JP3794607B2 - Grommet - Google Patents

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Publication number
JP3794607B2
JP3794607B2 JP21662599A JP21662599A JP3794607B2 JP 3794607 B2 JP3794607 B2 JP 3794607B2 JP 21662599 A JP21662599 A JP 21662599A JP 21662599 A JP21662599 A JP 21662599A JP 3794607 B2 JP3794607 B2 JP 3794607B2
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JP
Japan
Prior art keywords
cup
panel
grommet
hole
sealing wall
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JP21662599A
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Japanese (ja)
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JP2001041359A (en
Inventor
一弘 池田
文裕 柴原
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Toyota Industries Corp
Yazaki Corp
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Toyota Industries Corp
Yazaki Corp
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Priority to JP21662599A priority Critical patent/JP3794607B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、ワイヤハーネスをパネルの孔部に挿通する際に使用される防水用の弾性のグロメットに係り、パネルの孔部にカップ部の後部側から容易に挿入し得るようにしたものである。
【0002】
【従来の技術】
図3は従来のグロメットの一例を示すものである。
このグロメット31は合成ゴムで形成され、車両のパネル13の円形の孔部14に嵌合するカップ部32と、カップ部32を貫通して形成された筒状部33と、筒状部33に続き、カップ部32の内側に反転して収容された防音膜34とを備えている。筒状部33にはワイヤハーネス26が挿通固定され、カップ部32はパネル13の孔部14を塞いで、パネル13の外側から内側への水や塵の侵入を防止する。
【0003】
カップ部32は厚肉の周壁35と、筒状部33に直交するやや薄肉の封止壁36とで構成され、周壁35の外周に、パネル13に対する嵌着溝37が設けられ、周壁35の後端から外向きに鍔状のシールリップ38が突出形成されている。本明細書ではカップ部31の開口39側を後部側と定義する。
【0004】
周壁35は封止壁36側から嵌着溝37にかけて略テーパ状に肉厚を増し、嵌着溝37からシールリップ38にかけては真直な厚肉の裾部40となっている。裾部40の外径は傾斜状の肩部41の外径よりも大きく、嵌着溝37の一側面は他側面よりも大径に形成されて、パネル13を肩部41側から確実に当接可能となっている。肩部41の外周には、パネル13との摺動抵抗を軽減させるための断面鋸歯状の突条42が複数形成されている。
【0005】
シールリップ38は裾部40の後端から湾曲して鍔状に形成され、薄肉で前方向への可撓性を有している。防音膜34はカップ部32を通じて室外の音が室内に侵入するのを防止するためのものであり、カップ部32内に環状の中空層43を構成している。
【0006】
筒状部33の一方は防音膜34の屈曲部に続き、筒状部33の他方はカップ部32の封止壁36から前方に突出して、ワイヤハーネス26をビニルテープで巻回固定する小径部44に続いている。ワイヤハーネス26はグロメット31をパネル13に装着する前にグロメット31内に挿通される。
【0007】
一般的にグロメット31をパネル13の孔部14に嵌着させるには、パネル13の後方から孔部14に筒状部33を通し、パネル13の前側から筒状部33を引っ張って(この際、ワイヤハーネス44が挿通されているから、筒状部33が潰れることはない)、カップ部32の肩部41をパネル13の孔部14に摺接させつつ、図3の如く嵌着溝37を孔部14の周縁に嵌合させる。シールリップ38はパネル側の例えば防音材15の表面に密着する。
【0008】
【発明が解決しようとする課題】
しかしながら、パネル13の後側にグロメット31を仮置きするスペースがない場合や、部品組付上、パネル13の前側からしかグロメット31をパネル13に組み付けることができない場合には、図4の如くグロメット31を斜めにした状態で、カップ部32の後端側からパネル13の孔部14に挿入し、パネル13の前方にはみ出したカップ部32の厚肉の裾部40を手で潰しながらカップ部全体をパネル13の後方に入れ、次いで筒状部33を前方に引っ張ることで、孔部14の周縁を嵌着溝37に嵌合させる。
【0009】
この作業において、上記従来のグロメット31は、カップ部32の剛性が高いために、カップ部32を手で潰しながらパネル13の孔部14に挿入する作業や、孔部14に嵌着溝37を嵌合させる作業が大変であった。
