JPH0784315A - Photosensitive material conveying method and its device - Google Patents

Abstract

PURPOSE:To decide the disposal of a photosensitive material according to the length of the photosensitive material withdrawn in the exchanging timing of a magazine and to smoothly remove the magazine while minimizing the rest amount. CONSTITUTION:If the front end of a photosensitive material 14 is not detected when the rear end is detected by a rear end detecting sensor 72, an exchange of magazine 102 with the pulled out photosensitive material 14 or an exchange of the magazine 102 after pulling out of all the rest of the photosensitive material 14 and conveying of it to an exposure unit is directed, while the photosensitive material 14 is discharged in unexposed condition to the outside of the device. When the front end of the photosensitive material 14 is detected and ¦M+C-S¦<L, the photosensitive material 14 is cut by the length complying with the specified size, and ordinary exposure is carried out only once, and then, an exchange of the magazine 102 is directed. When the front end of the photosensitive material 14 is detected and in the case of ¦M+C-S¦>=L, the photosensitive material 14 is cut to be conveyed to the exposure unit, replacement of the magazing 102 is directed, and then, the photosensitive material 14 is discharged in unexposed condition to the outside of the device. In this way, the pulled out photosensitive material 14 receives extremely less damage, and removing work of fragments is facilitated even in the case of damage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive material conveying apparatus for pulling out a long photosensitive material stored in a magazine, cutting it according to a specified size, conveying it to an exposure position, exposing it, and processing it. A method and apparatus.

[0002]

2. Description of the Related Art A long photosensitive material is wound into a magazine and accommodated in layers, and the uppermost layer of the photosensitive material is sequentially drawn out from an outlet of the magazine, cut into a predetermined length and sent to an exposure position. In comparison with a case where sheets are cut in advance according to a predetermined size, stacked and loaded into a cassette, or inserted one by one by a manual operation of an operator, a large amount of photosensitive material is relatively small. Since it can be accommodated in a magazine, the work of exchanging the magazine can be reduced, and various sizes can be accommodated.

For example, a large amount of color printing can be performed by a printing machine as a processing apparatus equipped with the above-mentioned magazine accommodating type conveying section.
For example, color advertisements attached to newspapers (so-called insert advertisements)
There is a plate inspection creating apparatus (color proof creating apparatus) that creates a check printing plate (plate inspection) before actually printing.

The plate inspection device is provided with a platen portion on which the photosensitive material and the original film which has been developed after the decomposition exposure are conveyed and positioned, and an image of the original film which is arranged on the surface plate portion in correspondence with the photosensitive material. An exposure unit for exposing, a processor unit for developing the exposed photosensitive material, and a delivery unit for delivering the photosensitive material from the surface plate unit to the processor unit are provided. An original film is prepared for each color separation component and a set of a plurality of sheets is provided, and the plate inspection preparation apparatus forms a plurality of original films by the exposure section onto one photosensitive material positioned on the surface plate section. Are sequentially exposed. The exposed light-sensitive material is conveyed from the surface plate section to the processor section via the delivery section, and is subjected to development, bleach-fixing, washing with water and drying. The processed light-sensitive material can be checked in advance before the actual printing. Thus, for example, when there is a problem in the color condition, image position, character error, etc. of the photosensitive material, it is possible to correct the original film before printing a large amount on the printing machine.

There are generally three types of photosensitive materials used in this plate inspection device, positive paper, negative paper and positive film, and the widths of these photosensitive materials are 610 mm, 485 mm and 357 mm, respectively. There are various types, and any one of nine types of photosensitive materials is used for the plate inspection device. Therefore, by adopting a magazine type for storing the photosensitive material, it is possible to reduce the replacement work according to the size and to cope with the above size.

A trailing edge mark is provided in the vicinity of the trailing edge of the photosensitive material in advance. When the trailing edge mark is detected, the conveyance is stopped and the magazine is instructed to be replaced.

