JP3368545B2 - Photo film jam prevention mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jam prevention mechanism for a photographic film, and more particularly to a jam prevention mechanism for a photographic film conveyed along a film conveying path having an opening.

[0002]

2. Description of the Related Art A film image input device has been proposed in which a film image of a developed photographic film is photographed by an image sensor and is output to a monitor TV to display the film image. As shown in FIG. 6, this film image input apparatus conveys the photographic film F fed from the film cartridge 1 along a film conveyance path 3 formed between the guide members 2 and 2. Then, the photographic film F is illuminated with the illumination light from the light source 5 through the infrared cut filter 6 in a state where a predetermined tension is applied by the transport rollers 4 and 4. The transparent image is
The photographic film F taken by the image sensor 8 by the taking lens 7 and then taken up is taken up by the take-up spool 9.

[0003]

However, in the conventional photo film transport system path, the leading edge A of the film is wound into the placement opening 2A of the transport roller 4 formed on the guide member 2 due to the curl of the photo film F. There are cases.
When the leading edge A of the film is rolled up, a jam of the photographic film F is generated in the film transport path 3 due to the force for further transporting the photographic film F, so that the photographic film F is bent and unusable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a jam prevention mechanism for a photographic film which prevents the leading edge of the film from being caught and prevents jamming of the photographic film.

[0005]

In order to achieve the above-mentioned object, the present invention provides a jam prevention mechanism for a photographic film which is conveyed along a film conveying path having an opening formed therein. The photo film is provided upstream of the opening of the photo film and is movable in the width direction of the film transport path. By advancing into the film transport path, the photo film is pressed in the width direction and the photo film is moved. Is provided in a downstream side with respect to the opening of the film transport path, and a transport member is provided to transport the pressure member in the width direction of the film transport path. Detecting means for detecting the leading edge of the photographic film, and when the detecting means detects the leading edge of the photographic film, controls the driving means to retract the pressing member from the film transport path. It is characterized in that it consists of a control means.

Further, in order to achieve the above object, the present invention provides a film having a gap in a direction orthogonal to the photographic film surface.
A photographic film having a photographic film conveying path, a roller for conveying a photographic film provided in an opening formed at a predetermined position of the film conveying path, and a photographic film conveyed along the film conveying path by a rotational driving force of the roller. In the jam prevention mechanism, the roller has a conveying surface orthogonal to the photographic film surface in the gap of the film conveying path.
When the photo film in a position which is eccentrically distributed from a central position in a direction conveyed in a state of away from the opening, for detecting the leading edge of the photographic film by the detection means provided on the downstream side of the opening, the photographic film Away from the opening
It is characterized in that it is moved to the position where it was released .

[0007]

According to the present invention, the leading end of the film is conveyed in a state of being curved in the width direction by being pressed in the width direction by the pressing member that has advanced into the film conveying path. As a result, the leading edge of the film passes over the opening of the film transport path without being caught in the opening, so that it is possible to prevent jamming of the photographic film due to the winding. When the leading edge of the film passes through the opening and is detected by the detection means, the control means controls the drive means to retract the pressing member from the film transport path. As a result, the photographic film is conveyed in a normal shape with the curved state released.

According to the invention, the film tip is
The transport surface is transported in a state of being separated from the opening by rollers which are unevenly distributed from the central position of the film transport path. As a result, the leading edge of the film passes over the opening of the film transport path without being caught in the opening, so that it is possible to prevent jamming of the photographic film due to the winding. When the leading edge of the film passes through the opening and is detected by the detecting means, the roller is retracted to the original position of the opening. As a result, the photographic film is released from the opening, and is conveyed along the film conveyance path.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a web jam prevention mechanism according to the present invention will be described in detail below with reference to the accompanying drawings. 1 is a structural view of a photographic film jam prevention mechanism according to a first embodiment of the present invention applied to a photographic film image input device, and FIG. 2 is a top view of FIG.

A film cartridge 12 is provided in the main body 10 of the photographic film image input device shown by the chain double-dashed line in the figure.
Is installed. In the film cartridge 12,
The developed still photo film F is wound around the spool 14 in advance, and the photo film F is conveyed by the film driving mechanism along the film conveying path 18 formed between the guide members 16, 16.

As shown in FIG. 2, the film drive mechanism has a film supply motor 24, a film winding motor 26, and a film transport motor 28. These motors 24, 26, 28 are It is driven by the output from the motor driver 22 controlled by the CPU 20. The film supply motor 24 includes a gear 30,
The spool 14 of the film cartridge 12 through 32
The photographic film F can be sent out from the film cartridge 12 or rewound into the film cartridge 12 by engaging with and rotating the spool 14 in the forward / reverse direction.

