JP2014172455A - Ventilation water impermeable unit and ventilation water impermeable device - Google Patents

Ventilation water impermeable unit and ventilation water impermeable device Download PDF

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JP2014172455A
JP2014172455A JP2013044923A JP2013044923A JP2014172455A JP 2014172455 A JP2014172455 A JP 2014172455A JP 2013044923 A JP2013044923 A JP 2013044923A JP 2013044923 A JP2013044923 A JP 2013044923A JP 2014172455 A JP2014172455 A JP 2014172455A
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ventilation
cylindrical surface
outer case
case
water
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JP5760026B2 (en
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Susumu Tsubokawa
将 坪川
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Fujikura Composites Inc
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Fujikura Rubber Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1605—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior
    • B65D51/1616—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior by means of a filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation water impermeable unit and a ventilation water impermeable device using this unit, simple in a constitution, and excellent in moldability and assemblability of a rubber part and retentivity of a ventilation water impermeable sheet, which are constituted of two rubber parts and the ventilation water impermeable sheet, in the ventilation water impermeable unit for holding the ventilation water impermeable sheet by a unit separate from a housing.SOLUTION: The ventilation water impermeable sheet is sandwiched and held between a rubber outer case and an inner case. The ventilation water impermeable sheet is sandwiched between an inner case side surface of a perforated top plate part of the outer case and an outer case side end surface of the inner case, and a taper inner cylindrical surface for reducing a diameter toward an end part on the opposite side of the perforated top plate part of a cylindrical part, is formed on a cylindrical part inner peripheral surface of the outer case, and a taper outer cylindrical surface having a larger diameter than the taper inner cylindrical surface of the outer case in a free state and reducing in diameter by being fitted to the taper inner cylindrical surface, is formed on an outer peripheral surface of the inner case.

Description

本発明は、通気非透水シート（撥水性微多孔部材）を用いた通気非透水ユニット（アッセンブリ）及び同ユニットを装着した通気非透水装置に関する。   The present invention relates to a vent impermeable unit (assembly) using a vent impermeable sheet (water repellent microporous member) and a vent impermeable device equipped with the unit.

液体を透過せず空気（気体）を透過させる通気非透水シート（膜部材、フィルム部材）は、例えばＰＴＦＥ多孔質膜として知られている。この通気非透水シートは、例えば、通気を要する空間（要通気空間）を画成するハウジングの貫通穴を塞ぐように設け、該要通気空間への液体の浸入を防ぎながら外部空間との気体の流通を許すために用いられている（特許文献１）。   A ventilation impermeable sheet (a membrane member, a film member) that does not transmit liquid but allows air (gas) to pass therethrough is known as, for example, a PTFE porous membrane. This air-impermeable and water-impermeable sheet is provided, for example, so as to close a through hole of a housing that defines a space requiring ventilation (necessary ventilation space), and prevents gas from entering the external space while preventing liquid from entering the ventilation space. It is used to allow distribution (Patent Document 1).

特許文献１は、通気非透水シートをハウジング貫通穴の周縁に固定する場合の特別な構成を提案している。一方、通気非透水シートをハウジングの貫通穴周縁に直接固定することなく、ハウジングとは別のユニットに保持し、同ユニットをハウジング貫通穴に装着（脱着）するタイプの通気非透水装置も知られている。   Patent Document 1 proposes a special configuration in the case of fixing the ventilation impermeable sheet to the periphery of the housing through hole. On the other hand, there is also known a type of ventilation / impermeable device that does not directly fix the ventilation / impermeable sheet to the periphery of the through hole of the housing, but holds it in a unit different from the housing and attaches / detaches the unit to / from the housing through hole. ing.

