JP2554564Y2 - Waterproof fitting for extension vent pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a waterproof joint for a vertical ventilation pipe buried in a roof slab of a building.

(Prior art) A waterproof joint for a culvert ventilation pipe communicates with the outside from a roof slab of a building to circulate air into a drain pipe to ventilate the drain pipe system, and is buried in the roof slab. Is connected to an extended vent pipe extending from the top of the drain stack.

The waterproof joint for the extension vent pipe is buried in the roof slab at the same time as the building is constructed, and the extension vent pipe is connected to the lower end thereof and is piped.

(Problems to be solved by the present invention) However, since the above-mentioned waterproof joint for a vertical vent pipe is connected to the vertical vent pipe while being buried in a roof slab at the time of building, the waterproof joint for a vertical vent pipe is previously provided. The so-called pre-construction, which is to be buried in the roof slab, cannot be performed, and there is a problem that piping is troublesome.

In addition, the waterproof joint for the extension vent pipe may be broken due to expansion and contraction of the extension vent pipe, and it is difficult to adjust the displacement of the extension vent pipe that is fixed in advance. However, there is a problem that it takes considerable time and effort.

The present invention has been made in view of these problems,
Its purpose is to enable so-called pre-installation, in which the waterproof joint for the top ventilation pipe is buried in the roof slab in advance, as well as misalignment with the top ventilation pipe and dimensional errors due to expansion and expansion and contraction of the top ventilation pipe. It is an object of the present invention to provide a waterproof joint for a top ventilation pipe that can absorb and connect the watertight joint.

(Means for Achieving the Object) The configuration of the present invention for achieving the above object is as follows.
A vent pipe provided to protrude above the roof surface, and a waterproof joint for a top vent pipe connecting the top vent pipe, which is buried when the roof slab is formed, and has an upper insertion port through which the vent pipe can be freely inserted and removed. A main pipe having an annular projection at a lower part thereof, and a detachably screwed screw between a lower insertion port of the main pipe and an upper end of the top-vented ventilation pipe. There is provided a waterproof joint for a top ventilation pipe characterized by comprising a bellows-shaped flexible pipe capable of absorbing a dimensional error of an arrangement position with the top ventilation pipe.

(Operation) According to the above configuration, a bellows-shaped flexible pipe removably screwed into the lower insertion port of the main pipe is used to pre-install the waterproof joint for the extended ventilation pipe in the roof slab in advance. It is possible to adjust the displacement between the main pipe and the extension vent pipe that was previously installed, and also absorb the expansion and expansion and contraction of the extension vent pipe, so that the waterproof joint for the extension vent pipe can be manufactured in a short time and Piping can be done easily.

(Embodiment) An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of the waterproof joint for a vertical ventilation pipe of the present invention (hereinafter simply referred to as a waterproof joint) embedded in a roof slab.

The waterproof joint A has a main pipe 1, a ventilation pipe 2 which is removably inserted into an upper insertion port 1 a of the main pipe 1, and a bellows shape which is removably screwed into a lower insertion port 1 b of the main pipe 1. And the flexible tube 3.

The main pipe 1 is buried when the roof slab m is formed, and an annular projection on the lower outer periphery for stopping water when concrete is poured.
1c is formed.

The ventilation pipe 2 is inserted into the upper insertion port 1a so as to be freely inserted and removed, and is fixed by a set screw n provided on a flange 1d at the upper end.

The vent pipe 2 is a conventionally well-known one having a head cap 2a at an upper end, and can be easily removed by removing the set screw n.

A thread 1e is engraved on the inner periphery of the lower portion of the main pipe 1, and a thread 3a of the flexible tube 3 is screwed to the thread 1e.

The flexible tube 3 is formed in a bellows shape with a synthetic resin, and is connected to the upper end portion of the extended vent tube 5 via the valve socket 4 at the lower end.

The connection between the extension pipe 5 and the flexible pipe 3 can be made even when the main pipe 1 buried in advance when the roof slab m is formed and the extension pipe 5 fixed in advance are displaced. The flexible tube 3 can be connected while absorbing and adjusting the dimensional error due to the displacement.

FIG. 7 shows a state in which the waterproof cover c is provided. In this state, the waterproof cover c can be attached to the roof slab m.

(Effects of the Invention) The present invention has the following effects by adopting the above configuration.

A main pipe buried in a roof slab and provided with an annular projection at a lower portion, a ventilation pipe inserted and removed freely into an upper insertion port of the main pipe, and detachably screwed into a lower insertion port of the main pipe. Since it is constructed with a bellows-shaped flexible tube, it can be buried in the roof slab in advance, so-called pre-construction,
Connection with the extension vent pipe can be facilitated.

By providing a bellows-shaped flexible tube at the lower end of the waterproof joint, it is possible to absorb dimensional errors due to expansion, expansion, contraction, and positional displacement of the extended ventilation pipe, and to easily connect the pipe.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a state in which a waterproof joint for a vertical ventilation pipe according to the present invention is embedded in a roof slab and a vertical ventilation pipe is connected thereto, FIG. 2 is a front view of the same, FIG. FIG. 5 is a plan view, FIG. 5 is a cross-sectional view taken along the line II of FIG. 2, FIG. 6 is a cross-sectional view taken along the line II-II of FIG. 2, and FIG. . In the figure, A: waterproof joint for extended vent pipe 1: main pipe 2: vent pipe 3: flexible pipe m: roof slab.

Claims (1)

(57) [Scope of request for utility model registration] 1. A waterproof joint for a top ventilation pipe for connecting a ventilation pipe protruding from an upper part of a roof surface to a top ventilation pipe, wherein the waterproof pipe is buried when a roof slab is formed, and the ventilation pipe is freely removable. A main pipe provided with an upper insertion port and having an annular projection at a lower portion, and is detachably screwed between a lower insertion port of the main pipe and an upper end portion of the extended vent pipe, and A waterproof joint for a top ventilation pipe, comprising: a bellows-shaped flexible pipe capable of absorbing a dimensional error in an arrangement position of the main pipe and the top ventilation pipe.