JPH02264234A - Microfilm retrieval device - Google Patents

Abstract

PURPOSE:To retrieve an image frame speedily and accurately by conveying a microfilm at a speed slower than a specific conveying speed at a position which is a specific distance before a winding initial position determined according to stored position information. CONSTITUTION:A conveyor belt 52 is wound around a driving reel 66 fitted on the rotary shaft of a take-up motor 62 connected to a controller 38 through a speed control part 60. Then when an object image frame is retrieved while the microfilm 14 is taken up around a feeding side reel 34, a speed control means 60 controls the conveying speed according to the position information stored in a storage means 84. Namely, the conveying speed is reduced at the position which is the specific distance before the winding initial position. Consequently, the image frame can be retrieved speedily and accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a microfilm retrieval device that searches for an image frame based on a designated address while transporting a long microfilm.

[Prior art]

Generally, long microfilms are wound up in layers and stored on a supply reel within a cartridge. The cartridge can be loaded into the League Printer, which is a microfilm retrieval device. When the cartridge is loaded, the League Printer's auto-loading mechanism activates to retrieve the top layer of microfilm wound onto the take-up reel. is pulled out and wound onto the supply reel inside the league printer.

The optical axis position for projecting the image recorded on the microfilm is between the supply reel and the take-up reel.

Blip marks are attached to the microfilm near the image frames corresponding to each of the plurality of image frames recorded on the microfilm. Blip marks are attached to both ends of the microfilm in the width direction, and mark detection sensors are installed corresponding to the positions of both ends to detect the blip marks while transporting the microfilm. .

Here, the operator can specify the mark count etc. by inputting a predetermined numerical value manually from the keyboard. When the mark count number is specified, the microfilm is wound from the supply reel to the take-up reel or from the take-up reel to the supply reel, and the grip marks are sequentially counted as the microfilm is transported. Image frames can be searched. The transport speed of the microfilm during a search is variable, and normally the microfilm is transported at high speed until the blip mark corresponding to the image frame to be searched is detected.
When correcting the overrun after detection, positioning is performed by transporting at medium and low speeds. Thereby, it is possible to quickly search for a search target image frame and to perform positioning with high accuracy.

In the reader printer, when the retrieved image frame is positioned at the optical axis position for projection onto the screen, it is enlarged and projected. Furthermore, the projected image can be copied if necessary.

[Problem to be solved by the invention]

However, when searching for a specified image frame while winding microfilm from the take-up reel to the supply reel, if you search for the image frame to be searched at normal high speed,
When searching for the first frame and image frames located close to it, an overrun after the search may cause the leading edge of the microfilm to separate from the take-up reel and be completely wound onto the supply reel. In this case, the loading mechanism must be activated again. Therefore, there is a problem in that the search takes time and it is not possible to quickly search for the image frame to be searched.

The present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to provide a microfilm retrieval device that can quickly and accurately search for the first image frame recorded on a microfilm or an image frame located close to this.

[Means to solve the problem]

The microfilm retrieval device according to the present invention includes a supply reel for winding a long microfilm in layers, and a take-up reel for winding the microfilm pulled out from the supply reel in a layer. A microfilm retrieval device that controls the rotation of a supply reel and a take-up reel to transport the reel at a predetermined transport speed to search for image frames to be searched, and the microfilm is initially wound on the take-up reel. storage means for storing location information corresponding to the
When the microfilm is wound onto the supply reel, the winding is determined based on the position information stored in the storage means at a position a predetermined distance before the initial position and at a speed slower than the predetermined transport speed. and a speed control means for conveying the material.

[Effect]

According to the present invention, the storage means stores the position information of the initial position when the microfilm is wound onto the take-up reel. In this state, the microfilm is scanned at high speed in order to quickly search for image frames to be searched. Here, when retrieving the image frame to be searched while winding the microfilm onto the supply reel, the speed control means controls the general feed speed based on the position information stored in the storage means. That is, the conveyance speed is decelerated at a position a predetermined distance before the initial winding position to slow the conveyance speed. As a result, the leading edge of the microfilm is separated from the take-up reel due to overrun after the image frame to be searched is detected.
The microfilm can be stopped before it is completely wound onto the supply reel.

Therefore, even when retrieving the first image frame recorded on the microfilm or an image frame located close thereto while winding it onto the supply reel, the retrieval can be performed quickly and accurately.

〔Example〕

FIG. 1 shows a reader printer 10 according to this embodiment. In this reader 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 (take-up reel). A light source 24 is installed between the cartridge 18 and the winding wheel 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. Thereby, the image recorded on the microfilm 14 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. The copying device 32 can enlarge and copy the image recorded on the microfilm 14.

