JPS6115349Y2

JPS6115349Y2 -

Info

Publication number: JPS6115349Y2
Application number: JP16180379U
Authority: JP
Priority date: 1979-11-24
Filing date: 1979-11-24
Publication date: 1986-05-13
Also published as: JPS5679785U

Description

【考案の詳細な説明】〔産業上の利用分野〕この考案は遮音効果の優れたグロメツトに関す
るものである。[Detailed description of the invention] [Industrial application field] This invention relates to a grommet with excellent sound insulation effect.

[Conventional technology]

従来のグロメツトは、第１図（実開昭52−
12699に開示されている）に示すように、エンジ
ンルーム側から車室側へ配索されたハーネス
１と、エンジンルームと車室を仕切るダツシ
ユインシユレーター２の挿通孔３との間に介装さ
れて使用されるもので、これによつて、通気の遮
断、遮音等を図つている。このグロメツト４は前
記挿通孔３に嵌着される大口径環部５と、挿通さ
れたハーネス１を挟持する小口径の筒部６と、両
者５，６を一体に連結した比較的肉薄なブーツ部
７とより構成されているので、前記挿通孔３を通
してのエンジンルームと車室との通近は遮断
できる。 The conventional grommet is shown in Fig. 1 (1987-
12699), there is an intervening hole between the harness 1 routed from the engine room side to the passenger compartment side and the insertion hole 3 of the dart insulator 2 that partitions the engine room and the passenger compartment. This is used to block ventilation, sound insulation, etc. This grommet 4 has a large-diameter ring portion 5 fitted into the insertion hole 3, a small-diameter cylindrical portion 6 that holds the inserted harness 1, and a relatively thin boot that integrally connects both 5 and 6. 7, communication between the engine room and the passenger compartment through the insertion hole 3 can be blocked.

[The problem that the invention attempts to solve]

しかしながら、ブーツ部７が比較的肉薄である
ため、エンジンルームの音は完全に遮断される
ことなく、このブーツ部７を通つてなお車室内
へ侵入し、充分な遮音効果を奏し得ない、という
問題があつた。 However, since the boot portion 7 is relatively thin, the sound in the engine room is not completely blocked and still enters the passenger compartment through the boot portion 7, making it impossible to achieve a sufficient sound insulation effect. There was a problem.

この考案は、このような従来の問題点を解決す
るためになされたもので、ハーネスと前記グロメ
ツトの環部との間に密着嵌合させる環状の弾性部
材を設けることにより遮音効果の格段と向上した
グロメツトを得ることを目的とする。 This invention was made to solve these conventional problems, and by providing an annular elastic member that tightly fits between the harness and the ring of the grommet, the sound insulation effect is significantly improved. The purpose is to obtain a grommet with a

[Means for solving problems]

この考案に係るグロメツトは、挿通されたハー
ネスを挟持する小口径の筒部とダツシユインシユ
レーターの挿通孔に嵌着する大口径環部と前記孔
部と環部とを連結するブーツ部とより形成された
グロメツト本体と、前記ハーネスと環部との間に
密着嵌合する環状の弾性部材とよりなるものであ
る。 The grommet according to this invention includes a small-diameter cylindrical part that holds the inserted harness, a large-diameter ring part that fits into the insertion hole of the dart insulator, and a boot part that connects the hole and the ring part. The grommet main body is formed of a rubber grommet, and an annular elastic member is tightly fitted between the harness and the ring portion.

[Effect]

環部とハーネスとの間に、環状の弾性部材によ
つて厚い隔壁が形成されるので、ダツシユインシ
ユレーターの挿入孔には、この隔壁とブーツ部に
よつて二重の遮音壁ができる。 Since a thick partition wall is formed between the ring part and the harness by the annular elastic member, a double sound insulating wall is formed in the insertion hole of the dart insulator by this partition wall and the boot part.

したがつて、ブーツ部を通過したエンジンルー
ムの騒音は、隔壁によつて、ほぼ完全に遮断され
る。 Therefore, noise from the engine room that passes through the boot portion is almost completely blocked by the partition wall.

〔Example〕

以下に、この考案の一実施例を第２図によつて
説明する。 An embodiment of this invention will be described below with reference to FIG.

図において、グロメツト本体ａは、前記従来例
のグロメツト４と同一の構成であるので、各部の
構成の説明の詳細はこれを省く。 In the figure, the grommet main body a has the same structure as the grommet 4 of the conventional example, so detailed description of the structure of each part will be omitted.

