JPS5828725A - Film take-up device - Google Patents

Abstract

PURPOSE:To ensure the assured winding of a film around a take-up reel, by turning a guide material toward the center of the take-up reel when the take-up reel turns in the winding direction. CONSTITUTION:Guide members 26 and 27 are supported rotatably around shafts 26a and 27a. An end of each guide member touches a face of a take-up reel 3 via a friction member 26b of rubber, etc. A film is guided by a guide part 20 and reaches the reel 3. When the film is loaded, the reel 3 turns clockwise. The members 26 and 27 move to the positions shown by dotted lines from the positions shown by the 1-dot chain lines while having friction hook with the reel face via the member 26b and around the shafts 26a and 27a. Thus the film is loaded assuredly to a take-up core 3a provided at the tip of the film. When the film is rewound, the reel turns counterclockwise. At the same time, the members 26 and 27 are detached from the circumference surface of the film to facilitate the film rewinding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film winding device, and more particularly to a winding device that winds a film supplied from a supply reel onto a horizontally arranged take-up reel.

Such a film winding device is used, for example, in a movie projector, and the film fed from the supply reel and projected is wound onto the take-up reel. In conventional winding devices, the guiding member is fixed when engaged with the guiding core, so the film to be wound is not necessarily guided towards the center, which may cause jamming or roll away from the take-up reel. There was a problem with it sticking out.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a film winding device that can eliminate the drawbacks of the conventional orange film and easily and reliably wind a film onto a winding reel.

According to the present invention, in order to achieve this object, an arc-shaped film guide part is provided, one end of which is rotatably supported on the outside of the take-up reel, and the other end of which is frictionally engaged with one surface of the take-up reel. The guide member is configured such that when the take-up IJ-le rotates in the take-up direction, the guide member rotates toward the center of the take-up reel, and when it rotates in the unwind direction, the guide member rotates toward the outer periphery of the reel. It was adopted.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

1 and 2 show a projector in which the present invention is used, and in the figures, a film supply reel 2 is arranged in a main body 1 of the projector. A take-up reel 3 for winding the film is arranged coaxially with the supply reel 2.

The film 4 pulled out from the supply reel 2 is detected by a first sensor 5 provided at the top of the projector for detecting film, and the projector 1 is thereby started. Thereby, the film passes through the film guide section 7 by the feed roller 6, and then passes through the film supply sprocket 8 and the gate section 9. The loop setter 10 is supported by a +-SU loop setter 10, and when the passage of the film is detected by the first sensor 5 (3), the loop setter 10 is set from the upper position to the position shown in FIG. It forms a loop and facilitates the passage of the film.

A projection lamp 11 and a scraping claw 12 are arranged behind the gate section 9, and the film 4 passing through the gate section 9 is intermittently fed to a screen 21 by a projection lens 13.
projected on top. The film thus fed passes through the recording and reproducing section 14, passes through the constant speed feeding section 15, and is sent to the feeding roller 18 along the film guide 17 via the sound sprocket 16.

A second sensor 19 for detecting the end of the film is arranged between the film guide 17 and the feed roller 18, and when the second sensor 19 detects the end of the film, the running of the film is stopped. The film sent by the feed roller 18 is further wound onto the take-up reel 3 via the film guide section 20.

In FIG. 1, reference numeral 22 denotes a power switch, which allows the projector 1 to be turned on and off. This projector has an operation panel 23 and operation buttons 24 and 25i on the side of the screen 21 (4).
It is possible to perform various functions associated with projection, such as forward transfer, reverse feed, switching of film feed speed, and recording and playback.

Further, as shown in FIG. 1, there is an arcuate winding guide member 26 + for facilitating winding of the leading end of the film.
27 are provided. This guide member 26°27 is the third
As shown in detail in FIG. 4, the shaft 26a,
It is supported on a shaft so as to be able to rotate around a center 27a, and the other end is in contact with one surface of the reel 3 via a friction member 26b (see FIG. 4) made of rubber or the like. The degree of this frictional engagement is such that, for example, when winding a film, the rotation of the take-up reel 3 rotates clockwise in FIG. When rewinding, it is designed to rotate counterclockwise and separate from the film, allowing the film to be taken out.

