JP2001330927A - Instant film pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strengthen the fitting of a pack body which houses instant film unit of a peel-apart type. SOLUTION: An upper case 30, bottom cap 31 and film pressure plate 32 constituting the pack body are respectively composed of plastic molded gods. Ribs 37 are formed on the both flanks of the upper case 30 and are fitted into fitting grooves 55 of side plate parts 47 formed at both ends of the bottom cap 32. The top surfaces 37a of the ribs 37 are formed to slopes to make the width of the ribs 37 wider gradually toward the front end side from the flanks 30a of the upper case 30. Under surfaces 50a of projecting parts 50 constituting the side plate parts 47 are also formed as slopes to make the width of the fitting grooves 55 gradually wider toward the deep side in compliance with the top surfaces 37a of the ribs 37. The flanks 30a are smaller in the lower draft angle A than the upper draft angle B and therefore the areas of the top surfaces 37a of the ribs 37 are wider.

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 containing a peel apartment type instant film unit.

[0002]

2. Description of the Related Art Self-developing type instant film units include a mono-sheet type and a peel apartment type. A peel apartment type instant film unit (hereinafter, simply referred to as a film unit) stores a photosensitive sheet and an image receiving sheet separately in a pack body as described in Japanese Patent Publication No. 6-87155. ing. A plurality of such film units (for example, 10) are stacked and stored in a pack body, and are commercially available as an instant film pack (hereinafter, referred to as a film pack).

A conventional pack body used for storing a peel apartment type film unit is as follows.
A plastic upper case constituting the upper surface of a box-shaped case body having a substantially rectangular parallelepiped shape, a metal plate bottom cover covering the bottom opening of the upper case and constituting a bottom surface of the case body, an upper case and a bottom cover And a film pressure plate made of a metal plate housed between them, and an exposure opening is formed in the upper case. The lower edge of the front wall of the upper case is higher than the lower edge of the rear wall or both side walls.When the bottom lid is attached to cover the bottom opening of the upper case, the film unit Outlet is formed.

[0004] The film pack configured as above is
It is used by being loaded into a pack holder provided with a pair of developing rollers. When the film pack is loaded in the pack holder, one end of the light shielding sheet protrudes from the drawer opening. The other end of the light-shielding sheet is fixed to the film pressure plate together with the film unit by a staple, and when one end protruding from the drawer port is picked up and pulled out, the other end is cut off from the cut or perforation provided at the stapled location. And is taken out as a series of sheets through the outlet. As a result, the first photosensitive sheet appears at the exposure opening, and the photographing preparation is completed. The other end of the tab having one end adhered to the drawer sheet of the first film unit is lightly adhered to the leading end side of the light-shielding sheet. When the light-shielding sheet is taken out, the other end of the tab projects from the drawer port.

When the exposed film unit is pulled out, the tab joined to the leading end side of the drawer sheet is first drawn out from the tab pullout opening of the pack holder. As a result, the leading end of the drawer sheet enters between the developing rollers. When the tab is further pulled, the leading end of the drawer sheet passes between the developing rollers and projects outside the pack holder, and the tab is peeled off from the leading end side of the drawer sheet. Thereafter, by grasping the leading end of the drawer sheet and pulling it out, the photosensitive sheet and the image receiving sheet joined to the drawer sheet overlap with each other and pass through the developing roller. After the film unit is completely pulled out from between the developing rollers and a predetermined developing and fixing time has passed, a positive image appears on the image receiving sheet, and a print photograph can be obtained by peeling off only the image receiving sheet from the film unit.

In the above-described pack body, since the upper case is made of plastic and different materials are used, such as the bottom lid and the film pressure plate being made of metal plate, the used pack body is discarded. In doing so, there was a problem that the user had to separate each material. Therefore, in the film pack proposed in Japanese Patent Application No. 11-193972, the upper case, the bottom cover, and the film pressure plate are all made of a plastic molded product, so that they can be discarded after use.

