JPH0914541A - Separation preventing pipe joint - Google Patents
Separation preventing pipe jointInfo
- Publication number
- JPH0914541A JPH0914541A JP17945495A JP17945495A JPH0914541A JP H0914541 A JPH0914541 A JP H0914541A JP 17945495 A JP17945495 A JP 17945495A JP 17945495 A JP17945495 A JP 17945495A JP H0914541 A JPH0914541 A JP H0914541A
- Authority
- JP
- Japan
- Prior art keywords
- coating layer
- pipe joint
- locking
- pipe
- outer peripheral
- 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.)
- Granted
Links
Landscapes
- Joints With Sleeves (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、鋼管の外周面が硬質塩
化ビニール等によりなる樹脂被覆管により覆われた流体
管と、他方の流体管同士を、離脱を防止して接続する際
に用いられる管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for connecting a fluid pipe in which the outer peripheral surface of a steel pipe is covered with a resin-coated pipe made of hard vinyl chloride or the like and the other fluid pipe to each other while preventing their separation. Pipe fittings.
【0002】[0002]
【従来の技術】一方の流体管の受口部と他方の流体管の
挿口部との接続部に用いて、流体管相互の離脱を防止す
る管継手は種々のものが提案されており、例えば図13
に示すような管継手が知られている。2. Description of the Related Art Various pipe joints have been proposed for use in a connecting portion between a receiving portion of one fluid pipe and an insertion portion of another fluid pipe to prevent mutual separation of the fluid pipes. For example, in FIG.
A pipe joint as shown in is known.
【0003】図13において、01及び02は、それぞ
れ互いに接続される流体管AとBの受口部及び挿口部で
あり、受口部01の内周面に形成された凹部03内に
は、接続部の水密性を保持するためのパッキン04が嵌
挿されている。一方の流体管Bは、鋼管010の内外周
面に硬質塩化ビニール又はナイロン等の樹脂被覆層01
1、011’をライニングして構成されている。In FIG. 13, reference numerals 01 and 02 respectively denote an inlet portion and an inlet portion of the fluid pipes A and B which are connected to each other, and the recess portion 03 formed in the inner peripheral surface of the inlet portion 01 has A packing 04 for retaining the watertightness of the connection portion is fitted. One of the fluid pipes B is a resin coating layer 01 such as hard vinyl chloride or nylon on the inner and outer peripheral surfaces of the steel pipe 010.
It is constructed by lining 1,011 '.
【0004】挿口部02には、ボルト05を介して受口
部01に係合された離脱防止用の金具06が外嵌されて
いる。金具06の本体部には、ねじ孔07が円周方向に
複数穿設されており、各ねじ孔07内には、先端に係止
刃012が形成された係止片08が収容され、ボルト0
9により流体管Bの管軸中心に向けて押圧されるように
なっている。On the insertion opening 02, a metal fitting 06 for engaging with the receiving opening 01 via a bolt 05 for preventing separation is fitted. A plurality of screw holes 07 are provided in the main body of the metal fitting 06 in the circumferential direction, and a locking piece 08 having a locking blade 012 formed at the tip is housed in each screw hole 07, and a bolt 0
It is adapted to be pressed by 9 toward the center of the tube axis of the fluid tube B.
【0005】[0005]
【発明が解決しようとする課題】上述した従来の管継手
において、ボルト09を強く締め過ぎたり、管内の流体
圧により両流体管A、Bに引抜力が発生したりすると、
流体管Bの外周面は樹脂被覆層011によりライニング
してあるため、図14に示すように係止片08の先端の
係止刃012が、上記樹脂被覆層011を破断して深く
食い込む。In the above-mentioned conventional pipe joint, if the bolt 09 is overtightened or the fluid pressure in the pipe causes a pulling force to both fluid pipes A and B,
Since the outer peripheral surface of the fluid pipe B is lined with the resin coating layer 011 as shown in FIG. 14, the locking blade 012 at the tip of the locking piece 08 breaks the resin coating layer 011 and bites deep into it.
【0006】このようになると、係止刃012が鋼管0
10の外周面に接触したり、係止刃012付近の樹脂被
覆層011が剥離され、鋼管010の外周面が露出した
りする。その結果、鋼管010が金属製の係止片08を
介して、あるいは直接外部と導通され、鋼管010が、
土中に埋め戻された際の土壌内の迷走電流により電食し
たり、土壌内の水分等により腐食するなどして、耐用年
数が短くなるという問題があった。In this case, the locking blade 012 is attached to the steel pipe 0.
The outer peripheral surface of the steel pipe 010 is exposed because the resin coating layer 011 near the locking blade 012 is peeled off. As a result, the steel pipe 010 is electrically connected to the outside through the metal locking piece 08 or directly, and the steel pipe 010 is
There is a problem that the service life is shortened due to electrolytic corrosion due to stray current in the soil when it is backfilled in the soil, corrosion due to moisture in the soil, and the like.
【0007】本発明は、上記問題点を解決するためにな
されたもので、係止爪の樹脂被覆層内への食い込み量を
規制することにより、鋼管が外部と導通するのを防止
し、それが電食したり腐食したりするのを阻止しうるよ
うにした離脱防止管継手を提供することを目的とするも
のである。The present invention has been made to solve the above-mentioned problems, and prevents the steel pipe from being electrically connected to the outside by restricting the amount of engagement of the locking claw into the resin coating layer. It is an object of the present invention to provide a separation prevention pipe joint capable of preventing electrolytic corrosion and corrosion of a steel.
