JPH0571390B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cleaning device for a web guide roller (hereinafter referred to as a guide roller) of a rotary printing press.
In particular, the present invention relates to a guide roller cleaning device of a type in which a number of guide rollers guiding a web are reciprocated in the axial direction to cause slippage between the web and the guide rollers, thereby wiping dirt such as ink adhering to the guide roller surface.

[Conventional technology]

FIG. 5 shows a side view of the newspaper rotary press. During normal printing, the web 3 fed from the web roll 2 of the paper feed stand 1 passes through a number of guide rollers 4 to the impression cylinder 6 of the printing unit 5.
guided by. Here, while being pressed against the impression cylinder 6 by the blanket cylinder 7, the ink transferred from the plate cylinder 8 to the blanket cylinder 7 is transferred onto the web 3. The printed web 3 is guided again by a large number of guide rollers 4, pulled by drag rollers 9, folded by a folding machine 11, and then conveyed to another process by a delivery conveyor (not shown).

The guide roller becomes dirty with ink, paper powder, etc. as printing time passes. If printing is performed in this state, the dirt on the guide roller will be transferred to the printing paper surface, reducing the product value. For this reason, in the case of newspaper rotary presses, printing operations are interrupted to clean the guide rollers. In this work, each guide roller is manually cleaned using a cloth moistened with cleaning oil or the like.

On the other hand, automatic cleaning devices for guide rollers have also been proposed. For example, in the method described in JP-A-62-149449, the peripheral speed of rotation of the guide roller is slightly different from the running speed of the web, and the surface of the guide roller is wiped by slipping due to this speed difference. It is configured as follows. The speed difference is generated by controlling the rotation of the guide roller using a rotation speed control device.

[Problem to be solved by the invention]

In printing machines such as newspaper rotary presses that have more than 100 guide rollers in one series, cleaning each guide roller manually requires a lot of effort, and the guide rollers are located in high places. Cleaning is risky. Depending on the location where the guide roller is installed, it may be difficult for a worker to reach, or the location may be narrow, making it difficult to work, which poses problems in terms of workability and safety.

In addition, the current automatic guide roller cleaning device requires a roller drive mechanism and a brake mechanism to create a speed difference between the paper and the guide roller, and also causes unbalanced tension in the web, which can cause paper breakage. Therefore, the device configuration and operation become complicated, such as the need to correct fluctuations in paper tension. Another drawback was that dirt remained on the guide roller near where both ends of the web came into contact with each other.

An object of the present invention is to provide a guide roller cleaning device that eliminates the inconvenience of cleaning the guide rollers by hand.

Another object of the present invention is to provide a guide roller cleaning device in which sliding between the web and the guide roller is caused by reciprocating motion in the axial direction of the guide roller and the cleaning is performed using the web.

Another object is to provide a simple mechanism for reciprocating the guide roller in the axial direction.

[Means to solve the problem]

In order to achieve the above object, the first invention provides a cleaning device for a guide roller in which a guide roller main body is fitted to a roller shaft so as to be rotatable but not slidable on the shaft. The guide roller reciprocating mechanism is attached to the roller shaft and reciprocates the roller shaft in the axial direction and reciprocates the entire guide roller in the axial direction. After the operating speed of the printing press is reduced and printing is interrupted, the drive section of the guide roller reciprocating mechanism is activated.

In still another invention, in the first invention, the guide roller reciprocating mechanism includes means for generating rotational power, means for converting the rotational motion into linear reciprocating motion in the roller axial direction, and the converting means includes the roller shaft. are in a concatenated configuration.

Yet another invention is the first invention,
The guide roller reciprocating mechanism includes means for generating reciprocating power, and the roller shaft is connected to a drive shaft of the means.

[Effect]

When not cleaning, the guide roller reciprocating mechanism is stopped to prevent slipping between the web and the guide roller while the web is running. On the other hand, during cleaning, the speed of the web is lowered below the operating speed of the printing press, and the guide roller reciprocating mechanism is activated to reciprocate the guide roller in the axial direction. The reciprocating motion of the guide roller in the axial direction while the web is running causes slippage between the web and the guide roller, and thereby dirt on the surface of the guide roller is wiped off by the web.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

(First Embodiment) FIG. 1 is a front view of a guide roller reciprocating mechanism 20 that reciprocates the roller shaft 10 of the guide roller 4 in the roller axial direction.

The guide roller 4 includes a guide roller shaft 10 attached to the machine frame 30, and a guide roller main body 4a supported on the shaft through a bearing 12 so as to be non-slidable and rotatable. The guide roller shaft 10 is non-rotatably provided on a sliding bearing 14 provided on the machine frame 30 and is movable in the roller axial direction.As shown in the figure, a link 21 is attached to the shaft end protruding from the machine frame. A slit 22 is formed for pivotally connecting one end of the slit. The other end of the link is pivotally supported at a position offset from the rotation center of the wheel 23. The wheel 23 is fixed to a shaft 25 rotatably supported by a bracket 24 attached to the frame of the machine, and this shaft 25 is rotated by a drive section 40. Note that the drive section 40 includes a motor as a drive source and a shaft 25.
In addition to a transmission mechanism that is constructed of a belt, gears, etc. that transmits power to the shaft 25, a geared motor may be directly connected to the shaft 25.

In this embodiment, the swing width (amount) of the guide roller 4 in the roller axial direction is determined by changing the pivot position P of the link 21 to the wheel 23, that is, from the center of rotation O of the wheel, as shown in FIG. distance l
The number of reciprocating movements of the guide roller can be arbitrarily set by changing the number of rotations of the wheel.

Next, the operation of the above embodiment will be explained.

During non-cleaning, the guide roller reciprocating mechanism 10 is in a stopped state, so the guide roller main body 4a rotates only in the running direction A of the web 3.

