JPH02278372A - Microfilm retrieving device - Google Patents

Abstract

PURPOSE:To quickly position a picture frame to which a designated mark is attached at a prescribed position by executing positioning on the basis of the distance of overrunning from the designated mark. CONSTITUTION:A control device 38 is constituted of a CPU 82, a RAM 84 and a ROM 86, etc. Three kinds of speed patterns corresponding to the distance of an overrunning portion at the time of the positioning control of a microfilm are stored in the RAM 84, and at the time of the positioning control, one of these is selected, and the positioning control from an overrun position to the prescribed position is executed. Namely, in an arithmetic means, the conveyance distance of the mark corresponding to the retrieved object picture frame from a detected position to the position of the actual stop of conveyance is obtained, and the retrieved object picture frame is positioned to the prescribed position on the basis of this conveyance distance. Thus, the above-mentioned retrieved object picture frame can be quickly positioned at the prescribed position.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention detects a designated image (elephant frame) by detecting marks attached to each image frame recorded on a long microfilm. This invention relates to a microfilm retrieval device.

[Prior art]

Generally, on a long microfilm that is wound on a reel in layers, narrow marks called grip marks are attached near the image frames corresponding to the image frames recorded on the microfilm. . Hereinafter, such a mark for each image frame will be referred to as a page mark.

Furthermore, there are cases in which a plurality of image frames with related contents are continuously recorded (for example, the entire text of a patent specification). In order to classify such related image frames, blip marks, which are slightly wider than page marks, are sometimes attached. Hereinafter, such a related mark for each image frame will be referred to as a file mark. Furthermore, there are cases in which files with related contents mentioned above are classified by field, etc. (for example, patent specifications and related technical documents, or chapters 1 and 2 of one book, etc.). In order to classify a plurality of related files, in addition to page marks and file marks, blip marks, which are wider than file marks, may be added. Hereinafter, such marks for each of multiple files will be referred to as block marks.

Blip marks (page marks, file marks, block marks) are attached to both ends of the microfilm in the width direction, and mark detection sensors are attached to the respective end positions to transport the microfilm. It is designed to detect blip marks while

Here, the operator can specify a block mark, file mark, or page mark by manually inputting a predetermined numerical value from the keyboard. For example, 3.2.
10 manually, 10 of the 2nd file of the 3rd block
This means that the page has been specified.

When each mark is designated, the microfilm is conveyed in its longitudinal direction, and first the block mark of the third count is detected. From this point on, the second count file mark is detected, and after that detection, the tenth count page mark is detected. Searching for image frames in this way is easier than searching by counting page marks sequentially from the beginning, and the search time can be shortened.

In the microfilm retrieval device, the retrieved image frames are positioned on the optical axis for projection onto a screen.
It is enlarged and projected. Furthermore, the projected image can be copied if necessary.

By the way, since the microfilm is normally transported at high speed until the specified blip mark is detected, an overrun occurs even if the microfilm is tried to stop its transport immediately after detection. For this reason, conventionally, this overrun is corrected using a predetermined transport speed to move the designated image frame to a predetermined position.

[Problem to be solved by the invention]

However, if positioning is performed using only grip marks in this way, for example, if the file mark is stopped during an overrun, the page mark count will be reset, and the page mark cannot be rewound to the previous file mark. , the page marks must be re-counted. Therefore, there is a problem that positioning takes time and work efficiency is reduced.

Additionally, if the file stops within the same file, the page mark count of the overrun page mark can be subtracted during rewinding to detect the page mark of the specified count number.
Since the dimensional difference between page marks often differs, it is not possible to determine whether a specified page mark is close or far away, making it impossible to optimize the rewinding speed. There is also.

The present invention takes the above facts into account and performs positioning based on the overrun distance from the specified mark, thereby
It is an object of the present invention to provide a microfilm retrieval device that can quickly locate an image frame to which a designated mark has been attached to a predetermined position.

[Means to solve the problem]

The microfilm retrieval device according to the present invention includes a specifying means for specifying a retrieval target image frame recorded on a long microfilm, a transport means for transporting the microfilm, and a retrieval target image frame when the microfilm is transported. stop signal output means for detecting a mark attached to the image frame and outputting a stop signal to the transport means; and a stop signal output means for detecting a mark attached to the image frame and outputting a stop signal to the transport means; It has a calculation means for determining the amount, and a means for positioning the image frame to a predetermined position based on the conveyance amount determined by the calculation means.

