JPH04166525A - Pipe coupling for manhole and piping laying method for manhole - Google Patents
Pipe coupling for manhole and piping laying method for manholeInfo
- Publication number
- JPH04166525A JPH04166525A JP2294910A JP29491090A JPH04166525A JP H04166525 A JPH04166525 A JP H04166525A JP 2294910 A JP2294910 A JP 2294910A JP 29491090 A JP29491090 A JP 29491090A JP H04166525 A JPH04166525 A JP H04166525A
- Authority
- JP
- Japan
- Prior art keywords
- manhole
- pipe joint
- piping
- connection part
- pipe
- 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
- 238000000034 method Methods 0.000 title abstract description 10
- 230000008878 coupling Effects 0.000 title abstract 2
- 238000010168 coupling process Methods 0.000 title abstract 2
- 238000005859 coupling reaction Methods 0.000 title abstract 2
- 238000010276 construction Methods 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Sewage (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、マンホールの壁部に貫通固定して用いる管
継手と、この管継手を用いたマンホールの配管施工法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pipe joint that is used by penetrating and fixing to the wall of a manhole, and a method of constructing manhole piping using this pipe joint.
マンホールには、マンホールに流入した汚水等が直接マ
ンホールの内底面を流下してこれを浸食することがない
ようにした構造のものがある。Some manholes have a structure that prevents sewage and the like flowing into the manhole from directly flowing down and eroding the inner bottom surface of the manhole.
第３図はこの種の従来の構造の一例であって、いわゆる
内側管構造と称されているものである。FIG. 3 shows an example of this type of conventional structure, which is called an inner tube structure.
マンホール５０の周壁部５１の上部には略丁字形をなす
管継手６０が固定されている。管継手６０においてマン
ホール５０の外側の流入管（外側の配管部品）１０に接
続すべき第一接続部６１は、予めマンホール５０の周壁
部５１に開けられた貫通孔を内から外に貫通して位置決
めされた後、この貫通孔にモルタルが詰め込まれ固定さ
れる。又、管ｍ手６０においてマンホール５０の内側に
位置する第二接続部６２はその軸心を上下方向に向けて
おり、第二接続部６２の下部にはマンホール５０の周壁
部５１の内面に沿い上下方向に取り付けられた副管（内
側の配管部品）２０が接続されている。副管２０はその
下端に９０°ベンド管２１を存し、これをマンホール５
０の底部に設けられたインバート部５２の上に位置させ
ている。このベント管２１によって、副管２０を流れ落
ちてきた汚水は水平方向に流れ方向を変えてマンホール
５０内に流れ入るようになっている。A substantially T-shaped pipe joint 60 is fixed to the upper part of the peripheral wall 51 of the manhole 50. The first connection part 61 to be connected to the inflow pipe (outside piping component) 10 outside the manhole 50 in the pipe joint 60 is made by penetrating from the inside to the outside through a through hole previously made in the peripheral wall part 51 of the manhole 50. After positioning, mortar is filled into the through hole and fixed. In addition, the second connecting portion 62 located inside the manhole 50 in the pipe arm 60 has its axis directed in the vertical direction, and a lower portion of the second connecting portion 62 is located along the inner surface of the peripheral wall portion 51 of the manhole 50. A sub pipe (inner piping component) 20 installed in the vertical direction is connected. The sub pipe 20 has a 90° bend pipe 21 at its lower end, which is connected to the manhole 5.
It is located on the invert part 52 provided at the bottom of the 0. This vent pipe 21 allows the wastewater that has flowed down the sub pipe 20 to change its flow direction horizontally and flow into the manhole 50.
