JP2681476B2 - Plate exchange assisting device for rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a) Field of Industrial Use The present invention relates to a printing machine, such as a letterpress or planographic rotary printing machine, which guides and prints a paper material between a plate cylinder and an impression cylinder.
The present invention relates to a device for assisting the attachment / detachment / replacement / replacement of a printing plate on the peripheral surface of a plate cylinder from the viewpoints of saving paper and ensuring worker safety.

b) Conventional Technology Conventionally, a drive mechanism of a rotary printing press that prints a raw material, particularly a strip-shaped web of paper, by passing it between a plate cylinder and an impression cylinder is such that adjacent plate cylinders and impression cylinders always rotate together. Was configured into. That is, as shown in FIG. 5, the power of the main motor 3 is transferred to the main shaft 4, the bevel gear 5, the bevel gear 6, the vertical axis 7, the bevel gear 8, and the bevel gear 9 through the impression cylinder. At the same time when the impression cylinder 1 is rotated by being transmitted to the shaft 10, the rotation is also transmitted to the plate cylinder 2 via the gear 11 on the impression cylinder shaft 10 and the gear 13 on the plate cylinder shaft 12, and further the power is applied. Rotates the other impression cylinder 1a via the gear 14 on the impression cylinder shaft 10 and the gear 16 on the other impression cylinder shaft 15, and at the same time, the gear 17 on the other impression cylinder shaft 15 and the other plate cylinder It was placed in a relationship of rotating the other plate cylinder 2a via the gear 19 on the shaft 18. Reference numeral 20 is a web, that is, roll paper printing paper, and 21 and 22 are side frames.

Further, in the general construction of a conventional rotary printing press for newspaper printing, one folding unit is usually used as one set of three to four printing units shown in FIGS. 4 and 5.

c) Problems to be solved by the invention When a newspaper is printed, the content and composition of the newspaper are changed and printed sequentially depending on the area where the newspaper is distributed and the change in news value over time. This change is usually performed by partially replacing the printing plate during printing. Since the partial replacement of the printing plate is performed while the operation of the temporary rotary press is interrupted in the middle of printing, the stock is wound around the impression cylinders 1 and 1a in each printing unit (the fifth state). Therefore, when the plate cylinder is rotated to replace the printing plate, the impression cylinder also cooperates, and the material corresponding to the rotation is fed, causing a wasted paper.

Recently, the number of pages issued by newspapers has increased, and the overall configuration of a rotary printing press for newspaper printing has, for example, as shown in FIG. 3, one folding unit F and nine printing units P. One set and the like have begun to appear, and when printing, for example, a morning edition with such a huge organization, a part of the printing plate is partially replaced every 10 times, and each time there is a loss. Since paper is generated and it is repeated every day, the loss of paper stock caused by a partial change of the printing plate is not negligible.

On the other hand, when the plate is attached / detached and replaced, the impression cylinder adjacent to the plate cylinder also cooperates, so that there is a risk that an operator who is enthusiastic about the attachment / detachment of the plate may accidentally rotate due to the rotation of the impression cylinder.

d) Means for Solving the Problems In order to solve the above problems, the present invention relates to a plate cylinder provided with power transmission means from an adjacent impression cylinder, in which only the plate cylinder is rotated. The power transmission means is separately provided, and the above-mentioned 2
Clutch means for selectively transmitting the power of the system to the plate cylinder is provided.

e) Action According to the above configuration, by switching the clutch, power transmission to the plate cylinder is transmitted from the adjacent impression cylinder during normal printing, and the second power is transmitted only to the plate cylinder during plate replacement. It cannot be transmitted to the adjacent impression cylinder. Therefore, when printing plates are replaced, harmful useless movement of the adjacent impression cylinders is prevented.

f) Embodiment A specific embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 show a configuration example of the present invention, and reference numeral 1
Since the portions indicated by 22 to 22 have the same structure as the conventional type shown in FIGS. 4 and 5, for the description, refer to the section of the above-mentioned conventional technique. The platen cylinder 2 or 2a is rotatably supported on the frames 21 and 22 via eccentric sleeves 23.24 and 25.26, respectively, and the circumferential surface of the plate cylinder 2 or 2a is adjacent to the eccentric sleeve 1 or 2a by the rotational operation of the eccentric sleeves. It is also known that the printing pressure can be adjusted by contacting and separating from the peripheral surface of 1a, as in the conventional type.