[0007]

However, when the bottom cover and the film pressure plate, which were conventionally made of a metal plate, are made of plastic, a strength equivalent to that of a conventional metal part can be obtained unless the thickness is increased. Can not. If the bottom lid and the film pressure plate are formed to be thin, the strength of the pack body will decrease,
The bottom lid may be easily detached. When the bottom cover is removed, external light enters through the bottom opening of the upper case, and the film unit is exposed and cannot be used.

If the thickness of the plastic molded article is increased without changing the internal dimensions of the pack body, the outer shape of the pack body becomes large, so that the pack body interferes with the pack holder and cannot be loaded. Furthermore, if the space of the fitting portion between the upper case and the bottom lid is reduced to suppress the enlargement of the outer shape of the pack body, the fitting between the upper case and the bottom lid is weakened, and the bottom cover is also weakened. Is likely to come off.

The present invention has been made in consideration of the above circumstances, and increases the strength without increasing the outer shape of a pack body formed of a plastic molded product, and removes a bottom cover attached to an upper case. It is an object of the present invention to provide an instant film pack in which the problem is prevented.

[0010]

In order to achieve the above object, an instant film pack according to the present invention comprises an upper case having an exposure opening on the upper surface, ribs formed on both sides and an opening at the bottom, and an end portion on both sides. A bottom cover attached to the upper case so as to form a fitting groove slidably fitted with the rib, cover the bottom of the upper case, and form a film unit outlet on the front surface of the upper case; A photosensitive sheet connected to a drawer sheet is disposed on the upper surface side of the film pressure plate, the photosensitive sheet being connected to a drawer sheet having a pack body including a film pressure plate housed between the upper case and the bottom lid. An image receiving sheet connected to the drawer sheet via a connection sheet is disposed on the bottom side of the film pressure plate, and the leading end of the drawer sheet protruding from the discharge port is pulled out. By this, the photosensitive sheet and the image receiving sheet overlap each other to house a peel-apart type instant film unit that is drawn out from the discharge port, and the upper case, the bottom cover, and the film pressure plate are each formed of a plastic molded product, and the rib is formed. On the upper surface of the upper case, an inclined surface that gradually increases the width of the rib from the side surface side of the upper case toward the tip is formed, and the fitting groove has a groove facing the rear side so as to match the inclined surface of the rib. An inclined surface that gradually increases in width is formed.

The rib is fitted in the fitting groove,
It is preferable that the bottom cover be attached to a predetermined attachment position by sliding along the rib. In addition, an inclined surface is formed on both side walls of the upper case so as to narrow the width of the upper case upward, and the inclined surface has a steeper slope above the side wall than below the side wall. Is preferred.

In the instant film pack according to the present invention, the drawer sheet is provided with a developing solution pod containing a developing solution, and the image receiving sheet is stored in the pack body. Chips are provided at both ends of the developing solution pod and provide a gap between the drawer sheet and the image receiving sheet, and ribs are provided on the inner wall surface side of the bottom cover at positions corresponding to the chips. Have been.

Further, in the instant film pack according to the present invention, the bottom cover is formed with a rear plate which is bent vertically upward from a rear end of the bottom plate portion, and a corner extending from the bottom plate portion to the rear plate is formed. On the inner side, a rib is provided at a position where it comes into contact with the lower edge of the back wall of the upper case when the pack body is pressed from above and below.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a film pack 10 to which the present invention is applied includes a film unit 11 and
It is composed of a pack body 12 for storing this.
Actually, in the unused state, the light-shielding sheet covers the film unit 11 inside the pack body 12, and for example, ten film units 11 are stacked and
2, only one film unit 11 is shown to avoid complication of the drawing.

The following are used as the light shielding sheets described above. 30% softwood pulp, 7 hardwood pulp
Using a 0% mixed pulp, cationized polyacrylamide as a paper strengthening agent, a rosin derivative as a sizing agent, aluminum sulfate as a fixing agent, polyvinyl carbonate containing calcium carbonate and titanium oxide as a surface sizing agent, and fourdrinier papermaking. A prepared 0.11 mm, 123 g / m ² base paper is prepared. The base paper is gravure-printed with a polyamide / nitrified cotton mixed resin, and at least the printed surface or both surfaces are impregnated with microcrystalline wax as an overcoat layer (protective layer), and the slip coefficient of the overcoat layer surface is 0.2. The light shielding sheet has the following configuration. The weight of the paper support of the light-shielding sheet is 50 g.
/ M ² ~210g / m ^2, preferably from 100g / m ² ~
160 g / m ^{2 is} good, and the thickness is 0.04 mm to 0.20
mm, preferably 0.09 mm to 0.15 mm.

