JP2000087410A - Drainage trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage trap preventing close contact of a valve element and ensuring a good draining efficiency when water is drained and a good closability when water is not drained. SOLUTION: A pipe port serving as a drainage outflow port is diagonally tilted, and a drainage trap comprises an oscillating valve element 4, which is freely oscillationally supported on an oscillating shaft and capable of opening and closing the pipe port by moving into and out of contact with the pipe port from below, the oscillating shaft being provided at the upper end of a tilted face at the pipe port, and a balance weight 43 energizing the valve element 4 in its closing direction. One or more small projections are formed at the part of the pipe port making contact with the oscillating valve element 4, to support the oscillating valve element 4 at their apexes.

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 is mechanically simple and requires little maintenance.However, depending on the usage conditions, the valve plug adheres to the port due to the residual water remaining along the contact area between the valve plug and the port. Or the opening / closing property of the valve trap may be deteriorated. In such a case, it is necessary to remove the valve trap from the drain pipe and perform cleaning or the like due to the structure of the valve trap, which is troublesome.

[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 can be easily maintained without removing it from a drain pipe. Things.

[0005]

In order to achieve the above object, in the drain trap of the present invention, a lower portion of a casing provided with upper and lower connection pipe portions connectable to an intermediate portion of a drain pipe is provided. And an obliquely inclined step opening end face or a tubular opening end face, and is swingably supported by a swing shaft provided on the upper end side of the slope of the opening end face. A swing valve body that is openable and closable at the opening end face, and a balance weight that urges the valve body in a closing direction. A drainage trap, comprising: a maintenance opening communicating with a position overlapping with a swinging trajectory of a body, and closing the opening with a removable lid.

[0006]

1 to 4 show a drain trap 1 according to an embodiment of the present invention. In the figure, a drain trap 1 is provided with a swing valve body 4 inside a casing 3 provided with connection pipe portions 3a and 3b connectable between drain pipes 2a and 2b.

The casing 3 comprises an upper casing 31 (primary casing) and a lower casing 32 (secondary casing). The upper casing 31 slopes the lower half of the short cylinder formed by extending the connecting pipe 3a downward (30 °).
A tubular portion 33 having a shape cut to about 45 ° is formed, and a bulged portion 34 in FIG. 2 is formed at an upper end portion of the tubular portion 33.

The upper end of the inclined opening (step portion) 35 of the tubular portion 33 is about 1/4 (about 1/1 in terms of opening area ratio).
An overhanging piece 36 is formed in the arcuate portion corresponding to 0), and
Below the portion where the overhanging piece 36 is formed,
Shaft 3 laid over a semi-cylindrical protruding edge 37 projecting downward
The valve element 4 is swingably supported by 9. The protruding edge 37
And the tubular portion 33 are formed in series, and the lower casing 32
And the fitting part.

The valve body 4 has an outer shape having the inclined opening 35.
A valve main body 41 having a substantially elliptical shape having the same shape as that of the valve main body 41 and a flat plate-shaped weight holding portion 42 connected thereto.
, A balance weight 43 is fixed. The weight holding portion 42 is bent and connected to the valve main portion 41, and the bent portion forms a bearing portion 44 through which the support shaft 39 is inserted.

The lower casing 32 is provided with the casing 3
An upper end portion 38 that fits with the valve body 1 has an elongated cylindrical shape that bulges rearward of the valve body 4, and has a maintenance opening 5 that is positioned laterally with respect to the valve body 4.

The maintenance opening 5 has a short cylindrical shape slightly projecting to the side of the lower casing 32.
A screwing portion 51 is formed on the inner peripheral surface, and the screwing portion 61 of the lid 6 is screwed through the packing 7 so as to be able to be closed. As shown in FIG. 2, the maintenance opening 5 is opened at a position below the opening 35 of the casing 31 and at a side surface thereof and overlapping with the swing locus (4-4 ′) of the valve body 4. ing. In particular, in the illustrated example, the maintenance opening 35 also partially overlaps with the (A) tubular portion 33, and in this portion A, the opening 5 contacts the outer peripheral surface of the tubular portion 33 and the opening 35 in contact with the valve body 4. The end face is directly visible.

