JPH0443873Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to packaging of photosensitive strips such as photographic paper and photographic film wound into rolls.
More specifically, the present invention relates to a light-shielding container in which a terrestrial cloth is provided at the outlet of a photosensitive strip for loading under sunlight or indoor lighting.

(Prior Art) Various types of photosensitive strip containers have been disclosed. For example, Japanese Utility Model Publication No. 55-88980, Publication of Utility Model Publication No. 56-16608, Japanese Patent Application Publication No. 55-124140,
JP-A-57-128333, JP-A-59-36736, JP-A-60-156058, U.S. Patent No.
4148395 specification, US Patent No. 4179028 specification,
This is US Pat. No. 4,272,035.

Japanese Patent Publication No. 59-36736 discloses a photosensitive strip container 10 as shown in FIG. That is, it has a polygonal tubular member 1 which is open at both ends and has one slot 2 adjacent to one corner.
extends the entire axial dimension of the tubular member and defines a narrow outlet for passage of the photosensitive strip 3;
The photosensitive strip has a structure to keep the photosensitive strip 3 in the container 10 light-tight and has two molded end caps 4 for respectively closing the opening of the tubular body member 1. This is a container 10.

For example, polyolefins such as polypropylene and polyethylene, and polystyrene are used as materials for the end caps, but since polystyrene is more expensive than polyolefins, it is more common to use inexpensive polyolefins.

(Problem to be solved by the invention) However, since polyolefins such as polypropylene and polyethylene have a large molding shrinkage rate during molding, they are injection molded into a box shape with a flange extending around the periphery like the end caps mentioned above. In this case, the flange portion is likely to warp inward.
In particular, since the flange portion requires sufficient height to ensure light-shielding properties when assembled with the tubular body member, inward warpage is likely to occur.

Therefore, a photosensitive strip is stored in a tubular member in a darkroom using an end cap having a flange portion that is warped inward, and the end cap is fitted into the openings at both ends of the tubular member. When fabricating the photosensitive strip into a container, problems arise in terms of accuracy and assembly work. For this reason, there was a problem in that work efficiency was poor and intermediate products with incomplete assembly were often produced. Therefore, the inward warping of the flange part was corrected by changing the molding conditions during end cap molding, but this did not provide sufficient effect, and there was also the problem of increased costs due to longer molding cycles. .

(Purpose of the invention) The purpose of the invention is to solve the above-mentioned problems, and by preventing the flange portion from warping inward when forming the end cap, it is possible to assemble the end cap and the tubular body member. To provide a photosensitive strip container having an easy and inexpensive end cap.

(Means for Solving Problems) The above object of the present invention is to provide a container for holding a photosensitive strip 3, which has a polygonal tubular member 1. It is open at both ends and has one slot 2 adjacent to one corner,
This slot 2 extends in the entire axial direction of the tubular body member 1 and forms a narrow outlet through which the photosensitive strip 3 passes, and the slot 2 has a structure that keeps the photosensitive strip 3 in the container in a light-tight state. and having two molded end caps 4 for respectively closing said opening of said tubular body member 1, each said end cap 4 extending around its periphery. It is comprised of an outer flange 6 and an inner flange 7 that are substantially uniformly spaced apart, and has a polygonal engagement groove that engages with the opening edge of the tubular body member 1. at least one rib 9 on each side of
is provided, and the rib 9 has a length h from the edge of the outer flange 6 to the rib end surface that is 3/4 or less of the depth of the engagement groove, and the rib 9 has a length h from the edge of the outer flange 6 to the rib end surface that is 3/4 or less of the depth of the engagement groove, and This is achieved by a photosensitive strip container characterized in that notches 11 that fit into the ribs 9 are formed on each side of the container.

(Embodiment) One embodiment of the present invention will be described in detail based on the attached drawings.

As shown in FIG. 1, the end cap 4 according to the present invention
is a rectangular engagement member extending around the periphery of the end cap 4 and comprising an outer flange 6 and an inner flange 7 substantially uniformly spaced and engaging the open end edge of the tubular body member 1. The engagement groove has a rectangular shape with a rib 9 provided at the center of each side of the rectangular engagement groove.

