JPH09244150A - Holding structure for original film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize registering performance. SOLUTION: Oiginal film 60 is closely stuck on photosensitive material 24 on a surface plate 18, so that exposure is performed. The end part of the original film 60 is placed on a pin bar 96, and the positioning pin 98 of the pin bar 96 is inserted into the inside of the positioning hole 100 of the end part of the original film 60, so that the original film 60 is positioned. A pressing plate 102 is magnetically attached at the pin bar 96 using a magnet 106, and holds the end part of the original film 60 by making an original cover 318 abut on the original film 60. The original cover 318 (for instance, plural loops) is independently and elastically deformed, and follows and allows the fine movement of the original film 60, so that the occurrences of wrinkles and out of register are prevented. Even in the case that the sticking position of the pin bar 96 is different along the width direction of the pressing plate 102, the pressing plate 102 moves along the width direction, so that a position where the original film 60 is pressed through the original cover 318 is properly obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, in a plate inspection making apparatus, in which an original film is brought into close contact with a photosensitive material placed on a surface plate to expose the photosensitive material through an image on the original film. The present invention relates to a document film holding structure for holding an end portion of the document film, and a contact exposure apparatus including the document film holding structure.

[0002]

2. Description of the Related Art In a color proof making apparatus (plate inspection making apparatus), a photosensitive material 400 is placed on a surface plate 402 and an original film 404 is exposed as shown in FIG. The photosensitive material 400 is exposed through the image of the original film 404 while being in close contact with the material 400.

For the edge of the original film 404,
A positioning plate 406 that is elongated along its end and is positioned with respect to the surface plate 402 is provided. A long pin bar 408 is releasably attached to the upper surface of the positioning plate 406 along the longitudinal direction thereof, the end of the original film 404 is placed on the upper surface of the pin bar 408, and is projected on the upper surface of the pin bar 408. The positioning pin (register pin) 410 is inserted into the positioning hole 412 formed at the end of the original film 404, and the original film 404 is positioned with respect to the pin bar 410.

At this time, the positioning pin 410 is stopped in the positioning hole 412 at the end of the original film 404, and the flexible magnet plate 414 is positioned by the positioning plate 406 so that the original film 404 does not fall off.
From the original document film 404, the original film 404 is mounted across the end portion.
The magnet plate 414 is the positioning plate 406.
It is magnetically attached to the pin bar 408 via the original film 404, and the end portion of the original film 404 is pressed onto the pin bar 408.

By the way, when the magnet plate 414 is attached, it is easily expected that wrinkles will occur on the original film 404 and a positional shift (registration shift) will occur. Further, when squeezing or vacuum adhesion is performed to obtain adhesion, wrinkles occur and misregistration occurs due to the squeeze or vacuum adhesion.

In view of the above circumstances, it is an object of the present invention to provide an original film holding structure for stabilizing the register and a contact exposure apparatus having the original film holding structure.

[0007]

According to the document film holding structure of the present invention as set forth in claim 1, the document film is brought into close contact with a photosensitive material placed on a surface plate and the image of the document film is passed through the photosensitive material. An original film having a positioning hole formed in an end thereof, and a positioning plate elongated along the end of the original film and positioned with respect to a surface plate The positioning plate is elongated along the longitudinal direction and has a positioning pin corresponding to the positioning hole on the upper surface and is releasably attached on the positioning plate, and the end portion of the original film is mounted on the upper surface. And a pin bar that positions the original film by inserting the positioning pin into the positioning hole,
A pressing plate which is elongated along the longitudinal direction of the positioning plate and is provided on the positioning plate and presses the end portion of the original film on the pin bar, and an elongated document along the longitudinal direction of the pressing plate. An original pressing member fixed to the lower surface of the pressing plate so as to come into contact with the edge of the film and independently formed of a plurality of elastically deformable elastic members, and the pressing plate is rotatably supported by the positioning plate, It is a normal position to obtain a position where the pressing plate contacts the original film and presses the original film, and a position where the pressing plate rotates upward to allow insertion and extraction with the positioning hole of the positioning pin. A moving means and a moving means for supporting the holding plate on the positioning plate so as to be movable in the width direction which is the direction perpendicular to the longitudinal direction. That.

