JP2011147920A - Jetting device - Google Patents

Jetting device Download PDF

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JP2011147920A
JP2011147920A JP2010013595A JP2010013595A JP2011147920A JP 2011147920 A JP2011147920 A JP 2011147920A JP 2010013595 A JP2010013595 A JP 2010013595A JP 2010013595 A JP2010013595 A JP 2010013595A JP 2011147920 A JP2011147920 A JP 2011147920A
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groove
nozzle
jetting
nozzle tip
injection device
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JP5614043B2 (en
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Akira Nonomura
著 野々村
Kenji Sekiya
健次 関谷
Tatsuo Haneza
達夫 羽座
Yuki Yokoyama
勇樹 横山
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Kao Corp
Mitani Valve Co Ltd
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Kao Corp
Mitani Valve Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
    • B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jetting device which jets a spray of a large spray pattern in which jetting density is small and uniform and spray particles are small and which makes the jetting mild. <P>SOLUTION: The jetting device 10 having a jetting chip 20 with a jetting port 22 opened and a housing 11 to which the jetting chip 20 is mounted, and jetting fluid flowing into the housing 11 from the jetting port 22, has, in the inner wall of the jetting chip 20, a plurality of grooves 23 forming a swirling flow from an outer periphery toward the jetting port 22, and a merging part 24 where the grooves 23 join and lead to the jetting port. A groove bottom face 23b is tilted so that the depth in the merging part 24 side is deeper in relation to an outer periphery part 21 of the jetting chip 20, and a forming face of the groove 23 is a plane vertical to a center line Lb of the jetting port 22. The housing has a center post 14 abutting on the forming face of the groove 23. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、容器本体の口部に装着され、内容液を噴霧させるために有用な噴射装置に関する。   The present invention relates to an injection device which is attached to a mouth portion of a container body and is useful for spraying a content liquid.

従来、エアゾール容器やポンプ容器から内容液を噴霧させる場合、それらの容器本体の口部に、噴口チップを備えた噴射装置が装着されており、噴口チップの形状は、目的とする噴霧パターンに応じて変えられている。   Conventionally, when spraying the liquid contents from an aerosol container or a pump container, an injection device equipped with a nozzle tip is attached to the mouth of the container body, and the shape of the nozzle tip depends on the target spray pattern Has been changed.

例えば、噴霧される流体の拡散角を広げる場合に、有底筒状で底部に噴口が開口した噴口チップの当該底部内壁に複数の溝を放射状に形成することが知られている。この噴口チップの底部内壁に、柱状部材の先端面を当接させることにより、柱状部材の外周を流れて噴口チップの外周部に達した流体が、柱状部材の先端面と噴口チップの底部との間に形成される放射状の流路を通り、噴口から噴射されるようにすると、噴射した流体は旋回流により拡散するので、噴霧パターンを広げることが可能となる（特許文献１）。   For example, when widening the diffusion angle of the fluid to be sprayed, it is known to form a plurality of grooves radially on the inner wall of the bottom of the nozzle tip having a bottomed cylindrical shape and an opening at the bottom. By bringing the tip end surface of the columnar member into contact with the bottom inner wall of the nozzle tip, the fluid that flows through the outer periphery of the columnar member and reaches the outer periphery of the nozzle tip is formed between the tip surface of the columnar member and the bottom of the nozzle tip. If it passes through the radial flow path formed between them and is jetted from the jet nozzle, the jetted fluid diffuses due to the swirling flow, so that the spray pattern can be expanded (Patent Document 1).

特開２００６−１５２９９号公報JP 2006-15299 A

しかしながら、噴口チップに複数の溝を放射状に形成して、噴口チップの外周部から噴口に至る流体の流路を放射状にしても、噴霧パターンの広さが不十分であったり、広げた噴霧パターン内では噴霧粒子の密度に偏りがあったり、噴霧粒子も大きく、マイルドな噴霧を得にくいという問題があった。   However, even if a plurality of grooves are formed radially on the nozzle tip and the flow path of the fluid from the outer periphery of the nozzle tip to the nozzle is radial, the spray pattern is insufficient or widened Inside, there was a problem that the density of the spray particles was uneven, the spray particles were large, and it was difficult to obtain a mild spray.

