JPH02100031A - Film retrieval device - Google Patents

Abstract

PURPOSE:To eliminate such trouble that a film slacks or is fed and to facilitate adjusting operation by increasing the load on the rotation of a take-up shaft in the state wherein motors stop. CONSTITUTION:While the rewinding and take-up motors 5 and 8 stop, the load is placed on the take-up shaft 7 which a fine adjusting knob 11 is coupled to rotate the fine adjusting knob 11 slowly and the take-up shaft 7 also rotates slowly. Therefore, a rewinding shaft 4 is prevented from coming not to rotate following up the rotation of the take-up shaft 7. Further, when the fine adjusting knob 11 is not rotated, braking operation is performed to prevent the trouble that the film F is sent. Consequently, the trouble that the film F slacks or is fed is prevented without adjusting voltages applied to both the motors 5 and 8 finely according to the winding diameter of the film F, thereby facilitating the adjusting operation.

Description

[Detailed Description of the Invention] (Industrial Use ￥f) The present invention relates to a film retrieval device that automatically retrieves and conveys a film such as a roll-shaped microfilm stored in a cartridge. .

(Prior Art) Conventionally, as a device for searching a roll film (hereinafter referred to as a roll film) such as a microfilm stored in a cartridge, the one shown in FIG. 7 is known. This device winds the film F pulled out from a roll film stored in a cartridge 101 onto a take-up reel 104 via known film guide rollers 102, 103, etc. B each rewind reel 105
The film frame is searched for using an optical system consisting of a light source 106, lenses 107, 108, etc. while rotating alternately in the A direction and the A direction.

By the way, when a searcher searches for a desired film frame and stops the film, the film frame may deviate from the stop position. In order to correct this amount of deviation, use the fine adjustment knob 10 directly connected to the take-up reel shaft while looking at the screen.
A mechanism is often used in which the film frames are finely adjusted by manually rotating the film frame 9.

This fine adjustment mechanism is for preventing slack. In other words, since the fine adjustment knob 109 is directly connected to the winding shaft, when the fine adjustment knob 109 is rotated so that the film is fed in the direction of arrow G (rewinding direction), the film will become slack if left as is. In order to prevent the film from sagging, the voltage of the winding remoter that is output by rotating the fine adjustment knob 109 is detected and amplified, and the amplified voltage is input to the rewinding motor. The rewind motor is driven in accordance with the rotation of the film 109, so that the rewind can be performed.

In addition, this fine adjustment mechanism applies force in the rewinding direction to the rewind motor and force in the winding direction to the winding remoter in order to improve the followability of the film when making fine adjustments. By inputting voltage so that it is applied, the mechanism balances out the forces of both motors while keeping tension on the film at all times.

(Problem to be solved by the invention) However, since the rotational load of the rewind motor varies greatly depending on the film winding diameter, it is necessary to precisely adjust the voltage input to the rewind motor according to the film winding diameter. The film may become slack because it cannot be rewound to follow the rotation of the knob, or the film may be forwarded due to imbalance between the forces of the winding remoter and rewind motor when the fine adjustment knob is not rotated. This had the disadvantage of causing problems.

The present invention has been made to solve the problems of the prior art described above, and its purpose is to make it possible to control the rotational load of the winding shaft and to make it possible to control the voltage to the rewinding motor precisely. Another object of the present invention is to provide a film retrieval device that facilitates retrieval work.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a roll film is wound around a take-up reel and a rewind reel and passed, and the take-up reel or the rewind reel is driven. This is a film search device that searches for a desired film frame by rotating or stopping in response to a signal or a stop signal, and includes a fine adjustment knob connected to the winding shaft of a take-up reel, and rotation of the fine adjustment knob. A film retrieval device comprising a motor drive circuit that detects and amplifies a voltage output from a take-up remoter connected to a take-up reel and inputs the voltage to a rewind remote that drives a rewind reel. A load mechanism that can be turned on and off to apply a rotational load to the winding shaft, a detection means that detects the stop signal, and a control mechanism that turns on the load mechanism when the detection means detects the stop signal. are doing.

