JPH0986576A - Inner cylinder of double aerosol container - Google Patents

Abstract

(57) Abstract: An inner cylinder of a double aerosol container in which an inner cylinder having a large outer diameter of the body can be smoothly inserted into the aerosol container without resistance. An inner cylinder of a double aerosol container in which a plurality of folds 3 are formed on the surface of the inner cylinder 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner cylinder of a double aerosol container, more specifically, an inner cylinder made of synthetic resin (hereinafter referred to as "inner cylinder") can be smoothly inserted into the aerosol container without resistance. The present invention relates to the inner cylinder of a heavy aerosol container.

[0002]

2. Description of the Related Art Conventionally, there has been used a double aerosol container for separately storing a content ejected from an aerosol container and a compressed gas for pressurizing an inner cylinder for accommodating the content. Such a double aerosol container has a double structure of a pressure resistant metal container usually made of metal such as aluminum or steel and an inner cylinder crushed by a pressing force of compressed gas. Further, as another double aerosol container, an inner cylinder containing a permanent wave liquid, a hair dye, etc. is provided on the inner peripheral surface of the metal container, so that the corrosion of the metal container due to the contents is prevented. There is a corrosion resistant double aerosol container. In this corrosion resistant aerosol container, the gap between the metal container and the inner cylinder is not filled with compressed gas, and the inner cylinder is in close contact with the inner surface of the metal container for the purpose of preventing the contents from directly contacting the inner surface of the metal container. .

FIG. 6 shows such a conventional double aerosol container. Reference numeral 50 is an aerosol container, and 51 is an inner cylinder having a flat bottom portion to be inserted into the aerosol container 50.
The body and bottom of the aerosol container 50 are integrally molded by impact molding or the like, and then the opening 52 is subjected to necking processing, narrowed down to a diameter smaller than the body outer diameter, and then curled to the tip of the opening 52. Curl part 5
No. 3 is formed. Then, as shown in FIG. 6, the bottom of the inner cylinder 51 is pressed by the pressing force of the insertion rod 54, and the inner cylinder 51 is inserted into the aerosol container 50. Then, after that, the mounting cup and the valve are fixed to the curl portion 53, and the contents are filled in the inner cylinder 51.

[0004]

However, in such an invention, the opening diameter of the curl portion 53 to which the valve for extracting the contents is fixed is constant regardless of the outer diameter of the body portion of the aerosol container 50. Is. This is because the outer diameter of the fixed valve is constant, the pressure resistance is maintained, and the leakage of the contents is prevented. However, in the aerosol container 50 having the large outer diameter of the body portion, the outer diameter of the body portion of the inner cylinder 51 to be inserted is similarly large, and the insertion rod 54 is used to insert the inner cylinder 54 into the inner cylinder 54 as shown in FIG. When the inner cylinder 54 is inserted by pressing the bottom portion, the bottom portion of the inner cylinder 51 is not deformed into a shape that can be easily inserted and maintains a flat shape. Therefore, there is a drawback that the insertion resistance in the curl portion 53 is large and the inner cylinder 51 cannot be smoothly inserted into the aerosol container 50.

The present invention has been made in view of such conventional problems, and provides an inner cylinder of a double aerosol container in which an inner cylinder having a large outer diameter of the body can be smoothly inserted into the aerosol container without resistance. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION To solve this problem, the present invention provides a plurality of essentially inflatable laterally expanding or contracting surfaces on the surface of a flexible inner cylinder suspended within an aerosol container. It is an inner cylinder of a double aerosol container characterized by forming a fold, a plurality of folds, as an example, from the body surface of the inner cylinder to the center of the bottom surface, the double aerosol characterized in that it is formed. It is the inner cylinder of the container.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 5 show an embodiment of the present invention, and show a double aerosol container having an inner cylinder inserted therein, which is crushed by a pressing force of compressed gas into the aerosol container. FIG. 1 shows a double aerosol container of a type in which a curl portion 5 is formed at the tip of an opening 4 of the aerosol container 1, and a valve 7 is fixed below the curl portion 5 via a mounting cup 6. In FIG. 2, the curl portion is not formed at the tip of the opening 11 of the aerosol container 10, and the tip of the opening 11 of the aerosol container 10 is fixed to the valve 12
It shows a double aerosol container of the type in which the valve 12 is fixed by bending it on the top surface. This invention also covers a lid on the opening end of the aerosol container, and does not fill a double aerosol container of a type in which the closure portion of the mouth of the aerosol container is crimped to fix the valve, or compressed gas. It can be applied to the inner cylinder of corrosion resistant double aerosol container.

