JPH03203728A - Copying machine with plural optical systems - Google Patents

Abstract

PURPOSE:To simplify the control system of the copying machine by using the same distance from the front edge of the picture of an original to a transfer means even when a latent image is formed on a transfer belt body with the use of a different optical system. CONSTITUTION:The angular displacement of an exposure plate 40 is carried out in such a manner that the distance in the original copying mode from the position P1 of the front edge of the picture of an original to a pressuring devel opment position is equal to the distance in the slide copying mode from the position P2 of the front edge of the picture of an original to the pressuring development position. Therefore, it is not necessary to change at every copying mode the timing at which an image receiving sheet is carried to the pressuring development position. Thus, the control system, for example, a program for controlling the timing at which an image receiving sheet is carried, is simplified, and the control of copying is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a copying machine having a plurality of optical systems capable of copying, for example, a sheet-like original and a slide film.

2. Description of the Related Art There are various image forming apparatuses that use a process of forming an image by irradiating a photosensitive material with a light image.

For example, there are image forming apparatuses that use electrophotography, which forms an electrostatic latent image by spraying f light onto a charged photoreceptor, develops the latent image with toner, and transfers and fixes it onto recording paper; By imagewise exposing a photosensitive sheet in which a large number of photocurable microcapsules disclosed in JP-A-58-88739 and JP-A-59-30537 are coated on a support, and then applying pressure, There is an image forming apparatus that destroys uncured microcapsules that have not been irradiated with light, causes the dye contained therein to flow out, colors an image receiving sheet, and forms an image.

Various efforts have been made to use these image forming apparatuses to copy different types of originals, such as slide films and sheet-like originals.

JP-A-58-182629 and JP-A-59-19
Publication No. 8442 states that when copying a slide film, a Fresnel lens, a screen, etc. are placed on the part of the document table on which a sheet-like original is placed when copying.
An apparatus has been disclosed that forms an image by projecting a film image onto the Fresnel lens or screen, and then exposing the projected image onto a photoreceptor. Furthermore, when copying a sheet original, it is necessary to remove the Fresnel lens, screen, etc.

Japanese Unexamined Patent Application Publication No. 103023/1983 discloses a system that has a plurality of document placement sections provided at different positions, and by switching the position of a switching mirror provided in the optical path between the document and the photoreceptor. An apparatus has been disclosed that can easily copy a document placed in either position.

In such a copying machine that has multiple document placement sections and multiple optical systems, by making part of the optical path common between each document placement section and the photoreceptor, the copying machine can be improved. The configuration has been made smaller. However, it may be difficult to make the optical path common in order to avoid compromising the space for the optical system cooling device and the cooling effect.

Therefore, in a copying machine using the photosensitive sheet, an exposure plate provided for exposing the photosensitive sheet 1- is
A copying machine in which optical paths are separated by angular displacement has been proposed. As a result, a sufficient space is secured for the cooling device for the optical system, and the cooling effect is not impaired.

Problems to be Solved by the Invention However, in the above-mentioned copying machine, the tip position of the image (latent image) formed on the photosensitive sheet on the exposure plate and the latent image can be adjusted by angularly displacing the exposure plate. The distance from the transfer position to the recording paper differs depending on the optical system. For this reason, the timing for transporting the recording paper to the transfer position must be individually controlled for each optical system, making the control complicated.

Furthermore, by changing the angle of the exposure plate, the photosensitive sheet is stretched or loosened.
A correction mechanism is required to correct the tension or slack of the photosensitive sheet. The correction mechanism may be, for example, a roller provided near the conveyance path of the photosensitive sheet, and when the photosensitive sheet becomes slack, the roller is moved across the conveyance path to tension the photosensitive sheet. There is a roller that is wound around a roller that can be rewound as needed. Therefore, there was a problem in that the internal structure of the copying machine became complicated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems and to provide a copying machine having a plurality of optical systems in which a conveying mechanism for a photosensitive sheet, which is a transfer band, is simplified.

