JPH03191337A - Scanning exposing type camera - Google Patents

Abstract

PURPOSE:To easily set an original while looking at displayed data on a position by operating data based on the width of a gripper margin, on the position for an original in an original holder to display the data, and drawing position displaying lines, which indicate the positions of originals, on a positioning sheet. CONSTITUTION:A center line CL, a left reference line LL, and the position displaying lines DL which show distances from the center line CL to both sides are drawn on the positioning sheet 23. Data D1 on the position where an original is to be set is fed from an original setting position calculating part 73a, via a photographing control part 73d and an input/output interface 72, to a data display part 71b, and is displayed here. An operator reads the displayed data D1 on the position where the original is set, and sets the original OR onto an original platen 21. At this time, the left end of the original OR is aligned on the left reference line. Thus, the operator can easily set the original while looking at the displayed data on the position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scanning exposure type camera for creating a printing plate or the like by exposing an original image onto a sensitive material such as a master vapor.

[Conventional technology]

2. Description of the Related Art As a copying camera for directly producing a printing plate from a manuscript, there is known an apparatus disclosed in Japanese Patent Application No. 15668/1983 filed by the applicant of the present application. The projection optical system of this camera is equipped with a slit, and copies are made by projecting a slit-shaped image of the original onto the sensitive material while moving the original and the sensitive material in synchronization. ,
It is called a "scanning exposure camera." ).

As is generally well known, there are two ways to hang a printing plate on a printing press: horizontal loading and vertical loading.

Horizontal printing plates and vertical printing plates differ in the way they provide gripping allowance to secure them to the printing press's cylinder.

Therefore, when a printing plate is created using a copying camera, it is necessary to adjust the position of the original in the original holder to the optimum position corresponding to the method.

[Problem to be solved by the invention]

In the past, the optimal position of the original to be placed in the original holder of a copying camera had to be determined by finding the optimal position each time the original was replaced, as the printing plate moved vertically and horizontally over a fairly wide range depending on the copying method and copying magnification. There was a problem in that the task of moving the manuscript was complicated.

[Purpose of the invention]

This invention was made in order to solve the above-mentioned problems in the prior art, and the printing plate can easily position the original in the original holder according to the method and copying magnification. An object of the present invention is to obtain a scanning exposure type camera capable of copying an image of a document at a desired position.

[Means to solve the problem]

In order to solve the above-mentioned problems, in a first configuration of the present invention, an original and a sheet-like sensitive material are transported synchronously, and an image of the original is copied onto the sheet-like sensitive material to form a printing plate. A scanning exposure type camera for producing an image, comprising: (a) a document holder that holds the document and transports the document in a predetermined document transport direction; and (b) a document holder that holds the document and transports the document in a predetermined document transport direction; a photosensitive material transfer means for transferring the photosensitive material to (
c) a projection optical system that projects an image of the original onto the sheet-like sensitive material; (d) a width of the sheet-like sensitive material in a direction perpendicular to the direction of transport of the sensitive material; and a sheet-like texture on the printing plate. input means for inputting the width of the gripping allowance to be provided at the end of the width of the material and the copying magnification of the image;
) the width of the sheet-like sensitive material and the width of the gripping allowance;
(f
) data display means for displaying the position data, and the document holder includes a transparent document table on which the document is placed, and a transparent document table that allows the document placed on the document table to be seen through. a positioning sheet for covering, and the positioning sheet has a plurality of position indicators drawn in a direction parallel to the document transport direction to indicate the position of the document in a direction perpendicular to the document transport direction. and a reference line drawn in a direction perpendicular to the document transport direction to indicate the position of the edge of the document in the document transport direction.

