【０００１】
【発明の属する技術分野】
本発明は、ガス管等の配管用孔閉塞装置に係り、詳しくは、ポリエチレン製のガス管を損傷させて孔を空けてしまった場合に、本工事までの間、その損傷箇所の孔埋めを行うための仮の孔埋め技術に関するものである。
【０００２】
【従来の技術】
埋設管の更新や入替えを行うには、先ずガス管の埋まっている箇所を掘削して掘り起こすのであるが、パワーショベルやユンボ等の掘削作業機を用いた場合に、誤ってガス管を機械で傷付けてしまうことが間々有る。このような掘削作業中の管損傷時は未だガス管全体が露出しておらず、破損部のみが露出している状態であることが多いので、破損孔周りの埋設管部分が露出するように開削して、破損孔の形状や大きさに応じて手で詰め込んだウエスや粘土等の詰め物でその破損孔を塞ぎ、必要に応じて、修理テープ等のシートを上から巻き付けるといった応急処置を講じている。
【０００３】
【発明が解決しようとする課題】
前述のように、地面の掘削中にガス管を損傷させてしまうと、損傷による孔を埋める応急処置を行っても、以後は、漏洩ガスを気にしながらの効率の悪い掘削作業になってしまうので、本工事迄の短い期間であっても、損傷孔を簡単な手段でもってより有効に閉塞できる孔閉塞装置が要望されていたのである。
【０００４】
本発明の目的は、掘削作業中等にガス管を損傷させた場合の仮の孔埋め手段を、より確実な孔の閉塞作用が得られるものとして、本工事までの間におけるガス漏れに気を使うこと無く掘削作業が行えるよう、ガス漏れ阻止機能が確実化された配管用孔閉塞装置を提供する点にある。
【０００５】
【課題を解決するための手段】
請求項１の構成は、図１、図２に例示する如く、配管用孔閉塞装置において、配管１の孔１ｓに挿入するための棒状体３と、これの先端部に装備される係止機構４と、配管１の外周面１ａに密着可能な内周面２ａを有した状態で棒状体３に略気密状態に貫通支持された閉塞具２と、この閉塞具２を棒状体３に対して係止機構側に押圧自在な押圧手段５とを備えるとともに、
係止機構４は、棒状体３と共に孔１ｓに挿入自在となる退入姿勢から、配管１内に挿入された状態において棒状体３の径方向に張出て、配管内周面１ｂに接当する作用姿勢に切換わる係止部材９を棒状体３に設けて構成されていることを特徴とする。
【０００６】
請求項１の構成によれば、先ず係止部材が退入姿勢とされた状態で棒状体を損傷孔から配管内に挿入し、それから係止部材を作用姿勢に切換えると、係止部材が配管の内周面に引っ掛かって棒状体を抜け止め状態にすることができる。そして、その抜け止め状態にて押圧手段によって閉塞具を係止機構側に、即ち、係止部材側に強制移動させて、閉塞具の内周面を配管の外周面に押圧することにより、損傷孔を閉塞することができる。
【０００７】
これによれば、閉塞具を配管外周面に密着させて損傷孔を塞ぐには、損傷孔及びその付近における配管が露出しておれば良いから、掘削中に誤ってガス管に孔を空けてしまった場合には、不十分なガス漏れ阻止状況において、損傷孔付近のガス配管を完全に露出させるべく急いで掘削するといった時間と労力を要する従来手段が不要になり、そのままの状態、或いはほんの少し廻りの土を退かす程度で、迅速に、かつ、確実に損傷孔を閉塞することができるようになる。
【０００８】
請求項２の構成は、図３、図４に例示する如く、請求項１の構成において、係止部材９は、棒状体３の長手方向に沿った退入姿勢と、棒状体３の径方向に拡がって配管内周面１ｂに接当自在となる作用姿勢とに切換え自在に棒状体３の先端部に枢支され、かつ、作用姿勢に復帰付勢される爪部材によって構成されていることを特徴とする。
【０００９】
請求項２の構成によれば、退入姿勢では爪部材は棒状体の長手方向に沿っているので、係止機構を含む棒状体全体としての損傷孔への挿入方向視における面積を比較的小さくすることができるので、小さい損傷孔から対応して閉塞処理できるようになる。そして、爪部材は作用姿勢に復帰付勢されているから、棒状体が損傷孔に挿入されて先端部が配管内に達したら、自動的に爪部材が作用姿勢に切換わるので、棒状体を損傷孔から配管内に挿入する操作だけで、棒状体が配管からの抜け止めされる係止機構の作用状態を得ることができる。
【００１０】
