JP2013249074A - Aerosol container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create an aerosol container for improving quickness property and reliability of a gas venting operation by ensuring leak passage while generating deforming on an upper end of a mouth cylindrical part of a container body under a high temperature environment, in the aerosol container equipped with explosion-proof mechanism.SOLUTION: An aerosol container includes: a container body for storing a liquid content and a jetting agent at a high pressure condition; and a valve mechanism which is attached to a mouth cylindrical part 3 of a container body via a mounting cap body, and jets a liquid content. A planar view shape of the inner peripheral face 3A of the mouth cylindrical part 3 is an ellipsoidal shape, and the long diameter region (φα) of the mouth cylindrical part 3 is configured into a thin thickness shape.

Description

  The present invention relates to an aerosol container provided with an explosion-proof mechanism that prevents the container body from rupturing due to an increase in internal pressure in a high-temperature environment.

2. Description of the Related Art Conventionally, an aerosol container in which a liquid content is stored in a container together with a propellant in a high-pressure state and the liquid content is ejected from a valve mechanism attached to the upper part of the container body has been widely used.
If such an aerosol container is left in an automobile or the like that is likely to be in a high temperature environment due to direct sunlight irradiation, the pressure in the container body rises and bursts, and the valve mechanism may jump out of the aerosol container.

  For this reason, the aerosol container provided with the explosion-proof mechanism which prevents the explosion of a container main body is developed, and the following patent documents 1 and patent documents 2 etc. exist as such an aerosol container, for example.

  The aerosol containers described in Patent Document 1 and Patent Document 2 both form a longitudinal groove extending in a substantially longitudinal direction on the outer peripheral surface of the mouth portion of the container body, and before the container body ruptures, the mouth portion and the mouth portion. The seal pressure between the mounting cap and the sealing cap is reduced to release the sealed state, and the internal liquid content and propellant are released to the outside through the longitudinal groove, thereby suppressing an increase in the internal pressure of the container body. It is the structure made to do.

  Here, the method of reducing the sealing pressure is a configuration in which the aerosol container described in Patent Document 1 uses deformation of the mounting cap, whereas the aerosol container described in Patent Document 2 uses thermal deformation on the container side. It is a configuration.

  That is, in the aerosol container described in Patent Document 1, when the internal pressure abnormally rises at a high temperature, an upward force is applied to the housing, the lower end edge of the mounting cap spreads outward, and the mounting cap rises somewhat. The sealing pressure of the gasket or stem rubber becomes insufficient, and the gas inside the container leaks to the outside.

  On the other hand, in the aerosol container described in Patent Document 2, the lower end portion 26 of the mouth portion 14 of the container body 11 placed at a high temperature is thermally deformed, and the holding force for holding the hem portion 28 of the mounting cup 12 is weakened. At the same time, the internal pressure of the container body 11 is increased and the container body 11 is deformed, and the neck part 15 is deformed, and the skirt part 28 of the mounting cup 12 is pushed and expanded. It moves slightly in the axial direction of the container main body 11 together with the mechanism 13, and a leak passage 29 is formed between the flange portion 18A of the valve mechanism 13 and the upper surface 14A of the mouth portion 14 of the container main body 11.

JP 2004-99180 A Japanese Patent Laid-Open No. 7-300188

  In the aerosol container described in Patent Document 1, since the increased internal pressure acts on the housing and directly lifts the mounting cap, if the internal pressure does not act uniformly, the mounting cap cannot be lifted evenly and the gas is vented. There is a problem that work tends to be insufficient. In particular, as the opening area of the mouth becomes larger, such a problem tends to become more prominent.

  On the other hand, since the aerosol container described in Patent Document 2 is configured to use the deformation of the neck, the mounting cap can be lifted up evenly, and the degassing operation is performed more reliably than in Patent Document 1. Is possible.

  However, in the aerosol container described in Patent Document 2, the amount of deformation of the neck is extremely small, so that the mounting cup is not sufficiently moved in the axial direction, and there is a limit to performing the degassing operation quickly and reliably. There's a problem.

  In order to solve the problems in the prior art described above, in the aerosol container equipped with the explosion-proof mechanism, by securing a leak passage by causing deformation at the upper end of the mouthpiece portion of the container body in a high temperature environment, An object is to create an aerosol container with improved degassing speed and reliability.