特開２００９-７８８６６号公報JP 2009-78866 A

本発明は、通気非透水シートをハウジングとは別のユニットに保持するタイプの通気非透水ユニットであって、２つのゴム部品と通気非透水シートで構成され、構成が単純でゴム部品の成形性、組立性及び通気非透水シートの保持性に優れた通気非透水ユニットを得ることを目的とする。
また、本発明は、同通気非透水ユニットを用いた通気非透水装置であって、ハウジング貫通穴へ容易に装着できかつ十分な装着力が得られる通気非透水装置を得ることを目的とする。 The present invention is a ventilation / water-permeable unit of a type in which a ventilation / water-impermeable sheet is held in a unit separate from a housing, and is composed of two rubber parts and a ventilation / water-impermeable sheet. Another object of the present invention is to obtain a ventilation / water-permeable unit that is excellent in assemblability and retention of a ventilation / water-impermeable sheet.
Another object of the present invention is to provide an air-impermeable device using the air-impermeable and water-impermeable unit, which can be easily installed in a housing through-hole and has a sufficient mounting force.

本発明の通気非透水ユニットは、ともにゴム製のアウタケースとインナケースの間に、通気非透水シートを挟着保持するもので、アウタケースは、有孔天板部と筒状部を一体に有し、インナケースは、該アウタケースの筒状部に嵌まる有孔円筒体からなり、アウタケースの有孔天板部のインナケース側の面とインナケースのアウタケース（の有孔天板部）側の端面との間に通気非透水シートが挟着され、アウタケースの筒状部内周面には、該筒状部の有孔天板部とは反対側の端部に向けて径を縮小するテーパ内円筒面が形成されており、インナケースの外周面には、自由状態でアウタケースのテーパ内円筒面より大径で該テーパ内円筒面に嵌合されることで縮径するテーパ外円筒面が形成されていることを特徴としている。   The ventilation / water-impervious unit according to the present invention is configured to sandwich and hold a ventilation / water-impermeable sheet between a rubber outer case and an inner case, and the outer case integrally has a perforated top plate portion and a cylindrical portion. The inner case is formed of a perforated cylindrical body that fits into the cylindrical portion of the outer case, and the inner case side surface of the perforated top plate portion of the outer case and the outer case of the inner case (the perforated top plate) A gas-permeable and water-impermeable sheet is sandwiched between the outer surface and the inner peripheral surface of the outer case with a diameter toward the end opposite to the perforated top plate of the cylindrical portion. A tapered inner cylindrical surface is formed to reduce the diameter of the inner case by being fitted to the inner cylindrical surface of the outer case with a larger diameter than the inner cylindrical surface of the outer case in a free state. A tapered outer cylindrical surface is formed.

テーパ内円筒面とテーパ外円筒面の軸を含む断面における一対の母線のなす角度は、１５°〜６０°とすることが好ましい。この角度が６０°を超えると、ゴム製アウタケースをゴム成形型から離脱させるのが困難になり、１５°未満では、インナケースがアウタケースから脱落しやすくなる。なかでも、２０゜〜５０゜とすることが好ましい。   The angle formed by the pair of bus bars in the cross section including the axes of the tapered inner cylindrical surface and the tapered outer cylindrical surface is preferably 15 ° to 60 °. If this angle exceeds 60 °, it is difficult to remove the rubber outer case from the rubber mold, and if it is less than 15 °, the inner case easily falls off the outer case. Especially, it is preferable to set it as 20 degrees-50 degrees.

通気非透水シートを挟着する、アウタケースの有孔天板部のインナケース側の面と、インナケースの有孔天板部側の端面との少なくとも一方には、該通気非透水シートと線状に接触する環状突起を設けることが好ましい。   At least one of the inner case-side surface of the perforated top plate portion of the outer case and the end surface of the inner case on the perforated top plate portion side, on which the air-permeable impermeable sheet is sandwiched, is lined with the air-permeable impermeable sheet. It is preferable to provide an annular protrusion that contacts the shape.

