JPH0730364Y2 - Cylinder cleaning device for printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cylinder cleaning device for a printing machine, which cleans the peripheral surface of the cylinder of the printing machine with a cleaning liquid while rotating the cylinder.

[Conventional technology]

An example of this type of cylinder cleaning device is Japanese Patent Laid-Open No. 63-37.
The one disclosed in Japanese Patent No. 945 is known. This cylinder cleaning device is equipped with a magazine roller and a take-up roller which are held by a holder and arranged in parallel in the circumferential direction of the impression cylinder. The cleaning cloth wound around the magazine roller is taken up by the take-up roller. As a result, the impression cylinder is configured to travel in a direction opposite to the circumferential direction. The scraper supported by the holder has its tip facing the impression cylinder side in the center of the direction of travel of the running cleaning cloth, and the scraper is pushed out in the radial direction of the impression cylinder to remove the cleaning cloth. It is configured to be pressed against the peripheral surface of the impression cylinder via. In the vicinity of the scraper, a cleaning liquid supply device having a nozzle opened near the tip of the scraper is provided.

With this configuration, when the cleaning cloth is run while the impression cylinder is rotated and the cleaning liquid is supplied to the cleaning cloth, dirt and dust on the impression cylinder peripheral surface are pressed against the impression cylinder peripheral surface by the scraper. The cleaning cloth and the cleaning liquid supplied thereto are wiped off and the dirty cleaning cloth is wound up.

[Problems to be solved by the device]

However, in such a conventional cylinder cleaning device, since dirt is wiped off with a cleaning cloth pressed by only one scraper, dirt that is difficult to remove may remain on the impression cylinder. There was a problem that I could not expect. Further, since the instrument for supplying the cleaning liquid to the cleaning cloth is a direct spray, there is a problem that the distribution of the cleaning liquid is not uniform and some stains remain.

[Means for Solving the Problems]

In order to solve such a problem, in the present invention, two scrapers, whose tips are in contact with the circumferential surface of the cylinder via a cleaning cloth, are arranged in parallel in the circumferential direction of the cylinder, and the space between the two scrapers is increased. A cleaning liquid supply device for supplying the cleaning liquid to the cleaning cloth of 1. was provided.

According to the second aspect of the invention, the cleaning liquid is supplied from the cleaning liquid supply device between the two scrapers, and the porous elastic body that contacts the cleaning cloth and presses the cleaning cloth against the cylinder is interposed.

[Action]

When the cleaning cloth is run while the cylinder is rotating and the cleaning liquid is supplied between the two scrapers arranged at a distance, dirt and dust attached to the cylinder are removed by the first scraper from the circumference of the cylinder. The dirt and the like remaining on the cylinder peripheral surface are wiped off by the cleaning cloth pressed against the cylinder peripheral surface by the second scraper and left on the cylinder peripheral surface. Never.

Further, in the case where the porous elastic body is provided between the two scrapers, since the cleaning liquid wets the porous elastic body and then the cleaning cloth, the cleaning liquid spreads evenly to each part of the cleaning cloth, The function of removing dirt and the like is further improved.

〔Example〕

1 is a side view showing an embodiment of a cylinder cleaning device for a printing press according to the present invention. In the figure, an impression cylinder 1 that is rotationally driven from the driving side is mounted between the left and right frames, and a support shaft 2 is supported above the left and right frames between the left and right frames. A lever shaft 3 is supported laterally of the impression cylinder 1, and further below the lever shaft 3, there are a large diameter portion 4a and a small diameter portion.
A cam 4 having 4b is arranged to be rotationally driven from the driving side. The free end of the lever 5 rotatably supported by the support shaft 2 in the axial direction is restricted, and L is rotatably supported by the lever shaft 3 in the axial direction. The free end of the L-shaped lever 6 is connected to both ends by a connecting lever 7 which is pivotally attached at both ends. Also, L-shaped lever 6
The cam follower 8 pivotally attached to the other free end of the above is pressed against the cam surface of the cam 4 by a spring member (not shown). With this configuration, when the cam 4 rotates, the L-shaped lever 6 swings, and the lever 5 swings via the connecting lever 7.