Further, in the second configuration of the present invention, a scanning exposure type in which a printing plate is created by copying an image of the original onto the sheet-like sensitive material by transporting the original and the sheet-like sensitive material synchronously. The camera includes: (a) a document holder that holds the document and transports the document in a predetermined document transport direction; and (b) a photosensitive material transporter that transports the sheet-like photosensitive material in a predetermined photosensitive material transport direction. (c) a projection optical system for projecting an image of the document onto the sheet-like sensitive material; (d)
an input means for inputting the width of a gripping allowance to be provided at the leading edge of the printing plate in the direction of conveying the photosensitive material;
e) a transport length calculation means for calculating the transport length of the sheet-like sensitive material to be transported before copying the image onto the sheet-like sensitive material, based on the width of the gripper; The apparatus further includes a photographing control means for controlling the document holder and the light-sensitive material transporting means to be transported in synchronization with each other after the sheet-like light-sensitive material is transported by the transport length before copying an image. , the document holder includes a transparent document table for placing the document, and a positioning sheet for transparently covering the document placed on the document table, and the positioning sheet is a line drawn in the original transport direction and is drawn at a position corresponding to the center of the width of the sheet-like sensitive material, and a line drawn parallel to and on both sides of the center reference line. a plurality of lines arranged at an equal distance on both sides from the center reference line, and a position indicating line perpendicular to the document transport direction to indicate the position of the end of the document in the document transport direction. It has an end reference line drawn in a direction.

[Effect]

In the first configuration, position data indicating the position of the document in the document holder is calculated and displayed based on the width of the gripping allowance to be provided at the end of the sheet-like photosensitive material in the width direction, and positioning sheet of the document holder is also calculated and displayed. Since a position indicating line indicating the position of the document is drawn on the screen, the operator can easily set the document while viewing the displayed position data.

Further, in the second configuration, an edge reference line indicating the position of the edge of the document is drawn on the positioning sheet of the document holder,
If the original is set on this end reference line, the operator can easily set the original in the original holder since a gripping allowance is provided at the leading end of the sheet-like sensitive material in the transport direction.

〔Example〕

FIG. 1 is a sectional side view of a main part of a slit exposure type copying camera to which an embodiment of the present invention is applied.

This copying camera includes an outer box 1, a document holder 2 provided on the outer box 1 so as to be horizontally movable, a photosensitive material transport device 3 for transporting a sheet-like photosensitive material PM to an exposure position, and an interior of the document holder 2. a projection optical system 4 that irradiates light onto a document held by the document and projects the light reflected by the document onto a photosensitive material PM; and a development processing device 5 that develops and stabilizes the exposed photosensitive material PM.
It is equipped with

The document holder 2 is a document table 2 made of a transparent glass plate.
1 and a document cover 22, and the document is placed on the document table 2.
1 and the document cover 22 and are held together by pressure. This document holder 2 is driven horizontally (in the left-right direction in the figure) by a motor 23 provided in the outer box 1.

The photosensitive material conveying device 3 includes first and second photosensitive material rolls 31 and 32.
The sheet-like photosensitive material PM is sent out from either one as required. First, in the illustrated example, the photosensitive material PM is transferred from the first photosensitive material roll 31 to three roller pairs 33 to 35.
They are transported sequentially by The exposure position is set between two roller pairs 34,35. A cutting device 36 for appropriately cutting the photosensitive material PM is provided on the back side of the photosensitive material PM at the exposure position. Note that when using the photosensitive material of the second photosensitive material roll 32, three pairs of rollers 37 are used.
．． 34 and 35, the photosensitive material PM is sequentially conveyed. The structure and operation of the photosensitive material conveying device 3 will be described in detail later.

The projection optical system 4 includes a main light source 41 for irradiating light onto the original held in the original holder 2, and a projection light LB from the original.
mirrors 42 to 44 that reflect light, a projection lens 45 that forms an image of the original onto the photosensitive material PM, and a slit 46 that limits the width of the light LB projected onto the photosensitive material PM.

Further, an auxiliary light source 47 is provided below the pair of rollers 35 for exposing peripheral portions (outside effective areas) of the photosensitive material PM that cannot be exposed with the projection light LB from the original document.

This copying camera is capable of changing the projection magnification by adjusting the projection optical system 4. The mirrors 43° and 44 are fixed to the same support plate 44a, and this support plate 44a is
It is driven by a motor (not shown) and slides on the slide table 48. Further, the support base 45a of the projection lens 45 is also driven by a motor (not shown) and slides on the slide base 48. By moving the mirrors 43, 44 and the projection lens 45 in parallel in this manner, the projection magnification can be changed.