[0007]

However, the photosensitive material pulled out from the magazine is sent into the processing device for a considerable length at the time when its rear end is detected, and is held by the holding and conveying rollers in the device. There are cases. If the magazine is removed in such a state, tension may be applied to the photosensitive material pulled out from the magazine and the photosensitive material may be broken. For this reason, it takes time and effort to remove the debris remaining in the device, and it becomes difficult to remove the debris depending on the location of the debris. If a small piece is overlooked, it may cause jamming (paper jam) in the next processing.

In consideration of the above facts, the present invention makes it possible to remove the magazine smoothly by determining the disposal direction of the photosensitive material according to the length of the photosensitive material drawn out at the time of exchanging the magazine and smoothly removing the magazine. And to obtain a device.

[0009]

According to a first aspect of the present invention, a long photosensitive material stored in a magazine is pulled out,
A method of conveying a photosensitive material for cutting according to a designated size, conveying to an exposure position and exposing, and detecting a vicinity of a rear end of the photosensitive material pulled out from the magazine, a designated size. And whether to continue the exposure, based on the remaining usable length of the light-sensitive material,
When continuation of exposure is selected, the magazine is replaced after performing the exposure once, and when stop of exposure is selected, the magazine is replaced in an unexposed state.

According to a second aspect of the present invention, when the stop of the exposure is selected, the magazine is exchanged after cutting the drawn photosensitive material.

According to a third aspect of the present invention, the magazine is exchanged together with the pulled-out photosensitive material when the stop of the exposure is selected.

According to a fourth aspect of the present invention, there is provided a photosensitive material transporting apparatus for pulling out a long photosensitive material stored in a magazine, cutting it according to a designated size, and transporting it to an exposure position for exposure. Therefore, a trailing edge mark detection sensor for detecting a trailing edge mark provided on the photosensitive material in advance at a position immediately after being pulled out from the magazine, and a trailing edge mark detection sensor disposed a predetermined length downstream from the trailing edge mark detection sensor. A cutter that cuts the photosensitive material, a photosensitive material tip detection sensor that is provided downstream of the cutter for a predetermined length to detect the presence or absence of the photosensitive material, and a tip of the photosensitive material that is detected by the photosensitive material tip detection sensor. It has a transport length measuring means for measuring the transport length after the detection of, and a control means for instructing any one of the following (a), (b) and (c) by the notifying means. (A) When the trailing edge mark detection sensor detects the trailing edge mark provided on the photosensitive material, and the photosensitive material leading edge detection sensor does not detect the photosensitive material,
The magazine is instructed to be replaced after each of the drawn photosensitive materials or all of the remaining photosensitive materials are drawn and conveyed to the exposure position. (B) When the trailing edge mark detecting sensor detects the trailing edge mark provided on the photosensitive material, the photosensitive material leading edge detecting sensor detects the photosensitive material, and the trailing edge detecting sensor detects the photosensitive material. If the length up to the tip of is longer than the length corresponding to the designated size, the photosensitive material is cut at the designated length, exposed once, and then the magazine is instructed to be replaced. (C) When the trailing edge mark detection sensor detects the trailing edge mark provided on the photosensitive material, the leading edge detection sensor detects the photosensitive material, and the trailing edge detection sensor detects the leading edge of the photosensitive material. If the length is shorter than the length corresponding to the specified size, the photosensitive material is cut at the time when the trailing edge of the photosensitive material is detected, the photosensitive material is conveyed to the exposure position, and then the magazine is instructed to be replaced.

[0013]

According to the first aspect of the present invention, when the vicinity of the rear end of the photosensitive material pulled out from the magazine is detected, the amount of withdrawal (remaining usable length) is longer than the designated size. In that case, since one more exposure is possible,
Change the magazine after one exposure. As a result, the length of pulling out the photosensitive material at the time of exchanging the magazine is short (corresponding to the length from the magazine outlet to the cutting position), and the pulled photosensitive material is not accidentally damaged.

On the other hand, if the withdrawal amount is shorter than the designated size, the exposure is stopped. In this case, as in the second aspect of the invention, the magazine is replaced after cutting the drawn photosensitive material. In this case, if the cut photosensitive material is conveyed in the apparatus in an unexposed state and discharged, the interval until the next processing can be shortened.

