JPS5851269Y2 - drainage fittings - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drainage fitting which can effectively prevent water leakage and which can be avoided from metal castings or plastic moldings used in washstands, sinks, etc.

In conventional drain fittings, the water pipe was screwed into the drain fitting by fitting the drain fitting into the fitting, backing, and tightening it with a nut through a washer. could not be effectively prevented.

Therefore, instead of the nut shown in Japanese Utility Model Application No. 50-107436, a flange was provided at the end of the water pipe.

This is shown in FIG. 1 and will be explained in detail below.

A drain fitting 4 is fitted into the drain opening 2 of the washbasin 1 via a backing 3. 5 is a hole drilled in the center of the drain fitting 4 to allow drainage to pass through the overflow channel 6, and 7 is a hole for draining water. This is a stop that extends in a cross shape inside the drain fitting 4 to prevent the pipe from clogging.

Then, a water pipe 12 having a flange 11 at its end is screwed onto a male thread 8 formed on the outside of the drain fitting 4 through a triangular backing 9 and a washer 10, and a female thread 13 provided on the inside thereof. By tightening the triangular backing 9
abut against the outer edge of the washbasin 1 and connect the drain fitting 4 and the water pipe 12.
This is to fix the

According to this, by making the water pipe 12 also serve as a bolt, drainage water no longer leaks from between the bolt and the water pipe 12, but the water pipe itself is rotated by hand and screwed together. Since a large amount of effort is required to tighten the triangular backing 9 with the outer edge of the washbasin 1, there may be variations in the tightening force, and there is a risk that the triangular backing 9 and the outer edge of the washbasin 1 will not be properly isolated from each other.

In addition, originally, a part of the wastewater flowing from the overflow channel 6 would pass through the contact area between the drain fitting 4 and the triangular backing 9, and furthermore, the washer 10, and the drain fitting 4 would pass through the contact area between the drain fitting 4 and the water pipe 12. It passes through the gap between the threaded portions of the male and female screws 8 and 13, and flows down into the water pipe 12 as it is.

However, if the screws are tightened too strongly, the gap between the threaded screws 8 and 13 will be very narrow, and since they are spirally long, the contact area between the drain fitting 4 and the triangular backing 9, etc. Some of the wastewater that has passed through
This has the drawback that the smooth flow of water is blocked and the water stagnates, which may also be a cause of water leakage.

Therefore, the present invention was devised to solve the above-mentioned drawbacks, and it is a drain fitting that fits into the drain outlet a water pipe with a female thread formed on the inside of one end and a flange formed on the outside. In a drainage fitting that is screwed onto a male thread through a packing and a washer, an annular protrusion is provided on the abutting surface of the flange of the water pipe with the washer, and a cross-sectional The female thread of the water pipe which is to be screwed into the drain fitting is provided with a tightening part having a rectangular shape.
By carving the water flow groove from the start end to the end end so as to intersect with the screw direction, the tightening part can be tightened after the water pipe is screwed into the drain fitting, making assembly easy. To provide a drainage fitting that not only allows water to be drained, but also prevents water leakage and seepage more reliably than conventional products due to the water passage grooves and protrusions of the water pipe.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in FIGS. 2 and 3, on the upper outer circumferential side near the flange 11 of the water pipe 12, there is a wall thicker than the wall of the water pipe 12.
A tightening portion 14 having a square cross section such as a hexagonal nut shape (hexagonal bolt head) is provided around the drain outlet fitting 4.
A water passage groove 15 extending from the starting end 18 to the terminal end 19 is carved in the female thread 13 of the water pipe 12 to be screwed with the water pipe 12 so as to intersect with the thread direction. An annular protrusion 16 is provided on the surface that contacts the washer 10, for example, on the outer peripheral edge of the upper surface of the flange 11, so as to bring the washer 10 into close contact with the flange 11.

Reference numeral 17 is an arcuate notch formed on the inner circumferential surface of the flange 11 of the water pipe to serve as a mouth for receiving leakage water.

