JPH10288828A - Photographic roll film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographic roll film capable of easily and surely locking a photographic film with a light shielding paper to a spool shaft. SOLUTION: A shaft member 10 is provided with a supporting surface for setting a light shielding paper 12, in the axial direction of the spool shaft 6. A chuck member 11 is turnably provided on the circumference of a shaft disposed to be perpendicular to the axial direction of the spool shaft 6 on one side of the shaft member 10 holding the supporting surface 12. Engaging clicks 20 and 22 engaged when the chuck member 11 is laid fallen on the supporting surface 12 are provided in the shaft member 10 and the chuck member 12, respectively. When the top end part 2a of the light shielding paper 2 is set on the supporting surface 12 and the chuck member 11 is laid fallen on the supporting surface 12, the top end part 2a is held between the supporting surface 12 and the bottom surface 11a of the chuck member 11 facing the supporting surface 12. At this point, the engaging clicks 20 and 22 are engaged to inhibit the turning of the chuck member 11, so that the top end part 2a is restrained between the supporting surface 12 and the chuck member 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic roll film in which a photographic film with light-shielding paper is engaged with a spool shaft and wound around the spool shaft in a roll.

[0002]

2. Description of the Related Art Roll films for photography use 120,22.
There are two types known as type 0. They are,
The photographic film is formed by locking a light-shielding paper with a light-shielding paper provided with a light-shielding paper at least at a leading end and a rear end of the belt-shaped photographic film on a spool shaft and winding the film in a roll shape.

[0003] In manufacturing a photographic roll film, the spool is rotated while inserting the rear end of the photographic film with light-shielding paper into a slit formed along the axial direction of the spool shaft, and the light-shielding paper is attached around the spool shaft. Wind the photo film in a roll. The light-shielding paper is wound around a spool shaft together with the photo film to shield the photo film.
Next, make sure that the photo film with shading paper does not loosen
Attach adhesive tape to the end of the light-shielding paper. Since the circular flanges provided at both ends of the spool shaft are formed with the width of the light-shielding paper, the edge of the roll-shaped photo film with the light-shielding paper is restricted in the width direction, and at the same time, external light from the width direction is prevented. Prevents intrusion.

When loading the photographic roll film into a medium format camera, first, the back cover is opened and a used spool is set in advance in a film winding chamber of the medium format camera. Next, after peeling off the adhesive tape, the new photo roll film is inserted into the film loading chamber so that the photo film with light-shielding paper is not loosened. Then, the chucking groove provided in the flange is engaged with the key shaft of the film loading chamber. Next, the spool shaft is rotated while inserting the leading end of the light-shielding paper into the slit of the spool on the film winding chamber side. The back cover is closed after the light-shielding paper is wound around the spool shaft several times to lock the photo film with the light-shielding paper on the spool shaft.

By the way, in the above-described apparatus, the film is continuously wound up after the photographing operation, so that the rear end of the photographic film with the light-shielding paper comes out of the slit. Therefore, when the leading end of the photo film with light-shielding paper is locked to the spool shaft, it is necessary to rotate the spool several times while pressing the light-shielding paper with a finger so that the light-shielding paper does not come out of the slit. Therefore, the work was troublesome and required getting used to. For this reason, various types of photographic roll films have been proposed in which a locking claw provided inside a slit is engaged with a locking hole provided in a light-shielding paper so that it is not necessary to press with a finger.

On the other hand, for example, in Japanese Utility Model Publication No. 41-12371, a locking projection formed by detaching a part of a spool shaft and detachably attached to the spool shaft is provided with a locking projection. Is mounted on a spool shaft through a hole provided at the end of the film to lock the photographic film. In U.S. Pat. No. 4,974,788, a film end and a lock member are simultaneously inserted into a slit provided in a spool shaft, and the film end is sandwiched between an inner peripheral wall of the slit and the lock member. An apparatus for locking a photographic film is disclosed.

[0007]

However, in the above-mentioned photographic roll film, there is a problem that when inserting the light-shielding paper into the slit, the edge of the light-shielding paper hits the locking claw, resulting in a poor insertion. .