上記従来のマンホールに用いられる管継手６０とこれを
用いたマンホールの配管施工法において、流入管１０を
マンホール５０に接続するためには、それ以前に管継手
６０を周壁部５１に固定完了しておかなくてはならない
。一方、管継手６０を周壁部５１に固定すると、マンホ
ール５０の内側上部が第二接続部６２の突出により狭く
なり、マンホール５０の底部にインバート部５２を製作
する作業が非常にやりづらくなる。したがって、従来は
、■初めにマンホール５０のインバート部５２を製作し
、■次に管継手６０をマンホール５０に固定し、■その
後、管継手６０の第一接続部６１に流入管１０を接続し
、第二接続部６２に副管２０を接続する、という施工手
順を採らざるを得なかった。しかしながら、実際の工事
においては種々の都合により、インバート部５２の施工
より流入管１０のマンホール５０への接続工事を先行さ
せたい場合や、両作業を並行して行いたい場合があり、
苦慮していた。In the conventional pipe joint 60 used for a manhole and the manhole piping construction method using the same, in order to connect the inflow pipe 10 to the manhole 50, the pipe joint 60 must be fixed to the surrounding wall 51 beforehand. I have to keep it. On the other hand, when the pipe joint 60 is fixed to the peripheral wall part 51, the inner upper part of the manhole 50 becomes narrow due to the protrusion of the second connecting part 62, making it extremely difficult to manufacture the invert part 52 at the bottom of the manhole 50. Therefore, conventionally, the invert part 52 of the manhole 50 is manufactured first, the pipe joint 60 is then fixed to the manhole 50, and the inflow pipe 10 is then connected to the first connection part 61 of the pipe joint 60. , the construction procedure of connecting the auxiliary pipe 20 to the second connection part 62 had to be adopted. However, in actual construction, due to various circumstances, there may be cases where it is desired to precede the construction of the invert section 52 with connection work of the inflow pipe 10 to the manhole 50, or where it is desired to perform both works in parallel.
I was worried.
この発明は、上述従来の技術の問題点に鑑みてなされた
ものであり、その目的とするところは、マンホール及び
その回りの配管工事を所望の施工手順で行い得るマンホ
ール用管継手と、マンホールの配管施工法を提供しよう
とするところにある。The present invention has been made in view of the problems of the prior art described above, and its purpose is to provide a pipe joint for a manhole and a pipe joint for a manhole that can perform piping work in and around the manhole according to a desired construction procedure. We are trying to provide piping construction methods.
この発明は、上記目的を達成するためになされたもので
、その要旨は、以下の（１）マンホール用管継手と、（
２）マンホールの配管施工法にある。This invention was made to achieve the above object, and its gist is as follows: (1) a manhole pipe joint;
2) In the manhole piping construction method.
（１）マンホールの壁部に貫通固定され、マンホールの
外側の配管部品に接続されるべき第一接続部とマンホー
ルの内側の配管部品に接続されるべき第二接続部とを有
するマンホール用管継手において、上記第二接続部が、
上記第一接続部に連なる筒部に連設され、該筒部の外径
と略等しいか、それよりも大きい内径を有する大径筒部
により構成され、この第二接続部に上記マンホールの内
側に配置される配管部品の接続端が挿入されて接合され
ることを特徴とするマンホール用管継手。(1) A pipe joint for a manhole that is fixed through the wall of the manhole and has a first connection part to be connected to the piping parts outside the manhole and a second connection part to be connected to the piping parts inside the manhole. , the second connection part is
A large diameter cylindrical part is connected to the cylindrical part connected to the first connecting part and has an inner diameter that is approximately equal to or larger than the outer diameter of the cylindrical part, and the second connecting part is connected to the inside of the manhole. A manhole pipe joint characterized in that the connecting ends of piping parts placed in the pipe are inserted and joined.
（２）上記マンホール用管継手の第二接続部をマンホー
ルの壁部に貫通させ、第二接続部の先端を上記壁一部の
内面と面一もしくはマンホールの内方へ若干突出させた
状態にしてこのマンホール用管継手をマンホールの壁部
に固定し、その後にマンホールの内側の配管部品の接続
端を第二接続部の大径筒部に挿入して接合するようにし
たことを特徴とするマンホールの配管施工法。(2) The second connection part of the manhole pipe joint is passed through the manhole wall, and the tip of the second connection part is flush with the inner surface of the part of the wall or slightly protrudes inward from the manhole. The manhole pipe joint of the lever is fixed to the wall of the manhole, and then the connecting end of the piping part inside the manhole is inserted into the large diameter cylindrical part of the second connecting part and joined. Manhole piping construction method.
