JPH0756192Y2 - Upside down adjustment device for printing machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical adjustment device for a printing machine.

[0002]

2. Description of the Related Art Conventionally, an example of an upside-down adjusting device for a printing machine is disclosed in Japanese Utility Model Laid-Open No. 58-7653. The top-bottom adjustment of the printing machine is to change the phase in the circumferential direction between the impression cylinder and the blanket cylinder with ink on the surface.
Fine adjustment of the print start position when printing characters, patterns, etc. on paper. The top-bottom adjusting device of this printing machine is a cylindrical blanket cylinder, and a blanket cylinder shaft that is provided coaxially with the blanket cylinder and that projects from the end surface of the blanket cylinder in the axial direction and is rotatable integrally with the blanket cylinder. A blanket cylinder gear that is externally fitted to the blanket cylinder shaft and is rotatable with respect to the blanket cylinder shaft, and receives the rotational force from the impression cylinder gear, and a worm wheel that is externally fitted and fixed to the blanket cylinder shaft. A worm that is fixed to the blanket body gear and that meshes with the worm wheel, is provided to rotate the worm,
A plurality of gear groups having adjustment gears, an adjustment knob rotatably provided on the frame and connectable to the adjustment gears, and a relative circumferential position between the blanket cylinder shaft and the blanket cylinder gear. And an adjusting mechanism capable of adjusting. Therefore, when changing the position of the blanket cylinder shaft in the circumferential direction with respect to the blanket cylinder gear, the printing machine is first stopped. In this state, the adjustment gear is also not rotating, so the adjustment knob is pushed to connect with the adjustment gear. As a result, the adjustment knob and the worm are connected by a plurality of gear groups, so that the worm can be rotated by rotating the adjustment knob by hand, and the blanket cylinder shaft can be rotated with respect to the blanket cylinder gear via the worm wheel. Can be rotated in any direction.

[0003]

However, the above-mentioned upside-down adjusting device for a conventional printing press has the following problems. Since the top-bottom adjustment device of the printing machine has the above-mentioned structure,
During operation of the printing machine, the adjustment gear is also rotating, and the adjustment knob cannot be connected. If the adjustment knob can be connected, the adjustment knob is rotated by the adjustment gear, but if the adjustment knob is prevented from rotating by hand, the adjustment gear is also prevented from rotating, and the adjustment gear is replaced by the blanket cylinder gear. It is possible to change the relative circumferential position between the blanket cylinder shaft and the blanket cylinder gear by rotating the worm relative to the worm and rotating the worm, but it is not possible to change exactly by a predetermined amount. There is a problem. Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a top-bottom adjustment apparatus for a printing press, which enables fine adjustment even while the printing press is in operation.

[0004]

In order to solve the above problems, the present invention has the following configuration. That is, a cylindrical blanket cylinder, a blanket cylinder shaft provided coaxially with the blanket cylinder, protruding from the end face of the blanket cylinder in the axial direction, and rotatable integrally with the blanket cylinder, and an external member to the blanket cylinder shaft. The blanket cylinder gear is fitted between the blanket cylinder shaft and the blanket cylinder gear, and is rotatable between the blanket cylinder shaft and the blanket cylinder shaft. And a worm gear mechanism for adjusting the relative positions of the blanket cylinder shaft and the blanket cylinder gear in the circumferential direction, in a vertical adjustment device for a printing machine, wherein the blanket cylinder shaft or the blanket cylinder gear is provided. And a Geneva gear that rotates the worm of the worm gear mechanism about its axis.
While the Geneva gear rotates integrally with the blanket cylinder gear or the blanket cylinder shaft, the Geneva gear contacts the teeth of the Geneva gear to rotate the Geneva gear to rotate the worm about the axis. And a gear drive mechanism.

Further, the Geneva gear may be provided so that its axis is orthogonal to the axis of the blanket cylinder axis, and may be connected to the worm via a transmission mechanism. Also,
The transmission mechanism includes a first timing pulley fixed to the worm coaxially with the worm, a second timing pulley fixed to the Geneva gear coaxially with the Geneva gear, and a first timing pulley. It may be configured by using a timing belt spanned between the second timing pulley.

