JP2016088606A - Aerosol container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol container which achieves stable airtightness even when a synthetic resin made container body is used.SOLUTION: An aerosol container 1 includes: a synthetic resin made container body 10 including an opening part; and a valve assembly 20 which closes the opening part of the container body 10, allows an interior of the container body 10 to communicate with the exterior, and blocks communication between the interior of the container body 10 and the exterior. The valve assembly 20 includes a housing 30 which is inserted into the opening part. A seal material 60, which is compressed in a radial direction, is provided between an inner surface of the opening part and an outer surface of the housing 30. The container body 10 and the housing 30 are fixed by engagement in the container body 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an aerosol container. In particular, the present invention relates to an aerosol container that uses a lot of synthetic resin materials.

  In the case of an aerosol container, a strong seal capable of resisting internal pressure is required. Therefore, conventionally, when sealing the opening of the container body, caulking with a metal mounting cup (fitting member) has been performed (see, for example, Patent Documents 1 and 2). The aerosol container must also have good airtightness. Therefore, in Patent Document 1, a sealing material is provided between the opening top surface and the mounting cup, and the mounting cup is squeezed into the container body to compress the sealing material in the vertical direction, and the opening top surface and the mounting cup. Adopts a seal structure that adheres closely.

JP-A-7-309382 WO2012 / 086818

However, since the pressure from the inside is always applied to the mounting cup, if the caulking is weak, the mounting cup loses the pressure and floats with time, and the compression of the sealing material becomes weak and causes leakage. In particular, when a synthetic resin container body is used, such a problem is likely to occur.
In addition, since the mounting cup is engaged with the flange portion of the opening of the container body by crimping the lower end of the mounting cup, when the mounting cup is lifted, the reduced diameter portion of the mounting cup becomes the flange portion. As a result of getting on and deforming the opening inward in the radial direction, there arises a problem that the seal cannot be maintained.

  In addition, as disclosed in Patent Document 2, an annular gasket (O-ring) is provided on the outer peripheral surface of the valve holder, and the valve holder is inserted into the container body, so that the flange portion and the neck portion of the container body are cylindrical. By adopting a seal structure in which the gasket is compressed in the radial direction between the inner surface of the valve and the outer peripheral surface of the valve holder, the contents will not leak even if the valve assembly loses pressure and moves up and down somewhat. However, in any case, since the valve assembly must be firmly crimped to the container body, a large load is applied to the opening of the container body, and the seal tends to become unstable.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide an aerosol container that can exhibit stable airtightness even when a synthetic resin container body is used. .

In order to solve the above problems, an aerosol container of the present application includes a synthetic resin container body having an opening, a valve assembly that closes the opening of the container body and communicates / blocks the inside and outside of the container body. The valve assembly includes a housing that is inserted into the opening, and a radially compressed seal material is provided between the inner surface of the opening and the outer surface of the housing. The container body and the housing are fixed by engagement in the container body.

  The engagement between the container body and the housing is preferably a friction fit. Further, in this case, the container is a friction fit between the inner surface of the container body and the outer surface of the housing by press-fitting the housing into the opening, or the cap by press-fitting a cap that is fitted and fixed to the housing into the opening. The inner surface of the container main body and the outer surface of the housing formed by friction fitting between the inner surface of the main body and the outer surface of the valve cap, or by reducing the diameter of the container main body by fitting the fitting member to the container main body. The diameter of the container body is reduced by screwing the container body screw and the screw of the fitting member, or by reducing the diameter of the metal fitting member by an external force. It is preferable.

  Alternatively, the engagement between the container main body and the housing is the engagement between the enlarged diameter portion of the inner surface of the container main body and the engaging claw on the outer surface of the housing, or between the screw on the inner surface of the container main body and the screw on the outer surface of the housing. Screwing may be used.

In the aerosol container according to the present invention, the sealing is performed between the inner surface of the opening and the outer surface of the housing. That is, since the sealing structure does not depend on vertical compression by caulking, the container body made of synthetic resin. Even airtightness can be maintained. In addition, since the fixing between the housing and the container body does not depend only on the caulking, the caulking load on the container body can be suppressed, and the seal can be stabilized. Further, the housing and the container main body are fixed by engagement in the container main body, in other words, the engaging portion (the portion where the container main body and the housing are attached) is not exposed to the outside. Even when shocked from the outside, it is difficult to come off. Further, since the deformation of the opening portion in the radial direction cannot occur or hardly occurs due to the lifting of the fitting member, the airtightness can be maintained even if the aerosol container is stored at a high temperature, for example. .
Further, such a sealing structure can be easily applied to a container body having a small opening diameter, which is difficult to be caulked.

