JP2016047986A - Drain trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain trap being higher in closability of a valve element and a trap body, and capable of arranging a support shaft in the flexural center of a valve member.SOLUTION: The present invention is constituted of a cylindrical trap main body 1a formed so that a lower opening becomes an inclined plane backward, a shielding plate 2 provided so as to cover the rear part side of a lower opening of the trap main body 1a and a valve member 4 for opening-closing a space part of being not blocked up by this shielding plate 2, and is formed as a drain trap 1 by being rockably journaled by a reverse surface of the shielding plate 2 or the trap main body 1a so that a clearance is not caused when its part is brought into close contact with the reverse surface of the shielding plate 2, and closability of a valve main body 4 and the trap main body 1a is enhanced. Thus, propagation of an odor and intrusion of an insect and a small animal can be surely prevented, and intrusion of smoke can also be prevented in a fire.SELECTED DRAWING: Figure 1

Description

The present invention relates to a drain trap disposed in the middle of a drain pipe or at a pipe end.
More specifically, it relates to a drain trap that is provided under the floor of an office building or a plant and distributes drainage, and belongs to a piping technology and a building construction technology.

Prevents the spread of odors and insects and small animals from the downstream side of the piping route for wastewater discharged from commercial or household air conditioners, refrigerators, kitchen equipment, electric water heaters, and emergency wastewater. A trap for drainage is provided.
As such a drain trap, an S-shaped trap is generally used.
However, since the S-shaped trap uses the sealing action of the drainage accumulated in the bent part of the drainage pipe, the drainage in the trap evaporates and the sealing action is obtained when the frequency of drainage is low. There is an increasing number of cases where a valve trap (mechanical trap) is used instead of an S-shaped trap.

The valve trap is provided with a balance weight on the swingable valve body, and when there is no drainage, the valve body is closed with the balance weight. At the time of drainage, the valve body is opened with the weight of the drainage or flowing water pressure, and the drainage flows down. It is something to be made.
An example of such a drain trap is disclosed in Patent Documents 1 and 2.

In Japanese Patent Application Laid-Open Publication No. 2004-197452 (Patent Document 1),
The pipe port that forms the drainage outlet is inclined obliquely and is swingably supported by a shaft provided on the upper end side of the inclined surface of the pipe port. The pipe port is opened and closed from the lower side to open and close the pipe port. In a drainage trap composed of a possible valve body and a balance weight that biases the valve body in a closing direction,
Forming a buffer resin layer on at least the upper surface of the valve body;
A drain trap has been proposed in which the buffer resin layer is in contact with the end face of the pipe opening.

  In this drainage trap, instead of forming a buffer resin layer on the valve body, a buffer resin layer is provided along the end surface of the pipe opening so that the buffer resin layer contacts the valve body. It is said that it is possible to construct a trap for drainage that is excellent in quietness, suppresses the generation of abnormal noise due to noise, and the buffering resin layer enhances the closing performance between the valve body and the pipe opening, and is also effective in preventing leaks (Paragraph 0017).

Further, in Japanese Patent Application Laid-Open No. 2010-275763 (Patent Document 2), each of the trap main bodies having a flat bottom surface has a connection portion for connecting a drain pipe, and an opening portion in the upper portion. And in the horizontal type drainage trap in which the opening can be opened and closed by a cap member,
In the trap main body constituting the drain trap, a mounting seat for horizontally opening and closing a valve body having a balance weight is disposed horizontally,
A valve seat that is always in contact with the valve body and has a flow hole for drainage is provided to be inclined in the downstream direction from one end portion to the bottom portion of the mounting seat, and is divided into a drainage inflow portion and a drainage outflow portion. And
The valve body is swingably held on a mounting base that is detachably mounted on the mounting seat,
A drainage trap has been proposed in which a mounting base holding the valve body is configured to be removable from the mounting seat by removing the cap member.

This trap for drainage uses a swingable valve body having a balance weight to block the drainage inflow portion and drainage outflow portion. The horizontal trapping type also uses retained water as in the past. It is said that the transmission of the odor from the downstream side and the invasion of insects and small animals are surely prevented (paragraph 0021).

JP 2004-197452 A (Claims, FIGS. 1 to 5) Japanese Patent Laying-Open No. 2010-275763 (Claims, FIG. 1)

The drain traps disclosed in each of the patent documents described above all attempt to achieve the purpose of reliably preventing the transmission of odors and the invasion of insects and small animals by using a swingable tongue-like valve body. To do.
However, in the drainage trap disclosed in each of the above patent documents, between the valve body and the trap body, specifically, a support shaft for swinging, a bearing portion that holds the support shaft, and the trap body Since a slight gap is generated between the two, it is not sufficient in terms of reliably preventing the transmission of odor and the invasion of insects and small animals.
Furthermore, in the event of a fire, since the trap body is made of resin, there is a possibility that smoke may enter from a slight gap between the bearing portion and the trap body in addition to the possibility of deformation due to heat. Had.

In view of the present situation, the present invention is intended to provide a drainage trap in which the valve body and the trap body are more closed and the support shaft can be arranged at the bending center of the valve member.

