JPH0730363Y2 - Plate cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a plate surface cleaning device for cleaning the surface of a plate mounted on the outer periphery of a plate cylinder of a printing press.

<Prior Art> An offset rotary printing machine includes a paper feeding device, a printing unit, a paper discharging device, and the like. Among these, a plate cylinder, a blanket cylinder, an impression cylinder, or each ink roller connected to an inking device is rotatably supported on the frame of the printing unit. Then, after the ink is applied to the plate cylinder by the ink roller, the ink is transferred to the blanket cylinder, fed from the paper feeding device, and printing is performed on the web passing between the blanket cylinder and the impression cylinder.

In such a printing machine, dust that has entered from the outside may adhere to the plate surface during printing. Therefore, conventionally, a cleaning device for cleaning the plate surface during printing is provided. In this cleaning device, the wiper body is movable by the slide mechanism in the direction of the axis of rotation of the plate cylinder and in the direction orthogonal to the axis of rotation, and a rubber wiper is attached to the tip of the wiper body.

Thus, when the plate cylinder rotates, the wiper body is moved closer to the plate cylinder and the wiper is moved against the plate surface while the wiper is pressed against the plate surface to remove dust and the like on the plate surface.

<Problems to be Solved by the Invention> With the rapid development of printing technology in recent years, printing speed has been increased. When the offset rotary printing press is operated at high speed, ink mist is generated near the plate cylinder. This ink mist means that during printing, that is, when the ink is being kneaded or transferred to each roller or cylinder, the ink becomes fine particles and floats in the air in the form of mist. The higher the printing speed, the greater the floating amount.

When this ink mist occurs, in the above-mentioned conventional plate surface cleaning device, floating ink adheres between the sliding mechanism and each member of this cleaning device, causing the cleaning device to malfunction. However, there was a problem that it interfered with the work of cleaning the printing plate.

The present invention solves such a problem, and an object of the present invention is to provide a plate surface cleaning device capable of smoothly operating and cleaning the plate surface at any time without causing the cleaning device to malfunction. .

<Means for Solving the Problems> A plate surface cleaning device of the present invention for achieving the above object is a cleaning device for cleaning a plate surface of a plate cylinder rotatably supported by a frame, wherein A rail arranged in a direction parallel to the axis of rotation of the cylinder, a moving member movably supported by the rail, and a member movably supported by the moving member in a direction orthogonal to the axis of rotation of the plate cylinder. A wiper main body, a wiper attached to the tip of the wiper main body to press the plate surface to clean the plate surface, the rail and the moving member are covered, the wiper body is projected, and the rotary shaft of the plate cylinder It is characterized by comprising a cover having an opening movable in a direction, and an elastic cover provided so as to close the opening.

<Operation> Even if ink mist is generated during printing, the rail and the moving member are covered with the cover, so that the floating ink is prevented from adhering to the rail and the moving member. Further, the elastic cover is provided in the opening of the cover through which the wiper body projects, so that when the wiper body is moved, the ink attached to the wiper body does not enter the inside of the cover and falls downward.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 is a top sectional view of a printing unit showing a plate surface cleaning device according to an embodiment of the present invention (a sectional view taken along the line I-I in FIG. 2),
2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is III in FIG.
-III sectional view, FIG. 4 is an IV-IV sectional view of FIG. 2, FIG. 5 is a VV sectional view of FIG. 4, FIG. 6 is a lower sectional view of the printing unit, and FIG. It is a schematic diagram of a printing machine.

The rotary offset printing press of this embodiment is a BB type (blanket-to-blanket type) capable of performing double-sided printing of all colors in one pass, and as shown in FIG.
And an in-feed device 2, a printing unit 3, a hot air drying device 4, a cooling device 5, and a paper discharging device 6. Thus, the web 7 fed from the paper feeding device 1 is subjected to tension by the infeed device 2 and then printed by the printing unit 3. Then, the printed web 7 is dried by the hot air drying device 4 and cooled by the cooling device 5, and then cut by the paper discharge device 6 into a predetermined size and folded.

