JPH06273854A - Microfilm, photographing device for microfilm, and microfilm retrieving device - Google Patents

Abstract

PURPOSE:To provide the microfilm on which retrieving information is imprinted in order to prevent read error caused by dust, etc., to provide the photographing device for the microfilm used in the case of performing photographing to the microfilm; furthermore, to provide the microfilm retrieving device used in the case of retrieving the microfilm. CONSTITUTION:As to the microfilm F; the same kinds of retrieving information(blip M, IMC, etc.) are imprinted on both A and B channels 9a and 9b. The retrieving information is imprinted by controlling first and second retrieving information imprinting mechanisms on the photographing device for the microfilm. As to the microfilm retrieving device; a CPU as a judging means judges that the blip M, etc., are detected when information read by each mark reading sensor is coincident.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microfilm on which image information and search information of an original are imprinted, a microfilm photographing device for imprinting image information and search information on the microfilm, and a microfilm. The present invention relates to a microfilm search device used to search for.

[0002]

2. Description of the Related Art On a microfilm on which an image recorded on a document such as a document or a document is imprinted, in addition to the above-mentioned image information, it is possible to arrange and retrieve the imprinted image information easily. Various search information is additionally printed. The additional search information includes a document mark also called a blip and an IMC (Image Management Code). The blip is a mark printed on the edge of the film corresponding to each image frame, and is used to count the number of image frames when searching for image information. The IMC is a mark imprinted on the leading portion of the microfilm. The number of the cartridge in which the microfilm is stored and held, and the type of blip (1 level, 2 levels or 3 levels, simplex or duo). Or duplex etc.)
Is used to represent, etc.

The blip is imprinted at a side portion in the width direction of the film, that is, at a vertical position of the image frame. Similarly, the IMC is also imprinted on the side portion in the width direction of the film at the leading portion of the film.

[0004]

However, when a blip projected on only one side in the width direction of the film is detected and image information is searched for, if dust or the like adheres to the film, There is a risk that the dust may be mistakenly read as a blip and the number of image frames may be counted. Even if the microfilm has different types of blips imprinted on both sides in the width direction of the film, each blip imprinted on both sides is detected separately, so the same problem occurs. Can happen. Further, when the IMC is detected, similarly, there is a possibility that a reading error may occur due to dust or the like attached to the film. If the blip and IMC cannot be accurately detected, there is a problem in that a search error of image information is caused, and a quick search or copying of the microfilm cannot be performed.

Therefore, a first object of the present invention is to provide a microfilm on which search information is imprinted so as to prevent a reading error caused by dust or the like, and a second object of the present invention. A third object of the present invention is to provide a microfilm retrieval device used when retrieving this microfilm. To do.

[0006]

According to the present invention for achieving the first object, the same search information is printed on both sides in the width direction of the microfilm in the microfilm on which the image information of the original is printed. It is a microfilm characterized by being embedded.

The present invention that achieves the above second object is such that, in a microfilm photographing apparatus for copying image information of an original on a microfilm, search information is printed on each of both sides in the width direction of the microfilm. And a second search information imprinting mechanism, and control means for controlling the first and second search information imprinting mechanisms so that the same search information is imprinted on each of the both side portions. It is a micro film photographing device.

The present invention which achieves the above-mentioned third object is a microfilm retrieval apparatus for retrieving a desired image from a plurality of image information by reading the retrieval information imprinted on the microfilm. First information reading means for reading one search information among the search information imprinted on both sides in the width direction of,
Second information reading means for reading the other search information; information read by the first information reading means;
And a determination unit that determines that the search information has been detected when the information read by the information reading unit is matched.

[0009]

In the microfilm photographing apparatus, by controlling the first and second retrieval information imprinting mechanisms by the control means, the same retrieval information is imprinted on both side portions in the width direction of the microfilm.

In the microfilm retrieval apparatus for retrieving a desired image from the image information imprinted on the microfilm, it is judged whether or not the information read by the first and second information reading means is the same. Judged by means,
When they match, it is determined that the search information has been detected. Therefore, even if dust or the like is attached to the film, it is not detected as search information.

