JPS62139542A - Information retrieving device - Google Patents

Abstract

PURPOSE:To facilitate a copying operation by reading the size of a projection image during the conveyance of an information recording medium and selecting optimum transfer paper size corresponding to the enlargement rate of the information recording medium automatically with the read signal. CONSTITUTION:A microfilm F is lighted by a lighting means 3 and its image is projected on a screen 11 with specific magnification through mirrors 7-10. Further, when the image of the microfilm F is copied, mirrors 12 and 13 are arranged on an optical path, which is extended to a photosensitive drum 15 to project the image. Further, a line sensor (light quantity sensor) 16 is arranged on the optical path (a) movably and the edge part of the image is calculated to read the size of the image. The read signal of the size of the image is sent to a cassette selecting circuit and the transfer paper 1 or 2 of optimum size is selected to take a copy. Thus, a read means for the size of a projection image is arranged, so optimum transfer paper size is selected automatically to eliminate miscopying completely.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention can be switched between a reader state in which an image of an information recording medium such as a microfilm is projected onto a screen, and a printer state in which the image is projected onto a photoreceptor. The present invention relates to information retrieval devices such as reader printers.

(Prior Art) Conventionally, this type of information retrieval device uses a film with a retrieval mark attached to the side of each image frame of the film, optically detects this mark, and counts the marks to search the film. The desired frame inside is automatically searched.

The above search device illuminates the mark on the film with a lamp,
When transporting the film, a mark detector detects changes in the light blocked by the marks, and a counter counts the output signal of this mark detector. The comparison circuit compares the frame number of the image frame with the frame number of the desired image frame, and when the two match, the comparison circuit issues a stop signal to the drive control circuit, stopping the drive system that transports the film, and moving the desired image frame onto the screen. It is designed to remain stationary at a predetermined position projected above. In general, with information retrieval devices, the operator projects the image frames of the film onto a screen, observes them, and prints them as necessary.

(Problem to be Solved by the Invention) In the conventional example, when printing, the operator commands the optimal paper size using the keyboard, taking into consideration the image position on the screen and the projection magnification. Since printing was performed after printing, the operation was complicated, and if the print button was pressed inadvertently, the printer would print on the wrong paper size, resulting in a copy error.

Therefore, the present invention has been made in order to solve the above-mentioned problems of the conventional example, and its purpose is to prevent copy mistakes, simplify the copy operation by the operator, and reduce the burden on the operator. The goal is to reduce it.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a projection image reading means for reading the size of a projected image while feeding an information recording medium, and and selecting means for receiving a signal from the reading means and selecting a transfer sheet corresponding to the size of the projected image.

(Function) In the present invention, the size of the projected image is read by the projection image reading means while the information recording medium is being fed, and based on this signal, the selection means selects the transfer paper most suitable for the enlargement magnification of the information recording medium. The size is automatically selected.

(Example) The present invention will be explained below based on the illustrated example. 1st
The figure shows a schematic configuration of a league printer to which the present invention is applied.
．． It is illuminated by an illumination means consisting of a condenser lens 5, and the illuminated image is projected by a projection lens 6 and mirrors 7-1.
The image is projected onto the screen 11 at a predetermined magnification by the lens 6 by the league part optical system consisting of 0. in this case,
Scan mirror 12.13 for printer is screen 1
It has retreated in the direction of arrow W to a position where it does not block the projection optical path a for 1.

When copying an image on microfilm F as an information recording medium, mirror 8 and mirror 9 are used as shown in FIG.
A mirror 12 is disposed on the optical path between the mirrors 12 and 13, and the mirrors 12 and 13 are moved together in the direction of arrow W at the circumferential speed of the photosensitive drum 15 to scan the image light of the microfilm on the mirror 8. The light is then projected onto the exposure position of the photosensitive drum 15 through the slit 14 via the mirrors 12 and 13.

A charging device, a developing device, a transfer device, and a cleaning device are arranged around the photosensitive drum 15, and copies can be obtained by a known process.

On the other hand, 1 is a cassette that stores A4 size transfer paper,
2 is a cassette that stores A3 size transfer paper;
These transfer sheets are stored in a known paper feed cassette, and are fed from the paper feed cassette selected based on a print command.

Reference numeral 16 indicates a line sensor (light amount sensor) which can enter and exit the projection optical path a; 17 indicates a supply reel for supplying the microfilm F; 18 indicates a film feeding motor attached to the supply reel 17; and 19 indicates a winding of the microfilm F. A take-up reel 20 is a film tensioning and take-up motor attached to the take-up reel 19, and 21 is a film holding member for holding down the microfilm F. Further, 22 is a capstan roller that can rotate in the forward and reverse directions, and the microfilm F is wound between the supply reel 17 and the take-up reel 19 and taken up on the take-up reel 19 by the forward and reverse rotation of the capstan roller 22. Or it is rewound onto the supply reel 17.

