Non-stop continuous unwinding device for printing equipment

Abstract

The invention discloses a non-stop continuous unwinding device for printing equipment, and belongs to the technical field of unwinding devices, the non-stop continuous unwinding device comprises a rack, two unwinding rollers, a feeding set and a storage set, and the feeding set is located between the two unwinding rollers; the feeding set comprises a center roller, the end of the center roller is sleeved with a reset torsion spring, one end of the reset torsion spring is fixedly connected with the center roller, the other end of the reset torsion spring is fixedly connected with the rack, mounting supports are arranged at the two ends of the center roller, and a first guide roller and a second guide roller are movably connected between the two mounting supports. Two lead-in rollers are arranged on one side, far away from the second guide roller, of the first guide roller; a first cutting structure is arranged between the first guide roller and the leading-in roller, and a second cutting structure is arranged on the side, away from the first guide roller, of the second guide roller; the material storage group is provided with a plurality of material storage rollers which are sequentially arranged up and down in a staggered manner; according to the invention, the non-stop and continuous unreeling of the printing equipment can be realized in the roll changing process of the printing coiled material.

Description

Technical Field

[0001] The present invention relates to the technical field of unwinding devices, and particularly relates to a continuous unwinding device for a printing device without stopping the machine. Background Art

[0002] During the printing operation of a printing device, it is necessary to continuously unwind a roll-shaped material and transport it into the printing device for printing. However, the length of the roll-shaped material is limited. When the roll-shaped material is about to be consumed, the remaining material loses the fixation of the core, resulting in a sudden drop in the material tension, which easily leads to a decrease in printing quality. As a result, the printing device has to stop the machine to replace the roll-shaped material. The time wasted during the replacement process of the roll-shaped material will reduce the printing efficiency of the printing device, and more waste materials will be cut off during this process, causing waste of resources.

[0003] Based on the above situation, Chinese Patent No. CN221970783U with the publication (announcement) number discloses a unwinding device for a printing machine, which includes an unwinder, a loading mechanism, and a pushing mechanism. The unwinder includes a machine body, a rotating shaft connected to the machine body, and a winding disc. The loading mechanism includes a vehicle body moving along the axis direction of the rotating shaft, a lifting member provided on the vehicle body, and a support plate connected to the lifting member. The support plate is driven by the lifting member to move up and down, so that the perforation of the winding disc placed on the support plate corresponds to the rotating shaft. The pushing mechanism includes a driving member provided above the unwinder and a baffle connected to the driving member. The baffle is sleeved on the rotating shaft, and the driving member is used to drive the baffle to move along the axis direction of the rotating shaft.

[0004] The above patent document discloses a unwinding device for a printing machine. The unwinding device fixes a roll-shaped material such as printing paper through a winding disc. During the installation of the printing paper, the winding disc fixed with the printing paper is placed on the support plate, and the height of the winding disc is adjusted by lifting to enable the winding disc to be quickly slidably connected to the rotating shaft. This unwinding device improves the installation and fixation efficiency of roll-shaped materials such as printing paper and can reduce the time consumed by the printing device during the roll change process. However, this unwinding device cannot achieve non-stop operation of the printing device during the roll change process, and there is still room for improvement in the working efficiency of the printing device. Therefore, this unwinding device still has room for improvement. Summary of the Invention

