JP5480641B2

JP5480641B2 - Connector seal structure

Info

Publication number: JP5480641B2
Application number: JP2010006053A
Authority: JP
Inventors: 孝和高橋; 祐輔中山
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2010-01-14
Filing date: 2010-01-14
Publication date: 2014-04-23
Anticipated expiration: 2030-01-14
Also published as: JP2011146248A

Description

本発明は、コネクタのシール構造に係り、特に、電気機器が収容されるハウジング又は筐体の挿入孔にコネクタが挿入されたときのコネクタの外面と挿入孔の内面との隙間をシールする構造に関する。 The present invention relates to a sealing structure for a connector, and more particularly, to a structure for sealing a gap between an outer surface of a connector and an inner surface of the insertion hole when the connector is inserted into an insertion hole of a housing or housing in which an electric device is accommodated. .

車両等に搭載される電気機器は、液体及び気体の漏れや埃の侵入を防止するとともに騒音や振動等を遮断するため、筐体に覆われている。この筐体には、電気機器を外部の電線と接続するためのコネクタが嵌挿される挿入孔が設けられており、一般に、挿入孔は、コネクタの断面形状と相似形の断面矩形に形成されている。このコネクタは、筺体の挿入孔に挿入される筒部と、その筒部の外周から延出して挿入孔の周縁の筐体に当接するフランジ部を有しており、筒部の外面には、シール部材が装着される環状溝が設けられ、フランジ部には、筒部を挟んだ両側にそれぞれボルトが挿通される貫通孔が設けられている。 An electric device mounted on a vehicle or the like is covered with a housing in order to prevent leakage of liquid and gas and intrusion of dust and to block noise and vibration. This housing is provided with an insertion hole into which a connector for connecting an electrical device to an external electric wire is inserted. Generally, the insertion hole is formed in a cross-sectional rectangle similar to the cross-sectional shape of the connector. Yes. This connector has a cylindrical portion that is inserted into the insertion hole of the housing, and a flange portion that extends from the outer periphery of the cylindrical portion and comes into contact with the casing around the periphery of the insertion hole. An annular groove in which the seal member is mounted is provided, and the flange portion is provided with through holes through which bolts are inserted on both sides of the cylindrical portion.

このようにして構成されるコネクタは、環状溝にシール部材（例えば、ガスケット）が装着された筒部を筐体の挿入孔に挿入し、フランジ部の貫通孔に挿入されたボルトを筐体側のボルトのねじ孔に螺合させることにより筐体に取り付けられる。このようにコネクタと挿入孔との隙間をシール部材でシールした状態で、コネクタを筐体にボルトで固定するシール構造としては、例えば、特許文献１に開示されているものがある。 In the connector configured as described above, a cylindrical portion in which a seal member (for example, a gasket) is mounted in an annular groove is inserted into the insertion hole of the housing, and a bolt inserted into the through hole of the flange portion is inserted into the housing side. It is attached to the housing by being screwed into the screw hole of the bolt. As a sealing structure for fixing the connector to the casing with the bolt in a state where the gap between the connector and the insertion hole is sealed with the sealing member in this way, for example, there is one disclosed in Patent Document 1.

特開２００７−３１１２２４号公報JP 2007-31224 A

ところで、この種のシール構造において、コネクタに装着されるシール部材は全周に渡って溝底から均一な厚みで形成されている。したがって、コネクタが挿入孔に挿入された状態でボルトが締め付けられる前の時点では、シール部材が挿入孔の内面を全周に渡って均一に押圧しているため、良好なシール性が確保されている。 By the way, in this type of seal structure, the seal member attached to the connector is formed with a uniform thickness from the groove bottom over the entire circumference. Therefore, before the bolt is tightened with the connector inserted into the insertion hole, the sealing member uniformly presses the inner surface of the insertion hole over the entire circumference, so that a good sealing performance is ensured. Yes.

しかしながら、ボルトを締め付ける際には、ボルトがコネクタのフランジ部を押し付けながら回動するために、ボルトの回転力がコネクタに作用してコネクタがボルトの回転方向に従動し、挿入孔の中で筒部がボルトを中心として回動してしまうことがある。その結果、ボルトの回転方向に面する挿入孔の内面を押し付けるシール部材の押圧力は増大するが、ボルトの回転方向と反対方向に面する挿入孔の内面を押し付けるシール部材の押圧力は減少することになる。このように挿入孔の内面を押し付けるシール部材の押圧力が減少する領域が生じると、シール性が低下するおそれがある。 However, when tightening the bolt, since the bolt rotates while pressing the flange portion of the connector, the rotational force of the bolt acts on the connector, the connector follows the rotation direction of the bolt, and the cylinder is inserted in the insertion hole. The part may rotate around the bolt. As a result, the pressing force of the seal member that presses the inner surface of the insertion hole that faces the rotation direction of the bolt increases, but the pressing force of the seal member that presses the inner surface of the insertion hole that faces the direction opposite to the rotation direction of the bolt decreases. It will be. Thus, when the area | region where the pressing force of the sealing member which presses the inner surface of an insertion hole reduces arises, there exists a possibility that sealing performance may fall.

