JPH07295111A - Film feeding controller - Google Patents

Abstract

PURPOSE:To provide a film feeding controller capable of preventing a film from being bent or cut in a cartridge. CONSTITUTION:The device for feeding or winding the film A from the inside of the cartridge 9 is constituted of a spool rotating shaft 2 engaged with a spool 8 fitted into the film in the cartridge 9 to rotate the spool 8, a rotary shaft holder 4 provided with an engaging mechanism for engaging the spool rotating shaft 2 so as to enable it to be displaced inside, a motor 6 connected to the rotary shaft holder 4 via a motor rotating shaft 5 and a detector 7 such as a limit switch detecting the displacement of the spool rotating shaft 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feed-out control device useful for photoprinting a film in a cartridge.

[0002]

2. Description of the Related Art Conventionally, when photo-printing a film containing a cartridge, the film in the cartridge mounted on the spool is rotated out of the cartridge by rotating the spool in the feeding direction opposite to the film winding direction. An apparatus has been proposed in which the film is rewound into the cartridge again after performing the scanning and printing operations.

[0003]

However, when the film is fed from the cartridge or rewound, the leading end of the film is caught in the film entrance / exit of the cartridge due to the shape of the leading end of the film or the like. Further, when the spool is forcibly rotated in the feeding direction or the winding direction, the film may be bent or cut in the cartridge.

The present invention was developed in order to solve the above problems, and its purpose is to:
An object of the present invention is to provide a film feeding control device capable of preventing the film from being broken or cut in the cartridge.

[0005]

In order to achieve the above object, the present invention has the following construction. That is, the structure of the present invention as set forth in claim 1 is, in an apparatus for feeding or winding a film from a cartridge, a spool rotating shaft which engages with a spool having a film mounted therein to rotate the spool. When,
A rotary shaft holder internally provided with an engaging mechanism for displaceably engaging the spool rotary shaft, a motor connected to the rotary shaft holder via a motor rotary shaft, and a displacement of the spool rotary shaft is detected. And a detector such as a limit switch.

The structure of the present invention according to claim 2 is
In a device for feeding or winding a film from the inside of a cartridge, a spool rotating shaft for engaging the spool mounted with the film in the cartridge to rotate the spool, and the spool rotating shaft are displaceably engaged. A rotary shaft holder having an engaging mechanism therein, a motor connected to the rotary shaft holder via a motor rotary shaft, and a detector such as a limit switch for detecting displacement of the spool rotary shaft. An engagement mechanism for displaceably engaging the spool rotation shaft is configured such that the rotation shaft holder and the spool rotation shaft are loosely fitted, a screw portion is provided at a tip end portion of the spool rotation shaft, and the screw portion is provided. A flange in which a threaded portion to be screwed with is provided in the rotary shaft holder, and the other end of a compression spring having one end locked to a support portion in the rotary shaft holder is provided on the spool rotary shaft. The spool rotation shaft can be rotated synchronously with the rotation shaft holder fixed to the motor rotation shaft by pressing the end of the rotation shaft holder toward the cartridge via the rotation shaft holder. The spool rotation shaft can be screwed to the motor side against the biasing force.

[0007]

In the above-described structure of claim 1, the rotation of the motor causes the motor rotation shaft, the rotation shaft holder, the engagement mechanism,
The film is sent from the cartridge through the spool rotation shaft and the spool. (Or, the film is wound up in the cartridge.) In this case, when an abnormality occurs in the rotation of the spool, the spool rotating shaft is displaced by the engaging mechanism, and this displacement is detected by a detector such as a limit switch, The drive of the motor is stopped to prevent the film from being broken or cut due to a film jam in the cartridge.

Further, in the structure of claim 2 as described above,
Similarly to the above, the rotation of the motor normally feeds the film from the cartridge through the motor rotation shaft, the rotation shaft holder, the engagement mechanism, the spool rotation shaft, and the spool, or winds the film into the cartridge. When an abnormality occurs in the rotation of the spool, the spool rotation shaft pressed against the cartridge side in the rotation shaft holder by the compression spring via the flange is It gradually displaces (moves) to the motor side via the threaded portion. When the rotation of the spool is stopped, the threaded portion of the spool rotation shaft is completely drawn into the threaded portion of the rotation shaft holder. At this time, the displacement of the spool rotation shaft is detected by a detector such as a limit switch, and the driving of the motor is stopped to prevent the film from being broken or cut due to film clogging in the cartridge.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a film feed-out control device according to an embodiment of the present invention.
It is composed of a spool rotation shaft 2, a rotation shaft holder 4 having an engagement mechanism 3 therein, a motor rotation shaft 5, a motor 6, a detector 7, and the like.

More specifically, the spool rotation shaft 2 is engaged with the spool 8 on which the film A is mounted,
The film A in the cartridge 9 is rotated in the feeding direction. A flange 10 is provided near the spool 8 of the spool rotation shaft 2. The flange 10 operates the detector 7 described later.

