Printing plate roller lifting device

Abstract

The utility model discloses a forme roller lifting device which comprises a forme roller seat, a forme roller seat, a driving mechanism, a clutch swing arm and an eccentric shaft, the forme roller seat is used for installing a forme roller, and the forme roller seat is movably connected with the forme roller seat; the driving mechanism is fixedly connected with the printing roller seat, the driving mechanism is in driving connection with the clutch swing arm, the eccentric shaft is rotationally installed on the printing roller seat, the eccentric shaft is rotationally connected with the printing plate roller seat, and the eccentric shaft is fixedly connected with the clutch swing arm. The printing plate roller can be effectively separated from a roller abutting against the printing plate roller in the printing process, and when the printing plate roller is not used for printing, a flexible plate wrapping the outer surface of the printing plate roller can be prevented from being extruded by an anilox roller and an impressing roller.

Description

Technical Field

[0001] The utility model relates to flexible printing machinery, in particular to a plate cylinder lifting device. Background Art

[0002] In the existing flexographic printing machinery, when it is shut down and not in use, the plate cylinder and the flexible plate pasted on the plate cylinder are extruded by the anilox roll and the impression cylinder. The flexible plate is easily deformed after being extruded for a long time, which will affect the printing process and reduce the service life of the flexible plate. Summary of the Utility Model

[0003] In order to solve the problems existing in the prior art, the utility model provides a plate cylinder lifting device to separate the anilox roll and the impression cylinder from the plate cylinder when the printing machinery stops, so as to avoid the flexible plate from being extruded.

[0004] To achieve the above object, the technical solution adopted by the utility model is a plate cylinder lifting device, which includes a printing roll seat, a plate cylinder seat, a driving mechanism, a clutch swing arm and an eccentric shaft. The plate cylinder seat is used for installing the plate cylinder, and the plate cylinder seat is movably connected with the printing roll seat; the driving mechanism is fixedly connected with the printing roll seat, the driving mechanism is drivingly connected with the clutch swing arm, the eccentric shaft is rotatably installed on the printing roll seat, the eccentric shaft is rotatably connected with the plate cylinder seat, and the eccentric shaft is fixedly connected with the clutch swing arm. A flexible plate is installed on the surface of the plate cylinder, and during printing, the flexible plate is in contact with the anilox roll and the impression cylinder.

[0005] In an embodiment of the utility model, the plate cylinder seat includes a first installation part and a second installation part. The second installation part is fixedly installed below the first installation part. The first installation part is used for installing the plate cylinder, the second installation part is used for installing the eccentric shaft, and the second installation part can move up and down in the printing roll seat. The second installation part is installed in the printing roll seat.

[0006] In an embodiment of the utility model, an eccentric shaft installation groove or an eccentric shaft installation hole is formed in the second installation part. The eccentric shaft installation groove or the eccentric shaft installation hole penetrates through the second installation part, and the eccentric shaft is arranged in the eccentric shaft installation groove or the eccentric shaft installation hole.

[0007] In an embodiment of the utility model, the eccentric shaft installation groove is an open groove with three open sides.

[0008] In an embodiment of the utility model, the groove side wall of the eccentric shaft installation groove is a plane, and the groove bottom wall of the eccentric shaft installation groove is an arc.

[0009] In an embodiment of the present utility model, the eccentric shaft includes a mounting portion, an eccentric portion, and a connecting portion. The mounting portion is rotatably mounted on the printing roller seat. The eccentric portion is located in the eccentric shaft mounting groove or the eccentric shaft mounting hole. The connecting portion is connected to the clutch swing arm. The diameter of the mounting portion is greater than the distance between the two groove side walls of the eccentric shaft mounting groove or greater than the diameter of the eccentric shaft mounting hole. The connecting portion passes through the clutch swing arm, and the clutch swing arm is fixedly connected to the mounting portion by screws.

[0010] In an embodiment of the present utility model, the driving mechanism is a cylinder, an oil cylinder, an electric cylinder, or a cam mechanism with self-locking.

[0011] In an embodiment of the present utility model, the lifting device is symmetrically mounted at both ends of the printing plate roller.

