JP3327679B2 - Original film positioning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original film positioning method for positioning an original film on a photosensitive material placed on a surface plate.

[0002]

2. Description of the Related Art Heretofore, a plate inspection apparatus has been known which comprises a transport section for transporting and positioning a photosensitive material and an original film developed and processed after disassembly and exposure, and an original arranged correspondingly on the surface plate. An exposure unit for exposing the image of the film to the photosensitive material, and a processor unit for developing the exposed photosensitive material are provided. A manuscript film is prepared for each color separation component and is made into one set of a plurality of sheets. The plate inspection apparatus applies a plurality of manuscript films to the one photosensitive material positioned on the surface plate by the exposure unit. Are sequentially exposed.
The exposed photosensitive material is conveyed from the exposure unit to the processor unit via the delivery unit, where it is subjected to development, bleach-fixing, washing and drying. With the processed photosensitive material, it is possible to check in advance before actual printing. Thus, for example, when there is a problem with the color condition, image position, character error, or the like of the photosensitive material, it is possible to correct the original film and the like before printing a large amount by a printing machine.

As shown in FIG. 7, the original films 170 prepared for each color separation component need to be accurately positioned at predetermined positions on the surface plate 174. The original film 170 is positioned by a pin bar 176.

[0004] That is, the pin bar 176 is attached to the surface plate 174.
Is attached to the upper surface of a base 178 provided with a hole 178A for fitting with a pin 174A protruding from the pin bar 174A.
A positioning pin 176A protrudes from 6. The positioning pins 176A are provided with holes 170 of the original film 170.
By inserting A, the original film 170 can be positioned. In this state, the flexible magnet plate 172 is attached to the base 178 and the original film 1.
By magnetically attaching the original film 170 to the original film 70, the original film 170 is prevented from dropping from the positioning pins 170A.

[0005] Here, the original film 170 is placed on the platen 17.
It is necessary to squeeze on the surface 4 to remove air bubbles and bring the photosensitive material 180 into close contact with the surface plate together with the photosensitive material 180 already mounted on the surface plate.

[0006]

However, since the original film 170 is fixed by the magnet 172, the original film 170 cannot be completely moved during squeezing and causes a positional shift (register shift).

The present invention has been made in consideration of the above circumstances, and has as its object to provide a method of positioning an original film that can securely hold the original film in a positioned state and that can be leveled during squeezing on a surface plate.

[0008]

According to a first aspect of the present invention, there is provided a method of positioning an original film for superposing and positioning an original film on a photosensitive material placed on a surface plate. A pin bar is arranged at a predetermined position on the surface, a document film is loaded on the positioning pin of the pin bar, one end of the plate material is fixed to the base surface, and the other end of the pin bar is positioned higher than the upper surface of the document film. By extending to the positioning pin and covering one end of the original film, it is prevented from falling off from the positioning pin, and the range of the tolerance between the positioning pin of the original film and the pin bar of the original film when squeezing the original film and the photosensitive material on the surface plate. It is characterized in that it allows movement only within the area.

[0009]

According to the first aspect of the present invention, the original film inserted and positioned on the positioning pins of the pin bar is covered with the plate material at one end without pressing the original film. Movement only within the range is allowed. For this reason, it is possible to level the surface when squeezing on the surface plate, and it is possible to reliably remove bubbles and the like, so that flatness is ensured and misalignment (registration misalignment) can be prevented. Also, the original film does not fall off the positioning pins.

[0010]

1 and 2 show a plate inspection apparatus 10 according to this embodiment. First, the overall configuration of the plate inspection apparatus 10 will be described.

As shown in FIG. 1, a plate inspection apparatus 10
The magazine loading section 100 is disposed on the left side of the casing 12 in FIG. The magazine loading section 100 is loaded with two magazines 102 each containing the photosensitive material 14. Photosensitive material 1 extracted from one magazine 102
1 is pulled out of the magazine 102 substantially upward in FIG. 1, turned in a substantially right angle direction by an insertion guide, and then conveyed diagonally upward or diagonally downward, and further conveyed horizontally. Is converted. Also,
The photosensitive material 14 pulled out of the magazine 102 is cut by a cutter 116 to a predetermined length.

