JPH055551Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed to introduce a photolithographic original film into an automatic exposure machine, and to hold the original film by a chucking device when taking out the original film from the automatic exposure machine. This invention relates to a film holder.

(Prior Art) In order to obtain printing plates such as offset printing or letterpress printing by photolithography, a plate material is generally placed manually on a vacuum surface plate, and a photosensitive layer formed on the top surface of the plate material is placed on a vacuum surface plate by hand. The original film was placed on top of the original film and exposed.

In this way, in the past, exposure was carried out by overlaying the original film on the printing plate exclusively by hand, which made the exposure process time-consuming and labor-intensive, and it was difficult to overlay the original film in an accurate position. It was difficult.

For this reason, the present applicant has proposed automatic selection of the original film, introduction of the original film into the exposure section, and removal of the original film from the exposure section in Japanese Patent Application No. 58-175675 (Japanese Unexamined Patent Publication No. 60-67933). We proposed a device that can do this.

In such an apparatus, an original film storage cassette is attached to an automatic exposure machine, both ends of an original film holder are hooked to the storage cassette, and after a predetermined original film is moved to an original take-out position, it is inserted into an exposure unit. The holder is gripped by a disposed chucking device, the original film is drawn into an exposure section and exposed, and then the chucking device is moved to return the original film back into the cassette.

(Problems to be Solved by the Invention) In the apparatus described above, in order to fix one end of the original film to the holder, one end of the original film is fixed to the holder using a general fastening means, that is, a screw or the like. is attached to the fastening part of the holder.
However, when using such a fastening means, there is a problem that it takes time to attach and remove the document, and it takes time to store the document in the cassette.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a fixing section of the holder so that one end of the document film can be held between the attaching section of the holder and the suction plate. A positioning pin is provided on the clamping surface and a hole is provided in the suction plate so that the positioning pin passes through the positioning hole of the original film and the hole of the suction plate. One was a magnet, and the other was a magnetic material that was attracted to the magnet.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is an overall perspective view of an automatic exposure machine to which a holder according to the present invention is applied. The automatic exposure machine 1 has a box shape, and has a built-in light source for exposure in the upper part and a transport device on one side. An opening 2 is formed to receive the transported plate material.

A cassette 3 for storing original film is attached to the front of the automatic exposure machine 1. Storage cassette 3
The frame body 4 can be raised and lowered by a lifting device (not shown), and a plurality of hanging members 5 are attached to the inner surfaces of the left and right side plates of the frame body 4 at equal intervals in the vertical direction, and these hanging members 5 are attached at equal intervals in the vertical direction. Both ends of a holder 7, which holds the upper end of the original film 6, are hooked to the members 5. A plurality of original films 6 are stored in the storage cassette 3 in a stepped manner, and by moving the frame 4 up and down, a desired original film 6 is positioned at the position where it is drawn into the exposure machine 1. It happens.

FIG. 2 is a front view of the holding body 7 according to the present invention, and FIG.
The figure is a partially cross-sectional side view of the holding body 7, and the holding body 7 consists of a rod-shaped portion 8 and a fastening portion 9 provided integrally with this rod-shaped portion 8, and both ends of the rod-shaped portion 8 are The rod-shaped portion 8 has a small-diameter grip portion 8 which is gripped by a chucking device disposed in the exposure machine 1 at the middle portion of the rod-shaped portion 8.
b, 8b are formed.

On the other hand, the fastening part 9 has a plate shape, and a magnet plate 10 is integrally attached to one surface of the fastening part 9, and a positioning pin 11 extends forward through the magnet plate 10.
stands out.

Thus, the original film 6 is placed on the holder 7 as described above.
To fix the upper end of the original film 6, align the original film 6 with the fixing part 9 so that the positioning pin 11 fits into the positioning hole 6a formed at the upper end of the original film 6, and then insert a suction plate from the outside. Overlap 12. This suction plate 12 is made of a magnetic material such as iron, and has a hole 12a formed in a part thereof through which the positioning pin 11 passes. When the suction plate 12 is further stacked from the outside of the original film 6 in this way, the suction plate 12 is attracted to the magnetic plate 10 provided on the attachment part 9, and the upper end of the original film 6 is attached to the attachment part 9. Magnet body 1
0 and the adsorbent 12.

Then, with the upper end of the original film 6 held by the holder 7, the gripping part 8b of the holder 7 is gripped by the chucking device, the original film 6 is pulled into the exposure section, and placed on the vacuum surface plate. The original film 6 is superimposed on the top surface of the printed plate material, and exposed from above. Light is selectively applied to the photosensitive layer on the top surface of the plate material corresponding to the image area of the original film 6, and the negative photosensitive layer is exposed. In some cases, the areas exposed to light are hardened. The portions not exposed to light are then eluted in a post-process to obtain a printing plate having concave and convex portions corresponding to the image areas of the original film 6.

FIG. 4 is a partially sectional side view similar to FIG. 3 showing another embodiment, in which the fastening portion 9 is made of a magnetic material such as iron, and the adsorption plate 12 itself is is used as a magnetic plate. With this configuration, the document film 6 is held between the fixing portion 9 and the suction plate 12 as described above.

(Effects of the invention) As described above, according to the invention, the positioning pin on the clamping surface of the fastening portion passes through the positioning hole of the original film and the hole of the suction plate, so that the upper end of the original film is is held between the attachment part of the holding body and the attraction plate, one of the clamping surface of the attachment part and the attraction plate is made of a magnet, and the other is made of a magnetic material that is attracted by the magnet. This allows you to hold the top edge of the original film with a single touch, greatly reducing the time it takes to set the original film in the storage cassette, and also ensuring that the original film is held in an accurate position so that it will not shift when being held. It exhibits many effects such as being able to fix the original film to the paper.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of an automatic exposure machine to which a holder according to the present invention is applied, and Fig. 2 is a front view of the holder.
FIG. 3 is a partially sectional side view of the holder, and FIG. 4 is a partially sectional side view of the holder according to another embodiment. In the drawing, 1 is an automatic exposure machine, 3 is a storage cassette for original film, 6 is original film, 6a is a hole for positioning, 7 is a holder for original film, 8 is a rod-shaped part, 9 is a fastening part, 10 1 is a magnet plate, 11 is a positioning pin, 12 is an adsorption plate, and 12a is a hole in the adsorption plate.

Claims (1)

[Claims for Utility Model Registration] A substantially belt-shaped fastening part 9 is suspended from the horizontally extending rod-shaped part 8, and the upper end of the original film 6 is brought into contact with this fastening part 9, and the original film 6 is held in the fastened state. In the document film holder 7 configured to be held down by a suction plate 12 that magnetically attracts the portion 9, the rod-shaped portion 8 has hook portions 8a, 8a at both ends thereof.
The original film 6 can be loaded into the automatic exposure machine 1 by hooking the above-mentioned hooks 8a, 8a onto either of the hanging members 5 provided on the side of the automatic exposure machine 1 at equal intervals vertically. Further, the rod-shaped portion 8 has a plurality of small-diameter gripping portions 8b, 8b in the middle thereof, and these gripping portions 8
b, 8b is formed by removing the fixing part 9, and is placed in the exposure machine 1 to pull out the original film 6 for photolithography into the exposure machine 1 and expose it. A document film holder characterized in that a part of the chucking device is inserted between the chucking devices when the chucking device takes out the document film 6 from the machine 1 and grips the gripping portions 8b, 8b. .