JPS6067947A - Method and device for exposure in plate making - Google Patents

Abstract

PURPOSE:To shorten the time of an exposing process by allowing an original film to standby on a plate material mounting board before a plate material is carried onto the plate material mounting board. CONSTITUTION:When a machine plate for offset lithography, relief printing, etc., is made, a carriage 9 mounting plate materials 10 is put in a plate material supply part 2, and while a slip sheet is discharged into a slip sheet receiving box 5, plate materials 10 are moved onto a conveyor belt 25 successively from the top and conveyed toward an exposure part 4. Simultaneously, an original film is taken out of a cassette while held by a chucking device 33 and drawn out onto the plate material mounting board 28. Then, the chucking device 33 is lowered to reset the holding state, and the original film stands on the plate material mounting board 28 until a plate material 10 is carried in. A plate material supply roller 37 carries the plate material 10 in and positions it on the plate material mounting board 28, and the original film is superposed upon the top surface of the plate material 10 to perform exposure in said state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exposure method and an exposure apparatus that are applied to, for example, the process of producing offset printing or letterpress printing.

In order to obtain printing plates such as off-cent printing or letterpress printing by the photomechanical method, the plate material is placed on a plate material mounting plate in the conventional manner, and a manuscript film is placed on top of the photosensitive layer formed on the upper surface of the plate material.
In this state, exposure is performed from above. For example, if a negative type photosensitive material is used for the photosensitive layer, light is applied only to the photosensitive layer that overlaps the image area of the original, and this area is cured. By eluting the non-image areas that were not exposed to light in a post-process, a printing plate having a convex image area and a concave non-image area is obtained.

In conventional exposure, the plate material is once loaded and placed on the plate placement board and positioned, and then the original film held in a storage cassette or the like outside the exposure section is loaded onto the plate material. I bring it to the top of the plate and place it on top of the plate material. For this reason, in addition to the time required to position the plate material, additional time is required to position the original film on the plate material mounting plate for exposure, which lengthens the entire exposure process. There is a problem that efficiency cannot be improved.

The present invention was made with the aim of solving the above-mentioned problems in the conventional exposure process, that is, shortening the time required for the exposure process.To achieve this objective, the exposure method according to the present invention The gist of this is that the entire original film is placed on standby on the plate placement plate in advance before being carried onto the plate placement plate, thereby eliminating the time it takes to position the original film on the plate placement plate. The exposure apparatus according to the present invention is provided with a chucking device for pulling out the original film between the plate material placement board and the light source to above the plate material placement board, and in the vicinity of the plate material placement board. The gist is that an elevating device is provided to hold the original film pulled out by the chucking device above the plate mounting plate.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of the automatic exposure machine, and FIG. 2 is a plan view of the automatic exposure machine.

The automatic exposure machine 1 includes a plate material supply section 2, a plate material transport section 3, and an exposure section 4 incorporating an exposure device that implements the exposure method according to the present invention.
A paper receiving box 5 is attached to the side of the plate supply section 2, and a storage cassette 6 for holding original film is attached to the front of the exposure section 4 (see FIG. 2).

A paulownia wood block supply lifter 8 is provided in the frame I of the plate material supply section 2, and a cart 9 is mounted to the plate material supply section 2 so as to straddle this lifter 8.
It is said that it is possible to enter and exit from the inside. A large number of plate materials 10 are stacked and placed on the cart 9, and a mount for preventing scratches is interposed between the plate materials 10.

Further, a motor 11 is fixedly attached to the plate supply lifter 8, and by driving the motor 11, the plate 13 is moved up and down via a gear box 12. Then,
The plate material 10 placed on the cart 9 as the plate body 13 rises
gradually increases.

In addition, a support plate 14.14 is provided upright at the upper side end (left end in FIG. 1) of the plate material supply section 2, and mount discharge rollers 15, 15 are installed between these support plates 14.14, and further supported. Board 14
In the vicinity of I, the lower ends of a pair of arms 16.16 are pivoted by a cylinder unit (not shown), and a suction device 17 equipped with a vacuum pad is attached to the tip of the arms 16.16.