When copying, first, a document is set in the document holder 2, and then the document is irradiated with the main light source 41 while the document holder 2 and the photosensitive material PM are interlocked. That is, the document holder 2 is moved to the left in the figure, and the photosensitive material PM is moved to the roller pair 33.
Send it downward at ~35. The projection light LB from the original is sequentially reflected by mirrors 42 to 44, passes through a projection lens 45 and a slit 46, and then is focused onto the photosensitive material PM. Since the photosensitive material PM is also conveyed at the same time as the document holder 2 moves, slit-shaped images of the document are sequentially projected onto the photosensitive material PM. When the exposure is completed, the photosensitive material PM is cut by the cutting device 36 and sent to the development processing device 5.

The exposed photosensitive material PM sent to the development processing device 5 is sequentially sent by a plurality of rollers, and undergoes development, fixing, and drying processes through a path shown by a two-dot chain line in the figure. That is, the photosensitive material PM first passes through a developing tank 51 containing a developing solution, and then passes through a fixing tank 52 containing a fixing solution. Then, after passing through a drying section equipped with a drying heater 53 and a fan 54, it is carried out onto a tray 6 provided outside the outer box 1. The developed, fixed, and dried photosensitive material PM becomes a printing plate for offset printing.

FIG. 2 is a schematic side view showing an enlarged part of the photosensitive material conveying device 3. As shown in FIG.

A one-way clutch (not shown) is attached to the drive roller 34a of the roller pair 34, and a one-way clutch (not shown) is attached to the drive roller 34a of the roller pair 34.
An electromagnetic clutch (not shown) is pivotally attached to the drive roller 35a. Initially, when the leading end of the photosensitive material PM is caught between the roller pair 34, the photosensitive material PM is sent downward by the roller pair 34.

Then, when the leading end of the photosensitive material PM is caught between the pair of rollers 35, the photosensitive material PM is sent out by the pair of rollers 35. The roller pair 35 sends out the photosensitive material PM at a faster transfer speed than the roller pair 34. When the photosensitive material PM is sent out by the roller pair 35, the one-way clutch of the roller pair 34, which has a slow transport speed, idles. As a result, the photosensitive material P
M is sent out at the transport speed of the roller pair 35.

At this time, even if the one-way clutch is idling, roller pair 3
Since the nip force (pinching force) of 4 is not lost, the photosensitive material P
M is conveyed under tension between two pairs of rollers 34 and 35. As a result, the sensitive material PM between the two roller pairs 34 and 35 is stretched without slack due to this tension, and the projection light LB from the original is projected onto this sensitive material PM. Note that the width of the projection light LB projected onto the photosensitive material PM is approximately equal to the width W1 of the slit 46.

When the leading end of the photosensitive material PM is sandwiched between the pair of processor rollers 55 of the development processing device 5, the photosensitive material PM is sandwiched between the pair of rollers 35.
55 and sent downward.

Since the transfer speed of the processor roller pair 55 is set lower than the transfer speed of the roller pair 35, the photosensitive material PM is slackened between the two roller pairs 35,55. When the exposure is finished and the cutting device 36 cuts the photosensitive material PM, the roller pair 35 stops, but the processor roller 55 continues to move. However, since there is slack in the photosensitive material PM between the two roller pairs 35.55, the photosensitive material PM at the cutting position is stopped until the slack is removed. Therefore, by cutting the photosensitive material PM while its slack is decreasing, the photosensitive material PM can be cut straight. Note that the position where the cutting device 36 cuts the photosensitive material PM is
It is located approximately at the center of the projection area of the projection light LB on the upper side. The cutting device 36 in FIG. 2 includes a cutter blade 36a, a blade fixing part 36b, and a blade kite 36c, and moves the cutter blade 36a along a blade guide 36c in a direction perpendicular to the plane of the drawing. Sensitive material P
It is designed to cut M.

FIG. 3 is a diagram showing the electrical configuration of the slit exposure type copying camera. In the figure, the control device for this copying camera includes a data input/display section 71, an input/output interface 72, a CPU 73, and a power control section 74.

The data input/display section 71 includes a data input section 71a and a data display #71b. The data input section 71a is composed of a numeric keypad or the like, and the operator manually enters various data, which will be described later, from the data input section 71a. Further, the data display section 71b displays data such as the position where the document should be set on the document holder 2, and notifies the operator.

