JP7445973B2 - lid - Google Patents

Description

The present invention relates to a lid provided at the mouth of a container, and particularly to a lid with a stopper for opening the inner lid film of the mouth.

The mouth of the container of Patent Document 1 is closed with an inner lid film. In addition, a lid is provided at the mouth. The lid includes a lid main body screwed into a mouth portion and a movable plug body, and a shaft whose lower end is cut diagonally is provided vertically in the center of the plug body. When the stopper is turned to an angle where it can be pressed down and placed in the open position, the shaft breaks the inner lid film and opens the stopper. This opens the container. When the stopper is pulled up to the height before opening, the stopper fits into the annular seal portion of the lid body and comes into close contact with the lid body, thereby sealing the space between the stopper and the lid body.

Japanese Patent Application Publication No. 2012-232786 (Figures 5 to 6)

In the lid of Patent Document 1, when the lid is opened by pushing down the stopper, the container is open. In order to seal the cap, it is necessary to lift the cap to the height before opening.
In view of such circumstances, an object of the present invention is to provide a lid with a stopper that can ensure airtightness of the container when the stopper is in the open position.

In order to solve the above problems, the present invention provides a lid provided at the mouth of a container, comprising:
a lid body formed in an annular shape surrounding the mouth with a holding hole and screwed onto the mouth;
A stopper that is inserted into the holding hole and is held movably along the axial direction of the lid main body from an unopened position away from the inner lid film of the mouth portion to an open position where the inner lid film is opened. body and
The holding hole is characterized in that an annular seal portion is formed on the inner periphery of the holding hole to be in close contact with the plug in the open position.
Thereby, when the stopper is in the open position, the sealing state between the lid body and the stopper can be ensured by the close contact between the annular seal portion and the stopper. Therefore, the airtightness of the lid is ensured unless the lid is removed from the container.

An outer diameter of a sealed portion of the plug body that is in close contact with the annular seal portion when the plug body is in the open position is held opposite to the annular seal portion when the plug body is in the unopened position. It is preferable that the diameter is larger than the outer diameter of the portion to be held.
As a result, when the stopper is in the open position, the annular seal portion is brought into close contact with the portion to be sealed, thereby ensuring a sealed state. When the stopper is in the unopened position, the annular seal portion can hold the stopper. Since strong contact between the held portion and the annular seal portion is suppressed, the stopper can be easily moved from the unopened position to the open position.

It is preferable that an annular regulating convex portion having a larger diameter than the sealed portion is formed between the sealed portion and the held portion of the plug body. This prevents the stopper from being moved inadvertently.

According to the present invention, when the stopper of the lid with a stopper is in the open position, a sealed state between the lid body and the stopper can be ensured. As a result, the airtightness of the container can be ensured.

FIG. 1 is a cross-sectional view showing the upper part of a container fitted with a lid with a stopper according to an embodiment of the present invention in an unopened state. FIG. 2 is an enlarged sectional view of the center portion of the lid with a stopper in FIG. 1. FIG. 3 is a sectional view showing the upper part of the container in an unsealed state.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows the upper part of the container 1 in an unopened state. The contents of the container 1 are not particularly limited, and may be beverages or other foods, or non-foods. It may be a liquid, a gel, powder or other solid. In the following description, unless otherwise specified, it is assumed that the container 1 is in an unopened state that has never been opened after the contents have been sealed.

An annular inner flange 3a is formed at the bottom of the mouth 3 of the container 1 so as to protrude radially inward. The inner circumferential surface of the inner flange portion 3a is a tapered surface 3d whose diameter decreases downward. The inside of the inner flange portion 3a serves as a bottom opening 3c of the mouth portion 3. An inner lid film 4 is placed over the bottom opening 3c. The container 1 is sealed with an inner lid film 4. The inner lid film 4 is integrated with the shoulder film 2a that constitutes the inner layer of the shoulder 2, but may be separate from the shoulder film 2a.

As shown in FIG. 1, the mouth portion 3 of the container 1 is provided with a lid 5. As shown in FIG. The lid 5 includes a lid body 10 and a stopper body 20.
The lid main body 10 has a holding hole 15 in the center, is formed in an annular shape surrounding the opening 3, and can be screwed into the opening 3. Specifically, the lid main body 10 includes an outer ring portion 11 having a larger diameter than the mouth portion 3, a lid top plate 12, a middle ring portion 13, and an inner ring portion 14. The outer circumferential plate portion 12a of the lid top plate 12 is continuous with the upper end portion of the outer circumferential ring portion 11. The plate portion 12b of the lid top plate 12 on the inner side of the outer circumferential plate portion 12a has an annular shape and is recessed below the outer circumferential plate portion 12a. A circular recess 12c is formed on the top surface of the lid top plate 12. A holding hole 15 is formed in the center of the lid top plate 12.

Inside the outer ring portion 11, a middle ring portion 13 having a smaller diameter is provided. The upper end of the middle ring part 13 is connected to the middle part of the inner plate part 12b of the lid top plate 12. A female threaded portion 13b is formed on the inner surface of the middle ring portion 13. The female threaded portion 13b is screwed into the male threaded portion 3b on the outer periphery of the mouth portion 3. In the completely screwed state, the upper end of the mouth portion 3 abuts against the inner plate portion 12b.

Inside the middle ring part 11, an inner ring part 14 having a smaller diameter is provided. The inner ring portion 14 projects downward from the inner peripheral edge of the annular inner plate 12b. The inner ring portion 14 is inserted into the mouth portion 3.

The inside of the inner ring portion 14 constitutes a holding hole 15 . The holding hole 15 is vertically penetrated.

As shown in an enlarged view in FIG. 2, an annular seal portion 16 is formed on the lower inner periphery of the inner ring portion 14 (and thus the holding hole 15). The annular seal portion 16 has a cylindrical surface shape that protrudes radially inward from the inner circumferential surface 14c of the inner ring portion 14 above it. The end surface of the annular seal portion 16 on the inner peripheral surface 14c side is an inclined end surface 16b that slopes upward toward the inner peripheral surface 14c.

The outer peripheral surface of the inner ring portion 14 is a tapered surface whose diameter decreases downward. The taper angle changes at a height near the middle of the annular seal portion 16, with the portion above the height being a gentle taper portion 14a, and the portion below the height being a steep taper portion 14b. At the lower end of the inner ring portion 14, the inner circumferential surface of the annular seal portion 16 and the steeply tapered portion 14b intersect with each other at an acute angle to form a ring edge portion 16e.

As shown in FIG. 1, a plug 20 is held in the holding hole 15. The plug body 20 includes a shaft 21 and a flange 22. The shaft 21 and the flange 22 are arranged on the same axis.

A flange 22 is provided at the upper end of the cylindrical shaft 21. The flange 22 is formed into a disk shape with a larger diameter than the shaft 21. Preferably, flange 22 fits within circular recess 12c. In the unopened state, the flange 22 is spaced upward from the inner plate part 12b, and the upper surface of the flange 22 is substantially flush with the upper surface of the outer peripheral plate part 12a of the lid top plate 12.

The shaft 21 projects downward from the flange 22 and is inserted into the holding hole 15.
The lower end surface of the shaft 21 is an oblique end surface 27. The lower end of the slanted end surface 27 forms an acutely pointed stopper edge portion 27e.

As shown in an enlarged view in FIG. 2, two annular protrusions 24 and 26 are formed below the middle of the outer circumferential surface of the shaft 21. As shown in FIG. These convex portions 24 and 26 are separated from each other in the axial direction (up and down) of the shaft 21. The relatively upper convex portion is referred to as a regulating convex portion 24, and the lower convex portion is referred to as a retaining convex portion 26. The cross-sectional shapes of the regulating convex portion 24 and the retaining convex portion 26 are both trapezoidal. The outer diameter of the regulating protrusion 24 is larger than the outer diameter of the retaining protrusion 26, and the regulating protruding part 24 projects further radially outward than the retaining protruding part 26.
By making the retaining convex portion 26 smaller in diameter than the regulating convex portion 24, it is easier to fit the shaft 21 into the inner ring portion 14 when assembling the lid body 10 and the stopper body 20.

A portion of the shaft 21 between the regulating convex portion 24 and the retaining convex portion 26 constitutes a held portion 25 . The held portion 25 has a short cylindrical shape, and its axial length is substantially equal to the axial length (the vertical dimension in FIG. 2) of the annular seal portion 16. The outer diameter of the held portion 25 is substantially equal to the inner diameter of the annular seal portion 16 in the unsealed state. The non-sealed state refers to a state in which no sealing pressure is applied to the annular seal portion 16 in the radially expanding direction, or a natural state in which no stress is applied to the annular seal portion 16. "Substantially" means that minute dimensional differences on the order of microns or less are allowed.

A portion 21a of the shaft 21 closer to the flange 22 than the regulating convex portion 24 has a straight cylindrical shape that is longer than the held portion 25. A portion of the cylindrical portion 21 a that is closest to the regulating convex portion 24 constitutes a sealed portion 23 . The outer diameter of the cylindrical portion 21a including the sealed portion 23 is larger than the outer diameter of the held portion 25, and therefore larger than the inner diameter of the annular seal portion 16 in the non-sealed state. The cylindrical portion 21a including the sealed portion 23 has approximately the same diameter as the retaining protrusion 26 and has a smaller diameter than the regulating protrusion 24.
In other words, the regulating convex portion 24 has a larger diameter than the sealed portion 23 and the held portion 25, and is interposed between the sealed portion 23 and the held portion 25.

As shown in FIGS. 1 and 3, the cap body 20 is movable along the axial direction of the lid body 10 from an unopened position (FIG. 1) to an opened position (FIG. 3). is held in

As shown in FIGS. 1 and 2, when the stopper 20 is in the unopened position, the container 1 is in an unopened state. The edge 27e is separated upward from the inner lid film 4 of the mouth portion 3 (toward the lid top plate 12 side). An annular seal portion 16 is sandwiched between two convex portions 24 and 26 of the plug body 20. As a result, the held portion 25 is held facing the annular seal portion 16. The outer peripheral surface of the held portion 25 and the inner peripheral surface of the annular seal portion 16 are in contact with substantially zero clearance.

Further, the ring edge portion 16e is close to or in contact with the inclined end surface of the upper end of the retaining convex portion 26. This prevents the plug body 20 from coming off from the lid body 10.
In addition, the upper inclined end surface 16b of the annular seal portion 16 is close to or in contact with the lower inclined end surface 24b of the regulating convex portion 24, and is hooked thereon. This prevents the stopper 20 from inadvertently shifting to the open position (FIG. 3) unless a pressing force of a predetermined magnitude or more is applied to the stopper 20.

When opening the container 1, the stopper 20 is pushed down with a force greater than the predetermined amount. At this time, the inclined end surface 16b of the annular seal portion 16 slides against and is guided by the lower inclined end surface 24b (FIG. 2) of the regulating convex portion 24, thereby elastically deforming the inner ring 14 to expand its diameter. However, the plug body 20 can be smoothly pushed down.
As shown in FIG. 3, the container 1 is opened by the plug edge portion 27e of the pressed-down plug body 20 breaking the inner lid film 4. The edge of the tapered surface 3d of the inner flange portion 3a and the stopper edge portion 27e of the stopper body 20 function like a sandwich between each other, so that the inner film 4 can be easily and reliably cut.

As shown in FIG. 3, the flange 22 eventually abuts against the inner peripheral plate portion 12b. This places the stopper 20 at the open position. The regulating convex portion 24 passes over the annular seal portion 16 and is moved downward from the annular seal portion 16 . As a result, the sealed portion 23 is brought into close contact with the annular seal portion 16 . Since the outer diameter of the sealed portion 23 is larger than the inner diameter of the annular seal portion 16 in its natural state, the inner ring portion 14 is elastically deformed to expand its diameter, and the annular seal portion 16 is tightly adhered to the sealed portion 23. . As a result, when the stopper 20 is placed in the open position, the space between the stopper 20 and the lid body 10 is sealed. As long as the stopper 20 is in the open position, the airtightness between the stopper 20 and the lid body 10 is maintained at all times. There is no need for the operation of returning the stopper to its original position for sealing (see Patent Document 1).
Airtightness between the lid body 10 and the container 1 is ensured by the contact between the upper end of the mouth portion 3 and the inner plate portion 12b. Therefore, even after opening, the airtightness of the container 1 can be ensured as long as the lid 5 is not removed.
By bringing the ring edge portion 16e close to or in contact with the upper end surface of the regulating convex portion 24, the stopper body 20 is prevented from floating with respect to the lid body 10.

When taking out the contents from the container 1, the lid 5 is removed from the container 1 by turning the lid 5 to unscrew the threaded parts 3b and 13b.
When the lid 5 is screwed onto the mouth portion 3 again and attached, the airtightness of the container 1 can be ensured in the same manner as when the lid is opened.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit thereof.
For example, the regulating convex portion 24 may be omitted.

The present invention can be applied to container lids.

1 Container 3 Opening part 3b Male screw part 4 Inner lid film 5 Lid 10 Lid main body 13b Female screw part 14 Inner ring part 15 Holding hole 16 Annular seal part 20 Plug body 21 Shaft 22 Flange 23 Sealed part 24 Regulating convex part 25 Cover Holding part 26 Removal prevention convex part

Claims (3)

A lid provided at the mouth of the container,
a lid body formed in an annular shape surrounding the mouth with a holding hole and screwed onto the mouth;
A stopper that is inserted into the holding hole and is held movably along the axial direction of the lid body from an unopened position away from the inner lid film of the mouth portion to an open position where the inner lid film is opened. body and
A lid, characterized in that an annular seal portion is formed on the inner periphery of the holding hole to be in close contact with the plug in the open position. An outer diameter of a sealed portion of the plug body that is in close contact with the annular seal portion when the plug body is in the open position is held opposite to the annular seal portion when the plug body is in the unopened position. The lid according to claim 1, wherein the lid has a larger diameter than the outer diameter of the held portion. The lid according to claim 2, wherein a regulating convex portion having an annular shape and having a larger diameter than the sealed portion is formed between the sealed portion and the held portion of the plug body. .

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