The film unit 11 includes a photosensitive sheet 15
A drawer sheet 16 is joined to the front end of the skirt, and a short skirt 17 for receiving excess developing solution is provided at the rear end.
Are joined. Further, a developing solution pod 19 containing a developing solution is provided beside the photosensitive sheet 15 at the rear end side of the drawer sheet 16, and the developing solution is applied to the photosensitive sheet 15.
, And a tab 22 is joined to a tip side of the funnel 21.

The image receiving sheet 25 is for recording a final photographic image, and is joined to the mask sheet 26 via a weak seal layer. The mask sheet 26 has an opening 26a corresponding to the screen size, and its front end is joined to the drawer sheet 16 as described above. A pair of relatively thick strip-shaped rails 2 are provided on both sides of the opening 26a.
7 are adhered. A pair of hard plastic liquid reservoir chips 28 are adhered to the rear end of the rail 27. In the space sandwiched between the liquid reservoir chips 28 on the upper surface of the mask sheet 26, a space for preventing excess developing solution from being pushed out by a developing roller 65 described later is secured, and the film unit 11 is When housed in the pack body 12, the liquid storage chip 28 is located on both side ends of the developing solution pod 19. As a result, the liquid storage chip 28 forms a gap between the drawer sheet 16 and the photosensitive sheet 15 and the developing solution pod 1
9 is not crushed.

The pack body 12 includes an upper case 30 forming an upper surface of a box-shaped case body having a substantially rectangular parallelepiped shape, a bottom cover 31 forming a bottom surface of the case body, and a film pressure plate 32 housed between the two. These are all made by injection molding of plastic. Various plastic materials that can be injection-molded, such as polystyrene, ABS, PPE (polyphenyl ether), polycarbonate, and polypropylene, can be used. In addition,
These plastic materials are mixed with about 1% by weight of a light-shielding substance, for example, carbon black, for the purpose of imparting light-shielding properties.

It is also advantageous to use a biodegradable plastic for the purpose of further improving the proper disposal of the pack body 12. Examples of biodegradable plastics include synthetic products, products produced by fermentation, and products mainly composed of natural products.Each of them is, for example, a fatty acid polyester represented by polylactic acid, a polyester produced by microorganisms, and a starch mainly composed of starch. PVA (polyvinyl alcohol) is exemplified.

An exposure opening 33 is formed on the upper surface of the upper case 30, and an exposure opening frame 34 (see FIG. 1) projecting upward from the upper case 30 is formed around the exposure opening 33. The lower edge of the front wall 36 of the upper case 30 is above the lower edges of the rear wall and the side walls, and forms an outlet of the film unit 11 between the upper case 30 and the bottom cover 31. Ribs 37 are integrally formed on both side walls of the upper case 30, and cutouts 38 are formed below the ribs 37 on both side walls. Rib 37
Specifically, as shown in FIG. 1, the upper surface 37a is formed as an inclined surface such that the width of the rib 37 increases from the side surface 30a side of the upper case 30 toward the tip.

The side surface 30a of the upper case 30 is formed with an inclined surface so as to narrow the width of the upper case 30 from below to above. This is formed as a draft for allowing the upper case 30 cooled and hardened in the mold to be easily released from the mold during injection molding. Further, as shown in the enlarged view of FIG. 1, the inclination of the side surface 30a is larger at the draft angle B above the side surface 30a than at the draft angle A below the side surface 30a. Thus, the area of the upper surface 37a of the rib 37 is increased without increasing the outer shape of the conventional upper case.