[0005] In view of the technical defects in the background art, the present invention proposes a continuous unwinding device for a printing device without stopping the machine, which solves the above technical problems and meets the actual needs. The specific technical solutions are as follows: A continuous unwinding device for a printing device without stopping the machine includes a frame, unwinding rollers, a feeding group, and a material storage group. There are two unwinding rollers, and both ends are movably connected to the frame. The feeding group is located between the two unwinding rollers; The feeding group includes the following structures: a center roller, which extends in the front-rear direction and its ends are movably connected to the frame. A return torsion spring is sleeved on the end of the center roller. One end of the return torsion spring is fixedly connected to the center roller and the other end is fixedly connected to the frame. Mounting brackets are provided at both ends of the center roller. A first guide roller and a second guide roller are movably connected between the two mounting brackets. The distance between the first guide roller and the center roller is greater than the distance between the second guide roller and the center roller. An introducing roller is provided on the side of the first guide roller away from the second guide roller. There are two introducing rollers and a material clamping groove is formed between the two introducing rollers; A first material cutting structure is provided between the first guide roller and the introducing roller, and a second material cutting structure is provided on the side of the second guide roller away from the first guide roller; There are two sets of the feeding groups, and the two sets of feeding groups are mirror-symmetrical in the left-right direction. The two sets of feeding groups are respectively matched with two unwinding rollers one by one. The storage group is arranged above the two sets of feeding groups. The storage group is provided with a number of storage rollers arranged in a staggered manner up and down in sequence. The ends of the storage rollers are movably connected to the frame.

[0006] As a further technical solution of the present invention, the first material cutting structure includes the following structures: a material cutting slide rail, which extends in the front-rear direction and a matching material cutting slider is mounted on one side. A material cutting knife extending away from the center roller is provided on one side of the material cutting slider. Knife edges are provided on both the front and rear sides of the material cutting knife.

[0007] As a further technical solution of the present invention, the first material cutting structure further includes the following structures: a material cutting frame, the two ends of which are respectively fixedly connected to the two mounting brackets. The inside of the material cutting frame is hollow and forms a cutting knife cavity. The cutting knife cavity wraps the material cutting slide rail, the material cutting slider and the material cutting knife inside. A material cutting groove matching the material cutting knife is opened on one side of the material cutting frame. The material cutting knife extends outward along the material cutting groove in the cutting knife cavity. Both the front and rear ends of the material cutting slide rail are bent by up to 90° to form bending parts; The structure of the second material cutting structure is the same as that of the first material cutting structure.

[0008] As a further technical solution of the present invention, a clamping plate is provided on the side of the second material cutting structure away from the second guide roller. Return tension springs are provided at both the front and rear ends of the clamping plate, and the ends of the return tension springs are fixedly connected to the material cutting frame.

[0009] As a further technical solution of the present invention, center shafts are provided at both the front and rear ends of the center roller, and the return torsion spring is sleeved on the surface of the center shaft; A return sleeve which is hollow inside and matches the return torsion spring is provided on one side of the frame. The return sleeve wraps the return torsion spring and the center shaft together inside. One end of the return torsion spring is fixedly connected to the inner wall of the return sleeve and the other end is fixedly connected to one side of the center shaft.

[0010] As a further technical solution of the present invention, the storage group includes two storage roller groups arranged left and right and composed of a number of storage rollers. The storage rollers in the storage roller groups are distributed in sequence in the up and down direction, and the projections formed by the storage rollers between the two storage roller groups in the left and right direction are arranged staggeredly.

[0011] As a further technical solution of the present invention, the ends of the storage rollers in any one of the storage roller groups are all movably connected together with a connecting plate. A damping telescopic rod is provided between the two connecting plates. A storage slider is provided on one side of one of the connecting plates close to the frame, and a chute matching the storage slider is provided on one side of the frame.

[0012] As a further technical solution of the present invention, an adjusting roller extending in the front and rear direction is provided between the lower part of the storage group and the feeding group. There are two adjusting rollers arranged left and right, and a material through groove is formed between the two adjusting rollers.

[0013] The beneficial effects of the present invention are as follows: The present invention discloses a printing coil unwinding device capable of realizing coil changing without stopping the machine. The unwinding device can install and fix two rolls of printing coils through two unwinding rollers. When one roll of printing coil is completely unwound, its end is clamped in the material clamping groove through a fixing rod. The printing paper will drive the central roller of the feeding group to rotate, so that the printing papers of the two rolls of printing coils are connected end to end. Subsequently, the redundant parts at the ends of the two rolls of printing coils are respectively cut by the first cutting structure and the second cutting structure, and the coil changing operation with material connection is completed. During the coil changing operation with material connection, the cached printing paper is released through the storage group at the same time to enable the printing equipment to continuously print, thereby realizing that the printing equipment does not stop during the coil changing process of the printing coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a non-stop continuous unwinding device for a printing equipment in the unwinding state.

