JP3331008B2 - Contact pressure adjustment device for the landing roller of rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the contact pressure of a landing roller on a plate cylinder of a rotary printing press.

[0002]

2. Description of the Related Art In a rotary printing press, as shown in FIG. 3, ink supplied to an ink fountain 1 is taken out by rotation of a fountain roller 2, kneaded and stretched to a uniform thickness by a kneading roller group 3, and gold is deposited. It is supplied to the plate cylinder 6 via the roller 4 and the application roller 5. The surface of the forming roller 5 is covered with rubber from the viewpoint of protecting the plate surface of the plate cylinder 6 and transferring ink to the plate surface. ◆ In such a rotary printing press,
At the time of printing, the application roller 5 is brought into contact with the plate cylinder 6 with an appropriate pressure, and when the application roller 5 or the image cylinder 6 is replaced, or at the time of washing when ink is exchanged, the application roller 5 is separated from the plate cylinder 6. It becomes necessary.

A contact pressure adjusting device as shown in FIGS. 4 and 5 has been proposed in order to bring the application roller 5 into contact with and away from the plate cylinder 6. In the figure, a support shaft 8 is rotatably supported by a frame 7 of a rotary printing press that rotatably supports the charging roller 4 via a bearing 9. Lever 10 and 11 are fixed to this support shaft 8. A cylinder 12 rotatably supported by the frame 7 is rotatably coupled to one end of the lever 9 via a pin 13. Bearing lever 14 rotatably supported by the bearing 9
At one end, a receiving roller 5 is rotatably supported so as to contact the receiving roller 4 with a predetermined pressure. The lever 11 and the bearing lever 14 are provided with pins 15, 16 respectively.
Are provided, and are connected to the pins 15 and 16 by a turnbuckle 17 rotatably fitted thereto.

In such a configuration, the cylinder 12 is operated, and the support shaft 8 is rotated via the lever 10 so that the application roller 5 contacts and separates from the plate cylinder 6. The contact pressure of the application roller 5 with respect to the plate cylinder 6 is adjusted by turning the turn buckle 17 and changing the distance between the pins 15 and 16.

[0005]

Due to the friction between the plate cylinder and the paper generated during printing and the heat generated by the friction between the depositing roller 4 and the plate cylinder 6, the deposition roller 5 and the plate cylinder 6 expand, and the The contact pressure of the application roller 5 changes, causing unevenness in density of the printed matter. For this reason, when the printed matter changes more than the allowable limit, it is necessary to adjust the contact pressure of the setting roller 5 with respect to the plate cylinder 6 by turning the turnbuckle 17. At this time, the turnbuckle 17 is rotated by the charging roller 4 rotating at a high speed.
In this case, the rotary printing press is stopped and the contact pressure is adjusted, thereby reducing the efficiency of the printing operation.

In view of the above circumstances, an object of the present invention is to provide a rotary press capable of adjusting the contact pressure of the setting roller 5 with respect to the plate cylinder 6 without stopping the rotary printing press, thereby improving the efficiency of the printing operation. An object of the present invention is to provide a contact pressure adjusting device for a landing roller of a printing press.

[0007]

In order to achieve the object of the upper furnace, according to the present invention, a charging roller disposed in parallel with a plate cylinder at a predetermined interval, and the charging roller is rotatably supported. A pair of bearing levers rotatably supported by the bearing,
A contact pressure adjusting device for a rotary roller of a rotary printing press, which is rotatably supported by the bearing lever and includes a rotary roller for supplying ink to the plate cylinder, and rotatably supported by a frame of the rotary rotary press. An eccentric bearing, a drive mechanism for rotating the eccentric bearing, a support shaft rotatably supported by the eccentric bearing in parallel with the charging roller, and a support shaft via a lever fixed to the support shaft. A driving means for rotating and a rod rotatably connected to the bearing lever and a lever fixed to the support shaft are provided.