The photosensitive material 14 whose transport direction has been changed horizontally.
Is transported by the photosensitive material transport section 26 to a surface plate section 28 disposed adjacent to the magazine loading section 100. The platen 28 includes a platen 42 for placing and positioning the photosensitive material 14, and a moving mechanism 43 for moving the platen up and down. As shown in FIG. 4, the surface plate 42 is provided with a plurality of suction holes 42A so that the photosensitive material 14 and the like can be sucked and supported. A pair of positioning pins 45 are provided at both ends of a predetermined side of the surface plate 42, and a circular hole 82 and a long hole 84 provided in a positioning plate 88 described later.
Is used for positioning with the original film 16 conveyed onto the surface plate 42 by fitting. The positioning pin 45 has a columnar shape on the base side and a tapered tip end. For this reason, the insertion into the circular hole 82 and the long hole 84 is facilitated, and after positioning, it can correspond to the cylindrical portion on the base side.

An exposure unit 30 is disposed above the platen unit 28 in FIG. 1, and a light source unit 40 of the exposure unit 30 transports the photosensitive material 14 on a platen 42 of the platen unit 28. It is configured to reciprocate in a direction perpendicular to the direction.

In the plate inspection making apparatus 10 of the present embodiment, a processor 34 is provided beside the surface plate 28 via a photosensitive material delivery unit 32.

The processor section 34 includes a processing tank 54 in which developing tanks 46 and 47, a bleach-fixing tank 48, washing tanks 50 and 52 are formed, and a drying section 56.

In the processor section 34, the photosensitive material 14 exposed on the surface plate section 28 is subjected to development, bleach-fixing and washing processes, and is further dried and taken out.

The upper side of FIG. 1 of the processor section 34 is a film loading section 36 for loading the original film 16 (see FIG. 2). The film loading section 36 is arranged above the ceiling member 58 of the processor section 34. For this reason, the height dimension of the film loading section 36 is relatively low, which is about the waist position of the worker. Film loading unit 36
Is covered by the large lid 24. The large lid 24 is attached via a hinge. For this reason, the large lid 24
Is opened by rotating about a hinge.
The large lid 24 is provided with a rectangular hole 60, and the small lid 62 is attached via a hinge. Thus, the small lid 62 is configured to be opened by gripping the handle 64 and rotating the plate making apparatus 10 from the near side to the far side in FIG. The small lid 62 is opened when the original film 16 is loaded into the film loading section 36. A lock mechanism is attached to the periphery of the rectangular hole 60 so that the lock can be performed with the small lid 62 closed.

The film loading section 36 has an overlay sheet 66 on which the original film 16 is placed (see FIG. 2).
A frame-shaped support base 68 to which is attached is disposed, and is capable of reciprocating with the base plate 28. That is, the film loading section 36 and the exposure section 30 are communicated with each other through the rectangular holes 70. The rectangular hole 70 is opened when the support base 68 moves, but is shielded otherwise.

As shown in FIG. 5, the support base 68
A positioning plate 88 to which a size plate (hereinafter, referred to as a pin bar) 86 for positioning according to the size of the document film 16 can be attached is attached. Pin bar 8
6, a plurality of positioning pins 86A are formed so as to protrude. Correspondingly, positioning holes 16A are provided in the original film 16, and the positioning pins 8A are provided in the positioning holes 16A.
By inserting 6A, pin bar 86 and document film 16 can be positioned.

Here, as shown in FIG. 6, a rectangular square rod-shaped magnet 160 is attached to the positioning plate 88. Height H of this magnet 160
Is slightly higher than the height J up to the upper surface of the original film 16 in a state where it is positioned on the positioning pins 86A of the pin bar 86. A metal plate 162 can be magnetically attached to the magnet 160. This plate 1
The longitudinal dimension is provided at the same length along the longitudinal direction of the magnet 160. On the other hand, the short side dimension extends to a position short of the positioning pin 86A of the pin bar 86.

For this reason, after the original film 16 is mounted on the positioning pins 86A, the plate member 162 is
, One end of the document film 16 can be covered. With this coating, the original film 1
No. 6 cannot be dropped by at least the axial movement of the positioning pin 86A alone.

However, the pressing force against the original film 16 does not work, and therefore,
In other words, the movement of the positioning pin 86A in the direction perpendicular to the axis is allowed by the dimensional tolerance between the positioning pin 86A and the positioning hole 16A.

The positioning plate 88 has a narrow width and both ends in the longitudinal direction are mounted in a groove (not shown) provided in the support base 68.

A rectangular auxiliary member 90 for increasing the wall thickness is attached near both longitudinal ends of the positioning plate 88 and on the lower surface. At the position where the auxiliary member 90 is attached, a circular hole 82 and a long hole 84 that penetrate the positioning plate 88 and the auxiliary member 90 are provided. In addition,
The short side dimension of the long hole 84 matches the inner diameter of the circular hole 82. The circular holes 82 and the elongated holes 84 have a role as a means for positioning the original film 16 on the platen 42 together with the positioning pins 45 provided at both ends of one side of the platen 42.

