JP5325470B2 - Rubber stopper mounting structure, rubber stopper, and terminal fitting - Google Patents

Description

本発明は、端子金具へのゴム栓の取付構造に関する。   The present invention relates to a structure for attaching a rubber plug to a terminal fitting.

防水コネクタ等に用いられるゴム栓は、下記の特許文献１に示すように、ゴム栓の備える電線加締め部を端子金具のインシュレーションバレルで加締められ、電線とキャビティとの間をシールするように構成されている。   As shown in Patent Document 1 below, a rubber plug used for a waterproof connector or the like is such that a wire crimping portion provided in a rubber plug is crimped by an insulation barrel of a terminal fitting so as to seal between the wire and the cavity. It is configured.

特開２００４−２８８４３２号公報JP 2004-288432 A

上記従来のゴム栓では、加締められると切れが生じ、また、加締め位置がばらつくことで、シール機能が低下する虞があった。   In the above conventional rubber plug, there is a possibility that a cut occurs when it is crimped, and that the sealing function is deteriorated due to variations in the crimping position.

本発明は斯かる課題に鑑みてなされたもので、上記課題を解決できるゴム栓の取付構造、ゴム栓、及び端子金具を提供することを目的とする。   This invention is made | formed in view of such a subject, and it aims at providing the attachment structure of a rubber plug, a rubber plug, and a terminal metal fitting which can solve the said subject.

このような目的を達成するために、本発明の取付構造を有するゴム栓は、端子金具へ取り付けられるゴム栓であって、
前記端子金具に設けられた狭持片に圧入されて狭持される樹脂又は金属製の圧入部を備え、前記圧入部は、樹脂又は金属から形成された圧入筒と、該圧入筒から拡径して延び外面及び内面をシール部で覆われた嵌合筒と、前記狭持片の左右の両側壁にコの字の切り抜きを設けてワイヤバレルで加締められた電線の外周に前端を当接させるまで前記狭持片の内方に屈曲させて前方に延びた前記狭持片の舌片により、前記狭持片に前記圧入部が圧入された前記端子金具と前記圧入部とが係止される係止手段と、を備えた取付構造を有することを特徴とする。
In order to achieve such an object, the rubber plug having the mounting structure of the present invention is a rubber plug to be attached to a terminal fitting,
A resin or metal press-fitting portion that is press-fitted into a pinch piece provided on the terminal fitting is provided, and the press-fitting portion includes a press-fitting cylinder formed of resin or metal, and a diameter expanded from the press-fitting cylinder. front and extending beauty outside surface and an inner surface and a fitting tube covered with the seal portion, the outer periphery of the left and right on both side walls provided with a cutout of the U-shaped wire which is crimped by the wire barrel of the holding piece The terminal fitting in which the press-fitting portion is press-fitted into the holding piece by the tongue piece of the holding piece that is bent inwardly and extends forward until the holding piece is brought into contact with the holding piece. It has the attachment structure provided with the latching means latched .

本発明によれば、ゴム栓の切れや加締め位置のばらつきを防いで、シール機能の低下を抑え、ゴム栓を用いた防水の信頼性を高めることができる。   According to the present invention, it is possible to prevent the rubber plug from being cut and the variation in the caulking position, to suppress the deterioration of the sealing function, and to improve the reliability of waterproofing using the rubber plug.

以下、図面を参照して、本発明の最良の形態を説明する。
図１は、本実施形態の端子金具５及びゴム栓１の前方からの斜視図である。図２は、ゴム栓１の縦断面図である。端子金具５は、銅等の金属から形成されており、図１に示すように、相手方の端子金具と接続される接続部５１と、電線の芯線を加締めるワイヤバレル５２と、ゴム栓１を左右の側方から包み込んで挟持する挟持片５３とを備えている。 Hereinafter, the best mode of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view from the front of the terminal fitting 5 and the rubber plug 1 of the present embodiment. FIG. 2 is a longitudinal sectional view of the rubber plug 1. The terminal fitting 5 is made of a metal such as copper, and as shown in FIG. 1, a connection portion 51 connected to the other terminal fitting, a wire barrel 52 for caulking the core wire of the electric wire, and the rubber plug 1 And a clamping piece 53 that is wrapped and clamped from the left and right sides.