Now, in the present invention, in relation to the plate cylinder shaft of the gears 13 and 19 for receiving power from the impression cylinder shaft provided on the plate cylinder shafts 12 and 18, the conventional type is fixed. , While being rotatably mounted via bearings 27 and 28, respectively,
Bevel gears 31 and 32 are rotatably added to the outer ends of the plate drum shafts 12 and 18 via bearings 29 and 30, respectively, and the plate drum shaft between the bevel gear 31 and the gear 13 is further increased. 12 parts, and clutch means 33 and 34, respectively, at the part of the plate cylinder shaft 18 between the bevel gear 32 and the gear 19.
For example, by spline engagement, it is mounted so that it can be displaced axially but not circumferentially. Then, the drive source 35 dedicated to the plate cylinder and
Bevel gears 37 and 38 fixed to the output shafts of 36 are respectively meshed with the bevel gears 29 and 30, and the drive sources 35
And 36 are fixed to the sides of the eccentric sleeves 24 and 26 via brackets 39 and 40, respectively.

The operation in the above configuration is as follows. First, during normal printing, as shown in FIG. 1, the eccentric sleeves 23 and 24, which rotatably support the plate cylinder shaft 12 on both side frames 21 and 22, respectively, are rotated to move the plate cylinder. While adjusting and setting so that the contact pressure between the peripheral surface of No. 2 and the peripheral surface of the adjacent impression cylinder 1 is appropriate, the clutch means 33 is used for the plate cylinder shaft 12
Along with to disengage it from bevel gear 31 and instead engage gear 13. Then, the impression cylinder shaft 10
From the gears 11, 13 and clutch means
Since the plate cylinder 2 is transmitted via 33 to the plate cylinder shaft 12 to rotate, normal printing is possible. If the same operation as described above is performed on the other plate cylinder 2a, the same operation as described above occurs. Further, the same result can be obtained by performing the sliding operation of the clutch means prior to the rotating operation of the eccentric sleeve.

Next, at the time of plate exchange, as shown in FIG. 2, the eccentric sleeves 23 and 24 are rotated to separate the peripheral surface of the plate cylinder 2 from the peripheral surface of the adjacent impression cylinder 1, while the clutch means 33 is used. Is slid along the plate cylinder shaft (12) to disengage it from the gear (13) and instead engage with the bevel gear (31). When the plate cylinder dedicated drive source 35 is operated in such a state, the power is bevel gears.
Plate cylinders via 37 and 29 and via clutch means 33
The plate cylinder 2 is rotated by being transmitted to 12. However, the relationship between the plate cylinder shaft 12 and the gear 13 is that the power is not transmitted by the action of the bearing 27 between them, so that the gear 11 remains stopped and the impression cylinder 1 does not rotate, so that The printing paper 20 (see FIG. 5) wound on the peripheral surface of the cylinder 1 is not delivered. If the same operation as described above is performed on the other plate cylinder 2a, the same operation as described above occurs. Further, the same result is obtained even if the sliding operation of the clutch means is performed prior to the rotating operation of the eccentric sleeve.

As described above, the plate cylinder drive sources 35 and 36 are attached to the side surfaces of the eccentric sleeves 24 and 26, respectively.
Since it is fixed at 39, 40, eccentric sleeves 23, 24 and 25, 2
Even if the plate cylinder shafts 12 and 18 are displaced by rotating 6 respectively, the meshing relationship between the bevel gears 37 and 31 and 38 and 32 does not change.

As described above, in the illustrated embodiment, with respect to the displacement of the plate cylinder shafts 12 and 18, the eccentricity of the sleeve is linked to maintain the engagement of the bevel gears 37 and 31 or 38 and 32. For example, guide means (not shown) displaceable in the direction of displacement of the plate cylinder shafts 12 and 18 are provided on the outer surfaces of the side frames 21 and 22, and the brackets 39 and 40 are supported by the guide means.
If the brackets 39 and 40 are operated so as to be displaced in accordance with the displacement amounts of 12 and 18, the engagement of the bevel gears 37 and 31 or 38 and 32 can be maintained.

