JPS638907Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is based on the invention, in which a negative film is polymerized on the upper surface of a photosensitive plate, and an image on the negative film is exposed to light by a light source provided above the negative film. Regarding the exposure machine for printing on
The purpose of this is to meet the following two requirements, both of which have not been met with conventional exposure machines of this type: (a) to move the photosensitive plate material fed by a conveyor such as a belt to the exposure position; To improve the efficiency of the work of feeding the negative film, setting the negative film at the required position, and reliably removing air pockets between the photosensitive plate material and the negative film that cause blurring. (b) Set the exposure position relative to the photosensitive plate transport path.
The object of the present invention is to provide an exposure machine that satisfies both of the following: overlap in plan view and minimize the space required for installing the exposure machine.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In FIGS. 1 and 2, A indicates an exposure machine according to the present invention, and this exposure machine A operates between the terminal end of the photosensitive plate feeding belt 33 and the starting end of the feeding belt 34. Belts 33, 34
It is provided so as to overlap the transport path in plan view. Reference numeral 1 indicates a casing of the exposure machine A, in which a surface plate 2 for receiving and supporting a photosensitive plate material is fixed at a position approximately at the same height as both belts 33 and 34, and a surface plate 2 is fixed at an upper position. reflective mirror 3
An exposure light source 4 is provided.

Hereinafter, the specific internal structure of the exposure machine A will be explained based on FIGS. 3 and 4. 5 and 6 are pinch rollers that are rotatably supported by the free ends of swing arms 7 and 8 provided at the inlet and outlet of the casing 1, and the inlet side pinch roller 5 is connected to the feed belt 33 from the fixed The photosensitive plate material 24 is fed to the plate material receiving surface 2a of the surface plate 2, and the exit side pinch roller 6 is used to feed the photosensitive plate material 24 on the plate material receiving surface 2a after exposure to the feed belt. 3
4. Numerous grooves 2b are formed on the upper surface of the fixed surface plate 2, and are connected to a vacuum pump (not shown) through small through holes 2c. is in close contact with the plate material receiving surface 2a. The groove 2b...
is formed long along the direction in which the plate material 24 is fed so as not to obstruct the feeding and feeding of the plate material 24. A negative film cassette 25 is provided on the plate receiving surface 2a, that is, above the plate 24 in the exposure position.
The opposing groove 9a of the frame 9 that moves vertically relative to the
9a so that it can be freely inserted and removed from the horizontal direction. This holding frame 9 is connected to piston rods 10, 10 of cylinders provided on both left and right sides of the surface plate 2. Reference numerals 11 and 11 refer to the holding frame 9 and piston rods 10 and 10 for urging the holding frame 9 downward.
This is a compression spring interposed between the 12,
12 is a negative film 27 pasted on the lower surface of the luminor sheet 26 by rolling on the luminor sheet 26 stretched over the cassette 25.
(see FIG. 5) and the plate material 24, and two squeegee rolls are arranged in parallel in the running direction. The squeegee rolls 12, 12 have rigid shafts 12a, 12a and elastic tubes 12b, 12b made of neoprene rubber or the like are fitted around the outer peripheral surfaces of the shafts 12a, 12a.
They are fitted into downward open grooves 13a, 13a, . . . of comb-shaped synthetic resin running members 13, 13 so as to be relatively vertically movable and relatively rotatable. 14 is a forward/reverse switching type motor connected to the holding frame 9;
Sprockets 16, 16 fixed near both ends of a long rotating shaft 15 of this motor 14, and sprockets 17, 16 fixed to passive shafts 17, 17 provided parallel to the rotating shaft 15 in a cantilevered manner with respect to the casing 1. Chains 19 and 19 extend through 18 and 18, respectively.
is suspended, and the comb-shaped running members 13, 13 are connected to the chains 19, 19. Reference numerals 20 and 20 denote frames having a U-shaped cross section that are connected to the left and right sides of the holding frame 9, and bolts 21 and 21 are inserted into the upper sides of the frames 20 and 20 so as to be able to slide vertically.
... suspend and support the guide rails 22, 22, and compression springs 23, 23, ... fitted around the bolts 21, 21, ... urge the guide rails 22, 22 downward. The guide rails 22, 22 press down both ends of the shafts 12a, 12a of the squeegee rolls 12, 12 when they run, and also push the elastic tubes 12b, 1
2b to press the negative film 27 against the plate material 24.

