JPS63254436A - Exposing device for copying machine - Google Patents

Abstract

PURPOSE:To flatly hold a photosensitive material by providing the first and the second pairs of rollers on both sides of an exposing position, and arranging a guide member for carrying horizontally the photosensitive material returned in the course of exposure, so as to match the first pair of carrying rollers. CONSTITUTION:A photosensitive material 41 which has been drawn out by a pair of drawing-out rollers 42 is inclined, and also, carried along a guide member 43 which has been shifted upward against a pair of rollers 44, nipped by the pairs of rollers and carried into a passage 48. When the tip of the photosensitive material 41 is detected by a sensor 49, a cutter 50 cuts the rear end. The cut photosensitive material 41 stops when its rear end has been detected by a sensor 51. At the time of copying, the material is carried in a state that the pairs of rollers 44, 45 have been nipped by a pair of rollers by synchronizing with a light source unit 14, carried along a horizontal guide member being in height which has matched the pair of rollers 44, and in a state that it has been held flatly, a slit exposure is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an exposure device used in a silver halide photocopying machine, and more specifically, the present invention relates to an exposure device used in a silver salt photographic copying machine, and more specifically, to The present invention relates to an apparatus that provides slit exposure.

[Prior Art] A silver salt photocopying machine copies an image of an original onto a photosensitive material, and has the advantage of being able to make high-quality copies compared to an electrophotographic copying machine. Silver halide photocopiers are classified into slit exposure type and camera type based on the exposure method, and are also classified into slit exposure type and camera type based on the exposure method.
Direct positive type.

It is classified as a reversal development type. The diffusion transfer method uses a diffusion transfer photosensitive material, the direct positive method uses direct positive paper, and the reversal development method uses a universal film.

A silver halide photocopier using a diffusion transfer photosensitive material, for example, as described in Japanese Patent Application Laid-open No. 59-204042, roll-shaped photosensitive material (negative material) is transferred from a magazine to a fixed length. The photosensitive member in the form of a sheet is pulled out and cut with a cutter, exposed to slits while held on a horizontal exposure stage, and the image receiving member (positive member) in the form of a sheet is superimposed on the exposed photosensitive member while the developer is exposed to the inside of the developer. Then, the image receiving member is subjected to a predetermined development time in a stocker, and after that, the image receiving member is subjected to g, IL, and then to a washing tank.

The structure is such that the drying chamber is sequentially radiated and discharged onto a tray.

In addition, as a camera-type copying machine, for example,
As described in Japanese Patent No. 138935, a photosensitive member in the form of a roll and an image receiving member in the form of a sheet are known.

[Problems to be solved by the invention] In the conventional copying machine described above, the photosensitive material cut into sheets is placed on the exposure stage and slit exposure or planned exposure is performed. As an exposure stage becomes necessary and the copy size increases, there is a problem in that it is difficult to hold the photosensitive material flat on the exposure stage.

[Object of the Invention] An object of the present invention is to provide an exposure device for a copying machine in which the width of the exposure stage is narrowed so that a photosensitive material can be held flat.

Means for Solving Problems] In order to achieve the above object, the present invention disposes first and second pairs of transport rollers on both sides of the exposure position where slit exposure is performed, and transfers the unexposed photosensitive material. During slit exposure, the first guide member is inclined with respect to the exposure position, and is disposed close to the first conveyance roller pair with its end vertically shifted from the first conveyance roller pair. In order to horizontally guide the returned photosensitive material, the second guide member is arranged in alignment with the first pair of conveying rollers.

[Effect]

The photosensitive material is guided along the first guide member, and the leading end of the photosensitive material hits the side surface of one of the first pair of conveying rollers and is wound up. This unexposed photosensitive material is lightly nipped by a first pair of conveyance rollers, and then conveyed toward a second pair of conveyance rollers disposed on the opposite side of the exposure position. When the leading edge of the photosensitive material is nipped by the second pair of transport rollers, 2
The photosensitive material is transported by a pair of 1Jl transport rollers. Then, when the rear end of the photosensitive material passes through the exposure position, the rotation of the two pairs of transport rollers is stopped, and the rear end of the photosensitive material is nipped by the second pair of transport rollers. During slit exposure, the two pairs of conveyance rollers rotate in reverse, so the rear end of the photosensitive material is passed around by the first pair of conveyance rollers and returned by the two pairs of conveyance rollers. The rear end of the photosensitive material coming out of the first pair of transport rollers enters a second guide member arranged horizontally and is guided along this.