According to a second aspect of the present invention, there is provided the original film holding structure according to the first aspect, further comprising a magnet provided between the pressing plate and the pin bar to magnetically attach the pressing plate to the pin bar. It is characterized by

A document film holding structure according to a third aspect of the present invention is characterized in that, in the structure of the first or second aspect, the elastic portion is formed of a plurality of loops.

According to a fourth aspect of the present invention, there is provided a contact exposure apparatus including the original film holding structure according to any one of the first to third aspects.

As the contact exposure apparatus of the fourth aspect, a vacuum contact exposure apparatus capable of performing vacuum contact exposure by covering the photosensitive material and the original film with a flexible transparent sheet-shaped member and contacting them in vacuum is possible.

According to the above construction, the photosensitive material is placed on the surface plate, the original film is brought into close contact with the photosensitive material, and the photosensitive material is exposed through the image of the original film.

Here, the positioning plate is positioned with respect to the surface plate, the end portion of the original film is placed on the pin bar, and the positioning pin of the pin bar is inserted into the positioning hole of the end portion of the original film. , The original film is positioned with respect to the pin bar.

On the other hand, the pressing plate brings the document holder into contact with the document film and holds the edge of the document film.
As a result, the positioning pin is prevented from coming out of the positioning hole, and the end portion of the original film is prevented from falling off.

The document retainer may be a plurality of elastic portions, for example, those formed by a plurality of loops as claimed in claim 3, and the elastic portions are elastically deformable independently of each other. The movement is allowed by following the subtle movements of the film, wrinkles and misregistration are prevented, and the registration is stabilized.

The pressing plate is, for example, by its own weight or, as described in claim 2, magnetically attached to the pin bar by using a magnet so as to normally take a position for pressing the end portion of the original film. When the pressing plate is rotated upward, the positioning pin can be inserted into and removed from the positioning hole.

The pin bar needs to be replaced in order to correspond to the size of the original film, and the pin bar is peeled and attached to the positioning plate. Each time you paste it,
Even when the sticking position of the pin bar is different along the width direction of the pressing plate, the pressed plate moves along this width direction, and the position for pressing the original film via the original pressing can be properly obtained. .

Since the pin bar is elongated along the end portion of the original film, it is expected that undulation due to the lengthwise dimension or undulation due to long-term use will occur. . According to the second aspect of the invention, according to the structure in which the pressing plate is magnetically attached to the pin bar by using the magnet, the pressing plate and the pin bar can be made to conform to each other by the magnetic attraction force, and the original pressing is evenly arranged on the original film. Abut.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which a sheet-like member supporting structure according to the present invention is applied to a color proof making apparatus (plate inspection making apparatus) will be described below with reference to FIGS. 1 to 9.

The plate inspection preparing apparatus is composed of C plate, M plate, Y plate and B plate.
Using each original film color-separated into K (Sumi) plate,
It is an apparatus for inspecting whether there is an error in the layout of the original film, whether there is a color difference, whether there is an error in characters, etc., before creating the actual printing plate. When the photosensitive material is a positive type photosensitive material, the C plate and the BK plate are overlaid on the photosensitive material and contact exposure is performed, and then the M plate and the BK plate are overlaid on the photosensitive material and contact exposure is performed. After that, the Y plate and the BK plate are overlaid on the photosensitive material and contact exposure is performed.
When the photosensitive material is a negative type photosensitive material, C
The plate, the M plate, the Y plate, and the BK plate are overlaid on the photosensitive material and contact exposure is performed.