Another object of the present invention is to provide a copying machine having a plurality of optical systems that can make the conveyance timing of recording paper the same during copying even when different optical systems are used.

Means for Solving the Problems The present invention provides a transfer band that is wound from a supply roller to a take-up roller in a machine and is conveyed along a conveyance path, and has a developer adhered thereto; a support means for supporting the body from the back side over a predetermined range along the conveyance direction at a predetermined exposure position on the conveyance path and driven for angular displacement around an axis intersecting the conveyance direction; and a transfer device on the support means. a first optical means for forming a document image on the belt; a second optical means for viewing the transfer belt on the support means from a different position along the conveyance direction than the first optical means; and a conveyance path with respect to the support means. a transfer means provided on the downstream side to transfer the latent image of the transfer belt onto the recording paper, and the support means is configured to transfer the latent image of the transfer belt to the recording paper at the exposure position of the transfer belt on the conveyance path from the supply roller to the take-up roller. A plurality of optical systems characterized in that the positions of the axes are selected so that the distance between the downstream end of the document image in the conveyance direction and the transfer means is the same when the support means is angularly displaced to both end positions. It's a copy machine.

The present invention also provides a transfer belt that is wound from a supply roller to a take-up roller in a machine and is transported along a transport path, and has a developer adhered thereto; A support means is supported from the back side over a predetermined range along the conveyance direction at a predetermined exposure position and is driven for angular displacement around an axis intersecting the conveyance direction, and a document image is transferred to a transfer band on the support means. - a first optical means for forming an image; a second optical means for viewing the transfer belt on the support means from a different position along the conveyance direction; and a second optical means provided on the downstream side of the conveyance path with respect to the support means. , a transfer means for transferring the latent image of the transfer belt onto the recording paper, and the support means adjusts the distance of the transfer belt on the conveyance path from the supply roller to the take-up roller by adjusting the distance between the support means and both end positions. A copying machine having a plurality of optical systems, characterized in that the position of the axis line is selected so that the position is the same in a displaced state.

According to the present invention, the transfer belt on which the developer is adhered is wound up from the supply roller to the take-up roller in the body of the copying machine and is conveyed along the conveyance path. A support means is provided at a predetermined exposure position on the transport path to support the transfer band from the back side over a predetermined range.

This support means is driven for angular displacement around an axis that intersects with the conveyance direction of the transfer band. Therefore, when the support means is angularly displaced to one end position, the document image can be formed on the transfer band on the support means by the first optical means, and when the support means is angularly displaced to the other end position. In this case, the image of the document f can be formed on the transfer band by the second optical means. Thereafter, the latent image on the transfer band is transferred onto recording paper by a transfer means.

Here, the support means adjusts the distance between the transfer means and the downstream end in the conveyance direction of the original image at the exposure position of the transfer band on the conveyance path from the supply roller to the take-up roller, with the support means angled at both end positions. The position of the axis is chosen so that it is the same in the displaced state. Therefore, even if a latent image is formed on the transfer band using a different optical system, the distance from the leading edge of the original image to the transfer means is the same, so there is no need to change the timing of conveying the recording paper to the transfer means. . This makes it possible to simplify the control system of the copying machine.

Further, according to the present invention, the transfer belt on which the developer is adhered is wound up from the supply roller to the take-up roller within the body of the copying machine, and is conveyed along the conveyance path.

A support means is provided at a predetermined exposure position on the transport path to support the transfer band from the back side over a predetermined range. This support means is driven for angular displacement around an axis that intersects with the conveyance direction of the transfer band. Therefore, when the support means is angularly displaced to one end position,
The first optical means can form an original image on the transfer band on the support means, and when the support means is angularly displaced to the other end position, the second optical means can form an original image on the transfer band. can be imaged. Part 10: The latent f-image on the transfer band is transferred onto the recording paper by the transfer means.