アウタケースの筒状部の外周面には、テーパ内円筒面の外側に位置させて、環状抜止突部が形成されている。そして、このアウタケース（通気非透水ユニット）を受け入れるハウジングの貫通穴には、アウタケースの有孔天板部がハウジング表面に当接した状態において、環状抜止突部を受け入れる抜止内円筒面が形成されている。環状抜止突部の自由状態における径は、抜止内円筒面の径より大きく、貫通穴への通気非透水ユニットの装着状態で圧縮されて抜止が図られる。   An annular retaining protrusion is formed on the outer peripheral surface of the cylindrical portion of the outer case so as to be positioned outside the inner cylindrical surface of the taper. A through-hole in the housing that receives the outer case (ventilating / impermeable unit) is formed with a retaining inner cylindrical surface that accepts the annular retaining protrusion when the perforated top plate of the outer case is in contact with the housing surface. Has been. The diameter of the annular retaining protrusion in the free state is larger than the diameter of the retaining inner cylindrical surface, and the annular retaining protrusion is compressed in a state where the ventilation / water-impervious unit is mounted in the through hole to prevent the annular retaining protrusion.

すなわち、本発明は、通気非透水装置の態様では、要通気空間を画成するケーシングと、該ケーシングに形成された貫通穴に装着される通気非透水ユニットとからなる通気非透水装置において、ハウジングの貫通穴には、アウタケースの上記有孔天板部がハウジング表面に当接した状態において、上記環状抜止突部を受け入れる、自由状態の該環状抜止突部より小径の抜止内円筒面が形成されていることを特徴としている。   That is, the present invention provides a ventilation / water-impermeable device comprising a casing defining a ventilation space and a ventilation / water-impermeable unit mounted in a through hole formed in the casing. In the through hole of the outer case, in the state where the perforated top plate portion of the outer case is in contact with the surface of the housing, a retaining inner cylindrical surface having a smaller diameter than the annular retaining projection in a free state is formed to receive the annular retaining projection. It is characterized by being.

本発明の通気非透水ユニットによれば、２つのゴム部品と通気非透水シートで構成され、構成が単純でゴム部品の成形性、組立性及び通気非透水シートの保持性に優れた通気非透水ユニットを得ることができる。また本発明によれば、同通気非透水ユニットを用いた通気非透水装置であって、ハウジング貫通穴へ容易に装着できかつ十分な装着力が得られる通気非透水装置を得ることができる。   According to the air-impermeable and water-impermeable unit of the present invention, the air-impermeable and water-impermeable sheet is composed of two rubber parts and a gas-permeable and water-impermeable sheet and has a simple structure and excellent rubber moldability, assemblability, and air-permeable and water-impermeable sheet retention. You can get a unit. Moreover, according to this invention, it is the ventilation impermeable apparatus using the said ventilation impermeable unit, Comprising: The ventilation impermeable apparatus which can be easily mounted | worn to a housing through-hole and sufficient mounting force can be obtained.

本発明による通気非透水装置の一実施形態を示す分解状態の縦断面図である。It is a longitudinal section of an exploded state showing one embodiment of a ventilation impermeable device by the present invention. 図１の通気非透水装置中の通気非透水ユニットを組み立てた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which assembled the ventilation non-permeable unit in the ventilation non-permeable apparatus of FIG. 図１の通気非透水装置を組み立てた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which assembled the ventilation non-permeable apparatus of FIG.

図１は、本発明による通気非透水装置を分解状態で示し、図２は、図１中の通気非透水ユニット（アッセンブリ）を組立状態で示し、図３は、図１の通気非透水装置を組立状態で示している。   FIG. 1 shows the vented and impermeable device according to the present invention in an exploded state, FIG. 2 shows the vented and impermeable unit (assembly) in FIG. 1 in an assembled state, and FIG. 3 shows the vented and impermeable device in FIG. Shown in the assembled state.

図１は、通気非透水ユニット１０と、要通気空間Ｘを画成するハウジング２０を示している。通気非透水ユニット１０は、ハウジング２０に形成されている貫通穴２１に装着（着脱）される。通気非透水ユニット１０の構成要素及び貫通穴２１は、軸Ｏを中心とする回転対称形状をなしている。   FIG. 1 shows a ventilation / impermeable unit 10 and a housing 20 that defines a ventilation space X. The ventilation / non-water-permeable unit 10 is attached (detached) to a through hole 21 formed in the housing 20. The components of the ventilation / non-water-permeable unit 10 and the through hole 21 have a rotationally symmetric shape with the axis O as the center.

