JPS6198512A - Manufacture of composite joint pipe - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は建築用複合管に関し、よシ詳しくは、合成樹脂
製の内管の周囲を繊維補強モルタル製の外管で被覆し、
さらに内外管の端面を一致させた複合継手管の製法に関
する。尚、ここに云う継手管はＬ形管１．三方管、三方
管、四方管等を対象とするものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a composite pipe for construction, and more specifically, an inner pipe made of synthetic resin is covered with an outer pipe made of fiber-reinforced mortar,
Furthermore, the present invention relates to a method for manufacturing a composite joint pipe in which the end faces of the inner and outer pipes are matched. The joint pipe referred to here is an L-shaped pipe 1. This applies to three-way pipes, three-way pipes, four-way pipes, etc.

建築物に使用する給排水管及び給排気管は、建築法施行
令によプ不燃性であることが要求されており１一般に鉄
板製スＩ々イラル管が使用されている・ところがパス、
トイレ等に使用する時は、高湿度の環境にあるため結露
を生じ易く、数年のうちに腐食を起して管に穴を生じ、
漏水等の原因になっていた。Water supply/drainage pipes and air supply/exhaust pipes used in buildings are required to be nonflammable according to the Building Law Enforcement Ordinance, and steel plate spiral pipes are generally used.
When used in toilets etc., condensation is likely to occur due to the high humidity environment, which can corrode within a few years and cause holes in the pipes.
This was causing water leaks, etc.

〔従来の技術］ このため合成樹脂管の使用も試みられたが耐火性の問題
があるので、合成樹脂管を内管とし、その周囲を繊維補
強モルタル（以下、単に七ルタルと称す）で被覆した複
合管が最近使用されるようｋなりた。[Prior art] For this reason, attempts have been made to use synthetic resin pipes, but there are problems with fire resistance, so a synthetic resin pipe is used as the inner pipe, and the periphery is covered with fiber-reinforced mortar (hereinafter simply referred to as "Shichirutar"). Composite pipes have recently come into use.

上記の複合管は、耐震性、耐食性、耐薬品性、耐衝撃性
、防音性に優れ、流体抵抗が小さく、軽量で施工が容易
である等の多くの利点を有する。The above-mentioned composite pipe has many advantages such as excellent earthquake resistance, corrosion resistance, chemical resistance, impact resistance, and sound insulation, low fluid resistance, light weight, and easy construction.

このような複合管の直管は、合成樹脂製内管の周囲にモ
ルタルを塗布または含浸した寒冷紗を巻くことによって
容品に製造できるが継手管に関しては問題がある。Although straight pipes of such composite pipes can be manufactured by wrapping cheesecloth coated with mortar or impregnated with mortar around a synthetic resin inner pipe, problems arise when it comes to joint pipes.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記の複合継手管を製造するための従来の方法を第２〜
４図について説明する。The conventional method for manufacturing the above-mentioned composite joint pipe is
Figure 4 will be explained.

第２図及び第３図に示す入れ子法は、例えばインジェク
ション成形によシ予め形成した内管１１を外管の形状、
容積に相当する密閉空間をあけて型枠１２内に保持する
。この場合、型枠１２内で内管１１を位置決めしておか
ないと、できた製品が偏肉となるので、内管１１と型枠
１２間の間隙に入れ子（スイープ）１３を挿入し、又入
れ子１３が内管１１に対して移動しないように内管１１
の外面に接着し、残った密閉空間にそルタルを充填・養
生して外管１４を形成する。ところが内管１１の外面が
曲面であるため入れ子１３の接着が困難であるほか、各
製品ごとにこれを用いることは手数がかかる。又、接着
不良に基いて入れ子１３が移動すると均一な肉厚外管１
４の製品が得られない欠点がある。In the nesting method shown in FIGS. 2 and 3, the inner tube 11, which has been formed in advance by injection molding, is
It is held in the formwork 12 with a closed space corresponding to the volume. In this case, if the inner tube 11 is not positioned within the formwork 12, the resulting product will have uneven thickness, so a nest (sweep) 13 is inserted into the gap between the inner tube 11 and the formwork 12, and The inner tube 11 is fixed so that the nest 13 does not move relative to the inner tube 11.
The outer tube 14 is formed by adhering to the outer surface of the outer tube 14 and filling and curing the remaining sealed space with solutar. However, since the outer surface of the inner tube 11 is curved, it is difficult to adhere the insert 13, and it is time-consuming to use it for each product. Also, if the insert 13 moves due to poor adhesion, the outer tube 1 with a uniform wall thickness may
There is a drawback that product No. 4 cannot be obtained.

