JP2011244553A

JP2011244553A - Grommet

Info

Publication number: JP2011244553A
Application number: JP2010112684A
Authority: JP
Inventors: Mie Mori; 美映森; Yoshihisa Kobayashi; 良尚小林; Yukiya Atsumi; 幸也渥美
Original assignee: Honda Motor Co Ltd; Sumitomo Wiring Systems Ltd
Current assignee: Honda Motor Co Ltd; Sumitomo Wiring Systems Ltd
Priority date: 2010-05-14
Filing date: 2010-05-14
Publication date: 2011-12-01
Anticipated expiration: 2030-05-14
Also published as: JP5453166B2

Abstract

PROBLEM TO BE SOLVED: To provide a grommet in which inserting/locking force to a car body panel is reduced and a holding force after locking is improved.SOLUTION: The grommet includes: an insertion cylinder part 2 for passing a group of wires in tight contact with each other; a thin enlarged-diameter cylinder part 3 surrounding the insertion cylinder part from its outer periphery with spacing; and an annular thick car body locking part 4 continued to a protruding end of the thin enlarged-diameter cylinder part. The insertion cylinder part is arranged protrusively from a portion surrounded with the thick car body locking part as a push-in part. The thin enlarged-diameter cylinder part includes a radial-direction protruding part 30 and a refraction outer peripheral cylinder part 31 provided with an outward inclined part 31a continued to the radial-direction protruding part and an inward inclined part 31b continued to the outward inclined part. Four or more deformation promoting ribs 10 are arranged protrusively on an inner surface of the radial-direction protruding part by leaving intervals in a peripheral direction at positions spaced apart from a connection point with the insertion cylinder part. An outward inclined surface is arranged on a surface of each deformation promoting rib opposed to the insertion cylinder part. When the insertion cylinder part is pulled in the axial direction, the radial-direction protruding part and the refraction outer periphery cylinder part are deformed in the diameter-reduction direction while being close contact with the outer periphery of the insertion cylinder part and are extended in the axial direction.

Description

本発明は、車体パネルの貫通穴を通すワイヤハーネスに外嵌し、前記貫通穴に装着するグロメットに関し、特に、低挿入力で貫通穴に通して該貫通穴に係止し、かつ、係止後はワイヤハーネスに引張力が負荷されても貫通穴からの離脱を確実に防止するものである。 The present invention relates to a grommet that is externally fitted to a wire harness that passes through a through-hole of a vehicle body panel and is attached to the through-hole, and in particular, is locked to the through-hole through the through-hole with a low insertion force. After that, even if a tensile force is applied to the wire harness, the separation from the through hole is surely prevented.

自動車の車体パネルに設けた貫通穴を通してワイヤハーネスを配索する場合、該ワイヤハーネスにグロメットを外装し、該グロメットを貫通穴に装着して防塵、防水、遮音等を図っている。この種のグロメットとして、本出願人の出願を含め多数のグロメットが提供されている。 When a wire harness is routed through a through hole provided in a body panel of an automobile, a grommet is externally mounted on the wire harness, and the grommet is attached to the through hole so as to prevent dust, waterproof, and sound insulation. As this kind of grommets, a large number of grommets including applications of the present applicant are provided.

例えば、特開平９−１７２６１号公報に図１７に示すグロメット１００が提案されている。該グロメット１００はワイヤハーネス１０１を密着して挿通する小径筒部１０２に拡径筒部１０３を連続させ、その拡径部側に厚肉とした膨出部１０４、車体係止凹部１０５、鍔部１０６を順次連設している。
前記グロメット１００は小径筒部１０２より車体パネルＰの貫通穴Ｈに押し込んで挿入し、挿入側から小径筒部１０２を引っ張って、車体係止凹部１０５を貫通穴Ｈの周縁に係止している。 For example, Japanese Patent Laid-Open No. 9-17261 proposes a grommet 100 shown in FIG. The grommet 100 includes a small-diameter cylindrical portion 102 through which a wire harness 101 is inserted in close contact with an enlarged cylindrical portion 103, and a thickened bulging portion 104, a vehicle body locking concave portion 105, and a collar portion on the enlarged-diameter portion side. 106 are sequentially arranged.
The grommet 100 is inserted by being pushed into the through hole H of the vehicle body panel P from the small diameter cylindrical portion 102, and the small diameter cylindrical portion 102 is pulled from the insertion side to lock the vehicle body locking recess 105 to the periphery of the through hole H. .

特開平９−１７２６１号公報JP-A-9-17261

前記特許文献１のグロメット１００では、ワイヤハーネス１０１をグロメット１００に挿通させる際、小径筒部１０２が拡がりづらいため拡げ治具が必要となるが、無理に拡げると小径筒部１０２に亀裂が生じるか、拡げ治具に損傷が生じやすくなり、ワイヤハーネスの挿通作業性が悪い問題がある。
また、車体パネルの貫通穴Ｈにグロメットを挿入係止する際、小径筒部１０２側から貫通穴Ｈに挿入した後に、挿入側から小径筒部１０２を引っ張って、膨出部１０４を縮径させて貫通穴Ｈを挿通する作業時に、膨出部１０４が厚肉で縮径方向に変形しにくく、大きな挿入力が必要となり、作業者の負担が増大する等の問題がある。 In the grommet 100 of Patent Document 1, when the wire harness 101 is inserted through the grommet 100, the small-diameter cylindrical portion 102 is difficult to expand, and thus an expansion jig is necessary. There is a problem that the spreading jig is easily damaged and the wire harness insertion workability is poor.
Further, when inserting and locking the grommet in the through hole H of the vehicle body panel, after inserting the grommet into the through hole H from the small diameter cylindrical portion 102 side, the small diameter cylindrical portion 102 is pulled from the insertion side to reduce the diameter of the bulging portion 104. During the operation of inserting the through hole H, there is a problem that the bulging portion 104 is thick and difficult to deform in the diameter reducing direction, requiring a large insertion force and increasing the burden on the operator.

本発明は、前記グロメットの問題点を解消し、グロメットへのワイヤハーネスの挿通作業が容易であり、かつ、ワイヤハーネスに取り付けたグロメットを低挿入力で貫通穴に挿通して、車体パネルの貫通穴に係止でき、さらに、貫通穴に係止後もグロメットが貫通穴から外れるのを確実に防止してグロメットの係止力を高めることを課題としている。 The present invention eliminates the problems of the grommet, facilitates the insertion work of the wire harness into the grommet, and inserts the grommet attached to the wire harness into the through-hole with a low insertion force to penetrate the vehicle body panel. An object is to increase the locking force of the grommet by reliably preventing the grommet from coming off the through hole even after locking in the through hole.