【0008】[0008]
【課題を解決するための手段】上記課題を解決するため
に、本発明の離脱防止管継手は、一方の流体管の端部に
形成された受口部内に、外周面が合成樹脂材による被覆
層により覆われた金属製流体管の端部の挿口部を挿入
し、前記受口部に外嵌して係合された離脱防止体におけ
る係止片を挿口部の外周面に圧接することにより、両流
体管同士を接続するようにした離脱防止管継手におい
て、前記係止片における内面に、円周方向を向く複数の
凸条と凹条とからなり、かつ一部の凸条の稜線部を、前
記合成樹脂材の被覆層の厚さよりも小さい寸法だけ切除
して平坦面とした係止爪を設けたことを特徴としてい
る。In order to solve the above problems, in the separation prevention pipe joint of the present invention, the outer peripheral surface is covered with a synthetic resin material in the receiving portion formed at the end of one fluid pipe. The insertion port at the end of the metal fluid pipe covered with the layer is inserted, and the locking piece of the detachment prevention body externally fitted and engaged with the receiving port is pressed against the outer peripheral surface of the insertion port. Thus, in the separation prevention pipe joint configured to connect both fluid pipes, the inner surface of the locking piece is composed of a plurality of convex strips and concave strips facing in the circumferential direction, and a part of the convex strips. It is characterized in that the ridge portion is cut off by a size smaller than the thickness of the synthetic resin material coating layer to provide a locking claw having a flat surface.
【0009】上記離脱防止管継手において、凸条と凹条
とが、管軸方向に交互に、かつ連続的に形成されている
のが好ましい。In the separation preventing pipe joint, it is preferable that the convex stripes and the concave stripes are formed alternately and continuously in the axial direction of the pipe.
【0010】上記離脱防止管継手において、凸条の稜線
部が、円周方向に所定の長さずつ間欠的に切除されてい
るのが好ましい。In the separation preventing pipe joint, it is preferable that the ridge line portion of the ridge is intermittently cut by a predetermined length in the circumferential direction.
【0011】また、本発明の離脱防止管継手は、一方の
流体管の端部に形成された受口部内に、外周面が合成樹
脂材による被覆層により覆われた金属製流体管の端部の
挿口部を挿入し、前記受口部に外嵌して係合された1対
の離脱防止体における係止片を挿口部の外周面に当接さ
せ、両離脱防止体の対向端面に互いに所定寸法離間させ
て設けたフランジ部同士を、締結手段をもって締め付け
ることにより、前記係止片に形成した係止爪を前記合成
樹脂材の被覆層に食い込ませ、流体管同士を接続するよ
うにした離脱防止管継手において、前記互いに対向する
フランジ部の適所に、係止片の縮径方向への移動量を制
限し、係止爪の被覆層への食い込み量を規制するスペー
サを設けたことを特徴としている。Further, in the separation prevention pipe joint of the present invention, the end portion of the metal fluid pipe whose outer peripheral surface is covered with the coating layer made of the synthetic resin is formed in the receiving portion formed at the end portion of one fluid pipe. Of the detachment preventing body inserted into the receiving portion, and the locking pieces of the pair of detachment preventing bodies engaged with the receiving portion by being brought into contact with the outer peripheral surfaces of the inserting portions, and the opposite end faces of the detachment preventing bodies. By fastening the flange portions provided with a predetermined distance from each other with fastening means, the locking claws formed on the locking pieces are made to bite into the coating layer of the synthetic resin material to connect the fluid pipes. In the separation preventing pipe joint, the spacers are provided at appropriate positions of the flange portions facing each other so as to limit the moving amount of the locking pieces in the radial direction and limit the amount of the locking claws biting into the coating layer. It is characterized by that.
【0012】この離脱防止管継手において、スペーサ
が、対向するフランジ部のいずれか一方に、一体的に設
けられているのが好ましい。In this separation prevention pipe joint, it is preferable that the spacer is integrally provided on either one of the facing flange portions.
【0013】[0013]
【作用】請求項1の発明によると、係止爪における平坦
面が流体管の外周面に当接して、凸条の被覆層への食い
込み量が規制されることにより、係止爪の先端が内部の
金属製流体管の表面まで到達することななく、従って金
属製流体管が係止爪を介して外部と導通し、電食や腐食
等の発生するのが防止される。According to the first aspect of the present invention, the flat surface of the locking claw is brought into contact with the outer peripheral surface of the fluid pipe, and the amount of protrusion of the ridge into the coating layer is regulated. The metal fluid pipe does not reach the surface of the metal fluid pipe inside, so that the metal fluid pipe is prevented from being electrically connected to the outside through the locking claws and causing electrolytic corrosion or corrosion.
【0014】請求項2に記載の発明によると、被覆層が
複数の凸条により係止されるとともに、被覆層が複数の
平坦面により強圧されるため、流体管の離脱防止作用が
大きく、かつ被覆層の剥離防止効果が高まる。According to the second aspect of the present invention, since the coating layer is locked by the plurality of ridges and the coating layer is strongly pressed by the plurality of flat surfaces, the effect of preventing separation of the fluid pipe is large, and The effect of preventing peeling of the coating layer is enhanced.
