Cigarette machine printing equipment

Abstract

This application discloses a cigarette-making machine printing device, comprising a fixed feeding mechanism for cigarette paper rolls, a tensioning mechanism for tightening the cigarette paper, and a printing mechanism for printing patterns or text. The tensioning mechanism includes a tension locking structure and a tension adjustment structure. The tension locking structure comprises an upper roller, a lower roller, and a fixed pulley connecting the upper roller and the lower roller. During installation, the cigarette paper presses against the lower roller and simultaneously raises the upper roller. The paper is then tensioned and fixed by the tension adjustment structure before passing through the printing mechanism for printing. The tension locking structure provided in this application can automatically disengage from the ink cartridge if the cigarette paper accidentally breaks. Simultaneously, the tension locking structure automatically clamps the cigarette paper to prevent it from rebounding freely, thereby facilitating maintenance by staff.

Description

Technical Field

[0001] The present application relates to the technical field of printing equipment, and in particular to a cigarette making machine printing equipment. Background Art

[0002] A cigarette making machine is a machine used to make cigarettes. It is able to automatically combine tobacco leaves, filters and cigarette paper and make them into the shape of cigarettes. Usually, the packaging material of tobacco products (such as cigarette paper) will have printed matter, such as the logo, graphics or trademark of the cigarette in question. Gravure printing is a printing method commonly used in magazines, etc., which allows high-quality printing of photographic copper plates or photographs. In gravure printing, printing ink is applied to a printing roller with a recessed pattern representing the text or image to be printed, and the printing ink is transferred to the paper to be printed. The speed of a typical gravure printing machine is 200 meters per minute to 400 meters per minute. The principle of the printing equipment in the cigarette making machine is similar to that of the cigarette paper. Generally, the cigarette paper is printed by a printing roller and a steel printing roller, and in the cigarette making machine printing equipment, the cigarette paper is usually arranged in rolls to ensure the efficiency of cigarette making.

[0003] To ensure printing quality, cigarette paper requires a certain level of tension and flatness to ensure legible text and accurate designs. Therefore, existing cigarette printing equipment is typically equipped with a tensioning mechanism. While this mechanism tightens the paper and resolves wrinkles, it also introduces the risk of paper breakage. Due to the interaction between the printing roller and the paper, and the tensioning mechanism acting on the paper, paper breakage can occur during printing. While adjusting the tension can mitigate this issue to some extent, reducing the tension also reduces the paper's flatness and cannot completely prevent breakage. When paper breaks during tensioning, it is prone to rebound due to its toughness. Since the machine may not be shut down in time, the continuously running feed roller will cause the paper reel to continue unloading. The paper at the break, unconstrained, rebounds and continues unloaded, resulting in a chaotic accumulation of paper in the work area. This disordered accumulation creates significant trouble for workers, and the paper is often scrapped due to folding, resulting in a certain degree of waste. Summary of the Invention

[0004] The purpose of the present application is to provide a cigarette making machine printing device that can be quickly repaired when the paper breaks unexpectedly.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a cigarette making machine printing device, comprising a fixed feeding mechanism for cigarette paper rolls, a tensioning mechanism for tensioning cigarette paper, and a printing mechanism for printing patterns or texts, the tensioning mechanism comprising a tension locking structure and a tension adjusting structure, the tension locking structure comprising an upper roller, a lower roller, and a connecting portion, the upper roller and the lower roller being slidably installed in the same vertical direction, and the upper roller and the lower roller being abutted in an initial state, the connecting portion being suitable for making the lower roller and the upper roller slide in different directions, and during normal operation, the cigarette paper is pressed to cause the lower roller to descend and the upper roller to rise at the same time; when the cigarette paper is used up or broken, the tension disappears, the upper roller is lowered by gravity, and the lower roller rises at the same time, so that the two automatically abut to clamp the cigarette paper, and then pass through the printing mechanism for printing.

[0006] As a preferred embodiment, the printing mechanism includes an ink roller and an ink cartridge, the ink cartridge includes an ink outlet, and the ink outlet is provided with an elastic sealing component. During installation, the cigarette paper tightens the tensioning mechanism, and the tensioning mechanism is suitable for displacement. When the tensioning mechanism is displaced, it acts on the ink roller to bring the ink roller closer and seal the periphery of the ink outlet, while squeezing the elastic sealing component to deform the elastic sealing component and open the ink outlet gap. The liquid in the ink cartridge slowly flows out through the ink outlet gap and soaks the ink roller, and the rotation of the ink roller ensures uniform inking.

[0007] As a preference, the tension locking structure also includes an elastic structure for resetting the lower roller, and the elastic structure is fixedly connected to the lower roller. After installation, the lower roller is initially located at the top of the elastic structure, and at the same time, the upper roller falls freely and abuts against the lower roller. At this time, the position of the lower roller at the top of the elastic structure and the position of the upper roller are the first set positions; after the cigarette paper is installed, the cigarette paper presses the lower roller downward, and when the lower roller moves downward, the upper roller is moved up by the fixed pulley to cancel the abutment between the two. At this time, the positions of the upper roller and the lower roller are the second set positions.