The structure of the printing unit 3 of the offset rotary printing press thus configured will be described with reference to FIGS. 1, 2, and 6. Since the offset rotary printing press of this embodiment is capable of double-sided printing, two printing sections are provided above and below.
As shown in FIGS. 1 and 2, a plate cylinder 12 and a blanket cylinder 13 are axially supported in contact with each other on the upper part of the frame 11 of the printing unit 3, and a plate 14 for printing is mounted on the plate cylinder 12. It is installed.
An ink roller group 15 of an inking device (not shown) is provided above the plate cylinder 12, while a water supply roller group 16 of a water supply device is provided below.

Further, as shown in FIG. 6, the frame of the printing unit 3 is
A plate cylinder 22 and a blanket cylinder 23 are also supported on the lower part of the bearing 11 so as to face each other, and the blanket cylinder 23 is in contact with the above-mentioned blanket cylinder 13 and its outer peripheral surface. An ink roller group 25 and a water supply roller group 26 are also provided above and below the plate cylinder 22.

As described above, the double-sided printing machine of this embodiment includes the two plate cylinders 12 and 22 and the blanket cylinders 13 and 23, and is not provided with the impression cylinder, and the web passes between the two blanket cylinders 13 and 23. When doing so, printing is done on both sides of the web.

As shown in FIGS. 1 and 6, cleaning devices 31 and 32 are provided on the sides of the plate cylinders 12 and 22 for removing dust and the like adhering to the plate cylinders 12 and 22. In addition, each cleaning device 31,
Since the 32 has a similar structure, the cleaning device on the top
Only 31 will be described.

As shown in FIG. 1 and FIG. 2, mounting brackets 33 are fixed to the upper portions of the left and right frames 11 of the printing unit 3, and the ends of the support rails 35 are mounted on the mounting brackets 33 via the support plates 34. Parts are installed. The guide rail 35 is attached in parallel with the rotation axis direction of the plate cylinder 12, and the moving member 36 is movably supported along the longitudinal direction thereof. Further, the moving member 36 has a rod-shaped wiper body 37.
Is the longitudinal direction of the plate cylinder 12, that is, the moving member.
It is arranged in a direction orthogonal to the moving direction of 36 and is movably supported in the same direction. As shown in FIGS. 4 and 5, the wiper main body 37 has recesses 38 formed on both side portions thereof, and bolts 39 are screwed on both side portions of the moving member 36 so that the bolts 39 are attached. The tip portion is engaged with each recess 38 of the wiper body 37. This prevents the wiper body 37 from slipping out of the moving member 36 and regulates the amount of movement.

A rubber wiper 41 is attached to the tip of the wiper body 37. The wiper 41 is for removing the dust and the like adhering to the wiper 41 by pressing the tip of the wiper 41 against the surface of the plate 14 mounted on the plate cylinder 12 while the plate cylinder 12 is rotating. It is made of nitrile NBR rubber so that it doesn't stick.

On the other hand, a handle 42 is attached to the rear end of the wiper body 37. A cylindrical member 43 is provided in front of the handle 42.
The spring 45 is interposed between the cylindrical member 43 and the base plate 44 fixed to the moving member 36. Therefore,
The wiper body 37 is urged rearward with respect to the support member 36, that is, downward in FIGS. 2 and 5. In addition, the wiper body 37
A stopper 46 is fixed between the cylindrical member 43 and the substrate 44. This is to limit the amount of movement of the wiper body 37 by the stopper 46 coming into contact with the substrate 44 when the wiper body 37 moves forward.

As shown in FIGS. 1 to 3, the cleaning device 31 includes:
A cover 51 that covers the rail 35, the moving member 36, and the like is provided. The cover 51 is long in the longitudinal direction so as to cover the upper portion of the rail 35, and both ends thereof are fixed to the support plate 34. Further, the opening 52 is formed in the rail 35 in the cover 51.
A pair of brush covers 53 are attached to the opening 52 so as to close the opening 52. The brush cover 53 prevents dust and ink removed from the plate surface from entering the inside through the wiper body 37, and is formed by fixing a flexible brush to a rod-shaped base and opening the opening. Fixing screws 54 above and below part 52
It is fixed so that it faces each other and is detachable. And
The tip of the wiper body 37 projects from the opening 52.