これに対し、本発明は、噴霧パターンが大きく、かつ噴霧パターン内での噴射密度が均一で小さく、噴霧粒子も小さく、噴射をマイルドにする噴射装置を提供することを目的とする。   On the other hand, an object of the present invention is to provide an injection device that has a large spray pattern, a uniform spray density in the spray pattern, a small spray particle, and makes the spray mild.

本発明者は、噴口チップに、噴口に向かう旋回流が形成されるように複数の溝を形成する場合に、溝底面を傾斜させることにより溝深さを溝の合流部に向かって深くすると、噴霧パターンが広がると共に噴射密度が小さく均一で噴射がマイルドになること、また、この場合に溝の形成面を、噴口の中心軸に対して垂直な平面とすると、この平面と、ハウジングに形成されているセンターポストの先端面とを容易に密着させることができるので、噴口に至る流体の流路を確実に放射状に形成することができ、上述の効果を得やすくなることを見出した。   The present inventor, when forming a plurality of grooves so that a swirl flow toward the nozzle hole is formed in the nozzle tip, if the groove depth is made deeper toward the joining part of the groove by inclining the groove bottom surface, If the spray pattern spreads and the spray density is small and uniform and the spray is mild, and if the groove formation surface is a plane perpendicular to the central axis of the nozzle, this plane and the housing are formed. It has been found that the fluid flow path leading to the nozzle hole can be surely formed radially, and the above-described effects can be easily obtained.

即ち、本発明は、噴口が開口した噴口チップと噴口チップを装着するハウジングを有し、ハウジング内に流入した流体を噴口から噴射する噴射装置であって、
噴口チップの内壁に、外周より噴口に向う旋回流を形成する複数の溝と、それらの溝が合流して噴口に至る合流部が設けられ、
溝底面が、溝深さが噴口チップの外周部に対して合流部側が深くなるように傾斜し、
溝の形成面が噴口の中心線に対して垂直な平面であり、
ハウジングが、前記溝の形成面に当接するセンターポストを有するとともに前記溝の外周側に連なる流路を有する噴射装置を提供する。 That is, the present invention is an injection device that has a nozzle tip having a nozzle hole and a housing to which the nozzle tip is mounted, and jets fluid that has flowed into the housing from the nozzle hole.
The inner wall of the nozzle tip is provided with a plurality of grooves that form a swirling flow from the outer periphery toward the nozzle hole, and a merging portion that joins the grooves to reach the nozzle hole,
The groove bottom surface is inclined so that the groove depth is deeper on the confluence portion side with respect to the outer periphery of the nozzle tip,
The groove formation surface is a plane perpendicular to the center line of the nozzle hole,
There is provided an injection device in which a housing has a center post that abuts against a groove forming surface and a flow path that continues to the outer peripheral side of the groove.

本発明の噴射装置によれば、複数の溝により噴口チップの噴口に向かう旋回流が形成され、かつ、溝底面が傾斜して溝が合流部側で深くなっているので、流体の旋回流の損失を抑えて噴口から噴射できるため、噴射流体に大きな遠心力を与えることができ、これにより、噴霧パターンが広く、かつ噴射密度が均一で小さく、更に噴霧粒子が小さいマイルドな噴霧を得ることが可能となる。   According to the injection device of the present invention, the swirl flow toward the nozzle hole of the nozzle tip is formed by the plurality of grooves, and the groove bottom surface is inclined and the groove is deepened on the joining portion side. Since it is possible to spray from the nozzle with reduced loss, it is possible to give a large centrifugal force to the jet fluid, thereby obtaining a mild spray with a wide spray pattern, uniform spray density, and small spray particles. It becomes possible.

また、本発明の噴射装置によれば、噴口チップにおける溝の形成面が、噴口の中心線に対して垂直な平面となっているため、この平面に、噴射装置のセンターポストの先端面を容易に密着させることができる。したがって、噴口チップの外周部から噴口に至る流体の流路を確実に放射状に形成することができる。   Further, according to the injection device of the present invention, since the groove forming surface of the nozzle tip is a plane perpendicular to the center line of the nozzle hole, the tip surface of the center post of the injection device can be easily placed on this plane. Can be adhered to. Therefore, the fluid flow path from the outer peripheral portion of the nozzle tip to the nozzle can be surely formed radially.

