JP3530256B2 - Method of manufacturing film unit with lens - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a film unit with a lens, and more particularly to a method for loading a photographic film cartridge.

[0002]

2. Description of the Related Art A film unit with a lens, in which a simple photographing mechanism such as a photographing lens and a shutter mechanism is incorporated, and a photographic film cartridge is preliminarily loaded, for example, "Sharan Lun Super 800 (trade name)", etc., is filed by the applicant. It is manufactured and sold. As is well known, the film unit with a lens has a unit body in which various photographing mechanisms are incorporated,
It is composed of a paper box that decoratively covers the operation parts of the unit main body while exposing them.

The photographic film cartridge is loaded in a dark room, and the unit main body is supplied in a dark room with all components except the rear cover assembled on the back side, and the photographing lens and the like are exposed. It is fixed on a support such as a pallet with the front side facing downward. The patrone is held by the patrone holding part that constitutes the loading device, and the photo film pulled out from the patrone is slightly separated from the patrone holding part, which is slightly longer than the distance between the patrone storage chamber and the film roll chamber. It is wound around a winding shaft arranged above the section. These cartridge holders and winding shafts are arranged so as to face the lower surface of the unit body,
It is moved linearly toward the cartridge storage room and the film roll room. As a result, the cartridge is loaded into the cartridge storage chamber, and the drive shaft of the winding knob is engaged with the end of the spool.

At this time, the roll of the photographic film is not yet loaded in the film roll chamber because the winding shaft is located above the cartridge holder. In this way, the roll of the photo film is arranged above the patrone because the photo film passed between the patrone and the roll of the photo film is arranged between the patrone storage chamber and the film roll chamber. This is to avoid interfering with the aperture being used. This is because the aperture of the lens-fitted film unit is curved in a convex shape toward the back side in order to correct the field curvature due to the plastic photographing lens manufactured at low cost.

Then, the photographic film wound around the take-up shaft is loaded into the film roll chamber from the back side, and at this time, the cartridge rotates around the spool. After that, a rear cover is attached to the back side of the main body base so as to cover the cartridge storage chamber and the film roll chamber, and the winding shaft is pulled out from the film roll chamber. After the winding shaft is taken out, the bottom lid integrally formed with the rear cover is closed to cover the bottom surfaces of the cartridge storage chamber and the film roll chamber in a light-tight manner.

Further, there have been proposed a number of lens-fitted film units loaded with a photographic film cartridge using a plastic cartridge. In this plastic patrone, the photographic film is completely wound up to the inside when not in use, and when used, the spool is rotated to guide the leading end of the photographic film to the entrance and exit of the film and send it out. Further, there is one that uses a plastic lid member that is rotatable between an open position that opens the film entrance and a closed position that shuts the film entrance to shield the film entrance and exit. Such a lid member must be securely closed when the cartridge is taken out of the lens-fitted film unit.
Therefore, various inventions have been proposed in which a rotating mechanism for rotating the lid member to the closed position when the cartridge is taken out is provided in the upper portion of the cartridge storage chamber and is engaged with the end portion of the lid member.

[0007]

In the above plastic cartridge, when loaded in the cartridge storage chamber, the spool is engaged with the winding knob and the lid member is engaged with the rotating mechanism. Therefore, there is a problem that it is impossible to rotate the cartridge around the spool to load the roll-shaped photographic film into the film roll chamber from the back side. In order to solve this, you can load the film cartridge and the roll of the photo film side by side at the same height, but to prevent the photo film and the aperture from interfering with each other, the aperture is a separate part from the base of the photo film cartridge. The aperture must be assembled after loading. In this method, the number of parts and the number of assembling steps are increased, resulting in cost increase.

Further, the photographic film has a property that when the winding diameter is small (the radius is 5.5 mm or less), the curling tendency is remarkably generated. When the photo film with curl is rolled up on a plastic patrone,
There is a problem that the photographic film cannot be sent out of the cartridge. To solve this, the outer diameter of the winding shaft should be 11 mm or more, or the outer diameter should be 11 mm.
It is conceivable to wind up the photographic film with the following winding shaft, load it into the film roll chamber, and then loosen it. However, in the former method, a gap is provided between the roll of the photographic film and the inner wall of the film roll chamber so that the inner wall of the film roll chamber and the roll of the photographic film do not come into contact with each other at the time of loading so as not to scratch the photographic film. Since it is necessary, there is a problem that the film roll chamber becomes large. In the latter method, if the roll of the photo film is unwound before the back cover is assembled, the photo film will not be attached to the back cover because the roll is too loose and the back cover cannot be assembled. There is a problem that it is not caught and is not loosened due to friction with the inner wall of the film roll chamber.

