JP2004170828A - Instant photo film pack and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more reliably fasten film units in a film pack body without damaging the film pack body. <P>SOLUTION: A plurality of film units 14 and a light shielding sheet 16 are fastened in a stacked state to a film pressing plate 24 of a film pack body constituting an instant photo film pack by caulking a staple 22. At this time, a caulking height H of the staple 22 is adjusted to a range of 80±5[%] of [T1+T2+T3×2] from relation with the thickness T1 of a support portion 42 of the film pressing plate 24, the thickness T2 of the film units 14 and the light shielding sheet 16 in the stacked state, and the thickness T3 of the staple 22. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an instant film pack and a method for manufacturing the same, and more particularly to an instant film pack for storing a film unit in an instant film pack with a staple, and a method for manufacturing the same.
[0002]
[Prior art]
In general, the self-development type instant film unit includes a mono-sheet type and a peel apartment type. Among them, in a peel apartment type instant film unit (hereinafter simply referred to as a film unit), the photosensitive sheet and the image receiving sheet are stored in the instant film pack body in a separated state, thereby forming an instant film pack. The Then, after shooting, that is, after exposure, when the drawing sheet of the film unit is pulled out between a pair of developing rollers of the camera back (pack holder) on which the instant film pack is mounted, the photosensitive sheet and the image receiving sheet are superimposed, Further, in the process of drawing out, the pod containing the developing solution is crushed and the developing solution is developed between the photosensitive sheet and the image receiving sheet.
[0003]
The instant film pack body includes, for example, a substantially rectangular parallelepiped box-shaped upper case constituting the upper surface of the case body, a bottom lid constituting the bottom surface of the case body, and a film pressure plate accommodated therebetween. These are all manufactured by injection molding of plastics for the purpose of cheaper and lighter. The film unit is fastened to the film pressure plate in a state where a plurality of film units are stacked by a staple (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP 2000-122252 A (paragraphs [0013], [0030] and [0033])
[0005]
[Problems to be solved by the invention]
The present invention has been made in connection with the invention of Patent Document 1, and when the film unit is fastened to the instant film pack main body with a staple, the instant film pack main body is not damaged, and the film is more reliably obtained. It is an object of the present invention to provide an instant film pack and a method for manufacturing the same that can hold the unit.
[0006]
[Means for Solving the Problems]
The instant film pack of the present invention is stored in a film pack body constituted by a plastic casing in a state in which a plurality of film units having a photosensitive sheet and an image receiving sheet and a light shielding sheet that covers the film unit and shields light are stacked. And an instant film pack in which the plurality of film units and the light shielding sheet are fastened to the film pack body by caulking a staple.
The caulking height when the staple is caulked is a thickness T1 of the caulking part of the film pack body by the staple, a thickness T2 in which a predetermined number of the film units and the light shielding sheets are laminated, From the relationship with the thickness T3 of the staple, it is in the range of 80 ± 5 [%] of “T1 + T2 + T3 × 2”.
[0007]
According to the instant film pack of the present invention, based on the relationship between the thickness T1 of the caulking portion of the film pack body, the thickness T2 in a state where a predetermined number of film units and light shielding sheets are stacked, and the thickness T3 of the staple needle, The caulking height of the staple needle is set in the above range. This makes it possible to avoid damage to the film pack body and to obtain a sufficient caulking force for holding the light shielding sheet and the film unit on the film pack body. As a result, the light shielding sheet and the film unit can be reliably held on the film pack body by the staple.
[0008]
The instant film pack manufacturing method of the present invention includes a plurality of film units having a photosensitive sheet and an image receiving sheet, and a light-shielding sheet that covers the film unit and shields light from the film pack body constituted by a plastic casing. A method for producing an instant film pack, which is stored in a stacked state, and wherein the plurality of film units and the light shielding sheet are fastened to the film pack body by caulking a staple.
The staple needle includes a thickness T1 of a caulking portion of the film pack body by the staple needle, a thickness T2 in which a predetermined number of the film units and the light shielding sheets are stacked, and a thickness T3 of the staple needle. From the relationship, it is characterized by caulking at a height of 80 ± 5 [%] of “T1 + T2 + T3 × 2”.
