JPH0623746U - Upside down adjustment device for printing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an up-and-down adjustment device for a printing machine, which enables fine adjustment even while the printing machine is in operation. [Structure] Blanket cylinder 10 and blanket cylinder 10
A blanket barrel shaft 12 projecting from the end face of the blanket barrel shaft, and a blanket barrel gear 18 externally fitted to the blanket barrel shaft 12.
A vertical adjustment device for a printing machine, comprising a worm gear mechanism 20 provided between the blanket cylinder shaft 12 and the blanket cylinder gear 18 for adjusting relative positions of the blanket cylinder shaft 12 and the blanket cylinder gear 18 in the circumferential direction. A Geneva gear 30 for rotating the worm 26 of the worm gear mechanism 20, which is provided on the body shaft 12 or the blanket body gear 18, about its axis, and a Geneva gear 3
0 is blanket body gear 18 or blanket body axis 1
And a Geneva gear drive mechanism 38 for rotating the Geneva gear 30 by contacting the teeth of the Geneva gear 30 to rotate the worm 26 around the axis while rotating integrally with 2. The top-bottom adjustment device of the printing machine which is a feature.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vertical adjustment device for a printing press.

[0002]

[Prior art]

 Conventionally, an example of an upside-down device for a printing press is disclosed in Japanese Utility Model Laid-Open No. 58-7653. The top-bottom adjustment of the printing machine is to change the circumferential phase between the impression cylinder and the blanket cylinder with ink on the surface, and the printing start position when printing characters and patterns on paper etc. To fine tune. The top-bottom adjuster of this printing press is a cylindrical blanket cylinder, a blanket cylinder coaxial with the blanket cylinder, and a blanket cylinder shaft that projects from the end face of the blanket cylinder in the axial direction and is rotatable integrally with the blanket cylinder. , A blanket cylinder gear that is fitted onto the blanket cylinder axis and is rotatable with respect to the blanket cylinder axis, and receives the rotational force from the impression cylinder gear, and a worm wheel that is externally fitted and fixed to the blanket cylinder axis. , A worm that is fixed to the blanket body gear and meshes with the worm wheel, a plurality of gear groups that have adjustment gears that are provided to rotate the worm, and a frame that is rotatably provided and adjusted. Adjustable knob that can be connected to the gear for adjusting the relative circumferential position of the blanket cylinder shaft and the blanket cylinder gear Those comprising an adjustment mechanism. Therefore, when changing the position of the blanket cylinder shaft in the circumferential direction with respect to the blanket cylinder gear, the printing press 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 multiple gear groups, so the worm can be rotated by rotating the adjustment knob by hand, and the blanket cylinder shaft becomes the blanket cylinder gear via the worm wheel. In contrast, it can rotate in the circumferential direction.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned conventional top-bottom adjusting device for a printing press has the following problems. Since the top-bottom adjustment device of the printing press has the above-described structure, the adjustment gear is also rotated during the operation of the printing press, and the adjustment knob cannot be connected. If the adjustment knob could be connected, the adjustment knob would rotate with the adjustment gear, but if the rotation of the adjustment knob is manually suppressed, the rotation of the adjustment gear will also be suppressed, and the adjustment gear will not rotate. The worm rotates relative to the gear, and the worm is rotationally driven to change the relative circumferential positions of the blanket cylinder shaft and the blanket cylinder gear.However, it is not possible to change the position by exactly a predetermined amount. There is a problem that you cannot do it. 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 device for a printing machine, which enables fine adjustment even while the printing machine is in operation.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has the following configuration. That is, a cylindrical blanket cylinder, a blanket cylinder that is provided coaxially with the blanket cylinder and that projects from the end surface of the blanket cylinder in the axial direction and that is rotatable integrally with the blanket cylinder, and that is external to the blanket cylinder axis. The blanket cylinder shaft is fitted between the blanket cylinder shaft and the blanket cylinder gear, which is rotatable with respect to the blanket cylinder shaft and receives rotational force. A blanket cylinder gear, and a worm gear mechanism that adjusts the relative position of the blanket cylinder shaft and the blanket cylinder gear in the circumferential direction. Geneva which is provided on the blanket body gear and rotates the worm of the worm gear mechanism about its axis. While the car and the Geneva gear are rotating integrally with the blanket cylinder gear or the blanket cylinder shaft, the Geneva gear is rotated by contacting the teeth of the Geneva gear to rotate the Geneva gear around the axis. And a Geneva gear drive mechanism for rotating the same.

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

[0006]

[Action]

 The blanket cylinder shaft and the blanket cylinder gear are connected between the blanket cylinder shaft and the blanket cylinder gear that are provided coaxially with the blanket cylinder and can rotate integrally with each other. A worm gear mechanism that adjusts the position in the relative circumferential direction is provided, and a blanket cylinder shaft or a blanket cylinder gear is provided with a Geneva gear that rotates the worm of the worm gear mechanism about its axis. Further, while the Geneva gear is rotating integrally with the blanket cylinder gear or the blanket cylinder shaft, it contacts the teeth of the Geneva gear and rotates the Geneva gear to rotate the worm about the axis Geneva gear drive Since the mechanism is installed, the Geneva gear drive mechanism is operated during the operation of the printing machine to rotate the Geneva gear. 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. If the Geneva gear is installed so that its axis is orthogonal to the axis of the blanket cylinder axis and is connected to the worm via the transmission mechanism, the radius of rotation of the Geneva gear can be reduced, and the transmission mechanism can be moved to the worm and coaxial with the worm. The first timing pulley fixed to the Geneva gear, the second timing pulley fixed to the Geneva gear coaxially with the Geneva gear, and the first timing pulley and the second timing pulley. When it is composed of a timing belt, it has a simple structure and is provided so that the axis of the Geneva gear is orthogonal to the axis of the blanket cylinder axis.

