JPH0943778A - Forming method for photographic film roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the method of easily forming a film roll at a low cost by using a photographic film cartridge for feeding a photographic film to the outside of a cartridge body with the rotation of a spool. SOLUTION: In the photographic film cartridge loaded in a film unit with a lens, the film is sucked and taken up on an air intake take-up shaft, to form the film roll, so that the top end of the film is never strongly curled. Even if the above-mentioned method is applied to the photographic film cartridge adopting the system of feeding the film to the outside of the cartridge body by the rotation of the spool, the feeding of the film is prevented from being disabled owing to the catching of the top end of the film in the film entrance of the cartridge body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a photographic film roll loaded in a film chamber of a lens-fitted film unit.

[0002]

2. Description of the Related Art In Japanese Unexamined Patent Publication (Kokai) No. 5-224351, even the tip of a photographic film is stored in the cartridge body in an unused state, and the tip of the photographic film is sent out of the cartridge body by rotating a spool. A photographic film cartridge having a function is disclosed.

This photographic film cartridge is composed of two light-shielding case parts that are fitted to each other, and has a photographic film main body having a photographic film passage for taking in and out the photographic film, and is rotatably attached to the main body of the photographic film. The film is composed of a spool that holds the rear end of the film, a light-shielding member that covers the photographic film passage in a light-tight manner to keep the inside of the film cartridge in a light-shielding state, and an unexposed photographic film.

By the way, when a film unit with a lens is constructed by using the photographic film cartridge as described above, the photographic film is pulled out from the photographic film cartridge beforehand to form a film roll, and this film roll is formed. It is necessary to load the roll and the cartridge body into the film chamber and the cartridge chamber formed in the lens-fitted film unit, respectively.

Therefore, for example, Japanese Patent Laid-Open No. 6-332118
In the publication, after sending out the photo film from the photo film cartridge to some extent, the tip of the photo film is sandwiched between the forks of the film winding station,
There is described a film loading device for a lens-fitted film unit that forms a film roll by rotating this fork and winding up a photographic film.

[0006]

However, when a film roll is formed using the above-mentioned apparatus,
The photo film is sent out from the photo film patrone to some extent, then the leading edge of the photo film is sandwiched between the forks of the film winding station, and the fork is rotated to wind the photo film. However, there is a problem in that manufacturing equipment is expensive.

On the other hand, in a photo film cartridge in which the spool is rotated to feed the photo film, the photo film after development is completely wound up on the main body of the photo film and returned to the user, and the spool is reprinted if necessary. A method has been proposed in which the photographic film is rotated to be repeatedly fed out of the cartridge body. However, when using the above-mentioned photographic film cartridge by such a method, if the tip of the photographic film is sandwiched by a fork-shaped object and rolled up, the photographic film has a strong curl, so the spool is rotated to rotate. When applied to a photo film patrone that is sent out from the cartridge body, there is a possibility that the tip of the photo film will be caught in the film door of the patrone body and the film cannot be delivered.

On the other hand, a method may be considered in which the photographic film is directly wound around a cylindrical take-up shaft without sandwiching the leading end of the photographic film, but the diameter of the take-up shaft is small due to the rigidity of the photographic film, and the photographic film is Since there is no close contact with the take-up shaft, there is a problem that the take-up shaft runs idle and cannot be taken up.

The present invention has been made to solve such a problem, and is a method for forming a film roll easily and at low cost by using a photographic film cartridge which rotates a spool and sends the photographic film out of the main body of the cartridge. I will provide a.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a film roll provided with a take-up shaft for rotating a spool to feed a photographic film from a main body of a cartridge, and rotating the photographic film. The leading edge of the photographic film fed into the film roll forming chamber is generated by feeding the film into the film forming chamber and inhaling air from an air intake hole formed in the outer peripheral wall of the winding shaft to generate an air flow toward the winding shaft in the film roll forming chamber. Is captured by the outer peripheral wall of the take-up shaft by suction and then the photographic film is wound around the take-up shaft.

According to a second aspect of the present invention, an inlet is formed at one end for receiving the photographic film delivered from the cartridge body, and the other end is provided with a film guide passage communicating with the film roll forming chamber. The wall surface is provided with an inflow port through which the air flow toward the film roll forming chamber flows. Further, in claim 3, after forming a photographic film roll on the take-up shaft, by feeding gas from the intake hole, a gap is formed between the inner circumference of the film roll and the outer circumferential wall of the take-up shaft. It is something that is made to occur.