[0008]

By operating the drive mechanism and rotating the eccentric bearing, the position of the support shaft is changed to adjust the contact pressure of the setting roller with respect to the plate cylinder.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In this figure, the same components as those in FIGS. 4 and 5 are denoted by the same reference numerals. Reference numeral 18 denotes an eccentric bearing, which is rotatably supported by the frame 7. The eccentric bearing 18 rotatably supports the support shaft 8 at a position eccentric from the center of rotation. Reference numeral 19 denotes a worm gear.
It is fixed to an eccentric bearing 18. A bearing 20 is fixed to the frame 7. A drive shaft 21 is rotatably supported by the bearing 20. A worm 22 is fixed to the drive shaft 21 so as to mesh with the worm gear 19. A handle 23 is fixed to one end of the drive shaft 21. Reference numeral 24 denotes a rod, which connects the bearing lever 14 and the lever 11 via pins 15 and 16.

In such a configuration, when the handle 23 is turned, the eccentric bearing 18 is rotated via the worm 22 and the worm gear 19. Then, the position of the support shaft 8 is changed, the bearing lever 14 is rotated via the lever 11 and the rod 24, and the contact pressure of the application roller 5 with respect to the plate cylinder 6 can be changed.

This operation can be performed during operation of the rotary printing press because the handle 23 is outside the frame 7. Therefore, when adjusting the contact pressure, it is possible to prevent the efficiency of the printing operation from being lowered by stopping the rotary printing press, and to improve the efficiency of the printing operation.

[0012]

As described above, according to the present invention, the receiving roller is disposed rotatably at a predetermined distance from the plate cylinder, and is rotatably supported by the bearing that rotatably supports the receiving roller. A contact roller adjusting device for a rotary printing press, comprising a pair of bearing levers, and a rotary roller rotatably supported by the bearing levers and supplying ink to the plate cylinder. An eccentric bearing rotatably supported on the eccentric bearing, a driving mechanism for rotating the eccentric bearing, a support shaft rotatably supported on the eccentric bearing in parallel with the charging roller, and fixed to the support shaft. Since the driving means for rotating the support shaft via the lever, the bearing lever, and the rod rotatably coupled to the lever fixed to the support shaft are provided, the efficiency of the printing operation can be improved. .

[Brief description of the drawings]

FIG. 1 is a front view of a contact pressure adjusting device for a landing roller of a rotary printing press according to the present invention.

FIG. 2 is a cross-sectional side view of the development of the contact pressure adjusting device of the landing roller of the rotary printing press in FIG.

FIG. 3 is a configuration diagram illustrating an ink supply path in the rotary printing press.

FIG. 4 is a front view of a contact roller pressure adjusting device of a conventional rotary printing press.

FIG. 5 is a side sectional view in which a contact pressure adjusting device of a landing roller of the rotary printing press in FIG. 4 is developed.

[Explanation of symbols]

 Reference Signs List 4 receiving roller 5 receiving roller 6 plate cylinder 7 frame 11 lever 14 bearing lever 18 eccentric bearing 19 worm gear 21 drive shaft 22 worm 23 handle 24 rod

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B41F 31/30

Claims (1)

(57) [Claims] A charging roller disposed in parallel with the plate cylinder at a predetermined interval; a pair of bearing levers rotatably supported by bearings rotatably supporting the charging roller; An eccentric bearing rotatably supported and rotatably supported by a frame of the rotary printing press, the contact pressure adjusting device for the rotary roller of the rotary printing press having a coating roller for supplying ink to the plate cylinder, A drive mechanism for rotating the eccentric bearing, a support shaft rotatably supported by the eccentric bearing in parallel with the charging roller, and a drive means for rotating the support shaft via a lever fixed to the support shaft And a contact pressure adjusting device for a landing roller of a rotary printing press, comprising: a bearing lever; and a rod rotatably coupled to a lever fixed to the support shaft.