JP6547207B2 - Aerosol container - Google Patents

Description

  The present invention relates to aerosol containers.

  The aerosol container which consists of a container main body and a valve assembly which closes the opening part accommodates the contents which have internal pressure, and a strong seal structure is provided between the container main body and the valve assembly. It is generally known that a seal material is disposed between the upper end of the container body and the flange portion of the valve assembly disposed above the container body, and the seal material is vertically compressed as the seal structure of the aerosol container. (Patent Document 1). In addition, a seal material (particularly, an O-ring) is disposed between the inner surface of the container body made of synthetic resin and the plug inserted into the opening of the container body, and a seal structure in which the seal material is compressed laterally is known. (Patent Document 2).

JP-A-7-309382 International Publication WO 2014/77273

In the case of the aerosol container of Patent Document 1, the cross section is rectangular, and the mounting cup of the aerosol valve (valve assembly) is firmly crimped to the container main body in a state where the ring-shaped sealing material is compressed vertically. doing. However, in the case of using a container body made of synthetic resin, it is difficult to obtain sufficient sealing performance for a sealing material having a rectangular cross section since the top surface of the opening is flat, and it is easy to leak. Therefore, usually, on the top surface of the container body made of a synthetic resin, an annular protrusion whose tip is pointed is provided so that the seal material can be partially compressed. When the mounting cup is caulked, the seal material is pressed against the top surface of the container body to form a strongly compressed annular wire seal. However, if the pressure is too strong, there is a problem that the sealing material is broken at the time of caulking, or the content penetrates over time in the thinned portion to lose the elastic property of the portion and cut. In addition, when the sealing material having a rectangular cross section is pressed against the top surface of the container body, there is a problem that the position is easily shifted, and the sealing structure can not be formed reliably.
On the other hand, in the case of the aerosol container of Patent Document 2, since the O-ring is inserted into the container body while being compressed, the position of the O-ring may be displaced due to friction with the container body, or the O-ring itself may twist. The seal structure may be sweetened.
The aerosol container of the present invention aims to provide an aerosol container having a novel seal structure.

  The aerosol container according to the present invention is an aerosol container comprising a container body made of synthetic resin and a valve assembly attached to the opening, wherein the cylindrical inner wall into which the valve assembly is inserted into the opening. A first seal member comprising: an annular canopy covered on the upper end of the opening; and a cylindrical outer wall covering the outer periphery of the opening, the first sealing member sealing between the inner surface and the inner wall of the opening. And a second sealing material for sealing between the upper surface of the opening and the canopy, and a third sealing material for sealing between the outer surface and the outer wall of the opening. .

  In the aerosol container of the present invention, it is preferable that the first sealing material, the second sealing material, and the third sealing material be integrally formed. In that case, it is preferable to make the degree of compression of the first seal material higher than the degree of compression of the second and third seal materials. However, the second seal material and the third seal material may be integrally formed and be independent of the first seal material. In that case, it is preferable to make the first seal material an O-ring.

  The aerosol container according to the present invention is an aerosol container comprising a container body made of synthetic resin and a valve assembly attached to the opening, wherein the cylindrical inner wall into which the valve assembly is inserted into the opening. A first seal member comprising: an annular canopy covered on the upper end of the opening; and a cylindrical outer wall covering the outer periphery of the opening, the first sealing member sealing between the inner surface and the inner wall of the opening. And a second sealing material for sealing between the upper surface of the opening and the canopy, and a third sealing material for sealing between the outer surface and the outer wall of the opening. A highly sealed aerosol container can be produced. In addition, since the second seal material or the third seal material separates the first seal material between the undiluted solution of the contents (aerosol composition) and the pressurizing agent, the second seal material by penetration of the undiluted solution and the internal pressure Or the fall of the elastic characteristic (sealability) of the 3rd seal material can be prevented, and the high sealability as an aerosol container can be maintained for a long period of time. In particular, high sealability can be maintained for a long period of time even for highly permeable stock solutions.

