JPH06295019A - Spool for photographic film - Google Patents

Abstract

PURPOSE:To prevent a teremp from being damaged and to omit the positioning process of a spool by inserting a guide afterwards in the photographic film cartridge manufactured by winding the photographic film to a cartridge main body in which assembling is completed. CONSTITUTION:The guide 34 and a slit 31 are provided on a winding shaft constituting the spool 33, and an engaging pawl engaging the photographic film is provided inside the slit 31 along the shaft direction of the winding shaft, and the spool 33 is assembled in a state where the guide 34 protrudes from the film gateway of the cartridge main body. Thus, the teremp is prevented from being damage by the guide of an external device, and the insertion, the engaging, the locking of the film, and the positioning of the spool are easily performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film spool in which a photographic film is wound in a photographic film cartridge and rotatably accommodated therein, and more particularly to a photographic film spool in which an end portion of the photographic film is locked. Is.

[0002]

2. Description of the Related Art Of the currently widespread photographic films, a 135 type photographic film is wound around a winding shaft to obtain ISO.
There is a case that is housed in a case called a patrone that has the external dimensions determined by the standard. This photo film cartridge has a constant outer dimension regardless of the number of photo films taken, and its structure is, as shown in FIG. 7 to FIG. 8, covered with a body plate 3 made of a thin metal plate which is rolled into a tubular shape. A cartridge body 6 including caps 4a and 4b and a light-shielding telempe 5a attached to the port portion 5 formed on the body plate 3, and a spool 7 is rotatably housed inside the cartridge body 6. Then, the photographic film 8 is wound around the pair of flanges 7a to form the photographic film cartridge 2.

In such a photographic film cartridge, each element constituting the main body of the cartridge is manufactured and assembled by sheet metal pressing or resin molding. The most devised of the patrone assembling process is the photographic film winding process. There are several methods for the winding process.The method is to incorporate the spool around which the photo film is wound into the cartridge body, and to lock the end of the photo film to the spool in the already assembled cartridge body. It is roughly divided into a method of winding the photo film inside the Patrone body.

As a method for incorporating the spool around which the photographic film is wound into the main body of the cartridge, Japanese Patent Publication No.
There is a film winding method and device disclosed in Japanese Patent Publication No. 691. This is shown in FIG.
Using the spool 11 having only the winding shaft 9 and the flange 10 known in Japanese Patent Publication No. 996, the photographic film 12 is inserted into the locking hole 13 formed in the winding shaft 9 and engaged with the engaging claw 14 to rotate the spool 11. The photo film 12 is wound up by doing so, and the spool 11 in which the photo film 12 is wound into a roll is inserted into the Patrone body 6 made of a metal thin body plate as shown in FIG. 7 to be assembled. Is. In this construction method, all must be done in a dark room, and troublesome repairs and maintenance of the device are troublesome.

On the other hand, as a method of locking the end of the photographic film to the spool in the already assembled cartridge body and winding the photographic film into the cartridge body, a spool similar to the above is used. Japanese Patent Laid-Open No. 49-107732 discloses a method in which a photographic film is automatically engaged with a spool in the cartridge body after the cartridge body is first assembled, and the spool is wound up.

In the above construction method, except for the wrapping of the photographic film into the main body of the cartridge, it is possible to work in a bright room. Therefore, the assembly apparatus of the main body of the cartridge can be easily recovered from failures, and normal maintenance can be easily performed. improves. Although the process of winding the photo film needs to be performed in a dark room, the supply of the empty film cartridge from the device to the transfer of the photo film, the engagement with the spool in the film cartridge, the detection of the photo film length, Since the process of cutting the photo film after the completion of winding and unloading the completed photo film cartridge can be done automatically as a single device, it is possible to efficiently manufacture the photo film cartridge together with assembling the main body of the cartridge in a light room. be able to.

An example of an apparatus for automatically winding a photographic film on a spool in the cartridge body as described above is shown in FIGS. 10 and 11. After setting the cartridge main body 17 in the receiving portion 16 provided in the base block 15 which is the base of the apparatus, the pressing arm 18 driven via, for example, a hydraulic cylinder device presses the cartridge main body 17 and positions it. A fork member is engaged with the spool 19 of the cartridge body 17, and a photo sensor detects a notch 19a formed in the spool 19 to identify whether the spool 19 is at a constant rotation position. If they are out of position,
A drive device that drives the fork member positions the spool 19.

A pair of arms 20 provided on both side surfaces of the base block 15 are rotated counterclockwise about a shaft 20a by driving a stepping motor, and are attached to the arms 20. A claw 21 a provided at the tip of 21 engages with the end of the photographic film 23 positioned by the film guide 22. The arm 20 continues to rotate as it is, and the port portion 24 of the cartridge main body 17
Is inserted into. The photo film 23 together with the nail plate 21
Enter the slit 25 of the spool 19 that has been positioned,
It is engaged with a locking claw 26 provided in the slit 25.

