JPH0335551Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a handwheel device for a small offset printing press, and more particularly to a movement mechanism of a driving shaft and a handwheel shaft.

[Conventional technology]

In general, the above-mentioned printing presses are equipped with a handwheel device so that the driving shaft can be manually rotated, making it convenient for checking and inspecting the transfer and printing conditions of the blanket cylinder, for example. . Such conventional handwheel devices either directly connect the driving shaft and the handwheel shaft, or, as illustrated in FIG. , are meshed with each other with an idle gear 11 interposed between them, and when checking the above-mentioned transfer state etc., the printing press drive motor is stopped and the handwheel 10a is manually operated to start the printing press. It's rotating.

[The problem that the idea attempts to solve]

However, in the conventional handwheel device of a printing press, the driving shaft 3 and the handwheel 10a are always connected via each gear, so even during printing when the printing press is driven and rotated by the drive motor, the handwheel 10a is Since the wheel 10a rotates, there has been a problem in that it is very dangerous during printing work, such as when the operator comes into contact with the hand wheel 10a or when clothes get caught in the hand wheel 10a.

Further, for example, Japanese Utility Model Application Publication No. 55-90447 discloses another conventional handwheel device for a printing press having a structure in which rotational transmission of the handle is interrupted by a friction clutch. However, this conventional device requires two solenoids, and when the handwheel is rotated, a relief force acts on the gear, so the spring requires a large force, so the solenoid requires a large force. The problem was that the capacity had to be increased. Furthermore, the operating mechanism of this conventional device holds the operating lever by fitting the lock lever into a notch provided in the operating lever, so the holding of the gear tends to become unstable due to wear of the notch. The lock is easily dislodged due to vibrations during machine operation, which is dangerous, and since the handwheel itself is moved up and down, it is difficult to operate and has poor operability.

The present invention has been made to solve such problems, and an object thereof is to obtain a handwheel device for a printing press that can simplify the structure and improve operability and work safety during printing.

[Means to solve the problem]

A handwheel device for a printing press according to the present invention includes a driving shaft gear of a driving shaft, a handwheel gear provided on the handwheel shaft, and an idle gear that transmits rotation of the driving shaft gear to the handwheel gear. A handwheel device for a printing press includes an annular groove provided in any one of the handwheel gear, an idle gear, and a driving shaft gear, and a first pin that engages with the annular groove, and an arm that engages or disengages the one gear by moving; a link that engages with a second pin formed on the arm; a switch pin connected to the link; and a drive that moves the switch pin forward and backward. source and
The device is equipped with a main drive motor switch that is activated when the switch pin comes into contact with the switch pin.

[Function and Examples]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a handwheel device for a printing press according to the present invention will be described below with reference to FIGS. 1 to 6.

FIGS. 1 to 4 are diagrams showing a first embodiment of the above-mentioned handwheel device.
A driving shaft 3 is provided with a gear 4 via a bearing 2.
is rotatably supported, and its gear 4 transmits the rotational force of the driving shaft 3 to the machine, and a driving shaft gear 5 is disposed at the end extending outward through the frame 1. has been done.

Further, a stud shaft 6 is provided on the frame 1 and protrudes in parallel with the driving shaft 3.
A handwheel shaft 10 is rotatably supported on a bracket 7 fixed to the frame 1 via bearings 8 and 9, respectively, and parallel to the drive shaft 3 and stud shaft 6. A handwheel 10a identical to that shown in FIG. 7 is fixed at the end.

Further, an idle gear 11 and a handwheel gear 12 are disposed on the stud shaft 6 and the handwheel shaft 10, respectively, and are meshed with each other. The idle gear 11 is rotatably fitted to the stud shaft 6 to prevent axial movement, while the handwheel gear 12 is slidable in the axial direction on the handwheel shaft 10 by means of a key 13 and a keyway 14. and is integrally rotatably engaged with the handwheel shaft 10 in the axial direction, and the drive shaft gear 5 and the idle gear 11 are always meshed, and the handwheel The gear 12 can be engaged or disengaged by a sliding operation.

Here, the slidable handwheel gear 12 is slidably operated by a drive source 17, which will be described later.
A compression spring 25 is interposed between the handwheel gear 12 and the spring receiver 10b fixed to the handwheel shaft 10 so that the handwheel gear 12 and the idle gear 2 are reliably held in the meshing position with the associated idle gear 11. An annular groove 16 is provided around one end of the handwheel gear 12 so that the handwheel gear 12 engages with and slides on a first pin 19a, which will be described later.

