JPH0464513B2 - - 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, the present invention relates to a structure that eliminates the need for an active drive source for a cleaning cloth winding mechanism.

[Conventional technology]

Printing machines are equipped with a cylinder cleaning device that cleans the outer circumferential surface of the cylinder between printings in order to prevent ink from adhering to the outer circumferential surface of cylinders such as impression cylinders and staining the printing paper. It is being Some cylinder cleaning devices use a cleaning cloth. In order to thoroughly clean the outer circumferential surface of the cylinder, the cleaning cloth is wound up a predetermined amount during the cleaning operation, and the newly clean portion of the cleaning cloth is pressed against the cylinder.

In a conventional cylinder cleaning device, a cleaning cloth winding mechanism is driven by an active drive source using an air cylinder or the like, as described in, for example, Japanese Patent Application Laid-open No. 148164/1983.

[Problem 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, so for example, the number of air cylinders and related parts increases. , space is required to install these.

Furthermore, in order to supply air to an air cylinder that drives a cylinder cleaning device that is removably attached to the printing press body, a pipe or the like must be routed from the printing press body to the cylinder cleaning device.

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.

In order to solve these problems, the applicant proposed in Japanese Patent Application No. 1-138520 that the reciprocating movement of the cleaning unit between the cylinder cleaning position and the detachment position from the cylinder is controlled by a gear and a rack. We have proposed a cylinder cleaning device equipped with a means to convert the rotational force into the rotational force of the cleaning cloth winding shaft, but gears and racks are difficult to reduce manufacturing costs, and installing the rack requires a certain amount of space. I needed it.

In addition, with conventional winding means that rotates the cleaning cloth winding shaft in fixed angle increments, the diameter of the winding increases as the cleaning cloth is wound up, resulting in excessive winding of the cleaning cloth, resulting in wasted cleaning cloth. There were also problems.

The first object of the present invention is to provide a cylinder cleaning device for a printing press that does not require an active drive source dedicated to the cleaning cloth winding mechanism, requires a small number of parts, significantly saves installation space, and is low-cost. It is to provide.

A second object of the present invention is to provide a cylinder cleaning device that can always wind up a cleaning cloth by a constant size regardless of the winding diameter of the cleaning cloth.

[Means to solve the problem]

In order to achieve the above first object, the present invention has the following features:
The cleaning cloth sent out from the cleaning cloth supply roll is brought into pressure contact with the outer circumferential surface of a rotating cylinder to wash away dirt, and once removed from the outer circumferential surface of the cylinder, the dirty cleaning cloth is removed from the cleaning cloth winding shaft, which has a means for preventing reverse rotation. In a cylinder cleaning device for a printing press that includes a cleaning unit that repeats the operation of winding up a part of the cleaning cloth and cleaning the dirt by re-compressing the cleaning part of the cleaning cloth on the outer peripheral surface, the cylinder is fixed to a winding shaft and is attached to the outer periphery of the cleaning unit. A cleaning cloth winding lever that converts the movement of separating from the surface or returning to the cleaning cloth pressing position into a rotational movement of the cleaning cloth winding shaft via a reversal prevention means, and a cleaning cloth winding lever that protrudes into the movement area of the cleaning cloth winding lever. The present invention proposes a cylinder cleaning device for a printing press that includes a pin that is fixed to a fixed member on the printing press main body side and abuts on a cleaning cloth winding lever to wind up the cleaning cloth.

In order to achieve the above second object, the present invention has the following features:
The cleaning cloth sent out from the cleaning cloth supply roll is brought into pressure contact with the outer circumferential surface of a rotating cylinder to wash away dirt, and once removed from the outer circumferential surface of the cylinder, the dirty cleaning cloth is removed from the cleaning cloth winding shaft, which has a means for preventing reverse rotation. In a cylinder cleaning device for a printing press that includes a cleaning unit that repeats the operation of winding up a part of the cleaning cloth and cleaning the dirt by pressing a clean part of the cleaning cloth against the outer circumferential surface again, the cleaning unit is fixed to a winding shaft and the cylinder outer circumference of the cleaning unit is A cleaning cloth winding lever that converts the movement of separating from the surface or returning to the cleaning cloth pressing position into a rotational movement of the cleaning cloth winding shaft via a reversal prevention means, and a cleaning cloth winding lever that protrudes into the movement area of the cleaning cloth winding lever. There is a pin that is fixed to a fixed member on the printing machine main body side and makes contact with the cleaning cloth winding lever to wind up the cleaning cloth, and a pin that detects the winding diameter of the cleaning cloth wound around the cleaning cloth winding shaft. The present invention proposes a cylinder cleaning device for a printing press that is equipped with a fixed-length winding mechanism that regulates the return angle of the lever in accordance with an increase in the winding diameter to keep the winding amount of cleaning cloth constant.