Further, the magazine is replaced together with the photosensitive material pulled out as in the third aspect of the invention. in this case,
The length of the photosensitive material pulled out as in the past is not completely unknown, and it is clear that it is less than a certain length, so the possibility of damage to the photosensitive material is extremely small, even if there is damage. Because the location of the fragments is limited,
Subsequent work (debris removal work) can be done smoothly.

According to the fourth aspect of the invention, exposure is performed according to the length of the photosensitive material pulled out from the magazine at the time when the trailing edge mark provided on the photosensitive material is detected by the trailing edge mark detection sensor. Judging whether or not to continue, it is decided to dispose of the remaining photosensitive material, and the magazine replacement procedure is instructed.

(A) When the photosensitive material front end detection sensor does not detect the photosensitive material (when the front end of the photosensitive material has not reached), it is impossible to continue the exposure. Alternatively, after all the remaining photosensitive material is pulled out and conveyed to the exposure position, replacement of the magazine is instructed.

(B) The light-sensitive material is detected by the detection sensor at the front end of the light-sensitive material (when the front end of the light-sensitive material reaches),
When the length from the trailing edge detection sensor to the leading edge of the photosensitive material is longer than the length corresponding to the designated size, one more exposure is possible. Therefore, the photosensitive material is cut into a length corresponding to the designated size, the normal exposure is performed, and then the replacement of the magazine is instructed.

(C) The photosensitive material leading edge detection sensor detects the photosensitive material (when the leading edge of the photosensitive material has arrived), but the length from the trailing edge detection sensor to the leading edge of the photosensitive material is specified. If it is shorter than the length corresponding to the size,
After the photosensitive material is cut and conveyed to the exposure position, the magazine is instructed to be replaced.

As described above, the magazine is instructed to be replaced after the disposal of the photosensitive material is decided according to the length of the photosensitive material drawn out from the magazine.
It is extremely unlikely that the pulled-out photosensitive material will be broken by a tension for pulling back the photosensitive material, and even if it is broken, the position of the broken piece is limited, so that the work of removing the broken piece becomes easy.

Further, when the pull-out length is a processable length, the processing is continued, so that the photosensitive material is not wastefully discarded.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 to FIG. 3 show a plate inspection making apparatus 10 according to this embodiment. First, the overall configuration of the plate inspection creation apparatus 10 will be described.

As shown in FIG. 1, the plate inspection device 10
The magazine loading unit 100 is disposed on the left side surface of the casing 12 in FIG. Two magazines 102 containing the photosensitive material 14 are loaded in the magazine loading unit 100. Photosensitive material 1 drawn from one magazine 102
4, the front end portion is pulled out from the magazine 102 substantially upward in FIG. 1 and is changed in a direction substantially at a right angle by the insertion guide 134 (see FIG. 2), and then is conveyed obliquely upward or downward. , The transport direction is changed to the horizontal direction. The photosensitive material 14 drawn out from the magazine 102 is cut into predetermined lengths by a cutter 116.

Photosensitive material 14 whose conveying direction is horizontally changed
Is conveyed by the photosensitive material conveying section 26 to a surface plate section 28 disposed adjacent to the magazine loading section 100. An exposure unit 30 is arranged above the surface plate unit 28 in FIG. 1, and a light source unit 40 of the exposure unit 30 is orthogonal to the conveying direction of the photosensitive material 14 on the surface plate 42 of the surface plate unit 28. It is configured to reciprocate in the direction.

In the inspection plate making apparatus 10 of this embodiment, a processor section 34 is arranged next to the surface plate section 28 via a photosensitive material delivery section 32.

The processor section 34 is composed of developing tanks 46 and 47 partitioned by a partition wall 44, a bleach-fixing tank 48, a processing tank 54 in which 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 processing such as development, bleach-fixing and washing with water, and is further dried and taken out.

An upper side of the processor section 34 in FIG. 1 is a film loading section 36 for loading the original film 16 (see FIG. 3). 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, and is about the waist position of the worker. Film loading section 36
Are covered by a large lid 24. The large lid 24 is attached via a hinge. Therefore, the large lid 24
Is released by rotating the hinge around the center.
A rectangular hole 60 is provided in the large lid 24, and a small lid 62 is attached via a hinge. As a result, the small lid 62 is configured to be opened by gripping the grip 64 and rotating it from the front side of 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 small lid 62 can be locked in a closed state.

