A twin roll outfeed assembly
By designing the support rod and moving plate of the double-roller feeding assembly, the problem of bending of the unloading roller in the inkjet printer is solved, achieving stable canvas feeding and improved printing quality.
Patent Information
- Application Number
- CN202522508300.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-26
AI Technical Summary
After prolonged use, the unwind roller of a large-format printer is prone to bending due to its own weight and the weight of the canvas above it, resulting in poor printing quality.
The dual-roller feeding assembly uses a combination design of support bars, moving plates, support rollers and connectors. The support rollers exert an upward force on the rotating rollers to prevent the middle of the rotating rollers from sagging, and the connecting seats are fixed by fasteners to ensure stable canvas feeding.
It effectively prevents the rollers from bending, ensuring stable canvas transport and printing quality, reducing frictional resistance, and improving printing efficiency.
Smart Images
Figure CN224928729U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inkjet printing technology, and in particular to a double-roller feeding assembly. Background Technology
[0002] A large-format printer is a type of printer. Large-format printers use solvent-based or UV-cured inks. Solvent-based inks have a strong odor and are corrosive. During printing, the ink penetrates the printing material through corrosion, making the image less prone to fading. Therefore, they are waterproof, UV-resistant, and scratch-resistant.
[0003] When a printer prints a pattern onto a canvas, the canvas wound on a roll is first placed on the upper part between the two unwinding rollers of the printer. Then, the end of the canvas is connected to the conveyor mechanism on the printer. The unwinding roller drives the roll of canvas to rotate, and the roll releases the entire canvas. The conveyor mechanism transports the released canvas to the printing area for printing. Different patterns require different widths of canvas. Therefore, in order to print on canvases of different widths, printers are usually designed to be very long, and the unwinding rollers that are matched with them are naturally also relatively long. The longer unwinding rollers are subjected to a larger bending moment under their own weight and the weight of the canvas above them, and the middle of the unwinding roller will sag and bend to a certain extent. Utility Model Content
[0004] The purpose of this invention is to provide a double-roller feeding assembly to solve the above-mentioned problems.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A double-roller feeding assembly includes a base with two side plates fixedly connected to it. Two horizontal rollers are rotatably connected between the two side plates. Each roller is rotatably connected to the two side plates at both ends. A support rod is provided below the two rollers. A support base is fixedly connected to the middle of the support rod. A connecting assembly is provided on the support base. A movable plate is connected to the support base via the connecting assembly. The movable plate is connected to the support assembly. Two movable pieces are slidably connected to the support rod. The two movable pieces are located on opposite sides of the support base. A fixing assembly one is provided between the movable pieces and the support rod. A connecting seat is fixedly connected to the upper part of each movable piece. A fixing assembly two is provided between the connecting seat and the support rod. The connecting seat extends above the space between the two rollers. A connecting block is vertically slidably connected to the connecting seat. A turntable is rotatably connected to the connecting block.
[0006] Using the above technical solution, the connecting piece drives the moving plate to rise, and the moving plate drives its upper support assembly to contact the two rotating rollers. Then, the canvas roll, formed by the fabric roll wound on the drum, is placed on the upper part between the two rotating rollers, and the fabric roll is positioned between the two connecting seats. The fabric roll exerts a downward force on the two rotating rollers, the rotating rollers exert a downward force on the support assembly, the support seat assembly exerts a downward force on the moving plate, the moving plate exerts a downward force on the support seat through the connecting piece, and the support seat exerts a force on the support rod. The support rod withstands the pressure generated by the weight of the fabric roll, thereby causing the support assembly to exert an upward force on the middle of the two rotating rollers, preventing the force of the fabric roll on the rotating rollers from causing the middle of the rotating rollers to sag and bend. Then, the two connecting seats are moved so that they are respectively close to the two ends of the fabric roll drum. At the same time, the connecting seats drive the moving piece, connecting block, and turntable connected to them to move. Then, the turntable on each connecting seat is moved vertically so that the turntable is aligned with the end of the drum it is close to. The roll is opened at the top, and then the two connecting seats are moved horizontally so that the turntables on the two connecting seats are inserted into the openings at the ends of the roll, and the outer wall of the turntables contacts the inner wall of the roll. Then, the two moving pieces are fixed to the support rod by fixing component one and fixing component two, thereby fixing the two connecting seats. At the same time, the turntables are restricted by the inner wall of the roll and will not move up or down relative to the roll. Then, the head of the roll is pulled out and connected to the conveying mechanism of the inkjet printer. The roller drives the roll and the roll to rotate, and the roll releases the canvas around its body. The conveying mechanism transports the released canvas to the printing area for printing. In this way, the amount of canvas on the roll gradually decreases, the diameter of the roll decreases, and the roll gradually descends and its height decreases. At the same time, the turntable connected to the roll also descends with the roll. During the rotation of the roll, the two connecting seats limit the left and right sides of the roll, and the roll limits the front and back sides of the roll, preventing the roller from moving left and right or front and back during the rotation of the roll and causing the roll to fall off the roller.
