JP7125869B2

JP7125869B2 - hole plug

Info

Publication number: JP7125869B2
Application number: JP2018124717A
Authority: JP
Inventors: 絵梨南部
Original assignee: Piolax Inc
Current assignee: Piolax Inc
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2022-08-25
Anticipated expiration: 2038-06-29
Also published as: JP2020003040A

Description

本発明は、所定部材に設けられた孔を閉塞するための、ホールプラグに関する。 The present invention relates to a hole plug for closing a hole provided in a predetermined member.

例えば、自動車の車体パネルやリッドには、種々の目的に応じて、孔が形成されることがある。このような孔をそのままにしておくと、水密性や、見栄え等の点で問題が生じることがあるので、一般的にはホールプラグで閉塞されるようになっている。 For example, the body panels and lids of automobiles are sometimes formed with holes for various purposes. If such a hole is left as it is, problems may occur in terms of watertightness, appearance, etc., so it is generally closed with a hole plug.

従来のこの種のホールプラグとして、下記特許文献１には、パネルの孔に挿入される挿入部を備え、その挿入部には、パネル表面に圧接する環状の表側鍔部と、パネル裏面に圧接する環状の裏側鍔部とを一体形成してなる、プラグが記載されている。前記挿入部は、孔の内周縁に接する周壁部を有しており、この周壁部の上端から前記表側鍔部が一体形成されている。この表側鍔部は、周壁部上端から外径方向に向けて広がる部分と、その先端から斜め下方に向けて傘状に延びる部分とを有している。なお、表側鍔部は、その先端から基端に至るまで一定肉厚で形成されている。そして、パネルの孔に挿入部が挿入されると、孔の裏側に裏側鍔部が係合すると共に、孔の表側に表側鍔部の先端が圧接することで、孔にプラグが装着される。 As a conventional hole plug of this kind, the following Patent Document 1 discloses an insertion portion that is inserted into a hole in a panel. A plug is described which is integrally formed with an annular backside collar portion. The insertion portion has a peripheral wall portion that contacts the inner peripheral edge of the hole, and the front side flange portion is integrally formed from the upper end of the peripheral wall portion. The front flange has a portion that extends radially outward from the upper end of the peripheral wall portion and an umbrella-like portion that extends obliquely downward from the tip. In addition, the front-side flange portion is formed with a constant thickness from the tip to the base end. Then, when the insertion portion is inserted into the hole of the panel, the back side flange engages with the back side of the hole, and the tip of the front side flange is pressed against the front side of the hole, whereby the plug is attached to the hole.

特開２００８－５１３１４号公報JP 2008-51314 A

上記特許文献１のプラグは、孔への装着時に、孔の表側に表側鍔部の先端が圧接して、表側鍔部が撓み変形するようになっているが、その際には、表側鍔部の裏面側における根本部分（周壁部上端との連結部分）に応力が集中する。そのため、プラグが夏場に用いられた場合や高温雰囲気となる環境下で用いられて、プラグに高熱が長期的に負荷された場合に、表側鍔部の根本部分がクリープ変形して、表側鍔部の先端の、孔周縁に対するシール性が不十分になるおそれがあった。 In the plug disclosed in Patent Document 1, when the plug is inserted into the hole, the tip of the front flange portion is pressed against the front side of the hole, and the front flange portion is flexibly deformed. Stress concentrates on the root portion (connection portion with the upper end of the peripheral wall portion) on the back side of the . Therefore, when the plug is used in the summer or in a high-temperature environment and the plug is subjected to high heat for a long period of time, creep deformation occurs at the base of the front side flange, resulting in creep deformation of the front side flange. There is a risk that the sealing performance of the tip of the hole with respect to the periphery of the hole will be insufficient.

したがって、本発明の目的は、高熱が長期的に負荷されても、シールフランジ部のクリープ変形を抑制して、シール性を維持することができる、ホールプラグを提供することにある。 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a hole plug capable of suppressing creep deformation of the seal flange portion and maintaining sealing performance even when high heat is applied for a long period of time.

上記目的を達成するため、本発明は、所定部材に設けられた孔を閉塞するためのホールプラグであって、前記孔に挿入される本体部と、前記孔の表側周縁に当接するシールフランジ部とを有しており、前記本体部は、閉塞部と、該閉塞部の周縁から、前記本体部の前記孔への挿入方向に延出する筒状の内側壁部と、該内側壁部の、前記挿入方向側の端部から外側に折り返されて、前記挿入方向とは逆方向に延出し、前記内側壁部を囲むように配置され、外周に前記孔に係合する係合部を有する筒状の外側壁部とを有し、前記シールフランジ部は、前記外側壁部の、前記挿入方向とは逆方向側の端部から外径方向に延出する第１フランジ部と、該第１フランジ部の先端に角度変化部を介して連設され、該第１フランジ部に対して前記挿入方向側に傾いて更に延出する第２フランジ部とを有し、前記角度変化部に、前記シールフランジ部の外面の法線方向における厚さが最も薄い薄肉部が設けられていることを特徴とする。 In order to achieve the above object, the present invention provides a hole plug for closing a hole provided in a predetermined member, comprising: a main body portion inserted into the hole; The main body has a closing portion, a cylindrical inner wall portion extending from the peripheral edge of the closing portion in the direction of insertion into the hole of the main body portion, and the inner wall portion of the inner wall portion. , which is folded outward from the end on the insertion direction side, extends in the opposite direction to the insertion direction, is disposed so as to surround the inner wall portion, and has an engaging portion on the outer periphery thereof for engaging the hole. The seal flange portion includes a first flange portion extending radially outward from an end portion of the outer wall portion on the side opposite to the insertion direction, and the first flange portion. a second flange portion connected to the tip of the first flange portion via an angle change portion and further extending while being inclined in the insertion direction with respect to the first flange portion; A thin portion having the smallest thickness in the normal direction of the outer surface of the seal flange portion is provided.

本発明によれば、シールフランジ部は、外側壁部の挿入方向とは逆方向側の端部から外径方向に延出する第１フランジ部と、第１フランジ部の先端に角度変化部を介して連設され、該第１フランジ部に対して挿入方向側に傾いて更に延出する第２フランジ部とを有し、角度変化部に、シールフランジ部の外面の法線方向における厚さが最も薄い薄肉部が設けられているので、孔の表側周縁に押圧されたときに、シールフランジ部は、角度変化部と第１フランジ部の基端側とでそれぞれ撓み変形し、撓み変形による応力を分散することができ、熱負荷が作用してもクリープ変形を抑制することができ、また、角度変化部から第２フランジ部の先端までの短い距離で、孔の表側周縁からの反力を受けることで、第２フランジ部先端にかかる荷重を増加させて、シール性能を良好に維持することができる。 According to the present invention, the seal flange portion includes the first flange portion extending in the outer diameter direction from the end portion of the outer wall portion on the side opposite to the insertion direction, and the angle changing portion at the tip of the first flange portion. and a second flange portion that is continuous with the first flange portion and further extends while being inclined in the insertion direction side with respect to the first flange portion. is provided with the thinnest portion, the seal flange portion is flexurally deformed at the angle change portion and the base end side of the first flange portion when pressed against the front side peripheral edge of the hole. stress can be dispersed, creep deformation can be suppressed even if a thermal load acts, and the reaction force from the front side peripheral edge of the hole can be reduced in a short distance from the angle change portion to the tip of the second flange portion. By receiving the load, the load applied to the tip of the second flange portion can be increased, and good sealing performance can be maintained.