A substantially triangular support plate 9 is fixed to the lever 5, and a tip end of the support plate 9 on the impression cylinder 1 side is supported by the support plate 9.
The scrapers 10 and 11 are arranged side by side at predetermined intervals in the circumferential direction of the impression cylinder 1. A cleaning cloth 12 is driven by a drive device (not shown) and includes two scrapers 10,1.
The scrapers 10 and 11 are configured to be pressed against the peripheral surface of the impression cylinder 1 through the running cleaning cloth 12 while passing between the tips of the scrapers 1. A plug 13 connected to a water supply source (not shown) by a hose or the like is fixed to the support plate 9, and the other end of the pipe 14 whose one end is fixed to the plug 13 has a scraper 10 and a scraper 11. Between the
Nozzle 15 is installed. Reference numeral 16 denotes a claw provided so as to slightly project from the peripheral surface of the plate cylinder 1.

The operation of the impression cylinder cleaning device configured as described above will be described. When the cleaning work is started while the impression cylinder 1 is rotated at a low speed and the cleaning cloth 12 is run, and the cleaning liquid is jetted from the nozzle 15, the dirt adhered to the peripheral surface of the impression cylinder 1 becomes The cleaning cloth 12 pressed against the circumferential surface of the body by the scraper 10 is scraped off, transferred to the cleaning cloth 12 and conveyed while being wiped off by the cleaning cloth 12 moistened with the cleaning liquid ejected from the nozzle 15. Finally, since the dirt and the like remaining on the impression cylinder 1 side are scraped off by the cleaning cloth 12 pressed against the cylinder circumferential surface by the second scraper 11, they do not remain on the circumferential surface of the impression cylinder.

In such a cleaning operation, when the claw 16 protruding from the peripheral surface of the impression cylinder 1 corresponds to the scrapers 10 and 11, the cam follower 8 faces the large diameter portion of the cam 4, so that the L-shaped lever 6 and the connecting lever 7 are provided. Since the lever 5 swings via the lever 5, the entire cleaning device integrated with the lever 5 moves in a direction away from the impression cylinder 1, and the pawl 16 passes through the scrapers 10 and 11 without coming into contact therewith.

Further, according to the second aspect of the present invention, a pad made of a porous elastic body is filled between the scrapers 10 and 11 which are the space portions in the first aspect of the invention, and the cleaning liquid ejected from the nozzle 15 is Supplied to the pad. The cleaning cloth 12 is pressed against the peripheral surface of the impression cylinder 1 by this pad.

With such a configuration, the cleaning liquid ejected from the nozzle 15 is supplied to the pad formed of the porous elastic body to sufficiently wet it, and both scrapers 10 elastically held by the pad are provided. Since the cleaning cloth 12 between the nozzles 11 and 11 is sufficiently moistened, the cleaning function is improved, and dirt does not remain on the peripheral surface of the impression cylinder 1.

If the supply of the cleaning liquid to the pad is stopped, it will be wiped dry.

[Effects of the Invention] As is clear from the above description, according to the present invention, in the cylinder cleaning device of a printing press, two scrapers whose tips are brought into contact with the peripheral surface of the cylinder through a cleaning cloth are used to form a circle of the cylinder. By arranging in parallel in the circumferential direction and providing a cleaning liquid supply device for supplying the cleaning liquid to the cleaning cloth between these two scrapers, the cleaning cloth scraped by the cleaning cloth pressed against the cylinder peripheral surface by the first scraper is scraped off. The dirt and dust that has been collected is wiped off with a cleaning cloth that follows it, and then scraped off with a cleaning cloth that is pressed by the second scraper. Is greatly improved.

Further, in the invention according to claim 2, the cleaning liquid is supplied from the cleaning liquid supply device between the two scrapers, and the porous elastic body that contacts the cleaning cloth and presses the cleaning cloth against the cylinder is inserted. The cleaning liquid can be uniformly and sufficiently supplied to the cleaning cloth between the scrapers, a strong scraping effect can be obtained, and the cleaning cloth can be elastically adhered to the cylinder peripheral surface, further improving the cleaning function. .

[Brief description of drawings]

1 is a side view showing an embodiment of a cylinder cleaning device for a printing press according to the present invention. 1 ... impression cylinder, 10,11 ... scraper, 12 ... cleaning cloth, 15
……nozzle

Claims (2)

[Scope of utility model registration request] Claims: 1. Two scrapers, the ends of which are in contact with the peripheral surface of a cylinder via a cleaning cloth, are arranged in parallel in the circumferential direction of the cylinder, and a cleaning liquid is applied to the cleaning cloth between the two scrapers. A cylinder cleaning device for a printing machine, comprising a cleaning liquid supply device for supplying the liquid. 2. A cylinder cleaning device for a printing press according to claim 1, wherein a cleaning liquid is supplied between two scrapers from a cleaning liquid supply device, and the porous elastic body contacts the cleaning cloth and presses the cleaning cloth against the cylinder. A cylinder cleaning device for a printing machine, characterized by being inserted.