挟持片５３は、ワイヤバレル５２の後縁から左右方向に延びた略矩形の平板体を、その左右の端部を間隙５５を設けて向かい合わせ、角筒状に丸めた概略形状を有している。挟持片５３の左右の両側壁には、コの字の切り抜きを設けて形成されて前方に延びた舌片を、挟持片５３の内方に屈曲させた形状を有した係止片５６が設けられている。係止片５６は、ワイヤバレル５２で加締められた電線の外周に前端を当接させるまで、挟持片５３の内方に屈曲している。   The sandwiching piece 53 has a schematic shape obtained by rolling a substantially rectangular flat plate extending in the left-right direction from the rear edge of the wire barrel 52, with the left and right ends thereof facing each other with a gap 55, and rounded into a rectangular tube shape. Yes. On both the left and right side walls of the holding piece 53, there are provided locking pieces 56 having a shape in which a tongue piece formed by providing a U-shaped cutout and bent forward is bent inward of the holding piece 53. It has been. The locking piece 56 is bent inward of the holding piece 53 until the front end is brought into contact with the outer periphery of the electric wire crimped by the wire barrel 52.

ゴム栓１は、円筒状の概略形状を有したゴム製のシール部３と、シール部３の前面から前方に延びた圧入部２とを備えている。シール部３は、圧入部２と一体化されており、図２に示すように、その内側が電線の挿通孔３２となっている。挿通孔３２の内面は、挿通孔３２に挿通された電線の外周面と密着して、キャビティ内をシールする。シール部３の前端部には、シール部３の外周面を膨出させて構成された２本のシール突条３１が、シール部３の周方向に沿って環状を呈して延びている。シール突条３１は、図示しないコネクタのキャビティにシール部３が収容されると、キャビティの内壁面と密着してキャビティ内をシールする。   The rubber plug 1 includes a rubber seal portion 3 having a substantially cylindrical shape, and a press-fit portion 2 extending forward from the front surface of the seal portion 3. The seal part 3 is integrated with the press-fitting part 2, and as shown in FIG. 2, the inner side is an insertion hole 32 for an electric wire. The inner surface of the insertion hole 32 is in close contact with the outer peripheral surface of the electric wire inserted through the insertion hole 32 to seal the inside of the cavity. At the front end of the seal portion 3, two seal protrusions 31 formed by expanding the outer peripheral surface of the seal portion 3 extend in an annular shape along the circumferential direction of the seal portion 3. When the seal portion 3 is accommodated in a connector cavity (not shown), the seal protrusion 31 comes into close contact with the inner wall surface of the cavity and seals the inside of the cavity.

圧入部２は、ＰＢＴ（ポリブチレンテレフタレート）等の樹脂又は銅等の金属から形成されており、角筒状の概略形状を有した圧入筒２ａの後縁部から、図２に示すように、後方に向けて嵌合筒２ｂが延びている。嵌合筒２ｂは、圧入筒２ａよりも拡径された略円筒状を呈しており、外面及び内面をシール部３で覆われて、圧入部２とシール部３とを一体化している。圧入筒２ａの前面には、シール部３の挿通孔３２と連通する電線挿通孔２１が開口している。圧入筒２ａの左右の側壁には、略矩形状を呈して前後方向に延びて、電線挿通孔２１に連通した係止孔２２が開口している。   The press-fitting part 2 is formed from a resin such as PBT (polybutylene terephthalate) or a metal such as copper, and as shown in FIG. 2 from the rear edge part of the press-fitting cylinder 2a having a rectangular shape. The fitting cylinder 2b extends rearward. The fitting cylinder 2b has a substantially cylindrical shape whose diameter is larger than that of the press-fitting cylinder 2a. The outer surface and the inner surface are covered with the seal portion 3, and the press-fit portion 2 and the seal portion 3 are integrated. An electric wire insertion hole 21 communicating with the insertion hole 32 of the seal portion 3 is opened on the front surface of the press-fit cylinder 2a. On the left and right side walls of the press-fitted cylinder 2a, a locking hole 22 is formed which has a substantially rectangular shape and extends in the front-rear direction and communicates with the wire insertion hole 21.