本発明に係るホールプラグの一実施形態を示す斜視図である。1 is a perspective view showing one embodiment of a hole plug according to the present invention; FIG. （ａ）は同ホールプラグの拡大斜視図、（ｂ）は同ホールプラグの、（ａ）とは異なる方向から見た場合の拡大斜視図である。(a) is an enlarged perspective view of the same hole plug, and (b) is an enlarged perspective view of the same hole plug when viewed from a direction different from (a). 同ホールプラグの断面図である。It is a sectional view of the same hole plug. 同ホールプラグを孔に取付けた状態の斜視図である。It is a perspective view of the state where the same hole plug was attached to the hole. 同ホールプラグを孔に取付けた状態の、拡大断面図である。It is an expanded sectional view in the state where the same hole plug was attached to the hole. （ａ）はホールプラグの比較例１を示す拡大断面図、（ｂ）はホールプラグの比較例２を示す拡大断面図である。(a) is an enlarged sectional view showing Comparative Example 1 of the hole plug, (b) is an enlarged sectional view showing Comparative Example 2 of the hole plug. 実施例のホールプラグの、応力分布確認試験の結果を示す図である。It is a figure which shows the result of the stress distribution confirmation test of the hole plug of an Example. 比較例１のホールプラグの、応力分布確認試験の結果を示す図である。4 is a diagram showing the results of a stress distribution confirmation test of the hole plug of Comparative Example 1. FIG. 比較例２のホールプラグの、応力分布確認試験の結果を示す図である。FIG. 10 is a diagram showing the results of a stress distribution confirmation test of the hole plug of Comparative Example 2; 漏水性能確認試験の説明図である。It is explanatory drawing of a water leakage performance confirmation test.

以下、図面を参照して、本発明に係るホールプラグの一実施形態について説明する。 An embodiment of a hole plug according to the present invention will be described below with reference to the drawings.

図１に示すように、このホールプラグ１０は、例えば、自動車の車体パネル等の所定部材１に設けられた孔５を閉塞するために用いられる。この実施形態の場合、孔５は円形状をなしているが、矩形孔や、楕円形や小判状の長孔等であってもよい。なお、所定部材１としては、自動車の荷室のリッドや、トランクリッド、ドア、フェンダー等であってもよく、特に限定はされない。 As shown in FIG. 1, this hole plug 10 is used, for example, to block a hole 5 provided in a predetermined member 1 such as a body panel of an automobile. In the case of this embodiment, the hole 5 has a circular shape, but it may be a rectangular hole, an elliptical hole, an oval long hole, or the like. The predetermined member 1 may be a lid of a luggage compartment of an automobile, a trunk lid, a door, a fender, or the like, and is not particularly limited.

そして、図２及び図３に示すように、この実施形態におけるホールプラグ１０（以下、単に「プラグ１０」ともいう）は、前記孔５に挿入される本体部３０と、孔５の表側周縁に当接するシールフランジ部５０とを有している。 As shown in FIGS. 2 and 3, the hole plug 10 (hereinafter also simply referred to as "plug 10") in this embodiment includes a body portion 30 to be inserted into the hole 5, and a front peripheral edge of the hole 5. and an abutting seal flange portion 50 .

図３に示すように、前記本体部３０は、孔５を覆う形状をなす閉塞部３１と、この閉塞部３１の周縁から、本体部３０の孔５への挿入方向Ｆ（以下、単に「挿入方向Ｆ」ともいう）に延出する筒状の内側壁部３３と、この内側壁部３３の、前記挿入方向Ｆ側の端部３３ａから外側に折り返されて、前記挿入方向Ｆとは逆方向に延出し、内側壁部３３の外周を囲むように配置され、その外周に前記孔５に係合する係合部３９を有する、筒状の外側壁部３５とを有している。 As shown in FIG. 3 , the body portion 30 includes a closing portion 31 that covers the hole 5 and an insertion direction F (hereinafter simply referred to as “insertion A cylindrical inner wall portion 33 extending in the direction F) and an end portion 33a of the inner wall portion 33 on the side of the insertion direction F that is folded outward from the end portion 33a in the direction opposite to the insertion direction F. It has a tubular outer wall portion 35 which extends outward, is arranged so as to surround the outer periphery of the inner wall portion 33 , and has an engaging portion 39 which engages with the hole 5 on the outer periphery thereof.

この実施形態では、前記閉塞部３１は円板状をなしており、その周縁から円筒状をなした内側壁部３３が、前記挿入方向Ｆ側へ向けて延出している。この内側壁部３３の、挿入方向Ｆ側の端部３３ａから、プラグ１０の外径方向に向けて折返し部３７が延出しており、この折返し部３７を介して、円筒状をなした外側壁部３５が、内側壁部３３の径方向外側に同心状に離間して、前記挿入方向Ｆとは逆方向に向けて延出している。なお、内側壁部３３と外側壁部３５との間には、閉塞部３１側が開口した環状の溝部４１が形成されており、これによって外側壁部３５が撓み変形可能となっている。 In this embodiment, the closing portion 31 is disc-shaped, and a cylindrical inner wall portion 33 extends from the peripheral edge of the closing portion 31 toward the insertion direction F side. A folded portion 37 extends radially outward from the plug 10 from an end portion 33a of the inner wall portion 33 on the insertion direction F side. A portion 35 is concentrically spaced radially outward of the inner wall portion 33 and extends in a direction opposite to the insertion direction F. As shown in FIG. Between the inner wall portion 33 and the outer wall portion 35, an annular groove portion 41 is formed with an opening toward the blocking portion 31 side, thereby allowing the outer wall portion 35 to bend and deform.

また、図３に示すように、外側壁部３５の、前記挿入方向Ｆ側の端部３５ａ側の外面は、前記折返し部３７に向けて次第に縮径するテーパ面４３をなしており、本体部３０を孔５へ挿入しやすくなっている。 As shown in FIG. 3, the outer surface of the outer wall portion 35 on the side of the end portion 35a in the insertion direction F forms a tapered surface 43 whose diameter gradually decreases toward the folded portion 37. 30 can be easily inserted into the hole 5.

更に、上記外側壁部３５のテーパ面４３の頂部に、環状をなした前記係合部３９が設けられている（図２（ｂ）参照）。図５に示すように、この係合部３９が、所定部材１に形成した孔５の裏側周縁に係合するようになっている。ただし、係合部としては、例えば、外側壁部３５の外周に沿って複数設けられた、突起状をなしていてもよく、孔５の裏側周縁に係合可能であればよい。 Further, the annular engaging portion 39 is provided at the top of the tapered surface 43 of the outer wall portion 35 (see FIG. 2(b)). As shown in FIG. 5, this engaging portion 39 engages with the rear peripheral edge of the hole 5 formed in the predetermined member 1. As shown in FIG. However, as the engaging portion, for example, a plurality of protrusions provided along the outer circumference of the outer wall portion 35 may be formed as long as they can be engaged with the rear peripheral edge of the hole 5 .

そして、図３に示すように、前記シールフランジ部５０（以下、単に「フランジ部５０」ともいう）は、外側壁部３５の、前記挿入方向Ｆとは逆方向側の端部３５ｂから外径方向に延出する第１フランジ部５１と、この第１フランジ部５１の先端５１ｂに角度変化部５５を介して連設され、該第１フランジ部５１に対して前記挿入方向Ｆ側に傾いて更に延出する第２フランジ部５３とを有している。 As shown in FIG. 3, the seal flange portion 50 (hereinafter also simply referred to as the “flange portion 50”) extends from the end portion 35b of the outer wall portion 35 on the side opposite to the insertion direction F to the outer diameter. a first flange portion 51 extending in the direction of insertion, and a first flange portion 51 connected to a tip end 51b of the first flange portion 51 via an angle changing portion 55, and inclined toward the insertion direction F side with respect to the first flange portion 51; It has a second flange portion 53 that further extends.