[0012] The technical solution has the following beneficial effects:

[0013] The driving mechanism drives the clutch swing arm to swing, and the clutch swing arm drives the eccentric shaft to rotate, so that the printing plate roller seat can move vertically, and thus the printing plate roller can be lifted and lowered as needed. In this way, the printing plate roller can be effectively separated from the roller that abuts against it during printing. When not printing, the flexographic plate wrapped on the outer surface of the printing plate roller can be protected from being squeezed by the anilox roller and the impression roller. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the working state of the printing plate roller in an embodiment of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the lifted state of the printing plate roller in an embodiment of the present utility model;

[0016] Figure 3 is a schematic three-dimensional structural diagram of an embodiment of the present utility model;

[0017] Figure 4 is the present utility model Figure 3 of the partial structural diagram;

[0018] Figure 5 is the present utility model Figure 3 of another perspective structural diagram;

[0019] Figure 6 is the present utility model Figure 5 of the partial structural diagram;

[0020] Figure 7 is a top view of an embodiment of the present utility model;

[0021] Figure 8 is a partial cross-sectional view of an embodiment of the present utility model;

[0022] Figure 9 It is an assembly schematic diagram between an eccentric shaft and a plate cylinder seat in an embodiment of the present utility model;

[0023] Figure 10 It is the front view of the eccentric shaft in an embodiment of the present utility model;

[0024] Figure 11 It is the perspective view of the eccentric shaft in an embodiment of the present utility model;

[0025] Figure 12 It is the front view of the plate cylinder seat in an embodiment of the present utility model;

[0026] Figure 13 It is the top view of the plate cylinder seat in an embodiment of the present utility model;

[0027] Figure 14 It is the left view of the plate cylinder seat in an embodiment of the present utility model;

[0028] Figure 15 It is the front view of the plate cylinder seat with an eccentric shaft mounting hole in an embodiment of the present utility model.

[0029] Explanation of reference numerals: printing roller seat 1, plate cylinder seat 2, driving mechanism 3, clutch swing arm 4, eccentric shaft 5, groove side wall 6, groove bottom wall 7, mounting part 8, eccentric part 9, connecting part 10, first mounting part 21, second mounting part 22, eccentric shaft mounting groove 50, eccentric shaft mounting hole 60, plate cylinder 100, flexographic plate 111, anilox roller 222, impression cylinder 333. Detailed implementation manners

[0030] The following combines the embodiments and the attached Figures 1 to 15 to further describe the present utility model.

[0031] A plate cylinder lifting device, such as Figures 1 - 2 , is used to lift the plate cylinder 100, so that the plate cylinder is separated from the anilox roller and the impression cylinder. The plate cylinder 100 and the flexographic plate 111 pasted on the surface of the plate cylinder will not be squeezed by the anilox roller 222 and the impression cylinder 333, and the flexographic plate will not be deformed, thereby prolonging the service life of the flexographic plate 111.

[0032] Such as Figures 3 - 7As shown, the lifting device includes a printing roller base 1, a plate cylinder base 2, a driving mechanism 3, a clutch swing arm 4, and an eccentric shaft 5. The plate cylinder base is used to mount the plate cylinder 100, and the plate cylinder base is movably connected to the printing roller base. The driving mechanism is fixedly connected to the printing roller base, the driving mechanism is drivingly connected to the clutch swing arm 4, one end of the clutch swing arm 4 is fixedly connected to the eccentric shaft 5, and the eccentric shaft 5 is rotatably connected to the plate cylinder base. In this embodiment, the driving mechanism 3 is a cylinder. In other embodiments, an oil cylinder, an electric cylinder, or a cam mechanism with self-locking can also be used.

[0033] The plate cylinder base includes a first mounting portion 21 and a second mounting portion 22. The second mounting portion 22 is fixedly installed below the first mounting portion 21. The first mounting portion 21 is used to mount the plate cylinder, and the second mounting portion 22 is used to mount the eccentric shaft 5. As Figure 8 shown, the second mounting portion 22 is inserted into the printing roller base, and the second mounting portion 22 can move up and down relative to the printing roller base.

[0034] As Figures 9 - 14 shown, an eccentric shaft mounting groove 50 is formed in the second mounting portion 22, and the eccentric shaft mounting groove 50 penetrates through the second mounting portion 22. The eccentric shaft mounting groove 50 is an open groove with three open sides. The groove side wall 6 of the eccentric shaft mounting groove 50 is a plane, and the groove bottom wall 7 of the eccentric shaft mounting groove 50 is arc-shaped. The eccentric shaft includes a mounting portion 8, an eccentric portion 9, and a connecting portion 10. The mounting portion 8, the eccentric portion 9, and the connecting portion 10 are integrally formed structures. The mounting portion 8 is rotatably mounted on the printing roller base 1, and the diameter of the mounting portion 8 is larger than the distance between the two groove side walls 6 of the eccentric shaft mounting groove 5. The eccentric portion 9 is stuck in the eccentric shaft mounting groove. When the eccentric shaft 5 rotates, it drives the plate cylinder base 2 to move up and down. The connecting portion 10 is connected to the clutch swing arm 4. In this embodiment, the connecting portion 10 passes through an opening in the clutch swing arm, and the clutch swing arm is fixedly connected to the mounting portion by screws.

