JP3000535B2 - Printing machine cylinder cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a cylinder of a printing machine by pressing a cleaning cloth against the cylinder.

[0002]

2. Description of the Related Art In general, this type of apparatus comprises a pair of roll-shaped cloth guides rotatably supported in contact with the peripheral surface of a cylinder, a cloth supply shaft for supplying a cleaning cloth to these cloth guides, and a cloth guide. And a cloth take-up shaft having a take-up driving means for taking up the cleaning cloth from above. The cleaning cloth is intermittently taken up from the cloth supply shaft to the cloth take-up shaft by the take-up driving means, and the peripheral surface of the cylinder is slid. This cleans the peripheral surface of the cylinder. In this case, if the cleaning cloth is wound on the downstream side of the cylinder, there is a possibility that the cleaning cloth may be caught in the cylinder, and it is necessary to take measures on the cloth supply side so that the cleaning cloth is not pulled out except at the time of winding.

[0003] As a countermeasure against this, Japanese Patent Laid-Open No.
There is an apparatus disclosed in 20349. The device disclosed herein includes a ratchet wheel attached to the shaft end of the cloth supply shaft, a pawl engaged with the pawl wheel, an air cylinder for attaching and detaching the pawl to and from the ratchet wheel, and a pawl separated from the ratchet wheel. The cloth supply shaft is provided with a rotation stopping mechanism including a spring that biases the cloth supply shaft. When the cleaning cloth is wound on the cloth winding shaft, the winding driving means of the winding shaft is driven in a state where the pawl is separated from the ratchet wheel by the biasing force of the spring, and the winding is performed. In other cases, the pawl is engaged with the ratchet wheel by the operation of the air cylinder against the urging force of the spring, and the rotation of the cloth supply shaft is prevented to prevent the cleaning cloth from being pulled out.

[0004]

However, in the above-described conventional apparatus, an air cylinder as a dedicated driving means for driving the rotation stopping mechanism is required in addition to the winding driving means. Since both drive means operate individually, a means for interlocking them is required, which results in a disadvantage that the whole apparatus becomes large, the operation becomes complicated, and a smooth operation cannot be obtained. Therefore, the present invention has been made in view of the above-mentioned conventional drawbacks, and the object of the present invention is to reduce the size of the entire apparatus and obtain a smooth operation of preventing the cleaning cloth from being wound up and pulled out. To provide a cleaning device for a cylinder of a printing machine.

[0005]

In order to achieve this object, a cylinder cleaning device for a printing machine according to the present invention comprises a cleaning cloth which abuts and slides on a peripheral surface of a cylinder, and a cloth winder which winds the cleaning cloth. A take-up shaft, a cloth supply shaft for supplying a cleaning cloth, a ratchet coaxially mounted on the cloth supply shaft, a locking member engaging / disengaging with the pawl, and the cloth take-up shaft. An actuated member coupled by a one-way clutch and mounted coaxially with the take-up shaft; and actuating the actuated member to wind the cleaning cloth onto the cloth take-up shaft and actuating the locking member. It comprises an engaging member for disengaging the engaging member and the ratchet wheel.

[0006]

In the present invention, the locking member is normally locked to the ratchet wheel to prevent the cleaning cloth from being caught by the cylinder, and the rotation restriction of the cloth supply shaft is released with the operation of the operating member. At the same time, the cleaning cloth is wound by the cloth winding shaft.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1A and 1B show a cylinder cleaning device for a printing machine according to the present invention, in which FIG. 1A is a side view, FIG. 1B is a diagram showing a state in which a cleaning cloth is wound, FIG. FIG. 6B is a diagram showing the start of the winding of the cleaning cloth, and FIG. In these figures, the reference numeral 2 denotes a blanket cylinder in contact with an impression cylinder (not shown), and a roll-shaped cloth guide 3 rotatably supported between frames (not shown) on the peripheral surface of the blanket cylinder 2. 4 is in contact. A cleaning cloth 6 is stretched between the cloth guides 3 and 4 so as to be pressed against the peripheral surface of the blanket cylinder 2. The cleaning cloth 6 is supplied from a cloth supply shaft 8 and is wound up by a not-shown. The cloth is wound on the cloth winding shaft 14 which is driven to rotate by the driving means.