The present invention has been made in view of the above problems, and manufactures a lens-fitted film unit in which a photographic film is loaded without interfering with an aperture and the photographic film in a film roll chamber is surely unwound. The purpose is to provide a method.

[0010]

In order to solve the above problems, a method of manufacturing a lens-fitted photo film unit according to the present invention is designed so that a photographic film is bent in the vicinity of a film entrance / exit of a cartridge, and a film roll is a unit more than a cartridge. It is arranged at a position away from the back side of the main body, and after loading the cartridge in the cartridge storage chamber, the photo film is bent to the opposite side at the bending portion so that the film roll is loaded from the back side into the film roll chamber. Is.

[0011] in which the bent portion of the photograph film and the abutting guide arranged near the film entrance.

Further, in the method of manufacturing a lens-fitted film unit according to claim 1 , the photographic film has an outer diameter of 11 mm.
It is wound around the following winding shaft and stored in the film roll chamber, after the rear cover is assembled, the winding shaft is pulled out from the film roll chamber and then loosened so that the inner diameter of the roll of the photo film is 11 mm or more. It was done like this.

According to a second aspect of the present invention, there is provided a lens-fitted film unit manufacturing method, wherein a winding shaft is used to wind a photographic film.
Ri after releasing the driving force in the direction opposite to the direction rotated by a predetermined amount, is obtained as withdrawn from the film roll chamber.

Further, in the method for manufacturing a lens-fitted photo film unit according to a third aspect of the present invention, the end face of the photo film roll is pressed and unwound by the take-up shaft after being taken out from the photo film roll. Is.

According to a fourth aspect of the present invention, there is provided a method for manufacturing a lens-fitted photo film unit, wherein after taking up the take-up shaft, mechanical impact is applied to unwind the photographic film roll.

Further, in the method for manufacturing a lens-fitted film unit according to a fifth aspect of the present invention, a mechanical shock is applied by hitting with a hammer or the like.

According to the sixth aspect of the present invention, there is provided a method for manufacturing a lens-fitted photo film unit, wherein mechanical shock can be generated by vibration such as low-frequency ultrasonic waves.

[0018]

The photographic film is bent near the film entrance / exit passage, and the film roll is arranged at a position farther from the rear side of the unit body than the cartridge. Then, the cartridge is loaded into the cartridge storage chamber from the lower surface side. This prevents the photo film from interfering with the aperture. Further, a guide may be arranged near the entrance and exit of the film, and the photographic film may be bent along the guide. In this case, it is possible to prevent the photo film from being scratched by the parts assembled to the film entrance / exit of the cartridge. After loading the cartridge, the film roll wound around the take-up shaft having an outer diameter of 11 mm or less is loaded into the film roll chamber from the back side, and the rear cover is assembled. Then, the winding shaft is rotated by a predetermined amount in a direction opposite to the film winding direction to release the driving force, and then the film is extracted. As a result, the film roll is surely wound and loosened, and the inner diameter of the film roll becomes 11 mm or more. Further, the end of the film roll may be pressed and loosened by the taken-up winding shaft. Further, the assembled lens-fitted film unit may be mechanically impacted to loosen the film roll. The mechanical shock is given by hitting with a hammer or the like, or vibration such as low-frequency ultrasonic waves.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2 showing the outer appearance of a lens-fitted photo film unit, a lens-fitted photo film unit 2 comprises a unit main body 3 having a built-in photographing mechanism and a paper box 4 for storing the same.
It consists of and. The paper box 4 has a contour that exposes the winding knob 5, the strobe light emitting unit 6, the shutter button 7 and the like incorporated in the unit main body 3, and the photographing lens 8, the finder 9 and the number-of-photographs display window 1.
A hole for exposing 0 and the like is provided. Further, a strobe charging switch 11 is provided below the strobe light emitting section 6.
Is provided.