  Further, if the engagement between the container body and the housing is a friction fit by press-fitting, the engagement operation itself is extremely simple, and sufficient engagement force and airtightness can be ensured.

  Also, when the engagement between the container body and the housing is a frictional engagement by reducing the diameter of the container body by screwing the fitting member, the engagement operation is extremely simple and sufficient engagement force is obtained. And airtightness can be secured.

  Even when the engagement between the container main body and the housing is a frictional engagement by reducing the diameter of the fitting member by an external force, the engagement operation is extremely simple and sufficient engagement force and airtightness can be obtained. Can be secured.

  Also, the engagement between the container body and the housing can be achieved by engaging the enlarged diameter portion of the inner surface of the container body with the engagement claws on the outer surface of the housing. Airtightness can be ensured.

  Even when the engagement between the container main body and the housing is a screw engagement between the screw on the inner surface of the container main body and the screw on the outer surface of the housing, the engagement operation is extremely simple and sufficient engagement force is obtained. And airtightness can be secured.

1a is a cross-sectional view of an aerosol container according to a first embodiment of the present invention, and FIG. 1b is an enlarged view of the vicinity of a valve assembly. It is sectional drawing to which the valve assembly vicinity of the aerosol container which concerns on 2nd Embodiment of this invention was expanded. It is sectional drawing to which the valve assembly vicinity of the aerosol container which concerns on 3rd Embodiment of this invention was expanded. FIG. 4a is a sectional view of an aerosol container according to a fourth embodiment of the present invention, and FIG. 4b is an enlarged view of the vicinity of the valve assembly. FIG. 5a is a sectional view of an aerosol container according to a fifth embodiment of the present invention, and FIG. 5b is an enlarged view of the vicinity of a valve assembly. It is sectional drawing to which the valve assembly vicinity of the aerosol container which concerns on 6th Embodiment of this invention was expanded.

  Next, a first embodiment of an aerosol container of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the aerosol container 1 of the present invention includes a container body 10 having an opening at the upper end and a valve assembly 20 that closes the opening. Hereinafter, each component will be described in detail.

  As shown in FIG. 1a, the container body 10 includes a hemispherical bottom portion 10a, a cylindrical trunk portion 10b, a tapered shoulder portion 10c, a cylindrical neck portion 10d, and a thick flange portion formed at the upper end of the neck portion 10d. 10e is a synthetic resin container. Further, a flange-shaped holding portion 10f protruding outward in the radial direction is formed below the flange portion 10e. This holding part 10f is for suspending and supporting the container body 10 that cannot be self-supported by the hemispherical bottom part 10a when assembling the aerosol container or filling the contents. At the time of use, a saddle (imaginary line) is attached to the attachment part 10g at the lower end of the body part 10b so that it can stand on its own. The hemispherical shape of the bottom 10a is a measure for ensuring pressure resistance while suppressing the thickness of the container body 10. Moreover, as the container main body 10, the thing which produces intensity | strength by tension | tensile_strength by having applied internal pressure may be sufficient. The trunk | drum 10b is cylindrical. The wall thickness is 0.08 to 0.8 mm, preferably 0.1 to 0.5 mm. And the internal diameter is 30-80 mm, Preferably it is 40-70 mm. Moreover, the thickness of the bottom part 10a is 1-4 mm, Preferably it is 1.5-3 mm, 4-12 times of the trunk | drum 10b, Preferably it is 5-10 times. The internal pressure is, for example, 0.1 to 1.0 MPa.

  As shown in FIG. 1b, the inner surface of the opening has a large diameter on the upper side (flange portion 10e side) and a smaller diameter on the lower side (shoulder portion 10c side). A step portion 10j is formed between 10h and the small diameter portion 10i. The inner diameter of the opening is 5 to 30 mm, preferably 7 to 20 mm in the large diameter portion 10h, and 1 to 20 mm, preferably 3 to 10 mm in the small diameter portion 10i. The large diameter portion 10h is ½ or less, preferably 以下 or less of the inner diameter of the body portion 10b. The inner diameter of the small diameter portion 10i is preferably 1/1 to 1/10 with respect to the inner diameter of the large diameter portion 10h. Thus, if the inner diameter of the opening is reduced, the pressure applied to the housing 30 to be described later is reduced, so that the valve assembly 20 is difficult to come off without being tightly crimped. The full filling amount of the container is 30 to 1000 ml, preferably 50 to 500 ml.

