JP2543179B2 - Micro film search device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microfilm search apparatus that searches for an image frame based on a specified address while transporting a long microfilm.

[Prior art]

In general, the long microfilm is contained in layers on a supply-side reel in a cartridge. The cartridge can be loaded into the reader printer, which is a microfilm search device. When the cartridge is loaded, the autoloading mechanism operates in the reader printer, and the cartridge of the microfilm wound on the supply side reel is the maximum. The upper layer is pulled out and wound on the winding side reel in the reader printer.

A blip mark is provided near the image frame corresponding to each of the plurality of image frames recorded on the microfilm. The blip marks are respectively attached to both ends in the width direction of the microfilm. Mark detection sensors are respectively installed corresponding to the positions of the both ends to detect the blip marks while transporting the microfilm.

Here, the operator can specify a mark count number or the like by inputting a predetermined numerical value from the keyboard. When the mark count number is designated, the microfilm sequentially counts the blip marks according to the conveyance between the pair of reels, and can search for image frames.

In the reader printer, the searched image frame is positioned at the optical axis position for projecting the image frame on the screen, and is enlarged and projected. Further, the projected image can be copied as needed.

Here, in the conventional reader printer, in order to prevent the microfilm from being completely wound around the take-up side reel in the reader printer, the winding diameter of the microfilm on one of the reels is measured and this winding is performed. The conveyance of the microfilm is stopped when the diameter reaches a predetermined value. As a result, the microfilm is not entirely wound around the winding-side reel in the reader printer, and damage to the end can be prevented.

However, if the conveyance is forcibly stopped only by the winding diameter of the microfilm on the reel as described above, the conveyance may be stopped before the final image frame is detected, which is not preferable.

Therefore, the mark interval is determined based on the maximum interval size of marks attached to each image frame and the transport speed, and when the mark interval is elapsed, it is determined that the mark of the last image frame is detected, and the transport is stopped. It is thought to do. As a result, the final image frame and the image frames in the vicinity thereof can be surely searched.

[Problems to be Solved by the Invention]

However, when the conveyance of the microfilm is stopped after the mark of the final image frame is detected as described above,
If the margins between the final image frame and the trailing edge are small depending on the applied microfilm, the original purpose, that is, winding on the reel in the reader printer may occur. Further, even if the micro film is stopped by either of the above two means, when the winding diameter becomes equal to or less than a predetermined value or when the mark of the final image frame is detected, the micro film is applied. It is difficult to determine which means is suitable for, and the above problems cannot be solved by simply combining the two means.

In consideration of the above facts, an object of the present invention is to obtain a microfilm search device capable of appropriately carrying the microfilm and preventing damage to the microfilm.

[Means for solving the problem]

A microfilm retrieval apparatus according to the present invention includes a designating unit that designates a search target image frame recorded on a long microfilm, a transporting unit that transports the microfilm between a pair of reels at a predetermined transport speed, and a microfilm. A stop signal outputting means for detecting a mark attached to the image frame to be searched when the film is conveyed and outputting a stop signal to the conveying means; a conveying distance measuring means for measuring a distance for conveying the microfilm; Winding diameter measuring means for measuring the winding diameter of the microfilm wound on any one of the reels, and the conveying means when the winding diameter measured by the winding diameter measuring means reaches a predetermined value. To control the transport speed to be slower than the predetermined transport speed and to activate the stop signal output means when the mark is not detected by the predetermined distance, Transport control means for controlling the transport means based on the transport distance measured by the transport distance measuring means to transport the microfilm in a direction opposite to that at the time of searching, and positioning the final image frame or the previously designated image frame. have.

[Action]

According to the present invention, the winding diameter of one reel is measured by the winding diameter measuring means as the microfilm is conveyed. When the measured winding diameter reaches a predetermined value, the transport speed is first decelerated to be slower than the predetermined transport speed. As a result, even when searching for an image frame near the end of the microfilm, it is possible to reduce the overrun, and thus it is possible to prevent winding on one reel.

