JPH07219030A - Film carrying device - Google Patents

Abstract

PURPOSE:To provide a film carrying device capable of taking up a film to a take-up reel even through a photographic film does not have perforations for taking-up. CONSTITUTION:The leading edge of the photographic film F guided to a film take-up chamber 20 is brought into close contact with the surface of the take-up reel 22 owing to curling tendency, and is taken up to the rotated and driven reel 22 by the frictional resistance to the reel 22. If the diameter D of the reel 22 is made to be equal to or above the maximum take-up diameter (d) of the photographic film F, the photographic film F is surely brought into close contact with the reel 22 because curl curvature of the curling tendency on the leading edge of the photographic film F is smaller than the diameter (d) of the take-up reel. Thus, sufficient frictional resistance can be obtained so as to take up the photographic film F.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film transfer device, and more particularly to a film transfer device applied to a camera or a film image input device.

[0002]

2. Description of the Related Art Conventionally, a film transporting device of this type has a mechanism for feeding a photographic film wound around a spool of a cartridge or a film cartridge, a take-up reel, and a claw portion formed on the take-up reel. The main structure is a mechanism for engaging the take-up perforation of the fed photographic film and winding the photographic film on a take-up reel.

[0003]

By the way, as a recent photographic film, a type having no take-up perforation has been proposed. However, the conventional film transport device has a drawback that it cannot take up a photographic film having no take-up perforation because it takes up the take-up perforation by engaging the claw portion of the take-up spool.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a film transporting device capable of winding a photographic film having no winding perforation.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention delivers a long photographic film wound on a spool by a film delivery mechanism, and wraps the delivered photographic film. In a film transport device that winds on a take-up reel that is rotationally driven by a take-up mechanism, the diameter of the take-up reel is formed to be equal to or larger than the maximum take-up diameter of the photographic film wound on the spool,
The photographic film is wound up by the frictional resistance with the winding reel.

[0006]

According to the present invention, a photographic film having no take-up perforation is fed from a spool by a film feeding mechanism, and the fed photographic film is rubbed with a take-up reel which is rotationally driven by the film winding mechanism. Wind up with resistance.

Here, when the diameter of the take-up reel is made smaller than the maximum take-up diameter of the photo film wound on the spool, the curl curvature of the leading end portion of the photo film sent out from the spool is larger than that of the take-up reel. Since it is larger than the diameter, the photographic film does not firmly adhere to the take-up reel. As a result, the frictional resistance between the photographic film and the take-up reel cannot be sufficiently obtained, so that the photographic film cannot be taken up.

On the other hand, when the diameter of the take-up reel is set to be equal to or larger than the maximum take-up diameter of the photographic film wound on the spool, the curl curvature of the leading end portion of the photographic film is larger than the diameter of the take-up reel. Because it is small, the photographic film firmly adheres to the take-up reel. As a result, the above-mentioned frictional resistance is sufficiently obtained, so that the photographic film can be wound up.

Therefore, according to the present invention, the diameter of the take-up reel is formed to be equal to or larger than the maximum take-up diameter of the photographic film wound on the spool so that the photographic film having no take-up perforation can be used as a take-up reel. Can be wound up by friction resistance. Further, if the film take-up speed by the film take-up mechanism is set to 1.2 times or more the film take-out speed by the film take-out mechanism, the photographic film can be taken up on the take-up reel smoothly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a film transporting apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a structural diagram showing an embodiment of a film image input device to which a film transport device according to the present invention is applied.

A film cartridge 12 is mounted in the main body 10 of the film image input apparatus shown by the chain double-dashed line in the figure. A developed photographic film F is pre-wound on the spool 14 in the film cartridge 12, and the photographic film F is rewound from the film cartridge 12 by a film driving mechanism. The photographic film F used in this embodiment is not a general photographic film provided with a perforation for winding, but only the perforation 16 for detecting the position of the frame P as shown in FIG. It is a set photo film. Also, Perforation 1 of Photo Film F
A magnetic recording layer 18 is formed for each frame P between 6 and 16. Further, the photographic film F is not a conventional one whose base is made of polyethylene terephthalate, but is obtained by heat treating polyethylene naphthalate at a temperature of 50 ° C. to a glass transition temperature (Tg) or lower for 0.1 to 1500 hours. , It is stronger and more durable than the conventional base.

As shown in FIG. 1, the film driving mechanism engages with the spool 14 of the film cartridge 12 and rotates the spool 14 in the normal / reverse direction, and a film take-up reel 22 in the film take-up chamber 20. And a photo film F, which is disposed on the transport path of the film F and is capped by the capstans 24, 24 and the pinch rollers 26, 26. And a film transport section for transporting at a constant speed.

The film supply unit drives the spool 14 of the film cartridge 12 in the clockwise direction in the figure, and the film cartridge 12 is driven until the leading end of the photographic film is taken up by the take-up reel 22 of the film take-up unit. I am sending out the photo film F. Further, the film supply section is provided with a clutch mechanism for controlling the rotation of the spool 14, and the photographic film F is conveyed with a predetermined tension by the action of the clutch mechanism and the driving force of the capstans 24, 24. It

The photographic film F sent from the capstan 24 is introduced into the film winding chamber 20 via a magnetic head device 28. The magnetic head device 28
Is provided with a magnetic head 30 above the photo film F and a pad 32 below. The pad 32 is biased toward the magnetic head 30 by the biasing force of the spring 34. As a result, the magnetic recording layer 18 of the photographic film F passing through the magnetic head device 28 (see FIG. 2).
Is read by being pressed against the magnetic head 30 by the pad 32. The magnetic data of the magnetic recording layer 18 read by the magnetic head 30 is reproduced by the magnetic recording / reproducing device 36 and displayed on the monitor TV 38.