  As a manufacturing method of the container body 10, for example, a preform is formed by injection molding from a synthetic resin such as polyethylene terephthalate (PET), and the body portion 10b is expanded by biaxial stretch blow molding or the like.

The valve assembly 20 includes a housing 30 inserted into the opening of the container body 10, a valve mechanism 40 held by the housing 30, and the valve mechanism 40 in the housing 3.
And a cover (fitting member) 50 fixed to zero. The valve assembly 20 does not use a metal material, is lightweight and inexpensive, and is ecological because it does not need to be separated at the time of disposal.

  As shown in FIG. 1B, the housing 30 is a synthetic resin cylindrical body having a bottom 30a. A notch 30b is formed at the upper end, and a stem rubber 42 of the valve mechanism 40 described later is disposed. An annular flange portion 30c protruding outward in the radial direction is formed on the upper side surface. The lower surface of the annular flange portion 30 c is in contact with the upper end surface of the container body 10. An annular recess 30d that is recessed inward in the radial direction is formed on the side surface above the flange portion 30c. A protrusion 50d of a cover 50 described later is fitted into the annular recess 30d. An annular recess 30e that is recessed inward in the radial direction is also formed on the side surface below the flange portion 30c. An O-ring (seal material) 60 is attached to the annular recess 30e. The O-ring 60 is compressed in the horizontal direction (radial direction) between the inner surface of the annular recess 30e and the inner surface of the large-diameter portion 10h of the opening of the container body 10, and seals between the container body 10 and the housing 30. .

  A communication hole 30f penetrating vertically is formed at the center of the bottom 30a of the housing 30. A plurality of projecting pieces 30g projecting upward are formed in an annular shape on the upper surface of the bottom 30a. The protruding piece 30g is configured such that the center portion in the vertical direction bends radially outward. A cylindrical portion 30h protruding downward is formed on the lower surface of the bottom portion 30a, and a dip tube 70 is attached to the lower end thereof. The cylindrical portion 30h has a slightly larger diameter than the small diameter portion 10i of the opening. When the housing 30 is inserted into the opening of the container body 10, the cylindrical portion 30 h is press-fitted into the small diameter portion 10 i, so that the outer surface of the cylindrical portion 30 h of the housing 30 and the inner surface of the small diameter portion 10 i of the opening of the container main body 10. Are friction fitted (tight fit). In addition, the cylinder part 30h may be cylindrical, and a notch or a slit may be formed in a part thereof. Inserting a notch or slit facilitates insertion into the small diameter portion 10i, and further reduces the amount of material used, leading to cost reduction.

  The valve mechanism 40 includes a cylindrical stem 41 made of synthetic resin that is inserted into the housing 30 so as to be movable up and down, a rubber ring-shaped stem rubber 42 that receives the stem 41, and the protruding piece 30g. . The stem 41 is held in a state where the protruding piece 30g of the housing 30 is bent outward. Note that the stem 41 and the stem rubber 42 are general ones used in aerosol valves, and normally, the stem hole 41a of the stem 41 is closed by the stem rubber 42, and the inside of the container body 10 is blocked from the outside. In use, the stem rubber 42 that has closed the stem hole 41a is displaced by pushing the stem 41 downward against the urging force of the protruding piece 30g via a push button (not shown), and the container body 10 communicates with the outside, and the contents are ejected from the ejection holes 41b.

The cover 50 is a synthetic resin cylindrical body that covers the housing 30 and the valve mechanism 40, covers the flange portion 10e of the container body 10, and has an upper base 50a. A stem insertion hole 50b through which the stem 41 is passed is formed in the upper bottom 50a. Further, the lower portion of the cover 50 is expanded in accordance with the outer diameter of the flange portion 10e of the opening. As described above, the protruding portion 50d that is fitted into the annular recess 30d of the housing 30 is formed at the inner angle of the step portion 50c generated by the diameter expansion, and the valve mechanism 40 is inserted into the housing 30 by the fitting of the protruding portion 50d. Is held in. Furthermore, a locking portion 50e that protrudes radially inward is formed at the lower end of the cover 50. The locking portion 50e is locked to the lower surface of the flange portion 10e of the container body 10 to prevent the valve assembly 20 from jumping off due to an increase in internal pressure due to environmental changes (temperature increase) or deformation of the container body. Yes. Since the outer surface of the cylindrical portion 30h of the housing 30 and the inner surface of the small-diameter portion 10i of the opening of the container body 10 are friction-fitted, the thickness and material strength of the cover 50 are suppressed compared to the conventional one. Can be reduced in weight and cost. In addition, a cutout or a slit may be provided on the side surface of the cover 50 so that the locking operation to the flange portion 10e of the container body 10 can be performed easily. In this case, the amount of material used is further reduced, leading to cost reduction.