[0015] Figure 2 is a schematic structural diagram of a non-stop continuous unwinding device for a printing equipment in the coil changing state.

[0016] Figure 3 is a front view of a non-stop continuous unwinding device for a printing equipment in the unwinding state.

[0017] Figure 4 is a front view of a non-stop continuous unwinding device for a printing equipment in the coil changing state.

[0018] Figure 5 is Figure 4 a partial schematic diagram at A in

[0019] Figure 6 It is a schematic structural diagram of a center roller of a continuous unwinding device for a printing equipment without stopping the machine.

[0020] Figure 7 It is a schematic structural diagram of a stock storage group of a continuous unwinding device for a printing equipment without stopping the machine.

[0021] Figure 8 It is a sectional view of a first cutting structure of a continuous unwinding device for a printing equipment without stopping the machine Figure 1 .

[0022] Figure 9 It is a sectional view of a first cutting structure of a continuous unwinding device for a printing equipment without stopping the machine Figure 2 .

[0023] Figure 10 It is a sectional view of a second cutting structure of a continuous unwinding device for a printing equipment without stopping the machine.

[0024] Wherein: 1-frame, 11-reset sleeve, 12-chute, 2-unwinding roller, 3-feeding group, 31-center roller, 32-reset torsion spring, 33-mounting bracket, 34-first guiding roller, 35-second guiding roller, 36-introducing roller, 37-center shaft rod, 4-stock storage group, 41-stock storage roller, 42-connecting plate, 43-damping telescopic rod, 44-stock storage slider, 5a-first cutting structure, 5b-second cutting structure, 51-cutting slide rail, 52-cutting slider, 53-cutting knife, 54-cutting frame, 55-cutting groove, 56-bending part, 6-clamping plate, 61-reset tension spring, 7-adjusting roller, 8a-first coil, 8b-second coil. Specific embodiments

[0025] The following will describe the embodiments of the present invention in conjunction with relevant drawings and embodiments. The embodiments of the present invention are not limited to the following embodiments, and the relevant necessary components involved in the present invention should be regarded as well-known technologies in the technical field, which can be known and mastered by those skilled in the technical field.

[0026] Referring to Figure 1 、 Figure 2 , a continuous unwinding device for a printing equipment without stopping the machine includes a frame 1, an unwinding roller 2, a feeding group 3, and a stock storage group 4. There are two unwinding rollers 2 and both ends are movably connected to the frame 1. The feeding group 3 is located between the two unwinding rollers 2; The feeding group 3 includes the following structure: a central roller 31, which extends in the front-back direction and whose ends are movably connected to the frame 1. A reset torsion spring 32 is sleeved on the ends of the central roller 31. One end of the reset torsion spring 32 is fixedly connected to the central roller 31, and the other end is fixedly connected to the frame 1. Mounting brackets 33 are provided at both ends of the central roller 31. A first guide roller 34 and a second guide roller 35 are movably connected between the two mounting brackets 33. The distance between the first guide roller 34 and the central roller 31 is greater than the distance between the second guide roller 35 and the central roller 31. An introducing roller 36 is provided on the side of the first guide roller 34 away from the second guide roller 35. There are two introducing rollers 36, and a material clamping groove is formed between the two introducing rollers 36; A first cutting structure 5a is provided between the first guide roller 34 and the introducing roller 36, and a second cutting structure 5b is provided on the side of the second guide roller 35 away from the first guide roller 34; There are two sets of feeding groups 3, and the two sets of feeding groups 3 are mirror-symmetrical in the left-right direction. The two sets of feeding groups 3 are respectively matched with the two unwinding rollers 2 one by one. The storage group 4 is arranged above the two sets of feeding groups 3. The storage group 4 is provided with a number of storage rollers 41 arranged in a staggered manner in the up-down direction. The ends of the storage rollers 41 are movably connected to the frame 1.

