JP3768592B2 - Furnisher roll support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a furnisher roll support device that holds a furnisher roll against a plate cylinder in a gravure printing machine, a gravure coating machine, or the like.
[0002]
[Prior art]
Conventionally, a furnisher roll provided in a gravure printing machine, a gravure coating machine, etc. is held by a swivel arm provided below the plate cylinder and the furnisher roll, and by an air cylinder connected to the swivel arm. Generally, it is pressed against the plate cylinder. However, in this configuration, there is a problem that a swiveling arm, its holding mechanism, a driving air cylinder, and the like must be arranged below the narrow plate cylinder, and the working space below the plate cylinder is further narrowed.
[0003]
Accordingly, the present applicant has previously developed a patent application for a furnisher roll support device having a structure in which a furnisher roll is held at the lower end of a roll support arm suspended from above (Japanese Patent Laid-Open No. 6-115052). reference). With this configuration, since it is not necessary to dispose the support and drive mechanism of the finisher roll below the finisher roll, the work space below the plate cylinder and the finisher roll can be enlarged. For example, there is an advantage that operations such as inking cleaning and replacement can be easily performed.
[0004]
[Problems to be solved by the invention]
However, it has been found that there is a further improvement in the apparatus disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 6-115052. That is, in this apparatus, the finisher roll is arranged so as to move in a substantially horizontal region by the swing of the roll support arm, and therefore, the furnisher roll exists at almost the same height as the plate cylinder even when separated from the plate cylinder. is doing. For this reason, when exchanging the plate cylinder, the finisher roll becomes an obstacle, and it is necessary to remove the furnisher roll or put it in and out from the lower side of the plate cylinder.
[0005]
The present invention has been made in view of such problems, and an object of the present invention is to provide a finisher roll support device that can retract the finisher roll to a position that does not interfere with plate cylinder replacement.
[0006]
[Means for Solving the Problems]
In order to solve the above-described conventional problems, the present invention holds the finisher roll at the lower end of a roll support arm that can pivot about an axis located above the plate cylinder, and A turning device capable of turning the roll support arm until it is moved to a retracted position higher than the barrel position is provided. With this configuration, when the plate cylinder is replaced, the work roll is moved to a retracted position higher than the plate cylinder position, so that a working space can be secured beside the plate cylinder, and the plate cylinder is moved almost horizontally to replace the plate cylinder. Can be performed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The finisher roll support device of the present invention supports the finisher roll at the lower end of a roll support arm that is held so as to be pivotable about an axis that is higher than the plate cylinder, and further to the roll support arm. A swivel device is connected, and the roll support arm is swiveled so that the finisher roll supported by the roll support arm is moved to a retreat position higher than the plate cylinder position. With this configuration, when the plate cylinder is exchanged, the turning device can turn the roll support arm to retract the finisher roll to a retreat position higher than the plate cylinder position.
[0008]
Here, the swivel device is provided with drive means such as an air cylinder, a torque actuator, and a motor as a drive source for turning the roll support arm, and the finisher roll is mounted on the plate cylinder with a predetermined drive means. Although it may be configured to be pressed with a pressing force and moved to the retracted position, the furnisher roll is moved separately from the driving means for moving the finisher roll to the retracted position and the driving means. It is preferable to provide a structure for providing torque applying means that acts to be pressed with a predetermined pressing force. With this configuration, the pressing force of the finisher roll can be accurately set to a desired value by the torque applying means.
[0009]
When providing a driving means for retracting the roll support arm and a torque applying means for applying a pressing force to the plate cylinder in the swivel device, the driving connection of the driving means and the torque applying means and the roll support arm is a clutch or the like. However, instead of this, in the swivel device, the swivel drive shaft provided in parallel to the swivel axis of the roll support arm, the intermediate gear rotatably held on the swivel drive shaft, An arm gear provided to rotate integrally with the roll support arm and connected to the intermediate gear is provided, the driving means is connected to the turning drive shaft, and the torque applying means is connected to the turning drive shaft. It is preferable that the intermediate gear is provided so as to rotate integrally with the intermediate gear, and a predetermined torque is applied to the intermediate gear. With this configuration, by rotating the turning drive shaft by the driving means, the intermediate gear and the torque applying means are rotated together to turn the roll support arm, and the finisher roll is moved to the retracted position or near the plate cylinder. It can be moved, and the finisher roll can be pressed against the plate cylinder with a predetermined pressing force by operating the torque applying means with the finisher roll positioned in the vicinity of the plate cylinder. A clutch or the like for switching to the torque applying means can be eliminated.