In the aerosol container according to the present invention, when the first seal material, the second seal material, and the third seal material are integrally formed, the process of assembling the seal material can be minimized, which is a production process. The process is not complicated. In addition, when the valve assembly is attached to the container body, the sealing material is not easily displaced.
An aerosol container in which a first seal material, a second seal material, and a third seal material are integrally formed, and the compression degree of the first seal material is higher than the compression degree of the second seal material and the third seal material In this case, penetration of the stock solution can be further prevented by the first seal member, and the durability of the seal structure is high.
In the aerosol container according to the present invention, when the second seal material and the third seal material are integrally formed and are independent of the first seal material, even if the stock solution permeates the first seal material, (2) Since it is not continuous with the seal material and the third seal material, the second seal material and the third seal material are not affected, and high sealability can be maintained for a long time. Further, the material of the first sealing material can be selected according to the contents, and the penetration of the contents can be further prevented.
It is an aerosol container which made the 1st seal material of the present invention independent, and when the 1st seal material is an O-ring, the portion with high degree of compression in the horizontal direction is annularly formed between the inner surface and the inner wall of the opening. It can be formed, and the effect of blocking the penetration of the stock solution is high. Also, high sealability is obtained, and the sealability is not affected by the adhesion strength of the valve assembly. That is, it is not necessary to strongly press the valve assembly against the container body in order to fix the valve assembly to the container body, the second seal member is not compressed more than necessary, and the second seal member is not easily damaged. Furthermore, even if the valve assembly is subjected to an external force or the like, or at the time of assembly, the valve assembly can maintain at least the seal structure of the first seal member even when shifted in the vertical direction.

It is sectional drawing which shows one Embodiment of the aerosol container of this invention. 2a and 2b are cross-sectional views of the mounting cap and the sealing material of the aerosol container of FIG. 1, respectively, and FIG. 2c is an enlarged cross-sectional view of the main part. FIG. 3a is a cross-sectional view showing another embodiment of the aerosol container of the present invention, and FIGS. 3b, c and d are respectively an enlarged cross-sectional view of an essential part of the aerosol container of FIG. FIG. FIG. 4a is an enlarged sectional view of an essential part showing still another embodiment of the aerosol container of the present invention, and FIG. 4b is a sectional view of a sealing material. Fig. 5a is an enlarged sectional view of a main part showing still another embodiment of the aerosol container of the present invention, Fig. 5b is an enlarged sectional view of the main part of the aerosol container of Fig. 5a, and Fig. 5c is an aerosol container of the present invention It is a principal part expanded sectional view of other embodiment.

The aerosol container 10 of FIG. 1 comprises a container body 11, a valve assembly 12 attached to the opening thereof, and a seal member 13 provided between the container body 11 and the valve assembly 12. The seal member 13 is provided so as to cover the annular flange portion 15 of the container main body 11, and forms a three-point seal structure between the valve assembly 12 and the annular flange portion 15 of the container main body 11. Provided in
By filling the aerosol container 10 with the undiluted solution A of the aerosol composition and the propellant P, an aerosol product is obtained.

The container main body 11 is a container made of synthetic resin provided with a bottom 11a, a cylindrical trunk 11b, a tapered shoulder 11c, and a cylindrical neck 11d. Thus, since it is made of synthetic resin, the corrosion resistance to the contents is high.
An annular flange portion (valve engaging portion) 15 which protrudes outward is formed on the upper end outer peripheral surface of the neck portion 11 d.
The container body 11 is formed by injection molding of a bottomed cylindrical parison made of a synthetic resin such as polyethylene terephthalate, nylon, polypropylene, etc., and blowing air inside while expanding the parison in the axial direction, and molded by biaxial stretch blow molding It is done.
The container body of the aerosol container of the present invention may be provided with an annular flange at the neck (opening), and the other shape is not particularly limited. Further, the volume of the container body is also preferably 30 to 1000 ml, particularly 50 to 500 ml, but it is not particularly limited. Furthermore, the container body is preferably filled with a propellant of an aerosol composition so that the internal pressure at 25 ° C. is 0.1 to 1.0 MPa, and particularly 0.15 to 0.9 MPa.

  The valve assembly 12 fixes the valve housing 16 by fixing the valve housing 17 inserted into the opening of the container body 11, the valve mechanism 17 accommodated in the valve housing 16, and the valve mechanism 17 to the valve housing 16. And a mounting cup 18 for holding the same.

The valve housing 16 is a synthetic resin cylindrical body having a bottom portion 16a. A stepped portion 16 b is formed on the outer peripheral surface so as to decrease in diameter downward. A rubber holding portion 16 c for holding the stem rubber 17 b of the valve mechanism 17 is formed on the upper end inner surface. In the center of the bottom portion 16a, a communication hole 16d is formed, which communicates the inside of the valve housing 16 and the inside of the container body 11. Furthermore, a cylindrical portion 16 e that protrudes downward is formed on the lower surface of the bottom portion 16 a, and the dip tube 19 is mounted.
The valve housing 16 is formed by injection molding of a hard synthetic resin such as polybutylene terephthalate or polyacetal.