  The aerosol container 1 having the above configuration is filled in the following steps. First, the container body 10 is filled with the stock solution. Next, the valve assembly 20 is assembled to the container body 10. Thereafter, filling is performed by filling the pressurizing agent while opening the stem 41 of the valve mechanism 40. However, the pressure agent may be filled from the gap between the valve assembly 20 and the opening immediately before the valve assembly 20 is assembled to the container body 10. Furthermore, after assembling the aerosol container 1, the stock solution and the pressurizing agent may be filled from the stem 41.

  The aerosol container 1 having the above-described configuration is sealed between the inner surface of the large-diameter portion 10h of the opening and the outer surface of the housing 30, and between the outer surface of the cylindrical portion 30h of the housing 30 and the opening of the container body 10. Since the inner surface of the small-diameter portion 10i is frictionally fitted, a predetermined engagement force and airtightness can be ensured even with the synthetic resin container body 10. Further, since the caulking process is not required, the engaging work can be performed very easily. In addition, if the inner diameter of the opening is large, the O-ring 60 is easily twisted when the housing 30 is inserted into the opening, and it is necessary to work carefully, and the work is complicated and time consuming. Since the inner diameter of the portion is relatively small, such a problem does not occur. Further, since sealing is performed at the large-diameter portion 10h of the opening and engagement is performed at the small-diameter portion 10i, damage to the seal can be suppressed as compared with the case where sealing and engagement are performed at the same location. In addition, as shown in FIG. 1, since the thickness of the small diameter portion 10i is increased and the holding portion 10f is formed on the outer periphery thereof, the diameter expansion of the opening is suppressed, and the friction fitting is performed for a long time. It is maintained stably for a long time.

  Next, 2nd Embodiment of the aerosol container of this invention is described in detail based on drawing. As shown in FIG. 2, the aerosol container 2 of the second embodiment includes a container body 10 and a valve assembly 200, which is basically the same as that of the first embodiment, A cylindrical portion 300h that protrudes downward from the bottom surface of the bottom portion 300a is formed, and an engaging claw 300i that protrudes radially outward is formed at the lower end of the cylindrical portion 300h. When the housing 300 is inserted into the opening of the container body 10, the engagement claw 300 i is locked to the inner surface (the expanded diameter part 100 n) which is the lower end of the neck 10 d of the container body 10 and expands toward the shoulder 10 c. It is supposed to be. Note that the lower end side of the cylindrical portion 300 h is thinner than the upper portion, and a gap is formed between the cylindrical portion 300 h and the dip tube 70. Therefore, the operation of inserting the engaging claw 300i into the small diameter portion 10i can be easily performed.

  Thus, in 2nd Embodiment, since the housing 300 and the container main body 10 are latched by the engagement nail | claw 300i, the engagement operation | work is very easy. Moreover, since caulking is not required as in the first embodiment, it can be easily applied to a container body having a small opening diameter.

  In this embodiment, the metal spring 43 is used to urge the stem 41 upward, but the configuration is the same as that of the first embodiment in other respects. Since the operational effects are also the same, the same reference numerals are given and description thereof is omitted.

Next, a third embodiment of the aerosol container of the present invention will be described in detail with reference to the drawings. In the aerosol container 3 of the third embodiment, as shown in FIG. 3, a female screw 101k is formed on the inner surface of the small diameter portion 10i of the container main body 101, and a male screw 301j corresponding to the female screw 101k is connected to the housing 301. It is characterized in that it is formed on the outer surface of the cylindrical portion 301h. When the housing 301 is inserted into the opening of the container body 101, the housing 301 and the container body 101 are engaged by screwing screws together. Note that the male screw 301j of the housing 301 and the female screw 101k of the container body 101 may be formed by replacing male and female.