マンホール用管継手の第二接続部をマンホールの壁部に
貫通固定しても、この第二接続部の大径筒部にマンホー
ルの内側の配管部品の接続端を差し込んで接続すること
ができる。Even if the second connection part of the manhole pipe joint is fixed through the manhole wall, the connection end of the piping component inside the manhole can be inserted into the large diameter cylindrical part of the second connection part and connected.
又、上記第二接続部の先端を殆どマンホールの内側に突
出させないようにしているので、マンホール用管継手を
マンホールに取り付けた後にマンホールのインバート部
を製作する際に、マンホール用管継手がその作業の邪魔
になることがない。In addition, since the tip of the second connection part is made to hardly protrude inside the manhole, when manufacturing the inverted part of the manhole after attaching the manhole pipe joint to the manhole, the manhole pipe joint can be easily used for that work. It never gets in the way.
したがって、マンホール及びその回りの配管工事におけ
る施工手順の自由度が従来よりも大きくなる。Therefore, the degree of freedom in construction procedures for manholes and piping work around them is greater than in the past.
〔実施例〕
以下、この発明の一実施例を第１図と第２図の図面に基
づき、第３図を援用して説明する。[Embodiment] Hereinafter, an embodiment of the present invention will be described based on the drawings of FIGS. 1 and 2, and with reference to FIG. 3.
第１図は、マンホール用管継手１の縦断面図である。マ
ンホール用管継手１は、図中左側が第一接続部２であり
、右側が第二接続部３となっている。FIG. 1 is a longitudinal sectional view of a manhole pipe joint 1. In the manhole pipe joint 1, the left side in the figure is the first connection part 2, and the right side is the second connection part 3.
第二接続部３は、第一接続部２に連なる筒部４に、この
筒部４の外径にほぼ等しい内径を有する大径の筒体の一
端を嵌挿し接合して大径筒部５を形成することにより構
成されている。The second connecting part 3 is formed by fitting and joining one end of a large-diameter cylindrical body having an inner diameter approximately equal to the outer diameter of this cylindrical part 4 into a cylindrical part 4 connected to the first connecting part 2. It is constructed by forming.
このように大径の筒体を嵌挿せず、筒部４の一端を拡径
することにより大径筒部５を形成して第二接続部を構成
してもよい。又、この大径筒部５の内径は筒部４の外径
より大径となされていてもよい。In this manner, the second connecting portion may be configured by forming the large diameter cylindrical portion 5 by expanding the diameter of one end of the cylindrical portion 4 without inserting a large diameter cylindrical body. Further, the inner diameter of the large diameter cylindrical portion 5 may be larger than the outer diameter of the cylindrical portion 4.
又、この大径筒部５の長さは、ここに挿入されて接合さ
れるマンホールの内側に配置される配管部品の接続部を
固定保持できる長さであればよく、マンホールの周壁部
の厚さより小さくても大きくてもかまわない。The length of this large-diameter cylindrical portion 5 is sufficient as long as it can securely hold the connecting portion of the piping component placed inside the manhole to be inserted and joined therein, and the length of the large-diameter cylindrical portion 5 may be a length that can securely hold the connecting portion of the piping component placed inside the manhole to be inserted therein and joined. It doesn't matter if it's smaller or bigger than that.
又、第一接続部２の端部近傍には密封リング用の溝６が
環状に突設されている。Further, near the end of the first connecting portion 2, a groove 6 for a sealing ring is protruded in an annular shape.