A tray 55 is located below the cleaning device 31, and both ends of the tray 55 are fixed to the support plate 34. The tray 55 is for receiving dust and ink removed from the plate.

In the plate surface cleaning device configured as described above, when the plate surface is cleaned during printing, the wiper body 37 is held by the handle 42 while the plate cylinder 12 is rotated and the wiper main body 37 is rotated by the spring 45.
The wiper 41 at the front end is brought into pressure contact with the surface of the plate 41 by moving the wiper 41 in the forward direction against. Then, in this state, the wiper body 37 (moving member 36) is moved along the rail 35. Then, the wiper 41 moves while pressing on the plate surface of the rotating plate cylinder 12 to remove dust and ink adhering to the plate surface.

At this time, ink mist is generated and the rail of the cleaning device 31
Attempts to attach to 35 or moving member 36. However, since these are covered with the cover 51, the ink floating in the air does not adhere.

Further, dust, ink, etc. removed from the plate surface travels through the wiper body 37 and tries to enter the inside of the cover 51. However, a brush cover is placed between the cover 51 and the wiper body 37.
Since 53 is attached, dust and ink adhering to the wiper body 37 are dropped downward while the wiper body 37 is moving, so that dust and ink are prevented from entering the inside of the cover 51. Therefore, it is possible to perform a smooth plate surface cleaning operation. Then, the dropped dust and ink are received by the receiving tray 55, so that the printing unit 3 can be easily maintained without adhering to the water supply roller group 16 or the like.

Even in the cleaning device 32 below the frame 11, the plate surface of the plate cylinder 23 can be cleaned by operating in the same manner as the cleaning device 31 described above.

In addition, the brush cover 53 can be replaced by a proper number of times to perform more effective cleaning work.

Further, it goes without saying that instead of the brush cover 53, a cover formed of an elastic member such as rubber may be used.

<Effects of the Invention> As described above in detail with reference to the embodiments, according to the plate surface cleaning device of the present invention, the wiper body having the wiper attached to the front end is parallel to the rotation axis of the plate cylinder. Since it is movably supported in the orthogonal direction, the supporting mechanism is covered with a cover, and the wiper body projects and an elastic cover is provided in the cover opening that is movable in the rotation axis direction of the plate cylinder. Even if ink mist is generated, it is prevented from adhering to the rails or moving members. In addition, the ink attached to the wiper body tries to enter the inside of the cover during cleaning of the plate surface, but since the cover has an elastic cover, the ink is removed by the elastic cover when the wiper body moves and the inside of the cover is removed. Is prevented from entering.

As a result, the cleaning device operates smoothly without causing a malfunction, and the plate surface can be reliably cleaned. Moreover, maintenance of the cleaning device becomes very easy.

[Brief description of drawings]

1 is a top sectional view of a printing unit showing a plate surface cleaning device according to an embodiment of the present invention (a sectional view taken along the line I-I in FIG. 2),
2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is III in FIG.
-III sectional view, FIG. 4 is an IV-IV sectional view of FIG. 2, FIG. 5 is a VV sectional view of FIG. 4, FIG. 6 is a lower sectional view of the printing unit, and FIG. It is a schematic diagram of a printing machine. In the drawing, 11 is a frame, 12 and 22 are plate cylinders, 14 is a plate, 31 and 32 are cleaning devices, 35 is a guide rail, 36 is a moving member, 37 is a wiper body,
41 is a wiper, 51 is a cover, 52 is an opening, and 53 is a brush cover.

Claims (1)

[Scope of utility model registration request] 1. A cleaning device for cleaning a plate surface of a plate cylinder rotatably supported by a frame, wherein a rail is provided on the frame in a direction parallel to the rotation axis of the front plate cylinder, and the rail is movable. A movable member supported by the movable member, a wiper body movably supported by the movable member in a direction orthogonal to the rotation axis of the plate cylinder, and a plate surface that is attached to the tip of the wiper body and is pressed against the plate surface A wiper that cleans the top, a cover that covers the rail and the moving member and that has an opening formed by the wiper body that projects and is movable in the rotation axis direction of the plate cylinder, and the opening in the cover. A plate surface cleaning device, comprising: an elastic cover provided so as to be closed.