JP2001294285A - Aerosol container mounting cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol container mounting cap which can be removed without using a tool in a reusable condition, and which is prevented from coming off when the inner pressure of the container is high. SOLUTION: This mounting cap is provided with a mounting cap main body 10 which surrounds a neck part 3 and is formed with a plurality of fin parts 18 having bending elasticity on the periphery of a top face part 10a, and with a cap 20 which, by being mounted on the threaded outer peripheral face of the parts 18 freely mountable and dismountable, holds the outer peripheral face and controls the opening of the parts 18. The inner peripheral face of the parts 18 is formed with a fitting protrusion 17 which fits the bead bottom edge 3d of a bead part 3b formed on the outer periphery of the neck part 3 and has a fitting face 17a inclining upward to be apart gradually from the neck part 3. The height of the fitting face 17a is set to fit the bead bottom edge 3d by elastically shrinking a gasket 5 between the back face of the top face part 10a and the neck part 3 in a seal condition in mounting the cap main body 10 on the neck part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a valve having a stem insertion opening at the center thereof and a valve for ejecting the contents by pushing down the stem inside the upper surface of the aerosol container which covers the opening at the tip of the neck. The present invention relates to a mounting cap for an aerosol container that is configured and attached to a neck portion around an upper surface portion.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 11-292167 discloses a curl portion for engaging a separating member such as a driver with a mounting cap with a valve attached to a bead portion of a neck portion of an aerosol container. And an aerosol container capable of separating and discarding the mounting cap.

[0003]

However, this mounting cap may be reused after being removed, or may be unintentionally squirted out of contents when removed under a condition in which the internal pressure in the container is high, or a risk of ignition or the like. Sex is not considered.

In view of the foregoing, the present invention provides a mounting cap for an aerosol container that can be removed in a state where it can be reused without tools and that can be prevented from being detached when the internal pressure of the container is high. The purpose is to:

[0005]

According to the present invention, in order to achieve the above object, according to the first aspect, a stem insertion hole is provided at a center portion and an upper surface portion for covering an opening at a tip end of a neck portion of an aerosol container. On the inner side, a valve for ejecting the contents by pushing down the stem is formed, and in the mounting cap of the aerosol container attached to the neck portion around the upper surface portion, the mounting cap surrounds the neck portion and exhibits bending elasticity. A mounting cap body having a fin portion formed around the upper surface portion, and a holding cap for holding the outer peripheral surface to restrain the spread of the fin portion by being detachably attached to the outer peripheral surface of the fin portion. The inner peripheral surface of each fin is inclined so as to engage with the bead lower edge of the bead formed on the outer periphery of the neck and gradually move away from the neck upward. An engagement projection having an engagement surface formed thereon, and the height position of the engagement surface is such that when mounting the mounting cap body to the neck portion, the gasket is interposed between the back surface of the upper surface portion and the upper end surface of the neck portion. Is elastically compressed in a sealed state so as to engage with the lower edge of the bead.

The plurality of fins exhibiting bending elasticity are once expanded and mounted on the neck portion, and the engagement surface where the expansion of the engagement projection is restored is formed on the lower edge of the bead in a state where the gasket is compressed. Engage. This engaged state is ensured by mounting the holding cap. When the aerosol container is filled with the contents, the inclined engagement surface tries to expand along the bead lower edge of the bead portion in conjunction with the upper portion being pressed upward by the high internal pressure. . At this time, the outer peripheral surface of the fin is pressed against the inner peripheral surface of the holding cap, and detachment of the detachable holding cap is restricted.

In order to more reliably restrain the holding cap from being detached in a state where the internal pressure is high and the internal pressure is reduced due to the release of the contents, the outer peripheral surface of the fin and the holding member can be restrained. The inner peripheral surface of the holding cap is formed with a screw thread that is screwed together, or one of the fin portion and the holding cap is formed with an engaging groove, and the other is rotated by rotating the holding cap into the engaging groove. An engagement portion is formed to engage and restrain the holding cap from being detached.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mounting cap for an aerosol container according to an embodiment of the present invention will be described with reference to FIGS. In the existing aerosol container 1 made of synthetic resin, a bead portion 3b is integrally formed in a convex shape on an outer peripheral portion of a tip portion of a neck portion 3 having an opening portion 3a, and a mounting cap is usually fitted to a lower edge thereof. It is. The mounting cap 19 of the present invention includes a mounting cap body 10 made of a synthetic resin that fits into such a bead portion 3b, and a screw cap 20 of the same material as a holding cap mounted around the periphery of the main body. It is configured.

