JPH0753375Y2 - Conduit fittings - Google Patents
Conduit fittingsInfo
- Publication number
- JPH0753375Y2 JPH0753375Y2 JP1988163319U JP16331988U JPH0753375Y2 JP H0753375 Y2 JPH0753375 Y2 JP H0753375Y2 JP 1988163319 U JP1988163319 U JP 1988163319U JP 16331988 U JP16331988 U JP 16331988U JP H0753375 Y2 JPH0753375 Y2 JP H0753375Y2
- Authority
- JP
- Japan
- Prior art keywords
- tightening nut
- conduit
- joint
- seal body
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Joints With Pressure Members (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、電線管用継手に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a conduit joint.
［従来の技術］ 電線管をリミットスイッチなどの固定構造体に接続する
ための継手として、継手本体を固定構造体に取り付けた
後、この継手本体に予め締付ナットおよびゴムシールを
挿通した電線管の一端を挿入し、次いで締付ナットを締
め付けることにより、継手本体の一端面およびこれと対
峙する締付ナットの面との間に配置されるゴムシールを
圧縮し、このシールが管芯方向に膨出して電線管の外周
面を押圧することにより電線管を水密的に接続する構成
が知られる。[Prior Art] As a joint for connecting a conduit to a fixed structure such as a limit switch, after fitting the joint body to the fixed structure, a conduit tube in which a tightening nut and a rubber seal have been previously inserted into the joint body By inserting one end and then tightening the tightening nut, the rubber seal placed between the one end face of the joint body and the face of the tightening nut facing it is compressed, and this seal bulges in the pipe core direction. There is known a configuration in which the electric wires are connected in a watertight manner by pressing the outer peripheral surface of the electric wires.
［考案が解決しようとする課題］ ところで、このような継手においては、シール自体の素
材、即ちゴムの性質に起因して、シールが経時的に劣化
し、その弾性を失って防水の用をなさなくなるという問
題を有する。[Problems to be Solved by the Invention] By the way, in such a joint, due to the material of the seal itself, that is, the property of rubber, the seal deteriorates with time, loses its elasticity, and is not waterproof. It has the problem of disappearing.
そのため、本考案は、経時的な劣化が少なく且つ長期に
わたり防水効果を維持することの可能な電線管用継手を
簡単な構造で提供することを目的とする。Therefore, an object of the present invention is to provide a conduit tube joint with a simple structure that is less likely to deteriorate with time and can maintain a waterproof effect for a long period of time.
［課題を解決するための手段］ このため、本考案による電線管用継手は、外周に合成樹
脂被覆層を有する電線管の一端部を内部に受ける継手本
体と、電線管の一端に螺着される中リングと、電線管を
挿通する開口を有し且つ前記継手本体に螺合する締付ナ
ットと、締付ナットの内端面と前記継手本体の一端面と
の間に配置された防水シール体とを有する電線管用継手
において、前記シール体が合成樹脂材料により作製さ
れ、半径方向外方に突出する環状当り片と、当り片から
幅方向にくさび状に延びた環状傾斜片と、電線管の被覆
層に当接する面に形成された環状凹部とを有する環状の
一部が切断された断面略三角形状のシール体よりなり、
前記締付ナットがその開口の内周面が前記シール体の傾
斜片の外面と相補する角度の環状傾斜面を有し、前記締
付ナットを前記継手本体に締め付けることにより前記シ
ール体の環状当り片を継手本体および締付ナットの内端
面に圧接させると共に、前記シール体の環状傾斜片の一
縁を前記締付ナットの開口と電線管の被覆層との隙間に
圧入し、該隙間を密封することを特徴とする。[Means for Solving the Problem] For this reason, the conduit joint according to the present invention is screwed to one end of the conduit body and the joint body for internally receiving one end of the conduit having the synthetic resin coating layer on the outer periphery thereof. A middle ring, a tightening nut that has an opening for inserting a conduit and is screwed into the joint body, and a waterproof seal body arranged between an inner end surface of the tightening nut and one end surface of the joint body. In a joint for a conduit tube, the sealing body is made of a synthetic resin material, the annular contact piece protruding outward in the radial direction, the annular inclined piece extending in a width direction from the contact piece, and the conduit tube coating. A ring-shaped part having a ring-shaped recess formed in the surface abutting on the layer is formed by cutting a seal body having a substantially triangular cross section,
An inner peripheral surface of the opening of the tightening nut has an annular inclined surface having an angle complementary to the outer surface of the inclined piece of the seal body, and the annular contact of the seal body is obtained by tightening the tightening nut on the joint body. The piece is pressed against the inner end surface of the joint body and the tightening nut, and one edge of the annular inclined piece of the seal body is press-fitted into the gap between the opening of the tightening nut and the covering layer of the electric wire tube to seal the gap. It is characterized by doing.