  In the present embodiment, the valve assembly 201 includes a valve cap 801 for integrating the housing 301 and the valve mechanism 40. The valve cap 801 is a metallic cylindrical body having an upper bottom 801 a that covers the upper portion of the housing 301, and a stem insertion hole 801 b through which the stem 41 is passed is formed in the upper bottom 801 a. The lower end of the valve cap 801 is deformed (reduced in diameter) inward in the radial direction, and the reduced diameter portion 801c is fitted into the annular recess 30d of the housing 301 so that the valve mechanism 40 and the housing 301 are integrated. Yes. In the first and second embodiments, the valve mechanism 40 is fixed to the housing 30 by the cover 50. As described above, if the valve mechanism 40 and the housing 301 are integrated by the valve cap 801, the housing 301 The screwing operation with the container body 101 can be performed easily.

  Thus, in 3rd Embodiment, since the housing 301 and the container main body 101 are engaged by screwing, engagement operation is very easy. Moreover, since the caulking process is not required when engaging the housing 301 with the container main body 101 as in the above embodiment, the present invention can be easily applied to a container main body having a small opening diameter.

  In addition, in this embodiment, the shape of the cover 501 is different from the above embodiment. Specifically, it differs from the above embodiment in that the upper bottom 501a of the cover 501 covers the flange portion 30c of the housing 301 and a valve cap insertion hole 501b through which the valve cap 801 is passed is formed in the upper bottom 501a. Yes. However, since it has the structure similar to 1st, 2nd embodiment about the other point and the effect is also the same, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  Next, a fourth embodiment of the aerosol container of the present invention will be described in detail with reference to the drawings. As shown in FIG. 4, the aerosol container 4 of the fourth embodiment also includes a container body 102 having an opening at the upper end and a valve assembly 202 that closes the opening. Hereinafter, each component will be described in detail. The feature of the present embodiment is that a screw cap 502 and a film material 902 are mainly used. Accordingly, only the characteristic part will be mainly described, and the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 4a, the container main body 102 is basically the same as that of the above embodiment, but on the outer surface above the holding portion 10f, there is a male screw corresponding to the female screw 502f of the screw cap 502 (fitting member). The difference is that a screw 102m is formed. Further, the inner and outer diameters of the neck portion 102d are uniform.

  The valve assembly 202 covers the housing 302 that is inserted into the opening of the container body 102, the valve mechanism 40 that is held by the housing 302, the screw cap 502 that fixes the housing 302 to the container body 102, and the screw cap 502. A film material 902.

As shown in FIG. 4b, the housing 302 is a cylindrical body made of synthetic resin having a bottom portion 302a. A notch 302b is formed at the upper end, and the stem rubber 42 of the valve mechanism 40 is disposed. Further, an annular flange portion 302c protruding outward in the radial direction is formed at the upper end. The lower surface of the annular flange portion 302 c is in contact with the upper end surface of the container main body 102. An annular recess 302e that is recessed inward in the radial direction is formed on a side surface below the flange portion 302c. An O-ring (seal material) 60 is attached to the annular recess 302e. The O-ring 60 is compressed in the horizontal direction (radial direction) between the inner surface of the annular recess 302e and the inner surface of the opening of the container body 102, and seals between the container body 102 and the housing 302. In the center of the bottom portion 302a of the housing 302, a communication hole 302f penetrating vertically is formed. A cylindrical portion 302h protruding downward is formed on the lower surface of the bottom portion 302a, and a dip tube 70 is attached.

  The screw cap 502 is a cylindrical body made of a synthetic resin having an upper bottom 502 a that covers the vicinity of the opening of the container body 102 in addition to the valve mechanism 40 and the housing 302. A stem insertion hole 502b through which the stem 41 is passed is formed in the upper bottom 502a. On the inner surface of the screw cap 502, a female screw 502f corresponding to the male screw 102m formed on the neck 102d of the container body 102 is formed. Further, the inner surface of the screw cap 502 is reduced in diameter toward the upper bottom 502a. In other words, the height of the thread of the female screw 502f is increased as it goes toward the upper bottom 502a. Then, the screw cap 502 is externally fitted and screwed into the opening of the container main body 102, thereby deforming (reducing the diameter) the opening inward in the radial direction, and friction fitting between the inner surface of the opening and the outer surface of the housing 302. I am letting. In this embodiment, the screw cap 502 prevents the valve assembly from jumping off due to an increase in internal pressure due to an environmental change (temperature increase) or deformation of the container body. Further, if the male screw 102m or the female screw 502f is a taper screw, the opening of the container main body 102 can be deformed radially inward by screwing or internal pressure. However, it may be a straight screw. The material of the screw cap 502 may be rubber or metal in addition to synthetic resin.

