JPH0464512B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a cylinder cleaning device for a printing press.
In particular, it relates to a cylinder cleaning device for a sheet-fed printing press.

[Conventional technology]

Examples of conventional cylinder cleaning devices for printing presses include (1) JP-A-63-37944, (2) JP-A-63-37945.
No., (3) JP-A-63-37946, and (4) JP-A-63-
There are issues such as No. 92456.

Among these, (1) proposes a cylinder cleaning device that uses a blade in place of the sponge cushions, air pads that use air pressure, or pressure rollers that were previously used as pressure devices.

(2) states that the blanket cylinder cleaning device of earlier sheet-fed printing machines could not be used for impression cylinder cleaning because there was no relief mechanism for the impression cylinder claw, and that the claws protruding from the surface of the impression cylinder It is proposed to use a cam plate to avoid contact between the parts and the cleaning cloth.

(3) is based on the same problem awareness as in (2) above, and is a mechanism that separates the cleaning device from the impression cylinder device using the claws in order to avoid contact between the claws protruding from the impression cylinder surface and the pressure welding device. is proposed.

(4) is based on the same problem awareness as in (2) above, and proposes the use of a cam plate to avoid contact between the claws protruding from the impression cylinder surface and the cleaning cloth, and further,
In addition to the blade, the mechanism for pressing the cleaning cloth against the impression cylinder includes a blade so that a part of the cleaning cloth pressed by the blade is in arcuate contact between the blade and the guide part along the impression cylinder surface. It is proposed to provide a guide section on the cleaning cloth take-up roll side.

[Problem to be solved by the invention]

In (1) above, since the blade is used, the pressure contact area is small, and the cleaning cloth can be moved with a small driving force even when it is in contact with the cylinder. The tip of the blade is shaped at an acute angle so that it can clean the vicinity of the protrusion, and in reality, it is thought that the driving force will not be so small. Furthermore, since the cylinder is removed using a portion of the cleaning cloth that has a small contact area that is pressed only by the tip of the blade, there is a risk that some parts will be left unextracted, and it cannot necessarily be said that the overall time required for cleaning can be shortened.

In addition, in (2), since the surface of the pawl relief cam and the tip of the blade are in contact only through the cleaning cloth, it is expected that the portion of the blade tip that comes into contact with the pawl relief cam will deteriorate quickly. . In order to increase the durability of the blade tip, it is desirable to provide the pawl relief cam in a portion that is not related to the life of the blade tip.

Furthermore, in (3), a detection method is shown for a mechanism in which the cleaning device is released by the claw portion while detecting the rotation of the impression cylinder, but a mechanism for actually releasing the cleaning device is not specified. Furthermore, regarding mechanisms for releasing the rotation of the impression cylinder without detecting it, a method using a pawl relief cam or other cam similar to the above example, and a method for releasing the impression cylinder at regular intervals are described. In this conventional example, as in (1), the cleaning cloth is brought into pressure contact with the cylinder only by the tip of the blade, so there is a similar drawback.

On the other hand, in (4), the cleaning effect is expected by bringing the cleaning cloth into contact with the cylinder between the blade and the guide part, but since it relies exclusively on the tension of the cleaning cloth, the cleaning effect is not that great. I couldn't get it.

All of these conventional examples employ complicated mechanisms and control devices that use air cylinders and the like to power the cleaning cloth winding mechanism, and are expensive and require a considerable amount of installation space. There were also no problems in terms of maintenance workability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cylinder cleaning device for a printing press in which a sufficient cylinder cleaning effect can be obtained by pressing a wide portion of a cleaning cloth.

[Means to solve the problem]

In order to achieve the above object, the present invention moves the cleaning cloth while supplying cleaning liquid to the cleaning cloth between a cleaning cloth supply roll and a take-up roll, presses the cleaning cloth against a cylinder with a pressure member, and closes the cylinder. In a cylinder cleaning device for a printing press to be cleaned, a pressing member includes a rigid blade having an acute tip that presses against a cylinder of a cleaning cloth, and a pressure member attached to a take-up roll side of the blade, which uses its own elasticity to push the cleaning cloth into the cylinder. A device for cleaning cylinders of printing presses is proposed, consisting of a pressure pad with a large surface against which it is pressed.