In the aerosol containers 1 and 10, the body and the bottom are integrally formed by impact molding an aluminum slag. Further, as another method, the body and the bottom may be tightly wound. The inner cylinders 2 and 20 to be inserted into the aerosol containers 1 and 10 are composed of a single layer of polyolefin resin or the like or a multilayer of polyolefin resin and barrier resin or the like. This inner cylinder 2, 20
A plurality of folds 3 and 30 are formed from the front surface of the body portion to the center of the bottom portion. FIG. 3 is a drawing showing the details of the inner cylinder 2. 3 (a) is a front view of the inner cylinder 2, FIG.
FIG. 3B is a bottom view of the inner cylinder 2, and FIG.
3D is an end view showing the line end face, and FIG. 3D is an end view showing the AA line end when the outer diameter of the body portion of the inner cylinder 2 is contracted when it is inserted into the aerosol container 1. is there. As shown in FIGS. 3 (c) and 3 (d), the fold 3 has a recess 3b extending in the longitudinal direction and a raised portion 3a sandwiched between the recesses 3b.
It is composed of And the recess 3 of this fold 3
When the width of b is expanded or contracted, the outer diameter dimension of the inner cylinder 2 below the body portion is appropriately expanded or contracted. In the embodiment shown in FIG. 3, twelve folds 3 are formed at positions where the outer circumference of the inner cylinder 2 is equally divided into twelve. In another embodiment of the inner cylinder 2, as shown in FIG. 4, five folds 3 are formed at positions where the outer circumference of the inner cylinder 2 is equally divided into five.
Needless to say, the number of folds 3 of the inner cylinder 2 can be arbitrarily determined.

Next, the operation of the present invention will be described.
As shown in FIG. 5, when the inner cylinder 2 is inserted into the aerosol container 1, the inner cylinder 2 is placed on the curl portion 5 of the aerosol container 1. Next, the insertion rod 8 is inserted into the inner cylinder 2, and the tip of the insertion rod 8 contacts the inner surface of the bottom of the inner cylinder 2. Then, the insertion rod 8 presses the bottom portion of the inner cylinder 2, so that the inner cylinder 2 is inserted into the aerosol container 1 from below the body portion. At this time, the lower part and bottom surface of the inner cylinder 2 are pulled in the axial direction, and the recess 3b of the fold 3 has a narrow width in the circumferential direction as shown in FIG. 3 (d). As a result, the outer diameter of the inner cylinder 2 on the lower side of the body portion shrinks small. As a result, the inner cylinder 2 is deformed and is inserted into the aerosol container 1 from the bottom without resistance. After that, the mounting cup 6 holding the valve 7 is fixed to the curl portion 5 with the flange portion 2a of the inner cylinder 2 interposed therebetween. Then, the contents are filled from the valve 7 into the inner cylinder 2, and the compressed gas is filled from the bottom of the aerosol container 1. As the content is filled, as shown in FIG. 3 (c), the width of the recess 3 b in the circumferential direction expands due to the filling pressure, so that the content of a desired volume is stored in the inner cylinder 2. Can be filled.

[0010]

[Example] As a result of an insertion test using an inner cylinder having a flat bottom that has been conventionally used, the inner cylinder 2 to be inserted is shown.
The inner cylinder 2 whose outer diameter is 43φ or less has a body outer diameter of 45φ.
The following aerosol container 1 (inner diameter 26.6φ of the curl part)
Could be inserted into. However, it is extremely difficult to insert the inner cylinder 2 into which the outer diameter of the body portion of the inner cylinder 2 to be inserted is 48φ or more into the aerosol container 1 (the inner diameter of the curl portion 2 is 26.6φ) having a body portion outer diameter of 50φ or more. there were. Therefore, when the inner cylinder 2 having a diameter of 48 φ or more was formed into the aerosol container 1 by forming 12 folds 3 on the surface and the bottom of the body, it was possible to insert smoothly without resistance.

[0011]

As described above, according to the present invention, when the inner cylinder is inserted into the aerosol container, the lower part of the body and the bottom surface of the inner cylinder are deformed and the outer diameter is contracted.
The resistance during insertion is significantly reduced. Therefore, even an inner cylinder having a large outer diameter of the body portion can be smoothly inserted into the aerosol container without resistance.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a double aerosol container in which an inner cylinder of the double aerosol container according to the present invention is inserted.

FIG. 2 is a longitudinal sectional view showing another double aerosol container in which the inner cylinder of the double aerosol container according to the present invention is inserted.

FIG. 3 is a front view (a), a bottom view (b), and an AA line end view (c) (d) showing each part of the inner cylinder of the double aerosol container according to the present invention.

FIG. 4 is a front view (a) and a bottom view (b) showing another embodiment of the inner cylinder of the double aerosol container according to the present invention.

FIG. 5 shows an inner cylinder of a double aerosol container according to the present invention,
Sectional drawing which shows the state inserted in an aerosol container.

FIG. 6 is a sectional view showing a state in which the inner cylinder of the conventional double aerosol container is inserted into the aerosol container.

[Explanation of symbols]

 1,10 Aerosol container 2,20 Inner cylinder 3,30 Fold

Claims (2)

[Claims] 1. A double aerosol container comprising a plurality of folds formed on the surface of a flexible inner cylinder suspended in the aerosol container, the folds extending or contracting in a lateral direction. Inner cylinder. 2. The inner cylinder of the double aerosol container according to claim 1, wherein the plurality of folds are formed from the surface of the body of the inner cylinder to the center of the bottom.