JP2004131187A - Propellant filling method for double aerosol device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filling method for a stock liquid and a propellant in a series of lines without damaging advantages of a three-dimensional and synthetic resin-made inner bag and without using a special valve in the same manner as in another inner bag. <P>SOLUTION: A propellant filling mechanism 51 to be used has a downward seal portion 54 contacting and sealing a shoulder portion 6 of a container main body 1, an upward seal portion 55 contacting and sealing a valve 3 and a gas filling passage 56 mounted between the downward and upward seal portions 54 and 55. The propellant is filled from the gas filling passage 56 by inserting the inner bag 2 into the container main body 1, filling the stock liquid into the inner bag 2, sealing a portion between the inner bag 2 and the valve 3 and making the propellant filling mechanism 51 contact the shoulder portion 6 of the container main body 1 and the valve 3. <P>COPYRIGHT: (C)2004,JPO

Description

(4) The present invention relates to a method for filling a propellant in a double-eazor device.

二 重 Conventionally, a double aerosol device in which a flexible or fragile gas barrier inner bag is accommodated inside a pressure-resistant container body. In this product, the inner bag is filled with the undiluted solution, and the propellant consisting of compressed gas is filled between the inner bag and the container body.Therefore, the undiluted solution and the propellant are filled in the container so that they do not mix with each other. Can be. A liquefied gas can also be used as a propellant. As the inner bag in such a double-eazor device, an inner bag having a three-dimensional shape obtained by blow molding a single-layer or multiple-layer synthetic resin sheet, or an aluminum foil or a laminate film of aluminum and a synthetic resin film is used. There is a foldable inner bag formed into a flat bag shape, or an inner bag formed by molding an aluminum sheet into a three-dimensional cylindrical shape with a flange. Various inner bags are employed depending on the combination of the stock solution and the propellant.

In a double aerosol container using a synthetic resin inner bag of the above-mentioned three-dimensional shape, when filling the undiluted solution or propellant, first, hook the inner bag near the opening to the bead portion of the container body The suspension is suspended in the container body, and the inner bag is filled with the stock solution in that state. Next, the mounting cup of the valve is crimped to the bead portion with the vicinity of the opening of the inner bag interposed therebetween to integrate the three members. Furthermore, propellant is filled from a dedicated valve for filling propellant provided at the bottom of the container body or the like. In addition, the applicant has previously provided a check valve at the bottom of the inner bag, which allows fluid to flow only from the inside to the outside, and after integrating the three members of the inner bag, the valve, and the container body, for discharging the undiluted solution. The compressed gas is filled into the inner bag through the valve, and then the container body is placed upside down and the stock solution is filled into the inner bag through the same valve, whereby the compressed gas in the inner bag is transferred to the container body through the check valve. It proposes a method of pushing it into the space between the bags. However, this method requires a check valve in the inner bag and also requires a complicated process such as turning the container upside down in the filling process.

In the case of a double aerosol device using a foldable inner bag, the upper end opening of the inner bag is airtightly fixed to the lower part of the valve housing, and the folded inner bag inserted into the container body is closed. The undiluted solution can be filled through the valve, and the propellant can be filled under the cup from the gap between the valve and the opening of the container body. In that case, there is no need to provide a valve for filling the propellant at the bottom of the container body.

Also, when using the aluminum cylindrical inner bag, since the outer shape of the inner bag is smaller than the opening of the container body, the inner bag previously filled with the undiluted solution in the valve is fixed separately from the container body, and thereafter, The inner bag is held so as to be hung in the container body, and the propellant can be filled with the undercup from the gap between the opening of the container body and the inner bag. Also in this case, there is no need to provide a dedicated valve at the bottom of the container body.

Since the inner bag made of synthetic resin in the three-dimensional form described above can be made relatively thick, gas is less likely to leak than a foldable inner bag or an aluminum cylindrical inner bag, and the undiluted solution is sufficiently supplied. Can be protected. Furthermore, since it has flexibility, it is possible to use a material that is larger than the opening of the container and is in contact with or close to the inner surface of the container body, so that the capacity is large. However, on the other hand, since the propellant is filled after integrating the three components as described above, it is necessary to provide a dedicated valve at the bottom of the container body or the inner bag, which increases the cost of manufacturing and mounting the valve, and further increases the cost. There is a problem that the stock solution and the propellant cannot be filled in the filling line.

