Glue surface printing paper length adjusting device

Abstract

The utility model discloses a glue surface printing paper length adjusting device which comprises a mounting frame, a composite roller device, an adjusting roller and an adjusting device, the composite roller device is arranged on the mounting frame, and the composite roller device is used for compositing bottom paper and surface paper; the adjusting roller is located above the composite roller device, the adjusting device is arranged on the mounting frame, the adjusting device is connected with the adjusting roller, and the adjusting device is used for driving the adjusting roller to move horizontally and transversely. The consumption length of bottom paper and surface paper in the compounding process is adjusted by adjusting the position of the adjusting roller, so that the tension of the surface paper and the bottom paper in a glue surface printing paper path is kept balanced, the problems that the compounded paper is easy to wrinkle, break and the like are well avoided, and the glue surface printing process is normally carried out; compared with a backing paper storage device which is high in cost and complex in operation in the prior art, the backing paper storage device is simple in structure, capable of reducing operation burden, low in equipment cost and free of occupying large space.

Description

Technical Field

[0001] The utility model relates to the technical field of offset printing, in particular to a device for adjusting the length of offset printing paper. Background Art

[0002] In the offset printing process for self-adhesive labels, the double-layer paper is first separated into a base and a face paper. Then, the offset printing operation is performed on the face paper alone using printing equipment. Finally, the base and face papers are laminated together using two laminating rollers. During this process, due to the different tensile properties of the base and face papers, different stretch lengths occur between them. This can cause the base paper in the paper path to become longer or shorter during the lamination process, resulting in a tighter or looser base paper. This can lead to wrinkles and breakage in the laminated paper, thus affecting the normal operation of the offset printing process.

[0003] In view of the problems existing in the above-mentioned adhesive surface printing process, such as Figure 1 As shown, the prior art adds a bottom paper storage device to the paper path of the bottom paper, and the bottom paper storage device is provided with a plurality of floating rollers. By operating the bottom paper storage device to store or release the bottom paper, the problem of loose or tight tension of the bottom paper is eliminated; however, the structure and operation of the bottom paper storage device of the prior art are relatively complex, the cost of the bottom paper storage device is relatively high, and the equipment of the bottom paper storage device occupies a large space. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a device for adjusting the length of offset printing paper, which can solve the above technical problems.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a device for adjusting the length of offset printing paper, comprising: a mounting frame, a composite roller device, an adjustment roller and an adjustment device, the composite roller device being arranged on the mounting frame, and the composite roller device being used to composite the base paper and the face paper; the adjustment roller being located above the composite roller device, the adjustment device being arranged on the mounting frame, the adjustment device being connected to the adjustment roller, and the adjustment device being used to drive the adjustment roller to move horizontally and laterally.

[0008] Preferably, the adjustment device includes an adjustment knob and a first screw, the mounting frame is provided with a first through hole, the first screw passes through the first through hole and is threadedly connected to the first through hole, the adjustment knob is arranged at one end of the first screw, and the other end of the first screw is fixedly connected to the end of the adjustment roller.

[0009] Preferably, there are two groups of adjusting devices, and the other ends of the two first screws are fixedly connected to the two end portions of the adjusting roller respectively.

[0010] Preferably, the composite roller device comprises a first composite roller and a second composite roller which are arranged horizontally, and the first composite roller and the second composite roller are arranged opposite to each other.

[0011] Preferably, the composite roller device also includes a composite knob and a second screw, the mounting frame is provided with a second through hole, the second screw passes through the second through hole and is threadedly connected to the second through hole, the composite knob is arranged at one end of the second screw, and the other end of the second screw is fixedly connected to the end of the first composite roller.

[0012] Preferably, the number of the composite knob and the number of the second screws are both two, and the other ends of the two second screws are fixedly connected to the two end portions of the first composite roller respectively.