請求項３の構成は、図１、図８に例示する如く、請求項１又は２の構成において、閉塞具２を、配管密着用内周面２２ａ，２３ａ，２４ａが形成された閉塞部材２２，２３，２４の複数を互いに分離自在に積層して構成するとともに、各配管密着用内周面２２ａ，２３ａ，２４ａは互いに径の異なるガス管１に対応したものに形成されていることを特徴とするものである。
【００１１】
請求項３の構成によれば、閉塞部材を分離すれば、分離前のものとは異なる径の配管に対応させることができるので、１つの閉塞具でありながら、互いに径の異なる複数種の配管に用いることが可能になる。つまり、閉塞具の配管密着用内周面の径寸法が、複数の配管寸法に対応したものに設定できて、汎用性が備わった便利なものにすることができた。
【００１２】
請求項４の構成は、図１、図２に例示する如く、請求項１〜３の構成において、押圧手段５は、閉塞具２を棒状体３に螺着することで構成されるとともに、棒状体３を閉塞具２に対して回動操作するための棒状操作部材６を設けてあることを特徴とするものである。
【００１３】
請求項４の構成によれば、閉塞具と棒状体とを螺着させ、棒状体を閉塞具に対して回動操作するための操作部材を設けることで押圧手段を構成するものであり、操作部材を用いて棒状体を回動操作すれば、棒状体３と閉塞具２と、即ち、爪部材と閉塞具２とを強制的に接近移動させることができ、閉塞具を配管外周面に押圧して損傷孔を塞ぐことができる。従って、棒状操作部材を長いものにすれば、地面から離れた低い位置における配管の損傷孔を、地面上からの楽な操作によって良好に閉塞することができる便利さがある。
【００１４】
請求項５の構成は、図５、図９に例示する如く、請求項４の構成において、棒状操作部材６において、棒状体３との連結側とは反対側となる一端部分が、棒状体３の軸方向Ｙに対して傾いた方向に延設自在となるための継手手段ｔを設けてあることを特徴とするものである。
【００１５】
請求項５の構成によれば、継手手段の存在により、棒状操作部材の操作側部分（一端部分）を、棒状体とは異なる方向に向けることができるから、損傷孔の閉塞作業が行い易い位置に棒状操作部材を向けれるとか、掘削途中で横方向に幅が少ない掘削穴にて横向き損傷孔の閉塞操作を行う場合に、棒状操作部材の操作側部分は上下向き等の操作し易い向きにセットすることができるようになる。
【００１６】
尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。
【００１７】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
図１、図２に、ＰＥ製のガス管１に用いる配管用孔閉塞装置Ａが示されている。即ち、ガス管の外周面１ａに密着自在な湾曲面２ａを有した閉塞具２と、この閉塞具２を貫くように螺装された回転棒３と、回転棒３の先端に装備された係止機構４と、閉塞具２と回転棒３との相対位置を強制移動自在な締上げ機構５（押圧手段の一例）と、回転棒３の基端側に連結自在な操作棒６（棒状操作部材の一例）とから構成されている。
【００１８】
閉塞具２は、ガス管１の外周面１ａと同径の部分円筒内周面２ａを有したゴム板２Ａと、金属等の強度及び剛性を有した基板２Ｂとを貼着等によって一体化して成るものである。基板２Ｂには、回転棒３の雄ネジ部３ａを貫通螺着するための内周雌ネジ部７ａと、外周雄ネジ部７ｂとが形成されたボス部７が一体的に装備されている。ボス部７の根元側には、後述するキャップ１６との間に作用するＯリング１５が巻回装備されている。
【００１９】
回転棒３は、先端に係止機構４を装備し、かつ、基端に操作棒６の取付部８を有するとともに、取付部８に続く雄ネジ部３ａが形成されたものであり、閉塞具２のボス部７に螺装されている。この回転棒３を左右一方（例えば右方向）に回動すれば、ボス部７側からゴム板２Ａ側に向けて強制移動でき、左右他方（例えば左方向）に回動すれば、ゴム板２Ａ側からボス部７側に向けて強制移動できるようになっている。
【００２０】