The CPU 73 includes an original set position calculation section 73a, an auxiliary light source lighting width calculation section 73b, a photosensitive material feed calculation section 73c, a photographing control section 73d, and an LED lighting data memory 73e. However, the functions of these elements 73a to 73e are realized by software provided to the CPU 73.

The power control section 74 includes an optical system control section 74a, an auxiliary light source control section 74b, and a motor control section 74c.

Note that the functions of each component of the copy camera will be further described later.

B. Preparation of a printing plate for horizontal loading FIG. 4A is a plan view showing a printing plate AP1 for horizontal loading created with this copying camera. This printing plate A P i has a width and is cut into lengths. Further, this printing plate has an effective photographing area RM including the image processing, and a leading edge non-effective area RN and a trailing edge non-effective area RN2 at both ends thereof. As shown in the figure, the direction in which this printing plate AP is transported as a photosensitive material inside the copying camera is the length direction, and the length of the effective photographing area RM along this transport direction is (hereinafter referred to as "imaging length"), the lengths of C1 and RN2 are A and A2, respectively.

■ In such a horizontal printing plate AP, the effective photographing area R
It is common to place M at the center of the length. Therefore,
The effective outer lengths A1A2 of the leading end and the trailing end are equal to each other. Furthermore, a gripping allowance of a predetermined length B1 is provided on one side of the width of the printing plate AP1, so that even if the printing plate is set in the clip device of the plate cylinder of the printing press, the image I will not be attached to the clip device. I try not to get it.

In addition, the effective imaging area RM and the non-effective areas RN and R at both ends
There is a region with a length half the slit width Wl between each of the slits and N2, which will be described later.

When creating a printing plate AP as shown in FIG. 4A, the operator inputs the following data into the data input section 71a.

■ Copying magnification M of image I ■ Sensitive material width D ■ Gripping length B1 ■ Sensitive material feeding length L ■ Imaging length C of effective imaging area RM ■ Total imaging length TC-C Also, if the printing plate to be created is horizontal At the same time, specify that the book is for use.

The original setting position calculating section 73a in the CPU 73 calculates the original setting position data D1 based on the copying magnification M, the width of the photosensitive material, and the gripping length B. Original set position data D1
is data indicating the set position of the original on the original platen 21.

FIG. 5 is a plan view showing the set position of the original OR on the original table 21. FIG. The original OR is placed with the original surface facing downward on an original table 21 made of a transparent glass plate. The document table 21 has a semi-transparent (or transparent)
One end of the positioning sheet 23 that allows the document to be seen through is fixed, and the operator can move the document OR to the positioning sheet 23.
Make sure to cover it with The positioning sheet 23 has a center line C.
L, a left reference line LL, and position display lines DL indicating distances from the center line CL to both sides are drawn.

Although only a part of the position display line DL is shown in FIG. 5 for convenience of illustration, the position display line DL is actually drawn over the entire surface of the positioning sheet 23. In addition, holes H are made here and there in the positioning sheet 23,
The operator can adjust the position of the original OR by moving the original OR at the position of this hole H with his/her finger.

FIG. 5 shows the state before the start of the copying operation, and the left reference line LL is located on the right side of the exposure section EP of the outer case 1 of the copying camera. This exposure part EP is the main light source 41 shown in FIG.
This is the part where the mirror 42 and mirror 42 are present. When copying,
Exposure is performed while the document table 21 moves to the left in FIG.

The document set position data D1 indicates the distance between the center line CL and the lower end of the document OR, and is calculated by the following equation.

DI-(D/2-B)/M...(1)■ The original set position data D1 is calculated by the original set position calculation section 7.
3a to the shooting control unit 73d and the input/output interface 7
2 to the data display section 71b, where it is displayed. The operator reads the displayed document setting position data D1 and sets the document OR on the document table 21. At this time, the left end of the document OR is aligned with the left reference line LL.

The auxiliary light source lighting width calculating section 73b determines the lighting width of the auxiliary light source 47 based on the copy magnification M and the lighting data given from the lighting data memory 73e.

The auxiliary light source 47 includes a large number of LEs in the width direction of the photosensitive material PM.
It has a configuration in which D are arranged linearly.