Here, the position of the axis of the support means is selected so that the distance of the transfer band on the conveyance path from the supply roller to the take-up roller is the same when the support means is angularly displaced to both end positions. Therefore, even if different optical systems are used, the length of the transfer strip on the conveyance path is the same, so the transfer strip is not stretched or loosened, and the tension of the transfer strip is Further, there is no need to provide a correction means for correcting slack, and the configuration of the copying machine can be simplified.

Embodiment FIG. 1 is a sectional view showing the basic structure of a copying machine 1 which is an embodiment of the present invention. A document table 2 is provided on the top surface of the copying machine 1. An optical system device consisting of copy lamps 3 and 4, mirrors 5 to 8, and a lens 9 is provided on the lower surface of the document table 2. Further, a sensor S14 for detecting the temperature of the document table 2 is provided. Of this optical system, the copy lamp 3.4 and mirrors 5 to 8 are mounted on a mirror unit 11.12, and are moved back and forth on the lower surface of the document table 2, which is made of hard transparent glass, etc., to remove the document. An image of a document 10 placed on a table 2 is scanned. A sensor S12 for detecting the position of the mirror unit 11 is provided below the mirror unit 11. Of the light from the copy lamp 3.4, the reflected light from the original 10 passes through mirrors 5 to 8 and lens 9, and is distributed to the exposure plate 40 as shown by the dashed line in the figure. 2
Expose 5. A heater 41 is provided on the opposite side of the exposure plate 40 from the photosensitive sheet 25.

Further, the exposure plate 40 is provided with a rotation shaft 39, and the exposure plate 40 is angularly displaced around the rotation shaft 39 in the directions of arrows C and D.

copy! /! Pressure rollers 46 and 47 are provided at the center of the interior of the image forming apparatus 1 and constitute a pressure developing device 48. The pressure roller 46 is urged toward the pressure roller 47 by auxiliary rollers 61, 62, and the pressure rollers 46, 47 are in contact with a predetermined pressure. This pressure roller 46.
47, a cartridge 23 containing a photosensitive sheet 25 is attached to the baguette 20. In the cartridge 23 made of this light-shielding material, the photosensitive sheet I.25 is wound around a supply roller 24.

The photosensitive sheet 25 is placed between a guide roller 27 and a roller 31 .
43, the exposure plate 40, and the pressure generator 1.
Guided by 8. The photosensitive sheet 25 that has passed through the pressure developing device 48 is transferred to the take-up roller 2 which is pivotally supported by the 5 curls 1 and 23.
It is wound up at 8.

A paper cassette 71 is attached to the side of the copying machine 1. The image receiving sheets 73 stored in the paper cassette 71 are fed one by one to the timing roller 49 by the rotation of the paper feed roller 75. The sensor S2 detects the presence or absence of an image receiving sheet in the paper cassettes 1 to 71, and the sensor S4 detects the type (sheet size) of the paper cassette 71. An image receiving sheet double feed detection sensor S7 is provided near the timing roller 49.

The timing roller 49 starts rotating at a predetermined timing and guides the image receiving sheet 73 to the pressure developing device 48 . As a result, the image-receiving sheet 73 passes through the pressure developing device 48 together with the photosensitive sheet 25, passes through the conveyance roller 50 and the glossing device 51, and then is transferred to the paper ejection tray by the paper ejection roller 56.
It is discharged at 7.

An image receiving sheet detection sensor S8 is provided between the conveyance roller 50 and the glossing device 51, and an image receiving sheet detection sensor S9 is provided near the discharge roller 56.

A slide projector 100 is mounted near the center of the side surface of the copying machine 1. This slide projector 100 is equipped with a copy lamp 101, a slide holder 102, and a 10-angle projection lens 104 inside. The slide holder 102 holds the slide film 10
Hold 3.

Copy lamp 101 and projection lens] 0
4 is an exposure plate 4 as shown by a two-dot chain line in FIG.
It is arranged on a straight line with respect to 0.

