JP5136222B2

JP5136222B2 - Grommet

Info

Publication number: JP5136222B2
Application number: JP2008146302A
Authority: JP
Inventors: 崇奥原; 勉坂田; 智宇治田
Original assignee: Sumitomo Wiring Systems Ltd
Current assignee: Sumitomo Wiring Systems Ltd
Priority date: 2008-06-03
Filing date: 2008-06-03
Publication date: 2013-02-06
Anticipated expiration: 2028-06-03
Also published as: JP2009296741A

Description

本発明はグロメットに関し、詳しくは、自動車に配索するワイヤハーネスに組みつけて、車体パネルの貫通穴に装着し、貫通穴の挿通部分におけるワイヤハーネスの保護および防水、防塵を図るものである。 The present invention relates to a grommet, and more particularly, to a grommet that is assembled to a wire harness routed in an automobile and attached to a through hole of a vehicle body panel to protect, waterproof, and dust proof the wire harness at a through hole insertion portion.

従来、自動車のエンジンルームから車室内へ配索されるワイヤハーネスにはグロメットを装着し、エンジンルームと車室とを仕切る車体パネルの貫通穴にグロメットを取り付けて、貫通穴を通るワイヤハーネスの保護およびエンジンルーム側から車室への防水、防塵、遮音を図っている。 Conventionally, a grommet is attached to the wire harness routed from the engine room of the automobile to the vehicle interior, and the grommet is attached to the through hole of the vehicle body panel that separates the engine room from the vehicle interior, thereby protecting the wire harness passing through the through hole. In addition, waterproofing, dustproofing, and sound insulation from the engine room side to the vehicle compartment are made.

前記グロメットには、エンジンルームから車室へと配線するボンネット開放用のオープナーケーブルと、ウインドウォッシャー用の給水ホースからなる線材を貫通させる場合が多い。
この種のグロメットとして、例えば、特開平１１−２６０１７５号公報（特許文献１）には、図８（Ａ）に示すグロメット１００Ａが提案されている。該グロメット１００Ａはワイヤハーネスを密着して貫通させる小径筒部１０１と連続する拡径筒部１０２に線材の貫通穴１０３を設け、該貫通穴１０３の周縁から筒部１０４を突設している。拡径筒部の大径側の外周面には車体係止凹部１０５を環状に設けている。該グロメット１００Ａではケーブルやホースからなる線材２００を貫通穴１０３を通し、筒部１０４でガイドしている。
また、図８（Ｂ）に示すグロメット１００Ｂは、拡径筒部１０２の先端側に閉鎖面部１０６を設け、該閉鎖面部１０６の中央にワイヤハーネスを密着して貫通させる第２小径筒部１０７を連続して設けている。該グロメット１００Ｂでは、拡径筒部１０２の小径側に貫通穴１０３を設けていると共に、閉鎖面部１０６に貫通穴１０８を設け、該貫通穴１０８の周縁から筒部１０９を突設している。該グロメット１００Ｂでは、線材２００は筒部１０９、貫通穴１０８、１０３を通し、筒部１０９でガイドしている In many cases, the grommet is pierced with a wire consisting of an opener cable for opening a bonnet wired from the engine room to the passenger compartment and a water supply hose for a window washer.
As this type of grommet, for example, Japanese Patent Laid-Open No. 11-260175 (Patent Document 1) proposes a grommet 100A shown in FIG. The grommet 100 A is provided with a through hole 103 of a wire rod in an enlarged diameter cylindrical portion 102 that is continuous with a small diameter cylindrical portion 101 through which a wire harness is in close contact, and a cylindrical portion 104 is projected from the periphery of the through hole 103. A body locking recess 105 is provided in an annular shape on the outer peripheral surface on the large diameter side of the expanded diameter cylindrical portion. In the grommet 100 A, a wire rod 200 made of a cable or a hose is guided through a through hole 103 and is guided by a cylindrical portion 104.
In addition, a grommet 100B shown in FIG. 8B is provided with a closed surface portion 106 on the distal end side of the enlarged diameter cylindrical portion 102, and a second small diameter cylindrical portion 107 that allows the wire harness to closely pass through the center of the closed surface portion 106. It is provided continuously. In the grommet 100 B, a through hole 103 is provided on the small diameter side of the enlarged diameter cylindrical portion 102, a through hole 108 is provided in the closed surface portion 106, and a cylindrical portion 109 is projected from the periphery of the through hole 108. In the grommet 100B, the wire rod 200 is guided by the tube portion 109 through the tube portion 109 and the through holes 108 and 103.

前記特許文献１のグロメット１００Ａ、１００Ｂではいずれも筒部１０４、１０９の突出端に厚肉部１０４ａ、１０９ａを設け、該厚肉部１０４ａ、１０９ａを線材２００の外周面に密着させ、止水性を確保した状態で線材を移動できるようにしている。 In the grommets 100A and 100B of Patent Document 1, thick portions 104a and 109a are provided at the projecting ends of the cylindrical portions 104 and 109, and the thick portions 104a and 109a are brought into close contact with the outer peripheral surface of the wire 200, thereby preventing water blocking. The wire can be moved in the secured state.

特開平１１−２６０１７５号公報JP-A-11-260175

グロメットを取り付けて車体パネルの貫通穴を通したワイヤハーネスが、その両側で曲げられずに真っすぐに配索されると、特許文献１に開示されたグロメットに通した線材も直線性を保持できる。
近時、自動車に搭載される電装品の急増に伴いワイヤハーネスの配索スペースが減少している。よって、車体パネルの貫通穴を貫通させたワイヤハーネスが真っすぐに配索すると搭載品と干渉する場合がある。特に、車室側ではワイヤハーネスが引き出されるインストルメントパネル内に搭載される電装品が急増しているため、９０度曲げ等の急激に曲げられる場合が増加している。同様に、エンジンルーム側でも９０度近く屈曲される場合がある。 When the wire harness that is attached to the grommet and passes through the through hole of the vehicle body panel is routed straight without being bent on both sides thereof, the wire rod passed through the grommet disclosed in Patent Document 1 can also maintain linearity.
Recently, the wiring space for wiring harnesses has decreased with the rapid increase in electrical components mounted on automobiles. Therefore, if the wire harness that penetrates the through hole of the vehicle body panel is routed straight, it may interfere with the mounted product. In particular, since the electrical components mounted in the instrument panel from which the wire harness is pulled out are increasing rapidly on the passenger compartment side, the number of cases where it is bent suddenly such as 90 ° bending is increasing. Similarly, the engine room may be bent nearly 90 degrees.

ワイヤハーネスが９０度程度急激に曲げられると、該ワイヤハーネスを密着して貫通する小径筒部１０４、１０９も曲げられる。小径筒部１０１、１０７が曲げられると、該小径筒部１０１に連結した拡径筒部１０２、閉鎖面部１０６が追従して変形する。よって、拡径筒部１０２から突設した筒部１０４、閉鎖面部１０６から突設した筒部１０９も曲がることとなる。これら筒部１０４、１０９の先端の厚肉部１０４ａ、１０９ａは線材２００に密着させているが、該厚肉部の密着力だけでは、オープナーケーブルや給水ホースからなる線材２００を曲げる力はなく、線材２００は筒部１０４、１０９の曲げに追従せず、線材２００と筒部１０４、１０９との間に隙間が発生する。このように隙間ができると、該隙間から浸水が生じやすくなるため、グロメットの止水性能が低下する問題がある。 When the wire harness is bent suddenly by about 90 degrees, the small diameter cylindrical portions 104 and 109 penetrating the wire harness are also bent. When the small-diameter cylindrical portions 101 and 107 are bent, the large-diameter cylindrical portion 102 and the closed surface portion 106 connected to the small-diameter cylindrical portion 101 follow and deform. Therefore, the cylindrical portion 104 protruding from the enlarged diameter cylindrical portion 102 and the cylindrical portion 109 protruding from the closing surface portion 106 are also bent. The thick portions 104a and 109a at the tips of the cylindrical portions 104 and 109 are in close contact with the wire 200, but there is no force to bend the wire 200 made of an opener cable or a water supply hose only with the adhesion of the thick portion, The wire 200 does not follow the bending of the tube portions 104 and 109, and a gap is generated between the wire 200 and the tube portions 104 and 109. When a gap is formed in this way, water is liable to be generated from the gap, and there is a problem that the water stopping performance of the grommet is lowered.

本発明は、前記問題に鑑みてなされたもので、ワイヤハーネスが曲げられても、線材とグロメットのガイド管との間に隙間を発生させないようにして、止水性の向上を図ることを課題としている。 The present invention has been made in view of the above problems, and it is an object of the present invention to improve water stoppage by preventing a gap from being generated between a wire rod and a grommet guide tube even when a wire harness is bent. Yes.