尚、この実施例では、マンホール用管継手１は硬質塩化
ビニル等の硬質プラスチックから製せられており、その
大径筒部５の外周面には、図示していないが、砂粒を一
面に付着させた所謂砂付加工が施されており、モルタル
等と接着され易いようにされている。In this embodiment, the manhole pipe joint 1 is made of hard plastic such as hard vinyl chloride, and the outer peripheral surface of the large diameter cylindrical portion 5 is coated with sand grains (not shown). It has been given a so-called sanding process to make it easier to bond with mortar and the like.
上記マンホール用管継手１は、マンホール５０に以下の
ように固定して使用される。The manhole pipe joint 1 is used by being fixed to the manhole 50 as follows.
予め、第２図に示すように、マンホール５０の周壁部５
１の上部に、上記マンホール用管継手１の第二接続部３
よりも大きな貫通孔５３をくり抜いておく。そして、こ
の貫通孔５３に、マンホール用管継手１の第二接続部３
をマンホールの外側から内側へ差し込み、第二接続部３
の先端を周壁部５１の内面５１ａより若干内側へ突出す
るように位置決めした後、この貫通孔５３にモルタル等
の接着剤５５を充填して、マンホール用管継手１をマン
ホール５０に固定する。尚、マンホール用管継手１の第
二接続部３の先端をマンホール５０の周壁部５１の内面
５１ａと面一にしてもよい。In advance, as shown in FIG.
1, the second connection part 3 of the manhole pipe joint 1
A through hole 53 larger than that is cut out. Then, the second connecting portion 3 of the manhole pipe joint 1 is inserted into this through hole 53.
from the outside of the manhole to the inside, and connect the second connection part 3.
After positioning the tip so that it projects slightly inward from the inner surface 51a of the peripheral wall portion 51, the through hole 53 is filled with an adhesive 55 such as mortar to fix the manhole pipe joint 1 to the manhole 50. Note that the tip of the second connecting portion 3 of the manhole pipe joint 1 may be flush with the inner surface 51a of the peripheral wall portion 51 of the manhole 50.
上述のように取り付ければマンホール用管継手１は殆ど
マンホール５０の内側に突出しないので、マンホール用
管継手１を取り付けた後であっても、マンホール５０の
底部にインバート部５２を設ける作業の時にマンホール
用管継手１が邪魔になることはない。勿論、従来と同様
に、インバート部５２の施工後にマンホール用管継手１
を取り付けることも可能である。If installed as described above, the manhole pipe joint 1 will hardly protrude inside the manhole 50, so even after the manhole pipe joint 1 is installed, the manhole pipe joint 1 will not protrude inside the manhole 50 when the invert part 52 is installed at the bottom of the manhole 50. The pipe fitting 1 does not get in the way. Of course, as in the past, after the invert section 52 is constructed, the manhole pipe joint 1
It is also possible to attach
次に、マンホール用管継手１をマンホール５０に取り付
けた後のマンホール５０の回りの配管施工について、第
３図を援用して説明する。Next, piping construction around the manhole 50 after the manhole pipe joint 1 is attached to the manhole 50 will be explained with reference to FIG. 3.
マンホール用管継手ｌに流入管（マンホールの外側の配
管部品）１０を接続する場合には、マンホール用管継手
１の第一接続部２の溝６に密封リング（図示せず）を装
着した後、流入管１０の先端を第一接続部２に差し込ん
で取り付ける。When connecting the inflow pipe (piping component outside the manhole) 10 to the manhole pipe fitting 1, after installing a sealing ring (not shown) in the groove 6 of the first connection part 2 of the manhole pipe fitting 1. , insert the tip of the inflow pipe 10 into the first connection part 2 and attach it.
