JP6667864B1 - Ventilated waterproof structure - Google Patents

Ventilated waterproof structure Download PDF

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JP6667864B1
JP6667864B1 JP2019205315A JP2019205315A JP6667864B1 JP 6667864 B1 JP6667864 B1 JP 6667864B1 JP 2019205315 A JP2019205315 A JP 2019205315A JP 2019205315 A JP2019205315 A JP 2019205315A JP 6667864 B1 JP6667864 B1 JP 6667864B1
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plug
hole
outer end
filter
waterproof structure
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JP2021077820A (en
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英美 川田
英美 川田
嘉博 小松
嘉博 小松
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TOWA KAGAKU CO.,LTD
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TOWA KAGAKU CO.,LTD
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Priority to PCT/JP2020/038898 priority patent/WO2021095432A1/en
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  • Filtering Of Dispersed Particles In Gases (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

【課題】コンパクトで、構造が簡素であり、筐体の通気孔への取付作業を能率的に行い得る通気防水構造体を提供する。【解決手段】栓体１を加硫成形にて成形すると共に、呼吸フィルタ10を栓体１の外端面４に対し、加硫成形と同時に、一体積層状として、固着する。【選択図】図２PROBLEM TO BE SOLVED: To provide a ventilation waterproof structure which is compact, has a simple structure, and can be efficiently attached to a ventilation hole of a housing. SOLUTION: The plug 1 is molded by vulcanization molding, and a breathing filter 10 is fixed to an outer end surface 4 of the plug 1 at the same time as vulcanization molding as an integral laminated state. [Selection diagram] FIG.

Description

本発明は、通気防水構造体に関する。   The present invention relates to a ventilation waterproof structure.

従来、筐体の密閉状空間と外部とを連通する通気孔に設けられる通気防水構造体として、図17に示すような構造のものが公知である（特許文献１参照）。
即ち、図17に示すように、筐体31の密閉状空間Ｅと、外部（大気）Ｙとを連通する通気孔32に、挿入して嵌着される栓体33と、この栓体33の外端面に、接着剤にて接着された呼吸フィルタ35を、備えている。栓体33は貫孔41を有する筒状である。さらに、被覆カバー36が、栓体33の外鍔部33Ａに外嵌状に取着される。 2. Description of the Related Art Conventionally, a structure as shown in FIG. 17 is known as a ventilated waterproof structure provided in a vent that communicates a closed space of a housing with the outside (see Patent Document 1).
That is, as shown in FIG. 17, a plug 33 which is inserted and fitted into a ventilation hole 32 which communicates the sealed space E of the housing 31 with the outside (atmosphere) Y, A respiratory filter 35 adhered to the outer end surface with an adhesive is provided. The plug 33 has a cylindrical shape having a through hole 41. Further, the cover 36 is externally fitted to the outer flange 33A of the plug 33.

通気孔32は、筐体壁部31Ａの内面から密閉状空間Ｅへ突出状の短円筒部37をもって、形成されている。
栓体33の下端（内端）の小外鍔部33Ｂが、短円筒部37の内端面に係止状として、栓体33は通気孔32に固着されるのであるが、密封用Ｏリング38が、外鍔部33Ａの下面と筐体壁部31Ａ間に介装されている。 The ventilation hole 32 is formed with a short cylindrical portion 37 protruding from the inner surface of the housing wall 31A to the closed space E.
The small outer flange 33B at the lower end (inner end) of the plug 33 is engaged with the inner end surface of the short cylindrical portion 37, and the plug 33 is fixed to the ventilation hole 32. Is interposed between the lower surface of the outer flange 33A and the housing wall 31A.

また、被覆カバー36は、天井壁面部36Ａと、円筒壁部36Ｂと、から成り、横方向の小通気孔39が設けられている。円筒壁部36Ｂの内周面の凹周溝36Ｃに、外鍔部33Ａが、係合することによって、被覆カバー36が栓体33に固着され、しかも、別のＯリング40が、付設されている。
このＯリング40は、円筒壁部36Ｂの外周面と、筐体壁部31Ａの外面との隅部に、Ｏリング40自身の弾発的縮径力をもって、固着し、外気が、被覆カバー36の内部へ浸入するのを防止している。 The covering cover 36 is composed of a ceiling wall portion 36A and a cylindrical wall portion 36B, and has a small lateral ventilation hole 39. The outer cover 33 is fixed to the plug 33 by engaging the outer flange 33A with the concave groove 36C on the inner peripheral surface of the cylindrical wall 36B, and another O-ring 40 is additionally provided. I have.
The O-ring 40 is fixed to the corner between the outer peripheral surface of the cylindrical wall portion 36B and the outer surface of the housing wall portion 31A with the elastic resizing force of the O-ring 40 itself. To prevent infiltration inside

図18は他の従来例を示し、前述の被覆カバー36を有さない構造のものである。
この図18に示すように、軸心に沿って貫孔41を有する短寸ボルト形状のプラスチック製栓体42を有し、筐体壁部31Ａにはネジ孔43を貫設し、栓体42の雄ネジ部44を螺着して、筐体31に固着する構造である。呼吸フィルタ35は、栓体42の頭部42Ａの上面に、接着剤にて接着される。
また、密封用のＯリング38が筐体31の筐体壁部31Ａの外面と、栓体42の頭部42Ａの下面との間に、介装されている。 FIG. 18 shows another conventional example, which has a structure without the above-mentioned cover 36.
As shown in FIG. 18, a short bolt-shaped plastic plug 42 having a through hole 41 along the axis is provided, and a screw hole 43 is provided through the housing wall 31A. The male screw portion 44 is screwed and fixed to the housing 31. The breathing filter 35 is adhered to the upper surface of the head 42A of the plug 42 with an adhesive.
An O-ring 38 for sealing is interposed between the outer surface of the housing wall 31A of the housing 31 and the lower surface of the head 42A of the plug 42.