The auxiliary light source lighting width calculation unit 73b determines how many LEDs necessary to expose the non-effective area RN are to be lit from outside the auxiliary light source 47.

The photosensitive material feed calculation unit 73c calculates the copying magnification M and the gripping length B1.
, photosensitive material feeding length L, photographing length C, and torque photographing length TC
Based on this, the length to send the photosensitive material PM by the roller pair 34 and 35 is determined. In the example of FIG. 4A, the effective outer length of the tip part A1
and the rear effective outer length A. The effective outer length A1 of the leading edge is determined by measuring the length of the photosensitive material PM before starting the document holder 2.
This is the length that should be sent first. After the photosensitive material PM is first fed by the length At, the original holder 2 is started and exposed, so that the image I can be copied at the position shown in FIG. 4A. In addition, for horizontal printing plates, the effective outer length of the leading edge A
Since and the rear effective outer length A2 are equal, these values can be obtained using the following equation.

A1-A2- (L-C-Wl)/2...(2)
The sensitive material feed calculation unit 73c calculates the above-mentioned effective outer lengths A1 and A2.
is calculated, and this value is given to the photographing control section 73d together with the value of the photographing length C.

The photographing control section 73d receives a photographing start signal S from the data input section 71a in addition to data 2 such as the number of lit LEDs of the auxiliary light source 47 and effective outer lengths A and A.

is given. Further, an origin signal S is sent from the original origin sensor 25 provided below the original holder 2 to the roller pair 3.
An encoder (not shown) of the drive motor 35m of No. 5 provides a pulse signal S for sending the sensitive material. Shooting control section 73
d is the power control unit 7 based on these data and signals.
The photographing of the photosensitive material is controlled by giving commands to the optical system control section 74a, the auxiliary light source control section 74b, and the sensor control section 74c, respectively, in the photosensitive material.

The optical system control unit 74a controls the on/off of the main light source 41 via the human output interface 72, and
The copy magnification of the projection optical system 4 is adjusted. The auxiliary light source control unit 74b controls the number N of auxiliary light sources 47 turned on and their on/off status via the input/output interface 72.

The motor control unit 74c controls the drive motor 23 of the document holder 2 and the roller pair 34 via the input/output interface 72.
゜35.55 respective drive motors 34m, 35m,
55m and the drive motor 36m of the cutting device 36.

FIG. 6 is a flowchart showing the procedure for creating a printing plate.

First, in step S1, the operator uses the data manual H71
, a, input the required data. The required data are the aforementioned copying magnification M, photosensitive material width, <wafer length B, photosensitive material feeding length, photographing length C, and total photographing length TC. Also, the mode indicating whether the printing plate to be created is for horizontal printing or vertical printing is also specified at the same time. Note that at this time, the tip of the photosensitive material PM is at the cutting position by the cutting device 36. In this embodiment, the cutting position and the center position of the projection light LB are the same.

This position will be referred to as the "main exposure position" below.

Also, the exposure position by the auxiliary light source 47 is set as [auxiliary light source position].
It is called.

When creating a printing plate for horizontal loading, the document setting position data D1 is calculated according to the above equation (1) and displayed on the data display section 71b. The operator uses this data D1
is read, and the original OR is set in the position shown in FIG. 5 in step s2.

In step S3, the operator
When the start key a is pressed, the operations from step S4 onwards are started.

In step S4, the effective outer lengths A and A2 are calculated according to the above-mentioned equation (2), and feeding of the photosensitive material PM is started according to these values.

In step S5, it is determined whether the main exposure boundary line has come to the main exposure position. Here, a line separated by a length w1/2 from the left end of the effective imaging area RM in FIG. 4A (indicated by a chain line in the figure) is referred to as a imaging boundary line ML.

The effective outer length A1 of the leading end of the photosensitive material PM is extended by the roller pair 35.
When the photographing boundary line ML is moved by 1, the photographing boundary line ML comes to the main exposure position. At this time, the roller pair 35 is stopped in step s6, and the transport of the photosensitive material PM is stopped, and the main light source 41 is turned on in step S7. At this time, projection light LB having a slit width W1 is projected onto the photosensitive material PM with the imaging boundary line ML as the center.

With this projection light LB, as shown in FIG.
, /2 area is exposed.

