JP2012111549A - Aerosol valve for double aerosol container, and double aerosol container using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol valve for a double aerosol container which prevent the scattering of contents, and to provide the aerosol container using the aerosol valve.SOLUTION: The aerosol valve 13 for the double aerosol container includes: a housing 16 that closes a pressure-resistant container and an inner bag, and includes a center hole 16a through which the contents are made to pass; and a cup-like cap 20 for fixing the housing to the pressure-resistant container. The housing 16 includes: a cylindrical housing body 21; a cylindrical plug 22 formed at the outer periphery of the housing body to close openings of the inner bag and the pressure-resistant container; and a connection part 23 achieving connection between the housing body and the plug. An annular lower groove 25 which opens downward and uses the connection part 23 as a lower groove bottom is formed between the housing body 21 and the plug 23, besides, vertically extending slit-like communication ports 26 are formed in the side face of the housing body 21.

Description

  The present invention relates to an aerosol valve for a double aerosol container and a double aerosol container using the same.

  An aerosol container that fills a pressure-resistant container with contents and a pressurizing agent and discharges the contents with the force of the pressurizing agent can be used for various applications because it can discharge the contents with a simple operation. ing. As such an aerosol container, there is known a double aerosol container in which an inner bag accommodated in a pressure resistant container is filled with contents, and a pressure agent is filled between the pressure resistant container and the inner bag. Since this double aerosol container stores the contents and the pressurizing agent independently, the contents containing the viscous contents or the foaming agent can be discharged as they are. Such double aerosol containers are disclosed in Patent Documents 1 and 2.

Japanese Patent No. 4194552 Japanese Patent No. 4354713 Japanese Patent Application No. 2009-299183

Since such a double aerosol container is discharged as if the inner bag is squeezed by the pressing force of the pressurizing agent between the pressure resistant container and the inner bag, the inner bag is closely filled with the contents. However, in reality, the inner bag is filled with the contents, and then the inner bag is closed with a valve. Therefore, in the manufacturing process, some contents of air (or nitrogen in a nitrogen environment) are placed in the inner bag or the valve. In the case of filling, nitrogen) remains. In particular, when a high-viscosity content is used, it remains as bubbles. In such a double aerosol product, when the user uses the product for the first time, the residual air and the contents travel in the passage as a layer structure, and the residual air gives momentum to the contents at the discharge port. As a result, the contents may be scattered around.
In response to this problem, the applicant has proposed an inner bag having a structure that reduces the volume of the inner bag when a valve is attached to the opening of the inner bag, as shown in Patent Document 3. Yes.
An object of the present invention is to provide an aerosol valve for a double aerosol container and a aerosol container using the same, which prevent scattering of contents by using means different from Patent Document 3.

  The aerosol valve for a double aerosol container according to the present invention is used for a double aerosol container having a bottomed cylindrical pressure resistant container and a bottomed cylindrical inner bag housed in the pressure resistant container. The aerosol valve has a housing having a central hole for closing the pressure vessel and the inner bag and allowing the contents to pass therethrough, and a cup-shaped cap for fixing the housing to the pressure vessel. The housing has a cylindrical housing main body, a cylindrical plug portion formed on the outer periphery of the housing main body, which closes the inner bag and the opening of the pressure vessel, and a connecting portion that connects the housing main body and the plug portion. ing. An annular lower groove portion is formed between the housing body and the plug portion so as to open downward, with the connecting portion as a bottom portion, and a communication port is formed on a side surface of the housing body.

It is preferable that such an aerosol valve has a plurality of communication ports formed in an annular shape at equal intervals. Moreover, it is preferable that the communicating port is a slit shape extended up and down. Furthermore, it is preferable that the upper end of the communication port and the upper end of the lower groove portion (lower groove bottom portion) are provided at the same height. It is preferable that the space of the lower groove portion has a mortar shape that is reduced in diameter toward the bottom of the lower groove.
Furthermore, the plug portion includes a cylindrical inner bag fitting portion that closes the opening portion of the inner bag, and an annular flange portion that is formed at the upper end of the inner bag fitting portion and closes the opening portion of the pressure vessel. It is preferably made of a synthetic resin, and has an annular lower groove bottom portion that opens downward between the housing main body and the inner bag fitting portion of the plug portion and has the connecting portion as a bottom portion.
Furthermore, it is preferable that the lower end of the housing main body is formed with a protruding portion protruding downward.

