JPH09169354A - Bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sealing function which works powerfully and securely between a bottle body and its cap in a bottle having a cap of the position- aligning type. SOLUTION: A bottle 10 has position-aligning means 11 for the circumferential positioning in both the bottle body 1 of synthetic resin and the cap 6. Between the cap 6 and the cylindrical mouth part 4 of the bottle body 1 on which the cap 6 is screwed to be set a ring-shaped sealing piece 8 is interposed, which is pressed against the upper end surface and the inner circumferential surface of the cylindrical mouth part 4 to form two sealing faces 20a, 20b. The seal that the sealing piece 8 produces by setting of the cap 6 on the bottle body 1 is made to work effectively as the seal of the bottle 10 as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottle-sealing structure having an alignment type cap such as a cap with a pump.

[0002]

2. Description of the Related Art In a bottle body 10 having a pump-equipped cap 6 shown in FIG. 5, the seal between the bottle body 1 and the cap 6 has conventionally been a flat plate ring-shaped packing 7 mounted in the cap 6. This is accomplished by screwing the cap 6 onto the upper end surface of the mouth cylinder portion 4 of the bottle body 1.

The bottle main body 1 in this conventional example has a changeable outer shape by releasably laminating an inner layer 3 forming a deformable inner bag inside an outer layer 2 forming a fixed outer shell. The blow molding body is made of synthetic resin, which enables the pouring and use of the content liquid without the outside air entering the content liquid storage section.

[0004]

By the way, the bottle 1
At 0, the pump cap 6 is attached to the spout 9
It is necessary to assemble and fix the bottle so as to face the bottle body 1 in a predetermined direction. Therefore, the cap 6 and the mouth tube portion 4 of the bottle body 1
A circumferential alignment means is provided between the cap 6 and
Is configured to be positioned at a predetermined position near the screwing limit with respect to the mouth tube portion 4.

On the other hand, the bottle body 1 made of synthetic resin is likely to have variations in the height dimension of the mouth tube portion 4 due to its molding error or the like.

As described above, since the pump cap 6 is positioned at the specified position of the mouth tube portion 4 by the alignment means, the height of the mouth tube portion 4 varies so that the mouth portion of the mouth tube portion 4 is unbalanced. If the height of the cylinder 4 is insufficient,
There is a problem that the packing 7 is insufficiently pressed against the upper end surface of the mouth tube portion 4 and a reliable sealing function is not exerted.

Therefore, the present invention was devised to solve the above-mentioned problems in the prior art, and in a bottle body provided with a cap of the alignment type, a strong and reliable connection between the bottle body and the cap is ensured. The purpose is to obtain the sealing function.

[0008]

Means for Solving the Problems The means of the present invention for achieving the above object is a bottle body in which a synthetic resin bottle body and a cap are provided with circumferential alignment means, and a cap,
A ring-shaped seal body is formed between the cap and the mouth cylinder of the bottle body, which is press-fitted to the upper end surface and the inner peripheral surface of the mouth cylinder to form a seal. It is in that.

It is effective to provide a convex portion around the upper end surface of the mouth cylinder portion of the bottle body.

It is preferable that the seal body is formed in a substantially inverted L-shape in section, which is composed of an upper plate portion and an inner cylindrical portion, and is mounted in the cap in advance.

A ridge may be provided around the outer peripheral surface of the inner cylindrical portion of the seal body.

An engaging recess is provided around the upper part of the outer peripheral surface of the mouth cylinder, and the seal body is formed into a substantially U-shaped cross section composed of an upper plate part, an inner cylinder part and an outer cylinder part, and the outer cylinder part is formed. An engaging convex portion that engages with an engaging concave portion of the mouth tube portion may be provided around the lower end of the inner peripheral surface of the above, and the seal body may be attached to the upper end of the mouth tube portion in advance.

An outer layer made of synthetic resin that forms a regular outer shell by blow molding, and an inner layer made of synthetic resin that is releasably laminated on this outer layer to form a flexible inner bag. It is preferable to be composed of

Suitably, the cap is a cap with a pump.