[0027] The unwinding device of the present invention is mainly used to unwind printing materials such as printing paper and convey them into a printing device for printing, and can achieve non-stop operation during the process of changing the rolls of the printing material. In this unwinding device, the frame 1 serves as a fixed structural framework on the surface, which is used to fix structures such as the unwinding roller 2, the feeding group 3, and the storage group 4. The unwinding roller 2 is used to install and fix the printing material. The printing material usually has a cylindrical core at the center position. After the core is sleeved on the surface of the unwinding roller 2, tools such as flanges and fixing bolts are used to fix the printing material. A bearing is sleeved at the connection position between the end of the unwinding roller 2 and the frame 1 to achieve the movable connection between the unwinding roller 2 and the frame 1 and enable the unwinding roller 2 to gradually release the printing paper by rotating. The unwound printing paper is sequentially conveyed to the printing device through the feeding group 3 and the storage group 4 for printing.

[0028] The feeding group 3 of the present invention is mainly used to guide the printing paper into the stockpiling group 4, and during the process of changing the roll after a roll of printing material is used up, the feeding group 3 can assist the present invention to achieve a roll-changing operation without stopping the machine. After the printing paper is unrolled from the printing material, it first passes through the material clamping groove between the two introducing rollers 36, and then successively winds around the outer sides of the first guiding roller 34 and the second guiding roller 35, and then enters the stockpiling group 4. After passing through the stockpiling group 4, the printing paper finally enters the printing equipment for printing; the unrolling device can install and fix two rolls of printing materials through the two unrolling rollers 2, and the two rolls of printing materials unroll the printing paper into the two feeding groups 3 respectively. One of the feeding groups 3 guides the printing paper to pass through the stockpiling group 4 for printing, and the other feeding group 3 fixes the printing material to be replaced. When the printing paper being printed is unrolled completely, the end of the printing paper is cut by the first cutting structure 5a of the corresponding feeding group 3 and then bonded and fixed to the head end of the printing paper to be replaced. The head end of the printing paper to be replaced is cut off the redundant part by the second cutting structure 5b of the corresponding feeding group 3 to complete the material connection of the printing paper, thus realizing the roll-changing operation of the printing material.

[0029] In order to achieve the roll-changing operation without stopping the machine for the printing material, it should be noted that during the winding process of the printing material after production, a fixing rod with an outer diameter larger than the width of the material clamping groove needs to be fixed at one end of the printing paper close to the roll core. After fixing the printing material to be replaced on the unrolling roller 2, after the printing paper of the printing material winds around the corresponding feeding group 3, the head end of the printing paper needs to be fixed on one side of the second cutting structure 5b in the corresponding feeding group 3 by tools such as fixing bolts, and double-sided tape needs to be adhered to the outer side of the printing paper wound around the second guiding roller 35, so as to complete the preparation operation of the printing material to be replaced. At the same time, both the first cutting structure 5a and the second cutting structure 5b can adopt common printing paper cutting knives; the printing material that is being unrolled and printed is set as the first roll 8a, the feeding group 3 that cooperates with the first roll 8a is set as the first feeding group, the printing material to be replaced is set as the second roll 8b, and the feeding group 3 that cooperates with the second roll 8b is set as the second feeding group; The principle of the present invention to achieve the roll-changing operation without stopping the machine for the printing material: Refer to Figure 1 、 Figure 3 , at this time, the unrolling device is in the unrolling state. When the printing paper in the first roll 8a is unrolled completely, refer to Figure 2 、 Figure 4 、 Figure 5, at this time, the unwinding device is in the roll-changing state. Based on the first feeding group, the fixing rod at the end of the printing paper will be stuck in the material clamping groove. The printing equipment will continue to collect the printing paper, which will generate a pulling force on the introduction roller 36 through the printing paper and cause the central roller 31 to rotate. The rotation direction of the central roller 31 is the direction from the first guiding roller 34 towards the second guiding roller 35. When the central roller 31 drives the first guiding roller 34 to rotate through the mounting bracket 33 until the top of the first guiding roller 34 comes into contact with the second guiding roller 35 of the second feeding group, that is, the end of the printing paper in the first roll of material 8a contacts the head of the printing paper in the second roll of material 8b. After the head and end of the two rolls of printing paper are in contact, they are bonded together with double-sided tape. Then, the end of the printing paper in the first roll of material 8a is cut off by the first cutting structure 5a in the first feeding group. At the same time, the position where the head of the printing paper in the second roll of material 8b is fixed on one side of the second cutting structure 5b in the second feeding group is cut off by the second cutting structure 5b, so that the printing paper in the second roll of material 8b is separated from the second cutting structure 5b. After the cutting is completed, the two rolls of printing materials are completed with the head-to-tail material connection. Refer to Figure 6 , under the action of the reset torsion spring 32, the central roller 31 in the first feeding structure is reset, and the second roll of material 8b guides the printing paper into the storage group 4 through the second feeding structure and then enters the printing equipment for printing operations.