The photographic film F guided to the film winding chamber 20 is wound on a winding reel 22 which is driven to rotate clockwise in the drawing by frictional resistance with the winding reel 22. The diameter D of the take-up reel 22 is larger than the maximum take-up diameter d of the photographic film F wound around the spool 14. The photographic film F wound on the take-up reel 22 is pressed against the take-up reel 22 by the rollers 42, 42 urged by the leaf springs 40, 40.

On the other hand, a CCD line sensor 44 is installed below the capstans 22, 22. The CCD line sensor 44 is arranged in a direction orthogonal to the conveying direction of the photographic film F, and reads the transmission image of the frame P of the photographic film F illuminated by the light source 46 through the taking lens 48. The electric signal converted by the photoelectric conversion element of the CCD line sensor 44 is subjected to image processing by the image processing device 50 and then output as a video signal on the monitor TV 38. As a result, the frame image and the magnetic data of the magnetic recording layer 18 are displayed on the monitor TV 38.

Next, the operation of the film transporting device constructed as described above will be described. The leading end of the photographic film F guided to the film winding chamber 20 adheres to the surface of the winding reel 22 due to its winding tendency, and the winding reel 22 is driven to rotate clockwise in the drawing. It is wound up due to the frictional resistance with the take-up reel 22. Here, when the diameter D of the take-up reel 22 is made smaller than the maximum take-up diameter d of the photo film F wound on the spool 14, the curl curvature of the leading end portion of the photo film F becomes the diameter of the take-up reel 22. D
Therefore, the photographic film F is not firmly attached to the take-up reel 22. As a result, sufficient frictional resistance between the photographic film F and the take-up reel 22 cannot be obtained, and the photographic film F cannot be wound.

On the other hand, when the diameter D of the take-up reel 22 is equal to or larger than the maximum take-up diameter d of the photographic film F as in this embodiment, the curl curvature of the leading end portion of the photographic film F is taken up. Since the diameter is smaller than the diameter d of the reel, the photographic film F surely adheres to the take-up reel 22. As a result, the above-mentioned frictional resistance is sufficiently obtained, so that the photographic film F can be wound up.

Therefore, in this embodiment, the diameter of the take-up reel 22 is formed to be equal to or larger than the maximum take-up diameter d of the photo film F wound on the spool 14, so that even the photo film F having no take-up perforation is used. It can be wound by frictional resistance with the take-up reel 22. Further, when the film take-up speed taken up by the take-up reel 22 is conveyed at a speed less than 1.2 times the film take-out speed sent out from the film cartridge 12, there is a probability that a take-up reel 22 will fail to take up the film. Is high, but 1.
It has been found that the above-mentioned inconvenience disappears when the sheet is conveyed at a speed twice or more. As a result, in this embodiment, the film winding speed is set to 1.2 times or more the film feeding speed, so that the photographic film F can be smoothly wound around the winding reel 22.

The photographic film F used in this embodiment is
The base is not limited to heat-treated polyethylene naphthalate, but can be applied to a conventional photographic film in which the base is formed of polyethylene terephthalate. Further, although the film transporting device applied to the film image input device is described in the present embodiment, it may be applied to the camera.

[0021]

As described above, according to the film conveying apparatus of the present invention, the diameter of the take-up reel is formed to be larger than the maximum take-up diameter of the photographic film wound on the spool. Even a photo film without perforation can be taken up by frictional resistance with the take-up reel.

Further, since the film take-up speed by the film take-up mechanism is set to 1.2 times or more of the film take-out speed by the film take-out mechanism, the photographic film can be taken up on the take-up reel smoothly.

[Brief description of drawings]

FIG. 1 is a structural diagram showing an embodiment in which a film transport device according to the present invention is applied to a film image input device.

FIG. 2 is a plan view of a photographic film applied to a film transport device according to the present invention.

[Explanation of symbols]

 10 ... Film image input device main body 12 ... Film cartridge 14 ... Spool 20 ... Film winding chamber 22 ... Winding reel 28 ... Magnetic head device 36 ... Magnetic recording / reproducing device 38 ... Monitor TV 44 ... CCD line sensor 50 ... Image processing device F ... Photo film

Claims (2)

[Claims] 1. A film transport device for feeding a long photographic film wound on a spool by a film feeding mechanism and winding the fed photographic film on a take-up reel which is rotationally driven by a film take-up mechanism. In the above, the diameter of the take-up reel is formed to be equal to or larger than the maximum take-up diameter of the photo film wound on the spool, and the photo film is taken up by frictional resistance with the take-up reel. Film transport device. 2. The film transport apparatus according to claim 1, wherein the film winding speed of the film winding mechanism is set to 1.2 times or more the film feeding speed of the film feeding mechanism.