In FIG. 3 showing the structure of the unit main body 3, the unit main body 3 includes a main body base portion 13, a photographic film cartridge 14 housed in the main body base portion 13, and a front and rear side of the main body base portion 13. Cover 1
5 and a rear cover 16, and an exposure unit 35 and a strobe unit 36 (see FIG. 1) mounted on the front surface of the main body base 13. The photo film patrone 14 is a patrone 17 made of plastic.
And a photographic film 18 pulled out from the cartridge 17 and the photographic film 18 is wound into a roll to form a film roll 18a.

The main body base 13 is made of opaque plastic, and the photographic film 1 is provided at the center portion on the back side.
Aperture 20 that determines the exposure range for 8 is formed. The aperture 20 is curved in a convex shape toward the back side in order to correct the field curvature of the photographic film 18. A light-blocking tube 19 (see FIG. 1) that covers the photographing optical path in a light-tight manner is formed on the front side of the aperture 20, and the above-described exposure unit 35 is attached to the front surface of the light-blocking tube 19.

A driven sprocket 38, which is incorporated in the exposure unit 35 and meshes with the perforations 23a and 23b of the photographic film 18, projects from an opening 37 formed above the aperture 20. The driven sprocket 38 is rotated by the transfer of the photo film 18 and serves as a drive source such as shutter charge and film winding stop.
The photographic film 18 of this embodiment has a large perforation 23a and a small perforation 2 per frame.
3b and one of which is provided one by one,
The driven sprocket 38 is also rotationally symmetrically provided with two pairs of large teeth 38a and small teeth 38b which mesh with the perforations 23a and 23b.

A cartridge storage chamber 21 for storing the cartridge 17 and a film roll chamber 22 for storing the film roll 18a are formed on both sides of the aperture 20. The cartridge storage chamber 21 projects toward the front side of the film roll chamber 22 and serves as a grip 39 at the time of shooting, as shown in FIG. A stopper 22 a is formed below the film roll chamber 22. The stopper 22a prevents the photographic film 18 from coming out of the film roll chamber 18 by holding down the end surface of the film roll 18a when the take-up shaft is pulled out from the film roll 18a stored in the film roll chamber 22. .
Further, as shown in FIG. 1, a notch 22c is formed in the inner side wall 22b of the film roll chamber 22. The notch 22c is formed on the inner wall 2 when the film roll 18a is loaded.
2b and the film roll 18a interfere with each other to prevent the film roll 18a from being scratched.

The rear cover 16 is made of opaque plastic, and supports the rear surface of the photographic film 18 with an opening 16a for exposing the winding knob 5 to the outside and a shape (not shown) along the curve of the aperture 20. A film supporting portion is formed. On the bottom surface side of the rear cover 16, a cartridge storage chamber 21 and a film roll chamber 22 are provided.
Pull-top type bottom covers 40 and 41 are provided to cover the bottom surfaces of and. These bottom lids 40, 41 are claw-engaged with the front cover 15, and the bottom lid 40 serves as a take-out lid for taking out the cartridge 17 after photographing.

As shown in FIGS. 3 and 4, the cartridge 1
7 is a case 24a, 24b made of a resin molded product,
A spool 25, which is rotatably housed therein and around which the photo film 18 is wound, and a lid member 26 which shields the inside of the cartridge 17 from light are mainly constituted. In addition to this, a locking device and a display for the lid member, not shown. It is equipped with a device and a bar code plate. The cartridge 17 is configured such that by rotating the spool 25 in the feeding direction of the photographic film 18, the leading end of the photographic film 18 is guided to the film entrance / exit 27 by the separating claw 32 and is fed to the outside of the cartridge 17.

The spool 25 is provided with a pair of cup-shaped flanges 29. The flanges 29 regulate the outer periphery of the photographic film 18 to prevent loosening of the film in the cartridge 17. As a result, when the spool 25 is rotated counterclockwise in the drawing, the rotation can be transmitted to the photographic film 18 without waste and the spool 2
The photo film 18 can be sent out from the film entrance 27 by the rotation of 5. Further, key holes 30 are formed at both shaft ends of the spool 25, and the key holes 30 are exposed to the outside from both side surfaces of the cartridge 17.