【0015】請求項3に記載の発明によると、円周方向
への引っ掛かり作用が大となるため、流体管の管軸回り
の回転が防止される。According to the third aspect of the present invention, since the hooking action in the circumferential direction is large, the rotation of the fluid pipe about the pipe axis is prevented.
【0016】請求項4に記載の発明によると、スペーサ
が係止爪の被覆層への食い込み量を規制するので、係止
爪の先端が金属製流体管の表面まで到達するのが防止さ
れる。According to the invention as set forth in claim 4, since the spacer restricts the amount of engagement of the locking claw into the coating layer, the tip of the locking claw is prevented from reaching the surface of the metal fluid pipe. .
【0017】請求項5に記載の発明によると、スペーサ
の部品管理や配管作業等が容易となる。According to the invention described in claim 5, it becomes easy to manage the spacer parts and to perform piping work.
【0018】[0018]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図1及び図2は本発明の第1実施例を示すもの
で、1及び2は互いに接続される流体管A及びBの受口
部と挿口部であり、受口部1の端部外周面には鍔3が一
体的に形成されている。4は、受口部1と挿口部2との
水密性を保持するパッキンである。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention, in which 1 and 2 are the receiving portions and the insertion portions of the fluid pipes A and B which are connected to each other, and the outer periphery of the end portion of the receiving portion 1. The collar 3 is integrally formed on the surface. 4 is a packing that keeps the watertightness between the receiving portion 1 and the insertion portion 2.
【0019】流体管Bは、前述した従来例と同様、鋼管
25の内外周面にナイロン又は硬質塩化ビニール等によ
りなる樹脂被覆層26、26’が強固かつ一体的にライ
ニングされた3層構造となっている。The fluid pipe B has a three-layer structure in which resin coating layers 26 and 26 'made of nylon or hard vinyl chloride are firmly and integrally lined on the inner and outer peripheral surfaces of the steel pipe 25, as in the above-mentioned conventional example. Has become.
【0020】5は、環状をなす離脱防止体で、挿口部に
外嵌された環状基部6と、その上部と下部とに対称的に
設けられた上部受部7及び下部受部8と、受口部1の鍔
3に係止された係止部9とを有している。環状基部6
は、断面がL字形をなし、受口部1の開口端と対向する
鉛直壁部10と、鍔3の外面と対向する庇部11とを有
する。Reference numeral 5 denotes a ring-shaped detachment preventing member, which is an annular base portion 6 externally fitted to the insertion opening portion, and an upper receiving portion 7 and a lower receiving portion 8 which are symmetrically provided on an upper portion and a lower portion thereof. The engaging portion 9 is engaged with the flange 3 of the receiving portion 1. Annular base 6
Has an L-shaped cross section, and has a vertical wall portion 10 facing the opening end of the receiving portion 1 and an eaves portion 11 facing the outer surface of the collar 3.
【0021】上部受部7の外方の内面12は、受口部1
側に向って傾斜するテーパ面となっており、また後記ボ
ルト挿通用の貫通孔13が形成されている。The outer inner surface 12 of the upper receiving portion 7 is provided with the receiving portion 1
It has a tapered surface that is inclined toward the side, and a through hole 13 for inserting a bolt described later is formed.
【0022】下部受部8の外方の内面14は、上記上部
受部8の内面12と反対方向に傾斜するテーパ面となっ
ている。なお、下部受部8は、環状基部6の適所に所定
間隔おきに2箇所もしくはそれ以上設けてもよい。The outer inner surface 14 of the lower receiving portion 8 is a tapered surface inclined in the opposite direction to the inner surface 12 of the upper receiving portion 8. In addition, the lower receiving portion 8 may be provided at two or more places at predetermined positions at appropriate positions on the annular base portion 6.
【0023】前記上部受部7内には、係止片15と摺動
片16とが収容され、係止片15の外周17は、上記内
面12と反対方向に傾斜するテーパ面をなし、また下面
には、挿口部2の外周面に係止する円弧状に湾曲した凹
凸条の係止爪18が形成されている。A locking piece 15 and a sliding piece 16 are housed in the upper receiving portion 7, and an outer periphery 17 of the locking piece 15 has a tapered surface inclined in the opposite direction to the inner surface 12, and On the lower surface, a concave and convex locking claw 18 curved in an arc shape that locks on the outer peripheral surface of the insertion opening 2 is formed.
【0024】摺動片16の上面19と下面20は、それ
ぞれ上部受部7の内面12及び係止片15の外面と同じ
方向に傾斜するテーパ面となっており、かつ中央にはボ
ルト挿通用の貫通孔21が形成されている。The upper surface 19 and the lower surface 20 of the sliding piece 16 are tapered surfaces inclining in the same direction as the inner surface 12 of the upper receiving portion 7 and the outer surface of the locking piece 15, respectively, and the center for bolt insertion. Through holes 21 are formed.
