JPH10228079A - Instant film pack and camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instant film pack and a camera where the loading operation of a film unit is simply and quickly performed by making waste compact and whose cost is low. SOLUTION: Plural film units 30 are stacked and housed in a light-shielded bag 12 at a film pack 2. The light-shielded bag 12 is disassembled into one sheet member 12a by pulling one end part in one direction. Adhesive materials 39a and 39c attains adhesive power only at the time of mutually contacting are provided at specified points on the side of an end part 35a mutually opposed at the time of taking up the sheet member 12a to be rolled up by locking one end part at a take-up shaft 3. A pressing member 73 positioned on the upper side of the take-up shaft 3 and pressing at least the outer peripheral surface of the sheet member 12a of a final take-up stage when the film pack 2 is housed a film loading chamber is provided on the side of the camera. When an entire sheet member 12a is taken up to be rolled up by rotating the take-up shaft 3, the adhesive materials 39a and 39c mutually contact and the end part 35a adherent to and is fixed on the peripheral surface of the sheet member 12a, so that the sheet member 12a is recovered as it is in a compact roll-like state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant film pack and a camera, and more particularly to an instant film pack and a camera which can easily and quickly load a self-developing type film unit.

[0002]

2. Description of the Related Art There is known an instant film pack (hereinafter, referred to as a film pack) which is used by being loaded into an instant camera. As described in, for example, JP-A-7-209814, this film pack is a rectangular mono-sheet type self-developing processing type in a box-shaped hard plastic light-shielding container (hard case). A plurality of film units (hereinafter, referred to as film units) are stacked and stored. This film unit captures and cures a developing solution pod in which a developing solution is sealed at one opposite edge of a photosensitive sheet having a photosensitive layer and an image receiving layer, and an excess developing solution at the other edge. It is provided with a trap portion and can be handled as one sheet until the end.

The hard case is formed with an exposure opening and a discharge opening for discharging the exposed film unit. Inside the hard case, a hard plastic thin film for shielding the exposure opening from light is provided. A plate-shaped light-shielding cover is stored so as to overlap the exposure surface of the uppermost film unit, and a spring member for pressing the film unit toward the exposure opening side is stored between the lowermost film unit and the inner wall surface. . In this way, despite the fact that the hard case of the film pack uses a large amount of resin and metal and has a complicated structure and high cost, after shooting all the built-in film units, it is discarded as garbage. Therefore, there are problems in terms of cost, resource protection, environmental protection, and the like.

On the other hand, JP-A-3-89338 discloses that
An opening for taking out a film sheet is provided on a side of a flexible bag containing a plurality of laminated X-ray film sheets, and the opening is sealed with a light-shielding cover. ing. This package is once loaded in a magazine and then mounted on an X-ray apparatus. The tip of the light-shielding cover is wrapped around a spindle in the magazine, and when the magazine is loaded into the X-ray apparatus, the spindle is driven to peel off the light-shielding cover from the flexible bag, exposing the opening. . Next, after the film sheet is pulled out through the opening by the suction device or the finger provided in the X-ray apparatus, the film sheet is transferred to a predetermined position in the apparatus by the film driving roller.

Japanese Patent Laid-Open Publication No. 8-62782 discloses that
A package is described in which a plurality of laminated film sheets are partially surrounded by a U-shaped protective carrier, and the protective carrier and the film sheet are wrapped in a flexible light shielding package. When this film pack is loaded into the printer, one end of the film pack is cut off, and the other end is grasped and removed by a roller, so that the protective carrier and the film sheet remain in the printer. You.

[0006]

A film pack using the above-mentioned film unit instead of the film sheet in the package or package described in the above publication is conceivable, but has the following problems. The package described in Japanese Patent Application Laid-Open No. 3-89338 is advantageous in that the cost is low and the amount of waste is small as compared with the film pack using the hard case. However, once the magazine is loaded into the magazine, It takes a lot of time and trouble to mount the film unit on the apparatus, and it is difficult to load the film unit simply and quickly.

A package as described in Japanese Patent Application Laid-Open No. 8-62782 is lower in cost and less waste than a film pack using the hard case.
Further, it is more advantageous than the film pack described in JP-A-3-89338 in that no magazine is used. However, when a new film unit is loaded, it is necessary to take out a relatively large protective carrier, and an extremely large force is required to pull out the light shielding package with a roller. This is disadvantageous in that a motor and the like are required, the size of the camera increases, and the cost of the camera increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low-cost instant film pack in which waste can be made compact and the film unit can be easily and quickly loaded, and a camera using the same.

