Tension roller mounting assembly and rotary press

Abstract

The utility model relates to the technical field of printing equipment, in particular to a tension roller mounting assembly and a rotary press, comprising: two swing plates swinging around swing points; the two ends of the tension roller are rotationally connected with the two swing plates correspondingly, and the tension roller can be in rolling connection with paper; the two adjusting pieces are movably connected with the swing plate, the connecting points of the adjusting pieces and the tension roller and the swing plate are located on the two opposite sides of the swing point respectively, and the adjusting pieces enable the swing plate to swing so that the tension roller can be close to or away from the paper; the swing plate is matched with the adjusting piece to enable the tension roller to rotate around the swing axis of the swing plate so as to achieve approaching or leaving of paper, then the pressure applied to the paper by the tension roller is changed according to the thorough drying condition of the cold-set ink, and the situation that the pressure applied to the paper by the tension roller is not matched with the thorough drying condition of the cold-set ink is reduced; the cold-set printing ink which is not dried thoroughly on two adjacent pieces of paper is contaminated by each other, so that the possibility that the paper becomes dirty is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of printing equipment, and in particular to a tension roller mounting assembly and a rotary printing machine. Background Art

[0002] Commercial rotary presses are important equipment in the printing industry for high-speed printing. However, when printing on paper with cold-set ink, since the drying time of cold-set ink is relatively long, the cold-set ink that has not dried enters the folding section during high-speed operation, and then under the action of the tension roller, the upper and lower layers of paper are adhered together, resulting in the adhesion of the undried cold-set ink on the paper, thereby reducing the quality of the printed matter.

[0003] The prior art discloses a rotary press with constant tension maintenance, which includes an ink delivery device, a printing device, a paper receiving device, a drying device, and a control device on the printing press, and a paper feeding device installed on the printing press that can maintain constant tension; the paper feeding device includes a bracket, a paper outlet inner roller device rotatably connected to the bracket, and a paper outlet outer roller device that can be clamped with a pre-tightening force with the paper outlet inner roller device to adjust the mutual tension, and a paper tape that can be driven to rotate and released by the output end of the motor is wound around the paper outlet outer roller device.

[0004] In view of the above related technologies, the position of the upper paper outlet outer roller in the rotary press is controlled by the paper feeding device, so that the pressure exerted by the paper outlet outer roller on the paper is always kept constant. However, since the cold-set ink transferred to the paper has not dried yet, and the amount of cold-set ink attached to different areas of the paper is different, resulting in different drying times required, using a constant pressure will cause the cold-set ink between adjacent two sheets of paper to contaminate each other, making the paper dirty. Utility Model Content

[0005] In order to be able to adjust the pressure exerted by the tension roller on the paper according to the drying condition of the cold-set ink to reduce the possibility of the paper getting dirty, the present application provides a tension roller mounting assembly and a rotary printing machine.

[0006] The tension roller mounting assembly and the rotary printing machine provided by the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a tension roller mounting assembly.

[0008] A tension roller mounting assembly includes:

[0009] Two swing plates that swing around a swing point, the swing axis of the swing plates is horizontally arranged, and there is an installation space between the two swing plates;

[0010] A tension roller, both ends of the tension roller are rotatably connected to the two swing plates respectively, and the tension roller can be in rolling connection with the paper;

[0011] Two adjusting members, the adjusting members are movably connected to the swinging plate, and the connection points of the adjusting members and the tension roller with the swinging plate are respectively on opposite sides of the swinging point. The adjusting members swing the swinging plate to move the tension roller closer to or farther from the paper.

[0012] By adopting the above technical solution, the designed tension roller mounting assembly can provide a rotatable mounting base for the tension roller through two swinging plates, and the swinging plate cooperating with the adjusting member can make the tension roller rotate around the swinging axis of the swinging plate to move closer to or farther from the paper. Furthermore, the pressure exerted by the tension roller on the paper can be changed according to the drying time and drying condition required by the cold-set ink, reducing the possibility that the wet cold-set ink on adjacent two pieces of paper is contaminated with each other due to the mismatch between the pressure exerted by the tension roller on the paper and the drying condition of the cold-set ink, resulting in the paper getting dirty.