In Fig. 3, 20 is a film guide section;
Consisting of two guide members 20a and 20b, the guide member 20b can be rotated around a shaft 30, and when the end of the film 4 is detected by the second sensor 19, it is manually or automatically moved to a position on the dashed line. Then move the terminal end 4a of the film to a position where it can be easily removed. 42, 43
, 44 are guide rollers that guide the trailing end 4a of the film to the supply reel 2 during rewinding.

Next, the present invention configured as described above will be explained in detail.

When the film 4 is supplied from the supply reel 2 and the passage of the film is detected by the first sensor 5, the lube setter 10 is set and the film guide members 20a, 20b are set.
are connected to form the film guide section of the discharge port. In this state, when the film 4 passes through the gate section 9, its image is projected onto the screen 21 via the projection lens 13, and the recording and reproducing section 14, constant speed feed section 15, sound sprocket 16, and feed roller 18
, and reaches the take-up reel 3 via the guide section 20.

In this case, since the take-up reel 3 rotates clockwise in FIG. 3, the guide members 26 and 27 move from the positions indicated by the dashed lines to the reel surface and the friction portions 11J' and 26b around the shafts 26a and 27a. 1, the film 4 is wound onto the take-up reel 3, and the film 4 is wound onto the take-up reel 3, and the end of the film is moved to the position shown by the dotted line. is detected by the second sensor 19, the film stops running,
The film guide member 20)) is rotated to the position shown in dashed lines in FIG. 3 to take out the end of the film and guide it to the supply reel 2 via the guide rollers 42, 43, 44 to begin rewinding. At this time, the take-up reel 3 rotates in the counterclockwise direction, and the guide members 26 and 27 overcome the above-mentioned frictional engagement due to centrifugal force and separate from the circumferential surface of the wound film, making it easier to unwind the film. ing.

As explained above, according to the present invention, an arc-shaped film guide member is provided, one end of which is rotatably supported on the outside of the take-up reel, and the other end of which is frictionally engaged with one surface of the take-up reel. When the reel rotates in the winding direction,
The guide system is structured so that it rotates toward the center of the reel (7) and rotates toward the outer periphery of the reel when it rotates in the unwinding direction, so winding can be done easily and reliably. It is possible to wind it onto a take-up reel.

In addition, although two guide members were provided in the above-mentioned embodiment,
Of course, the number is not limited to this, and only one is sufficient.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention.
FIG. 2 is a schematic perspective view and layout configuration diagram of a projector in which the apparatus of the present invention is used, and FIGS. 3 and 4 are a partial plan view and a sectional view showing the configuration of the apparatus of the present invention, respectively. ■...Movie projector, 2...Supply reel, 3...Take-up reel, 3a...core for winding, 4...film, 5...[1 sensor, 10...loop setter , 13
... Projection lens, 14... Recording and playback section, 15...
Constant speed feed section, 19...Second sensor, 26, 27...
-Guide member, 26a...friction member. Patent applicant Yamawa Denki Co., Ltd. (1 other person) (8)

Claims (2)

[Claims] (1) In a film winding device that winds the film supplied from a supply reel onto a horizontally arranged take-up reel, one end is rotatably supported on the outside of the take-up reel, and the other end is the take-up reel. An arc-shaped film guide member is provided that frictionally engages with the inner surface of at least one flange of the reel, and when the take-up reel rotates in the winding direction, the guide member rotates toward the center of the take-up reel, A film winding device characterized in that the film winding device is configured to rotate toward the outer periphery of the reel when rotating in the rewinding direction. (2) The film winding device according to claim 1, wherein two guide members are provided and are arranged radially symmetrically to each other.