The film pressure plate 32 is formed by integrally forming a support plate 41 of the film unit on the front end side of the flat plate portion 40, a semi-cylindrical portion 42 on the rear end side, and side plates 43 on both side surfaces. A pair of locking holes 41a is opened at the end of the support piece 41, and is used when the end of the film unit 11 is stopped with a stapler 44 together with a light-shielding sheet (not shown).
Even when the film pressure plate 32 is accommodated in the upper case 30 and moved to the uppermost position in the upper case 30, the lower edge of the side plate 43 is located within the height range of the notch 38 when viewed from the side. That is, regardless of the vertical position of the film pressure plate 32 in the upper case 30, the notch 3 is formed so that the upper edge of the notch 38 does not fall below the lower edge of the side plate 43.
8 and the height of the side plate 43 are determined.

The bottom cover 31 has side plates 47 integrally formed on both sides of a bottom plate 46 and a rear plate 48 integrally formed on the rear end side.
The side plate portion 47 is, as shown in detail in FIG.
Vertical part 49 bent vertically upward from the
And a protruding part 50 protruding inward from the upper edge. The protruding portion 50 has a notch 53 formed in a portion located above a wing piece 52 described later. A fitting groove 55 that fits with the rib 37 of the upper case 30 is formed in a space surrounded by the bottom plate part 46, the vertical part 49, and the protruding part 50. The lower surface 50a of the protruding portion 50 is
From the tip side of the protruding portion 50 so that the vertical portion 4
The fitting groove 55 is formed on an inclined surface such that the width of the fitting groove 55 increases toward the ninth side.

A pair of projections 57 (see FIG. 3) are formed on the inner wall surface at the rear end of the vertical portion 49 and are engaged with a pair of engagement grooves 58 formed in the rib 37. The rear plate 48 is bent vertically upward from the rear end of the bottom plate 46, and
7 is formed at substantially the same height as the vertical portion 49.

A pair of blade pieces 52, 52 serving as urging force transmitting means for transmitting the urging force of the leaf spring 61 of the pack holder 60 (see FIGS. 6 and 7) to the film pressure plate 32 are integrally provided on the bottom plate portion 46. Have been. Further, a notch 63 is formed on the front edge side of the bottom plate portion 46, and a sponge sheet 64 is provided so as to protrude into the notch 63.

The sponge sheet 64 is formed by bonding a urethane sponge to the upper surface of a paper material as a support.
As will be described in detail later, when the film unit is pulled out after the exposure, it is used as a restricting means for restricting the image receiving sheet 25 from moving until the photosensitive sheet 15 is pulled out to a certain position. .

On the upper surface of the bottom plate portion 46, as shown in FIG. 3, a grid-like reinforcing rib 66, a pod protecting rib 67,
Linear reinforcing ribs 68 and unit guide ribs 70 and 71
And a contact rib 72 are formed. The lattice-shaped reinforcing ribs 66 are formed in a lattice shape over substantially the entire surface of the bottom plate portion 46, but are not formed in a portion where the developing solution pod 19 of the film unit 11 is located above. In this portion, a wide linear reinforcing rib 68 is formed near the center instead of the lattice-shaped reinforcing rib 66. The pod protection rib 67 is formed at a position where the liquid storage chip 28 is located above, so that when the film pack 10 is pressed from the lower surface, the pressing from the bottom plate portion 46 is not transmitted to the developing solution pod 19. To

The unit guide ribs 70, 71 are located on an extension of the pod protection rib 67, and the unit guide rib 70 is provided on the upper surface of the wing 52.
Is formed near the notch 63. The unit guide ribs 70 and 71 and the pod protection rib 67 are formed at positions where they come into contact with both ends of the image receiving sheet 25. Thus, when the film unit 11 is pulled out, the unit guide ribs 70 and 71 and the pod protection rib 69 press the image receiving sheet 25 above the upper case 30, so that the image receiving sheet 25 and the photosensitive sheet 15 are , Can be prevented from being caught between the film pressure plate 32 and the bottom plate portion 46. The contact rib 72 is formed at a plurality of positions inside a corner portion that continues from the bottom plate portion 46 to the rear plate 48, and the lower edge of the rear wall 73 of the upper case 30 when the film pack 10 is pressed from above and below. Abut. Thereby, the internal space of the upper case 30 is narrowed in the vertical direction, and it is possible to prevent the developing solution pod 19 from being pressed.