  The valve mechanism 17 includes a cylindrical stem 17a made of a synthetic resin and inserted in the valve housing 16 so as to be vertically movable, and a rubber ring-shaped stem provided on the stem 17a and sealing a stem hole communicating with the outside. It consists of a rubber 17b and a spring 17c that biases the stem 17a upward.

The mounting cup 18 is, as shown in FIG. 2a, a cup-shaped housing holding portion 21 opened downward for holding the valve housing 16 and a container fixing portion 22 fixed to the annular flange portion 15 of the neck 11d of the container body 11. And a connecting portion 23 for connecting the housing holding portion 21 and the container fixing portion 22.
The housing holding portion 21 includes a disk-shaped upper bottom portion 21 a covering the upper end of the valve housing 16 and an inner cylindrical portion 21 b extending downward from an edge portion thereof. At the center of the upper bottom portion 21a, a stem insertion hole 21a1 for passing the stem 17a is formed. The inner surface of the upper bottom portion 21 a holds the stem rubber 17 b and is in contact with the upper end of the valve housing 16. At the lower end of the inner cylindrical portion 21b, an annular recess 21b1 recessed inward in the radial direction is formed. The annular recess 21b1 engages with the step 16e of the valve housing 16 (see FIG. 1). That is, the housing holding portion 21 holds and holds the valve housing 16 between the upper bottom portion 21a and the annular recess 21b1 of the inner cylindrical portion 21b.
The container fixing portion 22 includes an inner cylindrical portion (inner wall portion) 22a formed along the inner surface of the neck portion 11d of the container main body 11 and an outer ring portion formed along the upper surface of the neck portion 11d of the container main body 11 It comprises a canopy portion 22 b and an outer cylindrical portion (outer wall portion) 22 c formed along the outer surface of the annular flange portion 15 of the neck portion 11 d of the container main body 11. The lower end of the outer cylindrical portion 22c is crimped so as to engage with the lower surface of the annular flange portion 15 of the container main body 11, and forms an annular locking portion 22d.
The connecting portion 23 is an annular plate that connects the lower end of the inner cylindrical portion 21 b of the housing holding portion 21 and the lower end of the middle cylindrical portion 22 a of the container fixing portion 22.
The mounting cup 18 is formed by plastically deforming a thin metal plate such as aluminum by pressing or the like.

The seal member 13 is, as shown in FIG. 2b, a cylindrical inner seal portion 26, an annular plate-like upper seal portion 27 extending radially outward from the upper end, and a tubular shape extending downward from the outer end It is an integral molded product comprising the outer seal portion 28.
The lower end of the inner seal portion 26 is an inclined surface 26 a so that the outer diameter is reduced downward. By forming the inclined surface 26 a at the lower end of the inner seal portion 26 as described above, the inner surface of the neck portion 11 d of the container main body 11 can be smoothly inserted. The inner seal portion 26 is formed thicker than the upper seal portion 27 and the outer seal portion 28. The upper seal portion 27 and the outer seal portion 28 are formed between the inner surface of the neck portion 11d of the container body and the middle cylindrical portion 22a. It is configured to be compressed more strongly. By thus enhancing the degree of compression, it is possible not only to enhance the sealability but also to suppress the penetration of the contents. Furthermore, the inner seal portion 26 is shorter than the outer seal portion 28.
A seal protrusion 27 a that protrudes downward is formed on the lower surface of the upper seal portion 27, and a partially strongly compressed wire seal portion is formed.
Examples of the material of the seal member 13 include olefin-based elastomers such as polyethylene, and rubbers such as natural rubber and synthetic rubber.

