JPH107161A - Fitting container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container having an excellent water leakage-preventing function and an excellent fitting force and improve the impact resistance of the container by forming the cross-sectional shape of a projected stripe into a keyhole shape comprising a rim and a substantially circular swollen portion provided at a top end thereof, providing a connection between the rim and the swollen portion in the form of a waist portion, and forming a recessed stripe provided on a lid into a shape substantially similar to that of the projected stripe. SOLUTION: A projected stripe 35 of a container main body 30 is formed into a so-called keyhole shape having a swollen portion 35b whose cross section is substantially circular and which is provided at a top end of a rim 35a provided at a substantially right angle with a flange 34. A waist portion 35c is formed at a connection of the swollen portion with the rim 35a. A recessed stripe 45 of a lid 40 has a size and a shape capable of being received by the projected stripe 35 in a pressure contact state without leaving any gap. Particularly, a swollen portion 45b of the recessed stripe 45 is so formed that it can be brought into close contact with an outer face of the swollen portion 35b of the projected stripe 35. Accordingly, when the projected stripe 35 is engaged with the recessed stripe 45, the swollen portions 35b and 45b are brought into spherical contact with each other, and no gap is formed by an uneven pressure contact face. Further, the engagement between the swollen portions 35b and 45b are securely kept by the locking between the waist portion 35c and a waist portion 45c of the recessed stripe 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting container for fitting and closing a lid and a container body by utilizing the elasticity of a synthetic resin.

[0002]

2. Description of the Related Art This type of fitting container is roughly classified into three types according to the form of fitting. A so-called outer fitting container, inner fitting container, and inner / outer fitting container.

In the simplest form of the outer fitting container, as shown in FIG. 4, a skirt 12 hanging from a flange 11 of a container body 10 is provided, and a skirt 22 hanging from a flange 21 of a lid 20 is attached to the container body 10. Of the skirt 12 so as to be pressed against the outer surface of the skirt 12. However, in this case, the lid 20 is easily detached because the skirts 12 and 22 are merely in contact with each other.
Usually, 3 is provided. Further, as shown in FIG. 5, a concave ridge 13a corresponding to the convex ridge 23a is provided to be engaged with each other to increase the fitting force.

[0004] However, in any case, when liquid is contained in the stored matter, there is almost no or incomplete water leakage prevention function,
Very often, the lid comes off due to the impact during handling such as transportation or exhibition.

[0006] As shown in FIG. 6, the inner fitting container is provided with a rim 12 a rising on the outer periphery of the flange 11 of the container body 10 so that the rim 22 a rising from the flange 21 of the lid 20 is pressed against the inner surface of the rim 12 a. It was done.
Also, as in the case of the outer fitting container, as shown in FIG.
In some cases, a concave ridge 13a is provided on 2a and a convex ridge 23a is provided on the rim 22a so as to engage with each other to increase the fitting force.

[0006] Such an inner fitting container is superior to the outer fitting container in water leakage prevention function, but is a face-to-face contact,
It is inevitable that a gap is formed with a slight error, and the contents are largely shaken due to rough handling, and leakage is likely to occur due to the inclination of the container. In FIG. 7 as well, the concave ridges 13a and the convex ridges 23a increase the fitting force, but the gap between them is rather widened due to the size mismatch between the two. The biggest disadvantage of the inner fitting container is that the lid is easily detached by an impact during handling. This is because the opening of the container body 10 is easily deformed because the height of the container body 10 is generally larger, and the holding force of the rim 12a is weak.

