JP2023084065A - Grommet and wire harness - Google Patents

Grommet and wire harness Download PDF

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JP2023084065A
JP2023084065A JP2022039020A JP2022039020A JP2023084065A JP 2023084065 A JP2023084065 A JP 2023084065A JP 2022039020 A JP2022039020 A JP 2022039020A JP 2022039020 A JP2022039020 A JP 2022039020A JP 2023084065 A JP2023084065 A JP 2023084065A
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grommet
hole
sound insulation
diameter
cylindrical portion
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JP7477551B2 (en
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純希 杉野
Junki Sugino
貞男 森
Sadao Mori
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Yazaki Corp
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Yazaki Corp
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Priority to CN202211552084.0A priority Critical patent/CN116231547A/en
Priority to US18/074,918 priority patent/US20230178271A1/en
Priority to FR2212801A priority patent/FR3130087A1/en
Publication of JP2023084065A publication Critical patent/JP2023084065A/en
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Abstract

To provide a grommet, etc. that can be prevented from interfering with an attachment destination member during a work for attaching the grommet to a circumferential edge portion of a through hole, and has an advantage to improve the workability of being attached to the circumferential edge portion of the through hole.SOLUTION: A grommet body 11 of a grommet 10 includes: a large-diameter tube portion 12; a first small-diameter tube portion 13 to be disposed on one side of a through hole 2; and a second small-diameter tube portion 14 to be disposed on the other side of the through hole 2. The grommet body 11 includes a sound insulating portion 15 that extends from an inner circumferential side to an outer circumferential side of the grommet body 11 and has an umbrella-like shape to cover the through hole 2 from the other side. The sound insulating portion 15 can be folded back from a fold-back portion 22 such that a contact side surface 15b is directed toward the outside in a radial direction of the grommet body 11. In a state where the contact side surface 15b is folded back to be directed toward the outside in the radial direction of the grommet body 11, the sound insulating portion 15 provides a pleated shape in which a pleat 23 is disposed in a circumferential direction. In this state, an outer diameter D1 of the sound insulating portion 15 is smaller than an inner diameter D2 of the through hole 2.SELECTED DRAWING: Figure 5

Description

本発明は、グロメット及びワイヤーハーネスに関する。 The present invention relates to grommets and wire harnesses.

従来、板材に予め形成されている貫通孔に電線を貫通させるに際して、貫通孔の周縁部から電線を保護するために貫通孔の周縁部に取り付けられるグロメット（grommet）がある。特許文献１は、被取付部材としての車体パネルにある貫通孔に電線を貫通させるに際して、電線を保持するグロメット本体を備えるグロメットに関する技術を開示している。グロメット本体には、筒状のワイヤーハーネス支持部の外周部から、車体パネルへの取付部であるパネル取付部に向けて延出する傘状部（傘状の遮音部）が設けられている。この傘状部の具備により、グロメットが車体パネルの貫通孔との取付部分周りでの音漏れを抑制することができるよう構成されている。 2. Description of the Related Art Conventionally, there is a grommet that is attached to the periphery of a through-hole in order to protect the wire from the periphery of the through-hole when the wire is passed through the through-hole pre-formed in a plate. Patent Literature 1 discloses a technique related to a grommet having a grommet body that holds an electric wire when passing the electric wire through a through hole in a vehicle body panel as a member to be attached. The grommet body is provided with an umbrella-shaped portion (umbrella-shaped sound insulation portion) extending from the outer peripheral portion of the tubular wire harness support portion toward the panel attachment portion, which is the attachment portion to the vehicle body panel. By providing the umbrella-shaped portion, the grommet is configured to suppress sound leakage around the portion where the grommet is attached to the through hole of the vehicle body panel.

特開２０１２－２３９３２１号公報JP 2012-239321 A

特許文献１に開示されているグロメットでは、音漏れを抑制する傘状部の外径が、電線を貫通させる貫通孔の内径よりも大きく、貫通孔の周縁部に取り付けられる際の作業時に傘状部が被取付部材と干渉し、貫通孔の周縁部に取り付けられる際の作業性が悪かった。 In the grommet disclosed in Patent Document 1, the outer diameter of the umbrella-shaped portion that suppresses sound leakage is larger than the inner diameter of the through-hole through which the electric wire passes, and the umbrella-shaped portion is attached to the periphery of the through-hole. The part interfered with the member to be attached, and workability was poor when attaching to the peripheral edge of the through hole.

本発明は、このような従来技術が有する課題に鑑みてなされたものである。そして本発明の目的は、貫通孔の周縁部に取り付けられる際の作業時に被取付部材と干渉することを抑制でき、貫通孔の周縁部に取り付けられる際の作業性を向上させるのに有利なグロメット及び当該グロメットを用いたワイヤーハーネスを提供することにある。 The present invention has been made in view of the problems of the prior art. It is an object of the present invention to provide a grommet that is capable of suppressing interference with a member to be attached during work when it is attached to the peripheral edge of a through hole, and that is advantageous in improving workability when attached to the peripheral edge of the through hole. And it is to provide a wire harness using the grommet.

本発明の態様に係るグロメットは、被取付部材にある貫通孔を貫通する電線を内周側で保持するグロメット本体を備え、グロメット本体は、貫通孔の周縁部に係止される大径筒部と、貫通孔の開口部分の一方側に配置される第１小径筒部と、貫通孔の開口部分の他方側に配置される第２小径筒部と、グロメット本体の内周側から外周側へと延在し、貫通孔の開口部分を他方側から覆う傘状の遮音部と、を有し、遮音部は、折返部分を基点として遮音部の内側面がグロメット本体の径方向外側を向くように折り返すことができるよう構成され、遮音部の内側面がグロメット本体の径方向外側を向くように折り返された状態の遮音部は、周方向にヒダが複数設けられたヒダ形状を呈し、その状態における遮音部の外径が貫通孔の内径よりも小さい。 A grommet according to an aspect of the present invention includes a grommet body that holds, on the inner peripheral side, an electric wire that passes through a through hole in a mounted member, and the grommet body is a large-diameter cylindrical portion that is locked to the peripheral edge of the through hole. a first small-diameter cylindrical portion arranged on one side of the opening of the through-hole; a second small-diameter cylindrical portion arranged on the other side of the opening of the through-hole; and an umbrella-shaped sound insulation part that covers the opening part of the through hole from the other side, and the sound insulation part is arranged such that the inner surface of the sound insulation part faces radially outward of the grommet body with the folded part as a base point. The sound insulation part is folded back so that the inner surface of the sound insulation part faces the outside in the radial direction of the grommet body. The outer diameter of the sound insulation part in is smaller than the inner diameter of the through hole.

本発明の態様に係るワイヤーハーネスは、上述のグロメットを備える。 A wire harness according to an aspect of the present invention includes the grommet described above.

本発明によれば、貫通孔の周縁部に取り付けられる際の作業時に被取付部材と干渉することを抑制でき、貫通孔の周縁部に取り付けられる際の作業性を向上させるのに有利なグロメット及び当該グロメットを用いたワイヤーハーネスを提供することができる。 ADVANTAGE OF THE INVENTION According to the present invention, a grommet that can suppress interference with a member to be attached during work when it is attached to the peripheral edge of a through hole, and is advantageous in improving workability when attached to the peripheral edge of the through hole; A wire harness using the grommet can be provided.

第１の実施形態に係るグロメットの一例を示す斜視図である。It is a perspective view showing an example of a grommet according to the first embodiment. 第１の実施形態に係るグロメットの断面図である。It is a sectional view of a grommet concerning a 1st embodiment. 第１の実施形態に係るグロメットの分解図である。1 is an exploded view of a grommet according to the first embodiment; FIG. 第１の実施形態における傘状の遮音部を折り返した状態を示す斜視図である。FIG. 4 is a perspective view showing a state in which the umbrella-shaped sound insulation part in the first embodiment is folded back; 第１の実施形態における傘状の遮音部を折り返した状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state in which the umbrella-shaped sound insulation part in the first embodiment is folded back; 第２の実施形態に係るグロメットの一例を示す斜視図である。It is a perspective view showing an example of a grommet according to a second embodiment. 第２の実施形態に係るグロメットの断面図である。It is a sectional view of a grommet concerning a 2nd embodiment. 第２の実施形態に係るグロメットの分解図である。FIG. 5 is an exploded view of a grommet according to a second embodiment; 第２の実施形態における傘状の遮音部を折り返した状態を示す斜視図である。FIG. 11 is a perspective view showing a state in which an umbrella-shaped sound insulation part according to the second embodiment is folded back; 第２の実施形態における傘状の遮音部を折り返した状態を示す断面図である。FIG. 11 is a cross-sectional view showing a state in which the umbrella-shaped sound insulation part according to the second embodiment is folded back; 第３の実施形態に係るグロメットの一例を示す斜視図である。It is a perspective view showing an example of a grommet according to a third embodiment. 第３の実施形態に係るグロメットの断面図である。It is a sectional view of a grommet concerning a 3rd embodiment. 第３の実施形態における傘状の遮音部を折り返した状態を示す斜視図である。FIG. 11 is a perspective view showing a state in which an umbrella-shaped sound insulation part according to the third embodiment is folded back; 第３の実施形態における傘状の遮音部を折り返した状態を示す断面図である。It is sectional drawing which shows the state which folded up the umbrella-shaped sound insulation part in 3rd Embodiment.

