JP2021071164A - Insulation joint - Google Patents

Insulation joint Download PDF

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JP2021071164A
JP2021071164A JP2019198110A JP2019198110A JP2021071164A JP 2021071164 A JP2021071164 A JP 2021071164A JP 2019198110 A JP2019198110 A JP 2019198110A JP 2019198110 A JP2019198110 A JP 2019198110A JP 2021071164 A JP2021071164 A JP 2021071164A
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joint
joint body
insulating
bag nut
insulating member
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JP7340851B2 (en
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康志 金子
Koji Kaneko
康志 金子
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TAIHEIYO TOKUSHU CHUZO KK
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TAIHEIYO TOKUSHU CHUZO KK
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Abstract

To provide an insulation joint which reduces components, is easy to be assembled, reduces cost of manufacture and is hard to be damaged.SOLUTION: In a joint body (2), a flange part (17) whose diameter is expanded is formed in its end portion, and a cap nut (13) is inserted from an opening whose diameter is larger than that of the flange part (17) into the joint body (2) by forming the opening in its head portion. An insulation member (14) is formed in a ring shape which is cut partially. An annular groove part (23) is formed on an inner peripheral surface of the cap nut (13), and the insulation member (14) is accommodated in the annular groove part (14). When sliding the cap nut (13), an end face of the insulation member (14) is brought into surface contact with an end face (18) of the flange part (17) and locked, such that the cap nut (13) is prevented from being pulled out of the joint body (2). The insulation member (14) is formed in such a manner that the cross-sectional shape is made rectangular, and a wall surface (24) of the annular groove part (14) and the end face (18) of the flange part (17) are formed in a vertical surface with respect to an axis of the joint body (2).SELECTED DRAWING: Figure 1

Description

本発明は、継手本体と袋ナットとを備え埋設給水配管等に接続されるようになっている継手であって、継手本体と袋ナットとが異種金属からなり、これらが絶縁されて腐食が防止されるようになっている絶縁継手に関するものである。 The present invention is a joint provided with a joint body and a bag nut and connected to a buried water supply pipe or the like. The joint body and the bag nut are made of dissimilar metals, and these are insulated to prevent corrosion. It relates to an insulating joint that has been made to be used.

浄水場、配水場等から供給される上水は配水管によって配水され、配水管からサドル付分水栓を介して分岐している給水管によって各住宅に供給されるようになっている。サドル付分水栓と給水管は継手を介して接続されているが、給水管には、止水栓や水道メータ等が介装されこれらと給水管も必要により継手によって接続されている。継手は継手本体と、継手本体に設けられている袋ナットとを備えており、例えばサドル分水栓のボールケース分水口に袋ナットを締め付けると、サドル分水栓に継手を接続できるようになっている。ところで継手本体は鋳鉄、ステンレス等から形成されている一方で、袋ナットは異種金属である青銅等から形成されている。周知のように金属には固有の電位があり、異種金属同士が接触していると電位差が生じて腐食の原因になる。給水管は湿った土中に埋設されているので継手は腐食が進行しやすい。そこで、継手本体と袋ナットの間に樹脂等の絶縁体からなるいわゆる止め線が設けられ、異種金属同士の接触が防止されて腐食しにくくなっている絶縁継手が提供されている。 The clean water supplied from water purification plants, water distribution plants, etc. is distributed by water distribution pipes, and is supplied to each house by water supply pipes that branch from the water distribution pipes via a diversion faucet with a saddle. The water faucet with saddle and the water supply pipe are connected via a joint. The water supply pipe is provided with a water stopcock, a water meter, etc., and the water supply pipe is also connected by a joint if necessary. The joint is equipped with a joint body and a bag nut provided on the joint body. For example, if the bag nut is tightened to the ball case diversion port of the saddle diversion faucet, the joint can be connected to the saddle diversion faucet. ing. By the way, the joint body is made of cast iron, stainless steel, etc., while the bag nut is made of bronze, which is a dissimilar metal. As is well known, metals have an inherent potential, and when dissimilar metals are in contact with each other, a potential difference is generated, which causes corrosion. Since the water supply pipe is buried in moist soil, the joints are prone to corrosion. Therefore, there is provided an insulating joint in which a so-called stop wire made of an insulator such as resin is provided between the joint body and the bag nut to prevent contact between dissimilar metals and prevent corrosion.