８はハーネス１が挿通される環状の弾性部材
で、ゴム等の伸縮材料で形成され、断面円状の所
謂ドーナツ形状を有する。この弾性部材８の内径
ｌは、ハーネス１の径よりやや小さく形成し、そ
の外径Ｌはグロメツト本体ａの環部５の内周面５
の径よりやや大きく形成し、ハーネス１と環部５
の間に介装したとき、環部５の内周面５′とハー
ネス１の表面に弾性的に密着するようにしてあ
る。この状態においては、ブーツ部７との間に気
密室ｂが形成される。なお、９はハーネス１のコ
ネクターである。 Reference numeral 8 denotes an annular elastic member through which the harness 1 is inserted, which is made of an elastic material such as rubber, and has a so-called donut shape with a circular cross section. The inner diameter l of this elastic member 8 is formed to be slightly smaller than the diameter of the harness 1, and the outer diameter L is the inner circumferential surface 5 of the ring portion 5 of the grommet body a.
The harness 1 and the ring part 5 are formed slightly larger than the diameter of the ring part 5.
When inserted between them, the inner circumferential surface 5' of the ring portion 5 and the surface of the harness 1 are elastically brought into close contact. In this state, an airtight chamber b is formed between the boot portion 7 and the boot portion 7. Note that 9 is a connector of the harness 1.

このような構成になつているので、グロメツト
４とハーネス１の取付けは次の手順による。ま
ず、グロメツト本体ａを従来例と同様にダツシユ
インシユレーター２の挿通孔３に固着し、ハーネ
ス１を挿通して取付ける。環状の弾性部材８は、
車室側に位置するハーネス１の端部の多数のコ
ネクター９を挿通できるように一点鎖線に示す状
態に充分に伸長させ、二点鎖線のようにハーネス
１に嵌める。ついで弾性部材８を矢符方向へ移動
させて、実線で示すように、環部５に嵌合する。
このとき、弾性部材８はハーネス１上を回転させ
ながら移動させることもできる。 With this configuration, the grommet 4 and harness 1 can be attached in the following manner. First, the grommet body a is fixed to the insertion hole 3 of the dash insulator 2 in the same manner as in the conventional example, and the harness 1 is inserted and attached. The annular elastic member 8 is
The harness 1 is fully extended to the state shown by the one-dot chain line so that a large number of connectors 9 at the end of the harness 1 located on the vehicle interior side can be inserted, and the harness 1 is fitted into the harness 1 as shown by the two-dot chain line. Next, the elastic member 8 is moved in the direction of the arrow and is fitted into the ring portion 5 as shown by the solid line.
At this time, the elastic member 8 can also be moved while rotating on the harness 1.

このようにして弾性部材８を、グロメツト本体
ａの環部５とハーネス１との間に介装すると、そ
こに弾性部材８の隔壁が形成される。したがつ
て、ブーツ部７を通過したエンジンルームの騒
音は弾性部材８の隔壁によつてほぼ完全に遮断さ
れ、エンジンルーム騒音がグロメツト取付部から
車室へ侵入するといつたおそれは殆んどなくな
る。 When the elastic member 8 is interposed between the ring portion 5 of the grommet body a and the harness 1 in this manner, a partition wall of the elastic member 8 is formed there. Therefore, the noise in the engine room that has passed through the boot part 7 is almost completely blocked by the partition wall of the elastic member 8, and there is almost no possibility that the noise in the engine room will enter the passenger compartment from the grommet mounting part. .

[Effect of idea]

以上説明したように、この考案によれば、グロ
メツトの環部とグロメツトに挿通したハーネスと
の間に環状の弾性部材を介装する構成としたか
ら、遮音効果を格段に向上させることがしでき
る。 As explained above, according to this invention, since the annular elastic member is interposed between the ring part of the grommet and the harness inserted through the grommet, the sound insulation effect can be significantly improved. .

[Brief explanation of the drawing]

第１図は従来のグロメツトを示す断面図、第２
図はこの考案の実施例を示す断面図、第３図は第
２図における環状の弾性部材の正面図である。１……ハーネス、ａ……環部５，ブーツ部７，
筒部６より成るグロメツト本体、４……従来のグ
ロメツト、５′……環部５の内周面、８……環状
の弾性部材。 Figure 1 is a sectional view showing a conventional grommet, Figure 2 is a sectional view showing a conventional grommet.
The figure is a sectional view showing an embodiment of this invention, and FIG. 3 is a front view of the annular elastic member in FIG. 2. 1... Harness, a... Ring part 5, Boot part 7,
A grommet main body consisting of a cylindrical portion 6, 4... a conventional grommet, 5'... the inner circumferential surface of the ring portion 5, 8... an annular elastic member.

Claims

[Scope of utility model registration request]

A grommet main body formed of a small-diameter cylindrical part that holds the inserted harness, a large-diameter ring part that fits into the insertion hole of the dart insulator, and a boot part that connects the cylindrical part and the ring part. and an annular elastic member tightly fitted between the harness and the ring portion.