The lid member 26 is rotatably incorporated in a film entrance 27 formed at the joint between the cases 24a and 24b. Key holes 31 for rotating the lid member 26 from the outside of the cartridge 17 are formed at both ends of the lid member 26, and are exposed to the outside from both side surfaces of the cartridge 17. As shown in FIG. 4, the lid member 26 has an open position in which the film entrance / exit 27 is opened, and FIG.
As shown in FIG. 7, the film entrance / exit 27 is displaced between the closed position and the light-tight closed position.

A winding knob 5 and a rotating mechanism for the lid member 26 are incorporated in the upper part of the cartridge storage chamber 21, and the key shafts 5a and 34 are projected from the upper surface 21a. When the cartridge 17 is stored in the cartridge storage chamber 21, the key hole 30 of the spool 25 and the key hole 31 of the lid member 26 are engaged with the key shafts 5 a and 34. The winding knob 5 is rotated clockwise in FIG. 3 for each photographing, and the spool 25 is rotated by this rotation operation.
Is rotated to wind up the exposed photographic film 18 in the cartridge 17. In addition, the key shaft 34 normally holds the lid member 26 in the open position, and when the cartridge 17 is taken out of the cartridge storage chamber 21 after the lens-fitted photo film unit 2 is used, the key shaft 34 is rotated to the closed position. To move. The key shaft 34 may be rotated when the photo film 18 is completely stored in the cartridge 17.

As shown in FIG. 6, the film loading line is provided with a unit body supply station 45, a film loading / rear cover loading station 46, and a product unloading station 47 corresponding to the feeding position of the transport belt 44. There is. The film loading and rear cover mounting station 46 is installed in a dark room 48.

At the unit main body supply station 45,
The exposure unit 35, the strobe unit 36, and the like are assembled in another assembly line, and the main body base 13 to which the front cover 15 is assembled from the front side is placed on the pallet 49 with the front side facing downward and supplied to the transport belt 44. It The pallet 49 is provided with holding frames 50 and 51 (see FIG. 7) for positioning the main body base 13.

As shown in FIGS. 1 and 7, the film loading / rear cover mounting station 46 serves as a film loading device and has a cartridge holding portion 53 for holding the cartridge 17 and a unit main body 3 rather than the cartridge holding portion 53. The winding shaft 54 disposed on the back side, that is, on the upper side,
A guide 55 for guiding the photographic film 18 is also installed. The cartridge holder 53 is used for the cartridge 17
Is held by air suction. And a position for receiving the photo film cartridge 14 supplied in the darkroom 48,
An air cylinder or the like is movable between the position where the cartridge 17 is inserted into the cartridge storage chamber 21. Although not shown, a key shaft that rotates by engaging with the key hole 30 of the spool 25 is provided in the cartridge holding portion 53, and the photo film 18 is sent out from the film entrance / exit 27 by the rotation of the spool 25. It should be noted that FIG. 1 shows the cartridge holder 5 in order to avoid complication of the drawing.
The description of 3 is omitted.

A slit 54a for sandwiching the tip of the photographic film 18 is formed at the tip of the take-up shaft 54, and the slit 54a is rotated while the tip of the photographic film 18 is sandwiched so as to photograph the outer periphery. The film 18 is wound up to form a film roll 18a. The slit 54a is formed off the center of the winding shaft 54, and the entrance portion into which the photographic film 18 is inserted has an arc shape so that the photographic film 18 is not folded. The diameter D of the winding shaft 54 is 11
Since it is less than or equal to mm, the inner diameter of the film roll 18a wound around the winding shaft 54 is naturally 1 as well.
The outer diameter of the film roll 18a is smaller than 1 mm, and the outer diameter of the film roll 18a is smaller than the inner diameter of the film roll chamber 22. Then, the film roll 18a before being unwound
A gap W is created between the inner wall of the film roll chamber 22 and the inner wall of the film roll chamber 22.

The take-up shaft 54 is located at a position where the photographic film 18 fed from the patrone 17 supplied to the patrone holding portion 53 is taken up to form a film roll 18a, and the patrone holding portion 53 is in the patrone 1
An air cylinder or the like is movable between the position at which 7 is inserted and the position at which it is inserted.