Among the means for solving the above problems, the main means of the present invention is as follows.
An aerosol container comprising: a container body that contains liquid content and a propellant in a high-pressure state; and a valve mechanism that is attached to a mouth tube portion of the container body via a mounting cap and ejects the liquid content. It is characterized in that the shape of the inner peripheral surface of the cylindrical portion in plan view is elliptical and that the thickness of the major axis region of the elliptical portion in the radial thickness of the mouth cylindrical portion is thin.

  In the aerosol container composed of the above means, the mechanical strength of the thin wall portion is reduced by forming the thin wall portion with a thin radial portion of the mouth tube portion corresponding to the elliptical long diameter region. For this reason, the main body container is placed in a high temperature environment, the internal pressure is abnormally increased, and the increased internal pressure acts to facilitate the deformation of the mouth tube portion starting from the thin wall portion. When the temperature further increases, further deformation of the mouth tube portion is promoted by applying thermal deformation.

  According to another aspect of the present invention, in the aerosol container according to claim 1, outer grooves are respectively formed on the outer peripheral surface of the mouth tube portion and in an elliptical long diameter region.

  In the above means, the outer grooves are arranged on the outer peripheral surface corresponding to the long-diameter region, that is, the outer peripheral surface corresponding to the thin-walled portion, thereby facilitating further deformation by further promoting the partial thinning of the mouth-tube portion. To achieve

  According to another aspect of the present invention, in the aerosol container according to claim 1 or 2, the container body is formed of polyethylene terephthalate or polybutylene terephthalate.

  With the above means, the inner peripheral surface and the outer groove of the mouth tube portion having an elliptical shape can be easily formed, and the deformation of the mouth tube portion due to the increase in internal pressure is achieved.

  According to another aspect of the present invention, there is provided the aerosol container according to any one of claims 1 to 3, wherein the valve mechanism includes a housing having a flange, a discharge passage for discharging liquid contents to the outside, and a discharge passage. A stem having a communication passage communicating therewith, and being movably provided by being inserted into an insertion hole formed on the upper surface of the mounting cap; and closing and releasing the insertion hole according to the movement of the stem. A stem rubber, a packing disposed between the upper surface of the mouth tube portion of the container body and the lower surface of the flange, a coil spring built in the housing and biasing the stem upward, and a lower end of the housing And a dip tube extending in the direction of the bottom of the communication container main body.

In the above means, the liquid content and the propellant (gas) are accommodated in the container main body in a high pressure state, and the liquid content is discharged to the outside.
Also, when placed in a high temperature environment, the mounting cap is lifted by deformation of the mouth tube portion on the main body container side, and a leak passage is formed between the upper surface of the mouth tube portion and the packing disposed on the lower surface of the mounting cap. To do.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the main configuration of the present invention, when the internal pressure rises, the mouth tube portion having the elliptical inner peripheral surface is easily deformed starting from the thin portion provided in the long diameter region, and in the short diameter region of the upper end surface. The provided push-up surface is raised and deformed so that it rises upward. As a result, since the push-up surface lifts the mounting cap evenly, a leak passage is formed between the leak surface provided in the long diameter region of the upper end surface and the packing provided on the lower surface of the mounting cap, and the internal gas The punching operation can be performed quickly and reliably. Therefore, the safety of the aerosol container can be improved.

  Further, in the configuration in which the outer groove is formed on the outer peripheral surface of the mouth tube portion and in the elliptical long diameter region according to claim 2, the upper surface of the mouth tube portion is deformed upward from the push-up surface. Since it can make it easy, a leak channel | path is ensured and the quickness and reliability of a degassing operation | work can be improved further.

  Moreover, in the structure which formed the container main body of Claim 3 with the polyethylene terephthalate or the polybutylene terephthalate, while being able to accommodate a liquid content and a propellant in a high-pressure state, when being put in a high temperature environment Further, since it becomes possible to cause the mouth tube portion to be deformed due to the increase in internal pressure accompanying the temperature rise, it is possible to provide an aerosol container excellent in the speed and reliability of the degassing operation.

  The valve mechanism according to claim 4, wherein the valve mechanism includes a housing having a flange, a discharge passage for discharging the liquid contents to the outside, and a communication passage communicating with the discharge passage, and is formed on an upper surface of the mounting cap. Stem inserted through the hole and provided movably; Stem rubber provided on the housing for closing and releasing the insertion hole according to the movement of the stem; Upper surface of the mouth tube portion of the container body and lower surface of the flange And a packing that is housed in the housing and that biases the stem upward, and a dip tube that communicates with the lower end of the housing and extends toward the bottom of the container body. Therefore, the liquid content can be reliably discharged from the inside of the container body containing the liquid content and the propellant (gas) in a high pressure state. In addition, when placed in a high temperature environment, the mounting cap is lifted by deformation of the mouth tube portion on the main body container side, and a leak passage is formed between the upper surface of the mouth tube portion and the packing disposed on the lower surface of the mounting cap. The degassing operation can be performed reliably and quickly.

