JPH06110159A - Photographic film cartridge - Google Patents

Abstract

PURPOSE:To obtain a photographic film cartridge in which the radius of curvature of an inserting member locking the trailing edge of photographic film in a spool is made large. CONSTITUTION:A cartridge main body 10 is constituted of upper and lower cases 7 and 8 made of an integrally molded product of resin, and further the spool 12. A pair of ribs is formed on the inner walls of the cases 7 and 8 so as to prevent the photographic film wound round the spool 12 in a roll state from being loosened. A film path 19 is formed on the joint of port parts 7a and 8a, and a cover member 14 is provided to be freely rotatable. A slit 20 is formed on the shaft part 12b of the spool 12, and a pair of catches 21 and a pressing rib 22 are provided inside the slit 20. The center line of the slit 20 is provided to be out of the center of the rotation of the spool 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film cartridge in which a photographic film is fed by rotating a spool in the film feeding direction.

[0002]

2. Description of the Related Art The most popular type 135 photo film cartridge has a thin metal plate cartridge body and two.
The cartridge body is composed of two caps, and the spool in which one end of the photo film is fixed and wound is stored in it. As a method for assembling this photographic film cartridge, as known from Japanese Patent Publication No. 2-691, there is a method in which the photographic film is wound around a spool and prepared, and the film is wrapped in a cartridge body by working in a dark room.

Further, in Japanese Patent Application Laid-Open No. 49-107732 and Japanese Patent Application Laid-Open No. 52-77723, a cartridge main body incorporating an empty spool is formed in a bright room and formed in the cartridge main body. Insert a tongue-shaped guide plate into the film passage. Using this as a guide, insert the photo film into the main body of the cartridge from the rear end side, lock the rear end of the photo film on the spool, and then rotate the spool to wind the photo film into the main body of the cartridge. ing.

On the other hand, as can be seen in US Pat. Nos. 4,834,306, 4,846,418 and Japanese Patent Laid-Open No. 3-37645 by the present applicant,
A photographic film cartridge having a function of assembling the main body of the cartridge with a resin molded product and sending the photographic film out of the main body of the cartridge by rotating the spool is known. This photo film patrone is different from the previous ones, and the leader part of the photo film does not protrude from the patrone body in both unused and used condition, so not only can the photo film be stored more densely,
It has the advantage that it can be easily handled before and after use.

A method of winding a photographic film into such a photographic film cartridge is disclosed in Japanese Patent Application No.
212135. According to the method, an insert member that can be inserted into and removed from the cartridge body through a film passage of the cartridge body that has been preassembled is used, and a front end portion of the insert member holds a rear end portion of the photographic film. Then, the photographic film is passed through the film passage of the main body of the cartridge together with the insertion member, and its rear end is locked by the rear end locking means formed on the spool. After that, the insertion member is pulled out from the cartridge main body, the spool is driven in the winding direction of the photo film, and the photo film is wound inside the cartridge main body while being wound around the spool.

Similarly, in the method of separating the photographic film from the cartridge main body proposed in the above specification, first, the photographic film is pulled out from the cartridge main body until the winding amount around the spool becomes less than one turn. After that, the separation member is inserted into the cartridge body from the film passage provided in the cartridge body to release the lock between the spool and the rear end of the photograph film, and the photograph film is pulled out to separate the photograph film from the cartridge body. I am trying to do it.

[0007]

However, there is a drawback in that the force required to insert the insert member and the separating member into the spool by the above method is too large and the insert member and the separating member are deformed. In addition, since the insertion member and the separating member have smaller radii of curvature, when the inserting member and the separating member are passed through the narrow film passage, the film passage is rubbed to damage or wear the cartridge body, and the hair of the teremp is turned upside down. It sometimes hindered the delivery of the film.

The present invention has been made in consideration of the above problems of the prior art. By increasing the radii of curvature of the insertion member and the separation member, the insertion resistance to the spool is reduced and the clearance with the film passage is minimized. The purpose is to provide a photographic film cartridge that can be taken large.

