JP2004262504A - Inside plug of liquid pouring container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inside plug for a liquid pouring container in which the fitting strength of an inside plug fitting tube part to a mouth tube part of the pouring container is raised and a force acting diagonally upward is given to an outer tube so that the inside plug fitting part tightly embraces the container mouth tube part. <P>SOLUTION: The inside plug B is fitted into the container mouth tube part which has, on its outer periphery, a fitting protrusion 4 comprising a tilted face 2 and an expanded-diameter vertical plane 3. The inside plug B is equipped with a fitting tube part 8 comprising an outer tube 5, inner tube 6 and a shoulder wall 7. An outward tapered surface 10 extending in the direction same as the tilted surface of the container mouth tube part is formed from the lower surface of the shoulder wall to the outer tube. An inward tapered surface 12 is formed, folded from the end part of the outward tapered surface 10. The inward tapered surface 12 is constituted as an interference, with its lower side increasing to be bitten into the vertical plane of the container mouth tube part. The lower part of the outer tube 5 is provided with a fitting protrusion 9 to be fitted with the lower surface of the fitting protrusion 4 of the container mouth tube part. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an inner plug fitted to a mouthpiece of a liquid pouring container.
More specifically, the present invention relates to an inner plug in which fitting between a container mouth tube portion of a liquid discharging container and a fitting tube of the inner plug is strengthened.
[0002]
[Prior art]
As the inner plug of the conventional liquid pouring container, an outer tube and an inner tube of the fitting tube portion of the inner plug, or a ridge or a concave line is provided in the container mouth tube portion, and the fitting tube portion of the inner stopper and the container mouth tube are provided. The one in which the fitting with the part is strengthened is conventionally known (for example, see Patent Document 1).
There is also known an inner plug fitting cylindrical portion provided with a convex ridge on the inner cylinder and a concave ridge on the outer cylinder (for example, see Patent Document 2).
[0003]
[Patent Document 1]
Microfilm of Japanese Utility Model Application No. 55-171969 (Japanese Utility Model Application Laid-Open No. 57-95345) (FIG. 2 before correction, FIG. 2 after correction)
[Patent Document 2]
Microfilm of Japanese Utility Model Application No. 53-157499 (Japanese Utility Model Application Laid-Open No. 55-74663) (FIG. 5)
[0004]
[Problems to be solved by the invention]
However, although the fitting portion outer cylinder of the conventional example has a concave portion formed on the inner surface, the surface that engages with the mouthpiece portion is a vertical surface, so there is no space between the outer circumference and the mouthpiece portion. However, there is a problem that the amount of interference is uniform in the upper and lower directions, and the amount of interference cannot be increased.
[0005]
The present invention has a technical problem to solve the above problems, while increasing the fitting strength of the inner plug fitting tubular portion to the mouthpiece portion of the dispensing container, and imparting a force acting obliquely upward to the outer cylinder. It is another object of the present invention to provide an inner plug used for a liquid pouring container in which an inner plug fitting portion tightly embraces a container mouth tube portion.
[0006]
[Means to solve the problem]
The present invention, in order to solve the above-mentioned problem, as an inner plug, a fitting ridge formed of an inclined surface and an enlarged vertical surface, with an inner plug fitted to a container mouth tube portion provided on the outer periphery. The inner plug has an outer cylinder, an inner cylinder, and a fitting cylinder portion composed of a shoulder wall.From the lower surface of the shoulder wall toward the outer cylinder, in the same direction as the inclined surface of the container mouth cylinder portion. An outward tapered surface extending is formed, and an inward tapered surface is formed by folding back from an end portion of the outward tapered surface, and the lower side is enlarged so that the inward tapered surface bites into a vertical surface of the container mouth portion. In this case, an engagement ridge that engages with the lower surface of the fitting ridge of the container mouth cylinder portion is provided at the lower part of the outer cylinder.
