JP2527057Y2 - Double aerosol container - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention relates to
The present invention relates to a double aerosol container in which a propellant for imparting ejection power is stored separately.

[0002]

2. Description of the Related Art A double aerosol container is formed in a double structure of a pressure-resistant outer cylinder 1, usually made of metal such as aluminum or steel, and an inner cylinder 3 crushed by a pressing force of a propellant. The opening is clinched and sealed by a mounting cup 5 having a valve 18 (see FIG. 2).

[0003] As for the assembly, the outer cylinder 1 and the inner cylinder 3
Is not bonded or fixed with adhesive or other means,
The necking process is performed together in the state of simply touching. In addition, beading is performed in the opening, the inverted U-shaped groove 17 of the mounting cup 5 is covered on the bead portion 9, and the peripheral wall 15 of the mounting cup 5 is clinched to the neck 7. In places other than the clinch, the inner cylinder 3
Is easily separated from the outer cylinder 1, so that when pressed by the propellant, the inner cylinder 3 is crushed to the end (see a two-dot chain line in FIG. 3).

FIG. 10 shows an assembling procedure of a conventional double aerosol container. In the mounting cup 5, an inverted U-shaped groove 17 for covering a bead portion 9 on a peripheral edge portion is provided.
Is formed in the shape of a back gutter, and the gasket 19 formed in the shape of a flat ring is placed therein, whereby the gasket 1 is formed.
9, the mounting cup 5 is clinched to the neck 7.

[0005] On the top surface of the bead portion 9, a notch 11 in which the end of the inner cylinder 3 becomes a step 12 is formed by cutting the surface of the outer cylinder 1, and wrinkles on the surface which hinder sealing are removed therefrom.
The gasket is abutted. Therefore, as long as the gasket 19 is crimped on the top surface of the bead portion 9 at the position of the seal point P indicated by the dashed line, the gasket 19 can be used not only between the inner cylinder 3 and the mounting cup 5 but also between the inner cylinder 3 and the outer cylinder. 1 is effectively sealed, and leakage of the propellant is reliably prevented.

[0006]

When the bead portion 9 is covered with the inverted U-shaped groove 17 of the mounting cup 5, the gasket 19 is prevented from coming off the seal point P as shown by a solid line in FIG. The inverted U-shaped groove 17
Must be stored horizontally.

However, since the conventional gasket 19 has a plate shape that is easily displaced and easily deformed, the gasket 19 is not easily seated in the inverted U-shaped groove 17, and is bent, twisted, or inclined. As shown by the two-dot chain line, the seal may be abnormally accommodated, which may result in an incomplete seal at the seal point P of the bead portion 9, so that the leakage of the propellant cannot be reliably prevented.

[0008] In view of the above situation, the present invention is to form a gasket into a shape such that the gasket fits accurately in the inverted U-shaped groove of the mounting cup so as not to come off the seal point, thereby providing a propellant. An object of the present invention is to provide a double aerosol container that can reliably prevent leakage.

[0009]

According to a first aspect of the present invention, there is provided a double aerosol container comprising: a bead portion having an outer cylinder and an inner cylinder whose outer edges are both turned outward and fastened; And a notch formed by cutting the surface of the outer cylinder so that the opening end of the inner cylinder becomes a step on the top surface of the bead, and an inverted U-shaped groove covering the bead in a mounting cup that seals the opening. Is formed, a ring-shaped gasket that covers both sides of the bead portion is placed in the inverted U-shaped groove with the step as a boundary, and the gasket is crimped between the inverted U-shaped groove and the bead portion in a double aerosol container. The gasket is formed into an L-shaped cross section having a sleeve piece at the inner peripheral end of the base piece lying in the inverted U-shaped groove, and the sleeve piece is brought into contact with the peripheral wall of the mounting cup so that the mounting cup is clinched to the neck. It is characterized by having.

[0010] The double aerosol container of the second invention is
In the double aerosol container, a gasket to be pressed against the bead portion is formed into a hook-shaped cross section having a sleeve piece at an inner peripheral end of a curved base piece fitted into an inverted U-shaped groove, and the sleeve piece is formed into a mounting cup. It is characterized in that the mounting cup is clinched to the neck in contact with the peripheral wall.