  The double aerosol container of the present invention includes a bottomed cylindrical pressure resistant container, a bottomed cylindrical inner bag housed in the pressure resistant container, and the aerosol valve of the present invention that closes the pressure resistant container and the inner bag. It is characterized by having.

The aerosol valve for a double aerosol container of the present invention includes a housing having a central hole for closing the pressure vessel and the inner bag and allowing the contents to pass through, and a cup-shaped cap for fixing the housing to the pressure vessel. The housing includes a cylindrical housing main body, a cylindrical plug portion formed on the outer periphery of the housing main body and closing the opening of the inner bag and the pressure vessel, and the housing main body and the plug portion. An annular lower groove portion is formed between the housing body and the plug portion. The annular lower groove portion having the connection portion as a lower groove bottom portion is formed between the housing body and the plug portion, and communicates with a side surface of the housing body. Since the mouth is formed, the lower groove portion guides the contents in the inner bag to the communication opening, and the remaining amount of the contents can be reduced and used up to the end. Even if air remains in the inner bag in the manufacturing process, the lower groove portion also guides the remaining air in the inner bag to the communication port, so that the remaining air can be collected in the housing body. Therefore, after mounting the valve and before mounting the injection member, the valve can be operated to expel the air in the valve. Thereby, when the product is operated for the first time, the contents and the remaining air do not form a layer structure, and the contents can be prevented from scattering.
Further, even when the inner bag is deformed so that the content is reduced and the inner bag is contracted, a passage through which the content flows between the inner bag and the communication port is secured by the lower groove portion, so that the discharge can be performed to the end.

  In such an aerosol valve, when a plurality of communication ports are formed and are provided in an annular shape at equal intervals, introduction of contents into the housing main body and air in the housing main body Pushing out of the housing body is performed more smoothly. Further, when the communication port has a slit shape that extends vertically, the communication port that communicates from the inner bag into the housing body is vertically long, so even viscous contents can be smoothly moved into the housing. . Further, when the upper end of the communication port and the upper end of the lower groove portion are provided at the same height, introduction of contents into the housing body and discharge of residual air outside the housing body are more efficient. Well done. When the space of the lower groove portion is a mortar shape that is reduced in diameter toward the bottom of the lower groove, the remaining air can be more easily guided to the communication port, and the remaining air can be more reliably moved to the housing body and discharged.

  The plug portion includes a cylindrical inner bag fitting portion and an annular flange portion formed at the upper end of the inner bag fitting portion, and the housing body and the inner bag fitting portion of the plug portion In the case where an annular lower groove portion having an opening in the middle and the connecting portion as a bottom portion is formed, the inner bag fitting portion is capable of minute elastic deformation in the direction of the lower groove portion. It can be fitted with the part and hermetically sealed. In particular, when the pressurizing agent is filled, the inner bag fitting portion repels the filling pressure, so that the seal with the opening portion of the inner bag becomes higher and the pressurizing agent can be prevented from entering the inner bag. .

  When a projecting portion projecting downward is formed at the lower end of the housing body, it becomes a support portion when assembling the aerosol valve, and it is easy to incorporate a stem, a spring, a stem rubber and the like.

  The double aerosol container of the present invention includes a bottomed cylindrical pressure resistant container, a bottomed cylindrical inner bag housed in the pressure resistant container, and the aerosol valve of the present invention that closes the pressure resistant container and the inner bag. The contents are not scattered at the start of use.

It is side surface sectional drawing which shows the aerosol container of this invention. 2a and 2b are a side sectional view and a bottom view, respectively, showing the aerosol valve of FIG. 3a, b and c are process diagrams for manufacturing the aerosol container of FIG. It is a bottom view which shows the other form of the aerosol valve of this invention. It is side surface sectional drawing which shows the further another form of the aerosol valve of this invention. It is side surface sectional drawing which shows the other form of the aerosol container of this invention. It is side surface sectional drawing which shows the further another form of the aerosol valve of this invention.