本発明は、ボルトを締め付けたことによるシール性の低下を抑制することを課題とする。 This invention makes it a subject to suppress the fall of the sealing performance by tightening a volt | bolt.

上記課題を解決するため、本発明は、断面矩形の筒部を有し、該筒部の外周に環状のシール部材が装着されたコネクタを機器のハウジング又は筺体に形成された挿入孔に挿入して固定するコネクタのシール構造において、コネクタの筒部の外周に突出させて形成された鍔部と、コネクタの筒部を挿入可能な開口と該開口の周縁に形成され鍔部が嵌挿される凹陥部と該凹陥部の底面側に形成され鍔部と対向する対向面が形成される取付部材とを有し、鍔部が凹陥部に嵌挿されたときに、凹陥部の内周面と鍔部の外周面との間及び開口の内面とその開口に挿入された筒部の外面との間には、それぞれ隙間が設けられてなり、取付部材は、機器のハウジング又は筺体に形成されたボルトのねじ孔に対応する位置に開口を挟んで形成された複数のボルトの貫通孔を有し、凹陥部の内面と鍔部の外面との間の隙間は、取付部材をコネクタの筒部に装着し、凹陥部に鍔部を嵌挿させた状態で、取付部材を機器のハウジング又は筺体にボルトで締め付け固定したときに、凹陥部の内面が鍔部の外面と接触しない隙間量に設定され、凹陥部の内面と鍔部の外面との間の隙間量は、開口の内面と該開口に挿入された筒部の外面との間の隙間量よりも小さく設定されてなることを特徴とする。 In order to solve the above-mentioned problems, the present invention inserts a connector having a cylindrical section having a rectangular section and an annular seal member on the outer periphery of the cylindrical section into an insertion hole formed in the housing or housing of the device. In the sealing structure of the connector to be fixed, a flange formed by projecting to the outer periphery of the cylindrical portion of the connector, an opening into which the cylindrical portion of the connector can be inserted, and a recess formed at the periphery of the opening and into which the flange is fitted. And a mounting member formed on the bottom side of the recessed portion and formed with a facing surface facing the flange, and when the flange is fitted into the recessed portion, the inner peripheral surface of the recessed portion and the flange during and opening of the inner surface of the outer circumferential surface of the part and between the outer surface of the cylindrical portion inserted into the opening, respectively become gap is provided, the mounting member is formed in the housing or casing of the equipment A plurality of bolts formed with an opening at a position corresponding to the screw hole of the bolt. Has a through-hole, the gap between the outer surface of the inner surface and the flange portion of the recessed portion, mounting the mounting member to the cylindrical portion of the connector, in a state where the inserted the flange portion to the recessed portion, the mounting member When tightened and fixed to the housing or housing of the equipment with bolts, the clearance is set so that the inner surface of the recess does not contact the outer surface of the flange, and the clearance between the inner surface of the recess and the outer surface of the flange is Is set to be smaller than the gap amount between the inner surface of the tube and the outer surface of the cylindrical portion inserted into the opening .

このような構成によれば、ボルトの締め付け時には、ボルトの回転力がボルトと当接する取付部材に作用して取付部材を回動させるが、取付部材とコネクタとの間には、取付部材の回動方向で隙間が設けられているため、取付部材が隙間の範囲を回動する限り、コネクタとの接触を防ぐことができる。したがって、この隙間をある程度確保することにより、コネクタの回動、つまり挿入孔に挿入された筒部がボルトを中心として回動するのを防ぐことができ、或いは、筒部の回動角度を少なくすることができるため、筒部の外面と挿入孔の内面との隙間のシール性の低下を抑制することができる。 According to such a configuration, at the time of tightening the bolt, the rotational force of the bolt acts on the mounting member that contacts the bolt to rotate the mounting member, but the mounting member is rotated between the mounting member and the connector. Since the gap is provided in the moving direction, contact with the connector can be prevented as long as the mounting member rotates within the gap. Therefore, by securing this clearance to some extent, it is possible to prevent the rotation of the connector, that is, the cylindrical portion inserted into the insertion hole from rotating about the bolt, or reduce the rotational angle of the cylindrical portion. Therefore, it is possible to suppress a decrease in the sealing performance of the gap between the outer surface of the cylindrical portion and the inner surface of the insertion hole.

この場合において、隙間は、例えば、ボルトを締め付けたときに取付部材が回動する角度を予め把握しておき、その角度に基づいて設定することができる。このようにすれば、ボルトの締め付け時における筒部の外面と挿入孔の内面との接触を防ぐことができるため、シール性の低下をより確実に防ぐことができる。 In this case, the gap can be set based on, for example, an angle at which the mounting member rotates when the bolt is tightened. If it does in this way, since the contact with the outer surface of the cylinder part at the time of bolt fastening and the inner surface of an insertion hole can be prevented, the fall of sealing nature can be prevented more certainly.