[0011]

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing a part of a microfilm according to an embodiment of the present invention. The microfilm F is made of a strip-shaped roll film, and an image recorded on an original is imprinted by a microfilm photographing device described later, and a blip M as search information corresponding to each image information imprinted. Is imprinted. In the figure, reference numeral "Bd" indicates double size image information, and reference numeral "Bs" indicates single size image information. When the image information or the search information is imprinted on the microfilm F, the film F is conveyed in the direction indicated by the arrow.

The microfilm F has a document mark channel 9a (hereinafter referred to as A channel) located between the upper edge of the film F and the upper edges of the images Bd and Bs in the state shown in FIG. A document mark channel 9b (hereinafter referred to as B channel) located between the lower edge of F and the lower edge of the images Bd and Bs is provided. A blip M is imprinted on each of the channels 9a and 9b, that is, on both sides of the microfilm F in the width direction. The illustrated blip M has three types of blips M1 of different sizes,
M2 and M3 are three-level blips which are selectively imprinted. The blip M1 is a mark having the shortest mark length along the longitudinal direction of the film F.
3 is the mark having the longest mark length, and the blip M2 is a mark having a mark length about the middle of the lengths of the blips M1 and M3. The mark width along the width direction of the film F is the same for each blip M1, M2, M3.

In this microfilm F, the blip M of the same type having the same size is imprinted on each of the A channel 9a and the B channel 9b for one image information. Further, the blip M of each of the A and B channels 9a and 9b relating to one image information is
It is imprinted at the same position along the longitudinal direction of the film. For example, in the illustrated example, the tips of the blip M attached to the A channel 9a, the tips of the blip M attached to the B channel 9b, and the tips of the image information Bd and Bs match so that the channels 9a and 9b of the A and B channels are the same. Blip M is imprinted on each of.

In the microfilm F to which the IMC as the search information is attached, although not shown, the IMC is imprinted in the same manner as the case of the blip M described above. That is, in the leading portion of the film F, the same type of I
MC is imprinted at the same position along the longitudinal direction of the film.

The position of the blip M is not limited to the position shown in FIG. 1, and the tip of the blip M may be offset from the tip of the image and imprinted. The blips M printed on the A and B channels 9a and 9b need only be of the same type, and do not necessarily have to be printed at the same location along the longitudinal direction of the film. For example, the tip of the blip M attached to the A channel 9a coincides with the tips of the image information Bd and Bs, and the B channel 9a
The tip of the blip M attached to b is image information Bd, B
It may be slightly displaced from the tip of s. In addition, each IMC
Alternatively, it may be imprinted with a slight shift along the longitudinal direction of the film.

Next, a microfilm photographing device for imprinting image information and search information on the microfilm F will be described. FIG. 2 is a diagram showing the entire microfilm photographing apparatus according to the present invention, in which a document holding glass 11 is provided on a base 10 forming a document table, and a sheet-like document is incorporated under the glass 11. The document is transported along the lower surface of the glass 11 by a document transport device (not shown). A DF insertion opening 12 is formed in the upper right portion of the base 10, and the manuscripts fed by hand one by one to a supporting base 13 attached adjacent to the insertion opening 12 extend to the lower side of the glass 11. The document is conveyed by the document conveying device. Also, below the insertion opening 12 is A
A support table 15 having a DF insertion opening 14 is provided, and sheet-like originals stacked in the support table 15 are automatically conveyed one by one from the top along the lower surface of the glass 11. However, it is also possible to place the original directly on the glass 11 and imprint the image information recorded on the original.

A pillar 16 is erected at the center of the rear part of the base 10, and a holder 18 is attached to the pillar 16 via a beam 17 fixed to the tip of the pillar 16.
A camera head 20 is attached to 8. The operation panel 19a is provided on the front part of the base 10 and the operation panel 19a is provided on the rear part of the base 10.
19b is installed.

Documents manually inserted one by one into the DF insertion port 12 and conveyed to the lower side of the glass 11 by the document conveying device, and stacked on the support table 15 and conveyed one by one to the ADF by the conveying device. The originals conveyed from the insertion opening 14 to the lower side of the glass 11 are positioned so that their corners are located at the positions indicated by the reference signs X and Y in FIG. As a result, so-called corner alignment of the document is performed. This corner alignment is the same when the original is placed directly on the glass 11, and the image is imprinted with the corners of the original aligned with the reference positions X and Y. According to the size of the document thus positioned, the camera head 20 together with the holder 18 is tilted in the front-rear direction and the left-right direction so that the entire image recorded on the document can be photographed. It is designed to move up and down toward the corner.