［作用］ このような手段により、締付ナットを継手本体に締め付
けることによりシール体を電線管の外周面および継手本
体の端面に圧接させると共に、シール体の一縁を前記締
付ナットの開口と電線管表面との間の隙間に圧入し、該
隙間を水密的に密封する。[Operation] By tightening the tightening nut on the joint body by such means, the seal body is brought into pressure contact with the outer peripheral surface of the conduit and the end surface of the joint body, and one edge of the seal body serves as the opening of the tightening nut. It is press-fitted into a gap with the surface of the conduit, and the gap is watertightly sealed.
［実施例］ 以下、図面を参照として本考案を説明する。本考案によ
る継手は、外表面が比較的平滑な電線管の接続に適して
おり、特には外表面に軟質合成樹脂からなる被覆層を設
けた電線管の接続に適している。[Embodiment] Hereinafter, the present invention will be described with reference to the drawings. INDUSTRIAL APPLICABILITY The joint according to the present invention is suitable for connecting an electric wire tube having an outer surface relatively smooth, and particularly for connecting an electric wire tube having a coating layer made of a soft synthetic resin on the outer surface.
第１図において、電線管１は、薄肉ウェブを螺旋状に巻
回して形成した金属可撓管の外表面に軟質合成樹脂被覆
層を有する構造よりなる。継手２は、継手本体３、締付
ナット４、シール体５および中リング６を有する。In FIG. 1, a conduit 1 has a structure in which a soft synthetic resin coating layer is provided on the outer surface of a metal flexible tube formed by spirally winding a thin web. The joint 2 has a joint body 3, a tightening nut 4, a seal body 5, and an intermediate ring 6.
締付ナット４は、電線管１の外径よりも僅かに大きい径
の開口７を形成する端壁部分８と、電線管１の外径より
大きな内径を有するフランジ部９とにより構成される袋
状体であり、フランジ部９は、その内周面に雌ネジが設
けられ、外周部にはナット状の締付部が形成される。開
口７の内周面、即ち端壁部分８の内周面は電線管の挿入
方向に広がった環状傾斜面8aを形成し、傾斜面は後述す
るシール体５の傾斜片の外面とほぼ相補する角度を有す
る。The tightening nut 4 is a bag including an end wall portion 8 forming an opening 7 having a diameter slightly larger than the outer diameter of the electric wire tube 1, and a flange portion 9 having an inner diameter larger than the outer diameter of the electric wire tube 1. The flange portion 9 has a female thread on its inner peripheral surface and a nut-shaped tightening portion on its outer peripheral portion. The inner peripheral surface of the opening 7, that is, the inner peripheral surface of the end wall portion 8 forms an annular inclined surface 8a that widens in the insertion direction of the conduit, and the inclined surface is substantially complementary to the outer surface of the inclined piece of the seal body 5 described later. Have an angle.