【0010】
また、図4の如く、グロメット31を傾けてカップ部32の一側方をパネル13の孔部14内に挿入した際に、孔部14の周縁がカップ部32の他側方の厚肉の裾部40やシールリップ38に干渉しやすく、カップ部32やシールリップ38が傷付きやすいという問題もあった。シールリップ38が傷付いた場合は、防水性や遮音性が悪くなるという懸念があった。また、カップ部32の後部を孔部14に挿入した後、筒状部33を引っ張ってカップ部32の外周を孔部14の周縁に摺接させた際に、カップ部32の剛性が高いために、カップ部32の外周が傷付きやすいという問題もあった。
【0011】
本発明は、上記した点に鑑み、カップ部をパネルの孔部に挿入して嵌着させる作業を容易に、しかもカップ部やシールリップ部に傷を付けることなく確実に行うことができるグロメットを提供することを目的とする。
【0012】
【課題を解決するための手段】
上記目的を達成するために、本発明は、ワイヤハーネスを挿通する筒状部と、該筒状部の外側に続き、パネルの孔部に嵌着する大径のカップ部とを備える弾性のグロメットにおいて、前記パネルの一方の面側に位置する厚肉の裾部に、グロメット軸方向に延びる溝部が形成されたことを特徴とする(請求項1)。前記溝部が断面V字状に形成されたことも有効である(請求項2)。
また、前記カップ部が、前記筒状部に交差して縮径方向の可撓性を有する前側の封止壁と、後側の前記裾部とを備え、該パネルの孔部に該カップ部を該裾部側から挿入する際に、前記溝部と該封止壁とによって該カップ部が縮径されることも有効である(請求項3)。
また、前記封止壁が断面略S字状に屈曲形成されたことも有効である(請求項4)。また、前記封止壁に続く前記カップ部の肩部の内周面側が湾曲状に肉抜きされたことも有効である(請求項5)。
【0013】
【発明の実施の形態】
以下に本発明の実施の形態の具体例を図面を用いて詳細に説明する。
図1は、本発明に係るグロメットの一実施形態を示すものである。
【0014】
このグロメット1は従来のグロメットに較べて三つの特徴を有している。先ず、第一にカップ部2の封止壁3が断面略S字状に屈曲して形成されている。第二に、封止壁3に続くカップ部2の肩部4の内周側が抉られて湾曲形状に肉抜き(5)されている。第三に、カップ部2の周壁6の後部側の厚肉の裾部7の後端面7a側に断面V字状の溝部8が環状に形成されている。
【0015】
カップ部2の封止壁3は従来よりもやや薄肉に形成され、封止壁3の基部は筒状部9に対してやや前向きに傾斜して交差し、交差部10から後方に小さく湾曲して続き、この小さな第一湾曲部(可撓部)11は、前方に大きく湾曲した第二湾曲部(可撓部)12に続き、両湾曲部11,12で断面略S字状の可撓性の封止壁3を構成し、第二湾曲部12は肩部4に続いている。
【0016】
交差部10において筒状部9は内側に厚肉に形成され、この厚肉部25によって剛性が付与されている。肩部4の外周側は略テーパ状に、正確にはやや湾曲して、パネル13に対する嵌着溝16に続いている。肩部4の外周には従来同様に、パネル13の孔部14の周縁との摺動抵抗を軽減させるための複数の突条17が形成されている。カップ部2の肩部4の内周側は、従来例(図3)と比較すると明らかな如く、肉抜き部5によって大きく湾曲状に抉られており、それによって肩部4が薄肉化されている。断面略S字状の封止壁3の内面と肩部4の内面とは肉抜き部5によって滑らかに繋がっている。
【0017】
断面略S字状の可撓性の封止壁3によってカップ部2の周壁6が径方向に縮み可能であり、肩部4の肉抜き部5によって、肩部4の柔軟性が増し、肩部4が潰れ方向に変形しやすくなる。肉抜き部5は、封止壁3の第二湾曲部12の内面を大きく湾曲形成するためにも必要であり、肉抜き部5があることで、封止壁3の外径を大きくせずに、封止壁3を断面略S字状に湾曲形成することができる。断面略S字状の封止壁3と肩部4の肉抜き部5との共働作用でカップ部2の縮径動作が容易化する。
【0018】
肉抜き部5はほぼ嵌着溝16の内側位置まで続いている。嵌着溝16は、肩部4の外周面に続く短い一側面16aと、一側面16aに対向する長い他側面16bとを有し、他側面16bは肩部4に対して段差をもって厚肉の裾部7の外周面7bに続いている。裾部7の外周面7bはややテーパ状に裾広がりに傾斜して後端側の鍔状のシールリップ18の前面に続いている。シールリップ18は従来同様に基部18a側が後方に湾曲して突出し、先端18b側がパネル13側の防音材15に対してほぼ平行に位置する。
【0019】
シールリップ18の後面は裾部7の後端面7aに続いている。裾部7の後端面7aから嵌着溝16に向けて裾部7の中間部まで断面V字状の溝部8が環状に形成されている。溝部8は対向する側面8aを有している。裾部7は溝部8によって径方向に二分された形となっている。溝部8の底部8bはV字の底の如く狭くなっており、底部8bから溝部8の開口8c側にかけてテーパ状に拡幅されている。溝部8の開口8cが裾部7の後端面7aに位置している。
【0020】
溝部8の深さは、裾部7の後端面7aから嵌着溝16の幅広の側面16bまでの距離のほぼ半分程度である。裾部7の後端面7aから嵌着溝16の側面16bまでの部分19が撓み支点となり、裾部7が断面V字状の溝部8を潰す方向すなわち板厚方向(グロメット径方向)に縮径可能である。
【0021】
本実施形態のグロメット1のその他の部分の構成については本発明の特徴部分ではないが一応説明する。