前記課題を解決するため、第１の発明として、車体に設けた貫通穴に挿通するワイヤハーネスに外装すると共に線材を貫通させる弾性体からなるグロメットであって、
前記ワイヤハーネスの電線群を密着させて貫通する内筒と、
前記内筒に連結すると共に、大径側の外周面に車体係止凹部を環状に設けている拡径状の外筒を備え、
前記内筒の両端の押込側と引出側に挟まれた長さ方向中間部の外周から環状連結部を突設し、該環状連結部の外周端に前記外筒の厚肉部を連続させると共に該厚肉部から傾斜壁部を連続させ、前記厚肉部と傾斜壁部との境界に前記車体係止凹部を設け、かつ、前記傾斜壁部の小径端側は前記内筒と空間をあけて切り離し、該内筒の引出側は前記傾斜壁部より外方へ突出し、
前記外筒の前記傾斜壁部の小径側に線材の第１貫通穴を設け、該第１貫通穴の周縁から外方および内方に突出するガイド用外管およびガイド用内管を直管状に連通させて設け、前記ガイド用内管は傾斜壁部と内筒との間に設け、
前記ガイド用外管の内径を前記線材の外径と同等にしてシール状態で貫通させる一方、前記ガイド用内管の内面の一部から前記線材の外径と同等な通し穴を有するシール壁を突設し、該シール壁の通し穴に前記線材を貫通し、前記ガイド用内管から第１貫通穴を通してガイド用外管へと貫通する前記線材を所要間隔をあけた２カ所でシールすると共に支持し、さらに、前記環状連結部はＶ字状に屈曲させていると共に、前記環状連結部に線材の第２貫通穴を設け、該線材の第２貫通穴を設ける部分は軸線方向と直交する平面部としていることを特徴とするグロメットを提供している。
また、第２の発明として、車体に設けた貫通穴に挿通するワイヤハーネスに外装すると共に線材を貫通させる弾性体からなるグロメットであって、
前記ワイヤハーネスの電線群を密着させて貫通する内筒と、
前記内筒に連結すると共に、大径側の外周面に車体係止凹部を環状に設けている拡径状の外筒を備え、
前記内筒の両端の押込側と引出側に挟まれた長さ方向中間部の外周から環状連結部を突設し、該環状連結部の外周端に前記外筒の厚肉部を連続させると共に該厚肉部から傾斜壁部を連続させ、前記厚肉部と傾斜壁部との境界に前記車体係止凹部を設け、かつ、前記傾斜壁部の小径端側は前記内筒と空間をあけて切り離し、該内筒の引出側は前記傾斜壁部より外方へ突出し、
前記外筒の前記傾斜壁部の小径側に線材の第１貫通穴を設け、該第１貫通穴の周縁から外方および内方に突出するガイド用外管およびガイド用内管を直管状に連通させて設け、前記ガイド用内管は傾斜壁部と内筒との間に設け、
前記ガイド用外管の内径を前記線材の外径と同等にしてシール状態で貫通させる一方、前記ガイド用内管の内面の一部から前記線材の外径と同等な通し穴を有するシール壁を突設し、該シール壁の通し穴に前記線材を貫通し、前記ガイド用内管から第１貫通穴を通してガイド用外管へと貫通する前記線材を所要間隔をあけた２カ所でシールすると共に支持し、さらに、前記環状連結部より前記傾斜壁部の内面に向けて押しリブを突設し、該押しリブが当接する傾斜壁部の位置より外径側に前記第１貫通穴を設けていることを特徴とするグロメットを提供している。 In order to solve the above-mentioned problem, as a first invention , a grommet made of an elastic body that is sheathed in a wire harness that is inserted into a through hole provided in a vehicle body and penetrates a wire,
An inner cylinder penetrating through the wire harness of the wire harness; and
The outer cylinder is connected to the inner cylinder, and includes an outer cylinder having an enlarged diameter that is provided with a vehicle body engagement recess in the outer peripheral surface on the large diameter side,
An annular connecting portion protrudes from the outer periphery of the lengthwise intermediate portion sandwiched between the pushing side and the drawing side at both ends of the inner cylinder, and the thick portion of the outer cylinder is continuous with the outer peripheral end of the annular connecting portion. An inclined wall portion is continued from the thick wall portion, the vehicle body locking recess is provided at the boundary between the thick wall portion and the inclined wall portion, and the small diameter end side of the inclined wall portion opens a space from the inner cylinder. The drawer side of the inner cylinder protrudes outward from the inclined wall portion,
A first through hole of a wire is provided on the small diameter side of the inclined wall portion of the outer cylinder , and the guide outer pipe and the guide inner pipe projecting outward and inward from the peripheral edge of the first through hole are formed in a straight tube shape. Provided in communication , the guide inner pipe is provided between the inclined wall portion and the inner cylinder,
A seal wall having a through hole equivalent to the outer diameter of the wire rod from a part of the inner surface of the guide inner pipe while allowing the inner diameter of the guide outer tube to pass through in a sealed state with the outer diameter of the wire rod being equal. And projecting the wire rod through the through hole of the seal wall, and sealing the wire rod penetrating from the guide inner tube to the guide outer tube through the first through hole at two positions spaced apart from each other. The annular connecting portion is bent in a V shape, and a second through hole of the wire is provided in the annular connecting portion, and a portion where the second through hole of the wire is provided is orthogonal to the axial direction. A grommet characterized by being a flat portion is provided.
Further, as a second invention, a grommet made of an elastic body that is externally attached to a wire harness that is inserted through a through hole provided in a vehicle body and that allows a wire to pass therethrough,
An inner cylinder penetrating through the wire harness of the wire harness; and
The outer cylinder is connected to the inner cylinder, and includes an outer cylinder having an enlarged diameter that is provided with a vehicle body engagement recess in the outer peripheral surface on the large diameter side,
An annular connecting portion protrudes from the outer periphery of the lengthwise intermediate portion sandwiched between the pushing side and the drawing side at both ends of the inner cylinder, and the thick portion of the outer cylinder is continuous with the outer peripheral end of the annular connecting portion. An inclined wall portion is continued from the thick wall portion, the vehicle body locking recess is provided at the boundary between the thick wall portion and the inclined wall portion, and the small diameter end side of the inclined wall portion opens a space from the inner cylinder. The drawer side of the inner cylinder protrudes outward from the inclined wall portion,
A first through hole of a wire is provided on the small diameter side of the inclined wall portion of the outer cylinder, and the guide outer pipe and the guide inner pipe projecting outward and inward from the peripheral edge of the first through hole are formed in a straight tube shape. Provided in communication, the guide inner pipe is provided between the inclined wall portion and the inner cylinder,
A seal wall having a through hole equivalent to the outer diameter of the wire rod from a part of the inner surface of the guide inner pipe while allowing the inner diameter of the guide outer tube to pass through in a sealed state with the outer diameter of the wire rod being equal. And projecting the wire rod through the through hole of the seal wall, and sealing the wire rod penetrating from the guide inner tube to the guide outer tube through the first through hole at two positions spaced apart from each other. Further, a push rib is projected from the annular connecting portion toward the inner surface of the inclined wall portion, and the first through hole is provided on the outer diameter side from the position of the inclined wall portion with which the push rib abuts. The grommet is characterized by the fact that

前記ガイド用外管は前記第１貫通穴の周縁から縮径しながら突出し、縮径端から前記線材の外径と同等な内径のストレート管部を突出させ、該ストレート管部の先端は閉鎖端とし、該閉鎖端を切除して前記線材を貫通させている。
また、前記内筒と外筒との間に設けるガイド用内管の先端は開口端とし、かつ、該開口端より所要寸法離れた内部に前記シール壁を設けている。 The guide outer tube protrudes from the periphery of the first through-hole while reducing the diameter, and a straight tube portion having an inner diameter equivalent to the outer diameter of the wire rod is protruded from the reduced-diameter end. And the closed end is cut out to penetrate the wire.
Moreover, the front end of the guide inner pipe provided between the inner cylinder and the outer cylinder is an open end, and the seal wall is provided inside a predetermined dimension away from the open end.

前記のように、ワイヤハーネスに外装すると共に、オープナーケーブルや給水ホースの貫通部を備えたグロメットにおいて、拡径状の外筒に線材を貫通させる貫通穴を設け、該貫通穴から外方にガイド用外管を突設すると共に、該貫通穴からグロメット内部の内方にガイド用内管も突設し、これらのガイド用外管と内管とを直管状に連通している。これにより、線材をストレートにガイドできる区間を長くしている。かつ、これらガイド用外管とガイド用内筒とに夫々線材に密着するシール部を設け、ストレート状に保持する線材を所要距離をあけた２カ所でシールしているため、線材は少なくともいずれか一カ所ではシールでき、浸水を阻止することができる。
よって、ガイド用外管と内管とを突設した外筒と連結した内筒がワイヤハーネスにより曲げられ、それに追従して外筒に曲げが生じても、外筒に設けているガイド用外管とガイド用内管とは、若干傾斜しても直管状に連通している。よって、この区間で線材はストレートに支持でき、直管状に連通するガイド用外管とガイド用内管との間に隙間が発生せず、浸水の発生を防止できる。
かつ、ガイド用外管のストレート管部からなるシール部は、該ストレート管部の内径を線材の外径と同等とし、言わばシール管としている。このシール管で線材を線接触でシールしているのではなく、所要寸法の区間を面接触でシールしているため、よりシール性を高めることができる。 As described above, in the grommet provided with a through-hole for the opener cable and the water supply hose as well as being provided on the wire harness, a through-hole for penetrating the wire is provided in the expanded outer cylinder, and the guide is directed outward from the through-hole. The guide outer tube is provided so as to project from the through hole to the inside of the grommet, and the guide outer tube and the inner tube communicate with each other in a straight tube shape. Thereby, the section which can guide a wire straight is lengthened. In addition, the guide outer tube and the guide inner cylinder are each provided with a seal portion that is in close contact with the wire material, and the wire material that is held in a straight shape is sealed at two locations with a required distance, so at least one of the wire materials is It can be sealed at one place, preventing flooding.
Therefore, even if the inner cylinder connected to the outer cylinder protruding from the outer pipe for guide and the inner pipe is bent by the wire harness, and the outer cylinder is bent following this, the outer guide for the guide provided in the outer cylinder Even if the pipe and the guide inner pipe are slightly inclined, they communicate with each other in a straight tube shape. Therefore, the wire can be supported straight in this section, and no gap is generated between the guide outer tube communicating with the straight tube and the guide inner tube, so that the occurrence of water immersion can be prevented.
And the seal part which consists of a straight pipe part of the outer pipe for a guide makes the inner diameter of this straight pipe part the same as the outer diameter of a wire, and is used as a seal pipe. The sealing material is not sealed by line contact with this seal tube, but the section of the required dimension is sealed by surface contact, so that the sealing performance can be further improved.