The winding shaft 54 is rotatable around the vicinity of the guide 55, and the rotation allows the film roll 18a to be housed in the film roll chamber 22. Further, the position after the rotation is the winding shaft 5
4 is also the position where the photographic film 18 is supplied, and the take-up shaft 54 receives the photographic film 18 at the same height as the film entrance 27 of the film cartridge 17 to form the film roll 18a, and then the vicinity of the guide 55. Is rotated about and is arranged above the cartridge 17.

The winding shaft 54 accommodates the film roll 18a in the film roll chamber 22, and after the rear cover 16 is attached to the back side of the main body base 13, the winding shaft 54 is opposite to the photographic film winding direction in the figure. Rotate clockwise a few times,
Further, it is controlled so as to be withdrawn from the film roll chamber 22 after the driving force from a motor or the like for rotating the winding shaft 54 is released. As a result, the film roll 18a in the film roll chamber 22 can be reliably wound and loosened.

The guide 55 is arranged in the vicinity of the film entrance / exit 27 of the patrone 17, and the photographic film 1
It has a rod shape with a smooth surface so that it does not get scratched even if it comes into contact with 8. The guide 55, like the cartridge holding portion 53, is movable by an air cylinder or the like between a position for receiving the cartridge 17 and a position for approaching the unit body 3. A rubber roller or the like may be used as the guide 55.

The mounting of the rear cover 16 on the main body base 13 is as follows.
A rear cover mounting arm (not shown) is actuated to cover the rear cover 16 supplied from another line on the main body base portion 13 and press the rear cover 16. Then, the engaging claws provided at the respective portions of the main body base 13 and the rear cover 16 engage with each other, and the rear cover 16 is locked to the main body base 13. Further, after the winding shaft 54 is pulled out from the film roll chamber 22, the bottom lid closing arm (not shown) closes the bottom lids 40 and 41. As a result, the assembly of the unit main body 3 is completed, and thereafter, the inside of the main body base 13 is light-tightly shielded. Then, the conveyor belt 44 is driven and the pallet 49 is moved from the dark room 48 to the position of the product take-out station 47 in the bright room.

The product unloading station 47 is provided with a product unloading arm and a pallet unloading arm (not shown). First, the product take-out arm operates to take out the unit body 3 from the pallet 49. After that, the pallet removing arm is actuated to move the pallet 4 from the conveyor belt 44.
Remove 9. These unit body 3 and pallet 49
Are placed on other conveyor belts and are moved to predetermined places.

The operation of the film loading line thus constructed will be described. The exposure unit 35 and the strobe unit 36 are assembled in another assembly line, and the main body base 13 with the front cover 15 assembled is placed on the pallet 49 and positioned by the holding frames 50 and 51. Then, it is supplied to the conveyor belt 44 at the unit main body supply station 45. After this, the conveyor belt 44
Is driven, and the pallet 49 is conveyed to the film loading and rear cover mounting station 46 in the dark room 48.

At the film loading and rear cover mounting station 46, the cartridge holder 5 is set at the cartridge receiving position.
3 is supplied with a photographic film cartridge 14. Then, a lid member opening mechanism (not shown) opens the lid member 26, and the key shaft of the cartridge holding portion 53 rotates the spool 25 to send the photographic film 18 out of the cartridge 17. The photographic film 18 sent out is moved to the same height as the film entrance / exit 27, and the winding shaft 54 is moving.
The leading end is locked in the slit 54a of the
The film roll 18a is wound around the outer periphery by rotating counterclockwise in FIG. The inner diameter of the film roll 18a at this time is the same as the outer diameter D of the winding shaft 54.

The winding shaft 54 formed with the film roll 18a rotates clockwise around the vicinity of the guide 55 and moves above the cartridge holder 53. At this time, the photographic film 18 is in contact with the guide 55 and is bent, so that the photographic film 18 is substantially upright with respect to the main body base 13. Further, since the surface of the guide 55 is processed smoothly, the photo film 18 is not scratched or the like.

Next, the cartridge holding portion 53 holding the cartridge 17, the winding shaft 54 holding the film roll 18a, and the guide 55 guiding the photographic film 18 are attached to the main body base 13 by an air cylinder or the like. It is moved linearly toward. This makes the Patrone 17
Is stored in the cartridge storage chamber 21, and the key shaft 5a of the winding knob 5 is inserted into the key hole 30 of the spool 25 and the lid member 26.
The key shaft 34 of the lid member rotating mechanism is engaged with the key hole 31 of the. Since the photographic film 18 is bent and erected by the guide 55, it does not interfere with the aperture 20 of the main body base 13.