On the inside of a circular upper surface 10a covering the opening 3a of the mounting cap main body 10, a stem insertion opening 11 corresponding to a normal mountain cap is provided.
The housing 15 has a housing 15 coaxial with the housing 15.
The contents discharge valve is held by 5a. That is, the housing has a stem 12 that is pushed down through the stem insertion opening 11 and a coil spring 14 that returns the pushed-down stem to a normal position above.
And an annular stem gasket 13 for sealing a stem hole 12a formed in the side wall of the stem 12 at a normal position. Further, a dip tube 1 for introducing the contents of the aerosol container 1 is provided at the bottom of the housing 15.
6 has been inserted.

A circle around the lower side of the upper surface 10a of the mounting cap body 10 is slightly narrower than the height width of the neck portion 3, exhibits bending elasticity, and has an inner diameter corresponding to the outer peripheral surface of the bead portion 3b. A plurality of, for example, four fins 18, which are divided peripheral surfaces having an arc-shaped inner peripheral surface, are integrally formed at intervals. A thread 18a is provided on the outer peripheral surface of the fin.
Are formed.

On the other hand, the stem insertion port 2 of the screw cap 20
A peripheral surface portion 21 having a screw thread 21a screwed to the screw thread 18a is formed on the inner peripheral surface of the lower periphery of the upper surface portion 20a having the screw 5. The inner diameter of the thread-shaped peripheral surface portion is set so as to hold the thread-shaped outer peripheral surface of the fin portion 18 and restrict its expansion when screwed into the mounting cap body 10.

An engagement surface 17a is formed on a part of the inner peripheral surface of each fin 18 in the arc direction, which engages with the lower edge 3d of the bead and is inclined upward and away from the neck 3 gradually.
Is formed on the upper surface, and a sliding surface 17b is formed on the lower surface of the engaging convex portion 17 so as to be inclined downward and gradually toward the separating direction. This sliding surface
When the mounting cap body 10 is pushed into the bead portion 3b, the mounting cap body 10 slides on the bead upper edge portion 3e to expand the fin portion 18.

An annular gasket 5 surrounding the housing holder 15a is mounted on the inner surface of the upper surface portion 10a of the mounting cap body 10, and when the mounting cap body 10 is fitted to the neck portion 3, Each annular projection 10c, 3
The gasket 5 is sandwiched by c. Engagement surface 17a
Is set at a height position at which the gasket 5 can be elastically compressed in a sealed state and engaged with the bead lower edge portion 3d during such fitting of the mounting cap body 10.

The operation of the mounting cap 19 thus configured is as follows. When attaching the mounting cap body 10 to the bead portion 3b of the aerosol container 1 filled with the liquid content, the engaging projection 1
7. When the sliding surface 17b of 7 is pressed against the upper edge portion 3e of the bead and pushed in from above, the fin portion 18 is inserted while expanding along the inclination thereof, and the lower edge portion of the bead is compressed with the gasket 5 compressed. The engaging surface 17a is elastically restored from the expanded state and engages with 3d.

Next, the screw cap 20 is moved to the upper surface portion 10.
By being screwed until the a and 20a come into contact with each other, the expansion of the fin 18 is restrained and the engagement state of the engagement surface 17a with the bead lower edge 3d is ensured. Next, when the propellant is filled in the aerosol container 1, an internal pressure higher than the atmospheric pressure is generated in the aerosol container 1. As a result, an upward pressing force is generated on the upper surface portion 10a of the mounting cap main body 10. When the inclined engaging surface 17a attempts to expand along the bead lower edge portion 3d following this, a pressing force is generated. Then, the fin 18 whose expansion is restricted is pressed against the screw cap 20, and its rotation operation is restricted. Therefore, during use of the aerosol container 1, the mounting cap 19 is detached, or the screw cap 20 is rotated to prevent the ejection of the contents.

When the discharge of the contents proceeds and a low internal pressure is reached at which the propellant is almost exhausted, the pressure contact of the fin 18 with the screw cap 20 due to the internal pressure is released, and the rotating operation in the removing direction by hand becomes possible. Become. Therefore, the screw cap 20 is rotated to be removed, and then the fin 18 is expanded while the engaging surface 17 a inclined along the bead lower edge 3 d is slid by hand, and the mounting cap body 10 is pulled out. As a result, the mounting cap 19 is removed in a reusable state.

FIG. 3 shows an embodiment for preventing the mounting cap body 10 from rotating. A convex portion 3f as a stopper which can abut the side edge 18b of the fin portion 18 is provided on the outer peripheral surface of the bead portion 3b. Is formed. Thereby, when performing a rotation operation for attaching and detaching the screw cap 20, even if the mounting cap main body 10 rotates together, it is restrained by the convex portion 3f.

Similarly, FIG. 4 schematically shows an embodiment for preventing rotation of the mounting cap body 10 with a screw portion, and the peripheral surface portion 21 is slightly wider at the lower end portion of the fin portion 18 described above. A knob 18f is formed extending from the lower end of the narrowed screw cap 20 to a position where the screw cap 20 becomes flush. At the time of rotating the screw cap 20, the knob 18f is pinched with a finger.