The present invention does not detract from the advantages of the three-dimensional plastic inner bag, and can omit a dedicated valve like other inner bags, and a method for filling the undiluted solution and the propellant in a series of lines. Providing it is a technical issue.

The filling method (Claim 1) of the present invention provides a pressure-resistant container main body, a flexible soft resin inner bag whose upper end is fitted around the upper end opening of the container main body, A valve having a mounting cup for holding the vicinity of the upper end of the bag between the upper end opening of the container body, a propellant filled between the container body and the inner bag, and a stock solution filled inside the inner bag. A method for filling a propellant with a propellant filling mechanism between the container main body and the inner bag when manufacturing a double aerosol apparatus consisting of: abutting a shoulder of a container main body as the propellant filling mechanism. A lower seal portion that seals with a valve, an upper seal portion that contacts and seals the valve, and a gas filling passage that is provided between the upper and lower seal portions, using an inner bag inside the container body. Insert and inside Is filled with the undiluted solution, the space between the inner bag and the valve is sealed, the propellant filling mechanism is brought into contact with the shoulder of the container body and the valve, and the propellant is filled from the gas filling passage. It is characterized by:
Further, it is preferable that the vicinity of the upper end of the inner bag and the side wall of the mounting cup be fitted airtightly (claim 2).

The propellant filling method of the present invention uses a wall back type inner bag with a large capacity, but is filled with propellant by under cup filling, so a valve dedicated to filling is provided at the bottom of the container body. There is no need to provide such an apparatus, and an aerosol apparatus can be manufactured on a series of manufacturing lines using a conventional filling and crimping apparatus.

Next, the filling method of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part showing an assembling state of an embodiment of a double eazole container used in the filling method of the present invention, FIG. 2 is a cross-sectional view of a main part showing a state in the middle of assembling, FIG. FIG. 4 is a cross-sectional view showing an entire embodiment of the manufactured double-eazor device after assembly, FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, FIG. 6, FIG. 8 is a cross-sectional view showing another embodiment of the valve relating to the double azole, FIG. 9a is a cross-sectional view of an essential part showing another embodiment of the inner bag relating to the double azole, and FIG. 9b is a IV-IV of FIG. Line sectional view, FIG. 10 is a cross-sectional view of a main part showing a propellant filling step of a double eazole container provided with the inner bag, FIG. 11 is a process diagram showing an entire embodiment of the propellant filling method of the present invention, FIG. 12 is an enlarged sectional view showing the gas filling method of the present invention, and FIGS. 13B and 13B are a side view and a bottom view, respectively, showing still another embodiment of the valve relating to the double aerosol, FIG. 14 is a perspective view seen from below the valve, and FIG. 15 is still another embodiment of the aerosol container. FIG.

First, an embodiment of the aerosol container will be described with reference to FIG. In the aerosol container A shown in FIG. 1, reference numeral 1 is a bottomed cylindrical container main body, 2 is an inner bag, and 3 is a valve. As shown in FIG. 4, the container main body 1 is a bottomed cylindrical metal pressure-resistant container provided with an opening 4 at the upper end. In the present embodiment, a single metal plate made of aluminum or the like is attached to a cylindrical body. It is integrally molded into a bottomed cylindrical shape comprising a portion 5, a conical shoulder portion 6 provided near the upper end thereof, and a bottom portion 7 closing the lower end of the body portion 5. At the upper end of the shoulder portion 5, a bead portion 8 curled outward is provided. This can be manufactured by a conventionally known manufacturing method such as deep drawing, mouth drawing, and curling. Note that a three-piece can or the like in which a shoulder (dome) and a bottom are joined to both ends of a cylindrical body wound with a metal plate may be used.

The inner bag 2 is a flexible bag having a three-dimensional shape made of a soft synthetic resin having gas barrier properties. Like the container main body 1, the inner bag 2 has a substantially cylindrical body 9, a conical shoulder 10 and A bottom 11 is provided. Further, a cylindrical neck portion 12 is provided at the upper end of the shoulder portion, and a disk-shaped flange portion 13 that projects outward is provided at the upper end. The length L of the neck portion 12 is to provide room for moving the inner cylinder 2 up and down while the inner cylinder 2 is housed in the container body 1 for filling the under cup. In the state of the manufactured aerosol apparatus shown in FIG. 4, the inner space K1 of the inner bag 2 is filled with the undiluted solution G to be ejected to the outside through the valve 3, and the gap space K2 between the container body 1 and the inner bag 2 is formed. Is filled with a propellant such as a compressed gas. When the compressed gas is used as the propellant, the ratio between the internal space K1 and the gap space K2 is usually about 80:20 to 50:50, and preferably about 70:30 to 60:40.