[0009]

In order to achieve the above object, the center line of the slit having the film locking portion and the pressing rib of the spool is deviated from the center of rotation of the spool.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, which shows an example of a photographic film cartridge embodying the present invention, a cartridge main body 10 is composed of an upper case 7 and a lower case 8 which are integrally molded of resin, and a spool 12. A pair of ribs 15 are formed on the inner walls of the upper and lower cases 7 and 8, and the spool 12 in which the photographic film is wound in a roll shape is attached to the upper and lower cases 7 and 8.
The rib 15 contacts the outermost periphery of the photographic film and prevents the spool 12 from being loosened when it is housed inside. Therefore, when the spool 12 is rotated in the film feeding direction (clockwise in the figure), the film roll is also rotated in the same direction as the spool 12. Reference numeral 17 indicates a tip separating claw, and when the film roll is rotated together with the spool 12, the tip separating claw 17 scoops the tip of the photographic film.

The upper and lower cases 7 and 8 have port portions 7a and 8a.
Is provided, and when the upper and lower cases 7 and 8 are combined and integrally connected, a film passage 19 is formed at the joint of the port portions 7a and 8a. A lid member 14 is incorporated between the port portions 7a and 8a. Rotational support portions 14a are provided at both ends of the lid member 14, and the lid member 14 is rotatable about an axis parallel to the rotation axis of the spool 12. A key 16 is further provided at one end of the rotation support portion 14 a, and is exposed on the side surface of the cartridge body 10. Then, by fitting the lid opening member 18 to the key 16 from the outside and rotating the lid 16, the lid member 14 can be rotated between the opening position and the closing position of the film passage 19.

The spool 12 is integrally provided with a pair of flanges 12a, and the photographic film has these flanges 12a.
It is wound around the shaft portion 12b between a. Both ends of the spool 12 are exposed to the side surface of the cartridge main body 10, and a key 13 is provided on the exposed portion. As is well known, the key 13 is used to engage a member for driving the spool when the spool 12 is rotated. As shown in the figure, a notch 13a is provided at one end of the key 13.
The spool 12 is for winding a photo film (for example, 36 to 40 photos) having a large number of photographs, that is, a photo film having a long film length, and the shaft portion 12b has a diameter of, for example, about 5 mm to 10 mm.

A slit 2 is formed on the shaft portion 12b of the spool 12.
0 is formed. As shown in FIG. 2, a pair of locking claws 21 and a pressing rib 22 are provided inside the slit 20, and the pressing rib 22 projects downward between the locking claws 21. The left side of this slit 20 in FIG. 2 is the insertion port side, and the rear end of the photographic film is inserted through this insertion port. The slit 20 is provided so that the center line of the slit 20 is located off the center of rotation of the spool 12. If the distance between the center line of the slit 20 and the rotation center of the spool 12 is A ₁ , the value is, for example, 0.3 mm.
~ 4 mm. The thickness t of the upper portion of the spool 12 provided with the pressing ribs 22 is 0.3 mm to 1.5 mm.
(Preferably 0.8 mm to 1.2 mm), which is easily deformed.

As shown in FIG. 3, a pair of locking holes 25 are formed at the rear end of the photographic film 24, and the locking claws 21 engage with the locking holes 25. And press rib 2
In the case of No. 2, the rear end of the photographic film 24 is pressed so that it does not float up, so that the engagement between the engaging claw 21 and the engaging hole 25 is maintained, and the photographic film 24 can be removed even if a force is applied in the direction of pulling out the photographic film 24 from the slit 20. There is no. At the rear end of the photographic film 24, a pair of holes 26 are formed outside the locking hole 25, and these holes 26 are used when the photographic film 24 is inserted into the slit 20.