絶縁継手は、継手本体と袋ナットの間に絶縁体からなる止め線が設けられているが、その構造は複雑になっているので製造コストが若干大きくなっている。これは、継手本体から袋ナットが抜けないように、継手本体の端面には拡径したフランジ部を形成する必要があると共に、この継手本体と袋ナットの間に環状の止め線を設ける必要があるからである。そこで一般的な絶縁継手において、継手本体はフランジ部と本体部とを別部品から形成するようにし、フランジ部には雄ネジを、本体部には雌ネジを形成している。絶縁継手の組立は、まず継手本体の本体部に袋ナットを挿入し、引き続いて止め線を挿入する。そして最後にフランジ部を本体部に螺合させるようにして絶縁継手を組み立てる。このように組み立てるとフランジ部と本体部とからなる継手本体と、袋ナットとの間に絶縁体である止め線が介在されることになるが、確実に絶縁されるよう止め線のずれを防止する所定の部品を設ける場合もある。このように継手本体は2部品以上から構成しなければならないし、組立に手間がかかるので、製造コストが若干大きくなっている。 Insulated joints are provided with a stop wire made of an insulator between the joint body and the cap nut, but the manufacturing cost is slightly higher because the structure is complicated. This is because it is necessary to form an enlarged flange portion on the end face of the joint body so that the bag nut does not come off from the joint body, and it is necessary to provide an annular stop wire between the joint body and the bag nut. Because there is. Therefore, in a general insulated joint, the flange portion and the main body portion of the joint main body are formed from separate parts, and a male screw is formed on the flange portion and a female screw is formed on the main body portion. To assemble an insulated joint, first insert a bag nut into the main body of the joint body, and then insert a stop wire. Finally, the insulating joint is assembled by screwing the flange portion into the main body portion. When assembled in this way, a stop wire, which is an insulator, is interposed between the joint body consisting of the flange part and the main body part and the bag nut, but the stop wire is prevented from slipping to ensure insulation. In some cases, a predetermined part is provided. As described above, the joint body must be composed of two or more parts, and it takes time and effort to assemble, so that the manufacturing cost is slightly high.

特開2008−248983号公報Japanese Unexamined Patent Publication No. 2008-248983

特許文献1には、継手本体を単一の部品から構成し、従って部品点数が少なく製造コストが小さい絶縁継手が提案されている。特許文献1に記載の絶縁継手50は、図4の(A)に示されているように、単一の部品からなる継手本体51と、この継手本体51に設けられている袋ナット53と、これらの間に設けられている絶縁部材54とから構成されている。継手本体51の端面にはフランジ部55が形成されているが、このフランジ部55の径は、袋ナット53の最小の径の部分よりも小さい。従って袋ナット53はフランジ部55によって妨げられることなく、継手本体51の胴部58に挿入したり継手本体51から取り外ししたりできるようになっている。絶縁部材54はポリアセタール等の樹脂からなり、図4の(B)に示されているように、割リング状に形成されている。絶縁部材54の内径はフランジ部55の外径より小さいが、割リングを広げれば継手本体51に装着することができる。袋ナット53の内周面には絶縁部材54を収納するための環状の段部57が形成されている。この絶縁継手51は次のようにして組み立てられる。まず、袋ナット53を胴部58に達するまで継手本体51に挿入する。次いで、絶縁部材54を押し広げながら継手本体51のフランジ部55から挿入する。胴部58において絶縁部材54を袋ナット53の段部57に嵌め込む。絶縁部材54が嵌め込まれた袋ナット53は、絶縁部材54の分だけ内径が小さくなる。これによって袋ナット53のフランジ部55からの抜けが防止されている。なお、袋ナット53に嵌め込まれた絶縁部材54には、図4の(C)に示されているように、第1のテーパ面60、第2のテーパ面61が形成されており、袋ナット53を抜こうとすると、第1のテーパ面60に袋ナット53の段部57のテーパ面が面接触し、そして第2のテーパ面61に継手本体51のフランジ部55のテーパ面が面接触することになる。特許文献1によると、これら第1、2のテーパ面60、61は、絶縁継手50の軸に対して45度〜80度、より好ましくは60度±10度になるように傾斜している。このように第1、2のテーパ面60、61を傾斜させているのは、袋ナット53に抜に方向の力が作用するとき、矢印64、65で示されているように継手本体51のフランジ部55と袋ナット53とから力が作用することになるが、それによって生じるせん断力で絶縁部材54が破壊されないようにするためである。 Patent Document 1 proposes an insulated joint in which the joint body is composed of a single component, and therefore the number of components is small and the manufacturing cost is low. As shown in FIG. 4A, the insulated joint 50 described in Patent Document 1 includes a joint main body 51 composed of a single component, a bag nut 53 provided on the joint main body 51, and a bag nut 53. It is composed of an insulating member 54 provided between them. A flange portion 55 is formed on the end surface of the joint body 51, and the diameter of the flange portion 55 is smaller than the minimum diameter portion of the bag nut 53. Therefore, the bag nut 53 can be inserted into or removed from the body portion 58 of the joint body 51 without being hindered by the flange portion 55. The insulating member 54 is made of a resin such as polyacetal, and is formed in a split ring shape as shown in FIG. 4B. Although the inner diameter of the insulating member 54 is smaller than the outer diameter of the flange portion 55, it can be attached to the joint body 51 by expanding the split ring. An annular step portion 57 for accommodating the insulating member 54 is formed on the inner peripheral surface of the bag nut 53. The insulating joint 51 is assembled as follows. First, the bag nut 53 is inserted into the joint body 51 until it reaches the body portion 58. Next, the insulating member 54 is pushed open and inserted from the flange portion 55 of the joint body 51. In the body portion 58, the insulating member 54 is fitted into the step portion 57 of the bag nut 53. The inner diameter of the bag nut 53 into which the insulating member 54 is fitted is reduced by the amount of the insulating member 54. This prevents the bag nut 53 from coming off from the flange portion 55. As shown in FIG. 4C, the insulating member 54 fitted in the bag nut 53 is formed with a first tapered surface 60 and a second tapered surface 61, and the bag nut. When trying to pull out 53, the tapered surface of the stepped portion 57 of the bag nut 53 comes into surface contact with the first tapered surface 60, and the tapered surface of the flange portion 55 of the joint body 51 comes into surface contact with the second tapered surface 61. Will be done. According to Patent Document 1, these first and second tapered surfaces 60 and 61 are inclined so as to be 45 to 80 degrees, more preferably 60 degrees ± 10 degrees with respect to the axis of the insulating joint 50. The reason why the first and second tapered surfaces 60 and 61 are inclined in this way is that when a force in the pulling direction acts on the cap nut 53, the joint body 51 is shown by arrows 64 and 65. A force acts from the flange portion 55 and the cap nut 53, but this is to prevent the insulating member 54 from being destroyed by the shearing force generated by the force.