As shown in FIG. 1, the outer diameter D1 of the neck portion 12 is set to a size that loosely fits into the inner diameter of the bead portion 8 of the container body 1 or a size that leaves a gap. The body portion 9 of the inner bag 2 is larger than the inner diameter of the bead portion 8 of the container body 1, and in this embodiment, is backed up by the inner surface of the body portion 5 of the container body 1 when the inner bag 2 is filled with the undiluted solution. , Slightly smaller than the body 5 of the container body 1. From this point, the inner bag 2 is a so-called wall back type inner bag. However, the body 9 of the inner bag 2 may have a sufficiently smaller diameter than the body 5 of the container body 1. The inner bag 2 can be formed by, for example, blow molding or the like, similarly to the conventional inner bag. Normally, the body 9 of the inner bag 2 is provided with a vertical groove 14 for guiding the propellant between the inner bag 2 and the container body 1 as shown in FIG. When the inner bag 2 is crushed, the concave groove 14 also has a function of securing a vertical passage through which the stock solution flows.

The inner bag 2 having flexibility means that at least the body 9 of the inner bag 2 can be inserted into the inside of the container main body 1 through the opening 4 and the body 9 is pressed by the propellant. It means that deformation is possible to the extent that it is flattened and crushed. The material of the inner bag 2 is not particularly limited, and is, for example, a synthetic resin such as polyethylene or polyamide resin (nylon), a laminated resin thereof, or a laminated resin of a resin and an aluminum foil. The same ones as those used in (1) can be adopted. The thickness of the inner bag 2 is preferably, for example, about 0.2 to 0.6 mm, but the neck 12 and the flange 13 are 0.2 to 1.0 mm, the body 9 is 0.2 to 0.6 mm, and the bottom is May be varied from 0.5 to 1.0 mm.

The valve 3 includes a mounting cup 15 for closing the opening 4 of the container body 1, a housing 16 and a stem rubber 17 held by the mounting cup 15, and a lower portion of a stem 18 is slidable vertically in the housing 16. Further, a spring 19 for constantly urging the stem 18 upward is accommodated in a lower portion of the housing 16.

The mounting cup 15 is a press-formed product made of a metal plate, and a cover portion 20 having a U-shaped or arc-shaped cross section that covers the bead portion 8 of the container body 1 through the flange portion 13 of the inner bag 2 around the periphery thereof. It is provided to open. A gasket 21 is accommodated in the covering portion 20. However, when the flange portion 13 of the inner bag 2 has a sufficient seal, the gasket 21 can be omitted. The inner peripheral side of the cover portion 20 extends downward as it is to form a cylindrical side wall portion 22, which extends inward from the lower end thereof, and has a bottom portion 23 provided therein. The section 24 is provided so as to stand up. An opening through which the stem 18 passes is formed in the center of the upper bottom portion 25 of the housing holding portion 24.

The outer diameter D2 of the side wall 22 of the mounting cup 15 is somewhat larger than the inner diameter D3 of the neck 12 of the inner bag 2 in the present embodiment, so that the neck 12 of the inner bag 2 stops tight. It is mated. More specifically, when the inner bag 2 is put on the outer peripheral surface of the side wall portion 22 of the mounting cup 15, the inner bag 2 is so dimensioned that the frictional force can sufficiently hold the weight of the inner bag 2 filled with the stock solution G. The length L of the neck portion 12 of the inner bag 2 allows the inner bag 2 to move up and down when the under cup is filled as described above, but also has a function of making the frictional force sufficiently large. Further, the outer diameter of the flange portion 13 of the inner bag 2 is slightly larger than the inner diameter of the outer wall 26 of the cover portion 20 of the mounting cup 15, so that a frictional force for maintaining the weight of the inner bag 2 is generated at this portion. However, the frictional force with the side wall 22 is larger and important.

