JPH0536186U - Pipe connection structure - Google Patents
Pipe connection structureInfo
- Publication number
- JPH0536186U JPH0536186U JP8501291U JP8501291U JPH0536186U JP H0536186 U JPH0536186 U JP H0536186U JP 8501291 U JP8501291 U JP 8501291U JP 8501291 U JP8501291 U JP 8501291U JP H0536186 U JPH0536186 U JP H0536186U
- Authority
- JP
- Japan
- Prior art keywords
- joint piece
- flange
- pipe
- pipe joint
- front surface
- 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.)
- Pending
Links
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
(57)【要約】
【目的】竪管相互を接続する場合、管に芯ずれがあって
もその芯ずれのままで管の接続を良好に行い得る管の接
続部構造を提供する。
【構成】一端に接合用フランジを有する上流側管継手片
が他端において上流側管端部に固着され、一端に接合用
フランジを有する下流側管継手片が下流側管端部に固着
され、両継手片の接合用フランジが互いにクロスする長
孔を備え、両継手片の接合用フランジがパッキングを介
して長孔のクロス箇所においてボルト・ナットにより締
結され、上流側管継手片のフランジ前面の内郭が下流側
管継手片のフランジ前面の内郭よりも内側に存在し、該
下流側管継手片の内面が上端から下端に至るに従って内
径が小となるテ−パ面とされていることを特徴とする。
(57) [Abstract] [Purpose] To provide a pipe connecting portion structure capable of favorably connecting pipes when the vertical pipes are connected to each other even if the pipes are misaligned. An upstream pipe joint piece having a joining flange at one end is fixed to the upstream pipe end portion at the other end, and a downstream pipe joint piece having a joining flange at one end is fixed to the downstream pipe end portion, The joint flanges of both joint pieces are provided with long holes that cross each other, and the joint flanges of both joint pieces are fastened with bolts and nuts at the cross points of the long holes through packing, and the flange front surface of the upstream pipe joint piece The inner contour is inside the inner contour of the flange front surface of the downstream pipe joint piece, and the inner surface of the downstream pipe joint piece is a taper surface whose inner diameter decreases from the upper end to the lower end. Is characterized by.
Description
【０００１】[0001]
本考案は排水系統の竪配管の接続に使用する管の接続部構造に関するものであ る。 The present invention relates to a pipe connection structure used for connecting vertical pipes in a drainage system.
【０００２】[0002]
ビル等での排水系竪配管の施工においては、工場内で建物の数階分の竪配管を ユニット化し、支管接続用の分岐継手等を取り付けたプレハブ配管ユニットを現 場に運搬し、このユニットを建物の躯体に固定し、次いでユニット相互間の上下 の竪管を接続する、所謂、ユニット配管工法を使用することがある。 When constructing drainage vertical pipes in buildings, etc., vertical pipes for several floors of the building are unitized in the factory, and prefabricated pipe units with branch joints for connecting branch pipes are transported to the site. In some cases, a so-called unit plumbing method is used, in which the unit is fixed to the building frame, and then the vertical pipes between the units are connected.
【０００３】[0003]
しかしながら、このユニット配管工法においては、プレハブ配管ユニットを建 物の躯体（床フレ−ム）に固定する際にずれが生じてユニット相互間における上 下の竪管相互に芯ずれが生じることが往々にしてある。 However, in this unit piping method, when the prefabricated piping unit is fixed to the building frame (floor frame), a misalignment often occurs, causing misalignment between the upper and lower vertical pipes between the units. I am doing it.
【０００４】 而るに、通常の配管工法においては、建物の下層階側から上層階側に向けて竪 管を順次に配管し建物の躯体に固定しており、ある階層にまで配管固定した竪管 の上端に次ぎの竪管の下端を接続する際、その竪管がまだ建物に固定されておら ずに芯位置の調整が自在であるから、上下の竪管相互の芯合わせを容易に行い得 る。However, in the normal piping construction method, vertical pipes are sequentially piped from the lower floor side of the building to the upper floor side and fixed to the frame of the building, and the vertical pipes are fixed to a certain level. When connecting the lower end of the next vertical pipe to the upper end of the pipe, the vertical position of the vertical pipe can be adjusted without the vertical pipe being fixed to the building, so it is easy to align the upper and lower vertical pipes. To get.
