JPH0468149B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a cylinder cleaning device for a sheet-fed printing press, and particularly to a structure that eliminates the need for an active drive source for a cleaning cloth winding mechanism. It is.

[Prior Art] In sheet-fed printing machines, in order to prevent ink from adhering to the outer circumferential surface of cylinders such as impression cylinders and staining the printing paper, the outer circumferential surface of the cylinder is A cylinder cleaning device is provided to clean the cylinder. Some cylinder cleaning devices use a cleaning cloth. This cleaning cloth is wound up in a predetermined amount in order to thoroughly clean the outer peripheral surface of the cylinder.
The new, clean portion of the cleaning cloth was now pressed against the cylinder.

In conventional cylinder cleaning equipment, for example,
As described in Japanese Unexamined Patent Publication No. 148164/1983, a cleaning cloth winding mechanism is driven by an active drive source using an air cylinder or the like.

[Problems to be Solved by the Invention] In the conventional printing press cylinder cleaning device described above, an active drive source such as an air cylinder is used to drive the cleaning cloth winding mechanism.
For example, the number of air cylinders and related parts increases, and space is required to install them.

Another disadvantage is that a pipe or the like must be routed from the printing press body to the cylinder cleaning device in order to supply air to the air cylinder attached to the cylinder cleaning device which is detachable from the printing press body.

Furthermore, it is necessary to provide a control device that operates the air cylinder in synchronization with the rotational phase of the cylinder, resulting in the problem that the entire device becomes complicated.

An object of the present invention is to provide a cylinder cleaning device for a sheet-fed printing press that does not require an active drive source dedicated to a cleaning cloth winding mechanism, requires fewer parts, and can significantly save installation space.

[Means for Solving the Problem] The above object is achieved by providing a means for converting the movement of the cleaning cloth of a cylinder cleaning device using the cleaning cloth into pressure contact with and separation from the outer periphery of the cylinder into the driving force of the cleaning cloth winding mechanism. achieved.

That is, in order to achieve the above-mentioned object, the present invention has claws that protrude from the outer circumferential surface in order to grasp the ends of a sheet-like member such as a sheet of paper, and the outer circumference is provided to avoid the claws of a rotating cylinder. Cleaning is performed in a cylinder cleaning device for a sheet-fed printing press that includes a cleaning unit that detaches one end from the surface, winds up a predetermined amount of cleaning cloth, presses the cleaning cloth against the outer peripheral surface after the claw has passed, and cleans dirt from the cylinder. The purpose of the present invention is to propose a cylinder cleaning device for a sheet-fed printing press that is equipped with means for converting the movement of the unit away from the outer peripheral surface of the cylinder or the movement of the unit back to the cleaning cloth pressure contact position into a driving force for the cleaning cloth winding means. .

Specifically, the cleaning unit is automatically supported in a swinging manner so that the cleaning end of the cleaning cloth is pressed against and separated from the cylinder circumferential surface, and a cam device is provided that swings the cleaning unit by the rotation of the cylinder. A gear is connected to the cleaning cloth take-up roll in the cleaning unit via a one-way clutch, and a segment gear is fixed to the frame side of the printing press, meshing with the gear and rotating the gear by the swinging of the cleaning unit. be.

[Function] In the present invention, the cleaning unit is oscillated via the cam device by the rotation of the cylinder, and this oscillation causes the cleaning cloth to be pressed against and separated from the cylinder circumferential surface, and the oscillation also causes the gear and segment gear to interact. The mesh winds up the cleaning cloth.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the automatic impression cylinder cleaning apparatus according to the present invention in a state in which the cleaning unit is in pressure contact with the cleaning unit during a cleaning operation, and FIG. be.

In these figures, 2 is the side plate of the impression cylinder cleaning device 8 as a cleaning unit, 3 is the intermediate cylinder, 4 is the impression cylinder as the cylinder to be cleaned, 4a is the impression cylinder recess, and 6a is the front edge 4b of the impression cylinder recess. A pawl 10a is fixed to a pawl shaft 6b near the pawl shaft 6b, is rotatable about the pawl shaft 6b, and holds the edge of the sheet between it and the surface of the impression cylinder 4; 10b is a pressure blade front frame that presses against the outer peripheral surface; 10b is a pressure blade rear frame; 12 is a pad that is sandwiched between the pressure blades 10 and presses the cleaning cloth 20 against the outer peripheral surface; 14 is a cleaning cloth supply roll; 16 is a cleaning cloth winder. The roll 18 is a guide rod for the cleaning cloth.