カップ部2の裾部7は内周面側においてグロメット軸方向に薄肉に延長されて、防音膜20の屈曲部21に対する保護壁23となっている。防音膜20はカップ部2内に反転した状態で収容され、反転部22はテーパ状に厚肉に形成され、この剛性化により抜け出しが防止されている。これらの構成は別件で提案する。
【0022】
防音膜20の屈曲部21は傾斜部24を経てカップ部2内の筒状部9に続き、筒状部9はカップ部2から前方に突出延長されて、ワイヤハーネス26を密着固定する小径部27に続いている。カップ部2の嵌着溝16はパネル13の孔部14の周縁に係合可能であり、シールリップ18はパネル13と一体の防音材15の面に密着可能である。
【0023】
上記グロメット1をパネル13の孔部14に装着する際には、図2に示す如く、カップ部2を径方向に大きく縮めて、カップ部2の後部側からパネル13の孔部14に挿入する。カップ部2は断面略S字状の湾曲部11,12(図1)と肉抜き部5との相乗効果で封止壁3から容易に潰れることができる。すなわち、第二湾曲部12が前方に突出しているから、第二湾曲部12の頂部を支点として第一湾曲部11と肩部4とが縮径方向に移動しつつ相互に近接し、カップ部2の肩部4が小さな力で径方向に窄まってカップ部全体が小径化する。
【0024】
これにより、孔部14に対する摩擦力が低減してカップ部2の挿入性が高まり、挿入作業が容易化すると共に、孔部14の周縁14aに対するカップ部2の擦れが小さくなり、カップ部2の外周の傷付きが防止される。。
【0025】
また、カップ部2の後部側の厚肉の裾部7を径方向(内向き)に押圧することにより、断面V字状の溝部8が潰れて裾部7が小径化する。前述の如くカップ部全体が小径化した上に裾部7が縮径されるから、シールリップ18を密着させた状態の裾部7の外径Dや、シールリップ18から封止壁3の基部までの距離(高さ)Hが大きく狭められる。これによっても孔部14へのカップ部2の後部側の挿入性が高まり、挿入作業が容易化すると共に、孔部14の周縁14aに対するシールリップ18の擦れが小さくなり、シールリップ18の傷付きが防止される。
【0026】
図2と従来例の図4との対比で明らかなように、カップ部全体が縮径し、且つ裾部7が縮径することで、図2の如くカップ部2の一側方を前方から孔部14に挿入した時点で、カップ部2の他側方は孔部14の周縁14aと同一位置にあり、相互の干渉が極めて小さくなる。これによってもシールリップ18や裾部7の傷付きが防止される。
【0027】
また、図1において裾部7の外周面7をややテーパ状に形成したことで、図2の如くシールリップ18を裾部7の外周面7に密着させた際に、シールリップ18の基部(付根)18a側の湾曲が小さくなり、基部18a側の突出量が小さくなる。これによっても、パネル13の孔部14の周縁14aに対してシールリップ18が干渉しにくくなり、シールリップ18の傷付きが防止される。
【0028】
従来同様に、カップ部2の後部側からパネル13の孔部14に挿入した後、前側の筒状部9を持ってグロメット1を前方に引っ張ることで、嵌着溝16がパネル13の孔部14に嵌合する。
【0029】
なお、前記断面略S字状の封止壁3に代えて断面波型状や断面略V字状の封止壁(図示せず)を用いることも可能である。但し、断面略S字状の封止壁3を用いた場合には、他の実施形態の封止壁よりも復元性に優れ、且つ封止壁3の径方向の肥大化が防止される。復元力は第一湾曲部11によっても発揮される。
【0030】
また、前記断面V字状の溝部8に代えて断面U字状の溝部(図示せず)を用いることも可能である。但し、断面V字状の溝部8は断面U字状の溝部に較べて裾部7を相互に完全密着させることができ、裾部7をより縮径させやすい。
【0031】
また、カップ部2の断面略S字状の封止壁3と肉抜き部5とを備えたグロメット(この場合、溝部8はない)をパネル13の孔部14に対して後方から前方に挿入する場合でも、カップ部2が縮径することで、挿入及び装着作業を容易且つ確実に行うことができる。また、防音膜20のないグロメットにも本発明の特徴部分を適用することができる。
【0032】
【発明の効果】
以上の如く、請求項1記載の発明によれば、厚肉の裾部を径方向に押圧することで、溝部が潰れ、裾部を小さな力で容易に縮径させることができるから、裾部側すなわち後端側からパネルの孔部に挿入する場合に挿入作業を容易且つ確実に行うことができる。
【0033】
また、請求項2記載の発明によれば、裾部を径方向に押圧して溝部が潰れた際に、断面V字状の溝部の対向する両側面が隙間なく密着するから、裾部が確実に小径化され、前記挿入作業が一層容易化される。
【0034】
また、請求項3記載の発明によれば、グロメットをパネルの孔部に挿入する際に、カップ部の厚肉の裾部を径方向に押圧することで、溝部が潰れ、裾部を小さな力で容易に縮径させることができ、且つカップ部を付根側の封止壁側から小さな力で容易に縮径させることができるから、カップ部を裾部側すなわち後端側からパネルの孔部に挿入する場合に挿入作業を容易且つ確実に行うことができる。
【0035】
また、請求項4記載の発明によれば、断面略S字状の封止壁によって縮径時に撓みを確実に吸収でき、効率的に縮径できると共に、パネル挿入後の復元性に優れ、カップ部を確実にパネルの孔部に密着固定させることができる。
【0036】
また、請求項5記載の発明によれば、肉抜きによって肩部の柔軟性が増し、パネルの孔部への挿入時に肩部が容易に撓んで挿入性が向上する。特に、可撓性の封止壁との相乗効果でカップ部の可撓性が増し、カップ部の縮径が効率良く且つ確実に行われるから、挿入作業性が一層向上する。
【図面の簡単な説明】
【図1】本発明に係るグロメットの一実施形態を示す自由状態における縦断面図である。