[0013] In a specific feasible embodiment, the tension roller includes:

[0014] A roller shaft, both ends of the roller shaft are rotatably connected to the two swinging plates respectively;

[0015] A plurality of paper pressing wheels, the paper pressing wheels are coaxially connected to the roller shaft, and the diameter of the paper pressing wheels is larger than that of the roller shaft. The plurality of paper pressing wheels are distributed along the axial direction of the roller shaft.

[0016] By adopting the above technical solution, the designed tension roller can facilitate the installation of a plurality of paper pressing wheels through the roller shaft. While applying pressure to the paper through the paper pressing wheels, the contact area between the paper pressing wheels and the paper can be changed by setting the positions of the paper pressing wheels, so as to avoid the concentrated area of the cold-set ink as much as possible, reducing the possibility that the wet cold-set ink on adjacent two pieces of paper is contaminated with each other, resulting in the paper getting dirty.

[0017] In a specific feasible embodiment, the paper pressing wheels are slidably connected to the roller shaft, and the paper pressing wheels slide along the axial direction of the roller shaft. A fixing member is connected to the paper pressing wheels, and the fixing member is connected to the roller shaft to make the paper pressing wheels and the roller shaft relatively stationary.

[0018] By adopting the above technical solution, the designed paper pressing wheels that can slide along the axial direction of the roller shaft can be adjusted according to the layout of the printed paper to adapt to papers in different printing situations, and the relative stationary state of the paper pressing wheels and the roller shaft can be achieved through the fixing member.

[0019] In a specific feasible embodiment, the fixing member includes:

[0020] A fixing semi-ring, the fixing semi-ring is connected to the paper pressing wheel;

[0021] A locking semi-ring, which forms a cavity for the roller shaft to pass through together with the fixed semi-ring;

[0022] Two locking bolts, the screw sections of the locking bolts pass through the locking semi-ring and are threadedly connected to the fixed semi-ring, and the roller shaft is located between the two locking bolts.

[0023] By adopting the above technical solution, the designed fixing member can realize the relative position adjustment and fixation of the paper pressing wheel and the roller shaft through the cooperation of the fixed semi-ring, the locking semi-ring and the locking bolts. Furthermore, the position of the paper pressing wheel on the roller shaft can be changed, so that the paper pressing wheel can be adjusted according to the layout of the printed paper to adapt to papers in different printing situations.

[0024] In a specific feasible implementation scheme, a rubber strip is embedded in the inner wall of the locking semi-ring, and an embedding groove for the rubber strip to extend into is formed on the roller shaft. The embedding groove is axially formed along the roller shaft.

[0025] By adopting the above technical solution, the designed rubber strip can cooperate with the embedding groove to reduce the possibility of relative rotation between the paper pressing wheel and the roller shaft.

[0026] In a specific feasible implementation scheme, the paper pressing wheel has a rubber outer edge for contacting the paper.

[0027] By adopting the above technical solution, the designed rubber outer edge can reduce the damage to the paper while applying pressure to the paper.

[0028] In a specific feasible implementation scheme, the adjusting member includes an adjusting cylinder, and the piston rod of the adjusting cylinder is rotatably connected to the swing plate.

[0029] By adopting the above technical solution, the designed adjusting member can realize the swing of the swing plate through the adjusting cylinder.

[0030] In a second aspect, the present application provides a rotary printing machine, including a printing machine body and a tension roller installation assembly, and the tension roller installation assembly is installed on the printing machine body.

[0031] By adopting the above technical solution, a rotatable installation base can be provided for the tension roller, and the swing plate cooperating with the adjusting member can enable the tension roller to rotate around the swing axis of the swing plate to approach or move away from the paper. Furthermore, the pressure applied by the tension roller to the paper can be changed according to the drying time and drying condition required for the cold-set ink, reducing the possibility that the pressure applied by the tension roller to the paper does not match the drying condition of the cold-set ink, resulting in the mutual contamination of the uncured cold-set ink on adjacent two papers and the paper getting dirty.