通気非透水ユニット１０は、共にゴム製（例えばフッ素ゴム、Ｈ・ＮＢＲ）のアウタケース１１とインナケース１２、及びこのアウタケース１１とインナケース１２の間に挟着保持される通気非透水シート（フィルム）１３とからなっている。アウタケース１１は、軸Ｏ上に位置する通気穴１１ａを有する天板部１１ｂと、有孔天板部１１ｂの図の下面から延びる筒状部１１ｃとを同軸に有している。有孔天板部１１ｂのインナケース１２側の面（図の下面）は軸直交平面であり、筒状部１１ｃの内側の軸直交平面は、シート挟着面１１ｂ１を構成し、筒状部１１ｃの外側の軸直交平面はハウジング弾接面１１ｂ２を構成する。   The ventilation / water-impermeable unit 10 includes an outer case 11 and an inner case 12 both made of rubber (for example, fluororubber, H / NBR), and a ventilation / impermeable sheet (which is sandwiched and held between the outer case 11 and the inner case 12). Film) 13. The outer case 11 has a top plate portion 11b having a vent hole 11a located on the axis O and a cylindrical portion 11c extending from the bottom surface of the perforated top plate portion 11b in the same axis. The surface (lower surface in the figure) of the perforated top plate portion 11b on the inner case 12 side is an axis orthogonal plane, and the axis orthogonal plane inside the cylindrical portion 11c constitutes the sheet clamping surface 11b1, and the cylindrical portion 11c. The outer axis orthogonal plane of the housing constitutes the housing elastic contact surface 11b2.

筒状部１１ｃの内周面には、有孔天板部１１ｂ側の定径内円筒面１１ｃ１と、有孔天板部１１ｂの反対側の端部に向けて徐々に（滑らかに）縮径するテーパ内円筒面１１ｃ２が形成されている。このテーパ内円筒面１１ｃ２のテーパ内円筒面の軸を含む断面における一対の母線のなす角度αは、１５゜〜６０゜の範囲とされている。また、筒状部１１ｃの外周面には、定径内円筒面１１ｃ１の形成エリアに対応する定径外円筒面１１ｃ３と、テーパ内円筒面１１ｃ２の形成エリアに対応する環状抜止突部１１ｃ４が形成されている。   On the inner peripheral surface of the cylindrical portion 11c, the diameter gradually decreases (smoothly) toward the constant-diameter inner cylindrical surface 11c1 on the perforated top plate portion 11b side and the opposite end of the perforated top plate portion 11b. A tapered inner cylindrical surface 11c2 is formed. The angle α formed by the pair of bus bars in the cross section including the axis of the tapered inner cylindrical surface of the tapered inner cylindrical surface 11c2 is in the range of 15 ° to 60 °. Further, on the outer peripheral surface of the cylindrical portion 11c, a constant-diameter outer cylindrical surface 11c3 corresponding to the formation area of the constant-diameter inner cylindrical surface 11c1 and an annular retaining protrusion 11c4 corresponding to the formation area of the tapered inner cylindrical surface 11c2 are formed. Has been.

以上のように、筒状部１１ｃの内周面に、軸を含む断面における一対の母線のなす角度αが上記範囲のテーパ内円筒面１１ｃ２を形成したアウタケース１１は、ゴム成形時の型部材から離型させることが容易で、破断のおそれがない。   As described above, the outer case 11 in which the angle α formed by the pair of generatrices in the cross section including the shaft is formed on the inner peripheral surface of the cylindrical portion 11c is the tapered inner cylindrical surface 11c2 in the above range. It is easy to release from the mold and there is no fear of breakage.

インナケース１２は、アウタケース１１の通気穴１１ａに対応する通気穴１２ａを軸線Ｏ上に有する有孔円筒体からなっている。このインナケース１２には、その奥側端面（アウタケース１１の有孔天板部１１ｂ側の端面）１２ｂに、複数の同心の環状突起（Ｖ断面突起）１２ｃが形成されている。   The inner case 12 is made of a perforated cylindrical body having a ventilation hole 12 a corresponding to the ventilation hole 11 a of the outer case 11 on the axis O. The inner case 12 is formed with a plurality of concentric annular protrusions (V-section protrusions) 12c on its rear end face (end face on the perforated top plate portion 11b side of the outer case 11) 12b.