  1 includes a bottomed cylindrical pressure-resistant container 11, a bottomed cylindrical inner bag 12 accommodated in the pressure-resistant container, and an aerosol valve 13 that closes the pressure-resistant container 11 and the inner bag 12. Have. In the aerosol container 10, the content A is filled in the inner bag 12, and the pressurizing agent B is filled in the gap between the pressure-resistant container 11 and the inner bag 12.

As shown in FIG. 3a, the pressure vessel 11 is a rigid container having a bottom, a trunk, a shoulder, and a neck, and an annular recess 11a is formed in the neck. The pressure vessel 11 is an integrally molded product formed from a metal plate such as aluminum or tinplate by impact processing, drawing processing or the like. However, a plurality of members connected by double winding may be used. Moreover, you may shape | mold with the material which has other pressure | voltage resistance, such as a synthetic resin and pressure | voltage resistant glass.
As shown in FIG. 3a, the inner bag 12 is made of a synthetic resin having flexibility, having a bottom portion, a trunk portion, a shoulder portion, a neck portion, and a mouth portion 12a having an enlarged diameter provided at the upper end of the neck portion. is there. When the inner bag 12 is arranged at the bottom of the pressure vessel, the upper end of the mouth of the inner bag 12 is configured to be above the upper end of the neck of the pressure vessel 11. Therefore, when the inner bag 12 is filled with the content A and the pressurizing agent B and the aerosol valve 13 is fixed to the pressure vessel 11, the inner bag 12 is accommodated in the pressure vessel 13 while being bent. The inner bag 12 may be made of a material other than a synthetic resin, for example, a light metal such as aluminum that is bonded in the form of a sheet and formed into a bag shape or a bottomed cylindrical shape. The metal sheet is preferably a composite sheet with a synthetic resin sheet.

  As shown in FIG. 2, the aerosol valve 13 closes the inner bag 12 and the pressure-resistant container 11 and has a housing 16 having a center hole 16a, a stem 17 accommodated in the center hole 16a of the housing so as to be movable up and down, A spring 18 that constantly biases the stem 17 upward, a stem rubber 19 that closes the stem hole 17a of the stem, and a cup-shaped cap 20 that secures the housing 16 to the pressure vessel 11 are provided.

The housing 16 has a bottomed cylindrical housing main body 21, a cylindrical plug portion 22 that is formed on the outer periphery of the housing main body and closes the inner bag and the pressure-resistant container, and a connecting portion that connects the housing main body 21 and the plug portion 22. 23. Between the housing main body 21 and the plug part 22, an annular upper groove part 24 opened upward with the connecting part 23 as a bottom part and an annular lower groove part 25 opened downward are formed. The housing 16 is made of synthetic resin, and the housing main body 21, the plug portion 22, and the connecting portion 23 are integrally formed. However, the housing main body and the plug portion may be separated from each other and connected by the connecting portion 23.

  The inside of the housing body 21 is a cylindrical body having a bottom portion 21a, and three slit-like communication ports 26 extending vertically are formed on the side surface 21b at regular intervals. The slit-shaped communication port 26 may be one, two, four or more. 4A and 4B, 8 and 4 communication ports 26 are provided, respectively. However, in order to efficiently introduce the content A in the inner bag 12 into the housing main body 21, it is preferable to provide two or more at equal intervals. The upper end of the communication port 26 has the same height as the lower surface of the connecting portion 23 that constitutes the lower groove bottom portion of the lower groove portion 25. Thereby, the introduction of the contents from the inner bag 12 and the discharge of the remaining air to the outside of the housing main body can be performed more efficiently. Further, the lower end of the communication port 26 reaches the bottom 21a. By extending the lower end to the bottom 21a in this way, the communication port 26 can be easily formed by injection molding.

  On the inner surface of the housing body 21, six ribs 21c extending in the vertical direction are provided in an annular shape. The number of ribs 21c is not particularly limited as long as two or more ribs 21c are provided in an annular shape. A ring-shaped seal portion 21 d that forms a stem rubber and an annular seal point is formed at the upper end of the housing body 21. Furthermore, a cylindrical projection 21e extending downward from the bottom 21a is formed at the center of the lower end of the housing body 21. A communication hole 21f that communicates with the protruding portion 21e is formed in the bottom portion 21a. The protrusion 21e is provided for assembling the aerosol valve. When the stem 17, the spring 18, and the stem rubber 19 are incorporated into the housing main body 16, the protruding portion 21 e can be easily assembled by being used as a support portion that supports the housing main body 16. However, the protruding portion 21e may not be provided.

