JPH08175578A - Aerosol double-container - Google Patents

Abstract

PURPOSE: To provide an aerosol double-container which does not require a propellant sealed in the external can and a sealed opening for discharge and in which the propellant or the contents can be easily charged and sealed. CONSTITUTION: This aerosol double-container is constituted of the external can 3 composed of the bottom 6, the substantially cylindrical body 7, and the neck 8 with a smaller diameter than the body, the internal cylinder 4 inserted in the external can, forming a clearance 11 to charge a propellant 12 between the external can and the internal cylinder, and closely fitted in the neck at the position near the opening, substantially forming a cylindrical shape with the bottom, and a cover body 2 provided with an aerosol valve 5 and attached so as to cover the opening of the internal cylinder. Accordingly, when the aerosol valve 5 is opened, the internal cylinder 4 is pressed by the propellant 12 and the contents are ejected. A check valve mechanism 16 sending air from the internal cylinder 4 to only the external can 3 is fixed to the internal cylinder 4. The propellant 12 is compressed gas.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to dual aerosol containers. More specifically, the present invention relates to a dual aerosol container for propelling the contents in the inner cylinder through an aerosol valve by means of a propellant sealed in the gap between the outer can and the inner cylinder.

[0002]

2. Description of the Related Art As a conventional double aerosol container, a structure shown in FIG. 4 is known.

This double aerosol container 51 is shown in FIG.
As shown in (a), a bottomed cylindrical inner cylinder 54 inserted while forming a constant gap 61 around the inside of an outer can 53 having a substantially bottomed cylindrical shape, and an opening thereof. And a lid 52 fitted so as to close the. Then, when the aerosol valve 55 provided in the lid 52 is opened, the propellant 62 enclosed in the gap 61 is opened.
As a result, the inner cylinder 54 is compressed and the contents are ejected.

As the propellant 62, for example, CFC gas, liquefied natural gas, dimethyl ether, or a mixture thereof is used, which is pressurized and sealed in a liquid state.

The double aerosol container 51 is formed of the outer can 5
Since the inner cylinder 3 and the inner cylinder 54 are completely separated, the inner cylinder 5
4 is filled with the content, and the propellant 62 is sealed in the gap 61 from a sealing port 63 provided in the bottom portion 56 of the outer can 53. That is, as shown in FIG. 4 (b), the filling nozzle 70 for filling the propellant is provided with the filling port 6.
3 is pressed against the bottom portion 56 so as to cover it, and the propellant is filled from the sealing port 63 by the pressure of the propellant.
Further, since liquefied gas is used as the propellant 62, it is necessary to discharge the propellant 62 at the time when it has been used in order to satisfy the legal regulations, and the sealing port 63 serves as a discharge port for that purpose. It also plays a role.

[0006]

However, in the conventional double aerosol container, it is necessary to form the sealing port at the bottom of the outer can, which increases the manufacturing cost of the container and separates the content and the propellant from each other. Since the filling is performed in the filling step, the filling step cannot be simplified and the filling cost is increased.

In view of the above circumstances, the present invention has been made to solve the above problems, and utilizes a valve stem of an aerosol valve to propelant which is a compressed gas such as nitrogen or air. It is therefore an object of the present invention to provide a double aerosol container capable of reducing the cost, since it is not necessary to provide an outer can with a sealing port used for sealing or discharging a propellant.

[0008]

A double aerosol container according to the present invention comprises an outer can, which comprises a bottom, a body having a substantially cylindrical shape, and a neck having a diameter smaller than that of the body, and the outer can. An inner cylinder having a substantially bottomed cylindrical shape, which is inserted into the outer can while forming a gap in which a propellant that is a compressed gas is to be sealed, and the vicinity of the opening is tightly fitted to the neck, It comprises an aerosol valve and a lid member provided so as to close the opening of the inner cylinder, and when the aerosol valve is opened, the inner cylinder is crushed by the pressure of the propellant and the contents are ejected. A double aerosol container, wherein the inner cylinder is provided with a check valve mechanism for venting only the inner cylinder to the outer can, and compressed gas is enclosed as propellant in the gap. Is characterized by

The check valve mechanism is made of an elastic material such as rubber attached to the communicating portion so as to cover the communicating portion formed on the bottom portion of the inner cylinder and the hole formed in the communicating portion. It is preferably composed of an existing ring. Further, the compressed gas is preferably a compressed gas such as nitrogen or air.