線材はガイド用内管からガイド用外管へと通すため、ガイド用内管およびガイド用外管とも挿入口の内径は大として線材の挿入作業性を高めている。かつ、前記のように、ガイド用外管のストレート管部は所要寸法線材に密着するシール管となる。該ストレート管部の長さは２０〜３０ｍｍとしていることが好ましい。
また、ガイド用外管の先端を閉鎖し、該閉鎖部を切断して開口としているため、グロメットに線材を貫通させない場合にも共用で用いることができる。 Since the wire passes from the guide inner tube to the guide outer tube, the inner diameter of the insertion port is large for both the guide inner tube and the guide outer tube, thereby improving the workability of inserting the wire. As described above, the straight tube portion of the guide outer tube is a seal tube that is in close contact with the required dimension wire. It is preferable that the length of the straight pipe portion is 20 to 30 mm.
Moreover, since the front end of the guide outer tube is closed and the closed portion is cut to form an opening, it can be used in common even when the wire is not passed through the grommet.

前記のように、第１及び第２の発明のグロメットは、前記内筒の両端の押込側と引出側に挟まれた長さ方向中間部の外周から前記環状連結部を突設し、該連結部の外周端に前記外筒の厚肉部を連続させ、該外筒の傾斜壁部の小径端側内周面は前記内筒の外周面と空間をあけて切り離し、該内筒の引出側は前記傾斜壁部より外方へ突出している。 As described above, the first and second inventions of the grommet, projecting the annular connecting portion from the outer periphery of the push-side and longitudinally intermediate portion sandwiched between the pull-out side of both ends of the inner cylinder, the A thick-walled portion of the outer cylinder is connected to the outer peripheral end of the connecting portion, and the inner peripheral surface on the small diameter end side of the inclined wall portion of the outer cylinder is separated from the outer peripheral surface of the inner cylinder with a space therebetween, and the inner cylinder is drawn out. side is that protrude outwardly from the inclined wall portion.

前記のように、ワイヤハーネスを密着して貫通させる内筒と、車体係止凹部を設けた外筒とは、ワイヤハーネスの引出端側で大きな空間をあけて切り離している。
この切り離し型としたグロメットでは、グロメットから引き出されて車室側に配索されるワイヤハーネスが９０度近く急激に屈曲され、内筒が屈曲されても、外筒に直接的に内筒の変形を伝達させないようにすることができる。また、内筒の引出端側から距離をあけた長さ方向の中間位置から環状連結部を介して外筒と連結しているため、内筒の変形は環状連結部でも吸収でき、外筒の大径端側に設けた車体係止凹部に変形の影響を与えないようにすることができる。
よって、外筒に設ける線材貫通用のガイド用内管およびガイド用外管も曲げの影響を受けず、線材との密着性をより高めて止水性を確保することができる。 As described above, the inner cylinder through which the wire harness is brought into close contact and the outer cylinder provided with the vehicle body locking recess are separated from each other with a large space on the drawing end side of the wire harness.
With this detachable grommet, even if the wire harness pulled out from the grommet and routed to the passenger compartment side is bent nearly 90 degrees and the inner cylinder is bent, the inner cylinder is directly deformed to the outer cylinder. Can be prevented from being transmitted. In addition, since the outer cylinder is connected to the outer cylinder through the annular connecting portion from the intermediate position in the longitudinal direction at a distance from the drawing end side of the inner cylinder, the deformation of the inner cylinder can be absorbed by the annular connecting portion. It is possible to prevent the vehicle body locking recess provided on the large diameter end side from being affected by deformation.
Therefore, the guide inner pipe and the guide outer pipe for penetrating the wire provided in the outer cylinder are not affected by the bending, and the adhesiveness with the wire can be further enhanced to ensure the water-stopping property.

第１の発明のグロメットは、前記のように、環状連結部はＶ字状に屈曲させていると共に、前記線材の第２貫通穴を設ける部分は軸線方向と直交する平面部としている。
前記のように、環状連結部をＶ字状とすると、内筒がワイヤハーネスの曲げにより変形した際に、環状連結部で変形を吸収できる量を増加することができる。
その場合、Ｖ字状に屈曲した環状連結部に線材の第２貫通穴を設けると、線材の貫通作業性が悪くなるため、第２貫通穴を設ける部分は屈曲させずに平面状としている。 Grommet of the first invention, as described above, the ring-shaped connecting portion together are bent into a V-shape, the portion providing the second through-hole of the wire has a flat portion perpendicular to the axial direction.
As described above, when the annular coupling portion is V-shaped, when the inner cylinder is deformed by bending the wire harness, the amount of deformation that can be absorbed by the annular coupling portion can be increased.
In that case, the provision of the second through hole of the wire to the annular connecting portion that is bent in a V shape, since the through workability of the wire material is deteriorated, the portion providing the second through-hole that has a flat shape without bending .

第２の発明のグロメットは、前記のように、切り離し型のグロメットにおいて、前記環状連結部より前記傾斜壁部の内面に向けて押しリブを突設し、該押しリブが当接する傾斜壁部の位置より外径側に前記第１貫通穴を設けている。
即ち、グロメットを車体パネルの貫通穴に挿入する際、内筒の押込側から引き出されるワイヤハーネスを作業員が持って押し込んでいる。該内筒には環状連結部を介して外筒を連結しているため、外筒の引出側の傾斜壁部には押し込み力が伝わりにくい。そのため、環状連結部に押しリブを突設し、該押しリブを傾斜壁部の引出側の内周面に押しあてて、押しリブを介して傾斜壁部へ押し込み力を伝達し、グロメットの挿入作業性を高めている。
また、該環状連結部を薄肉としていると共に、径方向に突出させずに、傾斜させて突出させているため、内筒がワイヤハーネスの曲げにより変形した時に環状連結部で変形を吸収させて外筒に変形の影響を及ぼさないようにしている。これにより、押込側のエンジンルーム側でワイヤハーネスが急激に曲げられても、環状連結部で変形を吸収し、外筒に設けた線材の貫通部を変形させないようにすることができる。
また、前記押しリブは全周に連続して設けると、傾斜壁部へ伝える押し込み力を均等に作用させることができるために好ましいが、前記線材を貫通させる必要があるため、該貫通部で分割している。前記押しリブの肉厚は前記環状連結部の肉厚の２〜４倍とし、かつ、前記傾斜壁部の肉厚より大としていることが好ましい。 Grommet of the second invention, as described above, in the disconnection type grommet, before Symbol projecting ribs pushed toward an inner surface of the inclined wall portion from the annular coupling section, the inclined wall portion pusher rib abuts The first through hole is provided on the outer diameter side of the position.
That is, when inserting the grommet into the through hole of the vehicle body panel, an operator holds the wire harness drawn from the pushing side of the inner cylinder and pushes it in. Since the outer cylinder is connected to the inner cylinder via the annular connecting portion, the pushing force is hardly transmitted to the inclined wall portion on the drawer side of the outer cylinder. Therefore, push ribs project from the annular connecting part, and the push ribs are pressed against the inner peripheral surface on the drawer side of the inclined wall part, and the pushing force is transmitted to the inclined wall part via the push rib to insert the grommet. Workability is improved.
In addition, since the annular connecting portion is thin and protruded in an inclined manner without protruding in the radial direction, when the inner cylinder is deformed by bending of the wire harness, the annular connecting portion absorbs deformation and is The tube is not affected by deformation. Thereby, even if a wire harness is bent suddenly by the side of the engine room of the pushing side, a deformation | transformation can be absorbed by an annular connection part and it can avoid deforming the penetration part of the wire provided in the outer cylinder.
In addition, it is preferable to provide the pushing rib continuously on the entire circumference because the pushing force transmitted to the inclined wall portion can be applied uniformly, but it is necessary to penetrate the wire rod. doing. It is preferable that the thickness of the push rib is 2 to 4 times the thickness of the annular connecting portion and is larger than the thickness of the inclined wall portion.

