JPH0532222Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a double aerosol container, and more specifically, a compressed gas that fills a flexible inner bag with contents and presses the inner bag into an outer cylinder. The present invention relates to an adapter used for a double aerosol container containing a propellant (hereinafter referred to as a propellant).

The aerosol container of this invention is used as a container for cosmetics, caulking agents, etc., but it is also used in various other industrial fields.

Prior Art A conventional double aerosol container adapter will be described with reference to FIG. FIG. 6 is a diagram showing a conventional double aerosol container adapter and an inner bag connected to the lower part of the adapter. Such a conventional adapter 50 has a brim-like packing part 51 formed on the upper end surface, and this packing part 51 is located between the mounting cup and the curled part of the outer cylinder, or between the outer cylinder without a curled part. In this case, by being sandwiched between the mounting cup and the opening of the outer cylinder, the contents in the inner bag and the propellant in the outer cylinder are prevented from leaking out of the outer cylinder. .

Problems to be solved by the invention However, since conventional adapters are made by injection molding a single piece of polyethylene resin, they are large and have an inner bag 52 with high gas permeability.
There is a drawback that the propellant pushing the adapter passes through the cylindrical portion 50a of the adapter 50 and mixes into the inner bag 52. If this is left unattended, there is a problem in that the propellant and the contents of the inner bag 52 get mixed together, resulting in deterioration of the contents.

Furthermore, the conventional adapter 50 was installed at the same time as the mounting cup was clinched. That is, when clinching the mounting cup to the curled portion of the outer cylinder, the flange 51 of the adapter 50 is clamped between the outer cylinder and the mounting cup, and the clinching claws of the clinching machine are used to clinch the mounting cup. Side surface and cylindrical part 5 of adapter 50
0a was simultaneously pushed out and clinched into the outer cylinder. However, the conventional adapter 50
Since it is manufactured by injection molding and all the cylindrical parts 50a are formed to have the same diameter, there is a problem that the cylindrical part 50a breaks or cracks occur during clinching.

This idea was created by focusing on these conventional problems, and it prevents the propellant from passing through the adapter and combining with the contents, and also prevents the cylindrical part from breaking and cracking during clinching. It is an object of the present invention to provide an adapter for a double aerosol container that does not generate such problems.

Means for Solving the Problem In order to solve this invention, a first invention includes a valve assembly 1, a mounting cup 3 for fixing the valve assembly 1 to the opening of the outer cylinder 2, and a mounting cup 3 for fixing the valve assembly 1 to the opening of the outer cylinder 2. A double aerosol consisting of an adapter 6 in which a brim-like packing part 6b is sandwiched between the ing cup 3 and the opening of the outer cylinder 2, and an inner bag 8 joined below the adapter 6. In the container, the adapter 6 is characterized by being composed of a plurality of synthetic resins Y and Z, including a gas barrier synthetic resin X, and the second invention is similar to the adapter 6 shown in the first invention. The adapter 7 is made of a plurality of synthetic resins Y and Z, including a gas barrier synthetic resin X, and has a bulging part 7b formed in the cylindrical part 7a of the adapter 7.

Function The function of this device having the above structure will be explained. In the first invention, since the adapter 6 is made of a plurality of synthetic resins Y and Z, including the gas barrier synthetic resin X, it is possible to prevent the propellant 10 from passing through the cylindrical part 6a of the adapter 6. . Therefore, the propellant 10 can be prevented from mixing with the contents of the inner bag 8. or,
The second idea is better than the first in that it can prevent gas permeation.
Since the second invention is similar to the invention, when the side surface of the mounting cup 3 is pushed outward with the clinch claw of the clinching machine, the protrusion 3a
is stored in the bulge 7b of the adapter 7, so
No cracks occur in the cylindrical portion 7a of the adapter 7.

Example Next, this invention will be explained based on the drawings.