前記角度変化部５５は、第１フランジ部５１と第２フランジ部５３との間に設けられて、本体部３０の軸心Ｃに対する第１フランジ部５１又は第２フランジ部５３の角度を変化させるものである。そして、この角度変化部５５には、フランジ部５０の外面の法線方向（すなわち、フランジ部５０の外面における接線Ｓに対して、直交する法線Ｈに沿った方向を意味する）における厚さが最も薄い薄肉部５７が設けられている。 The angle changing portion 55 is provided between the first flange portion 51 and the second flange portion 53, and changes the angle of the first flange portion 51 or the second flange portion 53 with respect to the axis C of the body portion 30. It is. The angle change portion 55 has a thickness in the normal direction of the outer surface of the flange portion 50 (that is, the direction along the normal line H perpendicular to the tangent line S on the outer surface of the flange portion 50). A thin portion 57 is provided where the thickness is the thinnest.

なお、フランジ部５０の「外面」とは、フランジ部５０の内面とは反対側であって、所定部材１に形成した孔５の表側から離反する側の面を意味する（第１フランジ部５１及び第２フランジ部５３においても同様）。一方、フランジ部５０の「内面」とは、所定部材１に形成した孔５の表側に対向する側（孔５の表側に近接する側）の面を意味する（第１フランジ部５１及び第２フランジ部５３においても同様）。 The “outer surface” of the flange portion 50 means the surface opposite to the inner surface of the flange portion 50 and away from the front side of the hole 5 formed in the predetermined member 1 (the first flange portion 51 and the second flange portion 53 as well). On the other hand, the "inner surface" of the flange portion 50 means the surface on the side facing the front side of the hole 5 formed in the predetermined member 1 (the side close to the front side of the hole 5) (the first flange portion 51 and the second flange portion 51). The same applies to the flange portion 53).

また、この実施形態におけるフランジ部５０は、第１フランジ部５１が、本体部３０の外側壁部３５の、前記挿入方向Ｆとは逆方向側の端部３５ｂから外径方向に向けて次第に肉薄となって角度変化部５５に至り、第２フランジ部５３は、角度変化部５５から外径方向に向けて次第に肉厚となるように延出した構造となっている。 In addition, the first flange portion 51 of the flange portion 50 in this embodiment gradually becomes thinner toward the outer diameter direction from the end portion 35b of the outer wall portion 35 of the body portion 30 on the side opposite to the insertion direction F. It reaches the angle change portion 55, and the second flange portion 53 has a structure extending from the angle change portion 55 toward the outer diameter direction so as to gradually increase in thickness.

具体的に説明すると、この実施形態における第１フランジ部５１は、所定厚さの肉厚形状をなした基端５１ａが、外側壁部３５の、前記挿入方向Ｆとは逆方向側の端部３５ｂに連結されており、同端部３５ｂからフランジ部５０の外径方向に向けて次第に肉薄となるように延びて、その延出方向の先端５１ｂが、角度変化部５５の径方向内側部分に至るように形成されている。 Specifically, the first flange portion 51 in this embodiment has a base end 51a having a thick shape with a predetermined thickness, and the end portion of the outer wall portion 35 on the side opposite to the insertion direction F. 35b, and extends from the same end portion 35b toward the outer diameter direction of the flange portion 50 so as to become gradually thinner. formed to reach.

また、この第１フランジ部５１は、本体部３０の軸心Ｃに対して鋭角をなすように、前記挿入方向Ｆ側に傾斜して延出している。具体的に説明すると、第１フランジ部５１の、外面５９の法線Ｈ方向に沿った厚さ方向中央の位置において、前記基端５１ａと前記先端５１ｂとを結ぶ第１フランジ部５１の延出方向Ｌが、本体部３０の軸心Ｃに対して鋭角をなすように、前記挿入方向Ｆ側に傾斜した形状となっている。なお、本体部３０の軸心Ｃとは、閉塞部３１の中心を通り、かつ、内側壁部３３及び外側壁部３５の軸心を通る方向を意味する。 The first flange portion 51 extends obliquely in the insertion direction F side so as to form an acute angle with respect to the axis C of the main body portion 30 . More specifically, the first flange portion 51 extends from the base end 51a to the tip end 51b at the center in the thickness direction of the first flange portion 51 along the direction of the normal line H of the outer surface 59. The shape is inclined toward the insertion direction F so that the direction L forms an acute angle with respect to the axis C of the main body portion 30 . The axis C of the body portion 30 means a direction passing through the center of the closing portion 31 and passing through the axes of the inner wall portion 33 and the outer wall portion 35 .

この実施形態では、主として第１フランジ部５１の外面５９が、本体部３０の軸心Ｃに対して、前記挿入方向Ｆ側に傾斜した形状をなしており、それによって、第１フランジ部５１全体として、本体部３０の軸心Ｃに対して鋭角をなすように、前記挿入方向Ｆ側に傾斜している。 In this embodiment, mainly the outer surface 59 of the first flange portion 51 has a shape inclined in the insertion direction F side with respect to the axis C of the main body portion 30, so that the first flange portion 51 as a whole , so as to form an acute angle with respect to the axis C of the main body portion 30, toward the insertion direction F side.

一方、前記第２フランジ部５３は、前記角度変化部５５の径方向外側部分から、肉薄の基端５３ａが延びており、フランジ部５０の外径方向に向けて次第に肉厚となるように延出している。また、第２フランジ部５３は、その外面６３が本体部３０の軸心Ｃに対して角度θ２で傾斜して延出し、内面６５が本体部３０の軸心Ｃに対して角度θ３で傾斜して延出しており、内面６５側の角度θ３の方が外面６３側の角度θ２よりも小さくなるように設けられている。 On the other hand, the second flange portion 53 has a thin proximal end 53a extending from the radially outer portion of the angle changing portion 55, and gradually increases in thickness in the radially outer direction of the flange portion 50. out. The second flange portion 53 has an outer surface 63 extending at an angle of θ2 with respect to the axis C of the body portion 30, and an inner surface 65 with an angle θ3 with respect to the axis C of the body portion 30. and the angle θ3 on the inner surface 65 side is smaller than the angle θ2 on the outer surface 63 side.

更に、第２フランジ部５３の肉厚形状をなした延出方向先端であって、その内面６５側における先端部６７は、所定曲率で形成されたＲ状をなしている。このＲ状をなした先端部６７は、図５に示すように、孔５に本体部３０を挿入して、係合部３９が孔５の裏側周縁に係合した状態で、孔５の表側周縁に当接するように構成されている。また、図３に示すように、先端部６７の径方向外側部分は、本体部３０の軸心Ｃに対して直交する平坦面６７ａをなしている。更に、第２フランジ部５３の延出方向最先端の端面５３ｂは、前記平坦面６７ａに対して直角に立ち上がる面となっている。 Further, a tip portion 67 on the inner surface 65 side, which is the thick-walled extension direction tip of the second flange portion 53, has an R shape formed with a predetermined curvature. As shown in FIG. 5, the R-shaped tip portion 67 is inserted into the hole 5 and the engaging portion 39 is engaged with the rear peripheral edge of the hole 5. It is configured to abut the peripheral edge. Further, as shown in FIG. 3 , the radially outer portion of the distal end portion 67 forms a flat surface 67 a perpendicular to the axis C of the main body portion 30 . Further, the end surface 53b of the second flange portion 53, which is the most distal end in the extending direction, is a surface that rises at right angles to the flat surface 67a.