The negative film cassette 25 has a rectangular frame as shown in FIG. A negative film 27 is pasted on the bottom surface of the . The upper side of the squeegee rolls 12, 12 in the running direction of the luminaire sheet 26 is engaged with pins 28, 28 protruding from the lower surface of the cassette 25, and the lower side is held by tension springs 29, 29. It is locked to pins 30, 30 on the top surface side. Therefore, the luminor sheet 26 is pulled and maintained in a flat state by the urging force of the springs 29, 29, and the negative film 27 attached to the lower surface thereof is maintained in a flat state. The upper end of the lumirror sheet 26 comes into contact with the surface plate 2, and as it goes toward the lower end,
It is in an inclined position upwardly away from the plate material receiving surface 2a of the surface plate 2. Therefore, squeegee roll 1
When the rollers 2 and 12 roll and push out the air between the plate material 24 and the negative film 27, a space for air escape is always ensured, making it possible to ensure air evacuation. There is. In addition, in Figure 5, 3
Reference numerals 1 and 31 indicate leaf springs provided on the outside of the lower side frame portion of the cassette 25, and the contact action of the leaf springs 31 and 31 against the holding frame 9 urges the cassette 25 toward the upper side to regulate its position. . Further, in FIG. 4, reference numeral 32 denotes a tension spring stretched between the pushing operation frame portion of the cassette 25 and the holding frame 9, which urges the cassette 25 in the pushing direction with respect to the holding frame 9 to regulate its position. There is. 3' is an auxiliary mirror.

Next, the operation of the exposure machine A having the above configuration is
This will be explained based on the diagram.

As the piston rods 10, 10 rise, the holding frame 9, which holds the cassette 25 and the squeegee rolls 12, 12 together, assumes a non-operating position in which it floats relative to the fixed surface plate 2, and is fed by the action of the inlet side pinch roller 5. Photosensitive plate material 2 on belt 33
4 is supplied to the receiving surface 2a of the surface plate 2 (see FIG. 6A).

Next, as the rods 10, 10 descend, the holding frame 9 moves downward, and the luminror sheet 26 of the cassette 25 is moved downward.
After the upper end of the sheet comes into contact with the surface plate 2 and assumes the exposure position, the motor 14 starts driving and the squeegee rolls 12, 12 move toward the luminor sheet 2.
Run on 6. At this time, the guide rail 22,
22 urges the rolls 12, 12 downward,
The rolls 12, 12 bring the luminor sheet 26 and the negative film 27 on its lower surface into close contact with the plate material 24,
As a result, the air between the two is successively pushed out to the outside (see Figure 6B).

The rolls 12, 12 reach the lower end of their travel, and the luminor sheet 26 and the negative film 27
When the plate material 24 is completely brought into close contact with the plate material 24, a switch for the light source 4 is activated and exposure is performed. When the exposure is finished, the holding frame 9 rises again, and
In parallel with this rise, squeegee roll 12, 12
moves back (see Figure 6, c).

After the holding frame 9 finishes rising, the exposed plate material 24 is sent out to the delivery belt 34 by the action of the exit side pinch roller 6 (not shown).

Although the embodiments have been described above, the gist of the exposure machine according to the present invention is that the fixed surface plate 2 receives and supports the photosensitive plate material 24 fed from the side.
A frame 9 for holding the negative film 27 and the luminar sheet 26 in a superposed state is disposed above the plate material receiving surface 2a.
The exposure machine is equipped with an exposure light source 4 having a reflecting mirror 3 above the negative film 27 and a mirror sheet 26.
The holding frame 9 is configured to be able to be switched between an exposure working position and a non-working position with respect to the fixed surface plate 2 by vertical movement, and this vertically movable holding frame 9 is capable of holding the plate material 2.
4. It is characterized in that it is equipped with a squeegee roll 12 that performs an air extrusion action by rolling the upper surface of the negative film 27 and the luminor sheet 26 in a superposed state, and has the following features. It has achieved great effects.