[0010]
【Example】
Hereinafter, preferred embodiments of the present invention shown in the drawings will be described. The drawings show an embodiment in which the present invention is applied to a printing unit of a gravure printing machine, FIG. 1 is a schematic sectional view of a finisher roll support device according to an embodiment of the present invention, and FIG. FIG. 3 is a view taken in the direction of arrow A and FIG. 1A and 1B are a pair of side frames of the printing unit, 3 is a plate cylinder disposed at a predetermined position in the printing unit, 4 is an impression cylinder, and 5 is a web to be printed. The impression cylinder 4 is shown in a state of being retracted above the printing position.
[0011]
Reference numeral 10 denotes a finisher roll, and 11A and 11B denote roll support arms that rotatably hold both ends of the finisher roll 10. These roll support arms 11A and 11B are held by the side frames 1A and 1B so as to be rotatable about a common axis OO at a position higher than the plate cylinder 3. That is, one roll support arm 11A is rotatably held by a rotating shaft 12A rotatably held by the side frame 1A, and the other roll support arm 11B is rotatably held by the side frame 1B. The hollow rotating shaft 12B is held so as to rotate integrally. One roll support arm 11A is rotatable with respect to the rotating shaft 12A, and the sub arm 14 is fixed to the rotating shaft 12A so as to rotate integrally therewith and is connected by an adjusting screw 15. Thus, the roll support arm 11A also rotates integrally with the rotary shaft 12A via the sub arm 14 and the adjusting screw 15. The adjusting screw 15 is provided to adjust the angle formed between the sub arm 14 and the roll support arm 11A, and is used for adjusting the phases of the left and right roll support arms 11A and 11B.
[0012]
Reference numeral 20 denotes a turning device for turning the left and right roll support arms 11A and 11B in a synchronized manner. The turning device 20 includes a turning drive shaft 22 provided in parallel to the turning axis OO of the roll support arms 11A and 11B, and a pair of intermediate gears 23A and 23B rotatably held on the turning drive shaft 22. The arm gears 24A and 24B fixed to the left and right rotating shafts 12A and 12B and meshing with the intermediate gears 23A and 23B, and the synchronous gears 25A and 25B meshing with each other so as to synchronize the rotation of the pair of intermediate gears 23A and 23B. A synchronization shaft 26 and the like fixed and held are provided. With this configuration, when the left and right intermediate gears 23A and 23B rotate in synchronization, the left and right rotation shafts 12A and 12B rotate in synchronization with each other, and the left and right roll support arms 11A and 11B synchronize with each other. It can be swiveled around -O. Here, by adjusting the angle of the sub arm 14 and the roll support arm 11A with the adjusting screw 15, the phases of the left and right roll support arms 11A, 11B can be adjusted, and the finisher roll 10 is accurately attached to the plate cylinder 3. Can be parallel.
[0013]
Mounting plates 30A and 30B are fixed to both ends of the turning drive shaft 22, respectively. Rotary actuators 32A and 32B having drive gears 31A and 31B meshing with the intermediate gears 23A and 23B, respectively, are attached to the mounting plates 30A and 30B. Is fixed. The rotary actuators 32A and 32B constitute torque applying means for applying a predetermined torque to the intermediate gears 23A and 23B in order to press the finisher roll 10 against the plate cylinder 3 with a predetermined pressing force. Here, when the operating stroke of the rotary actuators 32A and 32B is set to the retracted position, as shown in FIG. 2 and FIG. When returning to the standby position P1 slightly away from the cylinder 3 and moving forward from that position, it is determined so that it can be pressed against the plate cylinder with the smallest diameter, and therefore it is not necessary to set it too large. . In this embodiment, the rotary actuators 32A and 32B are provided on both sides. However, if a desired pressing force against the plate cylinder 3 of the finisher roll 10 can be secured by one rotary actuator, one rotary actuator is provided. The actuator 32A or 32B may be omitted. Further, instead of the rotary actuator, other torque applying means such as an air cylinder may be used.