As shown in FIG. 1, the plate inspection device 10 is
A magazine 12 is provided on the left side in the casing 14, and a surface plate 18 is provided at the center. The magazine 12 contains the photosensitive material in a roll form. When the photosensitive material (the conveying path 16 of the photosensitive material is indicated by a chain line) is pulled out from the magazine 12 and the leading end of the photosensitive material reaches the front of the surface plate 18, the leading end is sucked by the suction cup unit 20. By moving the suction cup unit 20 from the front side of the surface plate 18 to the end portion on the opposite side of the surface plate 18 along the upper surface of the surface plate 18, the photosensitive material is conveyed horizontally in the direction of the arrow A so that Placed on.

The photosensitive material drawn from the magazine 12 is cut into a predetermined length by a cutter 22 and supplied to a surface plate 18. In FIG. 1, a photosensitive material 24 cut into a predetermined length is shown mounted on a surface plate 18.

Two magazines 12 are shown in FIG. For example, it is possible to selectively supply photosensitive materials having different sizes.

As shown in FIG. 4, the surface plate 18 is made up of three layers of a lower base plate 26, an upper surface plate main body 28, and a pattern forming plate 30 between them, and is generally a rectangular plate. It is said to be a state. The pattern forming plate 30 has a rectangular outer frame 32.
And is made of sponge. Base plate 26
The surface plate main body 28 and the surface plate main body 28 are bolted 36 at their peripheral portions from below through a spacer 34 penetrating the outer frame 32 of the pattern forming plate 30, and a cavity 38 is formed in the outer frame 32 of the pattern forming plate 30. Is formed. The platen body 28 has a large number of holes 4 communicating with the cavity 38 and the outside of the platen body 28.
0 is formed, and the base plate 26 is provided with a piping plug 42 communicating with the cavity 38. A vacuum pump 44 (see FIG. 1) is connected to the pipe plug 42, and the cavity 3
8 is evacuated and suction is performed in the holes 40 of the platen body 28, and the photosensitive material 24 is adsorbed on the platen body 28. The vertical and horizontal pieces 46 are arranged in the outer frame 32 of the pattern forming plate 30 to divide the cavity 38 into a plurality of areas, and the cavity 38
By vacuumizing each area, the suction area on the surface plate 18 can be made to correspond to the size of the photosensitive material 24 placed on the surface plate 18.

On the other hand, the upper surface of the casing 14 is lowered on the right side in FIG. 1, and the lowered portion is the film loading portion 52.
It is said. The film loading section 52 is covered with a large lid 54, and a rectangular hole 56 is formed in the large lid 54.
Is covered with a small lid 58. The large lid 54 and the small lid 58 are
Each of them can be opened and closed by rotating as shown by an arrow B in FIG. Open the small lid 58 and insert the original film 60 into the rectangular hole 5.
The original film 60 can be mounted on the film loading table 62 by inserting the original film 60 from the position 6.

As shown in FIG. 3, the film loading table 62.
Is a guide rail 64 arranged in the film loading section 52.
And the position thereof in the film loading portion 52 outside the casing 14 (position indicated by the solid line in FIG. 1) guided by the guide rails 66 arranged in the casing 14 following this.
And the position on the surface plate 18 in the casing 14 (see FIG.
Between the position indicated by the chain double-dashed line and the position shown in FIG. 3) through the inlet 70 in the horizontal direction, in the direction of arrow A and in the opposite direction of arrow A. The sprocket wheel 72 is rotationally driven by the motor 74, and the chain 76 wound around the sprocket wheels 72, 74 travels to move the film loading table 62.