さらに、噴口チップを備えた既存の噴射装置のハウジングの多くは、先端面が平坦なセンターポストを有するので、本発明の噴射装置は、既存の噴射装置のハウジングを利用して、簡便に低コストに得ることができる。   Furthermore, since many of the existing injection device housings having the nozzle tip have a center post having a flat tip surface, the injection device according to the present invention uses the existing injection device housing to easily and at low cost. Can get to.

図１は、実施例の噴射装置を備えたエアゾール容器の斜視図である。FIG. 1 is a perspective view of an aerosol container provided with an injection device according to an embodiment. 図２Ａは、図１の噴射装置の断面図（Ａ−Ａ図）である。FIG. 2A is a cross-sectional view (AA view) of the injection device of FIG. 1. 図２Ｂは、図２Ａの噴口チップ部分の拡大図である。FIG. 2B is an enlarged view of the nozzle tip portion of FIG. 2A. 図３Ａは、図２Ａの噴射装置の噴口チップの断面図である。3A is a cross-sectional view of the nozzle tip of the injection device of FIG. 2A. 図３Ｂは、図２Ａの噴射装置の噴口チップの背面図（Ａ−Ａ図）である。FIG. 3B is a rear view (AA view) of the nozzle tip of the injection device of FIG. 2A. 図４Ａは、比較例の噴口チップの断面図である。FIG. 4A is a cross-sectional view of a nozzle tip of a comparative example. 図４Ｂは、図４Ａの噴口チップの背面図（Ａ−Ａ図）である。4B is a rear view (AA view) of the nozzle tip of FIG. 4A. 図５Ａは、比較例の噴口チップの断面図である。FIG. 5A is a cross-sectional view of a nozzle tip of a comparative example. 図５Ｂは、図５Ａの噴口チップの背面図（Ａ−Ａ図）である。FIG. 5B is a rear view (AA view) of the nozzle tip of FIG. 5A.

以下、図面を参照しつつ本発明の噴射装置を詳細に説明する。なお、各図中、同一符号は、同一又は同等の構成要素を表している。   Hereinafter, an injection device of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol represents the same or equivalent component.

図１は、本発明の一実施例の噴射装置１０を備えたエアゾール容器１の斜視図であり、図２Ａは、その噴射装置１０の断面図（Ａ−Ａ図）であり、図２Ｂは、その噴口チップ部分の拡大図であって、流体の流れを示した図である。   FIG. 1 is a perspective view of an aerosol container 1 including an injection device 10 according to an embodiment of the present invention, FIG. 2A is a cross-sectional view (AA view) of the injection device 10, and FIG. It is the enlarged view of the nozzle tip part, Comprising: It is the figure which showed the flow of the fluid.

この噴射装置１０は、エアゾール容器１の容器本体２の口部に装着され、容器本体２内に収容されている流体を噴射するものであって、そのハウジング１１には、エアゾール容器１のステム３が挿入されるステム挿入部１２が形成されている。また、ステム挿入部１２の長手方向に対して略垂直に円筒状凹部１３が形成され、その中に円柱状のセンターポスト１４が形成され、センターポスト１４の外周と円筒状凹部１３との間の間隙が流路１５となっている。この流路１５は、ステム挿入部１２に連通している。   The injection device 10 is attached to the mouth of the container main body 2 of the aerosol container 1 and injects the fluid contained in the container main body 2. The housing 11 has a stem 3 of the aerosol container 1. A stem insertion portion 12 into which is inserted is formed. Further, a cylindrical recess 13 is formed substantially perpendicular to the longitudinal direction of the stem insertion portion 12, a columnar center post 14 is formed therein, and the space between the outer periphery of the center post 14 and the cylindrical recess 13 is formed. The gap is a flow path 15. The flow path 15 communicates with the stem insertion portion 12.