【0025】22は、ボルト23とナット24とからな
る締結具で、ボルト23は、摺動片16と上部受部7に
形成した貫通孔21及び13に挿通され、ボルト頭部2
3’は受口部1の鍔3に係止されている。ボルト23に
螺合されたナット24は、摺動片16の端面に当接して
これを上部受部7の奥部へ押圧する。Numeral 22 is a fastener composed of a bolt 23 and a nut 24. The bolt 23 is inserted into the through holes 21 and 13 formed in the sliding piece 16 and the upper receiving portion 7, and the bolt head 2
3 ′ is locked to the collar 3 of the socket 1. The nut 24 screwed to the bolt 23 contacts the end surface of the sliding piece 16 and presses it into the inner part of the upper receiving portion 7.
【0026】15’は、上記係止片15と同形状をなす
係止片で、下部受部8内に収容されている。Reference numeral 15 'is a locking piece having the same shape as the locking piece 15 and is housed in the lower receiving portion 8.
【0027】この第1実施例の管継手の特徴とするとこ
ろは、両係止片15、15’の係止爪18の形状にあ
る。The characteristic of the pipe joint of the first embodiment is the shape of the locking claws 18 of both locking pieces 15 and 15 '.
【0028】すなわち、図3及び図4の拡大して示すよ
うに、係止爪18は、凸条18aと凹条18bとを管軸
方向に交互に連続的に形成して構成され、かつ凸条18
aの稜線部を1条おきに切除して平坦面18cとしたも
のである。なお、凸条18aの稜線部の切除寸法、すな
わち凸条18aの頂端から平坦面18cまでの寸法L
は、樹脂被覆層26の厚さtよりも所要寸法小となるよ
うにしてある。That is, as shown in the enlarged view of FIGS. 3 and 4, the locking claw 18 is formed by continuously and alternately forming the convex ridges 18a and the concave ridges 18b in the pipe axis direction. Article 18
The ridge line portion of a is cut every other line to form a flat surface 18c. In addition, the cutting dimension of the ridge line portion of the ridge 18a, that is, the dimension L from the top end of the ridge 18a to the flat surface 18c.
Has a required dimension smaller than the thickness t of the resin coating layer 26.
【0029】上記第1実施例の管継手においては、ナッ
ト24を締め付けて、摺動片16を上部受部7内の奥部
に押圧すれば、図5に示すように係止片15、15’の
各係止爪18先端の凸条18aが、流体管Bの樹脂被覆
層26の外周面に食い込むとともに、管を中心方向に強
く締め付けることにより、流体管A、B同士は、離脱防
止が図られて接続される。In the pipe joint of the first embodiment, when the nut 24 is tightened and the sliding piece 16 is pushed to the inner part of the upper receiving portion 7, the locking pieces 15, 15 are formed as shown in FIG. The protrusions 18a at the tips of the respective locking claws 18 'bite into the outer peripheral surface of the resin coating layer 26 of the fluid pipe B and strongly tighten the pipe in the center direction, so that the fluid pipes A and B can be prevented from separating from each other. Planned and connected.
【0030】この状態からナット24を更に締め付け、
係止片15、15’を強く押圧したとしても、凸条18
aの稜線部を切除して平坦面18cとしてあるため、平
坦面18cが樹脂被覆層26の外周面と当接して凸条1
8aのそれ以上の食い込みが防止される。従って、各凸
条18aの頂端が鋼管25の外周面まで到達して金属同
士で接触する恐れはない。From this state, further tighten the nut 24,
Even if the locking pieces 15, 15 'are strongly pressed, the ridges 18
Since the ridge line portion of a is cut off to form the flat surface 18c, the flat surface 18c abuts the outer peripheral surface of the resin coating layer 26 and the ridge 1
Further biting of 8a is prevented. Therefore, there is no possibility that the top ends of the ridges 18a reach the outer peripheral surface of the steel pipe 25 and come into contact with each other.
【0031】その結果、流体管A、Bの接続後土中に埋
め戻されても、鋼管25が係止片15、15’を介して
周囲の土壌と導通され、土壌内の迷走電流により電食し
たり、水分等により腐食したりするのが防止される。As a result, even after the fluid pipes A and B are connected and buried in the soil, the steel pipe 25 is electrically connected to the surrounding soil through the engaging pieces 15 and 15 ', and a stray current in the soil causes an electric charge. It is prevented from eating or corroding due to moisture or the like.
【0032】また、凸条18aにより樹脂被覆層26が
破断されることがなく、しかも凸条18aを挟む両側の
樹脂被覆層26は、各平坦面18cにより管の中心方向
に強圧されているため、流体管A、B間に大きな引抜力
が作用した場合でも、樹脂被覆層26が鋼管25より剥
離するなどして、鋼管25の表面が露出するということ
もなくなる。Further, since the resin coating layer 26 is not broken by the ridges 18a, and the resin coating layers 26 on both sides of the ridge 18a are strongly pressed toward the center of the pipe by the flat surfaces 18c. Even when a large drawing force acts between the fluid pipes A and B, the resin coating layer 26 is not peeled off from the steel pipe 25 and the surface of the steel pipe 25 is not exposed.