If the guide roller 4 becomes stained with ink, the speed of movement of the printing press is reduced, the blanket cylinder 7 and the plate cylinder 8 are separated from the web 3, and printing is interrupted. web 3
If the web is pulled by the drag roller 9 without changing the path, the web 3 is not printed, passes through each guide roller 4 and the impression cylinder 6, and is folded as a blank sheet by the folding machine 13. At this time, the dirt adhering to the guide roller 4 is transferred to the blank web 3, and the guide roller 4 becomes clean.

That is, after shifting to slow operation and reducing the traveling speed of the web 3, the drive section is activated by a command from a controller (not shown). Then, the guide roller main body 4a is rotated by the running of the web and moved in the roller axial direction. Therefore, the guide roller 4 is reciprocated in the direction B perpendicular to the running direction A of the web due to the reciprocating movement of the roller shaft. At this time, slipping occurs between the web 3 and the guide roller main body 4a, and the ink adhering to the surface of the guide roller is wiped away by the web.

(Second Embodiment) FIG. 3 is a front view of another guide roller reciprocating mechanism. Note that the same reference numerals are given to the same members as in the first embodiment, and the explanation thereof will be omitted.

A mounting portion 11 provided on the roller shaft is formed on the roller shaft 10 between the guide roller main body 4a and the machine frame 30 in order to pivotally attach the operating lever 100. The actuating lever 100 is pivotably supported in the middle by a support 110 attached to the machine frame 30 so as to be rotatable in the roller axial direction, and elongated holes 101 and 102 are formed at both ends of the actuating lever 100. . One end of the link 100 is fitted into the mounting hole 11 of the roller shaft and pivoted by loosely fitting a pin 103 into the elongated hole 101, and the other end is fitted into the drive shaft 121 of the reciprocating motion generator 120 through the elongated hole 102. They are connected by loosely fitting a pin 104 between them. The reciprocating motion generator 120 is composed of a pneumatic or electric vibrator, and its drive shaft 12
1 is attached to the machine frame 30 via a bracket 122 so that the operating direction of the roller 1 is parallel to the roller axis 10.

Next, the operation of the above embodiment will be explained.

When the reciprocating motion generator operates, the operating lever will
The guide roller swings in the axial direction of the roller around the fulcrum of the support, and this swing is transmitted to the roller shaft to cause the guide roller to reciprocate in the axial direction of the roller. This reciprocating movement of the guide roller functions in the same manner as in the first embodiment.

According to this embodiment, since there is no mechanism for converting to reciprocating motion, the device configuration is simplified. Furthermore, depending on the installation space, as shown in FIG. 4, the lever mechanism may be omitted and the drive shaft 121 of the reciprocating motion generating device 120 may be directly connected to the roller shaft 10.

Note that 123 is a coupling that connects the roller shaft 10 and the drive shaft 121.

Further, in each of the embodiments described above, since the operation timing of the drive unit can be controlled for each guide roller, the relative direction and number of reciprocating movements of each guide roller can be set arbitrarily. For example, since adjacent guide rollers can be moved in opposite directions, control can be performed to prevent the web from shifting or meandering.

〔Effect of the invention〕

As described above, according to the present invention, any swing width or number of reciprocating movements can be easily created by changing the operating specifications of the link mechanism part and the drive unit, such as the rotational speed of the motor and the number of reciprocating movements of the vibrator. .

Further, a special mechanism for stopping the axial movement of the guide roller is not required, and the structure is simplified.

Furthermore, since the operation timing of the drive unit can be controlled for each guide roller, the relative direction and number of reciprocating movements of each guide roller can be set arbitrarily. Therefore, since adjacent guide rollers arranged in front and behind with respect to the running direction of the web can be moved in opposite directions, it is possible to prevent the web from shifting or meandering.

Furthermore, since the guide roller moves in the axial direction, there is no unwiped portion of the guide roller body in the vicinity where both ends of the web come into contact, and the web is not smeared with ink remaining in the area.

[Brief explanation of drawings]

FIG. 1 is a front view of a guide roller reciprocating mechanism according to a first embodiment of the present invention, FIG. 2 is a side view of the wheel portion of FIG. 1, and FIG. 3 is a guide according to a second embodiment of the present invention. FIG. 4 is a front view of the guide roller reciprocating mechanism which is a modification of the second embodiment, and FIG. 5 is a side view of the newspaper rotary press. DESCRIPTION OF SYMBOLS 1... Paper feed stand, 3... Web, 4... Guide roller, 4a... Guide roller main body, 5... Printing unit, 10... Roller shaft, 20... Guide roller reciprocating mechanism, 21... Link, 23... Wheel, 30... Book Machine frame, 40... Drive unit, 100... Operating lever, 120... Reciprocating motion generating device.

Claims (1)

[Scope of Claims] 1. In a cleaning device for a guide roller in which a guide roller body is fitted to a roller shaft so as to be rotatable but not slidable on the shaft, the guide roller body is attached to a non-movable member of the machine, and the roller shaft is The guide roller reciprocating mechanism is provided with a guide roller reciprocating mechanism that gives reciprocating motion in the axial direction and reciprocates the entire guide roller in the axial direction. A web guide roller cleaning device characterized in that the drive section of the guide roller reciprocating mechanism is operated after the web guide roller is lowered and printing is interrupted. 2. The web guide according to claim 1, wherein the guide roller reciprocating mechanism includes means for generating rotational power, means for converting rotational motion into linear reciprocating motion in the roller axis direction, and the roller shaft is connected to the converting means. Roller cleaning equipment. 3. The web guide roller cleaning device according to claim 1, wherein the guide roller reciprocating mechanism includes means for generating reciprocating power, and the roller shaft is connected to a drive shaft of the means.