Embodiments of the present invention will be described in detail below with reference to the drawings.

〔Example〕

FIG. 1 shows a silver salt photographic color copying machine embodying the present invention. A transparent document placement surface 11 is provided at the top of the device main body IO, and a color document 12 is placed with the document surface facing down on this surface, and is held down by a document holding plate 13 whose bottom surface is white. Can be attached.

The light source unit 14 includes a light source 15. It has a built-in reflector 16 and a mirror 17, and the motor 18 allows the original i3! It reciprocates in parallel with the device 11 to illuminate the color original 12 with slits. The mirror unit 19 holds two mirrors 20.degree. 21 extending in a direction perpendicular to the plane of the paper, and returns the light from the light source unit 14 in parallel. The mirror unit 19 is driven by a motor 18 via a wire (not shown) and moves at half the speed of the light source unit 14 to keep the object distance constant. During magnification conversion, the motor 22 rotates to adjust the position of the mirror unit 19. Furthermore, a sensor 23 such as a microswitch is provided in the path of the light source unit 14 in order to detect the end of scanning of the light source unit 14.

The lens unit 24 is provided between the front group 25 and the rear group 26.
A yellow filter Y, a magenta filter M, a cyan filter C, and a fixed aperture (not shown) having an aperture in the center are arranged. These color filters Y, M, C
is movable in a direction perpendicular to the optical axis, and the amount of insertion adjusts the light quality of the slit light to correct color balance. In this embodiment, color filters Y, M, and C are provided independently, but as described in Japanese Patent Publication No. 44-2542, two color filters are placed on both sides of a slideable transparent glass. It is also possible to have a structure attached to. Behind the rear group 26, two aperture plates 27 and 28 that move in opposite directions and a green absorption filter 29 are provided.

In a typical printed document, the sensitivity of the green component of the ink is 570 nm, and in the case of a photographic document, the peak of the green component of the dye is approximately 535 nm. Further, in this example, the photosensitive member used has a green component sensitivity peak of approximately 56 Qnm. Therefore, in order to finish the printing original and the photographic original under the same copying conditions, a green absorption filter 29 is used which cuts out the long wavelength side of the green component by interference. This green absorption filter 29 is withdrawn from the optical path during pre-scanning, and is completely inserted into the optical path during color copying. Note that when using a photosensitive member whose green sensitivity peak is on the short wavelength side, for example, 540 nm, the green absorption filter 29 is not necessary. When the green absorption filter 29 is further slid while being completely inserted into the optical path, the diaphragm plates 27 and 28 move in a direction closer to each other in conjunction with this, thereby adjusting the light amount of the slit light. The lens unit 2
4 is moved along the optical path by a motor 30 according to the printing magnification.

The light passing through the lens unit 24 passes through the mirror 32.3.
3 and then reaches the mirror shutter 34.

When the solenoid 35 is energized, the mirror shutter 34 rotates about the shaft 36 to retreat from the optical path of the slit light and guides the light reflected from the color original 12 to the measuring means 37 .

The magazine 40 stores a photosensitive member (negative member) 41 made of a diffusion transfer type photosensitive material in a rolled state, and the photosensitive member 41 is nipped by a pair of drawer rollers 42 and pulled out. The pull-out roller pair 42 is configured such that one of the rollers rotates vertically with slight pulsation, thereby correcting the meandering of the photosensitive member 41.

As shown in FIG. 2(A), the photosensitive member 41 pulled out by the pair of pull-out rollers 42 is guided at both ends by channel-shaped guide members 43. As shown in FIG. This guide member 43 is arranged in an inclined state, and its tip end is arranged in close proximity to the pair of conveying rollers 44a, -44b in a state shifted in the vertical direction.

These transport roller pairs 44a and 44b have a wide drum shape, and lightly press the photosensitive member 41 in order to prevent pressure blurring.