センターポスト１４の先端部には噴口チップ２０が装着されている。噴口チップ２０は、概略有底筒状で底部に噴口２２が開口している。図３Ａ及び図３Ｂに示すように、この噴口チップ２０の内壁には、その外周部２１から噴口２２に向かう旋回流を形成する複数の溝２３が形成され、さらにそれらの溝２３が噴口２２の手前で合流する合流部２４が形成されている。なお、符号２５は、噴口チップ２０の側面内壁に突出するように形成された突起であって、突起２５はセンターポスト１４に当接して、噴口チップ２０を位置決めし、固定する。   A nozzle tip 20 is attached to the tip of the center post 14. The nozzle tip 20 has a substantially bottomed cylindrical shape, and a nozzle hole 22 is opened at the bottom. As shown in FIGS. 3A and 3B, the inner wall of the nozzle tip 20 is formed with a plurality of grooves 23 that form a swirling flow from the outer peripheral portion 21 toward the nozzle hole 22. A merge portion 24 that merges in front is formed. Reference numeral 25 denotes a protrusion formed so as to protrude from the inner wall of the side surface of the nozzle tip 20, and the protrusion 25 contacts the center post 14 to position and fix the nozzle tip 20.

ここで、複数の溝２３は略放射状に形成されているが、各溝２３は、噴口２２から噴射される流体が旋回流となるように、溝幅の中心線Ｌａが噴口２２の中心からずれるように形成されている。なお、複数の溝２３の平面形状としては、噴口２２から流体が旋回流として射出されるように、少なくとも合流部２４近傍では、溝幅の中心線Ｌａが噴口２２の中心からずれるように形成されていればよく、その余の領域では、例えば、複数の溝が渦巻きに形成されていてもよい。また、溝２３の個数としては、好ましくは２〜６個、より好ましくは３〜４個である。   Here, the plurality of grooves 23 are formed in a substantially radial shape. In each groove 23, the groove width center line La is shifted from the center of the nozzle hole 22 so that the fluid jetted from the nozzle hole 22 becomes a swirl flow. It is formed as follows. The planar shape of the plurality of grooves 23 is formed such that the center line La of the groove width is deviated from the center of the nozzle 22 at least in the vicinity of the junction 24 so that the fluid is ejected from the nozzle 22 as a swirling flow. In other regions, for example, a plurality of grooves may be formed in a spiral. The number of grooves 23 is preferably 2-6, more preferably 3-4.

本発明においては、溝２３が流体が送り込まれる流路１５のある噴口チップ２０の外周部２１に対して合流部２４側で深くなるように溝底面２３ｂが傾斜し、かつ溝２３の形成領域における溝２３の形成面（即ち、溝２３の上縁の包絡面）が、噴口２２の中心線Ｌｂに対して垂直な平面とすることを特徴としている。このため、本実施例では、図３Ａに示すように、噴口チップ２０における噴口２２の形成壁を平板状とすることにより溝２３の上縁２３ａは噴口２２の中心線Ｌｂに対して垂直となるようにし、かつ溝の底面２３ｂには傾きを持たせ、噴口２２側で溝２３を深くしている。このように、溝の底面２３ｂに傾きをもたせ、溝２３の深さを噴口チップ２０の外周部２１に対して合流部２４側で深くすると、図２Ｂに示すように、センターポスト１４の外側の流路１５を通って噴口チップ２０の外周部２１に達した流体が、さらに溝２３に沿って旋回して流れ、噴口２２から拡散噴射される場合に、流体の旋回流の損失を抑えて噴口２２から噴射できるため、噴射流体に大きな遠心力を与えることができるので、噴口２２から噴射する流体の噴霧パターンを広げ、かつ噴射密度を均一で小さくし、噴霧粒子を微細化させてマイルドな噴霧を得ることが可能となる。また、溝２３の形成領域における溝２３の形成面を噴口２２の中心線Ｌｂに対して垂直とすることにより、溝２３の形成面とセンターポスト１４の先端面との密着性が向上するので、溝２３により、確実に放射状の流路を形成することができる。さらに、既存の噴射装置のハウジングの多くは、先端面が、噴口の中心線Ｌｂに対して垂直に形成されているので、既存の噴射装置のハウジングを用いて本発明の噴射装置を低コストに得ることが可能となる。   In the present invention, the groove bottom surface 23b is inclined so that the groove 23 becomes deeper on the side of the merging portion 24 with respect to the outer peripheral portion 21 of the nozzle tip 20 having the flow path 15 into which the fluid is fed, and in the region where the groove 23 is formed. The formation surface of the groove 23 (that is, the envelope surface of the upper edge of the groove 23) is a plane perpendicular to the center line Lb of the nozzle hole 22. For this reason, in this embodiment, as shown in FIG. 3A, the upper edge 23 a of the groove 23 is perpendicular to the center line Lb of the nozzle hole 22 by forming the forming wall of the nozzle hole 22 in the nozzle tip 20 into a flat plate shape. In addition, the bottom surface 23b of the groove is inclined, and the groove 23 is deepened on the nozzle hole 22 side. In this way, when the bottom surface 23b of the groove is inclined and the depth of the groove 23 is increased on the side of the merging portion 24 with respect to the outer peripheral portion 21 of the nozzle tip 20, as shown in FIG. When the fluid that has reached the outer peripheral portion 21 of the nozzle tip 20 through the flow path 15 further swirls along the groove 23 and is diffused and jetted from the nozzle 22, the loss of the swirling flow of the fluid is suppressed and the nozzle is suppressed. Since the jet fluid can be sprayed from the nozzle 22, a large centrifugal force can be applied to the jet fluid. Therefore, the spray pattern of the fluid sprayed from the nozzle 22 is widened, the spray density is made uniform and small, and the spray particles are refined to produce a mild spray. Can be obtained. Further, by making the formation surface of the groove 23 in the formation region of the groove 23 perpendicular to the center line Lb of the nozzle hole 22, the adhesion between the formation surface of the groove 23 and the tip surface of the center post 14 is improved. The grooves 23 can surely form a radial flow path. Furthermore, since many of the existing injection device housings have a tip end surface formed perpendicular to the center line Lb of the injection hole, the injection device of the present invention can be manufactured at low cost using the existing injection device housing. Can be obtained.