(Function) When the motor is stopped, by applying a load to the winding shaft to which the fine adjustment knob is connected, the fine adjustment knob rotates slowly and the winding shaft also rotates slowly. Therefore, it is possible to prevent the rotation of the unwinding shaft from being unable to follow the rotation of the winding shaft. Further, when the fine adjustment knob is not rotated, a braking action is generated, which prevents the film from being fed. Therefore, even if you do not precisely adjust the voltage input to both motors depending on the film winding diameter, the film may sag or
This prevents troubles such as being sent to another location and makes adjustment work easier.

(Example) In FIG. 1, an opening 2 is provided on the side of a cartridge I, and a film F is fed out from the opening 2 to a take-up reel 3 and wound thereon.

Rewind reel in cartridge 1 (see Figure 7 105)
A rewind motor 5 is directly connected to the rewind shaft 4, and by inputting a drive signal REW from a control circuit 6 and coaxially moving the rewind shaft 4 in the direction of arrow A, the film F can be rewound. In addition, by inputting the drive signal FF from the control circuit 6 to the winding remoter 8 directly connected to the winding shaft 7 and rotating it in the direction of arrow E,
Film F can be wound. In addition, the rewind motor 5
When stopping the drive of the winding side motor 8, the motor 5.8 is decelerated and stopped by inputting the stop signals REW and FF. Rubber rollers 9 and 9', which are film guide rollers, are in contact with the film F and rotate smoothly on the film without slipping. An encoder 10 is provided on the rotating shaft of one rubber roller 9'.
A fine adjustment knob 11 is provided on the front side of the zero-winding shaft 7 that detects the amount and direction of rotation of the rubber roller 9', that is, the amount and direction of conveyance of the film F. The back side for fine adjustment of film F is created. Furthermore, a friction mechanism is provided on the rear side to increase the rotational load on the winding shaft 7.

FIG. 3 is an explanatory diagram of the friction mechanism.

A friction member 13 is bonded to the friction arm 12, and by pressing this friction member 13 against a drum 15 provided on the winding shaft 7 by suction from a solenoid 14, the rotational load on the winding shaft 7 is increased.

When the solenoid is not attracted, the friction member 13 is moved by the spring 16.
It is configured to be separated from the drum 15 by.

Further, between the guide plates 17 and 17', a lamp 18 and lenses 19, 20 . An optical system including a reflecting mirror 21 and the like is provided to project images of film frames onto a screen 22.

Next, the operation will be explained. 0 When the film stop mode was output from the operation unit (not shown), stop signals REW and FF were input from the control circuit 6 to the rewind motor 52 and the take-up remote motor 8 to stop the film F. Immediately thereafter, the solenoid 14 is brought into a suction state to increase the rotational load on the winding shaft 7. In the fine adjustment circuit shown in FIG. 2, the CPU outputs a fine adjustment drive signal from the P4 terminal. As a result, the rewind motor is connected to the fine adjustment circuit and the take-up remote motor is short-circuited via resistor R4. When the fine adjustment knob 11 is rotated in this state, the rotation direction of the fine adjustment knob 11 is detected by the encoder 10.

When the fine adjustment knob 11 rotates in the direction of arrow H in the figure, the film F is fed in the direction of arrow G, and since the winding remoter 8 is in a closed circuit with R4, a negative electromotive force is applied to R4. occurs. The negative electromotive force is fed back to Q26 of the fine adjustment circuit and amplified. This amplified output is 932
．． Q31 is activated to rotate the rewind motor 5.

When fine adjustment knob lf is stopped, R4 in the fine adjustment circuit
no electromotive force is generated.

When the fine adjustment knob 11 is rotated in the direction of arrow 1, the film F is fed in the direction of arrow G', and a positive electromotive force is generated at R4. This electromotive voltage is fed back to Q26 of the fine adjustment circuit and amplified. This amplified voltage is Q32.
Q31 is only slightly operated, and the rewind motor 5 acts as a brake against the rotation of the fine adjustment knob on the winding side. Then, when the film stop 1 mode is not outputted from an operation section (not shown), that is, when the film transport mode is outputted, the solenoid 14 is brought into a non-suction state and the rotational load on the winding shaft 7 is reduced. A flowchart of the control circuit 6 in the above operation is shown in FIG.

(Other Examples) In the above example, immediately after stopping the rotational drive by the motor and stopping the film F, the solenoid 14 was put into the suction state to increase the rotational load on the take-up shaft 7. In order to prevent the film F from being fed when the fine adjustment knob 11 is not rotated when the motor is stopped, another means can be provided to precisely adjust the voltage input to the motor according to the film winding diameter. , the solenoid 14 may be brought into the suction state only when the fine adjustment knob 11 is being rotated to increase the rotational load on the winding shaft 7.

That is, in the configuration of this embodiment, when it is detected that the film F is fed by the encoder 10 with the film stop mode being outputted from the operation unit (not shown), the solenoid 1/noid 14 is brought into the suction state, The rotational load on the winding shaft 7 is increased, and when the encoder 10 detects that the film F has stopped, the solenoid 14 is brought into a non-suction state to reduce the rotational load on the winding shaft 7.
FIG. 5 shows a flowchart of the control circuit 6 in the above operation, which only needs to control U.

In addition, if another means is provided that can precisely adjust the voltage input to the motor according to the film winding diameter so that the film F does not sag when the fine adjustment knob 11 is rotated, the film F may be stopped. Solenoid 14 only when
may be placed in a suction state and the rotational load on the winding shaft 7 may be increased.

That is, in the configuration of this embodiment, only when the encoder 10 detects that the film F has stopped with the film stop mode being output from the operating section (not shown), the solenoid 14 is brought into the suction state and the winding is started. The CPU may be controlled to increase the rotational load on the take-up shaft 7.

A flowchart of the control circuit 6 in the above operation is shown in FIG.

(Effects of the Invention) As explained above, by providing a mechanism that increases the load of rotation of the winding shaft when the motor is stopped, input is input to both the winding remoter and the rewinding motor. Even if you do not have to adjust the voltage precisely depending on the film roll diameter, the fine adjustment knob rotates slowly and the brake action eliminates problems such as the film sagging or being fed. This has the effect of making the work easier.

[Brief explanation of drawings]

FIG. 1 is a perspective view for explaining a first embodiment of the film search device of the present invention, FIG. 2 is a circuit diagram of a motor control circuit,
Figure 3 is an enlarged front view of the friction mechanism in Figure 1;
Fig. 4 is a flowchart of control in the first embodiment, Fig. 5 is a flowchart of control in the second embodiment, and Fig. 6 is a flowchart of control in the third embodiment.
FIG. 7, which is a flowchart of the control of the embodiment, is a schematic configuration diagram of a conventional film retrieval device. Explanation of symbols 1... Cartridge 5... Rewind motor 7...
Take-up reel 8...Take-up motor 11...Fine adjustment knob 105...Rewind reel F...Film Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] By winding a roll film around a take-up reel and an unwinding reel, and driving or stopping the take-up reel or unwinding reel in response to a drive signal or a stop signal,
This is a film search device that searches for a desired film frame, and includes a fine adjustment knob connected to the take-up shaft of the take-up reel, and an output from the take-up motor connected to the take-up reel when the fine adjustment knob is rotated. detects and amplifies the voltage
A film retrieval device comprising a motor drive circuit that inputs an input to a rewind motor that drives a rewind reel, and a load mechanism that can be turned on and off to apply a rotational load to the take-up shaft of the take-up reel, and a stop signal that outputs the stop signal. A film retrieval device comprising: a detection means for detecting a stop signal; and a control mechanism for turning on the load mechanism when the detection means detects a stop signal.