The slide holder 102 moves in a direction perpendicular to the optical axis indicated by the two-dot chain line, and the slide film 103 is subjected to slit exposure by the copy lamp 101.

In the copying machine 1 configured as described above, when copying an image of the document 10 placed on the document table 2, the light reflected from the document is the first among the light from the copy lamp 3.4. As shown by the dashed line in the figure, the light is distributed to the exposure plate 40 via the mirrors 5 to 8 and the lens 9. Exposure plate 40
In the above, the leading edge position of the original image in the original copy mode is indicated by reference numeral P1.

The photosensitive sheet 25 is a photosensitive pressure-sensitive material, and a large number of microcapsules with a particle size of about 10 to 20 μIn containing a leuco dye and a photocuring substance are coated on the surface of the light-reflective metal sheet 1 such as aluminum. A selectively cured image is formed on the photosensitive sheet 25 which is irradiated with the reflected light from the original on the exposure plate 40. The image-receiving sheet 73 together with the photosensitive sheet 25 on which this selectively cured image is formed is subjected to pressure development.
Pressure is applied at the pressure development position of image device 48. This pressure destroys the uncured microcapsules on the photosensitive sheet 25, and the leuco dye contained therein leaks onto the image receiving sheet 73. A developing material that causes a coloring reaction when mixed with a leuco dye is coated on the image receiving sheet 73, and the image receiving sheet 7 that has passed through the pressure developing device 48
An image is formed on 3. The surface of the image-receiving sheet 73 is coated with a thermoplastic resin together with a developing material, and this thermoplastic resin is heated by the photo-iodizing device 51 and melts, giving gloss to the image.

On the other hand, when copying an image on a slide film, the exposure plate 40 moves to the position shown by the imaginary line in FIG.
An optical path from the copy lamp 101 to the exposure plate 40 is formed. As a result, the light from the copy lamp 101 that has passed through the slide film 103 is directed to the projection lens 10.
The light is distributed to the exposure plate 40 via 4. On the exposure plate 40, the leading edge position of the original image in the slide copy mode is indicated by reference numeral P2.

In the copying mode of the image on the slide film 103, the copy lamp 3.4 is turned off, and a selectively hardened image of the image on the slide film 103 is formed on the photosensitive sheet 25. Therefore, by operating devices other than the optical system including the copy lamp 3.4 in the same manner as when copying the image of the document 10 placed on the document table 2,
The image on the slide film 103 can be copied onto the image receiving sheets 1 to 73.

Various processing operations in the above-mentioned copying machine will be explained below.

Set a new cartridge 23 on the photosensitive sheet initial setting baguette 20, set the leader sheet provided at the tip of the photosensitive sheet 25 on the tractor roller 31, set the baguette/tooth 20 on the mounting part 21, and remove the front cover. close. As a result, the front cover opening/closing detection sensor S1 is turned on, the photosensitive sheet take-up roller 28, the pressure roller 47, and the tractor roller 31 rotate, and the leader sheet is wound around the take-up roller 28 by one inch.

When the winding is completed, the winding detection sensor S3 is turned on. Thereafter, the pressure of the pressure roller 46 is released, a predetermined amount of the photosensitive sheet 25 is conveyed, and the initial setting of the photosensitive sheet 25 is completed. When this photosensitive sheet is conveyed, the sensitivity information sensor SIO reads the mark related to the sensitivity information of the photosensitive sheet 25 attached to the back side of the leader sheet, and the reference position of the color correction filter provided in the optical path is switched according to the data. .

Pre-processing operation Pre-processing operation is performed when the front cover is closed after clearing a jam.
This is performed when the print switch 88 is operated or when the power switch is turned on.

If the sensor Sll detects that the buffer roller 43 is not at the home position, the pressure developing device 4
With the pressure 8 released, the buffer roller 43 is moved in the direction of arrow B, the take-up roller 28 is rotated, and the buffer roller 43 is moved to the home position.