An arm 22 having an illuminator 21 is attached to each of the columns 16, and a light source is built in each illuminator 21.
The light from 1 illuminates the glass 11.

FIG. 3 is a view showing a film feeding device incorporated in the camera head 20 shown in FIG. A film chamber 25 is formed inside the camera head 20, and a supply shaft 26 and a winding shaft 27 are provided so as to project into the film chamber 25. The supply shaft 26 is loaded with a supply reel, that is, a supply-side reel 28, and the winding shaft 27 is loaded with a take-up reel, that is, a winding-side reel 29. .

Case 2 constituting the camera head 20
An opening 32 for transmitting light that has passed through a lens 31 attached to the camera head 20 is provided in the partition wall 30 of 0a.
A fixing plate 34 having an opening 33 formed at a position corresponding to the opening 32 is attached to the inner surface of the partition wall 30. In addition, the fixed plate 34 includes a movable plate 3
5 (aperture switching plate) is provided so as to be openable and closable around the shaft 35a, and the opening area of the aperture formed by the opening 33 is changed into two types, large and small, by opening and closing the movable plate 35. If the document to be imprinted is a small size such as A4, the movable plate 35 is closed to set the aperture opening area to a half size, and the image of a large size document such as A3 is imprinted at the same reduction ratio. In this case, the opening area of the aperture formed by the opening 33 is set to the same full size as the opening 32 by opening the movable plate 35.

A microfilm F which is unwound from the supply-side reel 28 and wound on the winding-side reel 29.
In order to approach the fixed plate 34 and the movable plate 35,
A crimping plate 36 is provided inside the camera head 20. In order to guide the microfilm F to the lower side of the pressure bonding plate 36, a guide roller 40 is mounted below the supply reel 28 so as to be freely rotatable. Further, in order to regulate the moving position of the microfilm F that has passed through the guide roller 40, and to feed the microfilm F, a metal feed roller 41 is mounted below the take-up reel 29. ing. This feeding roller 41
Is connected to a stepping motor 37 (see FIG. 4) which is driven and controlled by a pulse current, and the rotation of the feeding roller 41 by the stepping motor 37 sets the transport amount of the film F.

A film F is attached to the guide roller 40.
A guide roller 42 is provided adjacent to the guide roller 40 in order to closely contact the sheet feeding roller 41,
A guide roller 43 is provided adjacent to the feeding roller 41 in order to bring the film F into close contact.
The guide roller 42 can be pressed and released from the guide roller 40 in order to facilitate the loading operation when loading the microfilm F on the camera head 20. The guide roller 42 releases the pressure contact and the guide roller 4
When the guide roller 42 is separated from 0, the guide roller 42 is in the position shown by an imaginary line in FIG. Similarly, the guide roller 4
3 is also capable of pressure contact and pressure contact release, and the state where pressure contact is released is shown by a virtual line.

As described above, the film F is conveyed by the rotation of the feeding roller 41, but the feeding roller 4
In order to reliably wind the film F unwound from between 1 and the guide roller 43 on the winding side reel 29, a weak torque is applied to the winding side reel 29 in the direction indicated by the arrow. Further, in order to prevent the slack of the film F fed from the supply-side reel 28, a weak braking force or frictional force is applied to the supply-side reel 28 in the direction indicated by the arrow.

When the image recorded on the original is printed on the microfilm F, the movable plate 35 is moved according to the size of the original.
Is opened and closed, and the aperture area of the aperture is set to half size or full size. When imprinting an image recorded on a double-sized original, the movable plate 35 is opened as shown in FIG. After the imprinting is completed, the microfilm F is conveyed by the rotation of the feeding roller 41. This carrying amount is the total size of the size of the image information Bd in the carrying direction and the gap between the image information. When the image recorded on the single size original is imprinted after the image recorded on the double size original is imprinted, the opening / closing shaft 35 of the movable plate 35 is used.
a is located in front of the film F in the transport direction, and when the movable plate 35 is closed, the tip of the movable plate 35 is aligned with the center of the optical axis. , Double size image information B as it is
It becomes possible to imprint single-size image information Bs corresponding to a single-size document adjacent to d.

