JPS6236213B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a search device for searching information recorded on a film.

Microfilm, which records a large amount of information in a reduced size, is used in various forms such as roll film and film film, but long roll film is usually stored in a cartridge. many.

However, since there is no unified standard for this cartridge, the format varies depending on the manufacturer. Figures 1 and 2 show typical cartridges. The cartridge in Figure 1 has a container 1 that stores microfilm in a roll, and the tip of the microfilm has the same width as the microfilm. A leader film 2 is connected, and a protrusion 3 is provided at the tip of the leader film. The microfilm is wound onto the cartridge by this protrusion with the leading end of the leader film always protruding from the container. The microfilm stored in the cartridge shown in FIG. 2 has a leader film 7 connected to its tip which is wider than the microfilm and wider than the spacing between the reel flanges in the container 6, and the microfilm and leader film are always kept in the container. 6 and is wound up into a cartridge.

Furthermore, the colors and lengths of the leader films 3 and 7 and the colors of the joining tapes 2' and 7' that join the leader films and the microfilm differ depending on the cartridge. A mark detector detects these leader films and bonding tape and generates a signal, but the timing and width of this signal vary depending on the type of cartridge. By the way, when these cartridges are used, conventionally, it has been necessary to provide a search device dedicated to each cartridge, which has been problematic due to high costs.

Therefore, in order to increase the number of commonly used parts as much as possible, we made a common control unit, and multiple units have a mechanism that holds cartridges of different shapes and automatically transports the microfilm stored in the cartridges to a predetermined position. It is conceivable to prepare several film carriers and selectively attach the film carrier corresponding to the cartridge to be used to the search device, but as mentioned above, the shape, color, and length of the leader film are different. Furthermore, since the method for extracting the film from the cartridge is different, simply replacing the film carrier may cause problems in transporting and retrieving the film.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a retrieval device that always operates correctly regardless of the change of film carrier.

An embodiment of the present invention will be described below based on the drawings. FIG. 3 shows the first film carrier used exclusively for the cartridge shown in FIG. Ru.

11 is a microfilm on which information is recorded; 1
Reference numeral 2 denotes a cartridge in which a microfilm is stored, 13 a motor for drawing out the film, 14 a capstan roller for drawing out the film, and 15 a pinch roller for drawing out the film. 16 is a film guide, and 17 and 18 are mark detectors for optically detecting first and second marks for search on the film, each having a photoelectric conversion element. 19 is a projection lamp, 20 is a condensing lens, 21 is a projection lens,
This lamp and optical system are located on the reader side rather than on the film carrier, and the light beam passing through the projection lens is projected onto the screen. 22
2 is a film drive motor; 23 is a brake device; 24 is a film drive capstan roller rotated by the film drive motor;
5 is a pinch roller which works together with a capstan roller to drive the film; 26 is a micro switch that detects the presence of the film; 27 and 28 are motors for tensioning the film; and 29 is a take-up reel that automatically winds up the film. When the cartridge 12 is loaded into the film carrier, the film take-up shaft of the cartridge and the motor 27 are drivingly connected. The shaft of take-up reel 29 is drivingly coupled to motor 28 .
The motors 27 and 28 each drive the film to wind it around its shaft and maintain the film at a constant force. The first film carrier is attached to and removed from the leader at a predetermined position. Attach the first film carrier with the cartridge 12 set to the leader, sandwich the leading end of the film in the cartridge 12 between the capstan roller 14 and the pinch roller 15, and press the start key to start each motor. , the film is fed out of the cartridge by capstan roller 14 and pinch roller 15, passes through a position illuminated by lamp 19, and then fed by capstan roller 24 and pinch roller 25. , automatically wound onto the take-up reel 29. While the film is being transported, the search marks on the film are detected by mark detectors 17 and 18, and the mark detection signals output from the mark detectors are sent to the control section of the detection device and counted. Desired information is retrieved. Since the details of the search device are publicly known, their explanation will be omitted. When the micro switch 26 detects the film, the motor 13 stops. When a search mark corresponding to desired information is detected, a search end signal is output from the search device, and this signal causes the motor 22 to stop, the brake device 23 to operate, and the film to stop. When the film stops, the desired information is in a position illuminated by lamp 19, and this information can be read on the screen. To rewind the film into the cartridge, the motor 22 is driven in the opposite direction.