[0010]

According to the double aerosol container of the present invention, the check valve mechanism provided in the inner cylinder for venting only the inner cylinder to the outer can causes the compressed gas such as nitrogen or air from the valve stem of the aerosol valve. Can be injected into the inner cylinder, and the compressed gas can be filled from the inner cylinder through the check valve mechanism into the gap between the inner cylinder and the outer can to form a propellant.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The dual aerosol container of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway sectional view showing an embodiment of the double aerosol container of the present invention, and FIG. 2 is a sectional view showing an embodiment of a check valve mechanism in the double aerosol container of the present invention.
FIG. 3 is an explanatory view showing a step of enclosing a propellant in the gap of the double aerosol container of the present invention.

First, the double aerosol container of the present invention is shown in FIG.
It will be explained based on. In FIG. 1, reference numeral 1 denotes a double aerosol container, which is composed of a lid body 2, an outer can 3 and an inner cylinder 4 each having a bottomed cylindrical shape.

An aerosol valve 5 is attached to the center of the lid 2. The outer can 3 comprises a bottom portion 6 and a cylindrical body portion 7, and a neck portion 8 near the upper end of the body portion 7 is made slightly thinner than the body portion 7 by necking.

The lid 2 and the outer can 3 are well known,
It can be made of a metal such as aluminum or tin or a synthetic resin. The aerosol valve 5 is also known, and the contents are ejected from the ejection port by pushing the valve stem 15 downward or inclining it.

On the other hand, the inner cylinder 4 has a bottom portion 9 and a cylindrical body portion 1.
0, and is inserted into the outer can 3 while forming a slight gap 11 around the body 10, and the opening end of the inner cylinder 4 is the edge of the outer can 3 and the periphery of the lid 2. And the lid 2 is clinched to the inner peripheral surface of the outer can 3 to be firmly fixed to the mouth portion. Further, the bottom portion 9 of the inner cylinder 4 has a check valve mechanism 16 for ventilating only the gap from the inner cylinder.
Is provided. As the check valve mechanism 16, various types are conceivable, but for example, a check valve mechanism of an “O” ring type as shown in FIG. That is, it is preferable to use the one in which the communication portion 21 is provided to project from the bottom portion 9 of the inner cylinder 4 and the O-ring 20 is attached to the hole 22 formed in the communication portion 21 because the mechanism is simple. Alternatively, instead of the O-ring 20, FIGS.
As shown in, a ring 23 or 24 having a rectangular cross section may be used, and the long side or the short side of the ring may be attached to the hole 22.

The material of the inner cylinder 4 may be any one that is not affected by the propellant and contents and has appropriate strength and elasticity, and for example, a metal such as thermoplastics or aluminum, or a laminate material is used. be able to.

The outer can 3 and the inner cylinder 4 can be manufactured by a conventional method such as impact molding of aluminum slag.

Next, a process of enclosing the propellant in the double aerosol container constructed as described above and filling the contents will be described.

As shown in FIG. 3, when a compressed gas 17 such as nitrogen or air is filled into the inner cylinder 4 through the valve stem 15 of the aerosol valve 5, the inner cylinder 4 is provided with a bottom portion 9. The compressed gas 17 enters the gap 11 between the inner cylinder 4 and the outer can 3 through the check valve mechanism 16. At this time, due to the action of the check valve mechanism 16, the compressed gas 17 in the gap 11 does not flow back into the inner cylinder 4, but is enclosed in the gap 11 and becomes the propellant 12.

