JP5115417B2

JP5115417B2 - Grommet

Info

Publication number: JP5115417B2
Application number: JP2008237164A
Authority: JP
Inventors: 大樹永易
Original assignee: Sumitomo Wiring Systems Ltd
Current assignee: Sumitomo Wiring Systems Ltd
Priority date: 2008-09-16
Filing date: 2008-09-16
Publication date: 2013-01-09
Anticipated expiration: 2028-09-16
Also published as: JP2010074893A

Description

本発明は、車両に配索するワイヤハーネスを貫通させて取り付けるグロメットであって、特に、前記ワイヤハーネスの貫通作業性を高める構成としているものである。 The present invention is a grommet that penetrates and attaches a wire harness that is routed to a vehicle, and particularly has a configuration that improves the penetration workability of the wire harness.

従来、自動車等の車両に配索されるワイヤハーネスは、例えば、被水領域のエンジンルームから非被水領域の車室を仕切る車体の貫通穴を通す部位に、ゴムまたはエラストマーからなるグロメットを取り付け、該グロメットを前記貫通穴の周縁に密嵌することでワイヤハーネスが貫通穴の周縁と接触して損傷を受けることを防止し、かつ、防塵や防水を図っている。
この種のグロメットは、ワイヤハーネスを密着して貫通させる小径筒部と、貫通穴の周縁に密嵌する車体係止凹部を環状に設けた大径筒部を連続して設けている。前記小径筒部はワイヤハーネスへの密着性を高めるために、貫通させるワイヤハーネスの外径より小径筒部の内径を大幅に小さく設定している。 Conventionally, a wire harness routed in a vehicle such as an automobile has a grommet made of rubber or elastomer attached to a portion that passes through a through hole of a vehicle body that partitions a vehicle compartment in a non-water-proof region from an engine room in a water-proof region, for example. By closely fitting the grommet to the periphery of the through hole, the wire harness is prevented from coming into contact with the periphery of the through hole and being damaged, and dust and water resistance are achieved.
This type of grommet is continuously provided with a small-diameter cylindrical portion that allows the wire harness to closely pass therethrough and a large-diameter cylindrical portion that is provided with an annular body-locking recess that is closely fitted to the periphery of the through hole. In order to improve the adhesion to the wire harness, the inner diameter of the small-diameter cylindrical portion is set to be significantly smaller than the outer diameter of the wire harness to be penetrated.

よって、前記小径筒部にワイヤハーネスを貫通させる際に、拡げ治具を用いて小径筒部の中空部を拡げた状態でワイヤハーネスの貫通作業を行い、貫通後は拡げ治具を小径筒部から取り外している。
この種の拡げ治具として、従来、特開平１１−２１５６５９号公報に開示されている拡げ治具（通し治具）が用いられる。該拡げ治具１００は、図７に示すように、９０度間隔で平行配置する４本の拡開爪１００ａをリンク手段で近接離反させる構成としている。該拡げ治具１００の拡開爪１００ａを互いに近接した閉じた状態でグロメット１１０の小径筒部１１０ａの中空部に挿入し、挿入後に拡開爪１００ａをリンク手段で離反させて拡げ、小径筒部１１０ａの周壁を押し広げて中空部を拡大している。この状態でワイヤハーネスＷ／Ｈを小径筒部１１０ａおよび大径筒部１１０ｃの中空部に貫通させ、貫通後に拡開爪１００ａを小径筒部１１０ａから抜き取っている。 Therefore, when penetrating the wire harness through the small-diameter cylindrical portion, the wire harness is penetrated in a state where the hollow portion of the small-diameter cylindrical portion is expanded using an expansion jig, and after the penetration, the expansion jig is inserted into the small-diameter cylindrical portion. It has been removed from.
Conventionally, an expansion jig (through jig) disclosed in Japanese Patent Application Laid-Open No. 11-215659 is used as this type of expansion jig. As shown in FIG. 7, the expansion jig 100 is configured such that four expansion claws 100a arranged in parallel at intervals of 90 degrees are brought close to and separated by a link means. The expansion claw 100a of the expansion jig 100 is inserted into the hollow portion of the small diameter cylindrical portion 110a of the grommet 110 in a closed state close to each other, and after the insertion, the expansion claw 100a is separated and expanded by the link means. The hollow part is expanded by pushing and expanding the peripheral wall of 110a. In this state, the wire harness W / H is penetrated through the hollow portions of the small-diameter cylindrical portion 110a and the large-diameter cylindrical portion 110c, and the expanded claw 100a is extracted from the small-diameter cylindrical portion 110a after the penetration.

特開平１１−２１５６５９号公報JP 11-215659 A

前記ワイヤハーネスの貫通後に小径筒部１１０ａから拡開爪１００ａを抜き取る作業が非常に困難となっている。該抜き取り作業時、拡開爪１００ａはグロメット１１０の小径筒部１１０ａの周壁内面に強い力で密着しているため、拡開爪１００ａを開いた状態から閉じるように狭めている。この状態で、拡げ治具は作業台に固定されているため、グロメットとワイヤハーネスとを作業員が持って引っ張ることで、小径筒部１１０ａから拡開爪１００ａを抜き取っている。 The operation of pulling out the expanding claws 100a from the small-diameter cylindrical portion 110a after the wire harness has passed is very difficult. At the time of the extraction operation, the expanding claws 100a are in close contact with the inner surface of the peripheral wall of the small-diameter cylindrical portion 110a of the grommet 110, so that the expanding claws 100a are narrowed so as to be closed from the opened state. In this state, since the expansion jig is fixed to the workbench, the operator holds the grommet and the wire harness and pulls the expansion claw 100a from the small diameter cylindrical portion 110a.