前記課題を解決するため、本発明は、車体パネルの貫通穴を通すワイヤハーネスに外嵌し、前記貫通穴に装着するゴムまたはエラストマーからなるグロメットであって、
電線群を密着させて貫通させる挿通筒部と、
前記挿通筒部の外周から突出し、該挿通筒部を空間をあけて囲む薄肉拡径筒部と、
前記薄肉拡径筒部の突出端に連続する環状の厚肉車体係止部とを備え、前記挿通筒部は前記厚肉車体係止部に囲まれた部分より突出させて押込部とし、
前記薄肉拡径筒部は、前記挿通筒部の外周に連続する径方向突出部と、該径方向突出部に連続する外向き傾斜部と該外向き傾斜部に連続する内向き傾斜部とを設けた屈折外周筒部とを備え、前記外向き傾斜部と内向き傾斜部との屈折点は前記車体パネルの貫通穴より外方へ位置させる設定とし、
前記屈折外周筒部の内向き傾斜部の先端に、前記厚肉車体係止部を内外周面の両方を突出させて連結し、かつ、
前記薄肉拡径筒部の径方向突出部の内面には、前記挿通筒部との連結点と間隔をあけた位置に複数の変形促進リブを周方向に間隔をあけて突設し、前記挿通筒部が軸線方向に引張された時に該挿通筒部の外周面に密着して前記径方向突出部および屈折外周筒部を縮径方向に変形させると共に軸線方向へ伸長させるものとしているグロメットを提供している。 In order to solve the above-mentioned problem, the present invention is a grommet made of rubber or elastomer that is externally fitted to a wire harness that passes through a through hole of a vehicle body panel and is attached to the through hole.
An insertion tube portion that allows the wire group to adhere and penetrates;
Projecting from the outer periphery of the insertion cylinder part, and surrounding the insertion cylinder part with a space,
An annular thick-walled vehicle body locking portion that is continuous with the protruding end of the thin-walled enlarged-tube portion, and the insertion tube portion protrudes from a portion surrounded by the thick-walled vehicle body locking portion as a pushing portion,
The thin-walled enlarged cylindrical portion includes a radial protruding portion that is continuous with the outer periphery of the insertion cylindrical portion, an outwardly inclined portion that is continuous with the radially protruding portion, and an inwardly inclined portion that is continuous with the outwardly inclined portion. A refractive outer peripheral cylindrical portion provided, and the refraction point of the outward inclined portion and the inward inclined portion is set to be positioned outward from the through hole of the vehicle body panel,
At the tip of the inwardly inclined portion of the refracting outer peripheral cylindrical portion, the thick vehicle body locking portion is connected by projecting both inner and outer peripheral surfaces, and
A plurality of deformation promoting ribs are provided on the inner surface of the radially projecting portion of the thin-walled enlarged cylindrical portion at a position spaced from a connection point with the insertion cylindrical portion at intervals in the circumferential direction. Provided is a grommet that is in close contact with the outer peripheral surface of the insertion tube portion when the tube portion is pulled in the axial direction, deforms the radially projecting portion and the refractive outer periphery tube portion in the reduced diameter direction, and extends in the axial direction. is doing.

本発明のグロメットは、ワイヤハーネスの挿通筒部の外周から突出する拡径筒部は、その径方向突出部および屈折外周筒部の全体を薄肉として変形し易くしている。かつ、該薄肉拡径筒部の径方向突出部に、変形促進リブを設けているが、該変形促進リブは、挿通筒部と直接に連結せずに間隔をあけて設けると共に、環状とせずに周方向に分散させて設け、グロメットへの押込力が解除されると屈折外周筒部は弾性力で復元して拡径できるようにしている。さらに、変形促進リブにより厚肉車体係止部が引っ張られて車体パネルに対する係止位置から外れて車室内へ抜けないようにしている。前記変形促進リブは屈折外周筒部とも隙間をあけていることが好ましい。 In the grommet of the present invention, the enlarged diameter cylindrical portion protruding from the outer periphery of the insertion cylindrical portion of the wire harness is easily deformed by thinning the entire radial protruding portion and the refractive outer peripheral cylindrical portion. In addition, although the deformation promotion rib is provided in the radially projecting portion of the thin-walled enlarged cylindrical portion, the deformation promotion rib is not directly connected to the insertion cylinder portion but is provided with a space and is not annular. Are distributed in the circumferential direction, and when the pushing force to the grommet is released, the refractive outer cylindrical portion is restored by an elastic force so that the diameter can be expanded. Further, the thick-walled vehicle body locking portion is pulled by the deformation promotion ribs so that it does not come out of the locking position with respect to the vehicle body panel and does not come out into the vehicle interior. It is preferable that the deformation promoting rib has a gap with the refractive outer peripheral cylindrical portion.

本発明のグロメットは、前記挿通筒部が貫通穴を通して押し込まれた時に、まず、挿通筒部を連結した薄肉の径方向突出部を変形させて変形促進リブを挿通筒部の外周面に密着させて挿通筒部の押込力を促進させる。かつ、該変形促進リブの挿通筒部との対向面を外向き傾斜面としているため、前記径方向突出部を内方へ変形させ、該径方向突出部の変形に応じて連結した屈折外周筒部を縮径させる方向に変形させ、該屈折外周筒部の先端に連結した厚肉車体係止部が貫通穴の周縁に係止しているため、屈折外周筒部を軸線方向に伸長させて車体パネルの貫通穴を挿通できるようにしている。その際、屈折外周筒部に連結した厚肉車体係止部に過度の引張力を負荷しないため、該厚肉車体係止部を車体パネルの貫通穴周縁の外面に係止した状態で保持でき、屈折外周筒部のみを低挿入力で貫通穴に挿通できる。かつ、挿通後にグロメットの押込力を解除すると、屈折外周筒部は変形促進リブと離れて弾性力で復元し、車体パネルの貫通穴周縁の内面側に自動的に位置させることができ、作業性を高めることができる。 In the grommet of the present invention, when the insertion tube portion is pushed through the through-hole, first, the thin radial protruding portion connecting the insertion tube portion is deformed to bring the deformation promoting rib into close contact with the outer peripheral surface of the insertion tube portion. The pushing force of the insertion tube part is promoted. In addition, since the surface facing the insertion tube portion of the deformation promoting rib is an outwardly inclined surface, the radially protruding portion is deformed inward and connected in accordance with the deformation of the radially protruding portion. Since the thick-walled body locking portion connected to the tip of the refracting outer peripheral cylindrical portion is locked to the periphery of the through hole, the refractive outer peripheral cylindrical portion is extended in the axial direction. It can be inserted through the through hole in the body panel. At this time, since an excessive tensile force is not applied to the thick-walled body locking portion connected to the refractive outer peripheral cylindrical portion, the thick-walled body locking portion can be held in a state of being locked to the outer surface of the through hole periphery of the body panel. Only the refractive outer peripheral cylindrical portion can be inserted into the through hole with a low insertion force. And when the pushing force of the grommet is released after insertion, the refractive outer peripheral cylinder part is separated from the deformation promoting rib and restored by elastic force, and can be automatically positioned on the inner surface side of the through hole periphery of the body panel. Can be increased.

前記変形促進リブは、４個以上とすることが好ましい。また。これらの各変形促進リブの挿通筒部との対向面に外向き傾斜面を設け、屈折外周筒部と対向する外面は内向き傾斜面または軸線方向と平行な直線面としていることが好ましい。 The deformation promoting ribs are preferably four or more. Also. It is preferable that an outwardly inclined surface is provided on the surface of each of the deformation promoting ribs facing the insertion tube portion, and the outer surface facing the refractive outer peripheral tube portion is an inwardly inclined surface or a straight surface parallel to the axial direction.

本発明のグロメットは車体パネルの貫通穴が真円形状である場合、前記径方向突出部が円形とし、前記変形促進リブを周方向に９０度間隔をあけて４個設けている。
また、車体パネルの貫通穴が楕円形状または長円形状の場合、前記径方向突出部が楕円形または長円形で、前記変形促進リブを長軸線上の両側に２個設けると共に短軸側の両側に各２個設け、合計６個設けている。 In the grommet of the present invention, when the through hole of the vehicle body panel has a perfect circle shape, the radial protrusion is circular, and four deformation promoting ribs are provided at intervals of 90 degrees in the circumferential direction.
When the through hole of the vehicle body panel is elliptical or oval, the radial protrusion is elliptical or oval, and two deformation promoting ribs are provided on both sides on the major axis and both sides on the minor axis side. Two are provided for each, and a total of six are provided.