Next, at the time of transporting the microfilm, if the next mark is not detected even after transporting a predetermined distance from the last detected mark, the transport control means outputs a signal for stopping the transport of the microfilm. By doing so, the overrun of the microfilm after the output of the transport stop signal is minimized, so that the microfilm can be stopped before being wound, and damage to the microfilm can be prevented.

Further, after the conveying means stops the conveying at the end of the microfilm, the conveying control means conveys the microfilm in the direction opposite to the conveying direction based on the conveying distance from the last detected mark, and the final image frame is conveyed. Since the microfilm is finally stopped at the position such as, or the previous search position, the user can easily grasp the stop position.

[Embodiment] FIG. 1 shows a reader printer 10 according to this embodiment. The reader printer 10 has a casing 12
A screen 16 for projecting an image recorded on the microfilm 14 is arranged on the front surface (right side surface in FIG. 1). The cartridge 18 in which the microfilms 14 are wound in layers and accommodated is loaded in a loading section 20 provided slightly below the screen 16, and the tip of the microfilm 14 in the cartridge 18 is loaded inside the loading area. Take-up reel 22
It has been wound up on the (winding side reel). Cartridge 18
A light source 24 is installed between the take-up reel 22 and the take-up reel 22 so as to correspond to the microfilm 14. The light beam emitted from the light source 24 passes through an image frame arranged on the optical axis L, and is guided toward the screen 16 via an optical system including a lens 26 and a plurality of reflection mirrors 28. ing. As a result, the image recorded on the microfilm 14 can be enlarged and projected.

Incidentally, by changing the direction of reflection by the optical system (for example, the mirror 30 can be moved up and down on the optical axis L as shown by the imaginary line in FIG. 1), the transmitted image can be copied to the copying apparatus provided below the apparatus. You can be guided to 32. The copying device 32 can enlarge and copy the image recorded on the microfilm 14.

Details of the loading unit 20 are shown in FIGS. 2 (A) and 2 (B). The cartridge 18 has a reel 34 (supply reel) connected to a rotation shaft 42 of a supply motor 40 connected to a control device 38 via a torque control unit 36. In addition,
The supply motor 40 is rotated by the torque control unit 36 in a direction of winding the microfilm 14 onto the reel 34 at a predetermined torque (the direction of the arrow A in FIGS. 2A and 2B). The tip of the microfilm 14 wound in layers on the reel 34 has an opening formed in the cartridge 18
It is pulled out from 44 by the driving force of a loading roller of a loading mechanism (not shown), wound around the guide rollers 46 and 48, and then wound around the winding reel 22. Film detection sensors 49 and 51 for detecting the presence or absence of the microfilm 14 are arranged near the guide rollers 46 and 48, respectively.

The shaft 50 of the take-up reel 22 is in contact with the outer circumference of an endless conveyor belt 52. The conveyor belt 52 has an elastic force and is wound around the guide rollers 54, 56 and 58.
The conveyor belt 52 is wound around a drive reel 66 attached to a rotary shaft 64 of a tape up motor 62 connected to the control device 38 via a speed control unit 60. Therefore, the conveyor belt 52 is rotated by the second reel according to the rotation of the drive reel 66.
It is adapted to be moved in the arrow B direction of FIGS. (A) and (B) and the opposite direction.

The microfilm 14 is sandwiched between the transport belt 52 and the shaft 50, and the
It is adapted to be wound around 50 or pulled out from the shaft 50.

Here, in the vicinity of the reel 34, a winding diameter detection sensor 63 as a winding diameter measuring means is provided. This winding diameter detection sensor 63 is provided with an actuator 67 rotatable about a shaft 65, and its tip end is brought into contact with the outer periphery of the microfilm 14 wound around the reel 34 via a roller 69. There is. The actuator 67 is driven by a torsion coil spring (not shown) attached to the shaft 65, and the roller 69 at the tip of the actuator 67
Is urged in the direction of coming into contact with the outer periphery of the microfilm 14, whereby the microfilm 14 on the reel 34 is
The contact state is always maintained even if the winding diameter of is changed. The winding diameter detection sensor 63 reads the rotation angle of the actuator 67 and outputs a current value corresponding to the rotation angle to the control device 38.

