JP2565569Y2 - Container cap - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container cap.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional container cap. The cap 40 is attached to the mouthpiece 6 of the container 1.
The cap 40 is fitted with a screw.
An annular groove 45 is formed in the outer periphery of the upper surface of the packing 18 fitted in the inside.
And an O-ring 46 is fitted into the annular groove 45.

[0003] When the cap 40 is rotated and tightened, the packing 18 is brought into contact with the packing 18 and the cap 4.
0 is elastically pressed against the upper surface of the barrel 6 by an O-ring 46 fitted between the top plates 34 of the cylinder 6 and the barrel 6 and the packing 18.
Seal between.

[0004]

In the conventional cap 40 shown in FIG. 4, the packing 18 is elastically pressed against the upper surface of the barrel 6 by an O-ring 46, and the gap between the barrel 6 and the packing 18 is formed. It seals well and is excellent.

However, since the cap 40 compresses the O-ring 46 to generate elasticity,
It is necessary to separately form the O-ring 46 with a material having high flexibility.

Since the O-ring 46 is rich in flexibility as described above and is compressed, if the cap 40 is tightened for a long period of time, plastic deformation occurs relatively quickly and elasticity is reduced. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its technical object to provide a cap capable of elastically pressing a packing against a mouthpiece of a container to be a cap whose elasticity does not decrease. I do.

[0008]

According to the present invention, there is provided a cylindrical body 12 which can be fitted to the mouth tube portion 6 of the container 1, and an inwardly extending flexible bullet is provided on the upper inner peripheral edge of the cylindrical body 12. A plate 14 is provided,
A plate-shaped packing 18 is fitted into the inside of the cylindrical body 12, and a lower surface of a peripheral portion 20 of the packing 18 is provided with a contact surface 21 that is in contact with an upper surface of the mouthpiece portion 6.
8, a fitting portion 22 is provided near the peripheral portion 20, and the tip of the elastic plate 14 is fitted into the fitting portion 22, and the elastic plate 1
4 was formed so as to abut on the upper surface of the peripheral portion 20 of the packing 18 to form a container cap.

[0009]

According to the present invention, the tip of the elastic plate provided on the upper inner peripheral edge of the cylindrical body is fitted to the fitting portion provided near the peripheral portion of the packing to hold the packing.

When the cylindrical body 12 is fitted to the mouthpiece 6 of the container 1, the elastic plate 14 is bent, and the tip of the elastic plate 14 is
8 presses the upper surface of the peripheral portion 20, and the contact surface 21 on the lower surface of the peripheral portion 20 of the packing 18 elastically presses against the mouthpiece 6 of the container 1.

Since the elastic plate 14 is not compressed, it is possible to select a material which is rigid and hardly plastically deformed even if it is bent.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the present invention. In this embodiment, the mouthpiece 6 of the synthetic resin container 1 is used.
It is to be fitted to.

The container 1 is provided with a male screw 7 on a mouthpiece portion 6, and as shown in FIGS. 3 and 1, a small projection 3, an engagement recess 5 and a large projection 4 are formed on the outer periphery of a shoulder portion 2. It is provided continuously in the direction.

The cylindrical body 1 fitted to the mouth tube portion 6 of the container 1
2 is made of synthetic resin and has a female screw 13 provided inside. 2 extending inward and obliquely downward to the upper inner peripheral edge of the cylindrical body 12.
Zero flexible elastic plates 14 are provided integrally with the cylindrical body 12.

A disk-shaped packing 18 made of synthetic resin is fitted inside the cylindrical body 12. Near the peripheral portion 20 of the packing 18, a short cylindrical hanging portion 19 is provided.
Are integrally formed. At the lower end of the hanging portion 19, an annular peripheral portion 20 extending in the horizontal direction is provided.

On the outer periphery of the hanging portion 19, a fitting portion 22 formed as an annular groove is provided. The tip of the elastic plate 14 is fitted to the fitting portion 22 of the packing 18, and the distal end of the elastic plate 14 is formed so as to abut the upper surface of the peripheral portion 20 of the packing 18.