When the engagement between the photo film 23 and the locking claw 26 is completed, the arm 20 is rotated clockwise to return to the initial position, the fork is driven to rotate the spool 19, and the photo film 23 is rotated. Roll up. When the photographic film 23 is wound up to a predetermined length, the rotation of the spool 19 is stopped and the photographic film 23 is cut. The cartridge main body 17 in which the photographic film is wound is taken out from the receiving portion 16, and a new cartridge main body 17 is supplied to the receiving portion 16. After that, the same work continues.

[0010]

However, the above-described winding method has a drawback that the light-blocking telemeps attached to the upper and lower inner wall surfaces of the port portion are damaged when the metal thin plate is inserted into the cartridge body. It was Since the telemps are made of pile-woven cloth with long naps, they are easily damaged, and if the telemps are damaged, the light-shielding performance of the patrone may be impaired. In addition, the spool positioning required to automatically perform the photo film winding process requires a complicated control unit and drive unit, which increases the cost of the device itself, and further reduces the time required for the positioning to reduce productivity. There is.

The present invention has been made in consideration of the above-mentioned problems of the prior art. In a photographic film cartridge manufactured by winding a photographic film into an assembled cartridge main body, a telemeter is provided by inserting a guide into a port portion. It is an object of the present invention to provide a spool for a photographic film, which is capable of preventing scratches on the film and further omitting the spool positioning step.

[0012]

In order to achieve the above object, according to the invention of claim 1, a slit formed along the axial direction of a spool shaft and into which one end of a photographic film is inserted is provided. A locking claw that engages a hole formed in one end of the photographic film that has been inserted into the slit and locks one end of the photographic film on the winding shaft, and the tip projects from the film entrance provided on the Patrone body, An end is integrally connected to the winding shaft, and a thin plate for guiding one end of the photographic film inserted from the film entrance / exit toward the slit is provided. As a result, it is possible to prevent damage to the telempon due to the guide being inserted from the film entrance / exit.

According to the second aspect of the present invention, the thin plate is connected through a thin portion by a recess provided at the boundary with the winding shaft, and the recess is formed on a surface opposite to the guide surface of the photographic film. It is provided. Thus, the thin plate can be easily separated after the photo film is engaged with the spool. Further, since the concave portion is on the back side of the guide surface, it is not scratched when guiding the photographic film.

[0014]

1 and 2 show a first embodiment of the present invention, which is an engaging claw 30 for engaging a photographic film.
A tongue-shaped thin plate guide 34 is integrally formed on a spool 33 including a winding shaft having a slit 31 formed on its inner surface and flanges 32a and 32b arranged at both ends thereof. is there. The width of the guide 34 is substantially the same as the width of the photographic film 35 so that the teremp 37 can be spread over the entire area in order to improve the insertability of the photographic film 35 into the port portion 36.

The length of the guide 34 must be slightly projected from the port portion 36 so that the photographic film 35 can be easily guided to the port portion 36. The amount of protrusion from the port portion 36 is also necessary as a knob allowance for pinching and pulling the tip end portion of the guide 34 in order to separate the guide 34 from the spool 33 after the photo film 35 is engaged with the spool 33. After assembling into the cartridge body 38, the tip of the guide 34 is erroneously pushed into the cartridge body 38, and the guide 34 is prevented from being caught in the cartridge body 38 due to vibration during conveyance to the next process. As for the amount of protrusion of the tip portion of the guide 34, it is necessary to project 5 to 15 mm from the port portion 36.

The wall thickness of the guide 34 is preferably as thin as possible. Photo When the photo film 35 is guided by the guide 34 and inserted into the port 36, or when the photo film 35 is conveyed after being inserted until it engages with the spool 33, the photo film 35 has a large running resistance. There is a possibility that the film 35 is bent and the image pickup surface is damaged. Further, the thinner the meat pressure, the less the influence on the telem 37.
However, since the guide 34 is a resin product integrally molded with the spool 33, the moldability deteriorates if it is too thin. As a result of an experiment in consideration of the above, the thickness of the guide 34 is preferably 0.3 mm or less.

The location where the guide 34 is provided is the slit 3
1 is formed integrally with the spool 33 so as to straddle the slit 31 on the immediate upper side of 1. The thin portions 34a and 34b provided at the boundary between the guide 34 and the spool 33 are formed thinner than the thickness of the guide 34, and the spool 33 is provided with the photographic film 3a.
When the guide 34 is pulled away from the spool 33 after the engagement of 5, the thin portions 34a and 34b are separated from each other. Further, even when the film is directly wound together with the photographic film 35 without being separated, the thin film parts 34a and 34b are bent and wound, so that the guide 34 is provided inside the cartridge body 38.
Does not swell. The thin portions 34a and 34b are concave on only one side with respect to the guide 34, and the surface on which the thin portions 34a and 34b are provided is the back side of the film guide surface 34c. This is to prevent the photo film 35 from being scratched or scratched when the photo film 35 is inserted.

