JPS5966779A - Information retrieval device - Google Patents

Abstract

PURPOSE:To compensat accurately the stop position of a frame picture on a screen, by controlling a feeding means so as to stop an information recording medium after being fed by a prescribed length when an operating means is operated after the end of retrieval. CONSTITUTION:In closing operating switch 100 or 101 to correct the stop position of the frame picture, a signal sets a flip-flop circuit 102 via an inverter V1 and a pulse signal is given from a one-shot multiibrator circuit 103. Thus, an AND gate A1 is opened and a motor M3 is driven via a motor driving circuit 104. An output of an inverter V3 goes to low level and brake solenoids SOL3, SOL2 are not activated. The film is fed, the motor M3 is stopped after a set time of the one-shot multivibrator circuit 103, the brake solenoids SOL3, SOL2 are activated via brake driving circuit 106, 107 and the film comes to a stop.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for automatically searching for desired information in a recording medium such as a microfilm on which information is recorded.
In particular, the present invention relates to a device that can accurately adjust the stop position of an information recording medium after a search. First, an overview of an example of the above-mentioned search device will be explained. In Fig. 1, a film supply cartridge stores one roll of microfilm F, 2 is a capstan roller for feeding out the microfilm in the cartridge, Ml is a motor that drives capstan roller 2, and M2 is a motor that drives capstan roller 2. car
A film rewinding motor for rotating the film spool in the cartridge, SQL 1 is a support arm 6 that brings the capstan roller 2 into contact with the microfilm F, and 4 is a support arm 6 and a granger 6a@ A spring that moves the gear stan roller 2 to separate the capstan roller 2 from the microfilm, SQL2 is a brake solenoid for the film rewinding motor M2, and when this brake solenoid 5QL2 does not operate, the motor M
2 is rotatable, and when the brake lever maid SQL 2 is activated, it attracts a brake plate 5 fixed to the motor shaft to prevent rotation of the motor.

6/7 film guide roller, SA roll, S-row, M6
is a film winding motor for rotating the take-up reel 8, and SQL 3 is a brake solenoid for the motor M6.

Also, although not shown, the cartridge 1 and the take-up reel 8
A guide plate is provided to guide the film along the film feeding path between 0 and 0.

14 is a lamp for illuminating the microfilm Fi, 15 is a condenser lens, 16 is a projection lens for enlarging and projecting the image of the film F illuminated by the rung 14 onto a screen (not shown), and 17 is a side of each frame of the microfilm F. This is a known mark detector that detects a counting mark door provided on the side.

The mark detector 17 has a photoelectric conversion element, and when the film F is fed, the light beam from the rung 14 is interrupted by the mark m, thereby emitting a mark detection signal, and this mark detection signal is sent to the counter of the search device. is counted. The details of the counting device using mark signals are well known and will therefore be omitted.

When the frame number of a desired frame is input into the input circuit of the above search device, the motor M1 is driven and the solenoid SQLi is activated. As a result, the capstan roller 2 comes into contact with the microfilm F coming out of the cartridge 1, and the microfilm F is pulled out from the cartridge 1.
When the tip approaches the take-up reel 8,
When the tip of the microfilm is wound onto the take-up reel 8, the motor M1 and solenoid SQLi become inactive, but the microfilm F
Fi, the number of marks m detected by the mark detector 17 during feeding of the 0 micro film that is continuously fed by the rotation of the take-up reel 8 is counted by a counter, and a stop Z number is generated from several books in advance. Brake solenoid SQL 3 operates to brake the take-up shaft 11, and brake solenoid 5QL 2 also brakes the shaft of motor M2 to stop the inertia rotation of the feed spool, and the film feeding is stopped and the frame image of the desired number is It is projected onto a screen via a projection lens.

In the above configuration, the stop position of the film is not constant due to changes in the film feeding speed due to changes in the film winding diameter with respect to the reel 8 and the spool of the cartridge 1, and the film is stopped at a constant position due to changes in the film feeding speed due to changes in the film winding diameter with respect to the reel 8 and the spool of the cartridge 1. There will be a slight shift in the position of the frame images projected. Therefore, the frame images projected on the screen are transferred to the printer (
(not shown), it is necessary to correct the stopping position of the frame image on the screen.

Conventionally, when correcting the stop position of a frame image, the winding wheel 8 has been manually rotated in the winding direction or the rewinding direction, but it has been difficult to precisely position the winding wheel 8. Another known method is to operate the speed adjustment knob to feed the film using a motor to correct the stop position, but there is a time lag between returning the speed adjustment knob to the stop position and the time the film actually stops. Because of the misalignment, the film would stop at a position that had passed past the predetermined position, requiring repeated positioning operations, and moreover, it was difficult to position accurately.