FIG. 4 schematically shows a device for locking the rear end of the photographic film 24 in the cartridge body 10 having the above-mentioned structure. This device includes a spool 1 mounted on a cartridge main body 10 composed of upper and lower cases 7 and 8.
2. Used when the photo film 24 is wound around the spool 12 after the lid member 14 is assembled. A receiving portion 31 corresponding to the outer shape of the cartridge body 10 is formed in the base block 30 to receive the cartridge body 10. A pressing arm 32 driven by, for example, a hydraulic cylinder device or a link mechanism (none of which is shown) is attached to the base block 30. When the cartridge body 10 is supplied to the receiving portion 31, the cartridge body 10 is opened. Hold down.

The patrone body 1 is held by the pressing arm 32.
When 0 is pressed down, the cartridge body 10 is held in a fixed posture by the shape of the receiving portion 31 and the port receiving portion 33, and the entrance of the film passage 19 is also fixed in a fixed position. A pair of arms 35 is provided on both sides of the base block 30.
Is rotatably attached by a shaft 35a and is rotated by driving a stepping motor (not shown). The arms 35 are connected by a mounting plate 37, and a claw plate 39 is fixed to the mounting plate 37. The claw plate 39 is made of a flexible metal thin plate that is curved in an arc shape, and has a pair of arms protruding in the shape of an arm provided with claws 39a. Since the center line of the slit 20 of the spool 12 and the intersection of the locking claw 21 and the pressing rib 22 provided on the shaft portion 12b are deviated from the center of rotation of the spool 12, the radius of the curved surface of the claw plate 39 is increased (for example, R18 mm- R30 mm) is possible.

A slide frame 40 is incorporated on one side surface of the base block 30 so as to be movable between a position close to the side surface of the cartridge main body 10 and a position apart from the side surface. The slide frame 40 includes a fork member that engages the key 13 of the spool 12, a motor that drives the fork member, a lid opening member 18 that engages the key 16 of the lid member 14, and a drive unit 41 that includes a motor that drives the lid opening member 18.
Holding The slide frame 40 is in the retracted position until the cartridge body 10 is set in the receiving portion 31, and moves to the drive position after the cartridge body 10 is set in the predetermined position. As a result, the spool driving fork 41 a and the lid opening member 18 incorporated in the drive unit 41 are exposed to the side surface of the cartridge body 10, and the key 13 and the lid member 14 of the spool 12 are exposed.
Engage the key 16 of.

A photo sensor (not shown) is incorporated on the other side surface of the base block 30. The photo sensor detects the position of the notch 13a provided in the key 13 of the spool 12 and discriminates whether or not the spool 12 is at a constant rotation position. For this reason,
The same key 13 and notch 13a are provided on the side surface of the spool 12 on the other end side.

A film guide 45 is provided so as to face the base block 30. The film guide 45 is connected to the feeding device of the photographic film 24, and after one photographic film 24 is wound into the cartridge main body 10, the rear end portion of the photographic film 24 is stopped at a fixed position again. Therefore, when the rear end of the photographic film 24 is projected from the film guide 45, the hole 26 and the claw 39
The relative position to a is always constant.

FIG. 5 shows a receiving portion 31 of the cartridge body 10.
Also, the positional relationship between the cartridge body 10 and the arm 35 when the port receiver 33 is positioned in a fixed posture is shown. In the figure, point A indicates the intersection of the center line of the slit 20 and the shaft portion 12b when viewed from the direction of the rotation axis of the spool 12, and points B and C are the inner and outer upper and lower surfaces of the film passage 19, respectively. The center position is shown. Claw plate 39
The curved surface of the claw 39a, that is, the locus of the claw 39a is substantially equal to the arc formed by connecting the points A, B, and C, and the claw 39a and the claw plate 39 pass through the central portion of the film passage 19.