An overlay sheet 66 on which the original film 16 is placed (see FIG. 3) is provided in the film loading section 36.
A frame-shaped support base 68 to which is attached is disposed, and is capable of reciprocating with respect to the surface plate portion 28. That is, the film loading section 36 and the exposure section 30 are communicated with each other by the rectangular hole 70. The rectangular hole 70 is opened when the support base 68 is moved, but is shielded at other times.

The support base 68 conveys the original film 16 loaded by the film loading section 36 to the surface plate section 28,
The image recorded on the original film 16 is printed on the photosensitive material 14
And has a function of returning to the film loading section 36 again after the exposure. The plate inspection preparation apparatus 10 of the present embodiment uses the original film 16 which is color-separated into Y plate, M plate, C plate and BK (smear) plate, and lays out the original film 16 before making a production printing plate. Is a device for inspecting whether there is an error, whether there is a color difference, whether there is an error in characters, and the like.
4 is used for multiple contact exposure to create a color photograph in the same state as the printed matter, thereby detecting an error in the original film and correcting the original in advance. In the present embodiment, in the case of a positive type photosensitive material, the original film 16 is overlaid with a BK (Sumi) plate on the Y plate, a BK (Sumi) plate on the M plate, and a BK (Sumi) plate on the C plate. Sequentially adhere to 14 and use B (blue) and G as filters respectively.
(Green) and R (red) are used for exposure. In the case of a negative type photosensitive material, the original film 16 is a Y plate, M
The plate, the C plate, and the BK (sumi) plate are sequentially brought into close contact with the photosensitive material 14, and exposure is performed using B (blue), G (green), R (red), and BK (sumi) as filters, respectively. ing.

As shown in FIG. 1, a controller 38 is disposed below the surface plate section 28, and controls 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, instruction of magazine replacement to a notification means (not shown), temperature of the processing liquid of the processor unit 34,
Each control such as the drying temperature and the conveying speed is performed.

The structure of the magazine loading section 100 will be described in detail below. The side plate 11 at the left end of the plate inspection making apparatus 10 is bent at an intermediate portion in the vertical direction, and an inclined surface 11A is formed upward from the intermediate portion, and is substantially perpendicular to the floor surface from the intermediate portion downward. A vertical surface 11B is formed. Magazine loading units 124 and 126 are attached inside the inclined surface 11A and the vertical surface 11B, respectively.

The magazine loading units 124 and 126 are both substantially box-shaped and have the same shape. The surfaces of the magazine loading units 124 and 126 on the side plate 11 side are opened almost all over, and correspondingly, the inclined surface 11A and the vertical surface 11B are also opened. Slope 11
Opening / closing lids 120 and 122 are attached to these openings, respectively.

Below each of the magazine loading units 124 and 126, the magazine 10 in which the photosensitive material 14 is stored is placed.
2 are housed. In these magazines 102, the photosensitive material 14 used in the plate inspection device 10 is rolled and stored, and as shown in FIG.
The box shape is long along the width direction of No. 4. Magazine 1
On the upper surface of 02, a drawing port for drawing the photosensitive material 14 from inside is formed along the width direction.

Hereinafter, the magazine loading units 124 and 12
Since 6 has a similar internal structure, the inside of the magazine loading unit 124 will be mainly described (note that the reference numerals corresponding to the film loading unit 126 are shown in parentheses). Photosensitive material 1 bent in an arc shape and pulled out from magazine 102
The conveyance path 4 is turned at a right angle and directed to the inside of the plate inspection making apparatus 10. At the position corresponding to the vertical surface of the insertion guide 134, a trailing edge detection sensor 72 that detects an end mark provided in advance on the photosensitive material 14 is provided. That is, a hole (not shown) is provided in the vicinity of the rear end of the photosensitive material 14 wound in layers, and the light projecting section and the light receiving section of the rear end detection sensor 72 are sandwiched so as to sandwich the passage trajectory of the hole. Is provided. Therefore, normally, the light from the light projecting portion is blocked by the photosensitive material 14, and the light from the light projecting portion is received by the light receiving portion by passing through the optical axis of the light projecting portion by the hole, and the light is sensed. It can be recognized that the rear end of the material 14 is approaching.

