JPH11100051A - Container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container in which gas generated within the container can be discharged, expansion of the container can be restricted and a changing of only a part of a die enables it to be easily formed. SOLUTION: This container is comprised of a main body of container made of synthetic resin having a pouring port 1 at the upper end of a neck 3, and a lid 4 made of synthetic resin having an inner ring 42 inside of it and forcedly fitted outside to the neck 3 by an external force. The container is constituted such that a protruding curved surface 1a is formed at an inner circumferential surface of the pouring port 1 and then the inner ring 42 is abutted against the curved surface 1a when the lid is closed. In this case, a part of the outside portion at the upper end of the neck 3 is provided with a thick-walled portion 31, and a part of the curved surface 1a corresponding to the thick-walled portion 31 is provided with a recess part 21 for use in releasing gas which is formed under a cooling deformation when the main body of the container is cooled in case of its molding operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container comprising a container main body and a lid externally fitted to the neck of the container main body.

[0002]

2. Description of the Related Art As a conventional container, a synthetic resin container main body having a spout at the upper end of a neck is forcibly externally fitted to the neck of the container main body by an external force. 2. Description of the Related Art A container of a simple openable / closable container including a synthetic resin lid is known. Often, an inner ring is provided.

However, if the flow of gas at the spout of the container is completely shut off, gas is generated from the stored material during storage, and the container expands due to changes in temperature and atmospheric pressure, thereby deteriorating the commercial value. May be. Therefore, in order to eliminate such inconvenience, a container provided with a degassing mechanism is used as necessary, and as such a container, for example, an inner gas is discharged so that gas generated inside is discharged. There is known a container in which a concave portion is formed in a part of a curved surface portion where a ring abuts, and a gap is formed between the concave portion and the inner ring to such an extent that gas flows.

However, in such a conventional container, a projection corresponding to the shape of the recess is formed in the molding die in order to form the recess, so that the shape of the mold is complicated. And high precision is required for the production of the molding die, and the existing die for forming a container without the depressed portion for degassing is processed to have a depressed portion for degassing. It could not be used as a mold for containers.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a container which is capable of discharging gas generated inside to suppress expansion of the container and which can be easily formed only by changing a part of a mold. is there.

[0006]

According to the first aspect of the present invention,
A synthetic resin container body having a spout at the upper end of the neck, and a synthetic resin lid which is provided with an inner ring on the inner side and is forcibly fitted to the neck by an external force; In a container having a projecting curved surface formed on the inner peripheral surface thereof and the inner ring abutting on the curved surface when the lid is closed, a thick portion is provided on a part of an outer portion of an upper end of the neck. A part of the curved surface part corresponding to the thick part is provided with a gas venting concave part formed by cooling deformation at the time of cooling when molding the container body. The object has been achieved by providing a container.

According to a second aspect of the present invention, an annular groove corresponding to the curved surface portion is formed in an outer portion of the upper end of the neck portion,
The object has been achieved by providing the container according to claim 1, wherein the thick portion is provided in the annular structure.

According to a third aspect of the present invention, the above object has been achieved by providing a container according to the first or second aspect, which is a container for accommodating powder and granules. is there.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the container of the present invention will be described with reference to the drawings. Here, FIG. 1 is an exploded perspective view showing the container of this embodiment partially omitted, FIG. 2 is a front view showing the container of this embodiment partially cut away, and FIG. Side view seen from A direction,
FIG. 4 is a cross-sectional view showing a main part of the container according to one embodiment of the present invention (a cross-sectional view taken along the line AA in FIG. 3 in a state where a lid is externally fitted to a neck), and FIG. The figure which shows the clearance gap formed between an inner ring and a recessed part (BB sectional drawing of FIG. 4).
It is.