That is, the invention according to claim 1 according to this invention is
A cylindrical trap main body formed so that the lower opening is inclined toward the rear, a shielding plate provided so as to cover the rear side of the lower opening of the trap main body, and a space not blocked by the shielding plate And a valve member that opens and closes the part,
A part of the valve member is pivotally supported by the shielding plate or the trap main body so that a part thereof is in close contact with the back surface of the shielding plate and no gap is formed between the valve member and the shielding plate. This is a drainage trap.

The invention according to claim 2 of the present invention is
The drainage trap according to claim 1,
The valve member is
A plate-like body having an elliptical shape is bent into a side shape when viewed from the side, and one side having a small area is used as a mounting portion for a balance weight, and the other side is used as an opening / closing portion for the space mainly composed of the trap. It is.

The invention according to claim 3 of the present invention is
The drainage trap according to claim 1,
The valve member is
A bearing is provided at each end of the bent portion formed in a letter shape in a side view.

The invention according to claim 4 of the present invention is
In the drain trap according to claim 1 or 2,
All members other than the balance weight are
It is composed of stainless steel.

The drain trap according to the present invention is a cylindrical trap main body formed so that the lower opening becomes an inclined surface toward the rear, and the rear side of the lower opening is closed by a shielding plate and is not closed by the shielding plate. Since the valve member for opening and closing the part is pivotally supported by the trap main body or the shielding plate in a state where a part of the valve member is always in close contact with the back surface of the shielding plate, the closing performance between the valve main body and the trap main body is enhanced Yes.
Therefore, according to the drain trap of the present invention, it is possible to reliably prevent the transmission of odors and the invasion of insects and small animals, and further prevent the invasion of smoke during a fire.

  In particular, according to the present invention, the valve member is bent (bent) in a “h” shape when viewed from the side, and a bearing that pivotally supports the valve main body is disposed directly below the bent portion. The manufacturing accuracy of the valve member can be greatly improved.

Furthermore, the drain trap according to the present invention can be constructed of non-flammable or flame retardant materials such as stainless steel, so that there is no problem of burning in the event of a fire.

It is a disassembled perspective view of one Example of the trap for drainage of this invention. It is a partially cutaway side view of the valve member which comprises the drain trap of this invention. FIG. 3 is a half-bottom view of the valve member shown in FIG. 2. FIG. 2 is a side sectional view showing a state in which a valve member is closed in the drain trap shown in FIG. 1. FIG. 2 is a side sectional view showing a state where a valve member is opened in the drain trap shown in FIG. 1. It is a front view of the valve member shown in FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a drain trap according to the present invention will be specifically described with reference to the accompanying drawings.
The drain trap of the present invention is not limited to the illustrated embodiment, and can be improved within a range not changing the gist of the invention.

  As shown in FIG. 1, a drain trap 1 according to the present invention includes a stainless steel trap main body 1a whose lower opening serving as an outlet 1d is slanted, and a shield provided at a lower opening at the rear of the trap main body 1a. The valve member 4 made of the same material and the valve member 4 are normally closed so that the plate 2, the space formed between the front edge of the shielding plate 2 and the inner peripheral surface of the trap main body 1a can be opened and closed. The balance weight 7 is biased in the direction.

The trap main body 1a is composed of a short cylindrical body, and a flange 1b is formed at the opening of the inflow port 1c, and the lower outflow port 1d is cut so as to incline obliquely upward from the front surface toward the rear surface. It is a thing.
In this embodiment, the drain trap 1 is made of a metal material such as stainless steel, but may be made of another material such as a synthetic resin material.

  A shielding plate 2 that partially covers the upper side of the outlet 1d is fixed to the inner peripheral surface of the rear opening of the outlet 1d of the trap main body 1a.

  The shield plate 2 is provided with a pair of bearings 3, 3 attached to the front end side of the rear surface thereof in a state of projecting downward with a predetermined interval, and a support shaft 5 supported between the bearings 3, 3. Further, the tongue-like valve member 4 is supported so as to be swingable.

  The shielding plate 2 secures an accommodation space for the balance weight BW in the trap main body 1a and causes the drainage to flow along the valve member 4. The valve member 2 is unnecessarily opened by the flowing water pressure of the drainage. It also has a function to prevent this.

  2 and 3, the valve member 4 has a base end side (short side) of an elliptical valve main body 4a in which a portion in contact with the inner periphery of the trap main body 1a is formed in the same shape as the inner periphery. The projecting part 4b is formed by cutting out the opposite part) inwardly to form a mounting part for the balance weight 7 so that the base end of the projecting part 4b has a "h" shape in a side view. A bent portion 4e is formed by bending, and an engaging hole 4c that engages with a pair of engaging pieces 6 and 6 provided in the balance weight 7 is provided in the protruding portion 4b.

In this embodiment, the valve member 4 is pivotally supported by the shielding plate 2 in a swingable manner, but may be pivotally supported by the trap main body 1a.
At that time, as shown in FIG. 2, by providing bearings 4d and 4d at the center of the bent portion 4e, the manufacturing accuracy of the valve main body 4a can be improved.