また、上記説明において、第２フランジ部５３が、「第１フランジ部５１に対して挿入方向Ｆ側に傾く」とは、第２フランジ部５３の外面６３と、第１フランジ部５１の外面５９とが、同一平面上又は同一曲面上に配置されないように、第２フランジ部５３の外面６３が、角度変化部５５を介して、第１フランジ部５１の外面５９に対して、前記挿入方向Ｆ側に傾いて配置されることを意味する。 Further, in the above description, the phrase “the second flange portion 53 is inclined toward the insertion direction F side with respect to the first flange portion 51” means that the outer surface 63 of the second flange portion 53 and the outer surface 59 of the first flange portion 51 The outer surface 63 of the second flange portion 53 is aligned with the outer surface 59 of the first flange portion 51 via the angle change portion 55 in the insertion direction F It means that it is placed tilted to the side.

更に、この実施形態における前記角度変化部５５には、フランジ部５０の外面側及び内面側に、曲面状に丸みを帯びた形状をなす、曲面部６９，７１がそれぞれ設けられている。図３に示すように、この実施形態では、内面側の曲面部７１の、本体部３０の軸心Ｃを通る縦断面における曲線長さＫ２が、外面側の曲面部６９の、本体部３０の軸心Ｃを通る縦断面における曲面長さＫ１よりも、長くなるように形成されている。 Further, the angle changing portion 55 in this embodiment is provided with curved surface portions 69 and 71 having rounded shapes on the outer surface side and the inner surface side of the flange portion 50, respectively. As shown in FIG. 3, in this embodiment, the curved length K2 of the curved surface portion 71 on the inner surface side in a longitudinal section passing through the axis C of the main body portion 30 is the same as that of the curved surface portion 69 on the outer surface side of the main body portion 30. It is formed to be longer than the curved surface length K1 in the longitudinal section passing through the axis C.

また、上記角度変化部５５に設けられた前記薄肉部５７は、図３に示すように、外面側の曲面部６９及び内面側の曲面部７１の、曲線長さＫ１，Ｋ２の長さ方向のほぼ中央に位置するように設けられている。なお、薄肉部５７の厚さＴ１は、フランジ部５０の最大厚さＴ２（この実施形態では、第２フランジ部５３の先端側であって、外面６３の法線Ｈ方向における最も肉厚の部分の厚さを意味する。ただし、薄肉部としては、角度変化部５５に設けられていればよく、形成位置等は特に限定されない。 As shown in FIG. 3, the thin portion 57 provided in the angle change portion 55 is formed by extending the curved lengths K1 and K2 of the curved surface portion 69 on the outer surface side and the curved surface portion 71 on the inner surface side in the length direction. It is provided so as to be positioned approximately in the center. Note that the thickness T1 of the thin portion 57 is equal to the maximum thickness T2 of the flange portion 50 (in this embodiment, the tip side of the second flange portion 53 and the thickest portion in the normal H direction of the outer surface 63). However, the thin portion may be provided at the angle change portion 55, and the formation position and the like are not particularly limited.

上記構造をなしたプラグ１０は、図５に示すように、所定部材１に形成した孔５に取付けすべく、本体部３０を孔５に挿入して、係合部３９が孔５の裏側周縁に係合し、フランジ部５０を構成する第２フランジ部５３の先端部６７が、孔５の表側周縁に当接した状態となると、角度変化部５５の薄肉部５７を介して、フランジ部５０が撓み変形するようになっている。具体的には、フランジ部５０の第２フランジ部５３の先端部６７が、孔５の表側周縁に押圧されることで、角度変化部５５が薄肉部５７を中心にして撓み変形すると共に、撓み変形した角度変化部５５を介して、第１フランジ部５１が基端５１ａの内面側を中心として更に撓み変形する。このように、このフランジ部５０は、角度変化部５５及び第１フランジ部５１がそれぞれ撓み変形するようになっている。 As shown in FIG. 5, the plug 10 having the structure described above is attached to the hole 5 formed in the predetermined member 1 by inserting the main body portion 30 into the hole 5 and engaging the engaging portion 39 with the rear peripheral edge of the hole 5 . , and when the distal end portion 67 of the second flange portion 53 that constitutes the flange portion 50 comes into contact with the front-side peripheral edge of the hole 5 , the flange portion 50 is adapted to flex and deform. Specifically, when the distal end portion 67 of the second flange portion 53 of the flange portion 50 is pressed against the outer peripheral edge of the hole 5 , the angle changing portion 55 is flexurally deformed around the thin portion 57 , and the flexural deformation is Through the deformed angle changing portion 55, the first flange portion 51 is further flexurally deformed around the inner surface side of the proximal end 51a. In this manner, the flange portion 50 is configured such that the angle changing portion 55 and the first flange portion 51 are each flexurally deformed.

以上説明したプラグ１０は、例えば、ゴムや弾性エラストマー等の、弾性樹脂材料によって、一体形成されている。 The plug 10 described above is integrally formed of, for example, an elastic resin material such as rubber or elastic elastomer.

次に、上記構成からなるプラグ１０の使用方法及び作用効果について説明する。 Next, the usage method and effects of the plug 10 having the above configuration will be described.

すなわち、フランジ部５０の外周を把持して、図１や図３に示すように、所定部材１に設けた孔５の表側から、本体部３０の内側壁部３３の端部３３ａ側や外側壁部３５の端部３５ａ側を挿入して、同本体部３０を挿入方向Ｆ側に向けて押し込んでいく。すると、本体部３０がテーパ面４３によってガイドされながら、外側壁部３５や内側壁部３３が孔５に挿入されると共に、孔５の内周に係合部３９が押圧されて、溝部４１を介して外側壁部３５が孔内側に向けて撓んでいく。また、孔５の表側周縁にフランジ部５０の先端部６７が当接するため、孔５の表側周縁によって第２フランジ部５３が押圧されて、角度変化部５５の薄肉部５７や第１フランジ部５１の基端５１ａを介してフランジ部５０が撓み変形する。更にプラグ１０を押し込んで、孔５の裏側から係合部３９が抜け出ると、外側壁部３５が弾性復帰して、孔５の裏側周縁に係合部３９が係合すると共に、孔５の表側周縁に第２フランジ部５３の先端部６７が弾性的に当接して、係合部３９とフランジ部５０とで所定部材１が挟み込まれて、図４や図５に示すように、孔５を閉塞した状態で、孔５にプラグ１０を取付けることができる。 That is, by gripping the outer periphery of the flange portion 50, as shown in FIG. 1 and FIG. The end portion 35a side of the portion 35 is inserted, and the body portion 30 is pushed in toward the insertion direction F side. Then, while the main body portion 30 is guided by the tapered surface 43 , the outer wall portion 35 and the inner wall portion 33 are inserted into the hole 5 , and the engaging portion 39 is pressed against the inner periphery of the hole 5 to move the groove portion 41 . The outer wall portion 35 bends toward the inside of the hole through the hole. In addition, since the tip portion 67 of the flange portion 50 abuts against the front-side peripheral edge of the hole 5 , the second flange portion 53 is pressed by the front-side peripheral edge of the hole 5 , and the thin portion 57 of the angle changing portion 55 and the first flange portion 51 are pressed. The flange portion 50 is flexurally deformed through the proximal end 51a of the. When the plug 10 is further pushed in and the engaging portion 39 is pulled out from the back side of the hole 5, the outer wall portion 35 is elastically restored, and the engaging portion 39 is engaged with the peripheral edge of the back side of the hole 5, and the front side of the hole 5 is engaged. The distal end portion 67 of the second flange portion 53 elastically abuts against the peripheral edge, and the predetermined member 1 is sandwiched between the engaging portion 39 and the flange portion 50, thereby opening the hole 5 as shown in FIGS. A plug 10 can be attached to the hole 5 in the closed state.