The housing 16, stem rubber 17, stem 18 and spring 19 of the valve 3 may be any of conventionally known ones. In the present embodiment, the housing 16 has a cylindrical shape with a bottom made of a synthetic resin, is provided with a protruding portion 27 that engages with the housing holding portion 24 of the mounting cup 15 around the upper end, and a communication hole 28 and a communication hole 28 at the lower end. A cylindrical dip tube mounting portion 29 is provided. Although a dip tube is not particularly necessary in the double-eazor device, a dip tube may be provided to secure a passage for discharging the undiluted solution after the inner bag 2 is crushed. The stem rubber 17 is a disc-shaped elastic member made of rubber or soft synthetic resin having an inner hole fitted on the outer periphery of the stem 18. The stem 18 has a cylindrical shape having an internal passage 30 at an upper portion serving as a passage at the time of spouting of the undiluted solution. A groove 33 is provided for engaging the portion 32 and the spring 19. A small hole 34 communicating with the internal passage 30 is provided in the inner bottom of the annular groove 31.

As described above, in the aerosol container A, the point where the neck portion 12 and the flange portion 13 are provided in the inner bag 2 and the dimensions thereof are set to specific fitting dimensions in relation to the dimensions of the covering portion 20 of the mounting cup 15. There is a feature in the set point, and the other parts can be the same as the conventional ones. Next, a method of filling the undissolved solution and the propellant into the aerosol container A configured as described above will be described with reference to FIGS.

(1) First, the inner bag 2 is put into the inside of the container body 1 through the opening 4 by utilizing its flexibility, and the flange 13 is hung on the bead portion 8 (the state shown by the solid line in FIG. 1). In this state, an undiluted solution (reference numeral G in FIG. 4) is filled through the opening of the inner bag 2. As can be seen from this, in the present embodiment, the flange portion 13 and the neck portion 12 have such strength and rigidity that the weight of the stock solution can be sufficiently supported.

Next, the valve 3 is put on the upper end of the container body 1, and the side wall 22 of the mounting cup 15 is fitted into the neck 12 of the inner bag 2. At this time, the side wall portion 22 and the neck portion 12 are firmly fitted, and the weight of the stock solution G can be sufficiently supported. In this state, the valve 3 is slightly lifted, and the flange portion 13 of the inner bag 2 is floated from the bead portion 8 as shown in FIG. Then, the propellant is filled between the container body 1 and the inner bag 2 from the gap P with an under cup. At this time, the neck 12 of the inner bag 2 and the side wall 22 of the mounting cup 15 are fitted airtightly. Therefore, when the propellant is filled at a high pressure, it does not enter the inside of the inner bag 2. Reference numerals 36 and 37 in FIG. 2 denote filling devices which also serve as devices for crimping the mounting cup 15 to the bead portion 8. As the propellant, a compressed gas obtained by compressing an inert gas such as nitrogen, air, carbon dioxide, and helium is usually used. However, in some cases, a liquefied gas such as propane or butane may be used.

After the filling of the propellant is completed, the valve 3 is lowered, the gasket 21 and the flange portion 13 of the inner bag 2 are pressed against the bead portion 8 by the cover portion 20, and the side wall portion 22 of the mounting cup 15 is partially crimped by the crimping device 37. A crimping process is performed to protrude inward. Thereby, as shown in FIG. 3, the mounting cup 15, that is, the valve 3, is fixed to the bead portion 8 of the container body 1. The airtightness between the inner bag 2 and the side wall 22 of the valve 3 and the space between the container body 1 and the inner bag 2 are kept airtight. Thereby, the aerosol container A is assembled and the aerosol device is completed.

As described above, in the manufacturing method of the present embodiment, the propellant can be filled by filling the under cup even though the inner bag 2 of the wall back type is employed. There is no need to provide a valve dedicated to filling, and the filling and crimping devices 36 and 37 can be almost the same as those of other aerosol devices, and the aerosol device can be manufactured in a series of lines.

Figure 6 shows another embodiment of a valve used in d Yazoru container. In this valve 38, the mounting cup 15 is formed from a laminated metal plate in which a synthetic resin film 39 is laminated on the inner surface side of the metal plate (the inner side of the azole container). As the synthetic resin film 39, a single film or a laminated film of a resin such as polyethylene terephthalate (PET), polyamide resin (nylon), and polypropylene (PP) having a thickness of about 20 to 200 μm can be used. In the housing 16 of the valve 38, the dip tube mounting portion (see reference numeral 29 in FIG. 1) is omitted, and four to six slits 40 are radially arranged as passages for the undiluted solution. This slit 40 is particularly convenient when filling a high-viscosity undiluted solution and when ejecting it.