継手本体３は、締付ナット４の雌ネジと螺合する雄ネジ
を外周に有する第１の筒11と、リミットスイッチなどの
他の固定構造体と螺合する雄ネジを外周に有し且つ第１
の筒11と一体に成形された第２の筒12とからなる中空体
であり、その外表面にはナット状の締付部が形成され
る。第１の筒11の内周面と第２の筒の内周面との間には
段部が形成され、電線管はこの段部に端部が位置するよ
うに第１の筒11内に挿入される。第１の筒11の端部は端
面側に向かって広がった環状傾斜面11aを形成してい
る。The joint body 3 has a first cylinder 11 having an external thread on its outer periphery that is screwed with the female thread of the tightening nut 4, and an external thread having an external thread that is screwed onto another fixed structure such as a limit switch. First
It is a hollow body composed of the cylinder 11 and a second cylinder 12 formed integrally with the same, and a nut-shaped tightening portion is formed on the outer surface thereof. A step is formed between the inner peripheral surface of the first cylinder 11 and the inner peripheral surface of the second cylinder, and the conduit is placed in the first cylinder 11 so that the end is located at this step. Is inserted. The end of the first cylinder 11 forms an annular inclined surface 11a that widens toward the end surface side.
中リング６は、薄厚の金属板をプレス加工して二重の筒
状に形成され、電線管の合成樹脂被覆層の外表面を覆う
外筒6aと、電線管１の内表面の螺旋部1aと係合する螺旋
状凸部を端縁に形成した内筒6bとを一体に形成してな
る。外筒6aは継手本体３の第１の筒11とほぼ同じ長さを
有し、その先端部は第１の筒11の環状傾斜面11aと相補
するようにそれとほぼ平行に半径方向外側に広がって傾
斜している。中リング６は、内筒6bの螺旋状凸部を電線
管１の内表面に螺着させて電線管１に固定され、外筒6a
を継手本体３に接して電線管本体の接地を可能としてい
る。中リング６は又、電線管の軸方向の引っ張りに対し
シール体に当接することにより継手からの抜け落ちを防
止するように作用する。The middle ring 6 is formed by pressing a thin metal plate into a double cylinder shape, and an outer cylinder 6a that covers the outer surface of the synthetic resin coating layer of the conduit and a spiral portion 1a on the inner surface of the conduit 1. And an inner cylinder (6b) having a spiral convex portion formed on the edge thereof to be engaged with. The outer cylinder 6a has substantially the same length as the first cylinder 11 of the joint body 3, and its tip end extends radially outward in parallel with the annular inclined surface 11a of the first cylinder 11 so as to be complementary thereto. Is inclined. The middle ring 6 is fixed to the electric wire tube 1 by screwing the spiral convex portion of the inner tube 6b onto the inner surface of the electric wire tube 1, and the outer tube 6a.
Is connected to the joint body 3 to enable the conduit body to be grounded. The middle ring 6 also acts so as to prevent the conduit from coming off from the joint by abutting the seal body against the axial tension of the conduit.
シール体５は、締付ナット４を継手本体３に螺合し締め
付けたときに、それに圧せられて強制的に変形し得る程
度の適度の軟性を有する合成樹脂により作製され、第２
図に示すように、環状の１ケ所15で切断された断面略三
角形状（第２図（ｃ））のリングよりなり、電線管１を
挿通して継手本体３の第１の筒11の端面およびこれと対
峙する締付ナットの内端面4aとの間に配置される。切断
形状は、例えば第２図（ａ）に示すようにくの字状であ
ることが好ましい。シール体５は、限定されないが、こ
の例では電線管の外径よりも僅かに大きい内径を有す
る。シール体５は半径方向外方に突出する断面方形の環
状当り片5aと、この当り片から幅方向外方にくさび状に
延びる先端が薄肉の環状傾斜片5bとを有し、当り片5aの
一方の側面が第１の筒11の端面および／または中リング
の端部に圧接すると共に、他方の側面が締付ナットの内
端面4aに圧接する。また前記したように、締付ナットの
開口７の内周面はシール体５の傾斜片5bの外面即ち上面
と相補する角度の環状斜面8aを形成しており、締付ナッ
ト４を継手本体３に締め付けた時に傾斜片5bの外面が環
状傾斜面8aに圧接し且つその縁部が締付ナットの開口７
と電線管の被覆層との間の隙間に圧入され、この隙間を
水密的に密封する。また、他方の傾斜片は中リング６の
傾斜した内周面に圧接する。The seal body 5 is made of synthetic resin having an appropriate degree of flexibility such that it can be pressed and deformed by force when the tightening nut 4 is screwed into the joint body 3 and tightened.