A pair of conveyance rollers 45a, 45b is arranged to face the pair of conveyance rollers 44a, 44b, and a horizontal exposure position is formed between them. An exposure stage 46 is placed at this exposure position, and a mirror shutter 3 is used for color copying.
Slit light 47 from 4 is incident. Conveying roller pair 44
a, 44b and 45a, 45b rotate together with the pair of pull-out rollers 42, lightly pump the photosensitive member 41 that has been sent, and convey it into the upwardly curved path 48. The passage 48 is a flat rectangular tube made of plastic, metal, or the like, and the photosensitive member 41 is stored in a curved manner, thereby shortening the lateral length of the apparatus main body 10. In addition,
If it is difficult to secure space above, the passage 48 may be curved downward, or may be composed of a plurality of rollers and guide members.

When the photosensitive member 41 is transported a certain length and the leading end thereof is detected by the sensor 49, the rear end is cut off by the force/meter 50. The cut photosensitive member 41 is conveyed by a pair of transport rollers 44a, 44b and 45a.

45b, and the rear end is an exposure stage 46.
The photosensitive member 4 passes through the photosensitive member 4 and is detected by the sensor 51.
1 stops.

During color copying, the transport roller pairs 44a, 44b and 45
a and 45b rotate in reverse in synchronization with the light source unit 14, and convey the photosensitive member 41 toward the rotating roller 53 while applying slit exposure to the photosensitive member 41 from the rear end side. As shown in FIG. 2(B), a horizontal guide member 54 is provided between the pair of conveying rollers 44a, 44b and the turning roller 53.
44b in close alignment with. On the other hand, since the guide members 43 are arranged close to each other on different levels, the exposed photosensitive member 41 does not get caught in the end of the guide member 43 and can fit between the guide member 43 and the guide member 54. , and are returned horizontally along the guide member 54.

A guide member 55 surrounds the outer periphery of the rotating roller 53.
are arranged, and the rollers 56 are arranged in contact with each other. The exposed photosensitive member 41 is reversely conveyed by the rotating roller 53, moves along the guide member 57, and is stopped at a position where its leading end hits the first stopper 58. After positioning the photosensitive member 41, the first stopper 58 is retracted to a position lower than the guide member 57 by the solenoid 59.

The image receiving member (positive member) 60 has a developing body 61 containing a developing solution and a bag-shaped funnel 62 that guides the developing solution flowing out from the developing body 61 attached to the tip thereof, and a plurality of sheets are stacked in a cassette 63. It is stored in. The pushing roller 64 enters into the cassette 63 when it is installed, and sends out the uppermost image receiving member 60 so that it is carried by the roller pair 65. When the sensor 67 detects this state, the feeding of the image receiving member 60 is stopped, and then the drawing out of the photosensitive member 41 is started.

After the exposed photosensitive member 41 is positioned by the first stopper 58, the extrusion roller 64. As the roller pair 65 rotates, the tip of the image receiving member 60 is inserted under the photosensitive member 41 and the second stopper 6 connected to the solenoid 69 is inserted.
Move it to the position corresponding to number 8. Note that the rollers 64 are arranged so as to sandwich the vicinity of both ends of the image receiving member 60 in order to prevent the developing body 61 from being crushed. The roller pair 65 is made of sponge rollers and has a light nip pressure between the bare rollers in order not to crush the developing pod 61 and also to serve as an internal light shield. Photosensitive member 4
1 and the image receiving member 60 have almost the same layer structure as a beer-apart type instant color film that is already commercially available.

When the image receiving member 60 is positioned by the second stopper 68, the solenoid 70 is activated to lower the searuff 2 provided at the tip of the lever 71 and join the tip of the photosensitive member 41 to the image receiving member 60. This bonding is to prevent misalignment of the photosensitive member 41 and image receiving member 60 during development processing, thereby preventing blurring of the copied image or misalignment of the copying position. In order to
It is preferable to apply hot melt (adhesive) onto the funnel 62 in advance.