Further, as disclosed in Japanese Utility Model Publication No. 41-12371, a locking projection is passed through a hole provided at the end of the film and attached to a spool shaft to lock the photographic film. The locking projection has to be passed through the hole at the end of the film, which is troublesome. Also, as disclosed in U.S. Pat. No. 4,974,788,
When the film end and the lock member are simultaneously inserted into the slit provided on the spool shaft, the misalignment is likely to occur when the film end and the lock member are simultaneously inserted into the slit. In addition, the locking member and the locking member may be separated and lost.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and provides a photographic roll film in which a photographic film with light-shielding paper can be easily and reliably locked to a spool shaft. It is intended to do so.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a spool member includes a shaft member provided with a light-shielding paper setting support surface along an axial direction of the spool shaft. A chuck member rotatably provided around a shaft disposed orthogonal to the axial direction of the spool shaft on one side of a shaft member sandwiching the support surface, and engaged by tilting the chuck member on the support surface. Engaging means for inhibiting the rotation of the chuck member which has fallen on the support surface, a light-shielding paper is set on the support surface, the chuck member is lowered on the support surface, and the support surface and the support surface face each other. The rotation of the chuck member is prohibited by the engagement means with the light-shielding paper sandwiched between the bottom surface of the chuck member and the light-shielding paper is locked between the support surface and the bottom surface of the chuck member. Things.

According to the second aspect of the invention, at least one of the support surface and the bottom surface of the chuck member is provided with a light-shielding paper locking projection. According to the third aspect of the present invention, at least one of the support surface and the bottom surface of the chuck member is provided with a light-blocking paper locking projection, and the other is provided with a hole into which the projection partially enters.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 5, which shows an example of a photo film with light-shielding paper used for a 120-type photo roll film, the light-shielding paper 2 is formed in a belt shape longer than the photo film 3. In FIG. The light-shielding paper 2 includes a photo film 3
One end of the photo film 3 is fixed with an adhesive tape 4 so as to cover the entire base surface. The front end portion 2a and the rear end portion 2b of the light-shielding paper 2 are formed in a trapezoidal shape by narrowing the edges of both sides in a tapered shape, and each is narrow. In addition,
The photographic film 3 and the adhesive tape 4 are represented by a one-dot chain line and a two-dot chain line, respectively.

As shown in FIG. 1, the photographic roll film is composed of a photographic film 3 with light-shielding paper 2 and a spool 5 formed of an integrally molded plastic product.
A pair of flanges 8 are formed at both ends of the spool shaft 6. Each flange 8 has a chucking groove 9 which is engaged with a key shaft provided in a film loading chamber or a film winding chamber of the camera.

A support surface 12 for two sets of light-shielding paper is formed on the shaft member 10 along the axial direction of the spool shaft 6, and the leading end 2 a and the rear end of the light-shielding paper 2 are formed on the support surface 12. 2
b is set stably.

A chuck member 11 is provided integrally with the shaft member 10. One end of the chuck member 11 is connected to one side of the shaft member 10 across the support surface 12 by a thin portion 14. The thin portion 14 forms an axis orthogonal to the axial direction of the spool shaft 6, and the chuck member 11 is rotatable around this axis. By lowering the chuck member 11 on the support surface 12, the chuck member 11 and the shaft member 10 form a cylindrical shape of the spool shaft 11.

The support surface 12 and the bottom surface 11a opposed thereto
Is made smaller than the thickness of the light-shielding paper 2. When the chuck member 11 is moved down to the support surface 12, the light-shielding paper 2 set on the support surface 12 is securely sandwiched between the two. Dimension A is 4 of the thickness of the light shielding paper 2
It is sufficient if it is 0 to 80%, preferably 0 to 0.12 m
m, more preferably 0.03 to 0.1 mm. The dimension B of the axial section that forms the dimension A when the chuck member 11 is tilted on the support surface 12 is preferably 10 to 50 m.
m, more preferably 20 to 40 mm.

An elastic member 2 is provided at the other end of the chuck member 11.
The elastic member 21 is provided with an engaging claw 22.
Are provided integrally. The engaging claw 22 and the shaft member 1
The engagement claw 20 provided on the other side of the engagement member 20 constitutes an engagement means that engages when the chuck member 11 is tilted to the support surface 12 to inhibit the rotation of the chuck member 11. The lever piece 24 is integrally provided at the end of the elastic member 21. If the lever piece 24 is lifted, the engagement between the engaging claw 20 and the engaging claw 22 is released, and the chuck member 11 is raised.