本発明を適用してなるシール構造の一実施形態の全体構成を説明する分解斜視図である。It is a disassembled perspective view explaining the whole structure of one Embodiment of the seal structure to which this invention is applied. 図１の取付部材とコネクタの構成を拡大して示す斜視図である。It is a perspective view which expands and shows the structure of the attachment member and connector of FIG. 図１のコネクタに取付部材が装着された状態を示す側面図である。FIG. 2 is a side view showing a state where an attachment member is mounted on the connector of FIG. 1. 図１のコネクタに取付部材を装着してボルトを締め付ける前に、コネクタの鍔部と取付部材の凹陥部との間に隙間が生じることを説明する図である。It is a figure explaining a clearance gap producing between the collar part of a connector, and the recessed part of an attachment member, before attaching an attachment member to the connector of FIG. 1, and tightening a volt | bolt. 本発明を適用してなるシール構造において、ボルトを締め付けるときの動作を説明する図である。It is a figure explaining operation | movement when tightening a volt | bolt in the seal structure to which this invention is applied. 図５のＢ−Ｂ矢示断面図であり、ボルトを締め付けた後の構成を説明する図である。FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 5, illustrating a configuration after tightening a bolt. 図６のＣ部を拡大して示す断面図である。It is sectional drawing which expands and shows the C section of FIG.

以下、本発明を適用してなるシール構造の一実施形態について図１乃至図６を参照して説明する。 Hereinafter, an embodiment of a seal structure to which the present invention is applied will be described with reference to FIGS.

図１に示すように、本実施形態のシール構造１は、図示しない電気機器が収容される筐体３の挿入孔５の内面７と、挿入孔５に嵌挿されるコネクタ９の外面１１との隙間をシール部材１３で封止するシール構造をいう。ここで、電気機器とは、例えば、車両等に搭載される電動モータ等、機械を駆動させるための装置をいう。筐体３は、ここでは電気機器等を収容する金属製の容器をいうが、端子や電気機器等を収容するハウジングであってもよい。筐体３には、電気機器の端子台に対向する壁面にコネクタ９を取り付けるための矩形の挿入孔５が形成されており、挿入孔５の長手方向（図１の左右方向）の両側の周縁には、それぞれボルトのねじ孔１５が１個ずつ形成されている。 As shown in FIG. 1, the seal structure 1 of the present embodiment includes an inner surface 7 of an insertion hole 5 of a housing 3 in which an electric device (not shown) is accommodated, and an outer surface 11 of a connector 9 that is inserted into the insertion hole 5. A seal structure in which the gap is sealed with the seal member 13. Here, the electric device refers to a device for driving a machine, such as an electric motor mounted on a vehicle or the like. The housing 3 is a metal container that houses electrical equipment or the like here, but may be a housing that houses terminals, electrical equipment, or the like. A rectangular insertion hole 5 for attaching the connector 9 to the wall surface facing the terminal block of the electrical device is formed in the housing 3, and the peripheral edges on both sides in the longitudinal direction (left-right direction in FIG. 1) of the insertion hole 5. Each is formed with one screw hole 15 of a bolt.

コネクタ９は、例えば、電気機器の端子台に複数の電線を端子を介して電気的に接続するためのものであり、絶縁性を有する合成樹脂等で形成されている。このコネクタ９は、筺体３の挿入孔５に嵌挿される筒部１７と、筒部１７の外面から周状に突出して挿入孔５の周縁と当接する鍔部１９を有している。筒部１７は、鍔部１９の両面側からそれぞれ同軸状に延出して形成され、以下、挿入孔５に挿入する方向に延出する部分を筒部１７といい、筒部１７と反対側に延出する部分を電線支持部２１という。筒部１７と電線支持部２１は、鍔部１９を挟んで同軸状に延在するとともに内部が連通されて形成され、その内部には電線を案内して端末部分を係止する係止部２３（図６）を備えた中空状の案内面２５（図２）が複数並列に設けられている。筒部１７は、その外面１１が挿入孔５の断面形状と相似形の断面矩形をなしており、外面１１には、環状溝２７が全周に渡って形成されている。また、鍔部１９は、筒部１７の挿入方向から見て略矩形に形成されている。 The connector 9 is, for example, for electrically connecting a plurality of electric wires to a terminal block of an electric device via a terminal, and is formed of a synthetic resin having insulating properties. The connector 9 includes a cylindrical portion 17 that is inserted into the insertion hole 5 of the casing 3, and a flange portion 19 that protrudes circumferentially from the outer surface of the cylindrical portion 17 and comes into contact with the peripheral edge of the insertion hole 5. The cylindrical portion 17 is formed so as to extend coaxially from both sides of the flange portion 19, and hereinafter, a portion extending in the direction of insertion into the insertion hole 5 is referred to as a cylindrical portion 17, on the opposite side to the cylindrical portion 17. The extending part is referred to as an electric wire support part 21. The cylindrical portion 17 and the electric wire support portion 21 are formed so as to extend coaxially with the flange portion 19 in between and communicate with each other inside, and a locking portion 23 that guides the electric wire and locks the terminal portion therein. A plurality of hollow guide surfaces 25 (FIG. 2) having (FIG. 6) are provided in parallel. The cylindrical portion 17 has an outer surface 11 having a cross-sectional rectangle similar to the cross-sectional shape of the insertion hole 5, and an annular groove 27 is formed on the outer surface 11 over the entire circumference. The flange portion 19 is formed in a substantially rectangular shape when viewed from the insertion direction of the tube portion 17.

