JP2605125Y2 - Printing machine cylinder cleaning device - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention is applicable to various printing presses.
The present invention relates to a cylinder cleaning device that cleans a peripheral surface of a cylinder, such as a cylinder such as a blanket cylinder and an impression cylinder, and a roller such as a setting roller and a swing roller.

[0002]

2. Description of the Related Art Various printing presses such as offset printing presses and intaglio printing presses include cylinders such as plate cylinders, blanket cylinders and impression cylinders,
Equipped with many cylinders such as rollers such as swing rollers, etc. Foreign matter such as ink residue and paper dust adheres to the peripheral surface of these cylinders during printing work and reduces the quality of printed matter. A cylinder cleaning device is provided.

In order to clean a blanket cylinder, for example, when cleaning a blanket cylinder, this type of cylinder cleaning device extends in the axial direction in proximity to the peripheral surface of the blanket cylinder, and has both ends rotatably supported by bearings of a device frame. It has a shaft and a winding shaft, and the winding shaft is provided with an intermittent rotation device generally called a fixed-size feeding device (described later). And a band-shaped cleaning cloth made of non-woven fabric or the like is wound on the rewind shaft in a separate process,
The cleaning cloth is pressed against the peripheral surface of the blanket cylinder by one or two guide rollers provided between the rewinding shaft and the winding shaft, or a pad, and then wound on the winding shaft. ing.

With this configuration, when the blanket cylinder is rotated and the take-up shaft is intermittently rotated by the sizing feeder, the cleaning cloth runs intermittently and adheres to the peripheral surface of the blanket cylinder. The foreign matter that has been wiped off with the cleaning cloth is transferred to the cleaning cloth, and the cleaning cloth is wound around the winding shaft while the foreign matter is adhered.

[0005] Therefore, the fixed size feeding device will be described. FIG. 5 is a schematic side view of the sizing feeder disclosed in Japanese Patent Application Laid-Open No. 1-314173. Referring to FIG. A cleaning cloth that is wound up from the diameter indicated by reference numeral 2A in the figure to the diameter indicated by reference numeral 2B by winding is wound on the shaft 1 supported by the shaft. A lever 3 urged by a spring member (not shown) to rotate clockwise in the figure is fitted via a one-way clutch 4.

An air cylinder 5 is fixed to one of the device frames, and a linear portion 3a of the lever 3 is pressed against the working end of the piston rod 6 which moves forward and backward by the air pressure by the spring force of the spring member. Have been. Further, a roller arm 7 is swingably supported by the apparatus frame on the same side, and an end shaft 9a is guided to the free end of the roller arm 7 by an arc-shaped long hole 8 of the apparatus frame. The roller 9 is supported, and the roller arm 7 is provided with a rotating force in a direction in which the roller 9 is pressed against the peripheral surfaces of the cleaning cloths 2A and 2B by the spring force of a spring member (not shown). The lever 3 is configured so that its curved surface 3b is brought into contact with the end shaft 9a so that the end of rotation in the counterclockwise direction is regulated.

With this configuration, the cleaning operation is started in a state where the rollers 9 are pressed against the peripheral surface of the cleaning cloth 2A having the minimum diameter by the spring force, and the piston rod 6 is pressed by the air pressure of the air cylinder 5. Advance or retreat, the lever 3 pressed against the tip of the piston rod 6 swings by the spring force of the spring member, and the winding shaft 1
The cleaning cloth 2A is wound by rotating only in the direction. And
When the winding diameter of the cleaning cloth 2A gradually increases from 2A to 2B, the roller 9 pressed against the winding surface of the cleaning cloth 2A by a spring force causes its end shaft 9a to extend along the long hole 8. The lever 3 whose swinging to one side is regulated by bringing the curved surface 9b into contact with the end shaft 9a by ascending
Since the swing angle gradually decreases, the winding length does not increase even if the winding diameter increases, and can be kept almost constant.

By providing such a sizing feeder, there is an effect that the consumption of the cleaning cloth does not become unnecessarily large when the winding diameter becomes large, and the cost is reduced.

[0009]

However, in such a conventional apparatus, an arc-shaped long hole 8 is provided in the apparatus frame, and the end shaft 9a of the roller 9 is slid along the long hole 8. The sliding surface of the long hole 8 and the end shaft 9
a is liable to wear, when the worn to become not function as a fixed-dimension feed device, also the repair there is a problem that cumbersome and repair costs increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in view of the above-mentioned points, and has been made to increase the durability of the sizing device and to improve the function of the sizing device with a simple structure, thereby enabling the cylinder cleaning of a printing press to be improved. It is intended to provide a device.

