JP2503455Y2 - Container cap structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a cap structure of a container, and more specifically, a tubular neck portion provided at an upper end portion of the container and having an upper and lower opening, and a neck portion thereof. The present invention relates to improvement of opening / closing operability of a cap in a cap structure of a container including a cap detachably attached to the container.

<< Prior Art >> As a cap structure of this type of container, there is, for example, one in which a cap is screwed onto the neck of the container. With this structure, the cap can be reliably closed, but the cap has to be rotated many times when the cap is removed or the cap once removed is reattached to the neck, which results in poor open / close operability. .

In addition, a small-diameter columnar plug is formed on the lower surface of the cap, and a ring-shaped first ridge is formed around the inner plug, and can engage with the first ridge. There is also one in which the second protrusion is provided at a predetermined position on the inner circumference of the neck and the opening / closing operation is a one-touch type. That is, in order to close the cap, the inner plug is inserted into the neck portion and pushed in, so that the first protrusion rides over the second protrusion and is positioned below the second protrusion so that both engaging protrusions engage with each other. And thereby occlude. On the other hand, in order to remove the cap, the cap is pushed up to release the engagement between the two.
This one-touch type has the convenience that it can be opened and closed by moving the cap in the up-down direction, but if the fitting force of both ridges is strengthened to improve the sealing performance, a large force is required at the time of opening and closing operation (especially opening) And the workability deteriorates. Further, if the fitting force is weakened to improve workability, the hermeticity will be deteriorated and it will not be put to practical use.

Furthermore, in order to solve such a problem, in the above one-touch type, it is proposed that projections are provided on the lower surface of the cap and the upper surface of the neck portion, and at least one of the projections is tapered. With this structure, the cap is pushed down in the same manner as described above when closed, but when opened, the cap is rotated in a horizontal plane and pushed upward through the taper. With this structure, since leverage can be utilized, a large force can be easily obtained at the time of opening, and the openability can be improved while maintaining the sealing property to some extent.

<Problems to be solved by the invention> However, in the case of this structure, the protrusion cannot be made so large as required by the structure, and the strength of the protrusion cannot be secured. As a result, if the opening / closing operation is repeated many times, the protrusion may be scraped or crushed, and the opening operation may not be performed.

Further, in general, the inner diameters of the inner plug and the neck are made small in order to improve the openability and the sealing performance. Therefore, when the content of the container is a highly viscous liquid such as emulsion, the remaining content after use often cannot remain in the container and remains attached to the inner peripheral surface of the neck. If the inner plug is mounted inside the neck as it is, the contents that could not be returned are sandwiched between the inner plug and the inner peripheral surface of the neck and pushed upward. Then, the pushed contents adhere to the outer peripheral surface of the neck. Further, such contents have various problems such as not being uneconomical because they cannot be used, and dust and the like are apt to adhere to the contents, which is unsanitary.

This invention was made in view of the above background,
The object is to have good sealing property and operability, and even if the content has a high viscosity, the content attached to the inner peripheral surface of the neck is not extruded to the outside when the content is closed. To provide a cap structure for a container.

<< Means for Solving the Problem >> In order to achieve the above-mentioned object, in the container cap structure according to the present invention, a vertically-opened cylindrical neck portion provided at the upper end portion of the container and a detachable structure for the neck portion are provided. In a cap structure of a container provided with a cap to be mounted, an upper part of an inner peripheral part of the neck part has a substantially elliptical shape and is gradually reduced in diameter as it goes downward and approaches a perfect circle. A lower portion of the inner peripheral portion is formed into a substantially circular shape, and a first engaging protrusion protruding inward is formed at an upper position of the lower portion, and an undercut portion is provided at a lower position of the lower portion. On the other hand, the cap is integrally formed with a plug body that can be inserted into the neck portion at the center of the lower surface of the cap, and the proximal end portion of the plug body is substantially the same ellipse as the upper portion of the neck portion. The shape and its Both side portions on the minor diameter side are cut out to form a cutout portion, and the tip end portion of the plug is formed in a cylindrical shape having a diameter slightly smaller than that of the lower portion of the neck portion. A second engagement protrusion that is engageable with the first engagement protrusion is provided at an upper position, and further, when the cap is closed, the undercut portion and the tip end portion of the plug body are in close contact with each other, and A predetermined space portion is defined between an upper portion of the inner peripheral portion of the neck portion and a cutout portion of the base end portion of the plug body.

<Operation> To remove the cap from the closed state, rotate the cap. Then, the inner plug also rotates in the neck portion and tries to move upward so as to match the short diameter of the inner peripheral surface of the neck portion having the same length as the long diameter of the inner stopper. Due to this upward biasing force, the first
The engaging ridge of (1) rides over the second engaging ridge, and the engagement between the two is released, whereby it is released.

On the other hand, to attach the cap to the neck after use, insert the inner plug of the cap into the neck. Then, the tip part of the inside plug is guided to the center part along the inner surface of the neck part having a reduced diameter and a substantially elliptical diameter, and when the cap is pushed further downward, the tip part is inserted into the lower part of the neck part. Then, the closed position is closed, and the inner stopper and the neck are positioned by the long diameters of the ellipse.

At this time, the lower end portion of the inner plug abuts against the undercut formed in the neck portion and is thereby sealed.

Further, a space is defined between the notch formed at the base end portion of the inner plug and the inner peripheral surface of the neck. Then, the contents attached to the inner peripheral surface of the neck during use tend to be sandwiched between the inner stopper and the inner peripheral surface of the neck when the cap is closed, and try to flow out to the outside. Held in. As a result, the outflow to the outside is suppressed.

<Example> Hereinafter, a preferred example of a container cap structure according to the present invention will be described in detail with reference to the accompanying drawings.

 1 to 3 show an embodiment of the present invention.

As shown in the figure, 1 is a container body, and in this example, a glass bottle-shaped container is used. A cylindrical portion 2 having a reduced diameter is integrally formed on the upper end of the container body 1 so as to project upward. A protrusion 3 is formed on the outer periphery of the upper end of the tubular portion 2 so as to project outward. The cylindrical portion 2 has an outer shape of an ellipse and an inner shape of a circle.

The present invention has a neck portion 4 attached to the tubular portion 2.
And a cap 5 detachably attached to the neck portion 4
It consists of and.

First, the neck portion 4 has a double-cylinder structure having an outer cylinder 6 and an inner cylinder 7 connected to each other at the upper end surface and having a substantially elliptical shape in a flat cross section. When the neck portion 4 is mounted, the container body 1 is Tubular part 2
Is located between the tubes 6 and 7. An undercut 8 is formed on the inner circumference of the lower end of the outer cylinder 6, and the undercut 8 and the ridge 3 formed on the tubular portion 2 are engaged with each other, whereby the neck portion 4 is made to move. It is fixed at 1.

Further, the inner cylinder 7 penetrates vertically, and the upper portion 7a
Has a substantially elliptical cross section and is formed so as to approach a perfect circle while gradually decreasing in diameter as it goes downward. Further, the lower portion 7b of the inner cylinder 7 is formed in a tapered shape having a substantially circular cross section. A ring-shaped first engaging projection 9 is formed inside the upper end of the lower portion 7b, and an undercut 10 is formed at the lower end.

A cylindrical body 12 having a circular cross section is formed on the outer side of the lower portion 7b of the inner cylinder 7.
It is adapted to be fitted into the inner peripheral surface of the tubular portion 2.

On the other hand, the cap 5 is composed of a substantially elliptical top plate portion 15 and an inner plug 16 integrally formed so as to hang down at the center of the lower surface of the top plate portion 15. Then, the proximal end portion 16a of the inner plug 16
Has a substantially oval cross-section that is substantially the same as the shape of the upper portion 7a of the inner cylinder 7, and is formed so that the diameter gradually decreases toward the tip and approaches a perfect circle. Further, both sides of the base end portion 16a on the short diameter side are cut out to form a flat cutout portion 16a '.

The tip portion 16b of the stopper 16 is formed in a cylindrical shape having a diameter slightly smaller than that of the lower portion 7b of the inner cylinder 7. The outer diameter of the tip portion 16b is the same as or slightly larger than the inner diameter of the undercut 8 formed at the lower end of the inner cylinder 7. Further, a second engaging ridge 17 which can engage with the first engaging ridge 9 is formed at an upper position of the tip portion 16b.

To explain the operation of the above-described embodiment, first, in order to remove the cap 5 from the closed state as shown in FIG. 2, the top plate portion 15 of the cap 5 is rotated. Then, the inner plug 16 also rotates in the inner cylinder 7, and tries to move upward so as to match the short diameter of the inner cylinder 7 having the same length as the long diameter of the inner plug 16. Due to this upward biasing force, the first engagement protrusion 9 rides over the second engagement protrusion 17, and the engagement between the two is released, whereby it is released (see FIG. 3). At this time, the elliptical taper surface and the action of the leverage can be used to open with a small force.

Then, the contents can be flown out through the inner cylinder 7 by inverting or tilting the container body 1.

On the other hand, to attach the cap 5 to the neck 4 after use,
The inner plug 16 of the cap 5 is inserted into the inner cylinder 7 of the neck portion 4. Then, the tip portion 16b of the inner plug 16 is guided to the center along the inner surface of the upper portion 7a of the inner cylinder 7 which has a substantially elliptical shape with a reduced diameter. When the cap 5 is further pushed downward, the tip portion 16b is The inner cylinder 7 and the inner plug 16 are inserted into the lower portion 7b of the inner cylinder 7.
The two engaging projections 9 and 17 formed on each other are engaged with each other to close the closed position (see FIG. 2), and the inner stopper 16 and the inner cylinder 7 are positioned with respect to each other by the long diameters of the ellipses.

At this time, the lower end of the inner plug 16 comes into contact with the undercut 10 formed at the lower end of the inner cylinder 7 and is thereby sealed.

Further, the cutout portion 16 formed in the base end portion 6a of the inner plug 16
A space 2 is provided between a ′ and the inner peripheral surface of the upper portion 7a of the inner cylinder 7.
0 is defined (see FIG. 2). This space 20 is the inner cylinder 7
It becomes a reservoir for the contents attached to the inner peripheral surface of the. That is, when the content is a highly viscous substance such as an emulsion, it flows out through the inner peripheral surface of the inner cylinder 7 during extraction at the time of use, but even if the container body 1 is returned to the original state after use. All the contents attached to the inner peripheral surface are not returned to the inside of the container body 1 but remain at that position. When the cap 5 closes, the remaining contents are sandwiched between the inner plug 16 and the inner cylinder 7 and try to flow out. In the present invention, the contents contained in the space 20 are temporarily retained. It is possible to suppress the outflow.

Then, the contents that have been temporarily retained are the cap 5 for the next time.
When it is used after being opened, it is extracted together with the contents in the container body 1 and can be effectively used without being wasted.

In the above-described embodiment, the neck 4 is formed separately because the container body 1 is made of glass, but the present invention is not limited to this. For example, when the container body 1 is made of synthetic resin, The main body 1 and the neck portion 4 may be integrally formed.

<Effects of the Invention> As described in detail above, in the cap structure of the container according to the present invention, it is sufficient to push the cap into the neck portion when closing, and when opening, the cap is rotated to form an elliptical tapered surface, Utilizing the lever effect, it can be opened with a small force, so the opening and closing operability is improved. Moreover, since the elliptical tapered surface has a relatively large area,
The strength can be increased, and the function does not deteriorate even when the opening / closing operation is performed many times.

Further, since it can be opened with a small force as described above, it is possible to increase the engaging force, and further, the inside of the stopper is sealed between the lower part and the undercut of the neck, and the inside stopper and the neck are closed. Since the engagement with and is performed by the first and second engagement protrusions provided separately, the sealing property is also improved.

Furthermore, since a notch is formed on the short-diameter side surface of the substantially oval-shaped inner plug and a predetermined space is defined between the notch and the inner peripheral surface of the neck, even if the content has high viscosity. Even if there is, it is possible to temporarily hold the contents attached to the inner peripheral surface of the neck portion in the space portion. Therefore, it is hygienic without pushing out the contents to the outside and discarding them wastefully, and without fear that dust or the like will adhere to the extruded contents.

In addition, the dimensional accuracy is only required to be precise in the major diameters of the inner plug and the inner peripheral surface of the neck portion (not necessary over the entire circumference of the elliptical shape), and the structure becomes easy.

[Brief description of drawings]

FIG. 1 is a view showing each component of a preferred embodiment of a container cap structure according to the present invention. FIG. 1 (A) is a perspective view showing a cap, and FIG. 1 (B) is a perspective view showing a neck portion. , Fig. 2,
FIG. 3 is a sectional view for explaining the operation. DESCRIPTION OF SYMBOLS 1 ... Container main body, 4 ... Neck part 5 ... Cap, 8 ... Undercut 9 ... 1st engaging protrusion, 16 ... Inner plug 17 ... 2nd engaging protrusion

Claims (1)

(57) [Scope of utility model registration request] 1. A cap structure for a container, comprising: a cylindrical neck portion provided at an upper end portion of the container and having an upper and lower opening; and a cap removably attached to the neck portion, and an upper portion of an inner peripheral portion of the neck portion. The part has a substantially elliptical shape and is gradually reduced in diameter toward the bottom so as to come close to a perfect circle, and the lower part of the inner peripheral part has a substantially circular shape, and the upper part of the lower part has an upper position. A first engaging protrusion that protrudes inward is formed, and an undercut portion is formed at a lower position of the lower portion, while the cap is a plug that can be inserted into the neck portion at a central portion of a lower surface of the cap. The body is integrally formed so that the base end portion of the plug has a substantially elliptical shape that is substantially the same as the upper portion of the neck, and both side portions on the minor axis side are cut out to form a cutout portion. And the tip portion of the stopper is Is formed in a cylindrical shape having a diameter slightly smaller than that of the lower portion of the portion, and a second engagement protrusion capable of engaging with the first engagement protrusion is provided at an upper position of the tip portion, and When the cap is closed, the undercut portion and the front end portion of the plug body are in close contact with each other, and a predetermined space is provided between the upper portion of the inner peripheral portion of the neck portion and the cutout portion of the base end portion of the stopper body. A cap structure for a container, characterized in that parts are defined.