  The film material 902 is a shrink film that shrinks when heated, and suppresses deformation of the screw cap 502 outward in the radial direction. The shape is a cylindrical body having an upper base 902 a that covers the screw cap 502. A stem insertion hole 902b through which the stem 41 is passed is formed in the upper bottom 902a. The lower end is in contact with the outer surface of the opening of the container body 102. As the film material 902, a cap made of rubber, synthetic resin, or metal can be used in addition to the shrink film.

  In the aerosol container 4 having the above-described configuration, sealing is performed between the inner surface of the opening and the outer surface of the housing 302, and the diameter of the opening of the container main body 102 is reduced by the screw cap 502. Therefore, a predetermined engagement force and airtightness can be ensured even with the container body 102 made of synthetic resin. Further, since the caulking process is not required, the engaging operation is very simple, and it can be easily applied to a container body having a small opening diameter. Note that the filling process, the valve mechanism 40, and the like are the same as those in the above-described embodiment, and have the same effects. Further, the male screw 102m of the container body 102 and the female screw 502f of the screw cap 502 may be formed by exchanging male and female.

  Next, a fifth embodiment of the aerosol container of the present invention will be described in detail with reference to the drawings. As shown in FIG. 5, the aerosol container 5 of the fifth embodiment also includes a container body 103 having an opening at the upper end and a valve assembly 203 that closes the opening. Hereinafter, each component will be described in detail. The feature of the present embodiment is that the housing 303 and the container main body 103 are engaged mainly using the valve cap 803. Accordingly, only the characteristic part will be mainly described, and the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 5a, the container body 103 is the same as the above-described embodiment except that the bottom 103a is formed in an arc shape that protrudes inward and a holding portion for supporting suspension is not formed. Note that the shape of the bottom 103a is a measure for ensuring pressure resistance while suppressing the thickness of the container body 103 while allowing the container itself to be self-supporting. The relationship between the inner and outer diameters of the opening and the body 103b, the full injection amount, and the like are the same as in the above embodiment.

  The valve assembly 203 includes a housing 303 inserted into the opening of the container body 103, a valve mechanism 40 held by the housing 303, a valve cap 803 for fixing the valve mechanism 40 to the housing 303, and the housing 303 as a container. And a cover (fitting member) 503 that is fixed to the main body 103.

  As shown in FIG. 5b, the housing 303 is a synthetic resin cylindrical body having a bottom portion 303a. A notch 303b is formed at the upper end, and a stem rubber 42 of the valve mechanism 40 is disposed. Further, an annular flange portion 303c protruding outward in the radial direction is formed on the side surface from the upper end to the vicinity of the center portion. The lower surface of the annular flange portion 303c is in contact with the upper surface of the step portion 10j between the large diameter portion 10h and the small diameter portion 10i of the container body 103. A protruding portion 303k that protrudes further outward in the radial direction is formed at the upper end of the flange portion 303c. A reduced diameter portion 803c of a valve cap 803, which will be described later, is engaged with the protruding portion 303k. An annular recess 303e that is recessed inward in the radial direction is formed on a side surface below the flange portion 303c. An O-ring (seal material) 60 is attached to the annular recess 303e. The O-ring 60 is compressed in the horizontal direction (radial direction) between the inner surface of the annular recess 303e and the inner surface of the small-diameter portion 10i of the opening of the container body 103, and seals between the container body 103 and the housing 303. In the center of the bottom portion 303a of the housing 303, a communication hole 303f penetrating vertically is formed. A cylindrical portion 303h protruding downward is formed on the lower surface of the bottom portion 303a, and a dip tube 70 is attached.

  The valve cap 803 is a metallic cylindrical body that covers the valve mechanism 40 and has an upper base 803 a that covers the upper and side surfaces of the housing 303. A stem insertion hole 803b through which the stem 41 is passed is formed in the upper bottom 803a. Further, a part of the side surface of the valve cap 803 is deformed (reduced in diameter) inward in the radial direction, and the reduced diameter portion 803c is engaged with the protruding portion 303k of the housing 303, whereby the valve mechanism 403 and the housing are arranged. 303 is integrated. In other words, the valve cap 803 is fitted and fixed to the upper portion of the housing 303. Therefore, although the valve cap 803 and the housing 303 are separate bodies, they function as an integral part after assembly. The outer diameter of the valve cap 803 is slightly larger than the inner diameter of the large diameter portion 10 h of the opening of the container main body 103. When the housing 303 is inserted into the opening of the container body 103, the valve cap 803 is press-fitted into the opening so that the inner surface of the large-diameter portion 10h of the opening of the container body 103 and the valve cap 803 and the outer surface are rubbed. It is mated.