The sealing member 13 is pressed between the container fixing portion 22 of the mounting cup 18 of the valve assembly 12 and the annular flange portion 15 of the neck 11 d of the container body 11 as shown in FIG. 2 c. The seal member 13 is mounted on the container body 11 so that the annular flange portion 15 is covered on the inner side of the seal member 13 in a state where the outer side of the seal member 13 is held inside the container fixing portion 22. .
Specifically, the inner seal portion 26 is compressed between the inner surface of the annular flange portion 15 of the neck portion 11 d of the container body 11 and the outer surface of the middle cylindrical portion (inner wall portion) 22 a of the mounting cup 18. Since the inner seal portion 26 is formed thick, the inner seal portion 26 is strongly compressed in the radial direction to form a seal structure having high sealability and in which contents do not easily penetrate. In addition, by providing an annular rib projecting outward on the middle cylinder portion 22a of the mounting cup 18, a wire seal portion strongly compressed in the radial direction can be formed in the inner seal portion, and the sealability is further enhanced. Become.
The upper seal portion 27 is compressed between the upper surface of the annular flange portion 15 of the neck portion 11 d of the container body 11 and the lower surface of the outer ring portion (the canopy portion) 22 b of the mounting cup 18. Since the seal projection 27a is formed, the seal projection 27a forms a line seal structure with high sealing performance. The upper seal portion 27 is fixed simultaneously with the formation of the locking portion 22 d of the mounting cup 18 while pressing the mounting cup 18 in the direction (downward direction) of the container body 11. Although the seal projection 27a is provided, since the inner seal portion 26 prevents the penetration of the contents, there is no cutting due to the deterioration of the elastic characteristics.
The outer seal portion 28 is compressed between the outer surface of the annular flange portion 15 of the neck portion 11 d of the container body 11 and the inner surface of the outer cylindrical portion (outer wall portion) 22 c of the mounting cup 18. The outer seal portion 28 caulks the lower end of the outer cylindrical portion 22c to form a locking portion 22d, and the mounting cup 18 is fixed to the container main body 11, and at the same time, the outer cylindrical portion 22c is plasticized toward the annular flange portion 15. Compress while deforming. Thus, since the seal structure is formed while being compressed by an external force, the outer seal portion 28 forms a seal structure having high sealability. Furthermore, since the outer seal portion 28 receives an external force through the surface of the outer cylindrical portion 22c, it is hard to break.

  In the method of assembling the aerosol container 10, the stock solution A is filled in the container body 11. Thereafter, the valve assembly 12 in which the sealing material 13 is inserted into the container fixing portion 22 of the mounting cup 18 is held above the container body 11. In that state, the pressurizing agent P is filled from the gap between the container body 11 and the mounting cup 18, and at the same time, the valve assembly 12 is lowered to form the locking portion 22d of the mounting cup 18 while compressing the sealing member 13. . Alternatively, the stock solution A and the pressurizing agent P may be filled from the stem 17 a of the valve mechanism 17 after the aerosol container 10 is assembled first.

  As described above, since the aerosol container 10 has three high sealing structures formed between the container body 11 made of synthetic resin and the valve assembly 12 (between the inside and the outside of the container body 11), the sealing accuracy is high. , Its productivity is excellent. In particular, even if one or two seal structures become sweet due to the assembly of the aerosol container, sufficient sealability is provided. Further, since the inner seal portion 26 prevents the penetration of the contents into the upper seal portion 27 and the outer seal portion 28, even if the undiluted solution has strong permeability, high sealing performance can be maintained for a long time. it can.

  The aerosol container 30 of FIG. 3 a comprises a container body 31, a valve assembly 32 closing its opening, and a sealing member 33 provided between the container body 31 and the valve assembly 32. The seal member 33 is provided so as to cover the flange portion 35 a of the container body 31, and is provided so as to form a three-point seal structure between the valve assembly 32 and the flange portion 35 a of the container body 31. ing.

The container main body 31 is a container made of synthetic resin including a bottom 31a, a cylindrical body 31b, a tapered shoulder 31c, and a cylindrical neck 31d. The bottom 31a is hemispherical. The container body 31 can not stand on its own. Therefore, a bottom cap (imaginary line) is attached to the attachment portion 31e formed at the upper end of the bottom portion 31a or the lower end of the trunk portion 31b. Since the bottom 31a is hemispherical in this manner, the strength against the internal pressure is high. Therefore, the thickness of the container main body 31, in particular, the body 31b can be reduced, and the amount of use of the synthetic resin can be reduced. The thickness of the body 31b is preferably 0.1 to 1.5 mm, more preferably 0.15 to 1.0 mm, and particularly preferably 0.2 to 0.8 mm. The container body is preferably filled with a propellant of an aerosol composition so that the internal pressure is 0.1 to 1.0 MPa, and particularly 0.15 to 0.9 MPa.
The outer peripheral surface of the neck portion 31d is an annular flange 35a that protrudes outward, an upper cylindrical portion 35b formed below the annular flange 35a, and an annular protrusion that is formed radially outward and that is formed below the annular flange 35a. It is comprised from 35c and the lower cylindrical part 35d formed in the downward direction. The lower surface of the annular flange portion 35a is an inclined surface so as to decrease in diameter downward. The inner peripheral surface of the neck portion 31 d is a cylindrical surface. In addition, an annular protrusion 35e protruding upward is formed on the upper surface of the neck portion 31d. The opening diameter of the neck portion 31d is 5 to 30 mm, particularly 7 to 20 mm, and is 1/2 to 1/12, preferably 1/3 to 1/10 of the body.
This container body 31 is also formed by biaxial stretch blow molding in the same manner as the container body 11 of the aerosol container 10 of FIG.

