JP2000301689A - Printing unit for rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accessibility to the inside of a printing unit and properties for maintenance thereof, without restricting the functionality of a printing press, in regard to the printing press wherein a device for making a plate is incorporated. SOLUTION: An image forming head 7 is fixed to an adjustable support member 8. Means for fixing the support member 8 are provided at least at two different positions in respect to a plate cylinder 4. At a first position, the image forming head 7 is set in a state of being directed to the plate cylinder 4 at an image forming position, while at a second position, it is set in a state of being apart from the plate cylinder 4 and, consequently, the plate cylinder 4 is accessible from outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing unit for a rotary printing press, in which a plate manufacturing apparatus is incorporated.

[0002]

2. Description of the Related Art In known printing presses, a laser-equipped image forming head is incorporated in a printing unit such that the laser radiation produces dots which accept printing ink in the material of the printing form. I have. The target irradiation range of the optical element for focusing this laser irradiation is:
Due to their radioactivity, they are very small, so that the imaging head is located very close to the surface of the plate cylinder on which the plate material is stretched. Beside the imaging head, such as inking and dampening and cleaning devices,
Several devices necessary for the operation of the printing press are incorporated in the printing unit. The empty space for maintenance is either non-existent or very narrow. To guarantee accessibility to a particular component, the other component must be partially removed, in which case,
The protection net disposed in front can be swung aside.

[0003] In order to simplify the plate exchange, systems are known in which a foil is used as the plate and a winding roller and an unwinding roller for this foil are arranged in the plate cylinder. This foil is sufficient for a large number of printing inkings, so that there is little need to use new spare rollers.

[0004]

In the case of other known systems, the used plate is replaced by a new one at each printing inking. These plates can be housed in a cassette which can be swung by a control device to a mounting position of the plate cylinder or which can be transported to this mounting position by linear movement. With this system, it is ensured that the plate mounted on the plate-setting device of the plate cylinder is freely accessible.

In the case of a printing press, maintenance work that can be performed manually is required. In particular, in the case of a printing machine having a row structure, there is only a few places for maintenance workers. This maintenance is problematic if the operator has to take an unnatural posture during the maintenance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing machine in which a plate making apparatus is incorporated so as to improve accessibility and maintainability of the inside of a printing unit without limiting the functionality of the printing machine. To change.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided, in accordance with the present invention, an apparatus for making a printing form, which is fixed to an adjustable support member, wherein the means for fixing the support member is provided on a plate cylinder. Are provided in at least two different positions,
In a first position, the device is placed facing the plate cylinder in an image forming position, and in a second position, the device comprises:
It is located away from the plate cylinder, so that the plate cylinder is achieved by being accessible from the outside.

[0008] Preferred embodiments are set forth in the dependent claims.

According to the invention, it is ensured that the required free space is formed at the first position of the support member in the plate making apparatus for supplying a new plate or new plate material.

The accessibility to the printing unit and the accessibility to the apparatus for forming an image on the plate for performing maintenance work are further improved when the support member is fixed at the third position. In this position, the operator can inspect and adjust the image forming head without any trouble.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings.