[0012]

FIG. 2 is an exploded perspective view of a lens-fitted film unit in which a photographic film roll formed by the forming method of the present invention is loaded. The lens-fitted film unit 2 is composed of a photographing unit 3, a main body portion 4, and a front cover 5 and a rear cover 6 which are claw-fastened to the front and rear by the photographing unit 3. The photographing unit 3 includes a shutter device 11, a photographing lens 12, a finder 13, a photographing number display plate 14, and the like, and is attached to the front surface of the main body unit 4.

A body chamber 4 is formed with a patrone chamber 8 and a film chamber 9 on the left and right with a central aperture 7 interposed therebetween. Further, a hoisting knob 1 is provided above the patrone chamber 8.
5 is attached. Further, the above-mentioned photographing unit 3 is attached to the front surface of the aperture 7. The front cover 5 is provided with holes for exposing the taking lens 12, the viewfinder 13, the number-of-shots display plate 14, and the like.
Also, a release button 16 is integrally provided. The rear cover 6 is integrally provided with a bottom cover 6a for the film chamber and a bottom cover 6b for the film chamber so as to cover the bottom of the film chamber 8 and the bottom of the film chamber 9 in a light-tight manner. There is.

The photographic film cartridge 20 loaded in the main body portion 4 of the lens-fitted film unit 2 as described above.
Is composed of a cartridge main body 21 and a photographic film 22. A spool 23 is rotatably attached to the inside of the cartridge main body 21 and a photographic film 22 is wound around the spool 23. Then, by rotating the spool 23, the photo film 22 is fed from the film entrance / exit 24. The photo film 22 is provided with two perforations 25 for each frame.

The photographic film 22 is rolled into a film roll 22a when it is stored in the main body 4 of the lens-fitted film unit 2. Then, the cartridge main body 21 is placed in the patrone chamber 8 and the film roll 2
The films 2a are stored in the film chamber 9, respectively.

FIG. 3 is an external perspective view showing a film roll forming machine for forming a film roll when the photographic film cartridge is loaded by the method of the present invention.
FIG. 4 is a sectional view of FIG. The film roll forming machine 30 is roughly divided into a cartridge holding section 31, a film roll forming section 32, and a film winding section 33. The cartridge holder 21 includes the cartridge body 21.
A set portion 31a which is curved and recessed so as to follow the outer shape of the photo film cartridge 20 is provided on the set portion 31a so that the film entrance / exit 24 of the photographic film cartridge 20 becomes horizontal.

On the side of the cartridge holder 31,
A spool rotating fork 40 connected to a motor (not shown) is provided, and after the photo film cartridge 20 is placed on the setting unit 31a, the spool 23 is fitted into the spool 23 to rotate the spool 23, and the inside of the cartridge body 21 is rotated. The photographic film 22 that was caught in is taken out.

The film roll forming section 32 has an inlet 34 into which the photographic film 22 is inserted, a cylindrical roll forming chamber 35 having a diameter slightly smaller than the inner diameter of the film chamber 9 of the lens-fitted film unit 2, and this roll. The photographic film 22 is connected to the forming chamber 35 and the inlet 34, and the photographic film 22 is connected to the roll forming chamber 3
5 and a film guide passage 36 to be introduced into the film 5 are formed.

These inlet 34, roll forming chamber 35,
Also, one side surface of the film guide passage 36 is open for taking out the formed film roll 22a.
Further, a side shutter 39 for covering these open side faces is provided so as to be openable and closable when the film roll is formed.

As shown in FIG. 4, a large number of inflow holes 37 are formed in the roll forming chamber 35 and the film guide passage 36.
Is provided. These inflow holes 37 are oblique to the roll forming chamber 35 and the film guide passage 36 so that compressed air, which is the gas to be injected, is injected in the moving direction of the photographic film 22 inserted into the roll forming chamber 35. Has been formed. As a result, when compressed air is injected in the roll forming chamber 35, a vortex flow of gas is generated in the counterclockwise direction, and in the film guide passage 36, a gas flow is generated in the direction of the roll forming chamber 35.

Further, pressure-resistant pipes 38a, 38b for feeding compressed air to be ejected from the large number of inflow holes 37 are provided above and below the film roll forming portion 32. The pressure resistant pipes 38a and 38b are connected to a compressor (not shown) that supplies compressed air.

A winding shaft 41 for winding the photographic film 22 into the film roll forming unit 32 is provided on the side of the film roll forming unit 32 opposite to the side shutter 39, and a winding shaft 41 for rotating the winding shaft 41. A film winding section 33 including a motor 49 is provided. The winding shaft 41 is provided with a large number of intake holes 42, and a pressure resistant pipe 41a connected to a vacuum pump (not shown) for exhausting air.
Are connected.