[Effect]

In the present invention, the pressing member includes a rigid blade with an acute tip that presses the cleaning cloth against the cylinder, and a wide surface that is attached to the winding roll side of the blade and presses the cleaning cloth against the cylinder by its own elasticity. Compared to the conventional combination of a blade and a guide part, which relies exclusively on the tension of the cleaning cloth, it is of course possible to clean from the part immediately behind the claw part.
The surface of the cylinder can be quickly and thoroughly cleaned by applying pressure to a wide area of the cleaning cloth.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing related mechanical parts of an embodiment of the cylinder cleaning device for a printing press according to the present invention, FIG. 2 is a plan view showing each part of the mechanism shown in FIG. 1, and FIG. FIG. 1 is a schematic diagram showing the winding operation of the cleaning cloth winding mechanism of the apparatus, and FIG.
FIG. 5 is a diagram showing an outline of the roll arrangement of an offset sheet-fed printing machine, FIG. 5 is a diagram showing a state in which the cleaning unit is in pressure contact during a cleaning operation, and FIG. 6 is a diagram showing a retracted state of the claw part during a cleaning operation. FIG. 7 is a diagram showing a state during non-washing (normal printing).

In FIG. 4, 1 is a plate cylinder, 6 is an inking device that supplies ink to the plate cylinder 1, and 5 is a dampening water device that supplies dampening water to the plate cylinder 1. The ink on the plate cylinder 1 is transferred to the blanket cylinder 2 and onto the printing paper which is fed from the intermediate cylinder 4 to the impression cylinder 3.

In this embodiment, the impression cylinder 3 will be explained as an example of the object to be cleaned by the cylinder cleaning device 10, but it goes without saying that the present invention can also be applied to the cleaning of the blanket cylinder 2.

In FIGS. 1 and 2, a cleaning device 10
The distal end thereof faces the impression cylinder 3, and is adapted to ride over the protrusion of the claw portion of the impression cylinder 3 by means of a cam attached to the side surface of the intermediate cylinder 4.

Side plate 11a of cylinder cleaning device 10
Stays 12 and 13 are fixed between and 11b, and a cleaning cloth supply roll 16 and a cleaning cloth take-up roll 17 are housed in the space between these stays 12 and 13. The cleaning cloth supply roll 16 and the cleaning cloth take-up roll 17 have respective shafts 16a and 16b.
The portions 17a and 17b can be removed from the side plates 11a and 11b, allowing used cleaning cloths to be replaced with new ones. The cleaning cloth 19 pulled out from the cleaning cloth supply roll 16 is guided by the cleaning cloth guide 18, and the cleaning cloth 19 is pulled out from the cleaning cloth supply roll 16, and is guided by the cleaning cloth guide 18,
The cleaning cloth then passes through the pressure pad 15 on the impression cylinder 3 side and is wound up on the cleaning cloth take-up roll 17 . The pressing blade 14a has an acute tip that presses the cleaning cloth 19 against the impression cylinder 3. The pressure welding pad 15 is fixed between the pressure welding blade 14a and the pressure welding blade rear frame 14b, and its tip expands in the direction of the impression cylinder 3 when not being cleaned, and deforms to the shape of the surface of the impression cylinder 3 when being cleaned, and expands its own strength. The cleaning cloth 19 is pressed against the impression cylinder 3 by its elasticity.

A lever 20 equipped with a one-way clutch 21 is provided at the portion where the shaft 17a of the cleaning cloth take-up roll 17 is attached. The lever 20 is connected to a spring hook attached to a mounting plate 33, which will be described later, and its own tip 20.
In FIG. 1, the tension spring 22 stretched between the tension spring 22 and the spring hook 24 placed at the point A is constantly pulled in the direction of the arrow C in FIG. Note that cleaning liquid is sprayed onto the cleaning cloth 19 from a spray bar 26 provided near the pressure contact blade 14a to wet the cleaning cloth 19.

The cleaning unit made of these members has a slide ball 30 equipped with a slide saddle 31, as shown in FIG. The cleaning unit is guided via a slide saddle 31 onto a guide bar 36 and a guide surface 37 of the adapter plate 32;
It can reciprocate in the direction of arrow A or B. Guide rod 36 is fixed between mounting plates 33 and 34, and mounting plates 33 and 34 are fixed to adapter plate 32. adapter plate 32
is fixed to the main body frame 7a or 7b with mounting screws 35.

On the other hand, a cam mounting screw 62 is provided on the side surface of the intermediate barrel 4.
A cam 60 whose position can be adjusted is attached. The cam 60 is located at a position where the cleaning cloth 19, the pressure welding blade 14a and the pressure welding pad 15 are prevented from coming into contact with the protrusion of the claw portion 3a on the impression cylinder 3, and the position where the pressure welding blade 14a and the pressure welding pad 15 are located at the cleaning cloth 19.
It is provided with cam surfaces 60a and 60b corresponding to the positions where the rollers are pressed against the impression cylinder 3, respectively.