[0030] Further, refer to 1, Figure 2 , Figure 3 , Figure 4 , Figure 7 , during the process of changing the roll without stopping the machine, the printing equipment is still continuously printing and requires the printing paper to be continuously conveyed into the printing equipment. The storage group 4 can ensure that there is still printing paper conveyed into the printing equipment during the roll-changing process by caching a certain length of printing paper; the storage group 4 of the present invention includes two storage roller groups arranged left and right and composed of several storage rollers 41. The storage rollers 41 in the storage roller group are arranged in sequence in the up and down direction. The projections formed by the storage rollers 41 between the two storage roller groups in the left and right direction are staggered; the ends of the storage rollers 41 in any one storage roller group are commonly movably connected with a connecting plate 42. A damping telescopic rod 43 is provided between the two connecting plates 42. A storage slider 44 is provided on one side of one of the connecting plates 42 close to the frame 1. A chute 12 matching the storage slider 44 is provided on one side of the frame 1; After the stock storage group 4 adopts the above structure, it should be noted that the printing paper leaves the feeding group 3 and thus winds around the outside of several stock storage rollers 41 in the stock storage group 4. Specifically, the two groups of stock storage roller groups are respectively set as the first roller group and the second roller group. The winding sequence of the printing paper is successively the first stock storage roller 41 in the first roller group, the first stock storage roller 41 in the second roller group, the second stock storage roller 41 in the first roller group, the second stock storage roller 41 in the second roller group, and so on. In this way, the stock storage group 4 can cache printing paper with a longer length. When the printing paper in the printing roll is completely unwound, the fixing rod at the end of the printing paper is stuck in the material clamping groove, increasing the tension of the printing paper. One of the stock storage roller groups moves along the chute 12 towards the other stock storage roller group through the stock storage slider 44 on one side of the connecting plate 42. As a result, the printing paper cached in the stock storage group 4 is gradually conveyed into the printing equipment, ensuring that the printing equipment continues to print. During the process of the stock storage group 4 releasing the cached printing paper, the two feeding groups 3 simultaneously perform the roll change of the printing roll, thus realizing the operation of changing the roll without stopping the machine.

[0031] Furthermore, the damping telescopic rod 43 is preferably an electromagnetic damping rod. When the printing roll is completely unwound and the tension of the printing paper increases, one of the stock storage roller groups moves towards the other stock storage roller group. At the same time, the movable rod of the damping telescopic rod 43 gradually retracts into the sleeve. After the roll change is completed, the new printing roll can continuously unwind the printing paper, reducing the tension of the printing paper. The movable rod of the damping telescopic rod 43 will gradually extend out of the sleeve, causing the stock storage roller group to reset and re-cache the printing paper. Moreover, the damping telescopic rod 43 can stabilize the tension of the printing paper through the telescopic movement of the movable rod when the tension of the printing paper changes.