Reference numeral 24 denotes a rotary shaft that swingably supports the impression cylinder cleaning device 8, and both ends of the rotary shaft are supported by a frame (not shown) of the main body of the printing press. Reference numeral 26 indicates a lever that is attached to a rotating shaft 36 supported on the main body frame of the printing press and rotates the impression cylinder cleaning device 8 around the rotating shaft 24. Reference numeral 30 is attached to the lever 26 via a pin 28 and is connected to a cam 50, which will be described later. A cam roller 34 is a pin 3 that contacts and rotates the lever 26 according to the position of the claw 6a.
A link 40 is connected to the lever 26 by a pin 38 and transmits the movement of the lever 26 to the side plate 2 of the impression cylinder cleaning device 8; a link 40 is connected to one end of the lever 26 by a pin 48;
A spring 50 is fitted around 2 and maintained in a compressed state by a spring receiver 46, and 50 is a cam fixed to the intermediate barrel 3 by a bolt 52, with the cam roller 30 abutting the cam crest 50a or cam trough 50b. be.

74 is an air cylinder that largely moves the impression cylinder cleaning device 8 between the cleaning position and the non-cleaning position, one end of which is attached to the frame of the printing press body by a bolt 84 and a bracket 86; 76 is its rod; 78 is the rod head; 80 numeral 82 is a long hole for not hindering the action of the lever 26 to avoid the claw 6 in the cleaning position, and 82 is a pin that is installed in the lever 26 and slides inside the long hole 80.

In the present invention, the impression cylinder cleaning device 8 is detached from the outer peripheral surface of the impression cylinder 4 at one end to avoid the claws 6.
In order to enable the cleaning cloth take-up roll 16 to wind up a predetermined amount of the cleaning cloth 20 by utilizing the action of returning the cleaning cloth to the position where the cleaning cloth is pressed against the impression cylinder 4 after passing through the As shown, a gear 58 is provided at the tip of the shaft of the cleaning cloth take-up roll 16 via a one-way clutch 60. On the other hand, a segment gear 62 that meshes with the gear 58 is attached to the printing press body frame with bolts 64 and 66.

The operation of the embodiment of the present invention configured as described above will be explained.

In FIG. 1, which shows a state in which the impression cylinder recess 4a soon reaches the position directly below the pressure welding blade 10, the cam roller 30 attached to one end of the lever 26 is moved to the cam 5.
0, but has not yet reached the cam peak 50a, so the impression cylinder cleaning device 8
is in the most clockwise direction in the rotation range around rotation 24, and the center of the cleaning cloth take-up roll 16 is at the position of point A. In this state, the pressure contact blade 10 and the pressure contact pad 12 press the cleaning cloth 20 against the outer peripheral surface of the impression cylinder 4 and clean this outer peripheral surface.

When the impression cylinder 4 rotates and the impression cylinder concave portion 4 a comes to be directly below the pressure welding blade 10 , the cam roller 30 on the lever 26 moves to the cam 5 attached to the intermediate cylinder 3 .
0, and rotate the lever 26 clockwise. Accordingly, the impression cylinder cleaning device 8 is rotated counterclockwise about the rotating shaft 24 via the link 34, and the cleaning cloth take-up roll 1 is rotated counterclockwise through the link 34.
6 moves to the position of point B. During,
Gear 58 meshing with segment gear 62 rotates clockwise. This rotation is transmitted to the cleaning cloth take-up roll 16 via the one-way clutch 60, and the cleaning cloth 20 is wound up by a predetermined amount. Second
The figure shows the situation. Note that the pin 82 inserted into the long hole 80 of the rod head 78 of the air cylinder 74 only moves within the long hole 80 within the range in which the cleaning cloth take-up roll 16 moves from point A to point B. , the air cylinder 74 does not have any adverse effect on the operation of the impression cylinder cleaning device 8 to avoid the claw 6 and the operation of returning to the cleaning position.