前記のように変形促進リブを分散配置することにより、該変形促進リブによる付勢力を屈折外周筒部の全周に負荷することができると共に、過度の力を屈折外周筒部に負荷せず、該屈折外周筒部の復元力を阻害しないようにしている。 By dispersing and arranging the deformation promoting ribs as described above, the urging force by the deformation promoting ribs can be applied to the entire circumference of the refractive outer peripheral cylindrical part, and an excessive force is not applied to the refractive outer peripheral cylindrical part, The restoring force of the refracting outer cylindrical portion is not hindered.

前記変形促進リブの前記屈折外周筒部と対向する外面の外周端の位置は、前記厚肉車体係止部の内周面の位置より外方へ位置させ、前記変形促進リブは厚肉車体係止部と干渉して厚肉車体係止部より抜け出ない構成としていることが好ましい。 The position of the outer peripheral end of the outer surface of the deformation promoting rib facing the refracting outer peripheral cylindrical portion is positioned outward from the position of the inner peripheral surface of the thick vehicle body engaging portion, and the deformation promoting rib is engaged with the thick vehicle body engaging member. It is preferable to have a configuration that interferes with the stop portion and does not come out of the thick vehicle body locking portion.

前記のように、本発明のグロメットでは、変形促進リブの外周端より厚肉車体係止部の内周面を内方に位置させているため、車体パネルの貫通穴に係止したグロメットに対して、ワイヤハーネスを介して車室外方向への引張力が負荷されても、変形促進リブは厚肉車体係止部と干渉し、厚肉車体係止部から抜け出ることはできず、グロメットが車体パネルから外れるのを確実に防止できる。 As described above, in the grommet of the present invention, the inner peripheral surface of the thick-walled vehicle body locking portion is positioned inward from the outer peripheral end of the deformation promoting rib, so that the grommet locked to the through-hole of the vehicle body panel Even if a tensile force is applied to the outside of the passenger compartment through the wire harness, the deformation promoting rib interferes with the thick-walled body locking portion and cannot come out of the thick-walled body locking portion. It can be surely prevented from coming off the panel.

本発明のグロメットに、さらに、前記薄肉拡径筒部に囲まれた部分で且つ前記屈折外周筒部の屈折位置と対向する位置の前記挿通筒部の外周面に、環状の干渉リブを突設し、該干渉リブは前記変形促進リブおよび前記厚肉車体係止部が内方に変形した時に干渉するものとすることが好ましい。 In the grommet of the present invention, an annular interference rib is further provided on the outer peripheral surface of the insertion tube portion at a position surrounded by the thin-walled enlarged tube portion and facing the refractive position of the refractive outer tube portion. The interference rib preferably interferes when the deformation promoting rib and the thick-body locking part are deformed inward.

前記した干渉リブを設けると、前記変形促進リブの外周端を厚肉車体係止部の内周面より外方に位置させなくとも、変形促進リブは干渉リブにより厚肉車体係止部より抜き出て車体パネルの貫通穴から外れるのを防止できる。かつ、車室内内側から過度の引張力が負荷されて厚肉車体係止部が車体パネルの貫通穴周縁から外れる力がかかっても、前記干渉リブに厚肉車体係止部が干渉して変形を防止し、車体パネルからグロメットが外れるのを防止できる。 When the interference rib described above is provided, the deformation promotion rib is removed from the thick-walled body locking portion by the interference rib even if the outer peripheral end of the deformation-promoting rib is not positioned outward from the inner peripheral surface of the thick-walled body locking portion. It can prevent coming out and coming off from the through hole of the vehicle body panel. Even if an excessive tensile force is applied from the inside of the passenger compartment and a force is applied to disengage the thick-walled body locking portion from the periphery of the through hole of the vehicle body panel, the thick-walled vehicle body locking portion interferes with the interference rib and deforms. It is possible to prevent the grommet from coming off from the vehicle body panel.

本発明のグロメットの前記挿通筒部は前記薄肉拡径筒部および厚肉車体係止部に囲まれた部分を通して軸線方向に延在しているが、前記薄肉拡径筒部から軸線方向に延在した後に屈曲させ、車室内側でワイヤハーネスを屈曲方向にガイドするものとしてもよい。
さらに、前記挿通筒部に屈曲筒部を連続して設け、該屈曲筒部の屈曲側と反対側の挿通筒部の外方に、前記径方向突出部の薄肉部分の外面からリブを突設していることが好ましい。 The insertion tube portion of the grommet of the present invention extends in the axial direction through a portion surrounded by the thin-walled enlarged tube portion and the thick-walled body locking portion, but extends from the thin-walled enlarged tube portion in the axial direction. The wire harness may be bent after being present, and the wire harness may be guided in the bending direction on the vehicle interior side.
Further, a bent tube portion is continuously provided in the insertion tube portion, and a rib is projected from the outer surface of the thin portion of the radial protrusion on the outer side of the insertion tube portion on the opposite side to the bending side of the bending tube portion. It is preferable.

前述したように、本発明のグロメットは、屈折外周筒部を車体パネルの貫通穴に低挿入力で通過させるために設ける変形促進リブを、ワイヤハーネスを密着して貫通させる挿通筒部の外周面に連続して突出した薄肉拡径筒部の径方向突出部に周方向に分散配置すると共に前記挿通筒部および屈折外周筒部と連結していないため、適度の力で屈折外周筒部を縮径方向に変形させることができ、押込力を解除した状態で屈折外周筒部を弾性力で原状復帰させることができる。よって、グロメットを押し込むだけで、低挿入力で貫通穴に挿通できると共に貫通穴の周縁に確実に係止することができ、作業性を高めることができる。
さらに、厚肉車体係止部を変形促進リブで過度に引っ張らないため、グロメットの挿入時およびグロメットを挿入係止した後に、厚肉車体係止部が車体パネルから外れるのを確実に防止できる。 As described above, the grommet of the present invention has an outer peripheral surface of an insertion tube portion that allows the wire harness to closely pass through the deformation promoting rib provided to pass the refractive outer periphery tube portion through the through hole of the vehicle body panel with a low insertion force. In addition, the refractive outer cylinder part is shrunk with an appropriate force since it is distributed in the circumferential direction on the radially extending part of the thin-walled enlarged cylindrical part protruding continuously and is not connected to the insertion cylinder part and the refractive outer cylinder part. It can be deformed in the radial direction, and the refractive outer peripheral cylindrical portion can be restored to its original state by an elastic force in a state where the pushing force is released. Therefore, by only pushing the grommet, it can be inserted into the through-hole with a low insertion force and can be reliably locked to the periphery of the through-hole, thereby improving workability.
Further, since the thick-walled vehicle body locking portion is not excessively pulled by the deformation promoting rib, it is possible to reliably prevent the thick-walled vehicle body locking portion from being detached from the vehicle body panel when the grommet is inserted and after the grommet is inserted and locked.