FIG. 4 shows blips M and I as search information.
FIG. 11 is a diagram showing a retrieval information imprinting device incorporated in the camera head 20 of the microfilm photographing device in order to imprint MC and the like on both sides in the width direction of the microfilm F.

This retrieval information imprinting apparatus has a first retrieval information imprinting mechanism 54a for imprinting retrieval information on the A channel 9a of the microfilm F and a second retrieval information imprinting mechanism 54a for imprinting the retrieval information on the B channel 9b. And a search information imprinting mechanism 54b. Also, both A and B channels 9
The first and second search information imprinting mechanisms 54a and 54b so that the same search information is imprinted on each of a and 9b.
It has a control means for controlling.

First and second retrieval information imprinting mechanism 54
LEDs 50a and 50b are provided on a and 54b, respectively. Each of the LEDs 50a, 50b emits a slit light of a minimum unit having a shorter length than the search information having the minimum length along the transport direction of the film F among the plurality of types of search information imaged on the microfilm F. Is set to. In order to expose the slit light to both side portions of the film F in the width direction, that is, both the A and B channels 9a and 9b, at the position downstream of the aperture in the transport direction of the film F, the light transmitting hole 51a, 51 b is formed on the fixed plate 34. Mirrors 52a and 52b installed below the light transmitting holes 51a and 51b and the LED 50a,
Lenses 53a and 53b are installed between the lenses and 50b. The light transmitting holes 51a and 51b are formed at the same distance from the aperture, that is, at the same position along the transport direction of the film F. In addition, LED5
0a and 50b are synchronized by the control means and are turned on and off at the same timing. Instead of turning on and off the LEDs 50a and 50b themselves, a shutter that blocks the light from the LEDs 50a and 50b may be provided, and the shutters may be operated by the control means at the same timing in synchronization. The reference numeral 37 in FIG. 4 indicates a stepping motor for rotating the feeding roller 41 to convey the film F.

Imprinting of the search information on the microfilm F is achieved by controlling the exposure time by the LEDs 50a and 50b while feeding the film F by the feeding roller 41. The exposure time by the LEDs 50a, 50b is determined according to the length of the search information to be imprinted. If the exposure time is short, the search information having a short length is imprinted, and conversely, if the exposure time is long, the exposure time is long. The long search information will be imprinted. The exposure time can be determined by changing the transport speed of the film F while keeping the lighting time of the LEDs 50a and 50b constant, but in the illustrated embodiment, the transport speed of the film F is constant and the LEDs 50a and 50b are fixed. Is determined by changing the time during which the light is continuously turned on or emitted.

The imprinting operation of the blip M as the retrieval information is started after the image of the original document is imprinted on the film F and after the film F is conveyed by a predetermined stroke. However, it is also possible in principle to imprint the blip M before the image is imprinted.
Since the IMC as the search information is attached to the leading portion of the film F, the IMC imprinting operation is performed before the image of the document is imprinted.

FIG. 5 is a schematic block diagram showing a control system for imprinting image information and search information on the microfilm F by the above-mentioned microfilm photographing device.

In the CPU 55 as the control means, the photographing switch 56 for starting the imprinting of an image or the like on the microfilm F and the original on which the image is imprinted are the single size or the double size. And a shooting size instruction switch 57 for inputting either of them. Further, a document mark instruction switch 58 for inputting whether or not to imprint the blip M and, if imprinting, which of the three types of blips M to imprint, and whether or not to imprint the IMC. IM to enter which code to imprint in the case
The C instruction switch 59 is connected to the CPU 55. These switches 56, 58, 59 are provided on the operation panels 19a, 19b shown in FIG. 2, and signals corresponding to the operations are input to the CPU 55. Also,
The signal from the size detection sensor 60 that is provided in the document conveyance device and detects the size of the sheet-like document conveyed is also C
It is input to the PU 55.

