JPH01111768U

JPH01111768U -

Info

Publication number: JPH01111768U
Application number: JP172388U
Authority: JP
Priority date: 1988-01-12
Filing date: 1988-01-12
Publication date: 1989-07-27

Description

[Brief explanation of the drawing]

第１図ないし第３図は本考案の一実施例を示す
もので、第１図は全体説明図、第２図は自動開閉
弁取付部の縦断面図、第３図は第２図中―線
に沿う断面図である。第４図及び第５図は自動開
閉弁の他の実施例を示すもので、第４図は縦断面
図、第５図は第４図中―線に沿う断面図であ
る。図において、１は排水器具、２はトラツプ、３
は排水管、５は空気導入管、６は自動開閉弁であ
る。 Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being an overall explanatory view, Figure 2 being a vertical sectional view of the automatic on-off valve mounting section, and Figure 3 being the middle of Figure 2. It is a sectional view along a line. 4 and 5 show other embodiments of the automatic on-off valve, with FIG. 4 being a longitudinal sectional view and FIG. 5 being a sectional view taken along the line - in FIG. 4. In the figure, 1 is a drainage device, 2 is a trap, and 3
5 is a drain pipe, 5 is an air introduction pipe, and 6 is an automatic opening/closing valve.

Claims

[Scope of utility model registration request]

An air introduction pipe whose end is open to the atmosphere is connected to the middle of the drain pipe that leads from the drainage equipment to the main drainage pipe, and the air introduction pipe is connected to the air introduction pipe, which closes the pipe and opens due to the pressure difference with the outside world when the pressure inside the drain pipe is reduced. Drainage equipment equipped with an automatically operating valve.