Note that the transport length of the photosensitive material PM is determined by the roller pair 3 shown in FIG.
A sensitive material feeding pulse signal S is generated by an encoder (not shown) provided on the motor 35m of No. 5.

The photographing control unit 73d calculates based on the following.

The determination in step S11516 below is also made based on the feed length of the roller pair 35.

Next, in step S8, the document holder 2 begins to move to the left from the standby position shown in FIG. In step S9, when the origin sensor 25 detects that the predetermined original origin in the original holder 2 has passed, in step S10 the photosensitive material PM
start sending. At this time, the left reference line L of the original OR
The projection light LB at the position L (see FIG. 5) is projected onto the main exposure position on the photosensitive material PM. In this way, by sending the photosensitive material PM and the original OR in synchronization, an image is printed on the photosensitive material PM! is being exposed.

In step Sll, when the photosensitive material PM is fed from the main exposure position by the cumulative shooting length C from step S4, the feeding of the document holder 2 is stopped in step S12, and the document holder 2 is further moved to its standby position. be returned.

When a plurality of images are photographed on one printing plate, feeding of the photosensitive material PM is stopped in step S14, and the feeding of the photosensitive material PM is stopped in step S1.
In step S5, the projection optical system is adjusted so as to change the copying magnification M to the value of the next image, and the processes from step S7 onwards are repeated again.

Since only one image I is captured using the printing plate API shown in FIG. 4A, the process moves from step S13 to step S16.

In step S16, the photosensitive material PM continues to be fed until the total feeding length from the state in step S4 becomes equal to the feeding length input in step S1.

When the photosensitive material PM has been fed by the feed length, step 517
The feeding of the photosensitive material PM is stopped. And step 31
At 8, the photosensitive material PM is cut by the cutting device 36. Thereafter, the cut photosensitive material PM is sent to the development processing device 5, where it is processed to produce a printing plate AP as shown in FIG. 4A.
is completed.

In addition, in the explanation of the above procedure, the operation of auxiliary exposure by the auxiliary light source 47 was omitted, but the auxiliary light source 47 exposes each of the effective outer regions RN and RN2 by lighting all the LEDs. It is controlled by the photographing control section 73d to do so. Copying cameras that create printing plates directly from originals usually use negative type photosensitive materials, so as mentioned above, the effective outer areas RN, R
By exposing to N2, it is possible to prevent ink from getting on the non-effective area during printing.

FIG. 4B shows images 1, 1 . FIG. 3 is a plan view showing a horizontal printing plate AP2 having two effective photographing areas RE, RE, respectively. When creating such a printing plate AP2, the operator inputs in the data manual section 71a one width of the feed length of the photosensitive material, <the feed length B1, and two effective photographing areas RE.

RE shooting length C, C, and total shooting length b
a TC-C0C and ab of the two images 1.1b
a. Input the copy magnification M, M. In the case of Fig. 4B, unlike the case of Fig. 4A, the effective imaging length C is calculated by adding 1/2 of the width W1/2 before and after the length of each of the effective imaging areas RM and RMb in the transport direction. ,C,. (On the contrary, the shooting length C
, C, may be defined as effective imaging regions RM and RMb, respectively. If defined like this, the effective outer length A,
A2 can be calculated using the following equation instead of equation (2).

A-A-(L-TC)/2...(3
)2 Note that also in the case of FIG. 4A, the imaging length (or effective imaging area) may be defined in the same manner as in FIG. 4B.

The printing plate AP2 shown in FIG. 4B is also created according to the flowchart shown in FIG. 6 described above. In addition, two images 1, 1
If images b are copied from the same original and their copy magnifications are the same, there is no need to move the original OR within the original holder 2 when photographing the second image I. Therefore, after initially setting the original OR in the original holder 2, the copying camera can automatically copy the two images 1 and 1b onto the photosensitive material. In this way, when copying multiple images from one original onto photosensitive material by automatically arranging them on multiple sides (hereinafter referred to as "automatic copying mode"),
The operator may designate the automatic copy mode to the data manual section 71a.