シール部材１３は、コネクタ９の筒部１７の環状溝２７に装着される環状のガスケットであり、例えば、ゴム系の樹脂材料やウレタン系、アクリル系等の弾力性のある樹脂材料で形成されている。図２、３に示すように、本実施形態のシール部材１３は、筐体３の挿入孔５の内面７との密着性を高める複数のリップが全周に渡って突出して形成されている。 The seal member 13 is an annular gasket that is attached to the annular groove 27 of the cylindrical portion 17 of the connector 9, and is formed of, for example, an elastic resin material such as a rubber resin material, a urethane resin, or an acrylic resin. Yes. As shown in FIGS. 2 and 3, the seal member 13 of the present embodiment is formed with a plurality of lips projecting over the entire circumference to enhance the adhesion with the inner surface 7 of the insertion hole 5 of the housing 3.

次に、本実施形態のシール構造１における特徴構成について説明する。図１、２に示すように、本実施形態のシール構造１は、コネクタ９、シール部材１３とともに、取付部材２９を備えて構成される。取付部材２９には、コネクタ９の電線支持部２１が緩やかに挿入される開口３１と、開口３１の周縁に形成されて鍔部１９が嵌挿される凹陥部３３（図２）と、ボルト３５が挿通される貫通孔３７が設けられている。貫通孔３７は、開口３１を挟む両側に１つずつ設けられ、筺体３のねじ孔１５と対応する位置に配置されている。なお、貫通孔３７は、ねじ孔１５に対応させて、開口３１の両側に例えば２つずつ設けられていてもよい。 Next, the characteristic structure in the seal structure 1 of the present embodiment will be described. As shown in FIGS. 1 and 2, the seal structure 1 of the present embodiment includes an attachment member 29 together with a connector 9 and a seal member 13. The attachment member 29 includes an opening 31 into which the wire support portion 21 of the connector 9 is gently inserted, a recessed portion 33 (FIG. 2) formed around the opening 31 into which the flange portion 19 is inserted, and a bolt 35. A through hole 37 to be inserted is provided. One through hole 37 is provided on each side of the opening 31 and is disposed at a position corresponding to the screw hole 15 of the housing 3. Note that two through holes 37 may be provided, for example, two on each side of the opening 31 corresponding to the screw holes 15.

取付部材２９の開口３１は、電線支持部２１の断面形状と相似形となるほぼ矩形の貫通孔をなして形成されている。この開口３１の内面３９には、電線支持部２１に設けられる突起に対応する複数の逃がし溝が形成されている。すなわち、電線支持部２１には、両端の対向する外面から延出する突起面４１、相手側コネクタを係止するための係止突起４３、取付部材２９を仮係止するための仮係止突起４５が設けられており、開口３１の内面３９には、それぞれ、突起面４１に対応する逃がし溝４７、係止突起４３に対応する逃がし溝４９、仮係止突起４５に対応する図示しない係止溝が設けられている。 The opening 31 of the attachment member 29 is formed so as to form a substantially rectangular through hole that is similar to the cross-sectional shape of the wire support portion 21. A plurality of relief grooves corresponding to the protrusions provided on the wire support portion 21 are formed on the inner surface 39 of the opening 31. That is, the wire support portion 21 has a protruding surface 41 extending from the opposing outer surfaces at both ends, a locking protrusion 43 for locking the mating connector, and a temporary locking protrusion for temporarily locking the mounting member 29. 45 is provided, and an inner surface 39 of the opening 31 is provided with an escape groove 47 corresponding to the projection surface 41, an escape groove 49 corresponding to the engagement projection 43, and a not-shown engagement corresponding to the temporary engagement projection 45, respectively. Grooves are provided.