[0009]

In order to achieve the above object, an instant film pack according to the present invention comprises a plurality of self-developing type film units which are stacked and light-tightly housed in a light-shielding bag. In the pack, the light-shielding bag is formed of one band-shaped sheet member formed in a bag shape so as to be disassembled by pulling one end portion in one direction, and winding the one end portion of the sheet member in a predetermined shape. Adhesives that exert an adhesive force only when they come into contact with each other are provided at predetermined positions on the other end side of the sheet members that face each other when the sheet members are wound into a roll while being locked to a shaft. It is.

In an instant film pack in which a plurality of self-developing type film units are stacked and light-tightly housed in a light-shielding bag, the light-shielding bag is disassembled by pulling one end in one direction. A sheet formed of a single band-shaped sheet member formed in a bag shape as described above, and the one end portion of the sheet member is locked to a predetermined winding shaft and rolled into a roll shape when rolled up. An arcuate plate member having elasticity which is hooked on the peripheral surface of the member to prevent the sheet member from being loosened is fixed to the other end of the sheet member.

In the camera according to the present invention, a light-shielding bag for stacking a plurality of self-developing film units in a light-tight manner is disassembled into one band-like sheet member by pulling one end in one direction. Formed at the other end of the sheet member facing each other when the sheet member is wound into a roll by locking the one end of the sheet member to a predetermined winding shaft. In a camera using an instant film pack provided with an adhesive that exerts an adhesive force only when it comes into contact, after storing the instant film pack in a film loading chamber, a winding shaft on which one end of a sheet member is locked is used. Rotation driving means for rotating and winding the sheet member into a roll shape; and a pressing member provided near the winding shaft and pressing at least the outer peripheral surface of the sheet member at the end of winding. The provided, in which so as to be bonded and fixed to the circumferential surface of the sheet member by the other end portion of the sheet when the all of the sheet member wound the adhesive.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a film pack storage and packaging body 1 using a film pack according to an embodiment of the present invention has a film pack 2 and a round rod-shaped winding shaft 3.
And a paper box member 5 for accommodating the film pack 2 and the winding shaft 3. The lower portion of the box member 5 is an opening 6 which is closed by a paper lid member 7. At the top of the box member 5, a tab 8 having a hole 8a used when hanging it on a store front or the like is provided.

As shown in FIGS. 1 and 3, in the center of the winding shaft 3, a slit into which one end of a sheet member 12a forming a light shielding bag 12 of the film pack 2 is inserted and locked. 3a are formed. Further, a gear 10 meshed with a gear of a developing roller of a camera described later is fixed to one end of the winding shaft 3. The diameter of the winding shaft 3 is, for example, 6 mm.

As shown in FIG. 3, the box member 5 has a space 13 in which the film pack 2 is stored substantially at the center and a space 13 for storing the winding shaft 3 between the film pack 2 and the innermost inner wall surface 5a. The size of the film pack 2 is larger than that of the film pack 2 so that spaces 14 and 15 are formed between the wall surfaces 5b and 5c to receive a support member (described later) of the winding shaft 3.

At both corners of the box member 5 on the inner wall surface 5a side, both ends 3b, 3c of the winding shaft 3 are brought into contact with each other to hold and fix the winding shaft 3 in the space 13. 17
Is fixed. In addition, the shaft holding members 16 and 17
For example, a strip of thick paper is curved in an arc shape to give elasticity. On the inner wall surface 5a, rectangular elastic members 18 and 19 formed of, for example, styrene foam or sponge are fixed, and the winding shaft 3 and the inner wall surface 5a are fixed.
Are separated by a predetermined distance. The elastic member 20
Reference numerals a and 20b denote a space between the winding shaft 3 and the film pack 2, and a film loading chamber 51 of a camera described later.
So that the wall can be inserted. The elastic members 18, 1
9, 20, and 20b are sufficiently soft and absorb the pushing force of the upper part of the box member 5 during loading, which will be described later, so that the pushing force is not transmitted to the film pack 2.

The spaces 14 and 15 are provided with holding members 21 for positioning the film pack 2 at the center of the box member 5.
22 (see FIG. 4). These holding members 21 and 22 are formed by folding a strip of thick paper at a right angle.
When it is inserted into the support member, it is pushed down by the tip of the support member and falls down.

A rectangular elastic member 24 made of, for example, styrofoam or the like is attached to the center of the inside of the lid member 7. When the opening 6 of the box member 5 is closed by the lid member 7, the film pack 2 is closed. To support the lower part. Since the film pack 2 is positioned by the pressing members 21 and 22, the elastic members 18 and
19, 20a, 20b and 24 can be omitted.