When such a valve 38 is employed, in addition to the flange portion 13 of the inner bag 2, the synthetic resin film 39 seals between the mounting cup 15 and the bead portion 8 of the container body 1, so that the gasket ( It is not necessary to use the reference numeral 21) in FIG. 1, which facilitates the assembling work of the aerosol container. Further, when the gasket 21 is provided, the elasticity of the inner bag 2 may make it easier to come off from the side wall 22 of the mounting cup 15, but in this embodiment, since the gasket 21 is not used, the holding force of the inner bag 2 is maintained. Is further improved.

バ ル ブ The valve 42 shown in FIG. 7 is characterized in that a rubber lining 43 is provided from the inner surface of the cover 20 of the mounting cup 15 to the side wall 22. The rubber lining 43 preferably has a thickness of about 0.5 to 1.0 mm. The rubber lining 43 is different from the gasket 21 which is an independent component. For example, after the mounting cup 15 is press-molded, an unvulcanized rubber is applied and then vulcanized to be integrated with the metal plate of the mounting cup 15. Things. Note that a soft synthetic resin may be used instead of rubber.

When the inner bag 2 is fitted around the side wall 22, the valve 42 has a large frictional force between the inner bag 2 and the rubber lining 43. Therefore, there is an advantage that the weight of the stock solution can be held more reliably. Further, the sealing property between the inner bag 2 and the mounting cup 15 can be further improved.

The valve 45 shown in FIG. 8 is provided with ribs 46 and 47 extending laterally, that is, extending in the circumferential direction on the inner surface of the outer wall 26 of the cover portion 20 of the mounting cup 15 and the lower portion of the side wall portion 22. The ribs 46 and 47 may be formed partially or completely in a ring shape. Further, it may be provided on only one of the inner surface of the outer wall 26 and the side wall portion 22. Also in this valve 45, when the inner bag 2 is fitted to the outer periphery of the side wall portion 22, the inner bag 2 and the ribs 46 and 47 are firmly engaged, so that the force for holding the inner bag 2 is increased. There is an advantage that can be.

In the manufacturing method of the above embodiment, the flange 13 of the inner bag 2 is hooked on the bead portion 8 of the container body 1 and the undiluted solution G is filled from the opening of the inner bag 2. The stock solution may be filled from the internal passage 30 of the stem 18 of the valve 3. The weight of the inner bag 2 is held by the frictional force between the inner peripheral surface and the outer peripheral surface of the side wall 22 of the mounting cup 15. And the weight can be held by the force of the adhesive.

The inner bag 2A shown in FIGS. 9a and 9b has substantially the same form as the inner bag 2 of FIG. 1, and has a substantially cylindrical body 9, a conical shoulder 10 and a bottom. The shoulder 10 has a cylindrical neck 12 at the upper end, and a flange 13 at the upper end. The feature of the inner bag 2A is that a vertical groove 48 is formed from the neck portion 12 to the shoulder portion 10. The groove 48 is preferably provided in a range from the lower half of the neck 12 to the upper third of the shoulder 12.

1 to 10, preferably 4 to 8 grooves 48 are provided at equal intervals on the outer peripheral surface of the inner bag 2A. Note that the groove 48 is formed by partially reducing the thickness of the inner bag 2 and is not formed by changing the thickness without changing the thickness unlike the concave groove 14 of FIG. That is, the inner surface of the neck portion 12 is fitted to the side wall portion 22 of the mounting cup 15 as shown in FIG. The depth Dp of the groove 48 is, for example, about 1/5 to 1/3 of the thickness T of the neck portion of the inner bag, and more preferably about 1/4. The width W of the groove 48 is, for example, about 0.5 to 5 mm.

内 The inner bag 2A configured as described above can be used as it is in the filling method shown in FIGS. That is, as shown in FIG. 10, when the inner bag 2A is fitted into the side wall portion 22 of the valve 3 and the propellant is filled from the gap P by slightly lifting it up from the bead portion 8 of the container body 1, the groove 48 is formed in the bead portion 8 The propellant penetrates smoothly into the gap K2 between the container main body 1 and the inner bag 2 through the groove 48 because of the communication from the upper side to the lower side. Therefore, the filling operation is easy, and conversely, even if the inner bag 2A and the container body 1 are tightly fitted, a smooth filling is ensured.