前述したように、本発明のグロメットでは、ケーブルやホースからなる線材をシールおよび支持して貫通させるガイド用外管とガイド用内管とを直管状に連通し、かつ、これらガイド用外管と内管とのそれぞれシール部を設けている。該構成としていることにより、線材をストレートに保持し、直管状に連通するガイド用外管およびガイド用内管との間に隙間を発生させず、止水性を確保することができる。 As described above, in the grommet according to the present invention, the guide outer tube and the guide inner tube, which seal and support and penetrate the wire made of a cable or a hose, communicate in a straight tube, and the guide outer tube Sealing portions are provided for the inner tube. With this configuration, the wire rod is held straight, and no water gap is generated between the guide outer tube and the guide inner tube communicating in a straight tube shape, and water blocking can be ensured.

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、本発明のグロメットの第一実施形態を示す。
グロメット１は、図６に示すように、自動車のエンジンルーム（Ｘ）から車体パネル２に設けた貫通穴３を通して車室（Ｙ）へと配索されるワイヤハーネスＷ／Ｈに装着し、貫通穴３の周縁に係止して車体に取り付けるものである。グロメット１をエンジンルーム側からの押し込み操作で貫通穴３を通して車体に取り付けるワンモーショングロメットとし、グロメット１の一端は押込側Ｐ１、他端は引出側Ｐ２となる。グロメット１はゴムまたはエラストマーで一体成形している。 Hereinafter, embodiments of the grommet of the present invention will be described with reference to the drawings.
1 to 6 show a first embodiment of the grommet of the present invention.
As shown in FIG. 6, the grommet 1 is attached to a wire harness W / H that is routed from the engine room (X) of the automobile to the vehicle compartment (Y) through the through hole 3 provided in the vehicle body panel 2. It is fixed to the periphery of the hole 3 and attached to the vehicle body. The grommet 1 is a one-motion grommet that is attached to the vehicle body through the through-hole 3 by a pushing operation from the engine room side. One end of the grommet 1 is a pushing side P1, and the other end is a drawing side P2. The grommet 1 is integrally formed of rubber or elastomer.

第一実施形態のグロメット１は、前記した傾斜壁部の小径端側と内筒との間に空間を設けた切り離し型としている。
ワイヤハーネスＷ／Ｈの電線群を密着させて貫通する小径の内筒５と、該内筒５の両端の押込側５Ｐ１と引出側５Ｐ２に挟まれる長さ方向中間部の外周面５ａから突出する環状連結部６と、該環状連結部６の外周に連続する大径の外筒８を備えている。 The grommet 1 of the first embodiment is a detachable type in which a space is provided between the small diameter end side of the inclined wall portion and the inner cylinder.
A small-diameter inner cylinder 5 that penetrates the wire harness W / H in close contact with each other, and protrudes from the outer peripheral surface 5a of the intermediate portion in the longitudinal direction sandwiched between the pushing side 5P1 and the drawing side 5P2 at both ends of the inner cylinder 5. An annular connecting portion 6 and a large-diameter outer cylinder 8 continuous to the outer periphery of the annular connecting portion 6 are provided.

外筒８は内筒５と同心で、内筒５の長さ方向の中間部分に空間をあけて位置し、外筒８の長さ方向の両側の押込側Ｐ１および引出側Ｐ２の両方で内筒５が突出している。
外筒８は環状連結部６の外周との連続位置から引出側Ｐ２へと延在し、該連続位置に厚肉部９を設け、厚肉部９に連続して引出側Ｐ２へ縮径する傾斜壁部１１を延在させている。厚肉部９と傾斜壁部１１の大径端との境界に車体係止凹部１０を外周面に環状に開口して設けている。また、傾斜壁部１１の小径端に内筒５の軸線方向と平行に延在する引出先端側筒部１２を連続させている。 The outer cylinder 8 is concentric with the inner cylinder 5 and is located with a space in the middle portion of the inner cylinder 5 in the length direction, and is located on both the pushing side P1 and the drawing side P2 on both sides of the outer cylinder 8 in the length direction. The cylinder 5 protrudes.
The outer cylinder 8 extends from a continuous position with the outer periphery of the annular coupling portion 6 to the extraction side P2, and is provided with a thick portion 9 at the continuous position, and is continuously reduced in diameter to the extraction side P2. The inclined wall portion 11 is extended. A vehicle body locking recess 10 is provided at the boundary between the thick wall portion 9 and the large-diameter end of the inclined wall portion 11 so as to open annularly on the outer peripheral surface. Further, the leading end side cylinder portion 12 extending in parallel with the axial direction of the inner cylinder 5 is connected to the small diameter end of the inclined wall portion 11.

前記引出先端側筒部１２の内周面と内筒５の外周面５ａとの間は空間Ｓをあけて切り離している。即ち、内筒５の外周を空間Ｓをあけて外筒８の小径端側で囲んだ形状とし、かつ、小径筒部５の引出側５Ｐ２を外筒８から外方へ突出させている。 A space S is provided between the inner peripheral surface of the leading end side cylinder portion 12 and the outer peripheral surface 5a of the inner cylinder 5 so as to be separated. That is, the outer periphery of the inner cylinder 5 is formed in a shape surrounded by the small diameter end side of the outer cylinder 8 with a space S, and the drawer side 5P2 of the small diameter cylinder portion 5 is protruded outward from the outer cylinder 8.

外筒８の厚肉部９は、図３に示すように、環状連結部６の外周端６ａとの連続部から押込側Ｐ１へと若干突出し、押込側先端面９ａは軸線０に対して直交する垂直面としている。該厚肉部９と傾斜壁部１１の大径端との間に設ける車体係止凹部１０は、底面１０ａを挟む引出側面１０ｂの先端を前記傾斜壁１１の大径端１１ａに連続させている。該傾斜壁部１１は大径端１１ａと小径端１１ｂとの間で外周面の傾斜角度を変えた屈曲部１１ｃを設けている。該屈曲部１１ｃより小径側部１１ｄの傾斜角度は大とし、屈曲部１１ｃより大径側１１ｅは傾斜角度を小さくしている。 As shown in FIG. 3, the thick portion 9 of the outer cylinder 8 slightly protrudes from the continuous portion with the outer peripheral end 6a of the annular coupling portion 6 to the pushing side P1, and the pushing side tip surface 9a is orthogonal to the axis 0. The vertical plane to be. The vehicle body locking recess 10 provided between the thick wall portion 9 and the large-diameter end of the inclined wall portion 11 has the leading end of the drawer side surface 10b sandwiching the bottom surface 10a continuous with the large-diameter end 11a of the inclined wall 11. . The inclined wall portion 11 is provided with a bent portion 11c in which the inclination angle of the outer peripheral surface is changed between the large diameter end 11a and the small diameter end 11b. The inclination angle of the small diameter side portion 11d is larger than that of the bending portion 11c, and the inclination angle of the large diameter side 11e is smaller than that of the bending portion 11c.

前記傾斜壁部１１の傾斜角度を変えた外周面には、車体係止凹部１０の引出側面１０ｂの先端の大径端１１ａから小径端１１ｂにかけて軸線方向の段状の突条１５を周方向に一定間隔をあけて６本設けている。これらの突条１５は周方向に同一幅としているため、小径端から大径端に向けて放射状に延在する突条１５は小径側では周方向の間隔が狭くなり密に配置され、大径側では周方向間隔が広がっている。
前記屈曲部１１ｃでは突条１５を周方向の連続させた仮想外径を車体パネル２の貫通穴３の内径と同等としている。 On the outer peripheral surface of the inclined wall portion 11 where the inclination angle is changed, an axial stepped ridge 15 is provided in the circumferential direction from the large-diameter end 11a to the small-diameter end 11b at the tip of the drawer side surface 10b of the vehicle body locking recess 10. Six are provided at regular intervals. Since these ridges 15 have the same width in the circumferential direction, the ridges 15 that extend radially from the small diameter end toward the large diameter end are closely arranged with a small interval in the circumferential direction on the small diameter side. On the side, the circumferential interval is widened.
In the bent portion 11c, the virtual outer diameter in which the protrusions 15 are continuous in the circumferential direction is made equal to the inner diameter of the through hole 3 of the vehicle body panel 2.

前記突条１５の小径側端面１５ｂは引出先端側筒部１２の外周面と連続させている。
また、車体係止凹部１０の引出側面１０ｂの先端に位置する突条１５の大径端側では、図１に示すように、頂面１５ａの先端および両側の３面を傾斜させた３面カット部１５ｃとしている。また、突条１５に挟まれた傾斜壁部１１の外面には、突条１５の根元部分と中央部分とに軸線方向の溝１５ｋ、１５ｉを設けて、傾斜壁部１１を撓み易くしている。 The small diameter side end surface 15 b of the protrusion 15 is continuous with the outer peripheral surface of the leading end side cylindrical portion 12.
Further, on the large-diameter end side of the protrusion 15 located at the tip of the pull-out side surface 10b of the vehicle body locking recess 10, as shown in FIG. 1, the tip of the top surface 15a and the three surfaces cut on both sides are inclined. The part 15c is used. In addition, on the outer surface of the inclined wall portion 11 sandwiched between the ridges 15, axial grooves 15 k and 15 i are provided at the base portion and the central portion of the ridge 15 to make the inclined wall portion 11 flexible. .