  The cover 503 is a cylindrical body made of a synthetic resin that has an upper bottom 503 a that covers the housing 303 and the valve mechanism 40 via the valve cap 803 and covers the flange portion 10 e of the container body 103. A stem insertion hole 503b through which the stem 41 is passed is formed in the upper bottom 503a. At the lower end of the cover 503, a locking portion 503e that protrudes inward in the radial direction is formed. The locking portion 503e locks with the lower surface of the flange portion 103e of the container main body 103, thereby preventing an increase in internal pressure due to environmental changes (temperature increase) and skipping of the valve assembly due to deformation of the container main body. . Since the inner surface of the large-diameter portion 10h of the opening of the container main body 103 and the outer surface of the valve cap 803 are frictionally fitted by press-fitting the valve cap 803 into the opening, the thickness of the cover 503 The material strength can be suppressed as compared with the conventional one, and the weight can be reduced and the cost can be reduced.

The aerosol container 5 having the above-described configuration is filled in the following steps. First, the container body 103 is filled with the stock solution. Next, the valve assembly 203 excluding the cover 503 is held above the container body 103 at such a height that the O-ring 60 does not cover the inner surface of the opening. Then, the pressurizing agent is filled from the gap between the container main body 103 and the valve assembly 203, and at the same time, the valve assembly 203 excluding the cover is lowered. In this embodiment, since the valve mechanism 40 is fixed to the housing 303 regardless of the cover 503, the container body 1
By simply inserting the housing 303 into 03, the container body 103 and the housing 303 are sealed and fixed (engaged), and the pressurizing agent filling (undercup filling) before assembly is easy.

  The aerosol container 5 configured as described above performs sealing between the inner surface of the small-diameter portion 10i of the opening and the outer surface of the housing 30, and indirectly connects the housing 303 and the container body 103 via the valve cap 803. Since they are engaged, a predetermined engaging force and airtightness can be secured even with the container body 103 made of synthetic resin. Further, since the caulking process is not required when the housing 303 and the container main body 103 are engaged, the engaging operation is extremely simple, and it can be easily applied to a container main body having a small opening diameter. In addition, since the large diameter portion 10h of the opening is engaged and the small diameter portion 103i is sealed, damage to the seal can be suppressed as compared with the case where engagement and sealing are performed at the same location. In addition, about the valve mechanism 40 etc., it is the same as that of the said embodiment, and there exists the same effect.

  Next, a sixth embodiment of the aerosol container of the present invention will be described in detail with reference to the drawings. As shown in FIG. 6, the aerosol container 6 of the sixth embodiment is composed of a container body 103 and a valve assembly 204, and the basic shape is the same as that of the fifth embodiment. In the embodiment, the cover 503 made of synthetic resin is used, but in the present embodiment, the cover 504 made of metal is used.

  More specifically, the cover 504 is a metal cylindrical body having an upper base 504 a that covers the housing 303 and the valve mechanism 40 via the valve cap 803 and covers the flange portion 10 e of the container body 103. . A stem insertion hole 504b through which the stem 41 is passed is formed in the upper bottom 504a. Then, in a state in which the cover 504 is externally fitted to the opening of the container main body 103, the cover 504 is gripped from the side, and the engaging portion 504e that engages with the flange portion 10e of the opening is formed, and the peripheral wall of the cover 504 Is deformed (reduced diameter) inward in the radial direction. Thereby, the opening part of the container main body 103 is deformed radially inward, and the inner surface of the large-diameter portion 10h of the opening part of the container main body 103 and the outer surface of the valve cap 803 are closely contacted and friction-fitted.

  As described above, in the sixth embodiment, although the cover 504 is caulked, the housing 303 and the container main body 103 are indirectly engaged by using the frictional fitting between the valve cap 803 and the container main body 103. Therefore, even if the plate thickness and material strength of the cover 504 are made smaller than those of a conventional metal mounting cup or the like, sufficient engagement force and airtightness can be ensured. Further, if the plate thickness and material strength are small, it is possible to reduce the weight and reduce the cost, and the caulking process can be performed very easily, and can be applied without difficulty to a container body having a small opening diameter.