[0011]

According to the present invention, in order to solve such an object, in a cylinder cleaning device of a printing press, a driving shaft is fitted to a winding shaft for winding a cleaning cloth through a one-way clutch. A take-up lever that is driven and rotated, and a swing lever that has a contact portion that is swingably supported on the apparatus frame via a swing support shaft and that comes into contact with the peripheral surface of the wound cleaning cloth, A spring member that applies a rotating force in a direction in which the contact portion is pressed against the peripheral surface of the take-up cleaning cloth to the swing lever,
A cam follower pivotally attached to the free end of the take-up lever; and a cam follower that is fixed to the swing center of the swing lever in contact with the cam follower and is rotated by the swing of the swing lever so that the contact position with the cam follower is adjusted. And a cam that changes the rotation end of the take-up lever.

[0012]

When the take-up lever is reciprocated in the forward and reverse directions by the drive device after the cleaning operation is started, the one-way clutch intermittently turns only in the take-up direction, and the cleaning cloth is taken up by the take-up shaft. . On the other hand, the swinging lever is pressed against the peripheral surface of the cleaning cloth by winding the contact portion provided at the free end portion,
The rotation end of the winding lever is regulated by a cam provided at the swing center. As the cleaning operation is repeated and the diameter of the take-up cleaning cloth increases, the cam rotates with the swing of the swing lever, and the position of contact with the cam follower changes, changing the rotation end limit of the take-up lever. Then, the swing angle of the take-up lever, that is, the take-up angle of the cleaning cloth is reduced. Therefore, even if the diameter of the cleaning cloth is increased, the winding length of the cleaning cloth does not increase.

[0013]

1 and 2 show an embodiment in which a cylinder cleaning device for a printing press according to the first aspect is applied to a blanket cylinder. FIG. 1 is a side view of a fixed-size feeding device, and FIG. is there. Since the configuration of the entire cylinder cleaning device has been described in the section of the prior art, the description thereof will be omitted. In the drawing, a take-up shaft 12 for taking up a cleaning cloth 11 after cleaning is rotatably supported on left and right device frames 10 via a one-way clutch that allows rotation only in the take-up direction. A winding lever 14 is fitted to a protruding portion from the frame 10 via a one-way clutch 15 that allows the winding shaft 12 to rotate only in the winding direction. An air cylinder 16 as a driving device for rotating the take-up lever 14 is swingably supported on the apparatus frame 10 and is fixed to a working end of a piston rod 17 which moves forward and backward by the air pressure. The metal fitting 18 is pivotally attached to one free end of the winding lever 14.

On the other hand, a lever shaft 19 is rotatably supported in a shaft hole of the device frame 10 on one side, and the lever shaft 19 is fixed to a cam 20 (described later) fixed to the outside of the device frame 10. The movement in the axial direction is restricted by the swing lever 21 fixed inside the device frame 10. The swing lever 21 is formed in a rectangular shape, and at its free end, a roller 22 is pivotally mounted as a contact portion that contacts the peripheral surface of the take-up cleaning cloth 11. Hook 23 on the swing side and spring hook 2 on the swing lever 21 side
A tension spring 25 that applies a rotating force to the swing lever 21 in a direction to press the roller 22 against the peripheral surface of the cleaning cloth 11 is stretched between the roller 4 and the roller 4.

The cam 20 has a circumferential cam surface 20a protruding from the boss portion. A cam follower 26, which is in contact with the circumferential cam surface 20a, is pivotally mounted on one free end of the winding lever 14. ing. By doing so, the take-up lever 14 swings, and the cam follower 26 moves to the cam surface 20a.
, The rotation end of the winding lever 14 is regulated, and the swinging lever 21 swings to change the point of contact between the cam surface 20a and the cam follower 26, whereby the rotation of the winding lever 14 is changed. The moving end is configured to change.