特開２０１４−１２３６２５号公報JP 2014-123625 A

上述の図17に示した従来の通気防水構造は、次のような問題点があった。即ち、（ｉ）部品点数が多い点、（ii）筐体31に取付ける際に、多くの部品の一部を紛失する虞れがある点、 （iii）筐体31への取付作業に時間が掛かっていた点、（iv）筐体31の外部への突出部位が大きく、コンパクト化も困難である点等の問題点があった。   The conventional ventilated waterproof structure shown in FIG. 17 has the following problems. That is, (i) a large number of parts, (ii) a part of many parts may be lost at the time of mounting to the housing 31, and (iii) a time required for the mounting work to the housing 31. There were problems such as the hanging, and (iv) the projecting portion of the housing 31 to the outside was large, and it was difficult to make it compact.

また、図18に示した他の従来例では、（ｉ）ネジ孔43へ雄ネジ部44を螺合するのに手間が掛かる点、（ii）密封のためのＯリング38が正規の位置に在って適切に弾性圧縮しているか否か、取付作業において注意を払わなければならず、熟練を要した点、 （iii）頭部42Ａが大きく、外部へ突出している点等の問題点があった。   Further, in another conventional example shown in FIG. 18, (i) it takes time and effort to screw the male screw portion 44 into the screw hole 43, and (ii) the O-ring 38 for sealing is in a proper position. Attention must be paid to the installation work to determine whether or not the elastic compression is appropriate, and it requires skill, and (iii) the head 42A is large and protrudes outside. there were.

そこで、本発明は、従来のこのような問題を解決して、分離した小部品を無くして、紛失を防ぎ、取付作業が簡単で取付作業の能率をアップでき、しかも、コンパクトであって、外部への突出部位（の容積）が減少乃至全く無くすことができる通気防水構造体を提供することを目的とする。   Therefore, the present invention solves such a conventional problem, eliminates separated small parts, prevents loss, facilitates installation work, improves the efficiency of installation work, and is compact, It is an object of the present invention to provide a ventilated waterproof structure capable of reducing (or completely eliminating) a protruding portion (volume).

そこで、本発明は、密閉状空間と外部とを連通する通気孔に嵌着される貫孔付の栓体と、該栓体のアキシャル方向外端面に固着されて上記貫孔を閉鎖する通気性と防水性を有する呼吸フィルタとを、備えた通気防水構造に於て；上記栓体は、生ゴム材料の加熱加圧による加硫成形にて成形され；上記呼吸フィルタは、上記栓体の上記加硫成形にて、上記アキシャル方向外端面に、一体積層状として固着されている。
また、上記呼吸フィルタを所定間隔をもって被覆する天井壁面部と、該天井壁面部から突設されると共に外部に連通する副通気孔を有する筒状脚部とを、備えた被覆カバーを、付設し；しかも、上記被覆カバーの上記筒状脚部は、上記栓体の上記加硫成形にて、上記アキシャル方向外端面に一体状に埋設されている。
また、シール材を使用せず、上記栓体を形成する加硫ゴム自身の弾発付勢力によって、栓体と上記通気孔との嵌合部の密封性を保つように構成した。 In view of the above, the present invention provides a plug having a through-hole which is fitted into a vent which communicates a closed space with the outside, and a ventilating member which is fixed to an axially outer end face of the plug and closes the through-hole. And a breathable filter having a waterproof property; the plug is formed by vulcanization of raw rubber material by heating and pressing; and the breathing filter is formed by the vulcanization of the plug. It is fixed to the outer end face in the axial direction as an integral laminate by sulfuric molding.
Further, a covering cover having a ceiling wall portion that covers the respiratory filter at a predetermined interval, and a cylindrical leg portion having a sub-ventilating hole protruding from the ceiling wall portion and communicating with the outside is provided. Moreover, the cylindrical leg of the cover is integrally embedded in the axially outer end face by the vulcanization of the plug.
Further, the sealing property of the fitting portion between the plug and the vent hole is maintained by the elastic urging force of the vulcanized rubber itself forming the plug without using a sealing material.

本発明によれば、部品点数を著しく減少できる。従って、小さな部品の紛失が防止可能となる。さらに、取付作業の能率向上を図り得る。筐体の外面からの突出を無くし、又は、突出寸法を減少できる。即ち、筐体等のコンパクト化に貢献できる。 According to the present onset Akira, it can significantly decrease the number of parts. Therefore, loss of small parts can be prevented. Further, the efficiency of the mounting operation can be improved. The protrusion from the outer surface of the housing can be eliminated or the protrusion size can be reduced. That is, it is possible to contribute to downsizing of the housing and the like.

さらに、呼吸フィルタの固着強度は大きく、栓体から剥離する事故を防止できる。また、Ｏリング等のシール材を省略できるにかかわらず、通気孔内面に対する密封性が良好に維持でき、かつ、不意の栓体の離脱を防止できる。
呼吸フィルタの固着強度が高く、密閉状空間（内部）と外部との圧力差が大きくても、呼吸フィルタの剥離が発生しない。さらに、栓体と被覆カバーを一体として同時に取着でき、迅速かつ容易な取着作業を実現している。 Furthermore, the fixing strength of the respiratory filter is large, and it is possible to prevent an accidental peeling from the plug. Also, despite the fact that the sealing material such as the O-ring can be omitted, the sealing performance with respect to the inner surface of the ventilation hole can be maintained well, and the accidental detachment of the plug can be prevented.
Even if the respiration filter has a high fixing strength and the pressure difference between the closed space (inside) and the outside is large, the respiration filter does not peel off. Further, the plug and the cover can be integrally attached at the same time, thereby realizing a quick and easy attaching work.