[0008] Preferably, the elastic structure includes a spring, a bearing mounting seat and a movable rod for limiting in the vertical direction; the top end of the movable rod is fixedly connected to the lower roller via the bearing mounting seat.

[0009] Preferably, the elastic sealing assembly includes a sealing portion for sealing and an elastic portion for supporting the sealing portion. The ink cartridge has a notch on a side close to the tensioning mechanism. The top of the sealing portion is hingedly mounted on the top of the inner wall of the notch. The elastic portion is suitable for making the bottom of the sealing portion close to and seal the notch. When the inking roller moves to the installation position, the inking roller is suitable for squeezing the sealing portion so that the sealing portion rotates around the hinged position, and at the same time compressing the elastic portion to form the ink outlet gap between the sealing portion and the notch.

[0010] Preferably, the inner wall of the notch is provided with a sealing protrusion that fits tightly with the sealing portion, and the inner wall of the sealing protrusion has a slope. When the sealing portion rotates, it fits and seals with the slope to reduce the opening area of the ink outlet gap formed.

[0011] As a preference, the inking roller is arranged at the middle of the side surface of the ink cartridge when in contact, so that the inking roller can better stir the liquid in the ink cartridge evenly when it rotates.

[0012] As a preference, the ink cartridge is further provided with an ink absorption part, which is arranged on the side of the bottom of the inner cavity of the ink cartridge close to the tensioning mechanism, the minimum setting value of the top height of the ink absorption part is the lowest height of the ink outlet gap, and the side of the ink absorption part located in the inner cavity of the ink cartridge close to the tensioning mechanism is the highest side of the ink absorption part.

[0013] Preferably, a deformation notch is provided in the middle of the bottom of the sealing protrusion, and correspondingly, the top of the ink absorbing portion includes a deformation portion, the width of the deformation portion is less than or equal to the width of the deformation notch, and in an initial state, the ink-feeding roller does not contact the ink cartridge. At this time, the sealing portion is close to the inclined surface, and correspondingly, the bottom of the sealing portion will squeeze and narrow the deformation portion and completely accommodate it within the range of the deformation notch.

[0014] As a preference, the tension locking structure also includes a mounting frame, the upper roller, the lower roller and the elastic structure are all mounted in the mounting frame, and there are two fixed pulleys in total, which are respectively fixed on both sides of the upper roller and the lower roller, and a slide groove for the upper roller and the lower roller to move up and down is provided on the wall surface of the mounting frame, and both ends of the upper roller and the lower roller are provided with a limit slider to limit sliding in the slide groove, and a wire groove is provided through the side wall of the slide groove toward the outside of the mounting frame, and a connecting wire is provided on the fixed pulley, and the two ends of the connecting wire are respectively fixed on the limiting sliders of the upper roller and the lower roller.

[0015] Preferably, the wire trough is provided with a positioning hole near the outer end, the connecting wire passes through the positioning hole, two positioning holes are provided corresponding to one fixed pulley, and the two positioning holes are respectively provided near the upper roller and the lower roller.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) Through the tension locking structure, when there is tension, the cigarette paper presses the lower roller down and the upper roller is driven upward by the fixed pulley, and the machine operates normally at this time; when the tension disappears, the upper roller falls freely under its gravity and contacts the lower roller, and the cigarette paper at this location will be clamped by the two rollers to prevent it from falling off. In actual production, if there is a sudden paper break, the upper and lower rollers will clamp the cigarette paper at the moment the tension disappears to prevent the elastic contraction of the cigarette paper when the paper breaks. The tension locking structure can effectively deal with the breakage of the cigarette paper in the middle of the process, ensuring the convenience of subsequent maintenance.

[0018] (2) Through the coordination of the tensioning mechanism and the inking roller, when the cigarette paper is installed, it acts on the tensioning mechanism and causes the tensioning mechanism to shift. When the tensioning mechanism shifts, the inking roller moves. During the printing process, the ink in the ink cartridge will flow out smoothly through the ink outlet gap and finally be provided to the printing roller or steel printing roller for printing. The tightening effect of the tensioning mechanism can ensure close contact between the ink cartridge and the inking roller to prevent ink leakage. Through this design, the printing mechanism can effectively achieve accurate ink discharge and improve printing quality and efficiency. If the cigarette paper breaks, the tension disappears, and the inking roller will automatically detach from the ink cartridge and the elastic sealing component will automatically close to prevent the inking roller from continuously absorbing excessive ink during shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the tension locking structure of the present invention.

[0021] Figure 3 is a cross-sectional view of the tension lock structure.