係止機構４は、回転棒３の先端に軸心Ｙ回りで相対回転自在に支承された回転部材１７に、支点Ｘ周りで揺動自在に枢支された複数の爪部材（係止部材）９と、これら爪部材９を回転棒３の外径側に開き付勢するつる巻バネ等の弾性部材１０とから構成されている（図７参照）。各爪部材９の開き限界位置は、図示しないストッパー等によって予め定められており、その開き限界位置ではそれ以上開こうとする外力に強固に対抗できるように構成されている。尚、各爪部材９の先端位置が、修繕対象となるガス管１の内径と丁度等しい曲率半径の軌跡を辿るように枢支させても良い。
【００２１】
操作棒６は、先端に取付部８に嵌合する嵌合部１１を有した長尺状の棒本体１２と、この棒本体１２の基端側に折り畳み自在に枢着されたハンドル１３とから構成されている。嵌合部１１を取付部８に嵌合させた状態で、横倒しの作用姿勢とされたハンドル１３を持って操作棒６を回し操作すると、回転棒３と閉塞具２との相対位置を強制移動させることができる（図４参照）。
【００２２】
次に、ガス管１に開いた損傷孔１ｓを、配管用孔閉塞装置Ａを用いて修復する作業について説明する。先ず、図２に示すように、閉塞具２が装備された状態の回転棒３を用意し、各爪部材９を弾性部材１０に抗して折り畳んだ状態としてから、回転棒３を先端側から損傷孔１ｓに挿入する（図３参照）。ガス管１内に挿入された各爪部材９は、損傷孔１ｓを通過した途端に、弾性部材１０の弾性付勢力によって自動的に傘のように開き揺動し、損傷孔１ｓからの回転棒３の抜出しが不能になる（図４参照）。
【００２３】
次に、図４に示すように、嵌合部１１に操作棒６を挿入してから、ハンドル１３を用いて操作棒６を、即ち回転棒３を、これがガス管１から抜き出し移動する方向に回動操作し、複数の爪部材９と閉塞具２とによってガス管１を締め上げ、ゴム板２Ａを圧縮させる。ゴム板２Ａの圧縮により、ガスの漏洩が生じないように、損傷孔１ｓをガス管１の外側から確実に閉塞することが可能になる（図５参照）。
【００２４】
それから、操作棒６を回転棒３から外し、ロックナット１４を雄ネジ部３ａに装着して、締上げ機構５の機能を維持できるようにしてから、断面鉢伏形状のキャップ１６を外周雄ネジ部７ｂを用いてボス部７に螺装し、Ｏリング１５によるシール機能によってガス漏れ阻止機能を強化するのである。
【００２５】
〔別実施形態〕
《１》 図６、図７に示すように、ガス管１の管中心Ｚに対して偏心した方向に作用可能な首振型（偏心型）の孔閉塞装置Ｂでも良い。即ち、回転部材１７の両側に支点Ｘを有した横軸１８を設け、互いに開き付勢される長短一対の爪部材１９，２０を横軸１８に揺動自在に枢支して係止機構４を構成するとともに、回転部材３に球面座２１及びロックナット１４を介して装備される閉塞具２の貫通孔２ｈを、ガス管側ほど径が大きくなるテーパ孔に形成して首振型孔閉塞装置Ｂを構成してある。
【００２６】
つまり、ガス管１内に挿入されて揺動によって各爪部材１９，２０が広がると、それら爪部材１９，２０の長短により、回転部材３の引張り方向を、ガス管中心Ｚを通らない方向に偏らせて設定できるとともに、テーパ状の貫通孔２ｈ及び球面座２１による偏心機能によって、回転棒３と閉塞具２との相対傾動が可能となることにより、図６に示すように、掘削が進んで露呈されたガス管１の損傷孔１ｓが真上ではなく、横にも向いた状態で形成された場合でも、操作棒６及びハンドル１３を用いて、閉塞具２をガス管外周面１ａに押圧して損傷孔１ｓを閉塞することができるのである。
【００２７】
《２》 図８に示すように、閉塞具２を、配管密着用内周面２２ａ，２３ａ，２４ａが形成された閉塞部材の複数２２，２３，２４を互いに分離自在に積層して構成するとともに、各配管密着用内周面２２ａ，２３ａ，２４ａを互いに径の異なるガス管１に対応したものに形成した孔閉塞装置Ａでも良い。最も上側の第１閉塞部材２２の内周面２２ａはガス管径１００ｍｍに、中間の第２閉塞部材２３の内周面２３ａはガス管径１５０ｍｍに、そして、最も下側の第３閉塞部材２４の内周面２４ａはガス管径２００ｍｍに夫々対応させたものに形成されている。
【００２８】
従って、対象となるガス管１の径が２００ｍｍであれば、閉塞具２をそのまま用いるが、ガス管径が１５０ｍｍのときには第３閉塞部材２４を取外して用い、ガス管径が１００ｍｍのときには第３及び第２閉塞部材２４，２３を外して用いるようにするのである。第１閉塞部材２２は、図１に示す閉塞具２と同じ２層構造のものであるが、第２及び第３閉塞部材２３，２４は共にゴム（弾性材）のみによる単層構造である。尚、第２及び第３閉塞部材２３，２４を、共に図１に示す閉塞具２と同じ２層構造としても良い。