Next, the operation of the information retrieval device according to the present invention will be explained. The microfilm F is a roll film as shown in FIG. 2, and a search mark 23 is attached to each image frame. Here, when a frame number in the roll film is specified using a keyboard (not shown), the line sensor 16 as a projection image reading means is moved to the projection optical path a and placed there.Next, the capstan roller 22 rotates forward or backward. When the specified frame number of the microfilm F is reached, the capstan roller 22 stops rotating and the line sensor 16 moves out of the projection optical path a. At this time, the search method using search marks is well known and will therefore be omitted.

In FIG. 3, the line sensor 16 includes a search circuit 32.
Image information based on the brightness of the image projected only at the designated frame number is input moment by moment, and is sent to the memory circuit 25 and stored therein.

Next, from the search circuit 32, the I10 port 33° CPU 34
I10 port 33 to capstan drive circuit 28 via
A capstan stop signal is sent. Then, a line sensor movement signal is sent to the line sensor movement circuit 31 for moving the line sensor 16 out of the projection optical path a. On the other hand, the memory information sent to the memory circuit 25 is
The calculation result is sent to the arithmetic circuit 26, which mutually compares the information on each adjacent element or area from the gradation information (brightness information) of the screen and calculates the edge part of the image. is sent to the image area detection circuit 27, which detects the size of the image. At this time, when the operator presses the print button while looking at the specified frame projected on the screen 11, the CPU 34 sends a copy of the frame closest to the size of the projected image detected by the image area detection circuit 27 via the I10 port 33. A signal is sent to the cassette selection circuit 30 as a selection means to select the cassette of the paper size, and the paper feed roller driving means 29 feeds the optimum transfer paper size and transfers the exposed image onto the photosensitive drum 15. For example, in FIG. 2, if the designated frame is "A", cassette l containing A4 size transfer paper is selected, and the designated frame is "B". ”, the cassette 2 that stores A3 size transfer paper is selected. Here, if the size of the detected frame and the size of the transfer paper do not match, a signal to that effect is sent, the operation is stopped, or an alarm is issued by an alarm means such as a lamp or a buzzer.

In the above embodiment, by arranging the line sensor 16 within the projection optical path a, the positional deviation between the stopped frame to be detected and the line sensor 16 is reduced. In addition, if the line sensor 16 is placed outside the projection optical path a and the size of one image frame is small and multiple image frames are projected on one screen, the image frame to be stored does not necessarily occur when the stop signal is sent. It is not limited to what is detected by the line sensor 16, and it was necessary to calculate and detect only the shifted image frames, but in this embodiment, there is no need to add such a circuit.

In the above embodiment, the line sensor 1 is placed in the projection optical path a.
6 is inserted and removed to detect the size of the image, but the present invention is not limited to this, and it may be fixedly placed near the effective projection area, or may be placed on the screen.Furthermore, the size of the stopped frame can be detected. The timing may be detected by always overrunning the desired frame, or may be detected by reciprocating several times at the position of the stopped frame and detecting the timing in between.Furthermore, in the above embodiment, microfilm is used as the information recording medium. In addition to this, I used 7 percha cards.

It is sufficient to detect the size of the desired frame while moving a film fish or the like.

(Effects of the Invention) The information retrieval device according to the present invention has the above-described configuration and operation, and receives a signal from the projection image reading means for reading the size of the projected image, and uses the selection means to increase the size of the projected image. Since the transfer paper corresponding to the size of the transfer paper is selected, it is possible to automatically select the optimum transfer paper size for the enlargement magnification of the information recording medium, and even if the operator forgets to specify the transfer paper size, the optimum transfer paper size can be selected automatically. The paper size is selected and there are no mistakes in copying. Further, since there is no need to switch the transfer paper size, the copying operation by the operator is simplified, and the burden on the operator is reduced.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a leader printer to which the present invention is applied, Fig. 2 is a top view showing a microfilm of a league printer, and Fig. 3 is a block diagram showing an embodiment of an information retrieval device according to the present invention. Explanation of the symbols 1...Cassette 2...Cassette 11...
- Screen 15... Photosensitive drum 16... Line sensor (projected image reading means) 22... Capstan roller 30... Cassette selection circuit (selection means) F... Microfilm

Claims (3)

[Claims] (1) A projection image reading means for reading the size of the projected image while the information recording medium is being fed, and a selection of obtaining a signal from the projection image reading means to select a transfer paper corresponding to the size of the projected image. An information retrieval device comprising: means. (2) The information retrieval device according to claim 1, wherein the projected image reading means is a light amount sensor. (3) The light amount sensor is disposed within the projection optical path while the information recording medium is being fed, and is retracted out of the projection optical path when the information recording medium is stopped. The information retrieval device according to item 2.