JPH0572749U - Container cap - Google Patents

Abstract

(57) [Abstract] [Purpose] A cap that allows the packing 18 to be elastically pressed against the mouth tube portion 6 of the container 1 is a cap whose elasticity does not decrease. [Structure] An inwardly extending bullet plate 14 is provided on the inner peripheral edge of the upper portion of the tubular body 12, and the tip of the bullet plate 14 is fitted into a fitting portion 22 of a packing 18 fitted inside the tubular body 12, The tip portion of the plate 14 presses the peripheral edge portion 20 of the packing 18 so that the contact surface 21 of the packing 18 is pressed against the upper surface of the mouth tube portion 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a container cap.

[0002]

[Prior Art]

 Conventionally, there is a cap for a container as shown in FIG. The cap 40 is fitted into the mouth tube portion 6 of the container 1 with a screw, and an annular groove 45 is provided on the outer periphery of the upper surface of the packing 18 fitted in the cap 40. The O-ring 46 is inserted in the.

When the cap 40 is rotated and tightened, the packing 18 is elastically pressed against the upper surface of the mouth tube portion 6 by the O-ring 46 fitted between the packing 18 and the top plate 34 of the cap 40, The space between the mouth cylinder 6 and the packing 18 is sealed.

[0004]

[Problems to be solved by the device]

 In the conventional cap 40 shown in FIG. 4, the packing 18 is elastically pressed against the upper surface of the mouth cylinder portion 6 by the O-ring 46, and the space between the mouth cylinder portion 6 and the packing 18 is well sealed. Are better.

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 highly flexible material.

Since the O-ring 46 has high flexibility and is compressed as described above, when the cap 40 is tightened for a long period of time, the O-ring 46 undergoes plastic deformation relatively quickly and has elasticity. descend.

The present invention has been made in view of the above matters, and it is a technical problem to make a cap that can elastically press the packing against the mouth tube portion of the container without changing the elasticity. And

[0008]

[Means for Solving the Problems]

 The present invention provides a tubular body 12 that can be fitted into the mouth tubular portion 6 of the container 1, and a flexible bullet plate 14 extending inward is provided on the inner peripheral edge of the upper portion of the tubular body 12, A plate-like packing 18 is fitted into the inside of the packing 18, and a lower surface of the peripheral edge portion 20 of the packing 18 is provided with a contact surface 21 that abuts on the upper surface of the mouth tube portion 6, and the packing 18 is provided near the peripheral edge portion 20 of the packing 18. A fitting portion 22 is provided, the tip of the bullet plate 14 is fitted into the fitting portion 22, and the tip of the bullet plate 14 is formed so as to abut on the upper surface of the peripheral portion 20 of the packing 18. And used as a container cap.

[0009]

[Action]

 According to the present invention, the tip of the elastic plate 14 provided on the inner peripheral edge of the upper portion of the cylindrical body 12 is fitted to the fitting portion 22 provided near the peripheral edge portion 20 of the packing 18 to hold the packing 18.

When the tubular body 12 is fitted into the mouth tubular portion 6 of the container 1, the elastic plate 14 bends and the tip of the elastic plate 14 presses the upper surface of the peripheral edge portion 20 of the packing 18, and the peripheral edge portion of the packing 18 is pressed. The contact surface 21 on the lower surface of 20 elastically presses against the mouth tube portion 6 of the container 1.

Since the elastic plate 14 is not compressed, it is possible to select a material that has rigidity and is less likely to undergo plastic deformation even when it is bent.

[0012]

【Example】

 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, it is fitted in the mouth tube portion 6 of the container 1 made of synthetic resin.

The container 1 is provided with a male screw 7 on the mouth tube portion 6, and as shown in FIGS. 3 and 1, a small protrusion 3, an engaging recess 5 and a large protrusion 4 are provided on the outer circumference of the shoulder portion 2. It is provided continuously in the direction.

The tubular body 12 fitted into the mouth tubular portion 6 of the container 1 is made of synthetic resin and has an internal thread 13 provided therein. On the inner peripheral edge of the upper part of the cylinder 12, 20 flexible elastic plates 14 extending obliquely inward are provided integrally with the cylinder 12.