【００２９】
《３》 図９に示すように、操作棒６を、回転棒３に連結自在な長さの短い下部棒６ａと、ハンドル１３を備えた長さの長い上部棒６ｂと、これら両者６ａ，６ｂを連結一体化する自在継手２５とから構成しても良い。このように、腰折れ自在な操作棒６とすれば、損傷孔１ｓが横に向いた状態でも、上部棒６ｂはそれまでに掘削された孔内に配置することができ、ハンドル１３を用いて楽に操作することができる。
【００３０】
尚、一直線状の操作棒６と回転棒３とを、自在継手２５、円筒状ゴムやワイヤーケーブルといった可撓性を有した回転連結部材を介しても良く、これらを総称して「継手手段ｔ」と呼ぶものとする。
【００３１】
《４》 図１０に示すように、回転棒３の下端において、径方向に突出付勢された状態で回転棒３に内装された一対のピン部材２６，２６を備えて係止機構４とするとか、図１１に示すように、回転棒３の軸心Ｙに沿う軸心ｑ回りに揺動自在な湾曲片２７の３個を、回転棒３の下端部に装備して成る係止機構４でも良い。図１０に示すものでは、突出したピン２６によって、そして、図１１に示すものでは、横に開き移動した湾曲片２７（仮想線で示す位置）によって夫々係止機能を発揮するものである。
【００３２】
【発明の効果】
以上説明したように、本発明によれば、配管に生じた孔に挿入するための棒状体と、これの先端部に装備される係止機構と、配管の外周面に密着可能な内周面を有した状態で棒状体に略気密状態に貫通支承された閉塞具と、この閉塞具を棒状体に対して係止機構側に押圧自在な押圧手段とを備えるとともに、係止機構を、棒状体と共に孔に挿入自在となる退入姿勢から、配管内に挿入された状態において棒状体の径方向に張出て、配管内周面に接当する作用姿勢に切換わる係止部材を棒状体に設けて構成することで配管用孔閉塞装置とするものである。
【００３３】
従って、本発明による配管用孔閉塞装置を用いれば、掘削中に誤ってガス管に孔を空けてしまった場合には、不十分なガス漏れ阻止状況において、損傷孔付近のガス配管を完全に露出させるべく急いで掘削するといった時間と労力を要する従来手段が不要であり、そのままの状態、或いはほんの少し廻りの土を退かす程度で、迅速に、かつ、確実に損傷孔を閉塞することができるようになり、簡単で便利に、しかも迅速に配管の損傷孔を閉塞できるものが得られた。
【図面の簡単な説明】
【図１】孔閉塞装置の構造を示す断面図
【図２】孔閉塞装置の操作構造を示す側面図
【図３】回転棒をガス管の損傷孔に挿入しようとする状況を示す作用図
【図４】孔閉塞装置による損傷孔部分を締め上げ操作する状況を示す作用図
【図５】ガス管損傷孔部分の締め上げ操作が完了した状態示す断面図
【図６】第１別構造の孔閉塞装置を示す断面図
【図７】図６に示す孔閉塞装置の先端部分の構造を示す斜視図
【図８】別構造の閉塞具を示す断面図
【図９】継手手段を備えた操作棒の構造を示す側面図
【図１０】第２別構造の孔閉塞装置を示す断面図
【図１１】第３別構造の孔閉塞装置の原理を示す概略図
【符号の説明】
１ 配管
１ａ 外周面
１ｂ 内周面
１ｓ 損傷孔
２ 閉塞具
２ａ 内周面
３ 棒状体
４ 係止機構
５ 押圧手段
６ 棒状操作部材
９ 係止部材、爪部材
２２〜２４ 閉塞部材
２２ａ〜２４ａ 内周面
ｔ 継手手段[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pipe hole closing device for a gas pipe or the like, and more specifically, in a case where a polyethylene gas pipe is damaged and a hole is opened, filling of the damaged portion until the main construction is completed. The present invention relates to a temporary filling technique to be performed.