そして、このプラグ１０においては、フランジ部５０は、外側壁部３５の、前記挿入方向Ｆとは逆方向側の端部３５ｂから外径方向に延出する第１フランジ部５１と、この第１フランジ部５１の先端５１ｂに角度変化部５５を介して連設され、該第１フランジ部５１に対して前記挿入方向Ｆ側に傾いて更に延出する第２フランジ部５３とを有しており、前記角度変化部５５に、フランジ部５０の外面の法線Ｈ方向における厚さが最も薄い薄肉部５７が設けられている。そのため、プラグ１０を孔５に挿入した状態で、フランジ部５０を構成する第２フランジ部５３の先端部６７が、孔５の表側周縁に押圧されたときに、図５に示すように、同フランジ部５０が、角度変化部５５と、第１フランジ部５１の基端側とで、それぞれ撓み変形する。 In the plug 10, the flange portion 50 includes a first flange portion 51 extending radially outwardly from an end portion 35b of the outer wall portion 35 opposite to the insertion direction F; It has a second flange portion 53 that is connected to the tip 51b of the flange portion 51 via an angle change portion 55 and further extends while being inclined in the insertion direction F side with respect to the first flange portion 51. A thin portion 57 having the smallest thickness in the normal H direction of the outer surface of the flange portion 50 is provided in the angle change portion 55 . Therefore, when the tip portion 67 of the second flange portion 53 that constitutes the flange portion 50 is pressed against the front side peripheral edge of the hole 5 with the plug 10 inserted into the hole 5, as shown in FIG. The flange portion 50 is flexurally deformed at the angle changing portion 55 and at the base end side of the first flange portion 51 .

ここでは、第２フランジ部５３の先端部６７が孔５の表側周縁に押圧されることで、同先端部６７に孔５の表側周縁からの反力が作用して、図５に示すように、第２フランジ部５３が押し上げられて、角度変化部５５に孔５の表側から離反する向きの曲げ応力Ｍが付与されるので、主として内面側の曲面部７１に引張り応力が作用して、角度変化部５５が薄肉部５７を中心として、略への字状をなすように撓み変形する。この場合、角度変化部５５には、薄肉部５７の内面側を中心として、その近傍に応力が負荷される。図７には、その際の応力分布状態が示されている（図７については後述する）。また、図７に示されるように、フランジ部５０は、その角度変化部５５の内面側から第２フランジ部５３の先端部６７までの間において、孔５の表側周縁からの反力を受けており、特に第２フランジ部５３の先端部６７側にかかる荷重が増加するようになっている。 Here, as the tip portion 67 of the second flange portion 53 is pressed against the front edge of the hole 5, a reaction force from the front edge of the hole 5 acts on the tip portion 67, and as shown in FIG. , the second flange portion 53 is pushed up, and the bending stress M in the direction away from the front side of the hole 5 is applied to the angle changing portion 55, so that the tensile stress acts mainly on the curved surface portion 71 on the inner surface side, and the angle changes. The changing portion 55 is flexurally deformed around the thin portion 57 so as to form a substantially inverted V shape. In this case, the stress is applied to the angle changing portion 55 around the inner surface side of the thin portion 57 as a center. FIG. 7 shows the stress distribution state at that time (FIG. 7 will be described later). Further, as shown in FIG. 7, the flange portion 50 receives a reaction force from the outer peripheral edge of the hole 5 in the area from the inner surface side of the angle changing portion 55 to the tip portion 67 of the second flange portion 53. In particular, the load applied to the tip portion 67 side of the second flange portion 53 increases.

上記の角度変化部５５の撓み変形と共に、孔５の表側周縁からの押圧力が、角度変化部５５を介して第１フランジ部５１に伝達されて、図５に示すように、第１フランジ部５１にも、角度変化部５５と同様に、孔５の表側から離反する向きの曲げ応力Ｍが付与されるので、同第１フランジ部５１が、基端５１ａの内面６１側を中心として押し上げられて、その外面側が凹むように湾曲しつつ、第１フランジ部５１が撓み変形する。この場合、第１フランジ部５１には、基端５１ａの内面６１側を中心として、その近傍に応力が負荷される（図７も併せて参照）。 Along with the flexural deformation of the angle changing portion 55, the pressing force from the front peripheral edge of the hole 5 is transmitted to the first flange portion 51 via the angle changing portion 55, and as shown in FIG. Since the bending stress M in the direction away from the front side of the hole 5 is applied to the 51 as well as the angle changing portion 55, the first flange portion 51 is pushed up centering on the inner surface 61 side of the proximal end 51a. Then, the first flange portion 51 is flexurally deformed while curving so that the outer surface side thereof is recessed. In this case, stress is applied to the first flange portion 51 centering on the inner surface 61 side of the proximal end 51a and the vicinity thereof (see also FIG. 7).

したがって、このプラグ１０においては、上述したように、フランジ部５０が孔５の表側周縁に押圧されたときに、同フランジ部５０が、角度変化部５５と、第１フランジ部５１の基端５１ａ側とで、それぞれ撓み変形するようになっているので、フランジ部５０の撓み変形による応力を、第１フランジ部５１の基端５１ａの内面６１側のみに集中させずに、角度変化部５５にも分散することができる。その結果、プラグ１０を取付けた自動車を夏場に用いた場合や、高温雰囲気となる環境下で用いられた場合等において、高温の熱負荷が作用しても、フランジ部５０のクリープ変形を抑制することができ、フランジ部５０の反力（弾発力）の低下やへたれを抑えることができ、また、上述したように、角度変化部５５から第２フランジ部５３の先端までの短い距離で、孔５の表側周縁からの反力を受けることで（図７の応力分布状態を参照）、第２フランジ部５３の先端部６７側にかかる荷重を増加させることができ、孔５の表側周縁に対するフランジ部５０のシール性能を良好に維持することができる。 Therefore, in this plug 10, as described above, when the flange portion 50 is pressed against the front-side peripheral edge of the hole 5, the flange portion 50 is aligned with the angle changing portion 55 and the base end 51a of the first flange portion 51. Since the stress caused by the bending deformation of the flange portion 50 is not concentrated only on the inner surface 61 side of the base end 51a of the first flange portion 51, it can be applied to the angle changing portion 55. can also be dispersed. As a result, creep deformation of the flange portion 50 is suppressed even if a high-temperature heat load is applied when the automobile equipped with the plug 10 is used in summer or in a high-temperature environment. It is possible to suppress the decrease in the reaction force (elastic force) of the flange portion 50 and the sagging. By receiving the reaction force from the front side periphery of the hole 5 (see the stress distribution state in FIG. 7), the load applied to the tip portion 67 side of the second flange portion 53 can be increased. Good sealing performance of the flange portion 50 can be maintained.