図３（ａ）はゴム栓１の正面図，（ｂ）は端子金具５の背面図である。図３（ａ）に示すように圧入筒２ａの上下の高さをＨ２，左右の幅をＷ２、図３（ｂ）に示すように挟持片５３の上下の内壁面間の高さをＨ５，左右の内壁面間の幅をＷ５とすると、これらは、Ｈ２＜Ｈ５，Ｗ２＜Ｗ５，Ｗ５＜Ｈ２又はＨ５＜Ｗ２の関係を何れも満たすように設定されている。   FIG. 3A is a front view of the rubber plug 1 and FIG. 3B is a rear view of the terminal fitting 5. As shown in FIG. 3A, the vertical height of the press-fitting cylinder 2a is H2, the horizontal width is W2, and the height between the upper and lower inner wall surfaces of the clamping piece 53 is H5 as shown in FIG. Assuming that the width between the left and right inner wall surfaces is W5, these are set so as to satisfy the relationship of H2 <H5, W2 <W5, W5 <H2 or H5 <W2.

また、図１に示すように係止孔２２の上下の高さをＨ２２，図３（ｂ）に示すように係止片５６の上下の高さをＨ５６とすると、これらは、Ｈ５６＜Ｈ２２の関係を満たすように設定されている。これにより、圧入部２と挟持片５３との間に生じる間隙によりゴム栓１が挟持片５３内で周方向に回転しても、係止片５６が係止孔２２内に落ち込んで収容される。   Further, assuming that the vertical height of the locking hole 22 is H22 as shown in FIG. 1 and the vertical height of the locking piece 56 is H56 as shown in FIG. 3B, these are H56 <H22. It is set to satisfy the relationship. Thereby, even if the rubber plug 1 rotates in the circumferential direction in the clamping piece 53 due to the gap generated between the press-fit portion 2 and the clamping piece 53, the locking piece 56 falls into the locking hole 22 and is accommodated. .

次に、端子金具５へのゴム栓１の取付方法を説明する。ゴム栓１を端子金具５に取り付ける際には、図４（ａ）に示すように、端子金具５の挟持片５３に圧入部２を向かい合わせたゴム栓１を、図４（ｂ）に示すように挟持片５３内に押し込む。すると、図４（ｃ）に示すように、圧入部２の圧入筒２ａが端子金具５の挟持片５３に圧入される。圧入筒２ａを圧入された挟持片５３は、間隙５５を拡開させて圧入筒２ａを挟持し、これにより圧入筒２ａが挟持片５３に固定される。すると、挟持片５３の係止片５６は、圧入筒２ａの係止孔２２に落ち込んで収容される。挟持片５３の後端がシール部３の前面に当接すると、ゴム栓１の前方への移動が規制されて、圧入部２が挟持片５３に過度に挿入されるのが防止される。圧入筒２ａに挟持片５３から引き抜く力が作用すると、圧入筒２ａの係止孔２２に挟持片５３の係止片５６が係止されて、挟持片５３からの圧入筒２ａの抜け出しが規制される。   Next, a method for attaching the rubber plug 1 to the terminal fitting 5 will be described. When attaching the rubber plug 1 to the terminal fitting 5, as shown in FIG. 4 (a), the rubber plug 1 having the press-fit portion 2 facing the clamping piece 53 of the terminal fitting 5 is shown in FIG. 4 (b). So as to be pushed into the clamping piece 53. Then, as shown in FIG. 4C, the press-fitting cylinder 2 a of the press-fitting part 2 is press-fitted into the clamping piece 53 of the terminal fitting 5. The clamping piece 53 into which the press-fitting cylinder 2 a is press-fitted widens the gap 55 to clamp the press-fitting cylinder 2 a, and thereby the press-fitting cylinder 2 a is fixed to the clamping piece 53. Then, the locking piece 56 of the clamping piece 53 falls into the locking hole 22 of the press-fit cylinder 2a and is accommodated. When the rear end of the clamping piece 53 comes into contact with the front surface of the seal portion 3, the forward movement of the rubber plug 1 is restricted, and the press-fitting portion 2 is prevented from being excessively inserted into the clamping piece 53. When a force for pulling out from the clamping piece 53 acts on the press-fitting cylinder 2a, the locking piece 56 of the clamping piece 53 is locked in the locking hole 22 of the press-fitting cylinder 2a, and the withdrawal of the press-fitting cylinder 2a from the clamping piece 53 is restricted. The