[0014]
In FIGS. 1 and 3, a worm wheel 35 is fixed to the turning drive shaft 22, and meshes with a worm gear 37 that is rotationally driven by a turning drive motor 36. These members constitute drive means for rotating the turning drive shaft 22. Here, if the rotary actuators 32A and 32B are held at the retracted end of the operation stroke so as not to rotate, the intermediate gears 23A and 23B can rotate because they are engaged with the drive gears 31A and 31B of the rotary actuators 32A and 32B. Therefore, the intermediate gears 23 </ b> A and 23 </ b> B are fixed to the turning drive shaft 22 even though they are rotatable with respect to the turning drive shaft 22. Accordingly, when the turning drive shaft 22 is rotated by the turning drive motor 36 in this state, the intermediate gears 23A and 23B also rotate together with the turning drive shaft 22, and the roll support arms 11A and 11B are moved via the arm gears 24A and 24B. Can be swiveled.
[0015]
In this case, the roll support arms 11A and 11B are swung so that the finisher roll 10 at the standby position P1 in FIGS. 2 and 3 can be moved to the retreat position P2 higher than the plate cylinder position. It has been established. Here, in order to lift the finisher roll 10 to the retracted position P2, the roll support arms 11A and 11B must be swung to a substantially horizontal state indicated by two-dot chain lines 11A ′ and 11B ′. Requires torque. However, in this embodiment, since the worm wheel 35 and the worm gear 37 are used, the torque of the turning drive motor 36 can be enlarged and transmitted to the turning drive shaft 22. This has the advantage that a small motor can be used. Further, since the worm gear 37 is hardly rotated by the worm wheel 35, a brake for restraining the worm gear 37 from rotating the turning drive shaft 22 when the roll support arms 11A and 11B are held in a substantially horizontal state. Therefore, there is no need to provide a separate brake, and the apparatus configuration can be simplified. The drive means for rotating the turning drive shaft 22 is not limited to the configuration of the present embodiment, and can be changed as appropriate. For example, the rotation of the drive motor is transmitted using a gear train using a flat gear. Further, a change may be made such that the turning drive shaft 22 is driven by an air cylinder.
[0016]
A sprocket 40 is attached to one end of the finisher roll 10 and is connected by a chain 43 to a sprocket 42 fixed to a drive shaft 41 disposed in the hollow rotating shaft 12B. The opposite end of the drive shaft 41 is connected to a speed reducer 44, and the speed reducer 44 is drivingly connected to a drive motor 45. Thus, the finisher roll 10 is rotationally driven by the drive motor 45.
[0017]
Next, the operation of the finisher roll support device having the above configuration will be described.
In performing the printing operation, the rotary drive motor 36 rotates the rotary drive shaft 22 while the rotary actuators 32A and 32B are held at the rear end position of the operation stroke, and the roll support arms 11A and 11B are shown in FIGS. 3 is moved to a position indicated by a solid line. When the position is reached, the turning drive motor 36 is stopped, and thereafter the turning drive shaft 22 is held in a stopped state. Next, the rotary actuators 32A and 32B are operated to rotate the intermediate gears 23A and 23B in the direction of arrow C. As a result, the roll support arms 11 </ b> A and 11 </ b> B rotate in the direction of arrow D and press the holding finisher roll 10 against the plate cylinder 3. The pressing force at this time is a value corresponding to the torque applied to the intermediate gears 23A and 23B by the rotary actuators 32A and 32B. Therefore, the output torque of the rotary actuators 32A and 32B is set to a value that generates a desired pressing force. By setting, the finisher roll 10 is pressed against the plate cylinder 3 with a desired pressing force. In this state, the impression cylinder 4 is lowered and the web 5 is pressed against the plate cylinder 3 to perform a printing operation. Note that the finisher roll 10 is driven to rotate by a drive motor 45 during printing.
[0018]
When printing is finished and the plate cylinder 3 needs to be replaced, first, the rotary actuators 32A and 32B return to the rear end position of the operation stroke, rotate the intermediate gears 23A and 23B in the direction of arrow E, and roll support arms 11A and 11B are returned to the positions indicated by the solid lines in FIGS. Next, the turning drive motor 36 operates to rotate the turning drive shaft 22 in the direction of arrow E. By this rotation, the mounting plates 30A and 30B fixed to the end of the turning drive shaft 22 and the rotary actuators 32A and 32B held by the attaching plates 30A and 32B also turn together in the direction of the arrow E. Therefore, the intermediate gears 23A and 23B are also turned. Rotate together in the direction of arrow E. The rotation of the intermediate gears 23A, 23B causes the roll support arms 11A, 11B to pivot in the direction of arrow F. When the intermediate gears 23A, 23B reach the positions indicated by the two-dot chain lines 11A ′, 11B ′, the pivot drive motor 36 stops. As a result, the finisher roll 10 is retracted to the retracted position P2 higher than the position of the plate cylinder 3, and is held at that position. Thereafter, the plate cylinder 3 is exchanged. At the time of this replacement, the finisher roll 10 is in the upper retracted position P2, so that the lower part can be used effectively as a work space. For example, the plate cylinder 3 can be replaced by moving it almost horizontally. More freedom of method. Further, since it is not necessary to remove the finisher roll 10 when exchanging the plate cylinder, the plate cylinder exchange operation is simplified.