FIG. 3 shows a second embodiment of the present invention. The spool 33 itself is the same as the spool 33 of FIG. 1, but the guides are two elongated guides 39, 40. . By eliminating the central part of the guide, the separation from the spool 33 is facilitated, the material of the spool 33 can be saved, and the contact area of the photo film 35 with the photographing part is also reduced, so that the occurrence of scratches on the photo film 35 is also reduced. Also, the influence on the telem 37 is reduced. Both guides 39, 40
The width between the outer sides of the guide and the guide length are the same as the guide 34 described in FIG.
Same as. The gap between the guides 39 and 40 is made narrower than the width W of the leading edge of the photographic film shown in FIG. 4 so that the photographic film 35 is surely guided by the guides 39 and 40 from the port portion 36 to the slit 31. .

The location where the guides 39 and 40 are provided is also shown in FIG.
Similar to the above embodiment, it is provided immediately above the slit 31 and integrally formed with the spool 33. Thin portions 39a, 40 provided at the boundary between the guides 39, 40 and the spool 33
a is formed thinner than the thickness of the guides 39 and 40, and after the photo film 35 is engaged with the spool 33,
When pulling 40 away from the spool 33, the thin portion 39
a and 40a. Also, when the film 39 is wound together with the photographic film 35 as it is without being separated, the guides 39, 40 are not swollen in the cartridge body 38 because they are bent and wound at the thin portions 39a, 40a. The thin portions 39a and 40a are concave on only one side with respect to the guides 39 and 40.
a and 40a are provided on the back side of the film guide surface,
In the figure, designated as 39b and 40b. This is to prevent the photo film 35 from being scratched or scratched when the photo film 35 is inserted.

FIG. 5 shows a third embodiment of the present invention, in which a bent portion 41c is provided at the tip of a guide 41. The bent portion 41c is integrally formed when forming the spool. The bent portion 41c can prevent the guide 41 from being caught in the cartridge body 38 due to vibration during transportation after the spool 33 is assembled in the cartridge body 38. Further, after the photographic film 35 is engaged with the spool by the guide 41, when the unnecessary guide 41 is separated from the spool 33, a force is easily applied by grasping the bent portion 41c, and the guide 41 and the spool are easily attached. 33 can be separated from the thin portions 41a and 41b. However, due to the shape of the bent portion 41c, it cannot be wound inside the cartridge body 38.

FIG. 6 shows a fourth embodiment of the present invention in which a bent hole 42c provided at the tip of the guide 42 is provided with a hook hole 43. A movable part having a pin or the like that engages with the hook hole 43 is provided in advance in a film guide or the like of the film winding device described in the conventional example, and after the photo film 35 engages with the locking claw 30 of the spool 33, By operating the movable part in a direction away from the cartridge main body 38, the spool 33 and the guide 42 can be automatically separated from the thin parts 42a and 42b.

In the method of locking the photographic film and the spool in each of the above-described embodiments, the photographic film is inserted into the main body of the cartridge along the guide and is hooked on the engaging claw of the slit provided on the spool shaft. However, the end of the photographic film is joined to the tip of the integrated guide of the present invention,
It is also possible to wind up the photo film with the guide.

Further, as a method of integrating the guide and the spool, in each of the above-described embodiments, a method of performing injection molding or the like using the same material is used. With this method, molding can be done in a single step, but it is necessary to prevent burrs from appearing so as not to damage the photographic film or the teremp. The materials used for spools are high impact polystyrene, polyethylene, vinyl chloride, nylon, polyethylene terephthalate, and polycarbonate. As another method, the material of the guide may be formed by using a metal or a resin different from that of the spool, and the guide may be inserted into the winding shaft portion of the spool.

Next, the operation of the spool for photographic film of the present invention will be described. The cartridge 34 and the spool 33 are integrally formed by injection molding, or separately and then combined to form a cartridge spool. The cartridge spool is a port section 36 of a cartridge body 38 formed of a thin metal plate.
From the above, the guide 34 is inserted and completed so that the tip end portion thereof projects. When this assembly is completed, the opening of the slit 31 provided on the winding shaft of the spool 33 and having the engaging claw 30 faces the port portion 36 of the cartridge body 38 and is positioned. Since all the work up to this point is performed in a bright room, it is easy to repair and maintain the assembly device for failures.