As shown in FIG. 8, the inner / outer fitting container is provided with a tapered ridge 12b on a flange 11 of a container body 10 and fitted into a tapered ridge 22b provided on a flange 21 of a lid 20. is there. In this case, the tapered ridges 12b and the tapered concave ridges 22b perform outer fitting of FIG. 4 on their outer side walls and inner fitting of FIG. 6 on their inner side walls. Further, as shown in FIG. 9, there is also a configuration in which a small concave ridge 13b is provided on the inner side wall of the convex ridge 12b, and a small convex ridge 23b is provided on the inner side wall of the concave ridge 22b. Although such an inner / outer fitting container has a high fitting force and a relatively high water leakage prevention function, it is a surface contact due to three sides forming the ridges 12b and the recesses 22b or a line contact by straight lines at the corners. It is very difficult to make a tight fit over the entire circumference of the container. This is essentially the same as the outer and inner fitting containers described above. Furthermore, in the inner / outer fitting container, since the inner and outer wall surfaces of the convex ridge 12b and the concave ridge 22b are opposed to each other, if one tries to make close contact, the other tends to separate, and the inner and outer surfaces can simultaneously make close contact. difficult. Further, although the fitting force is relatively excellent, the lid is often not detached so much that it is not so strong against vertical impact such as dropping.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fitting container which has a very excellent function of preventing water leakage, has a strong fitting force, and has extremely high impact resistance.

[0009]

In order to solve the above-mentioned problems, the present invention comprises inserting a convex strip provided on one of an outer periphery of an opening of a container body and an outer periphery of a lid into a concave strip provided on the other. In the container which engages with each other and fits the lid to the container body, the cross-sectional shape of the ridge is a keyhole shape comprising a rim and a substantially circular bulge provided at the tip thereof, and the rim and the bulge are formed. And a connecting portion with the conical portion, the concave streak has a substantially similar shape to the convex streak, and at least the bulging portions are elastically pressed against each other.

Since the bulges of the ridges and ridges are in spherical contact with no corners, the ridges are evenly pressed against each other to be in liquid tight contact with each other, and the constricted portions serve as stoppers, so that the fitting force is extremely high. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1 and FIG.
Has a bottom wall 31 and a side wall 32 rising from the periphery thereof, and an upper end of the side wall 32 is an opening 33. A flange 34 is provided on the outer periphery of the opening 33, and a ridge 35 is provided on the flange 34. The tab 36
Can be provided as needed.

A lid 40 is fitted to the container body 30. The lid 40 includes a top wall 41, a side wall 42 provided on the periphery thereof, and a flange 44 provided on the outer periphery of the side wall 42.
And a ridge 45 provided on the flange 44,
The convex ridge 35 of the container main body 30 is press-fitted into the concave ridge 45 and tightly fitted. The lid 40 has a so-called falling lid in which a side wall 42 rises as shown in the drawing, a so-called dropping lid in which a top wall 41 falls into an opening 33 of the container body 30, and a top wall 41 which is horizontal with a flange 44. And a top wall 41 having a plurality of irregularities.

The container body 30 and the lid 40 are made of a synthetic resin such as polypropylene, polystyrene, vinyl chloride, or polyester. Must have possible elasticity. Usually, it is manufactured by a molding method by vacuum molding or pressure molding or a combination thereof.

FIG. 3 is an enlarged view of the shapes of the ridges 35 and the ridges 45. As shown in FIG.
4 has a so-called keyhole shape in which a bulge 35b having a substantially circular cross section is provided at the tip of a rim 35a provided substantially at right angles to the rim 35a. The opposing surfaces of the rim 35a need not be parallel, and may have a tapered shape expanding upward or a tapering shape narrowing.
The bulging portion 35b has a circular shape including a perfect circle, an ellipse, an ellipse, a continuous circle having different curvatures, and the like, and a constricted portion 35c is formed at a connection portion with the rim 35a.

The concave ridge 45 of the lid 40 has a shape and a size that can be pressed against the convex ridge 35 without any gap and accommodated therein. In particular, the bulging portion 45b needs to be formed so as to be as close as possible to the outer surface of the bulging portion 35b of the ridge 35.
In this case, since the bulging portions 35b and 45b are both substantially circular, it is relatively easy to mold the whole surface into close contact unlike a shape having a corner such as a trapezoid.

It is preferable that the rims 35a and 45a are also in close contact with each other.
It may be slightly larger. That is, there may be a state in which a slight gap is formed in the vertical direction between the flange 34 and the flange 44 in a state where the convex ridge 35 and the concave ridge 45 are engaged.

When the ridges 35 and the concave ridges 45 are engaged as described above, the contact between the bulging portions 35b and 45b becomes spherical contact.
Since there is no corner portion, there is no floating due to a slight manufacturing error, the pressing force acts evenly over the entire circumference of the bulging portion, and there is no gap due to uneven pressing force. Further, the engagement between the constricted portions 35c and 45c causes the bulged portion 35
This firmly holds the engagement between b and 45b, maintains a close contact with each other, and serves as a strong stopper.