(a) Since the holding frame 9 for the negative film 27 and the luminar sheet 26 is configured to move up and down with respect to the fixed surface plate 2, it is possible to wind up the negative film on a roller as in the conventional case, or to use multiple roller groups. There is no need to wind the negative film in a roundabout manner and unwind it into a flat state at the time of exposure, which is cumbersome and has a high possibility of bending the negative film.
Since the negative film 27 can be held in the flat state necessary for its exposure operation from the beginning, it is easy to attach the negative film 27 to the exposure machine.
The removal operation and other handling operations can be performed very easily, and since the negative film 27 has no bends, it tends to have very good adhesion to the photosensitive plate material 24, and the squeegee roll 12
The air extrusion effect can be almost perfected. However, since the exposure device can be arranged so as to overlap the transport path of the plate material in plan view, the space required for arranging the exposure device can be made as small as possible.

This is because conventional exposure machines that can be placed overlapping the plate material conveyance path in plan view have the above-mentioned drawbacks because they wind up or wrap the negative film. In the case of an exposure machine that keeps the plate in a flat state from the beginning, it should be placed so that it protrudes to the side of the plate conveyance path, and the surface plate should be placed facing the conveyance path and pushed inside the exposure machine on the side. However, the present invention has been able to achieve both of these conflicting requirements. be.

(b) Raise the negative film 27 and the luminar sheet 26 to form a sufficiently large space between them and the fixed surface plate 2, and feed the plate material 24 to the surface plate 2, and also remove the plate after exposure. Since the material 24 can be fed out from the surface plate 2, the feeding and feeding of the plate material 24 can be carried out very smoothly and favorably. Moreover, since the squeegee roll 12 is attached to the holding frame 9 for the negative film 27 and the luminror sheet 26, the negative film 27 is moved onto the printing plate by the downward movement of the holding frame 9.
4, the squeegee roll 12 is immediately rolled and moved in this way to exhaust the air between the negative film 27 and the plate material 24, and then exposed immediately. 9
It is relatively easy to carry out a series of efficient and rational processes such as moving the squeegee roll 12 upward while returning it to its original position, and the entire process can be carried out extremely efficiently.

As described above, according to the present invention, it has been possible to provide an extremely effective and convenient exposure machine in practical use, which has the combined effects of reducing the required space, simplifying the handling of negative film, and improving work efficiency.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the exposure machine according to the present invention, and FIG. 1 is a schematic plan view, FIG. 2 is a schematic partially cutaway side view, FIG. 3 is an enlarged longitudinal sectional side view of the main part, and FIG. FIG. 5 is a plan view of the negative film cassette, and FIGS. 6A, 6B, and 6C are explanatory views of the operation. 2... Fixed surface plate, 2a... Plate material receiving surface, 3...
Reflection mirror, 4... Exposure light source, 9... Holding frame,
12... Squeegee roll, 22... Guide rail, 24... Photosensitive plate material, 26... Lumirror sheet, 27... Negative film.

Claims (1)

[Claims for Utility Model Registration] A negative film 27 and a luminaire sheet 2 are placed above the plate material receiving surface 2a of the fixed surface plate 2 that receives and supports the photosensitive plate material 24 fed in from the side.
The exposure machine is provided with a frame 9 for holding the negative film 27 and the mirror sheet 26 in a superimposed state, and an exposure light source 4 having a reflecting mirror 3 arranged above the frame 9.
can be switched between an exposure working position and a non-working position with respect to the fixed surface plate 2 by vertical movement, and the plate material 24,
An exposure machine characterized by being equipped with a squeegee roll 12 which performs an air extrusion action by rolling the upper surface of the negative film 27 and the luminor sheet 26 when they are in a superposed state. The exposure machine according to claim 1, wherein a plurality of the squeegee rolls 12 are arranged in parallel in the rolling direction. The exposure machine according to claim 1 or 2, wherein the squeegee roll 12 is provided to roll and run downward along a guide rail 22 that is biased to move elastically.