JPH043256A - Retrieving device for microfilm reader - Google Patents

Abstract

PURPOSE:To facilitate the retrieval by stopping a film by detecting a target frame, and also, displaying an address of the film at the time of feeding in reverse the film. CONSTITUTION:When the film is running, the running quantity from the head of the film and blip information are integrated, for instance, by a counter in a running quantity detecting means 126 and a blip detecting means 70, respective ly. Also, when a group of the lowest hierarchical layer of the blip is varied during this time, an address of a final frame of the group immediately before it is stored in a memory means 110. When the blip detecting means 70 detects a target frame, based on the contents of its counter, the running quantity at that time is stored immediately in the memory means 110, and the film is fed in reverse to the target frame. In the course of this reverse feed, whenever the group of the lowest hierarchical layer is changed, a final address of the group which enters newly from the memory means 110 is read out, and it is displayed on a display means. In such a way, the frame can be retrieved easily.

Description

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

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

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

For example, frame 4A with absolute address 5 in Figure 5 has 1 block, 2 files, and 2 pages, so (1, 2, 2)
This is what gives the address.

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

When searching for a target frame from a film that has been addressed in this manner, the address is detected while the film is running, and a frame that matches the target frame is searched for. Even if the target frame is found here and the film is stopped, due to the inertia of the rotating parts, the film will travel a considerable distance before stopping. For this reason, the amount of travel due to inertia must be reversed. However, at this time, since the flip is read in the reverse direction, the address cannot be determined unless the last address of each layer is known. For this reason, there were problems in that the address could not be displayed during reverse transmission, and that it was necessary to return to the first frame of each layer and then assign the address again.

(Object of the Invention) The present invention has been made in view of the above circumstances, and is a microcomputer capable of detecting a target frame, stopping the film, and displaying the address of the film when the film is fed backwards. The purpose is to provide a search device for film leagues.

(Structure of the Invention) According to the present invention, this object is to calculate the running distance from the beginning of the microfilm in a microfilm league in which a predetermined target frame is searched based on the flips attached to the microfilm, which are classified into multiple layers. A travel amount detection means for detecting, a flip detection means for detecting flip information from the microfilm, and a memory means for storing the travel amount and the address of the last frame of the lowest level group of flips sequentially read out while the film is running. a match/mismatch determining means for stopping the film advance when the read flip matches the target frame; and a feed control means for reversing the film from the film stop position and searching for the target frame using the contents of the memory means; A display means for displaying the address of a frame while the film is running, and when the lowest layer group changes while the film is being fed backwards, the address is determined and displayed using the address stored in the memory means. This is accomplished by the Microfilm League's retrieval equipment.

(Function) While the film is running, the running distance from the beginning of the film and the flip information are accumulated on, for example, a counter in the running distance detecting means and the flip detecting means, respectively. Also, during this time, when the lowest level group of flips changes, the address of the last frame of the immediately previous group is stored in the memory means. In this way, an appropriate number of addresses of the lowest hierarchy groups are stored in memory. When the flip detecting means detects the target frame based on the contents of the counter of the flip detecting means, the traveling distance at that time is immediately stored in the memory means, and the film is reversely fed to the target frame using this memorized information. During this reverse feeding, each time the group at the lowest level changes, the last address of the newly entered group is read from the memory means, and this address is subtracted while the film is running to obtain the address and display it on the display means.

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

The roll microfilm 2 used in this embodiment is housed in a cartridge 8 (FIGS. 1 to 3) and loaded into the reader/printer device 10.

The reader/printer device 10 is configured as shown in FIG. That is, the front of the case 12 (right side in Figure 1)
A transmissive screen 14 is disposed at , on which an enlarged image of the frame 4 of the cartridge 8 is projected. The cartridge 8 is loaded into a loading section 16 located below the screen 14.

The leading end of the film 2 wound on the supply reel 18 in the cartridge 8 is pulled out by a loading mechanism and wound on the take-up reel 20. both reels 1
A light source 22 is arranged below between 8 and 20. The light emitted from this light source 22 passes through the film 2 and passes through the projection lens 2.
4. Image rotation prism 26, multiple reflection mirrors 28.30
．． The light is guided to the screen 14 through an optical system consisting of 32 and the like. As a result, the image information recorded on one frame 4 of the film 2 is enlarged and projected.

A mirror 34 that can move forward and backward on the optical axis is provided between the reflecting mirrors 28 and 30, and during printing, image projection light is transmitted to a printer device 36 located below by this mirror 34.
lead to. Note that this printer device 36 is, for example, of a PPC type, and forms an electrostatic latent image of an image by exposing a photosensitive drum 36a (see FIG. 3), and makes a visible image by adhering toner to this latent image. , which is transferred onto printing paper and fixed. Further, this printer device 36 is
A masking device 38 is provided to block the incidence of projection light, and particularly in the case of a negative film, it blocks the incident light that would create a black border in the image.

The film advance mechanism is shown in FIG.

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

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

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

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

The rotation speed of the tension roller 64 is detected by an encoder 66. Based on the output pulse signal of the encoder 66, the running amount of the endless belt 50, that is, the running amount of the film 2, is determined by the running amount detecting means 126 included in the CPU l 02, which will be described later.