本実施形態によれば、ゴム栓１を加締めずに、高い強度を持たせることのできる樹脂又は金属製の圧入筒２ａを介して端子金具５に取り付けることで、ゴム栓１の切れや加締め位置のばらつきが生じるのを防ぐことができる。この結果、シール機能の低下を抑え、ゴム栓１を用いた防水の信頼性を高めることができる。   According to the present embodiment, the rubber plug 1 can be cut or applied by attaching it to the terminal fitting 5 via the resin or metal press-fit cylinder 2a that can give high strength without crimping the rubber plug 1. It is possible to prevent variation in the tightening position. As a result, the deterioration of the sealing function can be suppressed and the reliability of waterproofing using the rubber plug 1 can be improved.

また、本実施形態によれば、金属製の挟持片５３が圧入部２を圧入されると、間隙５５を拡開させて弾発力を働かせ、圧入部２を包み込むように挟持するので、端子金具５とゴム栓１とを密着させて高いシール性を得られる。   Further, according to the present embodiment, when the metal clamping piece 53 is press-fitted into the press-fitting portion 2, the gap 55 is expanded to exert a resilient force so that the press-fitting portion 2 is wrapped so that the terminal The metal fitting 5 and the rubber plug 1 are brought into close contact with each other to obtain a high sealing property.

また、本実施形態によれば、端子金具５に接続された電線が端子金具５からの離脱方向に引っ張られると、挟持片５３の内方に屈曲した係止片５６が電線の被覆部に食い込んで、電線の離脱が規制される。このため、端子金具５の電線保持力を向上させることができる。特に、ワイヤバレル５２で十分に加締めるのが難しい極細電線等の電線保持力を効果的に高めることができる。   Further, according to the present embodiment, when the electric wire connected to the terminal fitting 5 is pulled in the direction away from the terminal fitting 5, the locking piece 56 bent inward of the holding piece 53 bites into the covering portion of the electric wire. Therefore, the detachment of the electric wire is regulated. For this reason, the electric wire holding force of the terminal metal fitting 5 can be improved. In particular, it is possible to effectively increase the holding power of a wire such as a very fine wire that is difficult to be sufficiently crimped with the wire barrel 52.

また、嵌合筒２ｂが縮閉及び拡開可能な開放端を備える構成の場合には、挿通孔３２に電線を挿通する際や、コネクタのキャビティにシール部３を挿入する際に外力が働くと、開放端を拡開又は縮閉させてゴム製のシール部３と共に嵌合筒２ｂが変形することから、これらの作業性を向上させることができる。また、圧入筒２ａの弾発力でシール性を高められる。   In the case where the fitting cylinder 2b has an open end that can be contracted and expanded, an external force is applied when the electric wire is inserted into the insertion hole 32 or when the seal portion 3 is inserted into the cavity of the connector. Since the open end is expanded or contracted and the fitting cylinder 2b is deformed together with the rubber seal portion 3, these workability can be improved. Further, the sealing performance can be enhanced by the elasticity of the press-fitting cylinder 2a.

なお、シール部３と圧入部２とを一体化する方法は任意である。例えば、加硫成形金型の成形キャビティ内に配置した圧入部２の接着表面（嵌合筒２ｂの表面）に加硫接着剤を塗布した後、成形キャビティ内にゴム組成物を注入してシール部３を加硫成形すると同時に、圧入部２とシール部３とを加硫接着してもよい。また、別体に形成されたシール部３及び圧入部２を固着させて一体化させてもよい。例えば、ゴム組成物を用いて予め形成されたシール部３の前面に開口した環状の嵌入溝に、圧入部２の嵌入筒２ｂを嵌入し、両者を固着して一体化させても、更に必要に応じてシール部３を接着させてもよい。   In addition, the method of integrating the seal part 3 and the press-fit part 2 is arbitrary. For example, after a vulcanized adhesive is applied to the adhesive surface (the surface of the fitting tube 2b) of the press-fit portion 2 disposed in the molding cavity of the vulcanization molding die, the rubber composition is injected into the molding cavity and sealed. At the same time that the portion 3 is vulcanized, the press-fit portion 2 and the seal portion 3 may be vulcanized and bonded. Alternatively, the seal part 3 and the press-fitting part 2 formed separately may be fixed and integrated. For example, it is further necessary to insert the fitting cylinder 2b of the press-fitting part 2 into an annular fitting groove opened on the front surface of the seal part 3 formed in advance using a rubber composition, and fix and integrate them together. Depending on the case, the seal portion 3 may be adhered.