第４図に示す差込管法では、内Ｖ！１１の継手受口１５
に差込管（ホルダ）１６を挿入し、これを型枠の上・下
型で保持した上で図示せぬ注入口より密閉空間内にモル
タルを充填・養生して外管１４を形成する方法である。In the plug-in pipe method shown in Fig. 4, the inner V! 11 joint socket 15
A method of forming the outer tube 14 by inserting an insertion tube (holder) 16 into the mold, holding it by the upper and lower molds of the mold, and then filling and curing mortar in the closed space from an injection port (not shown). It is.

この方法ではモルタル打設時にその打設圧により、モル
タルのスラリーが継手受口１５と差込管１６間に流れこ
むことがある。このように端部がモルタルで汚れた差込
管を次々に製品を作るために繰返して使用するので製品
の継手受口１５０部分の汚れはますますひどくなり、該
汚れを除去するのに多大の作業を要する。In this method, mortar slurry may flow between the joint socket 15 and the insertion pipe 16 due to the casting pressure when placing the mortar. Since the plug-in tube whose end is contaminated with mortar is used repeatedly to make products one after another, the dirt at the joint socket 150 of the product becomes even worse, and it takes a great deal of effort to remove the dirt. Requires work.

〔問題を解決するための手段〕[Means to solve the problem]

本発明は上述した従来の製法の欠点を除去するもので、
その要旨は、 合成樹脂製の内管と、それを被覆した繊維補強モルタル
製の外管とからなると共に上記内外管の夫々の開口端面
を同一平面上に形成した複合継手管の製法であって、上
記内管の開口端部を、予め製品寸法よりも軸薔方向に若
干延長して形成し、分割状型枠と内管との間に密閉空間
な有して該型枠の上下蓋間に上記内管の延長部を挾持し
た後に、該密閉空間内に繊維補強モルタルのスラリーを
充填・養生して外管を形成し、脱型後に上記内管の延長
部を切除したことを特徴とする複合継手管の製法である
。The present invention eliminates the drawbacks of the conventional manufacturing method described above.
The gist is a method for manufacturing a composite joint pipe, which is composed of an inner pipe made of synthetic resin and an outer pipe made of fiber-reinforced mortar covering the inner pipe, and in which the opening end surfaces of the inner and outer pipes are formed on the same plane. , the open end of the inner tube is formed in advance to extend slightly in the axial direction than the product dimension, and there is a sealed space between the split formwork and the inner tube, and between the upper and lower lids of the formwork. After clamping the extension of the inner tube, the sealed space is filled with a slurry of fiber-reinforced mortar and cured to form an outer tube, and after demolding, the extension of the inner tube is cut off. This is a manufacturing method for composite joint pipes.

〔実施例〕〔Example〕

以下、第１図について本発明の詳細な説明する。 The present invention will now be described in detail with reference to FIG.

プロー成形により形成された内管１を上・下型からなる
型枠２内に保持する。一般Ｋｆａ−成型で継手管の内管
を成形するとその性質上内管として利用されない不要部
分Ａ−Ｂが生ずる。不要部分Ａ−Ｂは製品の夫々の開口
端部よプも若干寸法だけ軸線方向に延出している。本発
明では上記の不要部分Ａ−Ｂを上下型の端部で夫々挾持
して型枠２内に内管１を位置決めする。不要部分Ａ−Ｂ
間の型枠２と内管ｌとの間には従来製法と同様にモルタ
ルを充填すべき密閉空間が形成されている。An inner tube 1 formed by blow molding is held in a mold frame 2 consisting of upper and lower molds. When the inner tube of a joint tube is formed by general Kfa molding, an unnecessary portion A-B is created which is not used as an inner tube due to its nature. The unnecessary portion A-B extends axially by a slight dimension beyond the respective open end of the product. In the present invention, the inner tube 1 is positioned within the mold frame 2 by holding the unnecessary portions A-B at the ends of the upper and lower molds, respectively. Unnecessary part A-B
A closed space to be filled with mortar is formed between the formwork 2 and the inner tube 1, as in the conventional manufacturing method.