The operation of the cylinder cleaning device configured as described above will be described. When a blanket cylinder (not shown) is rotated and the piston rod 17 of the air cylinder 16 is advanced by air pressure, the take-up lever 14 rotates counterclockwise in FIG. 1 and the cam follower 26 moves the cam surface 20 a of the cam 20.
, The rotation end of the winding lever 14 is regulated, and thereafter the winding lever 14 rotates clockwise in FIG. 1 by the air pressure of the air cylinder 16 and returns to the original position. When the take-up lever 14 repeats the reciprocating rotation in the forward and reverse directions, the take-up shaft 12 intermittently rotates in the take-up direction by the action of the one-way clutch 15, so that the cleaning cloth 11 runs intermittently, and Foreign matter adhering to the peripheral surface of the body is
The cleaning cloth 11 is transferred to the cleaning cloth 11, and the cleaning cloth 11 is wound around the winding shaft 12 with the foreign matter adhered thereto.

When the winding diameter of the cleaning cloth 11 gradually increases from the diameter indicated by the reference numeral 11 to the diameter indicated by the reference numeral 11A, the rollers 22 pressed against the peripheral surface of the cleaning cloth 11
The swing lever 21 swings through the cam lever 20 and the cam 20 integral with the swing lever 21 rotates, and the contact point with the cam follower 26 gradually changes from the small diameter portion of the cam surface 20a to the large diameter portion. The rotation limit of the winding lever 14 changes, and the rotation angle of the winding lever 14 gradually decreases. Therefore, even if the winding diameter increases, the winding length does not increase, and the winding length can be kept almost constant.

3 and 4 show a second embodiment of the present invention. FIG. 3 is a side view of the sizing feeder, and FIG. 4 is a longitudinal sectional view of the same. In the drawing, a take-up shaft 12 for taking up a washed cleaning cloth 11 is supported on the left and right device frames 10 via a one-way clutch 13 allowing rotation only in the take-up direction. On a protruding portion from the device frame 10, a take-up lever 30 formed in a V shape is provided.
The take-up shaft 12 is fitted via a one-way clutch 13 that allows rotation only in the take-up direction. An air cylinder 16 as a driving device for rotating the winding lever 30 is swingably supported by the device frame 10 and is fixed to a working end of a piston rod 17 which moves forward and backward by the air pressure. The metal fitting 18 is pivotally attached to one free end of the winding lever 30.

On the other hand, a flanged lever shaft 31 is inserted into a shaft hole of the device frame 10 on one side, and is fixed with a nut 32. The lever shaft 31 protrudes inside the device frame 10. . Reference numeral 33 denotes a swinging lever which is rotatably supported by the lever shaft 31 and is prevented from falling off by a snap ring 34. A roller shaft 35 inserted and fixed in a shaft hole at its free end has a roller 36. Is pivotally mounted so that the peripheral surface thereof is in contact with the peripheral surface of the cleaning cloth 11, and between a spring hook 37 on the device frame 10 side and a spring hook 38 on the swing lever 33 side. A tension spring 39 for applying a rotating force to the swing lever 33 in a direction to press the roller 36 against the peripheral surface of the cleaning cloth 11 is stretched.

Further, the cam surface 30b is formed inside the protruding piece 30a, and is in contact with a contact portion, that is, a projecting base portion of the roller shaft 35 projecting from the swing lever 33. As a result, as the diameter of the take-up cleaning cloth 11 increases, the roller 36 moves in the direction away from the take-up shaft 12 while swinging the swing lever 33, and the pair of the roller 36 and the arc-shaped cam surface 30b. The contact is moved from the base to the tip of the protruding piece 30a, and the rotation end of the winding lever 30 is changed. Take-up lever 3
When the rotation limit of 0 changes, the rotation angle of the winding lever 30 gradually decreases, so that the winding length does not increase even if the winding diameter increases, and the winding length is kept almost constant. can do. Further, since the cam surface 30b is in contact with the protruding base of the roller shaft 35, wear and bending of the roller shaft 35 are eliminated.

The operation of the cylinder cleaning device configured as described above will be described. When the blanket cylinder (not shown) is rotated and the piston rod 17 of the air cylinder 16 is advanced by air pressure, the winding lever 30 rotates counterclockwise in FIG. 1 and is formed on the protrusion 30a of the winding lever 30. When the set cam surface 30b comes into contact with the roller shaft 35, the rotation end of the winding lever 30 is regulated, and thereafter the winding lever 30 is rotated.
Is rotated clockwise in FIG. 3 by the air pressure of the air cylinder 16 and returns to the original position. When the take-up lever 30 repeats the reciprocating rotation, the take-up shaft 12 intermittently rotates in the take-up direction by the action of the one-way clutch 15, so that the cleaning cloth 1
1 intermittently travels, and foreign matter adhering to the peripheral surface of the blanket cylinder is wiped off by the cleaning cloth 11 and transferred to the cleaning cloth 11, and the cleaning cloth 11 has the foreign matter adhered thereto. It is wound up.