  The valve assembly 32 fixes the valve housing 36 by fixing the valve housing 36 inserted into the opening of the container body 31, the valve mechanism 17 accommodated in the valve housing 36, and the valve mechanism 17 to the valve housing 36. And a mounting cup 38 for holding the same. The valve mechanism 17 is substantially the same as the valve mechanism 17 of the aerosol container 10 of FIG.

  The valve housing 36 is a tube made of synthetic resin and having a bottom portion 36a, as shown in FIG. 3b. The outer peripheral surface is formed with a large diameter upper portion 36b and a small diameter lower portion 36d via the step portion 36c. The outer surface (inner wall portion) of the lower portion 36 d is formed along the inner surface of the neck portion 31 d of the container body 31. A rubber holding portion 36e for holding the stem rubber 17b is formed on the upper end inner surface. A communication hole f connecting the inside of the valve housing and the inside of the container body 31 is formed at the center of the bottom portion 36a, and a cylindrical portion 36g protruding downward for mounting the dip tube 19 is formed on the lower surface of the bottom portion 36a. It is formed.

The mounting cup 38 is continuous with the cup-shaped housing holding portion 21 opened downward for holding the valve housing 36 and the lower end of the housing holding portion 21, and is fixed to the flange portion 35 a of the neck portion 31 d of the container main body 31 And a container fixing portion 42. The housing holding portion 21 is disposed above the container main body 31. Except for the arrangement, the housing holding portion 21 is substantially the same as the housing holding portion 21 of the aerosol container 10 of FIG. The unit 21 b is provided.
The container fixing portion 42 extends outward in the radial direction from the lower end of the inner cylindrical portion 21 and is formed along an upper surface of the neck portion 31 d of the container main body 31. And an outer cylinder portion (outer wall portion) 42 c formed along the outer surface of the annular flange portion 15. The lower end of the outer cylindrical portion 42c is crimped so as to engage with the outer surface of the cylindrical portion 35b of the neck portion from the lower surface or the lower surface of the flange portion 35a of the container body 31 to form an annular locking portion 42d.

  The seal member 33 is, as shown in FIG. 3c, a cylindrical inner seal portion 26, an annular plate-like upper seal portion 27 extending radially outward from the upper end, and a tubular shape extending downward from the outer end It is an integral molded product comprising the outer seal portion 28. The seal material 33 is substantially the same as the seal material 13 of the aerosol container 10 of FIG. 1 except that the inner seal portion 26 is higher than the outer seal portion 28.

The sealing member 33 is placed on the flange portion 35a of the neck 31d of the container body 31 and covered by the container fixing portion 42 of the mounting cup 38 of the valve assembly 32 and the lower portion 36d of the valve housing 36, as shown in FIG. The pressure is held between the flange portion 35a and the container fixing portion 42 and the lower portion 36d.
Specifically, the inner seal portion 26 is compressed between the inner surface of the flange portion 35a of the neck portion 31d of the container body 31 made of synthetic resin and the outer surface of the lower portion 36d of the valve housing 36 made of synthetic resin. Therefore, the elasticity of the synthetic resin of the container body 31 and the valve housing 36 also works, and the sealing performance is further enhanced. Furthermore, since the inner seal portion 26 is formed to be thick and configured to be greatly compressed in the radial direction, high sealing performance can be achieved, and penetration of the contents can be suppressed.
The upper seal portion 27 is compressed between the upper surface of the flange portion 35 a of the neck portion 31 d of the container body 31 and the lower surface of the outer ring portion 42 b of the mounting cup 38. Since the seal projection 27a is formed, a line seal structure having high sealability is formed at the seal projection 27a. Further, a line seal structure having high sealing performance is also formed between the annular projection 35 e of the container body 31 and the lower surface of the upper seal portion 27. That is, two wire seal structures are formed between the upper seal portion 27 and the container body. However, only one of the wire seal structures may be used. The upper seal portion 27 is fixed simultaneously with the formation of the locking portion 42 d of the mounting cup 38 while pressing the mounting cup 38 in the direction (downward direction) of the container body 31. Also in this case, since the penetration of the contents is suppressed by the inner seal portion 26, the elastic property is lowered by the penetration and the part constituting the wire seal structure is not cut.
The outer seal portion 28 is compressed between the outer surface of the flange portion 35 a of the neck portion 31 d of the container body 31 and the inner surface of the outer cylindrical portion 42 c of the mounting cup 38. In addition, in order to fix the mounting cup 38 to the container main body 31, the outer seal part 28 caulks the lower end of the outer cylinder part 42c to form a locking part 42d, and fixes the mounting cup 38 to the container main body 31. The outer cylindrical portion 42c is compressed while being plastically deformed toward the portion 35a. Thus, since the seal structure is formed while being compressed by an external force, the outer seal portion 28 forms a seal structure having high sealability. Furthermore, since the outer seal portion 28 receives an external force through the surface of the outer cylindrical portion 42c, it is hard to break.