The photosensitive sheet 25 is fixed so as not to move by the photosensitive sheet holding part 'N80 provided between the exposure operation bath roller 43 and the pressure developing device 148, and the rotation of the photosensitive sheet supply roller 24 is free (to some extent). There is friction between
In this state, the buffer roller 43 is moved in the direction of arrow A, and the image of the original 10 is slit-exposed onto the photosensitive sheet 25 on the exposure plate 40. Here, since the sensitivity of the six-light sheet 25 differs depending on the temperature, the temperature of the exposure plate 40 is controlled by the heater 41 so that it is at a predetermined temperature.

The temperature of the exposure plate 40 is detected by a sensor S13. Further, the exposure scanning length is determined by the size of the image receiving sheet 73 and the copying magnification.

When the exposure scan between exposure operation and pressure development is completed, the fixation of the photosensitive sheet 25 by the pressing member 80 is released, and while the rotation of the supply roller 24 is fixed, the take-up roller 28 is rotated, and the buffer roller 43 is moved in the direction of the arrow. It moves in the B direction at a predetermined speed V1. Since the take-up roller 28 is provided so as to slip with its drive source, the photosensitive sheet 25 is always conveyed under tension in accordance with the speed of the buffer roller 43.

Next, when a predetermined period T1 has elapsed after the buffer roller 43 starts moving in the direction of arrow B, the timing roller 4
9 is rotated to convey the image receiving sheet 73 to the pressure developing device 48. Furthermore, after the period T2 has elapsed (when the leading edge of the image-receiving sheet 73 reaches the pressure developing device 48), the movement of the buffer roller 43, the rotation of the take-up roller 28, and the rotation of the timing roller 49 are stopped, and the photosensitive sheet 25 and While the conveyance with the image receiving sheet 73 is stopped, the supply roller 24
The rotation lock is released and the pressure roller 46 is pressurized.

Pressure development operation After the pressure roller 46 has completed applying pressure, the pressure roller 47 is rotated at a pressure development speed V3, and the buffer roller 43 is moved at a speed V1 that is less than 1/2 of the pressure development speed V3. This allows constant tension to be applied to the photosensitive sheet 25 at all times, thereby preventing the photosensitive sheet 25 from becoming loose or wrinkled.

When the buffer roller 43 moves to the home position, the drive of the buffer roller 43 is stopped and the pressure developing device 4 is turned off.
The photosensitive sheet 25 is conveyed only by 8. Next, the sensor S5 detects that the rear end of the image receiving sheet 73 passes through the pressure developing device 48. When determined based on the output of S6 and the timer, the pressure of the pressure developing device 48 is released.

Post-processing operation The image-receiving sheet 73 subjected to pressure transfer is heated by the glossing device 51 and subjected to glossing treatment and coloring treatment. On the other hand, the used photosensitive sheet 25 is taken up by a take-up roller 28.

When the slide copy mode exposure plate 40 is moved to the position shown by the imaginary line using a manual lever provided inside the front cover, the mode is switched to the slide copy mode. The position of the exposure plate 40 is the sensor S1
5. It is detected by the output of S16. After that, by operating the print switch 88, the copy lamp 1
01 is turned on, the slide I film 103 moves, and the image of the slide film 103 slit-exposes the photosensitive sheet 25 on the exposure plate 40 through the lens 104.

The insertion amount of the color correction filter provided in the lens 9 is determined according to the input of the color adjustment key provided on the color correction operation panel and the sensitivity polarity of the photosensitive sheet 25 (mark attached to the leader sheet). and perform color correction.

The amount of rotation (rotation time) of the pressure roller 47 for detecting the remaining amount of the photosensitive sheet is measured, and the remaining amount is calculated accordingly.
When the sensor 310 detects the end mark attached to the back side of the copying machine 5, the copying operation being executed at that time is completed and the execution of the next copying operation is prohibited.