The convex ridge 35 and the concave ridge 45 are connected to the container body 3.
0 and the lid 40 may be provided. That is, a convex ridge can be provided on the lid, and a concave ridge can be provided on the container body. In this case, both the ridge and the ridge are provided downward.

The planar shapes of the container body and the lid are not limited to circular shapes. The shape may be any of an ellipse, an oval, and a polygon such as a quadrangle. In the case of a polygon, the corner portion may be formed in a smooth radius without being sharpened.

Furthermore, there can be a container body 30 or a lid 40 without flanges 34,44.

Examples and comparative examples will be described below.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The shape shown in FIG.
Fifty round 0cc polystyrene containers were prepared. The ridge of the container body has a height of 8 mm, a rim width of 3.75 mm, a radius of a circular bulge of 2.375 mm, and a concave ridge of the lid of 7.5 mm in height, a rim width of 4.25 mm, and a round shape. The radius of the bulge was 2.625 mm.

The container body was filled with 100 cc of water, the lid was firmly fitted, and the container was dropped from the height of 2 m to the cement floor with the volume laid down.

[0025]

Comparative Example Fifty containers similar to those in the example were prepared, except that the ridge of the container body was trapezoidal, 8 mm in height and Width in the upper side was 5.
The width of the lower side was 25 mm, the width of the lower side was 3.75 mm, the concave streak of the lid was also trapezoidal, the height was 7.5 mm, the width of the upper side was 5.25 mm, and the width of the lower side was 4.25 mm.

When a test similar to that of the example was performed, 38 pieces of the lid came off and 42 pieces of water leaked.

[0027]

According to the present invention, as described above, a key-shaped ridge that forms a bulge with a substantially circular tip is provided on the outer periphery of the opening of the container body, and the same shape as the ridge is provided on the outer periphery of the lid. Provide a concave stripe,
Since the convex stripes are engaged with the concave stripes, the bulges are in spherical contact with the bulges, so that no gap is formed and the liquid-tightness is excellent, and a constriction is formed between the bulges of the ridges and the lower part. Are formed, the constricted portions engage with each other to increase the fitting force, prevent the irregular strips from coming off, and obtain a fitting container with extremely high impact resistance.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a fitting container according to the present invention.

FIG. 2 is a plan view of a container body.

FIG. 3 is a partially enlarged longitudinal sectional view of a fitting portion.

FIG. 4 is a longitudinal sectional view showing an example of a conventional outer fitting container.

FIG. 5 is a partially enlarged longitudinal sectional view showing a modification of the above.

FIG. 6 is a longitudinal sectional view showing an example of a conventional inner fitting container.

FIG. 7 is a partially enlarged longitudinal sectional view showing a modification of the above.

FIG. 8 is a longitudinal sectional view showing an example of a conventional inner / outer fitting container.

FIG. 9 is a partially enlarged longitudinal sectional view showing a modification of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Container main body 11 Flange 12 Skirt 12a Rim 12b Tapered convex 13a Concave 13b Small concave 20 Lid 21 Flange 22 Skirt 22a Rim 22b Tapered concave 23 Projection 23a Projected 23b Small convex 30 Container main body 31 Bottom wall 32 Side wall 33 Opening 34 Flange 35 Convex ridge 35a Rim 35b Swell 35c Neck 36 Tab 40 Cover 41 Top wall 42 Side wall 44 Flange 45 Concave 45a Rim 45b Swell 45c Neck

Claims (1)

[Claims] 1. A ridge provided on one of an outer periphery of an opening of a container main body and an outer periphery of a lid is inserted into a concave ridge provided on the other side to engage with each other to fit the lid on the container main body. In the container, the cross-sectional shape of the ridge is a keyhole shape composed of a rim and a substantially circular bulge provided at the tip of the rim, the connection between the rim and the bulge is a constriction, and the concave ridge is A fitting container characterized in that it has a substantially similar shape of a ridge, and at least bulges are elastically pressed against each other.