Then, the arms 16 and 16e are rotated clockwise in FIG. 1 to bring the vacuum pad of the suction device 17 onto the interleaf sheet on the plate material 10, and the vacuum pad adsorbs the backing sheet. In this state, the arm 16.16 is rotated counterclockwise and the mount is placed on the discharge roller 15,1.
5, and the mount is discharged into the mount receiving box 5 by the discharge rollers 15, 15.

On the other hand, on the front and rear upper surfaces of the frame body 7 at the upper part of the plate material supply section 2, a pair of support plates 17 are provided vertically apart from each other, and a guide rod 18 is provided between the left and right support plates 17, 17. A movable member 20 that is moved by a motor 19 is fitted onto the guide rod 18, and a support plate 22 that is moved up and down by a cylinder unit 21 is attached to the movable member 20, and a bracket 23 formed on the support plate 22 is installed. ... A suction device equipped with a vacuum pad 24 is fixed.

After removing the upper interleaving paper using the suction device 11, the plate material 1o is suctioned by the vacuum pad 24, the support plate 22 is raised by the cylinder unit 21, and the motor 19 is driven. As a result, the moving member 20 is moved to the right in FIG.
5, transfer with 10 tons of plate material, then release the suction state and transfer 10 tons of plate material.
Transfer onto the conveyor belt 25. Further, this conveyor belt 25 is driven by a motor 261,
When the plate material 10 comes into contact with the limit switch 27, the motor 26 is stopped.

On the other hand, as shown in FIG. 1, the exposure section 4 has a plate mounting plate 28Th fixedly mounted on the frame 7 of the exposure machine 1, and guide rods 3o mounted on supports 29 erected on the frame T. A case 31 containing a built-in light source is attached to the case 31 so that it can be raised and lowered freely, and a weight 32 is used to raise and lower the case 31 with a small amount of power.

The cassette 6 is located between the plate material mounting board 28 and the case 31.
A chucking device 33 for taking out the original film from the
The chucking device 33 is raised and lowered by cylinder units 34 and 34. In addition, guide plates 35 and 3 are provided at the upstream and downstream parts of the plate material mounting board 28.
A plate supply roller 37 is provided upstream of the guide plate 35 on the upstream side, and a plate discharge roller 38 is provided downstream of the guide plate 36 on the downstream side.

As shown in FIGS. 3 to 5, the chucking device 33 is provided with cylinder units 3 in front and behind the plate mounting board 28.
A guide rod 40.40t is installed between both ends of these support plates 39.39, and a moving plate 41 is installed between the guide rods 40.40. By screwing the movable plate 41 onto a threaded rod 43 rotated by a motor 42, the movable plate 41 is moved in the front-rear direction along the guide rods 40, 40. Furthermore, a chuck portion 44 and a lock piece 44a are attached to the movable plate 41.

The chuck portion 44 is attached to the movable plate 4 as shown in FIG.
A pair of support plates 45, 45 are provided protruding forward from the moving plate 41, and a solenoid 46 is fixed to the back surface of the moving plate 41. The fingers 49, 49 are slidably inserted into the rods 48, 48 provided between the shaft 46a and the support plates 45, 45, and the link pieces 47 are fully connected. When the solenoid 46 is actuated to project the shaft 46a from the state shown in FIG. 6, the fingers 49.4
When the fingers 49, 49 slide apart and expand, and the shaft 47 is retracted, the fingers 49.49 close. Then, the fingers 49 are expanded and positioned above and below the bar-shaped hanger of the document film held in the cassette 6, and the fingers 49 and 49 are closed to grip the document film.

Here, the entire details of the cassette 6 will be explained based on FIG.

The cassette 6 is attached to a base 50 with a vertical guide rod 51.
52, the brackets 54 of the document film holder 53 are fitted into these guide rods 51, 52, and one bracket 54a is screwed onto a threaded rod 56 rotated by the motor 55, thereby removing the holder. 53 is moved up and down along guide rods 51 and 52.