前記拡開爪１００ａの抜き取り作業時に、小径筒部１１０ａの周壁の内周面とワイヤハーネスＷ／Ｈの外周面の間に挟まり、抜き取りに強い力でグロメット１１０およびワイヤハーネスＷ／Ｈを引っ張る必要がある。この引っ張り時に拡開爪１００ａが内周側に位置するワイヤハーネスＷ／Ｈの電線群と干渉して電線群に損傷が生じる恐れがある。また、外周側に位置するグロメット１１０にも損傷が生じ、グロメットに亀裂や割れを発生させる。 It is necessary to pull the grommet 110 and the wire harness W / H with a force strong against extraction during the extraction operation of the expanding claws 100a between the inner peripheral surface of the peripheral wall of the small diameter cylindrical portion 110a and the outer peripheral surface of the wire harness W / H. There is. At the time of this pulling, the expanding claws 100a may interfere with the wire group of the wire harness W / H located on the inner peripheral side, and the wire group may be damaged. Further, the grommet 110 located on the outer peripheral side is also damaged, and the grommet is cracked or broken.

さらに、拡げ治具で小径筒部を拡げる作業時においても、小径筒部の内径を小さくしているため、拡開爪１００ａが小径筒部１１０ａの中空部に挿入しずらい問題もある。そのため、拡開爪１００ａに潤滑剤を塗布している場合があり、作業工数が増加する問題がある。
拡開爪１００ａを小径筒部１１０ａに挿入しやすくするため細くすると折れやすくなり、ワイヤハーネスの貫通作業時に拡開爪に折れが発生すると、折れた部分が飛んで作業員が怪我をする恐れがある。そのため、拡開爪を細くすることも出来ない問題がある。 Further, even during the operation of expanding the small-diameter cylindrical portion with the expansion jig, since the inner diameter of the small-diameter cylindrical portion is reduced, there is a problem that it is difficult to insert the expanding claw 100a into the hollow portion of the small-diameter cylindrical portion 110a. Therefore, there is a case where a lubricant is applied to the expanding claws 100a, and there is a problem that the number of work steps increases.
If the expansion claw 100a is thinned so that it can be easily inserted into the small-diameter cylindrical portion 110a, it becomes easy to break. If the expansion claw is broken during the wire harness penetration operation, the broken portion may fly and the worker may be injured. is there. Therefore, there is a problem that the expanding claws cannot be thinned.

本発明は、前記問題に鑑みてなされたもので、ワイヤハーネスに密着させるグロメットの小径筒部を、簡単に拡げることができ、貫通作業後に拡開爪をワイヤハーネスおよびグロメットに損傷を与えることなく簡単に抜き取れるグロメットを提供することを課題としている。 The present invention has been made in view of the above problem, and can easily expand the small-diameter cylindrical portion of the grommet to be in close contact with the wire harness without damaging the wire harness and the grommet after the penetrating operation. The challenge is to provide a grommet that can be easily extracted.

前記課題を解決するため、本発明は、小径筒部の一端に拡径筒部が連続し、該拡径筒部の大径側外周面に環状の車体係止凹部を備えた弾性材からなり、車両用のワイヤハーネスに外装するグロメットであって、
前記小径筒部を囲む前記拡径筒部の小径側に周方向に間隔をあけて３個または４個の拡開爪挿入筒を設け、これらの拡開爪挿入筒の前記小径筒部に沿った部分を小径筒部の外周面に周方向に間隔をあけて一体化させて拡径筒部より突出させると共に、突出端は閉鎖部とし、
ワイヤハーネスの貫通作業時に、前記拡径筒部の大径側開口より拡げ治具の３本または４本の拡開爪を１本ずつ前記拡開爪挿入筒に通し、これら拡開爪を互いに離反方向に拡げて前記小径筒部を拡げる構成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。 In order to solve the above-mentioned problems, the present invention comprises an elastic material in which a large-diameter cylindrical portion is continuous with one end of a small-diameter cylindrical portion, and an annular vehicle body engagement concave portion is provided on the large-diameter side outer peripheral surface of the large-diameter cylindrical portion. , A grommet to be mounted on a vehicle wire harness,
Three or four widening claw insertion cylinders are provided on the small diameter side of the large diameter cylindrical part surrounding the small diameter cylindrical part at intervals in the circumferential direction, and along the small diameter cylindrical part of these widening claw insertion cylinders The outer peripheral surface of the small-diameter cylindrical part is integrated with an interval in the circumferential direction and protruded from the enlarged-diameter cylindrical part, and the protruding end is a closed part,
When penetrating the wire harness, three or four expansion claws of the expansion jig are passed through the expansion claw insertion cylinder one by one from the large diameter side opening of the expansion cylinder portion, and the expansion claws are mutually connected. There is provided a grommet characterized in that the small diameter cylindrical portion is expanded in the separating direction.

本発明のグロメットは、電線群の貫通作業時に小径筒部の中空部に拡げ治具の複数の拡開爪を挿入するのではなく、小径筒部に連続する拡径筒部から小径筒部の外周に周方向に間隔をあけて突設した拡開爪挿入筒に拡げ治具の拡開爪挿入筒に１本ずつ挿入している。この状態で拡開爪を互いに離反させて拡げていくと、各拡開爪挿入筒を小径筒部の外周に周方向に間隔をあけて一体化させているため、該小径筒部を無理なく拡げていくことができる。
この小径筒部を拡げた状態で、該小径筒部および拡径筒部の中空部に電線群を貫通させると、電線群の貫通作業を容易に行うことができる。
また、電線群を貫通させた後、拡開爪を互いに近接させて閉じてグロメットから抜き取る際、拡開爪は電線群を挿通した小径筒部の中空部を通しておらず、よって電線群と接触しない。かつ、拡径筒部の中空部内においても電線群の外周側に拡開爪を通しているため、強く密着せず、グロメットおよび電線群を強い力で引っ張る必要はない。かつ、該抜き取り作業時にグロメットおよび電線群に損傷を発生させることを防止できる。 The grommet of the present invention does not insert a plurality of expanding claws of the expanding jig into the hollow portion of the small-diameter cylindrical portion during the penetration operation of the electric wire group, but from the large-diameter cylindrical portion to the small-diameter cylindrical portion. One expansion jig is inserted into each of the expansion claw insertion cylinders projecting from the outer circumference at intervals in the circumferential direction. In this state, when the expanding claws are separated from each other and expanded, the respective expanding claw insertion cylinders are integrated with the outer periphery of the small diameter cylindrical part at intervals in the circumferential direction. It can be expanded.
If the electric wire group is passed through the small diameter cylindrical portion and the hollow portion of the enlarged diameter cylindrical portion in a state where the small diameter cylindrical portion is expanded, the penetration operation of the electric wire group can be easily performed.
Also, after passing through the wire group, when the expansion claws are closed close to each other and pulled out from the grommet, the expansion claws do not pass through the hollow part of the small-diameter cylindrical portion through which the wire group is inserted, and thus do not contact the wire group . In addition, since the expanding claws are passed through the outer peripheral side of the electric wire group even in the hollow portion of the enlarged diameter cylindrical portion, it is not tightly attached and there is no need to pull the grommet and the electric wire group with a strong force. And it can prevent generating a damage to a grommet and an electric wire group at the time of this extraction operation.