本発明の第１の参考例を示し、（Ａ）は縦断面図、（Ｂ）は拡大要部断面図である。1A and 1B show a first reference example of the present invention, in which FIG. 1A is a longitudinal sectional view, and FIG. 本発明の第２の参考例を示し、（Ａ）は単品の縦断面図、（Ｂ）は使用状態を示す断面図である。FIG. 7 shows a second reference example of the present invention, in which (A) is a longitudinal sectional view of a single product, and (B) is a sectional view showing a use state. 本発明の第３の参考例を示し、（Ａ）は単品の縦断面図、（Ｂ）は使用状態を示す断面図である。FIG. 7 shows a third reference example of the present invention, in which (A) is a longitudinal sectional view of a single product, and (B) is a sectional view showing a use state. 本発明の第４の参考例を示す縦断面図である。It is a longitudinal section showing the 4th example of the present invention. 本発明の第５の参考例を示す縦断面図である。It is a longitudinal section showing the 5th example of the present invention. 本発明の第６の参考例を示し、（Ａ）は単品の縦断面図、（Ｂ）は使用状態を示す縦断面図である。FIG. 13 shows a sixth reference example of the present invention, in which (A) is a longitudinal sectional view of a single product, and (B) is a longitudinal sectional view showing a use state. 本発明の第７の参考例を示し、（Ａ）は単品の縦断面図、（Ｂ）は使用状態を示す縦断面図である。FIG. 13 shows a seventh reference example of the present invention, in which (A) is a longitudinal sectional view of a single product, and (B) is a longitudinal sectional view showing a use state. 本発明の第１の実施形態を示す縦断面図である。It is a longitudinal section showing a 1st embodiment of the present invention. 第１の実施形態の使用状態断面図である。FIG. 3 is a sectional view illustrating a use state of the first embodiment. 第２の実施形態を示す縦断面図である。It is a longitudinal section showing a 2nd embodiment. 第２の実施形態の使用状態断面図である。FIG. 10 is a sectional view illustrating a use state of the second embodiment. 本発明に係る通気防水構造体の製造方法を説明する要部断面説明図である。It is principal part sectional explanatory drawing explaining the manufacturing method of the ventilation waterproof structure which concerns on this invention. 本発明に係る通気防水構造体の製造方法を説明する要部断面説明図である。It is principal part sectional explanatory drawing explaining the manufacturing method of the ventilation waterproof structure which concerns on this invention. 本発明に係る通気防水構造体の製造方法を説明する要部断面説明図である。It is principal part sectional explanatory drawing explaining the manufacturing method of the ventilation waterproof structure which concerns on this invention. 本発明に係る通気防水構造体の製造方法を説明する要部断面説明図である。It is principal part sectional explanatory drawing explaining the manufacturing method of the ventilation waterproof structure which concerns on this invention. 本発明に係る通気防水構造体の製造方法を説明する要部断面説明図である。It is principal part sectional explanatory drawing explaining the manufacturing method of the ventilation waterproof structure which concerns on this invention. 従来例を示す使用状態断面図である。FIG. 10 is a sectional view illustrating a conventional example in use. 他の従来例を示す使用状態断面図である。FIG. 11 is a sectional view showing a state of use showing another conventional example.

以下、図示の実施の形態に基づき本発明を詳説する。
図１，図２（Ａ），図３（Ａ）に於て、本発明と特に関連性のある第１・第２・第３の各参考例を示し、いずれも、一軸心Ｌ1 に沿った貫孔２を有する栓体１を備え、この栓体１のアキシャル方向外端面４に固着され、上記貫孔２を閉鎖する呼吸フィルタ10とを、備えている。
さらに、栓体１は、外周面１Ａに、大き目の断面三角状突条部３（図１参照）、あるいは、小さ目の断面三角状突条部３（図２（Ａ）参照）、又は、断面丸山型の突条部３（図３（Ａ）参照）が、形成されている。 Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
1, At a FIG. 2 (A), the FIG. 3 (A), the present invention particularly shows each reference example of the first, second and third that are related, even Re not have, shaft center L It has a plug 1 having a through hole 2 along 1 and a respiratory filter 10 fixed to the axially outer end face 4 of the plug 1 and closing the through hole 2.
Further, the plug 1 has a larger cross-sectional triangular ridge 3 (see FIG. 1) or a smaller cross-sectional triangular ridge 3 (see FIG. 2 (A)) or a cross-section on the outer peripheral surface 1A. A round ridge 3 (see FIG. 3A) is formed.

図２（Ｂ），図３（Ｂ）に示した使用（装着）状態に於て、筐体８等の（内部の）密閉状空間Ｅと、外部（大気）Ｙとを連通する（円形断面の）通気孔５に、栓体１が嵌着される。
この栓体１は、（生ゴム材料を加熱加圧による）加硫成形によって、成形される。つまり、栓体１は、弾性に富んだ加硫ゴムから成り、例えば、シリコンゴムが用いられる。 In the use (wearing) state shown in FIGS. 2B and 3B, the (internal) sealed space E such as the casing 8 communicates with the outside (atmosphere) Y (circular cross section). The plug 1 is fitted into the vent hole 5).
The plug 1 is formed by vulcanization (a raw rubber material is heated and pressed). That is, the plug 1 is made of vulcanized rubber having high elasticity, and for example, silicon rubber is used.

このような生ゴム材料を加熱加圧による加硫成形によって、栓体１が成形されると同時に、前記呼吸フィルタ10が栓体１のアキシャル方向外端面４に一体積層状として、固着されている（図１（Ｂ）に示した拡大要部断面図参照）。   The plug 1 is formed by vulcanizing such a raw rubber material by heating and pressing, and at the same time, the respiratory filter 10 is fixed to the axially outer end face 4 of the plug 1 as an integral laminate. FIG. 1B is an enlarged cross-sectional view of a relevant part).

ここで、呼吸フィルタ10について説明すれば、例えば、ＰＴＦＥ多孔質膜状体から成り、１平方センチメートル当りに数億個とも言われる多数の微細孔が、図１（Ｂ）に示したように、多数の超微細繊維Ｆにて形成されている。従って、（外部からの）雨、水の浸入を防ぐ防水性、及び空気（及び熱）を通す通気性に優れた薄い膜状体である。（住友電工ファインポリマー株式会社の「ポアフロン」、日東電工株式会社の「テミッシュ」、中興化成工業株式会社の「シポラス」等を挙げることができる。なお、これらの商品名は登録商標である。）   Here, the respiratory filter 10 will be described. For example, as shown in FIG. 1 (B), a large number of micropores made of a porous PTFE membrane and said to be hundreds of millions per square centimeter are formed. Of ultra-fine fibers F. Therefore, the thin film is excellent in waterproofness for preventing rain (from the outside) and water from entering, and excellent in air permeability for passing air (and heat). (Examples include "Poreflon" of Sumitomo Electric Fine Polymer Co., Ltd., "Temiche" of Nitto Denko Corporation, and "Siporus" of Chukoh Kasei Kogyo Co., Ltd. These product names are registered trademarks.)