また、インナケース１２の外周面には、アウタケース１１の定径内円筒面１１ｃ１に対応する定径外円筒面１２ｄと、テーパ内円筒面１１ｃ２に対応するテーパ外円筒面１２ｅが形成されている。このテーパ外円筒面１２ｅの軸を含む断面における一対の母線のなす角度αは、アウタケース１１のテーパ内円筒面１１ｃ２の同角度αと同一に設定されている。また、このテーパ外円筒面１２ｅの自由状態における外径は、テーパ内円筒面１１ｃ２の内径より若干大きく（例えば１０５％〜１１０％程度に）設定されていて、インナケース１２をアウタケース１１の筒状部１１ｃに嵌めると、テーパ内円筒面１１ｃ２が圧縮力を受けて拡径し、テーパ外円筒面１２ｅが縮径する。一方、定径外円筒面１２ｄは、定径内円筒面１１ｃ１と同一寸法またはこれより若干大径であり、定径内円筒面１１ｃ１に作用する圧縮力は、テーパ内円筒面１１ｃ２に作用する圧縮力より小さい。   Further, on the outer peripheral surface of the inner case 12, a constant-diameter outer cylindrical surface 12d corresponding to the constant-diameter inner cylindrical surface 11c1 of the outer case 11 and a tapered outer cylindrical surface 12e corresponding to the tapered inner cylindrical surface 11c2 are formed. . An angle α formed by a pair of generatrices in the cross section including the axis of the tapered outer cylindrical surface 12e is set to be the same as the same angle α of the tapered cylindrical surface 11c2 of the outer case 11. Further, the outer diameter of the tapered outer cylindrical surface 12e in the free state is set slightly larger (for example, about 105% to 110%) than the inner diameter of the tapered inner cylindrical surface 11c2, and the inner case 12 is connected to the outer case 11 cylinder. When fitted into the shape portion 11c, the inner cylindrical surface 11c2 of the taper receives a compressive force and expands in diameter, and the outer cylindrical surface 12e of the taper decreases in diameter. On the other hand, the constant-diameter outer cylindrical surface 12d has the same dimension as or slightly larger than the constant-diameter inner cylindrical surface 11c1, and the compression force acting on the constant-diameter inner cylindrical surface 11c1 is a compression acting on the tapered inner cylindrical surface 11c2. Less than power.

通気非透水シート１３は、例えば商品名ゴアテックスで知られる通気性はあるが透水性はないＰＴＦＥシートである。その通気非透水の性質（レベル、性能）は、用途に応じて種々知られており、選択使用される。   The air-impermeable and water-impermeable sheet 13 is a PTFE sheet having air permeability but not water permeability known by, for example, a trade name Gore-Tex. Various properties (level, performance) of the air-permeable and water-impermeable are known depending on the application and are selectively used.

図２は、アウタケース１１、インナケース１２、通気非透水シート１３を組み立てた状態の通気非透水ユニット１０を示しており、アウタケース１１とインナケース１２の形状は、図１の変形前（自由状態）の形状を描いている。オーバラップしている部分は変形代を示している。図３についても表記は同様である。この組立状態では、通気非透水シート１３がアウタケース１１のシート挟着面１１ｂ１とインナケース１２の端面１２ｂ（環状突起１２ｃ）との間に挟着され、環状突起１２ｃが弾性変形して通気非透水シート１３を保持する。なお、環状突起１２ｃの数は、図示例では３本であるが、その数及び有無は任意である。   FIG. 2 shows the ventilation / impermeable unit 10 in a state where the outer case 11, the inner case 12, and the ventilation / impermeable sheet 13 are assembled. The shapes of the outer case 11 and the inner case 12 are the same as those shown in FIG. State) is drawn. The overlapping part shows the deformation allowance. The notation is the same for FIG. In this assembled state, the ventilation impermeable sheet 13 is clamped between the sheet clamping surface 11b1 of the outer case 11 and the end surface 12b (annular projection 12c) of the inner case 12, and the annular projection 12c is elastically deformed to prevent ventilation. The water permeable sheet 13 is held. The number of the annular protrusions 12c is three in the illustrated example, but the number and presence thereof are arbitrary.