That is, after the pin bar 86 is stuck on the positioning plate 88 and the original film 16 is mounted, the pin bar 86 is moved together with the support base 68 onto the surface plate 42.
When the surface plate 42 rises, the positioning pins 45 of the surface plate 42 are inserted into the circular holes 82 and the long holes 84, whereby the relative positions of the two can be determined.

At the time of positioning the base 42 and the support base 68, the original film 16 is placed on the photosensitive material 1 on the base 42.
4 will be superimposed. Here, when the overlay sheet 66 is further superimposed on the original film 16, the overlay sheet 66 is squeezed by a squeeze roller (not shown), and air bubbles remaining between the surface plate 42 and the photosensitive material 14 and between the materials are exhausted. A so-called break-in is performed so as to make close contact.

At this time, each material moves within each plane. However, since the original film 16 can move within the tolerance range between the positioning pins 86A and the positioning holes 16A. , The above-mentioned leveling is performed reliably.

The exposure section 30 exposes the image recorded on the original film 16 to the photosensitive material 14, and thereafter the support base 68 returns to the film loading section 36 again.

The plate inspection apparatus 10 of this embodiment is a Y plate,
The above process is repeated using each original film 16 that has been color-separated into a plate, a C plate, and a BK (sumi) plate. Before producing a production printing plate, make sure that the layout of the original film 16 is correct. This is a device for inspecting whether there is any error, whether there is a character error or the like. The original film is positioned one by one, overlapped on the photosensitive material 14 and subjected to multiple close contact exposures to create a color photograph in the same state as the printed matter. In this way, an error in the original film is found, and the original can be corrected in advance. In this embodiment, in the case of a positive photosensitive material, the original film 16 is a BK (Sumi) plate for the Y plate and a B
The BK (Sumi) plate is superimposed on the K (Sumi) plate and the C plate, respectively, and the BK (Sumi) plate is sequentially brought into close contact with the photosensitive material 14, and exposure is performed using B (blue), G (green), and R (red) as filters, respectively. Original film 16 for negative photosensitive material
Y, M, C, and BK (Sumi) plates as photosensitive materials 1
4, and exposure is performed using filters for B (blue), G (green), R (red), and BK (sumi), respectively.

As shown in FIG. 1, a control device 38 is provided below the surface plate section 28 to control the conveyance of the photosensitive material 14, the drive control of the support base 68 of the film loading section 36, and the like.
Exposure control of the exposure unit 30, a magazine exchange instruction to a notifying unit (not shown), a temperature of a processing liquid
Each control such as a drying temperature and a transport speed is performed.

Next, the operation of this embodiment will be described. At first,
The processing procedure of the plate inspection creating device 10 will be described with reference to the flowchart of FIG.

When the operation switch is turned on in step 200, in step 202 the photosensitive material 1
It is determined whether or not a signal indicating that the cutting of the designated length of No. 4 has been completed is input. If the determination is affirmative, the process proceeds to step 204. In step 204, the photosensitive material initial conveyance control is performed. That is, the photosensitive material 14 cut into a predetermined length is transferred to the surface plate 2 by the photosensitive material transport unit 26.
To 8.

In the next step 206, surface plate standby control is performed, and then in step 208, original film transport control is performed. That is, the original film 16 is placed on the overlay sheet 66 of the film loading unit 36 and is moved onto the surface plate unit 28.

Next, at step 210, exposure standby control is performed, and then at steps 212, 214 and 21.
At 6, exposure control is performed. That is, in the case of a positive photosensitive material, the original film 16 is a BK plate for the Y plate,
Photosensitive material 1 with BK plate on plate and BK plate on C plate
4 and then exposure is performed through B, G, and R filters.

In the case of a negative type photosensitive material, the Y, M, C and BK plates are used as the original film 16 for the photosensitive material 1.
4 and then exposed through filters for B, G, R, and BK.

When the exposure is completed, the support base 68 is moved to the film loading section 36 and is on standby.
From 16, the process proceeds to step 218, where the control of conveying the exposed photosensitive material is performed.

Next, at step 220, photosensitive material delivery control is performed. That is, the exposed photosensitive material is conveyed to the processor unit 34, and development processing (development, bleach-fixing, and water washing) is performed in step 222, and then the photosensitive material 14 that has been dried is processed into the casing 12 Is taken out from the outlet 22 formed in the container.