[0006]

The blanket cylinder shaft and the blanket cylinder gear are connected between the blanket cylinder shaft and the blanket cylinder gear, which are coaxial with the blanket cylinder and can rotate integrally with each other. Is provided with a worm gear mechanism for adjusting the relative circumferential position of the worm gear, and the blanket cylinder shaft or the blanket cylinder gear is provided with a Geneva gear that rotates the worm of the worm gear mechanism about its axis. Provided with the Geneva gear drive mechanism that rotates the Geneva gear by contacting the teeth of the Geneva gear to rotate the worm about the axis while the gear rotates integrally with the blanket cylinder gear or the blanket cylinder shaft. Therefore, by operating the Geneva gear drive mechanism while the printing press is operating, the Geneva gear can be rotated and Can rotate the worm about the axis, you can vary the relative circumferential position between the blanket Dojiku and the blanket cylinder gear by a worm gear mechanism. Also, if the Geneva gear is installed so that its axis is orthogonal to the axis of the blanket cylinder axis and connected to the worm via the transmission mechanism, the radius of rotation of the Geneva gear can be made smaller, and the transmission mechanism is coaxial with the worm. Timing fixed to the Geneva gear, a second timing pulley fixed to the Geneva gear coaxially with the Geneva gear, and timing spanning between the first timing pulley and the second timing pulley. When configured with a belt, the Geneva gear has a simple structure so that the axis of the Geneva gear is orthogonal to the axis of the blanket cylinder axis.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1A and 1B are views showing an upside-down adjustment device for a printing machine according to the present embodiment, where FIG. 1A is a partially cutaway front view, FIG. Figure 2
It is a top view which shows an example of the Geneva gear drive mechanism of FIG.
FIG. 3 is a plan view showing another example of the Geneva gear drive mechanism of FIG. 1. First, the configuration will be described. The top-bottom adjusting device of the printing machine is provided with a cylindrical blanket cylinder 10 and coaxially with the blanket cylinder 10. The blanket cylinder 10 is provided so as to project from the end surface of the blanket cylinder 10 in the axial direction.
0 and a blanket cylinder shaft 12 that can rotate integrally with the blanket cylinder shaft 12, and an impression cylinder gear 16 that is fitted onto the blanket cylinder shaft 12 and is rotatable with respect to the blanket cylinder shaft 12 and fixed to the side surface of the impression cylinder 14. A blanket cylinder gear 18 that meshes with and rotates, and is provided between the blanket cylinder shaft 12 and the blanket cylinder gear 18, connects the blanket cylinder shaft 12 and the blanket cylinder gear 18, and also connects the blanket cylinder shaft 12 and the blanket cylinder gear 18. It has a worm gear mechanism 20 that adjusts the position in the circumferential direction relative to the gear 18.
The worm gear mechanism 20 includes a worm wheel 22 that is externally fitted and fixed to the blanket cylinder shaft 12, and a worm 26 that is rotatably provided to a worm holder 24 that is fixed to the blanket cylinder gear 18. The blanket cylinder gear 18 is rotatably attached to the frame 28 via a ball bearing, so that the blanket cylinder 10 is also rotatably supported by the frame 28.

A cross-shaped Geneva gear 30 is rotatably provided on the worm holder 24 so that the axis of the Geneva gear 30 is orthogonal to the axis of the blanket barrel shaft 12.
0 is a worm 26 provided on the same worm holder 24
And a transmission mechanism. The transmission mechanism includes a first timing pulley 32 fixed to the worm 26 coaxially with the worm 26, and a second timing pulley 34 fixed to the Geneva gear 30 coaxially with the Geneva gear 30.
And a timing belt 36 spanned between the first timing pulley 32 and the second timing pulley 34.