The printing unit 1 in the offset sheet-fed printing press shown in FIG. 1 comprises a printing unit 2 arranged in the front in the sheet flow direction and a printing unit 3 arranged in the rear. Is located between. This printing unit 1 contains all the components necessary for printing the printing ink, of which only the plate cylinder 4 and the blanket cylinder 5 are shown in the schematic diagram of FIG. The offset sheet-fed printing press is equipped with a plate mounting device and a plate removing device. Further, the printing unit 1 is provided with a linear guide member 6 for the plate.
The linear guide member 6 guides the plate to be mounted or removed between the plate covering member on the plate cylinder 4 and the plate container outside the printing unit 1. An image is already formed on the plate to be attached in advance. A feature of the printing unit 1 is that the printing material can be supplied to the plate cylinder 4 via the linear guide member 6, stretched on the surface of the plate cylinder 4, and an image can be formed inside the printing unit 1. That is. Further, an image forming head 7 is provided on a multi-link type support member 8. The image forming head 7 includes a laser and an optical system. The laser is activated so that a dot on the plate is received which receives the printing ink corresponding to the printed image. At the time of this image formation, the image forming head 7
Is moved parallel to the rotation axis of the plate cylinder 4 to detect the entire surface of the plate cylinder. The support member 8 includes two support arms 9 and 10. L-shaped support arm 9
Is fixed to the region above the frame of the printing unit 1 in the oscillating bearing 11. In order to position the support member 8, a pneumatic cylinder 13 is provided between the swing bearing 11 and the lever-shaped protrusion 12 of the support arm 9, and another pneumatic cylinder is provided inside the printing unit 1. A lever mechanism 14 having 15 is provided. The lever mechanism 14 is configured as a two-armed lever rotatable within the bearing 16. The arm of the lever mechanism 14 acts between two lock members 17 and 18 fixed to the image forming head 7. Lever mechanism 14
Can be pushed out of the lock members 17, 18 in the direction of the arrow 19 by a device (not shown). The image forming head 7 can be fixed at three different positions. In one image forming position, the image forming head 7 is in contact with the stoppers 20, 21, 22. The fixing at the image forming position is performed by a device that applies a force on the image forming head 7 in the direction of the arrow 23. In this image forming position, the image forming head 7 is near the surface of the plate cylinder 4. When the lever mechanism 14 enters the locking members 17, 18 and when the pneumatic cylinder 13 is actuated in the direction of arrow 24, the imaging head 7 is displaced from the surface of the plate cylinder 4 by a certain amount, and That is, the plate is sent past the image forming head 7 along the linear guide member 6,
Alternatively, it is fixed at a position indicated by a broken line that can be sent. When the lever mechanism 14 is removed from the lock members 17 and 18, the image forming head 7 can be moved to the maintenance position W indicated by the broken line by the action of the pneumatic cylinder 13. At the maintenance position W, the image forming head 7 is above the printing press 1. The operator can easily inspect, maintain, and maintain the image forming head 7 between the printing units 1 and 3 while standing on the platform 25.
Adjustments can be made. Similarly, the area inside the printing unit 1 around the plate cylinder 4 is freely accessible for maintenance and cleaning operations. 3
Adjustment of the image forming head 7 at one position is performed by program control. The power and data lines 26 required for the function of the imaging head 7 are flexible and can move with the support member 8.

FIG. 2 shows an embodiment of a web material printing machine. The printing unit 27 shown comprises, in particular, two plate cylinders 28, 29 and rubber blanket cylinders 30, 31, respectively, for printing on web material 32, in particular. Plate cylinder
The image forming heads 33, 34 provided on the multi-link type supporting members 35, 36 are attached to the 28, 29, respectively. The support arm 37 of the support member 35 is swingably fixed to a bearing 38 above the printing unit 27. The support member 35 having the image forming head 33 can be moved and fixed from the illustrated image forming position to a maintenance position indicated by a broken line. In this maintenance position, the image forming head 33 is placed outside the printing unit 27 in a region above the printing unit 27. A support arm 39 of the support member 36 is swingably fixed to the bearing. The bearing 40 is mounted on the frame of the printing unit 27 below the platform 41 on which it can be walked. The support member 36 having the image forming head 34 is moved and fixed from the illustrated image forming position to a maintenance position indicated by a broken line below the platform 41. In this maintenance position, it is possible to freely access the image forming heads 33 and 34 and the members inside the printing unit 27, respectively. In the embodiment shown in FIGS. 2 and 3, the imaging heads 33, 34, 50, 51 are used to supply plates to the plate cylinders 28, 29, 45, 46 as already described in FIG. Can be further transported to the mounting location.

