JP4443695B2 - Container with metal cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container with a metal cap that is sealed by being attached with a metal cap after contents such as carbonated drinking water are packed therein.
[0002]
[Prior art]
As a container with a metal cap (hereinafter referred to as “container” as appropriate) used for carbonated drinking water or the like, for example, there is one proposed in the prior application of the present inventor (Japanese Patent Application No. 11-147910). As shown in FIG. 5, the container 31 has a mouth portion 32 that is substantially cylindrical and opens upward, and is sealed and opened when a metal cap 33 is attached to and detached from the mouth portion 32. The mouth portion 32 is provided with a plurality of guide portions 34 extending in the circumferential direction while projecting in the outer diameter direction. The metal cap 33 protrudes in the inner diameter direction from a substantially circular top plate portion 35, a cylindrical portion 38 extending downward through a protruding portion 37 extending from the top plate peripheral portion 36 in the outer diameter direction, and a lower end portion of the cylindrical portion 38. It is formed more integrally with the plurality of locking portions 39. A substantially annular plate-like sealing material 40 made of a soft material such as polyethylene is provided on the back side of the top plate peripheral portion 36.
[0003]
When the metal cap 33 is attached to the mouth portion 32, the plurality of locking portions 39 of the metal cap 33 engage with the lower ends of the plurality of guide portions 34 of the mouth portion 32. Further, the sealing material 40 is pressed by the top plate peripheral edge portion 36, and the container 31 is sealed by being in pressure contact with the upper peripheral edge portion of the mouth portion 32 over the entire periphery.
[0004]
However, although very rarely, the container 31 may fall in a state where the internal pressure of the container 31 is higher than usual with an increase in the temperature of the carbonated drinking water that is the content. In this case, there is a possibility that the metal cap 33 collides with the floor surface at the top plate peripheral portion 36 protruding relatively outward, and the top plate peripheral portion 36 is deformed as indicated by a dotted line in FIG. Then, the seal material 40 is pressed in a direction where the seal material 40 is not applied, and a gap is generated by partially separating from the mouth portion 32, and carbonic acid may leak from the container 31 to the outside through the gap. Such a problem occurs not only when the container 31 is dropped, but also when the metal cap 33 hits a wall surface or the like due to vibration or the like during transportation of the container 31. Therefore, from the viewpoint of ensuring the quality of the contents, a container improved so as to maintain the sealing performance even in such a severe situation is desired.
[0005]
[Problems to be solved by the invention]
In view of such a background, an object of the present invention is to provide a container with a metal cap that can more reliably maintain a sealed state even when the metal cap collides with a floor surface or the like due to dropping or the like.
[0006]
[Means for Solving the Problems]
The present invention includes a substantially circular top plate portion, a cylindrical portion extending downward from the top plate peripheral portion of the top plate portion, a plurality of locking portions protruding in the inner diameter direction of the cylindrical portion, When a metal cap provided with a sealing material on the back side is attached to a substantially cylindrical mouth portion provided with a plurality of guide portions extending in the circumferential direction while protruding in the outer diameter direction, the lower end of the guide portion And a metal cap with a metal cap that is sealed when the sealing member is pressed by the peripheral edge of the top plate and pressed against the peripheral edge of the upper end of the mouth. .
[0007]
A container with a metal cap of the present invention for solving the above problems is provided with a pair of projecting portions projecting outwardly on the top plate portion and the cylindrical portion of the metal cap, and the top plate peripheral portion is provided on both sides. It is characterized by being formed at a position that is depressed with respect to the surface that abuts the protruding portion .
[0008]
When the container having the above configuration is dropped in a sealed state on the floor surface, the pair of protrusions of the metal cap first collide with the floor surface, and the peripheral edge of the top plate does not directly collide with the pair of protrusions. The peripheral edge of the top plate that is relatively depressed is protected from the impact of dropping. Therefore, the deformation of the peripheral edge of the top plate is prevented / suppressed, and it is possible to prevent the sealing material pressed against the peripheral edge of the upper end of the container mouth from being pressed or broken by the peripheral edge of the top plate. For this reason, the sealing property of the container is maintained even after dropping, and the contents are prevented from being deteriorated due to the leaching of the contents out of the container or the intrusion of air into the container.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a container with a metal cap of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory configuration diagram of the main part of the container according to the first embodiment of the present invention, FIG. 2 is an explanatory configuration diagram of the main part of the container according to the second embodiment of the present invention, and FIG. It is explanatory drawing of the drop test of the container with a cap, FIG. 4 is explanatory drawing before and behind the drop test of the principal part of the container of this embodiment.
[0010]