さらに、拡開爪挿入筒の小径筒部と連続させて外方に突出する先端は閉鎖部としているため、浸水の発生はない。
さらにまた、拡開爪挿入筒の内径を小さくしても、拡げ治具の拡開爪をそれぞれ通す専用穴としているため、拡開爪の挿入を容易にでき、従来行われていた潤滑剤の塗布を不要とすることができる。
そのうえ、拡開爪が作業中に折れても、拡開爪挿入筒に挿入されているため、折れた破片が飛ばず、作業者の安全性に寄与できる。 Furthermore, since the front end that protrudes outward continuously from the small-diameter cylindrical portion of the expanding claw insertion cylinder is a closed portion, there is no inundation.
Furthermore, even if the inner diameter of the expansion claw insertion cylinder is reduced, the dedicated holes through which the expansion claw of the expansion jig is passed can be easily inserted. Application can be made unnecessary.
In addition, even if the expanding claw is broken during the work, it is inserted into the expanding claw insertion tube, so that the broken pieces do not fly and can contribute to the safety of the operator.

前記小径筒部の外周面に周方向に間隔をあけて設ける拡開爪挿入筒を繋ぐ周方向リブを小径筒部の外周面から突設していることが好ましい。
前記周方向リブを設けると、拡開爪挿入筒が拡開爪により拡げられると、拡開爪挿入筒の間の周方向リブも追従して開き方向に移動し、小径筒部の全周を均等に無理なく拡げていくことができる。 It is preferable that a circumferential rib for connecting an expansion claw insertion tube provided at a circumferential interval on the outer peripheral surface of the small diameter cylindrical portion is provided so as to protrude from the outer peripheral surface of the small diameter cylindrical portion.
When the circumferential rib is provided, when the expansion claw insertion cylinder is expanded by the expansion claw, the circumferential rib between the expansion claw insertion cylinders also follows and moves in the opening direction, and the entire circumference of the small-diameter cylindrical portion is moved. It can be expanded evenly.

前記拡開爪挿入筒の先端の閉鎖部は切除して、オープナーケーブルおよび給水ホースの挿通穴にできるようにしている。
即ち、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装着したワイヤハーネスを貫通する際、前記グロメットには、ボンネット開き用のオープナーケーブルやフロントガラス洗浄用の給水ホースがグロメットに貫通される場合が多い。この場合、グロメットに電線群の挿通作業を終了して、前記拡開爪をグロメットより抜き出した後に、オープナーケーブルおよび給水ホースをグロメットに通す場合には、拡開爪挿入筒の先端の閉鎖部を切除すると、オープナーケーブルおよび給水ホースの挿通穴として利用することができる。
また、後工程でグロメットを通す電線があれば、該電線の挿通穴とすることもできる。 The closing part at the tip of the expanding claw insertion tube is cut off so that it can be used as an insertion hole for the opener cable and the water supply hose.
That is, when a wire harness with a grommet installed in the through hole of the vehicle body panel that separates the engine room from the vehicle compartment is passed through the grommet, an opener cable for opening the bonnet and a water supply hose for cleaning the front glass penetrate the grommet. Often done. In this case, after finishing the insertion work of the electric wire group in the grommet and extracting the expansion claw from the grommet, when passing the opener cable and the water supply hose through the grommet, the closing portion at the tip of the expansion claw insertion cylinder is When excised, it can be used as an insertion hole for the opener cable and water supply hose.
Moreover, if there is an electric wire through which the grommet is passed in a subsequent process, it can be used as an insertion hole for the electric wire.

前記拡径筒部の内部に突出させた内部小径筒部を前記小径筒部に連続させて設け、前記拡開爪挿入筒に連続する先端開口の拡開爪用内側挿入筒を前記内部小径筒部の外面と連結させて設けていることが好ましい。 An internal small-diameter cylindrical portion protruding inside the large-diameter cylindrical portion is provided continuously to the small-diameter cylindrical portion, and an inner insertion tube for an expansion claw having a distal end opening continuous with the expansion claw insertion tube is provided as the internal small-diameter tube. It is preferable to connect with the outer surface of the part.

前記のように、拡径筒部内に内部小径筒部を連続して突出しているグロメットにおいて、該内部小径筒部に拡開爪用内側挿通筒を連続させておくと、拡径筒部より外方に突出した前記小径筒部を開く時に内部小径筒部も同時に開くことができる。さらに、細長い拡開爪を前記拡開爪用内側挿通筒と外側に突出した拡開爪挿入筒に挿通するため、安定した状態で保持できる。 As described above, in the grommet in which the inner small-diameter cylindrical portion continuously protrudes in the enlarged-diameter cylindrical portion, if the inner insertion cylinder for the expansion claw is continuously provided in the inner small-diameter cylindrical portion, When opening the small-diameter cylindrical portion protruding in the direction, the internal small-diameter cylindrical portion can be opened simultaneously. Further, since the elongated widening claw is inserted into the widening claw inner insertion tube and the widening claw insertion tube protruding outward, it can be held in a stable state.