[0011]

When the mounting cup is clinched on the neck, a gasket is placed in the inverted U-shaped groove. The gasket has an L-shaped or hook-shaped cross-section, and a flat-plate-like shape due to the rib shape of the cross-section. Unlike in some cases,
The gasket is located in the inverted U-shaped groove because it does not displace, does not easily bend or twist, and is supported so that the sleeve piece contacts the peripheral wall of the mounting cup so that it does not tilt. The position is accurately maintained at, and crimped without coming off the seal point. In other words, the gasket is covered with the bead portion on both sides of the notch, and the gasket is securely pressed to the seal point.
And the space between the inner cylinder and the mounting cup is completely sealed.

According to the second invention, since the base piece of the gasket is curved, the gasket has a particularly stable rib structure and is elastically accommodated in the inverted U-shaped groove. In addition, it can be prevented more reliably.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 5 show an embodiment (claim 1). The double aerosol container comprises an outer cylinder 1 and an inner cylinder 3.
And the mounting cup 5 (FIG. 2). The structure will be described according to the manufacturing process.

The outer cylinder 1 is manufactured from aluminum or steel having pressure resistance, and the inner cylinder 3 is formed into a diameter having a small gap between the inner cylinder 3 and the outer cylinder 1 by impact molding of aluminum.

The inner cylinder 3 and the outer cylinder 1 are combined, and necking is performed at the same time to form a neck portion 7 whose opening is narrowed. Further, the outer cylinder 1 and the inner cylinder 3 are both attached to the tip of the opening. A bead portion 9 which is inverted and curved outward is formed. In the bead portion 9, the inner cylinder 3 turns up and the outer cylinder 1 turns down.

A notch 11 is provided on the top surface of the bead portion 9 so that the opening end of the inner cylinder 3 is located exactly at the center of the width (FIG. 1), and the opening end is a step 12. The notch 11 is formed by cutting the surface of the outer cylinder 1 by surface cutting.

By forming the bead portion 9, the outer cylinder 1 and the inner cylinder 3
Is completed for the time being, the contents 13 are stored in the inner cylinder 3.
, The mounting cup 5 is clinched thereon, and after the assembly is completed, the outer cylinder 1 is filled with the propellant 14 from the bottom and the filling port is sealed with the stopper 16 to obtain a product.

The mounting cup 5 has a dish-like shape having a peripheral wall 15 standing upright. An inverted U-shaped groove 17 covered by the bead portion 9 is formed at the upper end of the peripheral wall 15 in an inverted gutter shape. Is mounted with a valve 18. When the mounting cup 5 is clinched, a gasket 19 is placed in the inverted U-shaped groove 17.

The gasket 19 is formed in a ring shape from rubber, and its cross section is formed by a base piece 20 and a sleeve piece 21.
When the sleeve piece 21 is fitted into the mounting cup 5 in contact with the peripheral wall 15, the base piece 20 is turned into the inverted U-shaped groove 1.
7 so that it fits horizontally.

The sleeve piece 21 does not need to be in close contact with the peripheral wall 15 of the mounting cup 5, and if its inclination is prevented to the extent that it does not deviate from the seal point P, the sleeve piece 21 has a diameter with a small gap between the sleeve wall 21 and the peripheral wall 15. It may be. As shown in FIG. 6, a bent piece 24 is attached to the outer peripheral end of the base piece 20.
Is formed, the cross-sectional shape is further stabilized, and deformation and positional deviation hardly occur.

When the inverted U-shaped groove 17 of the mounting cup 5 is covered with the bead portion 9, the gasket 19 is attached to the bead portion 9.
The outer tube 1 and the inner tube 3 are securely sealed by the abutting material 22 to cover the notch 11 at the same time. Further, at a position beyond the step 12 from the notch 11, the inner cylinder 3 and the mounting cup 5
The gasket 19 is thinly press-fitted between them, and the gap therebetween gradually decreases downward, and the gasket 19 is omitted below to form a space 25.

It is desirable that this space 25 does not occur,
In order to eliminate this, as shown in FIGS. 7 and 8, the sleeve piece 21 is formed into a wedge-shaped cross section which becomes gradually thinner at the tip.