A lower roller pair 136 (upper roller pair 137) is provided at the bent portion of the insertion guide 134. A roller below the lower roller pair 136 (upper roller pair 137) is a driving roller 138 (139).

The roller above the lower roller pair 136 (upper roller pair 137) is the pressing roller 140 (14
The photosensitive material 14 is nipped by applying a nip force to the driving roller 138 (139).
Receives the carrying force.

The cutter 116 is provided near the tip of the insertion guide 134 on the side opposite to the magazine 102. After the photosensitive material 14 is cut in the width direction, the insertion port 15 is inserted.
4, guided by the guide 156 and the guide 160 (162), and transported to the transport unit 166.

A guide 176 for guiding the photosensitive material conveyed from the magazine loading units 124 and 126 is arranged in the conveying unit 166, and the roller pair 17 is provided.
The photosensitive material 14 conveyed from the guides 160 and 162 by the rollers 2 and 174 have the same conveyance path after the guide 176.

Photosensitive material leading edge detection sensors 182 and 184 are arranged near the roller pairs 172 and 174, and the leading edge of the photosensitive material 14 pulled out from the magazine loading units 124 and 126 can be detected. Also, guide 1
A motor 188 for rotating and driving the drive roller 138 (139) is disposed in the vicinity of 76. A pulse encoder 74 is attached to the motor 188, and the transport length of the photosensitive material 14 can be calculated by counting the number of pulses. In this embodiment, the number of pulses after the leading edge of the photosensitive material 14 is detected by the photosensitive material leading edge detection sensors 182 and 184 is counted.

Here, in FIG. 4, the rear end detection sensor 7
2, cutter 116, photosensitive material tip detection sensor 182 (1
84) schematically shows the arrangement relationship of the rear end detection sensor 7
The conveyance length L from 2 to the cutter 116 and the conveyance length M from the cutter 116 to the photosensitive material tip detection sensor 182 (184) are constant. Therefore, when the amount of the photosensitive material 14 remaining in the magazine 102 is small, the trailing edge detection sensor 72 detects the leading edge of the photosensitive material 14 by the photosensitive material leading edge detection sensor 182 (184) and then detects the vicinity of the trailing edge of the photosensitive material 14 ( By adding the transport lengths L and M to the length calculated based on the number of pulses counted until the hole is detected (hereinafter referred to as the calculation length C), the film is pulled out from the magazine 102 when the trailing edge of the film is detected. Photosensitive material 1
The length of 4 (hereinafter referred to as the withdrawal length A) can be obtained.

On the other hand, the photosensitive material 14 applied to the next exposure
Transport length according to the size of (the designated length S below)
Is set before the conveyance is started, and it is possible to determine whether or not the designated length S can be secured based on the length A of the drawn photosensitive material 14.

Here, when the trailing edge detecting sensor 72 detects the vicinity of the trailing edge (hole) of the photosensitive material 14 and the leading edge of the photosensitive material 14 is not detected by the photosensitive material leading edge detecting sensor 182 (184), It is determined that the next exposure is impossible, the exposure is stopped, and the magazine 102 is instructed to be replaced.

In this case, the drive motor 188 may be immediately stopped to instruct replacement of the magazine 102, or the replacement of the magazine 102 may be instructed after conveying the remaining photosensitive material 14 to the exposure position. The material 14 may be discharged out of the apparatus in an unexposed state.

On the other hand, when the trailing edge detecting sensor 72 detects the vicinity of the trailing edge (hole) of the photosensitive material 14 and the leading edge of the photosensitive material 14 is detected by the photosensitive material leading edge detecting sensor 182 (184) ( The tip is the tip detection sensor 18
2 (if passing 184)), whether or not exposure is possible will be selected according to the designated length S designated for the next exposure.