A driven roller 68 is in contact with the conveyor belt 52. The driven roller 68 is attached to the rotary shaft 72 of the encoder 70, whereby the driving state of the conveyor belt 52 can be detected by the encoder 70 as a pulse number. The encoder 70 is connected to the control device 38.

A slit plate 74 is provided between the guide roller 46 and the guide roller 48 and slightly closer to the guide roller 46 than the optical axis L.
Are provided, and both ends of the microfilm 14 in the width direction (third
(The upper side of the figure is A channel and the lower side is B channel)
, A pair of light receiving elements 76A and 76B are attached. An LED 78 is mounted on the opposite side of the microfilm 14 corresponding to the light receiving elements 76A and 76B, and emits light emitted from the LED 78 and transmitted through the microfilm 14 to the light receiving element 76A.
It is configured to receive light at A and 76B. Light receiving element 76A, 76B
The LED 78 and the LED 78 are connected to the controller 38, respectively.

As shown in FIG. 3, a blip mark 80 is attached to both ends of the microfilm 14, and the presence or absence of the blip mark 80 can be detected by the change in the amount of light received by the light receiving element 76. .

The distance M between the light receiving elements 76A and 76B and the optical axis L is constant (75 mm in this embodiment).
After the image frame 14A specified by A and 76B is detected, the image frame 14A is moved by the dimension M, whereby the optical frame L can be positioned at the position of the optical axis L.

The blip mark 80 includes a page mark 80P, a file mark 80F, and a block mark 80B as required, and classifies the plurality of image frames 14A.

The control device 38 includes a CPU 82, a RAM 84, a ROM 86, an input / output port 8
8 and a bus 90 such as a data bus or a control bus for connecting them.

A keyboard 92 is connected to the input / output port 88. On the keyboard 92, the image frame to be projected on the screen 16 is usually designated, and the block number,
By inputting the required number to the microfilm 14 to be used among the file number and the page number, each mark is detected by the light receiving elements 76A and 76B while the microfilm 14 is being conveyed, and the designated image frame is displayed. It is supposed to search.

The RAM 84 stores a map indicating the relationship between the current value from the winding diameter detection sensor 63 and the winding diameter. Therefore, the control device 38 can obtain the winding diameter D of the microfilm 14 on the reel 34 from the input current value.

Further, the RAM 84 stores the minimum winding diameter D ₀ of the microfilm 14 wound around the reel 34. The CPU 82 is able to recognize the winding state of the microfilm 14 on the reel 34 by comparing with the stored minimum winding diameter D ₀ every time the winding diameter D is measured.

Further, in the control device 38, the encoder 70 measures the detection distance L between the page marks 80P and compares it with the maximum distance L ₀ stored in advance in the RAM 84. Here, the winding diameter D is smaller than the minimum winding diameter D ₀ and the detection distance L exceeds the maximum distance L ₀ only when the final image frame is detected during winding on the drive reel 66. Therefore, by this, it is possible to recognize that it is the page mark 80P of the final image frame.

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

First, the microfilm 14 to be used is inspected, and a suitable mode among the modes stored in advance is input from the keyboard 92 (step 200). As a result, the process proceeds to step 202, where the parameter corresponding to the input mode is read out from the RAM 84, and the control corresponding to this parameter is performed thereafter.

After the specific mode has been set,
Load 18 When it is determined in step 208 that it has been loaded (for example, it is determined in the on / off state of the micro switch, etc.), the process proceeds to step 210, where the loading mechanism operates, and the loading roller is placed on the outer periphery of the microfilm 14. Contact and pull out the tip. The pulled-out microfilm 14 reaches the take-up reel 22 via the guide rollers 46 and 48, and is sandwiched 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 is wound around the shaft 50. When the microfilm 14 is wound around the shaft 50 by a predetermined amount, the movement of the conveyor belt 52 is stopped and the stand-by state is set.

