JP4784837B2 - Sealed mounting structure for parts - Google Patents

Sealed mounting structure for parts Download PDF

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JP4784837B2
JP4784837B2 JP2007190742A JP2007190742A JP4784837B2 JP 4784837 B2 JP4784837 B2 JP 4784837B2 JP 2007190742 A JP2007190742 A JP 2007190742A JP 2007190742 A JP2007190742 A JP 2007190742A JP 4784837 B2 JP4784837 B2 JP 4784837B2
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grommet
mounting hole
mounting
mounting plate
outer diameter
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JP2009024828A (en
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恒夫 望月
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Arai Seisakusho Co Ltd
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Arai Seisakusho Co Ltd
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Description

本発明は、部品の密封取付構造に関し、特に軸部を有する部品をグロメットを介して取付板の取付穴に密封的に取付ける密封取付構造に関するものである。   The present invention relates to a sealing mounting structure for parts, and more particularly to a sealing mounting structure for sealingly mounting a part having a shaft portion to a mounting hole of a mounting plate via a grommet.

従来部品取付装置としては、グロメットを用いたものが広く実施されている。そして、グロメットを用いた部品の取付装置としては、筒部にスリットが設けられるとともに上部外周に爪部が突出形成された樹脂製グロメットを前記の爪部によって取付部に仮止めしておき、固定用ピンの軸部を前記したグロメットの筒部の貫通孔に挿入すると、グロメットの貫通孔の外周面が固定ピンの軸部に押され、グロメットのスリットが拡開されることにより、グロメットは取付部に固定されるものが提案されている(特許文献1参照)。   As a conventional component mounting apparatus, one using a grommet has been widely implemented. And as a mounting device for parts using grommets, a resin grommet with a slit in the cylinder and a claw protruding from the upper outer periphery is temporarily fixed to the mounting by the claw and fixed. When the shaft part of the pin for use is inserted into the through-hole of the cylindrical part of the grommet described above, the outer peripheral surface of the through-hole of the grommet is pushed by the shaft part of the fixed pin, and the grommet slit is widened to attach the grommet. What is fixed to the part has been proposed (see Patent Document 1).

特開２００１−２４１４２０号公報JP 2001-241420 A

しかしながら、上記特許文献１に記載の取付装置においては、単に固定用ピンの軸をグロメットに挿入するのみで固定しているため抜け易く、簡単に脱落してしまう恐れがあり、また、特許文献1の取付装置にあっては、固定用ピンの軸部と取付部の取付孔の間のシール(密封)については全く考慮されてないため、シール性が求められる取付部には適用することができないという問題があった。   However, in the mounting device described in Patent Document 1, since it is fixed simply by inserting the shaft of the fixing pin into the grommet, it is easy to come off and there is a risk that it will easily fall off. In the mounting apparatus, since the seal (sealing) between the shaft portion of the fixing pin and the mounting hole of the mounting portion is not considered at all, it cannot be applied to a mounting portion that requires a sealing property. There was a problem.

そこで、本発明は、部品の軸部と取付穴のシール性を確保し、かつ、部品が簡単に脱落することのない部品の密封取付構造の提供を目的とするものである。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sealed mounting structure for a component that ensures the sealing performance between the shaft portion and the mounting hole of the component and does not easily drop off the component.