[0007] Preferably, the connecting assembly includes a bolt and a guide post; at least two vertical bolts are threaded onto the support base; at least two vertical guide posts are fixedly connected to the bottom of the movable plate; the guide post of the movable plate passes through the upper surface of the support base; the guide post is vertically slidably connected to the support base; and the upper end of the bolt contacts the lower bottom surface of the movable plate.
[0008] Using the above technical solution, tightening bolt one on the support base pushes the moving plate upward relative to the support base. The moving plate drives guide column one to move relative to the support base. Guide column one and the support base limit and guide the movement of the support plate. At the same time, the moving plate drives the support assembly to rise, so that the support assembly contacts the two rotating rollers.
[0009] Preferably, the support assembly includes two pairs of support rollers, which are horizontally rotatably connected to the upper surface of the movable plate. The two pairs of support rollers are respectively opposite to two rotating rollers, and each rotating roller is located above the two support rollers of the same pair opposite it.
[0010] By adopting the above technical solution, the connecting parts drive the moving plate to rise, and the moving plate drives the two pairs of support rollers on its upper part to rise, so that each pair of support rollers contacts the rotating roller opposite it and generates an upward force on the rotating roller. The rotation of the rotating roller drives the support roller in contact with it to rotate at the same time, reducing the friction between the rotating roller and the moving plate and reducing the resistance encountered by the rotating roller when it rotates.
[0011] Preferably, the movable piece is U-shaped, with its opening enclosing the upper surface and two sides of the support rod. Horizontal limiting grooves are respectively provided on the two sides of the support rod. The fixing component includes a bolt and a slider. The slider is embedded in the limiting groove on one side of the support rod and is slidably connected to the support rod. The bolt passes horizontally through the side wall of the U-shaped movable piece and is rotatably connected to the movable piece. The end of the bolt is threadedly connected to the slider in the limiting groove of the support rod.
[0012] Using the above technical solution, when bolt 2 is tightened, bolt 2 causes slider 1 to press against the side wall of the limiting groove where slider 1 is located, which is in contact with the moving piece. At the same time, the tail of bolt 2 presses against the side wall of the moving plate, thereby fixing the moving piece in place, and then fixing the connecting seat fixed to the moving piece onto the support rod.
[0013] Preferably, the second fixing component includes a corrugated handwheel and a second slider. The corrugated handwheel is vertically rotatably connected to the connecting seat. The second slider is embedded in the limiting groove on the upper surface of the support rod and is slidably connected to the support rod. The lower end of the corrugated handwheel passes through the moving piece and is rotatably connected to the moving piece. The lower end of the corrugated handwheel is threadedly connected to the second slider located in the limiting groove on the upper surface of the support rod.
[0014] Using the above technical solution, turning the corrugated handwheel causes the second slider, which is threadedly connected to it, to press against the upper side wall of the limiting groove where the second slider is located. At the same time, the moving piece presses against the upper surface of the support rod to further fix the moving piece and improve the fixing effect of the moving piece and the connecting seat.
[0015] Preferably, each connecting seat is fixedly connected to two vertical guide rods, and the two guide rods on the connecting seat pass through the connecting block on the connecting seat, with the guide rods slidably connected to the connecting block.
[0016] Using the above technical solution, the connecting block connected to the guide rods moves vertically along the two guide rods. The guide rods limit and guide the movement of the connecting block, increasing the stability of the moving connecting block.
[0017] Preferably, a limiting block is fixedly connected to the lower end of the guide post at the bottom of the movable plate, and the limiting block is located below the support base.
[0018] Using the above technical solution, the limiting block blocks the bottom of the support base to prevent the moving plate from detaching from the support base.
[0019] Preferably, slider one and slider two are respectively fixedly connected with guide post two and guide post three. The guide post two of slider one passes through the side surface of the movable piece and is slidably connected to the movable piece. The guide post three of slider two passes through the upper surface of the movable piece and is slidably connected to the movable piece.