[0022] Figure 4 It is a structural schematic diagram of the tension locking structure in the initial state.

[0023] Figure 5 It is a structural schematic diagram of the tension locking structure when tension exists.

[0024] Figure 6 This is a structural diagram of the tension locking structure from another angle.

[0025] Figure 7 It is a schematic diagram of the installation structure in the third tensioning roller.

[0026] Figure 8 It is a structural diagram of the ink cartridge and the ink roller when they work together.

[0027] Figure 9 yes Figure 8 Schematic diagram of the middle part structure.

[0028] Figure 10 This is a schematic diagram of the internal structure of the ink cartridge.

[0029] Figure 11 This is a schematic diagram of the structure after the ink absorption part is set in the ink cartridge.

[0030] Figure 12 yes Figure 2 Enlarged view at point A.

[0031] In the figure: 1. Frame; 2. Cigarette paper reel; 3. Transfer roller; 4. Tension locking structure; 41. Mounting frame; 42. Upper roller; 43. Fixed pulley; 44. Lower roller; 45. Slide; 46. Elastic structure; 461. Bearing mounting seat; 462. Movable rod; 463. Spring; 5. Tension adjustment structure; 6. Ink roller; 7. Pressing roller; 8. Ink cartridge; 9. Printing roller; 10. Mounting groove; 11. Elastic part; 12. Sealing part; 14. Sealing protrusion; 15. Ink absorbing part; 16. Deformation part; 17. Inclined surface; 18. External connection part; 19. Inner limit part; 20. Mounting hole; 21. Elastic member; 22. Step; 23. Deformation notch. DETAILED DESCRIPTION

[0032] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0035] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0036] Example:

[0037] As shown in the figure, this embodiment proposes a printing device for a cigarette making machine. It primarily comprises a fixed feeding mechanism for the cigarette paper roll, a tensioning mechanism for maintaining the paper tension, and a printing mechanism for printing patterns or text. During printing, the cigarette paper must be kept taut to prevent wrinkles and other printing failures. The feeding mechanism is typically a feeding roller. The cigarette paper is supported and transported by rollers at every stage of printing. Printing is typically performed by a printing roller and a stencil roller. The printing roller transfers the printing pigment or ink to the cigarette paper, while the stencil roller transfers the pattern or text. The selection and adjustment of the rollers is critical to print quality; uniform and stable contact between the rollers and the cigarette paper is crucial. Furthermore, the printing speed and pressure must be controlled to ensure pattern clarity and color uniformity. The entire printing process requires professional operation and coordination to ensure the quality of the printed cigarette paper meets requirements.

[0038] Since cigarette paper needs to be tensioned throughout the printing process, and cigarette paper itself has limited toughness, a tensioning mechanism is required to adjust the tension. However, in practice, paper breakage can occur during printing due to inherent defects or bumps during installation. Since the paper is already taut, a sudden loss of tension causes the paper to shrink and rebound at the break. If the equipment is not shut down promptly, the work area will be cluttered with paper after continued loading. Even if the equipment is shut down promptly, the paper at the printing station can cause difficulty in cleaning. For example, broken paper can become stuck on a rotating roller, hindering the operator's repair efforts and slowing down the return to normal production. In this embodiment, the cigarette paper begins at the paper reel 2, passes through the transfer roller 3, the tension locking mechanism, the tension adjustment mechanism, and finally passes through the printing mechanism for printing and discharge.

[0039] To solve this problem, the tensioning mechanism of this embodiment includes a tension locking structure 4 and a tension adjustment structure 5. The tension locking structure 4 includes an upper roller 42, a lower roller 44 and a connecting portion. The upper roller 42 and the lower roller 44 are located in the same vertical direction for sliding installation, and the upper roller 42 and the lower roller 44 are abutted in the initial state. The connecting portion is suitable for making the lower roller 44 and the upper roller 42 slide in different directions. During normal operation, the cigarette paper is pressed to make the lower roller 44 descend and the upper roller 42 rise at the same time; when the cigarette paper is used up or broken, the tension disappears, the upper roller 42 descends due to gravity, and the lower roller 44 rises at the same time, so that the two automatically abut to clamp the cigarette paper. In this embodiment, a tension locking mechanism 4 is provided, which connects the upper roller 42 and the lower roller 44 via a fixed pulley 43. When tension is applied, the lower roller 44 descends, and the upper roller 42, driven upward by the fixed pulley 43, operates normally. When tension is removed, the upper roller 42 falls freely under its weight, causing the lower roller 44 to rise, bringing the two rollers into contact. The cigarette paper at that location is then clamped between the two rollers, preventing it from falling off. In actual production, if a sudden paper break occurs, the upper and lower rollers 42, 44 clamp the paper at the moment tension is removed, preventing (or at least mitigating) the elastic contraction of the paper during the break.