本発明に係る部品の密封取付構造は、前記の目的を達成するために、下部外周に凹部が形成された軸部を備えた部品を、下部内周面に凸部が形成されたゴム製のグロメットを介して取付板に取付ける部品の密封取付構造において、取付板は、グロメットを介して軸部を取り付ける取付穴が形成されており、グロメットは、上端にフランジ部を有し、その上端の面部から本体部の下端の面部にわたって貫通した中空部が形成されて、前記取付穴に装着される筒状の本体部を含み、本体部の筒長さは、前記取付板の上面にフランジ部が当接して取付穴に装着された際に、取付板の下面から突出する長さをもって形成されており、本体部のフランジ部寄りの外径は、前記取付穴の内径と略等しく形成され、かつ本体部の下部の外径は、取付板の取付穴の内径よりも小径に形成されており、本体部の下部内周面の凸部を除いた領域の内径は、軸部の外径よりも小径に形成されており、軸部は、取付板の取付穴の内径よりも小径な外径で、かつ、グロメットの中空部よりも長尺に形成されており、前記グロメットにおけるフランジ部寄りの外径をＡ、凸部を除いた領域の内径をＢとし、前記取付板の取付穴の内径をＣとし、前記の軸部の凹部を除く外径をＤとしたとき、前記Ａ，Ｂ，Ｃ及びＤは、Ａ−Ｂ＞Ｃ−Ｄの関係を有しており、前記取付穴にグロメットを装着し、下部の先端部分を取付板の下面より突出させたとき、グロメットの外径の領域は、取付穴の内面に接触し、取付穴の内部に配される外径の領域は、取付穴の内面との間に所定の隙間をもって位置しており、前記軸部をグロメットに挿入せしめるとともに、軸部の凹部にグロメットの凸部を嵌入せしめ、前記グロメットの下部の先端部分を取付板より突出させてグロメットを取付板に装着固定したとき、グロメットの外径の領域は、軸部により押圧されて取付穴の内面に押し付けられることでシール領域を形成し、グロメットの下部の外径のうち、取付穴の内部に位置している領域は、軸部により押圧されて拡開して取付穴の内面に接触し、取付板より突出している領域は、軸部によって押圧されて取付穴の端縁から先端部にいたるまでの全域が前記取付穴の内径よりも外方に向けて拡開していることをその特徴とし、さらに、前記したグロメットが取付板に装着固定されたとき、取付板より突出する該グロメットの先端部分の外径は前記取付穴の内径よりも拡開するとともに、部品の軸部に抜く方向の力が加わったとき、軸部に形成の凹部とグロメットに形成の凸部の嵌入部分から前記したグロメットの拡開された先端部分がさらに大きく広がるように構成したことをその特徴とするものである。
In order to achieve the above object, the component sealing mounting structure according to the present invention includes a component having a shaft portion in which a concave portion is formed on the outer periphery of the lower portion, and a rubber-made component in which a convex portion is formed on the lower inner peripheral surface. In the hermetic mounting structure for parts to be attached to the mounting plate via the grommet, the mounting plate has a mounting hole for attaching the shaft portion via the grommet, and the grommet has a flange portion at the upper end and the surface portion at the upper end. A hollow portion penetrating from the lower end surface portion of the main body portion is formed, and includes a cylindrical main body portion that is mounted in the mounting hole. The cylinder length of the main body portion is such that the flange portion is in contact with the upper surface of the mounting plate. It is formed with a length that protrudes from the lower surface of the mounting plate when mounted in contact with the mounting hole, and the outer diameter of the main body near the flange is formed to be substantially equal to the inner diameter of the mounting hole. The outer diameter of the lower part is the mounting plate mounting Of which is smaller in diameter than the inner diameter, the inner diameter of the region excluding the convex portion of the lower inner peripheral surface of the body portion than the outer diameter of the shaft portion is formed in a small diameter, shank, the mounting plate The outer diameter is smaller than the inner diameter of the mounting hole and is longer than the hollow portion of the grommet. The outer diameter of the grommet near the flange portion is A, and the inner diameter of the region excluding the convex portion is B. and then, the inner diameter of the mounting hole of the mounting plate is C, when the outer diameter excluding the recess of the shank and the D, the a, B, C and D, the relationship between a-B> C-D When the grommet is attached to the mounting hole and the lower end portion is protruded from the lower surface of the mounting plate, the outer diameter area of the grommet is in contact with the inner surface of the mounting hole, and inside the mounting hole. The outer diameter region is positioned with a predetermined clearance from the inner surface of the mounting hole, and the shaft portion is grommeted. When the grommets are inserted into the recesses of the shaft and the convex portions of the grommets are inserted into the recesses of the shaft, the lower end of the grommets are protruded from the mounting plate, and the grommet is attached to and fixed to the mounting plate. The seal region is formed by being pressed by the shaft portion and pressed against the inner surface of the mounting hole, and the region located inside the mounting hole in the outer diameter of the lower part of the grommet is pressed and expanded by the shaft portion. The area that opens and contacts the inner surface of the mounting hole and protrudes from the mounting plate is pressed by the shaft and the entire area from the edge of the mounting hole to the tip is outside the inner diameter of the mounting hole. and its features that it is expanded toward further when said the grommet is mounted and fixed to the mounting plate, the outer diameter of the distal end portion of the grommet which projects from the mounting plate expansion than the inner diameter of the mounting hole Open In addition, when a force in the direction of pulling out is applied to the shaft portion of the component, the expanded grommet tip portion is further expanded from the insertion portion of the concave portion formed in the shaft portion and the convex portion formed in the grommet. It is characterized by that.