図１（Ｂ）に示すように、栓体１と呼吸フィルタ10との境界面Ｍに於て、呼吸フィルタ10の（前述の）多数の超微細繊維Ｆが、（栓体１を構成している）加硫ゴムの内部に浸入しており、呼吸フィルタ10は極めて強固に栓体１と一体化されている。従って、密閉状空間Ｅ内の圧力が上昇して高圧力（例えば、１００ｋＰａ）が貫孔２を介して呼吸フィルタ10に作用したとしても、剥離しない。このように、耐圧性に優れている。   As shown in FIG. 1 (B), at the boundary surface M between the plug 1 and the respiratory filter 10, a large number of the ultrafine fibers F (described above) of the respiratory filter 10 ) Is infiltrated into the vulcanized rubber, and the respiratory filter 10 is very firmly integrated with the plug 1. Therefore, even if the pressure in the sealed space E rises and a high pressure (for example, 100 kPa) acts on the respiratory filter 10 through the through-hole 2, it does not peel off. Thus, it has excellent pressure resistance.

次に、図４に示す第４の参考例では、栓体１の外周面１Ａに、断面が円弧状の凹溝部６，６が形成されている。
また、図５に示す第５の参考例では、栓体１の外周面１Ａを凹凸波形に形成した場合を示す。 Next, in a fourth reference example shown in FIG. 4, concave grooves 6, 6 having an arc-shaped cross section are formed on the outer peripheral surface 1 </ b> A of the plug 1.
In the fifth reference example shown in FIG. 5, a case is shown in which the outer peripheral surface 1A of the plug 1 is formed in an uneven waveform.

本発明と関連の深い第１〜第５のいずれの参考例にあっても、図２（Ｂ），図３（Ｂ）に例示した如く、従来のシール材としてのＯリング38（図17と図18参照）を使用せず、栓体１を形成する加硫ゴム自身の弾発付勢力によって、図２（Ｂ）と図３（Ｂ）に付記したような接触面圧Ｐをもって通気孔５の内周面に圧接し、密封性を保っている。
即ち、Ｏリング38等のシール材を別部品として使用せず、栓体１自身のラジアル外方向への弾発付勢力を利用して、栓体１と通気孔５との嵌合部の密封性を確保する構成とした。 In any of the first to fifth reference examples closely related to the present invention , as illustrated in FIGS. 2B and 3B, an O-ring 38 (FIG. 18), the contact hole pressure P as shown in FIGS. 2 (B) and 3 (B) is applied by the elastic urging force of the vulcanized rubber itself forming the plug 1. The inner peripheral surface is pressed against the inner peripheral surface to maintain the sealing performance.
That is, the sealing portion such as the O-ring 38 is not used as a separate component, and the fitting portion between the plug 1 and the vent hole 5 is sealed by utilizing the elastic biasing force of the plug 1 itself in the radially outward direction. The configuration is to ensure the performance.

次に、本発明と関連のある図６に示す第６の参考例について説明する。図６では、栓体１の縦断面形状が、凹周溝７が上下中間位置に形成され、かつ、この凹周溝７の断面形状は矩形であって、凹周溝７の溝幅寸法Ｗ7 は、筐体壁部８Ａの厚さ寸法Ｔ8 と同一、乃至、僅かに小さく設定する。 Next, a sixth reference example shown in FIG. 6 related to the present invention will be described. In FIG. 6, the longitudinal cross-sectional shape of the plug 1 is such that the concave peripheral groove 7 is formed at an intermediate position in the vertical direction, and the cross-sectional shape of the concave peripheral groove 7 is rectangular, and the groove width dimension W of the concave peripheral groove 7 is 7, same as the thickness dimension T 8 of the housing wall portion 8A, to be slightly smaller.

また、凹周溝７の溝底径Ｄ7 は、通気孔５の内径寸法Ｄ5 よりも僅かに大きく設定する。
上述の寸法設定によって、図６（Ｂ）に示した筐体壁部８Ａの通気孔５への装着（使用）状態で、栓体１と通気孔５との嵌合部の密封性を、Ｏリング等のシール材を用いずに確保でき、しかも、栓体１の通気孔５からの離脱を防止できる。なお、栓体１は下端に、下方縮径状テーパ面12Ａを有する小外鍔部12が連設され、栓体１の通気孔５への挿入が容易であり、かつ、上方への引抜けが阻止できる。 Further, the groove bottom diameter D 7 of concave peripheral groove 7 is slightly set larger than the inner diameter D 5 of the ventilation holes 5.
With the above-described dimensional settings, the sealing performance of the fitting portion between the plug 1 and the ventilation hole 5 is set to O when the housing wall portion 8A is mounted (used) on the ventilation hole 5 shown in FIG. The plug 1 can be secured without using a sealing material such as a ring, and the plug 1 can be prevented from being separated from the vent hole 5. The plug 1 is provided with a small outer flange 12 having a tapered surface 12A having a downwardly reduced diameter at the lower end thereof, so that the plug 1 can be easily inserted into the ventilation hole 5 and pulled out upward. Can be blocked.

また、本発明と関連のある図７に示す第７の参考例では、図６と同一符号は同様の構成である。しかし、この図７では下端（内端）から、軸心Ｌ1 と平行に複数のスリット９が切欠形成されている。
図６でも、内方縮径状のテーパ面12Ａによって、栓体１の通気孔５へ挿入することを容易としているのであるが、図７に示すスリット９を設けることによって、通気孔５への挿入の際に、小外鍔部12が縮径方向に弾性変形し易く、従って、栓体１の通気孔５への挿入を一層容易としている。 In the seventh reference example shown in FIG. 7 related to the present invention, the same reference numerals as those in FIG. 6 have the same configuration. However, from this 7 bottom (inner end), a plurality of slits 9 in parallel to the axis L 1 is cutout formed.
In FIG. 6 as well, it is easy to insert the plug 1 into the vent hole 5 by the tapered surface 12A having an inwardly decreasing diameter. However, by providing the slit 9 shown in FIG. At the time of insertion, the small outer flange portion 12 is easily elastically deformed in the diameter-reducing direction, so that the insertion of the plug 1 into the ventilation hole 5 is further facilitated.