第一実施形態のグロメットを車体に取り付けた状態の断面図である。It is sectional drawing of the state which attached the grommet of 1st embodiment to the vehicle body. （Ａ）（Ｂ）は第一実施形態のグロメットを両側方から見た斜視図である。(A) (B) is the perspective view which looked at the grommet of the first embodiment from both sides. 前記グロメットの断面図である。It is sectional drawing of the said grommet. 前記グロメットの拡大側面図である。It is an enlarged side view of the grommet. （Ａ）〜（Ｅ）は車体パネルの貫通穴にグロメットを取り付ける工程を示す図面である。(A)-(E) are drawings which show the process of attaching a grommet to the through-hole of a vehicle body panel. グロメットを取り付けた後に、ワイヤハーネスに引張力が負荷された時に車体パネルから外れないことを示す図面である。It is drawing which shows that it does not remove | deviate from a vehicle body panel, when a tensile force is loaded to a wire harness after attaching a grommet. 第二実施形態のグロメットを車体パネルの貫通穴に取り付けた状態を示す断面図である。It is sectional drawing which shows the state which attached the grommet of 2nd embodiment to the through-hole of the vehicle body panel. 第二実施形態のグロメットを貫通穴に挿入する工程の断面図である。It is sectional drawing of the process of inserting the grommet of 2nd embodiment in a through-hole. 第二実施形態のグロメットを車体パネルに取り付けた後に、ワイヤハーネスに引張力が負荷された時に車体パネルから外れないことを示す図面である。It is drawing which shows that it does not remove | deviate from a vehicle body panel, when a tensile force is loaded to a wire harness after attaching the grommet of 2nd embodiment to a vehicle body panel. 第三実施形態のグロメットを車体パネルの貫通穴に取り付けた状態を示す断面図である。It is sectional drawing which shows the state which attached the grommet of 3rd embodiment to the through-hole of the vehicle body panel. 第三実施形態のグロメットを貫通穴に挿入する工程の断面図である。It is sectional drawing of the process of inserting the grommet of 3rd embodiment in a through-hole. 第三実施形態のグロメットを車体パネルに取り付けた後に、ワイヤハーネスに引張力が負荷された時に車体パネルから外れないことを示す図面である。It is drawing which shows that it does not remove | deviate from a vehicle body panel, when a tensile force is loaded to a wire harness after attaching the grommet of 3rd embodiment to a vehicle body panel. 第四実施形態のグロメットの側面図である。It is a side view of the grommet of a fourth embodiment. （Ａ）（Ｂ）は第五実施形態のグロメットの斜視図である。(A) and (B) are perspective views of a grommet of a fifth embodiment. 第六実施形態のグロメットを示し、（Ａ）は斜視図、（Ｂ）は正面図、（Ｃ）は底面図、（Ｄ）は平面図である。The grommet of 6th embodiment is shown, (A) is a perspective view, (B) is a front view, (C) is a bottom view, (D) is a top view. （Ａ）は図１５（Ｄ）のＡ−Ａ線断面図、（Ｂ）はワイヤハーネスに引張力が負荷された時の抜け止め作用の説明図である。(A) is the sectional view on the AA line of Drawing 15 (D), and (B) is an explanatory view of the retaining action when tensile force is loaded on the wire harness. 従来のグロメットの断面図である。It is sectional drawing of the conventional grommet.

以下、本発明のグロメットの実施形態を図面を参照して説明する。
図１乃至図６に第一実施形態のグロメット１を示す。 Hereinafter, embodiments of the grommet of the present invention will be described with reference to the drawings.
1 to 6 show a grommet 1 according to the first embodiment.

第一実施形態のグロメット１は、図１に示すように、ワイヤハーネスの電線群Ｗの外周面に固定し、エンジンルームの車室外Ｘと車室内Ｙとを仕切る車体パネルＰの楕円形状の貫通穴Ｈに車室外Ｘより押し込んで車室内Ｙへ電線群Ｗを貫通させ、グロメット１を貫通穴Ｈの周縁に係止するものである。
なお、車室外Ｘより押し込む方法に変えて、逆に、車室内Ｙから電線群を引っ張ってグロメット１を貫通穴を通して引っ張りこんでもよい。 As shown in FIG. 1, the grommet 1 of the first embodiment is fixed to the outer peripheral surface of the wire group W of the wire harness, and has an elliptical shape through a vehicle body panel P that partitions the outside X of the engine room and the inside Y of the engine room. The wire group W is pushed into the hole H from outside the vehicle interior X to penetrate the vehicle interior Y, and the grommet 1 is locked to the periphery of the through hole H.
Instead of the method of pushing from outside the vehicle compartment X, conversely, the wire group may be pulled from the vehicle interior Y and the grommet 1 may be pulled through the through hole.

グロメット１はゴムまたはエラストマーを用いて一体成形している。
グロメット１は、軸線方向に延在する挿通筒部２と、該挿通筒部２の軸線方向の中間の外周から突出して、挿通筒部２を空間Ｃをあけて囲む薄肉拡径筒部３と、該薄肉拡径筒部３の突出端に連続する環状の厚肉車体係止部４とを備えている。挿通筒部２は厚肉車体係止部４に囲まれた部分より、更に外方へ突出させて押込部２ａとしている。
該挿通筒部２の内径はワイヤハーネスを構成する前記電線群Ｗの外径より小さくしている。電線群Ｗを貫通して固定する作業時には、拡径治具（図示せず）で広げて電線群Ｗを挿通させ、電線群Ｗの外周面に密着させるようにし、電線群Ｗを挿通筒部２に貫通させた状態で、長さ方向両端の外周面から電線群Ｗの外周面にかけて粘着テープＴを巻き付けて固定される。 The grommet 1 is integrally formed using rubber or elastomer.
The grommet 1 includes an insertion tube portion 2 that extends in the axial direction, a thin-diameter enlarged tube portion 3 that protrudes from the outer periphery in the axial direction of the insertion tube portion 2 and surrounds the insertion tube portion 2 with a space C therebetween. And an annular thick-walled vehicle body locking portion 4 that is continuous with the protruding end of the thin-walled enlarged-tube portion 3. The insertion tube portion 2 protrudes further outward from the portion surrounded by the thick-walled vehicle body locking portion 4 to form a pushing portion 2a.
The inner diameter of the insertion tube portion 2 is smaller than the outer diameter of the wire group W constituting the wire harness. At the time of fixing the wire group W through the wire group W, the wire group W is expanded by a diameter expansion jig (not shown) and inserted so that the wire group W is brought into close contact with the outer peripheral surface of the wire group W. 2, the adhesive tape T is wound around and fixed to the outer peripheral surface of the electric wire group W from the outer peripheral surface at both ends in the length direction.

前記挿通筒部２から突設する前記薄肉拡径筒部３は全体を均一な薄肉として撓み易くしている。薄肉拡径筒部３は挿通筒部２の外周に連続する径方向突出部３０と、該径方向突出部３０の外端に連続する外向き傾斜部３１ａと、該外向き傾斜部３１ａに連続する内向き傾斜部３１ｂとを設けた屈折外周筒部３１とを備えている。該屈折外周筒部３１の外向き傾斜部３１ａと内向き傾斜部３１ｂとの屈曲点３１ｃの外径は前記車体パネルＰの貫通穴Ｈの内径より大とし、屈曲点３１ｃを貫通穴Ｈより外方へ位置させる設定としている。
また、前記径方向突出部３０の外径は貫通穴Ｈの内径より小さくしている。 The thin diameter-expanded cylindrical portion 3 projecting from the insertion cylindrical portion 2 is easy to bend as the whole is uniformly thin. The thin-walled enlarged diameter cylindrical portion 3 is continuous with the radially protruding portion 30 that is continuous with the outer periphery of the insertion cylindrical portion 2, the outwardly inclined portion 31a that is continuous with the outer end of the radially protruding portion 30, and the outwardly inclined portion 31a. And a refractive outer peripheral cylindrical portion 31 provided with an inwardly inclined portion 31b. The outer diameter of the bending point 31c between the outwardly inclined portion 31a and the inwardly inclined portion 31b of the refractive outer peripheral cylindrical portion 31 is larger than the inner diameter of the through hole H of the vehicle body panel P, and the bent point 31c is outside the through hole H. It is set to be located toward.
In addition, the outer diameter of the radial protrusion 30 is smaller than the inner diameter of the through hole H.