[0032] To sum up, the present application includes at least one of the following beneficial technical effects:

[0033] 1. The designed tension roller mounting assembly can provide a rotatable mounting base for the tension roller through two swing plates, and the swing plates cooperating with the adjusting members can enable the tension roller to rotate around the swing axis of the swing plates to approach or move away from the paper, thereby changing the pressure exerted by the tension roller on the paper according to the drying time and drying condition required for the cold-set ink, and reducing the possibility that the wet cold-set ink on adjacent two sheets of paper contaminates each other due to the mismatch between the pressure exerted by the tension roller on the paper and the drying condition of the cold-set ink, resulting in the paper getting dirty.

[0034] 2. The designed tension roller mounting assembly is convenient for installing multiple paper pressing wheels through the roller shaft. While applying pressure to the paper through the paper pressing wheels, the contact area between the paper pressing wheels and the paper can be changed by setting the positions of the paper pressing wheels, so as to avoid the concentrated area of the cold-set ink as much as possible, thereby reducing the possibility that the wet cold-set ink on adjacent two sheets of paper contaminates each other, resulting in the paper getting dirty.

[0035] 3. The designed tension roller mounting assembly can be adjusted according to the layout of the printed paper through the paper pressing wheels that can slide axially along the roller shaft to adapt to papers in different printing situations, and the relative static state of the paper pressing wheels and the roller shaft can be achieved through the fixing members. Description of the Drawings

[0036] Figure 1 is a schematic structural diagram of the tension roller mounting assembly in the embodiment of the present application.

[0037] Figure 2 is on the basis of Figure 1 a schematic structural diagram of the further optimized tension roller.

[0038] Figure 3 is on the basis of Figure 2 a three-dimensional structural diagram after adding fixing members.

[0039] Figure 4 is Figure 3 an enlarged view of part A in

[0040] Description of the Reference Numerals: 1, swing plate; 2, tension roller; 21, roller shaft; 211, embedding groove; 22, paper pressing wheel; 3, adjusting member; 31, adjusting cylinder; 4, fixing member; 41, fixing semi-ring; 42, locking semi-ring; 43, locking bolt; 5, rubber strip. Detailed Description of the Embodiment

[0041] The following further describes the present application in detail with reference to the attached Figures 1-4 drawings.

[0042] The embodiment of the present application discloses a tension roller mounting assembly and a rotary printing machine.

[0043] In a first aspect, an embodiment of the present application discloses a tension roller mounting assembly.

[0044] Referring to Figure 1 , a tension roller mounting assembly includes a swing plate 1, a tension roller 2, and an adjusting member 3. The number of swing plates 1 is two. The planes where the two swing plates 1 are located are parallel to each other, and an installation space is formed between the two swing plates 1. The swing plate 1 swings around a swing point, and the swing axis of the swing plate 1 is horizontally arranged. The tension roller 2 is located in the installation space, and both ends of the tension roller 2 are rotatably connected to the two swing plates 1 through pedestal bearings. The rotation axis of the tension roller 2 is in the same direction as the rotation axis of the swing plate 1, and the tension roller 2 can be in rolling connection with the paper; the number of adjusting members 3 is two. The two adjusting members 3 are respectively arranged close to the two swing plates 1. The adjusting member 3 is movably connected to the swing plate 1, and the connection points of the adjusting member 3 and the tension roller 2 with the swing plate 1 are respectively on opposite sides of the swing point. The adjusting member 3 drives the swing plate 1 to swing, thereby driving the tension roller 2 to approach or move away from the paper.

[0045] Referring to Figure 1 , further, in the present application, the adjusting member 3 can be set as an adjusting cylinder 31, can also be set as an electric telescopic rod, can also be set as a hydraulic rod, or other structures capable of driving the swing plate 1 to swing around the swing point. In this embodiment, the adjusting member 3 includes an adjusting cylinder 31. The body of the adjusting cylinder 31 is used for rotatably connecting with the body of the rotary printing machine, and the piston rod of the adjusting cylinder 31 is hinged to the swing plate 1.