After loading the cartridge 17, the winding shaft 54
Rotates around the vicinity of the guide 55 in the counterclockwise direction in FIG. As a result, the film roll 18a is
As shown by the chain double-dashed line in the figure, the film is housed in the film roll chamber 22, and a gap W is formed between the outer diameter of the film roll 18a and the inner diameter of the film roll chamber 22. In addition, during the storage, the winding shaft 5 is pulled from the film entrance 27.
Since the distance to 4 is slightly longer than the distance from the film entrance / exit 27 to the center of the film roll chamber 22,
The film roll 18a and the inner side wall 22b of the film roll chamber 22 come close to each other, but since the inner side wall 22b is provided with a notch 22c, scratches due to rubbing or the like will not occur in the photographic film 18
Does not occur in

After loading the film roll 18a, the cartridge holding portion 53 and the guide 55 are retracted by an air cylinder or the like. Next, the rear cover mounting arm is operated to cover the main body base 13 with the rear cover 16 supplied from another line and press the rear cover 16. Then, the engaging claws provided on the main body base 13 and the rear cover 16 are engaged with each other,
The rear cover 16 is locked to the main body base 13.

After the rear cover 16 is attached, the winding shaft 5
In FIG. 1, the film 4 is rotated several times in the clockwise direction opposite to the photographic film winding direction, the driving force from the motor for rotating the winding shaft 54 is released, and the film roll chamber 22 is rotated.
Pulled from. As a result, the film roll chamber 22
The inner film roll 18a is surely wound up to the full inner wall of the film roll chamber 22 and the gap W is eliminated, and the inner diameter of the film roll 18a becomes 11 mm or more, so that there is no winding tendency.

After the winding shaft 54 is pulled out from the film roll chamber 22, the bottom lid closing arm is operated, and the bottom lids 40 and 41 close the bottom side of the cartridge storage chamber 21 and the film roll chamber 22. . As a result, the assembly of the unit main body 3 is completed, and the inside of the main body base 13 is light-tightly shielded. The completed unit body 3 has a conveyor belt 44.
The dark room 48 to the light room product take-out station 47
Is transported to the position.

At the product unloading station 47, the product unloading arm removes the unit body 3 from the pallet 49, and the pallet unloading arm removes the pallet 49 from the conveyor belt 44. The taken out unit main body 3 is conveyed to the next dry battery loading process for the strobe unit and the inspection process.

In the above embodiment, the film roll 18a is loosened by rotating the take-up shaft 54 in the opposite direction. However, as shown in FIGS. The film side retainer that can be slid into 56
And the take-up shaft 54 is temporarily set to the film roll chamber 22.
After being taken out from the film roll 18, the winding shaft 54 and the film side surface retainer 56 may be advanced toward the film roll chamber 22 to press and loosen the end face of the film roll 18a. According to this winding loosening method, the photographic film 18 inside the film roll 18a that pops out of the film roll chamber 22 by removing the winding shaft 54 can be returned to the inside of the film roll chamber 22.

A film roll unwinding station is provided after the film loading and rear cover mounting station 46, and as shown in FIG. 9, an ultrasonic wave having a low frequency vibration is given by an ultrasonic oscillator 58 and a booster 59. Even if the horn 60 is brought into contact with the unit main body 3 on the pallet 49, the film roll 18a can be wound and loosened. A vibration motor may be used instead of the ultrasonic oscillator 58 and the booster 59.

Further, as shown in FIG.
4 is provided with a vibrating horn 62 slidably contacting the conveyor belt 44, and when the unit main body 3 placed on the pallet 49 moves above the vibrating horn 62, the vibrating motor 63 vibrates the vibrating horn 62 at a low frequency to make the film. The roll 18a may be wound and loosened. Further, the film roll 18a can be wound and loosened even if the unit body 3 is hit with a weak force by a hammer or the like.