On the side of the Geneva gear 30, the Geneva gear 3 is rotated while the Geneva gear 30 is integrally rotated with the worm holder 24 fixed to the blanket cylinder gear 18.
Geneva gear drive mechanism 38 for rotating the Geneva gear 30 in contact with the tooth of 0 to rotate the worm 26 about the axis.
Are provided on the frame 28. As shown in FIG. 2, the Geneva gear drive mechanism 38 includes first and second cam followers 42 a and 42 b slidably mounted on a bearing 40 and a support base fixed to the frame 28 together with the bearing 40, as shown in FIG. 2. It has first and second solenoids 44a and 44b mounted on (not shown) and connected to one end sides of the cam followers 42a and 42b, and switches (not shown).
4a, 44b and a drive circuit (not shown) for driving the solenoids, and when each solenoid is driven, the corresponding cam follower slides and reciprocates. The two cam followers 42a and 42b are arranged so that their axes are parallel to each other with the axis of the Geneva gear 30 interposed therebetween, and when the cam followers move forward, the side surfaces of the cam followers abut the tooth side surfaces of the Geneva gear 30, The rotation of the Geneva gear 30 is blocked.

Next, the operation will be described. First, the switch is set so that the solenoids 44a and 44b retract, and the printing machine is operated. As a result, when the impression cylinder gear 16 rotates, the blanket cylinder gear 18 that meshes with the impression cylinder gear 16 rotates in the direction of arrow A, and the blanket cylinder gear 18
The worm 26 provided on the worm holder 24 fixed to the shaft also rotates about the axis of the blanket barrel shaft 12. In addition, the worm wheel 22 that meshes with the worm 26
Is rotated together with the worm 26 by automatic tightening, so that the blanket cylinder shaft 12 and the blanket cylinder 10 rotate. At this time, the Geneva gear 30 provided on the worm holder 24 also rotates in the direction of arrow A about the blanket cylinder shaft 12 axis so that the axis thereof rotates in a plane perpendicular to the blanket cylinder shaft 12 axis.

Next, the switch is operated to control the drive circuit to drive the first solenoid 44a to move the first cam follower 42a forward. The teeth of the Geneva gear 30, which is rotating in the direction of the arrow A, are moved forward by the first cam follower 42.
When it abuts with a, the Geneva gear 30 moves in the direction of arrow B around the axis.
Rotate 90 degrees in the direction. By the rotation of the Geneva gear 30, the second timing pulley 34 fixed coaxially with the Geneva gear 30, and the first timing pulley 32 connected with the second timing pulley 34 and the timing belt 36.
Rotates, and the worm 26 rotates in the direction of arrow C about its axis, so that the worm wheel 22 and the blanket barrel shaft 12 to which the worm wheel 22 is fitted and fixed slightly moves in the direction of arrow D by a predetermined angle. Geneva gear 30 again
Rotates to the position of the first cam follower 42a, and when it comes into contact with the first cam follower 42a, the Geneva gear 30 further rotates 90 degrees in the direction of arrow B, and the relative position of the blanket cylinder shaft 12 relative to the blanket cylinder gear 18 is continuously increased. It is possible to adjust the position in the circumferential direction.

Further, the switch is further operated to control the drive circuit to stop the driving of the first solenoid 44a, and then the second solenoid 44b is driven to retract the first cam follower 42a, and the second cam 44a is retracted. The cam follower 42b is moved forward. This causes the teeth of the Geneva gear 30 rotating in the direction of arrow A to move the forwarded second cam follower 42b.
, The Geneva gear 30 rotates 90 degrees in the direction opposite to the arrow B about the axis. Therefore, contrary to the case where the above-mentioned first cam follower 42a comes into contact with the Geneva gear 30, the second timing pulley 34, the first timing pulley 32 connected to the second timing pulley 34 and the timing belt 36, and the worm 26. , And the worm wheel 22 rotate, the blanket barrel shaft 12 to which the worm wheel 22 is fitted and fixed is slightly moved in the direction opposite to the arrow D.