[0046] Referring to Figure 2 and Figure 3 , the tension roller 2 includes a roller shaft 21 and a plurality of paper pressing wheels 22. Both ends of the roller shaft 21 are rotatably connected to the swing plate 1 through pedestal bearings. The paper pressing wheels 22 are sleeved on the roller shaft 21, and the paper pressing wheels 22 are coaxially connected to the roller shaft 21. The diameter of the paper pressing wheels 22 is larger than the diameter of the roller shaft 21, and the plurality of paper pressing wheels 22 are distributed along the axial direction of the roller shaft 21. In the present application, two paper pressing wheels 22 can be arranged on the roller shaft 21, three paper pressing wheels 22 can be arranged, or four paper pressing wheels 22 can be arranged, as long as the paper pressing requirements of the paper are met. In this embodiment, the number of paper pressing wheels 22 on the roller shaft 21 is four; it is convenient to install a plurality of paper pressing wheels 22 through the roller shaft 21. While applying pressure to the paper through the paper pressing wheels 22, the contact area between the paper pressing wheels 22 and the paper can be changed by setting the positions of the paper pressing wheels 22, so as to avoid the concentrated area of the cold-set ink as much as possible, thereby reducing the possibility that the unfixed cold-set ink on two adjacent papers contaminates each other and causes the paper to become dirty.

[0047] Referring to Figure 3, in order to adjust according to the layout of the printed paper to adapt to papers in different printing situations, the paper pressing wheel 22 is slidably connected to the roller shaft 21, and the paper pressing wheel 22 slides axially along the roller shaft 21; in order to achieve relative stillness between the paper pressing wheel 22 and the roller shaft 21 after the paper pressing wheel 22 slides axially along the roller shaft 21 to the end position, a fixing member 4 is connected to the paper pressing wheel 22, and the fixing member 4 is connected to the roller shaft 21 for making the paper pressing wheel 22 and the roller shaft 21 relatively stationary; in order to reduce damage to the paper, the paper pressing wheel 22 has a rubber outer edge for contacting the paper.

[0048] Referring to Figure 3 and Figure 4 , the fixing member 4 includes a fixing semi-ring 41, a locking semi-ring 42 and two locking bolts 43. The fixing semi-ring 41 is fixedly welded to the wheel body of the paper pressing wheel 22. The locking semi-ring 42 and the fixing semi-ring 41 form a cavity for the roller shaft 21 to pass through. The screw section of the locking bolt 43 passes through the locking semi-ring 42 and is threadedly connected to the fixing semi-ring 41, and the roller shaft 21 passes through the gap between the two locking bolts 43. By turning the locking bolt 43, the locking semi-ring 42 and the fixing semi-ring 41 can be made to approach each other and then press tightly against the roller shaft 21 to be fixed, realizing the relative stillness between the paper pressing wheel 22 and the roller shaft 21. In order to ensure the locking reliability of the locking bolt 43, a nut is threadedly connected to the part of the screw section of the locking bolt 43 passing through the fixing semi-ring 41.

[0049] Referring to Figure 4 , in order to further reduce the possibility of relative rotation or relative sliding between the paper pressing wheel 22 and the roller shaft 21 during the rolling operation of the paper pressing wheel 22, a rubber strip 5 is embedded in the inner wall of the locking semi-ring 42, and an embedding groove 211 for the rubber strip 5 to extend into is formed on the roller shaft 21. The embedding groove 211 is axially formed along the roller shaft 21. By turning the locking bolt 43, the locking semi-ring 42 and the fixing semi-ring 41 can be made to approach each other, and the locking semi-ring 42 drives the rubber strip 5 to move and extend into the embedding groove 211.