特許文献1に記載の絶縁継手は、部品点数が少なく組立も容易である。従って製造コストは小さく優れていると言える。しかしながら解決すべき課題も見受けられる。具体的には、2点の課題が見受けられる。第1の課題は、袋ナット53の絶縁本体51からの抜けの可能性が若干残っている点である。前記したように第1、2のテーパ面60、61に袋ナット53やフランジ部55の所定の面が面接触するので袋ナット53は継手本体51から抜けにくくはなっている。しかしながら、第1、2のテーパ面60、61は傾斜しているので、強い力が作用して絶縁部材54が変形すると、袋ナット53やフランジ部55の所定の面が第1、2のテーパ面60、61を滑って袋ナット53が抜け落ちる可能性がある。さらには絶縁部材54が割リング状に形成されていることによっても抜けが発生し易くなっている。割リング状に形成されているので、絶縁部材54に、図4の(B)において矢印67、68で示されているようが偶力が作用すると、ねじれが生じる。絶縁部材54にねじれが生じると、図4の(C)において示されている矢印64、65の力は、円周上の一部に偏って集中し、その部分から抜けが発生し易いからである。第2の課題は、絶縁部材54の耐久性、つまり破断に対する耐性についてである。絶縁部材54は矢印64、65の力が作用するとせん断力が作用するが、図4の(C)において符号70、71の箇所において応力集中し易くなっている。すなわち、絶縁部材54はこの部分から破断する可能性がある。 The insulated joint described in Patent Document 1 has a small number of parts and is easy to assemble. Therefore, it can be said that the manufacturing cost is small and excellent. However, there are some issues that need to be resolved. Specifically, there are two issues. The first problem is that there is still a slight possibility that the bag nut 53 will come off from the insulating main body 51. As described above, since the bag nut 53 and the predetermined surface of the flange portion 55 come into surface contact with the first and second tapered surfaces 60 and 61, the bag nut 53 is difficult to come off from the joint body 51. However, since the first and second tapered surfaces 60 and 61 are inclined, when a strong force acts to deform the insulating member 54, the predetermined surfaces of the bag nut 53 and the flange portion 55 become the first and second tapered surfaces. There is a possibility that the bag nut 53 will come off by slipping on the surfaces 60 and 61. Further, the insulating member 54 is formed in a split ring shape, which makes it easy for the insulating member 54 to come off. Since it is formed in a split ring shape, when a couple acts on the insulating member 54 as shown by arrows 67 and 68 in FIG. 4 (B), twisting occurs. This is because when the insulating member 54 is twisted, the forces of arrows 64 and 65 shown in FIG. 4 (C) are concentrated unevenly on a part on the circumference, and it is easy for the insulating member 54 to come off from that part. is there. The second problem is the durability of the insulating member 54, that is, the resistance to breakage. When the forces of arrows 64 and 65 act on the insulating member 54, a shearing force acts on the insulating member 54, but stress is easily concentrated at the locations of reference numerals 70 and 71 in FIG. 4 (C). That is, the insulating member 54 may break from this portion.

本発明は、上記したような問題点を解決した絶縁継手を提供することを目的とし、具体的には、部品点数が少なく、かつ組立が容易で製造コストが小さいにも拘わらず、異種金属である継手本体と袋ナットとの絶縁を確保し、かつ袋ナットの継手本体からの抜けを実質的に完全に防止し、絶縁するための部材の破壊も防止されている、絶縁継手を提供することを目的としている。 An object of the present invention is to provide an insulated joint that solves the above-mentioned problems. Specifically, the present invention uses dissimilar metals despite having a small number of parts, easy assembly, and low manufacturing cost. To provide an insulated joint that ensures insulation between a joint body and a bag nut, virtually completely prevents the bag nut from coming off the joint body, and also prevents the members for insulation from being destroyed. It is an object.