以下、図面を用いて本実施形態に係るグロメットについて詳細に説明する。なお、図面の寸法比率は説明の都合上誇張されており、実際の比率と異なる場合がある。 The grommet according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from the actual ratios.

［第１の実施形態］
図１は、第１の実施形態に係るグロメット１０の斜視図であり、図２は、第１の実施形態に係るグロメット１０の断面図である。グロメット１０は、一例として、被取付部材としての車体パネル１に予め形成されている貫通孔２の周縁部に取り付けられ、貫通孔２を貫通させた電線Ｗを貫通孔２の周縁部から保護するものとする。貫通孔２の開口形状は、本実施形態では、円形である。電線Ｗは、電線集合体としてのワイヤーハーネスであってもよい。なお、以下の説明では、上方とは、グロメット１０が貫通孔２の周縁部に取り付けられるときに貫通孔２に向かう方向の側をいい、下方とは、その反対側をいう。 [First embodiment]
FIG. 1 is a perspective view of the grommet 10 according to the first embodiment, and FIG. 2 is a cross-sectional view of the grommet 10 according to the first embodiment. As an example, the grommet 10 is attached to the periphery of a through-hole 2 that is formed in advance in a vehicle body panel 1 as a member to be attached, and protects the electric wire W passing through the through-hole 2 from the periphery of the through-hole 2. shall be The opening shape of the through-hole 2 is circular in this embodiment. The electric wire W may be a wire harness as an electric wire assembly. In the following description, "upward" refers to the direction toward the through hole 2 when the grommet 10 is attached to the peripheral edge of the through hole 2, and "downward" refers to the opposite side.

また、車体パネル１は、一例として、車体パネル１の一方側（エンジンルーム側）に配置されるパネル１ａと、車体パネル１の他方側（車室内側）に配置されるインシュレータ（遮音材）１ｂとを含むものとする。 The vehicle body panel 1 includes, for example, a panel 1a arranged on one side (engine room side) of the vehicle body panel 1 and an insulator (sound insulation material) 1b arranged on the other side (vehicle interior side) of the vehicle body panel 1. and

図３は、グロメット１０の分解図である。グロメット１０は、グロメット本体１１と、インナープロテクタ３０とを備える。また、グロメット本体１１にはインナープロテクタ３０を接続せずに、グロメット本体１１が貫通孔２の周縁部に直接取り付けられていてもよい。 FIG. 3 is an exploded view of grommet 10. As shown in FIG. The grommet 10 includes a grommet body 11 and an inner protector 30. - 特許庁Further, the grommet body 11 may be directly attached to the peripheral portion of the through hole 2 without connecting the inner protector 30 to the grommet body 11 .

グロメット本体１１は、内周側に電線Ｗを配策させて保持する筒状部材である。グロメット本体１１は、ゴム材等の柔軟な材料で形成される。グロメット本体１１は、大径筒部１２と、第１小径筒部１３と、第２小径筒部１４と、遮音部１５とを含む。 The grommet main body 11 is a cylindrical member that holds the electric wire W routed on the inner peripheral side. The grommet body 11 is made of a flexible material such as rubber. The grommet body 11 includes a large-diameter tubular portion 12 , a first small-diameter tubular portion 13 , a second small-diameter tubular portion 14 , and a sound insulation portion 15 .

大径筒部１２は、インナープロテクタ３０が接続される。大径筒部１２の外径は、貫通孔２の開口径よりも大きい。大径筒部１２は、嵌合溝１６と、リップ部１７とを含む。 An inner protector 30 is connected to the large-diameter tubular portion 12 . The outer diameter of the large-diameter cylindrical portion 12 is larger than the opening diameter of the through hole 2 . The large-diameter tubular portion 12 includes a fitting groove 16 and a lip portion 17 .

嵌合溝１６は、大径筒部１２の外周側に環状に形成され、インナープロテクタ３０が大径筒部１２に接続されるとき、インナープロテクタ３０の鍔部３３を嵌合させる。また、嵌合溝１６の一部には、鍔部３３の一部に形成されている凸部３３ａに係合する凹部１８が設けられていてもよい。 The fitting groove 16 is annularly formed on the outer peripheral side of the large-diameter tubular portion 12 , and engages the collar portion 33 of the inner protector 30 when the inner protector 30 is connected to the large-diameter tubular portion 12 . Further, a recess 18 that engages with a protrusion 33 a formed on a part of the flange 33 may be provided in a part of the fitting groove 16 .

リップ部１７は、環状のシール部であり、車体パネル１に対向する外周縁面１２ａから車体パネル１側に突出する。リップ部１７は、内周リップ部１７ａと、外周リップ部１７ｂとで構成されてもよい。グロメット１０が貫通孔２の周縁部に取り付けられたとき、内周リップ部１７ａ及び外周リップ部１７ｂは、外周縁面１２ａの側に倒れる方向に弾性変形し、車体パネル１の一方の表面にある、貫通孔２の周縁面に密着する。これにより、リップ部１７と、リップ部１７に対向する車体パネル１の表面との間を通じた、グロメット１０の外部から内部への水等の浸入が抑止される。 The lip portion 17 is an annular seal portion and protrudes toward the vehicle body panel 1 from the outer peripheral edge surface 12 a facing the vehicle body panel 1 . The lip portion 17 may be composed of an inner peripheral lip portion 17a and an outer peripheral lip portion 17b. When the grommet 10 is attached to the peripheral edge portion of the through hole 2, the inner peripheral lip portion 17a and the outer peripheral lip portion 17b are elastically deformed in the direction of falling toward the outer peripheral edge surface 12a, and are located on one surface of the vehicle body panel 1. , adheres closely to the peripheral surface of the through hole 2 . This prevents water or the like from entering the grommet 10 from the outside through the lip portion 17 and the surface of the vehicle body panel 1 facing the lip portion 17 .

第１小径筒部１３は、大径筒部１２の車体パネル１に対向する側とは反対側と第１拡径筒部１９及び蛇腹筒部２０を介して連続し、内周側で電線Ｗを保持する。この第１小径筒部１３は、貫通孔２の開口部分の一方側（エンジンルーム側）に配置されており、所定の長さに亘って電線Ｗの外周面と接触する内面を有する。第１小径筒部１３の内径は、大径筒部１２の内径よりも小さく、且つ、電線Ｗの外径よりも若干小さいか、電線Ｗの外径とほぼ同一である。これにより、第１小径筒部１３の内面と電線Ｗの外周面との間を通じた、グロメット１０の外部から内部への水等の浸入が抑止される。第１小径筒部１３は、柔軟な材料で形成されているので、電線Ｗの姿勢変化に合わせて変形する。また、第１小径筒部１３の内周面には、第１小径筒部１３の内周面と電線Ｗとの間の隙間を塞ぐ環状の第１シール部１３ａが設けられていてもよい。 The first small-diameter tubular portion 13 is continuous with the side of the large-diameter tubular portion 12 opposite to the side facing the vehicle body panel 1 via the first enlarged-diameter tubular portion 19 and the bellows tubular portion 20, and the electric wire W is connected to the inner peripheral side. hold. The first small-diameter tubular portion 13 is arranged on one side (engine room side) of the opening of the through hole 2 and has an inner surface that contacts the outer peripheral surface of the electric wire W over a predetermined length. The inner diameter of the first small-diameter cylindrical portion 13 is smaller than the inner diameter of the large-diameter cylindrical portion 12 and slightly smaller than the outer diameter of the wire W, or substantially the same as the outer diameter of the wire W. This prevents water or the like from entering from the outside of the grommet 10 to the inside through the space between the inner surface of the first small-diameter tubular portion 13 and the outer peripheral surface of the electric wire W. Since the first small-diameter cylindrical portion 13 is made of a flexible material, it deforms according to the change in the posture of the electric wire W. As shown in FIG. Further, an annular first seal portion 13 a that closes the gap between the inner peripheral surface of the first small-diameter tubular portion 13 and the wire W may be provided on the inner peripheral surface of the first small-diameter tubular portion 13 .

第２小径筒部１４は、大径筒部１２の車体パネル１に対向する側と第２拡径筒部２１を介して連続し、内周側で電線Ｗを保持する。この第２小径筒部１４は、貫通孔２の開口部分の他方側（車室内側）に配置されており、所定の長さに亘って電線Ｗの外周面と接触する内面を有する。第２小径筒部１４の内径は、大径筒部１２の内径よりも小さく、且つ、電線Ｗの外径よりも若干小さいか、電線Ｗの外径とほぼ同一である。これにより、第２小径筒部１４の内面と電線Ｗの外周面との間を通じた、グロメット１０の外部から内部への水等の浸入が抑止される。第２小径筒部１４は、柔軟な材料で形成されているので、電線Ｗの姿勢変化に合わせて変形する。また、第２小径筒部１４の内周面には、第２小径筒部１４の内周面と電線Ｗとの間の隙間を塞ぐ環状の第２シール部１４ａが設けられていてもよい。さらに、第２小径筒部１４の先端には、テープ巻き用の舌片部１４ｂが突設されていてもよい。 The second small-diameter tubular portion 14 is continuous with the side of the large-diameter tubular portion 12 facing the vehicle body panel 1 via the second enlarged-diameter tubular portion 21, and holds the electric wire W on the inner peripheral side. The second small-diameter tubular portion 14 is arranged on the other side of the opening of the through hole 2 (inside the vehicle compartment), and has an inner surface that contacts the outer peripheral surface of the wire W over a predetermined length. The inner diameter of the second small-diameter cylindrical portion 14 is smaller than the inner diameter of the large-diameter cylindrical portion 12 and slightly smaller than the outer diameter of the wire W, or substantially the same as the outer diameter of the wire W. As a result, entry of water or the like from the outside to the inside of the grommet 10 through the space between the inner surface of the second small-diameter cylindrical portion 14 and the outer peripheral surface of the wire W is suppressed. Since the second small-diameter tubular portion 14 is made of a flexible material, it deforms according to the change in the posture of the wire W. As shown in FIG. Further, an annular second seal portion 14 a that closes the gap between the inner peripheral surface of the second small-diameter tubular portion 14 and the wire W may be provided on the inner peripheral surface of the second small-diameter tubular portion 14 . Furthermore, a tape winding tongue portion 14b may protrude from the tip of the second small-diameter tubular portion 14 .