前記屈折外周筒部３１の内向き傾斜部３１ｂの先端に、前記厚肉車体係止部４を連結し、該厚肉車体係止部４の内周面４ａおよび外周面４ｂの両方に内外方向に突出させている。
環状に前記厚肉車体係止部４の肉厚ｔ１は薄肉拡径筒部３の肉厚ｔ２の４〜６倍程度とし、径方向断面形状を矩形状としている。かつ、内向き傾斜部３１ｂの先端と厚肉車体係止部４との連結部の外周位置に貫通穴Ｈの内径と同等の環状凹部６を形成し、その底面にシールリップ７を突設している。 The thick vehicle body locking portion 4 is connected to the tip of the inwardly inclined portion 31b of the refractive outer peripheral cylindrical portion 31, and both the inner peripheral surface 4a and the outer peripheral surface 4b of the thick vehicle body locking portion 4 are inward and outward. Protruding.
The wall thickness t1 of the thick-walled vehicle body locking portion 4 is annularly about 4 to 6 times the wall thickness t2 of the thin-walled enlarged diameter cylindrical portion 3, and the radial cross-sectional shape is rectangular. In addition, an annular recess 6 equivalent to the inner diameter of the through hole H is formed at the outer peripheral position of the connecting portion between the tip of the inwardly inclined portion 31b and the thick-walled vehicle body locking portion 4, and a seal lip 7 is projected on the bottom surface thereof. ing.

前記薄肉拡径筒部３の径方向突出部３０の前記空間Ｃに面する内面に、挿通筒部２との連結端３０ａと間隔をあけた位置に変形促進リブ１０を空間Ｃに向けて突設している。
前記変形促進リブ１０は、図４に示すように、周方向に間隔をあけて６個設けている。即ち、長軸側の両側に変形促進リブ１０Ａ、１０Ｂ、短軸側の両側にそれぞれ変形促進リブ１０Ｃと１０Ｄ、１０Ｅと１０Ｆを設け、変形促進リブ１０Ｃ〜１０Ｆは挿通筒部２に向けて外周側から放射状に突設している。 The deformation promoting rib 10 projects toward the space C at a position spaced from the connecting end 30a with the insertion tube portion 2 on the inner surface facing the space C of the radially projecting portion 30 of the thin-walled enlarged tube portion 3. Has been established.
As shown in FIG. 4, six deformation promoting ribs 10 are provided at intervals in the circumferential direction. That is, the deformation promoting ribs 10A and 10B are provided on both sides of the long axis side, and the deformation promoting ribs 10C and 10D, 10E and 10F are provided on both sides of the short axis side, respectively. Projected radially from the side.

各変形促進リブ１０（１０Ａ〜１０Ｆ）の突出端面１０ａは図３に示すように内向き傾斜部３１ｂの先端位置より突出させない位置としている。また、挿通筒部２との対向面１０ｂの突出側に外向き傾斜面１０ｃを設けている。屈折外周筒部３１との対向する外面１０ｄは小さい傾斜角度で内向きに傾斜させている。 As shown in FIG. 3, the projecting end face 10a of each deformation promoting rib 10 (10A to 10F) is positioned so as not to project from the tip position of the inwardly inclined portion 31b. Further, an outwardly inclined surface 10 c is provided on the protruding side of the surface 10 b facing the insertion tube portion 2. The outer surface 10d facing the refractive outer peripheral cylindrical portion 31 is inclined inward at a small inclination angle.

前記形状としたグロメット１の挿通筒部２に、前記のように、電線群Ｗを密着させて挿通し両端を粘着テープＴで固着してワイヤハーネスの所定位置にグロメット１を外嵌している。 As described above, the wire group W is brought into close contact with the insertion tube portion 2 of the grommet 1 having the above-described shape, and both ends are fixed by the adhesive tape T, and the grommet 1 is externally fitted at a predetermined position of the wire harness. .

前記グロメット１を取り付けたワイヤハーネスを車体パネルＰの貫通穴Ｈに挿通係止する作業工程を図５を参照して説明する。 An operation process for inserting and locking the wire harness to which the grommet 1 is attached into the through hole H of the vehicle body panel P will be described with reference to FIG.

図５（Ａ）に示すように、グロメット１の径方向突出部３０を挿入側に配置して車室外Ｘより車室内Ｙへとグロメット１に固定したワイヤハーネスを押し込む。
其の際、屈折外周筒部３１の屈曲点３１ｃは貫通穴Ｈの内径より大としているため、図５（Ｂ）に示すように、外向き傾斜部３１ａの外周面は貫通穴Ｈの内周面に接触する。
この状態で、グロメット１をワイヤハーネスの電線群Ｗと共にさらに車室内Ｙへと押し込むと、図５（Ｃ）に示すように、薄肉拡径筒部３の径方向突出部３０および屈折外周筒部３１が挿通筒部２の移動に応じて室内側Ｙへと伸びて縮径方向に変形する。この径方向突出部３０の変形に伴い変形促進リブ１０は挿通筒部２の外周面に密着して一体化する。このように挿通筒部２と変形促進リブ１０を一体化すると、挿通筒部２の剛性が高まり、挿通筒部２の更なる押し込みで、図５（Ｄ）に示すように、屈折外周筒部３１を室内側へと延ばすと共に内径方向へと縮径させ、屈折外周筒部３１の屈曲点３１ｃを貫通穴Ｈを挿通させることができ、続いて、図５（Ｅ）に示すように、厚肉車体係止部４が車体パネルＰの車室外面の貫通穴Ｈの周縁に当接係止する。 As shown in FIG. 5 (A), the radial protrusion 30 of the grommet 1 is arranged on the insertion side, and the wire harness fixed to the grommet 1 is pushed from the outside X to the inside Y of the vehicle.
At that time, since the bending point 31c of the refractive outer peripheral cylindrical portion 31 is larger than the inner diameter of the through hole H, the outer peripheral surface of the outward inclined portion 31a is the inner periphery of the through hole H as shown in FIG. Touch the surface.
In this state, when the grommet 1 is further pushed into the vehicle interior Y together with the wire group W of the wire harness, as shown in FIG. 5C, the radial protrusion 30 and the refractive outer peripheral cylindrical portion of the thin-walled enlarged cylindrical portion 3 31 extends toward the indoor side Y in accordance with the movement of the insertion tube portion 2 and deforms in the direction of diameter reduction. As the radial protrusion 30 is deformed, the deformation promoting rib 10 is brought into close contact with and integrated with the outer peripheral surface of the insertion tube portion 2. When the insertion tube portion 2 and the deformation promoting rib 10 are integrated as described above, the rigidity of the insertion tube portion 2 is increased, and as shown in FIG. 31 can be extended to the indoor side and reduced in the inner diameter direction, the bending point 31c of the refractive outer peripheral cylindrical portion 31 can be inserted through the through hole H, and subsequently, as shown in FIG. The meat vehicle body locking portion 4 abuts and locks to the periphery of the through hole H on the outer surface of the vehicle body panel P.