本発明は、上記目的を達成するために、継手本体に対して所定の絶縁部材を介して袋ナットが設けられた絶縁継手を対象とする。継手本体はその端部に拡径したフランジ部を形成し、袋ナットはその頭部にフランジ部より大径の開口部を開けて該開口部から継手本体に挿入する。絶縁部材はその一部が切断されたリング状に形成する。そして袋ナットの内周面に環状溝部を形成し、絶縁部材はこの環状溝部内に収納する。そうすると袋ナットがスライドされるとき、絶縁部材の端面がフランジ部の端面に面接触して係止され、袋ナットの継手本体からの抜けが防止される。本発明は、絶縁部材についてその断面形状が方形になるように形成し、そして環状溝部の壁面とフランジ部の端面は継手本体の軸に対して垂直面になるように形成する。また、絶縁継手の切断部分は所定の重ね代で重ね合わされるようにし、全体として連続したリング状になるように形成する。 The present invention is intended for an insulated joint in which a bag nut is provided on the joint body via a predetermined insulating member in order to achieve the above object. The joint body has an enlarged flange portion formed at its end, and the bag nut has an opening having a diameter larger than that of the flange portion at its head and is inserted into the joint body through the opening. The insulating member is formed in a ring shape in which a part thereof is cut off. Then, an annular groove portion is formed on the inner peripheral surface of the bag nut, and the insulating member is housed in the annular groove portion. Then, when the bag nut is slid, the end face of the insulating member comes into surface contact with the end face of the flange portion and is locked, so that the bag nut is prevented from coming off from the joint body. In the present invention, the insulating member is formed so that its cross-sectional shape is square, and the wall surface of the annular groove portion and the end surface of the flange portion are formed so as to be perpendicular to the axis of the joint body. Further, the cut portion of the insulating joint is formed so as to be overlapped with a predetermined overlapping allowance so as to form a continuous ring shape as a whole.

すなわち、請求項1に記載の発明は、上記目的を達成するために、継手本体に対して所定の絶縁部材を介して袋ナットが設けられ、サドル付分水栓、止水栓、水道メータ等の給水器具に設けられている雄ネジ付きの接続口に前記袋ナットを螺合させて前記給水器具に前記継手本体を接続するようになっている絶縁継手であって、前記継手本体はその端部に拡径したフランジ部が形成され、前記袋ナットはその頭部に前記フランジ部より大径の開口部が開けられて該開口部から前記継手本体に挿入され、前記絶縁部材はその一部が切断されたリング状に形成されて前記袋ナットの内周面に形成されている環状溝部に収納されており、前記袋ナットがスライドされると、前記絶縁部材の端面が前記フランジ部の端面に面接触して係止され、それによって前記袋ナットの前記継手本体からの抜けが防止されており、前記絶縁部材はその断面形状が方形に形成され、そして前記環状溝部の壁面と前記フランジ部の端面は前記継手本体の軸に対して垂直面になっていることを特徴とする絶縁継手として構成される。
請求項2に記載の発明は、請求項1に記載の絶縁継手において、前記絶縁部材は切断部分において一方の端部近傍と他方の端部近傍とがそれぞれ一部が所定長さで切り取られ、該切り取られた部分同士が互いに重ね合わされ、それによって全体として連続したリング状に形成されていることを特徴とする絶縁継手として構成される。
That is, in the invention according to claim 1, in order to achieve the above object, a cap nut is provided to the joint body via a predetermined insulating member, and a water diversion faucet with a saddle, a water stop faucet, a water meter, etc. An insulated joint in which the cap nut is screwed into a connection port with a male screw provided in the water supply equipment to connect the joint body to the water supply equipment, and the joint body is the end thereof. An enlarged flange portion is formed in the portion, and the cap nut has an opening having a diameter larger than that of the flange portion at its head and is inserted into the joint body through the opening, and the insulating member is a part thereof. Is housed in an annular groove formed on the inner peripheral surface of the bag nut, and when the bag nut is slid, the end surface of the insulating member becomes the end surface of the flange portion. The cap nut is locked in surface contact with the joint body to prevent the cap nut from coming off from the joint body, the insulating member has a square cross-sectional shape, and the wall surface of the annular groove portion and the flange portion. Is configured as an insulated joint, characterized in that the end surface of the joint is perpendicular to the axis of the joint body.
According to the second aspect of the present invention, in the insulating joint according to the first aspect, a part of the insulating member is cut off at a cut portion in the vicinity of one end and the vicinity of the other end to a predetermined length. It is configured as an insulating joint characterized in that the cut-out portions are overlapped with each other and thereby formed into a continuous ring shape as a whole.