[0020] Using the above technical solution, the bolt 2 and the corrugated handwheel are turned respectively. The bolt 2 and the corrugated handwheel drive the slider 1 and slider 2 connected to each other to move. The slider 1 and slider 2 drive the guide post 2 and guide post 3 connected to each other to move relative to the connecting piece. The guide post limits and guides the movement of the slider, increasing the stability of the slider movement. Attached Figure Description
[0021] Figure 1 This is an overall schematic diagram of the embodiment; Figure 2 This is a front view of an embodiment; Figure 3 This is a top view of an embodiment; Figure 4 This is a side view of an embodiment; Figure 5 This is a sectional view along line AA; Figure 6 This is a sectional view along the BB direction; Figure 7 This is a sectional view along the CC direction; Figure 8 This is a schematic diagram showing the connection between the support base and the movable plate; Figure 9 This is a schematic diagram showing the connection between the movable piece and the support rod; Figure 10 This is a structural schematic diagram of fixed component two; Figure 11 This is a schematic diagram of slider one and slider two as a whole; Figure 12 This is an enlarged view of point A; Figure 13 Enlarged schematic diagram of point B Figure 14 This is an enlarged schematic diagram of point C.
[0022] Reference numerals in the attached diagram: 1. Side plate; 2. Rotary roller; 3. Support rod; 4. Support base; 5. Moving plate; 6. Moving piece; 7. Connecting seat; 8. Connecting block; 9. Turntable; 10. Bolt 1; 11. Guide post 1; 12. Support roller; 13. Limiting groove; 14. Bolt 2; 15. Slider 1; 16. Corrugated handwheel; 17. Slider 2; 18. Guide rod; 19. Limiting block; 20. Guide post 2; 21. Guide post 3. Detailed Implementation
[0023] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model should be considered within the protection scope of this utility model. It should also be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
[0024] See Figures 1 to 4 A double-roller feeding assembly includes a base with two side plates 1 fixedly connected to it. Two horizontal rollers 2 are rotatably connected between the two side plates 1, and both ends of each roller 2 are rotatably connected to the two side plates 1 respectively. A motor is fixedly connected to the base near one of the side plates 1. Gears are fixedly connected to the ends of the two rollers 2 connected to the motor near the side plate 1. The output shaft of the motor is fixedly connected to a gear, and the side plate 1 is fixedly and rotatably connected to a gear. The gears on the side plate 1 mesh with the gears on the motor output shaft and the gears at the ends of the two rollers 2. A horizontal support bar 3 is provided below the two rollers 2. The support bar 3 is composed of two profiles located on the same straight line. The upper, lower, front, and rear surfaces of the profiles are provided with limiting grooves 13. The two profiles are fixedly connected to the two side plates 1 respectively. There is a gap between the ends of the two profiles, and a support seat 4 is provided at the gap between the two profiles. The support seat 4 is fixedly connected to the two profiles, connecting the two profiles together.
[0025] See Figure 5 , Figure 7 , Figure 8 , Figure 12 and Figure 14At least two vertical bolts 10 are threaded onto the support base 4. A movable plate 5 is positioned above the support base 4, and at least two vertical guide posts 11 are fixedly connected to the bottom of the movable plate 5. The guide posts 11 of the movable plate 5 pass through the upper surface of the support base 4. A limiting block 19 is fixedly connected to the lower end of each guide post 11. The limiting block 19 is located below the support base 4 and is specifically a nut, which is fixed to the guide post 11 by threaded connection. The guide post 11 is slidably connected to the support base 4. The upper end of the bolts 10 contacts the lower bottom surface of the movable plate 5. Two pairs of horizontal support rollers 12 are rotatably connected to the upper surface of the movable plate 5. The two pairs of support rollers 12 are respectively opposite to two rotating rollers 2, and each rotating roller 2 is located above the two support rollers 12 of the same pair opposite it.
[0026] See Figure 6 , Figure 7 , Figure 9 , Figure 11 and Figure 13 U-shaped movable pieces 6 are slidably connected to the two profiles of the support rod 3. The two movable pieces 6 are located on both sides of the support base 4 and between the two rotating rollers 2. The opening of the U-shaped movable piece 6 is embedded in the top and bottom surfaces and both sides of the profile it is on. A slider 15 is embedded in the limiting groove 13 on one side of each profile and is slidably connected to the profile. A horizontal bolt 24 passes through the side wall of the U-shaped movable piece 6 and is rotatably connected to the movable piece 6. The end of the bolt 24 is threadedly connected to the slider 15 in the limiting groove 13 of the support rod 3. A guide post 20 is fixedly connected to the slider 15. The guide post 20 is a bolt and is threadedly connected to the slider 15, thereby fixing it to the slider 15. The guide post 20 of the slider 15 passes through the side surface of the movable piece 6 where the bolt 24 is located and is slidably connected to the movable piece 6.