When the winding diameter of the cleaning cloth 11 gradually increases from the diameter indicated by the reference numeral 11 to the diameter indicated by the reference numeral 11A, the rollers 36 pressed against the peripheral surface of the cleaning cloth 11 are pressed.
The swing lever 33 swings in the clockwise direction in FIG. 3 through the shaft, so that the roller shaft 35 and the cam surface 30b integrated with the swing lever 33 are provided.
Moves from the base to the tip of the cam surface 30b. As a result, the rotation limit of the winding lever 30 is changed by the action of the cam surface 30b, and the rotation angle of the winding lever 30 is gradually reduced. Therefore, if the winding length is large even if the winding diameter is large, Therefore, the winding length can be kept almost constant.

In each of the above embodiments, the blanket cylinder is illustrated as the cylinder to be cleaned. A roller such as a swing roller may be used. Further, in the above-described embodiment, the example in which the rollers 36 are provided has been described, or it is not always necessary to provide the rollers 36, and the roller shaft 35 may directly contact the cam surface 30a. Also, the cam follower 26
May be a rolling bearing or a shaft. Further, the drive device in the device is not limited to the air cylinder, but may be a hydraulic cylinder, a rotary actuator, or the like.

[0024]

As is apparent from the above description, according to the present invention, in the cylinder cleaning device of the printing press, the cylinder is mounted on the winding shaft for winding the cleaning cloth through a one-way clutch and driven by the driving device. A pivoting take-up lever, a pivoting lever having a contact portion which is pivotably supported on the apparatus frame via a pivot support shaft and which comes into contact with a peripheral surface of the wound cleaning cloth; A spring member that applies a rotating force to the swing lever in a direction in which the portion is pressed against the peripheral surface of the take-up cleaning cloth, a cam follower pivotally attached to the free end of the take-up lever, and swings in contact with the cam follower. A cleaning cloth fixed to the center of the swing of the lever and rotated by the swing of the swing lever to change the contact position with the cam follower and change the rotation end of the winding lever; Constant take-up length even when the take-up diameter changes It is possible to hold the cleaning costs are reduced there is no waste of cleaning cloth by taking up the excess cleaning cloth. In addition, since the part for detecting the winding diameter of the cleaning cloth and the part for regulating the amount of movement by the driving device are separated, the load of the driving device is not received by the winding diameter detecting pins, so that the pin receiver is not used. In addition to eliminating the need for pins, wear and deflection of the pins are eliminated, and durability and a cleaning function are improved. Further, there is no need to make an arc-shaped hole in the frame as in the related art, and the manufacturing cost is reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a sizing feeder.

FIG. 2 is a longitudinal sectional view of the sizing feeder.

FIG. 3 is a side view of the sizing device according to the second embodiment of the present invention .

FIG. 4 is a longitudinal sectional view of the sizing feeder according to the second embodiment of the present invention .

FIG. 5 is a schematic side view of a conventional sizing feeder.

[Explanation of symbols]

 Reference Signs List 10 apparatus frame 11 cleaning cloth 11A cleaning cloth 12 take-up shaft 14 take-up lever 15 one-way clutch 20 cam 21 swing lever 22 roller 25 tension spring 26 cam follower 30 take-up lever 30b cam surface 33 swing lever 35 roller shaft 36 roller 39 Tension spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A winding lever which is fitted on a winding shaft for winding a cleaning cloth through a one-way clutch and is rotated by being driven by a driving device, and is swingably mounted on a device frame via a swinging support shaft. A swinging lever having a contact portion supported and contacting the peripheral surface of the wound cleaning cloth; and a pivoting lever for rotating the rotating direction in a direction of pressing the contacting portion against the peripheral surface of the winding cleaning cloth. A cam follower pivotally attached to the free end of the take-up lever, fixed to the swing center of the swing lever in contact with the cam follower, and rotated by the swing of the swing lever. And a cam for changing a contact position with the cam follower and changing a rotation end of the winding lever.