遮音部１５は、第２拡径筒部２１の外周側に傘状又は鍔状に形成され、グロメット本体１１の内周側から外周側へと延在している。つまり、遮音部１５は、第２拡径筒部２１の外面から延出する傘状又は鍔状に形成されている。グロメット１０が貫通孔２の周縁部に取り付けられ、且つ、遮音部１５が図１及び図２に示すように拡開されたとき、遮音部１５の先端部にある外周縁部１５ａが、車体パネル１の他方の表面にある、貫通孔２の周縁面に密着する。つまり、遮音部１５が図１及び図２に示すように拡開された状態における遮音部１５の外径は貫通孔２の開口径よりも大きい。これにより、遮音部１５と貫通孔２の周縁部との間に、閉じられた遮音空間を形成して、車体パネル１、遮音部１５と貫通孔２の周縁部との間の空間を通じて、エンジンルームから車室内に入ってくる音の伝達（音漏れ）を抑制することができる。また、遮音部１５は、第２小径筒部１４の外面から延出する傘状又は鍔状に形成されていてもよい。 The sound insulating portion 15 is formed in an umbrella shape or a flange shape on the outer peripheral side of the second enlarged diameter tubular portion 21 and extends from the inner peripheral side to the outer peripheral side of the grommet body 11 . That is, the sound insulation part 15 is formed in an umbrella shape or a flange shape extending from the outer surface of the second diameter-enlarged cylindrical part 21 . When the grommet 10 is attached to the periphery of the through hole 2 and the sound insulation portion 15 is expanded as shown in FIGS. It adheres to the peripheral surface of the through hole 2 on the other surface of 1 . That is, the outer diameter of the sound insulation part 15 in the state in which the sound insulation part 15 is expanded as shown in FIGS. 1 and 2 is larger than the opening diameter of the through hole 2 . As a result, a closed sound insulating space is formed between the sound insulating portion 15 and the peripheral portion of the through hole 2, and through the space between the vehicle body panel 1, the sound insulating portion 15 and the peripheral portion of the through hole 2, the engine It is possible to suppress the transmission (sound leakage) of sound entering the passenger compartment from the room. Moreover, the sound insulation part 15 may be formed in an umbrella shape or a flange shape extending from the outer surface of the second small-diameter cylindrical part 14 .

図４は、第１の実施形態における傘状の遮音部１５を拡開した状態から収縮した状態を示す斜視図であり、図５は、第１の実施形態における傘状の遮音部１５を拡開した状態から収縮した状態を示す断面図である。 FIG. 4 is a perspective view showing the state in which the umbrella-shaped sound insulation part 15 in the first embodiment is contracted from the expanded state, and FIG. FIG. 4 is a cross-sectional view showing a contracted state from an opened state;

傘状の遮音部１５は、本実施形態では、折返部分２２を基点として遮音部１５の当接側面１５ｂがグロメット本体１１の径方向外側を向くように折り返すことができるよう構成されている。当接側面１５ｂは、遮音部１５の表裏面のうち、貫通孔２の周縁部に当接する内側面である。遮音部１５の当接側面１５ｂがグロメット本体１１の径方向外側を向くように折り返された状態の遮音部１５は、周方向にヒダ２３が複数設けられたヒダ形状を呈し、その状態における遮音部１５の外径Ｄ１が貫通孔２の内径Ｄ２よりも小さい（Ｄ１＜Ｄ２）。遮音部１５の当接側面１５ｂを折り曲げる位置を外周縁部１５ａに対して高い位置にするために、折返部分２２は、遮音部１５の外周縁部１５ａよりも車体パネル１からグロメット本体１１の長さ方向において離れた位置に設けられている。また、折返部分２２は、遮音部１５の当接側面１５ｂに周方向に沿って形成された折返溝２４を含む。つまり、遮音部１５の当接側面１５ｂには、遮音部１５の当接側面１５ｂの一部を薄肉にして貫通孔２の周縁面のある方向に折り曲げ易くするために折返溝２４が設けられている。その一方、遮音部１５における第２拡径筒部２１との接続部である内周縁部１５ｃは、外周縁部１５ａに対して低い位置に設けられている。グロメット１０が貫通孔２の周縁部に取り付けられたとき、遮音部１５の基端部にある内周縁部１５ｃの一部が貫通孔２の内方に位置していてもよい。 In this embodiment, the umbrella-shaped sound insulation portion 15 is configured to be able to be folded back with the turn-back portion 22 as a base point so that the contact side surface 15b of the sound insulation portion 15 faces radially outward of the grommet body 11 . The contact side surface 15 b is an inner side surface of the front and back surfaces of the sound insulation portion 15 that contacts the peripheral portion of the through hole 2 . The sound insulation portion 15 in a state in which the contact side surface 15b of the sound insulation portion 15 is folded back so as to face the radially outer side of the grommet body 11 exhibits a fold shape in which a plurality of folds 23 are provided in the circumferential direction. The outer diameter D1 of 15 is smaller than the inner diameter D2 of the through hole 2 (D1<D2). In order to make the position where the contact side surface 15b of the sound insulation part 15 is bent higher than the outer peripheral edge part 15a, the folded part 22 is longer than the outer peripheral edge part 15a of the sound insulation part 15 from the vehicle body panel 1 to the grommet body 11. provided at positions separated in the vertical direction. Further, the folded portion 22 includes a folded groove 24 formed in the contact side surface 15b of the sound insulating portion 15 along the circumferential direction. In other words, the contact side surface 15b of the sound insulation portion 15 is provided with a turn-back groove 24 in order to make a part of the contact side surface 15b of the sound insulation portion 15 thin so that it can be easily bent in a certain direction of the peripheral surface of the through hole 2. there is On the other hand, the inner peripheral edge portion 15c of the sound insulation portion 15, which is the connection portion with the second enlarged diameter cylindrical portion 21, is provided at a position lower than the outer peripheral edge portion 15a. When the grommet 10 is attached to the peripheral portion of the through hole 2 , a portion of the inner peripheral portion 15 c at the base end portion of the sound insulating portion 15 may be positioned inside the through hole 2 .

本実施形態では、第２拡径筒部２１の外面と遮音部１５の非当接側面１５ｄとの間には、グロメット本体１１の周方向に沿って環状溝２５が形成されている。非当接側面１５ｄは、遮音部１５の表裏面のうち、内側面（当接側面１５ｂ）とは反対側の面である外側面である。遮音部１５が第２小径筒部１４の外面から延出するように形成される場合、環状溝２５は、第２小径筒部１４の外面と遮音部１５の非当接側面１５ｄとの間に形成されてもよい。 In this embodiment, an annular groove 25 is formed along the circumferential direction of the grommet body 11 between the outer surface of the second diameter-enlarged cylindrical portion 21 and the non-contact side surface 15 d of the sound insulation portion 15 . The non-contact side surface 15 d is an outer side surface of the front and back surfaces of the sound insulation portion 15 that is opposite to the inner side surface (contact side surface 15 b ). When the sound insulation portion 15 is formed to extend from the outer surface of the second small-diameter cylindrical portion 14 , the annular groove 25 is formed between the outer surface of the second small-diameter cylindrical portion 14 and the non-contact side surface 15 d of the sound insulation portion 15 . may be formed.

なお、本実施形態の図示例では、図１及び図２に示すように遮音部１５が拡開した状態において、遮音部１５にヒダ形状が残っていないが、遮音部１５が拡開した状態の形状はこれに限定されるものではなく、遮音部１５にヒダ形状が若干残っていてもよい。また、図１及び図２に示すように遮音部１５が拡開した状態における外周縁部１５ａの周長は、図４及び図５に示すように遮音部１５が収縮した状態における外周縁部１５ａの周長とほぼ同一であるものとする。 In the illustrated example of the present embodiment, when the sound insulation part 15 is expanded as shown in FIG. 1 and FIG. The shape is not limited to this, and the sound insulation portion 15 may have some folds. 1 and 2, the peripheral length of the outer peripheral edge portion 15a in the state in which the sound insulating portion 15 is expanded is the same as that in the state in which the sound insulating portion 15 is contracted, as shown in FIGS. It shall be almost the same as the circumference of

図３に示されるインナープロテクタ３０は、グロメット本体１１を支持し、且つ、貫通孔２の周縁部に保持される環状部材である。インナープロテクタ３０は、樹脂等、グロメット本体１１よりも剛性の高い材料で形成される。また、インナープロテクタ３０は、インナープロテクタ３０自身の中心軸を含む仮想平面で二分割された一対の部材、すなわち、第１インナー部材３１ａと第２インナー部材３１ｂとの組み合わせで構成される。 The inner protector 30 shown in FIG. 3 is an annular member that supports the grommet body 11 and is held at the peripheral portion of the through hole 2 . The inner protector 30 is made of a material having higher rigidity than the grommet body 11, such as resin. In addition, the inner protector 30 is composed of a pair of members divided into two along a virtual plane including the central axis of the inner protector 30 itself, that is, a combination of a first inner member 31a and a second inner member 31b.