The film pack 2 is, as shown in FIG.
A light-shielding bag 12 and a plurality of sheets stacked and stored therein;
For example, it comprises ten film units 30. The film unit 30 is of a self-developing type, and, as is well known, a photosensitive sheet 31 provided with a photosensitive layer and an image receiving layer, a developing solution pod 32 containing a developing solution, and an excess developing solution. The trap unit 33 to be cured is unitized, and is a rectangular mono-sheet type that can be handled as one sheet until the end.

As shown in FIG. 6, the light-shielding bag 2 has a length D ₁ (about 416 mm) in the longitudinal direction which is about 4.3 times the length D ₂ (about 96 mm) of the film unit 30. It is formed from a sheet member 12a having the following configuration. The sheet member 12a includes a substantially rectangular wrapping portion 35 that wraps the ten stacked film units 30 in two, and a tongue piece portion 36 provided by extending one end portion in the longitudinal direction. I have. For the sheet member 12a, for example, a polyethylene terephthalate (PET) having a thickness of 16 μm is laminated on a polyethylene sheet (PE) having a thickness of 40 μm into which carbon black is mixed, and an aluminum vapor-deposited layer having a thickness of 400 ° is provided thereon. For example, a urethane-based weak sealing adhesive is applied to the opposite surface. In addition, after this adhesive is applied and dried, it does not adhere to other things in normal handling and does not absorb dust,
It exerts adhesive strength only when heated and pressed.

The packaging section 35 has a rectangular shape of width D ₃ × length D ₄ , and the width D ₃ is the width D ₃ of the film unit 30.
₅ (about 96 mm), which is slightly larger than about 123 mm, and the length D ₄ is about 220 mm, which is slightly longer than twice the length D ₂ of the film unit 30. The tongue piece 36 is a root part 3 having one end of the packaging part 35 extended by a length D ₆ (10 mm).
6a and the tip end 36b narrowed by an arc-shaped edge of αR.
60mm width D ₇ of (the one end of the sheet member 12a)
And a narrow width portion 36c. Note that α is 100 mm
In this embodiment, it is 160 mm.

FIG. 6 shows the seal portion 3 by hatching the imaginary line.
8a, 38b and 40 are depicted. These seal portions 38
Reference numerals a, 38b, and 40 virtually depict portions that are weakly sealed by being heated and pressed when the light shielding bag 12 is formed. The seal portions 38a and 38b have a width D ₈ (4 m) from each corner chamfered of the end portion 35a to the edges 35b and 35c on both sides of the packaging portion 35 to the corners P and Q of the root portion 36a of the tongue piece portion 36.
m) is a portion that is weakly sealed in a linear shape. Further, the seal portion 40, the corner P, the width D ₃ directions corners P between Q, a width D which is the front end portion 36b side top portion 40a of Q as both ends of the foot
_This is a part that is weakly sealed in a ₉ (2 mm) mountain shape.

The seal portions 38a, 3 of the edges 35b, 35c
8b and the film unit 30 are provided with an adhesive 39.
a, 39b, 39c, and 39d are, for example, rectangular end portions 3
It is applied to each position near 5a and near the center of the packaging unit 35. Then, the adhesives 39a, 39b and the adhesives 39c,
39d is provided separately on the front and back of the sheet member 12a, and is separated from each other when the sheet member 12a is wound around the winding shaft 3 in a roll shape. Thereby, as described later, the sheet member 12a
Is wound up with the visible side of the drawing as the front side, the adhesive 39a and the adhesive 39c are brought into contact with each other, and the adhesive 39b and the adhesive 39d are brought into contact with each other and adhere to each other. After the adhesives 39a to 39d are applied and dried, the adhesives 39a to 39d do not adhere to another object, and have a property of exhibiting an adhesive force only when the adhesives come into contact with each other. A rubber type is preferable, and examples thereof include "Selfa" (trade name) (self-adhesive tape) manufactured by Nippon Rika Paper Co., Ltd. and "Besar" (trade name) manufactured by Nippon Optical Fiber Co., Ltd.

The film unit 30 is formed by the sheet member 12a.
The wrap, first about the fold line 42 of half the length D ₄ of the packaging unit 35 and the sheet member 12a folded in two, to insert the ten film units 30 are stacked in this period.
Next, the tongue piece 36 is wrapped around the film unit 30.
The sealing portion 40 is formed by stacking the sealing portion 40 on the packaging portion 35 and heating and pressurizing the sealing portion 40 from above the sealing portion 40. As shown in FIG. It is bonded to the surface near 35a. As a result, the sheet member 12a becomes cylindrical, and the film unit 30 is wrapped in this cylinder.

