JPS60105544A - Chucking device for printer - Google Patents

Abstract

PURPOSE:To permit the precise regulation and quick feeding of chucking device by engaging an outer housing having a fine regulator mechanism with an inner housing holding the chucking device in a movable manner by a rack and a pinion. CONSTITUTION:In the inner housing 10 of a chucking device 4 fixed to a frame 2, a rack 10B in the axial direction is provided, and a chucking device 6 is rotatably supported inside in a movable manner toward the axial direction. The outer housing 12 is held on the inner housing 10 in a movable manner toward the axial direction in relation to the inner housing 10. A fine regulator shaft 24 is turned to turn slightly a worm wheel 23 through a worm 25, the shaft 20 is slightly moved to the axial direction to move the chucking device 6, and thereby the widthwise position of the plate cylinder 1 is precisely adjusted. When a quick sending shaft 16 is turned, the chucking device 6 with the outer housing 12 can be quickly moved through the engagement of the pinion 13 and the rack 10B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chuck device used for supporting the end of a plate cylinder in the printing section of a rotary printing press, or for supporting the end of a web core in a reel stand. This invention relates to a chuck device.

BACKGROUND ART Conventionally, as a device for supporting a plate cylinder of a printing press, a chuck device including chuck members projecting from frames on both sides of the plate cylinder and supporting both ends of the plate cylinder, respectively, has been widely used. One of the chuck members is used for adjusting the position of the plate cylinder in the width direction, and the other side is used for attaching and removing the plate cylinder.

The chuck member for position adjustment is movable in the axial direction with respect to the frame, and by rotating the adjustment shaft, which is usually turned by hand, the chuck member is moved in the axial direction through a worm, a gear mechanism, and a feed screw mechanism. It is configured to move. In such a chuck device for position adjustment, in order to precisely adjust the widthwise position of the plate cylinder, the amount of movement of the chuck member per one rotation of the adjustment shaft is usually set to be extremely small. However, the width of the plate cylinder often changes, and the chuck member must be moved greatly in the axial direction each time, but as mentioned above, the amount of movement of the chuck member per one rotation of the adjustment shaft is small. The disadvantage is that the adjustment shaft must be rotated an extremely large number of times, making the operation cumbersome and time-consuming.

The present invention aims to eliminate the drawbacks of the prior art, and provides a chuck device that can rapidly advance the chuck member when changing the width of the plate cylinder, and can precisely feed the chuck member when adjusting the plate cylinder position N. The purpose is to

Hereinafter, the present invention will be described in detail using embodiments of the accompanying drawings.

FIG. 1 is a plan view schematically showing a plate cylinder 1 of a printing press and its support device. The plate cylinder 1 is supported by a chuck element 5.6 of a chuck device 3.4 mounted on the frame 2.2. The chuck member 5 of the chuck device 3 on one side (the right side in the drawing) is moved in the axial direction by a pneumatic cylinder, and normally the plate cylinder 1 is moved by the chuck member 6 of the other chuck device 3.
Press and hold. The other chuck member 6 is the plate cylinder 1
It plays the role of holding the plate cylinder and regulating the position of the plate cylinder. Note that a device for rotating the chuck member is connected to the chuck member 5, but illustration thereof is omitted.

A chuck device 4 equipped with a chuck member 6 for regulating the position of the plate cylinder constitutes an embodiment of the present invention, and will be referred to as the second embodiment below.
This will be explained with reference to FIG. The chuck device 4 has an inner housing 10 fixed to the frame 2. The inner housing 10 has a cylindrical sliding surface 10A and an axial rack 10B on the outer surface, and supports the chuck member 6 rotatably and axially movably via a roller bearing 11 on the inner side.

Additionally, the inner housing 10 carries an outer housing 12 having a cylindrical inner surface 12A that slidably engages an outer sliding surface 10A thereof, and the outer housing 12 is axially movable relative to the inner housing 10. be.

The outer housing 12 rotatably holds a pinion shaft 14 having a pinion 13 that meshes with the rack IOH. The binion shaft 14 also has a worm wheel 15 which meshes with the worm 11 of a rapid traverse shaft 16 rotatably held in the outer housing 12. Thus, the rapid feed shaft 16, the worm 17, and the worm wheel 1
5 constitutes a means for rotating the pinion 13, which rotates the pinion 13 by rotating the rapid feed shaft 16;
The outer housing 12 can be moved by the engagement between the rack 10B and the pinion 13. Note that 18 is a clamper that fixes the rapid feed shaft 16 so that it does not rotate.

