JPS5954036B2 - How to manufacture an offset rotary press from a letterpress rotary press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an offset rotary press from a letterpress rotary press.

Various manufacturing methods of this type have been proposed in the past, but all of them have problems such as requiring many parts and being uneconomical, and requiring a long period of time to manufacture. There were drawbacks such as the inability to obtain a fully satisfactory rotary press. This invention eliminates the drawbacks of the above-mentioned conventional rotary presses, and provides a manufacturing method that makes it possible to obtain an offset rotary press by using most of the parts used in existing letterpress rotary presses and making only slight modifications. The purpose is to

The present invention will be described with reference to embodiments shown in the drawings.

Figures 1 and 2 show an existing letterpress rotary press 31 before modification according to the present invention, in which 32 and 33 are the first set of plate cylinders and impression cylinders, and 32a and 33a are the second set of plate cylinders. impression cylinder,
34 and 35 are rollers, 36 and 37 are ink cylinders,
38 is a rubber roller, 39 is an ink supply rail, 40,
41 is an ink cylinder reciprocating drive gear, 42 is a crankshaft, 43 is a monochrome printing plate cylinder, 44 to 47 are guide rollers,
Further, 48 is a motor, 49 is a vertical drive shaft connected to the output shaft 50 of the motor 48 via bevel gears 51, 52 and cycle exchange gears 53, 54, and equipped with a bevel gear 55 at the upper end; Together with the helical gear 57, the impression cylinder 33a
The bevel gears 58 and 59 are coaxially attached to the impression cylinder 33 and mesh with the bevel gear 55, and the former is coaxially attached to the impression cylinder 33 and meshes with the helical gear 60, and the latter is a helical gear. Transmission helical gears 61 and 62 that mesh with the θ wheel 57, respectively
is a helical gear that is coaxially attached to the plate cylinders 32 and 32a and meshes with the helical gears 60 and 57, respectively; 63 is a drive gear for the monochrome printing plate cylinder 43; 64 is an ink cylinder rotation drive gear; 65 is an ink supply! 5-supply pump drive chain wheel, 66 a gear rotated by a gear 64 via an intermediate gear 68, 69 a bearing fixed to the main engine frame 70 and supporting the cylinder, rollers, etc., 71 fitted into the bearing 69 and shown in the figure. The plate cylinders 32, 32 are operated by actuating members such as non-operating cylinders.
72 is a roller socket; 72a is a bearing for the entrance rollers 34, 35 provided in the roller socket 72; 73, 7;
4 is an auxiliary machine frame attached to the outer surface of the main machine frame 70 and houses a transmission mechanism such as a gear; 75 is a vertical center line of the main machine frame 70.

Therefore, when the motor is driven, the first set of plate cylinders 32 and impression cylinders 33 and the second set of plate cylinders 32a and impression cylinders 33a are rotated in the direction of the arrow, thereby causing the traveling paper rising from the guide rollers 44 to rotate. P passes through the guide roller 45 to the first set of plate cylinders 32.
and the impression cylinder 33 to print one side Pa (for example, the 2nd and 3rd pages of a 4-page newspaper). The other one side Pb (1st and 2nd page sides) is printed on the sheet, and the sheet is led to the next step via a guide roller 47. 3 and 4 show an offset rotary press 1 obtained according to the present invention, which is a slightly modified version of the letterpress rotary press 31.
The same reference numerals as in FIG. 2 will be used to omit the explanation.

Next, we will explain the main points of the modification.

(1) 2 and 3 are the first set of plate cylinder and blanket cylinder, 2a
, 3a are the second set of plate cylinders and blanket cylinders, which are the first set of plate cylinders and impression cylinders 32, 33, and the second set of plate cylinders and impression cylinders 32.
In particular, both ends of the first set of plate cylinder 2 and blanket cylinder 3 are cut to a predetermined length within the width of the main machine frame 70.

Incidentally, instead of this cutting, the first set of plate cylinder 2 and blanket cylinder 3 may be prepared separately. This case is suitable when the offset rotary press 1 is to be remodeled again to the letterpress rotary press 31. (2) 4 and 5 are auxiliary machine frames that are attached to the inner surface of the main machine frame 70 and house transmission mechanisms such as gears;
The machine frames 4 and 5 are the first set of plate cylinder 32 and impression cylinder 3 before modification.
3, that is, the plate cylinder 2 and blanket cylinder 3 of the first set are moved laterally as a pair, and the blanket cylinder 3 is brought into contact with the blanket cylinder 3a of the second set. A bearing 6 is provided to support it in position.

(3) Denoted at 7 and 8 are eccentric sleeves that fit into the bearing 6 and are attached to the auxiliary machine frames 4 and 5. These sleeves 7 and 8 are actuated by actuating members (not shown), and the former 7 is connected to the adjacent blanket. cylinder 3a and plate cylinder 2, and the latter 8 as blanket cylinder 3.
It is said that it is possible to come into contact with and separate from it.