[Effect]

According to the present invention, when a mark attached to a search target image frame is detected, a stop signal is output from the stop signal output means, and the conveyance means is stopped. However, the microfilm is not stopped immediately after the stop signal is output, and some overrun occurs. Here, the calculation means calculates the conveyance amount from when the mark corresponding to the search target image frame is detected until the conveyance is actually stopped, and moves the search target image frame to a predetermined position based on this conveyance amount. to position.

Thereby, the image frame to be searched can be quickly moved to a predetermined position.

Also, since positioning is performed based on the conveyance amount, for example,
When detecting marks added to a search target image by counting marks attached to image frames, even if the mark count is reset during an overrun, the marks will be counted again from 1. There is no need to redo the search, improving search efficiency.

〔Example〕

FIG. 1 shows a reader printer 10 according to this embodiment. In this league printer 10, a screen 16 for projecting an image recorded on a microfilm 14 is arranged on the front surface of the casing 12 (right side in FIG. 1). A cartridge 18 containing a layered layer of microfilm 14 is loaded into a loading section 20 provided slightly below the screen 16, and the tip of the microfilm 14 inside the cartridge 18 is placed inside the device. is wound onto a take-up reel 22. A light source 24 is installed between the cartridge 18 and the take-up reel 22 in correspondence with the microfilm 14. The light beam emitted from the light source 24 passes through image frames arranged along the optical axis, and is guided toward the screen 16 via an optical system composed of a lens 26 and a plurality of reflective mirrors 28. ing. As a result, microfilm 1
4 can be enlarged and projected.

Note that by changing the direction of reflection by the optical system (for example, by making the mirror 30 retractable along the optical axis as shown by the imaginary line in FIG. 1), the transmitted image can be transferred to a copying device installed below the device. 32. In the copy bag W32, the image recorded on the microfilm 14 can be enlarged and copied.

2A and 2B show details of the loading section 20. The cartridge 18 is mounted on its supply reel 34.
(hereinafter simply referred to as reel 34) is connected to a rotating shaft 42 of a supply motor 40 which is connected to a control device 38 via a torque control section 36. In addition, the supply motor 40
is rotated in the direction in which the microfilm 14t4 is scraped onto the reel 34 with a constant, weak torque (in the six directions of arrows in FIGS. 2(A) and 2(B)). The leading end of the microfilm 14 wound in layers on the reel 34 is pulled out from the opening 44 provided in the cartridge 18 by the driving force of the loading roller of the loading mechanism, and is wound around the guide roller 46.48. After that, it is wound onto the take-up reel 22. A microfilm 1 is placed near each of the guide rollers 46 and 48.
Film detection sensors 49 and 51 are arranged to detect the presence or absence of film.

The outer periphery of an endless conveyor belt 52 is in contact with the shaft 50 of the take-up reel 22 . This conveyor belt 52 has elasticity and is wound around guide rollers 54, 56, 58. Further, this conveyor belt 52 is connected to a drive reel 66 attached to a rotating shaft 64 of a take-up motor 62 which is connected to a control device 38 via a speed controller 60.
is wrapped around. Therefore, the conveyor belt 52 is moved in the direction of arrow B in FIGS. 2A and 2B and in the opposite direction in response to the rotation of the drive reel 66.

The microfilm 14 is transported between the conveyor belt 52 and the shaft 50.
It is held between the conveyor belt 52 and is wound onto the shaft 50 or pulled out from the shaft 50 in accordance with the movement of the conveyor belt 52.

A driven roller 68 is in contact with the conveyor belt 52 .

This driven roller 68 is attached to a rotating shaft 72 of an encoder 70, so that the driving state of the conveyor belt 52 can be detected as a pulse number by the encoder 7o. Encoder 70 is connected to control device 38 .