[0009]
According to the instant film pack manufacturing method of the present invention, the relationship between the thickness T1 of the caulking portion of the film pack body, the thickness T2 in which a predetermined number of film units and light shielding sheets are laminated, and the thickness T3 of the staple needle Based on this, the caulking height of the staple needle is set in the above range. This makes it possible to avoid damage to the film pack body and to obtain a sufficient caulking force for holding the light shielding sheet and the film unit on the film pack body. As a result, the light shielding sheet and the film unit can be reliably held on the film pack body by the staple.
[0010]
Furthermore, the manufacturing method described above includes a step of inspecting the height of the staple needle by the first image recognition means. Thereby, it can be estimated whether the caulking force by the staple needle is within a predetermined range, depending on whether the caulking height of the staple needle is within the above range. As a result, the destructive inspection for actually measuring the caulking force by the staple needle is not required, and the productivity of the instant film pack can be improved.
[0011]
Further, the manufacturing method described above includes a step of inspecting the stapled state of the staple by a second image recognition means. As a result, even if caulking defects occur in the film pack body, for example, cracks, deformation, or the like, or the caulking state of the staple needle is out of a predetermined range, these caulking defects can be detected. .
[0012]
Furthermore, in the manufacturing method described above, the caulking height is out of a predetermined range based on the inspection result of the caulking height of the staple needle or the inspection result of the caulking state of the staple needle, or the caulking state is A step of eliminating those determined to be caulking defects is included. As a result, for example, it is possible to automatically exclude those staples whose caulking height is out of a predetermined range or those that have become caulking defective by a command from the control means in the manufacturing process of the instant film pack. It becomes.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The preferred embodiment of the instant film pack according to the present invention will be described in detail with reference to the accompanying drawings.
[0014]
FIG. 1 is an exploded perspective view of an instant film pack (hereinafter simply referred to as a film pack) 10 according to the present embodiment, and FIG. 2 is a vertical cross-sectional view of the film pack 10.
[0015]
The film pack 10 is configured by storing a plurality of film units 14 in a film pack body 12. Further, the film pack 10 includes a light shielding sheet 16 for shielding light in an unused state.
[0016]
The film pack main body 12 covers the exposure side case 18 that is a substantially rectangular parallelepiped box shape that constitutes the exposure surface side of the film pack main body 12 and the opening 18 a on the bottom side of the exposure side case 18 so as to cover the bottom surface of the film pack main body 12. And a film pressure plate 24 which is accommodated between the exposure side case 18 and the bottom case 20 and holds the light shielding sheet 16 and the plurality of film units 14 by the staple needles 22. The film pack body 12 normally stores about 10 [units] of the film unit 14, but FIG. 2 shows only 1 [unit] of the film unit 14 for easy understanding.
[0017]
Here, in the present embodiment, the exposure side case 18, the bottom side case 20, and the film pressure plate 24 are manufactured from, for example, a plastic material by injection molding. In this case, polystyrene, ABS (acrylonitrile butadiene styrene), PPE (polyphenyl ether), polycarbonate, polypropylene or the like is used as the plastic material. Prior to the injection molding of the exposure side case 18, the bottom side case 20, and the film pressure plate 24, about 1% by mass of a light shielding substance such as carbon black is mixed with these plastic materials for the purpose of providing light shielding properties. Is done.
[0018]
The exposure side case 18 includes an exposure opening 26, a front end wall 28 formed on the front side of the exposure side case 18, a rear end wall 30 formed on the back side of the exposure side case 18, and the exposure side case 18. Side walls 32a and 32b are formed on both sides. The front end wall 28 is disposed above the edge of the rear end wall 30 and the edges of the side walls 32 a and 32 b in FIG. 1, and pulls the film unit 14 between the bottom case 20 and the front end wall 28. An outlet 34 is formed. Ribs 36 are formed on the side walls 32 a and 32 b of the exposure side case 18 so as to extend in the longitudinal direction of the exposure side case 18. Further, a notch 38 is formed below the rib 36 of each side wall 32a, 32b.