本発明に係る部品の密封取付構造は、下部外周に凹部が形成された軸部を備えた部品の前記軸部を、下部内周に凸部が形成されたゴム製のグロメットを介して取付板に取付ける密封取付構造の前記グロメットの外径をＡ、内径をＢとし、前記の取付板の取付穴の内径をＣとし、前記の軸部の外径をＤとしたとき、上記Ａ，Ｂ，Ｃ及びＤの関係をＡ−Ｂ＞Ｃ−Ｄとし、且つＡ≒Ｃとしたので、部品の軸部をグロメットに挿入すると軸部によってゴム製のグロメットは、軸部と取付板に設けた取付穴の間で圧縮され該取付穴の内周の壁に押し付けられ確実にシールされた状態で固定されるとともに、前記した軸部の下部外周面に形成の凹部がゴム製のグロメットの下部内周面に形成の凸部に嵌入され軸部はグロメットを介して取付板に確実に装着固定され部品が簡単に脱落することがなく安定した状態で取付られるものである。   The sealing mounting structure for a component according to the present invention includes a mounting plate that includes a shaft portion having a shaft portion having a recess formed on the outer periphery of the lower portion, and a rubber grommet having a protrusion formed on the inner periphery of the lower portion. When the outer diameter of the grommet of the sealing mounting structure to be attached to is A, the inner diameter is B, the inner diameter of the mounting hole of the mounting plate is C, and the outer diameter of the shaft portion is D, the A, B, Since the relationship between C and D is AB> C-D and A≈C, when the shaft portion of the part is inserted into the grommet, the rubber grommet is attached to the shaft portion and the mounting plate by the shaft portion. Compressed between the holes, pressed against the inner peripheral wall of the mounting hole and securely fixed in a sealed state, and the recess formed on the lower outer peripheral surface of the shaft portion described above is the lower inner periphery of the rubber grommet Inserted into the convex part formed on the surface, the shaft part is securely attached to the mounting plate via the grommet Those are mounted in a stable state without the constant is part easily falling off.

また、グロメットが取付穴に装着されたとき、該グロメットの取付穴より突出する先端部分は、前記した軸部と取付穴の間での圧縮により前記の先端部分の外径は取付穴の内径より拡開された状態となり、さらに、部品の軸部を抜く方向に力が加わったときには、グロメットの装着時に嵌入されている軸部の凹部とグロメットの凸部の嵌入部分からグロメットの先端部分をさらに大きく押し広げる力が作用し、このため、グロメット及び該グロメットと嵌合状態にある部品の軸部が取付穴から抜け出ることはなく、部品の脱落を完全に防止することができるという格別の効果を奏するものである。   Further, when the grommet is mounted in the mounting hole, the tip portion protruding from the mounting hole of the grommet is compressed between the shaft portion and the mounting hole so that the outer diameter of the tip portion is larger than the inner diameter of the mounting hole. When a force is applied in the direction of pulling out the shaft part of the part, the tip part of the grommet is further moved from the recessed part of the shaft part and the convex part of the grommet inserted when the grommet is attached. The force that pushes greatly acts, so that the shaft part of the grommet and the part fitted with the grommet does not come out of the mounting hole, and it is possible to completely prevent the part from falling off. It is what you play.