【図2】グロメットを後部側からパネルの孔部に挿入する状態を示す縦断面図である。
【図3】従来のグロメットを示す縦断面図である。
【図4】同じくグロメットを後部側からパネルの孔部に挿入する状態を示す縦断面図である。
【符号の説明】
1 グロメット
2 カップ部
3 封止壁
4 肩部
5 肉抜き部
7 裾部
8 溝部
9 筒状部
13 パネル
14 孔部
26 ワイヤハーネス
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elastic grommet for waterproofing used when a wire harness is inserted into a hole of a panel, and can be easily inserted into the hole of the panel from the rear side of the cup. .
[0002]
[Prior art]
FIG. 3 shows an example of a conventional grommet.
The grommet 31 is made of synthetic rubber, and includes a cup portion 32 that fits into the circular hole portion 14 of the vehicle panel 13, a tubular portion 33 that is formed through the cup portion 32, and a tubular portion 33. Subsequently, a soundproof film 34 that is inverted and accommodated inside the cup portion 32 is provided. The wire harness 26 is inserted and fixed in the cylindrical portion 33, and the cup portion 32 closes the hole portion 14 of the panel 13 to prevent water and dust from entering from the outside to the inside of the panel 13.
[0003]
The cup portion 32 is composed of a thick peripheral wall 35 and a slightly thin sealing wall 36 orthogonal to the cylindrical portion 33, and a fitting groove 37 for the panel 13 is provided on the outer periphery of the peripheral wall 35. A hook-like seal lip 38 is formed to project outward from the rear end. In this specification, the opening 39 side of the cup part 31 is defined as the rear side.
[0004]
The peripheral wall 35 has a substantially tapered thickness from the sealing wall 36 side to the fitting groove 37, and has a straight thick skirt 40 from the fitting groove 37 to the seal lip 38. The outer diameter of the hem 40 is larger than the outer diameter of the inclined shoulder 41, and one side of the fitting groove 37 is formed to have a larger diameter than the other side, so that the panel 13 can be reliably abutted from the shoulder 41 side. It is possible to contact. On the outer periphery of the shoulder portion 41, a plurality of protrusions 42 having a sawtooth cross section for reducing sliding resistance with the panel 13 are formed.
[0005]
The seal lip 38 is curved from the rear end of the skirt 40 and is formed in a bowl shape, and is thin and flexible in the forward direction. The soundproof film 34 is for preventing outdoor sounds from entering the room through the cup portion 32, and an annular hollow layer 43 is formed in the cup portion 32.
