JPS58194023A - Reader printer - Google Patents

Abstract

PURPOSE:To change a picture in direction correctly and to prevent erroneous operation by moving a mirror as image rotation is necessary during a read of an original by a reader printer which moves the original and a photoreceptor for scan exposure. CONSTITUTION:When this device operates as a reader, a picture is magnified and projected on a screen 18 through a projection lens 14 and mirrors 15-17. The mirror 16 for optical path switching is at a solid-line position in read mode and moves to a broken-line position in copy mode to magnify and project the picture of a microfilm F on a drum 20 through the projection lens 14 and mirrors 15, 16, and 19. A line (b) shows the optical path for the reader and a line C shows the optical path for a printer. After the mirror 16 moves to the broken- line position in copy mode, the microfilm F is fed as shown by an arrow (a) synchronously with the drum 20 to form the picture on the drum 20 by scan exposure. The feeding speed of the microfilm depends upon projection magnification.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a reader printer that can be switched between a reader ti that projects an image of an original onto a screen and a printer state that projects this 11111g# onto a photoreceptor. .

This type of reader printer projects an image recorded on a document such as a film onto the entire screen and reads it, and when copying, it switches the optical path using a reflector etc. so that the image can be copied onto a photoreceptor. Figure 1 and Figure 2 are the originals to be used with this reader printer.
This original image 1#! is produced by using a film film in which the original image 1 is recorded vertically, such as the microfiche F1 and the long microfilm F2 shown in the figure. When the image 1 is projected onto the screen, the image 1 is vertically projected onto the screen 2 as shown in FIG. 5, and can be easily read.

However, by using a film in which the original image 3 is recorded horizontally, such as the microfiche F3 and the long microfilm F4 shown in Figures 3 and 4, the original image G13 is projected onto the screen. Then, as shown in FIG. 6, the image 3 is projected sideways onto the screen 2, and in this state an open circuit occurs that makes it difficult to read the image. Therefore, when using films F and +F4, a prism for image rotation is placed on the optical path, and by rotating this prism, the projected image is rotated 90 degrees around the optical axis.
It is only necessary to convert the horizontally oriented projected image into a vertically oriented image. 5 is a print frame showing a copying area.

By the way, in a reader printer configured in this way, there is no problem when copying with a silent full-surface simultaneous exposure method with the original and the photoreceptor completely stationary, but when the original and the photoreceptor are moved and the slit exposure is performed, there is no problem. When copying using the method, the valley film F"l + F2 y F31 F'4
When the film is moved in the direction of the ``notch'' ■ and copied using slit exposure, the films F, , F.

You can obtain a correct copy image with the film F8.
．． When using F, if the prism is rotated and the projected image is converted from landscape to portrait orientation and then copied, the direction of movement of the photoconductor and the direction of movement of the projected image on photoconductor 1 will be different. There was a drawback that a correct copy image could not be obtained.

The present invention aims to solve the above-mentioned drawbacks and provides a reader printer that can always obtain correct copied images regardless of the orientation of the image on the original.

The present invention will be explained below with reference to the drawings.

FIG. 7 shows a reader printer to which the present invention is applied, and is illuminated by an illumination device consisting of an image lamp 11 of a microfilm F and a condensing lens 12. At the time of the reader, this image is transmitted through the projection lens 14, mirrors 15 and 16.
．． The image is enlarged and projected onto the screen 18 via the screen 17 . The optical path switching mirror 16 is configured to be movable between a solid line position and a broken line position 16', and is placed at the solid line position during reader operation and at the broken line position during copying. When the mirror 16 moves to the dotted line position during copying, the image on the microfilm F is enlarged and projected onto the photosensitive drum 20 via the projection lens 14, mirrors 15, 16, and elongated mirror 19. The line C indicates the optical path for the reader, and the line C indicates the optical path for the printer. S is transfer paper. The photosensitive drum 20 rotates in the direction of arrow d, and well-known image forming devices such as a charger, a developer, a transfer charger, and a cleaner (not shown) are arranged around the photosensitive drum 20, and copies are made by electrophotography. be exposed. During copying, after the mirror 16 moves to the broken line position 16', the microfilm F is transferred to the photosensitive drum 2 by a feeding device (not shown).
In synchronization with the 0ON rotation, the microfilm F is transported in the direction of arrow a at a speed corresponding to the projection magnification, and the image on the microfilm F is exposed and scanned onto the photosensitive drum 20. The microfilm transport speed is changed depending on the projection magnification.

FIG. 8 shows a detailed tube of the projection lens 14, in which the imaging lens 21 is held in the holder 22.
A prism holder 24 that holds a trapezoidal prism 23 for image rotation is rotatably installed at 2 . The prism holder 24 is manually rotated, and when the prism holder 24 is rotated, the prism 23 rotates around the optical axis, and its projected image is rotated by an angle twice as large as the rotation angle of the prism. Therefore, when the prism 23 is rotated by 45 degrees around the optical axis e, the projected image is projected with its direction completely changed by 90 degrees, and by rotating the prism 23, the projected image can be changed to any direction. It can be projected onto the screen 18. Further, this prism holder 24 is rotated by a motor 25. A gear 26 connected to the motor 25 is disposed on the surface of the prism holder 24 and meshes with a gear 27. When the motor 25 is driven, the prism holder 24
is adapted to rotate relative to the prism 23.