As shown in FIGS. 1 to 5, the container of this embodiment comprises a container body 2 made of a synthetic resin having a spout 1 at the upper end of a neck 3 and an inner ring 42 inside the container. And a lid 4 made of synthetic resin forcibly fitted to the outside by an external force.
a is formed so that the inner ring 42 comes into contact with the curved surface portion 1a when the lid is closed. A thick portion 31 is provided on a part of the outer portion 3a at the upper end of the neck portion 3,
A part of the curved surface portion 1a corresponding to the thick portion 31 is provided with a depressed portion 21 for venting gas formed by cooling deformation during cooling when the container body 2 is molded.

Hereinafter, the container of the present embodiment will be described in detail. The container main body 2 is a hollow container made of a synthetic resin formed by a normal blow molding method, and has a storage portion in which powder, granules, tablets, and the like can be stored. A neck portion 3 having a spout 1 at an upper end for taking out a powder or the like in the storage portion extends. On the inner peripheral surface of the spout 1, a projecting curved surface portion 1 a facing upward in the center of the spout 1 is formed as shown in FIG. 4.

As shown in FIGS. 1 and 2, the lid 4 has a substantially rectangular shape in a flat cross section including a top surface portion 40 and a peripheral side surface 41. An inner ring 42 protrudes inward. When the lid 4 is forcibly fitted to the neck 3 of the container body by an external force, the tip of the inner ring 42 comes into contact with the curved surface 1a. Such a configuration is similar to that of a conventional simple opening and closing container having an inner ring.

As shown in FIGS. 3 and 4, an annular groove 32 for forming the curved surface portion 1a is provided in the outer portion 3a at the upper end of the neck portion 3 in the container of the present embodiment. The thick portion 31 is provided in the annular structure 32. The thick portion 31 is used to form the concave portion 21 in the curved surface portion 1a by utilizing cooling deformation during cooling, and has a substantially rectangular shape when viewed from the side as shown in FIG. As shown in the figure, the upper surface 32a and the vertical surface 32b forming the concave groove 32 are connected to each other, and the rear end thereof is an inclined surface 31a substantially perpendicular to the direction of the curved surface 1a. The thick portion 31 is formed by providing a notch in a protruding portion for forming the annular groove 32 in a molding die. The width W (see FIG. 3) of the thick portion 31 is preferably 0.3 mm to 1.0 mm from the viewpoint of forming a preferable gap for discharging the gas and preventing leakage of the contents such as powders and granules. .

In the container of this embodiment, as shown in FIG. 1, by providing such a thick portion 31, a part of the curved surface portion 1a corresponding to the thick portion 31 is provided with a gas vent. The recess 21 is formed. That is, the concave portion 2
1 is a sink portion formed at the time of cooling during molding by providing the thick portion 31. Above recess 2
1 is the curved surface portion 1a as shown in FIGS.
In the center, there is a valley portion 21a that is substantially perpendicular to the circumferential direction, and the curved surface portions 1a on both sides in the circumferential direction are inclined toward the valley portion 21a. The recess 21 forms a gap S for venting gas between the inner ring 42 and the curved surface 1a when the lid is closed. FIG.
FIG. 4 is a diagram showing a cross section of a curved surface along the outer surface of the inner ring 42.

As shown in FIGS. 1 and 2, the lid 4 of the container of this embodiment has side walls 41a, 41a opposed to each other in the length direction of the lid 4 and the width direction of the lid 4 in the width direction. Upper and lower two-stage horizontal ribs 5a, 5b are protruded inwardly from the opposing side wall surfaces 41b, 41b, respectively, and the neck 3 of the container body 2 in the container of the present embodiment has the lid 4 Upper and lower horizontal grooves 6a and 6b corresponding to the upper and lower horizontal ribs 5a and 5b are formed.
The neck portion 3 has a rectangular tube portion 7 having a substantially octagonal flat cross-section and having a corner surface 70 formed by cutting each corner of a quadrilateral and a side wall surface 71 existing between the corner surfaces 70. And
The upper and lower horizontal grooves 6 are formed on the side walls 71a, 71a facing each other in the length direction and the side walls 71b, 71b facing each other in the width direction.