本発明の実施の形態を図に基づいて説明する。１は部品であり、該部品１は軸部２を備えており、前記軸部２の下部外周に溝状凹部３が形成されている。４はゴム製の筒状をなすグロメットであり、該グロメット４の上部にはフランジ部５が設けられるとともに下部内周には隆起状の凸部６が形成される。上記した溝状の凹部３及び隆起状の凸部の形状は特に限定されるものでなく、部品１の軸部２がグロメット4に挿入されたとき凸部6に凹部３が嵌合可能な形状であれば如何様な形状であってもよい。  Embodiments of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a component. The component 1 includes a shaft portion 2, and a groove-like recess 3 is formed on the outer periphery of the lower portion of the shaft portion 2. Reference numeral 4 denotes a rubber grommet. A flange portion 5 is provided on the upper portion of the grommet 4 and a raised convex portion 6 is formed on the inner periphery of the lower portion. The shape of the groove-like recess 3 and the raised protrusion is not particularly limited, and the recess 3 can be fitted into the protrusion 6 when the shaft 2 of the component 1 is inserted into the grommet 4. Any shape can be used.

グロメット４の本体部７の外径（最大外径）をＡ、内径をＢとし、前記した筒状のグロメット４の先端部分８の外径を前記した外径Ａよりも若干小径とするのがよく、このように形成することにより後記する取付穴に装着するときにグロメット４の初期の挿入を容易とすることができるものである。  The outer diameter (maximum outer diameter) of the main body portion 7 of the grommet 4 is A, the inner diameter is B, and the outer diameter of the tip portion 8 of the cylindrical grommet 4 is slightly smaller than the outer diameter A described above. Well, by forming in this way, the initial insertion of the grommet 4 can be facilitated when mounting in a mounting hole described later.

９は部品１を取付ける取付板であり、該取付板９にはグロメット４を装着するための取付穴１０が設けられている。そして該取付穴１０の内径Ｃは、前記したグロメット４の最大外径Ａとほぼ等しい寸法（Ａ≒Ｃ）としてある。このため、グロメット４を取付穴１０に通す際には大きな力を要することなく容易に装着できるようにしている。  Reference numeral 9 denotes a mounting plate for mounting the component 1, and the mounting plate 9 is provided with a mounting hole 10 for mounting the grommet 4. The inner diameter C of the mounting hole 10 is a dimension (A≈C) that is substantially equal to the maximum outer diameter A of the grommet 4 described above. Therefore, when the grommet 4 is passed through the mounting hole 10, it can be easily mounted without requiring a large force.

前記した部品１の軸部２の外形をＤとしたとき、本実施の態様においては、グロメット４の外径Ａ及び内径Ｂと取付穴１０の内径Ｃと部品１の軸部２の外径Ｄの寸法関係を、Ａ−Ｂ＞Ｃ−Ｄの関係に形成し、且つ、Ａ≒Ｃに形成している。   In the present embodiment, the outer diameter A and inner diameter B of the grommet 4, the inner diameter C of the mounting hole 10, and the outer diameter D of the shaft portion 2 of the component 1, where D is the outer shape of the shaft portion 2 of the component 1 described above. Are formed such that AB> CD, and A≈C.