また、この実施形態においては、図３に示すように、第１フランジ部５１は、本体部３０の軸心Ｃに対して鋭角をなすように、前記挿入方向Ｆ側に傾斜して延出された構造となっている。そのため、第２フランジ部５３が、第１フランジ部５１に対して更に挿入方向Ｆ側に傾斜して延出することとなるので、第２フランジ部５３が孔５の表側周縁に押圧されたときの、第２フランジ部５３の反力をより高めることができ、孔５の表側周縁に対するフランジ部５０のシール性をより向上させることができる。 In this embodiment, as shown in FIG. 3, the first flange portion 51 extends obliquely in the insertion direction F side so as to form an acute angle with respect to the axis C of the body portion 30. structure. Therefore, since the second flange portion 53 extends with an inclination further toward the insertion direction F side with respect to the first flange portion 51 , when the second flange portion 53 is pressed against the outer peripheral edge of the hole 5 , , the reaction force of the second flange portion 53 can be further increased, and the sealing performance of the flange portion 50 against the front side peripheral edge of the hole 5 can be further improved.

更にこの実施形態においては、図３に示すように、フランジ部５０は、第１フランジ部５１が、本体部３０の外側壁部３５の、前記挿入方向Ｆとは逆方向側の端部３５ｂから外径方向に向けて次第に肉薄となって角度変化部５５に至り、第２フランジ部５３は、角度変化部５５から外径方向に向けて次第に肉厚となるように延出している。そのため、第２フランジ部５３が孔５の表側周縁に押圧されたときに、その押圧力を、角度変化部５５の薄肉部５７を中心にして、フランジ部５０の径方向に分散しやすくなるので、熱負荷が作用した際の、フランジ部５０のクリープ変形をより効果的に抑制することができ、孔５の表側周縁に対するフランジ部５０のシール性能をより良好に維持することができる。 Furthermore, in this embodiment, as shown in FIG. It gradually becomes thinner toward the outer diameter direction and reaches the angle change portion 55, and the second flange portion 53 extends from the angle change portion 55 so as to become gradually thicker toward the outer diameter direction. Therefore, when the second flange portion 53 is pressed against the outer peripheral edge of the hole 5, the pressing force can be easily dispersed in the radial direction of the flange portion 50 with the thin portion 57 of the angle changing portion 55 as the center. , the creep deformation of the flange portion 50 when a heat load is applied can be more effectively suppressed, and the sealing performance of the flange portion 50 against the outer peripheral edge of the hole 5 can be maintained better.

また、この実施形態においては、図３に示すように、フランジ部５０を構成する角度変化部５５の外面及び内面に曲面部６９，７１がそれぞれ設けられており、内面側の曲面部７１の、本体部３０の軸心Ｃを通る縦断面における曲線長さＫ２が、外面側の曲面部６９の、本体部３０の軸心Ｃを通る縦断面における曲面長さＫ１よりも、長くなるように形成されている。そのため、孔５に本体部３０を挿入して、フランジ部５０の第２フランジ部５３が孔５の表側周縁に当接して、フランジ部５０が撓み変形する際に、角度変化部５５に設けた薄肉部５７を中心として、角度変化部５５にかかる応力をより効果的に分散させるとともに撓みやすくすることができ、角度変化部５５の内面側にかかる応力をより広い範囲で緩和することができる。角度変化部５５の外面側の曲面部６９の方が内面側の曲面部７１よりも長い場合には、内面側の曲面部７１に応力が集中しやすくなって、角度変化部５５を撓み変形させにくくなり、応力の分散が図りにくくなる傾向がある。 Further, in this embodiment, as shown in FIG. 3, curved surface portions 69 and 71 are provided on the outer surface and the inner surface of the angle changing portion 55 constituting the flange portion 50, respectively. A curved length K2 in a longitudinal section passing through the axis C of the main body 30 is formed to be longer than a curved surface length K1 in a longitudinal section passing through the axial center C of the main body 30 of the curved surface portion 69 on the outer surface side. It is Therefore, when the main body portion 30 is inserted into the hole 5 and the second flange portion 53 of the flange portion 50 abuts against the front side peripheral edge of the hole 5 and the flange portion 50 is flexurally deformed, the angle change portion 55 is provided with a Centering on the thin portion 57, the stress applied to the angle changing portion 55 can be more effectively dispersed and can be easily bent, and the stress applied to the inner surface side of the angle changing portion 55 can be relieved in a wider range. If the curved surface portion 69 on the outer surface side of the angle changing portion 55 is longer than the curved surface portion 71 on the inner surface side, stress tends to concentrate on the curved surface portion 71 on the inner surface side, causing the angle changing portion 55 to bend and deform. It tends to be difficult to disperse the stress.

更に、この実施形態においては、図３に示すように、第２フランジ部５３の内面６５の、本体部３０の軸心Ｃに対する角度θ３が、第２フランジ部５３の外面６３の、本体部３０の軸心Ｃに対する角度θ２よりも小さくなるように設けられており、また、第２フランジ部５３の内面６５側における先端部６７がＲ状をなし、この先端部６７が孔５の表側周縁に当接するように構成されている。そのため、第２フランジ部５３を、先端部６７側が肉厚となる形状にしやすくして、孔５の表側周縁に対する第２フランジ部５３の面圧を高めることができると共に、孔５を設けた所定部材１の板厚に柔軟に対応して、Ｒ状の先端部６７を孔５の表側周縁に密接状態で当接させることができるため、孔５の表側周縁に対するフランジ部５０のシール性を更に高めることができる。また、第２フランジ部５３の内面６５側における先端部６７がＲ状をなし、この先端部６７が孔５の表側周縁に当接するため、ホールプラグ成型時にバリが生じやすい、第２フランジ部５３の外面６３側の先端部（端面５３ｂの、孔５から離れたエッジ部分等）が、孔５の表側周縁に当接しないため、バリの影響によるフランジ部５０のシール性低下を抑制することができる。 Furthermore, in this embodiment, as shown in FIG. is provided so as to be smaller than the angle θ2 with respect to the axis C of the second flange portion 53, and the tip portion 67 on the inner surface 65 side of the second flange portion 53 has an R shape, and the tip portion 67 is located on the front side peripheral edge of the hole 5. configured to abut. Therefore, the second flange portion 53 can be easily formed into a shape that is thicker on the tip portion 67 side, so that the surface pressure of the second flange portion 53 against the front side peripheral edge of the hole 5 can be increased. Since the R-shaped tip portion 67 can flexibly correspond to the plate thickness of the member 1 and can be brought into close contact with the front side peripheral edge of the hole 5, the sealing performance of the flange portion 50 against the front side peripheral edge of the hole 5 is further improved. can be enhanced. In addition, since the tip portion 67 on the inner surface 65 side of the second flange portion 53 has an R shape, and the tip portion 67 abuts on the front side peripheral edge of the hole 5, burrs are likely to occur when molding the hole plug. Since the tip portion on the outer surface 63 side (such as the edge portion of the end surface 53b away from the hole 5) does not contact the front side peripheral edge of the hole 5, it is possible to suppress the deterioration of the sealing performance of the flange portion 50 due to the influence of burrs. can.

（応力分布確認試験）
各種のホールプラグを所定部材の孔に取付けた場合に、シールフランジ部に、応力がどのように付与されているかを測定した。 (Stress distribution confirmation test)
It was measured how stress was applied to the seal flange portion when various hole plugs were attached to the holes of the predetermined members.

（実施例の作製）
図１～５に示すホールプラグと同様の形状をなす、実施例のホールプラグを作製した。そのシールフランジ部５０の薄肉部５７の厚さＴ１は０．５１ｍｍであり、同シールフランジ部５０の最大厚さＴ２は１．３４ｍｍである。 (Production of Examples)
Example hole plugs having the same shape as the hole plugs shown in FIGS. 1 to 5 were produced. The thickness T1 of the thin portion 57 of the seal flange portion 50 is 0.51 mm, and the maximum thickness T2 of the seal flange portion 50 is 1.34 mm.