[0002]
[Prior art]
In order to renew or replace a buried pipe, first excavate and dig the place where the gas pipe is buried, but when using a drilling machine such as a power shovel or yumbo, the gas pipe is mistakenly machined. Sometimes it can hurt you. At the time of such pipe damage during excavation work, the entire gas pipe is not yet exposed, and only the damaged part is often exposed, so that the buried pipe part around the damaged hole is exposed. Excavate and cover the damaged hole with a stuffer such as rag or clay that is manually stuffed according to the shape and size of the damaged hole, and take emergency measures such as wrapping a sheet of repair tape etc. from above if necessary. ing.
[0003]
[Problems to be solved by the invention]
As described above, if the gas pipe is damaged during the excavation of the ground, even if an emergency measure to fill the hole due to the damage is performed, the excavation work will be inefficient while taking care of the leaked gas thereafter. Therefore, there has been a demand for a hole closing device capable of closing the damaged hole more effectively by simple means even in a short period of time until this work.
[0004]
An object of the present invention is to use a temporary hole filling means in a case where a gas pipe is damaged during an excavation operation or the like so that a more reliable hole closing action can be obtained, and pay attention to gas leakage until the main construction. An object of the present invention is to provide a pipe hole closing device in which a gas leak prevention function is ensured so that excavation work can be performed without any trouble.
[0005]
[Means for Solving the Problems]
As shown in FIGS. 1 and 2, the configuration of claim 1 is a rod-shaped body 3 for inserting into a hole 1 s of a pipe 1 and a locking mechanism provided at a distal end of the rod-shaped body 3 in a pipe hole closing device. 4, an obturator 2 having an inner peripheral surface 2a capable of closely adhering to the outer peripheral surface 1a of the pipe 1, and being penetrated and supported by the rod 3 in a substantially airtight state; A pressing mechanism 5 that can be pressed on the locking mechanism side;
The locking mechanism 4 protrudes in the radial direction of the rod-shaped body 3 when inserted into the pipe 1 from a retracted position in which the locking mechanism 4 can be inserted into the hole 1s together with the rod-shaped body 3 and contacts the pipe inner peripheral surface 1b. It is characterized in that the rod member 3 is provided with a locking member 9 that switches to an operating posture of the rod 3.
[0006]
According to the configuration of the first aspect, first, the rod is inserted into the pipe through the damaged hole in a state where the locking member is in the retracted position, and then the locking member is switched to the operating position. The rod-shaped body can be prevented from coming off by being hooked on the inner peripheral surface of the body. Then, the closing device is forcibly moved to the locking mechanism side, that is, to the locking member side by the pressing means in the retaining state, and the inner peripheral surface of the closing device is pressed against the outer peripheral surface of the pipe, thereby causing damage. The hole can be closed.
[0007]
According to this, in order to close the damaged hole by bringing the obturator into close contact with the outer peripheral surface of the pipe, it is sufficient that the damaged hole and the pipe in the vicinity thereof are exposed. In the event of insufficient gas leakage, conventional means that requires time and effort such as excavation in a hurry to completely expose the gas pipe near the damaged hole in an insufficient gas leakage prevention situation is no longer necessary, and it can be used as it is, It is possible to quickly and reliably close the damaged hole by retreating the surrounding soil a little.
[0008]
As shown in FIG. 3 and FIG. 4, the locking member 9 is configured such that the locking member 9 is in a retracted posture along the longitudinal direction of the rod 3 and in a radial direction of the rod 3. Is formed by a claw member which is pivotally supported by the distal end of the rod-shaped body 3 so as to be freely switchable to an operating position in which the operating position can be freely brought into contact with the inner peripheral surface 1b of the pipe, and is urged to return to the operating position. It is characterized by.
[0009]
According to the configuration of claim 2, since the claw member is along the longitudinal direction of the rod in the retracted posture, the area of the rod including the locking mechanism as a whole in the insertion direction into the damaged hole is relatively small. Therefore, the closing process can be performed from the small damaged hole. Then, since the claw member is urged to return to the working posture, when the rod is inserted into the damage hole and the tip end reaches the inside of the pipe, the claw member is automatically switched to the working posture. The operation state of the locking mechanism for preventing the rod-shaped body from falling out of the pipe can be obtained only by the operation of inserting the rod into the pipe from the damaged hole.