図４に示すように、グロメット１に、ボンネット開放用のオープナーケーブル２１とウォッシャー用の給水ホース２２との２本の線材２０を貫通し、これら線材２０をエンジンルーム（Ｘ）から車室（Ｙ）へと配線している。これらの線材２０は押込側Ｐ１から引出側Ｐ２へとグロメット１に貫通させている。
オープナーケーブル２１をグロメット１に貫通させるため、傾斜壁部１１に貫通穴２４を設けると共に、給水ホース２２に貫通させるために貫通穴２５を設けている。貫通穴２４と２５とは直交方向に設けている。これらの貫通穴２４、２５は引出側の第１貫通穴となる。 As shown in FIG. 4, the grommet 1 passes through two wires 20, an opener cable 21 for opening the hood and a water supply hose 22 for the washer, and these wires 20 are passed from the engine room (X) to the vehicle compartment (Y ). These wires 20 are passed through the grommet 1 from the pushing side P1 to the drawing side P2.
In order to allow the opener cable 21 to pass through the grommet 1, a through hole 24 is provided in the inclined wall portion 11, and a through hole 25 is provided to pass through the water supply hose 22. The through holes 24 and 25 are provided in the orthogonal direction. These through holes 24 and 25 become the first through holes on the drawer side.

前記貫通穴２４、２５の周縁からそれぞれ外方へ突出したガイド用外管２６、２７を設けている。これらガイド用外管２６、２７は先端に閉鎖部２６ａ、２７ａを設けている。線材を貫通する時は閉鎖部２６ａ、２７ａを切断ライン２６ｂ、２７ｂで切断して開口し、線材を貫通させない時は閉鎖した状態としている。また、貫通穴２４、２５の周縁からグロメット内部へ突出したガイド用内管２８、２９を設けている。
前記ガイド用外管２６とガイド用内管２８は貫通穴２４を介して連通した直管状としている。同様に、前記ガイド用外管２７とガイド用内管２９は貫通穴２５を介して連通した直管状としている。 Guide outer pipes 26 and 27 projecting outward from the peripheral edges of the through holes 24 and 25 are provided. These guide outer tubes 26, 27 are provided with closed portions 26a, 27a at their tips. When penetrating the wire, the closed portions 26a, 27a are cut and opened by the cutting lines 26b, 27b, and when the wire is not penetrated, the closed portions 26a, 27a are closed. Further, guide inner pipes 28 and 29 projecting from the peripheral edges of the through holes 24 and 25 into the grommet are provided.
The guide outer tube 26 and the guide inner tube 28 are in a straight tube shape communicating with each other through the through hole 24. Similarly, the guide outer tube 27 and the guide inner tube 29 are straight pipes communicating with each other through the through hole 25.

前記オープナーケーブル２１のガイド用外管２６は突出側にオープナーケーブル２１の外径と同等の内径を有する小径のストレート管部２６ｃを設け、該ストレート管部２６ｃより突出側に切断ライン２６ｂを設定している。よって、切断した状態で、オープナーケーブル２１の外周面にストレート管部２６ｃがシール状態で密着してガイドするようにしている。 The guide outer tube 26 of the opener cable 21 is provided with a small straight tube portion 26c having an inner diameter equivalent to the outer diameter of the opener cable 21 on the protruding side, and a cutting line 26b is set on the protruding side from the straight tube portion 26c. ing. Therefore, the straight pipe portion 26c is in close contact with the outer peripheral surface of the opener cable 21 in a sealed state and guided in a cut state.

オープナーケーブル２１のガイド用内管２８の内径ｄ４はオープナーケーブル２１の外径ｄ３より大とし、挿入側の先端は開口としている。該ガイド用内管２８の内部に、内径をｄ３とした通し穴２８ａを設けたシール壁２８ｂを設けている。これにより、オープナーケーブル２１はグロメット１の内部でシール壁２８ｂによりシールされると共に支持される。かつ、グロメット１の外部のガイド用外管２６のストレート管部２６ｃでシールされると共に支持されるようにしている。 The inner diameter d4 of the guide inner tube 28 of the opener cable 21 is larger than the outer diameter d3 of the opener cable 21, and the distal end on the insertion side is an opening. Inside the guide inner tube 28, a seal wall 28b having a through hole 28a having an inner diameter d3 is provided. As a result, the opener cable 21 is sealed and supported by the seal wall 28 b inside the grommet 1. In addition, it is sealed and supported by the straight pipe portion 26 c of the outer guide pipe 26 outside the grommet 1.

一方、給水ホース２２側でも、ガイド用外管２７の切断ライン２７ｂより手前に小径の小径部２７ｃを設け、該小径部２７ｃを給水ホース２２の外周面に密着させてシールしている。また、ガイド用内管２９の２カ所に小径部２９ａ、２９ｂを設け、小径部２９ａ、２９ｂの内周面を給水ホース２２の外周面に密着させてシールしている。 On the other hand, on the water supply hose 22 side, a small-diameter small portion 27 c is provided in front of the cutting line 27 b of the guide outer tube 27, and the small-diameter portion 27 c is in close contact with the outer peripheral surface of the water supply hose 22 for sealing. Further, small diameter portions 29 a and 29 b are provided at two locations of the guide inner pipe 29, and the inner peripheral surfaces of the small diameter portions 29 a and 29 b are in close contact with the outer peripheral surface of the water supply hose 22 and sealed.

また、前記環状連結部６に、図１（Ｂ）に示すように、オープナーケーブル２１および給水ホース２２の貫通穴３１、３２を直交位置に設けており、該貫通穴３１、３２の位置は前記ガイド用内管２８、２９の先端開口と対向位置としている。これらの貫通穴３１、３２は線材挿入側の第２貫通穴となる。
前記環状連結部６を図示のようにＶ字状に屈曲させているが、前記貫通穴３１、３２を向けた部分は径方向に延在する平面部６ｅ、６ｆとしている。 Further, as shown in FIG. 1B, the annular connecting portion 6 is provided with through holes 31 and 32 of the opener cable 21 and the water supply hose 22 at orthogonal positions, and the positions of the through holes 31 and 32 are the above-described positions. The guide inner pipes 28 and 29 are opposed to the tip openings. These through holes 31 and 32 serve as second through holes on the wire insertion side.
The annular connecting portion 6 is bent in a V shape as shown in the figure, but the portions facing the through holes 31 and 32 are flat portions 6e and 6f extending in the radial direction.

前記のように、外筒８と内筒５とを連結する環状連結部６は、内筒５の外周面５ａと連続する内周端６ｂより押込側Ｐ１に向けて略Ｖ字状に傾斜させて突出している。該環状連結部６の外周端６ａは内周端６ｂより押込側Ｐ１に位置させて外筒８の厚肉部９と連結している。
即ち、前記図８に示す従来のワンモーション型グロメット１００では、拡径筒部の小径側を小径筒部と連続させていたのに対して、本発明のグロメットでは拡径筒部に対応する外筒８の大径側を環状連結部６を介して内筒５と連結している。 As described above, the annular connecting portion 6 that connects the outer cylinder 8 and the inner cylinder 5 is inclined in a substantially V shape from the inner peripheral end 6b continuous with the outer peripheral surface 5a of the inner cylinder 5 toward the pushing side P1. Protruding. The outer peripheral end 6 a of the annular connecting portion 6 is positioned on the pushing side P 1 from the inner peripheral end 6 b and is connected to the thick portion 9 of the outer cylinder 8.
That is, in the conventional one-motion grommet 100 shown in FIG. 8, the small diameter side of the enlarged diameter cylindrical portion is connected to the small diameter cylindrical portion, whereas in the grommet of the present invention, the outer diameter corresponding to the expanded diameter cylindrical portion is provided. The large diameter side of the cylinder 8 is connected to the inner cylinder 5 via the annular connecting portion 6.

環状連結部６の肉厚は内筒５の肉厚と略同等か若干薄くして撓みやすくしている。また、内筒５の外周面５ａと傾斜して連結する環状連結部６の連結部の角度θは２０度〜３０度としている。このように、内筒５と外筒８とを径方向に連結せずに、環状連結部６を傾斜させて内筒５と連結し、言わばエグリをいれた状態で連結している。これにより、内筒５がワイヤハーネスの曲げに追従して変形した時に環状連結部６で変形を吸収して、外筒８に直接的に変形を伝達しない逃げ部としている。 The wall thickness of the annular connecting portion 6 is substantially the same as or slightly thinner than the wall thickness of the inner cylinder 5 to facilitate bending. Further, the angle θ of the connecting portion of the annular connecting portion 6 that is connected to the outer peripheral surface 5a of the inner cylinder 5 at an angle is set to 20 degrees to 30 degrees. Thus, without connecting the inner cylinder 5 and the outer cylinder 8 in the radial direction, the annular connecting portion 6 is tilted and connected to the inner cylinder 5, so to speak, in a state where an acorn is inserted. Thereby, when the inner cylinder 5 is deformed following the bending of the wire harness, the annular coupling part 6 absorbs the deformation, and the escape part does not transmit the deformation directly to the outer cylinder 8.