In the above processing steps, the original film 16
Is mounted on the support base 68, first, a pin bar 86 corresponding to the size of the document film 16 is stuck on the positioning plate 88. At this time, the positioning accuracy is not particularly limited, but it is necessary to maintain the attached state until the processing of all four color separation documents is completed.

The original film 16 is aligned with the pin bar 86.
When mounting, the overlay sheet 66 is
And serves as a support for the original film 16. For this reason, the original film 16 can be mounted in the frame of the support base 68.

Here, the positioning pin 86 of the pin bar 86
One end of the original film 16 into which A is inserted is covered by the plate member 162. That is, by magnetically attaching the plate member 162 on the magnet 160 attached to the positioning plate 88, the plate member 162 is attached to the original film 1 with a slight gap from the original film 16.
6. In addition, since the short-side end of the plate member 162 is located near the positioning pin 86A,
The original film 16 does not fall off only by moving the positioning pins 86A in the axial direction. Therefore, the state of attachment to the pin bar 86 can be maintained without holding down the original film 16.

The support base 68 on which the original film 16 is mounted is moved onto the surface plate 42 as described above, and the surface plate 42 is raised in a state where the overlay sheet 66 is in the upper position by the rotation of the sprocket 92. , Surface plate 4
The positioning pins 45 provided on the positioning plate 2 are inserted into the circular holes 82 and the elongated holes 84 of the positioning plate 88. At this time, since the positioning plate 88 has some backlash with respect to the support base 68, while being guided by the positioning pin 45,
The platen 42 and the positioning plate (ie, the original film 1)
6) can be performed.

The positioning pin 45 has a cylindrical shape on the base side and is tapered at the tip, so that it can be easily inserted into the circular holes 82 and the elongated holes 84, and after the positioning. Can correspond to the column portion on the base side.

When the platen 42 rises, the overlay sheet 66 comes into close contact with the original film 16. Thereafter, by rolling the squeeze roller on the overlay sheet 66, the air bubbles remaining between the surface plate 42 and the photosensitive material 14 and between the respective materials are exhausted, and the respective materials are completely adhered. At the time of squeezing (squeezing) by the squeeze roller, each material may move in each plane. At this time,
As shown in FIG. 7, the original film 170 was pressed down by the flexible magnet 172, so that this leveling could not be performed sufficiently.

In the present embodiment, however, the original film 16 is not pressed down by the
6 is prevented, the leveling can be sufficiently performed, and the adhesiveness of each material can be improved.

In this embodiment, the plate member 162 and the magnet 160 are separated from each other. However, the plate member 162 and the magnet 160 may be connected by a hinge or the like so that the space for mounting the original film 16 on the pin bar 86 can be opened and closed.

Further, the plate member 162 may be brought into contact with the tip of the positioning pin 86A of the pin bar 86.

[0047]

As described above, the original film positioning method according to the present invention has an excellent effect that the original film can be securely held in the positioned state and can be smoothed when squeezing on the surface plate.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an internal structure of a plate inspection making device.

FIG. 2 is a perspective view of a plate inspection creating apparatus.

FIG. 3 is a control flowchart showing a flow of the entire apparatus.

FIG. 4 is a plan view of a surface plate.

FIG. 5 is a perspective view of a support base.

FIG. 6 is a cross-sectional view when the positioning plate of the support base is positioned with respect to the surface plate.

FIG. 7 is a cross-sectional view showing a conventional structure corresponding to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Plate inspection apparatus 14 Photosensitive material 16 Original film 16A Positioning hole 32 Photosensitive material delivery part 45 Positioning pin 68 Support base 86 Pin bar 86A Positioning pin 160 Magnet 162 Plate material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-181201 (JP, A) JP-A-2-89058 (JP, A) Fully open Showa 55-103643 (JP, U) 50464 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 27/02-27/30 G03B 27/58-27/64 G03F 1/00-1/16 G03F 7/20 -7/24

Claims (1)

(57) [Claims] An original film positioning method for positioning an original film by superimposing the original film on a photosensitive material placed on a surface plate, wherein the pin bar is disposed at a predetermined position on a base surface. The original film is loaded on the positioning pins, and one end of the plate is fixed to the base surface, and the other end is extended to the positioning pin of the pin bar at a position higher than the upper surface of the original film, and one end of the original film is fixed. By covering, the positioning pin is prevented from falling off, and movement of the original film and the photosensitive material is allowed only within the tolerance of the positioning pin of the pin bar of the original film when squeezing on the surface plate. Document film positioning method.