On the other hand, from the CPU 55, a zooming mechanism 61 for vertically moving the camera head 20 together with the holder 18 in order to capture an image at a predetermined reduction ratio corresponding to the size of the original, and a photographing size for opening and closing the movable plate 35. A switching mechanism 62, a film crimping mechanism 63 that crimps the film F to the fixing plate 34 while the image is imprinted by operating the crimping plate 36, and the opening time of the photographing shutter according to the illuminance on the document table 10. A control signal is sent to the photographing shutter operation mechanism 64 that controls the. Also,
The rotation control of the pulse motor 37 that drives the feeding roller 41 to convey the film F, and the blip M and IMC.
The blinking control of the LEDs 50a and 50b for imprinting
This is performed by the CPU 55.

FIG. 6 is a time chart showing the exposure timing of the LEDs 50a and 50b when the blip M as the retrieval information is imprinted. When the image of the original is imprinted on the film F, the pressure plate 36 is placed on the film F. It is performed by opening and closing a shutter (not shown) incorporated in the camera head 20 under the pressure-bonded state. At this time, the feeding roller 41 is stopped and the film F is not conveyed.

When the imprinting of the image information is completed, the pressure bonding plate 36 releases the pressure bonding to the film F, and the feed motor 41 is rotated by the pulse motor 37 to convey the film F. When the front end portion of the image information Bd (Bs) imaged on the film F comes to the positions of the light transmitting holes 51a and 51b as the film F is conveyed, the LED 50a is turned on at the timing indicated by the symbol "a" in FIG. , 50
Both b are turned on and exposure is started. The film F is transported at a constant speed during the exposure. LED5
The exposure time of 0a and 50b is preset according to the length of the blip M printed on the film F. L
When the exposure time by the EDs 50a and 50b is t1 until the timing indicated by the symbol "b", the minimum length blip M1 in FIG.
It is imprinted on each of a and 9b. Similarly, if the exposure time is t2 up to the timing indicated by the code “c”, the blip M2 of the intermediate length is imprinted, and if the exposure time is t3 up to the timing indicated by the code “d”, the maximum length is obtained. Sano Blip M3 will be imprinted.

Since the LEDs 50a and 50b are turned on and off at the same timing in synchronization with each other, as in the microfilm F shown in FIG.
The blips M1 (M2, M3) of the same size are easily imprinted on a and 9b at the same position along the longitudinal direction of the film.

The transfer of the film F is continued even after the blip M is imprinted, and the pulse motor 37 is stopped at the timing indicated by the symbol "e" to complete the transfer of the film F. Next, the pressure plate 36 is pressure-bonded to the film F,
The image of the next original is imprinted.

L for imprinting IMC as search information
Although the exposure timings of the EDs 50a and 50b are not shown in the drawing, the LE timings are the same as in the case where the blip M is printed.
By turning on and off the D50a and 50b in synchronization with each other at the same timing, the IMC of the same type is copied to the channels 9a and 9b of the A and B in the leading portion of the microfilm F at the same position along the longitudinal direction of the film. Will be crowded.

The LEDs 50a and 50b are individually controlled to be turned on and off without being synchronized with each other, so that the blips M of the same type are imprinted on the A and B channels 9a and 9b at different positions along the longitudinal direction of the film. , A and B channels 9a and 9b can be imprinted with different types of blips M. Furthermore, both LEDs 50a, 5
Blip M only on the B channel 9b side by turning on only one of the LEDs 0b, for example, the LED 50b.
You can also imprint. Further, when the same type of search information is imprinted on both side portions in the width direction of the film F with some deviation along the film longitudinal direction, the LEDs 50a and 50b are turned on and off at the same timing in synchronization. If so, the light-transmitting holes 51a and 51b may be arranged so as to be offset so as to correspond to the shift between the search information.

Next, a microfilm retrieval device used for retrieving the microfilm F shown in FIG. 1 in which the same type of blip M is imprinted on the A and B channels 9a and 9b will be described.

FIG. 7 is a diagram showing a reader printer to which the microfilm retrieval device of the present invention is applied. A screen 71 is provided on the front surface of the reader printer main body 70.
The image recorded on the microfilm F is projected on the screen 71. The microfilm F is loaded in a roll film carrier 72 provided below the screen 71. The image of the microfilm F is projected on the screen 71, read and searched, and the searched predetermined film is searched. A known electrophotographic printer unit (not shown) is incorporated in the reader printer body 70 in order to copy the image. This copying machine has a photosensitive drum as an image receiver. In order to operate this reader printer, a search board 73 that is mainly operated when the microfilm F is fed is connected to the reader printer main body 70, and when a predetermined image is searched, it is operated when the image is copied. The copy board 74 is provided on the front surface of the reader / printer main body 70.