As shown in the figure, it is composed of a ring having a substantially triangular cross section (Fig. 2 (c)) cut at one annular location 15, and the end face of the first tube 11 of the joint body 3 is inserted through the conduit 1. And between the inner end surface 4a of the tightening nut and the inner end surface 4a of the tightening nut. The cutting shape is preferably a dogleg shape as shown in FIG. 2 (a), for example. Although not limited, the seal body 5 has an inner diameter slightly larger than the outer diameter of the conduit in this example. The seal body 5 has an annular contact piece 5a having a rectangular cross section that protrudes outward in the radial direction, and an annular inclined piece 5b having a thin tip extending in a wedge shape outward in the width direction from the contact piece. One side surface is pressed against the end surface of the first cylinder 11 and / or the end portion of the middle ring, and the other side surface is pressed against the inner end surface 4a of the tightening nut. Further, as described above, the inner peripheral surface of the opening 7 of the tightening nut is formed with the annular inclined surface 8a having an angle complementary to the outer surface, that is, the upper surface of the inclined piece 5b of the seal body 5, and the tightening nut 4 is attached to the joint main body 3 The outer surface of the inclined piece 5b is in pressure contact with the annular inclined surface 8a when tightened to and the edge of the inclined piece 5b is opened by the opening 7 of the tightening nut.
Is press-fitted into a gap between the wire and the coating layer of the conduit, and the gap is watertightly sealed. The other inclined piece is pressed against the inclined inner peripheral surface of the middle ring 6.
一方、第２図に示すように、シール体５の被覆層と接す
る面には環状の凹部5cが形成され、締付ナットの締め付
けに伴いシール体５が半径方向内方に縮径して被覆層を
締め付け、この結果、傾斜片5bの下端が被覆層に食い込
み且つ凹部5cに対応する被覆層が盛り上がってこの凹部
5cに喰い込み、電線管の軸方向の引っ張りに対し対抗す
る。この凹部は、傾斜片5bの縁部の半径方向（第２図
（ｃ）でみて上下方向）の可撓性を向上させる働きをも
有する。尚、締め付けによるシール体の縮径において、
シール体の切断部はその両端面が互いに対して隙間なく
圧接し連続する。尚、切断部がくの字状に切断されたシ
ール体の場合、切断面間の噛み合いが確実で且つ横方向
へのずれ等が防止される。On the other hand, as shown in FIG. 2, an annular recess 5c is formed on the surface of the seal body 5 which is in contact with the coating layer, and the seal body 5 is radially inwardly contracted as the tightening nut is tightened. The layers are tightened, and as a result, the lower end of the inclined piece 5b digs into the coating layer and the coating layer corresponding to the recess 5c rises to form this recess.
It bites into 5c and counters the axial pull of the conduit. The recess also has a function of improving the flexibility of the edge portion of the inclined piece 5b in the radial direction (vertical direction when viewed in FIG. 2 (c)). In addition, in reducing the diameter of the seal body by tightening,
Both ends of the cut portion of the seal body are in pressure contact with each other without a gap and are continuous. In addition, in the case of the seal body in which the cut portion is cut in a dogleg shape, the meshing between the cut surfaces is sure and the shift in the lateral direction is prevented.