また、アウタケース１１とインナケース１２を組み立てた状態の通気非透水ユニット１０では、図２に明らかなように、テーパ外円筒面１２ｅによってテーパ内円筒面１１ｃ２が径方向外方に押されて筒状部１１ｃが弾性変形し、アウタケース１１とインナケース１２（テーパ内円筒面１１ｃ２とテーパ外円筒面１２ｅ）の係合力が高まって抜止が図られる。このとき、環状抜止突部１１ｃ４は、筒状部１１ｃの変形に伴って外径を拡大する。テーパ内円筒面１１ｃ２とテーパ外円筒面１２ｅの軸を含む断面における一対の母線のなす角度αを上記範囲に設定することによって、アウタケース１１の成形型からの離型性を損なうことなく、アウタケース１１とインナケース１２の抜止を確実にすることができる。角度αが、１５゜未満ではアウタケース１１とインナケース１２の抜止効果が十分に得られず、６０゜を超えると、アウタケース１１を成形型から離型させるとき、破損のおそれが増す。この角度αは、特に、２０゜〜５０゜の範囲が好ましい。   Further, in the ventilation / water-impervious unit 10 in a state where the outer case 11 and the inner case 12 are assembled, as is apparent from FIG. 2, the tapered inner cylindrical surface 11c2 is pushed radially outward by the tapered outer cylindrical surface 12e. The shape portion 11c is elastically deformed, and the engagement force between the outer case 11 and the inner case 12 (the tapered inner cylindrical surface 11c2 and the tapered outer cylindrical surface 12e) is increased, thereby preventing the outer case 11 and the inner case 12 from coming off. At this time, the annular retaining protrusion 11c4 increases the outer diameter with the deformation of the cylindrical portion 11c. By setting the angle α formed by the pair of generatrices in the cross section including the axes of the tapered inner cylindrical surface 11c2 and the tapered outer cylindrical surface 12e within the above range, the outer case 11 can be released from the mold without impairing the mold release property. The case 11 and the inner case 12 can be reliably prevented from being detached. If the angle α is less than 15 °, the effect of preventing the outer case 11 and the inner case 12 from being sufficiently removed cannot be obtained. If the angle α exceeds 60 °, the possibility of breakage increases when the outer case 11 is released from the mold. This angle α is particularly preferably in the range of 20 ° to 50 °.

ハウジング２０の貫通穴２１には、アウタケース１１の有孔天板部１１ｂと筒状部１１ｃの接続部のＲ部を逃げる逃げ斜面２１ａと、アウタケース１１の定径外円筒面１１ｃ３に対応する定径内円筒面２１ｂと、定径内円筒面２１ｂより大径の抜止内円筒面２１ｃが形成されている。定径内円筒面２１ｂは、自由状態において、アウタケース１１の定径外円筒面１１ｃ３より若干大径であり、抜止内円筒面２１ｃは、アウタケース１１の開き防止機能を担うので、自由状態において環状抜止突部１１ｃ４と同一径または若干小径とするのがよい。   The through hole 21 of the housing 20 corresponds to the escape slope 21a that escapes the R portion of the connecting portion between the perforated top plate portion 11b of the outer case 11 and the cylindrical portion 11c, and the constant-diameter outer cylindrical surface 11c3 of the outer case 11. A constant-diameter inner cylindrical surface 21b and a retaining inner cylindrical surface 21c larger in diameter than the constant-diameter inner cylindrical surface 21b are formed. The constant-diameter inner cylindrical surface 21b has a slightly larger diameter than the constant-diameter outer cylindrical surface 11c3 of the outer case 11 in the free state, and the retaining inner cylindrical surface 21c functions to prevent the outer case 11 from being opened. It is preferable that the diameter is the same as or slightly smaller than that of the annular retaining protrusion 11c4.