The roll film carrier 72 shown in FIG.
The internal structure of is shown in FIG. As illustrated, the microfilm F is wound around a supply reel 75 in a roll shape, and the supply reel 75 is a cartridge 76.
It is removably supported and is freely rotatable. The cartridge 76 can be inserted through an opening (not shown) provided at the left end of the roll film carrier 72. The microfilm F fed from the supply reel 75 in the cartridge 76 is the roll film carrier 72. It is adapted to be wound up on a winding reel 77 provided inside.

The supply reel 75 drives the film F by a drive shaft 78 driven by a supply reel drive motor MR.
The drive shaft 78 can be rotated in the forward and reverse directions, and the drive shaft 78 is operated by the cartridge 76 when the cartridge 76 is loaded into the roll film carrier 72 from the insertion opening. The solenoid operates to move forward toward the core portion provided at the center of the supply reel 75. The take-up reel 77 is rotated by a drive shaft 79 connected to the take-up reel driving motor MF.

Further, in the roll film carrier 72, a delivery roller 80 driven by a motor (not shown) for transporting the leading end of the microfilm F fed from the cartridge 76 toward the take-up reel 77. , A guide roller 81 for guiding the film sent out from here, and further an encoder 82 for counting the conveying distance of the microfilm F in both forward and backward directions, and an auxiliary roller 83 in pressure contact therewith. ing. In the roll film carrier 72, the guide roller 8 located at the same level as the encoder 82.
4 are provided. In order to guide the microfilm F fed from the supply reel 75 in the cartridge 76 to the take-up reel 77, a plurality of guides 85 are provided between them, and the guides 85 allow the film transport path to pass. 86 is formed.

The light from the light source such as the lamp 87 is condensed by the condenser lens group 89 via the reflection mirror 88, and then irradiates the microfilm F located between the upper and lower pressure bonding glasses 90 and 91. The image recorded on the microfilm F is enlarged by the projection lens 92 and projected on the screen 71. When copying image information, the light passing through the pressure bonding glasses 90 and 91 is applied to a photoconductor drum (not shown). When searching the image projected on the screen 71, the operator operates the keys of the search board 73. Further, the lower pressure bonding glass 91 is provided so as to be vertically movable, and when the image is projected, the lower pressure bonding glass 91 is pressure bonded to the upper pressure bonding glass 90 via the microfilm F.

On the upstream side of the microfilm F with respect to the pressure-bonded glass 90, 91, a sensor for reading the blip M or IMC as the retrieval information which is reflected in the channels 9a, 9b of the A and B of the film F. Section is provided. As shown in FIGS. 9 and 10, the sensor unit includes a first mark reading sensor 95a as a first information reading unit for reading the search information printed on the A channel 9a,
A second mark reading sensor 95b as second information reading means for reading the search information printed on the B channel 9b.
And these first and second mark reading sensors 95
The a and 95b are attached to the sensor block 100 in which the film transport path is formed. The mark reading sensors 95a and 95b are formed at the same position along the transport direction of the film F. Incidentally, in the search device for searching the microfilm F in which the search information is imprinted with a slight shift along the longitudinal direction of the film, the mark reading sensors 95a and 9a are arranged so as to correspond to the misalignment between the search informations.
It is only necessary to shift each of 5b and arrange them.

Each of the mark reading sensors 95a and 95b is an LED provided so as to face each other with a film conveying path interposed therebetween.
And light receiving elements 94a and 94b such as photosensors. Light emitting element 9
The light from 3a and 93b is always received by the light receiving elements 94a and 94b. When the mark of the blip M or the IMC imaged on the film F passes between the elements 93a and 94a, 93b and 94b as the micro film F is conveyed, light is received or light is shielded, and the mark is read. It has become. Since the mark is black in the case of the NP film, the mark is detected when the light from the light emitting elements 93a and 93b is blocked, while the mark is transparent in the case of the PP film. , The light emitting element 93a,
The mark is detected when the light from 93b hits the light receiving elements 94a and 94b.