そして、図６（Ｂ）と図７（Ｂ）に於て、従来の図17に示したＯリング等のシール材が全く省略されている。即ち、図１〜図５の場合と同様に、図６，図７の参考例においても、シール材を使わずに、栓体１を構成する加硫ゴム自身の弾発付勢力によって、密封性を保っている。 6 (B) and 7 (B), the sealing material such as the conventional O-ring shown in FIG. 17 is omitted. That is, similarly to the case of FIGS. 1 to 5, also in the reference examples of FIGS. 6 and 7, the sealing property is obtained by the elastic force of the vulcanized rubber itself constituting the plug 1 without using the sealing material. Is kept.

次に、図８，図９に於て、本発明の第１の実施形態を示す。図８は自由状態を示し、図９は装着状態を示す。
栓体１の縦断面形状は、図３と同様のものとした場合を例示したが、図１，図２，図４，図５等とするも自由である。 Next, FIGS. 8 and 9 show a first embodiment of the present invention. FIG. 8 shows a free state, and FIG. 9 shows a mounted state.
Although the vertical cross-sectional shape of the plug 1 is illustrated as the same as that of FIG. 3, it may be any of FIGS. 1, 2, 4, 5, and the like.

第１の実施形態にあっては、栓体１の外端面４に固着された呼吸フィルタ10を、所定間隔Ｈ20をもって被覆する天井壁面部21を有する被覆カバー20が、付設されている。
この被覆カバー20は、上記天井壁面部21から下方（内方）へ突設された筒状脚部22を、一体に有する。しかも、この筒状脚部22の下半部は、栓体１に侵入状態で、固着されている。 In the first embodiment, the breathing filter 10 secured to the outer end face 4 of the plug 1, the coating cover 20 having a ceiling wall portion 21 which covers at a predetermined interval H 20 has been attached.
The covering cover 20 integrally has a cylindrical leg portion 22 protruding downward (inward) from the ceiling wall portion 21. In addition, the lower half of the cylindrical leg 22 is secured to the plug 1 in a state of intrusion.

また、筒状脚部22の周壁には、外部Ｙに連通する小径の副通気孔23が複数個（水平方向に）貫設されている。
そして、上記被覆カバー20の筒状脚部22は、前述の栓体１の加硫成形によって、アキシャル方向外端面４から栓体内部に突入状として、（一体状に）埋設されている。 A plurality of (in the horizontal direction) small-diameter sub-air holes 23 communicating with the outside Y are provided in the peripheral wall of the cylindrical leg portion 22.
The cylindrical leg portion 22 of the covering cover 20 is embedded (integrally) so as to protrude into the inside of the plug from the axially outer end surface 4 by the vulcanization molding of the plug 1 described above.

なお、筒状脚部22には、図８，図９のように栓体内部との連結力をアップするために、三角突条部24を形成したり、貫孔（図示省略）を形成したり、膨出部25（図10参照）を形成することも好ましい。
また、図３で既に述べたように、図８，図９に於ても、Ｏリング等のシール材を全く省略して、栓体１の突条部３，３等の弾性圧縮によって、栓体１と通気孔５との嵌合部の密封性が確保されている。 As shown in FIGS. 8 and 9, the cylindrical leg 22 is formed with a triangular ridge 24 or a through hole (not shown) in order to increase the coupling force with the inside of the plug. It is also preferable to form the bulging portion 25 (see FIG. 10).
Also, as already described with reference to FIG. 3, in FIGS. 8 and 9, the sealing material such as the O-ring is omitted altogether, and the plugs 1 are elastically compressed by the ridges 3 and 3 of the plug 1. The sealing performance of the fitting portion between the body 1 and the ventilation hole 5 is ensured.

なお、被覆カバー20の形状は、図８，図９のように角部が丸味（アール部）のあるものが望ましいが、これを角型としたり、筒状脚部22の外径よりも大きく、ラジアル外方へ延伸したきの子形状（図10参照）とするも、自由である。   The shape of the covering cover 20 is desirably rounded (rounded) as shown in FIGS. 8 and 9, but may be square or larger than the outer diameter of the cylindrical leg 22. However, the shape of the child extending radially outward (see FIG. 10) is also free.

次に、図10，図11に於て、本発明の第２の実施形態を示す。図10は自由状態を示し、図11は装着状態を示す。
栓体１の縦断面形状は、図７と同様のものとした場合を例示する。この第２の実施形態にあっては、栓体１の構造，形状及び作用と機能は、図７で既に述べた通りである。従って、図７に比べて、相違している構造，形状及び作用と機能について、以下、説明する。 Next, FIGS. 10 and 11 show a second embodiment of the present invention. FIG. 10 shows a free state, and FIG. 11 shows a mounted state.
The vertical cross-sectional shape of the plug 1 is the same as that shown in FIG. In the second embodiment, the structure, shape, operation and function of the plug 1 are as already described with reference to FIG. Therefore, a structure, a shape, an operation, and a function different from those in FIG. 7 will be described below.

即ち、図10，図11に示すように、栓体１の外端面４の呼吸フィルタ10を、所定間隔Ｈ20をもって、被覆する天井壁面部21を有する被覆カバー20が、付設されている。
さらに、被覆カバー20は、天井壁面部21から下方（内方）へ突設された筒状脚部22を、一体に有する。この筒状脚部22の下半部は、栓体１に侵入状態で、固着されている。 That is, FIG. 10, as shown in FIG. 11, the breathing filter 10 of the outer end face 4 of the plug 1, with a predetermined interval H 20, covering a cover 20 having a ceiling wall portion 21 which covers have been attached.
Further, the covering cover 20 integrally has a cylindrical leg portion 22 protruding downward (inward) from the ceiling wall surface portion 21. The lower half of the cylindrical leg 22 is fixed to the plug 1 so as to enter the plug 1.

この筒状脚部22の周壁には、外部Ｙに連通する小径副通気孔23が複数個貫設されている。
また、被覆カバー20の筒状脚部22は、生ゴム材料の加熱加圧による加硫成形工程において栓体１を成形する際に、同様に栓体内部に突入状として埋設される。
言い換えれば、（図８，図９も同様であるが、）生ゴム材料の加熱加圧による栓体１の加硫成形時に、呼吸フィルタ10、及び、被覆カバー20が、栓体１に一体化される。 A plurality of small-diameter sub-air holes 23 communicating with the outside Y are provided through the peripheral wall of the cylindrical leg portion 22.
When the plug 1 is formed in the vulcanization molding step by heating and pressing the raw rubber material, the cylindrical leg portion 22 of the covering cover 20 is similarly buried in the plug to protrude inside.
In other words, the respiratory filter 10 and the cover 20 are integrated with the plug 1 during vulcanization molding of the plug 1 by heating and pressing the raw rubber material (similarly in FIGS. 8 and 9). You.