After joining, the photosensitive member 41 and the image receiving member 60 are passed between a pair of developing rollers 75 and 76, and at this time, the developing body 61
is split open, and the flowing developer is spread out between the photosensitive member 41 and the image receiving member 60 to a uniform thickness. The two sheets on which this developing solution has been developed are sent to a temperature control section 78, where they are stocked at a predetermined temperature. This temperature control section 78 is composed of a stand 80 having a built-in heater 79 and a constant temperature plate 82 in which a passage 81 is formed. When the door 84 is opened after a predetermined development time has elapsed, a lever 85 interlocked with the door 84 pulls out the tip of the constant temperature plate 82 from the apparatus main body IO.

FIG. 3 shows the electrical configuration of the present invention.

The measuring means 37 includes a blue sensor 37a, a green sensor 37b, and a red sensor 37c, and measures the three color components of the printing light. Each of these sensors 3
The output signals of 7a to 37c are each amplified by an amplifier 90, converted to a digital signal by an A/D converter 91, and then converted to a concentration signal by a logarithmic converter 92. This concentration signal is written into memory 94 via controller 93. This controller 93 sequentially controls each part according to a program written in a memory 94.

The controller 93 controls the driver 9 according to the photometry result.
The motor 97 is driven via the yellow filter Y to adjust the insertion amount of the yellow filter Y into the optical path. Similarly, the magenta filter M, the cyan filter C9 aperture 27, 28, and the green absorption filter 29 are inserted into the optical path by motors 101-103 connected to drivers 98-100, respectively. Further, the motors 18, 22.30 are connected to the light source unit 14. Mirror unit 19. Each driver 104 to 106 is for driving the lens unit 24.
The rotation is controlled by a controller 93 via.

The motor 108 is connected to a driver 109, and the rotation of the motor 108 is transmitted to a pair of transport rollers 44, 45 via a clutch 110, and also to a pair of conveyor rollers 44, 45 via a clutch 110.
A pair of pull-out rollers 42. roller 56
．． They are transmitted to spreading rollers 75 and 76, respectively. A motor 115 connected to the driver 11/l drives an extrusion roller 64 and a roller pair 65.

The operation panel 118 is provided with a copy key for starting color copying, a color correction key for manually correcting color balance, a density correction key for manually correcting density, and the like. The temperature sensor 83 detects the temperature of the temperature controller 78, converts the obtained signal into a digital signal with the A/D converter 119, and then sends the signal to the controller 93.
send to

Drivers 120-125 drive the aforementioned heater 79° solenoids 35, 59, 69, and 70, respectively. The driver 126 also drives a buzzer (not shown) when a predetermined development time has elapsed.

The operation of the above embodiment will be explained with reference to FIGS. 4 to 8. A color original 12 is placed with the original surface facing down on an original placing surface 11, and an original holding plate 13 is stacked from above. Next, when the copy key on the operation panel 11B is turned on, the motors 97, 101, and 102 rotate, and the color filters Y and M are rotated.
, C to the standard position. The motor 103 also rotates to retract the green absorption filter 29 from the optical path and set the aperture plates 27 and 28 to the fully open position.

Next, the controller 93 starts pre-scanning and pushes out the image receiving member 60 from the cassette 63.

During this pre-scan, the motor 18 rotates to move the light source unit 14 and mirror unit 19 to illuminate the color original 12 with slit light. This color manuscript 12
The reflected light from mirrors 17, 20, 21 . The lens unit 24 and the mirrors 32 and 33 are sequentially rotated, and then the light enters the measuring means 37. This measuring means 37 is composed of a blue sensor 37a, a green sensor 37b, and a red sensor 37c, so that each of the three color components of the reflected light is measured. The signals output from these sensors 37a to 37c are amplified.

After being digitally converted and logarithmically converted, it is stored in the memory 94.

During the pre-scanning, the extrusion roller 64 and the roller pair 6
Since the image receiving members 5 and 5 are rotated by the motor 115, the uppermost image receiving member 60 among the plurality of image receiving members 60 accumulated in the cassette 63 is sent out. During this feeding, when the tip of the image receiving member 60 slightly comes out from the roller pair 65, the sensor 67 detects this and the controller 93 stops the rotation of the motor 115.