For example, from the rear end detection sensor 72 to the cutter 1
If the transport length L up to 16 is 140 mm, the value obtained by subtracting the designated length S from the sum of the transport length M and the calculated length C is a negative value, and the absolute value of this negative value is 140 mm.
If it is less than this, it is determined that the exposure is possible, the sheet is conveyed and cut until the sum of the conveyance length M and the calculated length C reaches the designated length S, and the next one exposure is performed, and then the magazine 102 is instructed to be replaced.

If the value obtained by subtracting the designated length S from the sum of the transport length M and the calculated length C is a negative value, and the absolute value of this negative value is 140 mm or more, the shortage amount is L. It cannot be supplemented, and it can be judged that the photosensitive material length A is not the specified length S and exposure is impossible. Therefore, the rear end detection sensor 7
When it is detected in step 2, the conveyance is stopped, the photosensitive material 14 is cut and conveyed to the exposure position, and then the magazine 102 is instructed to be replaced and the photosensitive material 14 is discharged to the outside of the apparatus.

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

When the operation switch is turned on in step 200, the photosensitive material 1 is processed in step 202.
It is determined whether or not a signal (signal from a photosensitive material cut control routine described later (see FIG. 6)) indicating that the cutting of the designated length of No. 4 has been completed is input. Transition. In step 204,
Initial conveyance control of the photosensitive material is performed. That is, the photosensitive material 14 cut into a predetermined length is conveyed to the surface plate section 28 by the photosensitive material conveying section 26.

In the next step 206, the surface plate standby control is performed, and then in step 208, the 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 moved onto the surface plate unit 28.

Next, in step 210, exposure standby control is performed, and then steps 212, 214 and 21.
In 6, exposure control is performed. That is, in the case of a positive type photosensitive material, the original film 16 is changed to the Y plate, the BK plate, the M
Photosensitive material 1 by stacking BK plate on plate and BK plate on C plate respectively
4 are sequentially brought into close contact with each other, and exposure is performed through each of B, G, and R filters.

In the case of the negative type photosensitive material, the original film 16 is a Y plate, an M plate, a C plate, or a BK plate.
4 are sequentially brought into close contact with each other and exposed through B, G, R, and BK filters.

When the exposure is completed, the support base 68 is moved to the film loading section 36 and is on standby, and the step 2
From 16 to step 218, the exposed photosensitive material conveyance control is performed.

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

Next, the procedure for determining whether or not to continue the exposure of the photosensitive material in the case where the amount of the photosensitive material in the magazine 102 becomes small and the magazine 102 needs to be replaced will be described with reference to the flowchart of FIG. To do.

In step 300, flag F and flag G are set.
And reset the pulse count respectively, step 302
Then, it is determined whether or not the designated length S has been input by shifting to.

If an affirmative decision is made in step 302, the operation proceeds to step 304 and the photosensitive material 14 is transferred from the magazine 102.
Start withdrawing.

In the next step 306, it is judged whether or not the leading edge of the photosensitive material 14 has been detected by the photosensitive material leading edge detection sensor 182 (184).
Set flag G at 8 (1), then step 310
Then, pulse counting is started and the process proceeds to step 312. Further, a negative determination is made in step 306, that is, the photosensitive material 14
If the leading edge of is not detected, skip steps 308 and 310 and proceed to step 312.

In step 312, the rear end detection sensor 72
It is determined whether or not the trailing edge of the photosensitive material 14 has been detected, and if a negative determination is made, the process proceeds to step 314. If the leading edge of the photosensitive material is not detected in step 314, a negative determination is made, and thus the process proceeds to step 306. Therefore, when neither the leading edge nor the trailing edge of the photosensitive material 14 is detected, steps 306, 312,
314 is repeated.

In step 314, if the leading edge of the photosensitive material is detected, an affirmative determination is made.
In step 316, it is determined whether or not the sheet has been conveyed by the length corresponding to the designated size. In the case of negative determination, the process proceeds to step 312, and unless a trailing edge of the photosensitive material is detected, step 312, 314 and 316 are repeated. On the other hand, if it is determined in step 316 that the designated length has been conveyed, the process proceeds to step 318, the conveyance is stopped, the cutting is performed by the cutter 116 in step 320, and then the specified length is cut in step 322. Is output (corresponding to step 202 in FIG. 5),
Control goes to step 324. In this step 324,
It is determined whether the flag F is set (1),
If the judgment is negative, the process returns. The flag F is a flag that is set or reset depending on whether or not the magazine 102 needs to be replaced, and will be described later.