[0027] See Figure 9 , Figure 10 and Figure 11Each movable piece 6 has a connecting seat 7 fixedly connected to its upper surface. The connecting seat 7 includes an upper base plate, a lower base plate, and a vertical plate. The upper and lower base plates are fixedly connected to both ends of the vertical plate. The lower base plate of the connecting seat 7 is fixedly connected to the upper surface of the movable piece 6 it is located on. One end of the connecting seat 7 connected to the upper base plate extends above the space between the two rotating rollers 2. Two vertical guide rods 18 are fixedly connected between the upper and lower base plates of each connecting seat 7. Each connecting seat 7 is connected to a connecting block 8. The two guide rods 18 on the connecting seat 7 where the connecting block 8 is located pass through the connecting block 8, and the connecting block 8 can slide vertically along the guide rods 18. A corrugated handwheel 16 is also included. The corrugated handwheel 16 passes vertically through the upper and lower base plates of the connecting seat 7 and the upper surface of the movable piece 6. The corrugated handwheel 16 is rotatably connected to the connecting seat 7 and the movable piece 6. A slider 2 17 is embedded in the limiting groove 13 on the upper surface of the profile. The lower end of the corrugated handwheel 16 is threadedly connected to the slider 2 17. The slider 2 17 is fixedly connected to the guide post 3 21, which is specifically a bolt. The guide post 3 21 is threadedly connected to the slider 2 17, thereby fixing it to the slider 2 17. The guide post 3 21 passes through the upper surface of the movable piece 6 and is slidably connected to the movable piece 6.
[0028] Working principle: Tightening bolt 10 on support base 4 pushes movable plate 5 upward relative to support base 4. Movable plate 5 drives guide post 11 to move relative to support base 4. Guide post 11 and support base 4 limit and guide the movement of support plate. Movable plate 5 drives the two pairs of support rollers 12 on its upper part to rise, so that each pair of support rollers 12 contacts the rotating roller 2 opposite to it. Then, the canvas roll formed by the roll wound on the spool is placed on the upper part between the two rotating rollers 2, and the cloth roll is positioned between the two connecting seats 7. The fabric roll exerts a downward force on the two rotating rollers 2. Each rotating roller 2 exerts a downward force on the two support rollers 12 in contact with it. The support rollers 12 exert a downward force on the moving plate 5. The moving plate 5 exerts a downward force on the bolt 10. The bolt 10 exerts a downward force on the support seat 4. The support seat 4 exerts a force on the support rod 3. The support rod 3 withstands the pressure generated by the weight of the fabric roll, thereby causing the support rollers 12 to exert an upward force on the middle of the two rotating rollers 2, preventing the force of the fabric roll on the rotating rollers 2 from causing the middle of the rotating rollers 2 to sag and bend.
[0029] Then, move the two connecting seats 7 so that they are close to both ends of the fabric roll. At the same time, the connecting seats 7 drive the moving piece 6, connecting block 8, and turntable 9 connected to them to move. Then, move the turntable 9 on each connecting seat 7 vertically so that the turntable 9 is aligned with the end opening of the roll it is close to. Then, move the two connecting seats 7 horizontally so that the turntables 9 on the two connecting seats 7 are inserted into the openings at the ends of the rolls, and the outer wall of the turntable 9 contacts the inner wall of the roll. Tighten bolt 14. Bolt 14 drives slider 15 to press against the side wall of the limiting groove 13 where slider 15 is located, which is in contact with the moving piece 6. At the same time, the tail of bolt 14 presses against the side wall of the moving plate 5, thereby fixing the moving piece 6 in place. Then, the connecting seat 7 fixed to the moving piece 6 is fixed to the support rod 3. Then, the corrugated handwheel 16 is turned, causing the screw-connected slider 17 to press against the upper side wall of the limiting groove 13 where the slider 17 is located. At the same time, the movable piece 6 presses against the upper surface of the support rod 3, further fixing the movable piece 6 and improving the fixing effect between the movable piece 6 and the connecting seat 7. Meanwhile, the turntable 9 is restricted by the inner wall of the drum and will not move upward or downward relative to the drum.
[0030] Then, the head of the fabric roll is pulled out and connected to the conveyor mechanism of the inkjet printer. The motor drives two rotating rollers 2 to rotate in the same direction through a gear set. The two rotating rollers 2 drive the fabric roll and the drum to rotate, and at the same time, the rotating rollers 2 drive the support rollers 12 to rotate. The rotating drum releases the canvas around its body, and the conveyor mechanism transports the released canvas to the inkjet printing area for printing. In this way, the amount of canvas on the drum gradually decreases, the diameter of the fabric roll decreases, and the drum gradually descends and its height decreases. At the same time, the turntable 9 connected to the drum also descends with the drum. During the rotation of the fabric roll, the two connecting seats 7 limit the left and right sides of the fabric roll, and the drum limits the front and back sides of the fabric roll to prevent the rotating rollers 2 from moving left and right or front and back during the rotation of the fabric roll, causing the fabric roll to fall off the rotating rollers 2.