なお、図10，図11に示すように、被覆カバー20の天井壁面部21は、筒状脚部22からラジアル外方へ延設され、かつ、栓体１の外端部位を包囲するように、内方（下方）へ弯曲したきの子の傘型乃至菅笠形状である。外部Ｙから水や粉塵等が強力に飛来しても副通気孔23から、被覆カバー20の内空室26へ浸入するのを防止する。   As shown in FIGS. 10 and 11, the ceiling wall portion 21 of the cover 20 extends radially outward from the cylindrical leg portion 22 and surrounds the outer end portion of the plug 1. The umbrella shape or the squash shape of the mushroom that curves inward (downward). Even if water, dust, etc. fly strongly from the outside Y, it is prevented from penetrating into the inner space 26 of the cover 20 through the sub-ventilation hole 23.

次に、図12〜図16に於て、本発明に係る栓体１の加硫成形方法及び成形金型、さらに、呼吸フィルタ10の固着方法等を、簡略に説明する。
図12〜図16に於て、14は上型、15は中型、16は下型を示す。中型15には、栓体１（図１参照）の外形状に対応する中型キャビティ部17が形成されている。下型16と中型15とを図12に示すように合わせて、上方開口空室部18を形成し、まず、呼吸フィルタ10を矢印Ｆ10のように装入して、下型16の上面に設置する。
なお、下型16の上面の所定位置に、呼吸フィルタ10を設置してから、次に、中型15を下降させて、図12の実線で示すように、中型15と下型16を閉じても、良い。 Next, a vulcanization molding method and a molding die of the plug 1 according to the present invention, a method of fixing the respiratory filter 10, and the like will be briefly described with reference to FIGS.
12 to 16, reference numeral 14 denotes an upper die, 15 denotes a middle die, and 16 denotes a lower die. The middle mold 15 has a middle cavity 17 corresponding to the outer shape of the plug 1 (see FIG. 1). By combining the lower mold 16 and medium 15 as shown in FIG. 12, to form an upper opening vacant chamber 18, first, the breathing filter 10 was charged as indicated by the arrow F 10, the upper surface of the lower die 16 Install.
In addition, after the respiratory filter 10 is installed at a predetermined position on the upper surface of the lower mold 16, the middle mold 15 is then lowered, and the middle mold 15 and the lower mold 16 are closed as shown by the solid line in FIG. ,good.

次に、円柱形状の中子19を垂下状に有する上型14を下降させて、図13に示す如く、中子19の下端面19Ａを呼吸フィルタ10の中心部を軽く押圧する。この図13に示したように、成形用キャビティ45が形成される。   Next, the upper mold 14 having the cylindrical core 19 in a hanging shape is lowered, and the lower end surface 19A of the core 19 is lightly pressed against the center of the respiratory filter 10, as shown in FIG. As shown in FIG. 13, a molding cavity 45 is formed.

次に、図14に示すように、キャビティ45内へ生ゴム材料を注入する。キャビティ45に生ゴム材料が充填され、底面側の呼吸フィルタ10の上面に対して生ゴム材料は高圧力をもって接触する。   Next, as shown in FIG. 14, a raw rubber material is injected into the cavity 45. The cavity 45 is filled with a raw rubber material, and the raw rubber material contacts the upper surface of the breathing filter 10 on the bottom side with high pressure.

金型は予め所定高温に加熱されているため、キャビティ45内で生ゴム材料は、加熱加圧されて（所定時間後には）、加硫が完了する。このとき、図15に示した形状であって、かつ、呼吸フィルタ10の上面の繊維が、加熱された栓体１と一体積層状として強力に固着される（図１（Ｂ）参照）。
その後（冷却後）、図16に示すように、（上型14を上方へ分離し、）かつ、中型15と下型16を分離しつつ、突き出し棒47によって、製品を取出す。その後は、バリ48等を除去して、本発明に係る通気防水構造体としての呼吸フィルタ10付の栓体１が製造できる。 Since the mold is previously heated to a predetermined high temperature, the raw rubber material is heated and pressurized in the cavity 45 (after a predetermined time), and vulcanization is completed. At this time, the fibers having the shape shown in FIG. 15 and on the upper surface of the respiratory filter 10 are strongly adhered to the heated plug 1 as an integral laminate (see FIG. 1B).
Thereafter (after cooling), as shown in FIG. 16, the product is taken out by the protruding rod 47 while separating the upper mold 14 upward and separating the middle mold 15 and the lower mold 16. After that, the burr 48 and the like are removed, and the plug 1 with the respiratory filter 10 as the ventilation waterproof structure according to the present invention can be manufactured.

なお、図８〜図11に示したように、被覆カバー20を備えている通気防水構造体の製造にあっては、プラスチック製の被覆カバー20を予め製作しておいて、図12に於ける下型16に形成した（図示省略の）嵌込凹部に製作した被覆カバー20を保持し、その保持状態下で、図14〜図15に示した加熱加圧を伴う加硫を行えば良い（詳細図示を省略する）。   As shown in FIGS. 8 to 11, in manufacturing the ventilated waterproof structure including the covering cover 20, the covering cover 20 made of plastic is manufactured in advance, and FIG. The produced cover 20 is held in a fitting recess (not shown) formed in the lower die 16 and vulcanization involving heating and pressurization shown in FIGS. Detailed illustration is omitted).