A cooling copy lamp 3.4 of the optical system and a cooling fan 90 for cooling the document table 2 are attached to the moving means (wire) of the mirror unit 11. The cooling fan 90 is operated to cool the optical system while scanning the document and moving the optical system.

Image-receiving sheet detection Since the surface of the image-receiving sheet 73 is coated with a developing material (acid) that develops the color of the leuco dye contained in the microcapsules, the front and back surfaces have different reflectances. Using this difference in reflectance, a pair of reflective optical sensors S5. Based on the difference in the output of S6, the distinction between paper and OHP sheets and the front and back sides of each sheet are detected.

FIG. 2 is a perspective view for explaining the angular displacement mechanism of the exposure plate 40. A rotating shaft 39 is provided at the downstream end of the exposure plate 40 in the conveying direction of the photosensitive sheet 25 . Rotating axis 3
Both ends of 9 are pivotally supported by frames 38a and 38b, respectively. Both ends in the width direction of the upstream end in the conveying direction of the photosensitive sheet 25 of the exposure plate 40 are connected to the rotating shaft 3 of the L-actor roller.
They are respectively fixed to support members 32 provided near both ends of the 0. Both ends of the rotating shaft 30 are connected to a frame 38=
Guide holes 37a371 formed in t and 38b respectively]
A switching lever 33 is provided at one end 30a of the rotating shaft 30. By operating the switching lever 33, the rotating shaft 30 moves along the guide holes 37a, 37b, and thereby the exposure plate 40 is angularly displaced about the three rotating shafts.

FIG. 3 is a perspective view showing a fixing mechanism for the rotating shaft 30. FIG.

A holding member 35 is disposed near the tractor roller 31 of the frame 38a where the guide hole 37a is formed, and extends over both ends of the angle change 11 of the rotating shaft 30. The holding member 35 is biased vertically by a spring 34. Pressing member 35
A recess 36a361) into which the rotating shaft 30 is fitted is formed on the opposite side of the spring 34. Therefore, for example, in the slide copying mode, the rotating shaft 30 is fitted into the recess 36b, and the holding member 35 is held by the cover spring 34.
The rotating shaft 30 is fixed by being pressed in the vertical direction.

Further, in the original copy mode, the rotating shaft 30 is fitted into the recess 36a, and the holding member 35 is held by the cover spring 34.
The rotating shaft 30 is fixed by being pressed in the vertical direction. Such a pressing member is also arranged on the guide hole 37b side.

In the vicinity of the recesses 36a and 36b, there are sensors S15. S16 is provided, and the fixed position of the rotating shaft 30, that is, the angular displacement position of the exposure plate 40 is detected based on the outputs of these sensors, and the copy mode is determined.

Figure 4 is? ! 1 is a block diagram showing the electrical configuration of the photocopier 1. FIG. Detection signals from the sensors S1 to S16 are input to the CPU 81 via the I10 interface 84.

Further, a panel controller 87 is connected to the CPU 81 via an I10 interface 84. This panel controller 87 controls the input/output of signals on the operation panel provided in the copying machine 1 . For example, the operation panel includes a mode display lamp 90. A print switch 88, a warning lamp 89, and the like are provided. The mode display lamp 90 lights up when a slide film copying mode using the slide projector 100 is selected. The print switch 88 is a switch that instructs the start of a copying operation. The eight warning lamps are turned on, for example, when it is detected that the mounting state of the slide film 103 is abnormal, and the situation is displayed to the operator.

The CPU 81 controls the light control unit 86 and the like based on input data from the print switch 88, sensors S1 to S16, etc. according to a program written in advance in the ROM 82, thereby controlling the copying operation. The copy lamp 3.4101 is connected to the light control unit 86, and the light control units 1 to 86 switch the copy lamps 3.4, 1 according to the control signal.
Controls lighting/extinguishing of 01. A part of the memory area of the RAM 83 connected to the CPU 81 is allocated to a working area for outputting control data.