[0006]
One of the cylindrical portions 33 follows the bent portion of the soundproof film 34, the other of the cylindrical portions 33 protrudes forward from the sealing wall 36 of the cup portion 32, and a small diameter portion that winds and fixes the wire harness 26 with vinyl tape. 44. The wire harness 26 is inserted into the grommet 31 before the grommet 31 is attached to the panel 13.
[0007]
Generally, in order to fit the grommet 31 into the hole 14 of the panel 13, the tubular portion 33 is passed through the hole 14 from the rear of the panel 13 and the tubular portion 33 is pulled from the front side of the panel 13 (at this time). Since the wire harness 44 is inserted, the cylindrical portion 33 is not crushed), and the fitting groove 37 as shown in FIG. 3 while the shoulder portion 41 of the cup portion 32 is brought into sliding contact with the hole portion 14 of the panel 13. Is fitted to the periphery of the hole 14. The seal lip 38 is in close contact with, for example, the surface of the soundproof material 15 on the panel side.
[0008]
[Problems to be solved by the invention]
However, when there is no space for temporarily placing the grommet 31 on the rear side of the panel 13 or when the grommet 31 can be assembled to the panel 13 only from the front side of the panel 13 in terms of parts assembly, the grommet as shown in FIG. The cup portion 32 is inserted into the hole portion 14 of the panel 13 from the rear end side of the cup portion 32 while the 31 is inclined, and the thick hem portion 40 of the cup portion 32 protruding to the front of the panel 13 is crushed by hand. The whole is put behind the panel 13, and then the cylindrical portion 33 is pulled forward, so that the periphery of the hole portion 14 is fitted into the fitting groove 37.
[0009]
In this work, since the conventional grommet 31 has a high rigidity of the cup part 32, the cup part 32 is inserted into the hole part 14 of the panel 13 while the cup part 32 is crushed by hand, or the fitting groove 37 is formed in the hole part 14. The mating work was difficult.
[0010]
Further, as shown in FIG. 4, when the grommet 31 is tilted and one side of the cup portion 32 is inserted into the hole portion 14 of the panel 13, the peripheral edge of the hole portion 14 is thick on the other side of the cup portion 32. There is also a problem that the cup portion 32 and the seal lip 38 are easily damaged due to interference with the skirt portion 40 and the seal lip 38. When the seal lip 38 is damaged, there is a concern that the waterproof property and the sound insulating property are deteriorated. In addition, after inserting the rear part of the cup part 32 into the hole part 14, when the tubular part 33 is pulled to bring the outer periphery of the cup part 32 into sliding contact with the periphery of the hole part 14, the rigidity of the cup part 32 is high. In addition, there is a problem that the outer periphery of the cup portion 32 is easily damaged.
[0011]
In view of the above-described points, the present invention provides a grommet capable of easily performing the operation of inserting and fitting the cup portion into the hole portion of the panel without causing damage to the cup portion or the seal lip portion. The purpose is to provide.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an elastic grommet comprising a cylindrical portion through which a wire harness is inserted, and a large-diameter cup portion that fits outside the cylindrical portion and fits into a hole in the panel. In the present invention , a groove portion extending in the grommet axial direction is formed in a thick hem portion located on one surface side of the panel (Claim 1). It is also effective that the groove is formed in a V-shaped cross section (Claim 2).
The cup portion includes a front sealing wall that intersects the cylindrical portion and has flexibility in a diameter reducing direction, and the rear hem portion, and the cup portion is formed in a hole portion of the panel. It is also effective to reduce the diameter of the cup part by the groove part and the sealing wall when inserting the base part from the skirt side (Claim 3).
It is also effective that the sealing wall is bent to have a substantially S-shaped cross section (Claim 4). It is also effective that the inner peripheral surface side of the shoulder portion of the cup portion following the sealing wall is cut into a curved shape (Claim 5).
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Specific examples of embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows an embodiment of a grommet according to the present invention.
[0014]
This grommet 1 has three features compared to the conventional grommet. First, the sealing wall 3 of the cup part 2 is formed to be bent in a substantially S-shaped cross section. Secondly, the inner peripheral side of the shoulder portion 4 of the cup portion 2 subsequent to the sealing wall 3 is rolled and thinned (5) into a curved shape. Thirdly, a groove portion 8 having a V-shaped cross section is formed in an annular shape on the rear end face 7a side of the thick skirt portion 7 on the rear side of the peripheral wall 6 of the cup portion 2.