[0032] It should be further noted that the unwinding device of the present invention is connected to the power supply line through wires and provides electrical energy for the operation of each component in the unwinding device. A control system for controlling the operation of each component is provided in the unwinding device. This control system is controlled based on the operation logic of the unwinding device. The control system is set based on the control principles of common mechanical equipment at present, which belongs to the application of existing technologies. The specific structure and principle of the control system will not be elaborated here. When the printing roll is completely unwound, the central roller 31 of the feeding group 3 will rotate when the tension of the printing paper increases. When the central roller 31 rotates to the limit, an infrared emitter and an infrared receiver can be arranged inside the frame 1 at a position relative to the second guide roller 35 at this time. When the infrared receiver cannot receive the infrared ray, that is, the infrared ray is blocked by the second guide roller 35, the control system can determine that the printing roll has been completely unwound and can then execute the subsequent roll change operation.

[0033] As one of the preferred embodiments of the present invention, refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 、Figure 9 , Figure 10 , the first cutting structure 5a includes the following structures: a cutting slide rail 51, which extends in the front-rear direction and has a matching cutting slide block 52 mounted on one side. On one side of the cutting slide block 52, there is a cutting knife 53 extending away from the center roller 31. Both the front and rear sides of the cutting knife 53 are provided with cutting edges. The first cutting structure 5a further includes the following structures: a cutting frame 54, the two ends of which are respectively fixedly connected to the two mounting brackets 33. The interior of the cutting frame 54 is hollow and forms a cutting knife cavity, which encloses the cutting slide rail 51, the cutting slide block 52, and the cutting knife 53 inside. On one side of the cutting frame 54, there is a cutting slot 55 matching the cutting knife 53, and the cutting knife 53 extends outward along the cutting slot 55 in the cutting knife cavity. Both the front and rear ends of the cutting slide rail 51 are bent by up to 90° to form a bent portion 56. The second cutting structure 5b has the same structure as the first cutting structure 5a. After the first cutting structure 5a and the second cutting structure 5b adopt the above structures, both the first cutting structure 5a and the second cutting structure 5b are fixed on the mounting bracket 33 through the cutting frame 54. When in the reset state, the cutting slide block 52 is located at one end of the cutting slide rail 51. When the printing paper needs to be cut, the cutting slide block 52 is powered through the power supply line to move along the cutting slide rail 51 in the cutting knife cavity. The cutting slide block 52 drives the cutting knife 53 to move from one end of the cutting slide rail 51 to the other end. Since the cutting edge of the cutting knife 53 extends outward from the cutting slot 55, the cutting knife 53 completes the cutting of the printing paper during the movement. During the process of cutting the printing paper by the first cutting structure 5a and the second cutting structure 5b in the above manner, the force exerted by the cutting knife 53 on the printing paper is relatively low, avoiding the shaking of the printing paper during the cutting process and improving the flatness of the cutting end of the printing paper.

[0034] Further, when the first cutting structure 5a and the second cutting structure 5b are in the reset state, the cutting slide block 52 is located at one end of the bent portion 56 of the cutting slide rail 51. At this time, the cutting knife 53 is completely received inside the cutting cavity, and it will only move along the cutting slide rail 51 and extend outward from the cutting slot 55 when the cutting knife 53 cuts the printing paper, avoiding the cutting knife 53 from scratching the staff when installing the printing coil in the feeding group 3, which is beneficial to improving the safety of the present invention.