取付部材２９の凹陥部３３は、図２の矢印Ａの方向から見たときに、その内面５１が、コネクタ９の鍔部１９の外形と相似形のほぼ矩形に形成されており、鍔部１９が平面方向で凹陥部３３に包囲されるようになっている。また、凹陥部３３の底面側には、凹陥部３３に嵌挿された鍔部１９の側面５３と対向する対向面５５が形成されており、凹陥部３３の入口周縁の面５７から対向面５５までの距離、つまり凹陥部３３の深さは、鍔部１９の厚み以上に設定されている。このように、鍔部１９がその平面方向及び厚み方向において凹陥部３３に完全に収納されることにより、コネクタ９は取付部材２９により所定の固定力を得た状態で、筺体３に取り付けられることになる。 When viewed from the direction of arrow A in FIG. 2, the inner surface 51 of the recessed portion 33 of the attachment member 29 is formed in a substantially rectangular shape similar to the outer shape of the flange portion 19 of the connector 9. Is surrounded by the recessed portion 33 in the planar direction. Further, a facing surface 55 is formed on the bottom surface side of the recessed portion 33 so as to face the side surface 53 of the flange portion 19 fitted in the recessed portion 33, and the facing surface 55 extends from the surface 57 on the peripheral edge of the entrance of the recessed portion 33. The distance up to, that is, the depth of the recessed portion 33 is set to be equal to or greater than the thickness of the flange portion 19. In this way, when the flange portion 19 is completely housed in the recessed portion 33 in the planar direction and the thickness direction, the connector 9 is attached to the housing 3 with a predetermined fixing force obtained by the attachment member 29. become.

図４は、図２、３を矢印Ａ方向から見たときのボルト３５の締め付け前の状態を示している。図に示すように、鍔部１９の外面５９と凹陥部３３の内面５１との間には、全周に渡って隙間（クリアランス）が形成されており、具体的には、Ｘ方向においてＬ_１の隙間が形成され、Ｙ方向においてＬ_２の隙間が形成されている。一方、取付部材２９の開口３１は、例えば、コネクタ９の電線支持部２１を逃がすための逃がし孔となるため、その場合、電線支持部２１の外面と開口３１の内面３９との隙間は、Ｘ、Ｙ方向においてそれぞれＬ_１、Ｌ_２よりも大きく設定され、電線支持部２１は開口３１内に比較的緩やかに挿入される。なお、この隙間は、鍔部１９の外面５９と凹陥部３３の内面５１との隙間と同様の大きさに設定することもできる。 FIG. 4 shows a state before tightening the bolt 35 when FIGS. 2 and 3 are viewed from the direction of the arrow A. As shown in the figure, a gap (clearance) is formed over the entire circumference between the outer surface 59 of the flange portion 19 and the inner surface 51 of the recessed portion 33, and specifically, L _{1 in} the X direction. the gap is formed, a gap L ₂ are formed in the Y direction. On the other hand, the opening 31 of the attachment member 29 is, for example, an escape hole for allowing the wire support portion 21 of the connector 9 to escape. In this case, the gap between the outer surface of the wire support portion 21 and the inner surface 39 of the opening 31 is X , Y direction is set to be larger than L ₁ and L ₂ , respectively, and the wire support portion 21 is inserted into the opening 31 relatively gently. The gap can be set to the same size as the gap between the outer surface 59 of the flange portion 19 and the inner surface 51 of the recessed portion 33.

次に、本実施形態のシール構造を組み立てる手順について図１を参照して説明する。先ず、コネクタ９の筒部１７に形成される環状溝２７にシール部材１３を装着する。そして、シール部材１３が装着されたコネクタ９を筺体３に近づけ、筒部１７を挿入孔５に嵌挿させる。このとき、コネクタ９の挿入量は、鍔部１９が挿入孔５の周縁に当接することにより規制される。次に、取付部材２９をコネクタ９に近づけ、係止突起４３と逃がし溝４９、及び、突起面４１と逃がし溝４７をそれぞれ位置合わせした状態で、取付部材２９の開口３１内に電線支持部２１を挿通させる。これにより、仮係止突起４５が取付部材２９の図示しない係止溝に係止されて、取付部材２９がコネクタ９に仮固定された状態となり、さらには、コネクタ９の電線支持部２１が取付部材２９の開口３１内に同心状で挿通されるとともに、コネクタ９の鍔部１９が取付部材２９の凹陥部３３に収容された状態となる。 Next, the procedure for assembling the seal structure of this embodiment will be described with reference to FIG. First, the seal member 13 is mounted in the annular groove 27 formed in the cylindrical portion 17 of the connector 9. Then, the connector 9 on which the seal member 13 is mounted is brought close to the housing 3 and the cylindrical portion 17 is inserted into the insertion hole 5. At this time, the insertion amount of the connector 9 is regulated by the flange portion 19 coming into contact with the peripheral edge of the insertion hole 5. Next, the attachment member 29 is brought close to the connector 9, and the wire support portion 21 is placed in the opening 31 of the attachment member 29 in a state where the locking projection 43 and the escape groove 49, and the projection surface 41 and the escape groove 47 are aligned. Is inserted. As a result, the temporary locking projection 45 is locked in a locking groove (not shown) of the mounting member 29 so that the mounting member 29 is temporarily fixed to the connector 9. Further, the electric wire support portion 21 of the connector 9 is mounted. While being inserted concentrically into the opening 31 of the member 29, the flange portion 19 of the connector 9 is accommodated in the recessed portion 33 of the attachment member 29.