Here, in step 312, when the trailing edge of the photosensitive material is detected before reaching the designated length, conventionally, the magazine 102 is immediately instructed to be replaced at this point and the conveyance is stopped. However, in this embodiment, the magazine replacement timing is changed based on the length of the photosensitive material 14 from the magazine 102 when the trailing edge of the photosensitive material is detected.

That is, if an affirmative decision is made in step 312, then the routine proceeds to step 326, where a flag G is set, that is, whether the leading edge of the photosensitive material has passed the photosensitive material leading edge detection sensor 182 (184). It is determined whether or not, and in the case of a negative determination, it is determined that the pull-out length A of the photosensitive material is equal to or less than the designated length S, the process proceeds to step 328, and only the transportation of the photosensitive material 14 is executed. For this reason,
All of the photosensitive material 14 is pulled out from the magazine 102 and discharged without exposure. In the next step 330, it is indicated that the magazine 102 needs to be replaced. When processing is performed in such a route (route indicated by arrow X in FIG. 6), the photosensitive material 14 drawn from the magazine 102 is processed.
Since the length does not reach the specified length, the next exposure is not performed, and the instruction for magazine replacement is notified to the operator by a notification means, for example, a display, an alarm or the like.

At the next step 332, the magazine 102 is replaced by the operator, and it is judged whether the replacement is completed or not, for example, by operating the key indicating the end of replacement, and if the determination is affirmative, the process returns. .

Next, in step 326, if an affirmative determination is made, that is, if the leading edge of the photosensitive material 14 has passed through the photosensitive material leading edge detection sensor 182 (184) when the trailing edge of the photosensitive material is detected, step 326 is performed. To step 334.

In step 334, the length C of the photosensitive material 14 that has passed through the photosensitive material leading edge detection sensor 182 (184).
Is calculated from the pulse count value, and the process proceeds to step 336.

At step 336, the sum of the transport length M and the calculated length C is compared with the designated length S to judge whether the absolute value of M + C-S is less than or equal to the transport length L, and | M + C-S | < When it is determined to be L, it is determined that the length that can be processed once more has been drawn out, the process proceeds to step 338, the flag F is set, and then the process proceeds to step 340 to transport to the designated length. To do. In the next step 342, the photosensitive material 14 is cut at the time when the photosensitive material 14 is conveyed to the designated length, and the process proceeds to step 322 described above. If such a route (route shown by arrow Y in FIG. 6) reaches step 322,
Since an affirmative decision is made in step 324, an instruction to replace the magazine is given after cutting for one exposure.

On the other hand, in step 336, | M + C−S | ≧
If it is determined to be L, it is determined that the pull-out length A has not reached the designated length S, the process proceeds to step 346, the photosensitive material 14 is cut, and the conveyance / discharge process is performed in step 328, and then the step Move to 330. In such a route (route indicated by arrow Z in FIG. 6), the length is not long enough for the next processing, and therefore, the photosensitive material 14 is immediately cut, conveyed and discharged without exposure, and the magazine 102 is discharged.
Instruct to replace.

As described above, in this embodiment, the photosensitive material 14 is used.
Depending on the length of the photosensitive material withdrawn from the magazine 102 at the time when the trailing edge is detected, whether or not one more exposure is possible, or if the exposure is not possible, after all the withdrawn photosensitive material is conveyed and discharged. Since it is determined whether to replace the magazine or cut at that time (at the time when the trailing edge of the photosensitive material is detected) and replace the magazine with the photosensitive material 14 slightly pulled out,
The damage of the photosensitive material 14 that has been pulled out due to the replacement of the magazine 102 can be reduced, and even if the damage occurs, the position of the fragment can be limited (before the sensor for detecting the edge of the photosensitive material). Work becomes easy. Also,
If one more exposure is possible based on the specified length, the exposure can be continued only once,
It is possible to prevent wasteful disposal of the photosensitive material 14.