A slit plate 74 is provided between the guide roller 46 and the guide roller 48, slightly closer to the guide roller 46 than the optical axis. A pair of light receiving elements 76A and 76B are attached corresponding to the B channel. Corresponding to this light receiving element 76, an LED 78 is attached to the opposite side of the microfilm 14.
The structure is such that the light emitted from the LED 78 and transmitted through the microfilm 14 is received by the light receiving elements 76A and 76B. The light receiving elements 76A, 76B and the LED 78 are each connected to the control device 38.

As shown in FIG. 3, blip marks 80 are attached to both ends of the microfilm 14, and the light receiving element 7
The presence or absence of the blip mark 80 can be detected by the change in the amount of light received at 6.

The distance M between the light receiving element 76 and the optical axis is constant (75 mm in this embodiment).
After detecting the image frame 14A designated by , it can be moved to a position along the optical axis by moving it by a dimension M.

The blip marks 80 include a page mark 80P as described in the prior art section, and file marks 80F and block marks 80B as necessary, and classify a plurality of image frames 14A.

The control device 38 includes a CPU 82, a RAM 84, and an R○M 86.
, an input/output port 88, and a bus 90 such as a data bus or a control bus that connects these.

As shown in FIG. 6, the RAM 84 stores three types of speed patterns corresponding to overrun distances during positioning control of the microim 14. Therefore, during positioning control, one of these is selected and positioning control from the overrun position to a predetermined position is performed.

A keyboard 92 is connected to the input/output board 88 . The keyboard 92 is normally used to specify the image frame to be projected onto the screen 16, and by entering the number required for the microfilm 14 used among the block number, file number, and page number, Each mark is detected by a light receiving element 76 while the film 14 is being conveyed, and a designated image frame is searched for.

The operation of this embodiment will be explained below with reference to the flowchart of FIG.

First, the cartridge 18 is loaded. If it is determined in step 208 that it is loaded (for example, determined by the on/off state of a microswitch, etc.), step 21
0, the loading mechanism is activated, and the loading roller on the outer periphery of the microfilm 14 comes into contact with the microfilm 14 to pull out the tip. The pulled-out microfilm 14 passes through guide rollers 46, 48 to the winding wheel 22, and is held between the conveyor belt 52 and the shaft 50. As a result, the moving force of the conveyor belt 52 is transmitted to the microfilm 14, and the microfilm 14 is wound onto the shaft 50. When a predetermined amount of the microfilm 14 is wound around the shaft 50, the movement of the conveyor belt 52 is stopped and the apparatus is in a standby state.

Here, in step 212, an image frame is specified using the keyboard 92. For example, when inputting 3.2.10, the control device 38 recognizes that this is the 10th page of the image frame recorded in the 2nd file of the 3rd block, moves to step 214, and performs positioning control. Ru.

This positioning control will be described later.

In the next step 216, the loaded cartridge 18
It is determined whether or not the search has been completed. If the determination is negative, the process moves to step 212, and if no image frame is specified in step 212, steps 212 and 216 are repeated. If it is determined in step 216 that the process has ended, the process moves to step 218, where all the microfilms 14 are wound onto the cartridge 18, and the process ends.

Below, according to the flowchart of FIG.
The positioning control in step 14 will be explained.

First, in step 300, the take-up motor 62
(for example, forward rotation), and then in step 302, count numbers CB (=3) and CF (=2) of each mark are determined.
, CP (=10). When the take-up motor 62 rotates, the conveyor belt 52 is moved, and the microfilm 14 is taken up onto the shaft 50 at the same time. The light receiving element 76 uses an LED when the microfilm 14 is transported.
Each blip mark 80 passing between 78 and the light receiving elements 76A, 76B is counted.

In the next step 304, it is determined whether or not the block mark 80B has been detected.
6, it is determined whether a predetermined count number CB has been reached. Here, if the determination is negative, step 304
If the determination is affirmative, the process moves to step 308. In step 308, it is determined whether or not the file mark 80F has been detected, and at the time it is detected, the process moves to step 310, and it is determined whether or not a predetermined count number CF has been reached. Here, if the judgment is negative, step 3
08, and if a positive determination is made, step 312
Move to.

In step 312, the amount of travel of the microfilm 14 from the initial position (the number of pulses detected by the encoder 70)
Then, in step 314, it is determined whether or not page mark 80F is detected, and page mark 80F is detected.
When 0P is detected, the process moves to step 316, where the mark count number MC is incremented, and then, at step 318, the updated travel distance is calculated by adding the travel distance between the page marks 80P to the travel distance of the microfilm 14.