インナープロテクタ３０は、全体として、複数の壁部で構成される環状の構造体である本体部３２と、環状の板体である鍔部３３とを有する。 The inner protector 30 as a whole has a body portion 32 that is an annular structure composed of a plurality of wall portions, and a collar portion 33 that is an annular plate.

本体部３２は、例えば、外周壁３２ａと、上壁３２ｂと、内周壁３２ｃとを含む。外周壁３２ａは、グロメット１０が貫通孔２の周縁部に取り付けられるときに、車体パネル１の平面方向に沿って貫通孔２の周縁部と対向する壁部である。上壁３２ｂは、外周壁３２ａの上方の周端と外周端で連続し、内周側に向けて延設される壁部である。内周壁３２ｃは、上壁３２ｂの内周端と連続し、外周壁３２ａとおおよそ平行である壁部である。 The body portion 32 includes, for example, an outer peripheral wall 32a, an upper wall 32b, and an inner peripheral wall 32c. The outer peripheral wall 32 a is a wall portion that faces the peripheral edge portion of the through hole 2 along the planar direction of the vehicle body panel 1 when the grommet 10 is attached to the peripheral edge portion of the through hole 2 . The upper wall 32b is a wall portion that is continuous with the upper peripheral end and the outer peripheral end of the outer peripheral wall 32a and extends toward the inner peripheral side. The inner peripheral wall 32c is a wall portion that is continuous with the inner peripheral end of the upper wall 32b and is approximately parallel to the outer peripheral wall 32a.

鍔部３３は、内周壁３２ｃの下方の周端から内側に向かって放射状に突出する。鍔部３３は、前述のとおり、インナープロテクタ３０がグロメット本体１１に接続されるとき、嵌合溝１６に嵌合される。また、鍔部３３は、嵌合溝１６に予め形成されている凹部１８の位置に合わせて、嵌合溝１６に嵌合したときに凹部１８を係合させる凸部３３ａを有する。凸部３３ａと凹部１８との係合により、大径筒部１２の中心軸を基準としたグロメット本体１１に対するインナープロテクタ３０の回転が抑止される。なお、凸部３３ａは、第１インナー部材３１ａと第２インナー部材３１ｂとの各々の鍔部３３にそれぞれ形成されていてもよい。一方、グロメット本体１１の嵌合溝１６には、それぞれの凸部３３ａに対応した複数の凹部１８が形成されていてもよい。 The flange portion 33 radially protrudes inward from the lower peripheral edge of the inner peripheral wall 32c. As described above, the collar portion 33 is fitted into the fitting groove 16 when the inner protector 30 is connected to the grommet body 11 . Moreover, the flange portion 33 has a protrusion 33a which is aligned with the position of the recess 18 formed in advance in the fitting groove 16 and engages the recess 18 when fitted into the fitting groove 16 . Rotation of the inner protector 30 with respect to the grommet body 11 about the center axis of the large-diameter cylindrical portion 12 is suppressed by the engagement between the convex portion 33 a and the concave portion 18 . In addition, the convex portion 33a may be formed on each of the flange portions 33 of the first inner member 31a and the second inner member 31b. On the other hand, the fitting groove 16 of the grommet body 11 may be formed with a plurality of concave portions 18 corresponding to the respective convex portions 33a.

ここで、インナープロテクタ３０が第１インナー部材３１ａと第２インナー部材３１ｂとの一対の部材の組み合わせである場合、第１インナー部材３１ａと第２インナー部材３１ｂとは、互いに同一の半環形状であってもよい。また、第１インナー部材３１ａと第２インナー部材３１ｂとは、互いに組み合わされたときに、互いに周方向で突き合わされる２つの側壁３２ｄを含む。２つの側壁３２ｄのうち、一方の側壁３２ｄには、爪部３４が設けられ、他方の側壁３２ｄには、溝部３５が設けられている。第１インナー部材３１ａと第２インナー部材３１ｂとが組み合わせられるとき、第１インナー部材３１ａの爪部３４が第２インナー部材３１ｂの溝部３５に嵌合し、第２インナー部材３１ｂの爪部３４が第１インナー部材３１ａの溝部３５に嵌合される。 Here, when the inner protector 30 is a combination of a pair of the first inner member 31a and the second inner member 31b, the first inner member 31a and the second inner member 31b have the same semi-ring shape. There may be. Also, the first inner member 31a and the second inner member 31b include two side walls 32d that face each other in the circumferential direction when they are combined with each other. Of the two side walls 32d, one side wall 32d is provided with a claw portion 34, and the other side wall 32d is provided with a groove portion 35. As shown in FIG. When the first inner member 31a and the second inner member 31b are combined, the claw portions 34 of the first inner member 31a fit into the groove portions 35 of the second inner member 31b, and the claw portions 34 of the second inner member 31b It fits into the groove portion 35 of the first inner member 31a.

なお、第１インナー部材３１ａと第２インナー部材３１ｂとは、爪部３４及び溝部３５による接続機構に代えて、例えばヒンジ部を介して連結されてもよい。また、ここではインナープロテクタ３０が２つのインナー部材に分割される場合を例示したが、３つ以上のインナー部材に分割されてもよい。 Note that the first inner member 31a and the second inner member 31b may be connected via, for example, a hinge instead of the connection mechanism using the claw portions 34 and the groove portions 35 . Moreover, although the case where the inner protector 30 is divided into two inner members is illustrated here, it may be divided into three or more inner members.

また、インナープロテクタ３０は、本体部３２の一部が貫通孔２に挿入されたときに、本体部３２を貫通孔２の周縁に係止される複数のインナーロック４０を有する。本実施形態では、インナーロック４０は、インナープロテクタ３０の全体として、周方向に等間隔で４箇所に設けられている。つまり、第１インナー部材３１ａ及び第２インナー部材３１ｂとしては、インナーロック４０は、それぞれのインナー部材に２箇所ずつ設けられている。なお、インナーロック４０の設置数は、特に限定されるものではなく、４つ以外であってもよい。 The inner protector 30 also has a plurality of inner locks 40 that lock the body portion 32 to the periphery of the through hole 2 when part of the body portion 32 is inserted into the through hole 2 . In the present embodiment, the inner locks 40 are provided at four locations in the inner protector 30 as a whole at equal intervals in the circumferential direction. That is, the inner locks 40 are provided at two locations on each of the first inner member 31a and the second inner member 31b. The number of inner locks 40 to be installed is not particularly limited, and may be other than four.

インナーロック４０は、ロック爪４１を含む。 The inner lock 40 includes lock claws 41 .

ロック爪４１は、本体部３２の外周壁３２ａに沿って設けられ、外周壁３２ａの内側と外側とを結ぶ方向で弾性変形する。ロック爪４１は、貫通孔２の周縁部と接触又は係合する突起部を有する。ここで、突起部が貫通孔２の周縁部に係合する状態とは、インナーロック４０が本体部３２を貫通孔２の周縁部に係止させたとき、すなわち、グロメット１０が貫通孔２の周縁部に取り付けられたときの、貫通孔２に対する突起部の状態をいう。突起部は、外周壁３２ａの周方向に沿った稜線を頂点部として外方に突出し、常時、外周壁３２ａの外周よりも外側にある。つまり、ロック爪４１の弾性変形は、突起部が貫通孔２の周縁部と接触していることに伴う、突起部の変位により生じる。そして、突起部が貫通孔２の周縁部に係合している状態では、突起部の下端溝に貫通孔２の周縁部が入り込むことで、本体部３２は、貫通孔２の周縁部に対して一定の姿勢に維持される。 The lock claw 41 is provided along the outer peripheral wall 32a of the body portion 32 and elastically deforms in a direction connecting the inner side and the outer side of the outer peripheral wall 32a. The lock claw 41 has a protrusion that contacts or engages with the peripheral edge of the through hole 2 . Here, the state in which the protruding portion is engaged with the peripheral portion of the through hole 2 means that the inner lock 40 locks the main body portion 32 to the peripheral portion of the through hole 2 , that is, the grommet 10 is attached to the peripheral portion of the through hole 2 It refers to the state of the protrusion with respect to the through-hole 2 when attached to the peripheral portion. The protruding portion protrudes outward from a ridge along the circumferential direction of the outer peripheral wall 32a, and is always outside the outer periphery of the outer peripheral wall 32a. That is, the elastic deformation of the lock claw 41 is caused by the displacement of the projection caused by the contact of the projection with the peripheral portion of the through hole 2 . In a state where the protrusion is engaged with the peripheral edge of the through hole 2 , the peripheral edge of the through hole 2 enters the lower end groove of the protrusion. maintained in a constant position.