【０００５】 而して、上記通常の配管工法で使用している従来の管継手においては、管相互 を芯合わせした状態で接続するように構成してあり、かかる従来の管継手では、 上記のユニット配管工法を施用する場合、建物の躯体に固定した上下ユニットの 竪管相互に芯ずれがあれば、管の接続が至難となる（ユニットと床フレ−ムとの 固定の調整が必要となる）。Thus, in the conventional pipe joint used in the above-mentioned ordinary piping construction method, the pipes are connected in a state where the pipes are aligned with each other. When applying the unit piping method, it becomes difficult to connect the pipes if the vertical pipes of the upper and lower units fixed to the building frame are misaligned (it is necessary to adjust the fixing of the unit and the floor frame). ).
【０００６】 本考案の目的は、竪管相互を接続する場合、管に芯ずれがあってもその芯ずれ のままで管の接続を良好に行い得る管の接続部構造を提供することにある。An object of the present invention is to provide a pipe connecting portion structure capable of favorably connecting pipes when the vertical pipes are connected to each other even if the pipes are misaligned. ..
【０００７】[0007]
本考案の管継手は一端に接合用フランジを有する上流側管継手片が他端におい て上流側管端部に固着され、一端に接合用フランジを有する下流側管継手片が下 流側管端部に固着され、両継手片の接合用フランジが互いにクロスする長孔を備 え、両継手片の接合用フランジがパッキングを介して長孔のクロス箇所において ボルト・ナットにより締結され、上流側管継手片のフランジ前面の内郭が下流側 管継手片のフランジ前面の内郭よりも内側に存在し、該下流側管継手片の内面が 上端から下端に至るに従って内径が小となるテ−パ面にされていることを特徴と する構成である。 In the pipe joint of the present invention, an upstream pipe joint piece having a joining flange at one end is fixed to the upstream pipe end at the other end, and a downstream pipe joint piece having a joining flange at one end is a downstream pipe end. It has a long hole that is fixed to the joint part and the joint flanges of both joint pieces cross each other.The joint flanges of both joint pieces are fastened with bolts and nuts at the cross points of the long holes through packing, and the upstream pipe The inner surface of the front surface of the flange of the joint piece is located inside the inner surface of the front surface of the flange of the pipe joint piece, and the inner diameter of the downstream pipe joint piece decreases from the upper end to the lower end. It is a structure characterized by being faced.
【０００８】[0008]
上流側管と下流側管との間に芯ずれがあれば、両管継手片にも芯ずれが生じる が、この場合でも、両継手片のフランジの長さをその芯ずれ距離よりも長くして おくことにより両フランジの長孔を必ずクロスさせ得、そのクロス箇所で両フラ ンジをボルト・ナットの締結により連結できる。また、上記芯ずれのもとでも、 下流側管継手片のフランジ前面の内郭が上流側管継手片のフランジ前面の内周部 で覆われており、下流側管継手片におけるフランジ前面での内郭角の突出を排除 でき、排水の層流をよく保持できる。 If there is misalignment between the upstream pipe and the downstream pipe, misalignment will occur in both pipe joint pieces, but even in this case, the flange length of both joint pieces should be longer than the misalignment distance. This allows the long holes of both flanges to cross each other, and both flanges can be connected by tightening bolts and nuts at the crossing points. Even under the misalignment described above, the inner surface of the flange front surface of the downstream pipe joint piece is covered by the inner peripheral portion of the flange front surface of the upstream pipe joint piece, and the flange front surface of the downstream pipe joint piece is covered. The protrusion of the inner corner angle can be eliminated and the laminar flow of drainage can be well maintained.
【０００９】[0009]
以下、図面により本考案の実施例を説明する。 図１の（イ）は本考案の実施例を示す縦断面図、図１の（ロ）は同実施例の平 面図である。 An embodiment of the present invention will be described below with reference to the drawings. 1A is a vertical sectional view showing an embodiment of the present invention, and FIG. 1B is a plan view of the embodiment.