Therefore, when the arm 35 is rotated counterclockwise from the standby position shown in FIG. 5, the pawl 39a passes through the film passage 19 and enters the slit 20 formed in the shaft portion 12b of the spool 12. Become. At this time, the thickness of the upper portion of the shaft portion 12b of the spool 12 is 0.8 mm
Since it is easily deformed by about 1.2 mm, the insertion resistance of the claw plate 39 is as low as 300 gf to 700 gf.
0 gf to 1000 gf) There is little risk that the claw 39a will be deformed. The notch 13a described above is used to set the spool 12 at the rotational position shown in FIG.

The photographic film 2 is mounted on the main body 10 of the photographic film cartridge in which the present invention is carried out by the above apparatus.
The action of winding 4 will be described. As shown in FIG. 1, the cartridge main body 10 is assembled in a bright room with an empty spool 12 incorporated therein. Since it is assembled in a bright room, it is sure to incorporate another member such as the lid member 14, a display member before and after use and a spool rotation restricting member,
It can be done easily. The upper and lower cases 7 and 8 are firmly joined by ultrasonic welding or claw fitting, and the cartridge main body 10 itself is sent to the next step as a finished product.

The assembled cartridge main body 10 is sent to a dark room and set from above in the winding device of the photographic film 24 shown in FIG. When the cartridge main body 10 is set, the holding arm 32 is in the open position, and the slide frame 40 is in the retracted position. When the cartridge body 10 is set in the receiving portion 31, the pressing arm 32
Moves to the holding position, and the cartridge main body 10 receives the receiving portion 3
It is held in a fixed posture by 1 and the port portion receiver 33. After that, the slide frame 40 is moved to the driving position, the fork is coupled to the key 13, and the lid opening / closing member 18 is moved to the key 1.
Engage 6

When the engagement between the fork and the key 13 and the engagement between the lid opening / closing member 18 and the key 16 are confirmed, the drive unit 41 is actuated to wind the spool 12 in the winding direction of the photo film 24 (counterclockwise in FIG. 4). Drive). When the spool 12 is driven in this way, the photo sensor monitors the position of the notch 13a provided in the key 13 and sends a stop signal to the drive unit 41 when the notch 13a reaches a certain position. As a result, as shown in FIG.
The inlet side of the slit 20 formed in b is directed toward the film passage 19 side, and the spool 12 is stopped when the intersection A is located above the rotation center of the spool 12. It should be noted that the rotation position of the spool 12 can be adjusted to the above position while the cartridge body 10 is being conveyed to the receiving portion 31. In this case, the base block 30
Therefore, the photo sensor can be omitted.

Next, the lid opening / closing member 1 is driven by the drive unit 41.
8 is driven and the lid member 14 is rotated to rotate the film passage 19
Open up. After that, the arm 35 is rotated by a predetermined angle by driving the stepping motor. The claw plate 39 is rotated by the rotation of the arm 35, and the claw 39a is engaged with the hole 26 at the rear end portion of the photographic film 24. When the arm 35 further rotates, the claw 39a moves while capturing the rear end of the photographic film 24, and the photographic film 24 is pulled out from the film guide 45.

By the rotation of the arm 35, the claw 39a captures the rear end of the photographic film 24 while keeping the film passage 19 in place.
5 passes through points C and B shown in FIG. 5 and enters the cartridge main body 10. Further, the arm 35 is rotated counterclockwise, and the claw 39a enters into the slit 20 provided in the shaft portion 12b of the spool 12. Since the claw 39a moves while catching the rear end of the photographic film 24, the claw 3a
As 9a enters the slit 20, the rear end of the photographic film 24 is passed between the locking claw 21 and the pressing rib 22 provided at the back of the slit 20 as shown in FIG. The pawl 21 fits into the locking hole 25.

At this time, even if the claw plate 39 comes into sliding contact with the inner wall of the slit 20, the claw plate 39 itself has flexibility and the upper portion of the shaft portion 12b can be easily deformed. The claw 39a moves to a position where it almost passes through the slit 20 without being caught in the middle. It should be noted that in FIG. 3, the upper half is broken so that the pressing rib 22 is not shown.