The impression cylinder cleaning device 8 that has reached the state shown in FIG. Since the lever 26 is rotated counterclockwise by the force of the spring 40, it is rotated clockwise about the rotating shaft 24 until the center of the cleaning cloth take-up roll 16 reaches the position A. During this process, the gear 58 meshing with the segment gear 62 rotates counterclockwise, but this rotation is not transmitted to the cleaning cloth take-up roll 16 due to the action of the one-way clutch 60. Therefore, the cleaning cloth 20 is maintained in a wound state, and the outer peripheral surface of the impression cylinder 4 can always be cleaned with a clean portion of the cleaning cloth 20.

In this way, this embodiment is equipped with a mechanism that converts the movement of the impression cylinder cleaning device away from the cylinder outer circumferential surface or the movement of the pressure cylinder cleaning device back to the cleaning cloth pressing position into a driving force for the cleaning cloth take-up roll. There is no need to provide a power source such as an air cylinder dedicated to winding up the cleaning cloth, and the configuration of the impression cylinder cleaning device is simplified and made compact, leading to cost reduction.

Further, in the above embodiment, a method was described in which the impression cylinder cleaning device 8 winds up the cleaning cloth 20 by an operation that avoids the claws 6, but the cleaning cloth is used and the cleaning cloth is pressed against and separated from the outer periphery of the cylinder. The present invention can also be applied to cleaning devices for other cylinders such as impression cylinders, as long as the cylinder cleaning device has a structure in which the portion of the cleaning cloth that is soiled by the cleaning action is transferred.

[Effects of the Invention] As is clear from the above description, according to the present invention, the cleaning unit is swingably supported, the cleaning unit is oscillated by the rotation of the cylinder via the cam device, and this oscillation is caused by the rotation of the cylinder. The cleaning cloth is pressed against and separated from the cylinder circumferential surface, and the cleaning cloth is wound up by the meshing of the swinging gear and the segment gear, so there is no need to provide a dedicated power source for winding up the cleaning cloth. Therefore, the configuration of the cleaning device is simplified, and it is also downsized and costs are reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the automatic cylinder cleaning device according to the present invention in a state in which the cleaning unit is in pressure contact during a cleaning operation, and FIG. 2 is a diagram showing a state in which the device shown in FIG. 1 is in a state where the claw part is avoided during a cleaning operation. . 2... Side plate, 3... Intermediate body, 4...
Impression cylinder, 4a...Impression cylinder recess, 4b...Recess front edge, 6
a...claw, 6b...claw shaft, 8...impression cylinder cleaning device,
10... Pressure welding blade, 12... Pressure welding pad, 1
4...Cleaning cloth supply roll, 16...Cleaning cloth take-up roll, 18...Guide rod, 20...Cleaning cloth, 24
...Impression cylinder cleaning device rotation shaft, 26...Lever, 2
8, 32, 38, 48... Pin, 30... Cam roller, 34... Link, 36... Lever rotating shaft, 4
0... Spring, 42... Rod, 44... Rod head, 46... Spring receiver, 50... Cam, 50a...
...Cam peak, 50b...Cam valley, 52...Bolt, 58...Gear, 60...One-way clutch, 62...Segment gear, 74...Air cylinder, 76...Rod, 78...Rod head Part, 8
0...Long hole, 82...Pin, 84...Bolt, 8
6...Bracket.

Claims (1)

[Claims] 1. A device for cleaning the outer circumferential surface of a rotating cylinder having claws protruding from the outer circumferential surface to grasp the edges of sheet-like members such as sheets of paper, which are once separated from the outer circumferential surface in order to avoid the claws. At the same time, in a cylinder cleaning device for a printing press equipped with a cleaning unit that winds up a predetermined amount of cleaning cloth and presses the cleaning cloth against the outer peripheral surface after the claws have passed, the cleaning end of the cleaning cloth is against the cylinder peripheral surface. The washing unit is swingably supported so as to be pressed into contact with and separated from the washing unit, and a cam device is provided which swings the washing unit by the rotation of a cylinder. A cylinder cleaning device for a printing press, characterized in that a segment gear is fixed to a frame side of the printing press, the segment gear meshing with the gear and rotating the gear by the swinging of the cleaning unit.