[0069]

As described above, the method and apparatus for conveying the photosensitive material according to the present invention determines the disposal of the photosensitive material according to the length of the photosensitive material drawn out at the time of exchanging the magazine, and the remaining photosensitive material remains. Has the excellent effect that the magazine can be smoothly removed with the minimum length.

[Brief description of drawings]

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

FIG. 2 is an enlarged view of a magazine loading unit.

FIG. 3 is a perspective view of a plate inspection making apparatus.

FIG. 4 is a schematic diagram showing a transport path length of a photosensitive material drawn from a magazine (lower side).

FIG. 5 is a control flowchart showing the flow of the entire apparatus.

FIG. 6 is a flowchart of a photosensitive material conveyance control when the magazine is replaced.

[Explanation of symbols]

 10 Plate Making Apparatus 14 Photosensitive Material 72 Rear Edge Detection Sensor 74 Pulse Encoder 100 Magazine Loading Section 102 Magazine 116 Cutter 182, 184 Photosensitive Material Tip Detection Sensor 188 Motor

Front page continuation (72) Inventor Hideaki Okubo 1250 Takematsu, Minamiashigara City, Kanagawa Prefecture Fuji Kikai Kogyo Co., Ltd.

Claims (4)

[Claims] 1. A photosensitive material transport method for pulling out a long photosensitive material stored in a magazine, cutting it according to a designated size, transporting it to an exposure position, and exposing it. When the vicinity of the trailing edge of the exposed photosensitive material is detected, whether to continue exposure is selected based on the specified size and the remaining usable length of the photosensitive material. If the exposure is performed, the magazine is replaced after the exposure is performed once, and if the stop of the exposure is selected, the magazine is replaced in the unexposed state. 2. The method of transporting a photosensitive material according to claim 1, further comprising exchanging the magazine after cutting the drawn photosensitive material, when the stop of the exposure is selected. 3. The photosensitive material conveying method according to claim 1, wherein the magazine is replaced together with the pulled-out photosensitive material when the stop of the exposure is selected. 4. A photosensitive material transporting device for pulling out a long photosensitive material stored in a magazine, cutting it according to a specified size, transporting it to an exposure position, and exposing it. A trailing edge mark detection sensor for detecting a trailing edge mark provided in advance on the photosensitive material at a position immediately after the cutting, and a cutter disposed downstream from the trailing edge mark detection sensor for a predetermined length to cut the photosensitive material. , A photosensitive material front edge detection sensor which is disposed on the downstream side by a predetermined length from the cutter and detects the presence or absence of the photosensitive material, and a conveyance after the front edge of the photosensitive material is detected by the photosensitive material front edge detection sensor 1. A photosensitive material transporting apparatus comprising: a transporting length measuring means for measuring a length; and a control means for instructing any one of the following (a), (b) and (c) by a notifying means. (A) When the trailing edge mark detection sensor detects the trailing edge mark provided on the photosensitive material, and the photosensitive material leading edge detection sensor does not detect the photosensitive material,
The magazine is instructed to be replaced after each of the drawn photosensitive materials or all of the remaining photosensitive materials are drawn and conveyed to the exposure position. (B) When the trailing edge mark detecting sensor detects the trailing edge mark provided on the photosensitive material, the photosensitive material leading edge detecting sensor detects the photosensitive material, and the trailing edge detecting sensor detects the photosensitive material. If the length up to the tip of is longer than the length corresponding to the designated size, the photosensitive material is cut at the designated length, exposed once, and then the magazine is instructed to be replaced. (C) When the trailing edge mark detection sensor detects the trailing edge mark provided on the photosensitive material, the leading edge detection sensor detects the photosensitive material, and the trailing edge detection sensor detects the leading edge of the photosensitive material. If the length is shorter than the length corresponding to the specified size, the photosensitive material is cut at the time when the trailing edge of the photosensitive material is detected, the photosensitive material is conveyed to the exposure position, and then the magazine is instructed to be replaced.