[0040] In fact, there are two situations in which cigarette paper breaks. The first situation is that the cigarette paper breaks behind the tension locking structure 4 , and the second situation is that the cigarette paper breaks in front of the tension locking structure 4 .

[0041] In the first case, the cigarette paper breaks at the rear and rebounds toward both sides at the break. The cigarette paper at the rear is limited by various rollers in the subsequent printing process, so it will not cause chaos in the working area due to the breakage and rebound of the cigarette paper. The cigarette paper at the front is connected to the cigarette paper reel 2 at the feeding roller. If the machine is not stopped in time, the feeding roller will continue to feed the cigarette paper, which will cause the cigarette paper to pile up in the working area and create a mess, making it difficult to clean up. In this embodiment, when a break occurs, the lower roller 44 and the upper roller 42 automatically abut and clamp the cigarette paper, so that at least the outer end of the cigarette paper is fixed. When sorting, the feeding roller is reversed to rewind the cigarette paper, or the cigarette paper that has been taken off the reel is tightened and loaded into the subsequent process for use.

[0042] In the second case, the cigarette paper breaks in front of the tension locking structure 4. Since the feeding roller may not stop in time, the cigarette paper continues to be fed, and there is no tension or pulling force on the outer end of the cigarette paper. At this time, when the feeding roller rotates, the cigarette paper reel 2 will actually rotate accordingly, that is, the cigarette paper reel 2 and the feeding roller rotate synchronously. Therefore, even if the feeding roller continues to rotate, the wound cigarette paper will no longer continue to separate from the reel, thereby preventing the problem of cigarette paper waste caused by the continued rotation of the feeding roller when the cigarette paper breaks; and the cigarette paper remaining at the rear break will not be confused due to the limitation of various rollers in the subsequent printing process. At this time, maintenance is relatively simple, and the cigarette paper can be reinstalled in order.

[0043] Therefore, in both of the above cases, the tension locking structure 4 can effectively deal with the breakage of cigarette paper during the process, ensuring the convenience of subsequent maintenance.

[0044] In this embodiment, the printing mechanism includes an inking roller 6 and an ink cartridge 8. The ink cartridge 8 includes an ink outlet, and the ink outlet is provided with an elastic sealing component. During installation, the cigarette paper tightens the tensioning mechanism, and the tensioning mechanism is suitable for displacement. When the tensioning mechanism is displaced, it acts on the inking roller 6 to bring the inking roller 6 closer and seal the periphery of the ink outlet, and at the same time squeezes the elastic sealing component to deform the elastic sealing component and open the ink outlet gap. The liquid in the ink cartridge 8 slowly flows out through the ink outlet gap and infiltrates the inking roller 6, and the rotation of the inking roller 6 ensures uniformity. Evenly apply ink. In some embodiments, the ink roller 6 can be used to transfer ink. An ink-distributing roller and a printing roller can be additionally provided. The ink roller 6 transfers the ink to the ink-distributing roller, and the ink-distributing roller transfers the ink to the printing roller, and then the printing operation is performed, thereby ensuring uniform printing. The cigarette paper acts on the tensioning mechanism and shifts the tensioning mechanism. When the tensioning mechanism shifts, the ink roller 6 moves. During the printing process, the ink in the ink cartridge 8 will flow out smoothly through the ink outlet gap and finally be provided to the printing roller or steel printing roller for printing. The tightening effect of the tensioning mechanism can ensure close contact between the ink cartridge 8 and the ink roller 6 to avoid leakage of ink. Through this design, the printing mechanism can effectively achieve accurate ink discharge and improve printing quality and efficiency.

[0045] As for how the tensioning mechanism drives the ink roller 6 to act closely on the elastic sealing component on the ink cartridge 8 when shifting, a specific preferred embodiment is given here: Figure 1As shown, the tensioning mechanism includes three tensioning rollers arranged in a triangular pattern. The cigarette paper passes through the left, bottom, and right tensioning rollers in sequence to maintain tension on the paper. The left tensioning roller is defined as the first tensioning roller, the bottom tensioning roller is the second tensioning roller, and the right tensioning roller is the third tensioning roller. The left and bottom tensioning rollers are fixed, while the right tensioning roller is horizontally movable. This tensioning roller has an elastic structure that moves toward the left. When the cigarette paper acts on the right tensioning roller, it elastically shifts to the right. When the paper tension disappears, the tensioning roller elastically returns to its original position to the left. The right tensioning roller is connected to the inking roller 6 via a connecting rod. When the right tensioning roller moves to the right, the inking roller 6 also moves to the right, causing it to act on the elastic sealing assembly, thereby opening the ink outlet gap and enabling inking of the cigarette paper after installation. Obviously, when it is first used, the inking roller 6 is in a dry state. When the cigarette paper is installed, after the cigarette paper is installed on the tensioning mechanism, it is actually connected to the printing roller and the subsequent discharge roller. When the cigarette paper is installed on the tensioning roller on the right, ink has actually begun to be discharged. As the cigarette paper is installed on the subsequent rollers, the subsequent rollers will drive the inking roller 6 to rotate (or the inking roller 6 can be equipped with a separate drive device to make it rotate at a uniform speed). Therefore, the inking roller 6 will almost complete its uniform inking when the installation is completed, thereby ensuring that the inking roller 6 can stably supply ink after the installation is completed.