A plurality of locking portions 57 are formed on the holder 53 at regular intervals in the vertical direction, and a bar-shaped hanger 59 with a document film 58 fixed thereon is hung between the locking portions 57. I have to.

On the other hand, a support plate 60 provided near the guide rod 52
A plurality of limit switches 61 are attached to the bracket 54b of the holding body 53 at intervals equal to the intervals of the locking portions 57.
An operating piece 62 is attached to turn on and off... The holding body 53 is raised by driving the motor 55, and when the operation piece 62 comes into contact with the limit switch 61 at the lowest stage, the lifting of the holding body 53 is stopped by the motor 55 being stopped. This state is shown in FIG.

In this state, the chuck section 44 of the chucking device 33 grips the bar-shaped hanger 59 of the uppermost document film 58, takes out the document film 58 from the cassette 6, and pulls it out into the exposure section 4. Thereafter, the motor 55 is further driven to raise the holder 53, and when the operating piece 62 comes into contact with the second limit switch 61 from the bottom, the raising of the holder 53 is stopped, and the second document from the top is moved up. The film is placed at a take-out position by the 58-karat gold chucking device 33.

FIG. 8 is a front view of the original film lifting device disposed near the plate mounting plate 28. The lifting device 63 has a support plate 64 fixed below the frame 7 of the automatic exposure machine. Support plate 6
A movable plate 65 is disposed below 4, and the tip of a rod 67 of a cylinder unit 66 fixed to the movable plate 65 is tied to the support plate 64 so that the movable plate 65 moves up and down with respect to the support plate 64. A shaft member 69 fixed to the movable plate 65 is made to protrude upward through a hole 68t formed in the support plate 64, and this shaft member 69 is held with a bearing 70C, and a vacuum pad is attached to the tip of the shaft member 69. A suction device 72 with 71 is attached.

Next, the overall operation of the automatic exposure machine 1 constructed as described above will be explained below.

First, the cart 9 carrying the plate material 10 is put into the plate material supply section 2, the interleaving paper is discharged into the mount receiving box 5, and the plate material 10 is loaded into the plate material supply section 2.
are sequentially transferred from the top onto the conveyor belt 25 via the vacuum pad 24, etc. The member 1o transferred onto the conveyor belt 25 is conveyed toward the exposure section 4.

On the other hand, in parallel with the above operation, the following operation is performed on the original film 5.
It is done for 8.

Immediately, the motor 42 of the chucking device 33 is driven to move the moving plate 41 to the vicinity of the cassette 6, and the fingers 49 and 49 of the chuck portion 44 of the chucking device 33 grip the hanger 59 of the original film 58. Next, the motor 42 is reversed to move the moving plate 41 in the opposite direction to the cassette 6. Then, the original film 58 is taken out from the cassette 6 while being held by the chuck part 44, and
The plate material placement board 28 is pulled out above.

Next, the chucking device 33 is lowered by the operation of the cylinder units 34 and 34, and the document film 58 is placed on the plate material mounting plate 28. In addition, in this state, the plate material 10 is still
has not been carried onto the plate material mounting board 28, and the vacuum pad 71 of the lifting device 63 is not carried onto the plate material mounting board 28 and the road surface.
It has fallen to the point where it becomes. At this position, the holding state of the document film 58 by the chucking device 33 is completely released, and at the same time, the vacuum pad 71 of the lifting device 63 is released.
The original film 58 is sucked and held from below. Thereafter, the chucking device 33 is moved upward and the shaft member 69 of the elevating device 63 is raised to hold the document film 58 sucked by the vacuum pad 71 above the plate material mounting plate 28, so that the plate material 10 is The material waits for it to be carried onto the material placement board 28.

