JPS586864A - Automatic playing out unit for film - Google Patents

Abstract

PURPOSE:To make it possible to play out film securely by installing a drive roller to the outside periphery of film wound into a cartridge in such a way that the drive roller may freely contact or be separated from the outside periphery of the film and by playing out the tip of film with the drive roller in an automatic cartridge loading unit for projector film. CONSTITUTION:When a cartridge 3 is iserted into a cartridge insertion nozzle 2 for projector, an electromagnet M is demagnetized and a roller 4 is located at a position indicated by dotted lines. When the cartridge 3 is thoroughly inserted, the roller 4 is pulled by the electromagnet M through a spring and pressed against the outside periphery of a film 21. The film 21 is rotated in the arrow direction by the drive roller 4 with the operation of a projector. Then, the end of the film is inserted into an insertion nozzle 11 through a film outlet 24 and is clamped with a sprocket 12 and a pressure roller 13 and is fed to a guide roller 18. This construction makes it possible to prevent a loosened film and play out the film to the film insertion nozzle without fail.

Description

Detailed Description of the Invention This invention is applicable to cartridge-type film projectors, etc., which automatically pull out the final end of a spirally wound film or tape in a cartridge and load it into a projector, etc. This relates to an automatic feeding device 1.

Conventionally, in this type of device, when a film or tape that has been projected or played once is rewound in the cartridge,
Make sure that the final end of the film or tape does not wind up freely inside the cartridge, and stop the final end of the film or tape at a predetermined position on the outside or inside of the cartridge. A device for pulling out the tape is known.However, in such a known device, it is necessary to apply a brake on one reel of the cartridge at the final stage of rewinding to stop the final end of the film or tape at a fixed position. There is.

There is no problem with the above method when the film is small and relatively short, such as an 8 mm film, but when the film becomes a 16 fl film, the mass of the film increases and the rewinding speed becomes faster, so the inertia increases. At the end of rewinding, it becomes difficult to stop the final end of the film, etc., at a predetermined position. If you force yourself to do this once, you may damage the film or make the device larger.

In order to solve the above-mentioned problems, the final end of the film, etc., is not fixed at a specific position, but is rolled up freely. There is also a known method of pulling out a film by driving a wound reel of film, etc.

In such a method, a thinly wound 1
There is a drawback that the tightly wound film, etc. may become loose, and if the film, etc. becomes loose, it is sufficient to pull out the last end of the film, etc. with the first operation, but if this fails, reel 1
Even if a tightly wound film or the like loosens just one bit, it will not be possible to pull out the final end of the film.

The object of the present invention is to solve the above-mentioned drawbacks of conventional cartridge-based projectors and copying machines.

That is, this invention provides 11, @ provided in the cartridge.
By bringing the roller into contact with the outer circumference of the film, etc., and driving this roller, the reel (rolled film, etc.) is rotated in the unwinding direction, and the final end of the film, etc. is separated from the wound film, etc. When loading film, etc., into the automatic loading slot of a projector, etc.
] A feeding device is provided.

Hereinafter, details of the present invention will be explained based on the accompanying drawings.

FIG. 1 is a side view of a cartridge-type projector embodying the present invention, in which a cartridge insertion section 2 is provided at the top of the projector body 1, and a cartridge insertion section 2 is provided therein for inserting a cartridge 3 therein.
It's happening.

Reference numeral 4 denotes a drive roller provided at the rear inside the cartridge insertion section 2. This roller 4 is attached to the upper end of an arm 5, and the lower end of this arm 5 is attached to a single shaft 6 (thereby, a single insertion portion 21 is attached so as to swing back and forth), as shown in FIG.

As shown in FIG. 3, the other end of the shaft 7 of the roller 4 is fixed with a single-groove pulley 8, and the roller 4 is driven by a drive belt 91.
When the electromagnet M is demagnetized, the roller 4 is in the position □ shown by the chain line in FIG. 2, and when the electromagnet M is energized, it is pulled toward the cartridge 3.

Reference numeral 11 denotes an automatic loading insertion slot which is attached to the main body 11 at the bottom of the insertion section 2, and there are guides at the front and rear of it.

A sprocket 12 and a pressing roller 13 are arranged in the lower part of this insertion opening 11, and a lower guide 14 is provided from the lower part of the sprocket 12 to the rear.
An upper guide 15 is provided at the rear of 2.