【００１０】 図１の（イ）並びに（ロ）において、１１は上流側管である。２１は上流側管 端部に例えば、螺合により固着した上流側管継手片であり、一端にフランジ２１ １を有し、このフランジには周方向に等間隔を隔てた４箇所に縦方向長孔２１２ 並びに横方向長孔２１３を設けてある。１２は下流側管である。２２は下流側管 端部に例えば、螺合により固着した下流側管継手片であり、一端にフランジ２２ １を有し、このフランジ２２１には上記長孔２１２，２１３に直角にクロスする 横方向長孔２２２並びに縦方向長孔２２３を設けてあり、内面２２０をその内径 を上端から下端に至るに従って漸次に小としたテ−パ−面としてある。この下流 側管継手片２２のフランジ２２１前面の内郭口径は上流側管継手片２１のフラン ジ２１１前面の内郭口径よりも大としてある。３は両継手片２１，２２のフラン ジ前面間に介在させた板状パッキング、４は両フランジ２１１，２２１間を締結 するボルト・ナットである。In (a) and (b) of FIG. 1, 11 is an upstream pipe. Reference numeral 21 is an upstream pipe joint piece fixed to the end of the upstream pipe by, for example, screwing, and has a flange 211 at one end, and this flange has longitudinal lengths at four locations at equal intervals in the circumferential direction. A hole 212 and a lateral elongated hole 213 are provided. Reference numeral 12 is a downstream pipe. Reference numeral 22 denotes a downstream pipe joint piece fixed to the end of the downstream pipe by, for example, screwing, and has a flange 221 at one end, and the flange 221 crosses the elongated holes 212 and 213 at a right angle. A long hole 222 and a long hole 223 in the vertical direction are provided, and the inner surface 220 is a taper surface whose inner diameter is gradually reduced from the upper end to the lower end. The inner diameter of the front surface of the flange 221 of the downstream pipe joint piece 22 is larger than the inner diameter of the front surface of the flange 211 of the upstream pipe joint piece 21. 3 is a plate-like packing interposed between the front faces of the flanges of both joint pieces 21 and 22, and 4 is a bolt and nut for fastening the flanges 211 and 221 together.
【００１１】 上記において、上流側管１１と下流側管１２との間に芯ずれが生じる場合があ り、その芯ずれの最大距離を、上記縦方向長孔２１２，２２３の長軸方向に±Δ Ｙ、上記横方向長孔２１３，２２２の長軸方向に±ΔＸとすれば、上記縦方向長 孔２１２，２２３の長さを２ΔＹ、上記横方向長孔２１３，２２２の長さを２Δ Ｘとしておくことにより、上記芯ずれ量並びに芯ずれ方向の如何にかかわらず、 両継手片２１，２２のフランジ２１１，２２１の長孔２１２と２２２，２１３と ２２３とをクロスさせ得、このクロス箇所にボルト４を挿通し、両フランジ２１ １，２２１をボルト・ナット４により締結できる。In the above description, there is a case where a misalignment occurs between the upstream side pipe 11 and the downstream side pipe 12, and the maximum distance of the misalignment is ± in the major axis direction of the longitudinal slots 212, 223. If ΔY is ± ΔX in the major axis direction of the lateral elongated holes 213 and 222, the length of the longitudinal elongated holes 212 and 223 is 2ΔY, and the length of the lateral elongated holes 213 and 222 is 2ΔX. By doing so, the long holes 212, 222, 213, and 223 of the flanges 211 and 221 of both joint pieces 21 and 22 can be crossed regardless of the above-mentioned misalignment amount and the misalignment direction, and at this crossing point. Both the flanges 211 and 221 can be fastened with the bolts and nuts 4 by inserting the bolts 4.