[0010]
As shown in FIG. 1 and FIG. 8, in the configuration of claim 3, in the configuration of claim 1 or 2, the closing member 2 is replaced with the closing member 22, on which the inner peripheral surfaces 22 a, 23 a, and 24 a for pipe contact are formed. A plurality of the pipes 23 and 24 are laminated so as to be separable from each other, and the inner peripheral surfaces 22a, 23a and 24a for pipe contact are formed so as to correspond to the gas pipes 1 having different diameters. Is what you do.
[0011]
According to the configuration of the third aspect, if the closing member is separated, it is possible to correspond to a pipe having a different diameter from that before separation. It can be used for That is, the diameter of the inner peripheral surface for pipe contact of the obturator can be set to a value corresponding to a plurality of pipe dimensions, and it is possible to provide a versatile and convenient one.
[0012]
As shown in FIGS. 1 and 2, the pressing means 5 is configured by screwing the obturator 2 onto the rod 3, as shown in FIGS. 1 and 2. A rod-shaped operation member 6 for rotating the body 3 with respect to the obturator 2 is provided.
[0013]
According to the configuration of claim 4, the pressing means is configured by screwing the obturator and the rod-shaped body and providing an operating member for rotating the rod-shaped body with respect to the obturator. When the rod is rotated using the member, the rod 3 and the closing member 2, that is, the claw member and the closing member 2 can be forcibly moved closer to each other, and the closing member is pressed against the outer peripheral surface of the pipe. To close the damaged hole. Therefore, if the rod-shaped operation member is made long, there is a convenience that the damaged hole of the pipe at a low position away from the ground can be satisfactorily closed by an easy operation from the ground.
[0014]
As illustrated in FIGS. 5 and 9, the end of the rod-shaped operation member 6 opposite to the side connected to the rod 3 is the rod-shaped member 3. A joint means t for extending freely in a direction inclined with respect to the axial direction Y.
[0015]
According to the configuration of the fifth aspect, the operation side portion (one end portion) of the rod-shaped operation member can be oriented in a direction different from that of the rod-shaped body due to the presence of the coupling means, so that the position where the work of closing the damaged hole is easily performed can be performed. When the rod-shaped operation member can be turned to the side, or when performing the closing operation of the laterally damaged hole in the excavation hole with a small width in the horizontal direction during excavation, the operation side part of the rod-shaped operation member It can be set.
[0016]
Note that, as described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a pipe hole closing device A used for a gas pipe 1 made of PE. That is, an obturator 2 having a curved surface 2a that can be in close contact with the outer peripheral surface 1a of the gas pipe, a rotary rod 3 screwed through the obturator 2, and a member mounted on the tip of the rotary rod 3 A stopping mechanism 4, a tightening mechanism 5 (an example of a pressing means) capable of forcibly moving the relative positions of the closing member 2 and the rotating rod 3, and an operating rod 6 (a rod-like operation) which can be connected to the base end of the rotating rod 3. An example of a member).
[0018]
The obturator 2 is formed by bonding a rubber plate 2A having a partial cylindrical inner peripheral surface 2a having the same diameter as the outer peripheral surface 1a of the gas pipe 1 and a substrate 2B having strength and rigidity such as metal by bonding or the like. It consists of The board 2B is integrally provided with a boss portion 7 having an inner peripheral female screw portion 7a and an outer peripheral male screw portion 7b for threading the male screw portion 3a of the rotating rod 3 therethrough. An O-ring 15 that acts between the boss 7 and a cap 16 described later is wound around the root of the boss 7.
[0019]
The rotating rod 3 is provided with a locking mechanism 4 at the distal end, and has a mounting portion 8 for the operating rod 6 at the base end, and is formed with a male screw portion 3a following the mounting portion 8. The second boss 7 is screwed. If the rotary rod 3 is rotated left and right (for example, rightward), it can be forcibly moved from the boss portion 7 side to the rubber plate 2A side, and if it is rotated left and right (for example, leftward), the rubber plate 2A From the side toward the boss 7 side.