When the sensor 67 detects the tip of the image receiving member 60,
The controller 93 starts feeding the photosensitive member 41. Therefore, when the inside of the cassette 63 is empty,
The photosensitive member 41 is not fed. When feeding the photosensitive member 41, the pair of pull-out rollers 42 and the pair of conveying rollers 44a
, 44b, 45a, and 45b are rotated by a motor 108. The pull-out roller pair 42 pulls out the photosensitive member 41 from the magazine 40 and transports it along the guide member 43 toward the exposure position. Since the guide member 43a has different levels, the tip of the photosensitive member 41 is attached to the conveying roller 44a.
It hits the side of the machine and gets caught up in it. This rolled-up photosensitive member 41 is lightly nipped by a pair of transport rollers 44a, 44b, and is transported toward another pair of transport rollers 45a, 45b. These conveyor roller pairs 44a, 44b and 4
5a and 45b continue to rotate, so that the tip of the photosensitive member 41 enters the passage 48 and is conveyed along it.

As shown in FIG. 4, the tip of the photosensitive member 41 is connected to the sensor 4.
When detected at 9, the motor 108 is temporarily stopped, and during this stopping period, the cutter 50 is operated to cut off the rear end of the photosensitive member 41 into a sheet form. This cutter 50
When the motor 108 is activated, the motor 108 rotates again, but at this time, since the rotation of the pull-out roller pair 42 is stopped by the clutch 111, the conveyor roller pairs 44a, 44b and 4
Only 5a and 45b continue to rotate. This results in
The separated sheet-shaped photosensitive member 41 is further conveyed and moved along an upwardly curved path 48 . Then, as shown in FIG. 5, when the rear end of the photosensitive member 41 is detected by the sensor 51, the rotation of the motor 108 is stopped.

When the light source unit 14 moves a certain amount (a predetermined length of the document) and is detected by the sensor 23, the prescan ends. In this case, the light source 15 is turned off and the motor 18 starts rotating in reverse, moving the light source unit 14 and the mirror unit 19 to the left and returning them to their initial positions. At the same time, the controller 93 reads density signals for each color from the memory 94 and calculates the exposure amounts for blue, green, and red, respectively. According to this calculation result, the controller 93 drives the motors 97, 101, and 102, respectively, and adjusts the amount of insertion of the color filters Y, M, and C into the optical path to adjust the light quality. Further, the green absorption filter 29 is completely inserted into the optical path by the motor 103 to cut off the long wavelength side of the green component of the slit light. Since this green absorption filter 29 is horizontally long, if it is further slid while still in the optical path, the diaphragm plates 27 and 28 move in a direction closer to each other according to the amount of movement, thereby adjusting the light amount of the slit light. Note that the light amount and light quality can be adjusted manually by operating the color correction key and the density correction key on the operation panel 118.

After adjusting the color filter and aperture, the controller 93
While turning on the light source 15, the motor 18 is rotated to move the light source unit 14 and the mirror unit 1-19 toward the right end again, and the color original 12 is slit-scanned. At the same time, since the motor 108 rotates in reverse, the transport roller pairs 44a, 44b and 4 are connected via the clutch 110.
5a and 45b are reversely rotated to convey the photosensitive member 41 at the position shown in FIG. 5 rightward at a speed synchronized with the light source unit 14. This photosensitive member 41 is
When it is returned by a and 45b, its rear end is transferred to the transport t:l-ra pair 44a and 44b. This photosensitive member 4
1 is two pairs of rollers 44a, 44b and 45a, 45b.
Since the photosensitive member 41 is lightly nipped between the two, the photosensitive member 41 is held flat between them, and in this state is transported by a pair of transport rollers 44a, 44b and 45a, 45b of 2.tft.

Although the ends of the photosensitive member 41 are somewhat curled, the ends of the guide members 43 and 54 are arranged close to the pair of transport rollers 44a and 44b, so that the photosensitive member 41 is Before leaving the pair 44a, 44b and returning to its original state, the curl enters between the guide members 43 and 54. Therefore, the rear end of the photosensitive member 41 does not hit the end of the guide member 43, and is returned smoothly along the horizontal guide member 54. For this reason, there is no risk that the conveying roller pairs 44a, 44b and 45a, 45b will slip due to load fluctuations, so that stripes will not occur in the color coveys.

The photosensitive member 41 has two conveyor roller pairs 44a.