[0035] In other embodiments, as Figure 15 shown, an eccentric shaft mounting hole 60 can also be formed in the second mounting portion 22 to mount the eccentric shaft. The diameter of the mounting portion 8 is larger than the diameter of the eccentric shaft mounting hole 5. At this time, the eccentric shaft mounting hole 60 is a through hole that horizontally penetrates the second mounting portion 22, and the eccentric shaft is inserted into the eccentric shaft mounting groove or the eccentric shaft mounting hole.

[0036] On the printing machine, the lifting device is symmetrically installed at both ends of the plate cylinder 100. When the printing machine stops, as Figure 2As shown, upon receiving an instruction from the control system, the cylinder of the driving mechanism 3 pushes forward, causing the clutch swing arm 4 to swing, driving the eccentric shaft 5 to rotate. The eccentric shaft 5 drives the plate cylinder base 2 sleeved in the plate cylinder seat 1 to rise, disengaging from the anilox roll 222 and the impression cylinder 333. In this way, the plate cylinder 100 and the flexographic plate 111 adhered to the plate cylinder will not be squeezed by them. When starting the machine, as Figure 1 shown, upon receiving an instruction from the control system, the clutch cylinder pulls backward, causing the clutch swing arm 4 to swing in the opposite direction, driving the eccentric shaft 5 to rotate in the reverse direction. The eccentric shaft 5 drives the plate cylinder base 2 sleeved in the plate cylinder seat 1 to descend, coming into normal contact with the anilox roll 222 and the impression cylinder 333, and returning to the working state.

[0037] The above specific embodiments are only used to explain and illustrate the present invention, rather than limiting the present invention. Any change and substitution made to the present invention without creative labor within the scope of the concept and claims of the present invention fall within the protection scope of the present invention patent.

Claims

1. A plate roller lifting device, characterized in that: It includes a printing roller seat, a plate roller seat, a driving mechanism, a clutch swing arm and an eccentric shaft. The plate roller seat is used to install the plate roller, and the plate roller seat is movably connected to the printing roller seat; the driving mechanism is fixedly connected to the printing roller seat, and the driving mechanism is drivingly connected to the clutch swing arm. The eccentric shaft is rotatably installed on the printing roller seat, the eccentric shaft is rotatably connected to the plate roller seat, and the eccentric shaft is fixedly connected to the clutch swing arm.

2. The plate roller lifting device according to claim 1, characterized in that: The printing plate roller seat includes a first mounting portion and a second mounting portion, wherein the second mounting portion is fixedly mounted below the first mounting portion, the first mounting portion is used to mount the printing plate roller, the second mounting portion is used to mount the eccentric shaft, and the second mounting portion can move up and down in the printing roller seat.

3. The plate roller lifting device according to claim 2, characterized in that: An eccentric shaft mounting groove or an eccentric shaft mounting hole is formed on the second mounting portion, the eccentric shaft mounting groove or the eccentric shaft mounting hole passes through the second mounting portion, and the eccentric shaft is inserted into the eccentric shaft mounting groove or the eccentric shaft mounting hole.

4. The plate roller lifting device according to claim 3, characterized in that: The eccentric shaft installation groove is an open groove with openings on three sides.

5. The plate roller lifting device according to claim 4, characterized in that: The groove side wall of the eccentric shaft installation groove is a plane, and the groove bottom wall of the eccentric shaft installation groove is an arc.

6. The plate roller lifting device according to claim 3, characterized in that: The eccentric shaft comprises a mounting part, an eccentric part and a connecting part. The mounting part is rotatably mounted on the printing roller seat, the eccentric part is located in the eccentric shaft mounting groove or the eccentric shaft mounting hole, and the connecting part is connected to the clutch swing arm.

7. The plate roller lifting device according to claim 1, characterized in that: The driving mechanism is an air cylinder, an oil cylinder, an electric cylinder or a cam mechanism with self-locking function.

8. The plate roller lifting device according to any one of claims 1 to 7, characterized in that: The lifting device is symmetrically installed at both ends of the printing plate roller.

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