The spool rotating shaft 2 is loosely fitted in the rotating shaft holder 4 so as to be inserted from the cartridge side end 4a. A motor rotating shaft 5 is fixed to the other end 4b of the rotating shaft holder 4, and the motor rotating shaft 5 is connected to a drive shaft 12 of a motor 6 via a coupling 11.

The engaging mechanism 3 provided in the rotary shaft holder 4 has the following structure. That is, at the portion of the spool rotation shaft 2 inserted into the rotation shaft holder 4 described above,
A flange 13 is provided near the end 4 a of the rotary shaft holder 4 on the cartridge side. A male screw portion 14 is formed from the flange 13 to the tip of the spool rotating shaft 2. The male screw portion 14 is adapted to be screwed into a female threaded portion 15 provided on a central support portion 16 in the rotary shaft holder 4. A compression coil spring 17 is provided between the flange 13 and the support portion 16, and the compression coil spring 17 allows the flange 13 of the spool rotation shaft 2 to move.
Is pressed against the cartridge-side end 4a of the rotary shaft holder 4 by elastic biasing, and is fixedly connected to the rotary shaft holder 4 that rotates with the rotation of the motor 6.

A detector 7 including a limit switch is arranged near the cartridge side end 4a of the rotary shaft holder 4 and engages with the flange 10 of the spool rotary shaft 2 via an actuator 18. There is.

In the film feeding control device 1 having the above-described structure, when the spool 8 is normally rotating, the spool 8 is rotated by the dynamic torque together with the motor rotating shaft 5 which is rotated by the drive of the motor 6. To do. When the rotation of the spool 8 is prevented by clogging of a negative film or the like, the spool rotating shaft 2 fixed to the cartridge side end 4a of the rotating shaft holder 4 via the flange 13 by the compression coil spring 17 is Compression coil spring 17
The male screw portion 14 is screwed to the female threaded portion 15 side of the rotary shaft holder 4 against the elastic bias of the. As a result, the spool rotation shaft 2 is displaced (moved) toward the motor 6 side, and the flange 1
0 also moves to the motor 6 side. The flange 10 presses the actuator 18 of the detector 7 to operate the detector 7 and stop the rotation of the motor 6. This makes it possible to avoid film breakage and film cutting.

[0015]

As described above, in the film feed-out control device of the present invention as described in claim 1, the spool rotation shaft is utilized to automatically connect and fix the spool rotation shaft to the motor rotation shaft. The rotation shaft holder 4 is engaged with the engaging mechanism to be displaced (moved) to the motor side, and this displacement can be detected by the detector to stop the motor. Therefore, the film is bent or cut in the cartridge. It is possible to prevent such troubles.

Further, according to the second aspect of the present invention, when an abnormality occurs in the rotation of the spool, the spool rotation shaft fixed to the cartridge side in the rotation shaft holder by the compression spring via the flange is the spool rotation shaft. Through the threaded portion of the rotary shaft and the threaded portion of the rotary shaft holder, the motor is gradually displaced (moved) to the motor side, and the displacement of the spool rotary shaft at this time is detected by a detector such as a limit switch. Since the driving of the motor can be stopped, it is possible to prevent the film from being broken or cut due to a film jam in the cartridge.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a film feeding control device according to an embodiment of the present invention.

[Explanation of symbols]

 1 Film Feeding Control Device 2 Spool Rotating Shaft 3 Engaging Mechanism 4 Rotating Shaft Holder 5 Motor Rotating Shaft 6 Motor 7 Detector 8 Spool 9 Cartridge 14 Screw Part (Male Screw Part) 15 Screw Cutting Part (Female Screw Cutting Part)

Claims (2)

[Claims] 1. A device for feeding or rewinding a film from a cartridge, wherein a spool rotation shaft for engaging a spool mounted with the film in the cartridge to rotate the spool, and displacing the spool rotation shaft. A rotary shaft holder internally provided with an engaging mechanism for enabling possible engagement, a motor connected to the rotary shaft holder via a motor rotary shaft, and a detector such as a limit switch for detecting displacement of the spool rotary shaft. A film feed-out control device comprising: 2. A device for feeding or rewinding a film from a cartridge, wherein a spool rotation shaft that engages with a film-mounted spool in the cartridge to rotate the spool, and the spool rotation shaft is displaced. A rotary shaft holder internally provided with an engaging mechanism for enabling possible engagement, a motor connected to the rotary shaft holder via a motor rotary shaft, and a detector such as a limit switch for detecting displacement of the spool rotary shaft. The engaging mechanism that displaceably engages the spool rotation shaft loosely fits the rotation shaft holder and the spool rotation shaft, and provides a threaded portion at the tip of the spool rotation shaft. At the same time, a threaded portion to be screwed with the screw portion is provided in the rotary shaft holder, and the other end of the compression spring whose one end is locked to the support portion in the rotary shaft holder is
The spool rotation shaft is pressed by pressing the end of the rotation shaft holder on the cartridge side through a flange provided on the spool rotation shaft.
It is possible to rotate synchronously with a rotary shaft holder fixed to the motor rotary shaft, and, when the spool rotary shaft is overloaded, the spool rotary shaft can be screwed toward the motor side against the elastic bias of the compression spring. A film feeding control device having the above structure.