この状態で、車室外Ｘからの押し込みを解くと、変形促進リブ１０を挿通筒部２の外周面に連結していないため、図１に示すように、径方向突出部３０および屈折外周筒部３１は弾性力により元の形状に復帰する。即ち、薄肉拡径筒部３の全体が伸びた状態より元の状態に戻り、屈折外周筒部３１の屈曲点３１ｃは外方へ突出した状態となり、貫通穴Ｈの外方へ突出すると共に車体パネルＰの車室内Ｙ側面に近接して位置し、貫通穴Ｈにグロメット１を係止した状態となる。 In this state, when the push-in from outside the vehicle compartment X is released, the deformation promoting rib 10 is not connected to the outer peripheral surface of the insertion tube portion 2, so that as shown in FIG. 31 returns to its original shape by elastic force. That is, the thin-walled expanded cylindrical portion 3 returns to its original state from the extended state, the bending point 31c of the refractive outer peripheral cylindrical portion 31 protrudes outward, protrudes outward of the through hole H, and the vehicle body. The panel P is located close to the side of the vehicle interior Y, and the grommet 1 is locked in the through hole H.

前記のように、車体パネルＰの貫通穴Ｈに係止したグロメット１は、車体パネルＰの車室外側面Ｐ１に厚肉車体係止部４が密着して係止し、車室内側面Ｐ２に屈折外周筒部３１の屈曲点３１ｃが位置し、車体パネルＰを挟む状態となる。其の際、厚肉車体係止部４の内周面４ａが変形促進リブ１０の外面１０ｄより内方に位置する。 As described above, the grommet 1 locked in the through hole H of the vehicle body panel P is locked with the thick-walled vehicle body locking portion 4 in close contact with the vehicle interior side outer surface P1 of the vehicle body panel P, and is refracted to the vehicle interior side surface P2. The bending point 31c of the outer peripheral cylinder part 31 is located, and the vehicle body panel P is sandwiched. At that time, the inner peripheral surface 4 a of the thick-walled vehicle body locking portion 4 is positioned inward from the outer surface 10 d of the deformation promoting rib 10.

前記のようにグロメット１が車体パネルＰの貫通穴Ｈの周縁に係止していることにより、図６に示すように、電線群Ｗに車室外Ｘ方向への引張力が負荷されても、変形促進リブ１０が厚肉車体係止部４と干渉して抜け出ることができず、グロメット１が貫通穴Ｈから外れるのを防止できる。 Since the grommet 1 is locked to the periphery of the through hole H of the vehicle body panel P as described above, even if a tensile force in the X direction outside the passenger compartment is applied to the electric wire group W, as shown in FIG. It is possible to prevent the deformation promoting rib 10 from coming off due to interference with the thick vehicle body locking portion 4 and preventing the grommet 1 from coming off the through hole H.

図７乃至図９に第二実施形態のグロメット１Ｂを示す。
第二実施形態のグロメット１Ｂは、変形促進リブ１０は径方向突出部３０の径方向の中間位置に設け、径方向突出部３０と屈折外周筒部３１との連結点からも間隔をあけて突出している。かつ、変形促進リブ１０は空間Ｃに向けて三角形状として突出させ、傾斜させた外面１０ｄを厚肉車体係止部４の内周端に接触する位置まで突設している。
他の構成は第一実施形態と同様であるため同一符号を付して説明を省略する。 7 to 9 show a grommet 1B according to the second embodiment.
In the grommet 1 B of the second embodiment, the deformation promoting rib 10 is provided at a radial intermediate position of the radial protrusion 30, and protrudes at a distance from the connection point between the radial protrusion 30 and the refractive outer peripheral cylindrical portion 31. ing. Further, the deformation promoting rib 10 protrudes in a triangular shape toward the space C, and the inclined outer surface 10d is projected to a position where it contacts the inner peripheral end of the thick-walled vehicle body locking portion 4.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

前記のように変形促進リブ１０を径方向突出部３０の径方向中間部に設け、屈折外周筒部３１とも間隔をあけて突設すると、図８に示すように、グロメット１Ｂの押込時に、屈折外周筒部３１と連結する径方向突出部３０の外周部分を変形させて縮径させることができ、変形をより促進させ、より低挿入力でグロメット１Ｂを車体パネルＰの貫通穴Ｈを通して、該貫通穴Ｈの周縁に係止することができる。 As described above, when the deformation promoting rib 10 is provided in the radial intermediate portion of the radial protruding portion 30 and protruded with a gap from the refractive outer peripheral cylindrical portion 31, as shown in FIG. 8, when the grommet 1B is pushed in, the bending is refracted. The outer peripheral portion of the radial projecting portion 30 connected to the outer peripheral cylindrical portion 31 can be deformed to reduce the diameter, further promoting the deformation, and passing the grommet 1B through the through hole H of the vehicle body panel P with a lower insertion force. It can be locked to the periphery of the through hole H.

また、グロメットを車体パネルに取り付けた状態で変形促進リブ１０が厚肉車体係止部４の内周面と接触して、厚肉車体係止部４を外方へ押すため、図７に示すように、厚肉車体係止部４と内向き傾斜部３１ｂとの連結部の環状凹部６を貫通穴Ｈの内周面に押し付けることができる。 Further, since the deformation promoting rib 10 comes into contact with the inner peripheral surface of the thick-walled vehicle body locking portion 4 with the grommet attached to the vehicle body panel, the thick-walled vehicle body locking portion 4 is pushed outward, as shown in FIG. As described above, the annular recess 6 of the connecting portion between the thick vehicle body locking portion 4 and the inwardly inclined portion 31b can be pressed against the inner peripheral surface of the through hole H.

さらに、グロメット１Ｂを車体パネルＰに係止した後に、車室外Ｘ方向から引張力が負荷された場合、図９に示すように、薄肉拡径筒部３が車室外Ｘ方向に向けて変形すると、変形促進リブ１０が厚肉車体係止部４に乗り上げた状態となる。よって、変形促進リブ１０は厚肉車体係止部４から抜け出ることができず、グロメット１Ｂが車体パネルＰから外れるのを防止できる。
逆に、車室内Ｙ側から引張力が負荷されると、厚肉車体係止部４が変形促進リブ１０と干渉し、グロメット１Ｂが車体パネルＰから外れるのを防止できる。 Further, when a tensile force is applied from the X direction outside the passenger compartment after the grommet 1B is locked to the vehicle body panel P, as shown in FIG. 9, when the thin-walled enlarged cylindrical portion 3 is deformed toward the X direction outside the passenger compartment. Then, the deformation promotion rib 10 is in a state of riding on the thick-walled vehicle body locking portion 4. Therefore, the deformation promoting rib 10 cannot come out of the thick-walled vehicle body locking portion 4, and the grommet 1 B can be prevented from coming off from the vehicle body panel P.
Conversely, when a tensile force is applied from the vehicle interior Y side, it is possible to prevent the thick-walled vehicle body locking portion 4 from interfering with the deformation promoting rib 10 and the grommet 1B from being detached from the vehicle body panel P.