Claims
1. A double-roller feeding assembly, comprising a base, on which two side plates (1) are fixedly connected, and two horizontal rotating rollers (2) are rotatably connected between the two side plates (1), wherein both ends of each rotating roller (2) are rotatably connected to the two side plates (1), characterized in that, A support rod (3) is provided below the two rotating rollers (2). A support base (4) is fixedly connected to the middle of the support rod (3). A connecting component is provided on the support base (4). A movable plate (5) is connected above the support base (4) through the connecting component. The movable plate (5) is connected to the support component. Two movable pieces (6) are slidably connected on the support rod (3). The two movable pieces (6) are located on both sides of the support base (4). A fixing component one is provided between the movable piece (6) and the support rod (3). A connecting seat (7) is fixedly connected to the upper part of each movable piece (6). A fixing component two is provided between the connecting seat (7) and the support rod (3). The connecting seat (7) extends above the two rotating rollers (2). A connecting block (8) is vertically slidably connected to the connecting seat (7). A turntable (9) is rotatably connected to the connecting block (8).
2. The double-roller feeding assembly according to claim 1, characterized in that, The connecting assembly includes a bolt (10) and a guide post (11). At least two vertical bolts (10) are threaded onto the support base (4). At least two vertical guide posts (11) are fixedly connected to the bottom of the moving plate (5). The guide post (11) of the moving plate (5) passes through the upper surface of the support base (4). The guide post (11) is slidably connected to the support base (4). The upper end of the bolt (10) contacts the lower bottom surface of the moving plate (5).
3. The double-roller feeding assembly according to claim 1, characterized in that, The support assembly includes two pairs of support rollers (12), which are horizontally rotatably connected to the upper surface of the movable plate (5). The two pairs of support rollers (12) are respectively opposite to two rotating rollers (2), and each rotating roller (2) is located above the two support rollers (12) of the same pair opposite it.
4. The double-roller feeding assembly according to claim 1, characterized in that, The movable piece (6) is U-shaped. The opening of the U-shaped movable piece (6) is embedded in the upper surface and two sides of the support rod (3). The two sides of the support rod (3) are respectively provided with horizontal limiting grooves (13). The fixing component includes bolt two (14) and slider one (15). The slider one (15) is embedded in the limiting groove (13) on one side of the support rod (3). The slider one (15) is slidably connected to the support rod (3). The bolt two (14) passes horizontally through the side wall of the U-shaped movable piece (6). The bolt two (14) is rotatably connected to the movable piece (6). The end of the bolt two (14) is threadedly connected to the slider one (15) in the limiting groove (13) of the support rod (3).
5. A double-roller feeding assembly according to claim 1, characterized in that, The second fixing component includes a corrugated handwheel (16) and a second slider (17). The corrugated handwheel (16) is vertically rotatably connected to the connecting seat (7). The second slider (17) is embedded in the limiting groove (13) on the upper surface of the support rod (3). The second slider (17) is slidably connected to the support rod (3). The lower end of the corrugated handwheel (16) passes through the moving piece (6). The corrugated handwheel (16) is rotatably connected to the moving piece (6). The lower end of the corrugated handwheel (16) is threadedly connected to the second slider (17) located in the limiting groove (13) on the upper surface of the support rod (3).
6. A double-roller feeding assembly according to claim 1, characterized in that, Each connecting seat (7) is fixedly connected to two vertical guide rods (18), and the two guide rods (18) on the connecting seat (7) pass through the connecting block (8) on the connecting seat (7), and the guide rods (18) are slidably connected to the connecting block (8).
7. A double-roller feeding assembly according to claim 1, characterized in that, The lower end of the guide post 1 (11) at the bottom of the movable plate (5) is fixedly connected to a limiting block (19), which is located below the support base (4).
8. A double-roller feeding assembly according to claim 4, characterized in that, The slider 1 (15) and slider 2 (17) are respectively fixedly connected to guide post 2 (20) and guide post 3 (21). The guide post 2 (20) of slider 1 (15) passes through the side surface of the moving piece (6) and is slidably connected to the moving piece (6). The guide post 3 (21) of slider 2 (17) passes through the upper surface of the moving piece (6) and is slidably connected to the moving piece (6).