[0013] Preferably, the offset printing paper length adjustment device further comprises a first guide roller, a second guide roller and a third guide roller which are arranged on the mounting frame.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the present invention provides a device for adjusting the length of paper for offset printing, which has the following beneficial effects: the present invention is provided with an adjusting roller and an adjusting device, which is used to drive the adjusting roller to move horizontally. The present invention enables the printing equipment to adjust the position of the adjusting roller to adjust the consumed length of the base paper and the face paper during the compounding process when the paper lengths are different during offset printing, thereby keeping the face paper and the base paper in the paper path for offset printing in a balanced tensile strength, better avoiding problems such as wrinkling and paper breaking of the compounded paper, and allowing the offset printing process to proceed normally; compared with the prior art base paper storage device with higher cost and complicated operation, the present invention has a simple structure, can reduce the operating burden, has lower equipment cost, and does not need to occupy a large space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a device used in the prior art for offset printing process;

[0017] Figure 2 This is a first structural schematic diagram of a device for adjusting the length of offset printing paper according to the present invention;

[0018] Figure 3 This is a second structural schematic diagram of a device for adjusting the length of offset printing paper according to the present invention;

[0019] Figure 4 This is a first structural schematic diagram of the composite roller device, base paper and face paper of the present invention;

[0020] Figure 5 This is a first structural diagram of the composite roller device, bottom paper, face paper and adjustment roller of the utility model;

[0021] Figure 6 This is a second structural schematic diagram of the composite roller device, base paper and face paper of the present invention;

[0022] Figure 7 This is a second structural schematic diagram of the composite roller device, base paper, face paper and adjustment roller of the utility model.

[0023] The numbers in the figure are: 1 mounting frame, 2 adjusting roller, 3 bottom paper, 4 surface paper, 5 adjusting knob, 6 first screw, 7 first composite roller, 8 second composite roller, 9 composite knob, 10 second screw, 11 first guide roller, 12 second guide roller, 13 third guide roller. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The utility model provides a device for adjusting the length of offset printing paper, comprising a mounting frame 1, a composite roller assembly, an adjustment roller 2, and an adjustment device. The composite roller assembly is mounted on the mounting frame 1 and is used to composite a base paper 3 and a face paper 4. The adjustment roller 2 is positioned above the composite roller assembly. The adjustment device is mounted on the mounting frame 1 and connected to the adjustment roller 2. The adjustment device is used to drive the adjustment roller 2 to move horizontally.

[0026] In this embodiment, the adjustment device includes an adjustment knob 5 and a first screw 6. The mounting frame 1 is provided with a first through hole. The first screw 6 passes through the first through hole and is threadedly connected to the first through hole. The adjustment knob 5 is arranged at one end of the first screw 6, and the other end of the first screw 6 is fixedly connected to the end of the adjustment roller 2. It can be understood that the user can turn the adjustment knob 5 to drive the adjustment roller 2 to move horizontally to the right or left through the first screw 6.

[0027] Specifically, the adjustment device comprises two sets, with the other ends of the two first screws 6 fixedly connected to the two ends of the adjustment roller 2. The displacement of the two first screws 6 can be controlled to be identical, using a scale or other method. The ends of the adjustment roller 2 can be provided with connecting blocks, with the other ends of the first screws 6 fixedly connected to the connecting blocks, so that the first screws 6 drive the adjustment roller 2 in synchronous movement. The adjustment roller 2 can utilize a rotatable guide roller as known in the art. Of course, in other embodiments, other existing adjustment device structures can also be used to adjust the position of the adjustment roller 2, and this is not intended to be limiting.

[0028] In addition, specifically, the composite roller device includes a first composite roller 7 and a second composite roller 8 which are arranged horizontally. The first composite roller 7 and the second composite roller 8 are arranged opposite to each other. It can be understood that there is a gap between the first composite roller 7 and the second composite roller 8. The gap is Figure 3 At the composite position shown, the bottom paper 3 and the face paper 4 (the face paper after the offset printing operation by the printing equipment) are composited together at the composite position.

[0029] The utility model can be applied to the following situations where two sheets of paper have different lengths during the offset printing process: (1) Figure 4-Figure 5 As shown, when the bottom paper 3 and the face paper 4 are laminated, the bottom paper 3 is in the outer lamination circle, and the stretching amount of the bottom paper 3 is greater than that of the face paper 4 in the inner lamination circle. Therefore, the bottom paper 3 consumes more length than the face paper during the lamination process. Therefore, the adjustment knob 5 is rotated accordingly to drive the adjustment roller 2 toward the direction close to the face paper 4 (i.e. Figure 5 The roller 2 is adjusted to absorb the excess bottom paper length so that the tension of the top paper and the bottom paper is balanced, thereby better avoiding the problems of wrinkling, paper breaking, etc. in the composite double-layer paper; (2) Figure 6-Figure 7 As shown, when the bottom paper 3 and the face paper 4 are laminated, the face paper 4 is in the outer composite circle, and the stretching amount of the face paper 4 is greater than that of the bottom paper 3 in the inner composite circle. Therefore, the surface paper 4 consumes more length than the bottom paper during the lamination process. Therefore, the adjustment knob 5 is rotated accordingly to drive the adjustment roller 2 toward the direction close to the bottom paper 3 (i.e., Figure 7 The roller 2 is adjusted to absorb the excess length of the face paper so that the tension of the face paper and the bottom paper is balanced.

