JP2000054452A - Drain trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain trap excellent in the opening/closing performance of a valve element even in the service condition low in the frequency of drain and very slimy. SOLUTION: A drain trap is composed of an inclined pipe port 42 forming a drain outflow port; an oscillating valve element 43 oscillatingly supported to an oscillating shaft provided on the upper end side of the inclined face of the pipe port 42, and brought into contact with and separated from the pipe port 42 from the lower side to open/close the pipe port 42; and a balance weight 44 energizing the valve element 42 in a closing direction. One or more small protrusions 42a are formed at a contact part of the pipe port 42 with the oscillating valve element 43, and the oscillating valve element 43 is supported on the top of the protrusion 42a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trap for drainage.

[0002]

2. Description of the Related Art Conventionally, drain pipes have been provided with an S-shaped trap for the purpose of preventing intrusion of bad odors, pests and the like from the outlet side. Since this S-shaped trap is for preventing the invasion of bad smells and pests by the drainage collected in the bent portion of the drain pipe, there is a problem that the bent portion is liable to be clogged with solids and the like.

Therefore, the present applicant has provided a balance weight on a swing valve element capable of opening and closing a pipe port, and when there is no drainage, closes the pipe port with the valve element using the balance weight.
At the time of drainage, a valve trap has been developed that opens the valve body by the weight of the drainage or the flowing water pressure and allows the drainage to flow down. This valve trap requires little maintenance because it is mechanically simple.However, when the frequency of drainage is low and there is a lot of slime, it adheres along the contact part between the valve body and the port. There is a problem that the valve body adheres to the pipe opening due to the remaining water scale and the like, and the opening / closing property of the valve trap is deteriorated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and has as its object to provide a drain trap which has a low frequency of drainage and has good openability even when slime is large. It was made for the purpose.

[0005]

In order to achieve the above-mentioned object, in the drain trap of the present invention, a pipe port forming a drainage outlet is inclined at an angle and provided on the upper end side of the inclined surface of the pipe port. A swinging valve body that is swingably supported by the swinging shaft, that is capable of opening and closing the port by coming into contact with and separating the port from below, and a balance weight that biases the valve in the closing direction. In the drainage trap, one or more small protrusions are formed at a contact portion of the port with the swing valve body, and the swing valve body is supported at the top. Further, one or more small ridges may be formed at a portion of the swing valve body that comes into contact with the port, and only the top portion may contact the port.

[0006]

1 to 3 show a drain trap 1 according to a first embodiment of the present invention. In FIG. 1, a drain trap 1 has a valve trap unit 4 provided inside a casing 3 provided between drain pipes 2a and 2b.

[0007] The valve trap unit 4 has a tube 41 having a shape in which the lower half of a short cylinder whose length is substantially the same as the diameter is cut obliquely (about 30 °), and an inclined port 42 thereof. And a balance weight 44 for urging the valve body 43 in the closing direction.

[0008] The pipe port 42 has about one third of the upper end side of the inclination.
A projecting piece 45 is formed at an arcuate portion corresponding to (an opening area ratio of about 1/4), and a pair of downwardly projecting supports are formed on both sides of the portion where the projecting piece 45 is formed. An arm 46 is provided, and the valve element 43 is supported by a support shaft 47 extending between the support arms 46 so as to be swingable.

The valve body 43 includes a valve main body 43a having a substantially elliptical shape having the same shape as the pipe port 42, and a weight holding portion 43b connected thereto.
The weight holding portion 43b is bent and connected at an angle of about 135 ° to the valve main portion 43a, and a bent portion forms a bearing portion 43c through which the support shaft 47 is inserted. .

Further, a small projection 42a is provided at the lower end of the inclination of the pipe port 42 and the contact portion with the valve body 43. In the illustrated example, the small projection 42a shows a case where a metal pin (42a) made of a different material from the tube 41 is embedded in the end face of the tube opening 42. However, the small protrusion 42a is integrally formed of the material of the tube 41 itself. Of course, it may be possible.

A flange portion 48 is formed at the upper end of the valve trap unit 4 so as to protrude outward in the radial direction.
The valve trap unit 4 is fixed to an intermediate portion of the casing 3 by screwing the respective portions 3a and 3b together while holding the valve traps 4a and 3b.

Drainage trap 1 constructed as described above
Is usually the balance weight 4 as shown by the solid line in FIG.
4, the valve body 43 is urged in the clockwise direction in the figure to approach the pipe port 42, and the small projection 42 provided on the pipe port 42.
a.