なお、インナープロテクタ３０では、インナーロック４０が周方向に４箇所に設けられているので、計４つのロック爪４１に含まれる各々の突起部は、本体部３２の中心軸を基準とした放射方向に沿って突出することになる。 In the inner protector 30, since the inner locks 40 are provided at four locations in the circumferential direction, the projections included in the total four lock claws 41 are radially aligned with respect to the central axis of the body portion 32. will protrude along the

次に、グロメット１０の作用について説明する。 Next, the action of the grommet 10 will be described.

まず、グロメット１０の組み立てについて、作業者は、内周側に電線Ｗを配策させているグロメット本体１１を準備し、インナープロテクタ３０をグロメット本体１１の大径筒部１２に装着する。ここで、インナープロテクタ３０は、第１インナー部材３１ａと第２インナー部材３１ｂとに予め分割されている。そのため、車体パネル１にある貫通孔２に電線Ｗがすでに貫通されている場合、グロメット本体１１の大径筒部１２を両側から挟むようにインナー部材同士を組み合わせることで、インナープロテクタ３０をグロメット本体１１の大径筒部１２に容易に装着できる。このような作業により、電線Ｗにグロメット１０が装着される。 First, to assemble the grommet 10 , an operator prepares the grommet body 11 in which the wires W are routed on the inner peripheral side, and attaches the inner protector 30 to the large-diameter cylindrical portion 12 of the grommet body 11 . Here, the inner protector 30 is divided in advance into a first inner member 31a and a second inner member 31b. Therefore, when the electric wire W has already passed through the through-hole 2 in the vehicle body panel 1, the inner protector 30 can be replaced with the grommet body by combining the inner members so as to sandwich the large-diameter cylindrical portion 12 of the grommet body 11 from both sides. 11 can be easily attached to the large-diameter cylindrical portion 12 . The grommet 10 is attached to the electric wire W by such work.

次に、グロメット１０の貫通孔２の周縁部への取り付けについて、作業者は、未だ電線Ｗが貫通孔２に貫通されていない場合には、グロメット本体１１の第２小径筒部１４側から露出している電線Ｗを貫通孔２に貫通させる。次に、作業者は、インナープロテクタ３０の本体部３２を貫通孔２に挿入させながら、グロメット１０全体を貫通孔２の側に押し付ける。このとき、インナーロック４０の各々のロック爪４１は、突起部が貫通孔２の周縁部に接触しながら変位することで弾性変形するため、本体部３２の貫通孔２への挿入が許容される。本体部３２は、挿入完了位置まで挿入されると、各々のロック爪４１が弾性復帰することで貫通孔２の周縁部に係止される。このようにインナープロテクタ３０が係止状態にあるとき、グロメット本体１１のリップ部１７は、車体パネル１の表面上にある、貫通孔２の周縁面に密着する。つまり、車体パネル１は、インナープロテクタ３０側の突起部とグロメット本体１１側のリップ部１７とによって挟持される。結果として、グロメット１０は、貫通孔２を閉塞するように、貫通孔２の周縁部に取り付けられる。 Next, regarding the attachment of the grommet 10 to the peripheral portion of the through hole 2, if the electric wire W has not been passed through the through hole 2 yet, the operator should expose it from the second small-diameter cylindrical portion 14 side of the grommet main body 11. The electric wire W which is connected is passed through the through hole 2. - 特許庁Next, the operator presses the entire grommet 10 toward the through hole 2 while inserting the body portion 32 of the inner protector 30 into the through hole 2 . At this time, each lock claw 41 of the inner lock 40 is elastically deformed by displacing the protruding portion while contacting the peripheral edge portion of the through hole 2, so that the insertion of the body portion 32 into the through hole 2 is permitted. . When the main body portion 32 is inserted to the insertion completion position, the lock claws 41 are elastically restored, so that the main body portion 32 is locked to the peripheral portion of the through hole 2 . When the inner protector 30 is thus locked, the lip portion 17 of the grommet body 11 is in close contact with the peripheral surface of the through hole 2 on the surface of the vehicle body panel 1 . That is, the vehicle body panel 1 is sandwiched between the protrusion on the inner protector 30 side and the lip portion 17 on the grommet body 11 side. As a result, the grommet 10 is attached to the periphery of the through hole 2 so as to close the through hole 2 .

更に、グロメット１０の取り付けに際して、傘状の遮音部１５は、折返部分２２を基点として遮音部１５の当接側面１５ｂがグロメット本体１１の径方向外側を向くように折り返した状態（図４及び図５参照）とされる。遮音部１５の当接側面１５ｂがグロメット本体１１の径方向外側を向くように折り返された状態の遮音部１５は、周方向にヒダ２３が複数設けられたヒダ形状を呈し、その状態における遮音部１５の外径Ｄ１が貫通孔２の内径Ｄ２よりも小さい。このため、図４及び図５に示すように遮音部１５が収縮した状態でグロメット１０を貫通孔２に挿入することにより、遮音部１５が貫通孔２の周縁部と干渉することが抑制されるため、グロメット１０を貫通孔２に容易に挿入することができる。そして、前述のようにグロメット１０を貫通孔２の周縁部に取り付けた後に、遮音部１５を車体パネル１の方向に折り曲げることにより拡開させ、遮音部１５の外周縁部１５ａを車体パネル１の表面にある貫通孔２の周縁面に密着させる。 Furthermore, when the grommet 10 is attached, the umbrella-shaped sound insulation portion 15 is folded back so that the contact side surface 15b of the sound insulation portion 15 faces radially outward of the grommet body 11 with the folding portion 22 as a base point (FIGS. 4 and 4). 5). The sound insulation portion 15 in a state in which the contact side surface 15b of the sound insulation portion 15 is folded back so as to face the radially outer side of the grommet body 11 exhibits a fold shape in which a plurality of folds 23 are provided in the circumferential direction. The outer diameter D1 of 15 is smaller than the inner diameter D2 of the through hole 2 . Therefore, by inserting the grommet 10 into the through hole 2 with the sound insulating portion 15 contracted as shown in FIGS. Therefore, the grommet 10 can be easily inserted into the through hole 2 . After the grommet 10 is attached to the peripheral edge of the through hole 2 as described above, the sound insulating portion 15 is bent toward the vehicle body panel 1 to expand the outer peripheral edge portion 15 a of the sound insulating portion 15 to the vehicle body panel 1 . It is brought into close contact with the peripheral surface of the through hole 2 on the surface.

次に、グロメット１０の効果について説明する。 Next, the effect of the grommet 10 will be described.

本実施形態の第一の態様に係るグロメット１０は、被取付部材（車体パネル１）にある貫通孔２を貫通する電線Ｗを内周側で保持するグロメット本体１１を備える。グロメット本体１１は、貫通孔２の周縁部に係止される大径筒部１２と、貫通孔２の開口部分の一方側に配置される第１小径筒部１３と、貫通孔２の開口部分の他方側に配置される第２小径筒部１４と、を有する。グロメット本体１１は、グロメット本体１１の内周側から外周側へと延在し、貫通孔２の開口部分を他方側から覆う傘状の遮音部１５を有する。遮音部１５は、折返部分２２を基点として遮音部１５の内側面（当接側面１５ｂ）がグロメット本体１１の径方向外側を向くように折り返すことができるよう構成される。遮音部１５の内側面（当接側面１５ｂ）がグロメット本体１１の径方向外側を向くように折り返された状態の遮音部１５は、周方向にヒダ２３が複数設けられたヒダ形状を呈し、その状態における遮音部１５の外径Ｄ１が貫通孔２の内径Ｄ２よりも小さい。 A grommet 10 according to a first aspect of the present embodiment includes a grommet body 11 that holds, on the inner peripheral side, a wire W passing through a through hole 2 in a mounted member (vehicle body panel 1). The grommet body 11 includes a large-diameter cylindrical portion 12 that is engaged with the peripheral portion of the through-hole 2 , a first small-diameter cylindrical portion 13 that is disposed on one side of the opening portion of the through-hole 2 , and an opening portion of the through-hole 2 . and a second small-diameter cylindrical portion 14 arranged on the other side of the . The grommet body 11 has an umbrella-shaped sound insulation portion 15 that extends from the inner peripheral side to the outer peripheral side of the grommet body 11 and covers the opening portion of the through hole 2 from the other side. The sound insulation portion 15 is configured to be able to be folded back so that the inner side surface (contact side surface 15 b ) of the sound insulation portion 15 faces radially outward of the grommet body 11 with the folded portion 22 as a base point. The sound insulation portion 15, which is folded back so that the inner side surface (contact side surface 15b) of the sound insulation portion 15 faces the radially outer side of the grommet body 11, has a fold shape in which a plurality of folds 23 are provided in the circumferential direction. The outer diameter D1 of the sound insulation portion 15 in this state is smaller than the inner diameter D2 of the through hole 2 .