An outwardly extending flange 26 is integrally provided at the lower end of the cylindrical body 12.
An outer cylinder 27 extending upward and downward is integrally provided on the outside of the outer cylinder.
The projections 28 are formed so as to be fitted into and engaged with the engaging recesses 5 of the shoulder 2.

A jacket 33 made of synthetic resin provided with a top plate 34 is externally fitted to the outer cylinder 27, and is turned by a knurl formed on a lower outer surface of the outer cylinder 27 and a lower inner surface of the jacket 33. It is immovably fitted.

The cap of the container of this embodiment is
The tip of the elastic plate 14 provided on the upper inner peripheral edge of the
The packing 18 is held by fitting into a fitting portion 22 provided on the outside of the hanging portion 19.

Hereinafter, the operation of the cap will be described. First, the cylindrical body 12 is externally fitted to and screwed into the mouthpiece portion 6 of the container 1, and when the coating tube 33 is rotated, the contact surface 21 of the packing 18 comes into contact with the upper surface of the mouthpiece portion 6.

When the coating cylinder 33 is further rotated, the outer cylinder 2
7 are provided on the inside of the lower part of the container 1,
, And the projections 28 stop by hitting the large projections 4 of the shoulder 2 and held in the engagement recesses 5 to hold the cap in that position.

Then, the elastic plate 14 presses the peripheral portion 20 of the packing 18, and the contact surface 21 of the packing 18 is
The mouthpiece portion 6 is hermetically sealed by elastically pressing the upper surface of the mouthpiece. In the above-described embodiment, the 20 elastic plates 14 are provided.
It is also possible to increase or decrease the number of four, or to form the elastic plate 14 into a continuous annular shape in the lateral direction. When the elastic plate 14 is formed to be continuous in the lateral direction, the thickness of the elastic plate 14 is formed thin.

In the above embodiment, the elastic plate 14 is connected to the cylindrical body 12.
The elastic plate 14 may be formed of a metal plate separate from the cylindrical body 12. That is, a metal annular plate is formed, an elastic plate extending inward from the inner peripheral edge of the annular plate is integrally provided, and the annular plate is formed so as to be attached to the cylindrical body 12, or by insert molding,
An annular plate is formed by being embedded in the cylindrical body 12. As described above, when the elastic plate 14 is made of metal, the elasticity of the elastic plate 14 can be prevented from deteriorating.

[0024]

According to the present invention, the peripheral portion 20 of the packing 18 is pressed by the elastic plate 14 provided on the cylindrical body 12 so that the contact surface 21 is pressed against the upper surface of the mouthpiece 6. The packing 18 can be elastically pressed against the mouthpiece 6 of the container 1.

Since the elastic plate 14 is elastically pressed by bending and is not compressed, it can be formed of a rigid material and can maintain elasticity for a long time.

[Brief description of the drawings]

FIG. 1 is a half cut longitudinal sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of a cylindrical portion of the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a portion of a shoulder according to an embodiment of the present invention;

FIG. 4 is a longitudinal sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 6 Mouth cylinder part 12 Cylindrical body 14 Elastic plate 18 Packing 20 Peripheral part 21 Contact surface 22 Fitting part

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylindrical body 12 which can be fitted to a mouthpiece 6 of a container 1.
A flexible elastic plate 14 extending inward is provided at the upper inner peripheral edge of the cylindrical body 12, and a plate-like packing 18 is fitted inside the cylindrical body 12, and a peripheral portion of the packing 18 is provided. 2
Abutment surface 21 that abuts on the lower surface of
Is provided, and a fitting portion 22 is provided near the peripheral portion 20 of the packing 18. The tip of the elastic plate 14 is fitted into the fitting portion 22, and the distal end of the elastic plate 14 is Of the container formed so as to contact the upper surface of the peripheral portion 20 of the container.