Further, the winding shaft 41 is provided with a gear 43, and a gear 44 fixed to a rotating shaft 49a of a motor 49.
Is engaged. Then, the film winding portion 33
The whole is moved by a parallel moving device (not shown) between a winding position where the winding shaft 41 penetrates into the film roll forming portion 32 and a retracted position where the winding shaft 41 comes out of the film roll forming portion 32. It is configured to be possible.

As a result, when the film roll 22a is formed, the take-up shaft 41 moves to the take-up position where it penetrates into the film roll forming portion 32, and air is taken in through the many intake holes 42, so that the photographic film 22 is sucked. The tip end is attracted to the winding shaft 41. Then, when the motor 49 rotates,
The take-up shaft 41 rotates while taking in air, and the photographic film 22 is wound around the take-up shaft 41.
a is formed.

Next, the forming method of the present invention using such an apparatus and its operation will be described with reference to the flow chart of FIG. First, the photographic film cartridge 20 to be loaded into the lens-fitted film unit 2 is placed on the setting portion 31a provided in the cartridge holding portion 31 of the film roll forming machine 30 so that the film entrance / exit 24 is horizontal. Further, the entire film winding unit 33 is moved to the winding position, and the winding shaft 41 is inserted into the film roll forming unit 32.

Next, a compressor (not shown) for supplying compressed air is started, and the compressed air is sent to the film roll forming machine 30 through the pressure resistant pipes 38a and 38b. When the compressor is activated, compressed air is injected into the roll forming chamber 35 and the film guide passage 36 from the large number of inflow holes 37. As described above, this inflow hole 37
Is formed obliquely with respect to the roll forming chamber 35 and the film guide passage 36, so that in the roll forming chamber 35,
A gas swirl is generated in the counterclockwise direction, which is the winding direction of the film roll 22a to be formed, and a gas flow is generated in the film guide passage 36 toward the roll forming chamber 35.

Further, a vacuum pump (not shown) is activated to suck air from the suction hole 42 provided in the winding shaft 41 through the pressure resistant pipe 41a. At the same time, the motor 49 is activated to rotate the winding shaft 41 counterclockwise.

Next, the spool rotary fork 40 is fitted onto the spool 23 from the side of the photo film cartridge 20, and the motor is rotated. When the spool 23 rotates,
The photographic film 22 that has been wound inside the cartridge body 21 is sequentially fed out from the film entrance / exit 24 and enters the film roll forming unit 32 from the inlet 34 of the film roll forming machine 30.

The photographic film 22 entered through the inlet 34
Is compressed air injected from the upper and lower inflow holes 37,
The film enters the inside of the film guide passage 36 in the direction of the roll forming chamber 35 very smoothly with almost no frictional force. The leading edge of the photographic film 22 is the roll forming chamber 3
When it reaches the inside of 5, it is adsorbed to the winding shaft 41 that is being sucked from the suction hole 42 this time.

When the leading end of the photographic film 22 is adsorbed by the take-up shaft 41, the photographic film 22 is swiftly wound around the take-up shaft 41 by the rotation of the take-up shaft 41 to form a film roll 22a. Also, photo film 22
The back surface of the, by the compressed air injected from the inflow hole 37,
The photographic film 22 is wound up very smoothly without rubbing the inner wall of the roll forming chamber 35 to form the film roll 22a. During film roll formation,
In order to prevent the inserted photo film 22 from meandering, prevent turbulent flow of compressed air to be jetted, and enhance the intake effect of the winding shaft 41, the side shutter 39 is closed to the top, the roll forming chamber 35, and the film guide passage 36. The open side of the is covered.

In the process of forming the film roll 22a as described above, the leading edge of the photographic film 22 is not pinched by a fork or the like and is not wound. The inner diameter is always kept above a certain level. As a result, when the photographic film 22 is again fed from the photographic film cartridge 20, the photographic film 22 is smoothly fed without the leading edge of the photographic film 22 being caught in the film entrance / exit 24.

In this way, when the film roll 22a is formed with the inner diameter kept above a certain level and no tight curl or crease is formed, the motor 49 is stopped, the rotation of the take-up shaft 41 is stopped, and the vacuum pump is stopped. (Not shown) also stops and the intake from the intake hole 42 stops. Then, this time, air is sent backward from the vacuum pump through the pressure resistant pipe 41a, and air is reversely injected from the intake hole 42.
As a result, a certain gap is formed between the formed film roll 22a and the winding shaft 41. The winding shaft 41 may be slightly reversely rotated as a means for forming the gap.