The film loading table 62 has a rectangular frame 78. An overlay sheet (sheet-shaped member) 80 is provided inside the frame 78. The overlay sheet 80 has a rectangular and transparent flexible sheet shape. In the frame 78,
A pair of chains 82 are provided on both left and right sides when viewed from a direction perpendicular to the moving direction of the film loading table 62, and each chain 82 is sprocket wheel 8 axially supported by a frame 78.
It is wrapped around 4,86. Between the chains 82,
The two shaft members 88, 90 are bridged to form the shaft members 88, 9
The end of 0 corresponds to the fixed seat 83 of the chain 82.
The bolt 85 is fastened to the. The respective axial members 88, 90 support the respective left and right ends of the overlay sheet 80 when viewed in the moving direction of the film loading table 62, and the overlay sheet 80 is stretched. Sprocket wheel 84
Is rotated by a motor 92 and both chains 82 travel, whereby the overlay sheet 80 is orbitally moved in the direction of arrow D, and a position horizontally occupying the upper side in the frame 78 (position shown by a solid line in FIG. 1). ) And a position horizontally occupying the lower side thereof (position shown by a chain double-dashed line in FIG. 2).

A cylindrical portion 200 is formed at the end of the overlay sheet 80 corresponding to the shaft member 88, and the cylindrical portion 2 is formed.
A shaft member 88 is inserted into the shaft 00. An end portion of the overlay film 80 corresponding to the shaft member 90 is folded back along the peripheral surface of the shaft member 90 and has a U-shaped sandwiching member 212.
Fixed by

With the overlay sheet 80 positioned below the frame 78, the original film 60 is loaded on the film loading base 62, and the film loading base 62 moves.
As a result, the original film 60 becomes the overlay sheet 80.
Accepted on top.

The film loading table 62 includes a positioning plate 94. The positioning plate 94 is the four of the frame 78.
One of the two side portions is fixed by being stretched over between the side portions facing each other in the moving direction of the film loading table 62.
When 0 is located on the upper side in the frame body 78, it is arranged long along the end portion on the front side in the moving direction of the overlay sheet 80.

A pin bar 96 is detachably attached to the upper surface of the positioning plate 94. The pin bar 96
The manuscript film 60 is formed at a position corresponding to an end portion of the original film 60, and is formed in a long plate shape along the end portion. On the upper surface of the pin bar 96,
A plurality of positioning pins 98 are provided in a protruding manner at predetermined intervals along the longitudinal direction. A plurality of positioning holes 100 are formed in the end portion of the original film 60 corresponding to the positioning pins 98. When the original film 60 is loaded on the film loading table 62, the end portion of the original film 60 is placed on the pin bar 96, and the positioning pin 98 is inserted into the positioning hole 100. This allows the pin bar 9
The document film 60 is positioned with respect to 6.

Various kinds of pin bars 96 are prepared according to the size of the original film 60 and the like, and are selected appropriately.

As shown in FIGS. 3 and 6, a pressing plate 102 is provided on the positioning plate 94. The pressing plate 102 is formed in a long plate shape along the longitudinal direction of the positioning plate 94, and is hinged to the positioning plate 94 by a hinge 104 so as to be vertically rotatable. The positioning plate 94 has a shape in which both left and right sides are bent downward when viewed in the longitudinal direction. In the hinge 104, one rotating portion 302 via the rotating shaft 300 has a nut on the outer surface of the bending piece 304 on the side opposite to the original film 60 in the bending pieces 304 and 306 bent below the positioning plate 94. The bolt 308 is fastened by using the bolt 309, and the other rotating portion 310 is attached to the upper surface of the pressing plate 104 by using the bolt 312 and the stopper washer 314 locked at the tip of the bolt 312.