以上のように本発明は、継手本体に対して所定の絶縁部材を介して袋ナットが設けられ、サドル付分水栓、止水栓、水道メータ等の給水器具に設けられている雄ネジ付きの接続口に袋ナットを螺合させて給水器具に継手本体を接続するようになっている絶縁継手を対象としている。そして本発明において、継手本体はその端部に拡径したフランジ部が形成され、袋ナットはその頭部にフランジ部より大径の開口部が開けられて該開口部から継手本体に挿入され、絶縁部材はその一部が切断されたリング状に形成されて袋ナットの内周面に形成されている環状溝部に収納されており、袋ナットがスライドされると、絶縁部材の端面がフランジ部の端面に面接触して係止され、それによって袋ナットの継手本体からの抜けが防止されている。つまり部品点数が少なく、かつ組立が容易な絶縁継手になっており、製造コストは小さくて済む。そして本発明によると、絶縁部材はその断面形状が方形に形成され、そして環状溝部の壁面とフランジ部の端面は継手本体の軸に対して垂直面になっている。そうすると、袋ナットが抜け方向にスライドされるとき、絶縁部材とフランジ部の端面とが、そして絶縁部材と環状溝部の壁面とが、それぞれ垂直面同士で当接することになる。そうすると当接面で滑りが発生することがなく、袋ナットの継手本体からの抜けが実質的に完全に防止される。さらに絶縁部材は断面形状が方形になっているので応力集中の度合いは小さく、破断されやすい箇所はない。つまり絶縁部材の耐久性が高いという本発明に特有の効果が得られる。他の発明によると、絶縁部材は切断部分において一方の端部近傍と他方の端部近傍とがそれぞれ一部が所定長さで切り取られ、該切り取られた部分同士が互いに重ね合わされ、それによって全体として連続したリング状に形成されている。つまり切断部分が所定長さの重ね代で重ねられている。そうすると、絶縁部材において切断部分近傍において偶力が作用しても、絶縁部材にねじれは生じにくくなっている。つまり絶縁部材は変形しにくい。従って、袋ナットの継手本体からの抜けは強固に防止されることになる。 As described above, in the present invention, a cap nut is provided to the joint body via a predetermined insulating member, and a male screw is provided for a water supply device such as a water faucet with a saddle, a water stopcock, and a water meter. The target is an insulated joint in which a cap nut is screwed into the connection port of the water supply device to connect the joint body to the water supply equipment. Then, in the present invention, the joint body has a flange portion having an enlarged diameter formed at the end thereof, and the cap nut has an opening having a diameter larger than that of the flange portion at the head portion thereof and is inserted into the joint body through the opening. The insulating member is housed in an annular groove portion formed in a ring shape in which a part thereof is cut and formed on the inner peripheral surface of the bag nut. When the bag nut is slid, the end face of the insulating member becomes a flange portion. It comes into surface contact with the end face of the nut and is locked, thereby preventing the cap nut from coming off the joint body. In other words, the number of parts is small, and the insulated joint is easy to assemble, so the manufacturing cost is low. According to the present invention, the insulating member has a square cross-sectional shape, and the wall surface of the annular groove portion and the end surface of the flange portion are perpendicular to the axis of the joint body. Then, when the bag nut is slid in the pulling direction, the insulating member and the end surface of the flange portion, and the insulating member and the wall surface of the annular groove portion come into contact with each other on the vertical surfaces. Then, slippage does not occur on the contact surface, and the bag nut is substantially completely prevented from coming off from the joint body. Further, since the insulating member has a square cross-sectional shape, the degree of stress concentration is small and there is no place where it is easily broken. That is, the effect peculiar to the present invention that the durability of the insulating member is high can be obtained. According to another invention, in the cut portion, a part of the vicinity of one end and the vicinity of the other end are cut out at a predetermined length, and the cut parts are overlapped with each other, whereby the whole is formed. It is formed in a continuous ring shape. That is, the cut portions are overlapped with a predetermined length of overlapping allowance. Then, even if a couple acts on the insulating member in the vicinity of the cut portion, the insulating member is less likely to be twisted. That is, the insulating member is not easily deformed. Therefore, the bag nut is strongly prevented from coming off from the joint body.

本発明の実施の形態に係る絶縁継手を示す正面断面図である。It is a front sectional view which shows the insulating joint which concerns on embodiment of this invention. 本発明の実施の形態に係る絶縁継手に設けられている止め線を示す斜視図である。It is a perspective view which shows the stop wire provided in the insulating joint which concerns on embodiment of this invention. 本発明の実施の形態に係る絶縁継手を組み立てる方法を模式的に示す図で、その(A)〜(F)は組立の各工程における絶縁継手の一部を示す正面断面図である。It is a figure which shows typically the method of assembling the insulating joint which concerns on embodiment of this invention, (A)-(F) are the front sectional views which show a part of the insulating joint in each step of assembly. 従来例を示す図で、その(A)は従来の絶縁継手の正面断面図、その(B)は絶縁部材の斜視図、その(C)はその(A)におけるZ部分を拡大して示す、従来の絶縁継手の一部拡大正面図である。In the figure which shows the conventional example, (A) is the front sectional view of the conventional insulating joint, (B) is the perspective view of the insulating member, and (C) is the enlarged Z portion in (A). It is a partially enlarged front view of a conventional insulating joint.

以下、本発明の実施の形態を説明する。本発明の実施の形態に係る絶縁継手1は、図1に示されているように、鋳鉄、ステンレス等からなる継手本体2と、この継手本体2に設けられている所定の構造からなる第1の接続部3と、次に説明する本発明に特有の構造を備えた第2の接続部4とから構成されている。第1の接続部3は、いわゆるワンタッチ継手と呼ばれるものでその構造は周知なので詳しくは説明しないが、継手本体2に対して螺合される袋ナット6と、ゴム等からなるパッキン7と、パッキン7を押さえると共にこれを締め付けるカバー9と、止め金具10と、この止め金具10に設けられている止め金具ボール11、11、…とから構成されている。従って、図には示されていないが、給水管をこの第1の接続部3に適当な位置まで挿入し、袋ナット6を締め付けると止め金具ボール11、11が給水管に締め付けられて給水管を接続できるようになっている。 Hereinafter, embodiments of the present invention will be described. As shown in FIG. 1, the insulated joint 1 according to the embodiment of the present invention has a joint main body 2 made of cast iron, stainless steel, etc., and a first one having a predetermined structure provided on the joint main body 2. It is composed of the connection portion 3 of the above and the second connection portion 4 having a structure peculiar to the present invention described below. The first connection portion 3 is a so-called one-touch joint, and its structure is well known, so that will not be described in detail. However, a bag nut 6 screwed into the joint body 2, a packing 7 made of rubber or the like, and a packing It is composed of a cover 9 for pressing and tightening the stopper 10, a stopper 10, and stopper balls 11, 11, ... Provided to the stopper 10. Therefore, although not shown in the figure, when the water supply pipe is inserted into the first connection portion 3 to an appropriate position and the bag nut 6 is tightened, the stopper balls 11 and 11 are tightened to the water supply pipe and the water supply pipe is used. Can be connected.