44b, 45a, and 45b, the conveying speed of the photosensitive member 41 becomes stable, so that the light source unit) 1
4 and the flatness of the photosensitive member 41 are improved, and stable slit exposure can be performed. Therefore, in order to start slit exposure after reaching this state, after a predetermined time has elapsed from the start of the conveyance amount of the photosensitive member 41,
The mirror shutter 34 is operated to start slit exposure of the photosensitive member 41. At the start of this slit exposure, as shown in FIG. 6, the photosensitive member 41 has been conveyed a distance and is placed on the guide member 54. During slit exposure, the slit light reflected by the color original 12 passes through the lens unit 24, is reflected downward by the mirror shutter 34, and enters the exposure position, so that a part of the image of the color original 12 is transferred to the photosensitive member 41. An image is formed on this and recorded as a latent image.

When the photosensitive member 41 is conveyed at a constant speed along the guide member 54 while being subjected to slit exposure, the leading end of the photosensitive member 41 is lightly touched by the roller 56 and the turning roller 53. This 6
7, the sensor 23 detects the light source unit 14.
In order to detect this, the controller 93 drives the solenoid 35. As a result, the mirror shutter 34 retreats from the slit optical path, as shown in FIG. 7, and ends the slit exposure.

The rollers 56 are conveyor roller pairs 44a, 44b, 45.
When the photosensitive member a and 45b are reversed, the photosensitive member 41 is released by turning off the clutch 107, but the photosensitive member 41 is nipped between the rotating roller 53 and the rotating roller 53 due to the conveying force of the pair of conveying rollers 44 and 45. Then motor 1 through crack 107.112
08, the photosensitive member 41 is conveyed between it and the rotating roller 53. This photosensitive member 41 is connected to the guide member 5
5, it is moved around the turning roller 53 to a position where its tip collides with the first stopper 58.

When the tip of the photosensitive member 41 hits the first stopper 58, a signal is generated from a sensor (not shown), so that the controller 93 stops the rotation of the motor 10B. Next, the solenoid 59 is energized to retract the first stopper 58, and then the motor 115 is driven to drive the extrusion roller 6.
4. The roller pair 65 is rotated to transport the image receiving member 60 along the guide member 57. Here, the photosensitive member 41 is lightly nipped by the turning roller 53 and the roller 56, and the leading end thereof is substantially horizontal along the guide member 57. Since this photosensitive material 41 is stronger than the image receiving member 60, it functions as an upper guide and guides the image receiving member 60 toward the photosensitive member 41.
Smoothly insert it into the bottom of the. Then, the image receiving member 6
When a sensor (not shown) detects that the tip of the motor 115 has hit the second stopper 68, the rotation of the motor 115 is stopped.

As shown in FIG. 8, the image receiving member 60 is connected to the second stopper 6.
8, the photosensitive member 41 is placed over the funnel 62 of the image receiving member 60. Next, the solenoid 70 is actuated, so that the searuff 2 provided at the tip of the lever 71 descends to join the tip of the photosensitive member 41 onto the funnel 62 .

After the two members are joined, the second stopper 68 is retracted, the motor 108 is reversed, and the motor 11 is rotated at the same time.
Rotate 5. This motor 108 is connected to the clutch 107
, 113 to rotate the unfolding rollers 75, 76, and the motor 115 again rotates the rollers 64, 65.

These rollers 64, 65 push the rear end of the image receiving member 60 and cause it to move onto the developing rollers 75, 76. When the image receiving member 60 is transferred, the photosensitive member 41 bonded thereto is also transferred, and at this time, the roller 56 and the rotating roller 53 follow and rotate. In addition, the pushing roller 64 continues to rotate even after pushing out the rear end portion of the bonded image receiving member 60 from the cassette 63, so that the next image receiving member 6
0 is pushed out and its tip is passed around by the roller 65. Then, when the tip of the second image receiving member 60 is detected by the sensor 67, the rotation of the motor 115 is stopped.

The developing rollers 75 and 76 encircle the photosensitive member 41 and the image receiving member 60 and transfer them while applying pressure. At the initial stage of this street erosion, the developing body 61 is torn apart, so that the developing solution stored inside the two members 41.6
It is extruded and spread out to a uniform liquid thickness during the time of 0. The two unfolded members 41 and 60 are inserted into a passage 81 of a constant temperature plate 82 which is maintained at a predetermined temperature, for example, 25° C., by a temperature sensor 83 and a heater 79.