Then, the entire film winding section 33 is moved to the retracted position. As a result, the winding shaft 41 is removed from the film roll 22a. At this time, as described above, air is back-injected from the intake hole 42, and a constant gap is formed between the formed film roll 22a and the winding shaft 41, so that the photographic film 22 is not damaged. The winding shaft 41 can be pulled out from the film roll 22a extremely smoothly.

Then, the side shutter 39 is lowered, and the side faces of the roll forming chamber 35 and the film guide passage 36 are opened. Then, the film roll 22 a is clamped by a clip (not shown) and is pulled out from the film roll forming machine 30 together with the cartridge body 21. Then, the cartridge main body is placed in the cartridge chamber of the lens-fitted film unit (not shown), and the film roll 22
Each a is stored in the film chamber. Then, the bottom cover of the film chamber and the bottom cover 6b of the film chamber are each closed, and the loading of the photographic film cartridge in the lens-fitted film unit by the method of the present invention is completed.

As described above, in the process of forming the film roll, air is taken in from the winding shaft and the leading edge of the photographic film is adsorbed and wound up, so that it is not necessary to pinch the leading edge of the photographic film with a fork or the like. For this reason, the tip of the photo film does not have a strong curl, and even if it is applied to a photo film patrone that rotates the spool and sends the photo film out of the patrone body, the tip of the photo film is not attached to the film door of the patrone body. No more getting caught and unable to send.

In the above embodiment, the compressor is forcibly pressure-fed so that the gas is ejected from the inlet, but the intake from the intake hole of the take-up shaft naturally causes the gas from the inlet. The gas may be ejected by the inflow.

[0037]

As described above, according to the method for forming a photographic film roll of the present invention, the spool is rotated to feed the photographic film out of the cartridge body, and the photographic film is provided with a rotatable take-up shaft. The film is fed into the film roll forming chamber, and an air flow toward the winding shaft is generated in the film roll forming chamber by sucking air from an intake hole formed in the outer peripheral wall of the winding shaft, and is fed into the film roll forming chamber. Since the tip of the photo film was captured by the outer peripheral wall of the take-up shaft by suction, the photo film was wound around the take-up shaft, so a photo film patrone that rotates the spool and sends the photo film out of the cartridge is used. Thus, the film roll can be easily formed at low cost.

[Brief description of drawings]

FIG. 1 is a flowchart showing a procedure of a forming method of the present invention.

FIG. 2 is an exploded perspective view of a lens-fitted film unit used in the forming method of the present invention.

FIG. 3 is an external perspective view showing a film roll forming machine used in the forming method of the present invention.

4 is a cross-sectional view of FIG.

[Explanation of symbols]

 2 Film unit with lens 8 Patrone chamber 9 Film chamber 20 Photo film Patrone 21 Patrone body 22 Photo film 22a Film roll 30 Film roll forming machine 31a Set part 35 Roll forming chamber 37 Inlet hole 41 Winding shaft 42 Intake hole

Claims (3)

[Claims] 1. A photographic film unit for forming a lens-fitted film unit using a photographic film unit using a photographic film cartridge, which sends a photographic film wound on the spool to the outside of the cartridge unit by rotating a spool in the cartridge unit. In the method of forming a photo film roll, which is performed prior to incorporating the photo film main body and the photo film rolled out from the photo film main body into the photo film chamber and the photo film chamber, respectively, in the method of forming the photo film roll, the photo is taken from the photo film cartridge by rotating the spool. The film is sent out, this photo film is sent into a film roll forming chamber provided with a rotatable take-up shaft, and the film is taken into the film roll forming chamber by sucking air from an intake hole formed in the outer peripheral wall of the take-up shaft. Generates an air flow toward the axis, Method of forming a photographic film roll, characterized in that the tip of the fed the photographic film in Muroru forming chamber was so wound after captured in the outer peripheral wall of the winding shaft by adsorption photographic film in the take-up shaft. 2. A film guide passage is formed at one end for receiving a photographic film sent out from the cartridge body, and the other end uses a film guide passage communicating with the film roll forming chamber, and on a wall surface forming the film guide passage. 2. The method of forming a photographic film roll according to claim 1, wherein the film roll forming chamber is provided with an inflow port into which the air flow flows. 3. A photographic film roll is formed on the take-up shaft, and then a gas is sent from the intake hole to form a gap between the inner circumference of the film roll and the outer circumferential wall of the take-up shaft. The method for forming a photographic film roll according to claim 1 or 2, wherein.