（比較例１の作製）
図６（ａ）に示すように、実施例のホールプラグとはシールフランジ部の形状が異なり、それ以外は同様の構造をなした、比較例１のホールプラグを作製した。シールフランジ部１００は、外側壁部３５の端部３５ｂから斜め外方に向けて傘状をなすように、一定の厚さＴで延出しており、その厚さＴは０．８０ｍｍである。 (Production of Comparative Example 1)
As shown in FIG. 6(a), a hole plug of Comparative Example 1 was produced, which had the same structure as the hole plug of Example except for the shape of the seal flange portion. The seal flange portion 100 extends obliquely outward from the end portion 35b of the outer wall portion 35 to form an umbrella shape with a constant thickness T of 0.80 mm.

（比較例２の作製）
図６（ｂ）に示すように、実施例のホールプラグとはシールフランジ部の形状が異なり、それ以外は同様の構造をなした、比較例２のホールプラグを作製した。シールフランジ部２００は、外側壁部３５の端部３５ｂから斜め外方に向けて第１フランジ部２１０が延出すると共に、角度変化部２２０を介して、その先端から更に第２フランジ部２３０が斜め外方に延出しているが、実施例のホールプラグとは異なり、角度変化部２２０に薄肉部がない構造となっている。また、第１フランジ部２１０、角度変化部２２０、第２フランジ部２３０は、同一の厚さＴで形成されており、その厚さＴは１．００ｍｍである。 (Production of Comparative Example 2)
As shown in FIG. 6(b), a hole plug of Comparative Example 2 was fabricated, which had the same structure as the hole plug of Example except for the shape of the seal flange portion. In the seal flange portion 200, a first flange portion 210 extends obliquely outward from an end portion 35b of the outer wall portion 35, and a second flange portion 230 further extends from the tip thereof via an angle change portion 220. Although it extends obliquely outward, unlike the hole plug of the embodiment, the angle change portion 220 has no thin portion. Also, the first flange portion 210, the angle change portion 220, and the second flange portion 230 are formed with the same thickness T, which is 1.00 mm.

（測定方法及びその測定結果）
実施例及び比較例１，２を所定部材の孔に取付けた状態で、８０℃の高温雰囲気下で２００時間の熱負荷を与え、その場合における各シールフランジ部への応力分布について、周知の解析ソフトを用いて測定した。なお、所定部材の板厚は１．８ｍｍであり、孔の内径は２９．８ｍｍである。図７には実施例の結果が示されており、図８には比較例１の結果が示されており、図９には比較例２の結果が示されている。なお、各図７～９において、「ＭＸ」とは、シールフランジ部に付与される応力の最大値を意味しており、各図の左上欄の「ＳＭＸ」にその具体的な数値が記載されている。 (Measurement method and its measurement result)
A heat load is applied for 200 hours in a high-temperature atmosphere of 80° C. with Examples and Comparative Examples 1 and 2 attached to holes in a predetermined member, and the stress distribution to each seal flange portion in that case is analyzed by a well-known analysis. Measured using software. The plate thickness of the predetermined member is 1.8 mm, and the inner diameter of the hole is 29.8 mm. FIG. 7 shows the results of Example, FIG. 8 shows the results of Comparative Example 1, and FIG. 9 shows the results of Comparative Example 2. As shown in FIG. In each of FIGS. 7 to 9, "MX" means the maximum value of stress applied to the seal flange portion, and the specific numerical value is described in "SMX" in the upper left column of each figure. ing.

図８に示す比較例１では、シールフランジ部の内面側全体に亘って応力が付与されており、特に、その基端部内面側に最大応力（ＳＭＸ：１１．３２４）が付与されている。これは、比較例１のホールプラグを孔に挿入して、シールフランジ部１００の先端部が、孔の表側周縁から押圧力を受けると、シールフランジ部１００の全体が撓み変形するためであると考えられる。 In Comparative Example 1 shown in FIG. 8, stress is applied to the entire inner surface of the seal flange portion, and in particular, the maximum stress (SMX: 11.324) is applied to the inner surface of the base end portion. This is because when the hole plug of Comparative Example 1 is inserted into the hole and the front end portion of the seal flange portion 100 receives a pressing force from the front side peripheral edge of the hole, the entire seal flange portion 100 is flexurally deformed. Conceivable.

一方、図９に示す比較例２でも、シールフランジ部の内面側全体に亘って応力が付与され、特に、その基端部内面側に最大応力（ＳＭＸ：１４．５４８）が付与されている。これは、シールフランジ部２００には、第１フランジ部２１０と第２フランジ部２３０とが存在するが、角度変化部２２０に薄肉部が存在せず、角度変化部２２０が撓み変形しにくいため、第２フランジ部２３０の先端部が孔の表側周縁から押圧力を受けると、その押圧力が、第２フランジ部２３０及び角度変化部２２０を介して第１フランジ部２１０側へと伝わって、シールフランジ部２００全体が大きく撓み変形するため、比較例１と同様に、シールフランジ部２００の基端部内面側に応力が集中しやすいものと考えられる。 On the other hand, in Comparative Example 2 shown in FIG. 9 as well, stress is applied to the entire inner surface of the seal flange portion, and in particular, the maximum stress (SMX: 14.548) is applied to the inner surface of the base end portion. This is because although the seal flange portion 200 has the first flange portion 210 and the second flange portion 230, the angle change portion 220 does not have a thin portion, and the angle change portion 220 is less likely to bend and deform. When the tip portion of the second flange portion 230 receives a pressing force from the front edge of the hole, the pressing force is transmitted to the first flange portion 210 side via the second flange portion 230 and the angle change portion 220, thereby sealing the seal. Since the flange portion 200 as a whole undergoes a large bending deformation, stress is likely to concentrate on the inner surface side of the proximal end portion of the seal flange portion 200 as in the first comparative example.

上記の比較例１，２に対して、実施例においては、角度変化部５５が薄肉部５７によって撓み変形しやすいため、第２フランジ部５３の先端部６７が、孔５の表側周縁からの押圧力を受けた場合に、薄肉部５７を介して角度変化部５５が大きく撓み変形すると共に、第１フランジ部５１も、その外面側が凹むように湾曲しつつ大きく撓み変形するので、応力を分散を分散しやすくすることができる。その結果、第１フランジ部５１の基端５１ａの内面側に付与される最大応力（ＳＭＸ８．５１５）が、比較例１，２に比べて低くなり、第１フランジ部５１の基端５１ａの内面側での応力集中を緩和できることが分かる。 In contrast to Comparative Examples 1 and 2 described above, in the embodiment, the angle changing portion 55 is easily deformed by the thin portion 57 , so that the distal end portion 67 of the second flange portion 53 is pushed from the outer peripheral edge of the hole 5 . When the pressure is applied, the angle changing portion 55 is largely flexurally deformed via the thin portion 57, and the first flange portion 51 is also largely flexurally deformed while curving so as to dent the outer surface side thereof, thereby dispersing the stress. Dispersion can be facilitated. As a result, the maximum stress (SMX 8.515) applied to the inner surface side of the proximal end 51a of the first flange portion 51 is lower than in Comparative Examples 1 and 2, and the inner surface of the proximal end 51a of the first flange portion 51 It can be seen that the stress concentration on the side can be relaxed.