As the drive source 17 for slidingly operating the handwheel gear 12, a solenoid, a hydraulic or pneumatic cylinder, a rotary solenoid, a torque motor, etc. are applied, but in the illustrated example, a solenoid 17a is used, and the handwheel gear This is a case where 12 is made to slide. To explain this based on the drawings, as shown in FIGS. 2 to 4, the solenoid 17a is fixed to the frame 1 in a position approximately perpendicular to the handwheel shaft 10, and on the other hand,
A bent portion of an arm 19 bent into a substantially L-shape is pivotally attached to the bracket 18 so as to be swingable about a fulcrum shaft 20, and one end of the arm 19 is connected to an actuator 17b of a solenoid 17a via a link 21. and a first pin 19a protruding from the other end is slidably engaged in the annular groove 16 of the handwheel gear 12,
Arm 1 is turned on and off by turning on and off the solenoid 17a.
9 swings back and forth about the fulcrum shaft 20, thereby sliding the handwheel gear 12 in the axial direction via the first pin 19a, and the idle gear 1
It is provided so as to be engaged with or disengaged from 1.

One end of the link 21 is pivotally connected by a switch pin 22 that engages with the actuator 17b of the solenoid 17a and is moved forward and backward by the drive source 17, while the other end is provided with a long hole 21a. A second pin 19b protruding from one end of the arm 9 is slidably engaged with the switch pin 2.
2 and the second pin 19b of the arm 19 is a tension spring 23 for protecting the solenoid. The swinging motion of the arm 19 is caused by the tension spring 2
This is done through 3. That is, solenoid 17
When the switch pin 22 moves and pulls or pushes the tension spring 23 due to the ON/OFF operation of a, the second pin 19 is moved through the elastic force of the tension spring 23.
b moves forward and backward, and the arm 19 swings. By transmitting power through the tension spring 23 in this manner, a high load is not applied to the solenoid 19a, thereby preventing its burnout. The elongated hole 21a is provided to protect the solenoid 17a from burning out if the handwheel gear 12 does not move due to some trouble. That is, if the handwheel gear 12 does not slide in the axial direction due to the torque, and therefore the second pin 19b is in a stationary state together with the arm 19, even if the solenoid 17a is turned ON or OFF,
Since the elongated hole 21a is movable relative to the second pin 19b, the link 2 together with the actuator 17b
1 moves forward and backward in the longitudinal direction within the range of the elongated hole 21a to prevent an excessive load from being applied to the solenoid 17a.

The bracket 18 is provided with a machine drive motor switch 24 for operating the machine drive motor, and when the switch pin 22 that moves forward and backward comes into contact with the actuator 24a of the switch 24, the machine drive motor switch 24 is activated. is about to be activated. Here, switch the machine drive motor switch 2.
4 is ON, solenoid 17a is OFF or
Turn ON to release the mesh of gears 12 and 11, or turn on the machine drive motor switch 24.
When turned OFF, solenoid 17a turns ON or OFF
The gear 12 is set in advance to mesh with the gear 11, and the machine drive motor switch 24 and the solenoid 17a are electrically connected.

In other words, the machine stops and solenoid 17a
When turned ON, the arm 19 is swung as shown in FIG. 3, and the handwheel gear 12 slides against the spring force of the compression spring 25 and meshes with the idle gear 11 as shown in the figure. The rotational force of the handwheel 10a is the handwheel shaft 10,
It is transmitted to the driving shaft 3 via the handwheel gear 12, the idle gear 11, and the gear 5.

Next, when the machine drive motor switch 24 is turned ON, the solenoid 17a is turned OFF, and the handwheel gear 12 is slid to the position shown in FIG. At the same time as the switch is released, the switch pin 22 contacts the actuator 24a, the switch 24 is actuated, and the machine drive motor is started.

In other words, when the machine is driving and rotating, the drive shaft 3 and the handwheel shaft 10 are disconnected, and only when the machine is stopped, the drive shaft 3 and the handwheel shaft 10 are coupled. It will be done.

The gear 12 that is slid and the gear 11 that engages or disengages with the gear 12 has chamfered side surfaces so that the gears 12 and 11 can mesh smoothly with each other.