FIG. 5 is a flowchart for explaining the copy mode determination operation in the copying machine 1. In step c1, the copying machine 1 enters a standby state by turning on the power, completing jam processing, or the like. In step c2, it is determined whether the mode is slide copy mode. The copy mode is determined by the fixed position of the rotating shaft 30, that is, by the sensor 5.
The determination is made based on the output of 15S16. If it is the slide copy mode, the process advances to step C3, where the copy lamp 101 is turned on and the copy lamps 3 and 4 are turned off. When the slide copy mode is not activated, that is, when the document copy mode is selected, the process proceeds to step C4, and the copy lamp 3.4 is turned on.
is turned on, and the copy lamp 101 is turned off.

As described above, according to this embodiment, the distance from the leading edge position P1 of the original image to the pressure development position in the original copy mode, and the distance from the leading edge position P2 of the original image to the pressure developing position in the slide copying mode. Since the exposure plate 40 is angularly displaced so that the distances are equal to each other, there is no need to change the timing of transporting the image receiving sheet 72 to the pressure development position for each copying mode, and the control system, for example, the image receiving sheet The program for controlling the transport timing of 72 is simplified, and copy control can be easily performed.

In this embodiment, the rotation shaft 39 is provided at the downstream end of the exposure plate 40 in the conveyance direction of the photosensitive sheet 25, but the leading edge position P1 of the document image in the document copy mode and the document image in the slide copy mode are tip position P
For example, the exposure plate 40 may be angularly displaced about the rotation axis of the buffer roller 43.

FIG. 6 is a sectional view for explaining another embodiment of the present invention. This embodiment is similar to the previous embodiment, and corresponding components are given the same reference numerals. The feature of this embodiment is that the rotation shaft 39 for angularly displacing the exposure plate 40 is provided at the midpoint of the length of the exposure plate 40 in the conveying direction of the photosensitive sheet 25.

FIG. 7 is a perspective view for explaining the angular displacement mechanism of the exposure plate 40. Three rotating shafts are provided at the midpoint of the length of the photosensitive sheet 25 in the conveyance direction of the exposure plate 40. Both ends of the three rotating shafts are each supported by a frame 38a38b. Both widthwise ends of the exposure plate 40 on the upstream side in the conveying direction of the photosensitive sheet 1 25 are fixed to support members 32 provided near both ends of the rotating shaft 30 of the tractor roller 31, respectively. Both ends of the rotating shaft 30 are made of Freno, 38a38
The switching lever 3 is inserted into guide holes 37a and 37b formed in the rotating shaft 30, respectively.
3 is provided.

Further, both widthwise ends of the exposure plate 40 on the downstream side in the conveyance direction are as follows:
They are each fixed to support members 45 provided near both ends of a rotating shaft 44 of the buffer roller 43 . Both ends of the rotating shaft 44 are inserted into guide holes 65a and 65b formed in the frames 38a and 38b, respectively.

Therefore, by operating the switching lever 33, the rotating shaft 30 moves along the guide holes 37a, 37b, and the rotating shaft 44 moves along the guide holes 65a, 65b.
As a result, the exposure plate 40 is angularly displaced about the rotating shaft 39. The fixing mechanism at both ends of the angular displacement of the rotating shaft 30 is the same as the structure shown in FIG. 3 described above.

As described above, according to this embodiment, since the exposure plate 40 is angularly displaced with the midpoint of the length of the exposure plate 40 in the transport direction as the rotation axis, the The lengths of the photosensitive sheet 25 from the supply roller 24 to the take-up roller 28 are equal. Therefore, when the exposure plate 40 is angularly displaced to switch the copy mode, the photosensitive sheet 25 will not be stretched or loosened. Thereby, there is no need to provide a correction means for correcting the tension or slack of the photosensitive sheet 25, and the configuration of the copying machine is simplified.