環状連結部６には、内周端６ｂからＶ字の突出端６ｃとの間の傾斜部に前記傾斜壁部１１に向けて屈曲した屈曲部６ｄを設けている。該屈曲部６ｄに厚肉とした押しリブ１８を傾斜壁部１１に向けて突出している。該押しリブ１８は周方向に連続させ、図５に示すように、線材２０のガイド用内筒２８、２９の配置部では分割している。 The annular connecting portion 6 is provided with a bent portion 6d bent toward the inclined wall portion 11 at an inclined portion between the inner peripheral end 6b and the V-shaped protruding end 6c. A thick push rib 18 projects toward the inclined wall portion 11 at the bent portion 6d. The pushing ribs 18 are continuous in the circumferential direction, and are divided at the arrangement portions of the guide inner cylinders 28 and 29 of the wire 20 as shown in FIG.

前記押しリブ１８の肉厚は厚くし、環状連結部６の肉厚の２〜４倍としている。
押しリブ１８を厚肉としているのは、グロメット１を車体パネル２の貫通穴３に押し込む挿通作業時に、押しリブ１８の突出端１８ａが傾斜壁部１１の内周面に当接し、押し込み力を外筒８に伝達する役割を持たせていることによる。また、グロメット１を車体パネル２に取り付けた状態で、押しリブ１８の突出端１８ａは傾斜壁部１１の内周面と当接するように突出端１８ａと傾斜壁部１１の内周面に近接させている。これにより、押しリブ１８、内筒５、環状連結部６、外筒８に囲まれた遮音空間Ｂを形成できるようにしている。 The thickness of the pushing rib 18 is thick, and is 2 to 4 times the thickness of the annular connecting portion 6.
The pushing rib 18 is thick because the protruding end 18a of the pushing rib 18 abuts against the inner peripheral surface of the inclined wall portion 11 during the insertion operation of pushing the grommet 1 into the through hole 3 of the vehicle body panel 2. This is because the outer cylinder 8 has a role to transmit. Further, with the grommet 1 attached to the vehicle body panel 2, the protruding end 18 a of the push rib 18 is brought close to the protruding end 18 a and the inner peripheral surface of the inclined wall portion 11 so as to contact the inner peripheral surface of the inclined wall portion 11. ing. Thereby, the sound insulation space B surrounded by the push rib 18, the inner cylinder 5, the annular coupling portion 6, and the outer cylinder 8 can be formed.

前記押しリブ１８は図３および図６に示すように、外径方向に若干傾斜させて突出し、突出端１８ａは引出先端側筒部１２に連続する傾斜壁部１１の小径端側に対向させている。押しリブ１８が当接する傾斜壁部１１側には、引出先端側筒部１２に傾斜壁部１１より内方に突出させたストッパー用突起１２ａを設けている。該ストッパー用突起１２ａを設けていることにより、押しリブ１８の突出端１８ａが引出先端側筒部１２の内部に滑り落ちることを防止し、傾斜壁部１１と必ず接触して傾斜壁部１１に押し込み力を伝達できるようにしている。 As shown in FIGS. 3 and 6, the push rib 18 protrudes by being slightly inclined in the outer diameter direction, and the protruding end 18 a is opposed to the small diameter end side of the inclined wall portion 11 continuous with the leading end side cylindrical portion 12. Yes. On the inclined wall portion 11 side with which the push rib 18 abuts, a stopper projection 12a is provided on the leading end side cylindrical portion 12 so as to protrude inward from the inclined wall portion 11. By providing the stopper projection 12a, the protruding end 18a of the push rib 18 is prevented from sliding down into the inside of the leading end side cylinder portion 12, and is always brought into contact with the inclined wall portion 11 and pushed into the inclined wall portion 11. The power can be transmitted.

さらに、傾斜壁部１１には、前記押しリブ１８の突出端１８ａが当接する部分の外径側から前記屈曲部１１ｃに達するまでの内周面に浅い凹部を環状に設けて薄肉部１９を形成している。このように、傾斜壁部１１の屈曲部１１ｃから小径側に薄肉部１９を設けることで、引出先端側筒部１２がワイヤハーネスＷ／Ｈの曲げにより変形した際の応力吸収部としている。 Further, the inclined wall portion 11 is provided with a shallow concave portion on the inner peripheral surface from the outer diameter side of the portion where the protruding end 18a of the push rib 18 abuts to reach the bent portion 11c to form a thin portion 19. doing. In this way, by providing the thin portion 19 on the small diameter side from the bent portion 11c of the inclined wall portion 11, the leading end side cylindrical portion 12 serves as a stress absorbing portion when deformed by bending the wire harness W / H.

ワイヤハーネスＷ／Ｈを密着させて貫通する小径な内筒５は、外筒８の長さ方向の両端から突出させ、該突出した部分の内周面に間隔をあけて３カ所に防水用のリールリブ３３を突設している。 A small-diameter inner cylinder 5 that penetrates the wire harness W / H in close contact is projected from both ends in the length direction of the outer cylinder 8, and is waterproofed at three locations with an interval between the inner peripheral surfaces of the projected portions. A reel rib 33 is projected.

また、図６に示すように、グロメット１を取り付ける車体パネル２の貫通穴３は、貫通穴周縁３ａから押込側Ｐ１に向けたバーリング３ｂが突出したバーリング穴であるため、前記外筒８に設ける車体係止凹部１０は、該バーリング穴に対応した形状としている。 Further, as shown in FIG. 6, the through hole 3 of the vehicle body panel 2 to which the grommet 1 is attached is provided in the outer cylinder 8 because the burring 3 b is projected from the through hole peripheral edge 3 a toward the pushing side P 1. The vehicle body locking recess 10 has a shape corresponding to the burring hole.

前記グロメット１へのワイヤハーネスＷ／Ｈの取り付け方法は、内筒５の内周面を治具（図示せず）で拡大しながらワイヤハーネスＷ／Ｈの電線群を貫通させる。貫通後、内筒５の両端５Ｐ１と５Ｐ１から引き出されたワイヤハーネスＷ／Ｈと、両端５Ｐ１、５Ｐ２を粘着テープ４０を巻き付けて固着している。 The wire harness W / H is attached to the grommet 1 by causing the wire group of the wire harness W / H to penetrate while enlarging the inner peripheral surface of the inner cylinder 5 with a jig (not shown). After the penetration, the wire harness W / H drawn from both ends 5P1 and 5P1 of the inner cylinder 5 and the both ends 5P1 and 5P2 are fixed by winding the adhesive tape 40 around them.

内筒５に貫通するワイヤハーネスＷ／Ｈの外径の増減については環状連結部６で吸収し、該環状連結部６を介して内筒５と連結した外筒８に影響を殆ど及ぼさず、外筒８の外径を設計通りに保持できる。即ち、環状連結部６は薄肉として変形しやすくしていると共に、Ｖ形状としているため、径方向の増減に屈曲角度を変えるだけで対応できる。 The increase or decrease in the outer diameter of the wire harness W / H penetrating the inner cylinder 5 is absorbed by the annular connecting portion 6 and hardly affects the outer cylinder 8 connected to the inner cylinder 5 via the annular connecting portion 6. The outer diameter of the outer cylinder 8 can be maintained as designed. That is, since the annular connecting portion 6 is thin and easily deformed and has a V shape, it is possible to cope with the increase and decrease in the radial direction only by changing the bending angle.

ワイヤハーネスＷ／Ｈに取り付けたグロメット１は、図６に示すように、エンジンルーム（Ｘ）と車室（Ｙ）とを仕切る車体パネル２のバーリング３ｂを有する貫通穴３に通して取り付けている。
グロメット１の貫通穴３への挿入作業は、エンジンルーム（Ｘ）側から貫通穴３に内筒５の引出端５Ｐ２を挿入し、エンジンルーム（Ｘ）側から、グロメット１に取り付けてワイヤハーネスＷ／Ｈを作業員が持ってグロメット１を押し込んでいく。この一方側からの押し込み操作のみのワンモーションでグロメット１を貫通穴３に挿入係止している。 As shown in FIG. 6, the grommet 1 attached to the wire harness W / H is attached through the through hole 3 having the burring 3b of the vehicle body panel 2 that partitions the engine room (X) and the vehicle compartment (Y). .
The grommet 1 is inserted into the through-hole 3 by inserting the lead-out end 5P2 of the inner cylinder 5 into the through-hole 3 from the engine room (X) side and attaching the grommet 1 to the grommet 1 from the engine room (X) side. The operator holds / H and pushes grommet 1 in. The grommet 1 is inserted and locked into the through hole 3 with one motion only by pushing operation from one side.