The material of the spool shaft 6 is suitably high impact polystyrene, polypropylene, polyethylene, polycarbonate or the like.

In producing a photographic roll film,
First, the chuck member 11 is raised. Then, the rear end portion 2b of the light-shielding paper 2 is set on the support surface 12 in the dark room, and the chuck member 11 is tilted to the support surface 12 to engage the engagement claw 20 and the engagement claw 22, thereby making the chuck member 11 The rotation of is prohibited. The rear end 2b is composed of a support surface 12 and a bottom surface 11 opposed thereto.
a and locked. By rotating the spool 5, the photo film 3 with the light-shielding paper 2 is wound around the spool shaft 6. After this winding is completed, the leading end portion 2a is slightly bent so that the photo film 3 with the light-shielding paper 2 is not loosened, and is attached with an adhesive tape.

When using a photographic roll film,
A used spool 5 having the same shape is set in advance as a winding shaft in a film winding chamber of a medium format camera. The rotation angle of the spool 5 is adjusted so as not to hinder the chuck member 11 from being raised.
Is turned to the back side of the camera, and the chuck member 11 is raised.
The adhesive tape is peeled off while pressing the light-shielding paper 2 with a finger so as not to be loosened. The photographic roll film is inserted into the film loading chamber, and the chucking groove 9 of the flange 8 is engaged with the key groove provided in the film loading chamber.

The leading end portion 2a of the light-shielding paper 2 is pulled out, set on the support surface 12 of the spool 5 on the film winding chamber side, and the chuck member 11 is lowered to the support surface 12. Then, the tip 2b is sandwiched between the bottom surface 11a and the support surface 12. In this state, the engagement claw 20 and the engagement claw 22 are engaged and the rotation of the chuck member 11 is prohibited. The front end portion 2a can be easily locked in between.

Next, the spool 5 is rotated by operating the winding lever, and the light shielding paper 2 is wound around the spool shaft 6. The back cover is closed after aligning the arrow printed on the outer surface of the light-shielding paper 2 with the start mark provided in the film passage. When the winding operation is further continued, the first frame is set in the aperture, the shutter is charged, and then the winding lever is locked. The shutter button is pressed down to perform a winding operation for each shooting. As a result, the photographic film 3 together with the light-shielding paper 2 is wound around the spool 5 of the film winding chamber by one frame.

The photographic film 3 with the light-shielding paper 2 is wound up, and when all photographing is completed, the winding lever is continuously operated to continue the winding operation. Support surface 12 and bottom surface 1
Since 1a is formed in a flat shape, the rear end 2b comes out smoothly with the winding operation. After that, open the camera back cover. The exposed photo film 3 with the light-shielding paper 2 is taken out of the film winding chamber while holding the rear end 2b from above so that the photo film 3 is not loosened. After attaching the attached adhesive tape to the roll surface of the rear end portion 2b to prevent the light-shielding paper 2 from winding and loosening, the photographed photo roll film is submitted to a developing dealer.

Next, another embodiment of a spool having a different shape will be described with reference to FIGS. Note that the same members as those in FIG. 1 are denoted by the same reference numerals as those in FIG. Here, the case where the leading end of the light-shielding paper 2 is attached to the spool shaft is described.

FIG. 2 shows a configuration in which a conical projection 30 is provided at the center of the bottom surface 11a of the chuck member 11. Support surface 1
When the front end portion 2a of the light-shielding paper 2 is set on the support member 2 and the chuck member 11 is tilted to the support surface 12, the protrusion 30 is moved to the front end portion 2a.
To lock the tip 2a. The dimension C between the tip of the projection 30 and the support surface 12 is preferably 0 to 0.1 m.
m, more preferably 0 to 0.06 mm.