First, the first idea (shown in Figures 1 and 2)
I will explain about it. The adapter 6 shown in FIG.
A brim-like packing part 6b is formed at the upper end of the cylindrical part 6a, and the upper edge of an inner bag 8 containing the contents is joined to the lower end of the cylindrical part 6a. As shown in FIG. 3, this adapter 6 is made of a plurality of synthetic resins Y and Z, including a gas barrier synthetic resin X, and is made by multilayer blow molding. Examples of synthetic resins with gas barrier properties include ethylene-
Saponified vinyl acetate copolymers, polyamide resins such as nylon, etc. are suitable. Further, as the plurality of synthetic resins Y and Z sandwiching the gas barrier synthetic resin X, for example, polyolefin resin such as polyethylene is suitable. Of course, it is also possible to use other synthetic resins. The adapter 6 according to the first invention is used for a double aerosol container of the type shown in FIG. That is, in FIG. 2, 1 is a valve assembly, 2 is an outer cylinder, 3 is a mounting cup, 4 is an opening, and 8 is an inner bag. Valve assembly 1 is a known aerosol valve. Further, the mounting cup 3 fixes the valve assembly 1 at the center thereof, and has a caulking portion 9 having a U-groove shape in cross section on the outer periphery. Outer cylinder 2
is a well-known pressure-resistant container, and is a bottomed cylindrical container made of metal such as aluminum. The opening 4 of this outer cylinder 2 is curled in a normal aerosol container, but in the double aerosol container of the type shown in FIG. 2, the edge is directed upward without being curled. It is formed as it is. With this type of double aerosol container, there is no need to protrude and clinch the mounting cup 3. Note that a hole for enclosing or discharging a propellant is provided in the bottom of the outer cylinder 2, and this hole can be sealed with a suitable plug (not shown). The inner bag 8 has aluminum film or the like bonded together, and both edges and bottom edge are adhered by heat sealing or the like, and has sufficient gas barrier properties. Further, the caulking portion 9 formed on the outer periphery of the mounting cup 3 and having a U-groove cross section is attached to the adapter 6.
The width and depth are such that the packing portion 6b and gasket can be accommodated therein.

Next, the second idea (shown in Figures 4 and 5)
I will explain about it. Differences from the configuration of the first invention will be explained below. The cylindrical portion 6a of the adapter 6 of the first invention has a cylindrical shape with the same diameter, whereas the adapter 7 of the second invention has a bulging portion 7b formed in the cylindrical portion 7a. are different. This adapter 7 is used for an aerosol container of the type in which a curled portion 5 is formed at the opening of the outer cylinder 2, as shown in FIG. In this type of double aerosol container, the mounting cup 3 is connected to the outer cylinder 2.
When clinching, the side surface of the mounting cup 3 is pushed outward by the clinching claws of the clinching machine, so that the protruding part 3a engages with the inner wall of the lower inclined part of the curled part 5. In the second invention, since the protruding part 3a of the mounting cup 3 can be accommodated in the protruding part 7b of the adapter 7 during this clinch, the protruding part 3a
The protrusion prevents the adapter from breaking or cracking. Other materials constituting the adapter 7 are the same as those of the first invention.

Effects As explained above, according to this invention, the gas barrier properties of the adapter are improved, so that the propellant can be prevented from passing through the adapter and being mixed into the inner bag. Furthermore, when used in a double aerosol container of the type in which the mounting cup and adapter are pushed outward and clinched using clinch claws, it has the effect of preventing the adapter from breaking or cracking during clinching.

[Brief explanation of the drawing]

Fig. 1 to Fig. 5 are drawings showing an embodiment of this invention, Fig. 1a is a partial vertical cross-sectional view of the adapter according to the first invention, Fig. 1b is a bottom view of the adapter according to the first invention, Fig. 2 is a vertical cross-sectional view of a double aerosol container using the adapter according to the first invention, Fig. 3 is an enlarged cross-sectional view of part A in Fig. 1 and Fig. 4, Fig. 4a is a partial vertical cross-sectional view of the adapter according to the second invention, Fig. 4b is a bottom view of the adapter according to the second invention, Fig. 5 is a vertical cross-sectional view of a double aerosol container using the adapter according to the second invention, Fig. 6 is a vertical cross-sectional view of a conventional adapter and inner bag. 1... Valve assembly, 2... External cylinder, 3...
...mounting cup, 6, 7...adapter,
6b: packing portion; 8: inner bag; X: synthetic resin with gas barrier properties; Y, Z: synthetic resin; 7a:
...Cylindrical portion, 7b...Bulging portion.

Claims (1)

[Claims for Utility Model Registration] (1) A valve assembly, a mounting cup for fixing the valve assembly to the opening of the outer cylinder, and a space between the mounting cup and the opening of the outer cylinder. A double aerosol container consisting of an adapter to which a brim-like packing part is sandwiched, and an inner bag joined to the lower part of the adapter, wherein the adapter is made of a plurality of synthetic resins including a gas barrier synthetic resin. A dual aerosol container adapter comprising: (2) The adapter for a double aerosol container according to claim 1, wherein a bulging portion is formed in the cylindrical portion of the adapter.