A disk-shaped packing 18 made of synthetic resin is fitted inside the cylindrical body 12. A short cylindrical hanging portion 19 is integrally formed near the peripheral edge portion 20 of the packing 18. An annular peripheral edge portion 20 extending in the horizontal direction is provided at the lower end of the hanging portion 19, and the lower surface of the peripheral edge portion 20 is an abutting surface 21 that abuts the upper surface of the mouth cylinder portion 6.

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

A flange portion 26 extending outward is integrally provided at the lower end of the cylindrical body 12, and an outer cylinder 27 extending upward and downward is integrally provided outside the flange portion 26. A longitudinal ridge 28 is provided on the inner side of the lower portion of the outer cylinder 27, and the ridge 28 is formed so as to be fitted into the engaging recess 5 of the shoulder portion 2 and engageable with the engaging recess 5. ..

The outer cylinder 27 is fitted with a synthetic resin covering cylinder 33 having a top plate 34, and is rotated by a knurled eye formed on a lower outer surface of the outer cylinder 27 and a lower inner surface of the covering cylinder 33. It is immovably fitted.

In the cap of the container of this embodiment, the front end of the bullet plate 14 provided on the inner peripheral edge of the upper portion of the cylindrical body 12 is fitted to the fitting portion 22 provided outside the hanging portion 19 of the packing 18. , Hold the packing 18.

The operation of this cap will be described below. First, when the tubular body 12 is externally fitted to the mouth tube portion 6 of the container 1 and screwed to rotate the covering tube 33, the contact surface 21 of the packing 18 contacts the upper surface of the mouth tube portion 6.

When the covering cylinder 33 is further rotated, the protrusion 28 provided inside the lower portion of the outer cylinder 27 rotates over the small protrusion 3 provided on the shoulder portion 2 of the container 1, and the protrusion 28 is It stops by hitting the large projection 4 of the shoulder 2 and is held in the engaging recess 5 to hold the cap in that position.

Then, the elastic plate 14 presses the peripheral edge portion 20 of the packing 18, and the contact surface 21 of the packing 18 is elastically pressed against the upper surface of the mouth cylinder portion 6 to seal the mouth cylinder portion 6. In the above embodiment, 20 bullet plates 14 are provided, but it is also possible to increase or decrease the number of bullet plates 14 or to form the bullet plates 14 in a laterally continuous annular shape. When the bullet plate 14 is formed to be continuous in the lateral direction, the thickness of the bullet plate 14 is reduced.

Further, in the above-described embodiment, the bullet plate 14 is formed integrally with the tubular body 12, but the bullet plate 14 may be formed of a metal plate which is separate from the tubular body 12. That is, an annular plate made of metal is formed, and 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. The annular plate is embedded in the cylindrical body 12 to be formed. Further, as described above, when the elastic plate 14 is made of metal, the elastic force of the elastic plate 14 can be prevented from deteriorating.

[0024]

[Effect of the device]

 According to the present invention, the peripheral edge 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 brought into pressure contact with the upper surface of the mouth cylindrical portion 6, so that the packing 18 is formed. It can be elastically pressed against the mouth tube portion 6 of the.

The elastic plate 14 is elastically pressed into contact by being bent, and is not compressed. Therefore, the elastic plate 14 can be formed of a rigid material and can retain elasticity for a long time.

[Brief description of drawings]

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

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

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

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

[Explanation of symbols]

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

Claims (1)

[Scope of utility model registration request] 1. A cylindrical body 12 which can be fitted into the mouth cylindrical portion 6 of the container 1.
A flexible elastic plate 14 extending inwardly is provided on the inner peripheral edge of the upper portion of the cylindrical body 12, and a plate-like packing 18 is fitted inside the cylindrical body 12, and a peripheral edge portion of the packing 18 is provided. Two
A contact surface 21 that contacts the upper surface of the mouth cylinder 6
And a fitting portion 22 is provided near the peripheral portion 20 of the packing 18, the tip of the bullet plate 14 is fitted into the fitting portion 22, and the tip of the bullet plate 14 is fixed to the packing 18 A container cap formed so as to abut on the upper surface of the peripheral edge portion 20 of the container.