FIG. 4C is a plan view showing a horizontal printing plate A P s having three effective photographing areas RE-RE3 including images I to (3), respectively. This printing version A
When creating P3, the operator inputs the photographing lengths 01 to 3 C of the three effective photographing areas RM -RM in addition to the feeding length of the photosensitive material -L, the width, and the cutting length B1. Input the total photographing length TC-C+C2+CI3 and the copying magnifications M1-M33 of the three images 1-3.

Image of Figure 4C! The copying magnifications M and M3 of -1 are set to different values. Each of the images (1) to (13) is arranged so as to be in contact with the upper end of the gripper. In this way, each surface image 1 ””'
To place I s, the second and third effective imaging areas R
If the operator moves the original OR within the original holder 2 according to equation (1) before starting to photograph M and RM3 (from step S14 to step S7 in FIG. 6). good.

Incidentally, non-effective regions RN which are not exposed by the projection light LB from the main light source 41 are formed at both ends of the effective photographing regions RM and RM3 in the width direction (vertical direction in the figure) in FIG. 4C. These non-effective areas RN are covered by the auxiliary light source 47.
The light is exposed by lighting up the required number of LEDs from both ends. Since the width of such non-effective area RN depends only on the copying magnification M, the auxiliary light source lighting width calculating section 73b calculates the lighting width in accordance with the copying magnification M.

As mentioned above, when creating a horizontal printing plate, place the left end of the original OR (original holder 2) in the original holder 2.
It is only necessary to always align the position of the tip (in the direction of movement) with the left reference line LL. Also, the vertical direction of the original OR (original holder 2
The position in the direction perpendicular to the direction of movement of the document can be calculated using equation (1) and adjusted to the displayed document set position. Therefore, even when resetting the original, it only needs to be moved in the vertical direction, so there is an advantage that the original can be set easily.

Creation of C1 printing plate for vertical loading FIG. 7A is a plan view showing the printing plate CP1 for vertical loading. In printing plates for vertical loading, image I is usually placed in the center of the width. Furthermore, a gripping allowance of a predetermined length B2 is provided at the leading end in the length direction of the printing plate CP1.

When creating this print version CP1, the operator also inputs the following data into the data input section 71a.

■ Copying magnification M of image I ■ Gripping length B2 ■ Sensitive material feed length ■ Photographing length C of effective photographing area RM Also, it is specified at the same time that the printing plate to be created is a vertical cut.

The effective outer length A1 of the tip part is given by the following equation instead of equation (2).

A1-B2-W1/2...(4) Figure 8 shows the original O when creating the vertical printing plate CP1.
It is a top view which shows the set position of R.

In the vertical printing plate CP1, the image I is placed at the center of the width as described above, so the upper and lower ends of the original OR are set to be equidistant DI-D2 from the center reference line CL. . Further, the left end of the original OR is aligned with the left reference line LL.

The procedure for creating a printing plate for vertical loading is the same as the procedure for creating a printing plate for horizontal loading shown in FIG.

FIG. 7A is a plan view showing a vertical printing plate AP2 having two effective photographing areas RM and RM5 containing images 1 and Ib, respectively, and FIG. 7C is a plan view showing three effective photographing areas RM1 to RM5 including images 11 to I, respectively. FIG. 3 is a plan view showing a printing plate CP3 for vertical loading having RM. These printed versions cp
, cp3, the effective outer length A1 of the tip part is also calculated using the above-mentioned equation (4).

Further, the setting position of the original OR is also the same as the position shown in FIG. The same original is OK, as shown in Figure 7B and Figure 7C.
When a plurality of images are to be printed on multiple pages, the copying camera may automatically copy the plurality of images by specifying the automatic copying mode in advance. Of course, if different originals are to be printed on multiple pages, the operator only needs to reset the originals during the process from step S14 to step S7 in FIG.

As mentioned above, when creating a printing plate for vertical loading, the left edge of the original OR should always be aligned with the left reference line LL in the original holder 2, and the positions of the upper and lower edges of the original should be aligned with the center reference line. What is necessary is to make it equidistant from CL. Therefore, regardless of the position of the image on the printing plate or the copying magnification,
Since it is sufficient to always set the original at the above-mentioned position, there is an advantage that the original can be set easily.