[0007]
As a specific embodiment of the fitting cylinder portion, a lower end portion of the outwardly tapered surface extends below the lower end of the inclined surface of the container mouth cylinder portion, is located slightly away from the vertical surface, and is located inside from the lower end portion. A configuration characterized in that a direction taper surface is formed is employed.
[0008]
As a specific embodiment of the fitting cylinder portion, a lower end portion of the outward tapered surface extends downward from a lower end of the inclined surface of the container mouth tube portion, and forms a cutout surface facing outward at the lower end portion. A configuration is adopted in which an inwardly tapered surface is formed from the end of the surface, and a recess is provided between the outwardly tapered surface and the inwardly tapered surface.
[0009]
Further, as another embodiment, the lower end of the outward tapered surface is located above the lower end of the inclined surface of the container mouth tube portion, and forms a cut surface facing outward from the lower end. A configuration is adopted in which a direction taper surface is formed, and a concave portion is provided between the outward taper surface and the inward taper surface.
[0010]
Still further, as another embodiment, the lower end of the outward tapered surface is positioned so as to coincide with the lower end of the inclined surface of the mouthpiece, and forms a cut surface directed outward from the lower end. A configuration is adopted in which an inward tapered surface is formed from the end, and a concave portion is provided between the outwardly tapered surface and the inwardly tapered surface.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, A is a liquid discharge container for storing contents, B is an inner stopper, and C is a cap, all of which are formed of synthetic resin.
The mouthpiece portion 1 of the container A is provided with a fitting ridge 4 formed on the outer periphery thereof, which is formed by an inclined surface 2 and an enlarged vertical surface 3.
[0012]
The inner plug B has a fitting tube portion 8 composed of an outer tube 5, an inner tube 6, and a shoulder wall 7. An engagement ridge 9 that engages below the fitting ridge 4 is provided.
[0013]
As shown in FIG. 2, the inner surface of the fitting tube portion 8 of the inner plug B has an outward direction having the same tapered surface as the inclined surface 2 of the mouth tube portion 1 from the lower surface of the shoulder wall 7 toward the outer tube 5. The tapered surface 10 is formed, and the end 11 of the outward tapered surface 10 is located at a point slightly lower than the lower end of the inclined surface 2 and slightly away from the outer surface of the vertical surface 3.
An inwardly tapered surface 12 is formed by folding back from the end 11 of the outwardly tapered surface 10, and continues to the engaging ridge 9.
The inward tapered surface 12 intersects with the vertical surface 3 of the mouthpiece portion 1, and a lower part thereof is formed with a tightening margin below the vertical surface 3.
[0014]
In addition, the end 11 of the outward tapered surface 10 may be located at the intersection of the lower end of the inclined surface 2 of the mouthpiece 1 and the vertical surface 3 in addition to the above.
In that case, an interference that starts from the upper end of the inward tapered surface 12 and increases on the lower side is formed.
[0015]
The inclination of the inward tapered surface differs depending on the shape and dimensions of the inclined surface of the mouthpiece and the outer cylinder, and the height of the vertical surface is usually about 1.5 to 4.0 mm. The difference (ro × 2) between the diameter of the upper end of the surface and the diameter of the lower end 12A can be in the range of 0.1 to 2.0 mm, but is preferably in the range of 0.2 to 1.2 mm.
[0016]
As shown in FIG. 1, a screwing cylinder 14 having an inwardly extending injection tube 13 is provided upright at an inner end of the fitting cylindrical portion 8, and the injection tube 13 has an injection hole. A partition 15 provided with a cutting groove to be formed and a pull ring 16 are provided.
The cap C includes a top wall 17 on which a sealing ring engaged with the pouring tube 13 is vertically provided, and a side wall 18 provided with a screw screwed into the screwing tube 14 on the inner surface.
[0017]
Next, the operation and effect of the inner plug of the present invention will be described.
