JPH043254A - Retrieving device for microfilm reader - Google Patents

Abstract

PURPOSE:To shorten the retrieval time by always rewriting continuously the contents of a memory means by the latest data of running from the head of a film and blip information, etc., stopping a film feed immediately when a target frame is detected, and also, inhibiting rewriting of the memory means. CONSTITUTION:When a film is running, the running quantity from the head of the film and blip information are integrated, for instance, by a counter in a running quantity detecting means 126 and a blip detecting means 70, respectively, and by these new data, the contents of a semiconductor memory means 110 are always rewritten. When a coincidence/noncoincidence discriminating means 130 detects a target frame, based on the contents of the counter of the blip detecting means 70, rewriting of the memory means 110 is inhibited immediately. Accordingly, in this memory means 110, a running distance of blip information of the target frame itself or a frame being extremely near thereto are stored. In such a way, the time required for the retrieval can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a search device for a microfilm reader that searches for a target frame using a flip attached to a film.

(Technical Background of the Invention) There have conventionally been microfilm reader printer devices capable of displaying the address within the film of the image being displayed. This address is usually indicated by a flip (document mark), and is recorded hierarchically, for example, in three groups, large, medium, and small.

FIG. 5 is a diagram showing the form of the roll microfilm 2, and a retrieval flip 6 (6a, 6b) is imprinted on the top and bottom of each frame 4 of the film 2. These flips 6 are used to identify three levels, large, medium, and small, by changing their vertical positions and widths.
A block representing a book or one volume, a file representing a chapter within this block, and a page representing the order within this file are shown. The conventional device feeds the film 2 in the forward direction from right to left in FIG. 5 and reads the flip 6.
The number of flips 6 is accumulated by a counter separately for each layer to obtain the block number, file number, and page number,
This was to be displayed as an address.

For example, frame 4A with absolute address 5 in FIG. 5 is 1 block, 2 files, and 2 pages, and is addressed as 1-2-2.

Here, each flip 6 is set so that, for example, the upper flip 6a indicates a block, and the lower flip 6a indicates a file and a page due to the difference in width. That is, the width of the lower flip 6b is detected, and for example, a wide flip is determined to indicate a file, and a narrow flip is determined to indicate a page.

The flip information read in this manner and accumulated by the counter is compared with the flip information of the frame targeted for search. However, since the film is being fed at high speed, the film will have been fed a considerable distance before the film stops after the target frame is detected. Conventionally, therefore, the amount of travel of the film until it stops after the target frame is detected is recorded, and the film is fed backward by the recorded amount of travel.

(Problems with the prior art) However, this conventional method compares the flip information being accumulated in the counter with the flip information of the target frame and determines that they match, and then reads out the contents of the counter (flip information) and Information such as separation was read into a calculation device and used as data to determine the amount to be reversed after the film was stopped. That is, the mileage and flip information read into the arithmetic unit do not correspond to the target frame, but are data for other frames after the target frame. For this reason, the target frame cannot be detected with high precision due to backward feeding of the film, and the film must be reciprocated many times in the vicinity of the target frame.

Therefore, there was a problem in that the search took time.

(Object of the Invention) The present invention has been made in view of the above circumstances, and provides a search device for a microfilm reader that makes it possible to shorten the time required for searching when searching for a target frame using flip. The purpose is to provide

(Structure of the Invention) According to the present invention, this object is to provide a traveling amount detection means for detecting the traveling distance from the beginning of the microfilm in a microfilm reader that searches for a predetermined target frame based on the flip attached to the microfilm. , a flip detection means for detecting flip information from the microfilm, a semiconductor memory means that is rewritten with new travel distances and flip information sequentially read out while the film is running, and a semiconductor memory means for determining whether the read flip matches the target frame or not. It is characterized by comprising a match/mismatch determining means for determining a match and prohibiting rewriting of the memory means when a match is made, and a feed control means for reversing the film from the film stop position using the contents of the memory means to search for a target frame. This is achieved by a microfilm reader retrieval device.

