JPH01204740A - Apparatus for automatically washing web guide roller - Google Patents

Abstract

PURPOSE:To automatically wash the surface of a web guide roller, by separating the web guide roller from a drive source during printing to make the same freely rotatable by a web and connecting said guide roller to the drive source at the time of washing to reversely rotate the same. CONSTITUTION:A web guide roller 4 is contaminated with ink with the elapse of a printing time to become a state requiring washing. When the web guide roller 4 reaches this state, the operation speed of a printing press is lowered, and a blanket cylinder 7 and a plate cylinder 8 are separated from a web 3 to stop printing. Since the route of the web 3 is held as it is and the web 3 is pulled by a drag roller 9, the web 3 is not printed but folded in a blank stage by a folding machine 10 to be fed out of the machine by a delivery conveyor. In starting the washing of the web guide roller 4, when the control apparatus 12 of an automatic washing apparatus is started, a washing solution is applied to the web guide roller 4 and, at the same time, said web guide roller 4 is reversely rotated by the motor 24 mounted in said roller 4, and the contaminant bonded to the web guide roller 4 is washed with the running web 3 to clean the surface of said roller 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to printing machines, and more particularly to an automatic web guide roller cleaning device for a rotary printing press that uses a large number of web guide rollers for guiding a web.

[Conventional technology]

Web guide rollers that guide the web (running paper) running through a printing machine during the printing process become contaminated with ink, paper dust, etc. as printing time progresses. When the web guide roller becomes dirty, the dirt is transferred to the printed paper surface, reducing the product value. Therefore, in the case of a newspaper spindle machine, printing work is interrupted and nine workers manually clean each web guide roller with a cloth dampened with cleaning oil in order to clean the dirt attached to the web guide roller. are doing.

[Problem that the invention seeks to solve]

In printing machines such as newspaper rotary machines, which have more than 100 web guide rollers in one series.

As already mentioned, cleaning each web guide roller manually requires a great deal of effort, and cleaning web guide rollers located at a high place is dangerous. Depending on the location where the web guide roller is installed, it may be difficult for an operator to reach, or the location may be narrow, making it difficult to work there.

The present invention provides means for eliminating the inconvenience of cleaning the web guide roller by hand.

[Means for solving problems]

The above purpose is to guide the web of printing machines, paper processing machines, etc.
A plurality of web guide rollers each having a built-in motor that enables reverse drive, a reducer that reduces the rotational speed of the motor, and means for coupling and detaching the output shaft of the reducer from the frame, and each of the web guides. means for applying a cleaning liquid to the roller; and selection means for predetermining and selecting a forward or reverse rotation direction of the motor in response to various changes in the traveling route of the web.

This is achieved by having the following.

[Effect]

When cleaning the web guide roller, the web feed speed of the printing machine is slowed down and printing is stopped. When the cleaning device is activated, each web guide roller rotates freely because the output shaft of the built-in reducer and the side plate are separated, and the rollers that were driven by the web are separated from the output shaft of the reducer and the side plate. are coupled and reversed by a motor to rotate in the opposite direction to the rotation direction of the web. Since the web is still being fed in the forward direction at a slow speed, dirt on the web guide roller surface is scraped off by the web.

In this case, if a cleaning liquid is applied to the web guide roller, dirt on the surface of the web guide roller can be wiped off more effectively.

In newspaper rotary presses, the running path of the web changes depending on the summer holidays, and the web guide rollers installed at corresponding positions rotate in opposite directions. Therefore, the motor that drives the web guide roller is capable of forward and reverse rotation. The control device also programs and stores the rotation direction of each web guide roller for each web travel path, and automatically controls each web guide roller to rotate in the correct direction when each web travel path is selected. do.

[Embodiments of the invention]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a side view of the newspaper rotary machine used in this example. During normal printing, the web 3 fed from the web roll 2 of the paper feed stand 1 is guided via a number of web guide rollers 4 to the impression cylinder 6 of the multicolor printing unit 5a in the case of multicolor printing. Here Blanke Rattle 1
7, the ink transferred from the plate cylinder 8 to the blanket cylinder 7 is transferred to the web 3, and printing is repeated while the web 3 passes through the impression cylinder 6, depending on the number of colors. The web 3 on which printing has been completed is guided again by a number of web guide rollers 4, pulled by drag rollers 9, folded by a folding machine 10, and conveyed out of the machine by a delivery conveyor (not shown).

When the web guide roller 4 becomes dirty with ink as the printing time passes and requires cleaning, the operating speed of the printing press is reduced, the blanket cylinder 7 and the plate cylinder 8 are separated from the web 3, and printing is stopped. Since the path of the web 3 remains unchanged and the web 3 is pulled by the drag roller 9, the web 3 is not printed and is folded as a blank sheet by the folding machine 10.

Delivered outside the machine by a delivery conveyor.

When starting the cleaning of the web guide roller 4, the control device 12 of the automatic cleaning device is started.

The cleaning liquid is applied to the surface of each web guide roller 4, and at the same time, the built-in motor 24 reverses the rotation so that dirt adhering to the web guide roller 4 is washed away by the running web 3, resulting in a clean surface.