Next, the plate material 10 is carried onto the vacuum surface plate by the plate material supply roller 37, and after the positioning of the plate material 10 on the plate material mounting plate 28 is completed, the cylinder unit 66 is operated again to transfer the document film 58. Lay it on top of the plate material 10. In this state, exposure is performed, and when the exposure is completed, the original film 58 is lifted up by the elevating device 63, and the original film 58 is removed from the exposure section 4 and returned to the storage cassette 6 by the reverse operation to that described above. Further, the plate material 10 is sent to the next process via discharge rollers 3B and 38.

On the other hand, in the original film 58 storage cassette 6, the second stage original film 58 is raised to a position where it is gripped by the chuck section 44, in preparation for the next exposure.

The above is an example of the implementation of the present invention, and the present invention is not limited to the above. For example, in the embodiment, the chucking device and the lifting device are separate bodies, but the chucking device may also have the function of the lifting device. Specifically, the chucking device is provided with a mechanism for holding the lower end of the original film, and the plate material is carried onto the plate mounting plate while the original film is held above the plate mounting plate by the chucking device. You can do it like this. Also,
The vacuum pads of the lifting device need to be provided at positions where they do not interfere with the conveyance of the plate material, but the number of the vacuum pads is arbitrary.

As explained above, according to the present invention, the original film is made to wait above the plate material mounting plate in advance before being transported and positioned on the plate material mounting plate. The time required to transport the film from the camera to the exposure section can be saved, and especially in the case of duplication, the time required for the exposure process can be significantly shortened compared to the conventional method. Therefore, many effects such as improving the efficiency of the entire plate-making work can be achieved.

[Brief explanation of drawings]

Fig. 1 is a front view of an automatic exposure machine used to carry out the present invention, Fig. 2 is a plan view of the automatic exposure machine, Fig. 3 is a side view of the chucking device, and Fig. 4 is a front view of the chucking device. , 5th
6 is a plan view of the chucking device, FIG. 6 is an enlarged side view of the chuck section, FIG. 7 is a front view of the original film storage cassette, and FIG. 8 is a front view of the original film lifting device. In the drawing, 1 is an automatic exposure machine, 2 is a plate material supply section, 3 is a plate material transport section, 4 is an exposure section, 6 is a storage cassette for document film, 8 is a plate material supply lifter, 9 is a trolley, and 10 is a Plate material, 17
is a suction device for interleaf paper, 24°71 vacuum pad,
Reference numeral 25 designates a conveyor belt, 28 a plate mounting plate, 33 a chucking device, 44 a chuck section, 58 a document film, 61 a limit switch, and 63 a document lifting device. Patent Applicant Photopoly Ohka Co., Ltd. Agent Patent Attorney 1)/Toyo Department Patent Attorney Kuni Ohashi Production Volume Patent Attorney Yu Koyama Figure 3 Figure 4 Figure 6 Procedural Amendment (Voluntary) 1981 October 24E1 1. Indication of the case Japanese Patent Application No. 58-175676 2. Name of the invention Exposure method and exposure device in plate making 3. Person making the amendment Relationship with the case Patent Applicant: Photopoly Ohka Co., Ltd. 5. Amendment order Date of issue 6, Subject of amendment Description and drawings 7, Contents of amendment

Claims (2)

[Claims] (1) In an exposure method applied to a plate-making process in which a plate material and an original film are overlapped on a plate material mounting plate and exposed to light, in advance, before carrying the plate material onto the plate material mounting plate, The original film is kept waiting above the plate mounting plate, and after the plate is carried onto the plate mounting plate, the original film that has been waiting above is lowered and superimposed on the upper surface of the plate,
An exposure method in plate making, characterized in that exposure is then performed. (2) a plate mounting board on which the printing plate and original film are stacked and placed; a light source disposed above the plate mounting board;
A chucking device is provided between the light source and the plate material mounting board to pull out the original film above the plate material mounting board, and a chucking device is provided to place the original film pulled out by the chucking device on the plate material. 1. An exposure device for plate making, comprising an elevating device provided above a plate material mounting plate held above the plate.