このように取付部材２９がコネクタ９に仮固定された状態では、取付部材２９の２箇所の貫通孔３７と筺体３の２箇所のねじ孔１５は、自然と位置合わせがされるため、取付部材２９側から貫通孔３７に挿入したボルト３５を筺体３のねじ孔１５に螺合させることにより、取付部材２９は、コネクタ９を介して筺体３に固定された状態となる。これにより、コネクタ９の筒部１７と筺体３の挿入孔５との隙間がシール部材１３で封止されたシール構造が完成する。 Thus, in the state where the attachment member 29 is temporarily fixed to the connector 9, the two through holes 37 of the attachment member 29 and the two screw holes 15 of the housing 3 are naturally aligned, so the attachment member By attaching the bolt 35 inserted into the through hole 37 from the 29 side into the screw hole 15 of the housing 3, the mounting member 29 is fixed to the housing 3 via the connector 9. As a result, a seal structure in which the gap between the cylindrical portion 17 of the connector 9 and the insertion hole 5 of the housing 3 is sealed with the seal member 13 is completed.

次に、ボルト３５の締め付けがシール構造のシール性に与える影響について図面を参照して説明する。図５に示すように、筺体３の挿入孔５に挿入されたコネクタ９に取付部材２９を装着した状態で、取付部材２９の片方の貫通孔３７にボルト３５を通して締め付けた場合、ボルト３５と取付部材９との間には、ボルト３５の回転に伴う摩擦力が発生する。この摩擦力により、取付部材２９はボルト３５を中心としてボルト３５の回転方向ａ（時計回り）に従動し、例えばθの角度だけ回動する。ここで、実際の組み立て作業においては、２本のボルト３５を交互に締め付けることが多く、各ボルト３５の締め付けに伴う取付部材２９の回動方向は逆方向になるが、ボルト３５の締め付け方によっては、一方のボルトの締め付けによる影響が他方よりも大きくなるため、大抵は、取付部材２９がいずれかの方向に回動した状態で固定される。 Next, the effect of tightening the bolt 35 on the sealing performance of the seal structure will be described with reference to the drawings. As shown in FIG. 5, when the mounting member 29 is attached to the connector 9 inserted into the insertion hole 5 of the housing 3 and the bolt 35 is tightened through one through hole 37 of the mounting member 29, A frictional force accompanying the rotation of the bolt 35 is generated between the member 9 and the member 9. Due to this frictional force, the attachment member 29 follows the rotation direction a (clockwise) of the bolt 35 around the bolt 35 and rotates, for example, by an angle of θ. Here, in actual assembly work, the two bolts 35 are often alternately tightened, and the rotation direction of the mounting member 29 accompanying the tightening of each bolt 35 is opposite, but depending on how the bolts 35 are tightened Since the influence of tightening one bolt is greater than that of the other, the fixing member 29 is usually fixed in a state of rotating in either direction.

このようなボルト３５の締め付けにより、仮に、コネクタ９が回動した場合、筺体３の挿入孔５に挿入される筒部１７は、ボルト３５を中心として挿入孔５の中を回動することになる。ここで、筒部１７の外面には環状のシール部材１３が装着されているため、筒部１７が回動すると、筒部１７の回動方向に面する挿入孔５の内面を押し付けるシール部材１３の押圧力が増加する一方、その反対方向に面する挿入孔５の内面を押し付けるシール部材１３の押圧力が減少することになる。このようにシール部材１３の押圧力が減少する領域が生じると、コネクタ９と筺体３の挿入孔５との隙間のシール性が低下するおそれがある。したがって、このようなシール性の低下を防ぐためには、コネクタ９の回動を防ぎ、シール部材１３が挿入孔５の内面７に、周方向で均一な押圧力を付与する状態を確保する必要がある。 If the connector 9 is rotated by such tightening of the bolt 35, the cylindrical portion 17 inserted into the insertion hole 5 of the housing 3 rotates in the insertion hole 5 around the bolt 35. Become. Here, since the annular seal member 13 is mounted on the outer surface of the tube portion 17, when the tube portion 17 rotates, the seal member 13 presses the inner surface of the insertion hole 5 facing the rotation direction of the tube portion 17. The pressing force of the seal member 13 that presses the inner surface of the insertion hole 5 facing in the opposite direction decreases. Thus, when the area | region where the pressing force of the sealing member 13 reduces arises, there exists a possibility that the sealing performance of the clearance gap between the connector 9 and the insertion hole 5 of the housing 3 may fall. Therefore, in order to prevent such deterioration of the sealing performance, it is necessary to prevent the connector 9 from rotating and to ensure that the sealing member 13 applies a uniform pressing force to the inner surface 7 of the insertion hole 5 in the circumferential direction. is there.