  Thus, the aerosol container 30 has three high seal structures between the container body 11 made of synthetic resin and the valve assembly 12 (between the inside of the container body 11 and the outside), as in the aerosol container 10 of FIG. Since it is formed, the sealing accuracy is high, the productivity is excellent, and the high sealing performance can be maintained for a long time. Unlike the aerosol container 10, the aerosol container 30 presses one seal member 33 from three directions with two parts of the valve assembly 32 (the valve housing 36 made of synthetic resin and the mounting cup 38 made of metal) Therefore, the opening of the container body 31 can be made smaller, which is suitable for weight reduction and miniaturization.

  The aerosol container 50 of FIG. 4 uses two seal members. Specifically, it comprises a container body 31, a valve assembly 32 closing the opening, and a first seal member 51 and a second seal member 52 provided between the container body 31 and the valve assembly 32. The container body 31 is substantially the same as the container body 31 of the aerosol container 30 of FIG. The valve assembly 32 is formed with an annular recess 36h for holding the first seal member 51 on the outer periphery of the valve housing 36, but the other configuration is substantially the same as the valve assembly 32 of the aerosol container 30 of FIG. is there. That is, the outer surface of the lower portion 36d of the valve housing 36 is the inner wall portion of the present invention, the outer ring portion 42b of the mounting cup 38 is the canopy portion of the present invention, and the outer cylindrical portion 42c of the mounting cup 38 is the outer wall portion of the present invention. .

The first seal member 51 is an annular ring seal. It is preferred to use an o-ring. The material is suitably selected according to the contents.
The second seal member 52 is, as shown in FIG. 4b, an integrally molded article comprising an annular ring-shaped upper seal portion 57 extending in the horizontal direction and a cylindrical outer seal portion 58 extending downward from the outer end thereof. is there. On the lower surface of the upper seal portion 57, a seal projection 57a which protrudes downward is formed.

The first seal member 51 is compressed between the inner surface of the flange portion 35 a of the neck portion 31 d of the container body 31 made of synthetic resin and the outer surface of the lower portion 36 d of the valve housing 36 made of synthetic resin. Therefore, the elasticity of the synthetic resin of the container body 31 and the valve housing 36 also works, and the sealing performance is further enhanced. Furthermore, when an O-ring is used, since it is compressed radially to form an annular line seal, penetration of the contents can be prevented and the sealability can be further enhanced. Thus, the first seal member 51 can form a seal structure having high sealability and high durability. Further, since the O-ring is compressed with the inner surface of the cylindrical neck portion 31d, stable sealing performance can be obtained regardless of the position of the O-ring, which affects the bonding strength between the mounting cup 38 and the container body 31. I will not. Therefore, it is not necessary to press the mounting cup 38 against the container body 31 more than necessary.
The upper seal portion 57 of the second seal member 52 is a flange portion 35 a of the neck portion 31 d of the container body 31.
And the lower surface of the outer ring portion 42 b of the mounting cup 38. The seal projection 57a forms a line seal structure with high sealability. The upper seal portion 57 is fixed while forming the locking portion 42d of the mounting cup 38 while pressing the mounting cup 38 in the direction of the container body 31 (downward). In addition, the line seal structure by the annular protrusion 35e of the container main body 31 is also provided. However, only one of the wire seal structures may be used. In addition, since penetration of the contents is suppressed by the first seal member 51 and the pressing on the container main body 31 by the mounting cup 38 is not larger than necessary, the wire seal structure is cut off There is no
The outer seal portion 58 of the second seal member 52 is compressed between the outer surface of the flange portion 35 a of the neck portion 31 d of the container main body 31 and the inner surface of the outer cylindrical portion 42 c of the mounting cup 38. Then, the outer seal portion 58 caulks the lower end of the outer cylindrical portion 42c to form the locking portion 42d at the same time as fixing the mounting cup 38 to the container main body 31, and at the same time, plasticizes the outer cylindrical portion 42c toward the flange portion 35a. Compress while deforming. As described above, the outer seal portion 58 forms a seal structure while being compressed by an external force, thereby forming a seal structure having a high sealability. Furthermore, since the outer seal portion 58 receives an external force via the surface of the outer cylindrical portion 42c, it is hard to break.