After filling with the propellant, the valve 3 is lowered to bring the covering portion 20 of the mounting cup 15 into contact with the bead portion 8 of the container body 1 so that the upper portion of the neck portion 12 having no groove 48 contacts the inner surface of the bead portion 8. Touch As a result, vertical communication by the groove 48 is eliminated, and airtightness is ensured.

FIG. 11 shows the entire process of an embodiment of the propellant filling method of the present invention. In the step S1 before filling with gas shown in the left end of FIG. 11, the inner bag 2 is inserted into the container body 1, the inner space K1 of the inner bag 2 is filled with the undiluted solution, and the valve 3 is placed at the upper end of the inner bag 2. Is fitted. In this step S1, the valve 3 has not been crimped yet. In this embodiment, when the upper flange portion of the inner bag 2 is hooked on the bead portion of the container body 1, the bottom 11 of the inner bag 2 has a height supported by the bottom 7 of the container body 1 or the ribs formed thereon. ing. Therefore, the weight of the stock solution filled in the inner bag 2 is supported not only by the flange portion 13 but also by the bottom portion 11. Therefore, the inner bag 2 is stable.

Further, in this step S1, a filling / crimping device 53 provided with a hold mechanism 50 for holding the valve 3, a propellant filling mechanism 51, and a crimp mechanism 52 for crimping the valve is placed on top of the container body 1 or the like. ing. As shown in detail in FIG. 12, the propellant filling mechanism 51 includes a lower seal portion 54 that contacts and seals the shoulder portion 6 of the container body 1 and an upper seal portion that contacts and seals the cover portion 20 of the valve 3. 55, and has a gas filling passage 56 communicating between the two seal portions 54, 55. The hold mechanism 50 is combined with the upper seal portion 55, and both of them can slide up and down with respect to the lower seal portion 54. Each of the seal portions 54 and 55 may be formed of a ring of an elastic material such as a soft resin or rubber.

Returning to FIG. 11, after the above-described pre-filling step S1, the filling / crimping device 53 descends, and the lower seal portion 54 comes into contact with the shoulder portion 6 of the container body to press and seal, and at the same time, the holding mechanism 50 Is fitted to the outer periphery of the valve cover 20 to seal and hold the valve.

Then, while the shoulder portion 6 is held down by the lower seal portion 54, the upper seal portion 55 and the hold mechanism 50 slightly rise to lift the valve 3 and the inner bag 2 fitted to the valve 3, and to fill the gas. Step S3 of filling a compressed gas such as a nitrogen gas from the passage 56 is performed. At this time, even if the valve 3 is lifted, the container body 1 does not rise because it is pressed by the lower seal portion 54.

At that time, as shown in detail in FIG. 12, the cover portion 20 of the valve 3 is sealed with the upper seal portion 55, and the shoulder portion 6 of the container body 1 is sealed with the lower seal portion 54. The space between the inner bag 2 and the valve 3 is sealed by the close contact between the inner surface of the neck 12 of the inner bag 2 and the side wall 22 of the mounting cup. When the valve 3 is lifted, the flange 13 of the inner bag 2 is separated from the bead portion 8 of the container body 1. Therefore, the compressed gas passes between the neck portion 12 and the bead portion 8 and fills the gap space K2 between the inner bag 2 and the container body 1.

As shown in step S3 of FIG. 11, the bottom 11 of the inner bag 2 is separated from the bottom 7 of the container body 1 at this time. However, the inner bag 2 may be configured to be somewhat extendable in the vertical direction so that the bottom portion 11 of the inner bag 2 does not separate from the bottom portion 7 of the container body 1 even if the flange portion 13 is raised by, for example, about 2 to 3 mm. By doing so, the inner bag 2 can be stably held. In order to make the inner bag 2 vertically expandable and contractable, the inner bag 2 itself may be flexed by elastic deformation. However, a shape that increases the amount of deformation by, for example, partially forming a bellows shape may be used. it can.

Then, as shown in the step S4 at the right end of FIG. 11, while maintaining the above-mentioned sealing state, the upper seal portion 55 and the hold mechanism 50 descend to press the valve 3 against the upper surface of the bead portion 8, and the crimp mechanism 52 The collet 57 is lowered and expanded to crimp the valve 3 to the container body 1. At this time, the inner bag 2 is simultaneously sandwiched between the covering portion 20 and the bead portion 8, and the internal space K1 of the inner bag 2 and the gap space K2 between the inner bag 2 and the container body 1 are sealed. After that, the collet 57 is narrowed again, and the filling / crimping device 53 is raised to wait for the next loading of the container body.

