JP2929036B2 - Inner cylinder of double aerosol container - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an inner cylinder of a double aerosol container, and more specifically, a propellant such as carbon dioxide, hydrogen, chlorofluorocarbon, LPG, etc. The present invention relates to an improvement in an inner cylinder used when filling a container body from a gap with a flange portion (so-called under cup filling).

[Related Art] Conventionally, a flexible inner cylinder is provided in a container main body, and the inner cylinder is pressed by a propellant filled between the container main body and the inner cylinder, and the contents in the inner cylinder are externally provided. Double aerosol containers designed to squirt into water are widely used in cosmetics, caulks and the like.

In the case of such a double aerosol container, the inner cylinder body,
An inner cylinder having a flange provided at the opening is used, the flange of the inner cylinder is engaged with the bead of the container body, and the mounting cup is clinched from above, so that the bead and the mounting cup are formed. The flange portion is sandwiched between them, and the inner cylinder main body is suspended within the container main body.

In these double aerosol containers, the propellant cannot be filled from the squirt valve. Therefore, for example, as shown in FIGS. 4 and 5, a valve body 53 is fitted in the bottom hole 52 of the container body 51, and the valve body 53 is opened and closed, so that the valve body 53 is located A method of filling with propellant has been adopted. That is, as shown in FIG. 5, the filling nozzle 50 is inserted into the recess 54 of the valve body 53, and the sealing portion 55 is pushed up by the tip of the filling nozzle 50, and the propellant is removed from the sealing portion 55.
The container body is filled from the groove 56 of FIG. After the filling is completed, when the filling nozzle 50 is removed from the recess 54, the sealing portion 55 is pushed down by the action of the pressure in the container body 51 (FIG. 4). And in this state the container body
The inside and outside of 51 are shut off.

However, such a double aerosol container provided with a valve body 53 in the bottom hole 52 is required for the operation of drilling the bottom hole 52 in the container body 51 and the valve body.
Since 53 is required, the manufacturing cost is high, and careful inspection of the bottom hole 52 and work of fitting the valve element 52 into the bottom hole 51 are required, which requires labor and time. Further, dimensional variation occurs between the valve bodies 53, which causes leakage of the propellant.

As a solution to these problems, a so-called under-cup filling method has conventionally been employed in which the propellant is filled into the container body from the gap between the bead portion of the container body and the flange portion of the inner cylinder immediately before clinching the mounting cup. The method is known.

[Problems to be Solved by the Invention] However, in the case of under-cup filling, the propellant may enter the inner cylinder from the gap between the inverted U-shaped groove and the flange, and mix into the contents. An object of the present invention is to provide an inner cylinder of a double aerosol container that can prevent a propellant from entering an inner cylinder as much as possible during filling of the undercup.

[Means for Solving the Problems] To solve the problems, the present invention provides an inner cylinder main body,
A flange provided at the opening of the inner cylinder main body, the flange being engaged with the bead of the container main body, and the mounting cup being clinched from above, whereby the bead and the mounting cup are inverted. In the inner cylinder of the double aerosol container in which the flange is sandwiched between the U-shaped grooves and the inner cylinder main body is suspended in the container main body, the flange portion has a bead portion of the container main body and an inverted U of the mounting cup. A horizontal flange portion sandwiched between the U-shaped grooves, and a rising flange portion rising from the periphery of the horizontal flange portion and abutting from the outside to the outer peripheral edge of the inverted U-shaped groove of the mounting cup. It is.

In the inner cylinder of such a double aerosol container, it is preferable that a plurality of outer ribs that are temporarily engaged with a bead portion of the container main body are further formed on the outer periphery below the opening of the inner cylinder main body.

[Operation] The operation of the inner cylinder of the present invention having the above-described configuration will be described. The rising flange portion of the inner cylinder of the double aerosol container according to the present invention, when engaged with the mounting cup, abuts on the outer peripheral edge of the inverted U-shaped groove and rises so as to cover the inverted U-shaped groove. I have. Therefore, when the propellant is filled from between the flange portion and the bead portion of the inner cylinder, it is difficult for the propellant to enter from between the inverted U-shaped groove and the flange portion.

In the inner cylinder in which a plurality of outer ribs that temporarily engage with the bead portion of the container main body are formed on the outer periphery below the opening of the inner cylinder main body, the outer rib is temporarily engaged with the bead portion. ,
The side surface of the mounting cup can be fitted into the opening of the inner cylinder body. Therefore, the fitting can be performed smoothly.

Further, when the mounting cup is clinched, the inner rib body has a larger diameter by an amount corresponding to the outer rib bulging outward, so that it is possible to prevent a crack from being generated in the inner cylinder body during clinching.

Embodiment Next, an embodiment of the inner cylinder of the present invention will be described with reference to the drawings.

1 to 3 are views showing an embodiment of the inner cylinder of the present invention. FIGS. 1 and 3 are views showing a first embodiment of the present invention. An inner cylinder formed in a container main body 1 in a straight shape from the root of a flange portion 3 of the inner cylinder to a lower portion. The main body 5 is inserted. The inner cylinder body 5 is made of a flexible material such as aluminum foil or a synthetic resin material, and the inner cylinder body 5 is filled with contents 11 to be ejected to the outside.

A flange 3 is formed in the opening of the inner cylinder, and the flange 3 has a horizontal flange 6 sandwiched between the inverted U-shaped groove 4 a of the mounting cup 4 and the bead 2. And a rising flange portion 7 which is continuous with the horizontal flange portion 6 and bent vertically upward. And the rising flange 7 is
It is formed so as to be slightly larger than or close to the outer diameter of the inverted U-shaped groove 4b so as to abut against the outer peripheral edge 4b of the mounting cup 4 from the outside.