The inner plug B is fitted to the container A mouthpiece portion 1 by tapping, but at the time of fitting, as shown in FIG. 2 (b), the outer cylinder 5 undergoes elastic deformation, leaving a recessed portion. The inner cylinder 6 is deformed according to the shape of the outer peripheral surface of the cylindrical portion 1 and fastened to the outer periphery of the cylindrical portion 1 with a larger interference toward the lower side, and the inner cylinder 6 is fastened to the inner circumference of the cylindrical portion 1 with a fixed interference.
[0018]
The inward tapered surface 12 is fastened to the vertical surface of the fitting ridge 4 with a larger amount of interference as it goes downward, and the engaging ridge 9 engages with the lower surface of the fitting ridge 4. A force acting obliquely upward acts on the fitting ridge 4 to hold the fitting, so that the inner plug B fitting cylindrical portion 8 is firmly fitted to the fitting ridge 4.
[0019]
Next, a description will be given of a first embodiment relating to the fitting tubular portion of the inner plug.
As shown in FIG. 3, the fitting tube portion 8a of the inner plug Ba includes an outer tube 5a, an inner tube 6a, and a shoulder wall 7a.
An outward tapered surface 10a having the same tapered surface as the inclined surface 2 of the mouthpiece portion 1 is formed from the lower surface of the shoulder wall 7a toward the outer tube 5a, and an end 11a of the outward tapered surface 10a is It is located below the lower end of the inclined surface 2 of the cylindrical portion 1.
[0020]
The cut surface 20 is cut outward from the end 11a, and an inward tapered surface 12a that is inclined inward is formed below the end 21 of the cut surface 20.
Due to the cutting of the cut surface 20, a concave portion 22 is formed between the outward tapered surface 10a and the inward tapered surface 12a.
The cut surface is cut substantially horizontally in the embodiment, but may be an inclined surface as long as a concave portion can be formed.
The inward tapered surface 12a intersects with the vertical surface 3, and a lower portion of the interference is formed below the vertical surface 3.
[0021]
At the time of tapping of the inner plug Ba, at the beginning of tapping, the lower end of the outer cylinder 5a is pushed outward, but the lower end of the outer cylinder 5a is easily spread due to the presence of the concave portion 22 so that tapping can be performed more smoothly. Will be
[0022]
When the tapping is completed, as shown in FIG. 3 (b), the fitting tube portion 8a is fastened to the mouth tube portion 1, and the inward tapered surface 12a is tightened with a larger allowance toward the lower side. The operation and effect of the invention can be obtained.
[0023]
Next, a description will be given of a second embodiment relating to the fitting tube portion.
As shown in FIG. 4, the fitting cylinder portion 8b of the inner plug Bb includes an outer cylinder 5b, an inner cylinder 6b, and a shoulder wall 7b.
[0024]
The end 11b of the outward tapered surface 10b from the lower surface of the shoulder wall 7b toward the outer cylinder 5b is located above the lower end of the inclined surface 2 of the mouthpiece 1.
A cut surface 25 is cut outward from the end 11 b, and a downward inward tapered surface 12 b is formed from an end 26 of the cut surface 25.
The cut surface 25 forms a recess 27 between the outward tapered surface 10b and the inward tapered surface 12b.
[0025]
By providing the concave portion 27 and the inwardly tapered surface 12b at the time of tapping the inner plug, the same operation and effect as those of the first embodiment can be obtained, and the fitting cylindrical portion 8a is formed as shown in FIG. ), It is fastened to the mouthpiece 1.
[0026]
In the first and second embodiments, the lower end of the outwardly tapered surface is positioned above or below the lower end of the inclined surface of the barrel portion, that is, the intersection of the inclined surface and the vertical surface, and the lower end of the outer tapered surface is Although the cut surface facing in the direction is formed, the lower end of the outward tapered surface may be positioned so as to coincide with the lower end of the inclined surface, and the cut surface may be formed outward from the lower end portion.
In this case, substantially the same functions and effects as those of the above embodiments can be obtained.
[0027]
In the above embodiment, a screw cap is used as the cap, but a hinge cap hinged to the upper end of the outer cylinder or a fitting-type cap that covers the pouring cylinder may be used.