溝２３の深さを合流部２４側で深くするにあたり、溝２３を噴口チップ２０の外周から合流部２４にかけて直線的に深くしてもよいが、噴口チップ２０の外周からセンターポスト１４の当接領域あたりまでは一定とし、センターポスト１４の当接領域あたりから溝の底面２３ｂに傾きをもたせてもよい。   In order to increase the depth of the groove 23 on the side of the merging portion 24, the groove 23 may be linearly deepened from the outer periphery of the nozzle tip 20 to the merging portion 24. It may be constant up to the region, and the bottom surface 23b of the groove may be inclined from the contact region of the center post 14.

また、溝２３の深さを合流部２４側で深くする態様としては、溝の底面２３ｂを階段状に形成することも考えられるが、溝の底面２３ｂを階段状にすると、その段に付着物が溜まり、吐出不良が生じる場合があるので、溝の底面２３ｂを傾斜させることが好ましい。   Further, as an aspect in which the depth of the groove 23 is increased on the side of the merging portion 24, it is conceivable that the bottom surface 23b of the groove is formed in a stepped shape. Therefore, it is preferable to incline the bottom surface 23b of the groove.

溝２３を合流部２４側で深くする程度は、噴口チップ２０、合流部２４、噴口２２のそれぞれの径にもよるが、例えば、噴口チップ２０の内径Ｌ１が２．０〜８．０ｍｍ、合流部２４の直径Ｌ２が０．２〜４．０ｍｍ、噴口２２の直径Ｌ３が０．２〜１．５ｍｍの場合に、溝２３の最も浅い部分の深さＬ４を０．１〜１．０ｍｍとし、溝２３の最も深い部分の深さＬ５を０．２〜１．５ｍｍとすることが好ましい。また底面２３ｂの傾斜角度θは５°〜４５°が好ましい。   The degree to which the groove 23 is deepened on the merging portion 24 side depends on the diameters of the nozzle tip 20, the merging portion 24, and the nozzle 22 but, for example, the inner diameter L1 of the nozzle tip 20 is 2.0 to 8.0 mm. When the diameter L2 of the portion 24 is 0.2 to 4.0 mm and the diameter L3 of the nozzle 22 is 0.2 to 1.5 mm, the depth L4 of the shallowest portion of the groove 23 is 0.1 to 1.0 mm. The depth L5 of the deepest portion of the groove 23 is preferably 0.2 to 1.5 mm. The inclination angle θ of the bottom surface 23b is preferably 5 ° to 45 °.