The plug portion 22 has a cylindrical inner bag fitting portion 31 that closes the opening (the mouth portion to the neck portion) of the inner bag 12 and an annular flange that is formed at the upper end of the inner bag fitting portion and closes the pressure-resistant container 11. Part 32.
The inner bag fitting portion 31 has a step portion 31a on its upper outer surface, and the inner surface 31b is formed in a taber shape so that the center hole expands downward. That is, the inner bag fitting portion 31 is thinner downward. The inner bag fitting portion 31 is configured to be slightly elastically deformed in the radial direction (in the direction of the lower groove portion 25). The housing main body 21 is disposed inside the inner bag fitting portion 12, and an annular lower groove portion 25 is formed between the inner surface of the inner bag fitting portion 31 and the outer surface of the housing main body 21. The lower end of the inner bag fitting portion 31 is formed to be shorter than the lower end of the communication port 26 of the housing body 21. Since it is constituted in this way, it is easy to introduce the air mixed immediately after filling into the housing and can be easily discharged.
The inner bag fitting portion 31 is a part inserted into the neck portion of the inner bag 12, and the outer diameter of the inner bag fitting portion 31 and the inner diameter of the neck portion of the inner bag 12 are substantially the same. The outer surface of the inner bag fitting portion 31 and the inner surface of the neck portion of the inner bag 12 are configured to be in close contact with each other. And the outer diameter of the step part 31a is comprised so that it may become substantially the same as the internal diameter of the opening | mouth part of the inner bag 12. FIG.

  The flange portion 32 is a portion that protrudes radially outward from the outer surface of the inner bag fitting portion 31, and the lower surface 32 a is disposed at the upper end of the pressure-resistant container 11 through the gasket 11 b. A holding portion 32 b that holds the stem rubber 19 is formed on the inner surface of the flange portion 32. An annular upper groove portion 24 is formed between the inner surface of the flange portion 32 (below the holding portion 32 b) and the outer surface of the housing body 21. Further, the flange portion 32 is configured so as to be slightly elastically deformable in the radial direction (in the direction of the upper groove portion 24).

The stem 17 includes a passage extending downward from the upper end opening, and communicates with the stem hole 17a in the vicinity of the lower end of the passage.
The spring 18 is supported between the lower end of the stem 17 and the bottom portion 21 a of the housing 16.
The stem rubber 19 is ring-shaped and closes the stem hole 17a with a center hole.
The cap 20 is formed in a U-shape with a lower opening from a metal plate such as aluminum, and has a central hole through which the stem 17 is passed.

In the aerosol valve 13 configured in this manner, the housing 16 closes the opening (neck portion) of the inner bag 12 and the opening (neck portion) of the pressure-resistant container 11 and clinches the lower end 20a inward while pressing the cap 20 downward. The housing 16 is fixed to the pressure vessel 11. Further, by pushing down the stem 17 of the aerosol valve 13, the stem hole 17a and the stem rubber 19 are disengaged, and the inside of the housing body 21 and the atmosphere can be communicated.
As a result, the inside of the inner bag 12 also communicates with the atmosphere via the slit-shaped communication port 26. At this time, the slit-shaped communication port 26 extends in the vertical direction and has a sufficiently large opening area. Therefore, even if air remains in the inner bag 12 in the manufacturing process, the air is stored in the housing body 21. Guide efficiently. Therefore, the remaining air does not form a layer structure with the content in the content passage. Therefore, when the operation of the aerosol container 10 is started (the stem is pushed downward), the contents can be prevented from being scattered due to the momentum of the remaining air.