FIGS. 2A and 2B show details of the loading section 20. The cartridge 18 is connected to a rotation shaft 42 of a supply motor 400 whose reel 34 (supply reel) is connected to a control device 38 via a torque control section 36 . Note that the supply motor 40 is controlled by the torque control section 36.
Microfilm 1 is transferred to reel 34 with the specified torque.
4 (in the direction of arrow A in FIGS. 2(A) and 2(B)). The tip of the microfilm 14 wound in layers on the reel 34 is
It is pulled out from an opening 44 provided in the J-shaped screw 18 by the driving force of a loading roller of a loading mechanism (not shown), wound around guide rollers 46 and 48, and then wound onto the take-up reel 22. Guide roller 46.4
Film detection sensors 49 and 51 for detecting the presence or absence of the microfilm 14 are arranged near each of the microfilms 8 .

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, the conveyor belt 52 is wound around a drive reel 66 attached to a rotating shaft 64 of a take-up motor 62 connected to the control device 38 via a speed controller 60. Therefore, the conveyor belt 52 is moved in the direction of arrow B in FIGS. 2A and 2B and in the opposite direction in accordance with the rotation of the drive wheel 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 according to 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 an encoder 700 rotating shaft 72, and thereby the driving state of the conveyor belt 52 is determined by an encoder 70, which is connected to the 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 the light receiving elements 76A and 76B, an LED 78 is attached to the opposite side of the microfilm 14, and the light rays emitted from the LED 78 and transmitted through the microfilm 14 are received by the light receiving elements 76A and 76B. . Light receiving elements 76A, 76B and L
Each ED 78 is 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 elements 76A, 76B and the optical axis is constant (75 mm in this example). Therefore, after detecting the designated image frame 14A with the light-receiving elements 76A, 76B, the distance M is moved by the distance M. By doing so, positioning can be performed along the optical axis.

The blip mark 80 includes a page mark 80P.

Further, file marks 80F1 and block marks 80B are provided as necessary to classify the plurality of image frames 14A.

The control device 38 includes a CPU 82, a RAM 84, and a ROM 86.
, an input/output boat 88, and a bus 90 such as a luteta path and a control bus that connect these.

A keyboard 92 is connected to the input/output port 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, While conveying the film 14, the light receiving elements 76A, 7
6B to detect each mark and search for the designated image frame.

Further, the RAM 84 stores the number of stop pulses obtained by adding a predetermined number of pulses to the number of pulses read from the encoder 70 (initial number of pulses) immediately after the loading of the microfilm 14 is completed.

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

First, the microfilm 14 to be used is inspected, and a suitable mode from among pre-stored modes is input from the keyboard 92 (step 200). This results in
Proceeding to step 202, parameters corresponding to the manually input mode are read out from the RAM 84, and control is thereafter performed according to these parameters.

After a particular mode is set, first
Load 8. When it is determined in step 208 that the microfilm 14 has been loaded (for example, determined by the on/off state of a microswitch, etc.), the process moves to step 210, where the loading mechanism is activated and the outer circumferential loading roller of the microfilm 14 comes into contact with the microfilm 14. and pull out the tip. The pulled-out microfilm 14 passes through guide rollers 46, 48, reaches the winding wheel 22, and is connected to the conveyor belt 52 and shaft 50.
sandwiched between. As a result, microfilm 1
The moving force of the conveyor belt 52 is transmitted to the belt 4, and the belt 52 is wound onto the shaft 50. When a predetermined amount of the microfilm 14 has been wound onto the shaft 50, the movement of the conveyor belt 52 is stopped and the apparatus is in a standby state.

In the next step 211, the number of pulses at this stop position is read from the encoder 70 (initial pulse number), a predetermined number of pulses is added to this read value, and the result is stored in the RAM 84 as the number of stop pulses.

In this case, a predetermined number of pulses may be directly added to the read initial number of pulses, or the initial number of pulses may be reset (to 0).

Here, in the next step 212, an image frame is specified using the keyboard 92. For example, if you input 3.2.10, the control device 38 will tell you that this is the 10th page of the image frames recorded in the 2nd file of the 3rd block.
ift, and the process proceeds to step 214, where the take-up motor 62 is driven (for example, forward rotation). Next step 2
At step 15, the rotation direction of the take-up motor 62 is determined. In this case, since the rotation is normal, the process moves to step 216. If it is determined in step 215 that the rotation is reversed, the process moves to step 240, which will be described later.

When the take-up motor 62 rotates forward, the conveyor belt 52 is moved, and the microfilm 14 is wound onto the shaft 50 at the same time. In this case, the conveying speed is initially high as shown in FIG.