When the rear end portion of the photographic film 24 is locked to the shaft portion 12b of the spool 12 in this manner, the arm 35 is rotated to the standby position shown in FIG. 5, whereby the pawl 39a is moved outside the cartridge body 10. Be pulled out. Since the locking claw 21 has a shape that prevents the photographic film 24 from moving in the pull-out direction, once the locking hole 25 is engaged with the locking claw 21, the claw plate 39 is removed from the slit 20. It does not come off from the locking claw 21 when it is pulled out. Also, nail 3
When pulling out 9 from the slit 20, it is possible to rotate the spool 12 counterclockwise to detach the claw plate 39 from the slit 20 before rotating the arm 35 in the return direction. It may be rotated to the original standby position.

After the arm 35 is returned to the standby position, the fork is driven by the drive unit 41 and the spool 1
2 is driven counterclockwise. As a result, the spool 12
The photo film 24 is wound around the shaft portion 12b from the rear end side. During this time, the photo film 24 has a spool 1
The photographic film 24 is pulled out from the film guide 45 by the tension caused by the rotation of 2, and the photographic film 24 is wound into the cartridge main body 10. Then, when the photographic film 24 passes through the film guide 45 to a predetermined length, the rotation of the spool 12 is stopped, and the cutter in the supplying device of the photographic film 24 operates to cut the photographic film 24. By this cutting, the leading end shape of the photographic film 24 which is being rolled up at present is shaped, and the locking hole 25 and the hole 26 are punched in the rear end portion.

When the photo film 24 has been cut, the spool 12 is driven again, and the photo film 24 is continuously wound around the cartridge main body 10. The drive of the spool 12 is stopped when the tip of the photo film 24 is wound into the cartridge main body 10. After that, the lid opening / closing member 18 is driven counterclockwise to move the lid member 14 to a position where the film passage 19 is blocked. As a result, the inside of the cartridge body 10 is completely shielded from light. Subsequently, the holding arm 32 moves to the release position, the cartridge body 10 with the photographic film 24 wound therein is taken out from the receiving portion 31, and a new cartridge body 10 is supplied to the receiving portion 31. After that, the same work is repeated.

FIG. 6 shows a case where the photographic film 24 is separated from the cartridge main body 10 contrary to the above-mentioned embodiment. This device is used in a dark room or a light room, and its basic structure is the same as that shown in FIG. First, the photographic film 24 is fully pulled out from the cartridge main body 10, and then the arm 35 is rotated counterclockwise so that the tip of the film separating plate 50 is along the lower surface side of the photographic film 24. Enter inside. In the state where tension is applied to the photo film 24, the inlet side of the slit 20 of the spool 12 faces the film passage 19, so that the front end of the film separating plate 50 passes through the slit 20 and enters the depth thereof. Note that it is also effective to detect the notch 13a with a photosensor in order to confirm whether the entrance side of the slit 20 is correctly directed to the film passage 19.

When the film separating plate 50 enters the slit 20, the pressing rib 22 formed on the upper surface of the slit 20 is pressed to bend the upper portion of the shaft portion 12b. Further, since the film separating plate 50 is inserted between the locking claw 21 and the photographic film 24, the locking hole 25 is removed from the locking claw 21 and the locking between the rear end of the photographic film 24 and the spool 12 is released. . When the film separating plate 50 is inserted, the emulsion surface of the photographic film 24 functions as an insertion guide, but since the rear end emulsion surface is not photographed, there is no problem with friction with the film separating plate 50.

At this position, the rotation of the arm 35 is temporarily stopped, and then the photographic film 24 is pulled out of the cartridge main body 10. Since the rear end of the photographic film 24 is separated from the spool 12, the photographic film 24 is entirely pulled out of the cartridge body 10. Thereafter, the arm 35 rotates in the opposite direction and returns to the standby state shown in FIG. After that, the same work is repeated.