It is a front view which shows the Example of the aerosol container of this invention. It is sectional drawing which shows the structure of a valve mechanism while being a fragmentary sectional view of an aerosol container. It is a top view which shows the nozzle part of the container main body which comprises an aerosol container. FIG. 4 is a half cross-sectional view showing a mouth tube portion before deformation, wherein A is a half cross-sectional view along line AA in FIG. 3, and B is a half cross-sectional view along line BB in FIG. 3. It is sectional drawing which shows the mouth_tube | cylinder part after a deformation | transformation, A is AA sectional view taken on the line of FIG. 3, B is BB sectional drawing of FIG. It is sectional drawing which shows the mouth tube part after a deformation | transformation in the state which mounted | wore with a valve mechanism, A is sectional drawing equivalent to the AA cross section of FIG. 3, B is sectional drawing equivalent to the BB sectional view of FIG. FIG.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a front view showing an embodiment of an aerosol container according to the present invention, FIG. 2 is a partial sectional view of the aerosol container and a sectional view showing a configuration of a valve mechanism, and FIG. 3 is a mouthpiece of a container main body constituting the aerosol container. FIG. 4 is a half sectional view showing the mouth tube part before deformation, A is a half sectional view taken along line AA in FIG. 3, and B is a half sectional view taken along line BB in FIG. 5 is a cross-sectional view showing the deformed mouth tube portion, A is a cross-sectional view taken along line AA in FIG. 3, B is a cross-sectional view taken along line BB in FIG. 3, and FIG. 4 is a cross-sectional view showing a rear mouth tube portion, wherein A is a cross-sectional view corresponding to a cross section taken along line AA in FIG. 3, and B is a cross-sectional view corresponding to a cross section taken along line BB in FIG.

An aerosol container 1 shown in FIG. 1 includes a bottomed cylindrical container body 2 and a valve mechanism 10 mounted on the upper end of the container body 2 via a mounting cap 20.
The container body 2 includes a mouth tube portion 3 provided at the uppermost end, a neck portion 4 formed perpendicularly downward from a lower end portion 3c of the mouth tube portion 3, and a shoulder formed in a diameter increasing shape downward from the neck portion 4. Part 5, a body part 6 formed with a substantially constant diameter from the shoulder part 5 downward, and a bottom part 7 made of petaloid, and made of, for example, polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) It is integrally molded as a well-known biaxial stretch blow molded product using a synthetic resin as a material. The container body 2 is formed to have a relatively large thickness, and further, the bottom portion 7 is formed in a petaloid shape, so that the container as a whole has excellent pressure resistance characteristics. The liquid content liquid and the gaseous propellant are filled in such a container body 2.

As shown in FIG. 3, the inner peripheral surface 3A of the mouth tube portion 3 has an ellipse shape having a major axis φα and a minor axis φβ. The thickness in the radial direction of the mouth tube portion 3 is the thinnest in the region on the long diameter φα side (the long diameter region φα), and this portion is the thin portion 3a, which is the portion with the weakest mechanical strength. Further, the region on the short diameter φβ side (short diameter region φβ) of the mouth tube portion 3 is configured to have the greatest thickness in the radial direction, and is a portion where the mechanical strength is most reinforced.
As shown in FIG. 3, among the upper end surface 3C of the mouth tube portion 3, the upper end surface 3C of the long diameter region φα functions as the push-up surfaces 3C1 and 3C1, and the upper end surface 3C of the short diameter region φβ is the leak surface 3C2. , 3C2.

As shown in FIG. 3, outer grooves 3 b and 3 b are formed on the outer peripheral surface 3 </ b> B of the mouth tube portion 3 and at positions that are axisymmetric with respect to the long diameter region φα. As shown in FIG. 4, the outer grooves 3b and 3b shown in this embodiment are formed by vertical grooves that penetrate the outer peripheral surface 3B of the mouth tube portion 3 in the axial direction (or vertical direction).
However, the outer grooves 3b and 3b are not limited to the vertical grooves that pass therethrough, and for example, the upper end of the outer groove 3b may be connected and closed, and only the lower end may be opened.