[0020]
The locking mechanism 4 includes a plurality of claw members (locking members) pivotally supported on a rotating member 17 rotatably supported on a tip of the rotating rod 3 so as to be relatively rotatable about an axis Y around a fulcrum X. 9 and an elastic member 10 such as a helical spring that opens and urges the claw members 9 to the outer diameter side of the rotating rod 3 (see FIG. 7). An opening limit position of each claw member 9 is predetermined by a stopper or the like (not shown), and the opening limit position is configured so as to be able to firmly oppose an external force to open further. It should be noted that the claw members 9 may be pivotally supported such that the distal end position follows a locus having a radius of curvature exactly equal to the inner diameter of the gas pipe 1 to be repaired.
[0021]
The operating rod 6 is composed of an elongated rod body 12 having a fitting portion 11 fitted to the mounting portion 8 at the distal end, and a handle 13 pivotally attached to the base end of the rod body 12 so as to be freely foldable. It is configured. When the operating rod 6 is rotated and operated with the handle 13 in the sideways acting posture in a state where the fitting part 11 is fitted to the mounting part 8, the relative position between the rotating rod 3 and the obturator 2 is forcibly moved. (See FIG. 4).
[0022]
Next, an operation of repairing the damaged hole 1s opened in the gas pipe 1 using the piping hole closing device A will be described. First, as shown in FIG. 2, a rotating rod 3 equipped with the obturator 2 is prepared, and each claw member 9 is folded against the elastic member 10, and then the rotating rod 3 is moved from the distal end side. It is inserted into the damaged hole 1s (see FIG. 3). As soon as each claw member 9 inserted into the gas pipe 1 passes through the damaged hole 1s, the claw member 9 automatically opens and swings like an umbrella by the elastic biasing force of the elastic member 10, and rotates from the damaged hole 1s. Withdrawal of the rod 3 becomes impossible (see FIG. 4).
[0023]
Next, as shown in FIG. 4, after inserting the operating rod 6 into the fitting portion 11, the operating rod 6, that is, the rotating rod 3 is pulled out from the gas pipe 1 using the handle 13 in a direction in which the operating rod 6 is moved. By rotating, the gas pipe 1 is tightened by the plurality of claw members 9 and the obturator 2, and the rubber plate 2A is compressed. The compression of the rubber plate 2A makes it possible to reliably close the damaged hole 1s from the outside of the gas pipe 1 so as to prevent gas leakage (see FIG. 5).
[0024]
Then, the operating rod 6 is removed from the rotating rod 3, and the lock nut 14 is attached to the male screw 3a so that the function of the tightening mechanism 5 can be maintained. The O-ring 15 seals the gas leakage preventing function by screwing the boss part 7 using the 7b.
[0025]
[Another embodiment]
<< 1 >> As shown in FIGS. 6 and 7, a swinging type (eccentric type) hole closing device B which can act in a direction eccentric to the pipe center Z of the gas pipe 1 may be used. That is, a horizontal shaft 18 having a fulcrum X is provided on both sides of the rotating member 17, and a pair of long and short claw members 19 and 20 which are opened and biased to each other are pivotally supported on the horizontal shaft 18 so as to be swingable. And the through hole 2h of the closing member 2 provided on the rotating member 3 via the spherical seat 21 and the lock nut 14 is formed as a tapered hole whose diameter becomes larger toward the gas pipe side. Device B is configured.
[0026]
In other words, when the claw members 19 and 20 are spread by being inserted into the gas pipe 1 and swinging, the length of the claw members 19 and 20 causes the rotating member 3 to be pulled in a direction that does not pass through the center Z of the gas pipe. As shown in FIG. 6, excavation can be performed by allowing the rotary rod 3 and the obturator 2 to be relatively tilted by the eccentric function of the tapered through hole 2 h and the spherical seat 21, as well as being able to be set to be deviated. Even if the damaged hole 1s of the gas pipe 1 exposed in the above is formed not in a position right above but in a sideways direction, the closing member 2 is attached to the gas pipe outer peripheral surface 1a using the operation rod 6 and the handle 13. By pressing, the damaged hole 1s can be closed.
[0027]
<< 2 >> As shown in FIG. 8, the obturator 2 is formed by stacking a plurality of obturator members 22, 23, 24 on which the inner peripheral surfaces 22a, 23a, 24a for pipe contact are formed so as to be separable from each other. Alternatively, a hole closing device A in which the inner peripheral surfaces 22a, 23a, 24a for contacting the pipes are formed so as to correspond to the gas pipes 1 having different diameters. The inner peripheral surface 22a of the uppermost first closing member 22 has a gas pipe diameter of 100 mm, the inner peripheral surface 23a of the intermediate second closing member 23 has a gas pipe diameter of 150 mm, and the lowermost third closing member 24. Are formed so as to correspond to a gas pipe diameter of 200 mm.