Here, in step 212, an image frame is designated by the keyboard 92. For example, if you enter 3, 2, 10,
The controller 38 recognizes that it is the tenth page of the image frame recorded in the second file of the third block, and
In step 214, the take-up motor 62 is driven (for example, normal rotation). When the take-up motor 62 rotates, the transport belt 52 is moved, and the microfilm 14 is
It is wound up to 50. In this case, the transport speed is initially high as shown in FIG.

In the next step 215, it is judged whether or not the flag is set, and if a negative judgment is made, the process proceeds to step 216 to fetch the winding diameter D obtained based on the current value from the winding diameter detecting means. . Then, at step 217, this winding diameter D
And the minimum winding diameter D ₀ stored in the RAM 84 in advance. Here, if D ≧ D ₀ , it is determined that the winding diameter D has not reached the minimum winding diameter D _0, and the process proceeds to step 218. Also,
If an affirmative determination is made in step 215, that is, if the flag F is set, the process proceeds to step 218.

If it is determined that D <D ₀ in step 217,
The winding diameter D of the microfilm 14 on the reel 34 is the minimum winding diameter D _0.
It is judged that the value is lower than the above value, the process proceeds to step 219, and the conveying speed is set to the medium speed (see the solid line in FIG. 5). The determination of D <D ₀ means that the microfilm 14 has been wound onto the take-up reel 22 and has come close to the end.

After setting the transport speed to medium speed in step 219, proceed to step 2
Go to step 20. After setting the flag F, go to step 218.

The light receiving elements 76A and 76B count each of the blip marks 80 passing between the LED 78 and the light receiving elements 76A and 76B when the microfilm 14 is conveyed. In step 218, it is determined whether or not a mark is detected, and if a positive determination is made, the process moves to step 222, the counter of the encoder 70 is reset and started, and then the mark detected in step 224 becomes the designated image frame. It is determined whether or not the mark is the corresponding mark. That is, in this case, set the block mark 80B to 3
By counting 2 counts of the file mark 80F and 10 counts of the page mark 80P, the mark corresponding to the designated image frame can be detected. Step 224
If it is determined that the mark corresponds to the specified image frame in,
The process proceeds to step 226 and the drive of the take-up motor 62 is stopped. If a negative determination is made in step 224, the process proceeds to step 215.

After the drive of the take-up motor 62 is stopped, the process moves to step 228 for positioning. That is, the microfilm 14 is not stopped immediately after the drive of the take-up motor 62 is stopped, but is slightly overrun and stopped.
When the microfilm 14 is completely stopped, the take-up motor 62 is stopped at a low speed by reverse rotation as shown by the alternate long and short dash line in FIG. In this case as well, a slight overrun occurs, and as shown by the alternate long and short dash line in FIG. 5, the normal rotation is further performed at a lower speed to stop the designated frame at a predetermined position (a position in consideration of the dimension M in FIG. 2B). By this, the positioning of the designated frame on the optical axis L is completed, and the transmission image by the light source 24 can be projected on the screen 16 (step 23).
0).

Here, if a negative determination is made in step 218,
After shifting to step 232 and reading the current distance L of the counter of the encoder 70, this distance L is compared with the maximum distance L ₀ stored in advance in the RAM 84 in step 234.
If L <L ₀ is determined in step 234, the light receiving element 76
It is judged that the final image frame has not passed over A and 76B,
Move to step 215. If L ≧ L ₀ is determined in step 234, it is determined that the final image frame has passed on the light receiving elements 76A and 76B, the process proceeds to step 236, the drive of the takeup motor 62 is stopped, and At step 238, the final image frame is positioned at the optical axis L position (see the solid line in FIG. 5), and the process proceeds to step 230. In this case, since the conveying speed is set to the medium speed, the overrun of the microfilm 14 after the drive of the take-up motor is stopped is small, the rear side end of the microfilm 14 in the conveying direction is separated from the reel 34, and the take-up reel 22 There is no such thing as winding up.