本実施の態様における部品１の取付け手順は、先にグロメット４を取付板９の取付穴１０に該グロメット４の先端部分８より挿入するが、本実施の態様においては、前記のグロメット４の先端部分８の外径をグロメット４の最大外径Ａよりも若干小径としているのでグロメット４の取付穴１０への初期の挿入は円滑に実施することができ、さらに、取付穴１０の内径Ｃとグロメット４の最大外径Ａとはほぼ等しく構成（Ａ≒Ｃ）しているので、グロメット４を取付穴１０に通すときには大きな力を要することなく容易に取付けることができるものである。   In the mounting procedure of the component 1 in this embodiment, the grommet 4 is first inserted into the mounting hole 10 of the mounting plate 9 from the tip portion 8 of the grommet 4. In this embodiment, the tip of the grommet 4 is inserted. Since the outer diameter of the portion 8 is slightly smaller than the maximum outer diameter A of the grommet 4, the initial insertion of the grommet 4 into the mounting hole 10 can be performed smoothly, and further, the inner diameter C of the mounting hole 10 and the grommet. 4 is substantially equal to the maximum outer diameter A (A≈C). Therefore, when the grommet 4 is passed through the mounting hole 10, it can be easily mounted without requiring a large force.

グロメット４を取付板９の取付穴１０に挿入し、該グロメット４のフランジ部５が取付板９に当接するまで該グロメット４を挿入し、グロメット４の先端部分８が取付板９より突出された状態で取付板９に装着した後、部品１の軸部２を前記グロメット４に挿入すると、ゴム製のグロメット４の本体部７は、前述したようにこれらの寸法関係がＡ−Ｂ＞Ｃ−Ｄで且つＡ≒Ｃとされているので、ゴム製のグロメット４は、部品１の軸部２と取付穴１０の内周間で圧縮されてゴム製のグロメット４の本体部７が取付穴１０の内周の壁に押し付けられて取付穴１０に固定されるとともに前記の押し付けによりゴム製のグロメット４により軸部２と取付穴１０の間を確実にシールすることができる。   The grommet 4 is inserted into the mounting hole 10 of the mounting plate 9, and the grommet 4 is inserted until the flange portion 5 of the grommet 4 comes into contact with the mounting plate 9, and the tip portion 8 of the grommet 4 protrudes from the mounting plate 9. When the shaft portion 2 of the component 1 is inserted into the grommet 4 after being mounted on the mounting plate 9 in a state, the main body portion 7 of the rubber grommet 4 has a dimensional relationship of AB> C- as described above. Since D and A≈C, the rubber grommet 4 is compressed between the shaft portion 2 of the component 1 and the inner periphery of the mounting hole 10 so that the main body portion 7 of the rubber grommet 4 is attached to the mounting hole 10. The shaft 2 and the mounting hole 10 can be reliably sealed by the rubber grommet 4 by the pressing.

また、グロメット４を取付板９に装着するとき該グロメット４の先端部分８が取付穴１０の下方に突出するように構成されるが、前記したグロメット４の先端部分８は、該グロメット４の本体部７が軸部２と取付穴１０の間で圧縮されることにより前記取付穴１０の下方に突出されるグロメット４の先端部分８の外径Eは取付穴１０の内径Cよりも大きくなるように広がった状態となる（Ｅ＞Ｃ）。   Further, when the grommet 4 is attached to the mounting plate 9, the front end portion 8 of the grommet 4 is configured to protrude below the mounting hole 10. The front end portion 8 of the grommet 4 is the main body of the grommet 4. When the portion 7 is compressed between the shaft portion 2 and the mounting hole 10, the outer diameter E of the tip end portion 8 of the grommet 4 protruding below the mounting hole 10 is larger than the inner diameter C of the mounting hole 10. (E> C).