The film winding motor 26 includes a gear 3
Take-up spool 4 of film take-up chamber 38 via
It is possible to wind up the photographic film F which is engaged with 0 and sent out by the film supplying motor 24. The film transport motor 28 includes a rotating shaft 4 of capstans 44, 44 arranged in the opening 42 of the guide member 16.
6 through the gears 48, 50 to engage the capstan 4
By rotating 4, 44, the both ends of the photographic film F are capstan 44, 44 and the pinch roller 5 shown in FIG.
It can be sandwiched between 2, 52 and conveyed at a constant speed.

Also, the film supply motor 24 is
The spool 14 of the film cartridge 12 is driven in the clockwise direction in FIG.
Film cartridge 12 until wound up by
I am trying to send out the photo film F from. Furthermore,
The film supply motor 24 is provided with a clutch mechanism for controlling the rotation of the spool 14, and the action of the clutch mechanism and the driving force of the capstans 44, 44 causes the photographic film F to be conveyed with a predetermined tension. .

On the other hand, a pressing plate 54, which is a pressing member of the photographic film F, and a sensor 56 for detecting the leading edge A of the film,
It is arranged on the upstream side and the downstream side with the capstan placement opening 42 interposed therebetween. As shown in FIGS. 2 and 3, the pressing plate 54 has a tip end portion 54A disposed in a groove portion 58 formed orthogonal to the film transport path 18. Further, a rack 54B is formed on the side surface of the pressing plate 54, and the rack 5B
4B is meshed with the pinion gear 62 of the motor 60. Therefore, the pressing plate 54 reciprocates along the groove 58 when the pinion gear 62 rotates normally / reversely, so that the front end portion 54A moves back and forth with respect to the film transport path 18.

The motor 60 is driven and controlled by the output from the motor driver 22 controlled by the CPU 20. That is, the film image input device main body 1
When the optical sensor, the micro switch, or the like detects that the film cartridge 12 is attached to 0, the detection signal is output to the CPU 20, and the drive signal is output from the CPU 20 to the motor driver 22. As a result, the motor 60 causes the pinion gear 62 to rotate forward by a predetermined amount by the output from the motor driver 22, and advances the tip end portion 54A of the pressing plate 54 into the film transport path 18 (see FIGS. 2 and 3). Further, when the sensor 56 detects the leading edge A of the film, the detection signal is output to the CPU 20, and the drive signal is output from the CPU 20 to the motor driver 22. As a result, the motor 60 reverses the pinion gear 62 by a predetermined amount by the output from the motor driver 22, and the tip 54A of the pressing plate 54 is moved to the film transport path 1.
Evacuate from 8.

As shown in FIG. 1, shooting windows 64, 64 are opened downstream of the sensor 56 of the guide members 16, 16. A CCD line sensor 66 is installed on the upper side of the photographing window 64, and a fluorescent lamp 68 is installed on the lower side. The CCD line sensor 66 is arranged in a direction orthogonal to the conveying direction of the photographic film F, and a fluorescent lamp 68
The transmission image of the frame image P of the photographic film F illuminated from the image is read from the photographing window 64 through the photographing lens 70.
The electric signal converted by the photoelectric conversion element of the CCD line sensor 66 is subjected to image processing by the image processing device 72, and then output to the monitor TV 74 as a video signal. As a result, the frame image is displayed on the monitor TV 74.

Next, the operation of the jam prevention mechanism of the photographic film constructed as described above will be described. First, the film cartridge 12 is attached to the film image input device main body 10.
The motor 60 rotates the pinion gear 62 forward by a predetermined amount by the output from the motor driver 22, so that the front end portion 54A of the pressing plate 54 advances into the film transport path 18.

Next, when the photo film F is started to be conveyed along the film conveying path 18 by the film driving mechanism,
When the film leading edge A passes through a region where the conveying path is narrowed due to the advancing of the pressing plate 54, the film leading edge A is sandwiched between the leading end portion 54A of the pressing plate 54 and the edge portion 16A of the guide member 16 and curved in the width direction. To do. Then, the film front end A passes over the capstan 44 and the capstan placement opening 42 in a curved state.

As a result, in this embodiment, the leading edge A of the film passes over the opening 42 without being caught in the opening 42, so that the jamming of the photographic film F caused by the winding can be prevented. Further, when the front end A of the film passes through the opening 42 and is detected by the sensor 56, the motor 60 reverses the pinion gear 62 by a predetermined amount by the output from the motor driver 22, so that the front end 5 of the pressing plate 54 is rotated.
4A retreats from the film transport path 18. This allows
Since the photographic film F is conveyed in a normal shape after the curved state is released, it does not adversely affect the frame image taken by the CCD line sensor 66 and the film winding by the take-up spool 40.

FIG. 4 and FIG. 5 are structural views of the essential part showing the jam prevention mechanism of the photographic film according to the second embodiment of the present invention, which is the same as or similar to the first embodiment shown in FIGS. The same reference numerals are given to the members, and the description thereof will be omitted.
The jam prevention mechanism of this embodiment is provided with a not-shown lifting device that vertically moves the capstan 44 and the pinch roller 52 integrally. The lifting device is composed of a known lifting mechanism using a cylinder, a cam, a motor, a rack-pinion gear, and the like.