In the case of a photographic film cartridge containing a pair of flanges provided with lips as shown in US Pat. No. 4,834,306, the width of the nail plate 39 and the film separating plate 50 is the width of the pair of flanges. It is preferably smaller than the lip spacing to avoid contact with the flange.

FIG. 7 shows another embodiment of the photographic film cartridge according to the present invention. In the above-described embodiment, the photographic film cartridge containing the photographic film 24 having a large number of photographs has been described, but the photographic film cartridge shown in FIG. 7 has a small number of photographs (for example, 10 to 28 photographs), that is, the film length. It is for winding a short photo film of. Therefore, the diameter of the shaft portion 60a of the spool 60 rotatably housed in the cartridge body 10 is larger than that of the above-described embodiment by φ11.
mm to φ13 mm.

A ₂ shown in the figure is the distance between the center of rotation of the spool 60 and the intersection of the center line of the slit 63 and the shaft portion 60a, which is the same as the spool 12 of the above-described embodiment (A
It is desirable that it is equal to or smaller than the amount of ₁ ).
Further, the angle θ formed by the line 64 parallel to the direction of the slit 63 and passing through the center of the spool 60 and the horizontal line 65 is preferably equal to or larger than the similar amount of the spool 12 of the above-described embodiment. Further, it is desirable that the angle ψ formed by the inclined line 66 and the horizontal line 65 of the surface of the locking claw 61 facing the film insertion side is equal to the same amount as the spool 12 of the above-described embodiment.

The photographic film cartridge containing the spool 60 for a photographic film having a small number of shots, which is constructed as described above, can be wound with the photographic film by the same device as in the above-mentioned embodiment and the same effect can be obtained. In addition,
Although the photographic film cartridge having the light-shielding lid member 14 has been described in the above embodiment, the film passage 19
The same is also effective for a photo film patrone in which a light-shield is attached by attaching a telemp.

[0038]

As described above, according to the photographic film cartridge of the present invention, the center line of the slit having the film locking portion and the holding rib of the spool is deviated from the center of rotation of the spool. Also, the insertion resistance of the separation member can be reduced, and the insertion member and the separation member are not likely to be deformed. Further, since the radius of curvature of the inserting member and the separating member can be increased, the resistance at the time of inserting the spool becomes stronger, and it is possible to prevent the photo film cartridge from being scratched or worn by rubbing against the film passage. Furthermore, it is possible to reduce the upside down when passing through the telem, and there is no hindrance to the film feeding.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a photographic film cartridge embodying the present invention.

FIG. 2 is a cross-sectional view of an essential part of the photographic film cartridge shown in FIG.

FIG. 3 is a locking portion with a rear end portion of the film of the photographic film cartridge shown in FIG.

FIG. 4 is an explanatory view of a device for winding a film around the photographic film cartridge shown in FIG.

5 is a cross-sectional view of the photographic film cartridge shown in FIG. 1 when the film is locked.

6 is a sectional view of the photographic film cartridge shown in FIG. 1 when the film is separated.

FIG. 7 is a sectional view of another embodiment of the photographic film cartridge according to the present invention.

[Explanation of symbols]

 10 Patrone Main Body 12 Spool 12b Shaft 13 Key 14 Lid Member 19 Film Passage 20 Slit 21 Locking Claw 22 Holding Rib 24 Photo Film 26 Locking Hole 35 Arm 39 Claw Plate 39a Claw 50 Film Separation Plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Takahashi, 210, Nakanuma, Minamiashigara, Kanagawa Prefecture, Fuji Photo Film Co., Ltd. (72) Haruo Ichikawa, 210, Nakanuma, Minamiashigara, Kanagawa Prefecture, Fuji Photo Film Co., Ltd.

Claims (1)

[Claims] 1. When not in use, even the leading edge of the photographic film is completely stored in the cartridge body, and the spool rotatably provided in the cartridge body is rotated in the film feeding direction to feed the photographic film. In the photographic film cartridge as described above, the center line of the slit having the film locking portion and the pressing rib of the spool is deviated from the rotation center of the spool.