【0033】図6は、上記第1実施例の係止爪18の変
形例を示す。上述した実施例では、凸条18aにおける
円周方向の全部の稜線部を切除して平坦面18cとした
が、この変形例は凸条18aの稜線部を円周方向に所定
の長さずつ間欠的に切除することにより、複数の短寸の
平坦面18cを形成し、平坦面18c同士の間に凸条1
8aを残すようにしたものである。FIG. 6 shows a modified example of the locking claw 18 of the first embodiment. In the above-described embodiment, the entire ridge line portion in the circumferential direction of the ridge 18a is cut off to form the flat surface 18c. However, in this modification, the ridge line portion of the ridge 18a is intermittently formed by a predetermined length in the circumferential direction. To form a plurality of short flat surfaces 18c, and the ridges 1 are formed between the flat surfaces 18c.
8a is left.
【0034】このようにすると、上述した実施例と同様
の作用効果に加えて、円周方向を向く短寸の凸条18a
が被覆樹脂層26の外周面に一定間隔おきに食い込むた
め、その円周方向への引っ掛かり効果が大となり、流体
管Bにねじり力が作用しても、それが管軸回りに回転す
るのを防止しうる利点がある。By doing so, in addition to the same effects as the above-described embodiment, the short ridge 18a facing the circumferential direction is provided.
Bites into the outer peripheral surface of the coating resin layer 26 at regular intervals, so the effect of being caught in the circumferential direction becomes great, and even if a twisting force acts on the fluid pipe B, it will rotate around the pipe axis. There are preventable advantages.
【0035】なお、上記凸条18aと凹条18bとを連
続的に形成したが、不連続でもよく、また1条おきに形
成した平坦面18cを、2条おき又はそれ以上とするこ
ともある。Although the ridges 18a and the ridges 18b are formed continuously, they may be discontinuous, and the flat surfaces 18c formed every other line may be formed every two lines or more. .
【0036】次に、本発明の第2実施例を図7〜図9を
参照して説明する。Next, a second embodiment of the present invention will be described with reference to FIGS.
【0037】図7に示すように、この実施例の管継手
は、半割円筒形をなす上下1対の離脱防止体27、27
の一部が、上記実施例と同じ様に係止片28、28とな
っており、両係止片28の内周面全体に係止爪18が形
成されている。係止爪18は、図8に示すように、前述
した実施例と同様、凸条18aと凹条18bとを管軸方
向に交互にかつ連続的に形成するとともに、凸条18a
の稜線部を1条おきに切除して平坦面18cとしたもの
である。As shown in FIG. 7, the pipe joint of this embodiment has a pair of upper and lower detachment preventing members 27, 27 each having a half-cylindrical shape.
Similar to the above-mentioned embodiment, a part of the locking pieces 28 and 28 are locking pieces 28, and the locking claws 18 are formed on the entire inner peripheral surfaces of both locking pieces 28. As shown in FIG. 8, the locking claw 18 has convex ridges 18a and concave ridges 18b formed alternately and continuously in the pipe axis direction, as in the above-described embodiment, and the convex ridges 18a are formed.
The ridge line is cut every other line to form a flat surface 18c.
【0038】両離脱防止体27における係止片28の対
向面に所定寸法離間して形成されたフランジ部29同士
を、ボルト30とナット31とをもって締付けることに
より、樹脂被覆層26に係止爪18の凸条18aが食い
込んで流体管Bの離脱防止は図られるが、ナット31を
過大に締め付けたとしても、図9に示すように平坦面1
8cが樹脂被覆層26の外周面に当接するので、凸条1
8aの先端が鋼管25まで達することはない。これによ
り、この第2実施例においても、上述した第1実施例と
同様の作用効果が得られる。The flanges 29 formed on the facing surfaces of the locking pieces 28 of the two detachment prevention bodies 27 with a predetermined distance from each other are tightened with bolts 30 and nuts 31, thereby locking the resin coating layer 26 with the locking claws. Although the ridges 18a of the 18 bite in to prevent the fluid pipe B from coming off, even if the nut 31 is excessively tightened, as shown in FIG.
Since 8c contacts the outer peripheral surface of the resin coating layer 26, the ridges 1
The tip of 8a does not reach the steel pipe 25. As a result, also in the second embodiment, the same operational effect as that of the first embodiment described above can be obtained.
【0039】なお、第2実施例でも、係止爪18の形状
を、前述した図6に示すのと同様、凸条18aを所定の
長さずつ間欠的に切除して、短寸の平坦面と凸条とを交
互に形成してもよく、このようにすると、流体管Bが管
軸回りに回転するのが防止される。In the second embodiment as well, the shape of the locking claw 18 is similar to that shown in FIG. 6 described above, and the ridges 18a are intermittently cut by a predetermined length to form a short flat surface. And ridges may be formed alternately. By doing so, the fluid pipe B is prevented from rotating around the pipe axis.
【0040】図10〜図12は、本発明の第3実施例を
示す。10 to 12 show a third embodiment of the present invention.
【0041】上述した各実施例では、係止爪18の形状
を変更して、樹脂被覆層26への食い込み量を規制して
いるのに対し、この第3実施例においては、係止爪18
の形状を変えないで、その食い込み量を規制しうるよう
にしたものである。In each of the above-described embodiments, the shape of the locking claw 18 is changed to regulate the amount of bite into the resin coating layer 26, whereas in the third embodiment, the locking claw 18 is used.