Thereafter, the edges 35b, 35c of the openings 44, 45 of the packaging unit 35 near the four corners of the film unit 30.
Are folded into an M-shape when viewed from the open side, and the opposing seal portions 38a, 38
b Comrades are heated and pressurized from the outside in close contact with each other,
The edges 35b and 35c of the packaging part 35 are lightly sealed weakly. Thereafter, the edge portions 35b, 3 which are in the upright state are set.
5c is laid down and weakly sealed.

Next, the tongue piece 36 of the sheet member 12a is folded back from a position slightly closer to the developing solution pod 32 than the top 40a of the sealing portion 40, and the outer side of the developing solution pod 32 is wrapped around the trap portion 33 side. Tongue piece 3
When the front end 36b of the film 6 is projected, the film pack 2 as shown in FIG. 5 is completed.

The film pack 2 is inserted into the box member 5 with the take-up shaft 3 first after the take-up shaft 3 is locked to the tip 36b of the tongue piece 36. At this time, for example, the winding shaft 3 is inserted together with the film pack 2 while holding both ends of the winding shaft 3 with a pair of bar-shaped jigs each having a U-shaped tip. After being sandwiched between the members 16 and 17, the pair of bar-shaped jigs may be pulled out from the spaces 14 and 15. After that, the holding members 21 and 22 which have fallen down by the rod-shaped jig are raised, and both sides of the film pack 2 are positioned by the holding members 21 and 22, and then the opening 6 is closed by the lid member 7. The package 1 is completed. In addition,
A sealing piece or the like is attached to the boundary between the box member 5 and the lid member 7 so that the lid member 7 does not drop accidentally, and is fixed to the box member 5.

As shown in FIGS. 8 and 9, the camera 50 using the film pack storage and packaging body 1 thus configured can be freely inserted into and removed from the film loading chamber 51, and the film pack storage and packaging body 1 is inserted. A spare room 52 is provided. The spare chamber 52 is rotatably mounted around a shaft 54 inside the back cover 53, and is urged in a direction away from the back cover 53 by a spring (not shown) mounted on the shaft portion 54. A long hole 55 of a metal fitting 55 fixed to the back cover 53
The degree of opening is regulated by a stop mechanism using a and a pin 57 fixed to the back plate 56 of the preliminary chamber 52. In addition, a receiving port 52a for receiving the film pack storage and packaging body 1 is formed in the upper part of the preliminary chamber 52, and an opening 52b for exposure is formed in the front surface. An opening 56 a for receiving the pressure plate 61 fixed to the inner wall surface of the back cover 53 is formed at the center of the back plate 56.

As shown in the figure, a pair of elongated plate-like support members 62 and 63 are provided at both inside corners of the preliminary chamber 52. Notches 65 are formed at the respective distal ends of the support members 62 and 63 for capturing the end of the winding shaft 3 and rotatably supporting the same. The notch 65 includes a V-shaped groove 65a and a circular hole 65b formed at the back thereof. When the winding shaft 3 is pushed into the groove 65a, the distal ends of the support members 62 and 63 are deformed so that the winding shaft 3 is inserted into the hole 65b.
Accept up to. Then, after the winding shaft 3 enters the hole 65b, the deformation of each of the distal ends of the support members 62 and 63 returns to the original state, and the winding shaft 3 is captured so as not to be accidentally dropped.

In the upper part of the film loading chamber 51, there is formed a slit-like film discharge port 51a for discharging the photographed film unit 30 from the film loading chamber 51, and the film unit 30 is further sandwiched above this. And a pair of developing rollers 67 and 68 for crushing the developing solution pod 32 and developing the developing solution therein to the photosensitive sheet 31. When the back cover is closed, the winding roller 3
The gear 70 meshed with the gear 10 is provided. Above the developing rollers 67 and 68, a slit-shaped film discharge port 71 for discharging the photographed film unit 30 to the outside is formed.