従って、図３に示すように、通気非透水ユニット１０をハウジング２０の貫通穴２１に嵌めた状態では、アウタケース１１の定径外円筒面１１ｃ３には殆ど圧縮力は作用せず、定径外円筒面１１ｃ３（環状抜止突部１１ｃ４）と定径内円筒面２１ｂの嵌合関係によって、通気非透水ユニット１０の貫通穴２１内での位置が定まる。同時に環状抜止突部１１ｃ４が抜止内円筒面２１ｃ内で弾性変形することで、貫通穴２１からの通気非透水ユニット１０の抜止が図られる。環状抜止突部１１ｃ４は、貫通穴２１への嵌合状態で、抜止内円筒面２１ｃより若干定径内円筒面２１ｂ側に位置しており、このため、通気非透水ユニット１０には、ハウジング弾接面１１ｂ２がハウジング２０の外面２０ａに密着する力が作用する。   Therefore, as shown in FIG. 3, in a state where the ventilation / water-impervious unit 10 is fitted in the through hole 21 of the housing 20, almost no compressive force acts on the constant-diameter outer cylindrical surface 11 c 3 of the outer case 11. The position in the through-hole 21 of the ventilation non-permeable unit 10 is determined by the fitting relationship between the cylindrical surface 11c3 (annular retaining projection 11c4) and the constant-diameter inner cylindrical surface 21b. At the same time, the annular non-permeating projection 11c4 is elastically deformed in the non-preventing inner cylindrical surface 21c, so that the non-ventilated water-permeable unit 10 is prevented from being removed from the through hole 21. The annular retaining projection 11c4 is located slightly on the inner cylindrical surface 21b side with respect to the retaining inner cylindrical surface 21c in the fitted state with the through hole 21, and therefore, the ventilation non-permeable unit 10 includes a housing elastic member. A force that the contact surface 11b2 is in close contact with the outer surface 20a of the housing 20 acts.

以上の実施形態では、アウタケース１１のテーパ内円筒面１１ｃ２の軸を含む断面における一対の母線のなす角度αと、インナケース１２のテーパ外円筒面１２ｅの軸を含む断面における一対の母線のなす角度αを同一としたが、上記角度の範囲で、異ならせてもよい。また、アウタケース１１とインナケース１２は同一のゴム材料としたが、例えば内側のインナケース１２を、そのゴム硬度がアウタケース１１のゴム硬度より高い（硬い）材料から構成することで、アウタケース１１とインナケース１２の結合強度を高めることができる。   In the above embodiment, the angle α formed by the pair of bus bars in the cross section including the axis of the inner cylindrical surface 11c2 of the outer case 11 and the pair of bus bars in the cross section including the axis of the outer cylindrical surface 12e of the inner case 12 are formed. Although the angle α is the same, it may be varied within the above angle range. Further, the outer case 11 and the inner case 12 are made of the same rubber material. For example, the inner case 12 is made of a material whose rubber hardness is higher (harder) than that of the outer case 11, so that the outer case 11 is formed. 11 and the inner case 12 can be increased in bonding strength.

１０ 通気非透水ユニット
１１ アウタケース
１１ａ 通気穴
１１ｂ 有孔天板部
１１ｂ１ シート挟着面
１１ｂ２ ハウジング弾接面
１１ｃ 筒状部
１１ｃ１ 定径内円筒面
１１ｃ２ テーパ内円筒面
１１ｃ３ 定径外円筒面
１１ｃ４ 環状抜止突部
１２ インナケース
１２ａ 通気穴
１２ｂ 端面
１２ｃ 環状突起
１２ｄ 定径外円筒面
１２ｅ テーパ外円筒面
１３ 通気非透水シート
２０ ハウジング
２０ａ 外面
２１ 貫通穴
２１ａ 逃げ斜面
２１ｂ 定径内円筒面
２１ｃ 抜止内円筒面
Ｏ 軸
Ｘ 要通気空間 DESCRIPTION OF SYMBOLS 10 Ventilation impermeable unit 11 Outer case 11a Vent hole 11b Perforated top plate portion 11b1 Seat clamping surface 11b2 Housing elastic contact surface 11c Cylindrical portion 11c1 Constant diameter inner cylindrical surface 11c2 Tapered inner cylindrical surface 11c3 Constant diameter outer cylindrical surface 11c4 Anti-protrusion 12 Inner case 12a Vent hole 12b End surface 12c Annular projection 12d Constant-diameter outer cylindrical surface 12e Tapered outer cylindrical surface 13 Air-permeable impermeable sheet 20 Housing 20a Outer surface 21 Through hole 21a Escape slope 21b Constant-diameter inner cylindrical surface 21c Surface O Axis X Ventilation space required