The Geneva gear drive mechanism 38 is mounted on a bearing 40 so as to be slidable in the axial direction as shown in FIG. 3, and is provided so as to come into contact with the teeth of the Geneva gear 30 when it is advanced. Two cam followers 46a, 46
b, a cam follower 48 for releasing, which is also mounted on the bearing 40 so as to be slidable in the axial direction, and a cam follower releasing mechanism including a slide plate 50, so that the cam followers 46a and 46b can be manually moved back and forth. Is also good.

In this way, by operating the switch of the Geneva gear drive mechanism 38, even when the printing machine is in operation,
Position adjustment of the blanket cylinder shaft 12 relative to the blanket cylinder gear 18 in the circumferential direction, that is, the blanket cylinder 1
Positional adjustment in the circumferential direction relative to zero of the impression cylinder 14 is possible.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, but the worm wheel is fixed to the blanket cylinder gear, and the worm is fixed to the blanket cylinder shaft. You may fix it. The transmission mechanism may be configured by using gears instead of the timing pulley and the timing belt. Further, the Geneva gear may be directly attached to the worm without using the transmission mechanism. The number of teeth of the Geneva gear may be five or more. It goes without saying that many modifications can be made without departing from the spirit of the invention, for example, the cam follower of the Geneva gear drive mechanism may be manually performed.

[0016]

When the upside-down image adjusting mechanism of the printing press according to the present invention is used, the Geneva gear driving mechanism is operated to operate the Geneva gear even when the printing press is operating. It is possible to rotate, and the relative circumferential position between the blanket cylinder shaft and the blanket cylinder gear can be changed by the worm gear mechanism, and the top-bottom image adjustment becomes possible. Further, according to the configuration of claim 2, the turning radius of the Geneva gear can be reduced, and the upside-down image adjusting mechanism can be made compact. According to the third aspect of the invention, the worm can be connected to the Geneva gear provided so as to be orthogonal to the axis of the blanket cylinder axis with a simple structure, and the top-and-bottom image adjustment mechanism can be realized more compactly and at low cost. It works.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of an upside-down adjusting device for a printing press according to the present invention, in which (a) is a partially cutaway front view,
(B) is a plan view and (c) is a side view.

2 is a plan view showing an example of the Geneva gear drive mechanism of FIG. 1. FIG.

3 is a plan view showing another example of the Geneva gear drive mechanism of FIG. 1. FIG.

[Explanation of symbols]

 10 Blanket Cylinder 12 Blanket Cylinder Shaft 18 Blanket Cylinder Gear 20 Worm Gear Mechanism 26 Worm 30 Geneva Gear 38 Geneva Gear Drive Mechanism

Claims (3)

[Scope of utility model registration request] 1. A blanket cylinder having a cylindrical shape, a blanket cylinder shaft provided coaxially with the blanket cylinder, axially protruding from an end surface of the blanket cylinder, and rotatable integrally with the blanket cylinder, and the blanket cylinder. A blanket cylinder gear that is fitted onto the shaft and is rotatable with respect to the blanket cylinder shaft and receives a rotational force, and is provided between the blanket cylinder shaft and the blanket cylinder gear. A vertical adjustment device for a printing machine, comprising: a blanket cylinder gear; and a worm gear mechanism for adjusting a relative circumferential position between the blanket cylinder shaft and the blanket cylinder gear. Geneva teeth that are provided on the gear and rotate the worm of the worm gear mechanism about its axis. While the Geneva gear rotates integrally with the blanket cylinder gear or the blanket cylinder shaft, it contacts the teeth of the Geneva gear to rotate the Geneva gear and rotate the worm about the axis. A top and bottom adjusting device for a printing press, comprising: a Geneva gear drive mechanism. 2. The printing machine according to claim 1, wherein the Geneva gear is provided so that its axis is orthogonal to the axis of the blanket cylinder axis, and is connected to the worm via a transmission mechanism. Upside down adjustment device. 3. The transmission mechanism includes a first timing pulley fixed to the worm coaxially with the worm, and a second timing pulley fixed to the Geneva gear coaxially with the Geneva gear.
3. The up-and-down adjusting device for a printing press according to claim 2, further comprising: a timing pulley according to claim 2, and a timing belt spanned between the first timing pulley and the second timing pulley.