A guide 72 for guiding the film unit 30 to the film discharge port 71 is disposed above the developing roller 68, and a pair of spring plate-like pressing members 73 are integrally formed with the guide 72.
Is provided. The pair of pressing members 73 are provided at positions opposed to the adhesives 39a to 39d (see FIG. 10), and their respective distal ends are provided on the winding shaft 3 as shown in FIGS. It extends to the vicinity and above. The pressing member 73 presses the outer peripheral surface of the sheet member 12a in the middle of winding (especially at the end), prevents the sheet member 12a wound in a roll from being loosened, and adds the adhesive 39a to the adhesive 39c. However, the adhesive 39b is pressed against the adhesive 39d and adhered to each other.
Each of the distal ends of the holding members 73 is set at a height that does not make contact with the winding shaft 3 when the preliminary chamber 52 is inserted into the film loading chamber 51.

In order to load the film unit 30 into the camera 50 configured as described above, first, the back cover 53 is opened to expose the receiving port 52a of the preliminary chamber 52. Next, when the cover member 7 is removed from the film pack storage and packaging body 1 and the film pack storage and packaging body 1 is inserted into the preliminary chamber 52 from the receiving port 52a with the opening 6 of the box member 5 at the top, the support members 62 and 63 are It is inserted into the spaces 14, 15 beside the film pack in the box member 5. The support members 62 and 63 immediately contact the pressing members 21 and 22, but the pressing members 21 and 22 are pressed by the force for inserting the film pack storage and packaging body 1.
22 is easily laid down so that it can be inserted further.

The film pack storage and packaging body 1 is placed in the preparatory room 52.
When each of the support members 62 and 63 is inserted into the inside, the respective end portions of the support members 62 and 63 come into contact with the respective end portions of the winding shaft 3.
As shown by β, when the upper ends of the box member 5 are pressed substantially vertically, each end of the winding shaft 3 is strongly pressed into the groove 65 a of the notch 65 via the elastic members 18 and 19. As a result, the distal ends of the support members 62 and 63 are elastically deformed,
Each end of the winding shaft 3 is inserted up to the hole 65b. At the next moment, the respective ends of the support members 62 and 63 return to their original shapes, and the respective ends of the winding shaft 3 are rotatably captured by the support members 62 and 63. Thereafter, the tab 8 is pulled to remove the box member 5.
Is pulled up, the film pack 2 remains in the preliminary chamber 52.

Thereafter, when the back cover 53 is closed, as shown in FIG. 8, the gear 10 of the winding shaft 3 meshes with the gear 70 of the developing roller 68 and the winding shaft 3
Enter below. Next, when the shutter button is depressed,
The rotation of the developing roller 68 rotates the winding shaft 3, and the tongue piece 36 is wound around the winding shaft 3. As the tongue piece 36 is wound around the winding shaft 3, first, the pulling force concentrates on the top portion 40 a of the seal portion 40, so that the seal portion 40 starts to be easily peeled off with a slight pulling force. This peeling gradually propagates from the top 40a toward the corners P and Q which are also the skirt end of the seal portion 40,
After the entirety of the seal portion 40 is peeled off, the seal portions 38a and 38b start to be peeled off from the corners P and Q.

While the rotation of the winding shaft 3 proceeds, FIG.
As shown in (2), the outer peripheral surface of the sheet member 12a is pressed by the pressing member 73, and the sheet member 12a is wound in a roll without loosening. Then, the seal portions 38a,
When the light-shielding bag 12 returns to the original single sheet member 12a and all the sheet members 12a are wound around the winding shaft 3, as shown in FIG. 1B and FIG. The adhesive 39a comes into contact with the adhesive 39c, and the adhesive 39b comes into contact with the adhesive 39d. Thereby, the end 35
a is adhesively fixed to the outer peripheral surface of the sheet member 12a, and the sheet member 12a is formed into a compact roll form. Note that the camera 50 can be made compact by setting the diameter of the roll within, for example, at most 15 mm.

When all the sheet members 12a are wound around the winding shaft 3, a change in the rotational resistance applied to the winding shaft 3 is detected, and the rotation of the developing roller 68, ie, the winding shaft 3, is stopped. As a result, the ten film units 30 remain in the pre-chamber 52 in a stacked state, and the film loading is completed. At this time, since the laminated film units 30 are pressed toward the exposure opening 51b of the film loading chamber 51 by the pressure plate 61, the uppermost film unit 30a is set to the exposure position.

When the photographing lens 75 is pointed at the subject and the shutter button is pressed down, photometry is performed, and then the shutter is driven to expose the uppermost film unit 30a through the exposure opening 51b. Immediately after the exposure is completed, the camera 50
The feeding claw incorporated therein operates to engage with the end of the exposed film unit 30a on the trap portion 33 side,
The film unit 30a is connected to the film discharge ports 51a, 71
And the developing rollers 67 and 68
Starts to rotate.