Next, when using the cartridge shown in Figure 2, remove the first film carrier shown in Figure 3 from the leader, and replace the second film carrier (not shown) dedicated to the cartridge shown in Figure 2. Attach it to the reader. The second film carrier that uses the cartridge shown in Figure 2 is different from the one in Figure 3 in the roller that pulls out the film from the cartridge (there is a capstan roller at a position that contacts the periphery of the reel flange in the cartridge). Other than that, the structure is almost the same as that shown in FIG.

Either one of the first and second film carriers is selectively attached to the reader, and when attached, generates a corresponding control signal, and this control signal switches the control circuit of the search device. It is configured.

FIG. 4 shows a control circuit, 30 is the first film carrier, 31 is an electrical connector provided on the first film carrier, and when the film carrier 30 is installed in a predetermined position on the reader, the reader side is controlled. It is electrically coupled to a corresponding portion of a connector 32 provided in the circuit. Terminal 31 ₁ of connector 31 is normally open contact a of micro switch 26
, terminal ₃₁₂ is not connected to contact a,
Terminal 31 ₃ is connected to mark detector 17 and terminal 31 ₄ is connected to mark detector 18 . Furthermore, the terminal 31 _o is connected to the contact c of the micro switch via a resistor, the terminal 31 _o-1 is connected to the contact a, the terminal 31 _o-2 is connected to the contact c, and the other terminals 31 ₅ to 31 _o-3 is each motor 13/2
2, 27, 28 and the brake device 23, etc., respectively. Terminal 3 of connector 32
2 ₁ is AND gate 35 and mark counting circuit 34
The terminal 32 ₂ is connected to the AND gate 36 and the mark counting circuit 34 , and the terminal 32 ₃ and the terminal 32 ₄ are connected to the mark counting circuit 34 . Furthermore, terminal 32 _o is connected to the power supply, and terminal 3
1 _o-1 is grounded, terminal 32 _o-2 is connected to the timer 37.
38 reset terminal, and the other terminal 3
2 ₅ to 32 _o-3 are connected to a drive control circuit 39 . 40 is the start key, 41 is the or gate,
42 is an alarm. Timer 37 and Timer 3
The operating times of 8 are set differently.

The second film carrier has terminals that are in the same connection state as the first film carrier, except that the connection states of the terminals corresponding to the terminals 31 ₁ and 31 ₂ of the first film carrier 30 are different from those of the first film carrier. There is. The terminal of the second film carrier corresponding to the terminal 31 ₁ of the first film carrier 30 is not connected to the normally open contact a of the micro switch 26, and the terminal of the second film carrier corresponding to the terminal 31 ₂ is normally open. Connected to contact a.

If you want to perform a search with the first film carrier 30 attached to the reader, press the start key 40.
When is pressed, a search start command signal is output, and this signal activates the timers 37 and 38, and a drive signal is output from the drive control circuit 39. This drive signal is sent to each motor of the film carrier 30 through connectors 31, 32, and motors 13, 22,
Drives 27 and 28. As a result, the film is sent out from the cartridge 12 and conveyed along a predetermined path. When the film is being transported normally, contacts a and c are connected when the micro switch 26 detects the film.
A reset signal is generated at terminal 32o _-1 , and timers 37 and 38 are reset by this reset signal.

If the film is not conveyed normally and jams in the middle of the passage, the micro switch 26 will not detect the film, so the timer 37 will not be reset, and the timer 37 will output a signal after the set time has elapsed. This opens the AND gate 36, and the output signal of the timer 37 is sent to the drive control circuit 39 as a stop signal, thereby stopping each motor and activating the brake device 23 to stop the film and prevent damage to the film. Ru.
On the other hand, the alarm 42 is activated by the output signal of the timer 37.
operates and notifies the operator of abnormal conditions.