The cleaning unit is a rotating type cleaning unit that rotates around a support shaft fixed to the printing press frame to press the cleaning cloth against the outer peripheral surface of the cylinder or remove it, and a linear guide fixed to the printing press body. The cleaning unit may be a linearly moving cleaning unit that reciprocates in a direction perpendicular to the generatrix of the cylinder along the cylinder to bring the cleaning cloth into or out of pressure contact with the outer peripheral surface of the cylinder.

[Effect]

In the present invention, since a lever of a simple shape is provided in the portion that converts the detachment operation of the cleaning unit from the cylinder outer peripheral surface or the return operation to the cleaning cloth pressure contact position into the driving force of the cleaning cloth winding means, the cleaning There is no need to provide a power source dedicated to winding up the cloth, and the configuration of the cleaning device is simplified and made more compact, leading to cost reductions.

In addition, the winding diameter of the cleaning cloth wound around the cleaning cloth winding shaft is detected, and the return angle of the lever is regulated according to the increase in the winding diameter of the cleaning cloth, thereby keeping the winding amount of the cleaning cloth constant. Equipped with a fixed-length winding mechanism that maintains the cleaning cloth, unnecessary winding of the cleaning cloth is eliminated, and running costs can also be reduced.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a diagram showing a state in which cleaning cloth is pressed into contact with an embodiment of an automatic cylinder cleaning device according to the present invention that employs a rotating type cleaning unit, and Fig. 2 is a diagram showing a state in which winding of the cleaning cloth is completed after detachment from the device shown in Fig. 1. FIG. 3 is an enlarged view of the cleaning cloth winding shaft of the apparatus shown in FIG. 1, and FIG. 4 is a side view of the main parts of the apparatus shown in FIG. 3.

In these figures, reference numeral 2 denotes a plunger cylinder as a cylinder to be cleaned, 6 a side plate of the cleaning unit 4, 8 a cleaning cloth supply roll, and 1
0 is a cleaning cloth, 12 is a cleaning liquid nozzle that sprays cleaning liquid onto the cleaning cloth 10, and 14 is a left and right side plate 4.
The support bar 16 is a press-contact pad cover that fixes the press-contact pad 18, 20 is a cleaning cloth winding shaft, and 22 is a cleaning cloth winding shaft 20 that rotates in accordance with the rotation of the cleaning unit 4 to wind up a predetermined amount. After that, when the cleaning unit 4 returns to the pressed state, the cleaning cloth take-up lever 22a rotates counterclockwise by a known one-way clutch (not shown) and returns from the position shown in FIG. 2 to the position shown in FIG. A cleaning cloth winding amount adjusting cam formed by extending a part of the cleaning cloth winding lever 22 in order to regulate the rotation amount of the cleaning cloth winding shaft and wind up a constant size regardless of the cleaning cloth winding diameter; Reference numeral 24 denotes a tension spring that applies counterclockwise rotational force to the cleaning cloth take-up lever 20. Reference numeral 26 has a pin gear at its tip that engages the cleaning cloth 10 that has been wound up. The cleaning cloth take-up amount adjusting lever 32, which is given a rotational force in the direction, adjusts as the amount of the cleaning cloth 10 fitted into the hole formed in the cleaning cloth winding amount adjusting lever 26 increases. Stopper 3 in Figure 3
A pin 40 regulates the return angle of the cleaning cloth take-up amount adjusting cam 22a while its movement is regulated by 6, and a pin 40 is installed on a fixed plate 38 on the printing machine main body side and comes into contact with the cleaning cloth take-up lever 22 to wind up the cleaning cloth. A fixing pin 44 rotates around a rotating shaft 42 fixed to the fixing plate 38, and is fitted into a hole 6a formed in the side plate 6. A lever 48 rotates the side plate 6 through a fixing pin 46. A pin that connects the cylinder rod 52 of the air cylinder 50 to the lever 44, 54 a fixing plate that fixes the fixing plate 38 to the printing press body side frame 58, 56 a pin that connects the air cylinder 50 to the printing press body side frame 58, Reference numeral 60 denotes a rotation shaft that connects the side plate 6 to the frame 58 on the printing press main body side.