[0015]

When the cap is screwed and assembled to the mouth cylinder of the bottle body, the seal body is pressed against the upper end surface and the inner peripheral surface of the mouth cylinder to form a two-sided seal portion. Exert function.

Further, when a convex portion is provided around the upper end surface of the mouth tube portion of the bottle body, the convex portion bites into the seal body to obtain a stronger sealing property.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a main part of a bottle body 10 according to a first embodiment of the present invention. The bottle body 1
With the same construction as the conventional example shown in FIG. 5, an outer layer 2 made of high-density polyethylene resin and an inner layer 3 made of nylon are blow-molded from a parison extruded into a laminated cylindrical shape by coextrusion molding means, On the outer peripheral surface of the cylindrical tubular portion 4, a screw thread for assembling the pump-equipped cap 6 is engraved.

At the boundary between the mouth tube portion 4 and the shoulder portion of the bottle body 1, a stopper piece 12 having a large degree of projection and a locking piece 13 having a small degree of projection, which constitute one of the positioning means 11, are provided.
And protruding.

The main body portion of the cap 6 with a pump has a cylindrical threaded cylinder 14 having a thread formed on the inner peripheral surface thereof, an outer cylinder 15 located outside the threaded cylinder 14, and a threaded cylinder 14. And outer cylinder 1
5 has a top plate 16 that integrally connects the upper ends of the five, and is formed into a top double cylinder structure. At the predetermined location between the screw cylinder 14 and the outer cylinder 15, the other of the alignment means 11 is provided. The constituent engaging projections 17 are continuously provided.

The engaging projection 17 has its lower end inner end overcoming the locking piece 13 of the bottle body 1 in the vicinity of the screwing limit when the cap 6 is screwed and assembled to the mouth tube portion 4. By engaging the locking piece 13 and the stopper piece 12 with each other, the bottle body 1 and the cap 6 are aligned with each other.

Further, inside the main body of the cap 6, a hanging cylinder 19 is assembled, which constitutes a part of the liquid suction mechanism and has a flange 18 at its upper end.

The seal body 8 is formed of a soft elastic material such as silicon rubber, NBR, or low density polyethylene in a ring shape having an upper plate portion 21 and an inner cylindrical portion 22 having a substantially inverted L-shaped cross section. 6 Lower surface of collar 18 inside and hanging cylinder 1
9 is fitted so as to be in close contact with the outer peripheral surface. The lower portion of the outer peripheral surface of the inner tubular portion 22 is reduced in diameter so as to be smoothly fitted into the mouth tubular portion 4.

In this seal body 8, the cap 6 is provided with the mouth tube portion 4
The lower surface of the upper plate portion 21 and the upper end portion of the outer peripheral surface of the inner tubular portion 22 are crimped to the upper end surface of the mouth tubular portion 4 and the upper end portion of the inner peripheral surface, respectively, by two-sided sealing. Parts 20a, 20
b is formed and exerts a strong sealing function.

In the second, third and fourth embodiments shown in FIG. 2, FIG. 3 and FIG. 4, a circumferential ridge-like shape is formed on the inner peripheral side end of the upper end surface of the mouth cylinder 4 of the bottle body 1. The convex portion 5 is formed in a stepped shape, and the convex portion 5 bites into the upper plate portion 21 of the seal body 8 to achieve a stronger sealing property of the seal portion 20a.

In the seal body 8 according to the third embodiment shown in FIG. 3, a ridge 23 is provided around the central portion of the outer peripheral surface of the inner tubular portion 22, and the ridge 23 and the inner peripheral surface of the mouth tubular portion 4 are provided. The seal portion 20b is formed by crimping.

In the fourth embodiment shown in FIG. 4, an engaging recess 26 is provided in the upper portion of the outer peripheral surface of the mouth cylinder portion 4 of the bottle body 1, while the sealing body 8 is provided on the upper plate portion 21 and the inner cylinder portion. The outer cylindrical portion 24 is formed into a ring shape having a substantially U-shaped cross section, and an engaging convex portion 25 that engages with the engaging concave portion 26 is provided around the lower end of the inner peripheral surface of the outer cylindrical portion 24. The seal body 8 is attached to the upper end of the mouth tube portion 4 in advance.