[0019]
The film pressure plate 24 includes a flat plate portion 40, a support portion (caulking portion) 42 formed on the front end side of the flat plate portion 40, a sheet reversing portion 44 formed in a circular arc shape on the rear end side of the flat plate portion 40, Side plates 46 a and 46 b formed on both sides of the flat plate portion 40. A pair of locking holes 42a and 42b are provided at the corners of the support portion 42 on the side plate 46a side. These locking holes 42 a and 42 b are used when the corner 16 a of the light shielding sheet 16 and the corner 14 a (see FIG. 3) of the film unit 14 are fastened by the staple needle 22. The sheet reversing unit 44 reverses a photosensitive sheet 70 described later when the film unit 14 is pulled out.
[0020]
Here, when the film pressure plate 24 is accommodated in the exposure side case 18, the film pressure plate 24 is pressed upward in FIG. 1, but the edges of the side plates 46 a and 46 b of the film pressure plate 24 are notched in the exposure side case 18. It is located within the depth range of 38. That is, the height of the notch 38 and the side plate 46a are set so that the bottom of the notch 38 does not protrude beyond the edges of the side plates 46a and 46b, regardless of the vertical position of the film pressure plate 24 in the exposure side case 18. , 46b is determined.
[0021]
The bottom case 20 includes a bottom plate portion 48 and side plate portions 50 a and 50 b formed on both sides of the bottom plate portion 48. The bottom plate portion 48 is provided with a pair of wing pieces 52a and 52b serving as a biasing force transmitting means for transmitting a biasing force such as a leaf spring of a camera back (not shown) to which the film pack 10 is mounted to the film pressure plate 24. The wing pieces 52a and 52b are formed by hot press molding after forming "U" -shaped cuts 54a and 54b in the bottom plate portion 48. The tips of the blade pieces 52a, 52b are maintained in a state of being inclined toward the side plate portions 50a, 50b and toward the film pressure plate 24, respectively. In the present embodiment, the case where the blade pieces 52a and 52b are formed by hot press molding is exemplified. However, for example, when the bottom case 20 is injection-molded, it can be integrally molded by a mold structure. It is.
[0022]
A notch 56 is formed on the side of the bottom plate portion 48 corresponding to the front end wall 28 of the exposure side case 18, and a sponge sheet 58 is provided so as to protrude into the notch 56. The sponge sheet 58 is obtained by bonding a urethane sponge 58b or the like on the upper surface of a paper material 58a as a support. The sponge sheet 58 is in sliding contact with the back surface of an image receiving sheet 72, which will be described later, when the film unit 14 is pulled out, and acts as a restricting means for restricting the movement thereof. In the present embodiment, the sponge sheet 58 is exemplified as the restricting means. However, when the bottom case 20 is injection-molded, for example, a restricting plate provided with a plurality of projecting portions (not shown) due to the structure of the mold. May be integrally formed.
[0023]
The side plate portions 50 a and 50 b have flange portions 60 whose edges protrude inside the bottom case 20. The flange portion 60 surrounds the ribs 36 formed on the side walls 32 a and 32 b of the exposure side case 18 when the bottom case 20 is slid from the rear end wall 30 side of the exposure side case 18. To support. Thereby, the exposure side case 18 and the bottom case 20 are integrally fitted. In addition, in order to hold | maintain the fitting state of the exposure side case 18 and the bottom case 20 more reliably, the corner of the side plate parts 50a and 50b of the bottom case 20 on the rear end side of the exposure side case 18 is provided. Engagement protrusions 64 that engage with engagement grooves 62 formed in the lower part of the ribs 36 on the side walls 32a and 32b on the rear end wall 30 side are formed.
[0024]
The film unit 14 connects the photosensitive sheet 70, the image receiving sheet 72, the photosensitive sheet 70 and the image receiving sheet 72, and is connected to the drawer sheet 74 for pulling them out from the camera back, and the drawer sheet 74. And a tab 76 for guiding the drawer sheet 74 to the outlet of the camera back, and a pod 78 containing a developing solution. The film unit 14 is covered with a light shielding sheet 16 when not in use.
[0025]
The photosensitive sheet 70 and the image receiving sheet 72 are connected in series with the drawer sheet 74. In the film pack body 12, the photosensitive sheet 70 is positioned facing the exposure opening 26 side of the exposure side case 18, while the image receiving sheet is received. The sheet 72 faces the bottom plate portion 48 of the bottom case 20 and is positioned below the film pressure plate 24. The drawer sheet 74 is located between the image receiving sheet 72 and the film pressure plate 24 in the film pack body 12. The tab 76 protrudes to the outside together with the light shielding sheet 16 from the outlet 34 of the film pack body 12. The pod 78 is affixed to the drawer sheet 74 and is positioned facing the image receiving sheet 72 in the film pack body 12.