A container 1 according to the first embodiment of the present invention shown in FIG. 1 has a substantially cylindrical mouth portion 2 opened upward, and is sealed and opened by attaching a metal cap 3 to the mouth portion 2. The mouth portion 2 is provided with a plurality of guide portions 4 extending in the circumferential direction while protruding in the outer diameter direction. The metal cap 3 includes a top plate portion 5, a cylindrical portion 8 extending downward from the top plate peripheral portion 6 through the protruding portion 7 in the outer diameter direction over the entire circumference, and a plurality of protruding portions in the inner diameter direction from the lower end portion of the cylindrical portion 8. The locking portion 9 is integrally formed. In addition, the top plate portion 5 is formed with a protruding portion 10 that protrudes upward leaving the central portion, and the top plate peripheral edge portion 6 is recessed relative to the surface P that contacts the pair of protruding portions 7 and 10. is doing. On the back side of the top plate portion 5, a sealing material 11 made of a soft member such as polyethylene and closing the mouth portion 2 is provided.
[0011]
When the metal cap 3 is attached to the mouth portion 2, the plurality of locking portions 9 of the metal cap 3 engage with the lower ends of the plurality of guide portions 4 of the mouth portion 2. Further, the sealing material 11 is pressed by the peripheral edge 6 of the top plate, and the container 1 is sealed by being pressed against the peripheral edge of the upper end of the mouth 2 over the entire periphery.
[0012]
The container 1 according to the second embodiment of the present invention shown in FIG. 2 is illustrated in that the protruding portion 10 is formed by protruding the top plate portion 5 entirely upward leaving the top plate peripheral portion 6. 1 is different from the container 1 of the first embodiment shown in FIG. Since the container 1 of both embodiment is the same structure except for this, the same code | symbol is used and description is abbreviate | omitted. Also in 2nd Embodiment, the top-plate peripheral part 6 is depressed relatively with respect to the surface p which contact | abuts a pair of protrusion parts 7 and 10. FIG.
[0013]
Here, regarding the sealing performance of the container of the embodiment, as shown in FIG. 3, the container is dropped from a height of about 30 cm with respect to a block having an inclined surface x of about 15 °, and the metal cap is attached. The result of testing by colliding with the inclined surface x will be described. The container 1 was filled with only 500 ml of 3.4% carbonated water, the temperature of the carbonated water was 37 ° C., and the internal pressure of the container 1 was 4 [kgf / cm ² ]. The pressure resistance of the container 1 was set to 8.2 [kgf / cm ² ] or more, and a polyethylene sheet having a thickness of 0.9 mm was used as a sealing material. For comparison, a similar test was performed on the conventional container 31 shown in FIG.
[0014]
As described above with reference to FIG. 6, in the conventional container 31, the top plate peripheral edge portion 36 is deformed at the time of dropping, and the sealing material 40 is pressed and the sealing performance is not maintained. On the other hand, when the container 1 of the first embodiment is dropped on the floor surface x upside down in a sealed state, the protruding portion 10 of the metal cap 3 is deformed as shown by a dotted line in FIG. However, the top plate peripheral edge portion 6 that is depressed with respect to the surface p that contacts the pair of protruding portions 7 and 10 is not deformed and is protected from the impact of dropping. Accordingly, it is possible to prevent the sealing material 11 from being pressed in the direction in which the top plate peripheral edge 6 does not appear and to separate from the upper peripheral edge of the container 2, and the sealing performance of the container 1 is maintained even after dropping. I understood. Moreover, although not shown in figure, it was confirmed similarly about the container 1 of 2nd Embodiment that the top-plate peripheral part 6 was protected from the impact of the fall, and the sealing performance was maintained after the fall.
[Brief description of the drawings]
FIG. 1 is an explanatory configuration diagram of a main part of a container with a metal cap according to a first embodiment of the present invention. FIG. 2 is an explanatory configuration diagram of an essential part of a container with a metal cap according to a second embodiment of the present invention. 3] Explanatory drawing of a drop test of a container with a metal cap. [FIG. 4] Explanatory drawing before and after a drop test of a main part of the container with a metal cap of this embodiment. [FIG. Diagram [Fig. 6] Explanatory drawing before and after the drop test of the main part of a conventional container with a metal cap [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Container with metal cap, 2 ... Mouth part, 3 ... Metal cap, 4 ... Guide part, 5 ... Top plate part, 6 ... Top plate peripheral part, 7 ... Projection part, 8 ... Cylindrical part, 9 ... Locking part 10. Projection, 11 ... Sealing material

Claims (1)

A substantially circular top plate portion, a cylindrical portion extending downward from the top plate peripheral portion of the top plate portion, a plurality of locking portions protruding in the inner diameter direction of the cylindrical portion, and a seal on the back side of the top plate portion When a metal cap provided with a material is attached to a substantially cylindrical mouth portion provided with a plurality of guide portions extending in the circumferential direction while projecting in the outer diameter direction, the engagement is provided at the lower end portion of the guide portion. A container with a metal cap that is sealed by the stopper being locked, and the sealing material is pressed by the peripheral edge of the top plate and pressed over the entire periphery of the upper peripheral edge of the mouth,
Formed to the position where the metal cap of the pair of projecting portions projecting outwardly is provided between the top plate portion and the cylindrical portion, the top plate peripheral edge portion is recessed with respect to surface abutting on both protrusions A container with a metal cap characterized by being made .

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