As shown in FIG. 5, the bolt through hole of the pressing plate 94 through which the bolt 312 penetrates is a long hole 3 elongated along the width direction of the pressing plate 104 in the direction perpendicular to the longitudinal direction.
The holding plate 104 is movable in the width direction as shown by the alternate long and short dash line in FIG. 6 within a range in which the bolt 312 is relatively movable along the longitudinal direction of the long hole 316. A magnet 106 is fixed to the lower surface of the pressing plate 104 on the hinge 104 side. The magnet 106 has a flexible plate shape. The pin bar 96 is made of a magnetic material and extends from the end of the original film 60, and the pressing plate 102 is magnetically attached to the extended portion via the magnet 106. On the lower surface of the pressing plate 104, the original film 6
A document retainer 318, which is elongated along the edge of 0 and is formed of a plurality of elastic portions that are elastically deformable independently, is fixed. As shown by the solid line in FIG. 6, the pressing plate 10
When 2 is magnetically attached to the pin bar 96 and is in a horizontal position, the document retainer 318 is brought into contact with the edge of the document film 60, and the edge of the document film 60 is retained by the retainer plate 1.
You can press 04. The positioning holes 100 at the ends of the original film 60 are prevented from coming off the positioning pins 98, and the original film 60 is prevented from falling off.

When the original film 60 is loaded on the film loading table 62, the pressing plate 104 is rotated upward against the magnetic force of the magnet 106, as shown by the chain double-dashed line in FIG. The presser 318 is separated upward from the original film 60, and the positioning pin 98 is inserted into the positioning hole 100 at the end of the original film 60.
It can be removed. A coil spring (biasing means) 320 is interposed between the pressing plate 104 and the positioning plate 94 at the end portion in the longitudinal direction, and the coil spring 320 biases the pressing plate 104 to rotate upward. . The urging force is smaller than the magnetic force of the magnet 106, and normally the pin bar 9 of the pressing plate 104 is
Magnetic attraction to 6 is maintained. When the pressing plate 104 rotates upward, the biasing force of the coil spring 320 increases the magnetic force of the magnet 106, and the pressing plate 104 is held at the upper position.

The document retainer 318 can be made of a porous material such as sponge tape, or a material such as a brush or a teremp that can be elastically deformed. As shown in FIG. 8, a female part 324 formed of a plurality of loops 322 and a male part 328 formed of a plurality of hooks 326 are provided as shown in FIG. 9, and these can be separated from each other. Although a fastener (velcro tape: trade name) that elastically engages with is known, the female portion 324 or the male portion 328 thereof can be used as the document retainer 318. In particular, the female portion 324 has an appropriate elastic force and is suitable as the document pressing member 318.

In the pressing plate 102 and the magnet 106, notches 350 and 352 are formed in the portions corresponding to the hinges 104 as shown in FIG. 5, and the pressing plate 102 moves along this width direction. Press plate 102, magnet 1
The interference between 06 and the hinge 104 is avoided.

Positioning holes 108 are formed on both ends of the positioning plate 94 in the longitudinal direction so as to project downward in the form of bosses.
The base plate 2 of the surface plate 18 corresponds to the positioning hole 108.
6 extends beyond the surface plate body 28 and the pattern forming plate 30 and a positioning pin 110 is projected on the upper surface of the extended portion. As shown in FIG. 1, the surface plate 18 is guided by the guide means 48 and can be moved up and down.
Driven by zero. When the film loading table 62 moves from the film loading section 52 in the direction opposite to the arrow A and is positioned on the surface plate 18, the overlay sheet 80 reversely moves from the lower position in the frame 78 to the upper position. Then, as shown in FIG. 6, the shaft member 90 reaches before the positioning pin 98 of the pin bar 96. Then, the surface plate 18 rises in the direction of arrow C and enters the frame 78. As shown in FIG.
The positioning pin 110 is inserted into the positioning hole 108 when the base plate 26 moves upward, and the upper surface of the extended portion of the base plate 26 of the surface plate 18 contacts the lower surface of the positioning hole 108 so that the surface plate 1
8 is stopped, and positioning between the surface plate 18 and the film loading table 62 is performed.

As a result, the original film 60 is superposed on the photosensitive material 24 placed on the surface plate 18 and covered with the overlay sheet 80.