第３図はシール体５の第２図に示した例とは別の形状を
示す例である。第２図のシール体５はほぼ方形の凹部5c
を有し、その傾斜片5bは略三角断面を有しているのに対
し、第３図に示す例では、シール体５に代わるシール体
50は、傾斜片50bの外面とほぼ平行に傾斜した内面を有
する略台形形状の凹部50cを有しており、この凹部50cに
より傾斜片50bが全体的に薄肉状に形成されている。こ
のようなシール体50にあっては、締付ナット４を継手本
体３に螺合し締め付けたときに、傾斜片50bが半径方向
に更に変形し易くなると共に凹部50cへの電線管の被膜
層の喰い込みが第２図のシール体の場合に較べてより効
率的に行われる。FIG. 3 is an example showing a shape of the seal body 5 which is different from the example shown in FIG. The seal body 5 in FIG. 2 has a substantially rectangular recess 5c.
While the inclined piece 5b has a substantially triangular cross section, in the example shown in FIG.
The 50 has a substantially trapezoidal concave portion 50c having an inner surface inclined substantially parallel to the outer surface of the inclined piece 50b, and the inclined piece 50b is formed in a generally thin shape by the concave portion 50c. In such a seal body 50, when the tightening nut 4 is screwed into the joint body 3 and tightened, the inclined piece 50b is more likely to be deformed in the radial direction, and the coating layer of the conduit on the recess 50c is formed. The biting is performed more efficiently than in the case of the seal body shown in FIG.
次に、継手２の取付方法について述べる。締付ナット３
の開口７に電線管１およびシール体５を通し、中リング
６を電線管１の端部に螺着する。シール体５は前記した
ように環状の一部で切断されて半径方向外方に広がり得
るように構成されているため、電線管の挿通を容易に行
なうことができる。次いで、中リング６を継手本体３の
第１の筒11の内部に位置させ、締付ナット４を継手本体
３に螺着させ、シール体５を前述した各部分に圧接し且
つ圧入する。Next, a method of mounting the joint 2 will be described. Tightening nut 3
The conduit 1 and the seal body 5 are passed through the opening 7 of the above, and the middle ring 6 is screwed to the end of the conduit 1. As described above, the seal body 5 is configured to be cut by a part of the annular shape so as to be able to expand outward in the radial direction, so that the conduit tube can be easily inserted. Next, the middle ring 6 is positioned inside the first cylinder 11 of the joint body 3, the tightening nut 4 is screwed onto the joint body 3, and the seal body 5 is pressed and pressed into each of the above-mentioned portions.
上記した例では、中リングを二重構造として電線管の内
面に螺合する構成としたが、例えば実公昭59-43891号公
報に開示するように、電線管の端部近くの被覆層の一部
を剥して外周面を露出し、この外周面に螺着するよう
に、雌ネジを内周面に備えた筒状の一重の構造としても
良く、また場合に応じて中リングを省略した構成とする
こともできる。In the above example, the inner ring has a double structure and is screwed onto the inner surface of the conduit. However, as disclosed in, for example, Japanese Utility Model Publication No. 59-43891, one of the coating layers near the end of the conduit is formed. It may have a cylindrical single-layer structure with a female screw on the inner peripheral surface so that the outer peripheral surface is exposed by peeling off the part and screwed onto this outer peripheral surface, and in some cases the middle ring is omitted. Can also be
［考案の効果］ 以上の構成により、本考案によればシール体の経時的劣
化がほとんどなく、かかるシール体およびこれと協働す
る継手本体、締付ナットの構造により長期にわたる防水
効果を得ることができる。[Effects of the Invention] With the above configuration, according to the present invention, the sealing body hardly deteriorates with time, and a long-term waterproofing effect can be obtained by the structure of the sealing body, the joint body and the tightening nut that cooperate with the sealing body. You can
第１図は本考案による継手の一例を示す一部断面側面
図、第２図（ａ）（ｂ）（ｃ）はそれぞれそのシール体
を示す側面図、正面図および線11-11で切断した断面
図、第３図（ａ）（ｂ）（ｃ）は第２図で示したシール
体とは別の例を示す側面側、正面図および線III-IIIで
切断した断面図である。 １……電線管、２……継手、３……継手本体、４……締
付ナット、５、50……シール体、5a、50a……当り片、5
b、50b……傾斜片、5c、50c……凹部。FIG. 1 is a partial cross-sectional side view showing an example of a joint according to the present invention, and FIGS. 2 (a), (b) and (c) are side views showing the sealing body, a front view and a line 11-11, respectively. Sectional views, FIGS. 3 (a), (b), and (c) are a side view, a front view, and a cross-sectional view taken along line III-III showing another example different from the sealing body shown in FIG. 1 ... conduit, 2 ... fitting, 3 ... fitting body, 4 ... tightening nut, 5, 50 ... sealing body, 5a, 50a ... hit piece, 5
b, 50b ... Inclined piece, 5c, 50c ... recessed part.