[0015]
The sealing wall 3 of the cup portion 2 is formed to be slightly thinner than before, and the base portion of the sealing wall 3 intersects with the cylindrical portion 9 with a slight forward inclination and is curved slightly backward from the intersection portion 10. The small first bending portion (flexible portion) 11 continues to the second bending portion (flexible portion) 12 that is largely bent forward, and the bending portions 11 and 12 have a substantially S-shaped cross section. The second curved portion 12 continues to the shoulder portion 4.
[0016]
At the intersection 10, the cylindrical portion 9 is formed thick on the inside, and rigidity is provided by the thick portion 25. The outer peripheral side of the shoulder 4 is substantially tapered and is slightly curved, and continues to the fitting groove 16 for the panel 13. A plurality of protrusions 17 for reducing sliding resistance with the peripheral edge of the hole 14 of the panel 13 are formed on the outer periphery of the shoulder portion 4 as in the prior art. As apparent from the comparison with the conventional example (FIG. 3), the inner peripheral side of the shoulder portion 4 of the cup portion 2 is greatly curved by the thinned portion 5, thereby reducing the thickness of the shoulder portion 4. Yes. The inner surface of the sealing wall 3 having a substantially S-shaped cross section and the inner surface of the shoulder portion 4 are smoothly connected by the thinned portion 5.
[0017]
The peripheral wall 6 of the cup portion 2 can be contracted in the radial direction by the flexible sealing wall 3 having a substantially S-shaped cross section, and the flexibility of the shoulder portion 4 is increased by the cutout portion 5 of the shoulder portion 4. The part 4 is easily deformed in the crushing direction. The lightening portion 5 is also necessary for greatly bending the inner surface of the second bending portion 12 of the sealing wall 3, and the presence of the lightening portion 5 does not increase the outer diameter of the sealing wall 3. In addition, the sealing wall 3 can be curved and formed in a substantially S-shaped cross section. The diameter reducing operation of the cup portion 2 is facilitated by the cooperative action of the sealing wall 3 having a substantially S-shaped cross section and the hollow portion 5 of the shoulder portion 4.
[0018]
The thinned portion 5 continues substantially to the inner position of the fitting groove 16. The fitting groove 16 has a short one side surface 16 a that follows the outer peripheral surface of the shoulder portion 4 and a long other side surface 16 b that faces the one side surface 16 a, and the other side surface 16 b is thick with a step with respect to the shoulder portion 4. It continues to the outer peripheral surface 7 b of the skirt 7. The outer peripheral surface 7b of the skirt 7 is inclined in a slightly tapered manner so that the skirt spreads, and continues to the front surface of the bowl-shaped seal lip 18 on the rear end side. As in the prior art, the seal lip 18 is curved and protrudes backward on the base 18a side, and the tip 18b side is positioned substantially parallel to the soundproof material 15 on the panel 13 side.
[0019]
The rear surface of the seal lip 18 continues to the rear end surface 7 a of the skirt 7. A groove portion 8 having a V-shaped cross section is formed in an annular shape from the rear end surface 7 a of the skirt portion 7 toward the fitting groove 16 to an intermediate portion of the skirt portion 7. The groove part 8 has the side surface 8a which opposes. The skirt portion 7 has a shape that is bisected by the groove portion 8 in the radial direction. The bottom 8b of the groove 8 is narrow like a V-shaped bottom, and is widened in a taper shape from the bottom 8b to the opening 8c side of the groove 8. The opening 8 c of the groove 8 is located on the rear end surface 7 a of the skirt 7.
[0020]
The depth of the groove 8 is about half of the distance from the rear end surface 7a of the skirt 7 to the wide side surface 16b of the fitting groove 16. A portion 19 from the rear end surface 7a of the skirt 7 to the side surface 16b of the fitting groove 16 serves as a bending fulcrum, and the skirt 7 shrinks in the direction of crushing the groove 8 having a V-shaped cross section, that is, in the plate thickness direction (grommet radial direction). Is possible.
[0021]
Although the structure of the other part of the grommet 1 of this embodiment is not the characteristic part of this invention, it is demonstrated temporarily.
The skirt portion 7 of the cup portion 2 extends thinly in the grommet axis direction on the inner peripheral surface side, and serves as a protective wall 23 for the bent portion 21 of the soundproof film 20. The soundproof film 20 is accommodated in an inverted state in the cup portion 2, and the inversion portion 22 is formed in a tapered shape with a large thickness, and the rigidity is prevented from coming out. These configurations are proposed separately.