When the developing solution pod 32 side end of the film unit 30a is pushed out from the film discharge port 51a, the developing unit pod 32 is crushed by the developing rollers 67 and 68, and the film unit 30a is pushed out of the film unit 30a. Send it out to 71. While the film unit 30a is being discharged from the film discharge port 71,
The developing solution is uniformly spread on the photosensitive sheet 31 of the film unit 30a by the developing rollers 67 and 68. When a predetermined time has elapsed after the film unit 30a is discharged from the film discharge port 71, the film unit 30a
The positive image of the subject appears on the photosensitive sheet 31 of FIG.

Thereafter, by similarly operating the shutter button, all the film units 30 in the film loading chamber 51 can be sequentially exposed one by one. When the photographing of all the film units 30 is completed and a new film unit 30 is loaded, the take-up shaft 3 around which the sheet member 12a is wound in a roll shape is used.
Since the winding shaft 3 remains at the leading end of the film 63, the take-up shaft 3 is taken out, and a new film pack storage and packaging body 1 is inserted into the spare chamber 52.

When the take-up shaft 3 is taken out, the sheet member 12a is in a very compact roll form without loosening, so that the take-up shaft 3 can be taken out very easily, and the film unit can be quickly loaded. be able to. Further, when the sheet member 12a together with the winding shaft 3 is discarded, no space is required, which is advantageous in terms of environmental protection.

In the above-described embodiment, an adhesive is used to prevent the sheet member from loosening. However, as shown in FIG. 11, a plate member 74 curved in an arc shape may be fixed to the end 35a. The plate member 74 is formed of an elastic resin plate. When all the sheet members 12a are wound around the winding shaft 3, the sheet members 74 are caught on the peripheral surface of the sheet member 12a, and loosen the sheet member 12a. This is to prevent it. A strong adhesive or ultrasonic welding can be used as a means for fixing the plate member 74 and the end 35a.

As the film unit 30, an instant film "ACE" manufactured by Fuji Photo Film Co., Ltd. is used.
(Trade name) or an instant film “Spectra” (trade name) manufactured by Polaroid. Note that "AC
In "E", an image appears on the surface opposite to the exposed surface, and in "Spectra", an image appears on the same side as the exposed surface.

"ACE" type film unit 30
Consists of a photosensitive sheet and a cover sheet. The surface of the photosensitive sheet becomes an exposure surface, and an image appears on the surface of the cover sheet. The photosensitive sheet is provided on a support having a back layer,
An image receiving layer, a white reflective layer, a light-shielding layer, a red-sensitive emulsion layer, a green-sensitive emulsion layer, a blue-sensitive emulsion layer, a UV absorber layer, and a protective layer are provided in this order. A color mixing prevention layer is provided. In the cover sheet, a filter dye layer is provided on a support, a neutralizing layer and a timing layer are sequentially provided below the support dye layer.

The sheet member used in the present invention is required to have a high light-shielding property, a high lubricity and a moderate rigidity.
The light passing from the sheet surface of the sheet member must be at least 0.01 lux / sec or less, for example, 100,000 lux / 100 sec. If you do, 1/10 ⁹
It is necessary to reduce the light below. For this reason, it is preferable that carbon black, aluminum foil, aluminum vapor deposition, or a combination thereof is applied to the sheet member. The addition amount of carbon black is set so as to be 1 g / m ² or more, preferably 1.5 g / m ² or more. The carbon black used is a low sulfur component, for example,
The materials described in 179342 are preferred.

Further, WO (International Publication) 89/1284
According to Japanese Patent Publication No. 7 (1994), carbon usually contains a cyanide compound. It is known that a cyan compound has a chemical effect on a photographic film, and an increase in its content adversely affects photographic properties. The content of the cyan compound which does not cause a problem in photographic performance varies depending on the amount of carbon used, but is generally 3 ppm / carbon weight. The cyan compound content here is determined by the following method.

The carbon is refluxed in the presence of sulfuric acid, and the generated hydrogen cyanide is trapped with a 0.1N aqueous sodium hydroxide solution, and then quantified by 4-pyridinecarboxylic acid / pyrazolone absorption spectrometry. Thereafter, this amount of hydrogen cyanide is converted into ppm units based on the weight of carbon.

The cyanide content of carbon is DBP
(Dibutyl peroxide) Very correlated with oil absorption. DBP
In the case of carbon having an oil absorption of less than 65 ml / 100 g, the cyan compound content is in a dangerous area for photographic performance. There is also a strong correlation between the amounts of ash contained in the carbon. The ash content is 0.5% or more, and the cyan compound content falls within the dangerous range for photographic performance.