The amount of bite can be regulated without changing the shape of.
【0042】すなわち、図10においては、上下のフラ
ンジ部29、29の互いの対向面のいずれか一方(実施
例では上側)に、ボルト30が挿通可能な円筒形のスペ
ーサ32が一体的に連接されている。スペーサ32の長
さは、上下の離脱防止体27を流体管A、Bの接続部に
装着して、係止爪18の先端を流体管Bの外周面に当接
させたとき、スペーサ32の先端(下端)と下方のフラ
ンジ部29との間に、樹脂被覆層26の厚さよりも小さ
い隙間が形成される寸法に定めてある。That is, in FIG. 10, a cylindrical spacer 32 into which the bolt 30 can be inserted is integrally connected to either one of the facing surfaces of the upper and lower flange portions 29, 29 (upper side in the embodiment). Has been done. The length of the spacer 32 is such that when the upper and lower separation preventive members 27 are attached to the connecting portions of the fluid pipes A and B and the tip of the locking claw 18 is brought into contact with the outer peripheral surface of the fluid pipe B. The size is set so that a gap smaller than the thickness of the resin coating layer 26 is formed between the tip (lower end) and the lower flange portion 29.
【0043】上下のフランジ部29同士をボルト30と
ナット31とにより締め付けると、係止爪18は除々に
樹脂被覆層26に食い込むこととなるが、スペーサ32
が下方のフランジ部29に当接すると、両係止片28は
縮径方向へ移動しなくなり、それ以上の締め付けは不可
能となる。従って、図11に示すように係止爪18が鋼
管25まで到達するのが防止される。When the upper and lower flange portions 29 are tightened by the bolts 30 and the nuts 31, the locking claws 18 gradually bite into the resin coating layer 26, but the spacer 32
When the lower end contacts the lower flange portion 29, both locking pieces 28 do not move in the diameter reducing direction, and further tightening is impossible. Therefore, as shown in FIG. 11, the locking claw 18 is prevented from reaching the steel pipe 25.
【0044】なお、この実施例では部品管理や配管作業
等を容易とするために、スペーサ32をフランジ部29
と一体的に設けてあるが、別体でもよいのは勿論であ
る。In this embodiment, in order to facilitate the parts management and the piping work, the spacer 32 is attached to the flange portion 29.
Although it is provided integrally with, of course, it may be a separate body.
【0045】図12は、上記とは異なる構造の公知の管
継手であり、この実施例においても、上下のフランジ部
29の対向面間に円筒状のスペーサ32を設けて、内周
面に形成した係止爪18の樹脂被覆層26への食い込み
を規制するようにしたものである。FIG. 12 shows a known pipe joint having a structure different from that described above. Also in this embodiment, a cylindrical spacer 32 is provided between the facing surfaces of the upper and lower flange portions 29 to form the inner peripheral surface. The engagement of the locking claw 18 with the resin coating layer 26 is restricted.
【0046】以上、本発明の実施例を図面により説明し
てきたが、具体的な構成はこれら実施例に限られるもの
ではなく、本発明の要旨を逸脱しない範囲における変更
や追加があっても本発明に含まれる。The embodiments of the present invention have been described above with reference to the drawings. However, the specific structure is not limited to these embodiments, and even if there are changes and additions within the scope not departing from the gist of the present invention, the present invention is not limited. Included in the invention.
【0047】[0047]
【発明の効果】本発明によれば、次のような効果を得る
ことができる。According to the present invention, the following effects can be obtained.
【0048】(a)請求項1の発明によれば、凸条に形
成した平坦面が係止爪の樹脂被覆層への食い込み量を規
制し、内部の金属製流体管と金属同士で接触するのを防
止するので、流体管に電食や腐食等が発生する恐れはな
い。(A) According to the first aspect of the present invention, the flat surface formed on the ridge regulates the amount of engagement of the locking claw into the resin coating layer, and the metal fluid pipe inside is in contact with the metal. Since it is prevented, there is no possibility that electrolytic corrosion or corrosion will occur in the fluid pipe.
【0049】(b)請求項2の発明によれば、流体管の
離脱防止と樹脂被覆層の剥離防止効果が高まる。(B) According to the invention of claim 2, the effect of preventing the fluid pipe from separating and the effect of preventing the resin coating layer from peeling off are enhanced.
【0050】(c)請求項3の発明によれば、流体管が
管軸回りに回転するのが防止される。(C) According to the invention of claim 3, the fluid pipe is prevented from rotating around the pipe axis.
【0051】(d)請求項4の発明によれば、スペーサ
により係止爪の食い込み量を規制しうるので、上記
(a)と同様の効果が得られる。(D) According to the invention of claim 4, since the amount of engagement of the locking claw can be regulated by the spacer, the same effect as the above (a) can be obtained.
【0052】(e)請求項5の発明によれば、スペーサ
の部品管理や配管作業等が容易になる。(E) According to the fifth aspect of the invention, spacer component management, piping work, etc. are facilitated.
【0053】[0053]
【図1】本発明の第1実施例を示す中央縦断側面図であ
る。FIG. 1 is a central longitudinal sectional side view showing a first embodiment of the present invention.
【図2】図1におけるA−A線断面図である。FIG. 2 is a sectional view taken along line AA in FIG.