On the lower surface of the collar portion 18 in the cap 6, there is provided a ridge 27 that abuts the upper surface of the seal body 8. Therefore, when the cap 6 is screwed and assembled to the mouth tube portion 4, Since the protrusion 27 bites into the seal body 8,
Compared to pressing the seal body 8 with the lower surface of the collar portion 18, the operation of aligning the cap 6 by this screwing and assembling can be easily achieved with a relatively light operating force.

[0028]

Since the present invention has the above-described structure, the following effects can be obtained. When the cap is screwed and assembled to the mouth tube portion of the bottle body, the seal body is pressed against the upper end surface and the inner peripheral surface of the mouth tube portion to form a two-sided seal portion. Even if the height dimension is insufficient due to the variation in the height dimension, the strong and reliable sealing function can be exerted.

When a convex portion is provided around the upper end surface of the mouth tube portion, a stronger sealing property can be obtained by biting the convex portion into the seal body.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the right half of the essential portion of the first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of an essential part of the second embodiment of the present invention, in which the main body of the cap is omitted.

FIG. 3 is an enlarged cross-sectional view of a main part of the third embodiment of the present invention in which a main body of the cap is omitted.

FIG. 4 is an enlarged cross-sectional view of a main part of the cap according to a fourth embodiment of the present invention with the main body part of the cap omitted.

FIG. 5 is an overall front view showing a conventional technique with a right half sectioned vertically.

[Explanation of symbols]

1; Bottle body 2; Outer layer 3; Inner layer 4; Mouth tube part 5; Convex part 6; Cap with pump 7; Packing 8; Seal body 9; Pouring outlet 10; Bottle body 11; Positioning means 12; Stopper piece 13; Locking piece 14; Threaded cylinder 15; Outer cylinder 16; Top plate 17; Engaging projection piece 18; Collar part 19; Hanging cylinder 20a; Seal part 20b; Seal part 21; Upper plate part 22; Inner cylinder part 23; Projection Article 24; Outer tube portion 25; Engagement convex portion 26; Engagement concave portion 27;

Claims (7)

[Claims] 1. A bottle body (10) comprising a synthetic resin bottle body (1) and a cap (6) provided with circumferential alignment means (11), said cap (6) and said cap (6). Between the mouth tube (4) of the bottle body (1) to which (6) is screwed and assembled, the mouth tube (4)
By crimping on the upper end surface and the inner peripheral surface of the seal part (20a)
, (20b) with a ring-shaped sealing body (8) interposed. 2. A convex portion on the upper end surface of the mouth tube portion (4) of the bottle body (1).
The bottle according to claim 1, wherein (5) is provided around the bottle. 3. The seal body (8) is provided with an upper plate part (21) and an inner cylinder part (2).
2) and the cross section consisting of
(6) The bottle according to claim 1 or 2, which is mounted inside. 4. A ridge is formed on the outer peripheral surface of the inner cylindrical portion (22) of the seal body (8).
The bottle according to claim 3, wherein (23) is provided around the bottle. 5. An engaging recess (26) is formed in an upper portion of an outer peripheral surface of the mouth cylinder (4).
And seal the seal body (8) with the upper plate part (21) and the inner cylinder part.
(22) and the outer cylinder portion (24) are formed in a substantially U-shaped cross section, and at the lower end of the inner peripheral surface of the outer cylinder portion (24), an engagement protrusion that engages with the engagement recess (26). The bottle body according to claim 1 or 2, wherein the portion (25) is provided around the seal body (8), and the seal body (8) is attached to the upper end of the mouth tube portion (4) in advance. 6. An outer layer (2) made of synthetic resin, which comprises a bottle main body (1) formed by blow molding to form a regular outer shell, and the outer layer (2).
3. An inner layer (3) made of synthetic resin, which is releasably laminated to form a flexible inner bag.
Or the bottle according to 3 or 4 or 5. 7. The bottle according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein the cap (6) is a cap with a pump.