As explained above, in the handwheel device of the printing press according to the first embodiment, the drive shaft 3 and the handwheel shaft 10 are disconnected when the machine is driving and rotating, and the drive shaft 3 and the handwheel shaft 10 are connected only when the machine is stopped. By connecting the handwheel shafts 10, it is possible to manually rotate the machine without impairing operability, and it also prevents accidents due to contact or clothing getting caught when the handwheel 10a rotates when the machine is rotating. This can be avoided and the safety of printing operations can be improved. In addition, it is divided into three axes: a driving shaft 3, an idle gear shaft 6, and a handwheel shaft 10.
In addition, since they are arranged in parallel, the entire device can be made thin and does not protrude outward from the machine frame 1, making it easier to operate the printing machine. Because it can be separated,
During printing, it is possible to prevent deterioration in printing accuracy due to rotational shaking of the handwheel 10a, etc.

FIG. 5 is a diagram showing a second embodiment of the present invention. In this embodiment, the driving shaft gear 5 and the handwheel gear 12 are fixed to the shafts 3 and 10, respectively. The idle gear 11 is made slidable. In this case, the idle gear 11 is rotatably and slidably inserted into the stud shaft 6, and from the illustrated state in which it meshes with both gears 5 and 12, it can be slid to the right in the figure to The mesh with the gear 5 is released, but the mesh with the handwheel gear 12 is maintained at all times.

FIG. 6 shows a third embodiment of the present invention. In this embodiment, the idle gear 11 and the handwheel gear 12 are held in position with respect to the respective shafts 6 and 10, and , the driving shaft gear 5 of the driving shaft 3
is engaged with the driving shaft 3 by means of a key and a keyway so as to be slidable in the axial direction, and can be slid to engage or disengage from the idle gear 11.

Here, in both the second and third embodiments, the slidable gears (gear 11 in the second embodiment, gear 5 in the third embodiment) are slidably operated by the drive source 17. In both the second and third embodiments, there is a gap between the frame 1 and the idle gear 11 or the driving shaft gear 5 so that the gear 11 or 5 is reliably held in the meshing position with the associated gear 5 or 11. A compression spring 25 is interposed between each gear, and when the gear 11 or 5 is disengaged from the associated gear,
A stopper 15 is fixed to the end of each shaft 6 or 3 to prevent the shaft from coming off and to position the shaft. Further, an annular groove 16 is provided around one end of the gear 11 or 5, respectively, so that the gear 11 or 5 slides while engaging with the first pin 19a. Also, in the second and third embodiments, as in the first embodiment, the gear 11 or 5 is slidably operated, and the gear 5 is engaged or disengaged with the gear 11 or 5.
Or 11 has a chamfered side surface and gear 1
1 and 5 are designed to mesh smoothly with each other. Note that the other configurations of the second and third embodiments are the same as those of the first embodiment, and produce the same effects as the first embodiment.

[Effect of idea]

Since the handwheel device of the printing press according to the present invention is constructed as described above, only one driving source is required, and the driving source only needs to have a small capacity, so the structure can be simplified, and Since only a small force is required to move the gear having the annular groove, smooth operation is possible.

In addition, the gears can be reliably engaged and disengaged, and the gears can be held stably. Therefore, the gears do not engage during operation, and work safety can be ensured.

Furthermore, since the gear is slid by swinging the arm, the gear is easy to operate and has good operability.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the handwheel device according to the present invention, in which FIG. 1 is a longitudinal sectional plan view, FIG. 2 is a side view, and FIG. 3 is a plan view thereof. Figure 4 is a plan view with the driving shaft and handwheel shaft released, Figure 5 is a partially cutaway plan view of the second embodiment of the device, and Figure 6 is a plan view of the device. FIG. 7 is a partially cutaway plan view of the third embodiment, and FIG. 7 is a longitudinal sectional plan view illustrating a handwheel device of a conventional printing press. 3... Driving shaft, 5... Gear of driving shaft, 10...
Handwheel shaft, 11...Idle gear, 12...
...Handwheel gear, 16...Annular groove, 17...
Drive source, 19... Arm, 19a... First pin, 19b... Second pin, 21... Link, 2
2... Switch pin, 24... Machine drive motor switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A hand for a printing press that includes a driving shaft gear of a driving shaft, a handwheel gear provided on a handwheel shaft, and an idle gear that transmits rotation of the driving shaft gear to the handwheel gear. The wheel device has an annular groove provided in any one of the handwheel gear, the idle gear, and the driving shaft gear, and a first pin that engages with the annular groove, and by swinging. an arm that engages or disengages the one gear; a link that engages with a second pin formed on the arm; a switch pin connected to the link; a drive source that moves the switch pin forward and backward; 1. A handwheel device for a printing press, comprising a machine drive motor switch that is activated by contact with a switch pin.