本実施形態では、取付部材２９の開口３１内にコネクタ９の電線支持部２１が緩やかに挿入されるとともに、取付部材２９の凹陥部３３にはコネクタ９の鍔部１９が嵌挿された状態となっている。ここで、凹陥部３３の内面５１とコネクタ９の鍔部１９の外面５９との間には、図４で示したように、全周に渡って所定の隙間（Ｌ_１、Ｌ_２）が設けられている。そのため、この隙間の範囲内で取付部材２９が回動する限りは、コネクタ９の回動、つまり挿入孔５の中でのボルト３５を中心とした筒部１７を回動することを防ぐことができる。これにより、シール部材１３が挿入孔５の内面に作用する押圧力を均一な状態で保持することができ、良好なシール性を確保することができる。 In the present embodiment, the wire support portion 21 of the connector 9 is gently inserted into the opening 31 of the attachment member 29, and the flange portion 19 of the connector 9 is inserted into the recessed portion 33 of the attachment member 29. It has become. Here, as shown in FIG. 4, predetermined gaps (L ₁ , L ₂ ) are provided between the inner surface 51 of the recessed portion 33 and the outer surface 59 of the flange portion 19 of the connector 9. It has been. Therefore, as long as the attachment member 29 rotates within the gap, it is possible to prevent the rotation of the connector 9, that is, the rotation of the cylindrical portion 17 around the bolt 35 in the insertion hole 5. it can. Thereby, the pressing force which the seal member 13 acts on the inner surface of the insertion hole 5 can be kept in a uniform state, and good sealing performance can be ensured.

図６及び図７に、ボルト３５を締め付けた後のシール構造１の断面を示す。図６は、図５のＢ−Ｂ矢示断面を表し、図６のＣ部を拡大したのが図７である。これらの図において、コネクタ９の筒部１７と筺体３の挿入孔５との隙間は、シール部材１３の圧縮代を分かりやすくするため、シール部材１３は断面方向で変形させずに挿入孔５の内面７と重ねて表している。ここで、圧縮代とは、挿入孔５の内面７と重なるシール部材１３の厚みをいうものとする。 6 and 7 show a cross section of the seal structure 1 after the bolt 35 is tightened. FIG. 6 shows a cross section taken along the line B-B in FIG. 5, and FIG. 7 is an enlarged view of a portion C in FIG. 6. In these drawings, the clearance between the cylindrical portion 17 of the connector 9 and the insertion hole 5 of the housing 3 makes it easy to understand the compression allowance of the seal member 13. Overlaid with the inner surface 7. Here, the compression allowance refers to the thickness of the seal member 13 that overlaps the inner surface 7 of the insertion hole 5.

図に示すように、取付部材２９が回動することにより、取付部材２９の凹陥部３３の内面５１とコネクタ９の鍔部１９の外面５９との間には、対向する領域（図では上下の隙間領域）において、偏りが発生する。すなわち、ボルト３５の締め付け前は、上側の隙間と下側の隙間のいずれも、Ｌ２の幅（図４）が確保されていたのに対し、ボルト３５の締め付け後は、一方の隙間がＬ_３まで減少し、他方の隙間がＬ_４まで増加する（図７）。同様に、取付部材２９の開口３１の内面３９とコネクタ９の電線支持部２１の外面６１との隙間においても、上下の隙間領域に偏りが発生する。このように、ボルト３５の締め付け後においては、取付部材２９とコネクタ９との隙間に偏りが生じるが、取付部材２９は、ボルト３５の締め付け前に形成されていたコネクタ９との隙間の範囲内で回動するため、コネクタ９は、取付部材２９の回動方向から押し付けられることがなく、静止する状態が維持される。そのため、シール部材１３は、ボルト３５の締め付け前後で、圧縮代Ｌ_５が均一な状態で保持される。 As shown in the figure, when the attachment member 29 is rotated, there is an opposing region (in the drawing, the upper and lower sides) between the inner surface 51 of the recessed portion 33 of the attachment member 29 and the outer surface 59 of the flange portion 19 of the connector 9. In the gap area), a bias occurs. That is, before the bolt 35 is tightened, the width of L2 (FIG. 4) is secured in both the upper gap and the lower gap, whereas after the bolt 35 is tightened, one gap is L _3. decreases to the other gap is increased to L ₄ (Fig. 7). Similarly, even in the gap between the inner surface 39 of the opening 31 of the mounting member 29 and the outer surface 61 of the wire support portion 21 of the connector 9, a deviation occurs in the upper and lower gap regions. As described above, after the bolt 35 is tightened, the gap between the mounting member 29 and the connector 9 is biased. However, the mounting member 29 is within the range of the gap with the connector 9 formed before the bolt 35 is tightened. Therefore, the connector 9 is not pressed from the rotation direction of the mounting member 29, and the stationary state is maintained. Therefore, the sealing member 13, before and after the tightening of the bolt 35, the compression margin L ₅ is maintained in a uniform state.