Effects of the Invention As described above, according to the present invention, the support means for supporting the transfer band is configured to support the transfer band in the transport direction of the original image at the exposure position of the transfer band on the transport path from the supply roller to the take-up roller. The position of the axis is selected so that the distance between the downstream end and the transfer means is the same when the support means is angularly displaced to both end positions. Therefore, even if a latent image is formed on the transfer band using a different optical system, the distance from the leading edge of the original image to the transfer means is the same, so there is no need to change the timing of conveying the recording paper to the transfer means. . This makes it possible to simplify the control system of the copying machine.

Further, according to the present invention, the support means for supporting the transfer belt maintains the same distance of the transfer belt on the conveyance path from the supply roller to the take-up roller when the support means is angularly displaced to both end positions. The axial force position is conveyed so that. Therefore, even if different optical systems are used, the length of the transfer strip on the conveyance path is the same, so the transfer strip is not pulled or
In addition, the transfer belt does not become loose, and there is no need to provide a correction means for correcting the tension or slack of the transfer band, and the configuration of the copying machine can be simplified.

[Brief explanation of drawings]

1I'2I is a cross-sectional view showing the basic structure of a copy 1111 which is an embodiment of the present invention, FIG. 2 is a perspective view for explaining the angular displacement mechanism of the exposure plate 40, and FIG. 4 is a block diagram showing the electrical configuration of the copying machine 1, and FIG. 5 is a flowchart 1 to 6I for explaining the copy mode selection operation in the copying machine 1.
Reference numeral 71 is a sectional view showing another embodiment of the present invention, and FIG. 7 is a perspective view for explaining another angular displacement N of the exposure plate 40. 1 Copy machine, 3.4,101 Copy lamp, 24.
- Supply roller, 25... Photosensitive sheet, 28 Take-up roller, 30, 39.44... Rotating shaft, 31... Tractor roller, 32.42... Support member, 33... Switching lever, 34... Spring , 35... presser member, 36a36b
Recess, 37a, 37b, 65a, 65b guide hole, 38a
, 38b・Freno 3.40 Exposure plate, 43 Buffalora

Claims (2)

[Claims] (1) A transfer belt that is wound from a supply roller to a take-up roller in the machine and is transported along a transport path, and has a developer adhered thereto; and a transfer belt that is predetermined on the transport path. a support means that is supported from the back side over a predetermined range along the conveyance direction at the exposed exposure position and driven for angular displacement around an axis that intersects with the conveyance direction; a first optical means for forming an image; a second optical means for viewing the transfer belt on the support means from a different position along the conveyance direction; and a second optical means provided on the downstream side of the conveyance path with respect to the support means; a transfer means for transferring the latent image of the transfer belt onto a recording paper, and the supporting means is located downstream in the conveyance direction of the document image at the exposure position of the transfer belt on the conveyance path extending from the supply roller to the take-up roller. A copying machine having a plurality of optical systems, characterized in that the position of the axis is selected so that the distance between the end and the transfer means is the same when the support means is angularly displaced to both end positions. (2) a transfer belt that is wound from a supply roller to a take-up roller in the machine and is transported along a transport path, and has a developer adhered thereto; and a transfer belt that is predetermined on the transport path. a support means that is supported from the back side over a predetermined range along the conveyance direction at the exposed exposure position and driven for angular displacement around an axis that intersects with the conveyance direction; a first optical means for forming an image; a second optical means for viewing the transfer belt on the support means from a different position along the conveyance direction; and a second optical means provided on the downstream side of the conveyance path with respect to the support means; a transfer means for transferring the latent image of the transfer belt onto the recording paper, and the support means angularly displaces the distance of the transfer belt on the conveyance path from the supply roller to the take-up roller to both end positions. 1. A copying machine having a plurality of optical systems, characterized in that the position of the axis is selected so that the positions of the axes are the same in the same state.