(Function) While the film is running, the running distance from the beginning of the film and the flip information are accumulated by, for example, a counter in the running distance detecting means and the flip detecting means, respectively, and the contents of the semiconductor memory means are constantly rewritten with these new data. It is being

This rewriting is performed simultaneously for each digit of binary information of each data, and is therefore extremely fast. When the match/mismatch determining means detects the target frame based on the contents of the counter of the flip detecting means, rewriting of the memory means is immediately prohibited.

Therefore, the running distance and flip information of the target frame itself or a frame very close to the target frame are stored in this memory means. The amount of rewinding is determined by comparing the data stored in this memory means with the data at the film stop position.
The target frame is searched.

(Example) Fig. 1 is an overall schematic diagram of an embodiment of the present invention, Fig. 2 is a perspective view of a part thereof, Fig. 3 is a system diagram of its control signals, and Fig. 4 shows only the main parts. It is a conceptual diagram.

The roll microfilm 2 used in the second embodiment is stored in a cartridge 8 (FIGS. 1 to 3) and loaded into the no-dublinter device IO.

The no-dubinter device 10 is configured as shown in FIG. That is, the front of the case 12 (right side in Figure 1)
A transmissive screen 14 is disposed at , on which an enlarged image of the frame 4 of the cartridge 8 is projected. The cartridge 8 is loaded into a loading section 16 located below the screen 14.

The leading end of the film 2 wound on the supply reel 18 in the cartridge 8 is pulled out by a loading mechanism and wound on the take-up reel 20. both reels 1
A light source 22 is arranged below between 8.20 and 20. The light emitted from this light source 22 passes through the film 2 and passes through the projection lens 24.
, an image rotation prism 26, a plurality of reflecting mirrors 28.30.
The light is guided to the screen 14 through an optical system consisting of 32 and the like. As a result, the image information recorded on one frame 4 of the film 2 is enlarged and projected onto a 6 reflecting mirror 28.
．． A mirror 34 that can move forward and backward on the optical axis is provided between the mirrors 30 and 30, and during printing, image projection light is guided by this mirror 34 to a printer device 36 located below. Note that this printer device 36 is, for example, of a PPC type, and forms an electrostatic latent image of an image by exposing a photosensitive drum 36a (see FIG. 3), and makes a visible image by adhering toner to this latent image. , which is transferred onto printing paper and fixed. Further, this printer device 36 is provided with a masking device 38 that blocks the incidence of projection light, and particularly blocks the incident light that creates a black frame portion in the image in the case of a negative film.

The film advance mechanism is shown in FIG.

When the cartridge 8 is loaded into the loading section 16, the microswitch 40 detects this, and the CPU 102 (described later) activates the loading mechanism.

That is, a roller (not shown) is brought into rolling contact with the reel 18 through an opening 8a provided at the bottom of the cartridge 8, and the leading edge of the film 2 is pulled out and wound onto the take-up reel 20 via guide rollers 42, 44. Sensors 46, 48 for detecting the presence or absence of the film 2 are arranged near the guide rollers 42, 44.

An endless belt 50 is pressed against the winding wheel 20 and tightly contacts the film 2 being wound there. This endless belt 50
are guide rollers 52, 54, 56 and drive rollers 58
is wrapped around. The drive roller 58 is driven by a motor 60 and causes the belt 50 to run in the direction of arrow A, that is, in the winding direction. As a result, the film 2 is wound onto the reel 20 while being sandwiched between the belt 50 and the reel 20. Note that the rotation shaft of the mokuro 2 is automatically connected to the supply reel 18 when the cartridge 8 is loaded. The film 2 is rewound by driving the reel 18 in the direction of arrow B by the motor 62. At this time as well, the belt 50 runs together with the film 2.

A tension roller 64 is pressed against the endless belt 50 with a predetermined pressure to apply appropriate tension to the belt 50.