  FIG. 3 shows a method for manufacturing the aerosol container 10. First, the inner bag 12 is inserted into the pressure vessel 11, and the content A is filled in the inner bag 12 (see FIG. 3a). Next, the inner bag fitting portion 31 of the aerosol valve 13 is inserted into the neck portion and the mouth portion of the inner bag 12, and the opening portion of the inner bag 12 is closed. Specifically, the main body of the inner bag fitting portion 31 is inserted into the neck portion of the inner bag, and the mouth portion 12a of the inner bag is inserted into the step portion 31a of the aerosol valve. At this time, since the upper end of the mouth portion 12 a of the inner bag 12 is located above the upper end of the pressure vessel 11, the aerosol valve 13 is held by the inner bag 12 slightly above the pressure vessel 11. In this state, the pressurizing agent B is filled between the pressure-resistant container 11 and the inner bag 12 (undercup filling) (see FIG. 3b). Finally, simultaneously with the undercup filling, the cap 20 is pressed downward, the inner bag 12 is bent and accommodated in the pressure vessel 11, and a seal is formed between the upper end of the pressure vessel 11 and the gasket 11b. The end portion 20a of the cap 20 is caulked so as to be fitted to the annular recess 11a of the pressure resistant container 11, and the aerosol valve 13 is fixed to the pressure resistant container 11 (see FIG. 3c). At this time, the annular recess 11a of the pressure vessel and the step portion 31a of the aerosol valve are engaged via the mouth portion 12a of the inner bag to form a seal, and the upper end of the pressure vessel and the flange portion 32 of the aerosol valve are formed. The lower surface engages with the gasket 11b to form a seal. The force at the end of the cap 20 is supported by the inner bag fitting portion 31 of the plug portion 16 through the annular recess 11a of the outer container. Therefore, the inner bag fitting portion 31 is slightly elastically deformed and holds the cap 20 more firmly by the reaction force.

  The content A filled in the aerosol container of the present invention is not particularly limited, but the effect appears remarkably when the content A having viscosity is filled. Preferred contents include skin care cream, shaving cream, shaving gel, face wash cream, face pack, disinfectant gel, hair cream, hair wax, hair color cream and the like. That is, the content A filled in the inner bag moves along the shape of the housing when the valve housing is inserted into the opening of the inner bag, but since it has viscosity, a gap is easily formed between the contents. The aerosol container of the present invention reliably guides the air in the inner bag to the housing even in such highly viscous contents, and the residual air and the contents do not form a layer in the passage. The scattering of the content A can be suppressed at the start.

The aerosol valve 40 of FIG. 5 is substantially the same as the aerosol valve 13 of FIG. 2 except that the communication port 41 of the housing body is a substantially circular hole, and the housing 16, the stem 17, the spring 18, A stem rubber 19 and a cap 20 are provided. In FIG. 5, the two communication ports 41 are formed so as to face each other, but three or more may be provided or one.
The shape of the communication port may be a polygon such as a substantially triangle or a substantially square. The upper end of the communication port 41 is provided at the same height as the lower groove bottom portion of the lower groove portion 25. Such an aerosol valve 40 is preferably used when filling a low-viscosity content.

The aerosol container 45 of FIG. 6 is an inner bag 46 formed by molding aluminum into a bottomed cylindrical shape, and the others are substantially the same as the aerosol container 10 of FIG. The content A is filled in the inner bag 46, and the pressurizing agent B is filled in the gap between the pressure-resistant container 11 and the inner bag 46.
The inner bag 46 includes a bottom portion, a trunk portion, a shoulder portion, a neck portion, and a mouth portion 46a having an enlarged diameter provided at the upper end of the neck portion, and has flexibility. The main body of the inner bag fitting portion 31 of the aerosol valve is inserted into the neck portion, and the step portion 31a of the aerosol valve is inserted into the mouth portion 46a to connect the inner bag 46 and the aerosol valve 13 to each other.