The valve 3 shown in FIG. 12 is provided with a degassing member 58 provided with a sharp projection for breaking the inner bag 2 below the housing 16. As shown in detail in FIG. 13A and FIG. 13B, the degassing member 58 is a member made of, for example, a synthetic resin provided with triangular pyramid pointed protrusions 59 at four corners on the lower surface of a substantially square plate. A hole 60 is provided at the center to allow the housing 16 to pass therethrough. FIG. 13 is a perspective view seen from below to clearly show the shape of the sharp protrusion 59. In FIG. 12, the degassing member 58 is fixed to the housing 16 with a retaining ring 61.

In a conventional double aerosol container provided with a dedicated valve for filling the propellant at the bottom of the conventional container body 1, the valve can be used for degassing, but in the case of the aerosol container of the present invention, the dedicated valve is used. It is useful to provide such a degassing member 58 because it is not provided.

In the case of the aerosol container shown in FIG. 15, the inner bag 2 has a bottom portion 11 attached to the bottom portion 7 of the container body 1, the flange portion 13 is located 2-3 mm above the bead portion 8, and a gap P is formed. ing. Therefore, even when the valve 3 is lifted in the gas filling step S3 in FIG. 11, the weight of the stock solution is supported by the container body 1 and is stable. In the step S4 of crimping the valve 3 on the container body 1, the inner bag 2 may be elastically bent in the vertical direction when the valve 3 is pressed downward.

It is principal part sectional drawing which shows the state before assembly of one Embodiment of a double aerosol container. It is principal part sectional drawing which shows the state in the middle of the assembly of the aerosol container. It is principal part sectional drawing which shows the state after the assembly of the aerosol container. It is a longitudinal cross-sectional view which shows the whole double-eazole apparatus. FIG. 5 is a sectional view taken along line VV of FIG. 4. It is an important section sectional view showing other embodiments of a valve used for a double aerosol container. It is principal part sectional drawing which shows the further another embodiment of the valve used for a double aerosol container. It is principal part sectional drawing which shows the further another embodiment of the valve used for a double aerosol container. FIG. 9a is a sectional view of an essential part showing another embodiment of the inner bag according to the present invention, and FIG. 9b is a sectional view taken along line IV-IV of FIG. 9a. FIG. 10 is a cross-sectional view of a main part showing a propellant filling step of the double eazole container provided with the inner bag of FIG. 9. It is a flowchart showing the whole of one embodiment of the manufacturing method of the present invention. FIG. 12 is an enlarged cross-sectional view illustrating a propellant filling step in the manufacturing method of FIG. 11. 13a and 13b are a side view and a bottom view, respectively, showing still another embodiment of the valve according to the present invention. It is the perspective view seen from the lower side of the valve. It is sectional drawing which shows other embodiment of the aerosol container of this invention.

Explanation of reference numerals

A Double azole container 1 Container body 2 Inner bag 3 Valve 8 Bead portion 12 Neck portion 13 Flange portion 15 Mounting cup 38 Valve 39 Synthetic resin film 42 Valve 43 Rubber lining 45 Valve 46 Rib 47 Rib S1 Step before filling S2 Hold valve Step S3 Step of lifting the valve and filling with gas S4 Step of crimping the valve

Claims (2)

A pressure-resistant container main body, an inner bag made of a soft synthetic resin having flexibility in which the vicinity of the upper end is fitted around the upper end opening of the container main body, and the upper end of the inner bag near the upper end opening of the container main body. A valve having a mounting cup sandwiched therebetween, a propellant filled between the container body and the inner bag, and a double eazor device comprising a stock solution filled inside the inner bag, A method of filling a propellant with a propellant filling mechanism between a container body and an inner bag,
A lower seal portion that contacts and seals the shoulder of the container body as the propellant filling mechanism, an upper seal portion that contacts and seals the valve, and a gas charging passage provided between the upper and lower seal portions. Use what you have,
Insert the inner bag inside the container body,
Filling the undiluted solution inside the inner bag,
Seal between the inner bag and the valve,
The propellant filling mechanism is brought into contact with the shoulder of the container body and the valve,
A propellant filling method for filling the propellant from the gas filling passage. 2. The filling method according to claim 1, wherein the vicinity of the upper end of the inner bag and the side wall of the mounting cup are airtightly fitted.

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