In a newspaper rotary machine, the running path of the web 3 changes depending on the number of pages, and the web guide roller 4 installed at a corresponding position changes its direction of rotation as shown in 4a and 4b in FIGS. 2 and 3. Invert. The web guide roller 4a shown in black in the multicolor printing unit 5a of FIG. 2 rotates clockwise in the A direction, and the web guide roller 4b shown in black in the 9-duplex-color printing unit 5b rotates counterclockwise. However, as shown in FIG. 3, when the traveling path changes, the web guide roller 4a rotates counterclockwise in the B direction, and the web guide roller 4b rotates clockwise in the A direction. Rotate. For this purpose, the motor 24 that drives the web guide roller 4 is configured to rotate in either the forward or reverse direction, and the control device 12 stores the rotation direction of each web guide roller 4 for each web traveling path. By selecting the web travel path, each web guide roller 4 is controlled to rotate in the correct rotation direction and apply the cleaning liquid.

FIG. 4 shows a cross-sectional view of the web guide roller 4 incorporating a motor, a speed reducer, and a clutch.

The web guide roller 4 has bearings 23a and 2 at both ends of the 9
3b, the web guide roller 4 is supported by the spindles 22a, 22b via the clutch 31, and even if the rotation of the spindles 22a, 22b at both ends of the web guide roller is restrained, the web guide roller 4 freely follows external forces. Rotate. A motor 24 is disposed inside the web guide roller 4, and a stator 26 of the remoter is integrally fixed to the inner wall 21 of the web guide roller body. The output shaft 27 of the motor is connected to a reducer 29 by a joint 28, and the output shaft 30 of the reducer is connected by a clutch 31, such as an electromagnetic clutch, which can be freely engaged and separated.

Support shafts 22a and 22b at both ends of the web guide roller are supported by side plates 32a and 32b, respectively, and are restrained from rotating once.

In such a structure, when the clutch 31 is activated to connect the output shaft 3o of the reducer and the support shaft 22a of the web guide roller and the motor 24 is connected, the output shaft 27 of the motor, that is, the rotor 25 is Since the web guide roller is restrained by the support shafts 22a at both ends, it does not rotate, and the stator 26 of the motor rotates relatively. That is, the web guide roller 4 is rotated. Similarly, if an attempt is made to rotate the web guide roller 4 with torque such as by hand rotating the web guide roller 4 with the clutch 31 activated and no power supplied to the motor 24, the If a speed reducer is used, the rotor 25 of the motor will be rotated at a speed increased by 50 to 100 times, and an extremely large torque will be required. Therefore, it is impossible to rotate with a small torque as the web runs, like the web guide roller of a newspaper rotary press.

However, if the clutch 31 is disconnected and the output shaft 30 of the reducer is released from the restraint, the web guide roller 4 will be moved to the bearing 23a.
, 23b allows for easy rotation.

FIG. 5 shows a sectional view of the web guide roller 4 having a different structure from that shown in FIG.

The web guide roller 4 shown in FIG.
However, in Fig. 5, there is no clutch 31, and the output shaft 30 of the reducer and the support shaft 2 of the web guide roller
2a is composed of one shaft. The spindle 22a of the web guide roller is rotatably supported on the side plate 32a via a bearing 33, and a brake mechanism 34, such as an electromagnetic brake, is provided at the end of the spindle 22a of the web guide roller. The structure is such that rotation of the spindle 22a of the web guide roller, that is, the rotor 25 of the motor, can be restrained.

〔Effect of the invention〕

According to the present invention, the web guide roller is separated from the drive source during printing so that it can be freely rotated by the web, and during cleaning, the web guide roller is connected to the drive source and reversed to remove dirt on the surface of the web guide roller by the web; Further, by providing a means for applying a cleaning liquid to the web guide roller and automatically controlling these, it is possible to automatically clean the surface of the web guide roller, and the efficiency of cleaning work can be improved.

[Brief explanation of the drawing]

FIG. 1 is a side view of a newspaper rotary press according to an embodiment of the present invention, FIG. 2 is a side view showing the running path of the web of the newspaper rotary press shown in FIG. 1, and FIG. 3 is a side view of the newspaper rotary press shown in FIG. FIG. 4 is a side view showing that the running path of the web of a newspaper rotary press changes and some of the web guide rollers are reversed; FIG. 4 is a sectional view of a web guide roller incorporating a clutch according to an embodiment of the present invention; FIG. The figure is a sectional view of a web guide roller with an external brake according to an embodiment of the present invention. 3... Web, 4... Web guide roller. 12...Control device, 24...Motor, 29...Reducer. 30... Reduction gear output shaft 2, 31... Clutch. 32...Side plate, 34...Brake mechanism agent Tatsu Unuma Figure 1 11:p3 Figure 3:φAyu-4:Ri f2shiogu')'0-)5α:Ji!
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Claims (1)

[Claims] (1) A motor that enables forward and reverse rotation to guide the web of a printing press, paper processing machine, etc., a reducer that reduces the rotational speed of the motor, and a means for coupling and detaching the output shaft of the reducer from the frame. a plurality of web guide rollers incorporating a plurality of web guide rollers, a means for applying a cleaning liquid to each of the web guide rollers, and a forward or reverse rotation direction of the motor that is predetermined and selected in response to various changes in the traveling route of the web. An automatic cleaning device for a web guide roller, comprising: a selection means for selecting a web guide roller.