This updated travel distance is sequentially updated and stored in the RAM 84.

In step 320, a predetermined count number C1 and mark count number MC are compared to determine whether MC has reached C1. Here, if the judgment is negative, step 3
14, and continues detecting the page mark 80P.

If an affirmative determination is made in step 320, it is determined that the designated page mark 80P has been detected, and the process proceeds to step 322, where the transport of the microfilm 14 by the take-up motor 62 is stopped. At this point, positioning control changes from mark detection control to travel distance control.

Since the microfilm 14 is not stopped immediately after the drive of the take-up motor 62 is stopped, but is slightly overrun and stopped, in the next step 324, the traveling ffi LSTOP of the microfilm 14 up to this stop is read, and the process proceeds to step 326. Measure the amount of travel for overrun after transition. LS for VEIL? . , mustard.

Obtained by subtracting (Lov□"'LSTOPL
R).

In the next step 328, travel ff1L is calculated for the overrun. A conveyance speed pattern is set based on VER. In this embodiment, as shown in FIG. 6, there are three types of conveyance speed patterns, which are determined by the value of LOVER. In the next step 330, the microfilm 14 is conveyed according to the speed pattern set above, and the position where the travel amount is LR (position considering the dimension M)
to stop.

Thereby, the positioning of the designated frame on the optical axis is completed, and the image transmitted by the light source 24 can be projected onto the screen 16. For positioning from the overrun position to a predetermined position, it is preferable to rotate the take-up motor 62 in the reverse direction, pass the predetermined position by a certain amount, and then return to the predetermined position in a normal rotation state.

This is to minimize the tolerance of the drive system.

In this way, in this embodiment, when a predetermined mark is detected, the positioning control is changed to the travel distance, so even if the distance between the page marks 80P is different, the overrun position and the actual stop position can be determined. can recognize the distance between Therefore, since the conveyance speed can be determined according to the distance, positioning can be performed quickly and reliably, and the positioning work can be improved. Furthermore, even if the next file mark 80F is exceeded during overrun, since the distance is controlled, there is no need to detect the previous file mark again, and the time required for positioning can be shortened.

Note that in this embodiment, the case where there is a count number corresponding to a designated image frame has been described, but for example,
Travel amount control is also optimal in a case where 10 pages of the third file are specified even though the total number of pages in the third file is three. In other words, 1 of the 4th file
By changing the positioning control to "run when a page is detected", it is possible to position to the last page of the 3rd file or the first page of the 4th file without having to detect until the end of the microfilm 14 as in the conventional method. can be done. In this case, it is preferable to display that the specified image does not exist.

In addition, in this example, three types of speed patterns were set;
It may be further divided according to the overrun distance.

〔Effect of the invention〕

As explained above, the microfilm retrieval device according to the present invention can quickly move image frames with specified marks to predetermined positions by performing positioning based on the overrun distance from the specified mark. It has this excellent effect.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a reader printer according to this embodiment;
Figure 2 (A) is a perspective view of the vicinity of the cartridge loading section;
Figure (B) is a schematic block diagram of the vicinity of the cartridge loading section;
Figure 3 is a plan view showing an example of a microfilm with blip marks, Figure 4 is a control flow chart, and Figure 5 is a control flow chart.
The figure is a flowchart showing a speed control routine for image frame positioning, and FIG. 6 is a characteristic diagram showing the speed pattern. DESCRIPTION OF SYMBOLS 10... League printer, 14... Micro film, 38... Control device, 40... Supply motor, 52... Conveyance belt, 62... Take-up motor, 80... Blip mark, 80P...Page mark, 92...Keyboard.

Claims (1)

[Claims] (1) A specifying means for specifying a search target image frame recorded on a long microfilm, a transport means for transporting the microfilm, and a detecting mark attached to the search target image frame when the microfilm is transported. a stop signal output means for outputting a stop signal to the transport means, and a calculation means for calculating the transport amount from when the mark corresponding to the image frame to be searched is detected until the transport is actually stopped; A microfilm retrieval device comprising: positioning means for positioning an image frame at a predetermined position based on the conveyance amount determined by the calculation means.