The outer housing 12 further holds a screw shaft 20 that is located coaxially with the chuck member 6 and is movable in the axial direction. The screw shaft 20 is prevented from rotating by a key 21,
The tip end thereof is connected to the chuck member 6 via the thrust F shaft shell 22.

The screw shaft 20 has a male thread 20A, which engages a female thread 23A formed on a worm wheel 23 rotatably held in a fixed position in the outer housing 12. The worm wheel 23 is engaged with the worm 25 of the worm shaft 24 and rotates as the worm shaft 24 rotates.

The worm shaft 24 is for finely adjusting the chuck member 6, and is hereinafter referred to as a fine adjustment shaft. The fine adjustment shaft 24 has an operating handle 24A. Note that 26 in FIG. 3 is a clamp lever that fixes the fine adjustment shaft 24 so that it does not rotate.

Next, a method of using the chuck device 4 having the above structure will be explained. When finely adjusting the chuck member 6, use the clamp lever.
26, and turn the handle 24A to adjust the fine adjustment shaft 24.
Rotate. Since the rotation of the fine adjustment shaft slightly rotates the worm wheel 23 via the worm 25, the threaded shaft 20 is
is moved in the axial direction, and the chuck member 6 is also moved accordingly. Thus, by turning the fine adjustment shaft 24, the position of the chuck member 6 can be finely adjusted, and the widthwise position of the plate cylinder 1 supported by the chuck member 6 can be precisely adjusted.

Next, when replacing the plate cylinder 1 with a wider one as shown by the two-dot chain line in FIG. 1, it is desirable to rapidly advance the chuck member 6. In this case, loosen the clamper 18,
Turn the rapid feed shaft 16 to rotate the pinion 13. Then, since the pinion 13 is engaged with the rack 10I3, the entire outer housing 12 holding the pinion 13 moves in the axial direction, and this movement is transmitted to the chuck member 6 via the screw shaft 20, so that the chuck member 6 also moves outward. It moves together with the housing 12. Thus, the fine adjustment shaft 24
The chuck member can be moved much more quickly than by rotating the chuck member.

Note that the above explanation is for a case where the present invention is applied to a chuck device that supports a plate cylinder, but the present invention is not limited to this, and the core of the web is supported by a reel stand in a winding section or a paper feeding section. A chuck device← is also applicable.

As described above, the present invention has an inner housing that movably holds a chuck member in the axial direction, and an outer housing that movably holds the chuck member, and the outer housing includes a fine adjustment shaft (worm shaft), a worm wheel, and a screw shaft. A fine adjustment mechanism is provided, and a rack is formed on the inner housing, and a pinion that engages with the acid rack and a means for rotating the pinion are provided on the outer housing, so the fine adjustment shaft can be rotated with the outer housing fixed. It has the excellent effect that the chuck member can be precisely adjusted by turning it, and the chuck member can be rapidly moved by moving the outer housing using the rack and pinion.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a plate cylinder support section equipped with a chuck device 4 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the chuck device 4, and FIG. 3 is a partially sectional front view of the chuck device 4. 0 1... Plate cylinder 4... Chuck device 6... Chuck member 10... Inner housing 10
A... Cylindrical sliding surface 10B... Rack 12... Outer housing 13... Pinion 15... Worm wheel 16... Rapid feed shaft 20... Screw shaft 20A... Male thread 23...・Worm wheel 23A...Female thread 24...Worm shaft 25...Worm control・Agent Patent attorney Kyozo Norimatsu

Claims (1)

[Scope of Claims] An inner housing fixed to a frame and having an axial rack on its outer surface; a chuck member supported movably in the axial direction by the inner housing; and a chuck member supported movably in the axial direction by the inner housing. a pinion rotatably retained in the outer housing and engaged with the rack; means for rotating the pinion; and a pinion axially movably supported within the outer housing and coupled to the chuck member. A chuck for a printing press comprising: a threaded shaft; a worm wheel having a female thread that engages with the male thread of the threaded shaft; and a worm wheel rotatable in a fixed position within an outer housing; Device.