なお、溝の合流部２４の深さは、図３Ａに示したように、噴口２２に向かって深くなるようにしてもよく、一定としてもよいが、流体の圧力損失を小さくする点から、噴口２２に向かって深くし、合流部２４を、噴口２２を頂部とする円錐台形状とすることが好ましい。   As shown in FIG. 3A, the depth of the confluence portion 24 of the groove may be deeper toward the injection port 22 or may be constant, but from the point of reducing the pressure loss of the fluid, It is preferable to make it deep toward 22 and to make the confluence | merging part 24 into the truncated cone shape which makes the nozzle hole 22 a top part.

一方、溝２３の流路断面積は噴口チップ２０外周部２１から合流部２４に向かって同一あるいは、小さくすることが好ましいので、溝２３の幅を、噴口チップ２０の外周部２１から合流部２４に向かって狭くすることが好ましい。これにより、上述のように溝２３を合流部２４側で深くしても、流体の線流速の低下を防止でき、噴霧パターンをより広くすることができる。   On the other hand, since the cross-sectional area of the channel of the groove 23 is preferably the same or smaller from the outer peripheral portion 21 of the nozzle tip 20 toward the merging portion 24, the width of the groove 23 is changed from the outer peripheral portion 21 of the nozzle tip 20 to the merging portion 24. It is preferable to narrow toward. Thereby, even if the groove | channel 23 is deepened by the merge part 24 side as mentioned above, the fall of the linear flow velocity of a fluid can be prevented and a spray pattern can be made wider.

本発明の噴射装置１０は、容器本体２の口部にハウジング１１を装着させるためのハウジング１１の構成を常法により適宜変更することにより、エアゾール容器、ポンプ容器、トリガー容器等の液体吐出容器の口部に取り付けることが可能となる。   The injection device 10 according to the present invention changes the configuration of the housing 11 for attaching the housing 11 to the mouth portion of the container body 2 as appropriate by a conventional method, so that a liquid discharge container such as an aerosol container, a pump container, or a trigger container can be used. It can be attached to the mouth.

本発明の噴射装置１０においては、噴口チップ２０がセンターポスト１４と当接する面に溝２３を形成するのに加えて、センターポスト１４に溝加工しても良い。   In the injection device 10 of the present invention, the center post 14 may be grooved in addition to forming the groove 23 on the surface where the nozzle tip 20 contacts the center post 14.

以下、実験例に基づいて本発明の実施例を具体的に説明する。   Examples of the present invention will be specifically described below based on experimental examples.

実施例１
図３Ａ及び図３Ｂに示したように４本の溝２３が略放射状に形状され、各溝の深さが合流部２４に向かって深くなるように溝底面２３ｂが傾斜し、溝幅が合流部２４に向かって狭くなるように変化している噴口チップ２０であって、噴口２２の直径Ｌ３、ランド長Ｌ６、溝幅（最大Ｌ７／最小Ｌ８）、溝深さ（最小Ｌ４／最大Ｌ５）が表１に示すものを製造し、この噴口チップ２０を用いて、図２Ａの構造の噴射装置１０を製造した。 Example 1
As shown in FIGS. 3A and 3B, the four grooves 23 are formed in a substantially radial shape, the groove bottom surface 23b is inclined so that the depth of each groove becomes deeper toward the merge portion 24, and the groove width is the merge portion. The nozzle tip 20 changes so as to narrow toward 24, and the diameter L3, land length L6, groove width (maximum L7 / minimum L8) and groove depth (minimum L4 / maximum L5) of the nozzle 22 are reduced. What was shown in Table 1 was manufactured, and the injection apparatus 10 of the structure of FIG.