[0007]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1A and 1B are views showing an upside-down adjusting device of a printing machine according to the present embodiment, where FIG. 1A is a partially cutaway front view, FIG. 1B is a plan view, and FIG. FIG. 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. First, the configuration will be described. The top-bottom adjusting device of the printing machine is provided coaxially with the cylindrical blanket cylinder 10 and the blanket cylinder 10, and is provided so as to project in the axial direction from the end face of the blanket cylinder 10 and is rotatable integrally with the blanket cylinder 10. The blanket cylinder shaft 12 and the blanket cylinder shaft 12 are fitted onto the blanket cylinder shaft 12 and are rotatable with respect to the blanket cylinder shaft 12, and mesh with the impression cylinder gear 16 fixed to the side surface of the impression cylinder 14. The rotating blanket cylinder gear 18 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 to each other. And a worm gear mechanism 20 that adjusts the relative position in the circumferential direction. The worm gear mechanism 20 includes a worm wheel 22 fitted and fixed to the blanket cylinder shaft 12 and a worm 26 rotatably provided to a worm holder 24 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.

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

Further, while the Geneva gear 30 rotates integrally with the worm holder 24 fixed to the blanket cylinder gear 18, the Geneva gear 30 comes into contact with the teeth of the Geneva gear 30 on the side of the Geneva gear 30. A Geneva gear drive mechanism 38 that rotates the gear 30 to rotate the worm 26 about the axis is provided in the frame 28. As shown in FIG. 2, the Geneva gear drive mechanism 38 is fixed to the frame 28 together with the first and second cam followers 42 a and 42 b mounted on the bearing 40 so as to be slidable in the axial direction. It has first and second solenoids 44a and 44b, which are mounted on a support (not shown) and are connected to one end sides of the cam followers 42a and 42b, and switches (not shown). A drive circuit (not shown) that drives the solenoids 44a and 44b. 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. When the cam followers 42a and 42b move forward, the side surfaces of the cam followers abut the side surfaces of the teeth of the Geneva gear 30. , To prevent the Geneva gear 30 from rotating.

Next, the operation will be described. First, the switch is set so that the solenoids 44a and 44b are retracted, and the printing machine is operated. As a result, when the impression cylinder gear 16 rotates, the blanket cylinder gear 18 meshing with the impression cylinder gear 16 rotates in the direction of the arrow A, and the worm 26 provided on the worm holder 24 fixed to the blanket cylinder gear 18 also includes the blanket. Body axis 12 Rotates around the axis. Further, since the worm wheel 22 meshing with the worm 26 rotates together with the worm 26 by the automatic tightening, 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 axis of the blanket cylinder shaft 12 so that the axis thereof rotates in a plane perpendicular to the axis of the blanket cylinder shaft 12.

Next, the switch is operated to control the drive circuit to drive the first solenoid 44a to advance the first cam follower 42a. When the teeth of the Geneva gear 30 rotating in the arrow A direction come into contact with the advanced first cam follower 42a, the Geneva gear 30 rotates 90 degrees in the arrow B direction around the axis. 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 by the second timing pulley 34 and the timing belt 36 rotate. Since the worm 26 rotates about its axis in the direction of arrow C, the worm wheel 22 and the blanket barrel shaft 12 to which the worm wheel 22 is fitted and fixed is slightly moved in the direction of arrow D by a predetermined angle. When the Geneva gear 30 again rotates to the position of the first cam follower 42a and 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 blanket cylinder 12 of the blanket cylinder shaft 12 continuously. Positional adjustment in the circumferential direction relative to the gear 18 is possible.

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 to move the second solenoid 44a. The cam follower 42b is moved forward. As a result, when the teeth of the Geneva gear 30 rotating in the direction of the arrow A come into contact with the advanced 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 first cam follower 42a comes into contact with the Geneva gear 30, the second timing pulley 34, the second timing pulley 34 and the first timing pulley 32 connected by 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 slightly moves in the direction opposite to the arrow D.

Further, 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 provided so as to come into contact with the teeth of the Geneva gear 30 when it is advanced. Two cam followers 46a and 46b, 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, are used to manually operate the cam followers 46a and 46b. You may make it move forward and backward.

As described above, by operating the switch of the Geneva gear drive mechanism 38, relative position adjustment of the blanket cylinder shaft 12 with respect to the blanket cylinder gear 18 in the circumferential direction can be performed even when the printing machine is in operation. That is, the position of the blanket cylinder 10 relative to the impression cylinder 14 can be adjusted in the circumferential direction.

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. The Geneva gear may be directly attached to the worm without using the transmission mechanism. The Geneva gear may have five or more teeth. Of course, the cam follower of the Geneva gear drive mechanism may be manually modified, and many modifications can be made without departing from the spirit of the invention.

[0016]

[Effect of device]

 By using the top-and-bottom image adjustment mechanism of the printing press according to the present invention, according to the configuration of claim 1, even when the printing press is in operation, the Geneva gear is rotated by operating the Geneva gear driving mechanism. The worm gear mechanism allows the relative positions of the blanket barrel shaft and the blanket barrel gear in the circumferential direction to be changed, enabling top-and-bottom image adjustment. 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. Further, according to the structure of claim 3, the Geneva gear and the worm, which are provided so as to be orthogonal to the axis of the blanket cylinder axis, can be connected with a simple structure, and the top-and-bottom image adjusting mechanism can be realized as a single layer compact and at low cost. It is very effective.

[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 adjustment device for a printing press according to claim 2, further comprising: the timing pulley of claim 1 and a timing belt spanned between the first timing pulley and the second timing pulley.