[0050] The implementation principle of an installation assembly of a tension roller in an embodiment of the present application is as follows: According to the printed area on the paper, a force is applied to the paper pressing wheel 22, so that the paper pressing wheel 22 moves axially along the roller shaft 21 until the paper pressing wheel 22 moves to correspond to the area of the center line or the corner line on the paper. At this time, by turning the locking bolt 43, the locking semi-ring 42 and the fixing semi-ring 41 can be made to approach each other and then press tightly against the roller shaft 21 to be fixed, realizing the relative stillness between the paper pressing wheel 22 and the roller shaft 21. Then, by controlling the adjusting cylinder 31, the piston rod of the adjusting cylinder 31 acts to drive the swing plate 1 to swing, and then drives the paper pressing wheel 22 to move closer to or away from the paper through the roller shaft 21. Then, observe the drying condition of the cold-set ink on the paper and the mutual contamination situation, and further adjust the pressure applied by the paper pressing wheel 22 to the paper until the quality of the printed matter meets the expectation.

[0051] In a second aspect, the present application provides a rotary printing press.

[0052] A rotary printing press includes a printing press body and a tension roller mounting assembly disclosed in the first aspect of the embodiments of the present application. The swing plate 1 is rotatably connected to the printing press body. The body of the adjustment cylinder 31 is rotatably connected to the printing press body. The piston rod of the adjustment cylinder 31 is hinged to the swing plate 1, and the rotation axis of the swing plate 1 and the rotation axis of the adjustment cylinder 31 are arranged in parallel.

[0053] The above are all preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A tension roller mounting assembly, characterized in that: Comprising: Two swing plates (1), the swing plates (1) swing around a swing point, the swing axis of the swing plates (1) is horizontally arranged, and there is an installation space between the two swing plates (1); A tension roller (2), both ends of the tension roller (2) are rotatably connected to the two swing plates (1) respectively, and the tension roller (2) can be in rolling connection with the paper; Two adjusting members (3), the adjusting members (3) are movably connected to the swing plates (1), and the connection points of the adjusting members (3) and the tension roller (2) with the swing plates (1) are respectively on the opposite sides of the swing point, and the adjusting members (3) swing the swing plates (1) to make the tension roller (2) approach or move away from the paper.

2. The tension roller mounting assembly according to claim 1, characterized in that: The tension roller (2) includes: A roller shaft (21), both ends of the roller shaft (21) are rotatably connected to the two swing plates (1) respectively; A plurality of paper pressing wheels (22), the paper pressing wheels (22) are coaxially connected to the roller shaft (21), and the diameter of the paper pressing wheels (22) is larger than the diameter of the roller shaft (21), and the plurality of paper pressing wheels (22) are distributed along the axial direction of the roller shaft (21).

3. The tension roller mounting assembly according to claim 2, characterized in that: The paper pressing wheels (22) are slidably connected to the roller shaft (21), and the paper pressing wheels (22) slide along the axial direction of the roller shaft (21), and a fixing member (4) is connected to the paper pressing wheels (22), and the fixing member (4) is connected to the roller shaft (21) to make the paper pressing wheels (22) relatively stationary with respect to the roller shaft (21).

4. The tension roller mounting assembly according to claim 3, wherein: The fixing member (4) includes: A fixing semi-ring (41), the fixing semi-ring (41) is connected to the paper pressing wheel (22); A locking semi-ring (42), the locking semi-ring (42) and the fixing semi-ring (41) form a cavity for the roller shaft (21) to pass through; Two locking bolts (43), the screw rod section of the locking bolts (43) passes through the locking semi-ring (42) and is threadedly connected to the fixing semi-ring (41), and the roller shaft (21) is located between the two locking bolts (43).

5. The tension roller mounting assembly according to claim 4, wherein: A rubber strip (5) is embedded in the inner wall of the locking semi-ring (42), and an embedding groove (211) for the rubber strip (5) to extend into is formed on the roller shaft (21), and the embedding groove (211) is axially opened along the roller shaft (21).

6. The tension roller mounting assembly according to claim 2, wherein: The paper pressing wheel (22) has a rubber outer edge for contacting the paper.

7. The tension roller mounting assembly according to claim 1, wherein: The adjusting member (3) includes an adjusting cylinder (31), and the piston rod of the adjusting cylinder (31) is rotatably connected to the swing plate (1).

8. A rotary printing press, characterized in that: Comprising a printing press body and a tension roller installation assembly as described in any one of claims 1-7, and the tension roller installation assembly is installed on the printing press body.

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