Drainage trap 1 constructed as described above
Usually, the valve body 4 is urged in the clockwise direction in FIG. 2 by the weight of the balance weight 43 to abut the end face of the opening 35 of the tubular portion 33, the opening 35 is closed by the valve body 4, and the drain pipe 2b Infiltration of foul odors and pests from the side is prevented.

When drainage is present, if the amount of drainage is small, a certain amount of drainage W corresponding to the weight of the balance weight 43 remains in the tubular portion 33, and the drainage W causes the valve 4 and the opening to open. While maintaining the sealing state with the valve body 4.
Is slightly pushed down, and the drainage flows down. On the other hand, when the amount of drainage is large, the valve body 4 is pushed down as 4 'against the urging force of the balance weight 43 as shown in FIG.

When cleaning the drain trap 1,
If the lid 6 is turned to remove it, the maintenance opening 5 is opened, and the balance 4 is pushed up to lower the valve 4 as shown at 4 ', the upper surface of the valve 4 and the tubular portion 33 are formed.
The inner peripheral surface and the periphery of the opening 35 can be easily cleaned using a brush or the like.

In particular, due to the above-described arrangement of the maintenance opening 5, the end face of the opening 35 of the tubular portion 33 which is on the near side as viewed from the maintenance opening 5 is not shaded by the pipe wall of the lower casing 32. Parts can be easily and reliably cleaned.

When the valve body 4 is pushed down, the tubular portion 33
The drainage W that has been left in the middle of FIG.
Since it flows down to the lower left of the center, it does not flow out to the worker side, that is, the maintenance opening 5 side, and there is an advantage that cleaning is easy.

In the above-described embodiment, the cover 6 is connected to the threaded portion 6.
Although the case of fixing with 1 and 51 is shown, the cover 6 may be fixed by other fixing means such as a bolt or a toggle clamp. In this case, the cover 6 and the maintenance opening 5 may be fixed. It may be surprisingly cylindrical. Further, in the above embodiment, the case where the tubular portion 33 of the upper casing 31 is in close contact with the lower casing 32 has been described, but the tubular portion 33 may be located in the middle of the lower casing 33. The material of each member is not particularly limited, but the casing, particularly the lower casing 32, is preferably made of a transparent member such as a resin.

[0018]

Since the drain trap of the present invention is constructed as described above, it is possible to easily open the inside of the casing, the valve body, and the necessary parts such as the contact portions thereof without opening the lid and removing it from the drain pipe. It can be reliably cleaned, and is most suitable for use under poor use conditions such as scum and slime in drainage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a trap for drainage according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a drain trap according to the embodiment of the present invention.

FIG. 3 is a plan view showing a drain trap according to the embodiment of the present invention.

FIG. 4 is a back sectional view showing a state in which a lid of the drain trap according to the embodiment of the present invention is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage trap 3 Casing 3a, 3b Connection pipe part 4 Valve body trap unit 5 Maintenance opening 6 Lid 31 Upper casing 32 Lower casing 33 Tubular part 35 Opening 43 Balance weight 51, 61 Screw part

Claims (1)

[Claims] 1. A step opening end face or a pipe type opening end face facing downward and inclined obliquely inside a casing provided with upper and lower connection pipe portions connectable to an intermediate portion of a drain pipe. A swing valve body that is swingably supported by a swing shaft provided on the upper end side of the inclined surface of the opening end surface, and that is capable of opening and closing the opening end surface by coming into contact with and separating from the opening end surface from below. In the drain trap provided with a balance weight that urges the valve body in the closing direction, a side opening of the casing is provided with a maintenance opening communicating with a position overlapping with the swing trajectory of the swing valve body, A drain trap, wherein the opening is closed with a removable lid.