図１０乃至図１２に第三実施形態のグロメット１Ｃを示す。
該第三実施形態のグロメット１Ｃは第二実施形態と同様な空間Ｃに向けて三角形に突出する形状としているが、厚肉車体係止部４の内周面の位置までは突出させていない。
該グロメット１Ｃでは、屈折外周筒部３１に囲まれた空間Ｃを通る挿通筒部２の外周面に、干渉リブ２０を環状に突出している。
前記干渉リブ２０は軸方向に山形形状に突出し、変形促進リブ１０の傾斜内面１０ｈと接触する傾斜面２０ａと厚肉車体係止部４側へ突出する傾斜面２０ｂとを有する。 10 to 12 show a grommet 1C according to the third embodiment.
The grommet 1 C of the third embodiment has a shape that protrudes in a triangle toward the space C similar to the second embodiment, but does not protrude to the position of the inner peripheral surface of the thick-body locking part 4.
In the grommet 1 C, the interference rib 20 protrudes in an annular shape on the outer peripheral surface of the insertion cylinder part 2 that passes through the space C surrounded by the refractive outer cylinder part 31.
The interference rib 20 protrudes in the shape of a mountain in the axial direction, and has an inclined surface 20a that contacts the inclined inner surface 10h of the deformation promoting rib 10 and an inclined surface 20b that protrudes toward the thick vehicle body engaging portion 4 side.

該グロメット１Ｃを車体パネルＰの貫通穴Ｈに通す工程では、図１１に示すように、薄肉拡径筒部３が伸びて、屈折外周筒部３１の屈曲点３１ｃが貫通穴Ｈを通り、低挿入力で挿入して、図１０に示すように挿通係止できる。
貫通穴Ｈの内周面に係止した状態は、図１２に示すように、干渉リブ２０の傾斜面２０ｂが厚肉車体係止部４の内周端と接触し、厚肉車体係止部４を外方へ押すため、厚肉車体係止部４と内向き傾斜部３１ｂとの連結部の環状凹部６を貫通穴Ｈの内周面に押し付けることができる。 In the step of passing the grommet 1C through the through-hole H of the vehicle body panel P, as shown in FIG. 11, the thin-walled enlarged diameter cylindrical portion 3 extends, and the bending point 31c of the refractive outer peripheral cylindrical portion 31 passes through the through-hole H. It can be inserted and locked by insertion force as shown in FIG.
As shown in FIG. 12, the inclined surface 20b of the interference rib 20 is in contact with the inner peripheral end of the thick-walled vehicle body locking portion 4 so that the thick-walled vehicle body locking portion is engaged. 4 is pushed outward, the annular recess 6 of the connecting portion between the thick-walled vehicle body locking portion 4 and the inwardly inclined portion 31b can be pressed against the inner peripheral surface of the through hole H.

また、グロメット１Ｃを車体パネルＰに取り付けた後に、図１２に示すように、車室外Ｘ側からの引張力が作用しても、変形促進リブ１０は干渉リブ２０と干渉し、逆方向の車室内Ｙ側から引張力が作用しても、厚肉車体係止部４は干渉リブ２０と干渉する。よって、いずれの方向からの引張力に対しても干渉リブ２０の干渉により、グロメット１Ｃが車体パネルＰから外れるのを防止できる。 Further, as shown in FIG. 12, after the grommet 1C is attached to the vehicle body panel P, the deformation promoting rib 10 interferes with the interference rib 20 even if a tensile force from the outside X of the vehicle compartment acts, and the vehicle in the reverse direction Even when a tensile force acts from the room Y side, the thick-walled body locking portion 4 interferes with the interference rib 20. Therefore, it is possible to prevent the grommet 1C from being detached from the vehicle body panel P due to the interference of the interference rib 20 with respect to the tensile force from any direction.

図１３に第四実施形態のグロメット１Ｄを示す。
該グロメット１Ｄを貫通係止する車体パネルの貫通穴を円形としている。よって、薄肉拡径筒部３の外径は円形とし、径方向突出部３０を円形としている。この変形の径方向突出部３０に設ける変形促進リブ１０は９０度間隔をあけて４個設けている。
他の構成および作用は第一実施形態と同様であるため、説明を省略する。なお、第二、第三実施形態と同様な構成としてもよい。 FIG. 13 shows a grommet 1D of the fourth embodiment.
The through hole of the vehicle body panel that penetrates and locks the grommet 1D is circular. Therefore, the outer diameter of the thin-walled enlarged cylindrical portion 3 is circular, and the radial protrusion 30 is circular. Four deformation-promoting ribs 10 provided in the radial protrusion 30 of this deformation are provided at intervals of 90 degrees.
Since other configurations and operations are the same as those in the first embodiment, the description thereof is omitted. The configuration may be the same as in the second and third embodiments.

図１４（Ａ）（Ｂ）に第五実施形態のグロメット１Ｅを示す。
該グロメット１Ｅは薄肉拡径筒部３の径方向突出部３０より突出する挿通筒部２に屈曲筒部２５を連続して設けている。
前記挿通筒部２を通した電線群Ｗを屈曲筒部２５に通し、車室内において電線群Ｗを屈曲させている。
他の構成および作用は第一実施形態と同様であるため、説明を省略する。なお、第二、第三実施形態と同様な構成としてもよい。 FIGS. 14A and 14B show a grommet 1E according to the fifth embodiment.
The grommet 1 E is provided with a bent cylinder part 25 continuously in the insertion cylinder part 2 protruding from the radial protrusion part 30 of the thin-walled enlarged cylinder part 3.
The wire group W that has passed through the insertion tube portion 2 is passed through the bent tube portion 25, and the wire group W is bent in the passenger compartment.
Since other configurations and operations are the same as those in the first embodiment, the description thereof is omitted. The configuration may be the same as in the second and third embodiments.

図１５および図１６に第六実施形態のグロメット１Ｆを示す。
該グロメット１Ｆは第五実施形態のグロメット１Ｅと同様に挿通筒部２に屈曲筒部２５を連続して設けている。
前記屈曲筒部２５の屈曲側と反対側の挿通筒部２の外方に、径方向突出部３０の薄肉部分の外面からリブ４０を突設し、かつ、挿通筒部２の外周にもリブ４１（４１Ａ〜４１Ｄ）を設けている。他の構成は第五実施形態と同様であり、同一符号を付して説明を省略する。 15 and 16 show a grommet 1F of the sixth embodiment.
The grommet 1F is provided with a bent cylinder part 25 continuously in the insertion cylinder part 2 as in the grommet 1E of the fifth embodiment.
A rib 40 protrudes from the outer surface of the thin portion of the radial protrusion 30 on the outer side of the insertion tube portion 2 on the side opposite to the bending side of the bent tube portion 25, and the rib is also formed on the outer periphery of the insertion tube portion 2. 41 (41A-41D) is provided. Other configurations are the same as those of the fifth embodiment, and the same reference numerals are given and description thereof is omitted.

この第六実施形態のグロメット１Ｆでは、径方向突出部３０の薄肉部分にリブ４０を設けていることで、図１６に示すように、挿通したワイヤハーネスが矢印方向に引張された時、変形促進リブ１０が厚肉車体係止部４に接触すると共に、リブ４０がリブ４１Ａ、４１Ｂに接触し、グロメット１Ｆが抜けるのが防止される。また、径方向突出部３０の薄肉部分にリブ４０を設けていることで、グロメット１Ｆへのワイヤハーネスの通し作業性を高めることができる。 In the grommet 1F of the sixth embodiment, the rib 40 is provided in the thin portion of the radial protrusion 30 so that when the inserted wire harness is pulled in the direction of the arrow as shown in FIG. While the rib 10 comes into contact with the thick-walled vehicle body locking portion 4, the rib 40 comes into contact with the ribs 41A and 41B, and the grommet 1F is prevented from coming off. Moreover, the workability | operativity of the wire harness to the grommet 1F can be improved by providing the rib 40 in the thin part of the radial direction protrusion part 30. FIG.

