JPS587640A - Photoplotting device - Google Patents

Abstract

PURPOSE:To register the position of a film to be exposed accurately by providing plural pieces of pin switches which operate by detecting the contact or proximity with the end face of a sheet film on a table. CONSTITUTION:The operator in a dark room holds an unexposed sheet film 2 with the film surface faced upward and places the film 2 in such a way that the end part of the film 2 presses the pin heads of three pin switches 3-1, 3-2, 3-3 simultaneously. Then, the three switches 3-1, 3-2, 3-3 operate simultaneously to operate an exposure start relay 20 which operates a vacuum pump first, thus sucking and fixing the film 2. In this state, the film 2 is set in a correct position. In accordance with the control of a CPU, a light spot 7 is irradiated by a head 5, and the head 5 and the table 1 are moved respectively in X-, Y-directions, whereby arbitrary patterns are drawn on the film 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photoplotting device that can easily and accurately align a film to be exposed.

Under the control of a processing device (cpv), a photoplot device exposes a photo film set on a movable table or tray to a light beam to become an original plate for producing printed circuit boards. It is used to create patterns, and constitutes an eight-domain artwork system that performs automatic drawing*.

In a photoplot device, an unexposed sheet of film must be set in a fixed position on a table before exposure work, but this work must be done by hand in a dark room. Therefore, in order to make positioning easier, conventionally, several holes are drilled in the dark side of the film in advance, and the holes are inserted into a bin protruding from the table to set the film in place. I was trying to do it. Therefore, before use, the film had to be punched using a special punch machine.

However, such a film punching operation is accompanied by various problems such as first-order problems.

Since the punching process is carried out in a darkroom, the punch machine is equipped with a guide to position the film, but it still not only takes time to confirm the position, but also the film may be wasted due to incorrect positioning. .

2. When punching, the film surface should be on the bottom side.
It is easy to damage the membrane surface.

It takes time and money to adjust the punch section of a five-punch machine and maintain other moving parts.

The present invention aims to eliminate these drawbacks of the prior art, and its purpose is to provide a photo film that eliminates the need for holes in the film for positioning, thus eliminating the need for punching and simplifying the work process. The goal is to provide a plot device.

The photo plotting device of the present invention detects and fixes the completion of 9 positioning by simultaneously operating all of these contacts depending on the film surface to be exposed.
This allows exposure work to begin.

Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 is a perspective view showing the main parts of an embodiment of the photo plotting apparatus of the present invention. In the figure, 1 is a table, 2 is a film, 3-1.3-1, 5-* is a bottle switch, 4 is a suction hole, 5 is a head, 6 is a lens, and 7 is a light spot.

In FIG. 1, the table 1 has a flat top surface,
Film 2 is set thereon with the film side facing up. On the top surface of the table 1 are a plurality of bin switches 3-+ and 3-.
1 and 5-1 are provided in a protruding manner, and when setting the film 2, the end of the film is pressed against the bin switch 5-1.
Align so that it hits s, 5-s, and 5-m at the same time. A large number of suction holes 4 are provided on the surface of the table 1, and when the positioning is completed, a vacuum pump switch (not shown) is turned on, the vacuum pump (not shown) is operated, and the film is vacuumed through the suction holes. It is designed to be sucked in and fixed in place.

The head 5 has an internal light source and an aperture that determines the diameter of the light beam, and produces a light spot 7 of a constant diameter on the film surface of the film 2 through a lens 6. The diameter of the spot can be arbitrarily set by changing the aperture.

The head 5 can be moved in parallel in the X direction shown in FIG. 1, and the table 1 can be moved in parallel in the Y direction. Therefore, while the head 5 and the table 1 on which the film is set are moved under the control of a CPU (not shown), a light spot 7 is irradiated onto the film surface for exposure. You can draw any pattern.

! Figure 2 shows a detailed example of the configuration of the bin switch. In the same figure, the same parts as in the first view are indicated by the same numbers, and 10 is a bottle head, 11 is a movable contact, 12 is a fixed contact, and 15 is a spring.

In FIG. 2, the movable contact 11 is normally pulled by a spring 15 and is out of contact with the fixed contact 12. When the bottle head 10 is pushed by the film 2, the movable contact 11 comes into contact with the fixed contact 12 to close the circuit. The bin switch shown in FIG. 2 can be easily constructed by, for example, a microswitch, but it goes without saying that other contact or proximity detection devices may also be used.

FIG. 3 shows the connection between the bin switch and the exposure start relay in one embodiment of the photo plotting apparatus of the present invention. In the same figure, 5-t, 3-*.

3-3 are the bin switches shown in FIG. 1, and 20
is an exposure start relay, and 21 is a power supply.

In Fig. 3, each bin switch 5-*, 3-snow,
5-s has its contact portions connected in series to form an AND circuit. When the bin switches 5-1, 5-*, and 5-s are simultaneously connected by abutting the film, the exposure start relay 20 is activated via the power source 21.

The photoplot device of the present invention operates as follows. That is, the operator holds an unexposed sheet of film with its surface facing up in a dark room, and causes the end of the film to simultaneously press the bin heads of five bin switches. As a result, the three bin switches are activated simultaneously, the exposure start relay is activated, and the vacuum pump is activated to suction and fix the film. In this state, the film is set in the correct position. Next, a spot is irradiated by the head 5 under the control of the CPU, and an arbitrary pattern is drawn on the film by moving the head 5 and the table 1 in the X and Y directions, respectively.

In the above explanation, the number of Ruhin switches installed on the table is three, but the number of bin switches is not limited to five, and can be set in consideration of the size of the sheet film and the ease of work. It goes without saying that it can be installed arbitrarily as needed.

As explained above, according to the photo plotting device of the present invention, there is no need to perform hole punching on the film for positioning, which not only shortens working time and eliminates wasted film due to work errors, but also reduces the need for punching machines. Time and costs for adjustments, maintenance, etc. can be saved. Further, the occurrence of scratches on the film during punching operations is eliminated. Furthermore, according to the present invention, the film can be fixed and the exposure process can be started at the same time as the alignment is completed.
Not only is the work easier and error-free, but the working time is significantly reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the essential parts of an embodiment of the fuel wood and metal lot machine of the present invention, Fig. 112 is an explanatory diagram showing an example of the detailed configuration of the bin switch, and Fig. 185 is a diagram showing the arrangement of the bin switch and the exposure start relay. FIG. 3 is a diagram showing an example of connections. 1... table, 2... film, 3-s, 5
-s, 5-s...Bin switch, 4...Suction hole, 5...Head, 6...Lens, 7...Light spot, 10...Bin head, 11...Movable contact , 12
...Fixed contact, 15...Spring, 2o...Exposure start relay, 21...Power supply patent applicant Fujitsu Limited

Claims (1)

[Claims] In a photoplot device that uses a light spot to expose a pattern on a film fixed on a table, a plurality of bin switches are provided on the table and operate by detecting contact with or proximity to the edge of the sheet film, and the plurality of bin switches are installed on the table. A photo plotting device characterized in that when the bin switches of the above are operated at the same time, the film is vacuum-suctioned and fixed, and the exposure operation can be started.