Claims (4)

有孔天板部と筒状部を一体に有するゴム製アウタケースと、上記アウタケースの筒状部に嵌まる有孔円筒体からなるゴム製のインナケースと、上記アウタケースの有孔天板部のインナケース側の面と上記インナケースのアウタケース側の端面との間に挟着される通気非透水シートとを備え、
上記アウタケースの筒状部内周面には、該筒状部の有孔天板部とは反対側の端部に向けて径を縮小するテーパ内円筒面が形成されており、インナケースの外周面には、自由状態でアウタケースのテーパ内円筒面より大径で該テーパ内円筒面に嵌合されることで縮径するテーパ外円筒面が形成されていることを特徴とする通気非通水ユニット。 A rubber outer case integrally having a perforated top plate portion and a cylindrical portion, a rubber inner case made of a perforated cylindrical body that fits into the cylindrical portion of the outer case, and a perforated top plate of the outer case A ventilation impermeable sheet sandwiched between the inner case side surface of the inner case and the outer case side end surface of the inner case,
On the inner peripheral surface of the cylindrical portion of the outer case, a tapered inner cylindrical surface whose diameter decreases toward the end opposite to the perforated top plate portion of the cylindrical portion is formed. The surface is formed with a tapered outer cylindrical surface having a diameter larger than that of the outer tapered cylindrical surface of the outer case and being reduced in diameter by being fitted to the tapered inner cylindrical surface. Water unit. 請求項１記載の通気非通水ユニットにおいて、アウタケースの上記テーパ内円筒面と、インナケースの上記テーパ外円筒面の軸を含む断面における一対の母線のなす角度は、１５°〜６０゜である通気非透水ユニット。 2. The ventilation / non-water-permeable unit according to claim 1, wherein an angle formed by a pair of busbars in a cross section including an axis of the tapered inner cylindrical surface of the outer case and the tapered outer cylindrical surface of the inner case is 15 ° to 60 °. There is a vented and impermeable unit. 請求項１または２記載の通気非通水ユニットにおいて、アウタケースの上記筒状部の外周面には、上記テーパ内円筒面の外側に位置させて、環状抜止突部が形成されている通気非透水ユニット。 The ventilation non-water-permeable unit according to claim 1 or 2, wherein an annular retaining protrusion is formed on an outer peripheral surface of the cylindrical portion of the outer case so as to be positioned outside the inner cylindrical surface of the taper. Permeability unit. 請求項３記載の通気非通水ユニットを有する通気非透水装置であって、要通気空間を画成する、貫通穴を有するハウジングを備え、該貫通穴には、アウタケースの上記有孔天板部がハウジング表面に当接した状態において、上記環状抜止突部を受け入れる、自由状態の該環状抜止突部より小径の抜止内円筒面が形成されている通気非透水装置。 4. A ventilation / water-impermeable device having a ventilation / water-impermeable unit according to claim 3, further comprising a housing having a through hole that defines a ventilation space, wherein the perforated top plate of the outer case is provided in the through hole. A ventilation / water-impervious device in which a retaining inner cylindrical surface having a smaller diameter than the annular retaining projection in a free state is formed to receive the annular retaining projection in a state where the portion is in contact with the housing surface.
JP2013044923A 2013-03-07 2013-03-07 Ventilation impermeable device Active JP5760026B2 (en)

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