[0026]
When the film pack 10 configured as described above is mounted on the camera back, the light shielding sheet 16 is disposed so that one end of the light shielding sheet 16 protrudes from the discharge port of the camera back. The corner 16a on the other end side of the light shielding sheet 16 is fastened to the film pressure plate 24 together with the corner 14a of the film unit 14 by the staple needle 22, and when one end of the light shielding sheet 16 protruding from the discharge port is pulled out, the staple needle 22 is drawn. Is torn from a cutting site 80 (see FIG. 3) such as a notch or a perforation provided around the corner 16a fastened by the above, and is taken out through the discharge port as a series of sheet bodies. As a result, the first photosensitive sheet 70 appears in the exposure opening 26 and the preparation for photographing is completed.
[0027]
One end of the light shielding sheet 16 is bonded to the other end of a tab 76 having one end bonded to the drawer sheet 74 of the first film unit 14. When the light shielding sheet 16 is taken out, the other end of the tab 76 is connected to the discharge port. Protrude from. At this time, the blade pieces 52a and 52b provided on the bottom plate portion 48 of the film pack body 12 abut against the edge portions of the side plates 46a and 46b of the film pressure plate 24, and the film pressure plate 24 is provided with a leaf spring or the like (not shown) of the camera back. It is pressed against the exposure side case 18 by the force. Therefore, the photosensitive sheet 70 used for photographing is disposed at a fixed position with respect to the exposure opening 26 in the film pack body 12.
[0028]
When the tab 76 is pulled out after photographing, that is, after the exposure of the photosensitive sheet 70, the pull-out sheet 74 is guided by the tab 76 toward a pair of developing rollers (not shown) on the camera back, and when further pulled out, the photosensitive sheet. 70 and the image receiving sheet 72 are overlaid. During this time, the image receiving sheet 72 is held immovable by the pressing force and frictional force of the sponge sheet 58. Therefore, the photosensitive sheet 70 and the image receiving sheet 72 are introduced between the developing rollers in a state where they are always overlapped at a predetermined position.
[0029]
Next, when the drawing sheet 74 is pulled out from between the developing rollers, the pod 78 is crushed by the developing roller and the developing solution is developed between the photosensitive sheet 70 and the image receiving sheet 72. After the film unit 14 is completely pulled out from between the developing rollers, a positive image appears on the image receiving sheet 72 when a predetermined developing time and fixing time have elapsed, and only the image receiving sheet 72 is peeled off from the film unit 14 to print a photograph. Can be obtained.
[0030]
By the way, the film unit 14 is stapled after the corners 16 a and 14 a are positioned with respect to the locking holes 42 a and 42 b of the support portion 42 of the film pressure plate 24 in a state where a plurality of sheets are laminated together with the light shielding sheet 16. The needle 22 is caulked by a caulking means such as a known crimping device. That is, when the staple needle 22 is pressed toward the laminated light shielding sheet 16 and film unit 14, both ends of the staple needle 22 pierce the light shielding sheet 16 and film unit 14 to form the locking holes 42a and 42b. After penetrating, the both end portions are bent inward, and the light shielding sheet 16 and the film unit 14 are fastened to the support portion 42 of the film pressure plate 24.
[0031]
At that time, as shown in FIGS. 3 and 4, the caulking height H of the staple needle 22 is determined based on the examination result of various manufacturing conditions and the like, the thickness T1 of the support portion 42, the light shielding sheet 16 and the film unit 14. Is controlled so as to be in the range of 80 ± 5 [%] of “T1 + T2 + T3 × 2” from the relationship between the thickness T2 of the stacked layers and the thickness T3 of the staple needle 22. As a result, it is possible to avoid damage to the support portion 42 of the film pressure plate 24 and to obtain a sufficient caulking force for holding the light shielding sheet 16 and the film unit 14 at the support portion 42. As a result, the staple sheet 22 can securely hold the light shielding sheet 16 and the film unit 14 on the support portion 42 of the film pressure plate 24.