上記したようにゴム製のグロメット４の先端部分８が取付穴１０の内径よりも大きく広がった状態でグロメット４が取付板９に装着された状態で部品１を抜く方向に力が加わった場合、部品１の軸部２の下部外周に形成の溝状凹部３がグロメット４の下部内周に形成の突状の凸部６に嵌入する部分からグロメット４の取付穴１０より突出する先端部分８を更に大きく押し広げる力が作用し、このため、グロメット４及び該グロメット４と嵌入状態にある部品１の軸部２が取付穴１０から抜けることはなく、部品の脱落を確実に防止することができるばかりでなく、軸部２と取付穴１０の間はゴム製のグロメット４により確実なシール性が保持されることになる。   When a force is applied in the direction in which the component 1 is pulled out with the grommet 4 mounted on the mounting plate 9 with the tip 8 of the rubber grommet 4 extending larger than the inner diameter of the mounting hole 10 as described above, A groove-like recess 3 formed on the lower outer periphery of the shaft portion 2 of the component 1 is provided with a tip 8 protruding from the mounting hole 10 of the grommet 4 from a portion where the groove-like recess 3 formed on the lower inner periphery of the grommet 4 is fitted. The force which pushes further greatly acts, and therefore, the grommet 4 and the shaft portion 2 of the component 1 fitted with the grommet 4 do not come out of the mounting hole 10, so that the component can be reliably prevented from falling off. In addition, a reliable sealing performance is maintained between the shaft portion 2 and the mounting hole 10 by the rubber grommet 4.

上記したように、本実施の態様においては、部品１の軸部２の外径、ゴム製グロメット４の最大外径、内径及び取付板９に設けられる取付穴１０の内径寸法をそれぞれ関連規定することによって部品の軸部と取付穴との間を前記のゴム製グロメットにより確実にのシールした状態で部品が簡単に脱落することなく安定して取付けられる構造を実現することができたものである。   As described above, in the present embodiment, the outer diameter of the shaft portion 2 of the component 1, the maximum outer diameter of the rubber grommet 4, the inner diameter, and the inner diameter dimension of the mounting hole 10 provided in the mounting plate 9 are respectively defined. As a result, it was possible to realize a structure in which the component can be stably mounted without easily falling off with the rubber grommet securely sealed between the shaft portion of the component and the mounting hole. .

本発明の実施の態様による部品の密封取付構造の分解図である。It is an exploded view of the component sealing mounting structure by the embodiment of this invention. 本発明の実施の態様による部品の取付状態を示す説明図である。It is explanatory drawing which shows the attachment state of the components by the embodiment of this invention.

符号の説明Explanation of symbols

１ 部品
２ 部品の軸
３ 凹部
４ グロメット
６ 凸部
９ 取付板
１０ 取付穴 DESCRIPTION OF SYMBOLS 1 Part 2 Part axis | shaft 3 Concave part 4 Grommet 6 Convex part 9 Mounting plate 10 Mounting hole

Claims (2)