  As described above, the aerosol container 50 has three high seal structures between the container body 31 made of synthetic resin and the valve assembly 32 (between the inside and the outside of the container body 31) like the aerosol container 10 of FIG. Because it is formed, it has high sealing accuracy and is excellent in its productivity. In addition, since the aerosol container 50 has the inner sealing material independent, even if the contents penetrate the first sealing material 51, there is no influence on the second sealing material 52, and a more stable sealing structure is ensured for a long time can do. In particular, when an O-ring is used as the first seal member 51, the effect is high.

  The aerosol container 60 of FIG. 5 comprises a container body 61, a valve assembly 62 for closing the opening, and a seal member 33 provided between the container body 61 and the valve assembly 62. The seal member 33 is provided so as to cover the upper end of the container body 61, and is provided so as to form a three-point seal structure between the valve assembly 62 and the container body 61. The sealing member 33 is substantially the same as the sealing member 33 of the aerosol container 30 of FIG.

  The container main body 61 is substantially the same as the container main body 11 of the aerosol container 10 of FIG. 1 except that an external thread 61 d 1 is formed on the outer periphery of the neck portion 61 d and a cylindrical portion 61 d 2 is formed above it. is there.

The valve assembly 62 fixes the valve housing 16 by fixing the valve housing 16 inserted into the opening of the container body 61, the valve mechanism 17 accommodated in the valve housing 16, and the valve mechanism 17 to the valve housing 16. And a cover cap 63 for holding. The valve housing 16 and the valve mechanism 17 are substantially the same as the valve housing 16 and the valve mechanism 17 of the aerosol container 10 of FIG.
The cover cap 63 has a cup-shaped housing holding portion 66 opened downward for holding the valve housing 16, a container fixing portion 67 screw-engaged with the neck portion 61 d of the container body 61, a housing holding portion 66 and a container fixing portion 67. And a connecting portion 68 connecting the two.
The housing holding portion 66 includes a disc-like upper bottom portion 66 a covering the upper end of the valve housing 16 and an inner cylindrical portion 66 b extending downward from the edge thereof. At the center of the upper bottom portion 66a, a stem insertion hole 66a1 is formed to pass the stem 17a. The inner surface of the upper bottom portion 66 a presses the stem rubber 17 b and is in contact with the upper end of the valve housing 16. At the lower end of the inner cylindrical portion 66b, an engagement claw 66b1 protruding inward in the radial direction is formed. The engagement claw 66 b 1 engages with the step 16 e of the valve housing 16. That is, the housing holding portion 66 holds and holds the valve housing 16 between the upper bottom portion 66a and the engagement claw 66b1 of the inner cylindrical portion 66b.
The container fixing portion 67 includes an inner cylindrical portion (inner wall portion) 67 a formed along the inner surface of the neck portion 61 d of the container body 61 and an outer ring portion formed to cover the upper end of the neck portion 61 d of the container body 61 ( It comprises a canopy portion) 67 b and an outer cylindrical portion 67 c formed along the outer surface of the neck portion 61 d of the container body 61. The upper end inner surface of the outer cylindrical portion 67c is formed with a stepped portion (outer wall portion) 67c1 whose diameter decreases upward. And below the step portion 67c, a female screw (helical protrusion) 67c2 which engages with the male screw 61d1 of the neck portion 61d is formed.

The seal member 33 is placed on the upper end of the neck 61 d of the container body 61 and covered by the container fixing portion 67 of the cover cap 63 of the valve assembly 62 as shown in FIG. It is pinched between. The seal member 33 receives the inclined surface 61 d 3 of the container main body 61 in a state where the seal member 33 is mounted on and integrated with the container fixing portion 67 of the cover cap 63.
Specifically, the inner seal portion 26 is compressed between the inner surface of the inner cylindrical portion 61 d 2 of the neck portion 61 d of the container main body 61 made of synthetic resin and the outer surface of the middle cylindrical portion (inner wall portion) 67 a of the cover cap 63. Therefore, the elasticity of the synthetic resin of the container body 61 and the cover cap 63 also works, and the sealing performance is further enhanced. Furthermore, since the inner seal portion 26 is formed thick, the sealability is further enhanced, and the penetration of the contents can be prevented. Thus, the inner seal portion 26 forms a highly durable and sealable seal structure.
The upper seal portion 27 is compressed between the upper surface of the upper end of the neck portion 61 d of the container main body 61 and the lower surface of the outer ring portion (the canopy portion) 67 b of the cover cap 63. Although not shown in FIGS. 5a and 5b, since the seal projection 27a is formed as shown in FIG. 3c, a line seal structure having high sealability is formed. The upper seal portion 27 is compressed by screw fitting of the container body 61 and the cover cap 63.
The outer seal portion 28 is compressed between the outer surface of the upper end of the neck portion 61 d of the container body 61 and the stepped portion (outer wall portion) 67 c 1 of the container fixing portion 67 of the cover cap 63. The outer seal portion 28 is also compressed by screw fitting of the container body 61 and the cover cap 63.

