make the limit pin 211 contact the guide rail 204. The limit pin 211 prevents the moving frame 205 from automatically falling along the guide rail 204, completing the traction and fixation of the paper tape head on the first unwinding mechanism 103. The printing mechanism 105 and the second unwinding mechanism 104 stop running. The two third telescopic cylinders 502 act simultaneously to drive the two sliding boxes 301 to approach each other, pressing the two paper tapes together. The fourth telescopic cylinder 507 on the second support frame 102 acts to cut the two paper tapes simultaneously through the cutting knife 508. At this time, the lower half of the paper tape near the second unwinding mechanism 104 should fall naturally due to gravity, and the upper half is fixed inside the printing mechanism 105, that is, the tail of the paper tape near the second unwinding mechanism 104 is fixed. The negative pressure chamber 503 near the first unwinding mechanism 103 is connected to the negative pressure pipeline to adsorb and fix the head of the paper tape near the first unwinding mechanism 103. Pull the negative pressure box 401 laterally, and the T-shaped connecting block 403 is disengaged from the C-shaped connecting block 405. Pull the negative pressure box 401 to the outside of the sliding box 301. The negative pressure box 401 is connected to the negative pressure pipeline, and the back of the adhesive tape is attached to the first ventilation hole 402 on the negative pressure box 401. Then push the negative pressure box 401 back, and the T-shaped connecting block 403 is re-locked with the C-shaped connecting block 405. The third telescopic cylinder 502 and the fourth telescopic cylinder 507 near the second unwinding mechanism 104 retract, and the first telescopic cylinder 303 near the second unwinding mechanism 104 extends to make the negative pressure box 401 near the second unwinding mechanism 104 face the paper tape break point position. The second telescopic cylinder 404 near the second unwinding mechanism 104 extends, and using the cutting box 501 near the first unwinding mechanism 103 as a support, the head and the tail are bonded together with the adhesive tape adsorbed on the negative pressure box 401 near the second unwinding mechanism 104. Then the negative pressure chamber 503 near the first unwinding mechanism 103 disconnects from the negative pressure pipeline, and the third telescopic cylinder 502 near the first unwinding mechanism 103 retracts. The first telescopic cylinder 303 near the first unwinding mechanism 103 extends to make the negative pressure box 401 near the first unwinding mechanism 103 face the paper tape break point. Using the negative pressure box 401 near the second unwinding mechanism 104 as a support, the head and the tail are bonded with the adhesive tape adsorbed on the negative pressure box 401 near the first unwinding mechanism 103, realizing double-sided bonding of the paper tape with firm connection. Then the two negative pressure boxes 401 disconnect from the negative pressure pipeline, the two second telescopic cylinders 404 retract, and the two first telescopic cylinders 303 retract.The first unwinding mechanism 103 and the printing mechanism 105 are started to continue production.,
[0037] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.
Claims
1. A paper roll switching device for a printing press, comprising a support frame arranged on the ground. On the ground on the left and right sides of the support frame, a first unwinding mechanism (103) and a second unwinding mechanism (104) are symmetrically arranged. The upper end of the support frame is provided with a printing mechanism (105), and it is characterized in that, The support frame includes a first support frame (101) and a second support frame (102) which are arranged on the ground and connected to each other. A guide roller set for guiding the paper tape is provided on the support frame. A traction structure for pulling the leading end of the paper roll is provided on the support frame. A pair of sliding boxes (301) are symmetrically and slidably arranged on the support frame. A lifting structure for driving the sliding box (301) to lift and lower is provided on the support frame. A cutting structure for cutting the paper tape is provided on the sliding box (301). A bonding structure for bonding the leading end and the trailing end is provided on the sliding box (301).
2. The paper roll switching device of a printing machine according to claim 1, characterized in that The guide roller set includes a pair of first guide rollers (201), a pair of second guide rollers (202) and a pair of third guide rollers (203) which are symmetrically and rotatably arranged on the support frame.
3. The paper roll switching device of a printing press according to claim 1, characterized in that, The traction structure includes guide rails (204) symmetrically arranged on the support frame. The guide rails (204) are integrally L-shaped, the cross section of the guide rails (204) is T-shaped, a moving frame (205) is slidably arranged on the guide rails (204), two quick-release screws (208) are threadedly connected to the moving frame (205), a pressing plate (207) is arranged on the two quick-release screws (208), and a limiting component for preventing the moving frame (205) from automatically falling along the guide rails (204) is provided on the support frame.
4. The paper roll switching device of a printing press according to claim 3, wherein, The limiting component includes a fixed seat (210) arranged on the support frame, a limiting pin (211) is arranged through the fixed seat (210), and there is a sliding damping between the fixed seat (210) and the limiting pin (211).
5. The paper roll switching device of a printing press according to claim 3, characterized in that, Three guide wheels (206) are rotatably arranged on the moving frame (205), and the guide wheels (206) are in rolling contact with the guide rails (204).
6. The paper roll switching device of a printing press according to claim 3, characterized in that A fourth guide roller (209) is rotatably arranged on the side of the pressing plate (207) away from the moving frame (205).
7. The paper roll switching device of a printing press according to claim 1, wherein The lifting structure includes support plates (302) symmetrically arranged at the lower end of the support frame. A first telescopic cylinder (303) is arranged on the support plates (302), and the output end of the first telescopic cylinder (303) is connected to the lower surface of the sliding box (301).
8. A paper roll switching device for a printing press according to claim 1, characterized in that, The lower end of the sliding box (301) is a bottom plate (304), the upper end of the sliding box (301) is a top plate (306), and a partition plate (305) is provided between the bottom plate (304) and the top plate (306) on the sliding box (301). The cutting structure includes a cutting box (501) slidably arranged between the partition plate (305) and the top plate (306). A third telescopic cylinder (502) for driving the cutting box (501) to slide on the sliding box (301) is provided on the sliding box (301). The output end of the third telescopic cylinder (502) is connected to the cutting box (501). A cutting cavity (505) is provided in the cutting box (501). A cutting opening (506) is provided on one side of the cutting cavity (505) away from the third telescopic cylinder (502). A negative pressure cavity (503) is provided below the cutting opening (506) on the cutting box (501). A second air vent hole (504) is densely provided on one side of the negative pressure cavity (503) away from the third telescopic cylinder (502). A cutting knife (508) matching the cutting opening (506) is slidably arranged in the cutting opening (506) on the second support frame (102). A fourth telescopic cylinder (507) for driving the cutting knife (508) to slide in the cutting opening (506) is provided in the cutting cavity (505) on the second support frame (102). The output end of the fourth telescopic cylinder (507) is connected to the cutting knife (508).
9. The paper roll switching device of a printing press according to claim 7, characterized in that, The bonding structure includes a negative pressure box (401) slidably arranged between the bottom plate (304) and the partition plate (305). A second telescopic cylinder (404) for driving the negative pressure box (401) to slide on the sliding box (301) is provided on the sliding box (301). A C-shaped connecting block (405) is provided at the output end of the second telescopic cylinder (404). A T-shaped connecting block (403) matching the C-shaped connecting block (405) is provided on the negative pressure box (401). The T-shaped connecting block (403) is slidably connected to the C-shaped connecting block (405). A first air vent hole (402) is densely provided on one side of the negative pressure box (401) away from the second telescopic cylinder (404). An L-shaped sliding groove (406) is provided on the bottom plate (304). A guiding block (407) matching the L-shaped sliding groove (406) is provided on the lower surface of the negative pressure box (401). The guiding block (407) is slidably arranged in the L-shaped sliding groove (406).