下部外周に凹部が形成された軸部を備えた部品を、下部内周面に凸部が形成されたゴム製のグロメットを介して取付板に取付ける部品の密封取付構造において、
取付板は、グロメットを介して軸部を取り付ける取付穴が形成されており、
グロメットは、上端にフランジ部を有し、その上端の面部から本体部の下端の面部にわたって貫通した中空部が形成されて、前記取付穴に装着される筒状の本体部を含み、
本体部の筒長さは、前記取付板の上面にフランジ部が当接して取付穴に装着された際に、取付板の下面から突出する長さをもって形成されており、
本体部のフランジ部寄りの外径は、前記取付穴の内径と略等しく形成され、かつ本体部の下部の外径は、取付板の取付穴の内径よりも小径に形成されており、
本体部の下部内周面の凸部を除いた領域の内径は、軸部の外径よりも小径に形成されており、
軸部は、取付板の取付穴の内径よりも小径な外径で、かつ、グロメットの中空部よりも長尺に形成されており、
前記グロメットにおけるフランジ部寄りの外径をＡ、凸部を除いた領域の内径をＢとし、
前記取付板の取付穴の内径をＣとし、
前記の軸部の凹部を除く外径をＤとしたとき、
前記Ａ，Ｂ，Ｃ及びＤは、Ａ−Ｂ＞Ｃ−Ｄの関係を有しており、
前記取付穴にグロメットを装着し、下部の先端部分を取付板の下面より突出させたとき、グロメットの外径の領域は、取付穴の内面に接触し、取付穴の内部に配される外径の領域は、取付穴の内面との間に所定の隙間をもって位置しており、
前記軸部をグロメットに挿入せしめるとともに、軸部の凹部にグロメットの凸部を嵌入せしめ、前記グロメットの下部の先端部分を取付板より突出させてグロメットを取付板に装着固定したとき、グロメットの外径の領域は、軸部により押圧されて取付穴の内面に押し付けられることでシール領域を形成し、
グロメットの下部の外径のうち、取付穴の内部に位置している領域は、軸部により押圧されて拡開して取付穴の内面に接触し、取付板より突出している領域は、軸部によって押圧されて取付穴の端縁から先端部にいたるまでの全域が前記取付穴の内径よりも外方に向けて拡開していることを特徴とする部品の密封取付構造。 In the sealing mounting structure of the component that is attached to the mounting plate via a rubber grommet having a convex portion formed on the lower inner peripheral surface, a component having a shaft portion having a concave portion formed on the lower outer periphery,
The mounting plate has a mounting hole for mounting the shaft through the grommet.
The grommet has a flange portion at the upper end, a hollow portion penetrating from the upper end surface portion to the lower end surface portion of the main body portion is formed, and includes a cylindrical main body portion attached to the mounting hole,
The cylinder length of the main body is formed with a length protruding from the lower surface of the mounting plate when the flange portion comes into contact with the upper surface of the mounting plate and is mounted in the mounting hole .
The outer diameter of the main body portion near the flange portion is formed substantially equal to the inner diameter of the mounting hole, and the outer diameter of the lower portion of the main body portion is formed smaller than the inner diameter of the mounting hole of the mounting plate ,
The inner diameter of the region excluding the convex portion of the lower inner peripheral surface of the main body is formed to be smaller than the outer diameter of the shaft portion,
The shaft portion has an outer diameter smaller than the inner diameter of the mounting hole of the mounting plate, and is longer than the hollow portion of the grommet,
The outer diameter of the grommet near the flange portion is A, and the inner diameter of the region excluding the convex portion is B.
The inner diameter of the mounting hole of the mounting plate is C,
When the outer diameter excluding the concave portion of the shaft portion is D,
Wherein A, B, C and D has a relation of A-B> C-D,
When the grommet is attached to the mounting hole and the lower end portion is protruded from the lower surface of the mounting plate, the outer diameter area of the grommet is in contact with the inner surface of the mounting hole and the outer diameter disposed inside the mounting hole. The area of is located with a predetermined gap between the inner surface of the mounting hole,
When the shaft part is inserted into the grommet and the convex part of the grommet is inserted into the concave part of the shaft part, the lower end of the grommet protrudes from the mounting plate, and the grommet is attached and fixed to the mounting plate. The area of the diameter is pressed by the shaft and pressed against the inner surface of the mounting hole to form a seal area,
Of the outer diameter of the lower part of the grommet, the region located inside the mounting hole is pressed and expanded by the shaft part to contact the inner surface of the mounting hole, and the region protruding from the mounting plate is the shaft part A structure for sealing and mounting a component, wherein the entire region from the edge of the mounting hole to the tip is expanded outward from the inner diameter of the mounting hole . グロメットが取付板に装着固定されたとき、取付板より突出する該グロメットの先端部分の外径は前記取付穴の内径よりも拡開するとともに、部品の軸部に抜く方向の力が加わったとき、軸部に形成の凹部とグロメットに形成の凸部の嵌入部分から前記したグロメットの拡開された先端部分がさらに大きく広がるように構成したことを特徴とする請求項１記載の部品の密封取付構造。 When the grommet is mounted and fixed to the mounting plate, the outer diameter of the tip of the grommet protruding from the mounting plate is larger than the inner diameter of the mounting hole, and when a force in the direction of pulling is applied to the shaft of the component 2. The hermetic mounting of a component according to claim 1, wherein the expanded tip portion of the grommet is further expanded from the insertion portion of the concave portion formed in the shaft portion and the convex portion formed in the grommet. Construction.
JP2007190742A 2007-07-23 2007-07-23 Sealed mounting structure for parts Active JP4784837B2 (en)

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