[0022]
The bent portion 21 of the soundproof film 20 passes through the inclined portion 24 and continues to the cylindrical portion 9 in the cup portion 2, and the cylindrical portion 9 is projected and extended forward from the cup portion 2, and is a small diameter portion that tightly fixes the wire harness 26. 27. The fitting groove 16 of the cup portion 2 can be engaged with the peripheral edge of the hole portion 14 of the panel 13, and the seal lip 18 can be in close contact with the surface of the soundproof material 15 integrated with the panel 13.
[0023]
When the grommet 1 is mounted in the hole 14 of the panel 13, as shown in FIG. 2, the cup 2 is greatly contracted in the radial direction and inserted into the hole 14 of the panel 13 from the rear side of the cup 2. . The cup portion 2 can be easily crushed from the sealing wall 3 by the synergistic effect of the curved portions 11 and 12 (FIG. 1) having a substantially S-shaped cross section and the thinned portion 5. That is, since the second bending portion 12 protrudes forward, the first bending portion 11 and the shoulder portion 4 are moved closer to each other in the reduced diameter direction with the top of the second bending portion 12 as a fulcrum, and the cup portion The shoulder portion 4 of the 2 is squeezed in the radial direction with a small force, and the entire cup portion is reduced in diameter.
[0024]
As a result, the frictional force with respect to the hole 14 is reduced, the insertability of the cup 2 is increased, the insertion work is facilitated, and the friction of the cup 2 with respect to the peripheral edge 14a of the hole 14 is reduced. Scratches on the outer periphery are prevented. .
[0025]
Further, by pressing the thick skirt 7 on the rear side of the cup 2 in the radial direction (inward), the groove 8 having a V-shaped cross section is crushed and the skirt 7 is reduced in diameter. As described above, since the entire cup portion is reduced in diameter and the skirt portion 7 is reduced in diameter, the outer diameter D of the skirt portion 7 with the seal lip 18 in close contact with the base portion of the sealing wall 3 from the seal lip 18. The distance (height) H is greatly reduced. This also enhances the insertability of the rear side of the cup portion 2 into the hole portion 14, facilitates the insertion work, reduces the friction of the seal lip 18 against the peripheral edge 14 a of the hole portion 14, and damages the seal lip 18. Is prevented.
[0026]
As is clear from the comparison between FIG. 2 and FIG. 4 of the conventional example, the entire cup portion is reduced in diameter and the skirt portion 7 is reduced in diameter so that one side of the cup portion 2 is seen from the front as shown in FIG. When inserted into the hole 14, the other side of the cup 2 is in the same position as the peripheral edge 14a of the hole 14, and mutual interference becomes extremely small. This also prevents the seal lip 18 and the skirt 7 from being damaged.
[0027]
Further, by forming slightly tapered outer peripheral surface 7 b of the skirt portion 7 in FIG. 1, when brought into close contact with the outer peripheral surface 7 b of the skirt portion 7 a sealing lip 18 as shown in FIG. 2, the sealing lip 18 The curvature on the base (root) 18a side is reduced, and the protrusion amount on the base 18a side is reduced. This also prevents the seal lip 18 from interfering with the peripheral edge 14a of the hole 14 of the panel 13 and prevents the seal lip 18 from being damaged.
[0028]
As in the prior art, after inserting into the hole 14 of the panel 13 from the rear side of the cup portion 2, the grommet 1 is pulled forward by holding the front cylindrical portion 9, so that the fitting groove 16 becomes the hole portion of the panel 13. 14 is fitted.
[0029]
Instead of the sealing wall 3 having a substantially S-shaped cross section, a sealing wall (not shown) having a corrugated cross section or a substantially V-shaped cross section may be used. However, when the sealing wall 3 having a substantially S-shaped cross section is used, the resilience is superior to the sealing walls of other embodiments, and enlargement of the sealing wall 3 in the radial direction is prevented. The restoring force is also exerted by the first bending portion 11.
[0030]
Moreover, it is also possible to use a groove portion (not shown) having a U-shaped cross section instead of the groove portion 8 having the V-shaped cross section. However, the groove portion 8 having a V-shaped cross section can make the skirt portions 7 closely contact each other as compared with the groove portion having a U-shaped cross section, and the skirt portion 7 can be more easily reduced in diameter.
[0031]
Further, a grommet (in this case, there is no groove portion 8) provided with a sealing wall 3 having a substantially S-shaped cross section of the cup portion 2 and a lightening portion 5 is inserted into the hole portion 14 of the panel 13 from the rear to the front. Even in the case where the cup portion 2 is reduced in diameter, the insertion and mounting operations can be performed easily and reliably. Moreover, the characteristic part of this invention is applicable also to the grommet which does not have the sound-insulating film | membrane 20.