一方、上記マンホール用管継手１に副管２０を接続する
場合には、略丁字形の管継手（マンホールの内側の配管
部品）２２の中央接続端２２ａを接着剤を介してマンホ
ール用管継手１の大径筒部５に差し込んでその先端を筒
部４に当接させ、マンホール用管継手１の大径筒部５の
内面と上記中央接続端２２ａの外面とを接着する。その
時に、他の二つの接続端２２ｂ、２２ｃを上下方向に向
くように位置させておき、下方に向かせた接続端２２ｂ
に副管２０を差し込んで接着し、副管２０をマンホール
５０の周壁部５１に沿って上下方向に配置する。そして
、副管２０の下端に９０°ベンド管２１を接合する。On the other hand, when connecting the auxiliary pipe 20 to the manhole pipe joint 1, the central connection end 22a of the approximately T-shaped pipe joint (piping component inside the manhole) 22 is connected to the manhole pipe joint 1 through an adhesive. is inserted into the large-diameter cylindrical portion 5 of the manhole pipe joint 1, and its tip is brought into contact with the cylindrical portion 4, and the inner surface of the large-diameter cylindrical portion 5 of the manhole pipe joint 1 and the outer surface of the central connecting end 22a are adhered. At that time, the other two connecting ends 22b and 22c are positioned so as to face in the vertical direction, and the connecting end 22b facing downward
The auxiliary pipe 20 is inserted and bonded to the auxiliary pipe 20, and the auxiliary pipe 20 is arranged vertically along the peripheral wall 51 of the manhole 50. Then, a 90° bend pipe 21 is joined to the lower end of the sub pipe 20.
尚、略丁字形の管継手２２の接続端２２ｂに副管２０及
び９０°ベンド管２１を接合した後、この管継手２２の
中央接続端２２ａをマンホール用管継手１の大径筒部５
に差し込んで接着するようにしてもよい。After joining the sub pipe 20 and the 90° bend pipe 21 to the connecting end 22b of the approximately T-shaped pipe joint 22, the central connecting end 22a of the pipe joint 22 is connected to the large diameter cylindrical portion 5 of the manhole pipe joint 1.
It may also be inserted into and glued.
このように、このマンホール用管継手１をマンホール５
０に対し前述の位置関係にして取り付けるようにすれば
、マンホール５０にマンホール用管継手ｌを固定した後
にインバート部５２を製作することができる。その結果
、工事の進捗状況等の実情に最も適した施工手順を採る
ことができるようになる。In this way, this manhole pipe joint 1 is connected to the manhole 5.
If it is attached in the above-mentioned positional relationship with respect to 0, the invert part 52 can be manufactured after the manhole pipe joint l is fixed to the manhole 50. As a result, it becomes possible to adopt the construction procedure most suitable for the actual situation such as the progress of the construction work.
この発明は上述の実施例に制約されず種々の態様が採用
可能である。This invention is not limited to the above-described embodiments, and various embodiments can be adopted.
〔発明の効果］
以上説明したように、この発明によれば、マンホール用
管継手とマンホールの内側の配管部品とが別体とされ、
マンホール用管継手の第二接続部の先端を殆どマンホー
ルの内側に突出させないようにマンホールの周壁に固定
されるので、マンホール用管継手がマンホール内部での
作業の邪魔になることがなく、マンホール用管継手をマ
ンホールに取り付けた後にマンホールのインバート部を
製作することができる。[Effects of the Invention] As explained above, according to the present invention, the manhole pipe joint and the piping parts inside the manhole are separated,
Since the tip of the second connection part of the manhole pipe joint is fixed to the peripheral wall of the manhole so that it hardly protrudes inside the manhole, the manhole pipe joint does not get in the way of work inside the manhole. After the pipe fitting is attached to the manhole, the invert section of the manhole can be manufactured.
したがって、マンホール及びその回りの配管工事におけ
る施工手順の自由度が従来よりも大きくなるという優れ
た効果が奏される。Therefore, an excellent effect is achieved in that the degree of freedom in the construction procedure for piping work in and around the manhole is greater than in the past.