[0046] In the above embodiment, it is mentioned that the subsequent roller will drive the inking roller 6 to rotate. As shown in the figure, the printing mechanism in this embodiment includes a pressure roller 7 and a printing roller 9, wherein the printing roller 9 is connected to the inking roller 6. In fact, since the inking roller 6 moves with the tensioning roller on the right, the inking roller 6 and the printing roller 9 are not in contact with each other in the initial state, so the inking roller 6 does not supply ink to the printing roller 9. After the cigarette paper is installed on the tensioning roller on the right, the inking roller 6 moves to the right to be in contact with the ink cartridge 8. At this time, the bottom of the inking roller 6 is in contact with the printing roller 9, and ink transfer begins. There is a space between the printing roller 9 and the pressure roller 7 for the cigarette paper to pass through. When the cigarette paper is installed in this space, as the cigarette paper continues to be installed, the printing roller 9 will be driven by the cigarette paper to rotate (in order to control the printing quality, the printing roller 9 can be provided with a motor with a speed regulation function to control the speed, and the existing technology will not be repeated here), thereby causing the inking roller 6 to rotate as well. The advantage brought at this time is that the inking roller 6 and the printing roller 9 do not interact with each other before the cigarette paper is installed, so the inking of the printing roller 9 is equivalent to being delayed. When the cigarette paper is initially installed, the printing roller 9 can start printing on the cigarette paper slightly later. Before the cigarette paper is installed in place, the loss of cigarette paper can be reduced, because before it is installed in place, the printing roller 9 has not been evenly inked, and therefore the printing quality cannot be guaranteed.

[0047] like Figure 7 As shown, for the tensioning roller on the right side (the tensioning roller on the right side is the third tensioning roller), a mounting groove 10 is opened on the frame 1, and the mounting groove 10 is a long groove type, and its bottom also has a long groove with a slightly larger inner diameter. The tensioning roller has a mounting portion, and its mounting portion includes an external portion 18, an internal limiting portion 19 and an elastic member 21. Obviously, the external portion 18 is consistent with the width of the mounting groove 10, and the internal limiting portion 19 cooperates with the long groove with a slightly larger inner diameter at the bottom. A mounting hole 20 is provided on the external portion, and the tensioning roller is fixedly installed through the mounting hole, and the elastic member 21 is arranged between the side walls of the mounting groove 10 and the external portion 18, so that the tensioning roller is located on the left side of the mounting groove 10 in the initial state, that is, it has a tendency to move away from the side of the inking roller 6.

[0048] It can be seen that only when the tensioning mechanism has sufficient tension can the tensioning mechanism act on the ink roller 6, causing the elastic sealing component to deform and open the ink outlet gap. The ink roller 6 will rotate during operation, so the ink roller 6 will also homogenize the ink in the ink cartridge 8, thereby ensuring that the ink will not be stratified or uneven in color. The existing ink roller 6 is generally partially placed in the ink cartridge 8 for inking. Although the operation is simple, this inking method obviously makes it difficult to control the amount of ink. If the ink roller 6 absorbs a large amount of ink, if it is not consumed in time during printing, it may even cause the ink to overflow and drip into the working environment. However, in this embodiment, when the tensioning mechanism is not tensioned, that is, when it is not in operation or when the operation is interrupted, the ink roller 6 will automatically leave the ink cartridge 8, thereby preventing the occurrence of the above-mentioned problems.

[0049] It can be foreseen that in this embodiment, when printing is not in progress, the inking roller 6 is not in contact with the ink in the ink cartridge 8. After the machine is turned on, the inking roller 6 will only approach the elastic sealing component and open the ink outlet gap when the cigarette paper is normally tensioned. The ink outlet gap is obviously a gap, and its ink outlet speed is relatively low. Combined with the rotation of the inking roller 6, the purpose of uniform inking can be achieved, and the amount of inking can be controlled to a certain extent. At the same time, the inking roller 6 also homogenizes the ink, so that the ink in the ink cartridge 8 is uniform, ensuring the printing quality. In the event of paper breakage, the inking roller 6 will automatically detach from the ink cartridge 8. At this time, the elastic sealing component is automatically closed to prevent the inking roller 6 from continuously absorbing too much ink when the machine is shut down.