[0035] As one of the preferred embodiments of the present invention, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 10, on the side of the second material cutting structure 5b away from the second guiding roller 35, there is a material clamping plate 6. At both the front and rear ends of the material clamping plate 6, there are reset tension springs 61, and the ends of the reset tension springs 61 are fixedly connected to the material cutting frame 54. After adopting this structure, in the reset state, under the pulling force of the reset tension springs 61, the material clamping plate 6 closely adheres to the surface of the material cutting frame 54. The leading end of the printing paper in the printing coil waiting for roll change can be clamped and fixed by the material clamping plate 6 and the material cutting frame 54, so that the printing paper fixed in the feeding group 3 has a certain tension, which is convenient for the second material cutting structure 5b to cut the printing paper.

[0036] As one of the preferred embodiments of the present invention, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , at both the front and rear ends of the center roller 31, there are center shaft rods 37, and the reset torsion spring 32 is sleeved on the surface of the center shaft rod 37. On one side of the frame 1, there is a reset sleeve 11 with a hollow interior and matching the reset torsion spring 32. The reset sleeve 11 wraps the reset torsion spring 32 and the center shaft rod 37 together inside. One end of the reset torsion spring 32 is fixedly connected to the inner wall of the reset sleeve 11, and the other end is fixedly connected to one side of the center shaft rod 37. The reset sleeve 11 is fixedly connected to the frame 1, and the center roller 31 rotates inside the reset sleeve 11 through the center shaft rod 37. When the printing coil is completely unwound and the fixing rod at the end of the printing paper is stuck in the material clamping groove, when the center roller 31 rotates, it will twist the reset torsion spring 32 and store elastic potential energy in the reset torsion spring 0. After the first material cutting structure 5a cuts the end of the printing paper subsequently, the reset torsion spring 32 will release the elastic potential energy and make the center roller 31 rotate in the reset direction, so as not to affect the normal feeding of the printing paper.

[0037] As one of the preferred embodiments of the present invention, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , between the lower part of the material storage group 4 and the feeding group 3, there is an adjusting roller 7 extending in the front-rear direction. There are two adjusting rollers 7 and they are distributed left and right. A material passage groove is formed between the two adjusting rollers 7. The two adjusting rollers 7 are used to adjust the position of the printing paper entering the material storage group 4. The two adjusting rollers 7 are located directly above the central position between the two feeding groups 3, so that the printing paper always leaves the feeding group 3 and enters the material storage group 4 through a unified position, ensuring that the second material cutting structure 5b can accurately cut the factor paper.

[0038] In summary, the present invention discloses a printing material unwinding device capable of achieving roll change without stopping the machine. The unwinding device can install and fix two rolls of printing materials through two unwinding rollers 2. When one roll of printing material is completely unwound, its end is clamped in the material clamping groove through a fixing rod. The printing paper drives the central roller of the feeding group 3 to rotate, so that the printing papers of the two rolls of printing materials are connected end to end. Subsequently, the first cutting structure 5a and the second cutting structure 5b respectively cut the redundant parts at the ends of the two rolls of printing materials and complete the operation of material connection and roll change. During the process of material connection and roll change, the cached printing paper is released through the storage group 4 at the same time to enable the printing equipment to continue printing, thereby realizing that the printing equipment does not stop during the roll change process of the printing material.

[0039] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A continuous unwinding device for a printing equipment without stopping the machine, comprising a frame (1), an unwinding roller (2), a feeding group (3), and a stockpiling group (4), characterized in that, There are two unwinding rollers (2), and both ends are movably connected to the frame (1). The feeding group (3) is located between the two unwinding rollers (2). The feeding group (3) includes the following structure: a center roller (31), which extends in the front-rear direction and both ends are movably connected to the frame (1). A return torsion spring (32) is sleeved on both ends of the center roller (31). One end of the return torsion spring (32) is fixedly connected to the center roller (31), and the other end is fixedly connected to the frame (1). Installation brackets (33) are provided at both ends of the center roller (31). A first guiding roller (34) and a second guiding roller (35) are movably connected between the two installation brackets (33). The distance between the first guiding roller (34) and the center roller (31) is greater than the distance between the second guiding roller (35) and the center roller (31). An introducing roller (36) is provided on the side of the first guiding roller (34) away from the second guiding roller (35). There are two introducing rollers (36), and a material clamping groove is formed between the two introducing rollers (36). A first cutting structure (5a) is provided between the first guiding roller (34) and the introducing roller (36). A second cutting structure (5b) is provided on the side of the second guiding roller (35) away from the first guiding roller (34). There are two sets of the feeding group (3), and the two sets of the feeding group (3) are mirror-symmetrical in the left-right direction. The two sets of the feeding group (3) are matched with the two unwinding rollers (2) one by one. The storage group (4) is arranged above the two sets of the feeding group (3). The storage group (4) is provided with a number of storage rollers (41) arranged in a staggered manner up and down in sequence. The ends of the storage rollers (41) are movably connected to the frame (1).