The rotation speed of the tension roller 64 is detected by an encoder 66. Based on the output pulse signal of the encoder 66, the running amount of the endless belt 50, that is, the running amount of the film 2, is determined by the running amount detecting means 126 included in the CPTJ 102, which will be described later.

The flip 6 provided on the film 2 has two sets of light emitting elements 68 (68a, 68b) and light receiving elements 70 (70a, 70b). Of the light emitted from the light emitting element 68, only the light passing through the flip 6 is selected by the slit 72 and guided to the light receiving element 70.

Note that the upper flip 6a showing the block is the light receiving element 70.
a, and the lower flip 6b indicating the file and page is detected by the light receiving element 70b. The output of the light-receiving element 70b is used to identify files and page flips using the permissible range of flip width input in advance.

The outputs of these light receiving elements 70 are input to the CPU 102,
By integrating the types of flips 6 and the number of passes, the frames 4 that have passed under the light receiving element 70 are identified. Since the distance between the detected position of the flip 6 and the optical axis C is constant ρ, by monitoring the amount of film travel detected by the encoder 66, the frame 4 being projected can be identified.

In other words, when the target flip 6 of frame 4 is detected,
Film 2 further away from there! Bamboo winding 1 le 20
If the target frame 4 is sent to the side, the target frame 4 will enter the optical axis C.

The image information of the target frame 4 that has entered the optical axis C in this manner is projected onto the screen 14. Here, the magnification of the projection lens 24 is variable by a motor 74, and the rotation angle of the image rotating prism 26 is variable by the motor 76 (FIG. 3).

Behind the screen 14, the CCD line sensor 78 is held by a movable plate 80, and the movable plate 80 is movable left and right on guide rails 82 and 84. This movable plate 80 has a pair of pulleys 86.8 as shown in FIG.
Both ends of the wire 90 wound around the wire 8 are fixed.

The pulley 88 is rotated by a motor 92, and a wire 90 running therewith moves the movable plate 80 left and right.

Next, the control device 100 will be explained based on FIG. The control device lOO includes a digital arithmetic unit (hereinafter referred to as CPU) 102 and input/output interfaces (I/F) 104 and 106.
, ROM 108 that stores operating programs, etc., and RA
It has Mll0 etc. RAMll0 is line sensor 7
8, and stores various data such as image signals, travel distance, and flip information. Various signals are input to this CPU 102 via an input I/F.

For example, the image signal a read by the line sensor 78, the output signals of the microswitch 40, the sensor 46, 48, the light receiving element 70, the encoder 66, etc. are input. Also, from the keyboard 112, the identification code (address) of the target frame,
Alternatively, the identification code of the image to be printed is also input.

Reference numeral 114 is a manual speed setting device for inputting the feeding direction and feeding speed of the film 2.

The operation knob 116 of the speed setter 114 has a tendency to return to the neutral position, and when it is rotated from the neutral position to either the left or right, the amount of rotation is input to the CPU 102. C
The PU 102 controls the feeding direction and speed of the film 2 in accordance with the direction and amount of rotation of the operation knob 116 from the neutral position.

That is, when the operating knob 116 is at the neutral position, the film 2 is stopped; when turned to the left, the motor 60 is activated and the film 2 is moved to the left in FIG. 3; when turned to the right, the motor 62 is activated and the film 2 is moved. Drive to the right.

Reference numeral 118 denotes a liquid crystal display panel, which displays the address of the image being read, as will be described later.

A digital printer 120 prints an image read by the line sensor 78 as necessary, or connects another reader printer device to the CPU 102 and outputs an image sent from another device.