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

Note that the upper flip 6a showing the block is the light receiving element 70.
a, and the lower flip 6b indicating the file and page is detected by the light receiving element 70b. The output of the light-receiving element 70b is identified as a file or a page flip using a flip width tolerance inputted in advance.

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

In other words, when the target flip 6 of frame 4 is detected,
Wind film 2 only at a further distance from there 20
If the target frame 4 is sent to the side, the target frame 4 will enter the optical axis C.

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

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

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

Next, the control device 100 will be explained based on FIG. The control device 100 is a digital processing device (hereinafter referred to as CPTJ) 102
and input/output interface (I/F) 104.10
6, a ROM 108 for storing operating programs, etc., and a RAM 110, etc. RAMll0 stores various data such as image signals read by the crawler sensor 78, travel distance, and flip information. Various signals are input to this CPU 102 via an input I/F.

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

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

118 is a liquid crystal display board, which displays the address of the image being read, as will be described later.

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

The CPU 102 has the function of the flip detection means A shown in FIG. 4, and counts the number of flips 6 for each type. That is, when the film 2 is running, a flip 6a indicating a block is read by a light receiving element 70a, and the number of flips 6a indicating a block is read by a light receiving element 70b, and the number of flips 6b indicating a file and page is read by a light receiving element 70b. is determined by the flip determining means 124. In other words, the running distance of film 2 is
It is monitored by the traveling distance detection means 126 that integrates the output pulses of the encoder 66, and the flip determination means 124
The flip width is determined by detecting the travel distance while the light receiving element 70b detects the flip 6b, and a flip indicating a file and a flip indicating a page are discriminated.

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

In this manner, while the film 2 is running, the running amount and the integrated value of the counter means 122, 126, 128 are constantly rewritten, and the memory means of the RAM 110 is constantly rewritten with this integrated value.

Here, the binary signals indicating each phase of the integrated value are simultaneously input to the memory means, and the rewriting is performed extremely quickly.

Further, each time the group at the lowest level (page) changes, the address of the last frame of this group is stored in the RAM 110, and this address is stored up to an appropriate number of groups before the currently displayed frame. For example, if the addresses in the middle of the film are as shown in the table below, the memory means 110 stores (n, 1.2), (n, 2.4).
, (n+1.1.3), (n+1.2.2), etc. It is sufficient for the memorized addresses to go back an appropriate number of times corresponding to the amount of inertial travel of the film with respect to the frame being read, and addresses exceeding this number are sequentially erased.

The count value of the counter means 122, 126, 128 indicates the address of the image being read out, and this address is used by the keyboard 1 in the match/mismatch determining means 130.
The address is compared with the address input from 12 or the like. When the addresses match, the feed control means 132 stops the motors 60, 62. However, the film 2 continues to run due to the inertia of the rotating parts. The travel distance L' of the film 2 at the stop position is sent to the feed control means 132, where the rewind amount (L'-L) is calculated and the film is fed backwards. Then, the film 2 is returned to the vicinity of the target frame, and the film 2 is further forwarded or reversed as necessary to detect the target frame. During this reverse transfer, when the group at the bottom layer (page) of the flip changes, the address of the last frame of the newly entered group is read from the memory means 110, and the count value of each layer of this address is subtracted. The address of the frame can always be obtained and displayed on the display means 118.

In the embodiments described above, the distance traveled from the beginning of the film is detected by the encoder 66, but it is also possible to use the order of frames from the beginning of the film (absolute address) instead of or in combination with this.

Further, as the flip information, the counter means 122.1
In addition to the count value of 26.128, the position and width of the flip may also be included. In this case, it is possible to further improve the accuracy of searching for the target frame during reverse transport.

(Effects of the Invention) As described above, this invention stores the address of the last frame in the lowest group from the flip read when the film is running, so when the target frame is detected and the film is reversed. By reading this memorized address and subtracting it when the group in the lowest hierarchy changes, it is possible to obtain and display the address even during reverse transmission.

This makes it easier to search for frames.

[Brief explanation of drawings]

Fig. 1 is an overall schematic diagram of an embodiment of the present invention, Fig. 2 is a perspective view of a part thereof, Fig. 3 is a system diagram of its control signals, Fig. 4 is a conceptual diagram showing only the main parts, and Fig. 4 is a conceptual diagram showing only the main parts. Figure 5 shows a microfilm. 2... Micro film, 6... Flip, 10... League printer device, O... RAM as memory means, 8... Display means, 6... Travel distance detection means, 0... - Matching/mismatching determining means, 2... Feeding control means.

Claims (1)

[Scope of Claims] A microfilm reader that searches for a predetermined target frame based on a plurality of hierarchically divided flips attached to a microfilm, comprising: a traveling amount detection means for detecting a traveling distance from the beginning of the microfilm; a flip detection means for detecting flip information from the microfilm; a memory means for storing the travel distance and the address of the last frame of the lowest level group of flips sequentially read out while the film is running; a match/mismatch determining means for stopping the film advance when the film matches the above, a feed control means for reversing the film from the film stop position and searching for a target frame using the contents of the memory means, and a feed control means for searching the target frame while the film is running. A retrieval device for a microfilm reader, comprising: a display means for displaying an address, and the address stored in the memory means is used to determine and display an address when the lowest layer group changes during reverse feeding of the film.