前述したように、本発明のグロメットは、ワイヤハーネスの貫通作業時に、ワイヤハーネスの電線群に密着させる小径筒部の外面に周方向に間隔をあけて設けた拡げ治具の拡開爪挿入筒に拡開爪を１本ずつ挿入し、これら拡開爪を互いに離反方向へ移動させてグロメットの小径筒部を外部から引っ張って拡げている。即ち、従来の小径筒部の中空部に拡開爪を挿入し、内部から押し拡げず、電線群と接触しない小径筒部の外方から引っ張っている。
よって、拡開爪の抜き取り時に、ワイヤハーネスの電線群と密着していないために、拡開爪を容易に抜き取ることができ、ワイヤハーネスおよびグロメットに損傷を発生させることを防止できる等の種々の利点を有する。 As described above, the grommet of the present invention is an expansion claw insertion cylinder of an expansion jig provided at an interval in the circumferential direction on the outer surface of a small-diameter cylinder part to be in close contact with the wire group of the wire harness during the penetration operation of the wire harness. One widening claw is inserted into each of the two, and the widening claws are moved away from each other to pull the small-diameter cylindrical portion of the grommet from the outside. That is, the expansion claw is inserted into the hollow portion of the conventional small-diameter cylindrical portion, and is pulled from the outside of the small-diameter cylindrical portion that does not push out from the inside and does not contact the electric wire group.
Therefore, since the expansion claw is not in close contact with the electric wire group of the wire harness, it is possible to easily extract the expansion claw and to prevent the wire harness and the grommet from being damaged. Have advantages.

以下、本発明のグロメットの実施形態を図１乃至図５を参照して説明する。
グロメット１はゴムまたはエラストマーからなる弾性材料で一体成形しており、自動車のエンジンルームから車室へと配索するワイヤハーネス１０に外装し、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装着されるものである。 Hereinafter, embodiments of the grommet of the present invention will be described with reference to FIGS. 1 to 5.
The grommet 1 is integrally formed of an elastic material made of rubber or elastomer, and is externally mounted on a wire harness 10 that is routed from the engine room of the automobile to the passenger compartment. In the through hole of the vehicle body panel that partitions the engine compartment and the passenger compartment. It is to be attached.

グロメット１は図１および図２に示すように、小径筒部２の一端に拡径筒部３の小径端が連続し、該拡径筒部３の大径側外周面に環状の車体係止凹部４を備えている。小径筒部２は貫通させるワイヤハーネス１０の外径より小さく形成しており、ワイヤハーネス１０の貫通作業時には拡げ治具２０で小径筒部２を拡げてワイヤハーネス１０を貫通させるものとしている。 As shown in FIGS. 1 and 2, the grommet 1 has a small-diameter end of the small-diameter cylindrical portion 2 that is connected to the small-diameter end of the large-diameter cylindrical portion 3. A recess 4 is provided. The small-diameter cylindrical portion 2 is formed to be smaller than the outer diameter of the wire harness 10 to be penetrated, and when the wire harness 10 is penetrated, the small-diameter cylindrical portion 2 is expanded by the expansion jig 20 to penetrate the wire harness 10.

前記小径筒部２には、拡径筒部３の内部に突出する内部小径筒部５を連続して設け、該内部小径筒部５の外周面と拡径筒部３の小径側内周面との間に周方向に間隔をあけて支持壁６を連結して設けている。
また、拡径筒部３の大径端側には内周面から閉鎖壁７を突設し、該閉鎖壁７の中央部に直径方向のスリット７ａを設けて２分割し、該スリット７ａの中央にワイヤハーネスの貫通穴８を設け、該貫通穴８の周縁より半割れ状としたテープ巻き舌片８ａ（８ａ−１、８ａ−２）を設けている。また、該テープ巻き舌片８ａを囲む外周に等間隔をあけて治具挿入穴９（９Ａ〜９Ｄ）を設けている。 The small-diameter cylindrical portion 2 is continuously provided with an internal small-diameter cylindrical portion 5 that protrudes into the large-diameter cylindrical portion 3, and an outer peripheral surface of the internal small-diameter cylindrical portion 5 and a small-diameter side inner peripheral surface of the large-diameter cylindrical portion 3. The supporting wall 6 is connected and provided with a gap in the circumferential direction.
Further, a closed wall 7 projects from the inner peripheral surface on the large diameter end side of the enlarged diameter cylindrical portion 3, and a diametrical slit 7a is provided in the central portion of the closed wall 7 to divide it into two, and the slit 7a A through-hole 8 of the wire harness is provided in the center, and tape-wrapped tongue pieces 8a (8a-1, 8a-2) that are formed in a half-cracked shape from the periphery of the through-hole 8 are provided. In addition, jig insertion holes 9 (9A to 9D) are provided at equal intervals on the outer periphery surrounding the tape winding tongue piece 8a.