After projecting the image in step 230, the process proceeds to step 240, and it is determined whether or not the projected image is to be copied. If a positive determination is made, the copying process is performed in step 242, and then the step is performed. Move to 244. Also, step 240
If a negative decision is made in step 242, step 242 jumps over to step 244.

At the next step 244, it is determined whether or not the search in the loaded cartridge 18 has been completed. If a negative determination is made in step 244, the process proceeds to step 246, the flag F is reset, and then the process proceeds to step 212.
If no image frame is specified in step, steps 212, 244, 24
Repeat 6 If it is determined in step 244 that the process is finished, the process proceeds to step 248, and all the microfilms 14 are wound around the cartridge 18 and the process is finished.

As described above, in the present embodiment, the microfilm 14 is gradually taken up by the take-up reel 22, and when the end of the microfilm 14 is approached, the transport speed is slowed down, and the overrun distance after the detection of the image frame near the end is reduced. The length can be shortened, and the inconvenience of winding the microfilm 14 around the take-up reel 22 can be prevented. Also, since it is possible to recognize that the final image frame has passed over the light receiving elements 76A and 76B, in this case, it is determined that the specified image frame does not exist, and it is forcibly positioned to the final image frame. ,
It is possible to prevent winding of the take-up reel 22.

In this embodiment, when the designated image frame does not exist, the final image frame is positioned on the optical axis L, but the previously designated image frame may be positioned.

Further, in this embodiment, the winding diameter detection sensor 63 is installed on the reel 34 side, but it is installed on the winding reel 22 side.
The winding diameter of the microfilm 14 to be wound into may be obtained.

Further, in the present embodiment, as the winding diameter measuring means, so-called mechanical measurement is performed.
Other winding diameter measuring means may be applied, such as a calculation based on the feed amount of the micro film 14, or a determination based on the feed amount of the microfilm 14 per one rotation of the reel 34.

〔The invention's effect〕

As described above, the microfilm retrieval apparatus according to the present invention can properly convey the microfilm and prevent the microfilm from being damaged.
Further, when the microfilm is conveyed beyond the final image frame, the stop position can be easily grasped by positioning the microfilm at the final image frame or the previous search position.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a reader printer according to the present embodiment,
FIG. 2 (A) is a perspective view of the vicinity of the cartridge loading section,
Figure (B) is a schematic block diagram near the cartridge loading section,
FIG. 3 is a plan view showing an example of a microfilm having a blip mark, FIG. 4 is a control flow chart, and FIG.
FIG. 3 is an explanatory diagram showing speed control for image frame positioning. 10 …… Reader printer, 14 …… Micro film, 38 …… Control device, 62 …… Take up motor, 63 …… Roll diameter detection sensor.

Claims (1)

(57) [Claims] 1. A designating means for designating image frames to be searched recorded on a long microfilm, a transporting means for transporting the microfilm between a pair of reels at a predetermined transport speed, and a transporting means for transporting the microfilm. Any one of the pair of reels, a stop signal output unit that detects a mark attached to the image frame to be searched and outputs a stop signal to the transport unit, a transport distance measurement unit that measures a distance at which the microfilm is transported, Winding diameter measuring means for measuring the winding diameter of the microfilm wound on one reel, and controlling the feeding means when the winding diameter measured by the winding diameter measuring means reaches a predetermined value. When the speed is slower than the predetermined conveying speed and the mark is not detected by the predetermined distance, the stop signal output means is operated to measure the conveyance distance measuring means. By controlling the conveying means on the basis of the transfer distance is conveying the microfilm when searching the opposite direction, microfilm search device comprising: a conveyance control means for positioning the last image frame or previous designated image frame, a.