(4) Reference numeral 9 denotes an eccentric sleeve that fits into the bearing 72a before remodeling and is attached to the roller socket 72. Similarly to the above, this sleeve 9 is moved into and out of contact with the adjacent plate cylinder 2 by means of an operating member (not shown). It is considered possible.

(5) 10, 11, 12 are plate cylinder 2 and blanket cylinder 3
, 3a are helical gears attached to one end of each,
These are housed in the auxiliary machine frame 4 on one side while meshing with each other.

(6) 13 is a gear attached to the other end of the plate cylinder 2,
This gear 13 is housed in the auxiliary machine frame 5 on the other side together with a gear 14 that meshes with it, and is connected to an ink cylinder rotation drive gear 64 via a shaft 15.

(7) 16 is a guide roller, and guide rollers 45 to 4
It will be placed along with the removal of 7.

(8) ] 7 is a bevel gear, which is arranged by inverting the bevel gear 55 before remodeling in order to rotate the blanket cylinder 3a in the opposite direction.

(9) 18 is a dampening water device attached to the inside of the main engine frame 70, and this device 18 includes a water tray 19, a rotating brush roller 2
0. Water adjustment end plate 21 to adjust the amount of water splashed. water roller 2
It consists of 2.

By modifying as described above, when the motor 48 is driven, the first set of plate cylinders 2 and blanket cylinders 3 and the second set of plate cylinders 2a and blanket cylinders 3a are rotated in the direction of the arrow, thereby rotating the running paper P. When passing from below through the guide roller 44 and between the blanket cylinder 3 and the blanket cylinder 3a via the guide roller 16, both sides Pab (for example, pages 1 and 2 on one side of a 4-page newspaper and pages 3 and 4 on the other side) are printed simultaneously.

At this time, the direction of rotation of each cylinder is opposite to that before the modification. The helical gears 61 and 60, which were attached to the first set of plate cylinders 32 and impression cylinders 33 before the modification, remain rotatably supported after the modification, and the ink cylinder reciprocating drive gears 40 and 4
1 is also used as is without any changes. Furthermore, since the monochrome printing cylinder 43 does not need to be changed during remodeling, monochrome printing can be performed in the same way as before. As explained above, according to the present invention, the first set of plate cylinders and impression cylinders and the second set of impression cylinders of a letterpress rotary press are removed, and an auxiliary machine frame is arranged on the inner surface of both main machine frames. A second set of blanket cylinders for the offset rotary press is disposed between the auxiliary machine frames at the position where the second set of impression cylinders was located, and a first set of plate cylinders and blanket cylinders for the offset rotary press are disposed; The blanket cylinders are arranged adjacent to the blanket cylinders, and one end of the three cylinders is connected via a gear transmission mechanism, and one end of the second set of blanket cylinders is connected to a drive shaft. It is possible to manufacture an offset rotary press very easily and in a short period of time by just making a slight modification such as connecting the other end of the plate cylinder to the first set of ink cylinder rotation drive gears via a gear transmission mechanism. In this case, many parts of the existing letterpress rotary press, such as the drive mechanism including the drive motor and the ink cylinder rotary drive gear, can be used as they are without having to be disposed of, and this has the excellent effect of being economical. It is something.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of an existing letterpress rotary press, Fig. 2 is a schematic cross-sectional plan view showing the main parts of Fig. 1 in an expanded form;
FIG. 3 is a schematic side view of an offset rotary press obtained by the present invention, and FIG. 4 is a schematic cross-sectional plan view showing essential parts of the offset rotary press in an expanded state. ]...offset rotary press, 2, 2a...first and second plate cylinders, 3,3a...first and second blanket cylinders,
4, 5... Auxiliary machine frame, 6... Bearing, 7, 8, 9...
・Eccentric sleeve, ]0, 11, ]2... helical gear,
13, ]4... Gear, 15... Shaft, ]6... Guide roller, 17... Bevel gear, 18... Dampening water device, 48... Motor, 49... Drive Shaft, P...running paper.

Claims (1)

[Claims] 1 A pair of main machine frames are arranged facing each other, and between the main machine frames, a first set of plate cylinder and impression cylinder and a second set of plate cylinder and impression cylinder are arranged symmetrically with respect to the vertical center line of the main machine frame. In a letterpress rotary press, which is arranged in
The first set of plate cylinders and impression cylinders and the second set of impression cylinders are removed, and the auxiliary machine frames 4 and 5 are arranged on the inner surface of both the main machine frames 70, and between the auxiliary machine frames, the second set of plate cylinders and impression cylinders are removed. The second set of blanket cylinders 3 for the offset rotary press are placed in the position where the impression cylinders were located.
Further, a first set of plate cylinder 2 and blanket cylinder 3 for an offset rotary press is arranged adjacent to the blanket cylinder 3a, and one end of the three cylinders 2, 3, 3a is connected to a gear transmission mechanism. The blanket cylinder 3a
An offset wheel from a letterpress rotary press characterized in that one end of the plate cylinder 2 is connected to the drive shaft, and the other end of the plate cylinder 2 is connected to a first set of ink cylinder rotation drive gears 64 via a gear transmission mechanism. Method of manufacturing turning points.