[0032]
【The invention's effect】
As described above, according to the invention described in claim 1 , by pressing the thick skirt in the radial direction, the groove is crushed and the skirt can be easily reduced in diameter with a small force. When inserting into the hole of the panel from the side, that is, the rear end side, the insertion operation can be easily and reliably performed.
[0033]
According to the second aspect of the present invention, when the skirt is pressed in the radial direction and the groove is crushed, the opposing side surfaces of the groove having a V-shaped cross section closely contact each other without any gaps, so that the skirt is surely secured. Therefore, the insertion operation is further facilitated.
[0034]
According to the invention described in claim 3, when the grommet is inserted into the hole of the panel, the thick hem portion of the cup portion is pressed in the radial direction so that the groove portion is crushed and the hem portion is reduced with a small force. The diameter of the cup portion can be easily reduced with a small force from the root side sealing wall side, so that the cup portion can be reduced in diameter from the bottom side, that is, the rear end side. The insertion operation can be carried out easily and reliably when inserting into the cable.
[0035]
In addition, according to the invention of claim 4, the sealing wall having a substantially S-shaped cross section can reliably absorb the bending at the time of diameter reduction, can efficiently reduce the diameter, and has excellent resilience after inserting the panel, and the cup. The part can be securely fixed to the hole of the panel.
[0036]
According to the fifth aspect of the present invention, the flexibility of the shoulder portion is increased by the thinning, and the shoulder portion is easily bent when inserted into the hole portion of the panel, thereby improving the insertability. In particular, the flexibility of the cup portion is increased by the synergistic effect with the flexible sealing wall, and the diameter of the cup portion is reduced efficiently and reliably, so that the insertion workability is further improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view in a free state showing an embodiment of a grommet according to the present invention.
FIG. 2 is a longitudinal sectional view showing a state in which the grommet is inserted into the hole of the panel from the rear side.
FIG. 3 is a longitudinal sectional view showing a conventional grommet.
FIG. 4 is a longitudinal sectional view showing a state in which the grommet is similarly inserted into the hole of the panel from the rear side.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Grommet 2 Cup part 3 Sealing wall 4 Shoulder part 5 Thickening part 7 Bottom part 8 Groove part 9 Tubular part 13 Panel 14 Hole part 26 Wire harness

Claims (5)

ワイヤハーネスを挿通する筒状部と、該筒状部の外側に続き、パネルの孔部に嵌着する大径のカップ部とを備える弾性のグロメットにおいて、
前記パネルの一方の面側に位置する厚肉の裾部に、グロメット軸方向に延びる溝部が形成されたことを特徴とするグロメット。
In an elastic grommet provided with a cylindrical part that passes through the wire harness, and a large-diameter cup part that fits outside the cylindrical part and fits into the hole of the panel,
A grommet characterized in that a groove extending in the grommet axial direction is formed in a thick skirt located on one surface side of the panel .
前記溝部が断面V字状に形成されたことを特徴とする請求項1記載のグロメット。The grommet according to claim 1, wherein the groove is formed in a V-shaped cross section . 前記カップ部が、前記筒状部に交差して縮径方向の可撓性を有する前側の封止壁と、後側の前記裾部とを備え、該パネルの孔部に該カップ部を該裾部側から挿入する際に、前記溝部と該封止壁とによって該カップ部が縮径されることを特徴とする請求項1又は2記載のグロメット。 The cup portion includes a front sealing wall that intersects the cylindrical portion and has flexibility in a diameter reducing direction, and the rear hem portion, and the cup portion is provided in the hole of the panel. The grommet according to claim 1 or 2 , wherein the cup portion is reduced in diameter by the groove portion and the sealing wall when inserted from the skirt side . 前記封止壁が断面略S字状に屈曲形成されたことを特徴とする請求項記載のグロメット。The grommet according to claim 3, wherein the sealing wall is bent to have a substantially S-shaped cross section . 前記封止壁に続く前記カップ部の肩部の内周面側が湾曲状に肉抜きされたことを特徴とする請求項3又は4記載のグロメット。The grommet according to claim 3 or 4, wherein the inner peripheral surface side of the shoulder portion of the cup portion following the sealing wall is cut into a curved shape .
JP21662599A 1999-07-30 1999-07-30 Grommet Expired - Fee Related JP3794607B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102359665A (en) * 2011-07-30 2012-02-22 奇瑞汽车股份有限公司 Automobile metal plate sealing piece

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4361027B2 (en) 2005-02-14 2009-11-11 矢崎総業株式会社 Grommet
JP7348007B2 (en) * 2019-09-17 2023-09-20 矢崎総業株式会社 grommet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102359665A (en) * 2011-07-30 2012-02-22 奇瑞汽车股份有限公司 Automobile metal plate sealing piece

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