JPS59227652A - Sheet taking-up apparatus - Google Patents

Abstract

PURPOSE:To improve the durabillty for the repetition of sharp revolution and stop and for high-speed revolution by permitting the always stable taking-up completion signal to be taken-out, by installing a taking-up detection means for a sheet to be taken-up onto a taking-up shaft, onto a sheet guiding member. CONSTITUTION:The top edge of a film sent into a taking-up roller 12 is guided by a movable lever 14 along a guide plate 13 and pushed onto a core part 18 by a guide roller 16. When a film F is taken-up onto a core 18 and positioned between a sensor 23 and the core 18, the light transmitted from a luminous part 24 is reflected by the film F and produced into a light receiving part 25, and a taking-up completion signal is transmitted. The power supply to a motor is suspended by said completion signal, and a solenoid 9 is set inoperative, and a capstan roller is stopped and separated from a microfilm, and the film F is supplied into a reel 12 successively by the motor. Since the detection means is not directly fixed onto the taking-up core, the number of revolution of the taking-up reel can be increased.

Description

[Detailed Description of the Invention] The present invention relates to a winding device that winds a long sheet such as a film or tape around a winding shaft, and more specifically, a detection system that detects when a sheet is wound around a winding shaft. The present invention relates to a sheet winding device equipped with means.

Conventionally, this type of device has a take-up core 1 of a take-up reel that is hollow as shown in FIG. The microswitch is caused to protrude outside through a hole 4 provided on the outer periphery of the take-up core, and this microswitch is rotated together with the take-up reel.
When the microfilm F is wound around the outer periphery of the winding core 1, the movable contact 6 of the microswitch 2 is pressed by the film, thereby activating the microswitch 2 and generating a winding completion signal from the microswitch 2. was.

However, in order to send the winding completion signal output from the microswitch 2 rotating together with the winding core 1 to the electrical circuit of the device main body, a mechanical contact such as a sliding brush is required to connect the microswitch and the device main body. It is necessary to connect the film to a circuit, and due to poor contact due to wear of the contacts, it is not possible to obtain a stable winding completion signal, which often causes problems in film feeding.

In addition, since the microswitch rotates together with the winding core, repeated sudden rotations and stops can cause the microswitch itself to malfunction, and there is also the disadvantage that the winding core cannot rotate at a very high speed. Ta.

The present invention eliminates the drawbacks of the conventional example described above, and provides a take-up device that can sufficiently withstand high-speed rotation of the take-up reel and also makes it possible to increase the sheet feeding speed.

The present invention will be explained below using specific examples shown in the drawings.

FIG. 2 shows a film feeding section of a film leader to which the present invention is applied.

In the same figure, 5 is a film supply cartridge that stores microfilm F in a roll, and 6 is a cartridge 5.
7 is a feeding motor for rotating the capstan roller 6; 8 is a film reverse motor for rotating the film spool in the cartridge; 9 is a motor for rotating the capstan roller 6; This is a solenoid that moves the microfilm F to a position where it comes into contact with the microfilm F and a position where it moves away from the microfilm.

io, 1i are film guide rollers, 12 is a take-up reel, 15 is a fixed guide plate arranged on the main body of the device along the circumference of the take-up reel 12, 14 is a movable lever rotatable about the shaft 15 as a fulcrum; 16 is a rotatable film winding guide roller provided at the tip of the lever 14, and 17 is a coil spring that rotates the movable lever 14 clockwise.

The lever 14 is biased by the action of a coil spring 17 so that the guide roller 16 approaches the core portion 18 of the take-up reel 12 .

19 is a film forwarding motor for rotating the take-up reel 12; 20 is a lamp for illuminating the film; 21 is a condenser lens; 22 is for enlarging and projecting the image of the film illuminated by the lamp 20 onto a screen (not shown). It is a projection lens.

Although not shown, a guide plate is provided between the cartridge 5 and the take-up wheel 120 to guide the film to a predetermined path.

In the reader, when the motor 7 is driven and the solenoid 9 is activated, the capstan roller 6 rotates and moves to a position where it contacts the microfilm F. Due to the contact between the capstan roller 6 and the microfilm, the leading edge of the film is fed out from the cartridge 5, and the film F is wound along a predetermined path +7-/I'
12.

Before the leading edge of the film reaches the take-up reel 12, the motor 19 is driven and the take-up reel 12 rotates in the direction of the arrow.

The leading edge of the film sent to the take-up roll 12 is guided by a fixed guide plate 13, moves along the guide plate 13, is then guided by a movable lever 14, is pressed against a core part 18 by a guide roller 16, and is automatically rotated. When the film is wound around the winding core 18, a winding completion signal is generated from a winding detector, which will be described later.

FIG. 3 is a perspective view schematically showing a winding detector according to the present invention. The detector consists of a light reflection type sensor 26 composed of a light emitting part and a light receiving part, and is arranged at the tip of the movable lever 14. . The light receiving section is composed of a photoelectric conversion element.

FIG. 4 is a diagram showing details of the wrapping detector. Here, 2
Reference numerals 4 and 25 denote a light emitting part and a light receiving part of the light reflection type sensor 23, which are mounted so as to face the center of the winding core. 26 is a groove provided on the circumferential surface of the winding core 18, and the source from the light emitting part 24 of the light reflection type sensor 26 is this groove 26.
It is projected towards.

In the above-described configuration, when the film is not wound around the winding core 18, the light emitted from the light emitting section 24 is transmitted through the groove 2.
It hits the bottom surface 27 of 6 and is reflected, but the light receiving part 25 and the bottom surface 2
Since the distance 7 is too large, the reflected light does not reach the light receiving section 25.

Next, the film F is wound around the take-up core 18 as shown in FIG.
When the film is positioned between the sensor 26 and the winding core 18 at i, the light emitted from the light emitting section 24 is reflected by the film F and enters the light receiving section 25, and the winding completion signal is output from the light receiving section 25. occurs.

This winding completion signal cuts off the power supply to the motor 7 and deactivates the solenoid 9, thereby stopping the rotation of the capstan roller 6 and moving the capstan roller 6 to a position away from the microfilm. do.

Thereafter, the film F is sequentially fed to the take-up reel 12 by the motor 19.

Next, when the motor 19 is stopped and the motor 8 which rotates the film spool in the cartridge 5 is driven, the film F is rewound into the cartridge 5. In other words, it is sent backwards.

Note that the movable lever 14 may be moved in the direction away from the winding core 18 by a solenoid or the like when the winding completion signal is output from the sensor 26 or after that.

The arrangement positions of the movable lever 14 and the sensor 26 are not limited to those in the embodiment. Further, a plurality of movable levers may be provided around the winding core, and a sensor may be provided at an appropriate position of any movable lever.

Furthermore, the winding detector is not limited to an optical sensor, and a microswitch or other sensor can be used.

As explained above, since the present invention provides the winding detection means in the sheet guide member, it is possible to always obtain a stable winding completion signal.
I can put it out. In addition, since the detection means is not directly fixed to the take-up core, there is no problem of unstable generation of the winding completion signal due to contact failure as in conventional cases, and there is no problem even if the rotation speed of the take-up reel is controlled. There is no.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional example of a wrap detection device, FIG. 2 is a configuration diagram of a film leader to which the present invention is applied, FIG. 3 is a perspective view schematically showing a wrap detector according to the present invention, and FIG. The figure is a sectional view of the wrapping detector.

Claims (1)

[Claims] A detection means for detecting that the sheet is wrapped around the take-up shaft,
A sheet winding device characterized in that the sheet winding device is disposed on a member that guides the sheet to a winding shaft.