【図3】係止爪の拡大斜視図である。FIG. 3 is an enlarged perspective view of a locking claw.
【図4】係止爪と流体管との接触部の要部の拡大縦断面
図である。FIG. 4 is an enlarged vertical cross-sectional view of a main part of a contact portion between a locking claw and a fluid pipe.
【図5】同じく係止爪の食い込み時の要部の拡大縦断面
図である。FIG. 5 is an enlarged vertical cross-sectional view of the main part when the engaging claws bite into the same.
【図6】係止爪の変形例を示す拡大斜視図である。FIG. 6 is an enlarged perspective view showing a modified example of the locking claw.
【図7】本発明の第2実施例を示す一部切欠側面図であ
る。FIG. 7 is a partially cutaway side view showing a second embodiment of the present invention.
【図8】係止爪の要部の拡大斜視図である。FIG. 8 is an enlarged perspective view of a main part of a locking claw.
【図9】係止爪の食い込み時を示す要部の拡大縦断面図
である。FIG. 9 is an enlarged vertical cross-sectional view of a main part showing a state where the locking claw is biting.
【図10】本発明の第3実施例を示す一部切欠側面図で
ある。FIG. 10 is a partially cutaway side view showing a third embodiment of the present invention.
【図11】同じく係止爪の食い込み時を示す要部の拡大
縦断面図である。FIG. 11 is an enlarged vertical cross-sectional view of a main part of the engagement pawl when it is biting into the pawl.
【図12】同じく異なる形状の管継手の別実施例を示す
縦断正面図である。FIG. 12 is a vertical sectional front view showing another embodiment of the pipe joint having the same different shape.
【図13】従来例を示す要部の縦断側面図である。FIG. 13 is a vertical cross-sectional side view of a main part showing a conventional example.
【図14】同じく係止刃の食い込み時を示す拡大断面図
である。FIG. 14 is likewise an enlarged cross-sectional view showing the engagement of the locking blade.
【符号の説明】 A、B 流体管 1 受口部 2 挿口部 3 鍔 4 パッキン 5 離脱防止体 6 環状基部 7 上部受部 8 下部受部 9 係止部 10 鉛直壁部 11 庇部 12 内面 13 貫通孔 14 内面 15、15 係止片 16 摺動片 17 外面 18 係止爪 18a 凸条 18b 凹条 18c 平坦面 19 上面 20 下面 21 貫通孔 22 締結具(手段) 23 ボルト 24 ナット 25 鋼管 26、26’ 樹脂被覆層 27 離脱防止体 28 係止片 29 フランジ部 30 ボルト 31 ナット 32 スペーサ[Explanation of symbols] A, B Fluid pipe 1 Receptacle part 2 Insertion part 3 Collar 4 Packing 5 Separation preventive body 6 Annular base 7 Upper receiving part 8 Lower receiving part 9 Locking part 10 Vertical wall part 11 Eave part 12 Inner surface 13 through hole 14 inner surface 15, 15 locking piece 16 sliding piece 17 outer surface 18 locking claw 18a convex line 18b concave line 18c flat surface 19 upper surface 20 lower surface 21 through hole 22 fastener (means) 23 bolt 24 nut 25 steel pipe 26 , 26 'Resin coating layer 27 Detachment prevention body 28 Locking piece 29 Flange portion 30 Bolt 31 Nut 32 Spacer
Claims (5)
内に、外周面が合成樹脂材による被覆層により覆われた
金属製流体管の端部の挿口部を挿入し、前記受口部に外
嵌して係合された離脱防止体における係止片を挿口部の
外周面に圧接することにより、両流体管同士を接続する
ようにした離脱防止管継手において、 前記係止片における内面に、円周方向を向く複数の凸条
と凹条とからなり、かつ一部の凸条の稜線部を、前記合
成樹脂材の被覆層の厚さよりも小さい寸法だけ切除して
平坦面とした係止爪を設けたことを特徴とする離脱防止
管継手。1. An insertion port at the end of a metal fluid pipe whose outer peripheral surface is covered with a coating layer made of a synthetic resin material is inserted into a receiving port formed at the end of one fluid pipe, A separation prevention pipe joint configured to connect both fluid pipes to each other by press-contacting a locking piece of a separation prevention body externally fitted and engaged with the receiving opening portion to the outer peripheral surface of the insertion opening portion, On the inner surface of the stopper, consisting of a plurality of convex stripes and concave stripes facing in the circumferential direction, and cutting off the ridge line part of some convex stripes by a size smaller than the thickness of the coating layer of the synthetic resin material. A disconnection prevention pipe joint, characterized in that a locking claw having a flat surface is provided.
つ連続的に形成されている請求項1に記載の離脱防止管
継手。2. The separation preventing pipe joint according to claim 1, wherein the convex stripes and the concave stripes are formed alternately and continuously in the pipe axial direction.
ずつ間欠的に切除されている請求項1または2に記載の
離脱防止管継手。3. The separation prevention pipe joint according to claim 1, wherein the ridgeline portion of the ridge is intermittently cut by a predetermined length in the circumferential direction.