2. The continuous unwinding device for a printing device according to claim 1, characterized in that, The first cutting structure (5a) includes the following structure: a cutting slide rail (51), which extends in the front-rear direction and a matching cutting slide block (52) is mounted on one side. A cutting knife (53) extending away from the center roller (31) is provided on one side of the cutting slide block (52). Knife edges are provided on both the front and rear sides of the cutting knife (53).

3. The continuous unwinding device for a printing apparatus according to claim 2, wherein, The first cutting structure (5a) further includes the following structure: a cutting frame (54), the two ends of which are respectively fixedly connected to the two installation brackets (33). The interior of the cutting frame (54) is hollow to form a cutting knife cavity, which wraps the cutting slide rail (51), the cutting slide block (52), and the cutting knife (53) inside. A cutting groove (55) matching the cutting knife (53) is provided on one side of the cutting frame (54). The cutting knife (53) extends outward along the cutting groove (55) in the cutting knife cavity. Both the front and rear ends of the cutting slide rail (51) are bent by up to 90° to form bending parts (56). The structure of the second cutting structure (5b) is the same as that of the first cutting structure (5a).

4. The continuous unwinding device for a printing device according to claim 3, characterized in that, A clamping plate (6) is provided on the side of the second cutting structure (5b) away from the second guiding roller (35). Return tension springs (61) are provided at both the front and rear ends of the clamping plate (6), and the ends of the return tension springs (61) are fixedly connected to the cutting frame (54).

5. The continuous unwind device for a printing apparatus according to claim 1, wherein Both front and rear ends of the central roller (31) are provided with central shaft rods (37), and the return torsion spring (32) is sleeved on the surface of the central shaft rod (37); On one side of the frame (1), there is a return sleeve (11) with a hollow interior and matching the return torsion spring (32). The return sleeve (11) wraps the return torsion spring (32) and the central shaft rod (37) together inside. One end of the return torsion spring (32) is fixedly connected to the inner wall of the return sleeve (11), and the other end is fixedly connected to one side of the central shaft rod (37).

6. The continuous unwind device for a printing apparatus according to claim 1, wherein, The material storage group (4) includes two material storage roller groups distributed left and right and composed of a number of material storage rollers (41). The material storage rollers (41) in the material storage roller group are distributed in sequence in the up and down direction, and the projections formed by the material storage rollers (41) between the two material storage roller groups in the left and right direction are arranged staggeredly.

7. The continuous unwinding device for a printing apparatus according to claim 6, characterized in that, The ends of the material storage rollers (41) in any one of the material storage roller groups are jointly movably connected with a connecting plate (42). A damping telescopic rod (43) is arranged between the two connecting plates (42). A material storage slider (44) is arranged on one side of one of the connecting plates (42) close to the frame (1), and a chute (12) matching the material storage slider (44) is arranged on one side of the frame (1).

8. The continuous unwind device for a printing apparatus according to claim 1, wherein Between the material storage group (4) and the feeding group (3) below, there is an adjusting roller (7) extending in the front and rear direction. There are two adjusting rollers (7) distributed left and right, and a material through groove is formed between the two adjusting rollers (7).

Images