以上説明した本発明に係る通気防水構造体の用途について述べると、自動車用のヘッドライト、フォグライト、テールランプ、及び、一般用ライト、電子コントロールユニット（ＥＣＵ）、電気かみそり、イヤフォン、湿度・温度・圧力・ガス等のセンサー、各種電動モータ、ハイブリッド自動車用のインバータ、充電器、電源モジュール、バッテリー、トラクションモータ、さらには、各種液体タンク等に使用され、既述した図面に示した筐体８の筐体壁部８Ａに取着して使用される。筐体８の内部の密閉状空間Ｅと外部Ｙとの間に空気及び熱の出入りが自由に行われ、かつ、外部Ｙから水及び粉塵の密閉状空間Ｅへの浸入を阻止する。   The applications of the ventilated waterproof structure according to the present invention described above are described as follows: headlights for automobiles, fog lights, tail lamps, general lights, electronic control units (ECUs), electric razors, earphones, humidity / temperature / Sensors for pressure, gas, etc., various electric motors, inverters for hybrid vehicles, chargers, power supply modules, batteries, traction motors, and various kinds of liquid tanks and the like. It is used by being attached to the housing wall 8A. Air and heat can freely enter and exit between the sealed space E inside the housing 8 and the outside Y, and prevent water and dust from entering the sealed space E from the outside Y.

また、図８〜図11に示したような被覆カバー20を備えた構造のものでは、高圧洗浄水等の水が呼吸フィルタ10へ直接的に当ることを、防止でき、呼吸フィルタ10が保護されて寿命が延び、かつ、水等の付着を防止して通気性を確保できる利点がある。   Further, in the structure having the covering cover 20 as shown in FIGS. 8 to 11, water such as high-pressure washing water can be prevented from directly hitting the respiratory filter 10, and the respiratory filter 10 is protected. This has the advantage that the life can be prolonged, and the adhesion of water or the like can be prevented to ensure air permeability.

本発明は、以上詳述したように、密閉状空間Ｅと外部Ｙとを連通する通気孔５に嵌着される貫孔２付の栓体１と、該栓体１のアキシャル方向外端面４に固着されて上記貫孔２を閉鎖する通気性と防水性を有する呼吸フィルタ10とを、備えた通気防水構造に於て；上記栓体１は、生ゴム材料の加熱加圧による加硫成形にて成形され；上記呼吸フィルタ10は、上記栓体１の上記加硫成形にて、上記アキシャル方向外端面４に、一体積層状として固着されている構成であるので、部品点数が減少できて、しかも、コンパクト化を図り得る。かつ、通気孔５に嵌着した状態下で不要な突出部が無くなり、又は、突出部の容積が減少する。（従来例の図18と対比すれば明らかである。）さらに、従来例の図18に示した栓体42では、呼吸フィルタ35をプラスチックの頭部42Ａ上面に接着剤にて取着する作業（手間）を要すると共に、接着強度が不安定かつ不十分となる虞れがあったが、本発明では、生ゴム材料が呼吸フィルタ10の繊維に対して、高い圧力（加圧）にて浸入して、その状態下で加熱されることで、図１（Ｂ）の如き状態となり、接合強度が高く、かつ、安定する。故に、使用状態下で、筐体８の内部の密閉状空間から、急激な高圧（さらには熱風）が作用しても、呼吸フィルタ10が栓体１から部分剥離を発生せず、安定した耐久性を発揮する。
さらに、従来例（図18）では、ネジ孔43への雄ネジ部44を螺進する作業が面倒であったが、本発明では、筐体１が弾性変形可能な加硫成形ゴムから成るので、筐体８の通気孔５に簡単かつ迅速に押込んで、図２（Ｂ）、図３（Ｂ）等に示す如く、取着できる。栓体１の外径寸法が、例えば、４ｍｍと小さい場合もあって、そのような小径の栓体１をゴムの弾性を利用して、簡単に押込んで取着できる点は、ＥＣＵ，電気かみそり，イヤフォン等の、特に小径の通気孔５を有する筐体８への用途にとって、重要な利点であるといえる。しかも、Ｏリング等を使用せずに、小径の通気孔５へ押込めば、密封性が確保されるので、従来の図18に示した小径のＯリング38の紛失が螺進作業の際に発生することをも有効防止できる。 As described in detail above, the present invention provides a plug 1 having a through hole 2 fitted into a vent hole 5 that communicates a sealed space E with the outside Y, and an axially outer end face 4 of the plug 1. And a breathable and waterproof breathable filter 10 for closing the through-hole 2 so as to close the through-hole 2. The plug 1 can be vulcanized by heating and pressing a raw rubber material. The respiratory filter 10 is configured so as to be integrally laminated on the axially outer end face 4 by the vulcanization molding of the plug 1 so that the number of parts can be reduced, In addition, compactness can be achieved. In addition, unnecessary protrusions are eliminated in a state where the protrusions are fitted into the ventilation holes 5, or the volume of the protrusions is reduced. (It is clear from comparison with FIG. 18 of the conventional example.) Further, in the plug 42 shown in FIG. 18 of the conventional example, the work of attaching the respiratory filter 35 to the upper surface of the plastic head 42A with an adhesive ( Labor), and the adhesive strength may be unstable and insufficient. However, in the present invention, the raw rubber material penetrates into the fibers of the respiratory filter 10 at a high pressure (pressurized). By heating in this state, the state as shown in FIG. 1B is obtained, and the bonding strength is high and stable. Therefore, even when a sudden high pressure (and hot air) acts from the sealed space inside the housing 8 under the use condition, the respiratory filter 10 does not cause partial peeling from the plug 1 and provides stable durability. Demonstrate the nature.
Further, in the conventional example (FIG. 18), the operation of screwing the male screw portion 44 into the screw hole 43 is troublesome. However, in the present invention, since the housing 1 is made of vulcanized molded rubber that can be elastically deformed. It can be easily and quickly pushed into the ventilation hole 5 of the housing 8 and attached as shown in FIGS. 2 (B) and 3 (B). The outer diameter of the plug 1 may be as small as 4 mm, for example, and the plug 1 having such a small diameter can be easily pushed in and attached using the elasticity of rubber. This is an important advantage for use in a case 8 having an air hole 5 having a small diameter, such as an earphone and an earphone. Moreover, if the O-ring 38 is pushed into the small-diameter vent hole 5 without using an O-ring or the like, the sealing performance is ensured, and the small-diameter O-ring 38 shown in FIG. This can be effectively prevented from occurring.