遮音部１５は、第２拡径筒部２１の外面から延出する傘状又は鍔状に形成され、遮音部１５が図１及び図２に示すように拡開された状態における遮音部１５の外径は貫通孔２の内径Ｄ２よりも大きい。その一方、遮音部１５の当接側面１５ｂがグロメット本体１１の径方向外側を向くように折り返された状態の遮音部１５は、周方向にヒダ２３が複数設けられたヒダ形状を呈し、その状態における遮音部１５の外径Ｄ１が貫通孔２の内径Ｄ２よりも小さい。そのため、図４及び図５に示すように遮音部１５が収縮した状態でグロメット１０を貫通孔２に挿入することにより、遮音部１５が貫通孔２の周縁部と干渉することが抑制されるため、グロメット１０を貫通孔２に容易に挿入することができる。 The sound insulation part 15 is formed in an umbrella shape or a flange shape extending from the outer surface of the second diameter-enlarged cylindrical part 21, and the sound insulation part 15 in a state in which the sound insulation part 15 is expanded as shown in FIGS. The outer diameter is larger than the inner diameter D2 of the through hole 2 . On the other hand, the sound insulation portion 15 in a state where the contact side surface 15b of the sound insulation portion 15 is folded back so as to face the radially outer side of the grommet body 11 exhibits a fold shape in which a plurality of folds 23 are provided in the circumferential direction. , the outer diameter D1 of the sound insulation portion 15 is smaller than the inner diameter D2 of the through hole 2 . Therefore, by inserting the grommet 10 into the through hole 2 with the sound insulating portion 15 contracted as shown in FIGS. , the grommet 10 can be easily inserted into the through hole 2 .

以上のように、本実施形態によれば、貫通孔２の周縁部に取り付けられる際の作業時に車体パネル１と干渉することを抑制でき、貫通孔２の周縁部に取り付けられる際の作業性を向上させるのに有利なグロメット１０を提供することができる。 As described above, according to the present embodiment, it is possible to suppress interference with the vehicle body panel 1 during the work for attaching to the peripheral portion of the through hole 2, and to improve workability when attaching to the peripheral portion of the through hole 2. A grommet 10 can be provided which is advantageous for enhancing.

本実施形態の第二の態様に係るグロメット１０において、折返部分２２は、遮音部１５の外周縁部１５ａよりも被取付部材（車体パネル１）からグロメット本体１１の長さ方向において離れた位置に設けられる。 In the grommet 10 according to the second aspect of the present embodiment, the folded portion 22 is located at a position farther in the length direction of the grommet body 11 from the attached member (vehicle panel 1) than the outer peripheral edge portion 15a of the sound insulating portion 15. be provided.

遮音部１５の当接側面１５ｂを折り曲げる位置を外周縁部１５ａに対して高い位置にすることにより、遮音部１５が図１及び図２に示すように拡開した状態から、遮音部１５が図４及び図５に示すように収縮した状態に戻り難くすることができる。また、遮音部１５が拡開した状態において、遮音部１５の外周縁部１５ａが車体パネル１を押える力を発生させることができ、遮音部１５の外周縁部１５ａを貫通孔２の周縁面に密着させることができる。 By setting the position where the contact side surface 15b of the sound insulation part 15 is bent to a position higher than the outer peripheral edge part 15a, the sound insulation part 15 can be opened from the state in which the sound insulation part 15 is expanded as shown in FIGS. 4 and 5, it is possible to make it difficult to return to the contracted state. In addition, when the sound insulation part 15 is expanded, the outer peripheral edge part 15a of the sound insulation part 15 can generate a force to press the vehicle body panel 1, and the outer peripheral edge part 15a of the sound insulation part 15 is placed on the peripheral surface of the through hole 2. can be adhered.

本実施形態の第三の態様に係るグロメット１０において、第２小径筒部１４と大径筒部１２との間には拡径筒部（第２拡径筒部２１）が設けられ、遮音部１５は、第２小径筒部１４又は拡径筒部（第２拡径筒部２１）の外面から延出するように形成される。第２小径筒部１４又は拡径筒部（第２拡径筒部２１）の外面と遮音部１５の外周面（非当接側面１５ｄ）との間には、グロメット本体１１の周方向に沿って延びる環状溝２５が形成される。 In the grommet 10 according to the third aspect of the present embodiment, a diameter-enlarged cylindrical portion (second diameter-enlarged cylindrical portion 21) is provided between the second small-diameter cylindrical portion 14 and the large-diameter cylindrical portion 12, and a sound insulation portion 15 is formed to extend from the outer surface of the second small diameter tubular portion 14 or the enlarged diameter tubular portion (the second enlarged diameter tubular portion 21). Along the circumferential direction of the grommet body 11, between the outer surface of the second small diameter tubular portion 14 or the enlarged diameter tubular portion (second enlarged diameter tubular portion 21) and the outer peripheral surface (non-contact side surface 15d) of the sound insulation portion 15. An annular groove 25 is formed extending along the length of the groove.

第２小径筒部１４又は第２拡径筒部２１の外面と遮音部１５の非当接側面１５ｄとの間に環状溝２５を設ける。これにより、遮音部１５を収縮した状態から拡開した状態へと裏返しにする際に遮音部１５の基端部の楕円形状に変化しようとする部分を環状溝２５で逃がすことができ、遮音部１５を裏返しにする際の力を低減することができる。また、電線Ｗにグロメット１０が装着された状態で内方の電線Ｗを捌いても、電線Ｗの動きが遮音部１５の全体に伝わり難く、遮音部１５が拡開した状態から収縮した状態に戻り難くすることができる。 An annular groove 25 is provided between the outer surface of the second small-diameter cylindrical portion 14 or the second enlarged-diameter cylindrical portion 21 and the non-contact side surface 15 d of the sound insulation portion 15 . As a result, when the sound insulation part 15 is turned over from the contracted state to the expanded state, the portion of the base end of the sound insulation part 15 that is about to change to an elliptical shape can be escaped by the annular groove 25, and the sound insulation part The force in turning 15 inside out can be reduced. In addition, even if the electric wire W inside the electric wire W is handled with the grommet 10 attached to the electric wire W, the movement of the electric wire W is difficult to be transmitted to the entire sound insulation portion 15, and the sound insulation portion 15 changes from the expanded state to the contracted state. can make it difficult to return.

本実施形態に係るワイヤーハーネスは、上述の第一から第三の態様のいずれかの態様のグロメット１０を備える。 The wire harness according to this embodiment includes the grommet 10 of any one of the first to third aspects described above.

本実施形態によれば、貫通孔２の周縁部に取り付けられる際の作業時に車体パネル１と干渉することを抑制でき、貫通孔２の周縁部に取り付けられる際の作業性を向上させるのに有利なワイヤーハーネスを提供することができる。 According to the present embodiment, it is possible to suppress interference with the vehicle body panel 1 during work when attaching to the peripheral portion of the through hole 2, which is advantageous in improving workability when attaching to the peripheral portion of the through hole 2. We can provide you with the perfect wiring harness.

［第２の実施形態］
次に、第２の実施形態に係るグロメット１０Ａについて説明する。なお、上述のグロメット１０と実質的に同一の構成部分は同一符号を付して、その説明を省略する。 [Second embodiment]
Next, grommet 10A concerning a 2nd embodiment is explained. In addition, the same code|symbol is attached|subjected to the component substantially same as the above-mentioned grommet 10, and the description is abbreviate|omitted.

図６は、第２の実施形態に係るグロメット１０Ａの斜視図であり、図７は、第２の実施形態に係るグロメット１０Ａの断面図である。また、図８は、グロメット１０Ａの分解図である。さらに、図９は、第２の実施形態における傘状の遮音部１５を拡開した状態から収縮した状態を示す斜視図であり、図１０は、第２の実施形態における傘状の遮音部１５を拡開した状態から収縮した状態を示す断面図である。 FIG. 6 is a perspective view of a grommet 10A according to the second embodiment, and FIG. 7 is a cross-sectional view of the grommet 10A according to the second embodiment. Moreover, FIG. 8 is an exploded view of the grommet 10A. Furthermore, FIG. 9 is a perspective view showing the state in which the umbrella-shaped sound insulation part 15 in the second embodiment is contracted from the expanded state, and FIG. 10 is the umbrella-shaped sound insulation part 15 in the second embodiment. is a cross-sectional view showing a contracted state from an expanded state.

この実施形態に係るグロメット１０Ａでは、遮音部１５の外周縁部１５ａには、遮音部１５が図６及び図７に示すように拡開されたときに車体パネル１と遮音部１５の外周縁部１５ａとの間の隙間を塞ぐための閉塞部２６が設けられている。この実施形態では、遮音部１５にヒダ形状が若干残っており、閉塞部２６は、車体パネル１と遮音部１５の外周縁部１５ａとの間に生じ得る隙間を塞ぐために、遮音部１５の外周縁部１５ａに対してグロメット本体１１Ａの周方向に複数設けられている。また、閉塞部２６は、遮音部１５におけるヒダ２３の山部に設けられていてもよい。この実施形態に係るグロメット１０Ａによれば、傘状の遮音部１５が拡開されたときに、閉塞部２６が車体パネル１と遮音部１５の外周縁部１５ａとの間の隙間を塞ぐことにより、遮音部１５の遮音性を向上させることができる。 In the grommet 10A according to this embodiment, the outer peripheral edge portion 15a of the sound insulating portion 15 has an outer peripheral edge portion between the vehicle body panel 1 and the sound insulating portion 15 when the sound insulating portion 15 is expanded as shown in FIGS. A closing portion 26 is provided for closing the gap between the 15a. In this embodiment, the sound insulation part 15 has a slight pleat shape, and the blocking part 26 is provided outside the sound insulation part 15 in order to close a gap that may occur between the vehicle body panel 1 and the outer peripheral edge part 15 a of the sound insulation part 15 . A plurality of them are provided in the circumferential direction of the grommet main body 11A with respect to the peripheral portion 15a. Also, the closing portion 26 may be provided on the peak portion of the folds 23 in the sound insulation portion 15 . According to the grommet 10A according to this embodiment, when the umbrella-shaped sound insulation portion 15 is expanded, the closing portion 26 closes the gap between the vehicle body panel 1 and the outer peripheral edge portion 15a of the sound insulation portion 15. , the sound insulation of the sound insulation part 15 can be improved.