In this state, a small gap 42c is formed between the pipe port 42 and the valve body 43 by the small projection 42a. By setting the small gap 42c to be very small, as shown in FIG. As described above, the drainage W always remains in the pipe 41 by a certain amount where the weight of the drainage W and the surface tension in the small gap 42c are balanced, and the small gap 4
2c is sealed to prevent infiltration of odors and pests from the drain pipe 2b side.

When there is drainage, if the amount of drainage is large, the valve body 43 is pushed down like 43 'against the urging force of the balance weight 44 by flowing water pressure, and drained directly downward. The same applies to the case where the amount of drainage is small, but a certain amount of drainage W remains in the pipe 41 and the small gap 4
The valve body 43 is pushed down while maintaining the sealing state of 2c, and the drainage flows down from the small gap 42c.

If the weight of the balance weight 44 is too light, the valve body 43 is unnecessarily opened when a small amount of water is drained, and there is a possibility that a bad smell or the like may enter. For this reason, in order to obtain the opening degree of the valve body 43 corresponding to the drainage amount when a small amount of water is drained, and to ensure that the valve body 43 is closed when the drainage is stopped or when the drainage is not performed, the balance weight 44 must have a certain weight. However, in the trap for drainage of the present invention, as shown in FIG.
A small gap 42c is formed between the valve body 43 and the pipe port 42,
Further, since the valve element 43 is supported by the small projections 42a in point contact, the valve element 43 does not adhere to the pipe port 42 even when the weight of the balance weight 44 is optimized, and the pipe element 41 The amount of wastewater W remaining in the pipe is reduced, and the pipe 4
Since the amount of dirt attached to the valve body 43 and the valve body 43 is also reduced, the open / close property of the valve body 43 is always kept good even under poor use conditions such as slime in drainage.

In the drain trap 1 of the above embodiment, the case where one small projection 42a is provided at the lower end of the pipe opening 42 is shown, but a plurality of small projections may be provided. Also, as in the second embodiment shown in FIG. 4, a large number of small projections 42b are formed in the pipe opening 42 in a waveform, and a large number of small gaps 42c are formed between them and the valve body 43. Is also good. In addition, port 4
2 is to form a corrugated small ridge 53 (concave groove) on the valve body 43 as in the third embodiment shown in FIG. Can also be.

In the above embodiment, the drain trap 1 is connected between the drain pipes 2a and 2b. However, the drain trap 1 may be provided at the start or end of the drain pipe. In the case of providing at the inlet, the casing 3 may be omitted and the valve trap unit 4 may be directly inserted into the drain port.

[0018]

Since the drainage trap of the present invention is constructed as described above, it is possible to prevent the close contact between the valve body and the pipe opening even under poor use conditions such as high drainage viscosity and sliminess. The openability of the body is always kept good, and the closeability when not drained is also good, so that the invasion of bad smells and pests can be surely prevented.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a drain trap according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a valve trap unit of the drainage trap according to the first embodiment of the present invention.

FIG. 3 is an enlarged side sectional view showing a main part of the drain trap according to the first embodiment of the present invention.

FIG. 4 is an enlarged side sectional view showing a main part of a drain trap according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a valve body in a drain trap according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage trap 2a, 2b Drainage pipe 4 Valve trap unit 41 Pipe 42 Pipe mouth 42a, 42b Small projection 42c Small gap 43 Valve 44 Balance weight 53 Small ridge

Claims (2)

[Claims] 1. A pipe port forming an outlet for drainage water is inclined obliquely, and is swingably supported by a rocking shaft provided on an upper end side of an inclined surface of the pipe port, and is connected to the pipe port from below. In a drainage trap composed of a swing valve body capable of opening and closing the pipe opening and a balance weight for urging the valve body in a closing direction, one part of the pipe mouth is in contact with the swing valve body. Alternatively, a drainage trap formed by forming a small projection larger than the projection and supporting the swing valve body at the top thereof. 2. A pipe port forming an outlet for drainage water is inclined obliquely, and is swingably supported by a swing shaft provided on an upper end side of an inclined surface of the pipe port, and is connected to the pipe port from below. In a drainage trap composed of a swing valve body capable of opening and closing the pipe opening and a balance weight for urging the valve body in the closing direction, one part of the swing valve body contacts the pipe mouth. Or a drainage trap formed by forming a small ridge having a diameter larger than that of the ridge, and having only a top portion thereof in contact with a pipe opening.