また、本発明は、上記呼吸フィルタ10を所定間隔Ｈ20をもって被覆する天井壁面部21と、該天井壁面部21から突設されると共に外部Ｙに連通する副通気孔23を有する筒状脚部22とを、備えた被覆カバー20を、付設し；しかも、上記被覆カバー20の上記筒状脚部22は、上記栓体１の上記加硫成形にて、上記アキシャル方向外端面４に一体状に埋設されているので、部品点数が減少し、コンパクト化も図り得る。従来例の図17に示した構造では、２個のＯリング38，40を必要としていたので、筐体31の通気孔32への取付作業に手間取るという問題、及び、Ｏリング38，40を落下紛失する問題があったが、これらの問題を解決できる。
即ち、図９又は図11に示すように、Ｏリングが全く不要となり、通気孔５に対して、加硫ゴムの弾性変形自在性を利用しつつ単純に押込めば、迅速容易に取付作業が完了する。
しかも、図17の従来例では、初めに栓体33を取着し、その後に、被覆カバー36を外嵌状に取着し、その後にＯリング40を取付けねばならないという面倒（非能率）な取着作業を要していたのに対して、本発明では、栓体１と被覆カバー20を一体として同時に取着でき、迅速かつ容易な取着作業を実現している。 Further, the present invention includes a ceiling wall portion 21 which covers the breathing filter 10 at a predetermined interval H 20, the tubular legs having a secondary vent hole 23 communicating with the outside Y together are protruded from the ceiling wall portion 21 And the cylindrical leg portion 22 of the cover cover 20 is formed integrally with the axially outer end face 4 by the vulcanization molding of the plug 1. , The number of parts is reduced, and compactness can be achieved. In the structure shown in FIG. 17 of the conventional example, two O-rings 38 and 40 are required, so that it takes time to attach the casing 31 to the ventilation holes 32, and the O-rings 38 and 40 are dropped. There were problems to be lost, but these problems can be solved.
That is, as shown in FIG. 9 or FIG. 11, the O-ring is not required at all, and if the O-ring is simply pushed into the ventilation hole 5 while utilizing the elastic deformability of the vulcanized rubber, the mounting operation can be quickly and easily performed. Complete.
In addition, in the conventional example of FIG. 17, the plug 33 is first attached, the cover 36 is then attached in an externally fitted shape, and the O-ring 40 must be attached thereafter, which is troublesome (inefficient). In contrast to the necessity of the attaching work, in the present invention, the plug 1 and the cover 20 can be integrally attached at the same time, realizing a quick and easy attaching work.

また、本発明は、シール材を使用せず、上記栓体１を形成する加硫ゴム自身の弾発付勢力によって、栓体１と上記通気孔５との嵌合部の密封性を保つように構成したので、図17，図18に示した従来のＯリング38，40を省略できて、部品点数低減、及び、取着作業時のＯリング38，40の落下紛失の防止を、達成できた。しかも、栓体１を通気孔５に挿入する押込作業が迅速かつ容易に行い得る。   Further, the present invention maintains the sealing performance of the fitting portion between the plug 1 and the air hole 5 by the elastic urging force of the vulcanized rubber itself forming the plug 1 without using a sealing material. Since the conventional O-rings 38 and 40 shown in FIGS. 17 and 18 can be omitted, the number of parts can be reduced and the O-rings 38 and 40 can be prevented from dropping and losing during attachment work. Was. Moreover, the pushing operation for inserting the plug 1 into the ventilation hole 5 can be performed quickly and easily.

１ 栓体
２ 貫孔
４ 外端面
５ 通気孔
10 呼吸フィルタ
20 被覆カバー
21 天井壁面部
22 筒状脚部
23 副通気孔
Ｅ 密閉状空間
Ｙ 外部
Ｈ20 所定間隔 DESCRIPTION OF SYMBOLS 1 Plug body 2 Through hole 4 Outer end face 5 Vent hole
10 Respiratory filter
20 Insulated cover
21 Ceiling wall
22 cylindrical leg
23 Secondary air vent E Sealed space Y External H 20 Predetermined interval

Claims (2)

密閉状空間（Ｅ）と外部（Ｙ）とを連通する通気孔（５）に嵌着される貫孔（２）付の栓体（１）と、該栓体（１）のアキシャル方向外端面（４）に固着されて上記貫孔（２）を閉鎖する通気性と防水性を有する呼吸フィルタ（10）とを、備えた通気防水構造に於て、
上記栓体（１）は、生ゴム材料の加熱加圧による加硫成形にて成形され、
上記呼吸フィルタ（10）は、上記栓体（１）の上記加硫成形にて、上記アキシャル方向外端面（４）に、一体積層状として固着されており、
上記呼吸フィルタ（10）を所定間隔（Ｈ 20 ）をもって被覆する天井壁面部（21）と、該天井壁面部（21）から突設されると共に外部（Ｙ）に連通する副通気孔（23）を有する筒状脚部（22）とを、備えた被覆カバー（20）を、付設し、
しかも、上記被覆カバー（20）の上記筒状脚部（22）は、上記栓体（１）の上記加硫成形にて、上記アキシャル方向外端面（４）に一体状に埋設されていることを特徴とする通気防水構造体。 A plug (1) with a through-hole (2) fitted into a vent (5) communicating the closed space (E) and the outside (Y), and an axially outer end face of the plug (1) A breathable and waterproof breathable filter (10) fixed to (4) and closing the through hole (2);
The plug (1) is formed by vulcanization of a raw rubber material by heating and pressing.
The respiratory filter (10) is fixed to the axially outer end surface (4) as an integral laminate by the vulcanization molding of the plug (1) ,
A ceiling wall portion (21) for covering the respiratory filter (10) at a predetermined interval (H 20 ); and a sub vent hole (23) protruding from the ceiling wall portion (21) and communicating with the outside (Y). A covering cover (20) provided with a tubular leg (22) having
Moreover, the cylindrical leg portion (22) of the covering cover (20) is embedded integrally with the axially outer end surface (4) by the vulcanization molding of the plug body (1) . A vented waterproof structure characterized by the following. シール材を使用せず、上記栓体（１）を形成する加硫ゴム自身の弾発付勢力によって、栓体（１）と上記通気孔（５）との嵌合部の密封性を保つように構成した請求項１記載の通気防水構造体。 The sealing property of the fitting portion between the plug (1) and the air hole (5) is maintained without the use of a sealing material by the elastic urging force of the vulcanized rubber itself forming the plug (1). The ventilated waterproof structure according to claim 1, wherein:
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