[0050] Since the upper roller 42 and the lower roller 44 connected by the fixed pulley 43 are in the upper and lower positions, when the tension disappears, the lower roller 44 falls freely. At this time, it is limited by the length of the connecting line on the fixed pulley 43. In this embodiment, the tension locking structure 4 also includes an elastic structure 46 for resetting the lower roller 44. The elastic structure 46 is fixedly connected to the lower roller 44. After installation, the lower roller 44 is initially located at the top of the elastic structure 46. At the same time, the upper roller 42 falls freely and abuts against the lower roller 44. At this time, the position of the lower roller 44 at the top of the elastic structure 46 and the position of the upper roller 42 are the first set position; after the cigarette paper is installed, the cigarette paper presses the lower roller 44 downward. When the lower roller 44 moves downward, the upper roller 42 moves up through the fixed pulley 43 to cancel the abutment between the two. At this time, the positions of the upper roller 42 and the lower roller 44 are the second set position. Therefore, due to the provision of the elastic structure 46, the upper roller 42 is initially positioned at the first set position. At this time, although the lower roller 44 and the upper roller 42 are connected by a connecting line, the connecting line may not be straightened or is just about to be straightened. The advantage of this is that the fixed pulley 43 can still meet its set function even when using a shorter connecting line. Due to the positional relationship between the upper roller 42 and the lower roller 44, it is difficult for the fixed pulley 43 to ensure that the connecting line is always in a taut state. Therefore, in order to achieve the effect of separating the two when tension is applied and approaching and abutting them when tension is eliminated, the function of the elastic structure 46 is to prevent the lower roller 44 from freely falling, which would prevent the upper roller 42 from abutting against the lower roller 44. When the cigarette paper presses down on the lower roller 44, the movement of the lower roller 44 will tighten the connecting line and cause the upper roller 42 to move upward.

[0051] As a preferred embodiment, the elastic structure 46 includes a spring 463, a bearing mounting seat 461 and a movable rod 462 for limiting in the vertical direction; the top end of the movable rod 462 is fixedly connected to the lower roller 44 through the bearing mounting seat 461, so that in the initial state, the lower roller 44 is maintained at the height of the first set position due to the support of the movable rod 462 and the spring 463. Figure 4 In addition to allowing the upper roller 42 and the lower roller 44 to abut against each other better, this arrangement has another advantage in that it can bring the two into contact faster than simply lowering the upper roller 42, because the elastic structure 46 causes the lower roller 44 to rebound when the tension disappears, while the upper roller 42 falls freely. The combination of the two can achieve clamping of the cigarette paper in a very short time.

[0052] A preferred embodiment of the elastic closure assembly is proposed, such as Figures 8 to 11The elastic sealing component includes a sealing portion 12 for sealing and an elastic portion 11 for supporting the sealing portion 12. The ink cartridge 8 is provided with an ink outlet notch on one side close to the tensioning mechanism. The top of the sealing portion 12 is hingedly mounted on the top of the inner wall of the ink outlet notch. The elastic portion 11 is adapted to make the bottom of the sealing portion 12 close to and seal the ink outlet notch. When the inking roller 6 moves to the installation position, the inking roller 6 is adapted to squeeze the sealing portion 12 so that the sealing portion 12 rotates around the hinged position and, at the same time, compress the elastic portion 11 so that an ink outlet gap is formed between the sealing portion 12 and the notch. Obviously, due to the abutment of the inking roller 6, the ink outlet gap formed by the sealing portion 12 is wider at the bottom when it rotates, and the width increases in sequence upwards. The ink outlet gap is reduced to form a tapered ink outlet gap. In order to further reduce the opening size of the ink outlet gap, a sealing protrusion 14 that fits tightly with the sealing part 12 is provided on the inner wall of the ink outlet gap. The inner wall of the sealing protrusion 14 has a slope 17. When the sealing part 12 rotates, it fits and seals with the slope 17 to reduce the opening area of the formed ink outlet gap. One function of the sealing protrusion 14 is to ensure a good sealing effect. The other function is that as the sealing part 12 rotates in a hinged manner, the ink outlet gap of the sealing part 12 becomes narrower when it is opened and closed. Because the slope 17 on the sealing protrusion 14 fills part of the width of the bottom of the ink outlet gap, the ink outlet amount can be better controlled.

[0053] In the above embodiment, the best position of the inking roller 6 is to be located in the middle of the side of the ink cartridge 8 for abutment. If the inking roller 6 is to open the elastic sealing component to form an ink outlet gap, it must have a certain stroke. Such a design can facilitate the earliest contact between the outer end of the inking roller 6 and the ink cartridge 8. Being set in the middle of the ink cartridge 8 can also allow the inking roller 6 to have better contact with the liquid in the ink cartridge 8, so that the inking roller 6 can better stir the liquid in the ink cartridge 8 evenly when it rotates.