Reference numeral 10 denotes a ratchet having a claw 10a formed on the peripheral surface thereof, which is mounted coaxially with the cloth supply shaft 8 so that the rotation of the cloth supply shaft 8 in the direction in which the cleaning cloth 6 is fed is prevented. Is connected to the cloth supply shaft 8 by a one-way clutch. Using the shaft 14a of the cloth winding shaft 14 as a swing axis,
A substantially U-shaped swinging lever 18 is swingably supported, and the swinging lever 18 and the cloth take-up shaft 14 are connected by a one-way clutch 15.
Can be rotated only in the direction in which the cleaning cloth 6 is wound.

A contact block 19 is attached to one end of the swing lever 18, and a roller 20 is provided on the back surface of the other end. The tip of a rod 26 of an air cylinder 25 as an actuator is connected to the abutment block 19, and the swing lever 18 is moved by the rod 26 that can be moved forward and backward from the air cylinder 25.
It swings about the shaft 14a.

Reference numeral 30 denotes a substantially T-shaped locking lever.
1 is supported so as to be swingable around the center, and one end of the ratchet 1
Claw portion 3 which engages with claw 10a of No. 0 and prevents rotation of cleaning cloth 6 of ratchet wheel 10, ie, rotation counterclockwise in the figure.
0a is provided, and the upper end surface is provided with a cam surface 30b on which the roller 20 of the swing lever 18 slides.
1, the clockwise direction in the figure, that is, the claw portion 30a
Is rocked in the direction of engagement with the pawl 10a of the ratchet wheel 10.

Reference numeral 34 denotes a swinging lever which is swingable about a shaft 34a. A stopper pin 35 and a roller 36 are mounted on one end of the lever, and the lever 36 is always rotated so that the roller 36 comes into contact with the cloth winding shaft 14. A swinging behavior is provided in a clockwise direction, and when the winding diameter of the cloth winding shaft 14 becomes large, the swinging lever 34 swings counterclockwise, and accordingly, the stopper pin 35 moves counterclockwise. Thus, the swing amount of the swing lever 18 is regulated to be small, the winding amount is adjusted, and a constant cleaning cloth can always be wound regardless of the winding diameter.

The apparatus for cleaning a cylinder of a printing machine according to the present invention is configured as described above, and the operation will be described below. During the cleaning of the blanket cylinder 2, in order to wind up the dirty cleaning cloth via the cloth guides 3 and 4 and to feed out a new cleaning cloth,
By operating the air cylinder 25, the rod 26 is advanced. As the rod 26 advances, the swing lever 18 swings counterclockwise. At this time, the swing lever 18
Since the winding shaft 14 is connected by the one-way clutch 15 so as to be rotatable counterclockwise, the cleaning cloth 6 wound on the winding shaft 14 is not pulled out to the blanket cylinder 2 by ink tack or the like. It can be wound up.

When the swing lever 18 swings counterclockwise, the roller 20 slides on the cam surface 30 b of the locking lever 30, causing the locking lever 30 to move counterclockwise against the urging force of the compression spring 33. 2C, the pawl 30a is separated from the pawl 10a of the ratchet wheel 10, the engagement between the pawl 30a and the pawl 10a is released, and the ratchet wheel 10 is released, as shown in FIG. Can be rotated. The ratchet wheel 10 includes a cloth supply shaft 8.
When the pawl 30a and the pawl portion 10a are engaged with each other, the cleaning cloth 6 is not pulled out. The shaft 8 rotates counterclockwise with the ratchet wheel 10, the cleaning cloth 6 is pulled out, a new cleaning cloth is supplied, and the shaft 8 is wound around the winding shaft 14.

