JP3015417U - Ink deposition device for printing rolls - Google Patents

Abstract

(57) [Abstract] [Purpose] The finisher roll actively adheres to the aluminum printing roll and rotates together with it to attach ink to the printing roll, eliminating the troublesome positioning of the finisher roll. Ink deposition device for printing rolls. [Structure] The printing roll 2 is made of aluminum and has a pair of iron rings 6 and 6 which are concentrically fixed to both inner ends. The finisher roll 4 has a pair of magnets 7, 7 at both ends of the inside so that the outer surface side is the N pole or the S pole and the center side is the S pole or the N pole. The pair of magnets 7, 7 at both ends of the finisher roll 4 attracts magnetic force to the pair of iron rings 6, 6 at both ends of the printing roll 2 so that the finisher roll 4 comes into contact with the printing roll 2 and the finisher rotates as the printing roll 4 rotates. The roll 4 rotates together and the ink is attached to the printing roll 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ink adhering device for a printing roll, in which a finisher roll housed in an ink tray of a printing machine and floating with ink is brought into contact with the printing roll and rotated together to adhere the ink to the printing roll.

[0002]

[Prior art]

 In the conventional ink adhesion device for aluminum printing rolls, magnets are attached inside both ends of the finisher roll, and a plurality of magnets are arranged so as to magnetically repel the side of the finisher roll opposite to the printing roll. The structure was such that the finisher roll was biased toward the printing roll (Jpn. Kokai 4-39006). Another conventional ink adhering device for aluminum printing rolls has a structure in which both end shafts of the finisher roll are urged toward the printing roll by springs such as wires (actual application). No. 2-88127).

[0003]

[Problems to be solved by the device]

 The ink adhering device for aluminum printing rolls utilizing the magnetic repulsion described above is used to replace a plurality of magnets arranged so as to repel magnetic force to the side of the finisher roll opposite to the printing roll each time the printing roll is replaced. It was very troublesome because it had to be adjusted according to the length and diameter of the printing roll. Particularly troublesome is that when the print roll is removed, the finisher roll is largely separated from the side magnets due to the magnetic repulsion, and is positioned on the other side of the print roll to be replaced. Therefore, it was necessary to remove the side magnets before removing the printing roll. Further, the ink adhering device for the aluminum printing roll that utilizes the spring bias like the wire described above was very troublesome because the spring position had to be adjusted each time the printing roll was replaced. .

The present invention has been devised in view of the above-mentioned point, and the finisher roll is actively adhered to the aluminum print roll and rotated together to attach the ink to the print roll. It is an object of the present invention to provide an inking device for a roll.

[0005]

[Means for Solving the Problems]

 According to the present invention, a finisher roll of a hollow cylinder, which is housed in an ink tray and floats in ink and whose inside is hermetically sealed, rotates in contact with a printing roll to rotate and attach ink to the printing roll. In the ink adhering device of the roll, the printing roll is made of aluminum and has a pair of iron rings concentrically fixed to both ends inside, and the finisher roll has an N pole or S pole on the outer side at the inner ends and a center. An ink adhering device for a printing roll is provided, which has a pair of magnets so that the side has an S pole or an N pole.

[0006]

[Action]

 When the pair of magnets on both ends of the finisher roll attracts magnetic force to the pair of iron rings on both ends of the printing roll, the finisher roll comes into contact with the printing roll, and the finisher roll rotates together with the rotation of the printing roll, and the ink is printed on the printing roll. To attach.

[0007]

【Example】

 An embodiment of an ink adhering device for a printing roll according to the present invention will be described with reference to FIGS. The ink adhering device of the printing roll is in contact with the printing roll 2 which is in contact with the printing roll 2 below the rolling roll 1 around which the raw paper P is wound, and is accommodated in the ink tray 3. The finisher roll 4 is floated with ink and the doctor 5 for scraping off the excess ink adhering to the printing roll 2 is provided. The printing roll 2 is made of aluminum and has a pair of iron rings 6 and 6 which are concentrically fixed to both ends of the inside, as shown in FIG. 1 (b) or (c). The finisher roll 4 is a hollow cylindrical body that is housed in the ink tray 3 and that has an inside closed to float on the ink. The finisher roll 4 is supported at both ends by a chuck cone of the printing machine and is driven to rotate. The finisher roll 4 is a hollow plastic cylinder, and as shown in FIG. 1 (d), eight permanent magnets are evenly arranged in an arc shape on both ends of the inside, and the outer surface side is the north pole or the south pole. A pair of magnets 7 and 7 are provided so that the side has an S pole or an N pole. The finisher roll 4 is wound around the right and left halves of the outer peripheral surface in a right-handed and left-handed manner and temporarily fixed, and then covered with a heat-shrinkable plastic film tube and heated to make the tube hollow. A pair of spiral ridges 4a and 4b, which are formed by contracting and closely contacting the cylindrical body and the strip-shaped member, are wound in opposite directions, and have a function of stirring the ink. The doctor 5 scrapes off excess ink adhering to the printing roll 2 by contacting the front end portion of the doctor at a position behind the finisher roll 4 in the rotation direction of the printing roll 2.

Next, the operation of the printing roll ink adhering device of the above embodiment will be described. After the printing roll 2 is chucked at both ends by the chuck cone of the printing machine, ink is supplied to the ink tray 3, and the finisher roll 4 having the same length as the printing roll 2 is housed in the ink tray 3. Then, the pair of magnets 7, 7 at both ends of the finisher roll 4 attracts magnetic force to the pair of iron rings 6, 6 at both ends of the print roll 2 so that the finisher roll 4 comes into contact with the print roll 2 to rotate the print roll 2. Along with this, the finisher roll 4 rotates together and the pair of spiral ridges 4a and 4b satisfactorily adhere the ink to the printing roll while stirring the ink.

[0009]

[Effect of device]

 As described above, according to the ink applicator for a printing roll of the present invention, the finisher roll is actively adhered to the aluminum printing roll and is rotated together to adhere the ink to the printing roll. This eliminates the need for installing magnets and springs corresponding to the finisher roll, which was required when replacing the print roll in the past, and the troublesome positioning of the finisher roll is eliminated. Further, the printing roll ink adhering device of the present invention utilizes magnetic attraction between iron and a magnet.However, an iron ring is provided at both inner ends of the printing roll and magnets are provided at both inner ends of the finisher roll. Since the iron ring and magnet are not installed in the opposite relationship to the printing roll and finisher roll, the iron powder contained in the ink liquid is adsorbed to the printing roll and the excess ink adhering to the printing roll is removed by the doctor. At the time of scraping, the inconvenience of being difficult to scrape is avoided.

[Brief description of drawings]

1 is a schematic side view of an ink deposition device for a printing roll according to an embodiment of the present invention, (a) is a schematic side view, and (b) and (c) are different embodiments of the printing roll according to the embodiment I- I sectional view, (d) is a principal part sectional view of the finisher roll.

[Explanation of symbols]

 2 ... Printing roll, 3 ... Ink tray, 4 ... Finisher roll, 6 ... Iron ring, 7 ... Magnet,

Claims (1)

[Scope of utility model registration request] 1. A printing roll adapted to come into contact with a printing roll and rotate together with a finisher roll, which is a hollow cylindrical body which is housed in an ink tray and floats in the ink and is hermetically sealed, to adhere the ink to the printing roll. In the ink adhering device of No. 3, the printing roll is made of aluminum and has a pair of concentrically fixed iron rings at both ends inside, and the finisher roll has an N pole or S pole on the outer side and a center side on the inner ends. An ink adhering device for a printing roll, which has a pair of magnets so as to have an S pole or an N pole.