By the way, as mentioned above, since the shape of the leader film and the method of pulling out the cartridge differ depending on the manufacturer, it is necessary to change the time required to issue the above-mentioned alarm/stop signal.

This is because, for example, in the cartridge shown in FIG. 1, the tip of the leader film is outside the cartridge, so as soon as the start key is pressed and the film pull-out motor starts rotating, the leader film is pulled out of the cartridge and the film guide 16 is pulled out.
It is sent to the winding section through the On the other hand, in the cartridge 12 shown in Fig. 2, the leader film is wound up inside the cartridge, so even when the start key is pressed and the film pull-out motor starts rotating, the leading edge of the leader film is immediately sent out of the cartridge. It doesn't come.

That is, the time it takes for the leading edge of the leader film to come out of the cartridge differs depending on where in the cartridge it is. The leader film is fed out after the time required for the reel to rotate once within the largest cartridge.

For this reason, there is a difference in the time from when the start key is pressed until the film reaches the film detection micro switch 26 between the two, and therefore the predetermined time until the alarm is issued must also be different. .

The operating time of the first timer circuit 37 is set to correspond to the cartridge shown in FIG. 1, and the operating time of the second timer circuit 38 is set to correspond to the cartridge shown in FIG.

When the second film carrier is replaced and used, a control signal different from that of the first film carrier is generated from the terminals 32 ₁ and 32 ₂ , and the circuit is activated so that the second timer 38 works effectively by this control signal. Can be switched. That is, when the second film carrier is attached, the same operation as described above occurs when the film is being transported normally, but when the film jams in the middle of the passage, the output signal of the second timer 38 is used to control the unloading. The gate 35 opens, and this output signal causes each motor to stop via the drive control circuit, and an alarm is activated to notify the abnormal state. Therefore, the control circuit is switched depending on the type of film carrier, and abnormal conditions in film transport can be detected, thereby preventing damage to the film.

Also, since the lengths of the leader films of both cartridges are different, the film detection micro switch 26
From the moment the camera detects the film, a false mark detection signal from the leader film or splicing tape,
The time required for the first regular mark to generate a mark detection signal also differs. When mark counting starts, the part that outputs the pseudo mark detection signal, that is, the leader film and the splicing tape, are detected by the mark detectors 17 and 18.
It is necessary to control the period from when the first mark on the microfilm passes through until it reaches the mark detector. If the other film carrier is used, false mark detection signals may be counted, or genuine mark detection signals may not be counted.

Therefore, it is necessary to change the counting start timing depending on the film carrier. One embodiment is shown in FIG. Figure 5 shows the details of the mark counting circuit in Figure 4, and 60 and 61 are the micro switch 2.
a timer for determining the time from the time of film detection to the start of counting of each carrier;
2, 63, 66, and 67 are AND gates, 64 is an OR gate, and 65 is a flip-flop. 7
Reference numeral 1 indicates a first counter that counts mark detection signals caused by the first search mark on the film, and 72 indicates a second counter that counts mark detection signals caused by the second mark.

Now if we use the first film carrier,
The AND gate 62 is opened by signals from the terminals 32 ₁ and 32 ₂ , and the AND gate 63 is closed. When the film detection micro switch 26 detects a film and a film detection signal is input from the terminal 32 _o-2 , the third timer is activated.
After the set time, a signal is output from the third timer. This output signal passes through an AND gate 62 and an OR gate 64 to set a flip-flop 65, and the set side output of this flip-flop 65 is sent to AND gates 66, 67 as a search mark count start signal.
is opened, and mark detection signals from mark detectors 17 and 18 are input to each counter. In other words, after the set time of the timer 60, each counter 71.
72 becomes capable of counting operation. Note that the fourth timer also operates at the same time, but its output is AND gate 6.
3 is blocked and invalidated. On the other hand, when the second film carrier is used, the AND gate 62 is closed and the AND gate 63 is opened.
5 will be set.

As a result, no matter which film carrier is used, a mark counting start signal suitable for each carrier is generated, thereby eliminating miscounts.