[0054] Furthermore, an ink outlet is first opened in the middle of the side of the ink cartridge 8. The outer contour of the ink outlet is arc-shaped, and its curvature is the same as that of the inking roller 6. The inner side of the ink outlet is transitioned into an approximately rectangular surface through a cone. The sealing portion 12 of the elastic closing component acts on the inner side of the rectangular surface. When the inking roller 6 approaches, the sealing portion 12 is squeezed to form an ink outlet gap between the rectangular surface and the sealing portion 12.

[0055] Obviously, when the inking roller 6 is positioned in the middle of the side of the corresponding ink cartridge 8 to abut against and apply ink, a problem arises: there is a height difference between the bottom of the inking roller 6 and the bottom of the ink cartridge 8. This height difference prevents the inking roller 6 from continuing to absorb ink when the liquid in the ink cartridge 8 is almost empty. To address this problem, the ink cartridge 8 is further provided with an ink absorbing portion 15. The ink absorbing portion 15 is positioned at the bottom of the inner cavity of the ink cartridge 8, near the side of the tensioning mechanism. The minimum setting value of the top height of the ink absorbing portion 15 is the lowest height of the ink outlet gap, and the side of the ink absorbing portion 15 located at the inner cavity of the ink cartridge 8, near the tensioning mechanism, is the highest side of the ink absorbing portion 15. With this arrangement, even if the liquid in the ink cartridge 8 is empty, the ink absorbing portion 15 can still continuously supply ink to the inking roller 6. The ink absorbing portion 15 is made of a material with good water absorption, such as a sponge structure.

[0056] On the basis of the above embodiment, since the ordinary sponge has poor water barrier after being compressed, when the sealing part 12 is closed, there may still be ink leakage through the ink absorbing part 15. To solve this problem, a simple method is to control the amount of ink below the ink outlet gap after printing is completed. However, such an operation is undoubtedly more troublesome for the operator. To solve this problem, Figure 10 As shown, in this embodiment, a deformation notch 23 is provided in the middle of the bottom of the sealing protrusion 14, and correspondingly, the top of the ink absorbing portion 15 also includes a deformation portion 16, the width of the deformation portion 16 is less than or equal to the width of the deformation notch 23, and the shape of the deformation portion 16 can be a simple rectangular parallelepiped. In the initial state, the inking roller 6 does not contact the ink cartridge 8. At this time, the sealing portion 12 is close to the inclined surface 17. Correspondingly, the bottom of the sealing portion 12 will squeeze and narrow the deformation portion 16 and completely accommodate it in the range of the deformation notch 23. At the same time, the deformation is tight so that the sealing portion 12 will not leak through the ink absorbing portion 15 after it is closed. The ink absorbing portion 15 here can be made of, for example, silicone sponge structure, which can obtain better sealing performance when pressed, thereby ensuring that it is not easy to leak in the initial state.

[0057] As shown in the figure, the tension locking structure 4 also includes a mounting frame 41. The upper roller 42, the lower roller 44 and the elastic structure 46 are all installed in the mounting frame 41. There are two fixed pulleys 43. The two fixed pulleys 43 are respectively fixed on both sides of the upper roller 42 and the lower roller 44. A slide 45 for the upper roller 42 and the lower roller 44 to move up and down is provided on the wall surface of the mounting frame 41. Both ends of the upper roller 42 and the lower roller 44 are provided with a limiting slider to limit sliding in the slide 45. A wire groove is provided through the side wall of the slide 45 toward the outside of the mounting frame 41. A connecting wire is provided on the fixed pulley 43. The connecting wire The two ends of are respectively fixed on the limit sliders of the upper roller 42 and the lower roller 44; the wire groove is provided with a positioning hole near the outer end, and the connecting wire passes through the positioning hole. There are two positioning holes corresponding to one fixed pulley 43, and the two positioning holes are respectively set close to the upper roller 42 and the lower roller 44. Through the setting of the positioning holes, the connection line has the restriction of the positioning holes to prevent the connection line from shrinking arbitrarily when it is not tightened, so as to prevent the connection line from being stuck. At the same time, the positioning holes can also limit the movement stroke of the upper roller 42 to a certain extent, ensuring stable operation in both the presence and disappearance of tension. Setting the fixed pulley 43 and the upper roller 42 and the lower roller 44 in the above manner is a preferred embodiment, and in fact, other installation methods can also be used.