The aerosol container 60 has a lower sealing force because the outer seal portion 28 does not compress due to an external force as compared with the aerosol container of FIGS. However, as with the aerosol container 10 of FIG. 1, since three high seal structures are formed between the container body 11 made of synthetic resin and the valve assembly 12 (between the inside of the container body 11 and the outside), The sealing accuracy is high, and the productivity is excellent.
As shown in FIG. 5c, the step 67c1 may be inclined such that the diameter thereof is slightly reduced upward. As a result, the container main body 61 and the cover cap 63 are screwed and the cover cap 63 is strongly tightened, whereby the degree of radial compression on the seal member 33 can be increased, and the outer seal portion (third seal member) 28 The sealability of the container can be as high as the aerosol container of FIG.

DESCRIPTION OF SYMBOLS 10 aerosol container 11 container main body 11a bottom part 11b body part 11c shoulder part 11d neck part 12 valve assembly 13 seal member 15 annular flange part 16 valve housing 16a bottom part 16b stepped part 16c rubber holding part 16d communicating hole 16d tubed part 17 valve mechanism 17a stem 17b Stem rubber 17c Spring 18 Mounting cup 19 Dip tube 21 Housing holding part 21a Upper bottom part 21a1 Stem insertion hole 21b Inner cylinder part 21b1 Annular recess 22 Container fixed part 22a Middle cylinder part 22b Outer ring part 22c Outer cylinder part 22c Locking part 23 Connection Part 26 Inner seal part 26a Inclined surface 27 Top seal part 27a Seal projection 28 Outer seal part 30 Aerosol container 31 Container body 31a Bottom part 31b Body part 31c Shoulder part 31d Neck part 31e Mounting part 3 2 valve assembly 33 seal member 35a flange portion 35b upper cylindrical portion 35c protrusion 35d lower cylindrical portion 35e annular projection 36 valve housing 36a bottom portion 36b upper portion 36c lower portion 36d lower portion 36e rubber holding portion 36f communicating hole 36g tube portion 36h annular recess 38 mounting Cup 42 container fixing portion 42b outer ring portion 42c outer cylinder portion 42d locking portion 50 aerosol container 51 first seal member 52 second seal member 57 upper seal portion 57a seal projection 58 outer seal portion 60 aerosol container 61 container body 61d neck portion 61d1 Male thread 61d2 Cylindrical part 61d3 Inclined surface 62 Valve assembly 63 Cover cap 66 Housing holding part 66a Upper bottom 66a1 Stem insertion hole 66b Inner cylindrical part 66b1 engaging claw 67 Container fixed part 67a Middle cylindrical part (Inner wall)
67b Outer ring (canopy)
67c Outer cylinder 67c1 step (outer wall)
67c2 female thread 68 connection part

Claims (6)

Container body made of synthetic resin,
An aerosol container comprising a valve assembly attached to the opening, the aerosol container comprising:
The valve assembly includes a cylindrical inner wall inserted into the opening, an annular canopy covered on the upper end of the opening, and a cylindrical outer wall covering the outer periphery of the opening. ,
A first sealing material for sealing between the inner surface and the inner wall of the opening, a second sealing material for sealing between the flat top surface of the opening and the canopy, and the outer surface of the opening And a third sealing material for sealing between the housing and the outer wall,
The first seal material and the third seal material are horizontally compressed, and the second seal material is vertically compressed.
The first seal material, the second seal material, and the third seal material comprising an olefin-based elastomer or rubber,
Aerosol container. The first sealing material, the second sealing material, and the third sealing material are integrally formed, and in the non-compression state, the first sealing material and the third sealing material are downwardly from the second sealing material. Extending towards
An aerosol container according to claim 1. The degree of compression of the first seal material is higher than the degree of compression of the second seal material and the third seal material,
An aerosol container according to claim 2. The second seal material and the third seal material are integrally formed, and in the non-compression state, the third seal material extends downward from the second seal material, and the second seal material and the third seal are formed. Material is independent of the first seal material,
An aerosol container according to claim 1. The first seal material is an O-ring,
The aerosol container of Claim 4. An annular projection is provided on the upper surface of the opening,
The aerosol container in any one of Claims 1-5.