As shown in FIG. 7, the overlay sheet 80
Is located on the upper surface of the surface plate main body 28.
As shown in FIG. 4, in the peripheral portion of the upper surface of the surface plate body 28,
The concave groove 112 is formed, and the concave groove 112 is formed in the base plate 26.
A pipe plug 118 is provided which communicates with the inside of the concave groove 112 through an opening 114 bored in the hole and a communication hole 116 corresponding to the hole 114 formed in the outer frame 32 of the pattern forming plate 30. A vacuum pump 44 is connected to the pipe plug 118, as in the case of the pipe plug 42, so that the inside of the concave groove 112 is sucked and the overlay sheet 80 is sucked onto the surface plate 18. As a result, the photosensitive material 24 and the original film 60 are brought into vacuum contact with the surface plate 18.

As shown in FIG. 1, above the surface plate 18,
An exposure unit 122 including a light source 120 is provided, and the exposure unit 1
The image recorded on the original film 60 is exposed (vacuum contact exposure) to the photosensitive material 24 by means of 22, and printing is performed.

After printing, suction in the concave groove 112 is stopped and the vacuum contact between the photosensitive material 24 and the original film 60 is released. Subsequently, the surface plate 18 is lowered, and the overlay film 80 is reversely moved in the direction of arrow A from the upper position in the frame body 78 to the lower position in the frame body 78, and the original film 60 is again moved. It is received on the overlay film 80. After that, the film loading table 62 moves in the direction of arrow A and returns to the film loading section 52, and the original film 60 can be replaced.

Joban 18, film loading table 62, exposure section 1
22 constitutes a vacuum contact exposure apparatus (contact exposure apparatus).

The suction on the surface plate 18 is stopped, the adsorption of the photosensitive material 24 onto the surface plate 18 is released, and the photosensitive material 24 after baking is again adsorbed by the adsorption unit 20 and is moved to the right in FIG. It is sent to the delivery unit 124. In the delivery section 124, the photosensitive material 24 is delivered to the processor section.

The processor section comprises a processing tank 126 for a developing layer, a bleach-fixing layer and a washing layer, and a drying section 127, and is arranged below the film loading section 52 in the casing 14. The photosensitive material 24 sequentially passes through each processing tank 126 to undergo development, bleach-fixing, and washing with water, and the photosensitive material 24 passes through a drying section 128 to be dried, and then exposed. The material 24 is discharged to the outside of the casing 14 through the discharge port 128.

According to the above construction, the photosensitive material 24 is the surface plate 1
8, the original film 60 is brought into close contact with the photosensitive material 24, and the photosensitive material 24 is exposed through the image of the original film 60.

Here, the positioning pin 110 of the surface plate 18 is inserted into the positioning hole 108 of the positioning plate 94 to position the positioning plate 94 with respect to the surface plate 18, and the end portion of the original film 60 is pin bar. 96
The original film 60 is placed on the pin bar 96, and the positioning pin 98 of the pin bar 96 is inserted into the positioning hole 100 at the end of the original film 60 to position the original film 60 with respect to the pin bar 96.

On the other hand, the pressing plate 102 brings the original pressing plate 318 into contact with the original film 60, and the original film 6 is pressed.
Hold the end of 0. As a result, the positioning pin 98 is prevented from coming out of the positioning hole 100, and the end portion of the original film 60 is prevented from falling off.

In the document holder 318, for example, a plurality of loops 322 can be elastically deformed independently of each other, and follow the subtle movements of the document film 60 to allow the movements thereof, thereby causing wrinkles and misregistration. Occurrence is prevented and the register is stabilized.

The holding plate 102 is the magnet 10
6 is magnetically attached to the pin bar 96, and the original film 6
The position where the 0 end is pressed is normally set. By rotating the pressing plate 102 upward, the positioning pin 98 can be inserted into and removed from the positioning hole 100.

It should be noted that the pressing plate may normally take a position for pressing the end portion of the original film 60 by its own weight.