ここで、取付部材２９の凹陥部３３の内面５１とコネクタ９の鍔部１９の外面５９との隙間、及び、取付部材２９の開口３１の内面３９とコネクタ９の電線支持部２１の外面６１との隙間を設定する方法としては、例えば、２本のボルト３５の締め付け方、具体的には、締める順番や回転数などを標準化しておく。そして、２本のボルト３５が締め付けられたときに、コネクタ９が所定方向に回動する角度θを予め計測又は算出により把握しておくことにより、その計測又は算出結果に基づいて隙間量を設定することができる。 Here, the gap between the inner surface 51 of the recessed portion 33 of the attachment member 29 and the outer surface 59 of the flange portion 19 of the connector 9, and the inner surface 39 of the opening 31 of the attachment member 29 and the outer surface 61 of the wire support portion 21 of the connector 9 As a method for setting the gap, for example, a method of tightening the two bolts 35, specifically, a tightening order, a rotation speed, and the like are standardized. Then, when the two bolts 35 are tightened, the angle θ at which the connector 9 rotates in a predetermined direction is grasped in advance by measurement or calculation, and the gap amount is set based on the measurement or calculation result. can do.

以上述べたように、本実施形態では、コネクタ９をボルト３５で直接締め付けるのではなく、コネクタ９と別体の取付部材２９をボルト３５で締め付ける構成を採用するとともに、コネクタ９と取付部材２９との間には、取付部材２９の回転方向に所定の大きさの隙間を設けているため、ボルト３５を締め付けたときの回転力を隙間の範囲だけ、取付部材２９の回転で吸収させることができる。これにより、ボルト３５を中心とするコネクタ９の回動を防ぐことができるため、コネクタ９の筒部１７の外面１１と筺体３の挿入孔５の内面７との隙間をシール部材１３で均一に封止することができ、良好なシール性を確保することができる。 As described above, in this embodiment, the connector 9 is not directly tightened with the bolt 35, but a configuration in which the mounting member 29 separate from the connector 9 is tightened with the bolt 35 is adopted. Since a gap of a predetermined size is provided in the rotation direction of the attachment member 29, the rotational force when the bolt 35 is tightened can be absorbed by the rotation of the attachment member 29 within the gap range. . Thereby, the rotation of the connector 9 around the bolt 35 can be prevented, so that the gap between the outer surface 11 of the cylindrical portion 17 of the connector 9 and the inner surface 7 of the insertion hole 5 of the housing 3 is made uniform by the seal member 13. It can seal and can ensure favorable sealing performance.

１シール構造
３筐体
５挿入孔
７内面
９コネクタ
１１外面
１３シール部材
１５ねじ孔
１７筒部
１９鍔部
２１電線支持部
２９取付部材
３１開口
３３凹陥部
３５ボルト
３７貫通孔
３９内面
５１内面
５５対向面
６１外面 DESCRIPTION OF SYMBOLS 1 Seal structure 3 Housing | casing 5 Insertion hole 7 Inner surface 9 Connector 11 Outer surface 13 Seal member 15 Screw hole 17 Cylindrical part 19 Gutter part 21 Electric wire support part 29 Mounting member 31 Opening 33 Recessed part 35 Bolt 37 Through-hole 39 Inner surface 51 Inner surface 55 Opposite Surface 61 Outer surface

Claims

In a connector sealing structure that has a cylindrical portion having a substantially rectangular cross section, and inserts and fixes a connector having an annular seal member attached to the outer periphery of the cylindrical portion into an insertion hole formed in a housing or housing of the device,
A flange formed by projecting to the outer periphery of the tubular portion of the connector, an opening into which the tubular portion of the connector can be inserted, a recessed portion formed on the periphery of the opening and into which the flange is fitted, and the recessed portion And an attachment member formed on the bottom surface side of the flange portion and facing the flange portion, and when the flange portion is fitted into the recess portion, the inner surface of the recess portion and the flange portion between the outer surface of the tubular portion between and is inserted into the inner surface and the opening of said opening in the outer surface, respectively become gap is provided,
The mounting member has a plurality of bolt through holes of which the opening is interposed in a position corresponding to the screw hole of the formed in the housing or the housing of the device the bolt,
The gap between the inner surface of the recessed portion and the outer surface of the flange portion is such that the mounting member is mounted on the cylindrical portion of the connector, and the mounting member is inserted into the recessed portion. When tightened and fixed to the housing or the housing of the device with the bolt, the inner surface of the recessed portion is set to a gap amount that does not contact the outer surface of the flange,
The gap amount between the inner surface of the recessed portion and the outer surface of the flange portion is set to be smaller than the gap amount between the inner surface of the opening and the outer surface of the cylindrical portion inserted into the opening. Characteristic connector seal structure.