詳細には、グロメット１の貫通穴３への挿通作業時に、外筒８の傾斜壁部１１の小径側の部分１１ｄは、貫通穴３の内径よりも小さいためにスムーズに挿入できる。傾斜壁部１１の屈曲部１１ｃが貫通穴の内周面３ａに達すると、傾斜壁部１１の突条１５が内周面３ａに接触した時点から、挿入抵抗が発生し、外筒８は貫通穴の内周面３ａから容易に押し込まれない。
しかしながら、内筒５の押込側Ｐ１から引き出されるワイヤハーネスＷ／Ｈを作業員が持って押し込み作業すると、ワイヤハーネスＷ／Ｈに密着した内筒５が引き出し方向のＰ２側に前進する。該内筒５の移動により、内筒５に連結した環状連結部６の押しリブ１８も外筒５の傾斜壁部１１の内面に向けて前進し、その突出端１８ａは傾斜壁部１１の内周面に突き当たる。このように、傾斜壁部１１が押しリブ１８により押されて前進するため、傾斜壁部１１を設けた外筒が貫通穴３を通して車室（Ｙ）側へと前進する。 Specifically, when the grommet 1 is inserted into the through hole 3, the small diameter portion 11 d of the inclined wall portion 11 of the outer cylinder 8 is smaller than the inner diameter of the through hole 3, so that it can be smoothly inserted. When the bent portion 11c of the inclined wall portion 11 reaches the inner peripheral surface 3a of the through hole, insertion resistance is generated from the time when the protrusion 15 of the inclined wall portion 11 contacts the inner peripheral surface 3a, and the outer cylinder 8 penetrates. It is not easily pushed from the inner peripheral surface 3a of the hole.
However, when the worker holds the wire harness W / H drawn from the pushing side P1 of the inner cylinder 5 and pushes it in, the inner cylinder 5 that is in close contact with the wire harness W / H moves forward to the P2 side in the pulling direction. By the movement of the inner cylinder 5, the pushing rib 18 of the annular coupling portion 6 connected to the inner cylinder 5 also moves forward toward the inner surface of the inclined wall portion 11 of the outer cylinder 5, and its protruding end 18 a is the inner wall of the inclined wall portion 11. Hit the surface. Thus, since the inclined wall portion 11 is pushed forward by the push rib 18, the outer cylinder provided with the inclined wall portion 11 moves forward through the through hole 3 toward the vehicle compartment (Y) side.

前記押しリブ１８により傾斜壁部１１を押し込んでいく時、その外周面に突条１５を設けているため、貫通穴の内周面３ａおよびバーリング３ｂの内周面と突条１５の頂面１５ａが接触するだけであるため、接触面積が減少され、挿入力を低減できる。さらに、突条１５の内周面に凹部１５ｈを設け、突条１５の剛性を低下して内方へ撓みやすくしているため、挿入力の低減を図ることができ、屈曲部１１ｃからの挿入力は過大とならない。 When the inclined wall portion 11 is pushed in by the push rib 18, the protrusion 15 is provided on the outer peripheral surface thereof, so that the inner peripheral surface 3 a of the through hole and the inner peripheral surface of the burring 3 b and the top surface 15 a of the protrusion 15 are provided. Since only contact is made, the contact area is reduced and the insertion force can be reduced. Furthermore, since the concave portion 15h is provided on the inner peripheral surface of the ridge 15, and the rigidity of the ridge 15 is reduced to facilitate bending inward, the insertion force can be reduced, and insertion from the bent portion 11c is possible. Power is not excessive.

前記のように車体パネル２にグロメット１が固定された後、図４に示すように、オープナーケーブル２１と給水ホース２２とをグロメット１に押込側Ｐ１から引出側Ｐ２へと貫通している。該貫通時には前以てガイド用外管２６、２７を切断ライン２６ｂ、２７ｂで切断して開口している。
オープナーケーブル２１および給水ホース２２は環状連結部の貫通穴３１、３２を通し、ガイド用内管２８、２９、貫通穴２４、２５、ガイド用外管２６、２７を夫々通してグロメット１に貫通している。この状態で、前記のように、オープナーケーブル２１および給水ホース２２は、それぞれ直管状に連続するガイド用内管とガイド用外管とによって、所要長さストレートに支持され、かつ、該ストレートの支持部の両側でシールされる。 After the grommet 1 is fixed to the vehicle body panel 2 as described above, as shown in FIG. 4, the opener cable 21 and the water supply hose 22 are passed through the grommet 1 from the pushing side P1 to the drawing side P2. At the time of the penetration, the guide outer tubes 26 and 27 are cut and opened by cutting lines 26b and 27b in advance.
The opener cable 21 and the water supply hose 22 pass through the grommets 1 through the through-holes 31 and 32 of the annular connecting portion, and through the guide inner pipes 28 and 29, the through holes 24 and 25, and the guide outer pipes 26 and 27, respectively. ing. In this state, as described above, the opener cable 21 and the water supply hose 22 are supported by the required length straight by the guide inner tube and the guide outer tube that are continuous in a straight tube shape, respectively, and support for the straight Sealed on both sides of the part.

また、車室（Ｙ）に引き出されたワイヤハーネスＷ／Ｈが９０度下向き（あるいは上向き、右向き、左向き）に急激に屈曲して配索される場合、ワイヤハーネスＷ／Ｈを密着して貫通すると共にテープ４０で固着された内筒５は、ワイヤハーネスＷ／Ｈの曲げに追従し、引出端５Ｐ２側では下向きに曲がることとなる。 In addition, when the wire harness W / H pulled out to the passenger compartment (Y) is bent 90 degrees downward (or upward, rightward, leftward) and routed, the wire harness W / H is closely attached and penetrated. At the same time, the inner cylinder 5 fixed with the tape 40 follows the bending of the wire harness W / H and bends downward on the drawing end 5P2 side.

この場合、本発明のグロメット１では、内筒５の引出端５Ｐ２が下向きに屈曲しても、外筒８は内筒５の引出端５Ｐ２側で連結しておらず、外筒８の引出先端側筒部１２と内筒５との間には大きな空間Ｓを存在させている。よって、内筒５は外筒８との間の空間Ｓ内で曲がるだけであり、外筒８の引出端側で曲げられない。このように、前記ケーブルおよびホースからなる線材の貫通穴２４、２５およびガイド用外管および内管を設けた外筒８の変形が防止されるため、これら線材のガイド部および線材も曲げられず、その間に隙間を発生させることはなく、より止水性能を確実なものとすることができる。
エンジンルーム側でワイヤハーネスが曲げられた場合も、Ｖ字状に屈曲した環状連結部６で変形を吸収でき、外筒８に変形の影響を及ぼさないため、前記線材の貫通ガイド部も変形せず、シール性を確保することができる。 In this case, in the grommet 1 of the present invention, even if the drawing end 5P2 of the inner cylinder 5 is bent downward, the outer cylinder 8 is not connected on the drawing end 5P2 side of the inner cylinder 5, and the leading end of the outer cylinder 8 is drawn. A large space S exists between the side tube portion 12 and the inner tube 5. Therefore, the inner cylinder 5 only bends in the space S between the outer cylinder 8 and is not bent at the drawing end side of the outer cylinder 8. Thus, since the deformation of the through-holes 24 and 25 of the wire consisting of the cable and the hose and the outer cylinder 8 provided with the guide outer tube and the inner tube is prevented, the guide portion and the wire of the wire are not bent. In addition, no gap is generated between them, and water stoppage performance can be further ensured.
Even when the wire harness is bent on the engine room side, deformation can be absorbed by the annular connecting portion 6 bent in a V shape, and the outer cylinder 8 is not affected by the deformation. Therefore, sealing performance can be ensured.

図７（Ａ）（Ｂ）に参考実施形態のグロメット１−１を示す。
図７（Ａ）に示すグロメット１−１は、前記図８（Ａ）のグロメット１００Ａと同様な形状で、引出側Ｐ２で傾斜壁部の小径端を内筒５０に連結した連結タイプのグロメットである。
前記第一実施形態の内筒に対応する小径筒部５０と、外筒に対応する拡径筒部５１の傾斜壁部５２の小径端とを連結している。傾斜壁部５２に線材２０の貫通穴５２ａを設け、該貫通穴５２ａから第一実施形態のガイド用外管２６と同形状のガイド用外管５３を突設し、かつ、第一実施形態のガイド用内管２８と同形状のガイド用内管５４を突設している。即ち、ガイド用外管５３にはシール部となるストレート管部５３ａを設け、ガイド用内管５４には通し穴を設けたシール壁５４ａを設けている。
第一実施形態と同一部分は同一符号を付して説明を省略する。 FIGS. 7A and 7B show the grommet 1-1 of the reference embodiment.
Grommet 1-1 shown in FIG. 7 (A) is a connection type grommet having a shape similar to that of grommet 100A in FIG. 8 (A), wherein the small-diameter end of the inclined wall portion is connected to inner cylinder 50 on drawer side P2. is there.
The small diameter cylinder part 50 corresponding to the inner cylinder of the first embodiment is connected to the small diameter end of the inclined wall part 52 of the enlarged diameter cylinder part 51 corresponding to the outer cylinder. A through hole 52a of the wire 20 is provided in the inclined wall portion 52, a guide outer pipe 53 having the same shape as the guide outer pipe 26 of the first embodiment is projected from the through hole 52a, and the first embodiment A guide inner pipe 54 having the same shape as that of the guide inner pipe 28 is projected. That is, the guide outer tube 53 is provided with a straight tube portion 53a serving as a seal portion, and the guide inner tube 54 is provided with a seal wall 54a provided with a through hole.
The same parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