【００１２】 また、下流側管継手片２２のフランジ２２１前面の内郭口径を上流側管継手片 ２１のフランジ２２１前面の内郭内径よりも式で示すΔＲに対し、２ΔＲの寸 法だけ大きくしておくことにより、 ΔＲ2＝ΔＸ2＋ΔＹ2 上記芯ずれ量並びに芯ずれ方向の如何にかかわらず、上流側管継手片２１のフラ ンジ２１１前面の内周部ａで下流側管継手片２２のフランジ２２１前面の内郭角 ｂを覆うことができ、従って、同内郭角ｂが管接続部内面に突出するのを排除で き、排水中固形物のひっかかりを防止できる。In addition, the inner diameter of the front surface of the flange 221 of the downstream pipe joint piece 22 is set to be larger than the inner diameter of the front surface of the flange 221 of the upstream pipe joint piece 21 by ΔΔR shown by the formula by 2ΔR. Therefore, ΔR 2 = ΔX 2 + ΔY 2 regardless of the above-mentioned misalignment amount and misalignment direction, the inner peripheral portion a of the front surface of the flange 211 of the upstream side pipe coupling piece 21 has the downstream side pipe coupling piece 22 of It is possible to cover the inner peripheral angle b of the front surface of the flange 221. Therefore, it is possible to prevent the inner peripheral angle b from protruding to the inner surface of the pipe connection portion, and it is possible to prevent the solid matter in drainage from being caught.
【００１３】 上記において、図２に示すように、一方の継手片のフランジ２１１の長孔２１ ２を中心方向とし、他方の継手片のフランジの長孔２２２をその中心方向長孔２ １２に直角方向にクロスする方向、即ち、周方向とすることもでき、この場合、 上記した管相互の芯ずれの最大距離を、極座標で径方向に±Δｒ、周方向に±Δ θとすれば、中心方向長孔２１２の長さを２Δｒ、周方向長孔２２２の円弧角を ２Δθとすることにより、芯ずれ量並びに芯ずれ方向の如何にかかわらず、上記 した下流側管継手片のフランジ前面の内郭角ｂが管接続部内面に突出するのを排 除して、両継手片のフランジをボルト・ナットにより締結できる。In the above description, as shown in FIG. 2, the elongated hole 222 of the flange 211 of one joint piece is set to the center direction, and the elongated hole 222 of the flange of the other joint piece is formed at right angles to the elongated hole 212 in the center direction. It is also possible to set the direction to cross the direction, that is, the circumferential direction. In this case, if the maximum distance of core misalignment between the above-mentioned pipes is ± Δr in the radial direction and ± Δθ in the circumferential direction in polar coordinates, the center By setting the length of the direction elongated hole 212 to 2Δr and the circular arc angle of the circumferential elongated hole 222 to 2Δθ, regardless of the misalignment amount and the misalignment direction, the inside of the flange front surface of the downstream side pipe joint piece described above is The flanges of both joint pieces can be fastened with bolts and nuts by eliminating the projection of the contour angle b on the inner surface of the pipe connecting portion.
【００１４】 図３の（イ）は本考案の別実施例を示す縦断面図、図３の（ロ）は同実施例の 平面図である。 この別実施例においては、上流側管継手片２１のフランジ２１１前面の内郭に 挿入式雄部２１０を突設し、そのフランジ２１１前面の外郭ｃ、即ち、挿入式雄 部２１０の根元の外径を下流側管継手片２２のフランジ２２１前面の内郭口径よ りも小とし、両継手片２１，２２のフランジ２１１，２２１に互いに直角にクロ スする長孔（２１２と２２２，２１３と２２３）を設けてある。FIG. 3A is a vertical sectional view showing another embodiment of the present invention, and FIG. 3B is a plan view of the same embodiment. In this other embodiment, an insertable male part 210 is provided so as to project from the inner surface of the front surface of the flange 211 of the upstream side pipe joint piece 21, and the outer shell c of the front surface of the flange 211, that is, the outside of the root of the insertable male part 210 The diameter is made smaller than the inner diameter of the front surface of the flange 221 of the downstream pipe joint piece 22, and the flanges 211 and 221 of both joint pieces 21 and 22 are provided with long holes (212, 222, 213, and 223). ) Is provided.