Reference numeral 16 denotes a reel drive roller disposed in the middle of the lower part of the cartridge insertion section 2. Its shaft 17 is driven by an appropriate power and is moved up and down by the action of an electromagnet and a spring.

Further, a guide roller 18 is provided on the inner side of the rear end of the upper guide 15, and an aperture 19 is provided below the guide roller 18.

A reel 2o with one rotary index is attached within the cartridge 3, and a film 21 is wound around this reel 20. Note that 22 in FIG. 1 is a film take-up reel provided at the rear of the main body 1, and the rest of the structure is the same as that of a conventional projector, but a description thereof will be omitted.

This invention has the above configuration, and its operation will be explained below.

First, insert the cartridge 3 into the cartridge insertion section 2 of the projector.
When the cartridge 3 is inserted from above, the electromagnet M is demagnetized and the roller 4 is at the tilt position, and when the cartridge 3 is completely inserted into the insertion section 2, the electromagnet M The film 21 is pulled by the spring 10, and the elasticity of the spring 10 presses the film 21 to the outside with an appropriate force.

When the projector is operated in this state, the roller 4 is driven in the direction of the arrow in FIG. The film enters through the film outlet 24 of the cartridge 3 into the insertion slot 111 (similar to a known self-winding loading device), enters between the sprocket 12 and the holding roller 13, and is fed out from the sprocket 121 into the film guide 14. The film is fed into the aperture 19 through the winding reel 18, and is finally wound onto the winding reel 22, where projection begins.

In the above-mentioned film drawing operation 1, when the film 21 is drawn out and the film 21 is fed by the sprocket 12 and rollers (11 provided on the projector body), an electromagnet or the like is actuated to move the arm 5 by the spring 10+. 1 so that the roller 4 is rotated outward against the film 21 and separated from the film 21.
Good to rub.

From the above-mentioned start of projection to during projection, the reel drive roller 16 moves down one step as shown by the solid line in FIG.
When the aperture 19 is opened and the rewind switch is turned on, the film 21 that comes out of the take-up reel 22 moves backward along the projection path and is rewound to the reel 20+ in the cartridge 3.

That is, when the rewind switch is turned on, the reel drive roller 16 rises due to the action of an electromagnet, etc., and presses the flange of the reel 20 from the opening at the bottom of the cartridge 3, as shown by the chain line in FIG. Rotating clockwise in the direction of the drawing drives the reel 20 in the unwinding direction.

This invention is as described above.
A roller 4 is placed around the outer periphery of the film 21 which is being rewound by
Since the film 21 is rotated by crimping the film 21, no matter where the final end 23 of the film 21 is in the cartridge 3, when this end 23 is turned downward, it will hang down due to its own weight, and the cartridge 3 The film is guided into the film insertion slot 11 of the main body 1 from the film outlet 24 near the lower front part of the main body 1.

Therefore, when rewinding the film 21, the end of the film 21 is pulled into the cartridge 3 (whichever position it is returned to and the brake device is not needed at the end of the process).In addition, in the case of this invention, the drive roller 4 When feeding the film, the direction in which the spiral-shaped film is tightened (this direction prevents the film 21 from loosening, and also
If the end 23 does not come out of the film outlet 241 during rotation, the end 23 will return to its original position and head toward the exit 24, so it will always be guided from the exit 24 to the film insertion slot 11. There is.
Although the embodiment uses a projector that uses film, the same applies to the case where tape is used.

[Brief explanation of the drawing]

FIG. 1 is a side view of a projector implementing the device of this invention;
FIG. 2 is an enlarged longitudinal sectional side view showing the main parts of the same as above, and FIG. 3 is a partially enlarged longitudinal sectional rear view. 1...Main body, 2...Cartridge insertion part, 3...
Cartridge, 11... Insertion slot for film, etc., 20
...Reel, 21...Film. Patent applicant: Eiki Kogyo Co., Ltd.

Claims (1)

[Claims] A cartridge-type automatic loading device 1 consists of a main body having a cartridge insertion part into which a cartridge containing a reel for winding a spiral film or tape is inserted, and the cartridge enters the opening of the cartridge and winds a reel. The main body 1 is a drive roller that presses the outer circumference of a film or tape that has been removed, rotates the film or tape in the feeding direction, guides its tip from the outlet of the cartridge to the insertion slot for film, etc. in the main body, and then exits the cartridge. This is an automatic feeding device for film, etc.