FIG. 9 shows an embodiment of the second invention (claim 2).
A sleeve piece 21 is provided at the inner peripheral end of the base piece 20.
Since 0 is curved in a semicircular arch shape, the cross section is hook-shaped as a whole.

When the gasket 19 is formed in this manner, the gasket 19 is inserted into the inverted U-shaped groove 17 of the mounting cup 5.
Because it can be stuck by crimping and elasticity,
The sitting of the gasket 19 is further improved.

[0025]

As described above, according to the double aerosol container of the present invention, since the gasket to be compressed on the top surface of the bead portion is formed into an L-shaped or hook-shaped cross section, the inverted U-shaped groove of the mounting cup is formed. When the gasket is placed in the gasket, the gasket does not bend, twist, or incline, so that the gasket can be properly seated. Therefore, when the inverted U-shaped groove is covered with the bead portion, the gasket accurately covers the top surface of the bead portion, and even if there is a slight misalignment, the gasket does not come off from the seal point to cover the bead portion widely, so that the gasket does not come off. Since the gasket member is securely brought into contact with the notch, there is an excellent effect that leakage of the propellant can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an assembling procedure of a double aerosol container of the present invention.

FIG. 2 is a front view of the double aerosol container cut away.

FIG. 3 is an enlarged sectional view of a portion A in FIG. 2;

FIG. 4 is a perspective view of the gasket according to the embodiment of the present invention;

FIG. 5 is an enlarged sectional view taken along line BB of FIG. 4;

FIG. 6 is a sectional view showing a gasket according to another embodiment corresponding to FIG.

FIG. 7 is a sectional view showing a gasket according to still another embodiment, corresponding to FIG.

FIG. 8 is a sectional view showing a gasket according to still another embodiment, corresponding to FIG.

FIG. 9 is a cross-sectional view corresponding to FIG. 1, illustrating a procedure of assembling the double aerosol container according to another embodiment of the present invention.

FIG. 10 is a sectional view showing a conventional example corresponding to FIGS. 1 and 9;

[Explanation of symbols]

 Reference Signs List 1 outer tube 3 inner tube 5 mounting cup 9 bead portion 11 notch 12 step 15 peripheral wall 17 inverted U-shaped groove 19 gasket 20 base piece 21 sleeve piece

Claims (2)

(57) [Scope of request for utility model registration] An edge of the outer cylinder (1) and an inner edge of the inner cylinder (3) are both turned outward to form a tightly wound bead portion (9), and the top portion of the bead portion (9) A notch (11) is formed by cutting the surface of the outer cylinder (1) so that the opening end of the inner cylinder (3) becomes a step (12), and a bead portion (9) is formed in a mounting cup (5) that seals the opening. U-shaped groove (1
7) is formed, and a ring-shaped gasket (19) covering both sides of the bead portion (9) with the step (12) as a boundary is placed in the inverted U-shaped groove (17). Gasket (19) to be crimped in a double aerosol container with gasket (19) crimped to bead portion (9)
Is formed in an L-shaped cross section having a sleeve piece (21) at the inner peripheral end of the base piece (20) lying in the inverted U-shaped groove (17), and the sleeve piece (21) is attached to the peripheral wall (15) of the mounting cup. ), Wherein the mounting cup (5) is clinched to the neck (7) in contact with the container. 2. The outer rim of the outer cylinder (1) and the inner rim of the inner cylinder (3) are both turned outward to form a wound bead portion (9), which is formed on the top surface of the bead portion (9). A notch (11) is formed by cutting the surface of the outer cylinder (1) so that the opening end of the inner cylinder (3) becomes a step (12), and the bead is covered with a mounting cup (5) that seals the opening. A ring-shaped gasket (1) is formed in the inverted U-shaped groove (17) to cover both sides of the bead portion (9) with the step (12) as a boundary.
In a double aerosol container in which the gasket (19) is crimped between the inverted U-shaped groove (17) and the bead portion (9), the gasket (19) to be crimped is inserted into the inverted U-shaped groove (17). The curved base piece (20) fitted inside has a hook-shaped cross section having a sleeve piece (21) at the inner peripheral end, and the sleeve piece (21) is brought into contact with the peripheral wall (15) of the mounting cup, A double aerosol container characterized in that the mounting cup (5) is clinched to the neck (7).