When the lid 4 is mounted on the neck 3 and pressed, the horizontal ribs 5a and 5b are fitted into the horizontal grooves 6a and 6b, respectively, and the restoring elastic force of the lid 4 and the container body 2 is applied. The fitted state is maintained mainly by the restoring elastic force of the lid 4.

In this fitting state, the tip of the inner ring 42 is in contact with the curved surface portion 1a over substantially the entire circumference, so that even if the container is inclined or inverted, the powder particles contained therein are Body does not leak. However, the recess 21
In the portion where the inner ring 42 is formed,
A slight gap is formed between the front end of the lens and the curved surface section 1a, and gas generated inside is discharged through the gap.

At the base end of each corner surface 70,
A step portion 72 for opening the lid is provided, and the lid 4 and the lid 4 are formed using the force generated when the lid 4 is rotated and the lower end 43 of the opening of the lid 4 climbs on the step. The detachment from the container body 2 is assisted.

As the material for forming the lid 4 in the container of the present embodiment, generally known various synthetic resins can be used. From the viewpoints of easiness of elastic deformation, sealing, and easiness of opening and closing operations, polypropylene and polyethylene are used. And the like, especially polypropylene. As a material for forming the container body 2, various kinds of generally known synthetic resins can be used. However, by providing the thick portion 31, the concave portion 2 having a certain shape can be formed.
From the viewpoint of stably forming 1 in a plurality of containers, in particular, polypropylene and polyethylene can be preferably used.

According to the container of the present embodiment, the concave portion 21 for venting gas is provided in a part of the curved surface portion 1a.
Even if gas is generated from the contents during storage, expansion of the container can be prevented by discharging the gas to the outside through a gap formed between the inner ring 42 and the inner ring 42.
Therefore, inconveniences such as a reduction in commercial value due to expansion of the container and a danger due to an increase in internal pressure are prevented. Further, since the gas can flow through the gap, expansion or dent of the container due to a change in pressure or temperature does not occur.
In particular, the container of the present embodiment is suitable as a container for powder and granules. Even if the container is inverted, the powder does not leak, but the gas generated from the powder is well discharged to the outside. From this point of view, the concave portion 21 and the inner ring 42
Between 100 μm and 50 μm.
It is preferably 0 μm.

Further, in the container of the present embodiment, the concave portion 21 is provided with the thick portion 31 on the outer portion 3a at the upper end of the neck portion 3 and formed by cooling deformation during cooling when the container body 2 is formed. Because the mold for molding,
Instead of the protruding portion, a concave portion corresponding to the thick portion 31 may be formed. Therefore, it is easy to manufacture a mold for molding a container, and a mold for a container having no degassing mechanism is subjected to a cutting process for forming the thick portion 31, and the container of the present embodiment is formed. It can be used as a mold for

Further, since the thick portion 31 is provided in the annular groove 32 corresponding to the curved surface portion 1a, machining of the die is simple. That is, a protruding portion for forming the annular groove 32 is formed in the mold, but the recess 21 can be formed only by cutting out a part of the protruding portion. In addition, since the thick portion 31 has the above-described configuration, the recess 21 having a preferable configuration can be stably formed.

In the container of the present embodiment, the fitting of the lid 4 and the neck 3 is maintained by the fitting of the horizontal ribs 5 and the horizontal grooves 6, so that the lid is The fitting state between the body 4 and the container body neck 3 is extremely strong, and the lid is unlikely to come off even when the container is dropped sideways.
On the other hand, by slightly rotating or deforming the lid 4, the fitted state between the lid 4 and the container body neck 3 can be easily released, and the lid opening operation is extremely simple.

Further, according to the container of the present embodiment, the stepped portion 72 is provided at the base end of the corner surface 70, and the opening lower end portion 4 of the lid 4 is generated by rotating the lid 4.
Since the detachment of the lid 4 and the container body 2 is assisted by utilizing the force when the lid 3 climbs on the step 72, the lid 4 is rotated by rotating the lid 4. The lid 4 can be slowly removed from the neck 3. Therefore, even if the recess 21 is closed and the inside is filled with gas, the inside gas can be gradually released while suppressing the lid, thereby preventing ejection of the contents by the filled gas. can do.