  The valve main body 4a is inserted into the engagement holes 4c and 4c formed in the protruding portion 4b thereof by inserting the engagement pieces 6 and 6 formed on the surface of the balance weight 7 so as to perform appropriate means such as welding or adhesion. Fixed by.

Further, the valve main body 4a is pivotally supported on the back surface side of the shielding plate 2 by the support shaft 5 in a state where drainage does not flow, and the balance weight 7 is attached to the back surface thereof. As a result, the base end side of the valve main body 4a is in close contact with the shielding plate 2 of the trap main body 1a.
Therefore, it is possible to prevent the transmission of odor and the invasion of insects and small animals.

  The drainage trap 1 composed of such a constituent member pivotally supports the support shaft 5 disposed in the bent portion 4e of the valve main body 4a on bearings 3 and 3 provided on the shielding plate 2 of the trap main body 1a, and It can be swung with respect to the shielding plate 2.

  Therefore, the drain trap 1 arranged in the piping path is not shown in FIG. 4 when there is no drainage or when there is no drainage amount required to swing the valve body 4a. 4a always abuts against the tip of the shielding plate 2 by the action of the balance weight 7 and closes the outlet 1d, so that drainage does not flow to the drain pipe (not shown) side.

  On the other hand, as shown in FIG. 4, waste water from an air conditioner or the like flows in from the inlet 1c, accumulates in the trap main body 1a, and is attached to the balance weight 7 by the gravity of the accumulated waste water or the flowing water pressure of the drained waste water. When the valve main body 4a is pressed toward the outlet 1d against the force, the valve body 4a swings downward with the support shaft 5 as a fulcrum as shown by a chain line in FIG. Open.

When the outlet 1d is opened, the wastewater that has flowed into or accumulated in the trap main body 1a is discharged through the outlet 1d.
After that, when the water pressure on the valve main body 4a is released, the valve main body 4a is rotated upward about the support shaft 5 by the action of the balance weight 7 attached to the base end portion thereof, and the outlet 1d. Close.

  In this embodiment, the drain trap 1 is a vertical drain trap 1 provided at the start end of a drain pipe (not shown). It can be applied to various drainage traps such as a drainage trap to be connected.

  Further, when it is necessary to provide the drain trap 1 at the middle part of the drain pipe, a configuration in which the drain trap 1 is accommodated in a cylindrical casing having drain pipe connecting portions at the top and bottom, or integral with the casing A form formed by forming may be adopted.

The drain trap having such a configuration is formed such that the rear side of the lower opening of the trap main body 1a is always closed by the shielding plate 2, and is formed between the front edge of the shielding plate 2 and the lower inner peripheral portion of the trap main body 1a. Since the space portion is configured to be always closed by the valve main body 4 that is pivotally supported on the back surface of the shielding plate 2 and has the balance weight 7 on the base end side, the propagation of odor from the drain pipe side Invasion of insects and small animals can be suppressed.
In particular, in the present invention, since the rear side of the valve main body 4 is attached to the back surface of the shielding plate 2, the odor propagation from the drain pipe side and the invasion of insects and small animals are reliably prevented. The

When the trap for drainage according to the present invention is provided in the trap main body, the valve main body and a part of the shielding plate can be brought into close contact with each other, so that the closing performance is improved. Small animals can be prevented from entering, and smoke can be prevented during a fire.
Therefore, it is widely used as an industrial or household air conditioner, a refrigerator / freezer, a kitchen appliance, an electric water heater, and a drain trap used in a portion requiring drainage such as emergency drainage.

DESCRIPTION OF SYMBOLS 1 Drain trap 1a Trap main body 1b Flange 1c Inlet 1d Outlet 2 Shielding plate 3,3 Bearing 4 Valve member 4a Valve main body 4b Protruding part 4c Engagement hole 4d Bearing 4e Bending part 5 Supporting shaft 6 Locking piece BW balance weight

The invention according to claim 4 of the present invention is
The drain trap according to claim 2 ,
All members other than the balance weight are
It is composed of stainless steel.

Claims (4)

A cylindrical trap main body formed so that the lower opening is inclined toward the rear, a shielding plate provided so as to cover the rear side of the lower opening of the trap main body, and a space not blocked by the shielding plate And a valve member that opens and closes the part,
The valve member is pivotally supported by the shielding plate or the trap main body so as to be swingable so that a part of the valve member is in close contact with the back surface of the shielding plate and no gap is formed between the valve member and the shielding plate. A drain trap. The valve member is
A plate-like body having an elliptical shape is bent into a letter shape in a side view, and one side having a small area is used as a mounting portion for a balance weight, and the other side is used as an opening / closing portion for a space portion mainly composed of the trap. Item 2. A drainage trap according to Item 1. The valve member is
The drainage trap according to claim 1, wherein a bearing is provided at each end of the bent portion formed in a letter shape in a side view. All members other than the balance weight are
The drainage trap according to claim 1, wherein the trap is made of stainless steel.