[0028]
【The invention's effect】
Since the present invention is configured as described above, it has the following effects.
An inwardly tapered surface that slopes inward is formed below the outer cylinder of the fitting cylinder portion of the inner plug, so that the amount of interference increases as going downward, and a force that works obliquely upward when fitting is applied. , Together with the engagement ridge at the lower end, the container mouth tube portion can be firmly held.
[Brief description of the drawings]
FIG. 1 is a partially sectional elevation view of a liquid dispensing container of the present invention.
FIGS. 2A and 2B are explanatory views of a main part of the inner cap and the inner cap, in which FIG. 2A is a longitudinal sectional view of the inner cap before fitting, and FIG. FIG. 4C is a longitudinal sectional view, and FIG. 5C is an enlarged view of a main part of FIG.
3A and 3B are explanatory views of a first embodiment of a fitting portion of the inner plug, wherein FIG. 3A is a longitudinal sectional view of the inner plug before fitting, and FIG. (C) is an enlarged view of a main part of FIG. (A).
FIGS. 4A and 4B are explanatory views of a second embodiment of a fitting portion of the inner plug, wherein FIG. 4A is a longitudinal sectional view of the inner plug before fitting, and FIG. (C) is an enlarged view of a main part of FIG. (A).
[Explanation of symbols]
A Containers B, Ba, Bb Inner plug C Cap 1 Mouth section 2 Inclined surface 3 Vertical surface 4 Fitting ridge 5, 5a, 5b Outer cylinder 6, 6a, 6b Inner cylinder 7, 7a, 7b Shoulder wall 8, 8a , 8b Fitting tube parts 9, 9a, 9b Engagement ridges 10, 10a, 10b Outward taper surfaces 11, 11a, 11b End portions 12, 12A, 12a, 12b Inward taper surfaces 13 Discharge tube 14 Screw-in tube 15 Partition wall 16 Pull ring 17 Top wall 18 Side wall 20, 25 Cut surface 21, 26 End 22, 27 Recess

Claims (5)

A fitting plug consisting of an inclined surface and an enlarged vertical surface, an inner plug fitted to a container mouth tube portion provided on the outer periphery,
The inner plug has an outer cylinder, an inner cylinder, and a fitting cylinder portion composed of a shoulder wall,
From the lower surface of the shoulder wall toward the outer cylinder, an outward tapered surface extending in substantially the same direction as the inclined surface of the container mouth cylinder portion is formed,
An inward tapered surface is formed by folding back from an end of the outwardly tapered surface,
The inward tapered surface is configured as a tightening margin whose lower side becomes larger so as to bite into the vertical surface of the container mouth portion,
An inner plug provided with an engaging ridge for engaging a lower surface of a fitting ridge of a container mouth portion at a lower portion of the outer cylinder. The lower end of the outward tapered surface extends below the lower end of the inclined surface of the container mouth tube, and is located slightly away from the vertical surface,
The inner plug according to claim 1, wherein an inwardly tapered surface is formed from the lower end. The lower end of the outward tapered surface extends downward from the lower end of the inclined surface of the container barrel, forms a cut surface facing outward at the lower end, and forms an inward tapered surface from the end of the cut surface. The inner plug according to claim 1, wherein a concave portion is provided between the outwardly tapered surface and the inwardly tapered surface. The lower end of the outward tapered surface is located above the lower end of the inclined surface of the container mouth portion, forms a cut surface facing outward from the lower end, and forms an inward tapered surface from the end of the cut surface. The inner plug according to claim 1, wherein a concave portion is provided between the outwardly tapered surface and the inwardly tapered surface. The lower end of the outward tapered surface is positioned so as to coincide with the lower end of the inclined surface of the mouthpiece, forms a cut surface facing outward from the lower end, and forms an inward tapered surface from the end of the cut surface. The inner plug according to claim 1, wherein the inner plug is formed and a concave portion is provided between the outward tapered surface and the inward tapered surface.

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