FIG. 11 is a schematic block diagram showing a control circuit for controlling the detection operation of the search information in the reader printer, and the CPU 105 functioning as a judging means has the mark reading sensor 95 for each of the above A and B channels.
a and 95b are connected, and each mark reading sensor 95
An AND circuit 106 for ANDing the output signals of a and 95b is connected. A mark length counter 107a for the A channel for obtaining the length of the search information;
Mark length counter 107b for B channel is CP
The counters 107a, 10 connected to the U105
7b counts the number of pulses from the encoder 82 in synchronization with the detection signals from the mark reading sensors 95a and 95b. The search information detection operation mode includes an AND detection mode in which it is determined that the search information is detected when the information read by the first mark reading sensor 95a and the information read by the second mark reading sensor 95b match each other. An individual detection mode is provided in which the mark reading sensors 95a and 95b separately detect the search information printed on the A and B channels 9a and 9b, respectively. These A
A changeover switch 109 is connected to the CPU 105 in order to set the ND detection mode or the individual detection mode. The CPU 105 has a storage medium 11 such as a ROM.
0 is connected, and from the CPU 105, a control member 1 such as motors MR and MF provided on the roll film carrier 72.
A control signal is output to 12 via the control circuit 111.

When the desired image information is retrieved from the large number of image information recorded on the microfilm F, the operator operates the keys of the retrieval board 73 to obtain the desired image information from the top frame. Enter the frame number (what chapter, how many, what page) etc. that indicates the frame number. When the operator gives an instruction to start the search, the roll film carrier 72 conveys the microfilm F between the supply reel 75 and the take-up reel 77.

At this time, in the sensor section, the first mark reading sensor 95a reads the information existing in the A channel 9a, and the second mark reading sensor 95b reads the information existing in the B channel 9a. 94b outputs a signal according to the reading of information. For example, when the microfilm F is an N-P film, the light emitted from the light emitting elements 93a and 93b is A,
When the light is blocked by the information existing in the B channels 9a and 9b, the light receiving elements 94a and 94b output signals according to the light blocking. Further, in the AND circuit 106, each light receiving element 94
The output signals from a and 94b are ANDed, and when some information is read by both of the mark reading sensors 95a and 95b, the AND signal is output.

When the changeover switch 109 is operated and the AND detection mode is set as the detection operation mode, the CPU 105, based on the signal from the AND circuit 106, causes both the mark reading sensors 95a and 95b to blip M. It is determined whether or not is read. For example, when the microfilm F is an N-P film, the light receiving element 94a of the first mark reading sensor 95a is the light emitting element 93.
The light from the a is received, and the second mark reading sensor 95
When only the light receiving element 94b of b is shielded from light, A
The AND signal is not output from the ND circuit 106,
The CPU 105 determines that the information existing on the B channel 9b read by the second mark reading sensor 95b is not the information about the blip M but the light on the B channel 9b side is blocked by dust or the like attached to the film F. To do. On the other hand, if both the light receiving elements 94a and 94b are shielded from light and the AND signal is output from the AND circuit 106, the CPU 105 determines that the information existing in the A and B channels 9a and 9b is the information regarding the blip M. to decide.

The A channel mark length counter 107a and the B channel mark length counter 107b respectively count the number of pulses from the encoder 82 in synchronization with the detection signals from the mark reading sensors 95a and 95b. ing. The length of the blip M along the transport direction of the film F is obtained from this count number, and the type of the detected blip M (M1, M2, M3) is identified. Then, the number of image frames is counted based on the identified blip M1 (M2, M3) to search for the target image information, the feeding of the microfilm F is stopped, and the pressure-bonded glass 91 below the microfilm F is inserted. Then, the retrieved image information is projected onto the screen 71 by being crimped onto the crimping glass 90 above. Further, when copying image information, the light passing through the pressure bonding glasses 90 and 91 is applied to a photoconductor drum (not shown).

In this way, the CPU 105 determines that the blip M is detected when the information read by the first mark reading sensor 95a and the information read by the second mark reading sensor 95b match, and therefore the film F is detected.
Even if dust or the like is attached to the top, the dust is not mistakenly recognized as the blip M, and the search accuracy of the image information is eliminated and the search accuracy is improved.

It should be noted that the AND circuit 106 may not be provided, and if the lengths of the information read by the mark reading sensors 95a and 95b match, this information may be determined to be information regarding the blip M. It is possible to prevent a reading error due to dust or the like.