[0030] In addition, preferably, the composite roller device of this embodiment further includes a composite knob 9 and a second screw 10. The mounting frame 1 is provided with a second through-hole, and the second screw 10 passes through the second through-hole and is threadedly connected to the second through-hole. The composite knob 9 is provided at one end of the second screw 10, and the other end of the second screw 10 is fixedly connected to the end of the first composite roller 7. There are two composite knobs 9 and two second screws 10, and the other ends of the two second screws 10 are respectively fixedly connected to the two ends of the first composite roller 7. It can be understood that when a user rotates the composite knob 9 to drive the first composite roller 7 to move horizontally via the second screw 10, the spacing between the first composite roller 7 and the second composite roller 8 can be easily adjusted, thereby accommodating the lamination of base paper 3 and face paper 4 of different paper thicknesses, further improving the scope of application of the present utility model.

[0031] In this embodiment, the offset printing paper length adjustment device also includes a first guide roller 11, a second guide roller 12 and a third guide roller 13 arranged on the mounting frame 1, wherein the first guide roller 11 is located below the above-mentioned first composite roller 7, the second guide roller 12 is located below the second composite roller 8, and the third guide roller 13 is located above the adjustment roller 2. The first composite roller 7 is used to conduct the bottom paper 3 to the composite position, the second guide roller 12 is used to conduct the surface paper 4 to the composite position, and the third guide roller 13 is used to conduct the double-layer paper after being composited by the adjustment roller outward.

[0032] Compared with the prior art, the present invention provides a device for adjusting the length of paper for offset printing, which has the following beneficial effects: the present invention is provided with an adjusting roller and an adjusting device, which is used to drive the adjusting roller to move horizontally. The present invention enables the printing equipment to adjust the position of the adjusting roller to adjust the consumed length of the base paper and the face paper during the compounding process when the paper lengths are different during offset printing, thereby keeping the face paper and the base paper in the paper path for offset printing in a balanced tensile strength, better avoiding problems such as wrinkling and paper breaking of the compounded paper, and allowing the offset printing process to proceed normally; compared with the prior art base paper storage device with higher cost and complicated operation, the present invention has a simple structure, can reduce the operating burden, has lower equipment cost, and does not need to occupy a large space.

[0033] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for adjusting the length of offset printing paper, characterized in that: include: A mounting frame, a composite roller device, an adjustment roller and an adjustment device, wherein the composite roller device is arranged on the mounting frame, and the composite roller device is used to composite the base paper and the face paper; the adjustment roller is located above the composite roller device, and the adjustment device is arranged on the mounting frame, and the adjustment device is connected to the adjustment roller, and the adjustment device is used to drive the adjustment roller to move horizontally.

2. The offset printing paper length adjustment device according to claim 1, characterized in that: The adjustment device includes an adjustment knob and a first screw. The mounting frame is provided with a first through hole. The first screw passes through the first through hole and is threadedly connected to the first through hole. The adjustment knob is arranged at one end of the first screw, and the other end of the first screw is fixedly connected to the end of the adjustment roller.

3. The offset printing paper length adjustment device according to claim 2, characterized in that: There are two groups of the adjustment devices, and the other ends of the two first screws are fixedly connected to the two end portions of the adjustment roller respectively.

4. The offset printing paper length adjustment device according to claim 1, characterized in that: The composite roller device includes a first composite roller and a second composite roller which are arranged horizontally, and the first composite roller and the second composite roller are arranged opposite to each other.

5. The offset printing paper length adjustment device according to claim 4, characterized in that: The composite roller device also includes a composite knob and a second screw. The mounting frame is provided with a second through hole. The second screw passes through the second through hole and is threadedly connected to the second through hole. The composite knob is arranged at one end of the second screw, and the other end of the second screw is fixedly connected to the end of the first composite roller.

6. The offset printing paper length adjustment device according to claim 5, characterized in that: There are two composite knobs and two second screw rods, and the other ends of the two second screw rods are fixedly connected to the two end portions of the first composite roller respectively.

7. The offset printing paper length adjustment device according to claim 1, characterized in that: It also includes a first guide roller, a second guide roller and a third guide roller which are arranged on the mounting frame.

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