The opening edge of the tubular body member 1 that engages with the engagement groove has a notch 1 that fits into the rib 9.
1, the opening edge can be reliably inserted deep into the engagement groove when the opening edge is inserted into the engagement groove and engaged.

Further, since the rib 9 is formed to have a length h from the edge of the outer flange 6 to the rib end surface, the vicinity of the edge of the outer flange 6 also has a length h in the notch 11. Light-shielding properties can be ensured by overlapping.

Therefore, in the end cap 4 configured as described above, the size of the rib 9 was changed and the amount of inward warpage at the center of each side of the outer flange 6 was measured. However, here, the end cap 4 is a square with a side length of 120 mm, and the engagement groove consisting of the outer flange 6 and the inner flange 7 with an inner thickness of 1.2 mm is 20 mm deep and 3 mm wide. The width was 1.2mm. Then, the length h from the edge of the outer flange 6 to the end surface of the rib was varied as the free height, and the amount of inward warpage was measured, and the results shown in FIG. 2 were obtained. As a result, in the end cap 4 configured as in the embodiment described above, if the rib 9 is provided so that the length h from the edge of the outer flange 6 to the rib end face is within 15 mm, the outer flange 6 can be It was found that it was possible to effectively suppress the amount of inward warpage. Therefore, length h: depth of engagement groove = 15mm:
20 mm, the length h of the rib 9 from the edge of the outer flange 6 to the end surface of the rib may be 3/4 or less of the depth of the engagement groove. Further, the amount of overlap when the opening edge of the tubular body member 1 is inserted into the engagement groove of the end cap 4 is required to be at least 3 mm or more in order to ensure light-shielding properties, and more preferably,
5mm or more is required.

In the embodiment described above, one rib was provided at the center of each side of the engagement groove of the end cap 4. For example, as shown in FIG.
A plurality of ribs 9 may be provided on each side of the
The greater the number of ribs 9, the greater the effect of suppressing inward warping of the outer flange. Further, the outer shape of the end cap is not limited to a rectangular shape, and it goes without saying that it can take other shapes.

(Effects of the invention) According to the invention, even if a material with a high molding shrinkage rate during molding, such as polyolefin, is used, it is possible to mold an end cap with a small amount of warpage at the flange. It is possible to prevent this from becoming a hindrance to the assembly work, and it becomes easier to assemble the tubular body member and the end cap.

Therefore, an inexpensive photosensitive strip container with high assembly efficiency can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the photosensitive strip container according to the present invention, and FIG. 2 is a graph showing the relationship between the free height of the rib and the amount of warpage of the outer flange in the end cap of the present invention. 3 is a front view of an end cap according to another embodiment of the present invention, and FIG. 4 is a perspective view of a conventional photosensitive strip container. Symbols in the figure: 1... tubular body member, 2... slot, 3... photosensitive strip, 4... end cap, 6...
...outer flange, 7...inner flange, 9...rib, 10...container, 11...notch portion.

Claims (1)

[Scope of utility model registration request] A container for holding the photosensitive strip 3,
It has a polygonal tubular member 1 which is open at both ends and has a slot 2 adjacent to one corner of the tubular member 1. Extending in all axial directions, the photosensitive strip 3
The slot 2 has a structure to keep the photosensitive strip 3 in the container light-tight, and has two moldings for closing each opening of the tubular member 1. In a photosensitive strip container having a cylindrical end cap 4, each said end cap 4 comprises an outer flange 6 and an inner flange 7 extending around its periphery and substantially uniformly spaced apart from each other. It has a polygonal engagement groove that engages with the opening edge of the tubular body member 1, and at least one rib 9 is provided on each side of the engagement groove, and the rib 9 is provided on the outer side. The length h from the edge of the flange 6 to the end surface of the rib is 3/4 or less of the depth of the engagement groove,
A photosensitive strip container characterized in that a notch 11 that fits into the rib 9 is formed on each side of the opening edge of the tubular member 1.