[0028]
Therefore, when the diameter of the target gas pipe 1 is 200 mm, the obturator 2 is used as it is, but when the gas pipe diameter is 150 mm, the third closing member 24 is removed and used, and when the gas pipe diameter is 100 mm, the third obturator is used. In addition, the second closing members 24 and 23 are removed and used. The first closing member 22 has the same two-layer structure as the closing member 2 shown in FIG. 1, but both the second and third closing members 23 and 24 have a single-layer structure made of only rubber (elastic material). The second and third closing members 23 and 24 may have the same two-layer structure as the closing device 2 shown in FIG.
[0029]
<< 3 >> As shown in FIG. 9, the operating rod 6 can be connected to the rotating rod 3 by a short lower rod 6a, a long upper rod 6b provided with a handle 13, and both of them 6a, 6b. And a universal joint 25 for connecting and integrating the two. In this manner, if the operation rod 6 is capable of being bent freely, the upper rod 6b can be arranged in the hole that has been excavated so far even when the damaged hole 1s is oriented sideways, and the handle 13 can be easily used. Can be operated.
[0030]
The linear operation rod 6 and the rotary rod 3 may be connected via a flexible joint 25 such as a universal joint 25 or a cylindrical rubber or a wire cable. ".
[0031]
<< 4 >> As shown in FIG. 10, the lower end of the rotating rod 3 is provided with a pair of pin members 26, 26 housed in the rotating rod 3 in a state of being protruded and urged in the radial direction to form a locking mechanism 4. Or, as shown in FIG. 11, a locking mechanism 4 which is provided at the lower end of the rotating rod 3 with three curved pieces 27 swingable about an axis q along the axis Y of the rotating rod 3. But it's fine. In the example shown in FIG. 10, the locking function is exerted by the protruding pin 26, and in the example shown in FIG. 11, by the curved piece 27 (the position shown by the phantom line) that has moved sideways and moved.
[0032]
【The invention's effect】
As described above, according to the present invention, a rod-shaped body for insertion into a hole formed in a pipe, a locking mechanism provided at a distal end of the rod-shaped body, and an inner peripheral surface that can be in close contact with an outer peripheral surface of the pipe A closing member which is penetrated and supported in a substantially air-tight state by the rod-shaped body in a state having, and a pressing means which can press the closing member toward the locking mechanism side with respect to the rod-shaped body. The rod-shaped body is a locking member that extends from the retracted position in which it can be freely inserted into the hole together with the body and extends in the radial direction of the rod when inserted into the pipe, and switches to an operation position in which it comes into contact with the inner peripheral surface of the pipe. And a configuration for providing a pipe hole closing device.
[0033]
Therefore, when the pipe hole closing device according to the present invention is used, if a hole is accidentally made in the gas pipe during excavation, the gas pipe near the damaged hole is completely removed in an insufficient gas leakage prevention situation. Conventional means requiring time and effort such as excavation in a hurry to expose is unnecessary, and it is possible to close the damaged hole quickly and securely as it is or just to repel a little bit of soil. Thus, a device that can easily, conveniently and quickly close a damaged hole in a pipe has been obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the structure of a hole closing device. FIG. 2 is a side view showing the operation structure of the hole closing device. FIG. 3 is an operation diagram showing a situation where a rotary rod is about to be inserted into a damaged hole of a gas pipe. FIG. 4 is an operation diagram showing a situation in which a damaged hole portion is tightened by a hole closing device. FIG. 5 is a cross-sectional view showing a state in which a gas pipe damaged hole portion has been tightened. FIG. FIG. 7 is a perspective view showing the structure of the distal end portion of the hole closing device shown in FIG. 6; FIG. 8 is a cross-sectional view showing a closing device having a different structure; FIG. 9 is an operating rod provided with coupling means. FIG. 10 is a cross-sectional view showing a hole closing device having a second alternative structure. FIG. 11 is a schematic view showing the principle of a hole closing device having a third alternative structure.
DESCRIPTION OF SYMBOLS 1 Piping 1a Outer peripheral surface 1b Inner peripheral surface 1s Damage hole 2 Closure tool 2a Inner peripheral surface 3 Rod 4 Locking mechanism 5 Pressing means 6 Bar-shaped operating member 9 Locking member, claw members 22 to 24 Closing members 22a to 24a Surface t Joint means
