JPH0215646Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handwheel device for an offset printing press, and more particularly to an interlocking mechanism between a driving shaft and a handwheel shaft.

In general, the above-mentioned printing presses are equipped with a handwheel so that the drive shaft can be manually rotated to make it convenient for checking, for example, the transfer status and printing status of the blanket cylinder, but conventionally The handwheel shaft is fixed to a driving shaft that is pivotally supported on the frame, and the gear on the driving shaft transmits rotational force to the machine, and the driving shaft is interlocked with the drive motor via an appropriate power transmission mechanism. When the drive motor is connected and the machine is rotated by the drive motor, the drive motor is stopped and the machine is rotated by manually operating the handwheel. Even if the handwheel rotates,
During printing operations, it was extremely dangerous as the operator would come into contact with the handwheel and his/her clothes would get caught in it.

Therefore, as a result of consideration in view of the above-mentioned conventional circumstances, the present invention was developed by configuring the drive shaft and handwheel shaft to be released when the machine is driving and rotating, and to be connected when the machine is stopped. A handwheel device for an offset printing press is provided which aims to improve work safety during printing without impairing operability.

The present invention will be described below in detail based on the illustrated embodiment. As shown in FIG. 1, a driving shaft 3 is rotatably supported on a frame 1 of a printing machine via a bearing 2. One end passes through the frame 1 and projects outward.

A gear 4 is fixed to the drive shaft 3, and the rotational force of the drive shaft 3 is transmitted to the printing machine by the gear 4.

A bracket 5 is fixed to the outside of the frame 1 with bolts 6, and a handwheel shaft 8 is rotatably attached to the bracket 5 via a bearing 7 on the same axis as the drive shaft 3, and It is supported by preventing movement in the direction.

Gears 9 and 10 having the same number of teeth are fixedly installed at opposing ends of the drive shaft 3 and the handwheel shaft 8, respectively, so as to face each other.

Here, the handwheel shaft 8 has a handwheel 8a at the outer end, and a small diameter portion 8b is formed at the center of the tip, and the small diameter portion 8b is connected to the gear 9 of the driving shaft 3.
The driving shaft 3 and the handwheel shaft 8 are supported through a bearing 11 in a recess 9a formed in the center thereof so that they can freely rotate with respect to each other. It is designed to be able to reliably rotate on the same axis as the driving shaft 3 without core rotation.

Further, a stud shaft 12 is fixed to the bracket 5 in parallel with the driving shaft 3 and the handwheel shaft 8 by tightening a nut 13.
An idle gear 14 is fitted into the shaft so that it can rotate on the shaft and slide in the axial direction.

The tooth width of the idle gear 14 is set to correspond to the tooth width of the two gears 9 and 10, and by meshing with the two gears 9 and 10, the rotational force of the handwheel shaft 8 is transferred to the gear. 10, idle gear 14,
The signal is transmitted to the driving shaft 3 via a gear 9.

Further, the idle gear 14 is mounted on the stud shaft 12 with its end supported on the side surface of the gear and the bracket 5.
It is elastically biased to the left in the figure by a spring 15 externally mounted on the shaft, and is normally engaged with both gears 9 and 10 as shown in the figure, and a retainer 16 provided at the end of the shaft.
This prevents the stud from coming off the stud shaft 12.

Also, a groove 17 is provided at one end of the idle gear 14.
As shown in FIGS. 2 to 5, a pin 19 protruding from one end of the arm 18 formed in a substantially V-shape is slidably engaged with the arm 18. The other end is the link 20 and the drive source 2
1 and is connected by a pivot joint. The above Am 18 is
Attach the screw 22 to the bracket 5 with the bent part.
It is pivotally connected to a mounting plate 23 fixed by a fulcrum shaft 24 such as a shoulder screw, and when the drive shaft 21 is actuated, the idle gear 14 is moved toward the right in FIG. 1 against a spring force. The handwheel shaft is slid to disengage the drive shaft gear 9 and mesh only with the gear 10 of the handwheel shaft.

Here, as the drive source 21, a normal solenoid whose actuator moves linearly, a rotary solenoid, a hydraulic or pneumatic cylinder, a torque motor, etc. are used.