The CPU 102 has the function of the flip detection means A shown in FIG. 4, and counts the number of flips 6 for each type. That is, when the film 2 is running, the flips 6a indicating blocks are read by the light receiving element 70a, and the number of flips 6a is added to the block counting means 122. The flip 6b indicating the file and page is read by the light receiving element 70b, and the flip width is determined by the flip determining means 124. That is, the running amount detecting means 12 which integrates the output pulses of the encoder 66 as a running amount of the film 2
6, and the flip discrimination means 124 determines the flip width by detecting the amount of travel while the light receiving element 70b detects the flip 6b, and distinguishes between a flip indicating a file and a flip indicating a page. be.

When the light receiving elements 70a and 70b read the flips 6a and 6b while the film 2 is being fed, the flip detection means A adds up the number of flips 6a in the block counter means 122. Further, when the flip discrimination means 124 discriminates the type of flip 6b read by the light receiving element 70b, the file flips discriminated here are accumulated by the file counter means 126, and the page flips are accumulated by the page counter means 128. .

In this manner, while the film 2 is running, the running amount and the integrated values of the counter means 122, 126, 128 are constantly changing, and the memory means of RAMll0 is constantly being rewritten with these new data. Here, the binary signals indicating each digit of the integrated value are simultaneously input to the memory means (parallel processing), and the rewriting is performed extremely quickly.

The count values of these counter means 122, 126, and 128 indicate the address of the image being read, and this address is compared with the address input from the keyboard 112 or the like in the match/mismatch determining means 130.

If the addresses match, the feed control means i32
stops the motors 60, 62. However, due to the inertia of the rotating parts, the film 2 continues to travel by an appropriate amount. film 2
The travel distance L' at the stop position is sent to the feed control means 132, where the rewind amount (L'-L) is determined and reverse feed is performed. Then, the film 2 is returned to the vicinity of the target frame, and the film 2 is further forwarded or reversed as necessary to detect the target frame.

In the above embodiment, the flip 6b includes two types of flips with different widths, but the present invention is not limited to this. Further, although the amount of travel from the beginning of the film is detected by the encoder 66, it is also possible to use the order of frames from the beginning of the film (absolute address) instead of or in combination with this. Furthermore, the flip information may include not only the count value of the counter means 122, 126, 128, but also the position and width of the flip. In this case, it is possible to further improve the accuracy of searching for the target frame during reverse transport.

(Effects of the Invention) As described above, the present invention continuously rewrites the contents of the semiconductor memory means with the latest data such as the travel distance from the beginning of the film and flip information in parallel with film travel, and when a target frame is detected. Film feeding is immediately stopped and rewriting of the memory means is prohibited. For this reason, the memory means stores the traveling distance of 4 degrees and flip information of the target frame itself or a frame very close to the target frame. Therefore, it is possible to determine with high precision the amount of film feed necessary for reverse feeding to the target frame, and the search time can be shortened.

[Brief explanation of drawings]

Fig. 1 is an overall schematic diagram of an embodiment of the present invention, Fig. 2 is a perspective view of a part thereof, Fig. 3 is a system diagram of its control signals, Fig. 4 is a conceptual diagram showing only the main parts, and Fig. 4 is a conceptual diagram showing only the main parts. Figure 5 shows a microfilm. 2...Microfilm, 6...Flip, 1
0...Reader printer device, 110...RAM as memory means, 122...
Block counter means, 124... Flip discrimination means, 126... Travel amount detection means, 128... Page counter means, 130-... Match/mismatch discrimination means, 132... Feed control means,

Claims (1)

[Claims] A microfilm reader that searches for a predetermined target frame based on a flip attached to a microfilm, comprising: a traveling amount detection means for detecting a traveling distance from the beginning of the microfilm; A flip detection means for detecting, a semiconductor memory means that is rewritten with new traveling distances and flip information sequentially detected while the film is running, and a judgment as to whether or not the read flip matches the target frame, and if it matches, the memory means is rewritten. A retrieval device for a microfilm reader, characterized in that the retrieval device for a microfilm reader is equipped with a match/mismatch determining means for prohibiting a film stop position, and a feed control means for reversing the film from a film stop position using the contents of the memory means and retrieving a target frame. .