JP2002061783A - Pipe separation preventing device - Google Patents
Pipe separation preventing deviceInfo
- Publication number
- JP2002061783A JP2002061783A JP2000246874A JP2000246874A JP2002061783A JP 2002061783 A JP2002061783 A JP 2002061783A JP 2000246874 A JP2000246874 A JP 2000246874A JP 2000246874 A JP2000246874 A JP 2000246874A JP 2002061783 A JP2002061783 A JP 2002061783A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- retaining
- retaining ring
- divided
- tube portion
- 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 Allowing Movement (AREA)
- Joints With Sleeves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水道管やガス管等
の流体輸送管同士、或いは、流体輸送管と仕切弁とを接
続する管離脱防止装置で、詳しくは、合成樹脂製の受口
管部と合成樹脂製の挿入管部とを設定角度範囲内で相対
揺動自在に密封状態で接続する管離脱防止装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe separation preventing device for connecting fluid transport pipes such as water pipes and gas pipes, or connecting a fluid transport pipe and a gate valve. The present invention relates to a pipe detachment prevention device for connecting a pipe section and a synthetic resin insertion pipe section in a sealed state so as to be relatively swingable within a set angle range.
【０００２】[0002]
【従来の技術】従来の管離脱防止装置では、図１１、図
１２に示すように、合成樹脂製の受口管部１と、これに
対して相対揺動自在に挿入接続される合成樹脂製の挿入
管部２とのうち、前記受口管部１の内周面に、挿入管部
２の外周面との間を密封するための弾性シール材３を保
持する環状のシール保持部１ｂと、挿入管部２の外周面
との間に両管部１，２の設定角度範囲内での相対揺動を
許容するための環状空間Ｓを現出するテーパー面１ｃと
が形成されているとともに、前記挿入管部２に対して脱
着自在に外套固定される抜止め輪体Ａが、円周方向で二
分割された半円弧状の分割抜止め体２０と、各分割抜止
め体２０の両端部に形成された連結フランジ部２０ａの
うちの相対向するもの同士を締付け連結するボルト２１
・ナット２２とから構成されている。2. Description of the Related Art In a conventional pipe detachment prevention device, as shown in FIGS. 11 and 12, a synthetic resin receiving pipe section 1 and a synthetic resin receiving pipe section 1 inserted and connected to the receiving pipe section 1 so as to be able to swing relative thereto. And an annular seal holding portion 1b for holding an elastic seal material 3 for sealing between the inner peripheral surface of the receiving tube portion 1 and the outer peripheral surface of the insertion tube portion 2. And a tapered surface 1c that exposes an annular space S for allowing relative swing within a set angle range of the two tube portions 1 and 2 is formed between the outer peripheral surface of the insertion tube portion 2 and the outer circumferential surface of the insertion tube portion 2. A retaining ring A, which is detachably fixed to the insertion tube portion 2 in a detachable manner, is divided into two semicircular arc-shaped retaining members 20 in the circumferential direction, and both ends of each retaining member 20 are separated. Bolt 21 for tightening and connecting opposing ones of the connecting flange portions 20a formed in the portion
-It is comprised from the nut 22.
【０００３】また、前記抜止め輪体Ａの内周面には、挿
入管部２の外周面に喰込み可能な半円弧状の一対の抜止
め部材４を保持する周溝状の抜止め保持部５ａ形成さ
れ、この抜止め保持部５ａの内周面には、受口管部１と
挿入管部２との相対離脱移動に連れて抜止め部材４を縮
径側に弾性変形させるカム面５ｂが形成されているとと
もに、前記各分割抜止め体２０の受口管部１側の端部に
は、挿入接続された両管部１，２に引抜き方向の外力が
作用したとき、受口管部１の外周面のうち、シール保持
部１ｂの膨出形成箇所に相当する***部１ｄに管軸芯Ｘ
方向から接当して両管部１，２の相対離脱移動を阻止す
る係止部２０ａが一体形成されている。[0003] Further, on the inner peripheral surface of the retaining ring A, a circumferential groove-shaped retaining retaining member for retaining a pair of semi-circular arc-shaped retaining members 4 that can bite into the outer peripheral surface of the insertion tube portion 2. A cam surface on the inner peripheral surface of the retaining portion 5a for elastically deforming the retaining member 4 to a reduced diameter side with the relative detachment movement between the receiving tube portion 1 and the insertion tube portion 2. 5b is formed, and at the end of each of the divided stoppers 20 on the side of the receiving tube portion 1, when an external force in the pulling direction acts on both the tube portions 1 and 2 inserted and connected, the receiving port is formed. On the outer peripheral surface of the tube portion 1, a protruding portion 1 d corresponding to a bulging portion of the seal holding portion 1 b is attached to the tube axis X.
An engaging portion 20a which comes into contact with from the direction and prevents the relative detachment movement of the two tube portions 1 and 2 is integrally formed.
【０００４】[0004]
【発明が解決しようとする課題】従来の管離脱防止装置
では、挿入管部２の外周面に外套された抜止め輪体Ａの
両分割抜止め体２０同士をガタツキの無い状態で強固に
締付け固定することにより、不同沈下や地震等に起因し
て、受口管部１と挿入管部２とに相対離脱方向の引張力
が作用したとき、その相対離脱移動に連れて抜止め部材
４を縮径側に迅速、適確に弾性変形させて、受口管部１
と挿入管部２との離脱防止効果を高める必要がある。In the conventional pipe detachment prevention device, the two split retaining members 20 of the retaining ring A, which are jacketed on the outer peripheral surface of the insertion tube portion 2, are firmly tightened without rattling. By fixing, when the tensile force in the relative detachment direction acts on the receiving pipe portion 1 and the insertion tube portion 2 due to uneven settlement or an earthquake, the retaining member 4 is moved with the relative detachment movement. Elastic deformation quickly and accurately to the reduced diameter side,
It is necessary to enhance the effect of preventing separation from the insertion tube 2.
【０００５】しかし、挿入管部２の外周面に両分割抜止
め体２０を強固に締付け固定すると、挿入管部２と両分
割抜止め体２０とが実質的に一体化されるため、各分割
抜止め体２０の受口管部１側の端部に一体形成された係
止部２０ａと、受口管部１の外周面側に膨出形成される
***部１ｄとの直径方向での係合代を大きくすると、両
管部１，２の相対離脱移動を強力に阻止することができ
るものの、不同沈下や地震等に起因して、受口管部１と
挿入管部２とに屈曲方向の外力が作用したとき、両管部
１，２の許容揺動角度範囲の途中で分割抜止め体２０の
先端部が受口管部１の外周面に接当するため、両管部
１，２の揺動角度範囲が制限される問題があった。[0005] However, when the two split retaining members 20 are firmly fastened and fixed to the outer peripheral surface of the insertion tube portion 2, the insertion tube portion 2 and the two split retaining members 20 are substantially integrated, so that each divided retaining member 20 is integrated. The engagement in the diametrical direction between the locking portion 20a integrally formed at the end of the retaining body 20 on the side of the receiving tube portion 1 and the raised portion 1d bulging out on the outer peripheral surface side of the receiving tube portion 1. When the joint is increased, the relative disengagement of the two pipe sections 1 and 2 can be strongly prevented, but the bending direction of the receiving pipe section 1 and the insertion pipe section 2 due to uneven settlement or earthquake, etc. When the external force is applied, the tip of the split retaining body 20 comes into contact with the outer peripheral surface of the receiving pipe 1 in the middle of the allowable swing angle range of the two pipes 1, 2. 2 has a problem that the swing angle range is limited.
【０００６】本発明は、上述の実状に鑑みて為されたも
のであって、その主たる課題は、抜止め輪体の合理的な
改造をもって、挿入管部の外周面に抜止め輪体を強固に
締付け固定し、かつ、抜止め輪体の係止部と受口管部の
外周面側の***部との直径方向での係合代を大きくし
て、受口管部と挿入管部との離脱防止効果を高めながら
も、両管部の許容揺動角度範囲内での相対揺動に無理な
くスムーズに追従することのできる管離脱防止装置を提
供する点にある。SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and a main problem thereof is that, with a rational modification of the retaining ring, the retaining ring is firmly attached to the outer peripheral surface of the insertion tube portion. And the engagement margin in the diametric direction between the locking portion of the retaining ring and the raised portion on the outer peripheral surface side of the receiving tube is increased, so that the receiving tube and the insertion tube are Another object of the present invention is to provide a pipe detachment prevention device which can smoothly follow the relative swing of the two pipe portions within the allowable swing angle range while enhancing the detachment prevention effect.
【０００７】[0007]
【課題を解決するための手段】本発明の請求項１による
特徴構成は、合成樹脂製の受口管部と、これに対して相
対揺動自在に密封状態で挿入接続される合成樹脂製の挿
入管部とのうち、前記挿入管部の外周面に対して脱着自
在に外套固定される抜止め輪体の内周面に、挿入管部の
外周面に喰込み可能な抜止め部材が設けられているとと
もに、前記抜止め輪体には、挿入接続された両管部に引
抜力が作用したとき、受口管部の外周面側の***部に管
軸芯方向から接当して両管部の引抜き移動を阻止する係
止部が形成されている管離脱防止装置であって、前記抜
止め輪体が、抜止め部材の保持部を備えた第１抜止め輪
体と、前記係止部を備えた第２抜止め輪体とに管軸芯方
向で分割されているとともに、前記受口管部と挿入管部
との設定揺動範囲内での相対揺動を許容する状態で、第
１抜止め輪体と第２抜止め輪体とを屈曲自在に連結する
屈曲連結手段が設けられている点にある。According to a first aspect of the present invention, there is provided a synthetic resin receiving pipe portion, and a synthetic resin receiving tube portion inserted and connected to the sealing tube so as to be swingable relative to the receiving tube portion. Of the insertion tube portion, a retaining member is provided on an inner peripheral surface of a retaining ring which is detachably fixed to the outer peripheral surface of the insertion tube portion so as to be detachably attached to the outer peripheral surface of the insertion tube portion. When a pulling force is applied to the two pipe portions inserted and connected to the retaining ring, the protrusion ring on the outer peripheral surface side of the receiving pipe portion comes into contact with the raised portion on the outer peripheral surface side from the pipe axis direction, and both of the stopper ring members are in contact with each other. A device for preventing detachment of a tube, wherein a locking portion for preventing a pull-out movement of a tube portion is formed, wherein the retaining ring has a first retaining ring provided with a retaining portion for a retaining member; A second rocking stopper provided with a stop portion, which is divided in the axial direction of the tube axis, and wherein a set swing range of the receiving tube portion and the insertion tube portion is set; A state which permits relative swinging in, in that the bent coupling means for bendably connecting the first retainer ring member and a second retaining ring body is provided.
【０００８】上記特徴構成によれば、前記抜止め輪体を
構成する第１抜止め輪体と第２抜止め輪体とのうち、抜
止め部材の保持部を備えた第１抜止め輪体を、挿入管部
の外周面にガタツキの無い状態で強固に外套固定するこ
とにより、不同沈下や地震等に起因して、受口管部と挿
入管部とに相対離脱方向の引張力が作用したとき、その
相対離脱移動に連れて抜止め部材を挿入管部の外周面に
迅速、強力に喰い込ませて、受口管部と挿入管部との離
脱防止効果の向上を図ることができる。[0010] According to the above-mentioned characteristic structure, the first retaining ring of the first retaining ring and the second retaining ring constituting the retaining ring has a retaining portion for retaining the retaining member. Is firmly fixed to the outer peripheral surface of the insertion tube without rattling, so that a tensile force in the relative detachment direction acts on the receiving tube and the insertion tube due to uneven settlement, earthquake, etc. When doing so, the retaining member is quickly and strongly bitten into the outer peripheral surface of the insertion tube portion with the relative disengagement movement, and the effect of preventing separation between the receiving tube portion and the insertion tube portion can be improved. .
【０００９】更に、前記第２抜止め輪体の係止部と受口
管部の外周面側の***部との直径方向での係合代を大き
くして、受口管部と挿入管部とに相対離脱方向の引張力
が作用したときの離脱防止効果を高めながらも、第１抜
止め輪体と第２抜止め輪体とが屈曲連結手段を介して屈
曲自在に連結されているから、不同沈下や地震等に起因
して、受口管部と挿入管部とに屈曲方向の曲げ外力が作
用したときでも、その曲げ外力による両管部の設定揺動
範囲内での相対揺動に対して、第１抜止め輪体と第２抜
止め輪体とが無理なくスムーズに追従して屈曲するか
ら、従来のように抜止め輪体の一部で両管部の揺動範囲
を制限することを抑制することができる。Further, the engagement in the diametrical direction between the locking portion of the second retaining ring and the raised portion on the outer peripheral surface side of the receiving tube portion is increased, so that the receiving tube portion and the insertion tube portion are formed. The first retaining ring and the second retaining ring are flexibly connected to each other through the bending coupling means while enhancing the effect of preventing the detachment when a tensile force in the relative detachment direction acts on the first and second retaining rings. Even when external bending force in the bending direction acts on the receiving pipe and the insertion pipe due to uneven settlement or earthquake, relative swing within the set rocking range of both pipes due to the bending external force On the other hand, since the first retaining ring and the second retaining ring follow and bend smoothly and smoothly, the swing range of both pipes can be limited by a part of the retaining ring as in the related art. Limiting can be suppressed.
【００１０】従って、前記抜止め輪体を屈曲自在に連結
された上述の第１・第２抜止め輪体から構成するだけの
簡単かつ経済的な改造をもって、挿入管部の外周面に抜
止め輪体を強固に締付け固定し、かつ、抜止め輪体の係
止部と受口管部の外周面側の***部との直径方向での係
合代を大きくして、受口管部と挿入管部との離脱防止効
果を高めながらも、両管部の許容揺動角度範囲内での相
対揺動に抜止め輪体が無理なくスムーズに屈曲追従する
ことができるから、両管部の揺動角度範囲が制限される
ことがなく、不同沈下や地震等に起因して受口管部と挿
入管部とに作用する屈曲方向の曲げ外力を良好に吸収す
ることができる。Therefore, with simple and economical modification, the retaining ring is constituted by the above-mentioned first and second retaining rings which are flexibly connected to each other, and the retaining ring is retained on the outer peripheral surface of the insertion tube portion. The ring body is firmly tightened and fixed, and the engagement margin in the diametric direction between the locking portion of the retaining ring and the raised portion on the outer peripheral surface side of the receiving pipe portion is increased, so that the receiving pipe portion and While improving the effect of preventing separation from the insertion tube, the retaining ring can smoothly and flexibly follow the relative swing within the allowable swing angle range of both tubes, so that the The swing angle range is not limited, and the bending external force acting on the receiving pipe portion and the insertion pipe portion in the bending direction due to uneven settlement or earthquake can be favorably absorbed.
【００１１】本発明の請求項２による管離脱防止装置の
特徴構成は、前記屈曲連結手段に、受口管部と挿入管部
との管軸芯方向での一定範囲内での伸縮移動を許容する
融通が設けられている点にある。[0011] The characteristic feature of the pipe detachment preventing device according to the second aspect of the present invention is that the bending connection means allows the expansion and contraction movement of the receiving pipe section and the insertion pipe section within a certain range in the pipe axis direction. The point is that there is a flexibility to provide.
【００１２】上記特徴構成によれば、不同沈下や地震等
に起因して、受口管部と挿入管部とに相対離脱方向の引
張力が作用したとき、屈曲連結手段に設けた融通の範囲
内で受口管部と挿入管部とが管軸芯方向に相対移動する
ことができるから、不同沈下や地震等に起因して受口管
部と挿入管部とに作用する引張方向の外力を吸収して、
両管部の離脱防止効果を高めることができる。[0012] According to the above-mentioned characteristic configuration, when a tensile force in the relative detachment direction acts on the receiving pipe portion and the insertion pipe portion due to uneven settlement, an earthquake, or the like, the range of flexibility provided in the bending connection means is provided. Since the receiving tube and the insertion tube can move relative to each other in the axial direction of the tube inside, the external force in the tensile direction acting on the receiving tube and the insertion tube due to uneven settlement or earthquake Absorb
The detachment prevention effect of both pipe parts can be enhanced.
【００１３】本発明の請求項３による管離脱防止装置の
特徴構成は、前記第１抜止め輪体が、周方向で複数に分
割された第１分割抜止め体と、周方向で隣合う第１分割
抜止め体の端部同士を締付け連結する締結手段とから構
成されているとともに、前記第２抜止め輪体が、周方向
で複数に分割された第２分割抜止め体と、周方向で隣合
う第２分割抜止め体の端部同士を締付け連結する締結手
段とから構成されている点にある。According to a third aspect of the present invention, there is provided a pipe detachment preventing device, wherein the first retaining ring is arranged so that the first retaining ring is circumferentially adjacent to the first divided retaining body divided into a plurality of parts. A fastening means for fastening and connecting the ends of the one-piece retaining body, wherein the second retaining ring is divided into a plurality of parts in the circumferential direction; And fastening means for tightening and connecting the ends of the adjacent second split retaining members.
【００１４】上記特徴構成によれば、抜止め輪体の第１
・第２抜止め輪体がそれぞれ複数の分割抜止め体から構
成されているから、受口管部と挿入管部とが密封状態で
嵌合接続されたのちでも、第１抜止め輪体及び第２抜止
め輪体を容易に外套固定することができる。According to the above-mentioned characteristic configuration, the first ring of the retaining ring is formed.
-Since the second retaining ring is composed of a plurality of split retaining members, the first retaining ring and the insertion tube are connected and connected in a sealed state even after the first retaining ring and the insertion tube are connected to each other. The second retaining ring can be easily fixed to the outer jacket.
【００１５】本発明の請求項４による管離脱防止装置の
特徴構成は、前記屈曲連結手段に、管軸芯方向で相対向
する第１分割抜止め体と第２分割抜止め体との係合連結
方向を管軸芯周りでの相対回動方向に規制し、かつ、係
合連結状態にある第１分割抜止め体と第２分割抜止め体
との管径方向での相対離脱移動を接当阻止する仮連係手
段が設けられている点にある。According to a fourth aspect of the present invention, there is provided a pipe detachment preventing device, wherein the bent connecting means is configured to engage a first split stopper and a second split stopper which are opposed to each other in the pipe axis direction. The connecting direction is restricted to the direction of relative rotation around the axis of the pipe, and the relative disengagement movement in the pipe diameter direction between the first split retaining body and the second split retaining body in the engaged and connected state is connected. The point is that provision is made for provisional interlocking means.
【００１６】上記特徴構成によれば、前記屈曲連結手段
に設けた仮連係手段によって、管軸芯方向で相対向する
第１分割抜止め体と第２分割抜止め体との係合連結方向
が、管軸芯を中心とする相対回動方向に規制され、か
つ、係合連結状態に回転操作した状態では、第１分割抜
止め体と第２分割抜止め体との管径方向での相対離脱移
動が接当阻止されるので、管軸芯方向で相対向する第１
分割抜止め体と第２分割抜止め体とを所期の装着姿勢又
はそれに近い姿勢に仮連係して一つの部品として取り扱
うことができ、部品点数が増加しながらも組付け作業の
容易化、能率化を図ることができる。According to the above-mentioned characteristic configuration, the temporary connecting means provided in the bent connecting means allows the engaging and connecting directions of the first divided retaining body and the second divided retaining body opposed to each other in the tube axis direction. In a state in which the first divided retaining body and the second divided retaining body are restricted in the direction of relative rotation about the pipe axis center and rotated in the engaged and connected state, the relative position of the first divided retaining body and the second divided retaining body in the radial direction of the pipe is reduced. Since the detachment movement is prevented from coming into contact, the first opposed members in the tube axis direction are opposed to each other.
The split retaining body and the second split retaining body can be temporarily linked to an intended mounting posture or a posture close to the intended mounting posture and handled as one part. The efficiency can be improved.
【００１７】本発明の請求項５による管離脱防止装置の
特徴構成は、前記仮連係手段が、第２分割抜止め体の端
部に外套する状態で第１分割抜止め体の周方向両端部に
形成された仮止め片から構成されている点にある。According to a fifth aspect of the present invention, there is provided a pipe detachment preventing device, wherein the temporary linking means covers both ends in the circumferential direction of the first split retaining body in a state of being jacketed on the end of the second split retaining body. In that they are formed from the temporary fixing pieces formed in the above.
【００１８】上記特徴構成によれば、第１分割抜止め体
の周方向両端部にのみ、前記仮連係手段を構成する仮止
め片を形成してあるが故に、該第１分割抜止め体を鋳造
で製作する場合でも、中子を使用しない鋳造方法を採用
することが可能で、製造コストの低廉化を図ることがで
きる。According to the above-mentioned characteristic structure, since the temporary fixing pieces constituting the temporary linking means are formed only at both ends in the circumferential direction of the first divided retaining body, the first divided retaining body is formed. Even in the case of manufacturing by casting, it is possible to adopt a casting method that does not use a core, and it is possible to reduce the manufacturing cost.
【００１９】[0019]
【発明の実施の形態】〔第１実施形態〕図１〜図９は、
水道管やガス管等を構成する複数の合成樹脂製の流体輸
送管Ｐのうち、隣接する一方の流体輸送管Ｐの一端部に
形成された受口管部１と、他の流体輸送管Ｐの他端部に
形成された挿入管部２とを、管軸芯Ｘ方向から密封状態
で嵌合接続する管離脱防止装置を示し、前記受口管部１
の内周面１ａに、挿入管部２の外周面２ａとの間を密封
するための円環状の弾性シール材３を保持する周溝状の
シール保持部１ｂと、挿入管部２の外周面２ａとの間に
両管部１，２の設定角度範囲θ内での相対揺動を許容す
るための環状空間Ｓを現出するテーパー面１ｃとが形成
されている。また、前記挿入管部２の外周面２ａに対し
て脱着自在に外套固定される鋳鉄製の抜止め輪体Ａの内
周面には、挿入管部２の外周面２ａに喰込み可能な抜止
め部材の一例で、縮径側に弾性変形可能なほぼＣの字状
に形成された合成樹脂製（例えば、ポリアセタール等）
又は金属製（例えば、ステンレス鋼製等）の抜止めリン
グ４を保持する周溝状の抜止め保持部５ａが形成され、
この抜止め保持部５ａの内周面には、受口管部１と挿入
管部２との管軸芯Ｘ方向での相対離脱移動に連れて抜止
めリング４を弾性復元力に抗して縮径側に弾性変形させ
るカム手段としてのテーパー状のカム面５ｂが形成され
ているとともに、前記抜止め輪体Ａの受口管部１側の先
端部には、受口管部１と挿入管部２とに引抜き方向の外
力が作用したとき、受口管部１の外周面のうち、シール
保持部１ｂの前半部分の膨出形成箇所に相当する第１隆
起部１ｄの環状傾斜面に管軸芯Ｘ方向から接当して両管
部１，２の相対離脱移動（引抜き移動）を阻止する係止
部６ａが一体形成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIGS.
Out of a plurality of synthetic resin fluid transport pipes P constituting a water pipe, a gas pipe, and the like, an inlet pipe section 1 formed at one end of one adjacent fluid transport pipe P, and another fluid transport pipe P A pipe detachment prevention device that fits and connects an insertion tube 2 formed at the other end of the tube in a sealed state from the tube axis X direction.
A circumferential groove-shaped seal holding portion 1b for holding an annular elastic sealing material 3 for sealing between an inner peripheral surface 1a of the insertion tube portion 2 and an outer peripheral surface 2a thereof, and an outer peripheral surface of the insertion tube portion 2 A tapered surface 1c that exposes an annular space S for allowing relative swing of the two pipe portions 1 and 2 within the set angle range θ is formed between the tapered surface 1c and the second tube portion 2a. The inner peripheral surface of the cast iron retaining ring A fixed to the outer peripheral surface 2a of the insertion tube portion 2 so as to be detachable and attachable to the outer peripheral surface 2a of the insertion tube portion 2 can be inserted into the outer peripheral surface 2a of the insertion tube portion 2. An example of a stopper member made of a synthetic resin (for example, polyacetal or the like) formed in a substantially C-shape that can be elastically deformed toward the reduced diameter side.
Alternatively, a circumferential groove-shaped retaining retaining portion 5a for retaining the retaining ring 4 made of metal (for example, stainless steel) is formed.
On the inner peripheral surface of the retaining retaining portion 5a, the retaining ring 4 is pressed against the elastic restoring force with the relative disengagement movement of the receiving tube portion 1 and the insertion tube portion 2 in the tube axis X direction. A tapered cam surface 5b is formed as a cam means for elastically deforming the diameter reducing side, and the receiving tube 1 is inserted into the tip of the retaining ring A on the receiving tube 1 side. When an external force in the pull-out direction is applied to the pipe portion 2, the outer circumferential surface of the receiving pipe portion 1 has an annular inclined surface of the first raised portion 1 d corresponding to a bulging portion of the first half of the seal holding portion 1 b. An engaging portion 6a is formed integrally with the tube shaft core X to prevent the relative detachment movement (pull-out movement) of the two tube portions 1 and 2 from coming in the X direction.
【００２０】前記抜止め輪体Ａは、抜止めリング４の抜
止め保持部５ａを備えた第１抜止め輪体５と、前記係止
部６ａを備えた第２抜止め輪体６とに管軸芯Ｘ方向で分
割されているとともに、前記受口管部１と挿入管部２と
の設定角度範囲（設定揺動範囲）θ内での相対揺動を許
容する状態で、第１抜止め輪体５と第２抜止め輪体６と
を屈曲自在に連結する屈曲連結手段７が設けられてい
る。The retaining ring A is divided into a first retaining ring 5 having a retaining portion 5a for retaining the retaining ring 4 and a second retaining ring 6 having the retaining portion 6a. The first extraction is performed in a state where the pipe is divided in the X direction of the pipe axis and the relative swing of the receiving pipe 1 and the insertion pipe 2 within the set angle range (set swing range) θ is allowed. A bending connection means 7 for connecting the retaining ring 5 and the second retaining ring 6 to bend freely is provided.
【００２１】前記第１抜止め輪体５は、円周方向で二分
割された半円弧状の第１分割抜止め体５Ａと、各第１分
割抜止め体５Ａの円周方向両端部に一体形成された連結
フランジ部５ｃのうち、各第１分割抜止め体５Ａの装着
方向で相対向する連結フランジ部５ｃ同士を管径方向に
沿う方向から締付け連結する第１締結手段５Ｂとから構
成され、また、前記第１締結手段５Ｂは、相対向する両
連結フランジ部５ａに貫通形成されたボルト挿通孔５ｄ
に亘って挿入されるボルト５ｅとそれのネジ軸部に螺合
されるナット５ｆとから構成されている。The first retaining ring 5 has a semicircular first divided retaining body 5A which is divided into two in the circumferential direction, and is integrally formed at both circumferential ends of each of the first divided retaining bodies 5A. And a first fastening means 5B for tightening and connecting the connecting flange portions 5c facing each other in the mounting direction of each of the first split retaining members 5A from a direction along the pipe radial direction. In addition, the first fastening means 5B is provided with a bolt insertion hole 5d penetratingly formed on both opposing connection flange portions 5a.
And a nut 5f screwed into the screw shaft of the bolt 5e.
【００２２】前記第２抜止め輪体６は、円周方向で二分
割された半円弧状の第２分割抜止め体６Ａと、各第２分
割抜止め体６Ａの円周方向両端部に一体形成された連結
フランジ部６ｃのうち、各第２分割抜止め体６Ａの装着
方向で相対向する連結フランジ部６ｃ同士を管径方向に
沿う方向から締付け連結する第２締結手段６Ｂとから構
成され、また、前記第２締結手段６Ｂは、両連結フラン
ジ部６ｃに貫通形成されたボルト挿通孔６ｄのボルト６
ｅ・ナット６ｆとから構成されているとともに、前記各
第２分割抜止め体６Ａの周方向二個所には、軽量化のた
めの矩形状の開口６ｂが貫通形成されている。The second retaining ring 6 is a semi-circular second divided retaining body 6A divided into two in the circumferential direction, and is integrally formed on both circumferential ends of each of the second divided retaining bodies 6A. And a second fastening means 6B for tightening and connecting the connecting flange portions 6c opposed to each other in the mounting direction of each of the second split retaining members 6A from the direction along the pipe diameter direction. Further, the second fastening means 6B is provided with a bolt 6 of a bolt insertion hole 6d formed through the two connecting flanges 6c.
e. nut 6f, and a rectangular opening 6b for weight reduction is formed at two places in the circumferential direction of each of the second split retaining members 6A.
【００２３】前記屈曲連結手段７は、図１及び図４に示
すように、各第１分割抜止め体５Ａの受口管部１側の端
部に、半径方向外方に突出する鍔状の第１連結フランジ
部５Ｄを一体形成するとともに、該第１連結フランジ部
５Ｄを覆う状態で外套される各第２分割抜止め体６Ａの
挿入管部２側の端部には、不同沈下や地震等に起因し
て、受口管部１と挿入管部２とが管軸芯Ｘ方向に沿って
設定伸縮範囲以上に相対離脱移動したとき、或いは、受
口管部１と挿入管部２とが設定揺動範囲以上に相対揺動
したとき、前記第１分割抜止め体５Ａの第１連結フラン
ジ部５Ｄに接当してそれ以上の相対離脱移動又は相対揺
動を阻止する鍔状の第２連結フランジ部６Ｄを半径方向
内方に向かって一体形成して構成されている。As shown in FIGS. 1 and 4, the bending connection means 7 has a flange-like projection projecting outward in the radial direction at the end of the first split retaining body 5A on the side of the receiving tube 1 side. The first connecting flange portion 5D is integrally formed, and the end on the insertion pipe portion 2 side of each of the second split retaining members 6A that is covered so as to cover the first connecting flange portion 5D is subjected to uneven settlement or earthquake. And the like, when the receiving tube portion 1 and the inserting tube portion 2 relatively separate and move along the tube axis X direction beyond the set expansion / contraction range, or when the receiving tube portion 1 and the inserting tube portion 2 When the relative swing is larger than the set swing range, the flange-shaped second abutment against the first connecting flange portion 5D of the first split stopper 5A prevents further relative disengagement movement or relative swing. The two connecting flanges 6D are integrally formed radially inward.
【００２４】前記第１分割抜止め体５Ａの第１連結フラ
ンジ部５Ｄと第２分割抜止め体６Ａの第２連結フランジ
部６Ｄとの間、及び、挿入管部２の先端部とこれに管軸
芯Ｘ方向で相対向する受口管部１の第３***部１ｆの内
面との間には、受口管部１と挿入管部２との管軸芯Ｘ方
向での一定範囲内での伸縮移動を許容し、かつ、前記受
口管部１と挿入管部２との設定揺動範囲内での相対揺動
を許容する融通が設けられている。Between the first connecting flange portion 5D of the first split retaining member 5A and the second connecting flange portion 6D of the second split retaining member 6A, and at the distal end of the insertion tube portion 2 and the tube. Between the inner surface of the third raised portion 1f of the receiving tube portion 1 opposed in the axis X direction, within a certain range in the tube axis X direction of the receiving tube portion 1 and the insertion tube portion 2. Is provided to allow the expansion and contraction of the receiving tube portion 1 and the relative swing of the receiving tube portion 1 and the insertion tube portion 2 within a set swing range.
【００２５】前記屈曲連結手段７には、管軸芯Ｘ方向で
相対向する第１分割抜止め体５Ａと第２分割抜止め体６
Ａとの係合連結方向を管軸芯Ｘ周りでの相対回動方向に
規制し、かつ、図４〜図６に示すように、一方を反転さ
せた係合開始位置から１８０度回転させた係合連結状態
においては、第１分割抜止め体５Ａと第２分割抜止め体
６Ａとの管径方向での相対離脱移動を接当阻止する仮連
係手段８が設けられている。この仮連係手段８は、図７
に示すように、第２分割抜止め体６Ａの端部に外套する
状態で第１分割抜止め体５Ａの周方向両端部に形成され
たＬ字状の仮止め片から構成されているとともに、前記
各仮止め片８の管軸芯Ｘ周りでの中心角θ１が、１５度
〜２５度、好ましくは２０度に構成されている。また、
前記第１連結フランジ部５Ｄは、両仮止め片８の端部間
に相当する配設されていて、それの管軸芯Ｘ周りでの中
心角θ２は、１６５度〜１５５度、好ましくは１６０度
に構成されている。The bending connection means 7 includes a first split stopper 5A and a second split stopper 6 which are opposed to each other in the tube axis X direction.
The direction of engagement and connection with A was regulated in the direction of relative rotation around the pipe axis X, and as shown in FIGS. 4 to 6, one was rotated 180 degrees from the engagement start position where one was inverted. In the engaged and connected state, there is provided a temporary linking means 8 for preventing relative disengagement movement of the first split retaining body 5A and the second split retaining body 6A in the pipe diameter direction. This temporary linking means 8 is provided in FIG.
As shown in the figure, the first divided retaining body 6A is formed of L-shaped temporary fixing pieces formed on both circumferential ends of the first divided retaining body 5A in a state of being sheathed on the end of the second divided retaining body 6A. The central angle θ1 of each of the temporary fixing pieces 8 around the tube axis X is set to 15 to 25 degrees, preferably 20 degrees. Also,
The first connecting flange portion 5D is disposed between the ends of the two temporary fixing pieces 8, and has a central angle θ2 around the pipe axis X of 165 to 155 degrees, preferably 160 degrees. It is configured every time.
【００２６】前記受口管部１の外周面には、シール保持
部１ｂの前半部分の膨出形成箇所に相当する第１***部
１ｄと、シール保持部１ｂの後半部分の膨出形成箇所に
相当する第２***部１ｅ、及び、挿入管部２の先端部と
管軸芯Ｘ方向で相対向する第３***部１ｆとが形成され
ているとともに、第１***部１ｄの外径Ｄ１と第２***
部１ｅの外径Ｄ２及び第３***部１ｆの外径Ｄ３とが、
Ｄ１＞Ｄ２＞Ｄ３の関係に構成されている。 〔第２実施形態〕上述の第１実施形態では、前記抜止め
輪体Ａの受口管部１側の先端部に、受口管部１と挿入管
部２とに引抜き方向の外力が作用したとき、受口管部１
の外周面のうち、シール保持部１ｂの前半部分の膨出形
成箇所に相当する第１***部１ｄの環状傾斜面に管軸芯
Ｘ方向から接当して両管部１，２の相対離脱移動（引抜
き移動）を阻止する係止部６ａを一体形成したが、図１
０に示すように、受口管部１と挿入管部２とに引抜き方
向の外力が作用したとき、抜止め輪体Ａの受口管部１側
の先端部に形成した係止部６ａを、前記受口管部１の第
３***部１ｆの環状傾斜面に管軸芯Ｘ方向から接当させ
て、両管部１，２の相対離脱移動（引抜き移動）を阻止
するように構成してもよい。尚、その他の構成は、第１
実施形態で説明した構成と同一であるから、同一の構成
箇所には、第１実施形態と同一の番号を付記してそれの
説明は省略する。On the outer peripheral surface of the receiving tube portion 1, there are a first raised portion 1d corresponding to a bulging portion of the first half of the seal holding portion 1b and a bulging portion of the second half of the seal holding portion 1b. A corresponding second raised portion 1e and a third raised portion 1f opposed to the distal end portion of the insertion tube portion 2 in the tube axis X direction are formed, and the outer diameter D1 of the first raised portion 1d and The outer diameter D2 of the second raised portion 1e and the outer diameter D3 of the third raised portion 1f are:
It is configured such that D1>D2> D3. [Second Embodiment] In the first embodiment described above, an external force in the pull-out direction acts on the receiving tube portion 1 and the insertion tube portion 2 at the distal end of the retaining ring A on the receiving tube portion 1 side. When done
Of the first raised portion 1d corresponding to the bulging portion of the first half of the seal holding portion 1b of the outer peripheral surface of the first portion 1a from the direction of the pipe axis X, and the relative disengagement of the two pipe sections 1 and 2. The locking portion 6a for preventing movement (pull-out movement) is formed integrally,
As shown in FIG. 0, when an external force in the pull-out direction acts on the receiving tube portion 1 and the inserting tube portion 2, the locking portion 6a formed at the distal end portion of the retaining ring A on the receiving tube portion 1 side is engaged. A configuration is adopted in which the pipes 1 and 2 are brought into contact with the annular inclined surface of the third raised portion 1f of the receiving pipe 1 from the direction of the pipe axis X to prevent the relative separation movement (pull-out movement) of both pipes 1 and 2. You may. Other configurations are the first
Since the configuration is the same as that described in the embodiment, the same components are denoted by the same reference numerals as in the first embodiment, and description thereof is omitted.
【００２７】〔第３実施形態〕また、図示はしないが、
前記受口管部１と挿入管部２とに引抜き方向の外力が作
用したとき、抜止め輪体Ａの受口管部１側の先端部に形
成した係止部６ａを、前記受口管部１の第２***部１ｅ
の環状傾斜面に管軸芯Ｘ方向から接当させて、両管部
１，２の相対離脱移動（引抜き移動）を阻止するように
構成してもよい。[Third Embodiment] Although not shown,
When an external force in the pull-out direction acts on the receiving tube portion 1 and the insertion tube portion 2, the locking portion 6 a formed at the front end portion of the retaining ring A on the receiving tube portion 1 side is connected to the receiving tube. 2nd raised part 1e of part 1
May be configured to abut on the annular inclined surface from the direction of the tube axis X to prevent the relative detachment movement (pull-out movement) of the two tube parts 1 and 2.
【００２８】〔その他の実施形態〕 （１） 前記第１抜止め輪体５と第２抜止め輪体６とを
屈曲自在に連結する屈曲連結手段７としては、前記受口
管部１と挿入管部２との設定角度範囲（設定揺動範囲）
θ内での相対揺動を許容する状態でスムースに屈曲追従
することのできる構造であれば、如何なる屈曲連結構造
を採用してもよい。 （２） 上述の第１実施形態では、第１抜止め輪体５及
び第２抜止め輪体６をそれぞれ周方向で二分割して構成
したが、少なくとも一方を周方向で三つ以上に分割して
構成してもよい。[Other Embodiments] (1) As the bending connecting means 7 for connecting the first retaining ring 5 and the second retaining ring 6 to bend freely, the bending pipe 7 is inserted into the receiving pipe 1. Set angle range with tube section 2 (set swing range)
Any bending connection structure may be adopted as long as the structure can smoothly follow the bending in a state where relative swing within θ is allowed. (2) In the first embodiment described above, the first retaining ring 5 and the second retaining ring 6 are each divided into two in the circumferential direction, but at least one is divided into three or more in the peripheral direction. You may comprise.
【図１】本発明の管離脱防止装置の第１実施形態を示す
要部の断面図FIG. 1 is a sectional view of a main part showing a first embodiment of a pipe detachment prevention device of the present invention.
【図２】図１のＩＩ−ＩＩ線断面図FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】第１分割抜止め体と第２分割抜止め体の分割斜
視図FIG. 3 is a divided perspective view of a first divided retaining body and a second divided retaining body.
【図４】第１分割抜止め体と第２分割抜止め体との仮連
係作業の開始時の斜視図FIG. 4 is a perspective view at the start of a temporary linking operation between the first divided retaining body and the second divided retaining body.
【図５】第１分割抜止め体と第２分割抜止め体との仮連
係作業途中の斜視図FIG. 5 is a perspective view of the first divided retaining body and the second divided retaining body during a temporary linking operation;
【図６】第１分割抜止め体と第２分割抜止め体との仮連
係作業途終了時の斜視図FIG. 6 is a perspective view of the first divided retaining body and the second divided retaining body at the end of the temporary linking operation;
【図７】要部の断面図FIG. 7 is a sectional view of a main part.
【図８】両管部が最大限に揺動したときの断面側面図FIG. 8 is a cross-sectional side view when both pipe parts swing to the maximum.
【図９】両管部が最大限に揺動したときの断面平面図FIG. 9 is a cross-sectional plan view when both pipe parts swing to the maximum.
【図１０】第２実施形態を示す要部の断面図FIG. 10 is a sectional view of a main part showing a second embodiment.
【図１１】従来の管離脱防止装置を示す半断面側面図FIG. 11 is a half sectional side view showing a conventional pipe detachment prevention device.
【図１２】図１１のＸＩＩ−ＸＩＩ線断面図FIG. 12 is a sectional view taken along line XII-XII of FIG. 11;
Ａ 抜止め輪体 Ｘ 管軸芯 １ 受口管部 １ｄ ***部（第１***部） １ｅ ***部（第２***部） １ｆ ***部（第３***部） ２ 挿入管部 ４ 抜止め部材 ５ 第１抜止め輪体 ５Ａ 第１分割抜止め体 ５Ｂ 第１締結手段 ６ 第２抜止め輪体 ６Ａ 第２分割抜止め体 ６Ｂ 第２締結手段 ６ａ 係止部 ７ 屈曲連結手段 ８ 仮連係手段（仮止め片） Reference Signs List A Axle retaining ring X Pipe axis 1 Inlet pipe section 1d Raised section (first raised section) 1e Raised section (second raised section) 1f Raised section (third raised section) 2 Insertion pipe section 4 Retaining member 5 First retaining ring 5A First split retaining body 5B First fastening means 6 Second retaining ring 6A Second split retaining body 6B Second fastening means 6a Locking portion 7 Bend connecting means 8 Temporary linking means ( Temporary fixing piece)
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3H015 EA01 3H104 JA07 JB02 JC08 JC09 KA04 KB04 KB07 KB11 LB32 LF02 LG03 LG22 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H015 EA01 3H104 JA07 JB02 JC08 JC09 KA04 KB04 KB07 KB11 LB32 LF02 LG03 LG22
Claims (5)
相対揺動自在に密封状態で挿入接続される合成樹脂製の
挿入管部とのうち、前記挿入管部の外周面に対して脱着
自在に外套固定される抜止め輪体の内周面に、挿入管部
の外周面に喰込み可能な抜止め部材が設けられていると
ともに、前記抜止め輪体には、挿入接続された両管部に
引抜力が作用したとき、受口管部の外周面側の***部に
管軸芯方向から接当して両管部の引抜き移動を阻止する
係止部が形成されている管離脱防止装置であって、 前記抜止め輪体が、抜止め部材の保持部を備えた第１抜
止め輪体と、前記係止部を備えた第２抜止め輪体とに管
軸芯方向で分割されているとともに、前記受口管部と挿
入管部との設定揺動範囲内での相対揺動を許容する状態
で、第１抜止め輪体と第２抜止め輪体とを屈曲自在に連
結する屈曲連結手段が設けられている管離脱防止装置。1. An outer peripheral surface of the insertion tube portion of a synthetic resin insertion tube portion and a synthetic resin insertion tube portion inserted and connected in a sealed state so as to be swingable relative to the synthetic resin reception tube portion. On the inner peripheral surface of the retaining ring that is detachably fixed to the outer cover, a retaining member that can bite into the outer peripheral surface of the insertion tube portion is provided, and the retaining ring has an insertion connection. When a pulling force is applied to both of the pipe portions, a locking portion is formed to contact the raised portion on the outer peripheral surface side of the receiving pipe portion from the pipe axis direction to prevent the pulling movement of both pipe portions. Wherein the retaining ring has a pipe shaft including a first retaining ring having a retaining portion for retaining the retaining member and a second retaining ring having the retaining portion. While being divided in the core direction, the first retaining ring and the first retaining ring are separated from each other in a state in which relative swinging of the receiving tube portion and the insertion tube portion within the set swing range is allowed. 2 retaining ring body and a bendable bending connecting means tube separation preventing device is provided with a connecting.
管部との管軸芯方向に沿った一定範囲内での伸縮移動を
許容する融通が設けられている請求項１記載の管離脱防
止装置。2. The flexible connection means according to claim 1, wherein the bending connection means is provided with a flexibility that allows the expansion and contraction movement within a certain range along the pipe axis direction between the receiving pipe part and the insertion pipe part. Pipe detachment prevention device.
分割された第１分割抜止め体と、周方向で隣合う第１分
割抜止め体の端部同士を締付け連結する締結手段とから
構成されているとともに、前記第２抜止め輪体が、周方
向で複数に分割された第２分割抜止め体と、周方向で隣
合う第２分割抜止め体の端部同士を締付け連結する締結
手段とから構成されている請求項１又は２記載の管離脱
防止装置。3. The fastening in which the first retaining ring is fastened to connect the first divided retaining body divided into a plurality of parts in the circumferential direction with the ends of the first divided retaining body adjacent in the circumferential direction. And the second retaining ring is configured such that the second divided retaining body divided into a plurality in the circumferential direction and the ends of the second divided retaining body adjacent in the circumferential direction are connected to each other. 3. The pipe detachment prevention device according to claim 1, further comprising fastening means for fastening and connecting.
対向する第１分割抜止め体と第２分割抜止め体との係合
連結方向を管軸芯周りでの相対回動方向に規制し、か
つ、係合連結状態にある第１分割抜止め体と第２分割抜
止め体との管径方向での相対離脱移動を接当阻止する仮
連係手段が設けられている請求項３記載の管離脱防止装
置。4. The method according to claim 1, wherein the bending connection means includes a first rotation preventing member and a second rotation preventing member which are opposed to each other in the tube axis direction. A temporary linking means for restricting the relative movement of the first and second split stoppers in the engaged and connected state in the radial direction of the pipe and preventing the relative disengagement movement in the pipe diameter direction. 4. The pipe separation prevention device according to 3.
端部に外套する状態で第１分割抜止め体の周方向両端部
に形成された仮止め片から構成されている請求項４記載
の管離脱防止装置。5. The temporary linking means is constituted by temporary fixing pieces formed on both ends in the circumferential direction of the first split retaining body so as to cover the end of the second divided retaining body. 4. The pipe detachment prevention device according to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000246874A JP4603137B2 (en) | 2000-08-16 | 2000-08-16 | Pipe separation prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000246874A JP4603137B2 (en) | 2000-08-16 | 2000-08-16 | Pipe separation prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002061783A true JP2002061783A (en) | 2002-02-28 |
| JP4603137B2 JP4603137B2 (en) | 2010-12-22 |
Family
ID=18737090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000246874A Expired - Fee Related JP4603137B2 (en) | 2000-08-16 | 2000-08-16 | Pipe separation prevention device |
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| Country | Link |
|---|---|
| JP (1) | JP4603137B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008298141A (en) * | 2007-05-30 | 2008-12-11 | Showa Corp | Hydraulic shock absorber |
| JP2008298138A (en) * | 2007-05-30 | 2008-12-11 | Showa Corp | Hydraulic shock absorber |
| JP2010236652A (en) * | 2009-03-31 | 2010-10-21 | Waterworks Technology Development Organization Co Ltd | Separation preventing pipe joint and pipe |
| JP2013217499A (en) * | 2013-06-27 | 2013-10-24 | Waterworks Technology Development Organization Co Ltd | Pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4993015U (en) * | 1972-11-30 | 1974-08-12 | ||
| JPS49135814U (en) * | 1973-03-07 | 1974-11-22 | ||
| JPS5064220U (en) * | 1973-10-16 | 1975-06-11 | ||
| JPS55181085U (en) * | 1979-06-13 | 1980-12-26 | ||
| JP2001187994A (en) * | 1999-12-28 | 2001-07-10 | Inaba Denki Sangyo Co Ltd | Cover structure for lenghty body |
-
2000
- 2000-08-16 JP JP2000246874A patent/JP4603137B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4993015U (en) * | 1972-11-30 | 1974-08-12 | ||
| JPS49135814U (en) * | 1973-03-07 | 1974-11-22 | ||
| JPS5064220U (en) * | 1973-10-16 | 1975-06-11 | ||
| JPS55181085U (en) * | 1979-06-13 | 1980-12-26 | ||
| JP2001187994A (en) * | 1999-12-28 | 2001-07-10 | Inaba Denki Sangyo Co Ltd | Cover structure for lenghty body |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008298141A (en) * | 2007-05-30 | 2008-12-11 | Showa Corp | Hydraulic shock absorber |
| JP2008298138A (en) * | 2007-05-30 | 2008-12-11 | Showa Corp | Hydraulic shock absorber |
| JP2010236652A (en) * | 2009-03-31 | 2010-10-21 | Waterworks Technology Development Organization Co Ltd | Separation preventing pipe joint and pipe |
| JP2013217499A (en) * | 2013-06-27 | 2013-10-24 | Waterworks Technology Development Organization Co Ltd | Pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4603137B2 (en) | 2010-12-22 |
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