密閉空間にモルタルを充填し、養生して外管３を形成す
る。この場合、不要部分Ｂの底部及びそれに相対する型
枠に小さい孔を設けておくことにより、モルタル固化速
度をあげるための熱流体（熱水蒸気、熱風）などを通過
させることができる。そルタルの固化が完了すれば脱型
し、第１図に示す切断＠４−４及び５−５に沿って不要
部分ム・Ｂを切除する。The closed space is filled with mortar and cured to form the outer tube 3. In this case, by providing small holes in the bottom of the unnecessary portion B and the formwork opposite thereto, it is possible to pass a thermal fluid (hot steam, hot air), etc. to increase the mortar solidification rate. When the solidification of the metal is completed, it is removed from the mold, and unnecessary portions M and B are cut out along the cuts @4-4 and 5-5 shown in FIG.

上記はプロー成形によって内管１を製造したが、インジ
ェクション成形によシ製造することもできる。この場合
も、内管の開口端部に軸線方ＵＫ延びた延長部を予め形
成しておき、該延長部を介して内管を型枠内に保持する
と共に脱型後に切除する− 〔発明の効果〕 本発明は上記のように構成したので、入れ子法の如くそ
ルタル外管の肉厚に不同を生じたり、入れ子を用いる煩
雑さがない、又差込管の如く不要部Ａ−ＢＯ外面に打設
時にモルタルのスラリーが付着しても該部分は切断工程
で切除するので問題を残さない。Although the inner tube 1 was manufactured by blow molding in the above example, it can also be manufactured by injection molding. In this case as well, an extension part extending in the axial direction is formed in advance at the open end of the inner tube, and the inner tube is held in the mold via the extension part and removed after demolding. [Effects] Since the present invention is constructed as described above, there is no need for variations in the wall thickness of the outer tube as in the case of the nesting method, and there is no need for the complexity of using a nest, and there is no unnecessary part A-BO outer surface as in the case of a plug-in tube. Even if mortar slurry adheres to the concrete during pouring, there will be no problem as that part will be removed during the cutting process.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の実施例を示す垂直断面図、第２図は従
来の一製法を示す垂直断面図、第３図は第２図の■−■
線についての断面図、第４図は従来の別の製法を示す垂
直断面図である。 １・・・内管、２・・・型枠、３・・・外管、Ａ−Ｂ・
・・内管の弧長部。Fig. 1 is a vertical cross-sectional view showing an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view showing a conventional manufacturing method, and Fig. 3 is a vertical cross-sectional view showing a conventional manufacturing method.
FIG. 4 is a vertical sectional view showing another conventional manufacturing method. 1...Inner tube, 2...Formwork, 3...Outer tube, A-B・
...The arc length of the inner tube.

Claims (1)

【特許請求の範囲】[Claims] １、合成樹脂製の内管と、それを被覆した繊維補強モル
タル製の外管とからなると共に上記内外管の夫々の開口
端面を同一平面上に形成した複合継手管の製法であって
、上記内管の開口端部を、予め製品寸法よりも軸線方向
に若干延長して形成し、分割状型枠と内管との間に密閉
空間を有して該型枠の上下蓋間に上記内管の延長部を挾
持した後に、該密閉空間内に繊維補強モルタルのスラリ
ーを充填・養生して外管を形成し、脱型後に上記内管の
延長部を切除したことを特徴とする複合継手管の製法。1. A method for manufacturing a composite joint pipe consisting of an inner pipe made of synthetic resin and an outer pipe made of fiber-reinforced mortar covering the inner pipe, and in which the open end surfaces of the inner and outer pipes are formed on the same plane, The open end of the inner tube is formed in advance to extend slightly in the axial direction than the product dimensions, and a sealed space is formed between the split formwork and the inner tube, and the above-mentioned inner tube is formed between the upper and lower lids of the formwork. A composite joint characterized in that after the extension of the pipe is clamped, an outer pipe is formed by filling and curing slurry of fiber-reinforced mortar in the closed space, and after demolding, the extension of the inner pipe is cut off. Tube manufacturing method.