【００１５】 この別実施例においても、上流側管１１と下流側管１２との間の芯ずれの最大 距離を、ＸＹ座標で、縦方向に±ΔＹ、横方向に±ΔＸとすれば、縦方向長孔２ １３，２２２の長さを２ΔＹ、横方向長孔２１２，２２３の長さを２ΔＸとし、 下流側管継手片２２のフランジ２２１前面の内郭口径を上流側管継手片２１の挿 入式雄部２１０の根元ｃの外径よりも２ΔＲ（ΔＲは前記式による）大きくし ておくことにより、芯ずれ量並びに芯ずれ方向の如何にかかわらず、上流側管継 手片２１の挿入式雄部２１０を下流側管継手片２２内に納めて両継手片２１，２ ２のフランジ２１１，２２１の長孔２１２と２２２，２１３と２２３とをクロス 箇所にてボルト・ナット４により締結できる。図３の（イ）において、３は板状 パッキングである。Also in this other embodiment, if the maximum distance of misalignment between the upstream pipe 11 and the downstream pipe 12 is ± ΔY in the vertical direction and ± ΔX in the horizontal direction on the XY coordinates, The length of the directional elongated holes 213 and 222 is 2ΔY, the length of the lateral elongated holes 212 and 223 is 2ΔX, and the inner diameter of the front surface of the flange 221 of the downstream side pipe coupling piece 22 is set to the insertion of the upstream side pipe coupling piece 21. By inserting the upstream side pipe joint piece 21 regardless of the misalignment amount and the misalignment direction by making the outer diameter of the root c of the insertable male portion 210 larger by 2ΔR (ΔR is according to the above formula). The male portion 210 is housed in the downstream pipe joint piece 22, and the long holes 212, 222, 213, and 223 of the flanges 211 and 221 of both joint pieces 21 and 22 can be fastened with the bolts and nuts 4 at the cross points. .. In FIG. 3A, 3 is a plate-like packing.
【００１６】 上記何れの実施例においても、継手片２１，２２の管１１，１２への固着には 、上記の螺合方式のほか、パッキング締め付け方式等を使用できる。In any of the above-described embodiments, in order to fix the joint pieces 21 and 22 to the pipes 11 and 12, the above-mentioned screwing method, packing tightening method, or the like can be used.
【００１７】[0017]
本考案の管の接続部構造は上述した通りの構成であり、被接続管に芯ずれがあ っても、その芯ずれのあるままでその管をボルト・ナットによるフランジ方式で 、かつ、流下排水中の固形物のひっかかりを惹起するような管接続部内面での突 出を排除して容易に接続できる。 The structure of the connecting portion of the pipe of the present invention is as described above, and even if the pipe to be connected has a core misalignment, the pipe is flanged by bolts and nuts with the core misaligned, and the pipe flows down. It is possible to connect easily by eliminating the protrusion on the inner surface of the pipe connection portion that causes the solid matter in the drainage to be caught.
【００１８】 従って、排水系竪管をユニット配管工法によって施工する場合、建物の躯体に 固定した互いに上下のプレハブ配管ユニットの管相互に芯ずれがあっても、芯ず れを矯正するためのやっかいな調整を行うことなく竪管の接続を行うことができ る。Therefore, when the drainage vertical pipe is constructed by the unit piping method, even if the pipes of the upper and lower prefabricated pipe units fixed to the body of the building are misaligned with each other, it is difficult to correct the misalignment. Vertical pipes can be connected without making any adjustments.
【図１】図１の（イ）は本考案の実施例の縦断面図、図
１の（ロ）は同実施例の平面図である。FIG. 1A is a vertical sectional view of an embodiment of the present invention, and FIG. 1B is a plan view of the embodiment.
【図２】本考案の上記とは別の実施例の平面図である。FIG. 2 is a plan view of another embodiment of the present invention.
【図３】図３の（イ）は本考案の上記とは別の実施例の
縦断面図、図１の（ロ）は同実施例の平面図である。FIG. 3A is a vertical cross-sectional view of another embodiment of the present invention, and FIG. 1B is a plan view of the same embodiment.