第１図及び第２図は、この発明の一実施例を示すもので
あり、第１図はマンホール用管継手の縦断面図、第２図
はマンホールに固定した状態を示すマンホール用管継手
の縦断面図、第３図は従来のマンホールに用いられる管
継手がマンホールに固定された状態を示す縦断面図であ
る。
１−マンホール用管継手、２−第一接続部、３−第二接
続部、４−筒部、５−大径筒部、１０−・−流入管（マ
ンホール外側の配管部品）、２２−管継手（マンホール
内側の配管部品）、２２ａ−・接続端、５０−マンホー
ル、５１−周壁部、５ ］、 ａ−内面。Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a longitudinal sectional view of a manhole pipe joint, and Figure 2 being a manhole pipe joint fixed to a manhole. FIG. 3 is a longitudinal sectional view showing a state in which a pipe joint used in a conventional manhole is fixed to the manhole. 1-Pipe joint for manhole, 2-First connection part, 3-Second connection part, 4-Cylinder part, 5-Large diameter cylinder part, 10--Inflow pipe (piping parts outside the manhole), 22-Pipe Joint (piping component inside the manhole), 22a--connection end, 50-manhole, 51-peripheral wall portion, 5], a-inner surface.
Claims (2)
外側の配管部品に接続されるべき第一接続部とマンホー
ルの内側の配管部品に接続されるべき第二接続部とを有
するマンホール用管継手において、上記第二接続部が、
上記第一接続部に連なる筒部に連設され、該筒部の外径
と略等しいか、それよりも大きい内径を有する大径筒部
により構成され、この第二接続部に上記マンホールの内
側に配置される配管部品の接続端が挿入されて接合され
ることを特徴とするマンホール用管継手。(1) A pipe joint for a manhole that is fixed through the wall of the manhole and has a first connection part to be connected to the piping parts outside the manhole and a second connection part to be connected to the piping parts inside the manhole. , the second connection part is
A large diameter cylindrical part is connected to the cylindrical part connected to the first connecting part and has an inner diameter that is approximately equal to or larger than the outer diameter of the cylindrical part, and the second connecting part is connected to the inside of the manhole. A manhole pipe joint characterized in that the connecting ends of piping parts placed in the manhole are inserted and joined.
ルの壁部に貫通させ、第二接続部の先端を上記壁部の内
面と面一もしくはマンホールの内方へ若干突出させた状
態にしてこのマンホール用管継手をマンホールの壁部に
固定し、その後にマンホールの内側の配管部品の接続端
を第二接続部の大径筒部に挿入して接合するようにした
ことを特徴とするマンホールの配管施工法。(2) The second connecting part of the manhole pipe joint is passed through the manhole wall, and the tip of the second connecting part is flush with the inner surface of the wall or slightly protrudes inward from the manhole. A manhole characterized in that the manhole pipe joint is fixed to the wall of the manhole, and then the connecting end of the piping part inside the manhole is inserted into the large diameter cylindrical part of the second connecting part and joined. piping construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2294910A JP2543622B2 (en) | 1990-10-30 | 1990-10-30 | Manhole pipe fittings and manhole piping construction method. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2294910A JP2543622B2 (en) | 1990-10-30 | 1990-10-30 | Manhole pipe fittings and manhole piping construction method. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04166525A true JPH04166525A (en) | 1992-06-12 |
| JP2543622B2 JP2543622B2 (en) | 1996-10-16 |
Family
ID=17813841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2294910A Expired - Fee Related JP2543622B2 (en) | 1990-10-30 | 1990-10-30 | Manhole pipe fittings and manhole piping construction method. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543622B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010180906A (en) * | 2009-02-03 | 2010-08-19 | Seibu Polymer Corp | Jointing structure and joining method for different kind of pipe |
-
1990
- 1990-10-30 JP JP2294910A patent/JP2543622B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010180906A (en) * | 2009-02-03 | 2010-08-19 | Seibu Polymer Corp | Jointing structure and joining method for different kind of pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2543622B2 (en) | 1996-10-16 |
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