[0032]
Further, as shown in FIG. 5, during the manufacturing process of the film pack 10, for example, the caulking height H of the staple needle 22 is set by the image recognition means (first image recognition means) 82 such as an infrared camera or a CCD camera. It is possible to estimate whether or not the caulking force by the staple needle 22 is within a predetermined range by inspecting whether or not it is within the range. As a result, destructive inspection for actually measuring the caulking force by the staple needle 22 is not required, and the productivity of the film pack 10 can be improved.
[0033]
Further, by inspecting the caulking state by the staple needle 22 with another image recognizing means (second image recognizing means) 84, for example, around the locking holes 42a and 42b of the support portion 42, for example, cracks, deformation, etc. Or, even if caulking defects such as those in which the caulking interval S of the staple needle 22 is outside the predetermined range occur, these caulking defects can be detected.
[0034]
As described above, the stapler 22 and the surroundings of the locking holes 42a and 42b of the support portion 42 are inspected by the image recognition means 82 and 84, and the staple needle is in response to a command from the control means (not shown) based on the inspection results. It is possible to automatically exclude those whose caulking height H is out of the above range or those that have become caulking defects.
[0035]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0036]
That is, when the film unit and the light-shielding sheet are fastened to the film pack body with the staple, it is possible to avoid damage to the film pack body, and sufficient to hold the film unit and the light-shielding sheet in the film pack body. A caulking force can be obtained. As a result, the film unit and the light shielding sheet can be reliably held on the film pack body by the staple.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a film pack according to the present embodiment.
2 is an explanatory view of a longitudinal section of the film pack shown in FIG. 1. FIG.
FIG. 3 is an enlarged perspective view of a main part showing a caulking state of a staple needle of the film pack according to the present embodiment.
4 is a longitudinal cross-sectional explanatory view of the staple needle shown in FIG. 3 in a caulked state.
FIG. 5 is an explanatory diagram of image recognition means for inspecting the caulking height and the caulking state of the staple needle shown in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Film pack 12 ... Film pack main body 14 ... Film unit 16 ... Shading sheet 18 ... Exposure side case 20 ... Bottom side case 22 ... Stapling needle 24 ... Film pressure plate 42 ... Supporting part 42a, 42b ... Locking hole 70 ... Photosensitive sheet 72 ... Image receiving sheet 80 ... Cut site 82 ... First image recognition means 84 ... Second image recognition means H ... Caulking height S ... Caulking interval T1, T2, T3 ... Thickness

Claims (5)

A film pack body constituted by a plastic casing stores a plurality of film units each having a photosensitive sheet and an image receiving sheet and a light shielding sheet that covers the film unit and shields light, and crimps a staple. An instant film pack formed by fastening the plurality of film units and the light shielding sheet to the film pack body,
The caulking height when the staple is caulked is a thickness T1 of the caulking part of the film pack body by the staple, a thickness T2 in which a predetermined number of the film units and the light shielding sheets are laminated, An instant film pack characterized by being in the range of 80 ± 5 [%] of “T1 + T2 + T3 × 2” in relation to the thickness T3 of the staple. A film pack body constituted by a plastic casing stores a plurality of film units each having a photosensitive sheet and an image receiving sheet and a light shielding sheet that covers the film unit and shields light, and crimps a staple. A method for producing an instant film pack, in which the plurality of film units and the light shielding sheet are fastened to the film pack body,
The staple needle includes a thickness T1 of a caulking portion of the film pack body by the staple needle, a thickness T2 in which a predetermined number of the film units and the light shielding sheets are stacked, and a thickness T3 of the staple needle. Therefore, the instant film pack manufacturing method is characterized by being caulked at a height of 80 ± 5 [%] of “T1 + T2 + T3 × 2”. In the manufacturing method of Claim 2,
A method for producing an instant film pack, comprising a step of inspecting a caulking height of the staple needle by a first image recognition means. In the manufacturing method of Claim 2,
A method of manufacturing an instant film pack, comprising a step of inspecting a stapled state of the staple by a second image recognition means. In the manufacturing method of Claim 3 or 4,
Based on the inspection result of the staple needle caulking height or the staple needle caulking state, the caulking height is out of a predetermined range, or the caulking state is determined to be poor caulking The manufacturing method of the instant film pack characterized by including the process of eliminating.

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