Therefore, the carbon used in the present invention is:
Carbon having a DBP oil absorption of 65 ml / 100 g or more, or 0.5% or less if defined by the ash content, and carbon having a cyanide content of 2 ppm or less in the above-described measurement method is preferable.

The polymer used for the sheet member is polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA),
Polycarbonate (PC), polystyrene (PS), polyphenylene oxide (PPO) and the like are listed, and they are complex in terms of rigidity, adhesive adhesion, carbon black dispersibility, ease of lamination, ease of vapor deposition layer, etc. used.

A point to be noted in the light-shielding property is a pinhole-shaped light leakage phenomenon. This is because light fog occurs when unevenness in the thickness of the light-shielding layer or the vapor deposition layer and repelling phenomenon occur. In addition, when the film unit is wrapped in a bag with a sheet member, if there is poor bonding of the sealing surface, light may enter the sealing surface, so care must be taken in sealing conditions and coating uniformity of the bonding surface. Must.

To impart lubricity to the sheet member, there are a method of adding it to the outermost layer of the sheet member and a method of coating.
Lubricants include silicone oils, higher fatty acid amides such as oleic acid amide, metal salts of higher fatty acids such as zinc stearate, higher alcohol esters, fatty acid esters of polyhydric alcohol esters, and acrylic fine particle mats. And a method of applying a silica-based matting agent to the surface layer.

The lower the rigidity, the lower the resistance to pull out. However, the material tends to be easily torn, and if the torn material partially remains in the camera, it will be reflected in the photographing and pose a problem. Further, if the rigidity is large, the resistance becomes excessive when the wire is pulled out. Materials with low stiffness can be classified into PE, PA, and materials with high stiffness, such as PET, PC, and PS. By combining these and adjusting the thickness,
Optimal rigidity can be secured.

Providing moisture resistance is effective in protecting the film. The surface transmittance of water is 40 ° C. 9
It is preferable that the material be 5 mg / 24 hr · 1 m ² or less in an atmosphere of 0%. However, if the moisture-proof property of the weakly sealed portion cannot be ensured, the use of an external packaging material further increases the moisture-proof property. Can be secured. In this case, it is not necessary to ensure the moisture resistance of the sheet member. Aluminum foil, aluminum evaporation, ceramic evaporation and the like can be used to ensure moisture proofness.

After wrapping the film unit, the film surface and the sheet member are rubbed and pulled out. Therefore, the lower the air resistance of the film surface, the less the occurrence of static fog. There is a method of kneading or coating an antistatic agent or carbon black on at least the outermost layer on the side (inside) of the sheet member that wraps the film unit.

The above-mentioned weak seal means that two sheet members are
After bonding with an area of 0 mm × 5 mm, one sheet member is fixed and the other sheet member is pulled in the horizontal direction and in the longitudinal direction of the bonding area, and the two sheet members are 5 mm apart from each other.
The adhesive has a maximum tensile strength of 700 g or less, preferably 100 g or more and 500 g or less when peeled.

As the adhesive, a thermoplastic adhesive is used. For example, as a vinyl-based resin, polyvinyl acetate, polyacrylate, as a polycondensation-based resin, polyamide, polyester, and as a polyaddition-based resin, thermoplastic polyurethane, polyvinyl alcohol, and the like can be given.
These may be used in combination.

In order to provide a weak sealing property, the coating amount of the adhesive is reduced, and the molecular weight and other resins (for example, filler, plasticizer,
It is effective to reduce the cohesion by adding a thickener. Alternatively, the sealing surface of the sheet member may be treated with a material that is difficult to adhere (for example, silicone, a fluorine-based material, or the like) to reduce the adhesive strength at the interface.

In the embodiment described above, the adhesive for weak sealing is applied to the entire surface of one side of the sheet member. However, the adhesive may be applied only to the portion to be actually sealed.

[0058]

As described above in detail, according to the film pack of the present invention, one band-shaped sheet is formed by pulling one end of a light-shielding bag for storing a plurality of film units in one direction. An adhesive that is formed so as to be disassembled into a member, and that exerts an adhesive force only when it comes into contact with a predetermined portion on the other end side of the sheet member facing each other when the sheet member is wound into a roll shape Was established,
The rolled-up sheet member can be taken out while maintaining a compact roll form, and the loading operation of the film unit can be performed extremely easily and quickly. In addition, the volume discarded as garbage is reduced, and the environment is protected. Can also contribute.