Next, the contents are filled in the inner cylinder 4, but the compressed gas 17 such as nitrogen or air may be contaminated by adhering to the inner surface of the inner cylinder 4 and the valve stem 15. Therefore, it is possible to fill the contents continuously with the above-mentioned compressed gas filling step and using the same valve stem 15 as that used in the step.

In this case, two methods of filling the contents can be considered depending on the difference in the treatment of the compressed gas remaining in the inner cylinder 4. That is, in the first filling method, only the compressed gas in the inner cylinder is discharged from the valve stem 15 by using, for example, a vacuum, and the inner cylinder is completely crushed by the pressure of the compressed gas in the gap. After that, the valve stem 15 is used to fill the contents into the inner cylinder at a pressure higher than the pressure of the compressed gas in the gap. The second filling method is a method of filling the contents at a pressure higher than the pressure of the compressed gas in the inner cylinder without discharging the compressed gas in the inner cylinder. Since a part of the compressed gas is pushed by the contents and enters the gap 11 through the check valve mechanism 16, the pressure of the compressed gas in the gap is slightly smaller than that at the end of the compressed gas charging step. Get higher In any case, the pressure of the compressed gas in the gap after filling the contents is 10 kg / c.
It is preferably set to less than m ² .

Finally, the push button is attached to the valve stem 15 to complete the assembly of the device.

[0024]

According to the double aerosol container of the present invention,
Compressed gas such as nitrogen or air is injected into the inner cylinder from the valve stem of the aerosol valve, and the compressed gas is sealed from the inner cylinder through the check valve mechanism into the gap between the inner cylinder and the outer can to propellant. Can be

As a result, since it is not necessary to provide a sealing port for sealing the propellant in the outer can, the manufacturing cost of the container can be reduced as compared with the conventional one. Also,
Since the same valve stem can be used to fill the contents subsequent to the propellant encapsulation process, the manufacturing process can be simplified. Further, instead of the conventional liquefied gas such as LPG, the cost of materials can be reduced by using a cheap compressed gas such as nitrogen or air as a propellant. Moreover, since nitrogen, air, etc. are highly safe, they are not subject to legal regulations, and the troublesome exhaustion of residual gas at the time of use can be saved.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an example of a double aerosol container of the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of the check valve mechanism in the double aerosol container of the present invention.

FIG. 3 is an explanatory view showing a step of enclosing a propellant in the gap of the double aerosol container of the present invention.

FIG. 4 is a cross-sectional view showing a conventional double aerosol container.

[Explanation of symbols]

 1 Double Aerosol Container 2 Lid 3 Outer Can 4 Inner Cylinder 5 Aerosol Valve 6 (Outer Can) Bottom 8 (Outer Can) Neck 9 (Inner Cylinder) Bottom 11 Gap 12 Propellant 15 Valve Stem 16 Check Valve Mechanism 17 Compression Gas 51 Double aerosol container 53 Outer can 54 Inner cylinder 61 Gap 62 Propellant 63 Filling port

Claims (3)

[Claims] 1. An outer can comprising a bottom, a body having a substantially cylindrical shape, and a neck having a diameter smaller than that of the body, and a gap between the outer can and a propellant to be enclosed. An inner cylinder having a substantially bottomed cylindrical shape, which is inserted into the outer can and has a substantially tightly fitted vicinity to the neck portion in the vicinity of the opening portion, and an aerosol valve are provided, and the opening portion of the inner cylinder is closed. A double aerosol container, comprising a lid provided, wherein the inner cylinder is crushed by the pressure of the propellant to eject the contents when the aerosol valve is opened. A double aerosol container characterized in that a check valve mechanism for ventilating only from the cylinder to the gap is provided, and compressed gas is enclosed as propellant in the gap. 2. The check valve mechanism includes a communication part formed on the bottom of the inner cylinder so as to project, and a rubber or the like attached to the communication part so as to close a hole formed in the communication part. The double aerosol container according to claim 1, comprising a ring having elasticity. 3. The double aerosol container according to claim 1, wherein the compressed gas is a compressed gas of nitrogen or air.