A cam roller 42 attached to one end of a lever 40 supported by a support shaft 45 with a pin 41 is attached to the cam surface 6.
Contact occurs at 0a or 60b. At the other end of the lever 40 there is a driven roller 43 attached with a pin 44.
Piece 3 attached to the adapter plate 32
2a, the entire cleaning unit is moved in the direction of arrow A or B via side plate 11b.

A tip 40a of the lever 40 on the side of the intermediate barrel 4 is connected by a rotation shaft 52 to a knuckle 53 of an air cylinder 50 rotatably attached to the main body frame 7b. The air cylinder 50 includes a pressure spring 54 surrounding the cylinder rod 51, which is received by a pressure spring receiver 53a.

Note that a mechanism for adjusting the angle of both arms of the lever 40 may be provided at the portion where the lever 40 is attached to the support shaft 45. Further, the cams 60 may be provided at a plurality of positions corresponding to the number of installation positions of the claws of the impression cylinder 3 (in the example shown in FIG. 1, two positions in the diametrical direction).

The operation of the apparatus of this embodiment configured as described above will be explained next. Cam 60 attached to the side of intermediate cylinder 4
1 and 5 show the state immediately after the air cylinder 50 has climbed over the cam surface 60a of the air cylinder 50.
By biasing the cleaning unit in the direction of the arrow T, the cleaning unit is kept pressed in the direction of the impression cylinder 3 with a constant force. In this state, the pressure contact blade 14a presses the cleaning cloth 19 against the surface of the impression cylinder 3 from immediately after the claw part 3a of the impression cylinder 3 at point O.
Cleaning can be started from a position extremely close to the claw portion 3a,
There are very few parts left unextracted.

In addition, the pressure contact pad 15 is contracted from the expanded state in the direction of the impression cylinder 3 when not being cleaned, and is good for its own elasticity and strongly presses the cleaning cloth 19 against the surface of the impression cylinder 3 over a wide area. , a satisfactory cleaning effect can be obtained.

When the impression cylinder 3 and the intermediate cylinder 4 rotate and the cam roller 42 of the lever 40 rides on the protrusion contact avoidance position cam surface 60a of the next cam 60, the driven roller 43 at the other end of the lever 40 moves the cleaning unit in the direction of the arrow. 6, the tip of the pressure contact blade 14a is moved back from point O to point P, as shown in FIG.

The cleaning cloth winding operation at that time will be explained with reference to FIG. FIG. 3a shows the cleaning state.
From this state, even if the center of the cleaning cloth take-up roll 17 moves in the direction of arrow B, the tip 20a of the lever 20 is always pulled in the direction of arrow C by the tension spring 22, so as shown in FIG. As shown in the figure, it is always in contact with the stopper 25 fixed to the mounting plate 33. As a result, the cleaning cloth 19 is wound up by a predetermined amount corresponding to the amount of movement of the cleaning unit in the direction of arrow B. Thereafter, as the cam roller 42 of the lever 40 moves toward the cleaning cloth pressure contact position cam surface 60b, the cleaning unit returns in the direction of arrow A, and the lever 20 also returns in the direction of arrow D. At that time, since a one-way clutch 21 is provided at the part where the shaft 17a of the cleaning cloth take-up roll 17 is attached, only the lever 20 returns to its original position as shown in FIG. The cleaning cloth 19 remains as it is.

Then, the pressing blade 14a brings the cleaning cloth 19 into contact with a position immediately behind the claw portion 3a of the impression cylinder 3, and the pressing pad 15 also presses the cleaning cloth 19 against a relatively wide surface of the impression cylinder 3. The next wash begins.

This operation is repeated a predetermined number of times until the surface of the impression cylinder 3 regains its clean state.

Next, the operation after cleaning is completed will be explained.

When cleaning is completed, as shown in FIG. 7, press the air cylinder 50 in the direction of the arrow
0 in the clockwise direction in FIG. 1, and the tip of the pressure welding blade 14a is retracted from the position of point O to the position of point Q. In this position, the tips of the pressure contact blade 14a and pressure contact pad 15 of the cleaning unit are retracted to a position sufficiently far from the surface of the impression cylinder 3 as well as from the claw portion 3a. Therefore, cleaning cloth 1
This provides a space that allows for easy replacement of parts 9 and inspection of the cleaning unit. Although an example using an air cylinder is shown here, other actuators such as a push-pull solenoid may be used instead of this air cylinder.

In this embodiment, the pressure contact member is the cleaning cloth 19
A pressure contact blade 14a, which is a rigid body and has an acute tip, presses the cleaning cloth 19 against the impression cylinder 3, and a pressure contact pad 15, which is attached closer to the take-up roll 17 than this blade and presses the cleaning cloth 19 against a wide area of the impression cylinder 3 by its own elasticity. Compared to the conventional combination of a blade and a guide part that relies solely on the tension of the cleaning cloth, it is possible to clean from the part immediately behind the claw part 3a, and the pressure is applied by pressing the wide part of the cleaning cloth 19. A sufficient cleaning effect of the body 3 can be obtained.