比較例１
図４Ａ及び図４Ｂに示すように、噴口チップ２０Ｘとして、４本の溝２３が略放射状に形成されているが、溝底面が傾斜しておらず、溝深さが噴口チップ２０Ｘの外周部２１から合流部２４まで一定であり、溝幅が合流部２４に向かって狭くなるように変化している噴口チップであって、表１の寸法を有するものを製造し、この噴口チップを用いて実施例１と同様に噴射装置を製造した。 Comparative Example 1
As shown in FIGS. 4A and 4B, four grooves 23 are formed substantially radially as the nozzle tip 20X, but the groove bottom surface is not inclined and the groove depth is the outer peripheral portion 21 of the nozzle tip 20X. A nozzle tip having a constant width from the junction portion 24 to the junction portion 24 and changing so that the groove width becomes narrower toward the junction portion 24 and having the dimensions shown in Table 1 is manufactured and implemented using the nozzle tip. An injector was manufactured as in Example 1.

比較例２
図５Ａ及び図５Ｂに示すように、噴口チップ２０Ｙとして、４本の溝２３が略放射状に形成されているが、溝底面が傾斜しておらず、溝深さが噴口チップ２０Ｙの外周部２１から合流部２４まで一定であり、溝幅も一定であり、表１の寸法を有するものを製造し、この噴口チップを用いて実施例１と同様に噴射装置を製造した。 Comparative Example 2
As shown in FIGS. 5A and 5B, four grooves 23 are formed substantially radially as the nozzle tip 20Y, but the groove bottom surface is not inclined and the groove depth is the outer peripheral portion 21 of the nozzle tip 20Y. To the joining portion 24, the groove width is also constant, and those having the dimensions shown in Table 1 were manufactured, and an injection device was manufactured in the same manner as in Example 1 using this nozzle tip.

評価
実施例１、比較例１及び比較例２の各噴射装置を、それぞれエアゾール容器（内容液：原液／ガス（重量比）：45／55、ガス比（重量比）：LPG(0.2MPa)／DME=30／70、原液：ヘアスプレー剤、粘度10ｍPa・ｓ（20℃）、ガス圧：0.35Mpa（20℃））の口部に取り付け、（ａ）スプレーパターン、（ｂ）噴射量、（ｃ）粒子径、（ｄ）噴射密度を次のように測定した。これらの結果を表１に示す。 Evaluation Each of the injection devices of Example 1, Comparative Example 1 and Comparative Example 2 were each an aerosol container (content liquid: stock solution / gas (weight ratio): 45/55, gas ratio (weight ratio): LPG (0.2 MPa) / DME = 30/70, stock solution: hair spray, viscosity 10mPa · s (20 ° C), gas pressure: 0.35Mpa (20 ° C)), (a) spray pattern, (b) spraying amount, ( c) Particle diameter and (d) injection density were measured as follows. These results are shown in Table 1.

（ａ）スプレーパターン（縦ｍｍ×横ｍｍ）
噴口から１５０ｍｍの距離に平板を置き、１秒間噴射させた場合に平板に形成されたスプレーパターンの縦、横の長さ（ｍｍ）を測定した。
（ｂ）噴射量（ｇ／１０ｓ）
１０秒間噴射させた場合の噴射液量（ｇ）を測定した。
（ｃ）粒子径（μｍ）
Partikel-technik社のレーザー回折式粒子径分布測定装置により測定した。
（ｄ）噴射密度（ｇ／ｃｍ2）
噴口から１５０ｍｍの距離に平板を置き、１秒間噴射させた場合の噴射量（ｇ）を直径１５０ｍｍの円の面積で割ることにより求めた。 (A) Spray pattern (length mm x width mm)
When a flat plate was placed at a distance of 150 mm from the nozzle and sprayed for 1 second, the vertical and horizontal lengths (mm) of the spray pattern formed on the flat plate were measured.
(B) Injection amount (g / 10s)
The amount of spray liquid (g) when sprayed for 10 seconds was measured.
(C) Particle size (μm)
Measurement was performed with a laser diffraction particle size distribution measuring apparatus manufactured by Partikel-technik.
(D) Injection density (g / cm 2 )
This was determined by placing a flat plate at a distance of 150 mm from the nozzle and dividing the injection amount (g) when sprayed for 1 second by the area of a circle with a diameter of 150 mm.