FIG. 3 shows an embodiment of a web material printing machine in a partial structure of a belt between wheels. 3 printing units 4 assembled one on top of the other
Within 2,43,44, two pairs of plate cylinders 45,46 and rubber blanket cylinders 47,48 for printing on web material 49, respectively.
It is shown. Based on the example of the printing unit 43, possible arrangements of the plate manufacturing apparatus will be described. Each plate cylinder 45, 46
The image forming head 5 is attached to the multiple link type support members 52 and 53.
0,51 are arranged. The support arms 54 of the support members 52, 53,
55 are fixed to rocking bearings 56 and 57 on the sides of the outer region of the printing unit 43, respectively. The image forming heads 50 and 51 indicated by solid lines and their support members 52 and 53 indicate image forming positions, respectively. For the image forming head 50 and the support member 52, the intermediate position 58 and the maintenance position 59
Are indicated by broken lines. In the intermediate position 58, the image forming head 50 is located inside the adjacent printing unit 44. In the maintenance position 59 obtained through the intermediate position 58, the image forming head 50 is located outside the printing unit 43 on the side near the outer wall of the printing unit 43.

[Brief description of the drawings]

FIG. 1 is a schematic view of a sheet-fed printing press having a printing unit.

FIG. 2 is a schematic view of a printing unit of the web printing press.

FIG. 3 is a diagram illustrating a modified example of the web-fed printing press.

[Explanation of symbols]

 1,2,3,27,42,43,44 Printing unit 4 Plate cylinder 5 Rubber blanket cylinder 6 Linear guide member 7,33,34,50,51 Image forming head 8,35,36,52,53 Support member 9,10 Support arm 11 Swing bearing 12 Projection 13,15 Pneumatic cylinder 14 Lever mechanism 16 Bearing 17,18 Lock member 19,23,24 Arrow 20,21,22 Stopper 25 Platform 26 Data line 28,29,45, 46 Plate cylinder 30,31 Rubber blanket cylinder 32 Web material 38,40 Bearing 37,39,54,55 Support arm 41 Platform 45,46 Plate cylinder 47,48 Rubber blanket cylinder 49 Web material 56,57 Swing bearing 58 Intermediate position 59 Maintenance position W Maintenance position

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 390009232 Kurfuersten-Anglage 52-60, Heidelberg, Federal Republic of Germany

Claims (6)

[Claims] 1. A printing unit for a rotary printing press, comprising a plate cylinder disposed therein and a device for producing a plate, wherein the device for producing a plate (7, 33, 34, 50, 51) is Fixed to an adjustable support member (8, 35, 36, 52, 53), the means for fixing the support member (8, 35, 36, 52, 53) comprises a plate cylinder (4, 30,31,45,46) in at least two different positions (58,59), in a first position the device (7,33,34,50,51) In a position facing the plate cylinder (4, 30, 31, 45, 46) and in a second position (58, 59) the device (7, 33, 34, 5).
0,51) is placed away from the plate cylinder (4,30,31,45,46), so that the plate cylinder (4,30,31,45,46) is accessible from outside A printing unit for a rotary paper printing press, characterized in that: 2. The plate member (8, 35, 36, 52, 53) includes a tool used in the apparatus for manufacturing a plate and the plate cylinder (4, 30, 31, 4).
5. The printing unit according to claim 1, wherein the first and second printing units can be fixed to a third position accessible from outside. 3. The multi-link type swing arm (9, 10, 37, 39, 54, 55), wherein said support member (8, 35, 36, 52, 53) is fixed. The printing unit as described. 4. The swing arm (9, 10, 37, 39, 54, 55)
5. The printing unit according to claim 4, which can be moved by hand. 5. The swing arm (9, 10, 37, 39, 54, 55),
The printing unit according to claim 4, wherein the printing unit is connected to a positioning mechanism (13, 14, 15). 6. The printing unit according to claim 1, wherein a second position of the support member (8, 35, 36, 52, 53) is accessible to an apparatus (6) for supplying a plate material. .