また、挟持片５３の形状は、圧入された圧入部２を挟持できるのであれば任意であり、例えば、圧入部２が円筒状を呈しているのであれば、開放端を備える円筒状又は環状を呈していてもよい。また、挟持片５３の備える係止片５６及び圧入部２の係止孔２２の数量は任意であり、左右の側面だけでなく、下面や上面に備えられていても、また、一の側面に複数備えられていてもよい。   Further, the shape of the clamping piece 53 is arbitrary as long as the press-fitted portion 2 can be clamped. For example, if the press-fit portion 2 has a cylindrical shape, a cylindrical shape or an annular shape having an open end is provided. It may be presented. In addition, the number of the locking piece 56 provided in the clamping piece 53 and the locking hole 22 of the press-fitting portion 2 is arbitrary, and even if it is provided not only on the left and right side surfaces but also on the lower and upper surfaces, A plurality may be provided.

本発明の一実施形態の端子金具及びゴム栓の前方からの斜視図である。It is a perspective view from the front of the terminal metal fitting and rubber stopper of one embodiment of the present invention. 図１に示すゴム栓の縦断面図である。It is a longitudinal cross-sectional view of the rubber stopper shown in FIG. （ａ）はゴム栓の正面図，（ｂ）は端子金具の背面図である。(A) is a front view of a rubber stopper, (b) is a rear view of a terminal fitting. 端子金具へのゴム栓の取付方法を説明する図である。It is a figure explaining the attachment method of the rubber stopper to a terminal metal fitting.

符号の説明Explanation of symbols

１ ゴム栓
２ 圧入部
２ａ 圧入筒
２ｂ 嵌合筒
２１ 電線挿通孔
２２ 係止孔
３ シール部
３２ 挿通孔
５ 端子金具
５３ 挟持片
５６ 係止片 DESCRIPTION OF SYMBOLS 1 Rubber plug 2 Press-in part 2a Press-in cylinder 2b Fitting cylinder 21 Electric wire insertion hole 22 Locking hole 3 Sealing part 32 Insertion hole 5 Terminal metal fitting 53 Holding piece 56 Locking piece

Claims (1)

端子金具へ取り付けられるゴム栓であって、
前記端子金具に設けられた狭持片に圧入されて狭持される樹脂又は金属製の圧入部を備え、
前記圧入部は、樹脂又は金属から形成された圧入筒と、該圧入筒から拡径して延び外面及び内面をシール部で覆われた嵌合筒と、
前記狭持片の左右の両側壁にコの字の切り抜きを設けてワイヤバレルで加締められた電線の外周に前端を当接させるまで前記狭持片の内方に屈曲させて前方に延びた前記狭持片の舌片により、前記狭持片に前記圧入部が圧入された前記端子金具と前記圧入部とが係止される係止手段と、
を備えた取付構造を有することを特徴とするゴム栓。 A rubber plug that can be attached to the terminal fitting,
A resin or metal press-fitting part that is press-fitted into a pinching piece provided on the terminal metal fitting,
The press-fit portion includes a press-fit tube formed of resin or metal, and a fitting cylinder to extend beauty outside surface and the inner surface is covered with the sealing portion diametrically enlarged from the piezoelectric inlet tube,
The left and right side walls of the holding piece were provided with U-shaped cutouts and bent forward inwardly until the front end was brought into contact with the outer periphery of the electric wire crimped by the wire barrel. Locking means for locking the terminal fitting in which the press-fitting part is press-fitted into the holding piece and the press-fitting part by the tongue piece of the pinching piece,
A rubber plug, characterized by having a mounting structure.

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