前記拡径筒部３には、小径筒部２との連続側の根元部分に周方向に等間隔をあけて４個の拡開爪挿入筒１３（１３Ａ〜１３Ｄ）を突設している。これら拡開爪挿入筒１３は、拡径筒部３と連続する部分は貫通穴１２（１２Ａ〜１２Ｂ）となり、該貫通穴１２の周縁より小径筒部２の外周に沿って軸方向に延在させている。小径筒部２に沿った部分１３ａは小径筒部２の外周面と一体化し、先端は閉鎖部１３ｂとしている。
前記拡開爪挿入筒１３は小径筒部２の長さ方向の略中央まで延長させ、かつ、先端側の閉鎖部１３ｂを含めた部分は肉厚ｔを薄くしている。これにより、小径筒部２に貫通させたワイヤハーネス１０と小径筒部１２の先端側とに粘着テープを巻き付けて固着する際に、拡開爪挿入筒１３の先端側を偏平化しやすくしている。 The expanded diameter cylindrical portion 3 is provided with four expanded claw insertion cylinders 13 (13A to 13D) protruding at equal intervals in the circumferential direction at the base portion on the continuous side with the small diameter cylindrical portion 2. These expanded claw insertion cylinders 13 have through-holes 12 (12 </ b> A to 12 </ b> B) that are continuous with the enlarged-diameter cylindrical part 3, and extend in the axial direction along the outer periphery of the small-diameter cylindrical part 2 from the periphery of the through-hole 12. I am letting. A portion 13a along the small-diameter cylindrical portion 2 is integrated with the outer peripheral surface of the small-diameter cylindrical portion 2, and the tip is a closed portion 13b.
The expanding claw insertion cylinder 13 is extended to substantially the center in the length direction of the small diameter cylinder part 2, and the thickness t of the part including the closing part 13b on the distal end side is made thin. Thereby, when the adhesive tape is wound around and fixed to the wire harness 10 penetrated through the small-diameter cylindrical portion 2 and the distal end side of the small-diameter cylindrical portion 12, the distal end side of the expanding claw insertion cylinder 13 is easily flattened. .

さらに、４つの拡開爪挿入筒１３を繋ぐ４本の周方向リブ１４を小径筒部２の外周面から突設している。 Further, four circumferential ribs 14 that connect the four expanding claw insertion cylinders 13 project from the outer peripheral surface of the small diameter cylinder part 2.

また、前記４つの拡開爪挿入筒１３の中空部となる前記貫通穴１２の周縁内面より、拡径筒部３内に延在する拡開爪内側挿入筒１５（１５Ａ〜１５Ｄ）を設け、前記外方に延在させる拡開爪挿入筒１３と連通させている。これら拡開爪内側挿入筒１５は前記内部小径筒部５と支持壁６との境界位置に介設した状態で設け、内部小径筒部５と支持壁６との沿った部分は、これら内部小径筒部５および支持壁６と一体化している。該拡開爪内側挿入筒１５の先端は開口１５ａとし、前記大径端側に設けた治具挿入穴９と対向する位置に前記開口１５ａを位置させている。 Moreover, the expansion claw inner insertion cylinder 15 (15A-15D) extended in the diameter expansion cylinder part 3 from the peripheral inner surface of the said through-hole 12 used as the hollow part of the said 4 expansion claw insertion cylinder 13 is provided, It communicates with the expanding claw insertion tube 13 extending outward. These widening claw inner insertion cylinders 15 are provided in a state of being interposed at the boundary position between the internal small diameter cylindrical part 5 and the support wall 6, and a portion along the internal small diameter cylindrical part 5 and the support wall 6 is provided with these internal small diameters The tube portion 5 and the support wall 6 are integrated. The distal end of the expanding claw inner insertion cylinder 15 is an opening 15a, and the opening 15a is located at a position facing the jig insertion hole 9 provided on the large diameter end side.

図３（Ａ）（Ｂ）は拡げ治具２０を示し、該拡げ治具２０は従来から用いられている拡げ治具で、従来は小径筒部２の中空部に挿入されていたものである。
該拡げ治具２０は作業台３０上に固定され、周方向に間隔をあけて平行に配置する４本の棒状の拡開爪２１（２１Ａ〜２１Ｄ）をリンク２２で連結して、４本の拡開爪２１を近接離反作動させる構成とされている。これら４本の拡開爪２１は、先端を鋭角状に突出させ、拡開爪用内側挿入筒１５の開口１５ａから挿入しやすくしている。 3 (A) and 3 (B) show an expansion jig 20, which is a conventional expansion jig that has been inserted into the hollow portion of the small-diameter cylindrical portion 2. .
The expansion jig 20 is fixed on a work table 30 and is connected to four rod-shaped expansion claws 21 (21A to 21D) arranged in parallel at intervals in the circumferential direction by links 22. It is set as the structure which makes the expansion nail | claw 21 approach / separate. These four widening claws 21 are projected at an acute angle to facilitate insertion through the opening 15a of the widening claw inner insertion cylinder 15.

前記グロメット１は小径筒部２から車体パネル（図示せず）の貫通穴に一方向から挿入すると、車体係止凹部４が貫通穴に嵌合できるワンモーショングロメットであり、拡径筒部３の外周面には、周方向に間隔をあけて段状突起１８を設けている。前記拡開爪挿入筒１３は段状突起１８を設けた部位に形成している。 The grommet 1 is a one-motion grommet in which the vehicle body locking recess 4 can be fitted into the through hole when the grommet 1 is inserted into the through hole of the vehicle body panel (not shown) from the small diameter cylindrical portion 2. Stepped protrusions 18 are provided on the outer peripheral surface at intervals in the circumferential direction. The expansion claw insertion cylinder 13 is formed at a site where the stepped protrusion 18 is provided.

つぎに、前記グロメット１へのワイヤハーネス１０の貫通作業について説明する。
図４（Ａ）に示すように、作業台３０上に固定された拡げ治具２０に対向してグロメット１を配置し、グロメット１の拡径筒部３の大径側を拡開爪２１の突出側に向け、該大径側に設けた４個の治具挿入穴９に４本の拡開爪２１をそれぞれ通して拡径筒部３内に挿入し、拡開爪用内側挿入筒１５の先端開口１５ａを通して挿入していく。
其の際、拡開爪用内側挿入筒１５を９０度間隔で設けていると共に、４本の拡開爪２１も９０度間隔で設けているため、該拡開爪２１を４個の治具挿入穴９に容易に位置を合わせてセットすることができる。さらに、治具挿入穴９と拡開爪内側挿入筒１５の先端開口１５ａの位置も対応させているため、治具挿入穴９に挿入した拡開爪２１を自動的に拡開爪内側挿入筒１５に挿入していくことができる。 Next, a penetration operation of the wire harness 10 to the grommet 1 will be described.
As shown in FIG. 4A, the grommet 1 is disposed so as to face the expansion jig 20 fixed on the work table 30, and the large diameter side of the expanded diameter cylindrical portion 3 of the grommet 1 is connected to the expansion claw 21. Toward the protruding side, the four expanding claws 21 are respectively inserted into the four jig insertion holes 9 provided on the large diameter side and inserted into the expanded diameter cylindrical portion 3, and the expanded insertion claw inner insertion cylinder 15 is inserted. Are inserted through the tip opening 15a.
At that time, the expansion claw inner insertion cylinders 15 are provided at intervals of 90 degrees, and the four expansion claws 21 are also provided at intervals of 90 degrees, so that the expansion claws 21 are provided with four jigs. The insertion hole 9 can be easily aligned and set. Furthermore, since the jig insertion hole 9 and the position of the tip opening 15a of the expansion claw inner insertion cylinder 15 are also made to correspond, the expansion claw 21 inserted into the jig insertion hole 9 is automatically expanded. 15 can be inserted.