第2の接続部4は、サドル付分水栓、止水栓、水道メータ等の給水器具に接続する接続部であり、給水器具に設けられている、雄ネジが形成された接続口に接続するようになっている。第2の接続部4は、継手本体2と、この継手本体2に設けられている袋ナット13と、止め線すなわち絶縁ストッパ14と、パッキン15とから構成されている。継手本体2は、その端部に拡径したフランジ部17が形成されており、このフランジ部17の内側の端面18は継手本体2の軸に対して垂直面になっており、後で説明する絶縁ストッパ14の所定の端面が面接触するようになっている。継手本体2には、このフランジ部17に連続して所定の外径からなる円筒状の段部19が形成され、さらに中心寄りは外径が小さい胴部21になっている。 The second connection portion 4 is a connection portion for connecting to a water supply device such as a diversion faucet with a saddle, a water stop valve, and a water meter, and is connected to a connection port provided on the water supply device and having a male screw formed. It is designed to do. The second connecting portion 4 is composed of a joint main body 2, a bag nut 13 provided on the joint main body 2, a stop wire, that is, an insulating stopper 14, and a packing 15. The joint body 2 is formed with a flange portion 17 having an enlarged diameter at its end, and the inner end surface 18 of the flange portion 17 is a surface perpendicular to the axis of the joint body 2, which will be described later. The predetermined end faces of the insulating stopper 14 are in surface contact with each other. In the joint body 2, a cylindrical step portion 19 having a predetermined outer diameter is formed continuously on the flange portion 17, and a body portion 21 having a smaller outer diameter is formed closer to the center.

袋ナット13は、接続する給水器具の接続口と同種の金属から形成されており、例えば砲金からなる。袋ナット13には雌ネジが形成されており、給水器具の接続口の雄ネジに螺合するようになっている。本実施の形態において袋ナット13はその頭部が開口しており、その内径は継手本体2のフランジ部17よりわずかに大きい。従って、袋ナット13はフランジ部17に妨げられることなく、継手本体2の胴部21に挿入できる。袋ナット13には、開口部近傍においてその内周面に環状の溝部すなわち環状溝部23が形成されている。この環状溝部23は次に説明する絶縁ストッパ14を収納する溝になっている。環状溝部23の溝の壁面24は絶縁ストッパ14の端面が面接触するようになっており、軸に対して垂直面になっている。 The bag nut 13 is made of the same type of metal as the connection port of the water supply device to be connected, and is made of, for example, a gunmetal. A female screw is formed on the bag nut 13 so as to be screwed into the male screw of the connection port of the water supply device. In the present embodiment, the bag nut 13 has an open head, and its inner diameter is slightly larger than that of the flange portion 17 of the joint body 2. Therefore, the bag nut 13 can be inserted into the body portion 21 of the joint body 2 without being hindered by the flange portion 17. The bag nut 13 is formed with an annular groove portion, that is, an annular groove portion 23 on the inner peripheral surface thereof in the vicinity of the opening. The annular groove portion 23 is a groove for accommodating the insulating stopper 14 described below. The wall surface 24 of the groove of the annular groove portion 23 is in surface contact with the end surface of the insulating stopper 14, and is perpendicular to the axis.