Figure 2011147920
Figure 2011147920

表１の結果から、実施例１の噴射装置は比較例１、２の噴射装置に比してスプレーパターンが広いこと、また、噴射量が維持され、粒子径も小さな状態を維持したままで噴射密度が小さく、マイルドな噴霧を形成していることがわかる。   From the results shown in Table 1, the injection device of Example 1 has a wider spray pattern than the injection devices of Comparative Examples 1 and 2, and the injection amount is maintained and the particle diameter is kept small. It can be seen that the density is small and a mild spray is formed.

本発明の噴射装置は、化粧用スプレー、ヘアケアスプレー、衣料用スプレー、洗浄剤スプレーなど種々のスプレー容器の噴射装置として有用である。   The spray device of the present invention is useful as a spray device for various spray containers such as cosmetic sprays, hair care sprays, clothing sprays, and detergent sprays.

１ エアゾール容器
２ 容器本体
３ ステム
１０ 噴射装置
１１ ハウジング
１２ ステム挿入部
１３ 円筒状凹部
１４ センターポスト
１５ 流路
２０、２０Ｘ、２０Ｙ 噴口チップ
２１ 噴口チップの外周部
２２ 噴口
２３ 溝
２３ａ 溝の上縁
２３ｂ 溝の底面
２４ 合流部
２５ 突起
Ｌａ 溝の中心線
Ｌｂ 噴口の中心線
Ｌ１ 噴口チップの内径
Ｌ２ 合流部の直径
Ｌ３ 噴口の直径
Ｌ４ 溝の最も浅い部分の深さ
Ｌ５ 溝の最も深い部分の深さ
Ｌ６ ランド長 DESCRIPTION OF SYMBOLS 1 Aerosol container 2 Container body 3 Stem 10 Injection apparatus 11 Housing 12 Stem insertion part 13 Cylindrical recessed part 14 Center post 15 Flow path 20, 20X, 20Y Injection nozzle tip 21 Outer peripheral part of injection nozzle 22 Injection nozzle 23 Groove 23a Groove upper edge 23b Bottom surface of groove 24 Junction part 25 Projection La Groove center line Lb Center line of nozzle L1 Inner diameter of nozzle tip L2 Diameter of junction part L3 Diameter of nozzle L4 Depth of shallowest part of groove L5 Depth of deepest part of groove L6 Land Chief

Claims (4)

噴口が開口した噴口チップと噴口チップを装着するハウジングを有し、ハウジング内に流入した流体を噴口から噴射する噴射装置であって、
噴口チップの内壁に、外周より噴口に向う旋回流を形成する複数の溝と、それらの溝が合流して噴口に至る合流部が設けられ、
溝底面が、溝深さが噴口チップの外周部に対して合流部側が深くなるように傾斜し、
溝の形成面が噴口の中心線に対して垂直な平面であり、
ハウジングが、前記溝の形成面に当接するセンターポストを有するとともに前記溝の外周側に連なる流路を有する噴射装置。 An injection device for injecting a fluid that has flowed into the housing from the nozzle hole, having a nozzle tip having a nozzle hole and a housing for mounting the nozzle tip.
The inner wall of the nozzle tip is provided with a plurality of grooves that form a swirling flow from the outer periphery toward the nozzle hole, and a merging portion that joins the grooves to reach the nozzle hole,
The groove bottom surface is inclined so that the groove depth is deeper on the confluence portion side with respect to the outer periphery of the nozzle tip,
The groove formation surface is a plane perpendicular to the center line of the nozzle hole,
An injection device, wherein the housing has a center post that abuts against a surface on which the groove is formed and has a flow path that continues to the outer peripheral side of the groove. 合流部近傍において溝幅の中心線が噴口の中心からずれている請求項１記載の噴射装置。   The injection device according to claim 1, wherein the center line of the groove width is deviated from the center of the injection hole in the vicinity of the junction. 溝幅が噴口チップの外周部から合流部に向かって狭くなっている請求項１又は２記載の噴射装置。   The injection device according to claim 1 or 2, wherein the groove width becomes narrower from the outer peripheral portion of the nozzle tip toward the merging portion. 合流部が、噴口を頂部とする円錐台形状である請求項１〜３のいずれかに記載の噴射装置。   The injection device according to any one of claims 1 to 3, wherein the joining portion has a truncated cone shape having the nozzle hole as a top.
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