JPH0215645Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small-sized 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, which is convenient for checking, for example, the transfer status and printing status of the blanket cylinder. As illustrated in Fig. 1, the printing press has a handwheel c fixed to a driving shaft b which is rotatably supported by a frame a, and a gear d of the driving shaft b transmits rotational force to the machine. The shaft b is interlocked with the drive motor via an appropriate power transmission mechanism (not shown), and when performing the above-mentioned inspection etc., the drive motor is stopped and the machine is rotated by manually operating the handwheel c. However, since the handwheel c is directly connected to the driving shaft b,
Since the handwheel c rotates even during printing when the machine is rotated by the drive motor, there is a possibility that the operator may come into contact with the handwheel c or clothing may get wrapped around it during printing work. It was dangerous.

Therefore, as a result of studies 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. An offset printing machine is provided which aims to improve work safety during printing without impairing manual operability.

The present invention will be described in detail below based on the illustrated embodiment. As shown in FIGS. 2 to 4, a driving shaft 3 is rotatably supported on a frame 1 of a printing machine via a bearing 2. One end of the frame 1 extends outward through the frame 1.

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 driving shaft 3 and the handwheel shaft 8, respectively, so as to face each other.

Here, the handwheel shaft 8 is provided with a handwheel 8a at the outer end, and a small diameter portion 8b at the center of the tip.
The small diameter portion 8b accommodates the bearing 1 in a recess 9a recessed in the center of the gear 9 of the driving shaft 3.
1, the driving shaft 3 and the handwheel shaft 8 are supported so that they can freely rotate with respect to each other, so that the handwheel shaft 8 is coaxial with the driving shaft 3 without eccentric rotation due to the two-point support. The core allows for reliable 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 nuts 13 and 14, and an idle gear 15 is rotated on the stud shaft 12 and rotates in the axial direction. It is slidably inserted into the

The tooth width of the idle gear 15 is provided so as to face the tooth width of both the gears 9 and 10, and is meshed with the two gears 9 and 10, so that the rotational force of the handwheel shaft 8 is transferred to the gear. 10, an idle gear 15, and a gear 9 to be transmitted to the driving shaft 3.

Further, the idle gear 15 is connected to the stud shaft 12.
One end is supported by a spring receiver 16 fixed to the end of the stud shaft 12, and the other end is supported in the axial direction by a spring 17 interposed in contact with one end of the idle gear 15. 8 gear 10
It is elastically biased in the direction in which the driving shaft 3 is always engaged with the gear 9, that is, in the direction in which the driving shaft 3 is disengaged from the gear 9.

Also, a groove 18 is provided at one end of the idle gear 15.
is provided around the periphery, and a protruding pin 20 is engaged with one end of an arm 19 formed in a substantially V-shape.
The other end of the arm 19 is connected to the solenoid 2 by a link 21.
It is pivotally connected to the second actuator 22a. The arm 19, with its bent portion, is pivotally connected to a mounting plate 24 fixed to the bracket 5 with screws 23 by a fulcrum shaft 25 such as a stepped screw, and the solenoid 22 is turned on. By sliding the idle gear 15 against the spring force,
Both the gears 9 and 10 mesh as shown in FIG.
The spring 17 is disengaged from the gear 9 of the handwheel shaft 8 and engaged only with the gear 10 of the handwheel shaft 8 as shown in FIG.
It acts to slide the to one side as described above.

Further, the solenoid 22 is connected to the bracket 5.
The stud shaft 12 is fixed to a fixed mounting plate 26 using a tightening nut 14.
The switch 27 is fixedly mounted on the mounting plate 24 with the switch 27 set in a preset position so that when the switch is turned OFF, the actuator 22a operates the actuator 27a of the switch 27 and starts the machine drive motor (not shown). .

Now, turn on the switch (not shown) that turns on and off the power to the drive motor of this machine, and when the motor is energized, the solenoid 2
The power to the solenoid 22, the machine drive motor, and the above switch 27 are cut off and turned OFF, which activates the switch 27 as described above to start the machine drive motor and rotate the printing machine. are electrically connected.

That is, when the machine is being rotated by the machine drive motor, the idle gear 15 and the gear 9 of the driving shaft 4 do not mesh with each other, so that the handwheel shaft 8 is not rotated.

The gear 9 and the idle gear 15 have side end surfaces 9b and 15 to prevent improper meshing and to ensure smooth meshing.
5a is chamfered.

Since the offset printing machine of the present invention is configured as described above, when the machine is driven and rotated by the drive motor, the solenoid 22 is turned OFF.
By operating, the gear 9 of the driving shaft and the idle gear 15 are disengaged, and the handwheel shaft 8a
does not rotate, and if the machine is stopped, the solenoid 22 is turned on and the drive shaft 13, each gear 9, 10 of the handwheel shaft 8, and the idle gear 15 are turned on.
By being meshed, the handwheel shaft 8 and the driving shaft 3 are connected, and the driving shaft 3 can be rotated manually using the handwheel 8a, so the machine can be manually rotated without impairing operability. Since the handwheel 8a stops and does not rotate while the machine is rotating, it is possible to avoid accidents caused by the rotation of the handwheel 8a, such as contact accidents or accidents involving clothing.
This has the effect of increasing workability and operator (worker) safety.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view showing the handwheel section of a conventional offset printing press, Fig. 2 is a longitudinal cross-sectional side view of the handwheel section of the offset printing press according to the present invention, and Fig. 3 is a front view of the handwheel section. Fig. 4 is a bottom view of the handwheel section, Fig. 5 is a bottom view of the same handwheel section, and Fig.
The figure is a longitudinal sectional side view showing the gear meshing state of the handwheel section during rotation of the machine. 4...Driving shaft, 8...Handwheel axis, 9,
10... Gear, 12... Stud shaft, 15... Idle gear, 22... Solenoid.

Claims (1)

[Scope of utility model registration request] Gears 9 and 10 are respectively attached to opposite ends of the driving shaft 4 and the handwheel shaft 8 disposed on the same axis as the driving shaft, and meshed with both gears to rotate the idle gear 15 to the stud shaft 12. The solenoid is installed so that it can be slid in the axial direction by a solenoid 22, and the solenoid turns OFF when the drive motor switch of this machine is turned ON, and slides the idle gear in the direction of disengaging the driving shaft gear. An offset printing machine characterized in that it is electrically connected to the above-mentioned switch.