１、１Ｂ〜１Ｆグロメット
２電線群の挿通筒部
３薄肉拡径筒部
４厚肉車体係止部
６環状凹部
７シールリップ
１０（１０Ａ〜１０Ｆ）変形促進リブ
２０干渉リブ
３０径方向突出部
３１屈折外周筒部
３１ａ外向き傾斜部
３１ｂ内向き傾斜部
３１ｃ屈曲点 DESCRIPTION OF SYMBOLS 1, 1B-1F Grommet 2 Insertion cylinder part of electric wire group 3 Thin diameter expansion cylinder part 4 Thick body locking part 6 Annular recessed part 7 Seal lip 10 (10A-10F) Deformation promotion rib 20 Interference rib 30 Radial direction protrusion part 31 Refraction outer cylinder part 31a Outward inclined part 31b Inward inclined part 31c Bending point

Claims

車体パネルの貫通穴を通すワイヤハーネスに外嵌し、前記貫通穴に装着するゴムまたはエラストマーからなるグロメットであって、
電線群を密着させて貫通させる挿通筒部と、
前記挿通筒部の外周から突出し、該挿通筒部を空間をあけて囲む薄肉拡径筒部と、
前記薄肉拡径筒部の突出端に連続する環状の厚肉車体係止部とを備え、前記挿通筒部は前記厚肉車体係止部に囲まれた部分より突出させて押込部とし、
前記薄肉拡径筒部は、前記挿通筒部の外周に連続する径方向突出部と、該径方向突出部に連続する外向き傾斜部と該外向き傾斜部に連続する内向き傾斜部とを設けた屈折外周筒部とを備え、前記外向き傾斜部と内向き傾斜部との屈折点は前記車体パネルの貫通穴より外方へ位置させる設定とし、
前記屈折外周筒部の内向き傾斜部の先端に、前記厚肉車体係止部を内外周面の両方を突出させて連結し、かつ、
前記薄肉拡径筒部の径方向突出部の内面には、前記挿通筒部との連結点と間隔をあけた位置に複数の変形促進リブを周方向に間隔をあけて突設し、前記挿通筒部が軸線方向に引張された時に該挿通筒部の外周面に密着して前記径方向突出部および屈折外周筒部を縮径方向に変形させると共に軸線方向へ伸長させるものとしているグロメット。 It is a grommet made of rubber or elastomer that is externally fitted to a wire harness that passes through a through hole of a vehicle body panel, and is attached to the through hole,
An insertion tube portion that allows the wire group to adhere and penetrates;
Projecting from the outer periphery of the insertion cylinder part, and surrounding the insertion cylinder part with a space,
An annular thick-walled vehicle body locking portion that is continuous with the protruding end of the thin-walled enlarged-tube portion, and the insertion tube portion protrudes from a portion surrounded by the thick-walled vehicle body locking portion as a pushing portion,
The thin-walled enlarged cylindrical portion includes a radial protruding portion that is continuous with the outer periphery of the insertion cylindrical portion, an outwardly inclined portion that is continuous with the radially protruding portion, and an inwardly inclined portion that is continuous with the outwardly inclined portion. A refractive outer peripheral cylindrical portion provided, and the refraction point of the outward inclined portion and the inward inclined portion is set to be positioned outward from the through hole of the vehicle body panel,
At the tip of the inwardly inclined portion of the refracting outer peripheral cylindrical portion, the thick vehicle body locking portion is connected by projecting both inner and outer peripheral surfaces, and
A plurality of deformation promoting ribs are provided on the inner surface of the radially projecting portion of the thin-walled enlarged cylindrical portion at a position spaced from a connection point with the insertion cylindrical portion at intervals in the circumferential direction. A grommet in which, when the cylinder part is pulled in the axial direction, the radial projecting part and the refractive outer cylinder part are deformed in the reduced diameter direction and are extended in the axial direction by closely contacting the outer peripheral surface of the insertion cylinder part.

前記変形促進リブは前記屈折外周筒部と対向する外面を内向き傾斜面または軸線方向と平行な直線面とし、かつ、
前記径方向突出部が円形で、前記変形促進リブを周方向に９０度間隔をあけて４個設け、
または、前記径方向突出部が楕円形または長円形で、前記変形促進リブを長軸線上の両側に２個設けると共に短軸側の両側に各２個設け、合計６個設けている請求項１に記載のグロメット。 The deformation promoting rib has an outer surface facing the refractive outer peripheral cylindrical portion as an inwardly inclined surface or a linear surface parallel to the axial direction, and
The radial protrusion is circular, and four deformation promoting ribs are provided at intervals of 90 degrees in the circumferential direction.
Alternatively, the radial protrusions are oval or oval, and two of the deformation promoting ribs are provided on both sides of the long axis and two are provided on both sides of the short axis, for a total of six. Grommet described in.

前記変形促進リブの前記屈折外周筒部と対向する外面の外周端の位置は、前記厚肉車体係止部の内周面の位置より外方へ位置させ、前記変形促進リブは厚肉車体係止部と干渉して厚肉車体係止部より抜け出ない構成としている請求項１または請求項２に記載のグロメット。 The position of the outer peripheral end of the outer surface of the deformation promoting rib facing the refracting outer peripheral cylindrical portion is positioned outward from the position of the inner peripheral surface of the thick vehicle body engaging portion, and the deformation promoting rib is engaged with the thick vehicle body engaging member. The grommet according to claim 1, wherein the grommet is configured not to come out of the thick-walled body locking portion due to interference with the stop portion.

前記薄肉拡径筒部に囲まれた部分で且つ前記屈折外周筒部の屈折位置と対向する位置の前記挿通筒部の外周面に、環状の干渉リブを突設し、該干渉リブは前記変形促進リブおよび前記厚肉車体係止部が内方に変形した時に干渉するものとしている請求項１乃至請求項３のいずれか１項に記載のグロメット。 An annular interference rib protrudes from the outer peripheral surface of the insertion tube portion at a position surrounded by the thin-walled enlarged tube portion and facing the refraction position of the refraction outer tube portion, and the interference rib is deformed. The grommet according to any one of claims 1 to 3, wherein the promotion rib and the thick-walled body locking portion interfere with each other when deformed inward.

前記挿通筒部は前記薄肉拡径筒部および厚肉車体係止部に囲まれた部分を通して軸線方向に延在し、かつ、前記薄肉拡径筒部から軸線方向に延在した後に屈曲させている請求項１乃至請求項４のいずれか１項に記載のグロメット。 The insertion tube portion extends in the axial direction through a portion surrounded by the thin-walled enlarged tube portion and the thick-walled body locking portion, and is bent after extending in the axial direction from the thin-walled enlarged tube portion. The grommet according to any one of claims 1 to 4.

前記挿通筒部に屈曲筒部を連続して設け、該屈曲筒部の屈曲側と反対側の挿通筒部の外方に、前記径方向突出部の薄肉部分の外面からリブを突設している請求項１乃至請求項５のいずれか１項に記載のグロメット。 A bent tube portion is continuously provided in the insertion tube portion, and a rib is projected from the outer surface of the thin portion of the radially projecting portion on the outer side of the insertion tube portion opposite to the bending side of the bent tube portion. The grommet according to any one of claims 1 to 5.