図７（Ｂ）に示すグロメット１−２は前記図８（Ｂ）のグロメット１００Ｂと同様な形状で、引出側Ｐ２で傾斜壁部５２の小径端を内筒５０に連結し、かつ、大径側で閉鎖面部６０を介して分割した内筒６１と連結した連結タイプのグロメットである。
閉鎖面部６０に線材２０の貫通穴６８を設け、該貫通穴６０から第一実施形態のガイド用外管２６と同形状のガイド用外管６４を突設し、かつ、第一実施形態のガイド用内管２８と同形状のガイド用内管６５を突設している。即ち、ガイド用外管６４にはシール部となるストレート管部６４ａを設け、ガイド用内管６５には通し穴を設けたシール壁６５ａを設けている。
第一実施形態と同一部分は同一符号を付して説明を省略する。 The grommets 1-2 shown in FIG. 7B have the same shape as the grommets 100B shown in FIG. 8B, connect the small diameter end of the inclined wall portion 52 to the inner cylinder 50 on the drawer side P2, and have a large diameter. It is the connection type grommet connected with the inner cylinder 61 divided | segmented through the closed surface part 60 by the side.
A through hole 68 of the wire 20 is provided in the closing surface portion 60, a guide outer tube 64 having the same shape as the guide outer tube 26 of the first embodiment is projected from the through hole 60, and the guide of the first embodiment is provided. A guide inner tube 65 having the same shape as that of the inner tube 28 is provided. That is, the guide outer tube 64 is provided with a straight tube portion 64a serving as a seal portion, and the guide inner tube 65 is provided with a seal wall 65a provided with a through hole.
The same parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

前記図７（Ａ）（Ｂ）に示す参考実施形態の連結タイプのグロメット１−１、１−２のいずれにおいても、第一実施形態と同様に、直管状に連続するガイド用内管とガイド用外管とによって、所要長さストレートに支持され、かつ、該ストレートの支持部の両側でシールされる。よって、これらガイド用外管と内管を設けた傾斜壁部や閉鎖面部が内筒５０、６１が曲げられることにより変形しても、ガイド用外管と内管とは軸線方向が傾斜しても直管状に保持され、線材との間に隙間を発生させず、浸水の発生を防止できる。
なお、図７（Ａ）（Ｂ）はいずれも１本の線材の貫通部を図示しているが、第一実施形態と同様に、オープナーケーブルと給水ホースの２本の線材の貫通部を設けている。 In any of the connection type grommets 1-1 and 1-2 of the reference embodiment shown in FIGS. 7 (A) and 7 (B), as in the first embodiment, a guide inner tube and a guide that are continuous in a straight tube shape. The outer tube is supported in a straight length of a required length and is sealed on both sides of the straight support portion. Therefore, even if the inclined wall portion and the closed surface portion provided with the guide outer tube and the inner tube are deformed by bending the inner cylinders 50 and 61, the guide outer tube and the inner tube are inclined in the axial direction. Is also held in a straight tube shape , and no gap is formed between the wires and the occurrence of water immersion can be prevented.
7 (A) and 7 (B) both illustrate the penetration portion of one wire, but similarly to the first embodiment, the penetration portion of the two wires of the opener cable and the water supply hose is provided. ing.

本発明の第一実施形態のグロメットを示し、（Ａ）は引出側から見た斜視図、（Ｂ）は押込側から見た斜視図である。The grommet of 1st embodiment of this invention is shown, (A) is the perspective view seen from the drawer side, (B) is the perspective view seen from the pushing side. グロメットの引出側の側面図である。It is a side view of the drawer side of a grommet. 図２のＩＩＩ−ＩＩＩ線断面図である。It is the III-III sectional view taken on the line of FIG. 図２のＩＩ−ＩＩ線断面図である。It is the II - II sectional view taken on the line of FIG. 図３のＶ−Ｖ線断面図である。It is a sectional view taken along line V-V of Figure 3. 図２のＩＶ−ＩＶ線断面図としたグロメットにワイヤハーネスを貫通させ、車体に取り付けた状態を示す図面である。It is drawing which shows the state which penetrated the wire harness to the grommet made into the IV-IV sectional view of FIG. 2, and was attached to the vehicle body. （Ａ）（Ｂ）は参考実施形態のグロメットの断面図である。(A) (B) is sectional drawing of the grommet of reference embodiment. （Ａ）（Ｂ）は従来のグロメットを示す図面である。(A) (B) is drawing which shows the conventional grommet.

Explanation of symbols

１グロメット
２車体パネル
３貫通穴
５内筒
６環状連結部
８外筒
９厚肉部
１０車体係止凹部
１１傾斜壁部
１８押しリブ
２０線材
２１オープナーケーブル
２２給水ホース
２４、２５貫通穴（第一貫通穴）
２６、２７ガイド用外管
２８、２９ガイド用内管
３１、３２貫通穴（第二貫通穴） DESCRIPTION OF SYMBOLS 1 Grommet 2 Car body panel 3 Through-hole 5 Inner cylinder 6 Annular connection part 8 Outer cylinder 9 Thick part 10 Car body locking recessed part 11 Inclined wall part 18 Push rib 20 Wire material 21 Opener cable 22 Water supply hose 24, 25 Through hole (1st Through hole)
26, 27 Guide outer pipe 28, 29 Guide inner pipe 31, 32 Through hole (second through hole)

Claims

A grommet made of an elastic body that is externally attached to a wire harness that is inserted into a through hole provided in a vehicle body and penetrates a wire,
An inner cylinder penetrating through the wire harness of the wire harness; and
The outer cylinder is connected to the inner cylinder, and includes an outer cylinder having an enlarged diameter that is provided with a vehicle body engagement recess in the outer peripheral surface on the large diameter side,
An annular connecting portion protrudes from the outer periphery of the lengthwise intermediate portion sandwiched between the pushing side and the drawing side at both ends of the inner cylinder, and the thick portion of the outer cylinder is continuous with the outer peripheral end of the annular connecting portion. An inclined wall portion is continued from the thick wall portion, the vehicle body locking recess is provided at the boundary between the thick wall portion and the inclined wall portion, and the small diameter end side of the inclined wall portion opens a space from the inner cylinder. The drawer side of the inner cylinder protrudes outward from the inclined wall portion,
A first through hole of a wire is provided on the small diameter side of the inclined wall portion of the outer cylinder , and the guide outer pipe and the guide inner pipe projecting outward and inward from the peripheral edge of the first through hole are formed in a straight tube shape. Provided in communication, the guide inner pipe is provided between the inclined wall portion and the inner cylinder,
A seal wall having a through hole equivalent to the outer diameter of the wire rod from a part of the inner surface of the guide inner pipe while allowing the inner diameter of the guide outer tube to pass through in a sealed state with the outer diameter of the wire rod being equal. And projecting the wire rod through the through hole of the seal wall, and sealing the wire rod penetrating from the guide inner tube to the guide outer tube through the first through hole at two positions spaced apart from each other. The annular connecting portion is bent in a V shape, and a second through hole of the wire is provided in the annular connecting portion, and a portion where the second through hole of the wire is provided is orthogonal to the axial direction. Grommet characterized by having a flat surface .

The push rib is provided so as to project from the annular connecting portion toward the inner surface of the inclined wall portion, and the first through hole is provided on the outer diameter side from the position of the inclined wall portion with which the push rib abuts. The grommet described.

A grommet made of an elastic body that is externally attached to a wire harness that is inserted into a through hole provided in a vehicle body and penetrates a wire,
An inner cylinder penetrating through the wire harness of the wire harness; and
The outer cylinder is connected to the inner cylinder, and includes an outer cylinder having an enlarged diameter that is provided with a vehicle body engagement recess in the outer peripheral surface on the large diameter side,
An annular connecting portion protrudes from the outer periphery of the lengthwise intermediate portion sandwiched between the pushing side and the drawing side at both ends of the inner cylinder, and the thick portion of the outer cylinder is continuous with the outer peripheral end of the annular connecting portion. An inclined wall portion is continued from the thick wall portion, the vehicle body locking recess is provided at the boundary between the thick wall portion and the inclined wall portion, and the small diameter end side of the inclined wall portion opens a space from the inner cylinder. The drawer side of the inner cylinder protrudes outward from the inclined wall portion,
A first through hole of a wire is provided on the small diameter side of the inclined wall portion of the outer cylinder, and the guide outer pipe and the guide inner pipe projecting outward and inward from the peripheral edge of the first through hole are formed in a straight tube shape. Provided in communication, the guide inner pipe is provided between the inclined wall portion and the inner cylinder,
A seal wall having a through hole equivalent to the outer diameter of the wire rod from a part of the inner surface of the guide inner pipe while allowing the inner diameter of the guide outer tube to pass through in a sealed state with the outer diameter of the wire rod being equal. And projecting the wire rod through the through hole of the seal wall, and sealing the wire rod penetrating from the guide inner tube to the guide outer tube through the first through hole at two positions spaced apart from each other. Further, a push rib is projected from the annular connecting portion toward the inner surface of the inclined wall portion, and the first through hole is provided on the outer diameter side from the position of the inclined wall portion with which the push rib abuts. Grommet characterized by being .

The wire consists of an opener cable for opening the bonnet and a water supply hose for the washer.
The guide outer tube protrudes from the periphery of the first through-hole while reducing the diameter, and a straight tube portion having an inner diameter equivalent to the outer diameter of the wire rod is protruded from the reduced-diameter end. And cutting the closed end to penetrate the wire,
The tip of the said guide inner pipe provided between the said inner cylinder and an outer cylinder is made into the opening end, and the said seal wall is provided in the inside away from a required dimension from this opening end . The grommet of any one of Claims .