〔Effect of the invention〕

As explained above, in the first configuration of the present invention, position data indicating the position of the original in the original holder is calculated and displayed based on the width of the gripping allowance to be provided at the end in the width direction of the sheet-like photosensitive material. Furthermore, since a position indicating line indicating the position of the original is drawn on the positioning sheet of the original holder, the operator can easily set the original while viewing the displayed position data.

Further, in the second configuration, an edge reference line indicating the position of the edge of the document is drawn on the positioning sheet of the document holder,
If the original is set on this edge reference line, a gripping allowance is provided at the leading edge of the sheet-like photosensitive material in the transport direction, so the operator can easily set the original in the original holder. be.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of a main part showing a copying camera as an embodiment of the present invention, FIG. 2 is a sectional view of a main part showing an enlarged part of a photosensitive material conveying device, and FIG. A block diagram showing the electrical configuration of the copying camera; FIGS. 4A to 4C are plan views showing a horizontal printing plate; FIGS. 5 and 8 are plan views showing a state in which a document is set in a document holder. , FIG. 6 is a flowchart showing the copying procedure in the embodiment, and FIGS. 7A to 7C are plan views showing a printing plate for vertical loading. OR...Manuscript, PM...Sensitive material, 2...
・Document holder, 21...Document stand, 23...
Positioning sheet, LL...left reference line, CL...
Center reference line, DL... Position display line, 3... Sensitive material transport device, 4... Projection optical system, 71 a...
-Data input section, 71d...Data display section, 73...CPU. 73c...Sensitive material feed calculation section, 73d...Photographing control section 7A, Figure B, Figure A

Claims (2)

[Claims] (1) A scanning exposure camera that creates a printing plate by copying an image of the original onto the sheet-like sensitive material by transporting the original and the sheet-like sensitive material in synchronization, (a) a document holder that holds the document and transfers the document in a predetermined document transfer direction; (b) a photosensitive material transfer means that transfers the sheet-like photosensitive material in a predetermined photosensitive material transfer direction; and (c) the document (d) a width of the sheet-like sensitive material in a direction perpendicular to the direction in which the sheet-like sensitive material is transported, and an end portion of the width of the sheet-like sensitive material; an input means for inputting the width of the gripping allowance to be provided and the copying magnification of the image; (e) the width of the sheet-like sensitive material and the width of the gripping allowance;
(f) document position calculation means for calculating, based on the copy magnification, position data for indicating the position of the document in the document holder in a direction perpendicular to the document transport direction; (f) displaying the position data; data display means, and the document holder includes a transparent document table for placing the document, and a positioning sheet for transparently covering the document placed on the document table. In addition to being prepared,
The positioning sheet includes a plurality of position indicating lines drawn in a direction parallel to the document transport direction to indicate the position of the document in a direction perpendicular to the document transport direction, and an edge of the document in the document transport direction. 1. A scanning exposure type camera, comprising a reference line drawn in a direction perpendicular to the document transport direction to indicate the position of the document. (2) A scanning exposure camera that creates a printing plate by copying an image of the original onto the sheet-like sensitive material by transporting the original and the sheet-like sensitive material in synchronization, the camera comprising: (a) a document holder that holds the document and transfers the document in a predetermined document transfer direction; (b) a photosensitive material transfer means that transfers the sheet-like photosensitive material in a predetermined photosensitive material transfer direction; and (c) the document (d) an input means for inputting the width of a gripping allowance to be provided at the leading end of the printing plate in the direction in which the sensitive material is transported; (e) ) a transfer length calculation means for calculating a transfer length of the sheet-like sensitive material to be transferred before copying the image onto the sheet-like photosensitive material, based on the width of the gripper; and a photographing control means for controlling the document holder and the light-sensitive material transporting means to be transported in synchronization with each other after the sheet-like photographic material is transported by the transport length before copying. The document holder includes a transparent document table for placing the document, and a positioning sheet for transparently covering the document placed on the document table. , a center reference line drawn in the document transport direction at a position corresponding to the center of the width of the sheet-like sensitive material; and a line drawn parallel to and on both sides of the center reference line. a plurality of lines for indicating positions at equal distances on both sides from the center reference line; and a plurality of lines perpendicular to the document transport direction for indicating the position of the edge of the document in the document transport direction. A scanning exposure type camera characterized by having an end reference line drawn in a direction.