The pin bar 96 needs to be replaced because it depends on the size of the original film 60, and the pin bar 96 is peeled off and attached to the positioning plate 94.
Even if the sticking position of the pin bar 96 is different along the width direction of the pressing plate 102 for each sticking, the pressed plate 102 moves along this width direction, and the original film is pressed via the original pressing plate 318. The position where 60 is pressed can be properly obtained.

The pin bar 96 is the original film 60.
Since it is elongated along the end portion of the, it is expected that undulation due to the lengthwise dimension or undulation due to long-term use will occur. According to the configuration in which the pressing plate 102 is magnetically attached to the pin bar 96 by using the magnet 106, the pressing plate 102 and the pin bar 96 can be made to conform to each other by the magnetic attachment force, and the document pressing 318 is performed.
Are evenly contacted with the original film 60.

[0054]

As described above, in the original film holding structure of the present invention and the contact exposure apparatus provided with the original film holding structure, the register is stabilized.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a plate inspection creation apparatus.

FIG. 2 is an external perspective view of a plate inspection making apparatus.

FIG. 3 is an exploded perspective view showing a platen and a film loading table (contact exposure apparatus) of a plate inspection creation apparatus to which a document film holding structure according to an embodiment of the present invention is applied.

FIG. 4 is an exploded perspective view of a surface plate.

FIG. 5 is an exploded perspective view showing a document film holding structure according to the present embodiment.

FIG. 6 is a front view showing the original film holding structure according to the present embodiment (a diagram in which the frame body of the film loading table is omitted).
It is.

FIG. 7 is a plan view showing the relationship between the surface plate, the photosensitive material, the original film, and the overlay film.

FIG. 8 is a diagram showing a female portion of a fastener formed of a plurality of loops as an example of document pressing.

FIG. 9 is a view showing a male part of a fastener formed of a plurality of hooks as an example of document pressing.

FIG. 10 is a front view showing a conventional original film holding structure.

[Explanation of symbols]

 18 Surface plate 24 Photosensitive material 60 Original film 94 Positioning plate 96 Pin bar 98 Positioning pin 100 Positioning hole 102 Holding plate 104 Hinge (rotating means) 106 Magnet 316 Long hole (moving means) 318 Original pressing 322 Loop (elastic part) 324 Fastener Male part (elastic part) 328 Female part (elastic part) of fastener

Claims (4)

[Claims] 1. A manuscript film in which a manuscript film is brought into close contact with a light-sensitive material placed on a surface plate and the light-sensitive material is exposed through an image of the manuscript film, and a positioning hole is formed at an end thereof. The original film, a positioning plate elongated along an edge of the original film and positioned with respect to a surface plate, elongated along the longitudinal direction of the positioning plate,
The upper surface has positioning pins corresponding to the positioning holes and is removably affixed to the positioning plate. The end portion of the original film is placed on the upper surface, and the positioning pins are inserted into the positioning holes to remove the original film. A pin bar for positioning, a holding plate which is elongated on the positioning plate along the longitudinal direction of the positioning plate, and which holds the end portion of the original film on the pin bar, and a longitudinal direction of the holding plate. An elongated document retainer that is fixed to the lower surface of the retainer plate so as to contact the edge of the document film and is formed of a plurality of elastic portions that can be independently elastically deformed, and the retainer plate that is rotatable. It is supported by the positioning plate, and the holding plate, which is the normal position, presses the document film by bringing the document holder into contact with the document film. Rotation means for obtaining a position and a position for rotating the positioning pin into and out of the positioning hole of the positioning pin, and the pressing plate movably in the width direction which is the direction perpendicular to the longitudinal direction. An original film holding structure comprising: a moving means for supporting the original film. 2. The original film holding structure according to claim 1, further comprising a magnet that is provided between the pressing plate and the pin bar and that magnetically attaches the pressing plate to the pin bar. 3. The original film holding structure according to claim 1, wherein the elastic portion is formed of a plurality of loops. 4. A contact exposure apparatus comprising the original film holding structure according to claim 1.