  In addition, since the other structure is the same as that of 5th Embodiment and the effect is also the same, the same code | symbol is attached | subjected and description is abbreviate | omitted.

As mentioned above, although typical embodiment of this invention was described, this invention is not limited to the said embodiment, It can be implemented in various changes within the scope of this invention. For example, in the above embodiment, the container main body and the housing are friction-fitted, locked by an engaging claw, and screwed, but instead of this, welding or adhesion may be used, or these may be used in combination. Also good. In the first embodiment, the protruding piece integrally formed with the housing is used to urge the stem upward. In the other embodiments, the metal spring is used. It is also possible to use a synthetic resin spring separate from the housing. Moreover, as a container main body, in 1st-4th embodiment, what used the bottom part as hemisphere and the holding part was formed is used, and in 5th and 6th embodiment, the bottom part is made into inner side convex and the holding part is formed. What was not used was used, but may be used interchangeably.

1, 2, 3, 4, 5, 6 .. Aerosol containers 10, 101, 102, 103 .. Container main bodies 10a, 103a .. Bottom 10b .. Trunk 10c .. Shoulders 10d, 102d. · Flange portion 10f ··· Holding portion 10g · · Mounting portion 10h · · Small diameter portion 10i · · Small diameter portion 10j · · Stepped portion 101k · · Female screw 102m · · Male screw 100n · · Expanded diameter portions 20 and 200, 201, 202, 203, 204 ··· Valve assembly 30, 300, 301, 302, 303 · · Housing 30a, 300a, 302a, 303a · · Bottom 30b, 302b · 303b · · Notch 30c, 302c, 303c · · · Flange 30d ··· concave portions 30e, 302e, 303e · · · concave portions 30f, 302f, 303f · · communication holes 30g · · protruding pieces 30h, 300h, 30 h, 302h, 303h ·· tube portion 300i · · fitting claw 301j · · male screw 303k · · protrusion 40 · · valve mechanism 41 · · stem 41a · · stem hole 41b · · ejection hole 42 · · stem rubber 43 ..Springs 50, 501, 502, 503, 504..Fitting members (covers, screw caps)
50a, 501a, 502a, 503a, 504a ... Upper bottom 50b, 501b, 502b, 503b, 504b ... Stem insertion hole (valve cap insertion hole)
50c ·· Stepped portion 50d · · Projection portions 50e, 503e, 504e · · Locking portion 502f · · Female screw 60 · · O-ring 70 · · Dip tube 801 and 803 · · Valve caps 801a and 803a · · · Upper bottom 801b 803b, Stem insertion hole 801c, 803c, Reduced diameter portion 902, Film material 902a, Upper base 902b, Stem insertion hole

Claims (9)

  An aerosol container including a synthetic resin container body having an opening and a valve assembly that closes the opening of the container body and communicates / blocks the inside and outside of the container body, the valve assembly includes: A housing inserted into the opening is provided, and a seal member that is compressed in the radial direction is provided between the inner surface of the opening and the outer surface of the housing, and the container body and the housing are engaged in the container body. An aerosol container characterized by being fixed together.   The aerosol container according to claim 1, wherein the engagement between the container body and the housing is a friction fit.   The aerosol container according to claim 2, wherein the engagement between the container body and the housing is a friction fit between the inner surface of the container body and the outer surface of the housing by press-fitting the housing into the opening.   The aerosol according to claim 2, wherein the engagement between the container main body and the housing is a friction fit between the inner surface of the container main body and the outer surface of the cap by press-fitting a valve cap that is externally fitted and fixed to the housing into the opening. container.   The engagement between the container main body and the housing is a friction fit between the inner surface of the container main body and the outer surface of the housing by reducing the diameter of the container main body by fitting the fitting member to the container main body. 2. The aerosol container according to 2.   The aerosol container according to claim 5, wherein the diameter of the container body is reduced by screwing a screw of the container body and a screw of the fitting member.   The aerosol container according to claim 5, wherein the diameter of the container body is reduced by reducing the diameter of a metal fitting member by an external force.   The aerosol container according to claim 1, wherein the engagement between the container body and the housing is engagement between a lower end of a neck portion on the inner surface of the container body and an engagement claw on the outer surface of the housing.   The aerosol container according to claim 1, wherein the engagement between the container body and the housing is a screw engagement between a screw on the inner surface of the container body and a screw on the outer surface of the housing.

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