Claims (1)
端部を内部に受ける継手本体と、電線管の一端に螺着さ
れる中リングと、電線管を挿通する開口を有し且つ前記
継手本体に螺合する締付ナットと、締付ナットの内端面
と前記継手本体の一端面との間に配置された防水シール
体とを有する電線管用継手において、前記シール体が合
成樹脂材料により作製され、半径方向外方に突出する環
状当り片と、当り片から幅方向にくさび状に延びた環状
傾斜片と、電線管の被覆層に当接する面に形成された環
状凹部とを有する環状の一部が切断された断面略三角形
状のシール体よりなり、前記締付ナットがその開口の内
周面が前記シール体の傾斜片の外面と相補する角度の環
状傾斜面を有し、前記締付ナットを前記継手本体に締め
付けることにより前記シール体の環状当り片を継手本体
および締付ナットの内端面に圧接させると共に、前記シ
ール体の環状傾斜片の一縁を前記締付ナットの開口と電
線管の被覆層との隙間に圧入し、該隙間を密封すること
を特徴とする電線管用継手。1. A joint main body for receiving one end of an electric wire tube having a synthetic resin coating layer on its outer periphery, a middle ring screwed to one end of the electric wire tube, and an opening for inserting the electric wire tube. In a conduit joint having a tightening nut screwed into the joint body and a waterproof seal body arranged between the inner end surface of the tightening nut and the one end surface of the joint body, the seal body is made of a synthetic resin material. A ring having an annular contact piece that is formed and protrudes outward in the radial direction, an annular inclined piece that extends from the contact piece in a wedge shape in the width direction, and an annular recessed portion that is formed on the surface that abuts the covering layer of the conduit. Of the seal body having a substantially triangular cross-section, a part of which is cut, and the tightening nut has an annular inclined surface whose inner peripheral surface has an angle complementary to the outer surface of the inclined piece of the seal body, By tightening the tightening nut on the joint body The annular contact piece of the seal body is pressed against the joint body and the inner end surface of the tightening nut, and one edge of the annular inclined piece of the seal body is pressed into the gap between the opening of the tightening nut and the covering layer of the conduit tube. Then, the conduit joint is characterized in that the gap is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988163319U JPH0753375Y2 (en) | 1988-06-30 | 1988-12-16 | Conduit fittings |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8715788 | 1988-06-30 | ||
| JP63-87157 | 1988-06-30 | ||
| JP1988163319U JPH0753375Y2 (en) | 1988-06-30 | 1988-12-16 | Conduit fittings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0260420U JPH0260420U (en) | 1990-05-02 |
| JPH0753375Y2 true JPH0753375Y2 (en) | 1995-12-06 |
Family
ID=31718614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988163319U Expired - Fee Related JPH0753375Y2 (en) | 1988-06-30 | 1988-12-16 | Conduit fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753375Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS529036Y2 (en) * | 1971-03-05 | 1977-02-25 | ||
| JPS62110685U (en) * | 1985-12-27 | 1987-07-14 |
-
1988
- 1988-12-16 JP JP1988163319U patent/JPH0753375Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0260420U (en) | 1990-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |