JP2000028060A - Separation preventing pipe joint - Google Patents
Separation preventing pipe jointInfo
- Publication number
- JP2000028060A JP2000028060A JP10191679A JP19167998A JP2000028060A JP 2000028060 A JP2000028060 A JP 2000028060A JP 10191679 A JP10191679 A JP 10191679A JP 19167998 A JP19167998 A JP 19167998A JP 2000028060 A JP2000028060 A JP 2000028060A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- peripheral surface
- split ring
- joint
- pipe joint
- 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
Abstract
Description
【発明の属する技術分野】本発明は、離脱防止管継手に
関する。TECHNICAL FIELD The present invention relates to a pipe joint for preventing separation.
【0001】[0001]
【従来の技術】接続される管の差口を、管継手の受口内
に挿入するだけで簡単に接続可能で、しかも離脱防止機
能を有する管継手として、特開平10−122461号
公報に記載されているものがある。この離脱防止管継手
は、円筒状の継手本体と、略Cリング状の離脱防止リン
グとを備えている。2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 10-122461 discloses a pipe joint which can be easily connected simply by inserting a spigot of a pipe to be connected into a socket of the pipe joint and has a detachment preventing function. There are things that are. The detachment prevention pipe joint includes a cylindrical joint main body and a substantially C-ring-shaped detachment prevention ring.
【0002】ところで、上記従来の離脱防止管継手で用
いられる離脱防止リングは、ステンレスなどの金属製の
ものか、あるいはポリアセタール樹脂製のものである。[0002] The detachment prevention ring used in the above-mentioned conventional detachment prevention pipe joint is made of metal such as stainless steel or made of polyacetal resin.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、ステン
レス製のものではその内周面に形成されている鋸歯状の
刃が硬すぎるため、たとえば挿入接続される管がポリエ
チレン樹脂管などのポリオレフィン樹脂管の場合、この
樹脂管の外周面を削ってしまうなど、著しく傷つけてし
まうため、その離脱防止効果は低かった。また、ステン
レス製の離脱防止リングの場合はその剛性が高すぎるが
ために、管継手の受口内への離脱防止リングの装着が困
難であった。However, in the case of stainless steel, the saw-toothed blade formed on the inner peripheral surface is too hard, so that, for example, the pipe to be inserted and connected is made of a polyolefin resin pipe such as a polyethylene resin pipe. In this case, the resin pipe was severely damaged, such as by shaving the outer peripheral surface thereof, and the detachment preventing effect was low. Further, in the case of a separation prevention ring made of stainless steel, the rigidity thereof is too high, so that it is difficult to mount the separation prevention ring in the socket of the pipe joint.
【0004】一方、ポリアセタール樹脂製のものは剛性
が低く、離脱防止リングとしては十分なものではなかっ
た。また、同樹脂製のものでは耐塩素水性に問題があ
り、このため、水道用配管の管継手として使用する場
合、その耐久性に問題があった。さらに、同樹脂製のも
のは耐薬品性、特に耐酸性に劣り、このような環境条件
を有する用途分野には適用することができなかった。[0004] On the other hand, those made of polyacetal resin have low rigidity and have not been sufficient as a separation prevention ring. Further, the resin-made resin has a problem in chlorine water resistance, and therefore has a problem in durability when used as a pipe joint for water supply piping. Furthermore, those made of the same resin are inferior in chemical resistance, especially acid resistance, and cannot be applied to application fields having such environmental conditions.
【0005】本発明の目的は、特にポリオレフィン樹脂
管の配管用の継手部材として、すぐれた機械的性質を有
する離脱防止リングを備えた離脱防止管継手を提供する
ことである。SUMMARY OF THE INVENTION An object of the present invention is to provide a pipe joint having a detachable ring having excellent mechanical properties, particularly as a joint member for piping a polyolefin resin pipe.
【0006】[0006]
【課題を解決するための手段】請求項1記載の発明は、
継手本体の開口端部側の内周面に設けられた環状凹溝内
にシール用ゴム輪が装着され、このゴム輪よりも奥側に
位置する継手本体の内周面が奥部に向かって拡径する傾
斜溝を有し、この傾斜溝内に、その内周面に略符合した
傾斜外周面を有する管締付け用の割りリングが遊嵌状態
で配置されてなる離脱防止管継手において、前記管締付
け用の割りリングが直鎖型ポリフェニレンサルファイド
樹脂から製されてなるものである。According to the first aspect of the present invention,
A rubber ring for sealing is mounted in an annular groove provided on the inner peripheral surface on the open end side of the joint body, and the inner peripheral surface of the joint body located on the back side of the rubber ring faces toward the back. A detachable pipe joint, comprising: an inclined groove having an enlarged diameter, and a split ring for pipe tightening having an inclined outer peripheral surface substantially matched with an inner peripheral surface thereof is arranged in a loosely fitted state in the inclined groove. The split ring for pipe fastening is made of a linear polyphenylene sulfide resin.
【0007】請求項2記載の発明は、請求項1記載の離
脱防止管継手において、直鎖型ポリフェニレンサルファ
イド樹脂の曲げ弾性率が3000〜5000MPa、ノ
ッチ付アイゾット衝撃強度が20J/m以上であるもの
である。According to a second aspect of the present invention, there is provided the pipe joint according to the first aspect, wherein the linear polyphenylene sulfide resin has a flexural modulus of 3000 to 5000 MPa and a notched Izod impact strength of 20 J / m or more. It is.
【0008】本発明においては、管締付け用の割りリン
グは、直鎖型ポリフェニレンサルファイド樹脂からたと
えば射出成形法にて製されてなるものであり、その内径
が自由状態において、挿入接続されるポリオレフィン管
の外径より少し小径とされ、その内周面の周方向に沿っ
て複数の係止突条(たとえば鋸歯状のもの)を備えてい
るのが望ましい。In the present invention, the split ring for pipe fastening is made of a linear polyphenylene sulfide resin by, for example, an injection molding method. It is desirable that the diameter is slightly smaller than the outer diameter of the inner peripheral surface and a plurality of locking ridges (for example, saw-tooth-shaped ones) are provided along the circumferential direction of the inner peripheral surface.
【0009】そして、本発明においては、直鎖型ポリフ
ェニレンサルファイド樹脂は、ASTM D−790に
よる曲げ弾性率が3000〜5000MPaの範囲のも
のが望ましい。この理由は、曲げ弾性率が3000MP
a未満では、管継手内に水圧がかかった際に、管締付け
用の割りリングが変形に追随できず割れてしまい、十分
な離脱防止効果が得られないからである。また、曲げ弾
性率が5000MPaを越えると、割りリングの剛性が
高くなりすぎて、継手本体の傾斜溝内への割りリングの
装着が困難となるからである。In the present invention, the linear polyphenylene sulfide resin preferably has a flexural modulus according to ASTM D-790 in the range of 3,000 to 5,000 MPa. The reason is that the flexural modulus is 3000MP.
If it is less than a, when water pressure is applied to the inside of the pipe joint, the split ring for pipe fastening cannot follow the deformation and breaks, failing to obtain a sufficient detachment prevention effect. On the other hand, if the flexural modulus exceeds 5000 MPa, the rigidity of the split ring becomes too high, making it difficult to mount the split ring in the inclined groove of the joint body.
【0010】また、直鎖型ポリフェニレンサルファイド
樹脂は、ASTM D−256によるノッチ付アイゾッ
ト衝撃強度が20J/m以上のものが望ましい。この理
由は、ノッチ付アイゾット衝撃強度が20J/m未満で
は、管継手内に水圧がかかった際に、管締付け用の割り
リングの係止突起の先端が割れるという問題が発生する
からである。The linear polyphenylene sulfide resin preferably has a notched Izod impact strength of 20 J / m or more according to ASTM D-256. The reason for this is that if the notched Izod impact strength is less than 20 J / m, there is a problem that the tip of the locking projection of the split ring for pipe tightening breaks when water pressure is applied to the pipe joint.
【0011】なお、直鎖型ポリフェニレンサルファイド
に、靱性改質剤や充填剤、顔料などの添加剤を適宜添加
してもよい。Incidentally, additives such as a toughness modifier, a filler and a pigment may be appropriately added to the linear polyphenylene sulfide.
【0012】[0012]
【発明の実施の形態】以下、本発明の離脱防止管継手の
実施の形態を図面に基づいて説明する。図1は本発明の
離脱防止管継手の第1実施例を示す半縦断面図、図2は
図1の離脱防止管継手の使用状態を示す半縦断面図であ
る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment of the present invention. FIG. 1 is a semi-longitudinal sectional view showing a first embodiment of a separation-preventing pipe joint of the present invention, and FIG. 2 is a semi-longitudinal cross-sectional view showing a use state of the separation preventing pipe joint of FIG.
【0013】離脱防止管継手1は、継手本体2と、管締
付け用の割りリング3と、シール用ゴム輪4とを備えて
いる。継手本体2はポリエチレン樹脂製の円筒状のもの
であり、その大径側の一端部は接続される樹脂管の挿入
口を備えたソケット状をしており、挿入口側の内周面に
環状凹溝21が設けられ、この環状凹溝21内にシール
用ゴム輪4が装着されている。このゴム輪4よりも奥側
に位置する継手本体2の内周面22は奥部に向かってテ
ーパ面状に拡径されて傾斜溝23とされている。The detachable pipe joint 1 includes a joint body 2, a split ring 3 for pipe tightening, and a rubber ring 4 for sealing. The joint body 2 has a cylindrical shape made of polyethylene resin, and has a large-diameter end having a socket-like shape provided with an insertion opening for a resin tube to be connected, and a ring-shaped inner peripheral surface on the insertion opening side. A concave groove 21 is provided, and the sealing rubber ring 4 is mounted in the annular concave groove 21. The inner peripheral surface 22 of the joint main body 2 located on the inner side of the rubber ring 4 is tapered toward the inner side to form an inclined groove 23 with its diameter increased.
【0014】この傾斜溝23内には、管締付け用の割り
リング3が遊嵌状態で配置されている。この割りリング
3はその管壁の一部が切り欠かれており、傾斜溝23の
内周面22にほぼ符合した傾斜外周面31を有してい
る。割りリング3は直鎖型ポリフェニレンサルファイド
樹脂から射出成形法にて成形されており、この場合、直
鎖型ポリフェニレンサルファイド樹脂はその曲げ弾性率
が3630MPa、ノッチ付アイゾット衝撃値が25J
/mの機械的性質を有しているものを使用した〔ポリプ
ラスチック株式会社の「フォートロン」(登録商標):
グレード0220U9〕。In the inclined groove 23, a split ring 3 for pipe tightening is arranged in a loosely fitted state. The split ring 3 has a part of the pipe wall cut out, and has a slanted outer peripheral surface 31 substantially matching the inner circumferential surface 22 of the slanted groove 23. The split ring 3 is formed by injection molding from a linear polyphenylene sulfide resin. In this case, the linear polyphenylene sulfide resin has a flexural modulus of 3630 MPa and a notched Izod impact value of 25 J.
/ M [mechanical properties] [Polytron (registered trademark) of Polyplastics Co., Ltd .:
Grade 0220U9].
【0015】割りリング3はその自由状態において、そ
の内径が後述する樹脂管5の差口51の外径より少し小
さくなるようにされており、その内周面に多数の鋸歯状
の係止突条32が設けられている。When the split ring 3 is in its free state, its inner diameter is made slightly smaller than the outer diameter of a spigot 51 of the resin tube 5 to be described later. A ridge 32 is provided.
【0016】つぎに上記離脱防止管継手1の使用状態を
図2に基づいて説明する。図において、樹脂管5、7は
ともに密度が0.940以上の高密度ポリエチレン樹脂
から押出成形されたものである。離脱防止管継手1の小
径側の端面には樹脂管7の一端面がバット融着されて、
離脱防止管継手1と樹脂管7とが一体化されている。そ
して、離脱防止管継手1の受口内に挿入接続される樹脂
管5の差口51の内周面側には短円筒状の補強部材6が
内挿されている。この補強部材6は耐蝕性を有するステ
ンレス鋼製のものである。Next, a use state of the above-mentioned separation preventing pipe joint 1 will be described with reference to FIG. In the figure, resin tubes 5 and 7 are both formed by extrusion molding from a high-density polyethylene resin having a density of 0.940 or more. One end face of the resin pipe 7 is butt-fused to the end face on the small diameter side of the detachment prevention pipe joint 1,
The detachable pipe joint 1 and the resin pipe 7 are integrated. A short-cylindrical reinforcing member 6 is inserted in the inner peripheral surface side of the spigot 51 of the resin pipe 5 inserted and connected into the socket of the detachment prevention fitting 1. The reinforcing member 6 is made of stainless steel having corrosion resistance.
【0017】補強部材6は、図2に示すように、短円筒
部61と折り返し部62とを備えており、短円筒部61
の外径は樹脂管5の内径とほぼ同じか、樹脂管5の内径
よりも少し小さくされている。短円筒部61の外周面に
は、すべり止め手段としての多数の小突起63が一体に
設けられている。折り返し部62は、短円筒部61の一
端部が外方に傘状に折り返されてテーパ面とされてい
る。そして、図に示すように、折り返し部62の先端が
樹脂管5の差口51端面の外周縁を囲繞するようになっ
ている。As shown in FIG. 2, the reinforcing member 6 has a short cylindrical portion 61 and a folded portion 62.
Is approximately the same as the inner diameter of the resin tube 5 or slightly smaller than the inner diameter of the resin tube 5. A large number of small projections 63 are integrally provided on the outer peripheral surface of the short cylindrical portion 61 as slip prevention means. The folded portion 62 has one end of the short cylindrical portion 61 folded outward in an umbrella shape to have a tapered surface. As shown in the figure, the tip of the folded portion 62 surrounds the outer peripheral edge of the end face of the spigot 51 of the resin tube 5.
【0018】そして、樹脂管5の差口51を離脱防止管
継手1の挿入口から奥側に向かって挿入すると、補強部
材6の折り返し部62の外周面のテーパ面64によって
割りリング3が押し広げられるので、奥側まで挿入する
ことができる。なお、継手本体2の受け口の奥部内周面
には、補強部材6の折り返し部62の外周面が当接する
当接段部24が形成されている。When the spigot 51 of the resin pipe 5 is inserted from the insertion opening of the separation-preventing pipe joint 1 toward the back, the split ring 3 is pushed by the tapered surface 64 of the outer peripheral surface of the folded portion 62 of the reinforcing member 6. Because it can be spread, it can be inserted to the far side. In addition, a contact step 24 with which the outer peripheral surface of the folded back portion 62 of the reinforcing member 6 comes into contact is formed on the inner peripheral surface at the back of the socket of the joint body 2.
【0019】この場合、割りリング3が、上述のとお
り、曲げ弾性率が3630MPa、ノッチ付アイゾット
衝撃値が25J/mの機械的性質を有している直鎖型ポ
リフェニレンサルファイド樹脂製のものであるので、拡
径によって塑性変形や割れを起こすことがなく、その弾
性復元力によって樹脂管5の外径より少し小さい内径の
元の自由状態まで縮径しようとする。In this case, the split ring 3 is made of a linear polyphenylene sulfide resin having mechanical properties such as a flexural modulus of 3630 MPa and a notched Izod impact value of 25 J / m, as described above. Therefore, plastic deformation or cracking does not occur due to the expansion, and the elastic restoring force attempts to reduce the diameter of the resin tube 5 to the original free state having an inner diameter slightly smaller than the outer diameter.
【0020】さらに、離脱防止管継手1は、折り返し部
62の先端が割りリング3より奥側まで挿入されると、
樹脂管5あるいは離脱防止管継手1に樹脂管5の抜け方
向の力が作用した場合、割りリング3の鋸歯状の係止突
条32の働きにより、樹脂管5の動きにともなって割り
リング3も挿入口側へ移動してその外周面31が傾斜溝
23のテーパ面22に押し当たり、割りリング3が縮径
する。したがって、樹脂管5の差口51の外周面が割り
リング3の内周面にしっかりと把持され、樹脂管5の抜
け止めが確実に行われる。Further, when the tip of the turn-back portion 62 is inserted farther than the split ring 3,
When a force in the pull-out direction of the resin pipe 5 is applied to the resin pipe 5 or the detachment prevention fitting 1, the action of the serrated locking ridge 32 of the split ring 3 causes the split ring 3 to move with the movement of the resin pipe 5. The outer ring 31 also moves to the insertion port side, and the outer peripheral surface 31 of the outer ring 31 is pressed against the tapered surface 22 of the inclined groove 23, so that the diameter of the split ring 3 is reduced. Therefore, the outer peripheral surface of the spigot 51 of the resin tube 5 is firmly gripped by the inner peripheral surface of the split ring 3, and the resin tube 5 is reliably prevented from coming off.