[0019]
After the plate cylinder replacement is completed, the turning drive shaft 22 is rotated again as described above to return the roll support arms 11A and 11B to their original positions, and the finisher roll 10 is moved to the plate cylinder by the rotary actuators 32A and 32B. 3 may be pressed to resume the printing operation.
[0020]
In addition, although the said Example applies this invention to a gravure printing machine, this invention is applicable not only to a gravure printing machine but other apparatuses using a finisher roll, for example, a gravure coating machine. Needless to say.
[0021]
【The invention's effect】
As described above, according to the present invention, the finisher roll is held at the lower end of the roll support arm that can be swiveled around the axis located above the plate cylinder, and the finisher roll is moved from the plate cylinder position. In addition, by providing a swivel device that can swivel the roll support arm until it is moved to a higher retreat position, the finisher roll is moved to a retreat position higher than the plate cylinder position when replacing the plate cylinder. For this reason, a large working space can be secured beside the plate cylinder, there are fewer restrictions on the plate cylinder replacement method, and an easy plate cylinder replacement method such as moving the plate cylinder almost horizontally is used. In addition, since it is not necessary to remove the finisher roll, the plate cylinder replacement work can be easily and quickly performed.
[0022]
Here, as the swivel device, in addition to a drive source for moving the finisher roll to the retracted position, there is provided a torque applying means that acts to press the finisher roll against the plate cylinder with a predetermined pressing force. Then, the effect that the pressing force of the finisher roll can be accurately set to a desired value by the torque applying means is obtained.
[0023]
Further, the swivel device has a swivel drive shaft provided in parallel to the swivel axis of the roll support arm, an intermediate gear rotatably held on the swivel drive shaft, and a single rotation with the roll support arm. And an arm gear that is drive-coupled to the intermediate gear, the drive means is drive-coupled to the turning drive shaft, the torque applying means is held to rotate integrally with the turning drive shaft, and the intermediate gear is provided. When the gear is provided so as to apply a predetermined torque, the rotation support shaft is rotated by the driving means to rotate the intermediate gear and the torque applying means together to rotate the roll support arm, and the furnisher The roll can be moved to the retracted position or near the plate cylinder, and the torque applying device is operated with the finisher roll positioned near the plate cylinder. The effect is that the finisher roll can be pressed against the plate cylinder with a predetermined pressing force, a clutch for switching between the driving means and the torque applying means is not required, and the apparatus configuration can be simplified. Is obtained.
[Brief description of the drawings]
1 is a schematic front view of a finisher roll support device according to an embodiment of the present invention. FIG. 2 is a view taken along the line AA in FIG. 1. FIG. 3 is a view taken along the line BB in FIG. Explanation】
1A, 1B Side frame 3 Plate cylinder 4 Impression cylinder 5 Web 10 Finisher rolls 11A, 11B Roll support arms 12A, 12B Rotating shaft 20 Rotating device 22 Rotating drive shafts 23A, 23B Intermediate gears 24A, 24B Arm gears 30A, 30B Mounting plate 32A, 32B Rotary actuator 35 Worm wheel 36 Rotating drive motor 37 Worm gear

Claims (3)

A finisher roll support device that holds the finisher roll against the plate cylinder so as to be pivotable about an axis located higher than the plate cylinder, and supports the finisher roll at the lower end. A finisher roll support device, comprising: a roll support arm, and a turning device for turning the roll support arm so as to move the finisher roll to a retracted position higher than a plate cylinder position. 2. The swivel device includes drive means that operates to move the finisher roll to the retracted position, and torque application means that operates to press the finisher roll against the plate cylinder with a predetermined pressing force. The described finisher roll support device. The swivel device includes a swivel drive shaft provided in parallel to a swivel axis of the roll support arm, drive means for rotating the swivel drive shaft, an intermediate gear rotatably held on the swivel drive shaft, An arm gear provided to rotate integrally with the roll support arm and drivingly connected to the intermediate gear, and a torque application that is held to rotate integrally with the turning drive shaft and applies a predetermined torque to the intermediate gear. The finisher roll supporting device according to claim 1, further comprising means.

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