１１ 上流側管 １２ 下流側管 ２１ 上流側管継手片 ２１１ フランジ ２１２ 長孔 ２１３ 長孔 ２２ 下流側管継手片 ２２１ フランジ ２２２ 長孔 ２２３ 長孔 11 upstream side pipe 12 downstream side pipe 21 upstream side pipe joint piece 211 flange 212 long hole 213 long hole 22 downstream side pipe joint piece 221 flange 222 long hole 223 long hole
Claims (1)
手片が他端において上流側管端部に固着され、一端に接
合用フランジを有する下流側管継手片が下流側管端部に
固着され、両継手片の接合用フランジが互いにクロスす
る長孔を備え、両継手片の接合用フランジがパッキング
を介して長孔のクロス箇所においてボルト・ナットによ
り締結され、上流側管継手片のフランジ前面の内郭が下
流側管継手片のフランジ前面の内郭よりも内側に存在
し、該下流側管継手片の内面が上端から下端に至るに従
って内径が小となるテ−パ面にされていることを特徴と
する管の接続部構造。1. An upstream pipe joint piece having a joining flange at one end is fixed to the upstream pipe end portion at the other end, and a downstream pipe joint piece having a joining flange at one end is fixed to the downstream pipe end portion. The joint flanges of both joint pieces have long holes that cross each other, and the joint flanges of both joint pieces are fastened with bolts and nuts at the cross points of the long holes through packing, and the flange of the upstream pipe joint piece The inner contour of the front surface is present inside the inner contour of the flange front surface of the downstream pipe joint piece, and the inner surface of the downstream pipe joint piece is a tapered surface whose inner diameter decreases from the upper end to the lower end. The structure of the connection part of the pipe characterized by being.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8501291U JPH0536186U (en) | 1991-10-18 | 1991-10-18 | Pipe connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8501291U JPH0536186U (en) | 1991-10-18 | 1991-10-18 | Pipe connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0536186U true JPH0536186U (en) | 1993-05-18 |
Family
ID=13846836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8501291U Pending JPH0536186U (en) | 1991-10-18 | 1991-10-18 | Pipe connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0536186U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08215879A (en) * | 1995-02-20 | 1996-08-27 | Kawasaki Heavy Ind Ltd | Welded structure of tube and flange connected structure of tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149481A (en) * | 1979-05-08 | 1980-11-20 | Kubota Ltd | Joint portion structure of drain pipe |
| JPH02107887A (en) * | 1988-09-26 | 1990-04-19 | Georg Fischer Ag | Flange joint |
-
1991
- 1991-10-18 JP JP8501291U patent/JPH0536186U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149481A (en) * | 1979-05-08 | 1980-11-20 | Kubota Ltd | Joint portion structure of drain pipe |
| JPH02107887A (en) * | 1988-09-26 | 1990-04-19 | Georg Fischer Ag | Flange joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08215879A (en) * | 1995-02-20 | 1996-08-27 | Kawasaki Heavy Ind Ltd | Welded structure of tube and flange connected structure of tube |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4076281A (en) | Bell fitting and support assembly for pipe | |
| US5044674A (en) | Angularly adjustable pipe connector | |
| JPH0536186U (en) | Pipe connection structure | |
| JPH04366247A (en) | Connecting part for square steel pipe column and beam, and connecting hardware therefor | |
| JP3126207B2 (en) | Unit house piping connection structure | |
| JP2571728B2 (en) | Beam-to-column connection system for steel pipe structures | |
| JPH045602Y2 (en) | ||
| JPH04344114A (en) | Floor duct joint | |
| JPS6145266Y2 (en) | ||
| JPH0648233Y2 (en) | Three-way adjustment fitting for pipe | |
| JP3466571B2 (en) | Connection structure between underground buried frame and pipe | |
| JP3078094B2 (en) | Building unit piping connection structure | |
| JPH0622410U (en) | H-shaped steel connection structure | |
| KR20240108979A (en) | Clamp | |
| JPH0643472U (en) | Vertical shaft piping unit fitting | |
| KR200261913Y1 (en) | Rounding drain pipe using a high density polyethylene | |
| JPH0626615Y2 (en) | U-shaped groove connection structure | |
| JP2000014822A (en) | Sprinkler piping structure, branch pipe for sprinkler and constructing method | |
| JPH0729064U (en) | Drainage fitting for double layer pipe | |
| JPH069133Y2 (en) | Connection structure of columns and beams | |
| JPH057362Y2 (en) | ||
| JPH0135049Y2 (en) | ||
| JPH0728247Y2 (en) | Joint structure of columns and beams | |
| JP2001280086A (en) | Joint structure for concrete structure | |
| JPH0835590A (en) | Jump type pipe coupling |