The aerosol container 50 in FIG. 7 is a pressure-resistant container 51 in which a synthetic resin such as polyethylene terephthalate (PET) is molded into a bottomed cylindrical shape by blow molding, and the others are substantially the same as the aerosol container 10 in FIG. It has an inner bag 12 and an aerosol valve 13, fills the inner bag 12 with the content A, and fills the gap between the pressure vessel 51 and the inner bag 12 with the pressure agent B. It is. However, the aerosol valve 13 is different from the aerosol valve 13 of FIG. 2 in that the protrusion 21e in FIG. 2 is not provided.
The pressure vessel 51 has a bottom portion, a trunk portion, a shoulder portion, a neck portion, and a mouth portion 51a. The outer diameter of the mouth 51a is larger than the outer diameter of the neck. The inner diameter of the mouth 51a is substantially the same as the outer diameter of the neck of the inner bag, and the inner surface is continuous. The neck portion of the inner bag is sandwiched between the inner surface of the mouth portion 51a and the inner bag fitting portion of the housing, and is compressed by the force when the lower end of the cap is crimped inward to provide a sealing action. A stepped portion 52 is formed at the upper end of the inner surface of the mouth portion 51a so as to increase in diameter upward.
The inner bag 12 has a bottom portion, a trunk portion, a shoulder portion, a cylindrical neck portion, and an opening that expands from the upper end of the neck portion. The opening holds the step 31a of the aerosol valve and secures a passage for filling the pressurizing agent between the container body and the flange of the valve when the underfilling of the pressurizing agent is performed. Moreover, since the inner bag fitting portion is slightly bent inward by the filling pressure of the pressurizing agent, a passage is formed between the mouth portion of the pressure vessel and the neck portion of the inner bag. Note that a groove extending in the vertical direction may be provided on the inner surface of the mouth of the container main body to serve as a pressurizing agent filling passage. After filling the pressurizing agent, the valve is pressed against the mouth of the container body and the lower end of the cap is deformed inward and crimped. At this time, the opening portion of the inner bag is formed between the step 52 of the container body and the step of the housing. A seal is formed by being sandwiched between the portions 31a.

A Contents B Pressurizing agent 10 Aerosol container 11 Pressure resistant container 11a Annular recess 11b Gasket 12 Inner bag 12a Mouth 13 Aerosol valve 16 Housing 16a Central hole 17 Stem 17a Stem hole 18 Spring 19 Stem rubber 20 Cap 20a End 21 Housing body 21a Bottom portion 21b Side surface 21c Rib 21d Seal portion 21e Projection portion 21f Slit 22 Plug portion 23 Connection portion 24 Upper groove portion 25 Lower groove portion 26 Communication port 31 Inner bag fitting portion 31a Step portion 31b Inner surface 32 Flange portion 32a Lower surface 32b Holding portion 40 Aerosol Valve 41 Communication port 45 Aerosol container 46 Inner bag 46a Mouth part 50 Aerosol container 51 Pressure-resistant container 51 Mouth part 52 Step part

Claims (8)

An aerosol valve for a double aerosol container comprising a bottomed cylindrical pressure resistant container and a bottomed cylindrical inner bag housed in the pressure resistant container,
A housing having a central hole for closing the pressure vessel and the inner bag and allowing the contents to pass therethrough, and a cup-shaped cap for fixing the housing to the pressure vessel,
The housing includes a cylindrical housing body, a cylindrical plug portion that is formed on an outer periphery of the housing body, closes the inner bag and the opening of the pressure vessel, and a connecting portion that connects the housing body and the plug portion. And an annular lower groove portion is formed between the housing body and the plug portion so as to open downward and have the connecting portion as a lower groove bottom portion.
A communication port is formed on a side surface of the housing body.
Aerosol valve for double aerosol containers. The aerosol valve according to claim 1, wherein a plurality of the communication ports are formed and are provided in an annular shape at equal intervals. The aerosol valve according to claim 1, wherein the communication port has a slit shape extending vertically. The aerosol valve according to claim 1, wherein an upper end of the communication port and a lower groove bottom portion of the lower groove portion are provided at the same height. The aerosol valve according to claim 1, wherein the space of the lower groove portion has a mortar shape whose diameter decreases toward the bottom of the lower groove. The plug portion includes a cylindrical inner bag fitting portion that closes the opening portion of the inner bag, and an annular flange portion that is formed at the upper end of the inner bag fitting portion and closes the opening portion of the pressure vessel. Made of resin,
An annular lower groove portion is formed between the housing body and the inner bag fitting portion of the plug portion, which opens downward and has the connecting portion as a lower groove bottom portion.
The aerosol valve according to claim 1. A protrusion protruding downward is formed at the lower end of the housing body.
The aerosol valve according to claim 1. A double aerosol comprising a bottomed cylindrical pressure vessel, a bottomed cylindrical inner bag housed in the pressure vessel, and the aerosol valve according to claim 1 for closing the pressure vessel and the inner bag. container.

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