The cleaning cloth winding operation of this embodiment configured in this way will be explained. When the air cylinder 50 is activated after cleaning is finished with the cleaning cloth in the state shown in FIG. 1, the cylinder rod 52 starts moving to the left in FIG. Along with this, the lever 44 rotates clockwise, the side plate 6 is rotated clockwise around the rotation shaft 60, and the cleaning cloth 1 is moved by the pressure pad 18.
0 is released from pressure contact with the blanket cylinder 2. The side plate 6 centered on the rotation axis 60 at this time
As a result of the rotation, the cleaning cloth winding lever 22 in contact with the fixing pin 40 also rotates under the clockwise rotational force, causing the cleaning cloth 10 to be wound around the cleaning cloth winding shaft 22. This winding operation continues until the state shown in FIG.

When the supply of compressed air to the air cylinder 50 is stopped from the state shown in FIG.
and the side plate 6 rotates counterclockwise, and the first
Return to the state shown in the figure. At this time, the cleaning cloth take-up lever 22 also returns to its original position while contacting the pin 40 by the force of the tension spring 24, but since a known one-way clutch is interposed between it and the cleaning cloth take-up shaft 20, The cloth winding shaft 20 is maintained in the state upon completion of winding. Therefore, a new clean portion of the cleaning cloth is pressed against the plunger cylinder 2, and the next cleaning is carried out.

Here, the operation of the fixed size winding mechanism will be explained with reference to FIG. When the cleaning cloth 10 is wound up and the cleaning cloth winding shaft 20 and the winding diameter become large, a cleaning cloth winding having a pin carrier 28 at one end that constantly comes into contact with the surface of the cleaning cloth 10 wound up by the tension spring 30 and the force is applied. The removal amount adjustment lever 26 gradually rotates counterclockwise. Therefore, since the movable range of the pin 32 whose head is fitted into the hole 26a of the lever 26 is also restricted by the slope of the stopper 36, it gradually moves to the lower right side in the figure.
As a result, the return angle of the cleaning cloth winding amount adjusting cam 22a gradually decreases. Therefore, even if the side plate 6 rotates by the same angle, the rotation angle of the cleaning cloth winding shaft 20 decreases as the winding diameter increases. The cleaning cloth 10 is wound up on the cleaning cloth winding shaft 20.

Next, another embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG. 5 is a diagram showing a state in which a cleaning cloth is pressed into contact with an embodiment of the present invention of an automatic cylinder cleaning device employing a linearly moving type cleaning unit, and FIG. 6 is a side view of the essential parts of the device shown in FIG.
In these figures, parts that perform the same functions as those in the embodiment of FIGS. 1 to 4 are given the same symbols.

In this embodiment, instead of rotating the cleaning unit 4 around a predetermined rotation axis, the air cylinder 50 causes the cleaning unit 4 to linearly reciprocate in the radial direction of the cylinder 2 to be cleaned. Note that the cleaning cloth winding amount adjustment lever 26 can be adjusted by using the pin 32 or the slope of the stopper 36 shown in FIG.
The return amount of the cleaning cloth winding amount adjusting cam 22a is directly regulated by the surface of the cam 26a formed at its tip.

The overall operation is the same as that of the embodiment shown in FIG. 1, so a description thereof will be omitted.

In each of the above embodiments, an air cylinder is used as a drive source for the reciprocating motion that presses the cleaning unit against the cylinder or separates it from the cylinder. Of course, other power sources such as an actuator or a motor may also be used.

Further, in place of the one-way clutch used as a means for preventing the winding shaft from reversing, other mechanisms such as a ratchet mechanism may be employed.

〔Effect of the invention〕

According to the present invention, a lever of a simple shape is provided in the portion that converts the movement of the cleaning unit from the outer circumferential surface of the cylinder or the movement of the cleaning unit back into the cleaning cloth pressure contact position into a driving force for the cleaning cloth winding means. There is no need to provide a power source dedicated to winding up the cleaning cloth, which simplifies the configuration of the cleaning device and makes it more compact, leading to cost reductions.