【0021】また、樹脂管5の差口51内に、補強部材
6の短円筒部61が圧入嵌合されることで、樹脂管5の
差口51が内側から補強されているので、割りリング3
やシール用ゴム輪4によって締付け力が長期間にわたっ
て継続して樹脂管5に加えられても、樹脂管5の差口5
1がコールドフローによって寸法変形を起こすことがな
い。しかも、補強部材6の短円筒部61の外周面にすべ
り止め手段としての多数の小突起63が一体に突設され
ているため、補強部材6を継手本体2内に残した状態で
樹脂管5の差口51がすべり抜けるというトラブルも確
実に防止できる。Further, since the short cylindrical portion 61 of the reinforcing member 6 is press-fitted into the spigot 51 of the resin pipe 5, the spigot 51 of the resin pipe 5 is reinforced from the inside. 3
Even if the tightening force is continuously applied to the resin pipe 5 for a long period of time by the rubber ring 4 for sealing,
1 does not cause dimensional deformation due to cold flow. Moreover, since a number of small projections 63 as anti-slipping means are integrally formed on the outer peripheral surface of the short cylindrical portion 61 of the reinforcing member 6, the reinforcing member 6 is left in the joint main body 2 while the resin pipe 5 remains. Can be reliably prevented from slipping out of the outlet 51.
【0022】本発明においては、上記の実施の形態に限
定されない。たとえば、上記実施例では、継手本体2の
一側にのみ樹脂管5を接続するようにしたが、継手本体
2の両側に樹脂管5を接続できる構造にしてもよい。The present invention is not limited to the above embodiment. For example, in the above embodiment, the resin pipe 5 is connected to only one side of the joint main body 2, but a structure in which the resin pipe 5 can be connected to both sides of the joint main body 2 may be adopted.
【0023】[0023]
【発明の効果】請求項1記載の本発明の離脱防止管継手
では、管締付け用の割りリングが直鎖型ポリフェニレン
サルファイド樹脂から製されているので、挿入接続され
る樹脂管の外周面によく食い込み、同樹脂管の抜け出し
をしっかりと防止することができる。According to the first aspect of the present invention, since the split ring for tightening the pipe is made of linear polyphenylene sulfide resin, the pipe joint is well fitted to the outer peripheral surface of the resin pipe to be inserted and connected. It is possible to firmly prevent biting and falling out of the resin tube.
【0024】請求項2記載の本発明では、管締付け用の
割りリングを構成している直鎖型ポリフェニレンサルフ
ァイド樹脂が、曲げ弾性率が3000〜5000MP
a、ノッチ付アイゾット衝撃値が20J/m以上という
機械的性質を有するものであるので、管締付け用の割り
リングは、離脱防止効果、すなわち、強度が大きく靱性
にすぐれ割れにも強く、また、耐塩素水性にもすぐれて
いるので、特に水道用のポリエチレン管の配管用の離脱
防止管継手として好適なものである。さらに、耐酸性に
もすぐれているので、耐薬品性の要求されるプラント配
管分野にも好適に適用することができる。According to the second aspect of the present invention, the linear polyphenylene sulfide resin constituting the split ring for pipe fastening has a flexural modulus of 3000 to 5000 MP.
a, Since the notched Izod impact value has a mechanical property of 20 J / m or more, the split ring for pipe tightening has a detachment preventing effect, that is, has a large strength, excellent toughness, and is resistant to cracking. Since it is also excellent in chlorine-resistant water resistance, it is particularly suitable as a separation prevention pipe joint for piping of polyethylene pipes for water supply. Furthermore, since it has excellent acid resistance, it can be suitably applied to the field of plant piping requiring chemical resistance.
【図1】本発明の管継手の第1実施例を示す半縦断面図
である。FIG. 1 is a semi-longitudinal sectional view showing a first embodiment of a pipe joint of the present invention.