The light receiving elements 76A and 76B count each blip mark 80 that passes between the LED 78 and the light receiving element 76A176B when the microfilm 14 is transported. That is, in this case, the block mark 80B counts 3, the file mark 80F counts 2, and the page mark 80P counts.
is counted to 10, and it is determined in step 216 whether or not a predetermined mark has been detected. If the determination is affirmative, the process proceeds to step 217, where the drive of the take-up motor 62 is stopped, and then, in step 218, the positioning will be done. That is, the microfilm 14 is not stopped immediately after the drive of the take-up motor 62 is stopped, but is stopped after being slightly overrun.

When the microfilm 14 is completely stopped, the fifth
As shown in the figure, the take-up motor 62 is stopped by reverse rotation at a low speed. In this case as well, there is a slight overrun, and as shown in FIG. 5, the designated frame is further rotated forward at a low speed and stopped at a predetermined position (a position taking into account the dimension M in FIG. 2(B)). As a result, the positioning of the designated frame on the optical axis is completed, and the image transmitted by the light source 24 is transferred to the screen 1.
6 (step 219).

In the next step 232, it is determined whether or not to copy the projected image, and if the determination is affirmative, step 23
After the copying process is performed in step 3, the process moves to step 234.

Further, if a negative determination is made in step 232, step 233 is skipped and the process proceeds to step 234.

In the next step 234, the loaded cartridge 18
It is determined whether or not the search is completed.

If a negative determination is made in step 234, step 21
2, and if no image frame is specified in step 212, steps 212 and 234 are repeated. Furthermore, if it is determined in step 234 that the process has ended, step 23
6, all the microfilms 14 are wound onto the cartridge 18, and the process ends.

Here, in this embodiment, when retrieving an image frame by reversing the microfilm 14, and especially when searching for the first image frame of the microfilm 14 or an image frame close to this, the conveyance speed is controlled differently from the above. ing. This conveyance speed control will be explained below.

First, a certain amount of the microfilm 14 is placed on the take-up reel 22.
When the first image frame is specified in this state, the take-up motor 62 rotates in reverse at high speed (see Fig. 2 (A)).
), in the opposite direction of arrow B in (B)). Therefore, in step 215, the process moves to step 240, and the count residue in the encoder 70 is stored in the RAM 84 in step 211.
It is determined whether the number of stop pulses matches the number of stop pulses (the value obtained by adding a predetermined value to the initial number of pulses) stored in , and when they match, the conveying speed is switched to medium speed in step 241, and then the process moves to step 242. (See Figure 6). If they do not match, the process moves to step 216. Next, step 242
Then, it is determined whether or not the specified blip mark 80 has been detected, and when they match, the process moves to step 242 and the drive of the take-up motor 62 is stopped. Furthermore, if the number of pulses matches the initial pulse number before the specified blip mark 80 is detected, the drive of the take-up motor 62 is also stopped.

After stopping the take-up motor 62, step 2
46, the speed is further reduced to correct the overlap, and positioning is performed, and then the process moves to step 219.

In this way, the overrun distance after the drive is stopped can be reduced, the leading edge of the microfilm 14 is separated from the take-up reel 22, and there is no problem of having to operate the loading mechanism again, and the specified data can be quickly specified. Image frames can be searched.

In this embodiment, the initial pulse number is the position immediately after the loading by the loading mechanism is completed, but the initial position may be the first image frame or an image frame position close to the first image frame.

〔Effect of the invention〕

As explained above, the microfilm retrieval device according to the present invention has the excellent effect of being able to quickly and accurately retrieve the first image frame recorded on a microfilm or an image frame located close to this.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a league 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 grip marks, Figure 4 is a control flow chart, and Figure 5 is a control flow chart.
The figure is an explanatory diagram showing normal speed control for image frame positioning, and Figure 6 is an explanatory diagram showing speed control when retrieving an image frame near the first image frame while winding the microfilm onto the supply reel. be. DESCRIPTION OF SYMBOLS 10... League printer, 14... Microfilm, 38... Control device, 40... Supply motor, 62... Take-up motor.

Claims (1)

[Claims] (1) Equipped with a supply reel that winds a long microfilm in layers, and a take-up reel that winds the microfilm pulled out from the supply reel in layers, the microfilm is rolled between the supply reel and the take-up reel. A microfilm retrieval device that controls the rotation of a reel to transport the reel at a predetermined transport speed to search for a retrieval target image frame, and stores positional information corresponding to the initial stage of winding the microfilm onto a winding reel. a storage means, and a position a predetermined distance before the winding initial position determined based on the position information stored in the storage means at the time of winding and retrieval of the microfilm onto the supply reel, and from the predetermined transport speed. A microfilm retrieval device comprising: speed control means for transporting at a slow speed.