The operation of the inner cylinder having the above configuration will be described. As described above, the rising flange portion 7 of the inner cylinder comes into contact with the outer peripheral edge 4b of the inverted U-shaped groove 4a and rises vertically so as to cover the inverted U-shaped groove 4b. Therefore, when filling the propellant, as shown in FIG. 3, the rising flange portion 7 abutting on the outer peripheral edge 4b of the inverted U-shaped groove 4a is pressed from the outside by the jig 9, and the outer peripheral edge 4b and the rising flange are pressed. The part 7 is firmly adhered. Then, the propellant is prevented from being mixed into the contents 11 from the gap between the inverted U-shaped groove 4a and the horizontal flange portion 6.

Thereafter, the horizontal flange portion 6 is lifted by the filling pressure, and the propellant is filled into the gap 10 between the container main body 1 and the inner cylinder main body 5 from the gap between the bead portion 2 and the horizontal flange portion 6. The pressure at this time is 40 kg to 60 kg. then,
Since the rising flange portion 7 is firmly adhered to the outer peripheral edge 4b of the outer peripheral edge 4 of the mounting cup 4, the propellant is prevented from entering the inner cylinder main body 1 from the gap therebetween, and is mixed into the contents 11. Is prevented.

The propellant can be filled without contacting the jig 9 from outside by designing the rising flange portion 7 to be in close contact with the outer peripheral edge 4b of the inverted U-shaped groove 4a. Also in this case, the propellant is prevented from entering from between the rising flange portion 7 and the outer peripheral edge 4b.

After a certain amount of propellant is filled in the container body 1, the side of the mounting cup 4 is
(The side surface of the cup after clinching is indicated by a two-dot chain line in FIG. 3). The operation of clinching the mounting cup 4 completes the operation of storing the contents 11 and the propellant in the container body 1.

FIG. 2 is a view showing a second embodiment of the present invention. The difference from the structure of the inner cylinder of the first embodiment is that a plurality of outer ribs 8a are formed on the outer periphery of the inner cylinder body 5 below the opening. In that it is. The plurality of outer ribs 8a are attached to the mounting cup 4
When the cup side face is fitted into the opening of the inner cylinder body 5,
It temporarily engages with the bead portion 2. Therefore, the side surface of the cup fits smoothly into the inner cylinder body 5. Then, finally, the mounting cup 4 is pressed and inserted into the container main body 1, and at the same time, the outer rib 8a is also inserted into the container main body 1.

Then, just before the cup side surface of the mounting cup 4 is clinched to the bead portion 2, the propellant is lifted from the gap between the bead portion 2 and the horizontal flange portion 6 while the horizontal flange portion 6 is lifted by the filling pressure of the propellant. 1 is filled.

Further, the formation of the outer rib 8a has the following advantages. That is, when the mounting cup 4 is clinched, the opening of the inner cylinder main body 5 is pushed outward by the clinch claw together with the cup side surface of the mounting cup 4, but only by the amount of the outer rib 8a bulging outward. The diameter of the inner cylinder body 5 is increased. Therefore, the inner cylinder main body 5 expands outward with a margin. Therefore, it is possible to prevent the inner cylinder main body 5 from being cracked during clinching.

[Effects] As described above, according to the present invention, since the flange portion of the inner cylinder body is constituted by the horizontal flange portion and the rising flange portion, when the propellant is filled from below the mounting cup, the propeller is used. There is little risk of contamination of the contents with the contents.

Further, in the inner cylinder having the outer rib, the mounting cup can be smoothly fitted to the inner cylinder, and the occurrence of cracks in the inner cylinder main body during clinch can be prevented.

[Brief description of the drawings]

1 to 3 are front sectional views of an embodiment showing an inner cylinder according to the present invention, an aerosol container accommodating the inner cylinder, and a mounting cup, and FIG. 1 shows a first embodiment according to the present invention. FIG. 2 is a front sectional view showing a second embodiment of the inner cylinder, and FIG. 3 is a double aerosol container having an inner cylinder of the first embodiment according to the present invention filled with propellant. It is a front sectional view showing the state where it is. FIGS. 4 and 5 show a conventional double aerosol container, and are front sectional views showing an example in which a valve body is fitted in a bottom hole of the aerosol container. DESCRIPTION OF SYMBOLS 1 ... Container main body 2 ... Bead part 3 ... Flange part 4 ... Mounting cup 4a ... Reverse U-shaped groove 4b ... Outer edge part 5 ... Inner cylinder main body 6 ... Horizontal flange part 7 ... Standing flange part 8. Outer rib

Claims (2)

(57) [Claims] An inner cylinder main body and a flange provided at an opening of the inner cylinder main body, wherein the flange is engaged with a bead of the container main body, and the mounting cup is clinched from above. Thereby, the flange is sandwiched between the bead portion and the inverted U-shaped groove of the mounting cup,
In the inner cylinder of a double aerosol container in which the inner cylinder body is suspended in the container body, the flange portion includes a horizontal flange portion sandwiched between a bead portion of the container body and an inverted U-shaped groove of the mounting cup. An inner flange of a double aerosol container, comprising: a rising flange portion rising from the periphery of the horizontal flange portion and abutting from the outside on the outer peripheral edge of the inverted U-shaped groove of the mounting cup. 2. The double aerosol container according to claim 1, wherein a plurality of outer ribs are formed on the outer periphery of the lower portion of the opening of the inner cylinder body so as to temporarily engage with a bead portion of the container body. Inner cylinder.