  As shown in FIG. 2, the valve mechanism 10 includes a housing 11 having a flange 12 in which a stem 13 is built so as to be movable in the axial direction. A dip tube 14 extending in the direction of the bottom 7 of the container body 2 is fitted to the lower portion of the housing 11. A packing 15 is provided between the flange 12 and the upper end surface 3C of the mouth tube portion 3 of the container body 2. The mounting cap 20 covers the outer periphery of the mouth tube portion 3 of the container body 2 from the flange 12 and extends to the lower end portion 3c of the outer peripheral surface 3B of the mouth tube portion 3 so that the housing 11 is firmly assembled to the container body 2.

  A coil spring 16 is built in the housing 11 and urges the stem 13 upward. In addition, a discharge passage 13a extending in the axial direction and a communication passage 13b that is formed in the radial direction and communicates with the discharge passage 13a are provided at the center of the stem 13.

  A stem rubber 17 that closes the communication path 13b is interposed between the top surface 11A of the housing 11 and the lower surface of the mounting cap 20. At normal times, the stem rubber 17 pressurizes the communication path 13b by the urging force of the coil spring 16, so that the communication path 13b is closed. When the stem 13 is pressed downward against the urging force of the coil spring 16, the communication path 13b is released from the closed state, so that the liquid content in the container body 2 is transferred from the dip tube 14 into the housing 11 and the communication path. It is guided to the discharge passage 13a through 13b and discharged from the tip of the discharge passage 13a to the outside.

The mounting cap 20 is made of, for example, an aluminum alloy. The mounting cap 20 includes an upper surface portion 20a having an insertion hole 20b into which the stem 13 is inserted, a cylindrical skirt portion 20c continuously provided downward from a peripheral edge of the upper surface portion 20a, and a skirt portion 20c. The engaging portion 20d is formed by bending the lower end.
The mounting cap 20 is crowned on the upper portion of the mouth tube portion 3 by fixing the engaging portion 20d by caulking and fixing the mounting cap 20 from above the valve mechanism 10 mounted on the mouth tube portion 3.

When the aerosol container 1 is placed in a high temperature environment, the internal pressure increases as the temperature in the container body 2 increases.
As shown in FIGS. 5A and 5B, when the container body 2 is placed in a high temperature environment, the increased internal pressure presses the container body 2 outward. In particular, since the applied pressure acting on the shoulder 5 spreading in a diameter-enhancing manner presses the shoulder 5 obliquely upward, the thin-walled portion 3a provided in the long diameter region φα having the weakest mechanical strength is deformed. For this reason, as shown in FIGS. 5A and 5B, the push-up surfaces 3C1 and 3C1 provided in the short diameter region φβ orthogonal to the long diameter region φα are raised and deformed upward.
As a result, as shown in FIG. 6A, since the push-up surfaces 3C1 and 3C1 lift the mounting cap 20 evenly, there is a leakage between the packing 15 and the leak surfaces 3C2 and 3C2 in the long diameter region φα orthogonal to the short diameter region φβ. Passages 21 and 21 are formed.

Then, as shown in FIGS. 6A and 6B, when the mouth tube portion 3 is deformed, distortion occurs in the contact portion between the outer peripheral surface 3B of the mouth tube portion 3 and the skirt portion 20c of the mounting cap 20, and the engagement is thereby caused. The engagement state between the joint portion 20d and the lower end portion 3c is released. For this reason, the liquid contents and the propellant can escape from the container body 2 to the outside through the leak passages 21 and 21 and the outer grooves 3b and 3b formed in the outer peripheral surface 3B.
Although the liquid contents and the propellant can be released to the outside even if the outer grooves 3b and 3b are not formed, the configuration in which the outer grooves 3b and 3b are formed as in the above embodiment is more reliable and The liquid contents and the propellant can be quickly released to the outside.

  That is, when the shoulder 5 receives an obliquely upward pressure as the internal pressure rises, the force concentrates on the outer grooves 3b and 3b, which are the parts with the weakest mechanical strength. Then, as shown in FIG. 5B, the outer groove 3b is displaced so that the lower end side spreads outward with the upper end as the base end, and is deformed into a generally fan shape as a whole. Such deformation of the outer grooves 3b and 3b occurs on the outer peripheral surface 3B of the mouth tube portion 3 and on both sides of the long diameter region φα, respectively, and promotes deformation of the push-up surfaces 3C1 and 3C1.