絶縁ストッパ14は、異種金属である継手本体2と袋ナット13の間に設けられ、これらを絶縁する絶縁部材である。そして絶縁部材であると共に袋ナット13の継手本体2からの抜けを防止する係止部材にもなっている。従って、絶縁ストッパ14は弾性と高い強度を備えた絶縁体から形成する必要があり、本実施の形態においてはポリアセタールから形成されている。絶縁ストッパ14は、図2に示されているように、一部が切断されたリング状を呈している。本実施の形態に係る絶縁ストッパ14はいくつか特徴があるが、第1の特徴はその断面形状が方形になっている点である。図2における上面側の端面26と裏面側の端面27はそれぞれ継手本体2のフランジ部17の端面18と袋ナット13の環状溝部23の壁面24とに面接触するようになっている。第2の特徴は、リングの切断箇所が所定の重ね代で重ねられており、それによって実質的に連続したリング状になっている点である。詳しく説明すると、切断箇所において絶縁ストッパ14の一方の端部は、リング幅の略1/2の幅で所定の長さの円弧だけ延長している。他方の端部も同様にリング幅の略1/2の幅で所定の長さの円弧だけ延長しているが、一方の端部からの延長している円弧に干渉しない位置で延長している。従って、これら一方と他方の延長している円弧部分同士が、互いに重なり合っている。従って、符号29、30のように絶縁ストッパ14に対して偶力が作用しても、絶縁ストッパ14のねじれが防止されている。なお、絶縁ストッパ14は外部からの力が作用していない状態においては、その内径は継手本体2のフランジ部17の外径より小さく、その外径は袋ナット13の環状溝部23より若干大きい。 The insulating stopper 14 is an insulating member provided between the joint body 2 and the bag nut 13, which are dissimilar metals, to insulate them. In addition to being an insulating member, it is also a locking member that prevents the bag nut 13 from coming off from the joint body 2. Therefore, the insulating stopper 14 needs to be formed of an insulator having elasticity and high strength, and is formed of polyacetal in the present embodiment. As shown in FIG. 2, the insulating stopper 14 has a ring shape in which a part is cut off. The insulating stopper 14 according to the present embodiment has some features, but the first feature is that the cross-sectional shape is square. The end surface 26 on the upper surface side and the end surface 27 on the back surface side in FIG. 2 are in surface contact with the end surface 18 of the flange portion 17 of the joint body 2 and the wall surface 24 of the annular groove portion 23 of the bag nut 13, respectively. The second feature is that the cut portions of the rings are overlapped with a predetermined overlapping allowance, thereby forming a substantially continuous ring shape. More specifically, at the cut portion, one end of the insulating stopper 14 is approximately ½ of the ring width and extends by an arc of a predetermined length. Similarly, the other end is extended by an arc of a predetermined length with a width of approximately 1/2 of the ring width, but is extended at a position that does not interfere with the arc extending from one end. .. Therefore, one of these extending arc portions and the other extending arc portions overlap each other. Therefore, even if a couple acts on the insulating stopper 14 as shown in reference numerals 29 and 30, the insulating stopper 14 is prevented from being twisted. When no external force is applied to the insulating stopper 14, the inner diameter thereof is smaller than the outer diameter of the flange portion 17 of the joint body 2, and the outer diameter thereof is slightly larger than the annular groove portion 23 of the bag nut 13.

本実施の形態に係る絶縁継手1の第2の接続部4は容易に組み立てることができる。まず図3の(A)に示されているように、継手本体2に対して絶縁ストッパ14を挿入する。絶縁ストッパ14の内径はフランジ部17の外径より小さいので、リングの切断部分を広げて径を大きくして挿入する。そして図3の(B)に示されているように、絶縁ストッパ14を胴部21に待機させる。図3の(C)に示されているように、袋ナット13を継手本体2に挿入し、継手本体2の胴部21に位置させる。図3の(D)に示されているように、絶縁ストッパ14をその径が小さくなるように変形させて袋ナット13の環状溝部23内に挿入する。そうすると、図3の(E)に示されているように、絶縁ストッパ14の弾性力によって絶縁ストッパ14は環状溝部23内でしっかりと固定される。袋ナット13をスライドさせると、図3の(F)に示されているように、絶縁ストッパ14の内周面が継手本体2の段部19上をスライドして、絶縁ストッパ14の端面がフランジ部17の端面に当接する。すなわち袋ナット13は抜けが防止される。本実施の形態においては、絶縁ストッパ14は断面形状が方形になっており、フランジ部17の端面18と環状溝部23の壁面24は軸に対して垂直面になっているので、それぞれの面同士は垂直に面接触することになる。これによって袋ナット13に強い抜き方向の力が作用しても袋ナット13が継手本体2から抜けにくくなっている。パッキン15を挿入して第2の接続部4の組立が完了する。 The second connection portion 4 of the insulating joint 1 according to the present embodiment can be easily assembled. First, as shown in FIG. 3A, the insulating stopper 14 is inserted into the joint body 2. Since the inner diameter of the insulating stopper 14 is smaller than the outer diameter of the flange portion 17, the cut portion of the ring is widened to increase the diameter and inserted. Then, as shown in FIG. 3B, the insulating stopper 14 is made to stand by in the body portion 21. As shown in FIG. 3C, the bag nut 13 is inserted into the joint body 2 and positioned at the body 21 of the joint body 2. As shown in FIG. 3D, the insulating stopper 14 is deformed so that its diameter becomes smaller and inserted into the annular groove portion 23 of the bag nut 13. Then, as shown in FIG. 3 (E), the insulating stopper 14 is firmly fixed in the annular groove portion 23 by the elastic force of the insulating stopper 14. When the bag nut 13 is slid, as shown in FIG. 3 (F), the inner peripheral surface of the insulating stopper 14 slides on the stepped portion 19 of the joint body 2, and the end surface of the insulating stopper 14 is flanged. It comes into contact with the end face of the portion 17. That is, the bag nut 13 is prevented from coming off. In the present embodiment, the insulating stopper 14 has a rectangular cross section, and the end surface 18 of the flange portion 17 and the wall surface 24 of the annular groove portion 23 are perpendicular surfaces to the shaft. Will be in surface contact vertically. This makes it difficult for the bag nut 13 to come off from the joint body 2 even if a strong force in the pulling direction acts on the bag nut 13. The packing 15 is inserted to complete the assembly of the second connecting portion 4.