Further, the photographic film 18 is bent so as to be in contact with the guide 55 so as to avoid the aperture 20, but the photographic film 18 is not in use of the guide 55 and is brought into contact with the upper and lower sides of the film entrance / exit 27 and bent. May be.

[0052]

As described above, according to the method of manufacturing the lens-fitted film unit of the present invention, the photographic film is bent in the vicinity of the entrance and exit of the film, and the film roll is arranged at a position farther from the rear side of the unit body than the cartridge. Since the photographic film is loaded in such a state that it does not interfere with the aperture, the photographic film is not scratched or the like.

Further, since the photographic film is wound by a winding shaft having an outer diameter of 11 mm or less to form a film roll,
The outer shape of the film roll becomes smaller, and the film roll chamber can be made smaller. In addition, the loaded film roll may rotate in the direction opposite to the film winding direction of the winding shaft, press the end of the film roll on the winding shaft, hit with a hammer, etc. Since a mechanical shock such as sonic vibration is applied, the film roll can be surely wound and loosened in the film roll chamber, and the inner diameter becomes 11 mm or more, so that there is no curling habit. Further, the photographic film which is hard to be rolled is supplied, and it is not necessary to change the equipment even if the film roll chamber is made smaller.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a unit main body when a photographic film cartridge is loaded.

FIG. 2 is a perspective view showing the outer appearance of a lens-fitted film unit.

FIG. 3 is an exploded perspective view showing a configuration of a unit main body.

FIG. 4 is a cross-sectional view of essential parts of the cartridge in a state where the lid member is in the open position.

FIG. 5 is a cross-sectional view of essential parts of the cartridge in a state where the lid member is in the closed position.

FIG. 6 is a schematic view showing the structure of a film loading line.

FIG. 7 is a perspective view showing a configuration of a film loading and rear cover loading station.

FIG. 8 is a cross-sectional view of a main part of a unit body showing a method for loosening a film roll according to another embodiment.

FIG. 9 is a schematic view showing a method of loosening a film roll according to still another embodiment.

FIG. 10 is a schematic view showing a method of loosening a film roll according to still another embodiment.

[Explanation of symbols]

2 Film unit with lens 3 unit body 13 body base 14 Photo film Patrone 16 Rear cover 17 Patrone 18 Photo Film 18a film roll 20 aperture 21 Patrone storage room 22 film roll room 25 spools 26 Lid member 27 Film doorway 53 Patrone holder 54 winding shaft 55 Guide 56 film side restraint

Front page continuation (51) Int.Cl. ⁷ identification code FI G03B 17/04 G03B 17/04 17/30 17/30 (58) Fields investigated (Int.Cl. ⁷ , DB name) G03C 3/00 555 G03C 3/00 575 G03C 3/00 590 G03B 17/00 G03B 17/04 G03B 17/30

Claims (6)

(57) [Claims] 1. A main body base provided with a cartridge storage chamber for storing a cartridge, a film roll chamber for storing a film roll which is a roll of a photographic film drawn from the cartridge, and a rear side of the main body. In the method of manufacturing a film unit with a lens, which is assembled into a cartridge and has a rear cover that covers the inside of the film roll and the film roll in a light-tight manner, the film roll is formed by winding the photographic film around a winding shaft having an outer diameter of 11 mm or less. The lens is characterized in that the inner diameter of the roll is set to 11 mm or more by unwinding the take-up shaft from the film roll chamber after the rear cover is assembled, and then unwinding the roll of the photo film. A method for manufacturing a film unit. 2. The winding shaft is for winding a photographic film.
Method of manufacturing a film unit according to claim 1, wherein the drawn off from the film roll chamber after the driving force is released by a predetermined amount of rotation in the opposite direction. Wherein said winding shaft, the manufacturing method of the lens-fitted photo film unit of claim 1, wherein letting loosened winding presses the end face of the photo film roll after being withdrawn from the film roll chamber. 4. After removal of the winding shaft, mechanically manufacturing method of the lens-fitted photo film unit according to claim 1, wherein by applying an impact, characterized in that cause loosening up the photo film roll. 5. The method of manufacturing a lens-fitted film unit according to claim 4 , wherein the impact is hit by a hammer or the like. 6. The method for manufacturing a lens-fitted film unit according to claim 4 , wherein the impact is vibration of low-frequency ultrasonic waves or the like.