The cartridge main body 38 is set in a device as shown in FIG. Then, the fork member provided on the side surface of the cartridge body 38 engages with the spool 33.
The photo film 35 is a film guide surface 34 of the guide 34.
The photo film 35 is fed out by the film feeding device, is inserted into the port portion 36 along the film guide surface 34c of the guide 34, and is pushed into the cartridge main body 38 by pushing the telem 37 separately. It

The inserted photo film 35 is attached to the guide 3
The film guide surface 34c of No. 4 enters the slit 31 provided on the winding shaft of the spool 33. The locking hole 35a formed at the end of the photographic film 35 has a slit 31
It engages with and is locked by a locking claw 30 provided inside.

After that, the guide 34 is manually pulled and separated from the spool 33 by the thin portions 34a and 34b. If the guide 41 provided with the bent portion 41c shown in the third embodiment is used, this separating operation can be performed more easily. Further, a guide having a hooking hole 43 in the bent portion 42c like the guide 42 shown in the fourth embodiment is used, and a movable pin is engaged with the hooking hole 43 in advance so that the photographic film 35 is engaged. It is also possible to move the pin at the end of the assembly and automatically separate the guides. It is also possible to wind the photo film 35 as it is into the cartridge main body 38 without separating the guide.

When the guide 34 is separated, the spool 33 is rotated by the driving device, and the photo film 35 is wound into the cartridge main body 38. At this time, the photographic film 35 is monitored by a film length measuring device or the like, and when the photographic film 35 having a predetermined length is caught in the cartridge 38, the rotation of the spool 33 is stopped. After that, the leading end of the photographic film 35 is cut. The cartridge main body 38 in which the photographic film is wound is taken out from the apparatus, a new cartridge main body 38 is loaded, and the operation is repeated.

[0029]

As described above, according to the spool for a photographic film of the present invention, the slit formed along the axial direction of the winding shaft which constitutes the spool and the hole of the photographic film inserted through the slit. The photographic film is provided with a locking claw for locking one end of the photographic film to the winding shaft, and a thin plate guide whose front end projects from the film entrance and exit and whose rear end is integrally connected to the winding shaft. Can be easily inserted into the entrance and exit of the film, and the inserted photographic film is always inserted into the slit of the winding shaft so that it can be securely engaged and locked.

Further, unlike the conventional example, it is not necessary to insert a guide made of a thin metal plate afterwards to engage the photographic film, so that it is possible to prevent the damage of the telem and at the stage when the cartridge body is assembled. Since the positioning in the rotation direction is automatically performed, the subsequent positioning step is unnecessary, and the cost of the device for automatically winding the photographic film can be reduced. Further, since the main body of the cartridge can be assembled in a bright room, the photographic film cartridge can be efficiently manufactured.

Further, since the concave portion provided at the boundary between the thin plate guide and the winding shaft is provided on the surface opposite to the guide surface of the photographic film, it is possible to insert the photographic film into the grip or the photographic film when the photographic film is inserted. Does not cause scratches.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a spool for photographic film according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts of a photographic film cartridge using the photographic film spool of the first embodiment.

FIG. 3 is a perspective view showing the outer appearance of a spool for photographic film according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a photographic film used in the spool for photographic film of the present invention.

FIG. 5 is a perspective view showing the outer appearance of a photographic film spool according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing the outer appearance of a spool for photographic film according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing the appearance of a photographic film cartridge described in a conventional example.

8 is a cross-sectional view of a main part of the photographic film cartridge shown in FIG.

FIG. 9 is a cross-sectional view of a main part of the spool described in the conventional example.

FIG. 10 is an explanatory view showing an example of the film winding device described in the conventional example.

FIG. 11 is a partial explanatory view of the device of FIG.

[Explanation of symbols]

 30 Engagement Claw 31 Slit 33 Spool 34, 39, 40, 41, 42 Guide 35 Photo Film 35a Locking Hole 36 Port Part 38 Photo Film Patrone

Claims (2)

[Claims] 1. A spool for a photo film, which is rotatably housed in a main body of a photo film cartridge having a light-shielding function and integrally provided with a winding shaft around which the photo film is wound. A slit that is formed and into which one end of the photographic film is inserted, and a locking claw that engages with a hole formed in one end of the photographic film that has been inserted through this slit and that locks one end of the photographic film to the reel. A thin plate that has a front end protruding from a film entrance / exit provided in the cartridge body, a rear end integrally connected to the winding shaft, and one end of a photographic film inserted from the film entrance / exit directed toward a slit. Spool for photo film, which is characterized by. 2. The thin plate is connected through a thin portion by a recess provided at a boundary with the winding shaft, and the recess is provided on a surface opposite to a guide surface of the photographic film. The spool for a photographic film according to claim 1.