グロメット１側を拡げ治具２０側に向けて移動することにより、４本の拡開爪２１はそれぞれ拡開爪内側挿入筒１５から拡開爪挿入筒１３内へと挿入されていく。拡開爪２１の先端が閉鎖部１３ｂに達する直前でグロメット１の拡げ治具２０側への移動を停止する。 By moving the grommet 1 side toward the expansion jig 20 side, the four expansion claws 21 are inserted from the expansion claw inner insertion cylinder 15 into the expansion claw insertion cylinder 13 respectively. The movement of the grommet 1 toward the spreading jig 20 is stopped immediately before the tip of the spreading claw 21 reaches the closing portion 13b.

ついで、拡げ治具２０の４本の拡開爪２１が互いに離反する方向に拡げていく。これに伴い、拡開爪内側挿入筒１５、拡開爪挿入筒１３が外周側へと押し拡げられる。拡開爪内側挿入筒１５の外周側への移動に追従して内部小径筒部５が拡がり、拡径筒部３の貫通穴１２の移動で拡径筒部３が拡がり、拡開爪挿入筒１３の移動で小径筒部２が拡げられる。かつ、小径筒部２側では、拡開爪挿入筒１３の間の周方向リブ１４が拡開爪挿入筒１３の移動に追従して拡がっていくため、小径筒部２は周方向全体が均等に拡がっていき、図４（Ｂ）の状態となる。 Next, the four expanding claws 21 of the expanding jig 20 are expanded in directions away from each other. Along with this, the expansion claw inner insertion tube 15 and the expansion claw insertion tube 13 are pushed and expanded toward the outer peripheral side. Following the movement of the expansion claw inner insertion cylinder 15 toward the outer peripheral side, the inner small diameter cylinder part 5 expands, and the movement of the through hole 12 of the diameter expansion cylinder part 3 expands the diameter expansion cylinder part 3, and the expansion claw insertion cylinder The small diameter cylindrical portion 2 is expanded by the movement of 13. And since the circumferential rib 14 between the expansion claw insertion cylinders 13 expands following the movement of the expansion claw insertion cylinder 13 on the small diameter cylinder section 2 side, the small diameter cylinder section 2 is uniform in the entire circumferential direction. To the state of FIG. 4 (B).

このように、小径筒部２、内部小径筒部５が拡げられた状態で、図４（Ｃ）に示すように、ワイヤハーネス１０を小径筒部２、内部小径筒部５および拡径筒部３の内部に貫通させる。 As shown in FIG. 4C, the small-diameter cylindrical portion 2, the internal small-diameter cylindrical portion 5, and the small-diameter cylindrical portion 2, the internal small-diameter cylindrical portion 5, and the large-diameter cylindrical portion are arranged. 3 is penetrated.

貫通作業終了後に、拡げ治具２０の拡開爪２１が互いに近接するように狭め、図４（Ａ）と同様な状態とする。この状態で、ワイヤハーネス１０を通したグロメット１を、ワイヤハーネス１０と共に拡げ治具２０より離れる方向にひっぱり、拡開爪２１をグロメット１より引き抜く。 After the penetration operation is completed, the expansion claws 21 of the expansion jig 20 are narrowed so as to be close to each other, and the state is the same as in FIG. In this state, the grommet 1 passed through the wire harness 10 is pulled in a direction away from the expansion jig 20 together with the wire harness 10, and the expansion claw 21 is pulled out from the grommet 1.

前記拡開爪２１をグロメット１より引き抜く時、拡開爪２１は拡開爪内側挿入筒１５、貫通穴１２、拡開爪挿入筒１３を通しているため、ワイヤハーネス１０の電線群と小径筒部２および内部小径筒部５内の電線群と接触しない。接触する可能性があるのは拡開爪用内側挿入筒１５の先端開口から閉鎖壁７の治具挿入穴９に達するまでであるが、この間は内部小径筒部５から引き出された直後の電線群は小径に保持されているため、拡開爪２１と接触しても強く密着することはない。
このように、拡開爪２１はワイヤハーネス１０の電線群およびグロメット１に対して圧接しながら引き抜かれることはないため、電線群およびグロメット１に損傷を与えることはない。 When the expansion claw 21 is pulled out from the grommet 1, the expansion claw 21 passes through the expansion claw inner insertion tube 15, the through hole 12, and the expansion claw insertion tube 13. And it does not contact the electric wire group in the internal small diameter cylindrical portion 5. There is a possibility of contact until it reaches the jig insertion hole 9 of the closing wall 7 from the opening at the front end of the inner claw 15 for expanding claw, but during this time, the electric wire immediately after being pulled out from the inner small diameter cylindrical portion 5 Since the group is held in a small diameter, even if it comes into contact with the expanding claw 21, it does not adhere strongly.
In this manner, the expanding claws 21 are not pulled out while being pressed against the electric wire group and the grommet 1 of the wire harness 10, and therefore do not damage the electric wire group and the grommet 1.