また、この実施形態に係るグロメット１０Ａでは、遮音部１５における外周縁部１５ａ近傍の非当接側面１５ｄには、グロメット本体１１Ａの径方向に沿って延びる溝部２７が設けられている。この実施形態では、溝部２７は、閉塞部２６が設けられた遮音部１５の外周縁部１５ａに対してグロメット本体１１Ａの周方向に間隔をおいて複数設けられている。また、溝部２７は、遮音部１５におけるヒダ２３の山部に設けられていてもよい。この実施形態に係るグロメット１０Ａによれば、溝部２７が遮音部１５の非当接側面１５ｄに設けられていることにより、傘状の遮音部１５の柔軟性を高めることができ、車体パネル１とグロメット１０Ａとの間に生じ得る隙間を最小限にすることが可能になる。 Further, in the grommet 10A according to this embodiment, a groove portion 27 extending along the radial direction of the grommet body 11A is provided on the non-contact side surface 15d of the sound insulating portion 15 near the outer peripheral edge portion 15a. In this embodiment, a plurality of groove portions 27 are provided at intervals in the circumferential direction of the grommet body 11A with respect to the outer peripheral edge portion 15a of the sound insulation portion 15 provided with the closing portion 26 . Further, the groove portion 27 may be provided in the crest portion of the pleats 23 in the sound insulation portion 15 . According to the grommet 10A according to this embodiment, since the groove 27 is provided on the non-contact side surface 15d of the sound insulation portion 15, the flexibility of the umbrella-shaped sound insulation portion 15 can be increased, and the vehicle body panel 1 and the It becomes possible to minimize the gap that may occur between the grommet 10A.

また、この実施形態に係るグロメット１０Ａでは、遮音部１５の非当接側面１５ｄには、グロメット本体１１Ａの径方向に沿って延びるリブ２８が設けられている。この実施形態では、リブ２８は、遮音部１５の非当接側面１５ｄにグロメット本体１１Ａの周方向に間隔をおいて複数設けられている。また、リブ２８は、遮音部１５におけるヒダ２３の山部に設けられていてもよい。この実施形態に係るグロメット１０Ａによれば、リブ２８が遮音部１５の非当接側面１５ｄに設けられていることにより、傘状の遮音部１５の剛性を高めて、遮音部１５を拡開させる作業の際に遮音部１５が貫通孔２側に凹むのを抑制することが可能になる。 Further, in the grommet 10A according to this embodiment, the non-contact side surface 15d of the sound insulating portion 15 is provided with a rib 28 extending along the radial direction of the grommet body 11A. In this embodiment, a plurality of ribs 28 are provided on the non-contact side surface 15d of the sound insulation portion 15 at intervals in the circumferential direction of the grommet body 11A. Also, the ribs 28 may be provided on the crests of the folds 23 in the sound insulation portion 15 . According to the grommet 10A according to this embodiment, the rib 28 is provided on the non-contact side surface 15d of the sound insulation portion 15, thereby increasing the rigidity of the umbrella-shaped sound insulation portion 15 and expanding the sound insulation portion 15. It is possible to prevent the sound insulation part 15 from being dented toward the through hole 2 during work.

また、この実施形態に係るグロメット１０Ａでは、折返部分２２が、遮音部１５の当接側面１５ｂに周方向に沿って形成された第１の折返溝２４と、遮音部１５の非当接側面１５ｄに周方向に沿って形成された第２の折返溝２９とを含む。つまり、遮音部１５の当接側面１５ｂには、遮音部１５の当接側面１５ｂの一部を薄肉にして貫通孔２の周縁面のある方向に折り曲げ易くするために第１の折返溝２４が設けられている。その一方、遮音部１５の非当接側面１５ｄには、遮音部１５の非当接側面１５ｄの一部を薄肉にして貫通孔２の周縁面のある方向に折り曲げ易くするために第２の折返溝２９が設けられている。この実施形態に係るグロメット１０Ａによれば、折返部分２２が、遮音部１５の当接側面１５ｂ側の第１の折返溝２４と、遮音部１５の非当接側面１５ｄ側の第２の折返溝２９とを含むことにより、遮音部１５を折り返す際の基点を一定にすることが可能になる。 In addition, in the grommet 10A according to this embodiment, the folded portion 22 includes the first folded groove 24 formed along the circumferential direction in the contact side surface 15b of the sound insulation portion 15 and the non-contact side surface 15d of the sound insulation portion 15. and a second turn-up groove 29 formed along the circumferential direction. That is, the contact side surface 15b of the sound insulation portion 15 has a first turn-back groove 24 in order to make the contact side surface 15b of the sound insulation portion 15 partially thin so that it can be easily bent in a certain direction of the peripheral surface of the through hole 2. is provided. On the other hand, on the non-contact side surface 15d of the sound insulation portion 15, a part of the non-contact side surface 15d of the sound insulation portion 15 is made thin so that it can be easily bent in a certain direction of the peripheral surface of the through hole 2, so that a second fold is formed. A groove 29 is provided. According to the grommet 10A according to this embodiment, the folded portion 22 has the first folded groove 24 on the contact side surface 15b side of the sound insulation portion 15 and the second folded groove on the non-contact side surface 15d side of the sound insulation portion 15. 29, it becomes possible to make the base point for folding back the sound insulation portion 15 constant.

また、図８に示すように、インナープロテクタ３０Ａの本体部３２Ａにおける外周壁３２ａには、インナープロテクタ３０Ａがグロメット本体１１Ａに対して傾いた状態で取り付けられることを抑制するためにリブ３６が設けられている。この実施形態に係るグロメット１０Ａでは、インナープロテクタ３０Ａの本体部３２Ａにおける外周壁３２ａには、ロック爪４１を挟んで設けられる一対のリブ３６，３６と、周方向に隣り合うロック爪４１間の中間位置に設けられるリブ３６とが形成されている。この実施形態に係るグロメット１０Ａによれば、インナープロテクタ３０Ａが傾き抑制用のリブ３６を有することにより、貫通孔２の内周面とリブ３６とが当接してロック爪４１へ掛かる負荷を低減することが可能になる。 Further, as shown in FIG. 8, ribs 36 are provided on the outer peripheral wall 32a of the main body portion 32A of the inner protector 30A to prevent the inner protector 30A from being attached to the grommet main body 11A in an inclined state. ing. In the grommet 10A according to this embodiment, the outer peripheral wall 32a of the main body portion 32A of the inner protector 30A is provided with a pair of ribs 36, 36 provided with the locking claw 41 therebetween and intermediate ribs 36 between the locking claws 41 adjacent in the circumferential direction. A rib 36 provided at the position is formed. According to the grommet 10A according to this embodiment, since the inner protector 30A has the ribs 36 for suppressing inclination, the inner peripheral surface of the through-hole 2 and the ribs 36 abut to reduce the load applied to the lock claws 41. becomes possible.

さらに、グロメット本体１１Ａの大径筒部１２及びインナープロテクタ３０Ａの本体部３２Ａにはそれぞれ、インナープロテクタ３０Ａがグロメット本体１１Ａに誤った向きで取り付けられることを抑制するために位置合わせ突起１８ａ，３７が設けられている。この実施形態に係るグロメット１０Ａでは、インナープロテクタ３０Ａ側の位置合わせ突起３７は、半円形状に形成されて、凸部３３ａの先端上面に設けられている。その一方、グロメット本体１１Ａ側の位置合わせ突起１８ａは、半円形状に形成されて、グロメット本体１１Ａの大径筒部１２において凹部１８近傍に設けられている。この実施形態に係るグロメット１０Ａでは、グロメット本体１１Ａ及びインナープロテクタ３０Ａがそれぞれ誤組み付け抑制のための位置合わせ突起１８ａ，３７を有する。このようにすることにより、インナープロテクタ３０Ａがグロメット本体１１Ａの長さ方向（上下方向）に対する向きを誤った状態でグロメット本体１１Ａに取り付けられることを抑制することが可能になる。また、目視等によりインナープロテクタ３０Ａ側の位置合わせ突起３７がグロメット本体１１Ａ側の位置合わせ突起１８ａに突き当てられたことを確認することにより、インナープロテクタ３０Ａの誤組み付けを抑制することができる。 Further, the large-diameter cylindrical portion 12 of the grommet main body 11A and the main body portion 32A of the inner protector 30A are provided with alignment protrusions 18a and 37, respectively, to prevent the inner protector 30A from being attached to the grommet main body 11A in the wrong direction. is provided. In the grommet 10A according to this embodiment, the alignment protrusion 37 on the inner protector 30A side is formed in a semicircular shape and provided on the top surface of the tip of the protrusion 33a. On the other hand, the alignment protrusion 18a on the grommet main body 11A side is formed in a semicircular shape and provided in the vicinity of the concave portion 18 in the large-diameter cylindrical portion 12 of the grommet main body 11A. In the grommet 10A according to this embodiment, the grommet main body 11A and the inner protector 30A each have alignment protrusions 18a and 37 for suppressing incorrect assembly. By doing so, it is possible to prevent the inner protector 30A from being attached to the grommet main body 11A in the wrong orientation with respect to the length direction (vertical direction) of the grommet main body 11A. Also, by visually confirming that the alignment projections 37 on the inner protector 30A side have abutted against the alignment projections 18a on the grommet body 11A side, erroneous assembly of the inner protector 30A can be suppressed.