【図2】図1の管継手の使用状態を示す半縦断面図であ
る。FIG. 2 is a semi-longitudinal sectional view showing a use state of the pipe joint of FIG. 1;
1 離脱防止管継手 2 継手本体 21 環状凹溝 22 内周面 23 傾斜溝 3 管締付け用の割りリング 31 傾斜外周面 32 鋸歯状の係止突条 4 シール用ゴム輪 5、7 樹脂管 51 差口 6 補強部材 61 短円筒部 62 折り返し部 63 小突起 DESCRIPTION OF SYMBOLS 1 Detachment prevention pipe joint 2 Joint main body 21 Annular concave groove 22 Inner peripheral surface 23 Inclined groove 3 Splitting ring for pipe tightening 31 Inclined outer peripheral surface 32 Serrated locking ridge 4 Rubber ring for sealing 5, 7 Resin pipe 51 Difference Mouth 6 Reinforcement member 61 Short cylindrical part 62 Folded part 63 Small projection
Claims (2)
れた環状凹溝内にシール用ゴム輪が装着され、このゴム
輪よりも奥側に位置する継手本体の内周面が奥部に向か
って拡径する傾斜溝を有し、この傾斜溝内に、その内周
面にほぼ符合した傾斜外周面を有する管締付け用の割り
リングが遊嵌状態で配置されてなる離脱防止管継手にお
いて、 前記管締付け用の割りリングが直鎖型ポリフェニレンサ
ルファイド樹脂から製されてなることを特徴とする離脱
防止管継手。A rubber ring for sealing is mounted in an annular groove provided on an inner peripheral surface on an opening end side of a joint body, and an inner peripheral surface of the joint body located deeper than the rubber ring is provided. It has an inclined groove whose diameter increases toward the back, and in this inclined groove, a split ring for pipe tightening having an inclined outer peripheral surface substantially matching the inner peripheral surface is arranged in a loosely fitted state to prevent detachment. The pipe joint according to claim 1, wherein the split ring for pipe tightening is made of a linear polyphenylene sulfide resin.
の曲げ弾性率が3000〜5000MPa、ノッチ付ア
イゾット衝撃強度が20J/m以上である請求項1記載
の離脱防止管継手。2. The detachable pipe joint according to claim 1, wherein the straight-chain polyphenylene sulfide resin has a flexural modulus of 3000 to 5000 MPa and an Izod notched impact strength of 20 J / m or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19167998A JP3658191B2 (en) | 1998-07-07 | 1998-07-07 | Detachment prevention pipe joint for polyethylene pipes for waterworks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19167998A JP3658191B2 (en) | 1998-07-07 | 1998-07-07 | Detachment prevention pipe joint for polyethylene pipes for waterworks |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000028060A true JP2000028060A (en) | 2000-01-25 |
JP3658191B2 JP3658191B2 (en) | 2005-06-08 |
Family
ID=16278663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19167998A Expired - Fee Related JP3658191B2 (en) | 1998-07-07 | 1998-07-07 | Detachment prevention pipe joint for polyethylene pipes for waterworks |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3658191B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007270930A (en) * | 2006-03-31 | 2007-10-18 | Hideo Suzuki | Joint mechanism |
KR100881351B1 (en) * | 2008-07-25 | 2009-02-03 | 신우산업주식회사 | Expanding pipe with separation prevention structure |
WO2013137241A1 (en) * | 2012-03-14 | 2013-09-19 | 株式会社栗本鐵工所 | Pipe joint structure |
-
1998
- 1998-07-07 JP JP19167998A patent/JP3658191B2/en not_active Expired - Fee Related
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007270930A (en) * | 2006-03-31 | 2007-10-18 | Hideo Suzuki | Joint mechanism |
WO2007116606A1 (en) * | 2006-03-31 | 2007-10-18 | Hideo Suzuki | Joint mechanism |
US7954860B2 (en) | 2006-03-31 | 2011-06-07 | Hideo Suzuki | Coupling mechanism |
KR100881351B1 (en) * | 2008-07-25 | 2009-02-03 | 신우산업주식회사 | Expanding pipe with separation prevention structure |
WO2013137241A1 (en) * | 2012-03-14 | 2013-09-19 | 株式会社栗本鐵工所 | Pipe joint structure |
JP2013190049A (en) * | 2012-03-14 | 2013-09-26 | Kurimoto Ltd | Pipe joint structure |
TWI582326B (en) * | 2012-03-14 | 2017-05-11 | 栗本鐵工所股份有限公司 | Pipe coupling structure |
Also Published As
Publication number | Publication date |
---|---|
JP3658191B2 (en) | 2005-06-08 |
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