FIG. 6 shows another embodiment of the control circuit,
Components that are the same as those in the previous embodiment are designated by the same reference numerals. This control circuit consists of a stored program type processor, such as the Motronra 6800 series microprocessor. 50 constitutes a circuit having a central processor unit (CPU) and random access memory (RAM); 51 constitutes an interface circuit between input/output circuits such as a film carrier start key and a drive control circuit and the CPU; Peripheral interface adapter (PIA), 52 is a read-only memory in which a control program is stored, 53 is a data bus for exchanging data,
Reference numeral 54 denotes an address bus through which an address signal for specifying the address of the PIA and ROM from the CPU passes. A search start command signal from the start key 40, a control signal indicating the type of film carrier, a film detection signal, etc. from the connector 32 enter the CPU from the input port of the input/output PIA, and are used to control the program.
Used for switching.

Since a timer can also be created by a program (details are omitted as they are publicly known), no film detection signal is output from the microswitch 26 even after the time specified by each film carrier has elapsed since the search start command. In this case, an alarm signal and a stop signal are output from the output port of the PIA, and the film is thereby stopped in the same manner as described above.

Even if the control circuit is configured using a stored program type microprocessor as shown in Figure 6, the timer can be created using a program in the same way (how to create a timer using a program is well known, so it will be omitted).PIA Since a signal indicating the type of film carrier and a film detection signal are also input to the CPU from the input port of , the program can be switched to start mark counting after a predetermined time using these signals.

In the above embodiments, two types of film cartridges were used; however,
Of course, many other types of film carriers can be combined.

As described above, according to the present invention, by simply replacing the carrier, various film cartridges can be used as a common search device to correctly detect the transport status of each film, and information on each film can be accurately detected. It is possible to search, and it is possible to reliably prevent erroneous searches.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of the cartridge, and Figure 3 is a perspective view of the cartridge.
4 is a diagram showing a control circuit, FIG. 5 is a diagram showing a mark counting circuit, and FIG. 6 is a diagram showing another example of the control circuit. 12... Cartridge, 13, 22, 27, 2
8...Motor, 26...Micro switch, 3
1.32...Connector.

Claims (1)

[Scope of Claims] 1. It has means for holding a first cartridge and transporting the film in the first cartridge to a winding section,
It has a first carrier that is removably attached to a predetermined position in the apparatus main body, a means for holding a second cartridge different in type from the first cartridge, and means for conveying the film in the second cartridge to the winding section, A second carrier that can be attached and detached alternately with the first carrier at a predetermined position.
A carrier, a detection means for detecting whether or not the film is present at a predetermined position on the film transport path, a signal generation means for generating a signal corresponding to the carrier attached to the main body of the apparatus, and activated when film feeding is started. a first timer for outputting a timeout signal when a first set time has elapsed; a second timer for generating the signal; means for selecting the output of either the first timer means or the second timer means in response to a signal output from the means; and the selected timer means outputs a timeout signal before the detection means detects the film. and a means for outputting a transport abnormality signal when the transport abnormality occurs. 2 having means for holding the first cartridge and transporting the film in the first cartridge to the winding section;
It has a first carrier that is removably attached to a predetermined position in the apparatus main body, a means for holding a second cartridge different in type from the first cartridge, and means for conveying the film in the second cartridge to the winding section, A second carrier that can be attached and detached alternately with the first carrier at a predetermined position.
A carrier, a detection means for detecting whether or not the film is present at a predetermined position on the film transport path, a signal generation means for generating a signal corresponding to the carrier attached to the main body of the apparatus, and the detection means detects whether or not the film is present at a predetermined position. a first timer that is activated when the film is detected and outputs a time-out signal when the first set time has elapsed;
a second timer for outputting a timeout signal when a set time elapses; and means for selecting the output of either the first timer or the second timer in response to the signal output from the signal generator; A retrieval device comprising mark detection means for detecting marks on a film, and means for outputting a signal for permitting counting of signals output from the mark detection means when the selected time limit means outputs a timeout signal.