Further, a light-shielding bag for accommodating a plurality of stacked film units is formed so as to be disassembled into one band-shaped sheet member by pulling one end in one direction.
When the sheet member is wound up in a roll shape, an arc-shaped plate member having elasticity that is caught on the peripheral surface of the sheet member and prevents loosening of the sheet member is fixed to the other end portion of the sheet member. Effect can be obtained,
Since the other end of the sheet member is not bonded with the adhesive, there is also an effect that the sheet member can be easily reused.

Further, according to the camera of the present invention, the sheet member is wound up in a roll shape, and at least the outer peripheral surface of the sheet member at the end of winding is pressed, and when all the sheet members are wound up, the sheet member is wound. Adhesives provided on the other end side come into contact with each other so that the other end of the sheet member is adhered to the peripheral surface of the sheet member, so that the sheet member can be formed into a compact roll without looseness, The sheet member can be easily taken out, and the loading operation of the film unit can be extremely easily and quickly performed. In addition, since a simple configuration including only the rotation driving means for rotating the winding shaft and the pressing member for pressing the outer peripheral surface of the sheet member is sufficient, it is possible to contribute to downsizing and low cost of the camera.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a relationship between a winding shaft, a sheet member, and a pressing member according to the present invention.

FIG. 2 is a perspective view showing the appearance of a film pack storage package.

FIG. 3 is a sectional view showing the internal structure of the film pack storage package.

FIG. 4 is a plan view of the inside of the film pack storage package viewed from the opening side.

FIG. 5 is a perspective view showing the appearance of the film pack.

FIG. 6 is a development view of a light shielding bag.

FIG. 7 is a perspective view showing a cylindrical packaging portion.

FIG. 8 is an explanatory diagram illustrating a state immediately after a camera back cover is closed.

FIG. 9 is an explanatory view showing a structure of a film pack storage package and a spare room.

FIG. 10 is a perspective view showing a state in which all sheet members are wound around a winding shaft.

FIG. 11 is a perspective view showing another means for preventing winding loosening.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 film pack storage package 2 film pack 3 take-up shaft 5 box member 7 lid member 10 gear 12 light shielding bag 12a sheet member 21, 22, 73 pressing member 30 film unit 35 packaging portion 35a end 35b, 35c edge 36 tongue One part 36b Tip part 38a, 38b, 40 Seal part 39a-39d Adhesive 50 Camera 51 Film loading chamber 52 Preparatory chamber 74 Plate member

Continued on the front page (51) Int.Cl. ⁶ Identification code FI G03B 17/52 G03B 17/52 F

Claims (3)

[Claims] 1. An instant film pack in which a plurality of self-developing film units are stacked and light-tightly housed in a light-shielding bag, wherein the light-shielding bag is disassembled by pulling one end in one direction. A single band-shaped sheet member formed in a bag shape as described above, and the one end portion of the sheet member is locked to a predetermined winding shaft and faces each other when the sheet member is wound into a roll. An instant film pack characterized in that an adhesive which exerts an adhesive force only when it comes into contact with each other is provided at a predetermined position on the other end of the sheet member. 2. In an instant film pack in which a plurality of self-developing film units are stacked and light-tightly housed in a light-shielding bag, the light-shielding bag is disassembled by pulling one end in one direction. A sheet formed of a single band-shaped sheet member formed in a bag shape as described above, and the one end portion of the sheet member is locked to a predetermined winding shaft and rolled into a roll shape when rolled up. An instant film pack, wherein an arcuate plate member having elasticity for preventing the sheet member from being loosened by being caught on a peripheral surface of the member is fixed to the other end of the sheet member. 3. A light-shielding bag for stacking a plurality of self-developing type film units in a light-tight manner is formed so as to be disassembled into one strip-shaped sheet member by pulling one end in one direction. At a predetermined location on the other end side of the sheet member facing each other when the one end of the sheet member is locked to a predetermined winding shaft and the sheet member is wound in a roll shape,
In a camera using an instant film pack provided with an adhesive that exerts an adhesive force only when they come into contact with each other, after the instant film pack is stored in a film loading chamber, a winding shaft on which one end of a sheet member is locked. A rotation driving means for rotating the sheet member into a roll by rotating the sheet member, and a pressing member provided near the winding shaft and pressing at least the outer peripheral surface of the sheet member at the end of winding, and all the sheet members are provided. A camera wherein the other end of the sheet member is adhered and fixed to a peripheral surface of the sheet member by the adhesive when the sheet member is wound.