[0058] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A cigarette making machine printing device, characterized in that, It includes a fixed feeding mechanism for cigarette paper rolls, a tensioning mechanism for tightening the cigarette paper, and a printing mechanism for printing patterns or texts. The tensioning mechanism includes a tension locking structure and a tension adjusting structure, the tension locking structure includes an upper roller, a lower roller and a connecting portion, the upper roller and the lower roller are slidably installed in the same vertical direction, and the upper roller and the lower roller are abutted in an initial state, the connecting portion is suitable for making the lower roller and the upper roller slide in different directions, during normal operation, the cigarette paper is pressed to cause the lower roller to descend and the upper roller to ascend at the same time; when the cigarette paper is used up or broken, the tension disappears, the upper roller descends due to gravity, and the lower roller ascends at the same time, so that the two automatically abut to clamp the cigarette paper; The printing mechanism includes an inking roller and an ink cartridge. The ink cartridge includes an ink outlet. The ink outlet is provided with an elastic sealing component. During installation, the cigarette paper tightens the tensioning mechanism, and the tensioning mechanism is suitable for displacement. When the tensioning mechanism is displaced, it acts on the inking roller, causing the inking roller to approach and seal the periphery of the ink outlet, while squeezing the elastic sealing component to deform the elastic sealing component and open the ink outlet gap. The liquid in the ink cartridge slowly flows out through the ink outlet gap and soaks the inking roller, and is evenly inked by the rotation of the inking roller.

2. The cigarette making machine printing device according to claim 1, characterized in that: The connecting portion is configured as a fixed pulley structure, the upper roller and the lower roller are connected by a connecting line that goes around the fixed pulley structure, the tension locking structure also includes an elastic structure for resetting the lower roller, the elastic structure is fixedly connected to the lower roller, and after installation, the lower roller is initially located at the top of the elastic structure, while the upper roller falls freely and abuts against the lower roller; after the cigarette paper is installed, the cigarette paper presses the lower roller downward, and when the lower roller moves downward, the upper roller is moved upward by the fixed pulley structure to cancel the abutment between the two.

3. The cigarette making machine printing device according to claim 2, characterized in that: The elastic structure includes a spring, a bearing mounting seat and a movable rod for limiting in the vertical direction; the top end of the movable rod is fixedly connected to the lower roller by arranging the bearing mounting seat.

4. The cigarette making machine printing device according to claim 1, characterized in that: The elastic sealing component includes a sealing portion for sealing and an elastic portion for supporting the sealing portion. The ink cartridge is provided with an ink outlet gap on a side close to the tensioning mechanism. The top of the sealing portion is hingedly mounted on the top of the inner wall of the ink outlet gap. The elastic portion is suitable for making the bottom of the sealing portion close to and seal the ink outlet gap. When the ink supply roller moves to the installation position, the ink supply roller is suitable for squeezing the sealing portion to rotate the sealing portion around the hinged position and compressing the elastic portion at the same time to form the ink outlet gap between the sealing portion and the ink outlet gap.

5. The cigarette making machine printing device according to claim 4, characterized in that: The inner wall of the ink outlet gap is provided with a sealing protrusion that fits tightly with the sealing part. The inner wall of the sealing protrusion has a slope. When the sealing part rotates, it fits and seals with the slope to reduce the opening area of the ink outlet gap formed. When the ink supply roller is in contact, it is arranged in the middle of the side of the ink cartridge.

6. The cigarette making machine printing device according to claim 1, characterized in that: The tensioning adjustment structure includes a first tensioning roller, a second tensioning roller and a third tensioning roller distributed in a triangular shape. The cigarette paper passes through the three rollers in sequence to ensure the tension of the cigarette paper. The first tensioning roller and the second tensioning roller are fixed, and the third tensioning roller closest to the inking roller is slidably set in the horizontal direction and is provided with an elastic structure. The elastic structure makes the third tensioning roller have a tendency to move away from the side of the inking roller. When the cigarette paper acts on the third tensioning roller, the third tensioning roller is elastically displaced close to the side of the inking roller. After the tension disappears, the third tensioning roller elastically returns to its original position; the third tensioning roller is connected to the inking roller by a connecting rod. When the third tensioning roller moves toward the side of the ink cartridge, the inking roller correspondingly approaches and finally acts on the elastic sealing component, thereby opening the ink outlet gap.

7. The cigarette making machine printing device according to claim 5, characterized in that: The ink cartridge is also provided with an ink absorption part, which is arranged on the side of the bottom of the ink cartridge inner cavity close to the tensioning mechanism. The minimum setting value of the top height of the ink absorption part is the lowest height of the ink outlet gap, and the side of the ink absorption part located in the ink cartridge inner cavity close to the tensioning mechanism is the highest side of the ink absorption part.

8. The cigarette making machine printing device according to claim 7, characterized in that: A deformation notch is provided in the middle of the bottom of the sealing protrusion, and correspondingly, the top of the ink absorbing part includes a deformation part, the width of the deformation part is less than or equal to the width of the deformation notch. In the initial state, the ink supply roller does not contact the ink cartridge. At this time, the sealing part is close to the inclined surface, and correspondingly, the bottom of the sealing part will squeeze and narrow the deformation part and completely accommodate it within the range of the deformation notch.

9. The cigarette making machine printing device according to claim 2, characterized in that: The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket.

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