FIG. 4 shows another embodiment of the water pipe 12, in which the flange 11 of the water pipe 12 extends downward to be integrated with the flange 11, and has a hexagonal nut shape in cross section. By configuring it as such, it also serves as the tightening portion 14.

In the drawings, the tightening portion 14 is formed to have a hexagonal nut shape in cross section, but since it is a locking point that is tightened with an instrument, it may have a square nut shape in cross section.

As shown in FIG. 5, the water passage groove 15 is provided with four grooves so as to intersect with the thread direction of the female thread 13 of the water pipe 12. It may be provided in the axial direction of the screw 8 or may be provided on both sides.

Since the present invention is constructed as described above, after the female thread 13 of the water pipe 12 is screwed into the male thread 8 of the outlet fitting 4, the tightening portion 14 of the water pipe 12 can be tightened with an instrument such as a spanner. Therefore, not only is the assembly easy, but the triangular backing 9 will surely bite into the outer edge of the bottom of the washbasin 1.

Therefore, a part of the drainage flowing from the overflow channel 6 is transferred to the drain fitting 4, the triangular backing 9, and the washer 1.
Even if water flows through the gap at the joint with the water pipe 12, the receiver of the water pipe 12 enters the water pipe 12 through the opening 17 and the water passage groove 15 of the water pipe 12, so there is no risk of water leaking outside.

Moreover, even if some waste water accumulates in the opening 17 of the receiver, the protrusion 16 of the water pipe 12 is fitted into the washer 10, so water will not seep out from between the water pipe 12 and the washer 10. .

Generally, the water passing through the water passage 15 is sucked by the drainage flowing down from the hole 5 bored in the center of the drain fitting 4 through the overflow channel 6, and is poured into the water pipe 12 without stagnation.

That is, due to the presence of the water flow grooves 15 and the protrusions 16 of the water flow pipe 12, water leakage and seepage can be prevented more reliably than in conventional products.

Furthermore, since the water pipe 12 is provided with a tightening portion 14, it is possible to facilitate the workability of screwing and tightening the drain fitting 4, and to maintain a constant tightening force for tightening. can.

As explained above, according to the drainage fitting according to the present invention,
Since the tightening part can be tightened after the water pipe is screwed into the outlet fitting, assembly is not only easy, but the water flow grooves and protrusions of the water ice pipe prevent water leakage and seepage compared to conventional products. Various effects can be obtained, such as ensuring that

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a sectional view of a conventional drainage fitting, Fig. 2 is a sectional view of a drainage fitting according to the invention, and Fig. 3 is a partial longitudinal section of a water pipe. 4 are side views showing another embodiment of the water pipe, and FIG. 5 is a plan view thereof. 1...Wash basin, 2...Drain port, 3...
... Backing, 4... Drain fitting, 5.
... Hole, 6 ... Overflow channel, 7
...Stop, 8...Male thread, 9...
...Triangular backing, 10...Washer, 11
...Flange, 12... Water pipe, 13
...Female screw, 14...Tightening part, 15.
...Water groove, 16...Protrusion, 17...
...Uke is mouth, 18...Starting end, 19...
・Terminal part.

Claims (1)

[Scope of utility model registration request] 1. In a drainage fitting in which a water pipe with a female thread formed on the inside at one end and a flange formed on the outside is screwed into the male thread of the drain fitting through a packing and a washer, the water pipe is fitted into the drain port, and the washer at the flange of the water pipe An annular protrusion is provided on the contact surface with the water pipe, and a tightening part with a square cross section is provided on the outer circumferential side of the upper part of the water pipe. A drainage fitting characterized in that the female thread is provided with a water passage groove extending from the starting end to the terminal end so as to intersect with the direction of the thread. 2. The drainage fitting according to claim 1, wherein the tightening portion of the water pipe is formed to be thicker than the wall thickness of the water pipe. 3. The drain fitting according to claim 1, wherein the tightening part of the water pipe is formed integrally with the flange so that the flange itself extends downward.