A different type of blip M is imprinted on the microfilm F generally used in the past, that is, A and B channels 9a and 9b, or the blip M is imprinted only on one side of the channel 9a (9b). When searching for the inserted microfilm F, the switch 109 is operated to switch the detection operation mode to the individual detection mode. In this mode, each mark reading sensor 9
5a and 95b separately detect the blips M of the A and B channels 9a and 9b, respectively.
Even when searching for, the target image information can be detected without any trouble.

Although the case of detecting the blip M as the search information has been described, the detection of the IMC as the search information is similarly performed by ANDing the outputs from the mark reading sensors 95a and 95b. By doing so, a reading error due to dust or the like can be prevented.

[0058]

As described above, the microfilm photographing apparatus of the present invention includes the first and second search information imprinting mechanisms for imprinting the search information on both sides in the width direction of the microfilm. Since the control means controls the first and second retrieval information imprinting mechanisms so that the same retrieval information is imprinted on both sides, the same retrieval information is applied to both sides in the width direction of the microfilm. It can be imprinted easily. The microfilm retrieval apparatus of the present invention for retrieving a desired image from the image information imprinted on the microfilm retrieves one of the retrieval information imprinted on both sides in the width direction of the microfilm. First information reading means for reading information, second information reading means for reading the other search information, and information read by the first information reading means,
The second information reading unit has a determining unit that determines that the search information is detected when the information matches the information read by the second information reading unit. And the like are not mistakenly read as the search information, the search error of the image information is eliminated, the search accuracy is improved, and it becomes possible to quickly search or copy the microfilm.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of a microfilm according to an embodiment of the present invention.

FIG. 2 is an external perspective view showing the entire microfilm photographing apparatus according to the present invention.

3 is a view showing a film feeding device incorporated in the camera head shown in FIG.

FIG. 4 is a perspective view showing a retrieval information imprinting device incorporated in the camera head shown in FIG.

FIG. 5 is a schematic block diagram showing a control system for imprinting image information and search information on a microfilm by a microfilm photographing device.

[Fig. 6] L for imprinting a blip as search information
Time chart showing exposure timing of ED

FIG. 7 is an external perspective view showing a reader printer to which the microfilm retrieval device of the present invention is applied.

8 is a schematic configuration diagram showing an internal structure of the roll film carrier shown in FIG.

FIG. 9 is a perspective view showing a sensor unit provided in the roll film carrier.

FIG. 10 is a schematic vertical cross-sectional view showing the sensor section shown in FIG.

FIG. 11 is a schematic block diagram showing a control circuit for controlling a search information detection operation in the microfilm search device.

[Explanation of symbols]

9a ... Document mark channel, A channel,
9b ... Document mark channel, B channel,
(9a, 9b ... Both sides in the width direction of the microfilm), 50a, 50b ... LED, 54a ... First retrieval information imprinting mechanism, 54b ... Second retrieval information imprinting mechanism, 55 ... CPU (control means) , 95a ... First mark reading sensor (first information reading means), 95b ... Second mark reading sensor (second information reading means), 105 ... CPU
(Determination means) 106 ... AND circuit,
Bd, Bs ... Image information, F ... Microfilm, M (M1, M2, M3) ... Blip (search information).

Claims (3)

[Claims] 1. A microfilm on which image information of an original is imprinted, wherein the same search information is imprinted on both sides in the width direction of the microfilm. 2. A microfilm photographing apparatus for imprinting image information of an original on a microfilm, comprising first and second retrieval information imprinting mechanisms for imprinting retrieval information on both sides in the width direction of the microfilm. A microfilm photographing apparatus comprising: a control unit that controls the first and second search information imprinting mechanisms so that the same retrieval information is imprinted on each of the both side portions. 3. A microfilm retrieving apparatus for retrieving desired information from a plurality of image information by reading the retrieval information imprinted on the microfilm, the imprinting being performed on each of both sides in the width direction of the microfilm. First information reading means for reading one of the retrieved search information, second information reading means for reading the other search information, information read by the first information reading means, and the first information reading means. Determination means for determining that the search information has been detected when the information read by the second information reading means matches.
A microfilm retrieval device comprising: