JPH08244820A - Sealing structure of container - Google Patents

Abstract

PURPOSE: To obtain a sealing structure of a container that can be opened and closed with one simple operation and make the container compact with advantage. CONSTITUTION: In a sealing structure of a container, an upper end part of a cylindrical frame-form base part is covered with a top surface part 5, a deforming part 9 having a flexibility is formed in the stop surface part 5, a spout part extending upward is projected in the deforming part 9, and the spout part and a cover body 4 for sealing the spout part are fitted to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container sealing structure for improving the sealing property of contents liquid and preventing liquid dripping.

[0002]

2. Description of the Related Art Conventionally, as an example of a container sealing structure,
For example, there is a hinged cap. This cap is
It is composed of a cylindrical frame fixed to the opening of the bottle body and a cylindrical lid. The upper part of the frame is closed by a circular top surface, and the top surface is provided with a spout that projects upward. A lid that covers the spout is attached to the edge of the top surface via a resin hinge. A sealing projection that fits into the spout is formed on the inner surface of the lid. When the lid is fitted into the frame, the sealing projection of the lid fits into the spout. The bottle is sealed.

A nozzle type cap is also known. A small opening for pouring out the content liquid and a groove extending from the opening to the outer circumference of the cap are formed on the top surface of the cylindrical cap. A nozzle having a rectangular cross section is fitted into this groove, and the nozzle is attached to the edge of the opening so as to be able to move up and down. When the nozzle is stood up, the nozzle and the opening on the top surface communicate with each other, and when the nozzle is tilted, the opening on the nozzle and the opening on the top surface are blocked.

[0004]

However, in the case of the former hinge cap, since the spout portion is projected upward from the top surface portion in advance, the lid body requires a depth equal to the height of the spout portion. For this reason, the frame portion is increased only by the height of the spout portion, and the lid is also increased by the height of the spout portion, which is disadvantageous for making the bottle compact and reducing the amount of plastic used. is there.

Further, in the latter case of the nozzle type cap, since the spout of the nozzle is exposed, the content liquid remains attached to the spout and is easily contaminated.

The present invention has been made by paying attention to such a problem, and it is possible to further reduce the size of a container such as a bottle and to reduce the amount of plastic used, and also to cause stains. An object is to provide a difficult container sealing structure.

[0007]

In order to solve the above-mentioned problems, in a container sealing structure according to the present invention, an upper end portion of a cylindrical frame-shaped base is closed by a top surface portion, and a flexibility is provided in the top surface portion. Forming a deformable portion having an opening, and projecting an upwardly extending spout portion on the deformable portion, and the spout portion and a lid for sealing the spout portion are fitted together. Is characterized by.

[0008]

According to the container sealing structure of the present invention, when the lid is lifted at the time of opening, the deformed portion is pulled upward through the spout. Since the deformed part is flexible, it becomes convex and the spout extends upward. Therefore, when pouring out the content liquid, it becomes easy to pour. When the lid is closed, the lid and the spout are fitted to seal the spout, and the deformed portion is inverted and dented. Therefore, the spout is pushed in and the amount of protrusion of the spout is reduced. Since the spout is lowered due to the depression of the deformed portion, the height of the lid can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A container sealing structure according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a sectional structure of a cap as a container sealing structure of this embodiment. The cap 1 is made of polyethylene, polypropylene, or the like, as shown in FIG.
A cylindrical frame-shaped base portion 3 fixed to the mouth portion 2 of the plastic bottle as shown in FIG. Base 3
Is formed into a cylindrical shape, and the upper portion of the base portion 3 is a top surface portion 5. A step portion 6 for fitting is formed around the top surface portion 5 so that the peripheral edge portion of the lid body 4 can be fitted therein. The top surface portion 5 and the lid 4 are connected by a pair of hinges 7 and 7 and an L-shaped elastic hinge 8 formed between the pair of hinges 7 and 7, and the pair of hinges 7 and 7 and the L-shaped elastic member 7 are connected to each other. A so-called double action hinge is formed with the hinge 8.

The deformable portion 9 projects from the top surface portion 5 in a spherical shape and is located away from the hinges 7, 7. Deformation part 9
Is formed as a convex portion in this embodiment, it may be formed in a concave shape. The deformable portion 9 is formed to be thinner than the top surface portion 5, so that the top and bottom surface portion 5 can be deformed. The flexibility of the deformed portion 9 in the vertical direction can be provided not only by forming it thin, but also by forming it with a flexible resin (low density polyethylene, polyvinyl chloride, or the like). The deforming portion 9 and the top surface portion 5 may be made of the same resin as the base portion 3 or may be made of a different resin. In this embodiment, the deformable portion 9 and the top surface portion 5 are formed integrally with the base portion 3. A spout 10 is provided on an upper portion of the deformable portion 9.

The spout 10 is vertically displaced by the protrusion or depression of the deformable portion 9. The spout 10 is harder than the deformable part 9. The hardness of the spout portion 10 is given by making the wall thickness the same as the top surface portion 5. An annular bead 11 is provided around the end of the spout 10. The bead 11 engages with the tip convex portion 12a of the outer cylinder 12 of the lid body 4 and deforms the deformable portion 9 up and down as the lid body 4 opens and closes.

As shown in FIG. 1, a screw to be screwed into the mouth portion of the bottle 2 is formed inside the base portion 3, and an inner cylinder 13 fitted to the inner surface of the mouth portion of the bottle is formed on the lower surface of the top surface portion 5. Is projected. The mouth of the bottle 2 is fixed so as to be sandwiched between the inner cylinder 13 and the inner surface of the base 3.

The above-mentioned outer cylinder 12 is formed on the inner surface of the lid body 4, and the inner ring 14 is formed inside the outer cylinder 12. The tip of the outer cylinder 12 is the bead 11 of the spout 10.
It is squeezed toward the inside of the cylinder so that the lower part of it can be sealed, and it has a tip projection 12a at the tip.
When the lid 4 is opened and closed by engaging with the bead 11 of
The deformable portion 9 is adapted to be vertically deformed. Outer cylinder 1
A rib 15 is formed on the outer side of 2 to abut against the top surface portion 5 to prevent the deformation portion 9 from being excessively pushed and deformed.
When the rib 15 hits the top surface portion 5, the tip of the spout 10 enters the gap between the outer cylinder 12 and the inner ring 14, and the lower portion of the bead 11 of the spout 10 protrudes from the tip of the outer cylinder 12. The part 12a holds it.

According to the container sealing structure of this embodiment, the deformable portion 9 is normally pressed when the lid 4 is closed.
The deformed portion 9 is depressed and the spout portion 10 is provided with the outer cylinders 12, 1 of the lid body 4.
4 fit. When the lid 4 is lifted when opening, the deformable portion 9 is pulled above the top surface portion 5 via the spout 10. Since the deformable portion 9 has flexibility, the deformable portion 9 is inverted to be in a convex state, and the deformable portion 9 extends upward. Then, when the content liquid is poured out, the pouring portion 10 projects above the top surface portion 5, so that it becomes easy to pour. When the lid 4 is closed, the outer cylinder 1
2 and 14 are fitted into the spout portion 10 to seal the spout portion 10, and the deformed portion 9 is re-inverted and dented.

In this way, the deformable portion 9 is pushed in again and the amount of protrusion of the spout portion 10 is reduced, while the lid 4 is fitted into the spout portion 10, so that the height of the lid is lowered. Therefore, the amount of resin used in the cap 1 can be reduced and the product can be made compact. Further, the lid 4 can be easily opened and closed with one hand such as a thumb, and the sealing can be surely performed even by one-touch operation, so that the fingers and the like are not soiled.

In this embodiment, since the deformable portion 9 is located on the side opposite to the hinge 7 (fixed side) with respect to the center of the top surface portion, the deformable portion is provided at the center of the top surface portion as shown in FIG. 5 described later. Compared with the case where the lid 4 is formed, there is an advantage that the distance from the point of action when opening the lid 4 is short and therefore the deformable portion 9 can be easily pulled out with a relatively small force.

FIG. 5 shows a second embodiment. Figure 5
In the container sealing structure shown in (1), the deformable portion 9 is formed at the central position of the top surface portion 5. And the spout 1 shown in FIG.
A spout portion 16 having a diameter smaller than 0 is formed in the deformable portion 9, and a sealing protrusion 17 that replaces the inner ring 14 is projectingly provided on the lid body 4. The sealing protrusion 17 is fitted inside the spout 16 to seal the spout 16. The outer cylinder 18 has a smaller diameter than the outer cylinder 12 of FIG. 1 and is fitted to the outside of the spout portion 16. Although the support rib 15 and the step portion 6 are not formed on the side of the lid body 4, the description common to the first embodiment will be omitted by giving the same reference numerals to FIG. 1 in the drawing.

FIG. 6 shows a third embodiment of the present invention. In the container sealing structure of the third embodiment, the lid 4 is not connected to the base 3, and the lid 4 is screwed around the base 3. Further, the base portion 3 has an engaging portion 19 so as to be pushed and fixed in the mouth portion of the bottle 2, and a flange 20 for holding the lower end of the base portion 3 in the mouth portion of the bottle 2 and the engaging portion 19 are engaged. The engaging portion 21 is formed. Further, the spout 22 has a bead 23 on the base side (lower side), and
The tip projection 12a of the outer cylinder 12 holds the lower portion of the bead 23. The same components as those in the first embodiment are designated by the same reference numerals as those in FIG. 1 and their description is omitted.

[0020]

According to the container sealing structure of the present invention, when the lid is lifted at the time of opening the container, the deformed portion is pulled upward through the spout portion and the spout portion extends upward. Therefore, when pouring out the content liquid, it becomes easy to pour. Further, when the lid is closed, the lid and the spout are fitted to each other, the spout is sealed, and the deformed portion is inverted and pushed in. Therefore, the amount of protrusion of the spout is reduced, The height of the lid can be reduced. Therefore, it is possible to further reduce the size of a container such as a bottle, to reduce the amount of plastic used, and to provide a container sealing structure in which dirt hardly occurs.

[Brief description of drawings]

FIG. 1 is a sectional view showing a sectional structure of a container sealing structure according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the cap according to the first embodiment.

3 is a side view of the base of the cap shown in FIG.

FIG. 4 is a plan view of the base of the cap shown in FIG.

FIG. 5 is a sectional view of a cap showing a second embodiment of the present invention.

FIG. 6 is a sectional view of a cap showing a third embodiment of the present invention.

[Explanation of symbols]

 1 Cap 2 Bottle 3 Base 4 Lid 5 Top Surface 6 Step 7 Hinge 8 L-type Elastic Hinge 9 Deformation Part 10 Pouring Outlet 11 Bead 12 Outer Cylinder 13 Inner Cylinder 14 Inner Ring 15 Rib 16 of Lid Outlet 17 Sealing protrusion 18 Outer cylinder 19 Engagement portion 20 Flange 21 Engagement portion 22 Pouring outlet portion 23 Bead

Claims (1)

[Claims] Claim: What is claimed is: 1. An upper end of a cylindrical frame-shaped base is closed by a top surface portion, a flexible deformable portion is formed in the top surface portion, and an upwardly extending spout portion is provided in the deformable portion. A container sealing structure, wherein the spout and the lid for sealing the spout are fitted together.