The two members 41 and 60 are left with their tips slightly protruding from the passage 81, and the diffusion transfer proceeds between them. When the door 84 is opened after confirming that the buzzer has sounded after a predetermined period of time has elapsed, the constant temperature plate 8
2 slides and protrudes from the device main body 10. If the two members 41 and 60 are pulled out from the constant temperature plate 82 and the image receiving member 60 is peeled off by hand, a color copy with a color copy image recorded thereon can be obtained.

When performing the next color copy, it is sufficient to set another color original on the original placing surface 11 and operate the copy key. In this case, the tip of the image receiving member 60 is 18
1, pre-scanning is immediately started, and drawing out of the photosensitive member 41 from the magazine 40 is started. Note that if the image receiving member 60 is not in the cassette 63, the image receiving member 60 was not pushed out from the cassette 63 during the previous color copying. In this case, since no detection signal is generated from the sensor 67, the rollers 64 and 65 are rotated by the motor 11-5 as described above. If a detection signal is not generated from the sensor 67 even after a predetermined period of time has elapsed since the start of rotation of the extrusion roller 64, the controller 93 stops driving the motor 115, interrupts the copying sequence, and displays a display (not shown). ) to the image receiving member 6
0 "out of paper" is displayed.

Although the above embodiment is a diffusion transfer copying machine, the present invention can also be applied to other silver halide photocopying machines using direct positive photosensitive materials, etc., as described above. Further, although the guide member 43 is arranged above the guide member 54, it may be arranged below the guide member 54.

〔Effect of the invention〕

As described in detail above, according to the present invention, the first and second conveyance roller pairs are provided on both sides of the exposure position, and the first guide member is disposed obliquely close to the first conveyance roller pair. At the same time, a second guide member is arranged horizontally close to the first pair of transport rollers in alignment with the first transport roller pair, and the unexposed photosensitive material is transported through the first guide member during slit exposure. Since the photosensitive material is returned via the second guide member, the width of the exposure stage can be made narrow, and the photosensitive material can be held at the exposure position while maintaining good flatness.

Furthermore, although the edges of the photosensitive material are somewhat curled, the first guide member and the second guide member are arranged so that their edges are close to the first pair of transport rollers. When the photosensitive material is returned during slit exposure and its rear end slightly leaves the first pair of transport rollers, it can immediately enter between the first and second guide members. Therefore, the rear end of the photosensitive material does not hit the end of the first guide member and can be returned smoothly along the horizontal guide member, so that stripes may occur due to slipping of the pair of conveying rollers or speed fluctuations. can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention. FIGS. 2A and 2B are side views showing the state in which the photosensitive member is transported by the pair of transport rollers. FIG. 3 is a block diagram showing the electrical configuration of the present invention. 4 to 8 are explanatory diagrams showing the conveyance state of the photosensitive member and the image receiving member. 10...Apparatus main body II...Original placement surface 12...Color original 14...Light source unit 24...Lens unit 27.28...Aperture plate 29...Green absorption filter 40...・Magazine 41...Photosensitive member 43.54...Guide members 44a, 44b, 45a, 45b...Conveyance roller 46...
...Exposure stage 48...Pathway 58.68...Stopper 60...Image receiving member 63...Cassette 72...Seatough 5.76...Development roller 78...Temperature control unit. (B)

Claims (2)

[Claims] (1) They are placed on both sides of the exposure position where slit exposure is performed, and rotate in the forward direction prior to slit exposure to transport the unexposed photosensitive material until its trailing edge passes the exposure position, and rotate in reverse during slit exposure. a first and a second pair of transport rollers for returning the photosensitive material so that it passes through the exposure position at a constant speed; A first guide member that is arranged close to each other in a vertically shifted state and guides an unexposed photosensitive material toward a first pair of conveyance rollers; 1. An exposure device for a copying machine, comprising: a second guide member which is arranged horizontally and horizontally guides the exposed photosensitive material conveyed by the first pair of conveyance rollers. (2) The exposure apparatus for a copying machine according to claim 1, wherein the first and second guide members are channel-shaped.