In addition, the winding diameter of the cleaning cloth wound around the cleaning cloth winding shaft is detected, and the return angle of the lever is regulated according to the increase in the winding diameter of the cleaning cloth, so that the amount of winding of the cleaning cloth is kept constant. Equipped with a fixed length winding mechanism that maintains the cleaning cloth, there is no need to wind up the cleaning cloth unnecessarily, and running costs can also be reduced.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a state in which cleaning cloth is pressed into contact with an embodiment of an automatic cylinder cleaning device according to the present invention that employs a rotating type cleaning unit, and Fig. 2 is a diagram showing a state in which winding of the cleaning cloth is completed after detachment from the device shown in Fig. 1. Figure 3 is an enlarged view of the cleaning cloth winding shaft of the apparatus shown in Figure 1, Figure 4 is a side view of the main parts of the apparatus shown in Figure 3, and Figure 5 uses a linear movement cleaning unit. FIG. 6 is a side view of the main part of the apparatus shown in FIG. 2... Cylinder (blanket body), 4... Cleaning unit, 6... Side plate, 6a...
Hole, 8...Cleaning cloth supply roll, 10...Cleaning cloth,
12...Cleaning liquid nozzle, 14...Support bar,
16...Pressure pad cover, 18...Pressure pad, 20...Cleaning cloth winding shaft, 22...Cleaning cloth winding lever, 22a...Cleaning cloth winding amount adjustment cam, 26...Cleaning cloth winding amount adjustment lever,
28...Pin keyary, 30...Tension spring, 32
... Pin, 34 ... Rotating shaft, 36 ... Stopper, 38 ... Fixed plate, 40 ... Fixed pin, 42 ...
...Rotating shaft, 44...Lever, 46...Roller, 48
... Pin, 50 ... Air cylinder, 52 ... Cylinder rod, 54 ... Fixing plate, 56 ... Pin, 5
8...Printing press frame, 60...Rotating shaft.

Claims (1)

[Scope of Claims] 1. A cleaning cloth winding having a cleaning cloth fed out from a cleaning cloth supply roll, which is brought into pressure contact with the outer circumferential surface of a rotating cylinder to clean dirt, and which is once removed from the outer circumferential surface of the cylinder, and has a reverse rotation prevention means. The cylinder cleaning device for a printing press includes a cleaning unit that repeats the operation of winding up the dirty part of the cleaning cloth around a pick-up shaft and pressing the clean part of the cleaning cloth against the outer peripheral surface again to clean the dirt. A cleaning cloth winder which is fixed to the winding shaft and converts the detachment operation of the cleaning unit from the outer circumferential surface of the cylinder or the return operation to the cleaning cloth pressure contact position into a rotational movement of the cleaning cloth winding shaft via the reversal prevention means. A take-up lever; and a pin that is fixed to a fixed member on the printing press main body side so as to protrude into a movement area of the cleaning cloth take-up lever, comes into contact with the cleaning cloth take-up lever, and winds up the cleaning cloth. Cylinder cleaning equipment for printing presses. 2. The cleaning cloth sent out from the cleaning cloth supply roll is brought into pressure contact with the outer peripheral surface of a rotating cylinder to clean dirt, and once removed from the outer peripheral surface of the cylinder, the cleaning cloth is attached to a cleaning cloth winding shaft having a reverse rotation prevention means. A cylinder cleaning device for a printing press that includes a cleaning unit that repeats an operation of winding up a dirty part of the cleaning cloth and pressing a clean part of the cleaning cloth against the outer circumferential surface again to clean the dirt, which is fixed to the winding shaft. a cleaning cloth take-up lever that converts the detachment operation of the cleaning unit from the outer peripheral surface of the cylinder or the return operation to the cleaning cloth press-contact position into a rotational movement of the cleaning cloth take-up shaft via the reversal prevention means; a pin that is fixed to a fixed member on the printing press main body side so as to protrude into a movement area of the cloth winding lever, contacts the cleaning cloth winding lever and winds up the cleaning cloth; and a pin that is wound around the cleaning cloth winding shaft. It is characterized by being equipped with a fixed-length winding mechanism that detects the winding diameter of the cleaning cloth, regulates the return angle of the lever according to an increase in the winding diameter of the cleaning cloth, and keeps the winding amount of the cleaning cloth constant. Cylinder cleaning equipment for printing presses. 3. The cylinder cleaning device for a printing press according to claim 1 or 2, wherein the cleaning unit is rotated about a support shaft whose position is fixed to the printing press frame as a fulcrum, and presses the cleaning cloth against the outer peripheral surface of the cylinder. A cylinder cleaning device for a printing press, comprising a cleaning unit that can be moved or removed. 4. The cylinder cleaning device for a printing press according to claim 1 or 2, wherein the cleaning unit reciprocates in a direction perpendicular to the generatrix of the cylinder along a linear guide fixed to the printing press main body, and cleans the outer periphery of the cylinder. A cylinder cleaning device for a printing press, comprising a cleaning unit that brings the cleaning cloth into pressure contact with or removes the cleaning cloth from the cylinder surface.