前記のように、ワイヤハーネス１０をグロメット１に貫通した後、図５に示すように、ワイヤハーネス１０は小径筒部２の先端側と粘着テープＴでテープ巻き固着し、他端では、閉鎖壁部７の開口８に沿って突出したテープ巻き舌片８ａに粘着テープＴを巻き付けてテープ巻き固着している。 As described above, after passing through the grommet 1 through the wire harness 10, as shown in FIG. 5, the wire harness 10 is taped and fixed to the distal end side of the small-diameter cylindrical portion 2 with the adhesive tape T, and at the other end, the closed wall An adhesive tape T is wound around a tape winding tongue piece 8a protruding along the opening 8 of the portion 7 and fixed with tape.

前記グロメット１に、オープナーケーブル３３および給水ホース３４を貫通させる場合には、前記図５に示すように、拡開爪２１の通し部分となる拡開爪挿入筒１３、貫通穴１２、拡開爪内側挿入筒１５をオープナーケーブル３３および給水ホース３４の挿通路として用いている。其の際、拡開爪挿入筒１３の先端閉鎖部１３ｂは切断している。
これらオープナーケーブル３３および給水ホース３４が挿通しない拡開爪挿入筒１３は先端閉鎖部１３ｂを閉鎖状態のままとして、前記粘着テープＴの巻き付け時に先端閉鎖部１３ｂにも粘着テープを巻き付けている。 When the opener cable 33 and the water supply hose 34 are passed through the grommet 1, as shown in FIG. 5, the expansion claw insertion cylinder 13, the through-hole 12, and the expansion claw serving as a passage portion for the expansion claw 21. The inner insertion cylinder 15 is used as an insertion path for the opener cable 33 and the water supply hose 34. In that case, the front-end | tip closing part 13b of the expansion nail insertion cylinder 13 is cut | disconnected.
The expansion claw insertion cylinder 13 through which the opener cable 33 and the water supply hose 34 are not inserted leaves the tip closing portion 13b in a closed state, and the tip closing portion 13b is also wrapped with the adhesive tape when the adhesive tape T is wound.

前記のように、本実施形態のグロメット１では、拡げ治具２０の拡開爪２１の抜き取り時にワイヤハーネスの電線群と小径筒部の間に拡開爪２１が挿入されていないため、無理なく抜き取りが行え、電線群およびグロメットに損傷を発生させず、かつ、抜き取り力を低減できるため作業者の負担を軽くできる。 As described above, in the grommet 1 of the present embodiment, since the expanding claw 21 is not inserted between the wire group of the wire harness and the small-diameter cylindrical portion when the expanding claw 21 of the expanding jig 20 is extracted, it is easy. Extraction can be performed, the wire group and the grommet are not damaged, and the extraction force can be reduced, thereby reducing the burden on the operator.

図６(Ａ)(Ｂ)に第二実施形態のグロメットを示す。
該グロメット１−Ａは、大径側の閉鎖壁７に、第一実施形態で設けていた治具挿入穴は設けていない点が相違する。 6 (A) and 6 (B) show a grommet according to the second embodiment.
The grommet 1-A is different in that the jig insertion hole provided in the first embodiment is not provided in the closing wall 7 on the large diameter side.

グロメット１−Ａに拡げ治具２０の拡開爪２１の通し作業をする際は、閉鎖壁７の中央に直径方向に設けたスリット７ａを大きく拡げて、拡開爪２１を拡径筒部３内に挿入し、前記拡開爪内側挿入筒１５から拡開爪挿入筒１３へと挿入している。
前記構成とすると、グロメット１−Ａの大径側の閉鎖壁７に治具挿入穴を設けていないため、該治具挿入穴からの塵芥の発生を防止できる。かつ、閉鎖壁７側が浸水領域に配置された場合でも、治具挿入穴からの浸水の発生を防止できる。
他の構成および作用効果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。 When the expansion claw 21 of the expansion jig 20 is threaded through the grommet 1-A, the slit 7a provided in the diameter direction in the center of the closing wall 7 is greatly expanded, and the expansion claw 21 is expanded to the diameter-expanded cylindrical portion 3. And inserted into the expanding claw insertion tube 13 from the expanding claw inner insertion tube 15.
If it is set as the said structure, since the jig | tool insertion hole is not provided in the closing wall 7 of the large diameter side of the grommet 1-A, generation | occurrence | production of the dust from this jig | tool insertion hole can be prevented. And even when the closed wall 7 side is arrange | positioned in a flooded area | region, generation | occurrence | production of the flood from a jig | tool insertion hole can be prevented.
Since other configurations and operational effects are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

本発明は前記実施形態に限定されず、小径筒部が小さいグロメットでは、治具穴を３箇所として、拡げ治具の３本の拡開爪で拡げてもよい。また、拡径筒部内に突出させる内部小径筒部がないグロメットにも適用できることは言うまでもない。また、グロメットはワンモーショングロメットに限定されず、グロメットを車体パネルの貫通穴に挿入した後に引き戻して貫通穴に装着するツーモーションのグロメットにも適用することができる。 The present invention is not limited to the above-described embodiment, and in a grommet having a small small-diameter cylindrical portion, three jig holes may be provided and the three expansion claws of the expansion jig may be used. Needless to say, the present invention can also be applied to a grommet having no internal small-diameter cylindrical portion protruding into the enlarged-diameter cylindrical portion. Further, the grommet is not limited to a one-motion grommet, and can be applied to a two-motion grommet that is pulled back after being inserted into the through hole of the vehicle body panel and attached to the through hole.