The object of the present invention is to accurately correct the position of an image, and is provided with an operating means for correcting the stop position, and when the operating means is operated, the information recording medium is fed a predetermined length and then stopped. The structure is such that the feeding means is controlled so as to

Below, the specific configuration will be explained using illustrated examples. ! ):] shows a block diagram of the feed control circuit of the search device to which 100 and 101 are operation switches, 102 is a flip-flop circuit, 103 is a motor drive circuit that operates one-shot multi-time m, and 104U motor M3em. , 1051 to drive motor IA2.
106 is a brake drive circuit that drives Brake Tsuremade 5OL5i, 107 is a brake drive circuit that operates Plagin Lenoid SQL2eJgA, ■1, ■2
・■6 is an inverter, A1 and A2 are AND gates, R1
・R2 is an or gate.

The operation switches 100 and 101 are self-recovery type switches or lanari switches, and are used to correct the stopping position of the image. When they are closed, a high level (hereinafter referred to as
It outputs the belief +j of ).

The one-time operating switch 100 is operated when moving the film F in the direction of arrow A in FIG. 1 to correct the stop position, and the other operating switch 101 moves the film F in the direction of arrow B.
It is operated when the stop position R is corrected by moving in the direction.

The 7 lip 70 knob circuit 102 is an operation round switch 100
It is set when the operating tool switch 101 is operated, and reset when the operating tool switch 101 is operated.

One-shot multi-circuit 103H operation switch f 100
- Operate 101 to output a pulse signal of H at 9 o'clock for a predetermined time T. The one-shot multi-circuit 1060 predetermined time T is determined by the time constant of the circuit, and can be changed by changing the time constant. A known timer may be used instead of the one-shot multi-circuit.

FIG. 6 shows an output signal waveform diagram of each part in FIG. 2.

Next, the operation of the above device will be explained. In the above device, when the search operation is completed and the film stops, if the desired frame image is shifted from a predetermined position (for example, a position where the center of the image and the optical axis of the projection lens coincide) in direction B and stops. operates the operation switch 1(]o in order to correct the stop position of this frame image. When the operation switch 100 is closed, an H signal is output from the inverter 1, and this signal sets the flip-flop circuit 102. The one-shot multi-circuit 10 is activated, and the one-shot multi-circuit 103 outputs a pulse signal.
1-A i opens, and motor M 3 is driven via motor drive circuit 104 . At this time, the output of inverter ■6 becomes low level, and brake solenoid 5OL3/5Q
L2 does not operate. As a result, the film is fed in the input direction, and when the time T set by the one-shot multi-circuit 103 has elapsed, the drive of the motor M6 is stopped, and the brake solenoids 5OL3 and 5QL2 are activated via the brake drive circuits 106 and 107'. The brakes work,
The film stops.

Therefore, when the operating switch 100 is operated once, the film Fi is fed in the input direction by a certain length.

The operation switch 100 is pressed until the frame image is placed in a predetermined position.
' By operating the IC several times and repeating the above operation, the frame image can be accurately positioned at a predetermined position.

Precise positioning can be achieved by shortening the setting time of the one-shot multi-circuit. According to experiments, when the set time T is set to approximately 53 TL sac, the film is
．． It can advance 5mm, allowing for more precise positioning than conventional manual positioning. Furthermore, if the desired frame image deviates from a predetermined position in the input direction and stops, the operation switch 101 may be operated.

In the above embodiment, the motor is driven for a set period of time as a method of feeding the film a predetermined length, but other known methods may be applied. For example, it is possible to use a pulse motor as the film feeding motor, generate a predetermined number of pulses when the operating switch is operated, and send this predetermined number of pulses to the pulse motor to feed the film a predetermined length. can.

As described above, according to the present invention, the information recording medium is fed a certain length when the operating means is operated after the search is completed.
Be able to easily and accurately position information recording media.

[Brief explanation of drawings]

Figure 1 shows the main components of a search device to which the present invention is applied;
FIG. 2 is a diagram showing the feed control circuit, and FIG. 6 is a diagram showing the output signal waveforms of each part of the circuit.
-・9-Motor F----Film

Claims (1)

[Claims] an input means for inputting an address of information to be searched; a counting means for detecting and counting marks in the information recording medium; a feeding means for feeding the information recording medium; a first control means for controlling the feeding means so as to compare the counted value of the counting means and stop the information recording medium when the two match; and an operating means for correcting the stop position of the information recording medium; and a second control means for controlling the feeding means so that when the operating means is operated, the information recording medium is fed for a predetermined length and then stopped.