When the film cartridge is attached to the film image input device, the elevating device is provided with a capstan 4
4 and the pinch roller 52 are moved upward as shown in FIG. 4, and the transport surface 44A of the capstan 44 is moved to the guide member.
The gap of the film transport path 18 formed between 16 and 16
Is moved from the central position 18A in the direction orthogonal to the plane of the photographic film F to a position eccentrically located. As a result, the leading edge A of the film is conveyed in a state of being lifted from the opening 42 by the capstan 44 raised from the opening 42, so that it is possible to prevent the occurrence of jamming of the photographic film due to the winding.

Further, in the lifting device, when the leading edge A of the film passes through the opening 42 and is detected by the sensor 56,
As shown in FIG. 5, the capstan 44 and the pinch roller 52 are moved downward and returned to their original positions. As a result, the photographic film F is released from the lifted state and is conveyed along the film conveying path 18, so that the CCD line sensor 66 is used to take a frame image and the winding spool 40 is adversely affected. Do not give.

In the second embodiment, an example in which the photographic film F is conveyed in the horizontal direction has been described. However, when the photographic film F is conveyed in the vertical direction, the capstan 4 is used.
4 and the pinch roller 52 may be moved horizontally.
Further, in the first and second embodiments, when the film cartridge is mounted on the film image input device, the pressing plate 54 and the capstan 44 are advanced to the film transport path 18, but the invention is not limited to this. . For example, an optical sensor or the like for detecting that the film front end A has been sent out from the film cartridge 12 may be provided at the entrance of the conveying path 18 and may advance when the film front end A is detected by this optical sensor. The film supply motor 24 may be advanced when it is started.

Further, in the present embodiment, the example applied to the film image input device has been described, but the present invention is not limited to this, and it is applied as long as an opening is formed on the film conveying path. be able to.

[0025]

As described above, according to the jam prevention mechanism for a photographic film according to the present invention, the leading end of the film is conveyed while being curved in the width direction by the pressing member, and the leading end of the film is located at the opening of the film conveying path. Since it is prevented from being caught, it is possible to prevent the occurrence of jam of the photographic film.

Further, according to the present invention, the carrying surface is in the direction of the gap of the film carrying path, the direction being orthogonal to the photographic film surface.
Since the photo film transport rollers unevenly distributed from the center position transport the photo film tip away from the opening to prevent the photo film edge from getting caught in the film transport path opening, the photo film jam is prevented. it can.

[Brief description of drawings]

FIG. 1 is a structural diagram in which a jam prevention mechanism of a photographic film according to a first embodiment of the present invention is applied to a film image input device.

FIG. 2 is a top view of FIG.

FIG. 3 is a perspective view of an essential part of a jam prevention mechanism for a photographic film according to the first embodiment of the present invention.

FIG. 4 is an explanatory view of a main part of a jam prevention mechanism for a photographic film according to a second embodiment of the present invention.

FIG. 5 is an explanatory view of a main part of a jam prevention mechanism for a photo film according to a second embodiment of the present invention.

FIG. 6 is an explanatory view of a conventional photographic film transport system path applied to a film image input device.

[Explanation of symbols]

10 ... Film image input device main body 12 ... Film cartridge 16 ... Guide member 18 ... Film transport path 20 ... CPU 22 ... Motor driver 42 ... Opening 44 ... Capstan 54 ... Pressing plate 56 ... Sensor 60 ... Motor F ... Photo film

Claims (2)

(57) [Claims] 1. A jam prevention mechanism for a photographic film conveyed along a film conveying path having an opening formed therein, the mechanism being provided upstream of the opening of the film conveying path and conveying the film. A pressing member that is movable forward and backward in the width direction of the path, presses the photographic film in the width direction by advancing into the film transfer path, and bends the photographic film in the width direction, and the pressing member transfers the film. Drive means for moving forward and backward in the width direction of the path, detection means provided on the downstream side of the opening of the film transfer path, for detecting the leading edge of the conveyed photographic film, and the detection means And a control means for controlling the driving means to retract the pressing member from the film transport path when the leading edge of the photographic film is detected. Arm of the jam prevention mechanism. 2. A gap is provided in a direction orthogonal to the photographic film surface.
A photo in which a photo film conveying path is provided, and a photo film conveying roller is provided in an opening formed at a predetermined position of the photo film conveying path, and the photo film is conveyed along the film conveying path by the rotational driving force of the roller. In the jam prevention mechanism of the film, the roller has a conveyance surface in the gap of the film conveyance path.
The photographic film is conveyed at a position eccentrically located from the central position in the direction orthogonal to the true film surface and separated from the opening, and the leading end of the photographic film is detected by the detection means provided on the downstream side of the opening. Then, the photo film
A jam prevention mechanism for a photographic film, wherein the jam prevention mechanism is moved to a position released from the opening .