A position code (not shown) is provided on the circumference of the prism holder 24.
For example, a protrusion is provided, and the fli code is detected by a code detector 30 consisting of a microswitch. The position code is not limited to a protrusion, and various types of codes can be used, and the code may not be detected mechanically but may be detected optically. When the prism 23 is placed at a predetermined position with respect to the rotational direction, the code detector 30 detects the position code and outputs a low-level signal, and at this time the projected image is projected without changing its orientation. Become.

That is, when the image of the microfilm Fly FW is projected onto the screen 18 while the code detector 30 is detecting the position code gold, the image is projected vertically,
You can read this image correctly and also use the film F.
When the image of B l F4 is projected onto the screen 18, the image is projected sideways, and this image 1# cannot be read correctly.

Therefore, when using the film Fs, F<,
Rotate the prism holder 24 by 45 degrees in a predetermined direction by hand, change the direction of the projected image, and project the projected image vertically on the screen 18. ]I can read the image correctly. At this time, the code detection element 30 detects the position code '? c) Outputs a level 1 signal when not detected.

Figure 9 shows one feeding control circuit of the motor 25, where υ, 31 is a copy button, 32 is an AND gate circuit, and 33d
, Noritsubu flop circuit, 34 is an inverter circuit, 35
is the drive control 1111 circuit. Copy button a1 is a high-level copy command (
Outputs 1-.

Next, the operation of the above reader printer will be explained 3.
1. When using film F or F2 on which images are recorded vertically as shown in FIGS. 1 and 2, 1. The prism 23 is placed in a predetermined rotational position (in which the code detector 30 detects the position code), and in this state the microfilm image is projected onto the screen in the correct orientation for reading. 2 After reading this drawing and turning on the copy button 31, the code detector 30 has detected the position code, so the motor 25 will not rotate.
After the i-sea 16 moves to the broken line position 16', the microfilm moves at a constant speed in the direction of arrow a in synchronization with the rotation of the photosensitive drum 2o in response to a copy command signal, and the projected image is thereby transferred onto the photosensitive drum 20. The microfilm is exposed and scanned, and the image on this microfilm is correctly copied.

Next, as shown in Figs. 3 and 4, when using a film F3 or F4 '5c on which images are recorded horizontally, the prism holder 24 is rotated at a 45° angle in a predetermined direction.
Rotate to change the direction of the projected image and project it on screen 1B-'11! Project vertically. After viewing this image, when the copy button 31'tl is turned on, the code detector 30 does not detect the position code, so the AND gate circuit 32 opens, and the output signal of the AND gate circuit [32] %33 is set, and the set output signal rotates the motor 25 via the p drive control circuit 35, and the prism holder 24 automatically rotates. When the code detector 30 detects the position code, the 7-lip flop circuit 38 is reset and the rotation of the motor 25 is stopped. Therefore, the prism 23 is automatically placed in a predetermined rotational position and ready for copying.

The rotation of the motor 25 is completed, and the mirror 16 is at the position l shown by the broken line.
6', the microfilm is moved in the direction of arrow a by the copy command signal, and the image on this microfilm is correctly copied. Therefore, no matter where the prism is placed, the 7mm frame will be placed at a predetermined correct position during copying, and a correct copied image can always be obtained. .

As an optical system for rotating the projected image, mirrors 50, 51, 5 are used in place of the prism, as shown in FIGS. 10 and 11.
2 may be combined and the projected image may be rotated by rotating these mirrors integrally about the optical axis e.

In the embodiment, the prism is rotated using a motor and gears, but a transmission mechanism (such as a belt chain) may also be used, or a driving source τ such as a solenoid may also be used.1. Further, the position of the prism may be detected by using known electric or magnetic detection means instead of a microswitch. It is possible to create a position code not in one place but in two places.

As described above, the present invention provides a reader printer that performs slit exposure by moving and scanning an original and a photoreceptor, and when it is necessary to rotate an image when reading an original, it is possible to correctly change the orientation of the image and read it. Moreover, when copying this image, it is possible to prevent operational errors and always copy correctly.

[Brief explanation of the drawing]

Figures 1, 2, 3, and 4 are diagrams explaining the state of images recorded on microfilm, and Figures 5 and 6 are diagrams showing the orientation of images projected on the screen. 7 is a configuration diagram of a reader printer showing one implementation of the present invention, FIG. 8 is a sectional view showing details of the projection lens, and FIG. 9 is a diagram showing the control UM of the monitor. , FIG. 1θ, and FIG. 11 are configuration diagrams showing other embodiments of the high rotation means. . 21... Lens 23... Prism 25... Motor 30... Coat detector. wo hill fall-') 1st side 20th

Claims (1)

[Claims] (1) In a reader printer that projects the image of the original onto the entire screen and reads it, and then copies the image using a slit exposure method by moving the original and a photoreceptor, it is placed in the optical path and reads the projected image. An optical system for rotating,
a driving means for rotating the optical system; a detecting means for detecting a predetermined position of the optical system; and a detecting means for rotating the optical system until the detecting means detects a predetermined position of the optical system during copying. A reader printer comprising a drive control means for controlling a drive means.