FIG. 4 is a sectional view of a main part showing a state where the film packs 10 are stacked. In addition, illustration of the film unit 11 is omitted in order to prevent the drawing from being complicated.
As shown in this figure, a concave portion 75 is formed on the lower surface of the bottom cover 31, and positioning can be easily performed by aligning the concave portion 75 with the exposure opening frame 34 of the upper case 30. In addition, when the concave portion 75 and the exposure opening frame 34 are stacked with their positions aligned, they do not collapse even in a slightly inclined place. 5 is provided on the lower surface of the bottom cover 31.
As shown in FIG. 7, a push-inhibition mark 76 is provided.
The push-inhibited mark 76 is designed to depict that strong pressing should not be applied by grasping this portion, and is located below the developing solution pod 19.

The film pack 10 is used by being loaded into a pack holder 60 shown in FIGS. The pack holder 60 is also called a camera back, and includes a roller assembly 78 including a pair of deployment rollers 77.
And a front plate 82 rotatably mounted on the holder main body 79 by a shaft 81. A rectangular opening 82a is formed in the front plate 82, and the pack holder 60 is used by fixing the front plate 82 so that the surface of the front plate 82 is in close contact with the rear surface of the camera. Reference numeral 82b denotes a ridge used when positioning the pack holder 60 on the back of the camera.

A pack holding frame 83 is provided on the inner side of the front plate 82, and the film pack 10 is mounted on the pack holding frame 83.
Fit into. Film pack 1 in pack holding frame 83
0, the back wall of the upper case 30 is pressed by a leaf spring 84 incorporated at one end of the pack holding frame 83, and the front wall 36 of the upper case 30 is
At the other end side wall surface. As a result, the film pack 10 is stably held in the pack holding frame 83. In the case of a pack holder integrated with the camera, the front plate 82 is omitted and the pack holding frame 8 is omitted.
3 is fixed to the camera body, and the holder main body 79 can be freely opened and closed with respect to the camera body, but the film pack 10 can be loaded in exactly the same manner.

A leaf spring 61 is fixed to the inner wall of the holder body 79. When the film pack 10 is loaded into the pack holding frame 83, and the front plate 82 is closed and stopped with the clip metal 85, the leaf spring 61 causes the wing piece 52 formed on the bottom lid 31 of the pack body 12 to be closed as shown in FIG. Push up. Since the wing pieces 52 are in contact with the lower edge of the side plate 43 of the film pressure plate 32, the film pack 10 is pushed upward by the urging force of the leaf spring 61, and the upper surface of the upper case 30 is moved upward by the front plate 82 of the pack holder 60. The film pack 10 is positioned in the photographing optical axis direction. Further, the projection 86 formed on the inner wall of the holder body 79 is provided with the sponge sheet 64 attached to the bottom lid 31 of the pack body 12.
To push up.

As is well known, in the peel apartment type film unit 11, a photosensitive sheet 15 and an image receiving sheet 25 are housed in a pack body 12 separately above and below a film pressure plate 32. In the unused state, the exposure opening 33 is covered with a light shielding sheet (not shown). The photosensitive sheet 15 and the image receiving sheet 25 are connected to the drawer sheet 16 in series, but the photosensitive sheet 15 is
The image receiving sheet 2 is positioned on the film pressure plate 32 toward
5 is located below the film pressure plate 32 with the upper side 5 facing upward.

After the photographing is performed through the opening 82a of the pack holder 60 and the exposure opening 33 of the pack main body 12, the tab 22 protruding from the drawer opening 87 formed between the holder main body 79 and the front plate 82 is pulled out. When you operate,
The drawer sheet 16 moves toward the developing roller 77, and the leading end protrudes from the discharge port while pushing and spreading the discharge door 88 between the pair of developing rollers 77. When the drawer sheet 16 is pulled out to this point, the portion to which one end of the tab 22 is adhered comes almost directly below the drawer opening 87, and the tab 22 is peeled off from the drawer sheet 16 by the pulling operation force applied to the tab 22. When the first tab 22 is peeled off in this manner, the tab 22 of the next film unit 11 comes out from the outlet 87.