本実施の形態に係る絶縁継手1は色々な変形が可能である。例えば、本実施の形態においては第1の接続部3はいわゆるワンタッチ継手から構成されているように説明したが、他の継手から構成してもよい。また絶縁ストッパ14は、ポリアセタールからなるように説明したが、必要によりグラスファイバー等の強化繊維入り樹脂から形成するようにしてもよい。 The insulating joint 1 according to the present embodiment can be deformed in various ways. For example, in the present embodiment, the first connection portion 3 is described as being composed of a so-called one-touch joint, but may be composed of another joint. Further, although the insulating stopper 14 has been described as being made of polyacetal, if necessary, it may be formed of a resin containing reinforcing fibers such as glass fiber.

1 絶縁継手 2 継手本体
3 第1の接続部 4 第2の接続部
6 袋ナット 13 袋ナット
14 絶縁ストッパ 15 パッキン
17 フランジ部 18 端面
19 段部 21 胴部
23 環状溝部 24 壁面
1 Insulated joint 2 Joint body 3 First connection part 4 Second connection part 6 Bag nut 13 Bag nut 14 Insulation stopper 15 Packing 17 Flange part 18 End face 19 Step part 21 Body part 23 Circular groove part 24 Wall surface

Claims (2)

継手本体に対して所定の絶縁部材を介して袋ナットが設けられ、サドル付分水栓、止水栓、水道メータ等の給水器具に設けられている雄ネジ付きの接続口に前記袋ナットを螺合させて前記給水器具に前記継手本体を接続するようになっている絶縁継手であって、
前記継手本体はその端部に拡径したフランジ部が形成され、
前記袋ナットはその頭部に前記フランジ部より大径の開口部が開けられて該開口部から前記継手本体に挿入され、
前記絶縁部材はその一部が切断されたリング状に形成されて前記袋ナットの内周面に形成されている環状溝部に収納されており、
前記袋ナットがスライドされると、前記絶縁部材の端面が前記フランジ部の端面に面接触して係止され、それによって前記袋ナットの前記継手本体からの抜けが防止されており、
前記絶縁部材はその断面形状が方形に形成され、そして前記環状溝部の壁面と前記フランジ部の端面は前記継手本体の軸に対して垂直面になっていることを特徴とする絶縁継手。
A bag nut is provided to the joint body via a predetermined insulating member, and the bag nut is attached to a connection port with a male screw provided in a water supply device such as a diversion faucet with a saddle, a water stop valve, and a water meter. An insulating joint that is screwed to connect the joint body to the water supply device.
The joint body has a flange portion with an enlarged diameter formed at the end thereof.
The bag nut has an opening having a diameter larger than that of the flange portion at its head, and is inserted into the joint body through the opening.
The insulating member is formed in a ring shape in which a part thereof is cut, and is housed in an annular groove portion formed on the inner peripheral surface of the bag nut.
When the bag nut is slid, the end surface of the insulating member comes into surface contact with the end surface of the flange portion and is locked, thereby preventing the bag nut from coming off from the joint body.
The insulating member is an insulating joint characterized in that the cross-sectional shape of the insulating member is formed into a square shape, and the wall surface of the annular groove portion and the end surface of the flange portion are perpendicular surfaces to the axis of the joint body.
請求項1に記載の絶縁継手において、前記絶縁部材は切断部分において一方の端部近傍と他方の端部近傍とがそれぞれ一部が所定長さで切り取られ、該切り取られた部分同士が互いに重ね合わされ、それによって全体として連続したリング状に形成されていることを特徴とする絶縁継手。 In the insulating joint according to claim 1, in the cut portion of the insulating member, a part near one end and a part near the other end are cut out to a predetermined length, and the cut parts are overlapped with each other. An insulating joint characterized in that it is formed in a continuous ring shape as a whole.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6432448U (en) * 1987-08-20 1989-03-01
JP2007120523A (en) * 2005-10-25 2007-05-17 Higashio Mech Co Ltd Pipe joint
JP2008248983A (en) * 2007-03-29 2008-10-16 Kitz Corp Insulating joint and method of assembling the same
JP2010019408A (en) * 2008-07-10 2010-01-28 Showarasenkan Seisakusho Co Ltd Stainless steel pipe joint for inhibiting electric corrosion, and insulating spacer for stainless steel pipe joint for inhibiting electric corrosion
JP2017180821A (en) * 2016-01-05 2017-10-05 ザ・ボーイング・カンパニーThe Boeing Company Apparatus for coupling tubular components and associated methods
JP6526937B1 (en) * 2019-01-29 2019-06-05 Tpr株式会社 Method of manufacturing seal ring and seal ring

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6432448U (en) * 1987-08-20 1989-03-01
JP2007120523A (en) * 2005-10-25 2007-05-17 Higashio Mech Co Ltd Pipe joint
JP2008248983A (en) * 2007-03-29 2008-10-16 Kitz Corp Insulating joint and method of assembling the same
JP2010019408A (en) * 2008-07-10 2010-01-28 Showarasenkan Seisakusho Co Ltd Stainless steel pipe joint for inhibiting electric corrosion, and insulating spacer for stainless steel pipe joint for inhibiting electric corrosion
JP2017180821A (en) * 2016-01-05 2017-10-05 ザ・ボーイング・カンパニーThe Boeing Company Apparatus for coupling tubular components and associated methods
JP6526937B1 (en) * 2019-01-29 2019-06-05 Tpr株式会社 Method of manufacturing seal ring and seal ring

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