JPH01214834A - Film retrieving device - Google Patents

Abstract

PURPOSE:To reduce load on a takeup reel side in a simple constitution when a film is rewound and to prevent slack by releasing the coupling of a coupling mechanism provided between the takeup reel and its rotation driving means when the film is rewound into a cartridge. CONSTITUTION:A motor 70 as a rotation driving means is provided for the takeup reel 6, the motor being rotatable in both directions shown by arrows E and F. Between the rotary shaft 71 of the motor 70 and the takeup reel 6 is provided with a one-way bearing 72 as the coupling mechanism. In the takeup of the film F', the bearing 72 rotates the takeup reel 6 in the direction shown by an arrow B (in the direction in which the film is taken up) when the rotary shaft 71 is rotated in the direction shown by the arrow E (in the direction in which the film is taken up); in the rewind of the film F', the bearing is arranged not to transmit driving force when the rotary shaft 71 rotates in the direction, shown by the arrow F, in which the film is fed. Thus, the driving force is not transmitted to the takeup reel 6, and it brings about the condition in which the reel runs idly.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a device for extracting film from a roll of film such as microfilm and searching for frames thereof, and in particular for a device for extracting film from a roll of film such as microfilm and searching for frames thereof. The present invention relates to a device for searching for a type of film.

(Prior Art and Problems) Conventionally, a device shown in FIG. 3 is known as a device for searching a roll film (hereinafter referred to as a roll film) such as a microfilm stored in a cartridge. This device winds a film F pulled out from a roll film stored in a cartridge L onto a take-up reel 6 via a known film kite roller 4 or the like.
After that, the take-up reel 6 and the rewind reel 2 in the cartridge l
While rotating 0 alternately in the B direction and the 6 directions,
An optical system consisting of a light source 7, lenses 8, 9, etc. is used to search film frames.

A partially cut away perspective view of the cartridge I is shown in FIG. The cartridge l as described above is provided with a notch 12 at the upper right corner in the figure, and when feeding the roll film, a roller 2 made of rubber or the like rotated by a motor (not shown) is inserted into this notch 12. The roller 2 is brought into contact with a wide roller tape F' that is attached to the tip of the film F that rides up on the circumferential surface of the flange portions 21 and 22 of the rewind reel 20, and the rewind reel 20 is fed out. The roll film is fed out from the tip by rotating it in the opposite direction.

However, when the film frame search was completed and film F was being rewound into cartridge L, the load on the winding side (
The film F is pulled in the direction of the take-up reel due to the load on the take-up reel, motor, etc.
' or flange 21.
22 is pushed out to both sides. As a result, the expanded flanges 21, 22 are pressed against the side wall of the cartridge 1, causing a situation in which the rewind reel 20 no longer rotates.

Therefore, there has conventionally been a device in which a motor (not shown) on the take-up reel 6 side is reversely rotated to the rewind side to reduce the load on the take-up reel side and prevent the roller tape F from being wedged.

However, in the conventional device described above, since the take-up reel 6 or the roll film is forcibly fed out, if the speed on the take-up reel side is high, the film F becomes slack in the conveyance path or reel. The problem is that the film F is scratched due to collision with the guide surface of the conveyance path, and the film F
When the slack is large, the problem arises that the film F jumps out of the conveyance path and the film F may be folded. Furthermore, in order to match the rewinding speed of the rewinding reel 20 in the cartridge with the feeding speed of the take-up reel 6, a new control circuit etc. must be provided, making the device complicated and expensive. Put it away.

(Means for Solving the Problems) The present invention solves the problems of the above-mentioned device and reduces the load on the take-up reel when rewinding the film into the cartridge with a simple configuration. It is an object of the present invention to provide a film retrieval device that does not cause the film to sag.

In order to achieve the above object, the present invention involves pulling out the leading end of a roll film stored in a cartridge, winding it around a take-up reel disposed at a predetermined distance from the cartridge, and winding the film on the take-up reel or inside the cartridge. In a film search device that searches for a desired film frame by rotationally driving a return reel, a coupling mechanism is disposed between the take-up reel and the take-up reel rotation drive means, and the coupling mechanism rotates the roll film. configured to be connected and uncoupled upon rewinding into the cartridge.

(Example) Hereinafter, an example of the present invention will be described based on the attached FIGS. 1 and 2. FIG. 1 is a perspective view showing the overall configuration of an apparatus according to an embodiment of the present invention.

Further, the same reference numerals are given to the same parts as in FIGS. 3 to 5 showing the conventional apparatus described above, and the same explanation will be omitted.

In FIG. 1, an opening 15 is provided in the side of the cartridge L, and a roller tape F' is shown being fed out from the opening 15. In the notch 12 of the cartridge 1, a rubber roller 2 rotated by a motor 3 in the direction of the arrow is in contact with the circumferential surface of the flange of a rewind reel 20 (see FIG. 4) inside the cartridge 1. The motor 3 and rubber roller 2 are rotatable back and forth in the direction of arrow C by means not shown, and are brought into contact with the circumferential surface of the flange of the rewind reel 20 only when feeding out the roll film. There is.

Further, a motor 1 is placed at a rear position of the motor 3 and rotates the rewind reel 20 in the cartridge L in the direction A during rewinding.
3 are arranged.

In addition to known guide rollers 4, 4, a guide plate 5.5 is provided as a guide for reliably conveying the fed film F to the take-up reel 6, which is arranged at a predetermined interval. An optical system consisting of a lamp 7 serving as a light source, a lens 8.9, a reflecting mirror IO, etc. is arranged between the kite plates 5.5.

The take-up reel 6 is provided with arrows E and F as rotational drive means.
A motor 70 that can rotate in both directions is provided, and rotates in the E direction during winding and rotates in the F direction during unwinding. A one-way bearing tough 2, which is a type of one-way clutch, is disposed as a coupling mechanism between the rotating shaft 71 of the motor 70 and the winding wheel 6. This one-way bearing 72 is connected to the rotating shaft 71 in the direction of arrow E (film winding direction) when the film F is wound.
When the rotating shaft 71 rotates in the direction of arrow F, the winding wheel 6 is rotated in direction B (film winding direction). Force is not transmitted. That is, when rewinding the film F, the rotating shaft 71 of the motor 70
is set to rotate in the direction of arrow F, but since the one-way bearing 72 is in the direction of release, no driving force is transmitted to the take-up wheel 6, resulting in what is called an idle rotation state. By doing so, the take-up reel 6 can be created in a state where no load is applied to the motor. In addition, in order to maintain the above-mentioned idling state when rewinding is started and the take-up reel 6 rotates in the rewind direction (anti-B direction), the rotating shaft 71 must be at least lower than the rotational speed of the take-up reel 6. Is it necessary to set the rotation speed to be faster?

With the apparatus of this embodiment having the above configuration, after the film frame search is completed, when the film F is rewound to the rewind reel 20 in the cartridge 1, the rotation shaft 7 is located on the take-up reel 6 side.
1 rotates idly in the F direction, the load is only the rotational load of the reel 6, so there is no possibility that the leader tape F° of the film F gets wedged between the flanges 21 and 22 of the rewind reel 20. , it ran onto the flanges 21 and 22, and the rewinding was completed. Moreover, no slack was caused in the film F during rewinding.

Next, another embodiment of the present invention will be explained based on FIG. In the above-described embodiment device, the one-way bearing 72 is used as the coupling mechanism, or in this embodiment, the electromagnetic clutch 80 will be described in the case where it is an electromagnetic one-way clutch. However, the basic configuration of the device of this embodiment is shown in the first illustration.

2, the periphery of the electromagnetic clutch 80, which is a characteristic part, is shown in cross section, and the same reference numerals as in FIG. 1 indicate the same parts.

The electromagnetic clutch 80 is disposed between the motor 70 and the winding wheel 8, and has an electromagnet 81 fixed to the inner surface of the frame 84 inside thereof. The frame body 84 and the rotating shaft 7
A bearing 82 is disposed between the frame body 8 and the frame body 8.
Since the driving force from the rotating shaft 71 does not reach 4, the electromagnet 8
1 is a predetermined position. An iron disk 83 fixed to the rotating shaft 71 within the range of the magnetic force of the electromagnet 81 is disposed between the winding wheel 6 and the rotating shaft 71 . A protruding piece 62 made of iron is provided on the take-up reel 6 through an elastic member 52° so as to face the disk 83, and receives the magnetic force of the electromagnet 81 which is energized when the motor 70E rotates, and the above-mentioned Im8 :
It is designed to be absorbed by l. Since the take-up reel 6 has a bearing 61 interposed between it and the rotating shaft 71, there is almost no load when the protruding piece 62 is apart from the disc 83.

With the configuration of the device of this embodiment, it is possible to create a no-load state without rotating the motor 70 in the reverse direction (rotating in the F direction).

(Effect of the invention) According to the device of the present invention having the above-described special configuration,
Since the roll film inside the cartridge is not subjected to excessive tension or load, the leader tape does not get wedged between the flanges of the rewind reel inside the cartridge. Since there is no need to feed the film, problems such as film folding caused by film sagging do not occur.

[Brief explanation of the drawing]

1 is a perspective view showing an apparatus according to an embodiment of the present invention, FIG. 2 is a partial sectional view of another embodiment of the apparatus, 31'A is a diagram showing the general structure of a conventional apparatus, and FIG. FIG. 3 is a partially cutaway perspective view of the cartridge shown in FIG. 3, and FIG. 5 is a diagram showing how the leader tape is wedged between the reels. 1... Cartridge 6...
......Take-up reel 20-...
・Rewinding F... Film 70... Drive means (motor) 72
;80...Connection mechanism (72...One-way bearing. 80...Electromagnetic clutch)

Claims (2)

[Claims] (1) Pulling out the leading end of the roll film stored in the cartridge, winding it around a take-up reel disposed at a predetermined distance from the cartridge, and rotating the take-up reel or the rewind reel in the cartridge. In the film search device for searching for a desired film frame, a coupling mechanism is disposed between the take-up reel and the take-up reel rotation drive means, and the coupling mechanism is configured to operate when rewinding the roll film into the cartridge. A film retrieval device characterized in that the connection is set to be released. (2) The film retrieval device according to claim (1), wherein the coupling mechanism is a one-way clutch.