Subsequently, when the drawer sheet 16 protruding from between the developing rollers 77 is pinched and pulled out, the photosensitive sheet 15 moves to the left side in the figure and is inverted by the semi-cylindrical portion 42 of the film pressure plate 32. The film enters the lower side of the film pressure plate 32 downward. At the same time, the developing solution pod 19 approaches the developing roller 77 side beyond the image receiving sheet 25. After the exposure surface of the photosensitive sheet 15 connected to the drawer sheet 16 moves to a position facing the image receiving sheet 25, the photosensitive sheet 15 and the image receiving sheet 25
Move toward the developing roller 77 while overlapping.

When the drawer sheet 16 is further pulled out, the developing solution pod 19 is crushed by the developing roller 77 immediately before the photosensitive sheet 15 and the image receiving sheet 25 enter the space between the developing roller 77, and sealed therein. The developing solution that has been used is removed from the photosensitive sheet 1 with the continuation of the withdrawal operation.
5 and the image receiving sheet 25 are developed with a uniform thickness.
After the film unit 11 is completely pulled out from between the developing rollers 77, a positive image appears on the image receiving sheet 25 after a predetermined developing and fixing time has elapsed, and a print photograph is obtained by peeling off only the image receiving sheet 15 from the film unit. Can be When the first film unit is pulled out in this manner, the film pressure plate 32 is pushed up via the wings 52 by the urging force of the leaf spring 61 of the holder body 79, so that the second photosensitive sheet 15 is placed on the upper surface of the upper case 30. And the preparation for the next shooting is completed.

The unfolding roller 77 is moved by the pull-out operation.
In the conventional film unit, the corner portion on the front end side of the mask sheet 26 is caught between the side plate 43 of the film pressure plate 32 and the bottom cover 31, so that the photosensitive sheet 15 and the image receiving sheet In some cases, the film unit 11 of the present embodiment may be pulled out while overlapping with the position of the film unit 25 shifted.
A film unit similar to the film unit described in Japanese Patent Application Publication No. 55-55 is used. As shown in FIG. 8, a notch 90 is formed in a corner portion on the front end side of the mask sheet 26 to prevent the mask sheet 26 from being caught. I have. Also, the side plate 43
In order to further prevent the mask sheet 26 from being caught between the bottom cover 31 and the bottom cover 31, as shown in FIG. 9, in addition to the notch 90, from the tab 22 to the corner portion 91 at the front end of the drawer sheet 16. May be formed in a straight line 92.

The operation of the above configuration will be described below.
If the film pack 10 is accidentally dropped during loading into the pack holder 60 or the like, the impact may cause the upper case 30 and the bottom cover 31 to be disengaged from each other. In the film pack 10 of FIG.
7 and the lower surface 5 of the protrusion 50 on the fitting groove 55 side.
0a is provided with an inclined surface to make the fitting between the upper case 30 and the bottom cover 31 more firm. Further, the side 3 of the upper case 30
The draft angle of 0a is formed by increasing the upper draft angle B and decreasing the lower draft angle A.
The area of the upper surface 37a of the rib 37 can be made large, and the area for fitting with the fitting groove 55 is increased.

Further, even when the bottom cover 31 is detached from the upper case 30 due to deformation such as impact of drop or heat, the bottom cover 31 can be easily attached. Bottom lid 3
When attaching 1, the upper case 30 is slid from the back side to fit the rib 37 and the fitting groove 55. Further, when the bottom cover 31 is slid forward of the upper case 30, the pair of projections 57 and the locking grooves 58 are fitted, and
The rear wall 73 of the upper case 30 contacts the rear plate 48 of the bottom cover 31. Thus, the bottom cover 31 is attached to the predetermined position of the upper case 30. In addition, since attachment to a predetermined position is performed with reference to a pair of locking grooves 58 or a back wall 73, for example, one of the rear plate 48 of the bottom cover 31 or the projection 57 is damaged. Even if it does, the remaining two places are locked or abutted and the bottom cover 31
Can be mounted in place.