When the rod 26 has been advanced, FIG.
As shown in the figure, the swing lever 18 comes into contact with the stopper pin 35, and the winding of the cleaning cloth 6 is completed.
Starts to retreat, the swing lever 18 swings clockwise, and accordingly, the locking lever 30 also starts swinging clockwise due to the restoring force of the compression spring 33. When the roller 20 is disengaged from the cam surface 30b, the claw 30a of the locking lever 30 is engaged with the claw portion 10a of the ratchet wheel 10, and is connected to the ratchet wheel 10 so that it cannot rotate counterclockwise. Clutch 11
As a result, the rotation of the cloth supply shaft 8 is stopped, and it is impossible to pull out the cleaning cloth 6 other than the cloth winding. The above operation is repeated by intermittently performing the advance and retreat of the rod 26.

In this embodiment, the cylinder to be cleaned with the cleaning cloth 6 is the blanket cylinder 2. However, the present invention is not limited to this. The cylinder can be applied to other printing cylinders or rotating rollers. Further, the cleaning cloth 6 is transferred to the pair of roll cloth guides 3,
4, the contact is made to abut on the peripheral surface of the blanket cylinder 2. However, the present invention is not limited to this. For example, the contact may be made with a pad, and various design changes are possible. Further, the interlock between the swing lever 18 and the locking lever 30 is performed by the roller 20 and the cam surface 30b. However, the present invention is not limited to this. For example, the two may be connected by a link mechanism. Instead of the pin 18, for example, a pinion may be mounted on the cloth winding shaft 14, the rod 26 may be provided with a rack that meshes with the pinion, and the locking lever 30 may be directly connected to the rod 26. In this case, the pinion and the pinion Lock lever 30
Does not swing freely, and the spring 33 for urging the locking lever 30 is not required. It goes without saying that a rotary actuator can be used as the actuator instead of the air cylinder 26 as the operating member. In addition, although the ratchet wheel 10 is connected to the cloth supply shaft 8 via the one-way clutch 11, it goes without saying that the same operation and effect can be obtained even if they are integrally connected.

[0016]

As described above, according to the present invention, a cleaning cloth which abuts and slides on the peripheral surface of a cylinder, a cloth winding shaft for winding the cleaning cloth, and a cloth supply shaft for supplying the cleaning cloth. A ratchet wheel coaxially mounted with the cloth supply shaft; a locking member engaging and disengaging with the ratchet wheel; and a one-way clutch connected to the cloth take-up shaft and coaxial with the take-up shaft. An actuated member mounted on the shaft, and the actuated member is actuated to wind the cleaning cloth onto the cloth winding shaft, and the actuating member is actuated to disengage the engaging member and the ratchet wheel. Since the actuating member for taking up the cloth take-up shaft is also used as the actuating member for canceling the rotation regulation of the cloth supply shaft, a dedicated actuating member is not required. And a single actuating member Supply and take-up of the cleaning cloth in association with the operation is performed, Thus, the effect of the winding and withdrawal operation of the prevention of smooth cleaning cloth in association operation is obtained.

[Brief description of the drawings]

FIGS. 1A and 1B show a cleaning device for a cylinder of a printing machine according to the present invention, wherein FIG. 1A is a side view and FIG.

FIG. 2 shows an operation state of a cleaning device for a cylinder of a printing machine according to the present invention, wherein FIG.
(B) is an operation diagram of the completion of the winding of the cleaning cloth.

[Explanation of symbols]

 2 blanket cylinder 6 cleaning cloth 8 cloth supply shaft 10 hook wheel 14 cloth take-up shaft 18 swing lever 20 roller 26 actuator 30 locking lever 30b cam surface

Claims (1)

(57) [Claims] 1. A cleaning cloth abutting and sliding on a peripheral surface of a cylinder, a cloth winding shaft for winding the cleaning cloth, a cloth supply shaft for supplying the cleaning cloth, and a shaft mounted coaxially with the cloth supply shaft. A driven ratchet wheel, a locking member that engages and disengages with the ratchet wheel, an actuated member coupled to the cloth winding shaft by a one-way clutch and axially mounted on the winding shaft, The operation member is actuated to wind the cleaning cloth onto the cloth winding shaft, and the actuating member is actuated to actuate the engaging member to disengage the ratchet wheel. Cylinder cleaning device for printing machines.