（漏水性能確認試験）
図１０に示すように、底部パネル３１０に孔３２０を形成した水槽３００内に水を充填しておき、前記孔３２０に実施例及び比較例１のホールプラグを、シールフランジ部が下向きとなるように取付けた。水槽３００に充填される水の、底部パネル３１０からの高さは１００ｍｍである。また、水槽３００の底部パネル３１０の板厚、及び、孔３２０の内径は、下記表に示すものとなっている。そして、８０℃の高温雰囲気下で２００時間の熱負荷を与え、実施例及び比較例１のホールプラグを、上記状態で１０分間保持して、孔３２０からの水の漏れがあるかどうかについて測定した。その結果を下記表１に示す。

(Water leakage performance confirmation test)
As shown in FIG. 10, a water tank 300 having a hole 320 formed in a bottom panel 310 is filled with water, and the hole plug of Example and Comparative Example 1 is inserted into the hole 320 so that the seal flange faces downward. mounted on. The height from the bottom panel 310 of the water filled in the water tank 300 is 100 mm. The thickness of the bottom panel 310 of the water tank 300 and the inner diameter of the hole 320 are shown in the table below. Then, a heat load is applied for 200 hours in a high temperature atmosphere of 80° C., and the hole plugs of Example and Comparative Example 1 are held in the above state for 10 minutes, and whether or not there is water leakage from the hole 320 is measured. did. The results are shown in Table 1 below.

その結果、比較例１のホールプラグでは、パネル厚さや孔の内径によらず、いずれの条件においても水漏れが発生したのに対し、実施例のホールプラグでは、いずれの条件でも水漏れが発生しなかった。そのため、シールフランジ部は、孔に対して十分なシール性を得られることが理解できる。 As a result, in the hole plug of Comparative Example 1, water leakage occurred under all conditions regardless of the panel thickness and the inner diameter of the hole, whereas in the hole plug of Example, water leakage occurred under all conditions. didn't. Therefore, it can be understood that the seal flange portion can obtain sufficient sealing performance with respect to the hole.

なお、本発明は、上述した実施形態に限定されるものではなく、本発明の要旨の範囲内で、各種の変形実施形態が可能であり、そのような実施形態も本発明の範囲に含まれる。 The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the present invention, and such embodiments are also included in the scope of the present invention. .

１所定部材
５孔
１０ホールプラグ（プラグ）
３０本体部
３１閉塞部
３３内側壁部
３５外側壁部
３９係合部
５０シールフランジ部（フランジ部）
５１第１フランジ部
５３第２フランジ部
５５角度変化部
５７薄肉部
６７先端部
６９，７１曲面部 1 predetermined member 5 hole 10 hole plug (plug)
30 body portion 31 closing portion 33 inner wall portion 35 outer wall portion 39 engagement portion 50 seal flange portion (flange portion)
51 First flange portion 53 Second flange portion 55 Angle change portion 57 Thin portion 67 Tip portions 69, 71 Curved surface portion

Claims

A hole plug for closing a hole provided in a predetermined member,
It has a main body portion inserted into the hole and a seal flange portion that abuts on the front side peripheral edge of the hole,
The body portion includes a closing portion,
a cylindrical inner wall portion extending from the peripheral edge of the closing portion in a direction of insertion into the hole of the main body portion;
The inner wall portion is folded outward from the end on the insertion direction side, extends in a direction opposite to the insertion direction, is disposed so as to surround the inner wall portion, and is engaged with the hole on the outer periphery. a cylindrical outer wall portion having an engaging portion;
The seal flange portion includes a first flange portion extending radially outward from an end portion of the outer wall portion on a side opposite to the insertion direction;
a second flange portion connected to the tip of the first flange portion via an angle changing portion and further extending while being inclined in the insertion direction with respect to the first flange portion;
The angle change portion is provided with a thin portion having the smallest thickness in the normal direction of the outer surface of the seal flange portion,
The hole plug, wherein the first flange portion extends obliquely in the insertion direction so as to form an acute angle with respect to the axis of the body portion.

A hole plug for closing a hole provided in a predetermined member,
It has a main body portion inserted into the hole and a seal flange portion that abuts on the front side peripheral edge of the hole,
The body portion includes a closing portion,
a cylindrical inner wall portion extending from the peripheral edge of the closing portion in a direction of insertion into the hole of the main body portion;
The inner wall portion is folded outward from the end on the insertion direction side, extends in a direction opposite to the insertion direction, is disposed so as to surround the inner wall portion, and is engaged with the hole on the outer periphery. a cylindrical outer wall portion having an engaging portion;
The seal flange portion includes a first flange portion extending radially outward from an end portion of the outer wall portion on a side opposite to the insertion direction;
a second flange portion connected to the tip of the first flange portion via an angle changing portion and further extending while being inclined in the insertion direction with respect to the first flange portion;
The angle change portion is provided with a thin portion having the smallest thickness in the normal direction of the outer surface of the seal flange portion,
The first flange portion gradually becomes thinner toward the outer diameter direction from the end portion of the outer wall portion on the side opposite to the insertion direction to reach the angle change portion, and the second flange portion A hole plug, characterized in that the hole plug extends from the angle change portion so as to become gradually thicker in an outer diameter direction.

A hole plug for closing a hole provided in a predetermined member,
It has a main body portion inserted into the hole and a seal flange portion that abuts on the front side peripheral edge of the hole,
The body portion includes a closing portion,
a cylindrical inner wall portion extending from the peripheral edge of the closing portion in a direction of insertion into the hole of the main body portion;
The inner wall portion is folded outward from the end on the insertion direction side, extends in a direction opposite to the insertion direction, is disposed so as to surround the inner wall portion, and is engaged with the hole on the outer periphery. a cylindrical outer wall portion having an engaging portion;
The seal flange portion includes a first flange portion extending radially outward from an end portion of the outer wall portion on a side opposite to the insertion direction;
a second flange portion connected to the tip of the first flange portion via an angle changing portion and further extending while being inclined in the insertion direction with respect to the first flange portion;
The angle change portion is provided with a thin portion having the smallest thickness in the normal direction of the outer surface of the seal flange portion,
A curved surface portion is provided on each of the outer surface and the inner surface of the angle changing portion,
The curve length of the inner surface side curved surface portion in a longitudinal section passing through the axis of the main body portion is longer than the curved surface length of the outer surface side curved surface portion in a longitudinal section passing through the axis of the main body portion. A hole plug characterized by being formed as follows.

A hole plug for closing a hole provided in a predetermined member,
It has a main body portion inserted into the hole and a seal flange portion that abuts on the front side peripheral edge of the hole,
The body portion includes a closing portion,
a cylindrical inner wall portion extending from the peripheral edge of the closing portion in a direction of insertion into the hole of the main body portion;
The inner wall portion is folded outward from the end on the insertion direction side, extends in a direction opposite to the insertion direction, is disposed so as to surround the inner wall portion, and is engaged with the hole on the outer periphery. a cylindrical outer wall portion having an engaging portion;
The seal flange portion includes a first flange portion extending radially outward from an end portion of the outer wall portion on a side opposite to the insertion direction;
a second flange portion connected to the tip of the first flange portion via an angle changing portion and further extending while being inclined in the insertion direction with respect to the first flange portion;
The angle change portion is provided with a thin portion having the smallest thickness in the normal direction of the outer surface of the seal flange portion,
The angle of the inner surface of the second flange portion with respect to the axis of the body in a longitudinal section passing through the axis of the body is the angle of the outer surface of the second flange in a longitudinal section passing through the axis of the body. , is provided so as to be smaller than the angle with respect to the axis of the main body,
A hole plug, wherein the tip portion on the inner surface side of the second flange portion is R-shaped, and the tip portion is configured to abut on the front side peripheral edge of the hole.