内に、外周面が合成樹脂材による被覆層により覆われた
金属製流体管の端部の挿口部を挿入し、前記受口部に外
嵌して係合された1対の離脱防止体における係止片を挿
口部の外周面に当接させ、両離脱防止体の対向端面に互
いに所定寸法離間させて設けたフランジ部同士を、締結
手段をもって締め付けることにより、前記係止片に形成
した係止爪を前記合成樹脂材の被覆層に食い込ませ、流
体管同士を接続するようにした離脱防止管継手におい
て、 前記互いに対向するフランジ部の適所に、係止片の縮径
方向への移動量を制限し、係止爪の被覆層への食い込み
量を規制するスペーサを設けたことを特徴とする離脱防
止管継手。4. An insertion port at the end of a metal fluid pipe whose outer peripheral surface is covered with a coating layer made of a synthetic resin material is inserted into a receiving port formed at the end of one fluid pipe, The locking pieces of the pair of separation preventing bodies which are externally fitted and engaged with the receiving opening are brought into contact with the outer peripheral surfaces of the insertion opening, and are provided on the opposite end surfaces of the separation preventing bodies with a predetermined distance therebetween. In the disconnection prevention pipe joint, wherein the flange portions are tightened with a fastening means so that the locking claws formed on the locking pieces bite into the coating layer of the synthetic resin material to connect the fluid pipes to each other. A separation prevention pipe joint characterized in that spacers are provided at appropriate positions of the flange portions facing each other to limit the amount of movement of the locking pieces in the diameter reducing direction and regulate the amount of engagement of the locking claws into the coating layer. .
れか一方に、一体的に設けられている請求項4に記載の
離脱防止管継手。5. The separation prevention pipe joint according to claim 4, wherein the spacer is integrally provided on either one of the facing flange portions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17945495A JP3392988B2 (en) | 1995-06-22 | 1995-06-22 | Captive fittings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17945495A JP3392988B2 (en) | 1995-06-22 | 1995-06-22 | Captive fittings |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0914541A true JPH0914541A (en) | 1997-01-17 |
JP3392988B2 JP3392988B2 (en) | 2003-03-31 |
Family
ID=16066147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17945495A Expired - Fee Related JP3392988B2 (en) | 1995-06-22 | 1995-06-22 | Captive fittings |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3392988B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1134502A2 (en) * | 2000-03-14 | 2001-09-19 | Ooms Avenhorn Holding B.V. | System for fixing tubes, hoses or other conduits in a road surface |
US6839603B2 (en) | 2000-05-09 | 2005-01-04 | Tokyo Electron Limited | Semiconductor manufacturing system and control method thereof |
JP2008151203A (en) * | 2006-12-15 | 2008-07-03 | Bridgestone Flowtech Corp | Lock ring for pipe joint, and pipe joint |
JP2009133446A (en) * | 2007-11-30 | 2009-06-18 | Maezawa Kyuso Industries Co Ltd | Pipe fitting |
JP2010261480A (en) * | 2009-04-30 | 2010-11-18 | Waterworks Technology Development Organization Co Ltd | Reinforcing metal fitting |
CN103384790A (en) * | 2010-11-30 | 2013-11-06 | 美卓矿物(瑞典)公司 | Metal pipe having an elastomeric coating, a coupling device and a system for transporting material in mineral processing plants |
JP2015169318A (en) * | 2014-03-10 | 2015-09-28 | コスモ工機株式会社 | Separation prevention device for fluid pipe |
JP2015172381A (en) * | 2014-03-11 | 2015-10-01 | コスモ工機株式会社 | Device for preventing removal of fluid pipe |
-
1995
- 1995-06-22 JP JP17945495A patent/JP3392988B2/en not_active Expired - Fee Related
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1134502A2 (en) * | 2000-03-14 | 2001-09-19 | Ooms Avenhorn Holding B.V. | System for fixing tubes, hoses or other conduits in a road surface |
EP1134502A3 (en) * | 2000-03-14 | 2001-12-12 | Ooms Avenhorn Holding B.V. | System for fixing tubes, hoses or other conduits in a road surface |
US6839603B2 (en) | 2000-05-09 | 2005-01-04 | Tokyo Electron Limited | Semiconductor manufacturing system and control method thereof |
JP2008151203A (en) * | 2006-12-15 | 2008-07-03 | Bridgestone Flowtech Corp | Lock ring for pipe joint, and pipe joint |
JP2009133446A (en) * | 2007-11-30 | 2009-06-18 | Maezawa Kyuso Industries Co Ltd | Pipe fitting |
JP2010261480A (en) * | 2009-04-30 | 2010-11-18 | Waterworks Technology Development Organization Co Ltd | Reinforcing metal fitting |
CN103384790A (en) * | 2010-11-30 | 2013-11-06 | 美卓矿物(瑞典)公司 | Metal pipe having an elastomeric coating, a coupling device and a system for transporting material in mineral processing plants |
JP2015169318A (en) * | 2014-03-10 | 2015-09-28 | コスモ工機株式会社 | Separation prevention device for fluid pipe |
JP2015172381A (en) * | 2014-03-11 | 2015-10-01 | コスモ工機株式会社 | Device for preventing removal of fluid pipe |
Also Published As
Publication number | Publication date |
---|---|
JP3392988B2 (en) | 2003-03-31 |
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