FIG. 5 shows an embodiment of a mounting cap without screws. An engaging projection is formed on the inner peripheral surface of the fin 38 of the mounting cap body 30 in the same manner as the fin 18 described above. However, the threads on the outer peripheral surface have been eliminated. Correspondingly, the peripheral surface portion 41 of the holding cap 40 has an inner diameter corresponding to the outer diameter thereof so as to hold the outer peripheral surface of the fin portion 38 in a contact state without providing a thread. A pin-shaped engagement portion 35 is projected from an outer peripheral surface of the fin portion 38, and an elongated engagement groove 45 is formed on the peripheral surface portion 41, which is opened at a lower end and gradually bends vertically upward and extends horizontally. Have been. Thus, the holding cap 40 is engaged with the mounting cap body 30 in a bayonet manner. The holding cap 40 may be made of metal.

Similarly, FIG. 6 shows an embodiment of a mounting cap without a screw. A fin 38 of the mounting cap body 30 is replaced with a locking portion at the lower end instead of the locking portion 35 described above. Reference numeral 36 projects outward. Correspondingly, an engagement groove 46a is formed by an L-shaped protrusion 46 at the lower end of the peripheral surface portion 41 instead of the engagement groove 45 described above. By rotating this engagement groove at the gap between the fins 38, the distal end engages the tapered engagement portion 36.

[0021]

According to the first aspect of the present invention, by sequentially removing the holding cap and the mounting cap body,
The mounting cap can be removed from the aerosol container as it is, and can be reused. The holding cap ensures that the mounting cap is attached to the neck of the mounting cap body when the internal pressure is high, and prevents the mounting cap during use from being detached or spontaneously coming off. The present invention can also be applied to an existing aerosol container having a bead formed in a neck portion.

According to the second or third aspect of the present invention, the holding cap is securely mounted on the mounting cap body regardless of the internal pressure, and when the discharge proceeds, the holding cap can be removed by a rotating operation without a tool, and the internal pressure can be removed. Is more securely attached when the height is higher. In this case, according to the invention of claim 4 or claim 5, even when the mounting cap body rotates together with the rotation operation when attaching and detaching the holding cap, the rotation is restricted, and the rotation operation is performed smoothly.

[Brief description of the drawings]

FIG. 1 is a sectional view of a mounting cap of an aerosol container according to an embodiment of the present invention.

FIG. 2 is a perspective view before mounting the mounting cap.

FIG. 3 is a perspective view of a main part of the embodiment in which the mounting cap has a rotation preventing function.

FIG. 4 is a cross-sectional view of a main part of another embodiment in which the mounting cap has a rotation preventing function.

FIG. 5 is a perspective view of a main part before mounting a mounting cap according to another embodiment.

FIG. 6 is a perspective view of a main part before mounting a mounting cap according to still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aerosol container 3 Neck part 3b Bead part 3d Bead lower edge part 3f Convex part 5 Gasket 10, 30 Mounting cap main body 10a, 20a Upper surface part 17 Engagement convex part 17a Engagement surface 18, 38 Fin part 20 Screw cap 40 Holding Cap 35, 36 Engagement part 45, 46a Engagement groove

Claims (5)

[Claims] 1. A valve for ejecting contents by pushing down a stem is provided inside an upper surface portion provided with a stem insertion opening at a central portion and covering an opening at a tip of a neck portion of an aerosol container. An aerosol container mounting cap mounted around the neck portion around the neck portion, wherein a plurality of fin portions surrounding the neck portion and exhibiting bending elasticity are formed around an upper surface portion; and A holding cap that is detachably attached to the outer peripheral surface to hold the outer peripheral surface and restrain the expansion of the fin portion; and the inner peripheral surface of each of the fin portions includes the neck portion. An engagement projection having an engagement surface that is engaged with a bead lower edge portion of a bead portion formed on the outer periphery of the bead portion and is gradually inclined upward and away from the neck portion; The height position of the engaging surface is such that when the mounting cap body is mounted on the neck portion, the gasket interposed between the inner surface of the upper surface portion and the upper end surface of the neck portion is elastically compressed in a sealed state to bead. A mounting cap for an aerosol container, which is set so as to be able to engage with a lower edge. 2. The mounting cap for an aerosol container according to claim 1, wherein the outer peripheral surface of the fin portion and the inner peripheral surface of the holding cap are formed with threads that screw together. 3. An engaging groove formed on one of the fin portion and the holding cap, and the other engaging portion engaging with the engaging groove by rotation of the holding cap to restrain detachment of the holding cap. The mounting cap for an aerosol container according to claim 1, wherein: 4. A projection formed on the outer peripheral surface of the neck so as to abut on a side edge of the fin so as to restrain rotation of the fin. 4. The mounting cap of the aerosol container according to 3. 5. A mounting cap for an aerosol container according to claim 2, wherein a knob for gripping at the time of rotating the holding cap is formed at a lower end of the fin.