[0040]

As described above, according to the instant film pack of the present invention, on the upper surface of the rib, an inclined surface for gradually increasing the width of the rib from the side surface of the upper case toward the tip is provided.
In the fitting groove, by forming an inclined surface that gradually increases the width of the groove toward the back side so as to match the inclined surface of the rib, the fitting of the bottom lid to the upper case becomes strong, and plastic molding Even in a pack body made of a product, the bottom lid does not come off from the upper case.In addition, both sides of the upper case are formed with a steep upper slope and a gentle lower slope, increasing the area of the upper surface of the rib. Therefore, the fitting between the bottom cover and the upper case is further strengthened.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a film pack of the present invention.

FIG. 2 is an exploded perspective view of the film pack of the present invention.

FIG. 3 is a top view of a bottom cover constituting the film pack.

FIG. 4 is a sectional view of a main part showing a state where the film packs are stacked.

FIG. 5 is an explanatory view showing a push-inhibit mark provided on the lower surface side of the bottom cover shown in FIG. 3;

FIG. 6 is a perspective view showing a pack holder and a film pack in an opened state.

FIG. 7 is a cross-sectional view of a main part showing a case where the film pack of the present invention is loaded in a pack holder.

FIG. 8 is an explanatory view showing a film unit loaded in the film pack of the present invention.

FIG. 9 is an explanatory view showing a film unit used in another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Film pack 11 Film unit 12 Pack body 15 Photosensitive sheet 16 Drawer sheet 19 Developing solution pod 22 Tab 25 Image receiving sheet 26 Mask sheet 28 Liquid storage chip 30 Upper case 31 Bottom cover 32 Film pressure plate 33 Exposure opening 37 Rib 37a Upper surface 47 Side plate Part 49 Vertical part 50 Projecting part 50a Lower surface 55 Fitting groove 57 Convex part 58 Locking groove

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03C 3/00 555 G03C 3/00 555A 8/42 502 8/42 502

Claims (5)

[Claims] An upper case has an exposure opening formed on its upper surface, ribs formed on both side surfaces thereof, and an upper case having an open bottom portion, and a fitting groove slidably fitted with the rib formed on both side end portions. A pack body comprising a bottom cover that covers the bottom and is attached to the upper case so as to form a film unit outlet on the front surface of the upper case, and a film pressure plate housed between the upper case and the bottom cover. A photosensitive sheet connected to the drawer sheet is arranged on the upper surface side of the film pressure plate so as to face the exposure opening, and connected to the drawer sheet via a connection sheet on the bottom surface side of the film pressure plate. An image receiving sheet is arranged, and by pulling out the leading end of the drawer sheet protruding from the discharge port, the photosensitive sheet and the image receiving sheet overlap each other and are pulled out from the discharge port. In the instant film pack, which accommodates a film apartment type instant film unit, and wherein the upper case, the bottom lid, and the film pressure plate are each formed of a plastic molded product, the upper surface of the rib is provided from the side of the upper case to the tip. An inclined surface that gradually increases the width of the rib is formed, and an inclined surface that gradually increases the width of the groove toward the back side is formed in the fitting groove so as to match the inclined surface of the rib. Features an instant film pack. 2. By fitting the rib into the fitting groove and sliding the bottom cover along the rib,
The instant film pack according to claim 1, wherein the instant film pack is attached to a predetermined attachment position. 3. An inclined surface is formed on both side walls of the upper case so as to narrow the width of the upper case upward.
3. The instant film pack according to claim 1, wherein the inclined surface has a steeper slope above the side wall than below the side wall. 4. A developing solution pod containing a developing solution is provided on the drawer sheet, and the image receiving sheet is provided on both sides of the developing solution pod when the image receiving sheet is housed in the pack body. A chip which is located and provides a gap between the drawer sheet and the image receiving sheet is attached, and a rib is provided on the inner wall surface side of the bottom cover at a position corresponding to the chip. 4. The instant film pack according to any one of 1 to 3. 5. A bottom plate is formed on the bottom lid with a rear plate bent vertically upward from a rear end of the bottom plate portion, and the pack main body is disposed inside a corner connecting the bottom plate portion to the rear plate in a vertical direction. The instant film pack according to any one of claims 1 to 3, wherein a rib is provided at a position where the rib contacts the lower edge of the rear wall of the upper case when the rib is pressed from the inner case.