Further, a mechanism for reciprocating the pressing members 14a and 15 between a position where the cleaning cloth 19 is pressed against the impression cylinder 3 and a position where the protrusion of the claw portion 3a of the impression cylinder 3 and the cleaning cloth 19 are avoided; Intermediate cylinder 4 rotates synchronously with
A cam 60 that is attached to and regulates the width and timing of the reciprocating motion of the pressure contact members 14a and 15, a lever 40 that connects this cam 60 and the reciprocating motion motor, and a lever 40 that is attached to the cleaning device through the lever during cleaning. While the member is held in the cleaning cloth pressing position, the lever 40 is rotated during the rest period to press the pressing member 14a,
Air cylinder 5 for retracting 15 to the cleaning rest position
0, the pressure contact members 14a, 15
When avoiding contact with the protrusion of the claw portion 3a of the impression cylinder 3, there is no need for the cam 60 to ride on the cam 60, etc., thereby fundamentally eliminating the risk of deterioration.

Furthermore, the cleaning cloth take-up roll 17 is rotated by a reciprocating position between a position where the cleaning cloth 19 is pressed against the impression cylinder 3 and a position where the protrusion of the claw part 3a of the impression cylinder 3 and the cleaning cloth 19 are avoided, A mechanism for winding up the cleaning cloth 19 step by step is provided, and there is no need to provide a special drive source such as a dedicated air cylinder to the cloth winding mechanism.

〔Effect of the invention〕

According to the present invention, there is provided a cylinder cleaning device for a printing press that can obtain a sufficient cylinder cleaning effect using a wide area of the cleaning cloth.

[Brief explanation of drawings]

FIG. 1 is a side view showing related mechanical parts of an embodiment of the cylinder cleaning device for a printing press according to the present invention;
The figure is a diagram showing each part of the mechanism as shown in Figure 1.
FIG. 3 is a schematic diagram showing the winding operation of the cleaning cloth winding mechanism of the apparatus shown in FIG. 1, FIG. 4 is a diagram schematically showing the roll arrangement of the offset sheet-fed printing machine, and FIG. A diagram showing the pressure-contact state of the cleaning unit.
FIG. 6 is a diagram showing a retracted state of the claw portion during a cleaning operation, and FIG. 7 is a diagram showing a state during non-cleaning (normal printing). 1... Plate cylinder, 2... Blanket cylinder, 3... Impression cylinder, 3a... Claw portion, 4... Intermediate cylinder, 5... Dampening device, 6... Inking device, 7a, 7b... Main body Frame, 10... Cylinder cleaning device, 11a,
11b...Side plate, 12, 13...Stay, 14a...Pressure blade, 14b...Pressure blade rear frame, 15...Pressure pad, 16...Cleaning cloth supply roll, 16a, 16b...Cleaning cloth supply roll Shaft, 17...Washing cloth take-up roll, 17
a, 17b...Cleaning cloth take-up roll shaft, 18...
...Washing cloth guide, 19...Washing cloth, 20...Lever, 20a...Lever tip, 21...One-way clutch, 22...Tension spring, 23, 24...
... Splash, 25... Stopper, 26... Spray bar, 30... Slide ball, 31... Slide saddle, 32... Adapter plate, 32a
...Block, 33, 34...Mounting plate, 35...Mounting screw, 36...Guide rod, 37...Guide surface, 40
... Lever, 40a ... Lever tip, 41 ... Pin, 42 ... Cam roller, 43 ... Followed roller, 44
... Pin, 45 ... Support shaft, 50 ... Air cylinder, 51 ... Cylinder rod, 52 ... Rotating shaft,
53...Natsukuru, 53a...Press spring receiver, 5
4...Press spring, 60...Cam, 60a...Protrusion contact avoidance position cam surface, 60b...Cleaning cloth pressure contact position cam surface, 62...Cam mounting screw.

Claims (1)

[Claims] 1. Moving the cleaning cloth while supplying cleaning liquid to the cleaning cloth between a cleaning cloth supply roll and a take-up roll,
A cylinder cleaning device for a printing press that cleans the cylinder by pressing the cleaning cloth against the cylinder using a pressure contact member, wherein the pressure contact member includes a rigid blade having an acute tip for pressing the cleaning cloth against the cylinder; A cylinder cleaning device for a printing press, characterized in that the pressure pad is attached to the take-up roll side and has a wide surface that presses the cleaning cloth against the cylinder by its own elasticity.