Although not shown, the eccentric sleeves 23, 24 and 25,
Each of the 26 may be modified into an inner / outer double eccentric sleeve so that the separating operation and the printing pressure adjusting operation at the time of plate replacement can be separately performed.

When the clutch means 33 is engaged with the gear 13 after completion of plate exchange, it is necessary to match the phase of the plate cylinder 2 with the phase of the impression cylinder 1, and for that purpose, mechanical and / or electrical phase detection means (Not shown) is installed.

The present invention is not limited to the above embodiments,
It includes all design modifications that do not depart from the scope of the claims.

g) Effects of the Invention As described above in detail, in the present invention, the adjacent impression cylinders 1
In the plate cylinder 2 provided with the power transmission means 10, 11, 13 from the second power transmission means 35 for rotating only the plate cylinder 2,
Since 37 and 31 are separately provided and the clutch means 33 for selectively transmitting the power of the two systems to the plate cylinder 2 is provided, the transmission of the power to the plate cylinder 2 is performed by the switching operation of the clutch. During normal printing, it is transmitted from the adjacent impression cylinder 1 as in the conventional case (see FIG. 1), and when the printing plate is changed, the second power is transmitted only to the plate cylinder 2 and not to the adjacent impression cylinder 1. (See the lower half of FIG. 2). Therefore, when exchanging the printing plate, the harmful useless movement of the adjacent impression cylinder 1 is prevented, so that it is possible to eliminate the waste paper caused by the rotation of the impression cylinder 1.

Further, since the rotation of the impression cylinder 1 is blocked during the plate replacement, the replacement worker can concentrate his / her attention only on the plate cylinder 2, and therefore not only can the work of good quality be performed, It made it possible to eradicate the accident that occurred due to the rotation of the plate cylinder.

Since the present invention respects the conventional mechanism as much as possible and can achieve the above-mentioned effects with only a very small number of additional mechanisms, it is possible to easily and refurbish the installed operating conventional machine at low cost and easily. Therefore, it is conspicuous that it immediately contributes to the elimination of waste of waste paper and the prevention of industrial accidents for printing workers.

[Brief description of the drawings]

FIG. 1 and FIG. 2 each show a rotary printing unit showing a specific embodiment of the present invention, similar to FIG.
FIG. 1 is a cross-sectional plan view, of which FIG. 1 shows a state during normal printing in which power from an impression cylinder is transmitted to the plate cylinder, and in the lower half of FIG. 2, only the plate cylinder is rotated by its own power. FIG. 2 shows a movable plate exchange state, and the upper half of FIG. 2 shows an intermediate state between the two, that is, a state during switching. FIG. 3 is a schematic explanatory view showing an example of the overall configuration of a recent large-sized rotary printing machine for newspaper printing, in which a large number of rotary printing units are arranged, and FIG. 4 is taken along line 4-4 in FIG. FIG. 5 is a vertical sectional side view taken along the line 5-5 in FIG. 4 showing a conventional rotary printing unit in comparison with FIG. 1. 1 and 1a ... impression cylinder, 2 and 2a ... plate cylinder, 3 ... main motor, 4 ... main shaft, 7 ... vertical axis, 5,6,8 and 9 ... bevel gear, 11,13,14 , 16,17 and 19 …… Gear, 10 and 15 …… Impression cylinder shaft, 12 and 18 …… Plate cylinder shaft, 20 …… Winding paper printing paper, 21 and 22 …… Side frame, F …… Folding unit, P …
… Printing units, 23,24 and 25,26 …… Eccentric sleeves, 2
7,28 and 29,30 …… Bearing, 31 and 32 …… Bevel gear, 33 and 3
4 ... Clutch means, 35 and 36 ... Drive source dedicated to plate cylinder, 37
And 38 …… Bevel gears, 39 and 40 …… Brackets.

Claims (1)

(57) [Claims] 1. A plate cylinder provided with power transmission means from an adjacent impression cylinder, wherein a second power transmission means for rotating only the plate cylinder is separately provided, and the power of the two systems is applied to the plate cylinder. A plate exchange assisting device for a rotary printing press, characterized in that a clutch means for selectively switching and transmitting is provided.