FIG. 3 shows a structure in which a cylindrical projection 31 is provided on the bottom surface 11 a of the chuck member 11, and a hole 32 into which the projection 31 partially enters is provided on the support surface 12. When the tip 2a of the light-shielding paper 2 is set on the support surface 12 and the chuck member 11 is fallen down on the support surface 12, the tip 2a is pushed into the hole 32 by the projection 31 and engaged therewith. When a light-shielding paper provided with locking holes for engaging the projections 31 at the front end and the rear end is used, the locking holes are aligned with the holes 32 and the chuck member 1 is used.
The projection 31 is engaged with the locking hole by tilting the shaft member 10 on the shaft member 10. Even when the locking hole is displaced from the hole 32, the light-shielding paper is pushed into the hole 32 as described above, so that locking is possible. The dimension D between the tip of the projection 31 and the bottom of the hole 32 is preferably 0 to 0.1 mm, more preferably 0 to 0.06 mm.

Further, as shown in FIG.
7 and the shaft member 39 may be configured as separate parts. A hook-shaped mounting portion 38 is provided at one end of the chuck member 37. On one side of the shaft member 39 sandwiching the support surface 40, a mounting shaft 4 provided orthogonally to the axial direction of the spool shaft 36 is provided.
1 is provided integrally, and a mounting part 38 is mounted on the mounting part 1 so as to be rotatable around a mounting shaft 41.
With such a configuration, it can withstand repeated use.

The projections may be provided on both the support surface and the bottom surface of the chuck member, or may be provided only on the bottom surface of the chuck member. Further, a plurality of protrusions and holes may be provided. Further, the present invention can be used for a 220 type photographic roll film in which a leader portion and a trader portion are provided at the leading end and the trailing end of the photographic film, respectively.

[0029]

As described above, according to the photographic roll film of the present invention, the spool shaft is sandwiched between the shaft member provided with the light-shielding paper setting support surface along the axial direction thereof. A chuck member provided on one side of the shaft member so as to be rotatable around an axis arranged orthogonally to the axial direction of the spool shaft;
Engaging means for engaging the chuck member by tilting the chuck member on the support surface to inhibit rotation of the chuck member in the state of being tilted on the support surface. The rotation of the chuck member is prohibited by the engaging means in a state where the light shielding paper is sandwiched between the support surface and the bottom surface of the chuck member facing the support surface. Since the light-shielding paper is locked between the bottom surface and the bottom surface, it is possible to easily and reliably lock the photographic film with the light-shielding paper to the spool shaft.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a first embodiment of a photographic roll film of the present invention.

FIG. 2 is an explanatory view of a second embodiment of the photographic roll film of the present invention.

FIG. 3 is an explanatory diagram of a third embodiment of the photographic roll film of the present invention.

FIG. 4 is an explanatory view of another embodiment of the spool shown in FIGS. 1 to 3;

FIG. 5 is a front view of the photo film with light-shielding paper.

[Explanation of symbols]

 2 Shading paper 3 Photo film 5 Spool 6 Spool shaft 10 Shaft member 11 Chuck member 12 Support surface

Claims (3)

[Claims] 1. A photo film in which a light-shielding paper is provided at least at a front end and a rear end of the photo film, and the photo film with the light-shielding paper is engaged with a spool shaft and wound around a spool shaft in a roll shape. In the roll film, the spool shaft is provided with a shaft member provided with a light-shielding paper setting support surface along the axial direction of the spool shaft, and one side of the shaft member sandwiching the support surface, which is orthogonal to the axial direction of the spool shaft. A chuck member rotatably provided around an arranged shaft, and engagement means for engaging the chuck member by tilting the chuck member on the support surface to inhibit rotation of the chuck member in a state of being tilted on the support surface. A light-shielding paper is set on the support surface, the chuck member is tilted to the support surface, and the light-shielding paper is sandwiched between the support surface and the bottom surface of the chuck member facing the support surface. Inhibits the rotation of the chuck member To, photographic roll film which is characterized in that so as to lock the backing paper between the bottom surface of the support surface and the chuck member. 2. The photographic roll film according to claim 1, wherein a light-shielding paper locking projection is provided on at least one of the support surface and the bottom surface of the chuck member. 3. A light-shielding paper locking projection is provided on at least one of the support surface and the bottom surface of the chuck member, and a hole is provided on the other of the projection to partially enter the projection. Photo roll film.