The illustrated example shows a case where a solenoid is used as the drive source 21, and FIGS. 2 and 3 show a type in which the actuator 22 is pushed toward the arm 18 side when energized, and FIGS. This shows a type in which the actuator 22 operates in the direction of pulling the arm 18.

Also, when using the above solenoid, this is ON.
Alternatively, the solenoid may actuate the idle gear 14.
Since the idle gear 14 may be operated by turning OFF, the spring 15 is provided to correspond to the above operation.

In Figures 2 to 5, 25 is a switch that is turned on and off by the operation of the drive source 21, that is, a solenoid in the case shown, to drive the machine and connect the drive shaft 3 and handwheel shaft 8. Or, it is set up to determine the timing of release,
Since it is also possible to use a timer in place of the switch 25, the switch 25 is not an essential element in the configuration.

Next, some examples of operation when a solenoid is used as the drive source 21 in the present device will be described below.

When the drive motor switch of this machine (printing machine) is turned on, the solenoid turns off and idle gear 1 is turned off.
4 to disengage the gear 9. At this time, the switch 25 is turned on, the machine drive motor is turned on, and the machine is driven and rotated.

When the machine drive motor switch is turned off,
The machine drive motor turns OFF and the timer turns ON. At this time, the machine, which had been rotating due to inertia, stops, and then, when the timer times up, the solenoid turns on, causing the idle gear 14 to slide and mesh with the gear 9.

The above is a case where the switch 25 is used,
By using a timer instead of this switch, it can be operated as follows.

When the machine drive motor switch is turned on, the solenoid turns off and the timer turns on at the same time.
At this time, the idle gear 14 is slid and disengaged from the gear 9, and when the timer times up, the machine drive motor is turned on and the machine is driven and rotated.

Also, the same applies when the drive motor switch of the machine is turned off.

When the machine drive motor switch is turned on, the solenoid is turned on, the idle gear 14 is slid and disengaged from the gear 9, and the machine drive motor is turned on.

When the machine drive motor switch is turned OFF, the machine drive motor is turned OFF or the timer is turned ON. At this time, the machine, which was rotating due to inertia, stops.

When the timer times up, the solenoid is turned off and the idle gear 14 is biased by the spring 15 and slides into mesh with the gear 9.

As explained above, the handwheel device of the present invention is configured and operates, so when the machine is driven and rotated, the drive shaft 3 and the handwheel shaft 8 are disconnected, and the drive motor of the machine is disconnected. When the switch is OFF, the drive source 21 is OFF and the driving shaft 3 and the handwheel shaft 8 are connected, so during the drive rotation of the machine, the handwheel shaft 8 stops and does not rotate, but the handwheel shaft 8 rotates. It is possible to avoid accidents such as contact accidents and accidents where clothes get caught in the machine, which can improve work efficiency and worker safety, without impairing the manual rotation operability of the machine. .

In addition, according to the present invention, the drive source 21 is turned off and the idle gear 14 meshes with the drive shaft gear 9 when the machine drive motor switch is turned off, so that the machine can be operated even during a power outage. This has the effect of allowing manual rotation operation.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing a handwheel device of an offset printing press according to the present invention, Fig. 2, Fig. 3
Figures 4 and 5 are side views of parts of other embodiments of the same handwheel device. 3... Driving shaft, 8... Hand wheel shaft, 9...
Gear on the drive shaft side, 10... Gear on the handwheel shaft side, 12... Stud shaft, 14... Idle gear, 21... Drive source.

Claims (1)

[Scope of utility model registration request] The driving shaft 3 and the handwheel shaft 8 are arranged on the same axis, and the idle gear 14 can be rotated around the stud shaft 12 and slid freely in the axial direction so as to be able to mesh with the gears 9 and 10 attached to the opposite ends of each. Install a solenoid or other appropriate drive source 21 so that the idle gear is in mesh with the gear of the handwheel shaft and can be arbitrarily engaged or disengaged with the drive shaft gear.
1. A handwheel device for an offset printing press, characterized in that the handwheel device is configured to be slidably operated.