本発明の第一実施形態のグロメットを示し、（Ａ）は正面図、（Ｂ）は左側面図、（Ｃ）は右側面図である。The grommet of 1st embodiment of this invention is shown, (A) is a front view, (B) is a left view, (C) is a right view. 前記グロメットの拡大断面図である。It is an expanded sectional view of the grommet. 拡げ治具を示し、（Ａ）は拡開爪を閉じた状態の斜視図、（Ｂ）は拡開爪を拡げた状態の斜視図である。An expansion jig is shown, (A) is a perspective view of the state where the expansion claw was closed, and (B) is a perspective view of the state where the expansion claw was expanded. （Ａ）はグロメットに拡げ治具の拡開爪を挿入していく状態の断面図、（Ｂ）は拡開爪でグロメットを拡げた状態の斜視図、（Ｃ）は拡げた状態でワイヤハーネスを通す状態を示す断面図である。(A) is sectional drawing of the state which inserts the expansion claw of an expansion jig into a grommet, (B) is a perspective view of the state which expanded the grommet with the expansion claw, (C) is a wire harness in the expanded state It is sectional drawing which shows the state which lets it pass. グロメットにワイヤハーネスを貫通してテープで固着し、かつ、オープナーケーブルと給水ホースをグロメットに通した状態を示す概略正面図である。It is a schematic front view which shows the state which penetrated the wire harness to the grommet, was fixed with the tape, and the opener cable and the water supply hose were passed through the grommet. 第二実施形態を示し、（Ａ）はグロメットの大径側の閉鎖壁を示す左側面図、（Ｂ）は拡げ治具挿通時の断面図である。A 2nd embodiment is shown, (A) is a left view which shows a closed wall by the side of the large diameter of a grommet, and (B) is a sectional view at the time of an expansion jig insertion. 従来例を示す図面である。It is drawing which shows a prior art example.

符号の説明Explanation of symbols

１グロメット
２小径筒部
３拡径筒部
５内部小径筒部
６支持壁
７閉鎖壁
７ａスリット
８ａテープ巻き舌片
９（９Ａ〜９Ｄ）治具挿入穴
１０ワイヤハーネス
１３（１３Ａ〜１３Ｄ）拡開爪挿入筒
１４周方向リブ
１５（１５Ａ〜１５Ｄ）拡開爪内側挿入筒
２０拡げ治具
２１（２１Ａ〜２１Ｄ）拡開爪
３３オープナーケーブル
３４給水ホース DESCRIPTION OF SYMBOLS 1 Grommet 2 Small diameter cylinder part 3 Wide diameter cylinder part 5 Internal small diameter cylinder part 6 Support wall 7 Closure wall 7a Slit 8a Tape winding tongue piece 9 (9A-9D) Jig insertion hole 10 Wire harness 13 (13A-13D) Expansion Claw insertion cylinder 14 Circumferential rib 15 (15A to 15D) Expansion claw inner insertion cylinder 20 Expansion jig 21 (21A to 21D) Expansion claw 33 Opener cable 34 Water supply hose

Claims

小径筒部の一端に拡径筒部が連続し、該拡径筒部の大径側外周面に環状の車体係止凹部を備えた弾性材からなり、車両用のワイヤハーネスに外装するグロメットであって、
前記小径筒部を囲む前記拡径筒部の小径側に周方向に間隔をあけて３個または４個の拡開爪挿入筒を設け、これらの拡開爪挿入筒の前記小径筒部に沿った部分を小径筒部の外周面に周方向に間隔をあけて一体化させて拡径筒部より突出させると共に、突出端は閉鎖部とし、
ワイヤハーネスの貫通作業時に、前記拡径筒部の大径側開口より拡げ治具の３本または４本の拡開爪を１本ずつ前記拡開爪挿入筒に通し、これら拡開爪を互いに離反方向に拡げて前記小径筒部を拡げる構成としていることを特徴とするグロメット。 A grommet that is made of an elastic material that has an enlarged cylindrical portion that is continuous with one end of a small-diameter cylindrical portion, and that has an annular vehicle body locking recess on the outer diameter side of the large-diameter cylindrical portion. There,
Three or four widening claw insertion cylinders are provided on the small diameter side of the large diameter cylindrical part surrounding the small diameter cylindrical part at intervals in the circumferential direction, and along the small diameter cylindrical part of these widening claw insertion cylinders The outer peripheral surface of the small-diameter cylindrical part is integrated with an interval in the circumferential direction and protruded from the enlarged-diameter cylindrical part, and the protruding end is a closed part,
When penetrating the wire harness, three or four expansion claws of the expansion jig are passed through the expansion claw insertion cylinder one by one from the large diameter side opening of the expansion cylinder portion, and the expansion claws are mutually connected. A grommet that is configured to expand in the separating direction to expand the small-diameter cylindrical portion.

前記小径筒部の外周面に周方向に間隔をあけて設ける拡開爪挿入筒を繋ぐ周方向リブを小径筒部の外周面から突設している請求項１に記載のグロメット。 The grommet according to claim 1, wherein circumferential ribs connecting expansion claw insertion cylinders provided at intervals in the circumferential direction on the outer peripheral surface of the small diameter cylindrical portion are provided so as to protrude from the outer peripheral surface of the small diameter cylindrical portion.

前記拡開爪挿入筒の先端の閉鎖部は切除して、オープナーケーブルおよび給水ホースの挿通穴にできるようにしている請求項１または請求項２に記載のグロメット。 The grommet according to claim 1 or 2, wherein a closing portion at a tip of the expansion claw insertion tube is cut so as to be an insertion hole of an opener cable and a water supply hose.

前記拡径筒部の内部に突出させた内部小径筒部を前記小径筒部に連続させて設け、前記拡開爪挿入筒に連続する先端開口の拡開爪用内側挿入筒を前記内部小径筒部の外面と連結させて設けている請求項１乃至請求項３のいずれか１項に記載のグロメット。 An internal small-diameter cylindrical portion protruding inside the large-diameter cylindrical portion is provided continuously to the small-diameter cylindrical portion, and an inner insertion tube for an expansion claw having a distal end opening continuous with the expansion claw insertion tube is provided as the internal small-diameter tube. The grommet according to any one of claims 1 to 3, wherein the grommet is connected to an outer surface of the portion.