  As a result, the leak passages 21 and 21 formed between the packing 15 and the leak surfaces 3C2 and 3C2 of the mouth tube portion 3 in the short diameter region φβ can be easily secured, and the degassing operation can be performed more quickly and reliably. Can do. Therefore, it can be set as the aerosol container provided with the explosion-proof function excellent in safety | security.

  As mentioned above, although the structure of this invention and its effect were demonstrated along the Example, embodiment of this invention is not limited to the said Example.

In the above embodiment, the configuration has been described in which the inner peripheral surface 3A of the mouth tube portion 3 is formed in an elliptical shape and the outer grooves 3b and 3b are arranged on the outer peripheral surface 3B corresponding to the long diameter region φα. By forming at least the inner peripheral surface 3A of the mouth tube portion 3 in an elliptical shape, it is possible to lift the mounting cap 20 evenly to form the leak passages 21, 21.
As described above, if the outer grooves 3b and 3b are formed on the outer peripheral surface 3B corresponding to the long diameter region φα in addition to this configuration, the deformation of the mouth tube portion 3 is further facilitated and the mounting cap 20 is more reliably secured. Therefore, the leak passages 21 and 21 can be more reliably secured.

  In the above embodiment, the outer groove 3b is described as a vertical groove having a constant groove width from the upper end to the lower end. However, the groove width on the lower end side is previously formed wider than the groove width on the upper end side. May be. In this configuration, deformation of the mouth tube portion 3 under a high temperature environment can be promoted, so that the formation of the leak passages 21 and 21 having a large opening area can be achieved more reliably.

  In the above embodiment, the case where the liquid content is discharged by pressurizing the stem 13 downward has been described. However, the present invention is not limited to the above embodiment, and the stem 13 has an outer diameter. It may be an aerosol container in which the liquid content is discharged by pressing and tilting in the direction.

  The aerosol container of the present invention can be used in a wider area in the field of aerosol containers having an explosion-proof mechanism.

1; aerosol container 2; container body 3; mouth tube portion 3A; inner peripheral surface 3B of mouth tube portion; outer peripheral surface 3C of mouth tube portion; upper end surface 3C1 of mouth tube portion; Leak surface 3a on the end face; Thin wall portion 3b; Outer groove 3c; Lower end portion 4 of outer peripheral surface of mouth tube portion; Neck portion 5; Shoulder portion 6; Body portion 7; Bottom portion 10; Valve mechanism 11; Surface 12; Flange 13; Stem 13a; Discharge passage 13b; Communication passage 14; Dip tube 15; Packing 16; Coil spring 17; Stem rubber 20; Mounting cap 20a; Portion 21; leak passage φα; major axis or major axis region φβ; minor axis or minor axis region

Claims (4)

  A container main body (2) for storing the liquid contents and the propellant in a high pressure state, and the liquid contents are ejected by being mounted on the mouth tube portion (3) of the container main body (2) via a mounting cap (20). An aerosol container having a valve mechanism (10) for making the inner peripheral surface (3A) of the mouth tube portion (3) have an elliptical shape in plan view and the diameter of the mouth tube portion (3) An aerosol container characterized in that an elliptical long diameter region (φα) is formed thin in a thickness in a direction.   The aerosol container according to claim 1, wherein outer grooves (3b) are respectively formed on the outer peripheral surface (3B) of the mouth tube portion (3) and in an elliptical long diameter region (φα).   The aerosol container according to claim 1 or 2, wherein the container body (2) is formed of polyethylene terephthalate or polybutylene terephthalate.   The valve mechanism (10) has a housing (11) having a flange (12), a discharge passage (13a) for discharging liquid contents to the outside, and a communication passage (13b) communicating with the discharge passage (13a). And a stem (13) that is inserted through an insertion hole (20b) formed in the upper surface of the mounting cap (20) and is movably provided, and a movement of the stem (13) provided in the housing (11). In response, the stem rubber (17) for closing and releasing the insertion hole (20b), and the upper surface of the mouth tube portion (3) of the container body (2) and the lower surface of the flange (12) A packing (15) to be arranged, a coil spring (16) which is built in the housing (11) and urges the stem (13) upward, and communicates with a lower end of the housing (11). The container body (2) bottom (7) and dip tube (14) extending in the direction, the aerosol container according to any one of constituted claims 1 to 3 have the.

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