JPH0319190U

JPH0319190U -

Info

Publication number: JPH0319190U
Application number: JP11750588U
Authority: JP
Priority date: 1988-09-07
Filing date: 1988-09-07
Publication date: 1991-02-25
Anticipated expiration: 2003-09-07
Also published as: JPH0738787Y2

Description

[Brief explanation of drawings]

第１図は本考案の実施例による接続構造を採用
した巻出し管の側面図、第２図はＳ字管の一部切
欠側面図、第３図はテーパ雄ねじに螺合された非
圧縮状態のゴムパツキンの断面形状を示す拡大断
面図、第４ａ図は戻しを行う前の接続部の状態を
示す部分断面図、第４ｂ図は上記接続構造の部分
断面図、第５図は戻しを行うときの平面図、第６
図はスプリンクラー用巻出し管の配管図である。２……パツキン受面、１３……テーパ雌ねじ、
１４……ゴムパツキン、１５……パツキン本体、
１６……雌ねじ、１７……締付ナツト、１７ａ…
…締付ナツトの端面。 Fig. 1 is a side view of an unwinding pipe employing a connection structure according to an embodiment of the present invention, Fig. 2 is a partially cutaway side view of an S-shaped pipe, and Fig. 3 is an uncompressed state screwed into a tapered male thread. Fig. 4a is a partial sectional view showing the state of the connection before returning, Fig. 4b is a partial sectional view of the above connection structure, and Fig. 5 is when returning. Plan view, No. 6
The figure is a piping diagram of a sprinkler unwinding pipe. 2...Packing surface, 13...Tapered female thread,
14...Rubber packing, 15...Packing body,
16... Female thread, 17... Tightening nut, 17a...
...End face of tightening nut.

Claims

[Claims for Utility Model Registration] 1. A connection structure for return pipes when at least one of two pipes to be connected to each other is a return pipe, the end of one of the pipes expanding outward in a tapered shape. A tapered female thread is formed on the inner surface of the end of one of the pipes that continues from the bushing receiving surface, and a tapered male thread formed on the outer periphery of the end of the other pipe is screwed into the tapered female thread. Then, the ring-shaped rubber packing screwed onto the tapered male thread is tightened by rotating the tightening nut screwed onto the tapered male thread in the loosening direction, so that the ring-shaped rubber packing comes into close contact with the packing receiving surface and the end face of the tightening nut. A return pipe connection structure characterized in that the inner circumferential portion of the rubber gasket closely engages with the tapered male thread. 2. In the return pipe connection structure of claim 1, the rubber packing is in a state in which the packing main body, which has a bullet-shaped cross-sectional shape in an uncompressed state, is pressed between the tapered receiving surface and the end surface of the tightening nut and comes into surface contact with them. A connection structure for a return pipe that is compressively deformed and in which a female thread formed on the inner periphery of the packing body engages with a tapered male thread of the other pipe.