The container which is one embodiment of the container according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the present invention. . For example, in the container of the above-described embodiment, the thick portion 31 and the corresponding concave portion 21 are provided at only one location, but they may be provided at two or more locations. Further, the position where the thick portion 31 is provided and the form of the thick portion may be other positions and forms as long as the concave portion 21 can be formed in the curved surface portion 1a with which the inner ring abuts. .

The mechanism for fitting the container body 2 and the lid 3 is such that the inner ring 4 is attached to the curved surface 1a of the container body.
There is no particular limitation on the mechanism as long as the cover 4 can be fitted to the neck 3 so that the two abut against each other, and various generally known fitting methods can be used. For example, contrary to the container in the above embodiment, a horizontal rib is formed in the neck portion 3 and a horizontal groove that fits in the horizontal rib is formed in the lid 4, or a combination of the horizontal rib and the horizontal groove is formed. Instead, a combination of a circular protrusion and a circular recess may be used. Further, the neck 3 may not have the rectangular tube portion 7 having a substantially octagonal flat cross section, and may have a rectangular cross section, a circular shape,
It may be elliptical or the like.

The inner ring 42 may be formed in an annular shape such as a substantially rectangular shape other than a circular shape, an elliptical shape, or the like, and the protruding height thereof can be appropriately determined. Also, the thick portion 31 and the recess 21 formed by providing the thick portion 31 are also configured such that a gas flows between the distal end portion of the inner ring 42 and the curved surface portion 1a, and the content is increased. Various forms different from those in the above-described embodiment can be used as long as gaps can be formed so as to prevent the flow of the powder or the like. Furthermore, it goes without saying that the shapes, dimensions, and the like of the other parts of the container of the present invention can be appropriately changed without departing from the spirit of the present invention.

[0028]

As is apparent from the above description, according to the present invention, the gas generated inside can be discharged to suppress the expansion of the container, and it is easy to change only a part of the mold. Can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a container according to an embodiment of the present invention with a part thereof omitted;

FIG. 2 is a front view showing the container shown in FIG. 1 with a part cut away.

FIG. 3 is a side view of the neck of the container of FIG. 1 as viewed from the direction of the arrow in FIG. 1;

FIG. 4 is a cross-sectional view showing a main part of a container according to an embodiment of the present invention.

FIG. 5 is a view showing a gap formed between an inner ring and a recess in a container according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spout part 1a Curved surface part 2 Container main body 21 Concave part 3 Neck part 31 Thick part 32 Annular groove 4 Lid body 40 Top part 41 Peripheral wall surface 41a, 41b Side wall surface which constitutes peripheral wall surface 42 Inner ring 5 Horizontal rib 6 Horizontal groove 7 Square tube portion 70 Corner surface 71a, 71b Side wall surface constituting square tube portion 72 Stepped portion

Claims (3)

[Claims] 1. A synthetic resin container body having a spout at the upper end of a neck, and a synthetic resin lid body provided with an inner ring inside and forcibly fitted to the neck by an external force. In a container in which a projecting curved surface portion is formed on an inner peripheral surface of the spout portion and the inner ring comes into contact with the curved surface portion when the lid is closed, a part of an outer portion of an upper end of the neck portion is provided. A thick portion is provided, and a concave portion for degassing formed by cooling deformation at the time of cooling when molding the container body is provided in a part of the curved surface portion corresponding to the thick portion. A container, characterized in that: 2. The annular structure according to claim 1, wherein an annular groove corresponding to the curved surface portion is formed in an outer portion of an upper end of the neck portion, and the thick portion is provided in the annular structure. container. 3. The container according to claim 1, wherein the container is a container for storing a granular material.