図６～図１０に示すグロメット１０Ａによれば、上述のグロメット１０と同様に、貫通孔２の周縁部に取り付けられる際の作業時に車体パネル１と干渉することを抑制でき、貫通孔２の周縁部に取り付けられる際の作業性を向上させることが可能である。 According to the grommet 10A shown in FIGS. 6 to 10, like the grommet 10 described above, it is possible to suppress interference with the vehicle body panel 1 during the work when attaching to the peripheral edge of the through hole 2, and the peripheral edge of the through hole 2 can be suppressed. It is possible to improve the workability when attaching to the part.

［第３の実施形態］
次に、第３の実施形態に係るグロメット１０Ｂについて説明する。なお、上述のグロメット１０，１０Ａと実質的に同一の構成部分は同一符号を付して、その説明を省略する。 [Third embodiment]
Next, a grommet 10B according to a third embodiment will be described. In addition, the same code|symbol is attached|subjected to the component substantially same as the above-mentioned grommet 10,10A, and the description is abbreviate|omitted.

図１１は、第３の実施形態に係るグロメット１０Ｂの斜視図であり、図１２は、第３の実施形態に係るグロメット１０Ｂの断面図である。また、図１３は、第３の実施形態における傘状の遮音部１５を拡開した状態から収縮した状態を示す斜視図であり、図１４は、第３の実施形態における傘状の遮音部１５を拡開した状態から収縮した状態を示す断面図である。 FIG. 11 is a perspective view of a grommet 10B according to the third embodiment, and FIG. 12 is a cross-sectional view of the grommet 10B according to the third embodiment. FIG. 13 is a perspective view showing the state in which the umbrella-shaped sound insulation part 15 in the third embodiment is contracted from the expanded state, and FIG. 14 is the umbrella-shaped sound insulation part 15 in the third embodiment. is a cross-sectional view showing a contracted state from an expanded state.

図１１～図１４に示すように、この実施形態に係るグロメット１０Ｂは、インナープロテクタを備えておらず、グロメット本体１１Ｂが貫通孔２の周縁部に直接取り付けられている。グロメット本体１１Ｂの大径筒部１２の外周部には、グロメット本体１１の周方向に沿って環状壁部１２ｂが形成されている。 As shown in FIGS. 11 to 14, the grommet 10B according to this embodiment does not have an inner protector, and the grommet body 11B is directly attached to the peripheral portion of the through hole 2. As shown in FIG. An annular wall portion 12b is formed along the circumferential direction of the grommet body 11 on the outer peripheral portion of the large-diameter cylindrical portion 12 of the grommet body 11B.

図１１～図１４に示すグロメット１０Ｂによれば、上述のグロメット１０，１０Ａと同様に、貫通孔２の周縁部に取り付けられる際の作業時に車体パネル１と干渉することを抑制でき、貫通孔２の周縁部に取り付けられる際の作業性を向上させることが可能である。 According to the grommet 10B shown in FIGS. 11 to 14, like the grommets 10 and 10A described above, it is possible to suppress interference with the vehicle body panel 1 during attachment to the peripheral portion of the through hole 2. It is possible to improve the workability when attaching to the peripheral edge of the.

以上、本実施形態を説明したが、本実施形態はこれらに限定されるものではなく、本実施形態の要旨の範囲内で種々の変形が可能である。 Although the present embodiment has been described above, the present embodiment is not limited to these, and various modifications are possible within the scope of the gist of the present embodiment.

１ 車体パネル
２ 貫通孔
１０，１０Ａ，１０Ｂ グロメット
１１，１１Ａ，１１Ｂ グロメット本体
１２ 大径筒部
１３ 第１小径筒部
１４ 第２小径筒部
１５ 遮音部
１５ａ 外周縁部
１５ｂ 当接側面
１５ｄ 非当接側面
２１ 第２拡径筒部
２２ 折返部分
２３ ヒダ
２５ 環状溝
２６ 閉塞部
２７ 溝部
２８ リブ
Ｄ１ 外径
Ｄ２ 内径
Ｗ 電線 1 vehicle body panel 2 through hole 10, 10A, 10B grommet 11, 11A, 11B grommet main body 12 large diameter tubular portion 13 first small diameter tubular portion 14 second small diameter tubular portion 15 sound insulation portion 15a outer peripheral edge portion 15b contact side surface 15d non-contact Contact surface 21 Second expanded cylindrical portion 22 Folded portion 23 Fold 25 Annular groove 26 Closed portion 27 Groove 28 Rib D1 Outer diameter D2 Inner diameter W Wire

Claims (7)

被取付部材にある貫通孔を貫通する電線を内周側で保持するグロメット本体を備え、
前記グロメット本体は、
前記貫通孔の周縁部に係止される大径筒部と、
前記貫通孔の開口部分の一方側に配置される第１小径筒部と、
前記貫通孔の開口部分の他方側に配置される第２小径筒部と、
前記グロメット本体の内周側から外周側へと延在し、前記貫通孔の開口部分を前記他方側から覆う傘状の遮音部と、を有し、
前記遮音部は、折返部分を基点として前記遮音部の内側面が前記グロメット本体の径方向外側を向くように折り返すことができるよう構成され、
前記遮音部の内側面が前記グロメット本体の径方向外側を向くように折り返された状態の前記遮音部は、周方向にヒダが複数設けられたヒダ形状を呈し、その状態における前記遮音部の外径が前記貫通孔の内径よりも小さい、
グロメット。 Equipped with a grommet body that holds, on the inner peripheral side, an electric wire passing through a through-hole in a member to be mounted,
The grommet body is
a large-diameter cylindrical portion that is engaged with the peripheral portion of the through hole;
a first small-diameter cylindrical portion disposed on one side of the opening of the through hole;
a second small-diameter cylindrical portion disposed on the other side of the opening of the through hole;
an umbrella-shaped sound insulation part extending from the inner peripheral side to the outer peripheral side of the grommet body and covering the opening portion of the through hole from the other side;
The sound insulation part is configured to be able to be folded back so that the inner surface of the sound insulation part faces radially outward of the grommet body with the folded part as a base point,
The sound insulation part in a state in which the inner surface of the sound insulation part is folded back so as to face the radially outer side of the grommet body has a fold shape in which a plurality of folds are provided in the circumferential direction. a diameter smaller than the inner diameter of the through-hole,
Grommet. 前記折返部分は、前記遮音部の外周縁部よりも前記被取付部材から前記グロメット本体の長さ方向において離れた位置に設けられる、請求項１に記載のグロメット。 2. The grommet according to claim 1, wherein said folded portion is provided at a position further away from said attached member in the longitudinal direction of said grommet body than the outer peripheral edge portion of said sound insulating portion. 前記第２小径筒部と前記大径筒部との間には拡径筒部が設けられ、
前記遮音部は、前記第２小径筒部又は前記拡径筒部の外面から延出するように形成され、
前記第２小径筒部又は前記拡径筒部の外面と前記遮音部の外側面との間には、前記グロメット本体の周方向に沿って延びる環状溝が形成される、請求項１又は２に記載のグロメット。 A diameter-enlarging cylindrical portion is provided between the second small-diameter cylindrical portion and the large-diameter cylindrical portion,
The sound insulation portion is formed to extend from the outer surface of the second small diameter cylindrical portion or the enlarged diameter cylindrical portion,
An annular groove extending along the circumferential direction of the grommet body is formed between the outer surface of the second small-diameter cylindrical portion or the enlarged diameter cylindrical portion and the outer surface of the sound insulating portion. Grommets as described. 前記遮音部の外周縁部には、前記被取付部材と前記遮音部の外周縁部との間の隙間を塞ぐための閉塞部が設けられている、請求項１から３のいずれか一項に記載のグロメット。 4. The sound insulating portion according to any one of claims 1 to 3, wherein a closing portion for closing a gap between the attached member and the outer peripheral edge of the sound insulating portion is provided on the outer peripheral edge portion of the sound insulating portion. Grommets as described. 前記遮音部における前記外周縁部近傍の外側面には、前記グロメット本体の径方向に沿って延びる溝部が設けられている、請求項１から４のいずれか一項に記載のグロメット。 The grommet according to any one of claims 1 to 4, wherein a groove portion extending along the radial direction of the grommet body is provided on an outer surface of the sound insulating portion near the outer peripheral edge portion. 前記遮音部の外側面には、前記グロメット本体の径方向に沿って延びるリブが設けられている、請求項１から５のいずれか一項に記載のグロメット。 The grommet according to any one of claims 1 to 5, wherein a rib extending along the radial direction of the grommet body is provided on the outer surface of the sound insulating portion. 請求項１から６のいずれか一項に記載のグロメットを備える、ワイヤーハーネス。 A wire harness comprising the grommet according to any one of claims 1 to 6.
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