JP2009256974A - Drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain trap having a self-cleaning function by which the inside of the trap can be cleaned by itself using the discharged water flowing into it. <P>SOLUTION: A plurality of fins 4c having a whorl shape in plan view for generating a swirling flow are radially arranged between a lower end opening part 3a of a foam stopping pipe 4 and a lower bottom surface of a water-sealing cup 2 and toward a peripheral wall of the water-sealing cup 2. A swirling force in the periphery direction is given to the discharged water passing the fin part by the fin for generating the swirling flow so that the discharged water flowing from the lower end opening part 3a of the foam stopping pipe 4 into the water-sealing cup 2 becomes an upward swirling flow. A front end edge of the lower end opening part 4a of the foam stopping pipe 4 is folded back outward to obtain a ring-shaped folded part 4b having a semicircular shape in a cross section. A lower bottom surface of the water-sealing cup 2 is a ring-shaped recessed channel bottom surface 2b obtained by rotating the recessed channel of the semicircular shape in a cross section once around a central axis z-z of the water-sealing cup. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drain trap used in a waterproof pan of a washing machine or a drain outlet of a floor surface, and more particularly to a drain trap that realizes a self-cleaning function inside the trap using drained water. It is.

  This type of drainage trap is disposed in a waterproof pan of a washing machine or a drainage port on the floor, and is used to discharge drained water flowing from a drainage hose into a drainage pipe disposed under the floor. The wastewater that has flowed from the drainage hose of the washing machine flows into the drainage trap through the hose joint, while preventing the backflow of bad odor from the drainage pipe side connected to the sewerage by the sealing mechanism provided in the drainage trap, The drainage that has flowed in is sent to the drainage pipe (see Patent Documents 1 and 2).

Japanese Patent Laying-Open No. 2006-97408 (full text, full diagram) Japanese Unexamined Patent Publication No. 2007-113225 (full text, full figure)

  Conventionally known drain traps such as the drain traps described in Patent Documents 1 and 2 described above can exhibit an extremely excellent effect in preventing the backflow of malodor from the drain pipe side. However, this type of drain trap is usually used as it is once the drain trap is connected and connected to the drain pipe, and the drain trap is not broken. For this reason, as the years of use have passed, dust, dirt, and foreign matter adhere to the inside of the trap and become dirty. In the worst case, there is a possibility that the water channel in the trap will be clogged by these deposits.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a drain trap having a self-cleaning function capable of self-cleaning the inside of the trap using drained water flowing in. It is.

  In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a bottom having a drain pan connected to a drain pan connecting portion formed at an appropriate position while being fitted and fixed to a waterproof pan or a drain outlet of a floor surface. A bottom having a cup-shaped drain trap body, and is inserted into the drain trap body with a predetermined flow interval between the drain trap body and a drain outlet slit is formed on the upper end side. A cylindrical sealing water cup, a hollow cylindrical sealing cylinder that is inserted concentrically with a predetermined flowing water interval between the sealing cup and communicating with the sealing cup at a lower end opening thereof; A hollow cylindrical foam-preventing pipe that is concentrically fitted with a predetermined flowing water interval between the sealed water cylinder and communicated with the sealed water cup at a lower end opening thereof; A drain hose connected to the tip of the top opening of the trap body In a drain trap in which a joint is detachably fitted by a predetermined lid mechanism and the upper end opening of the anti-foaming pipe is connected to the lower end of the hose joint, the lower end opening of the anti-foaming pipe A plurality of swirling flow generating fins having a spiral shape in plan view are disposed radially between the bottom portion and the bottom surface of the sealing cup, and the swirling flow generating fins are disposed radially toward the peripheral wall side of the sealing cup. Thus, a swirling force in the circumferential direction is applied to the drainage passing through the fin portion, and the drainage flowing into the sealed cup from the lower end opening of the foam stopper pipe becomes an upward swirling flow.

  The invention according to claim 2 is the drain trap according to claim 1, wherein the tip edge of the lower end opening of the foam stopper pipe is folded outward to form an annular folded portion having a semicircular cross section. The bottom surface of the sealing cup has an annular groove bottom surface obtained by rotating the groove having a semicircular cross section around the central axis of the sealing cup between the annular folded portion and the bottom surface of the annular groove. The swirl flow generating fin is disposed.

  According to the first aspect of the present invention, the swirl flow generating fin having a spiral shape in plan view is directed toward the peripheral wall side of the sealed cup between the lower end opening of the foam stopper pipe and the lower bottom surface of the sealed cup. Drainage that is arranged in a radial pattern and gives a swirl force in the circumferential direction to the drainage that passes through the fin portion by the swirling flow generating fins and flows into the sealed cup from the lower end opening of the foam stopper pipe Since the swirl flow is upward, the inside of the trap can be self-cleaned by the swirl flow. This self-cleaning is done every time the wastewater flows in, so that even after a long period of time, there will be no clogging of the flow channel due to dirt, dirt, or foreign matter adhering to the inside of the trap. Can be used.

  According to the second aspect of the present invention, the tip end edge of the lower end opening of the foam stopper pipe is folded outward to form an annular folded portion having a semicircular cross section, and the lower bottom surface of the sealed water cup A circular arc-shaped groove is used as a bottom surface of an annular groove obtained by making one turn around the central axis of the sealing cup, and the swirl flow generating fin is disposed between the annular folded portion and the bottom surface of the annular groove. Therefore, the drainage that flows into the sealed cup from the lower end opening of the foam stopper pipe smoothly flows from the downward flow to the upward flow along the curved surface of the annular folded portion and the bottom surface of the annular groove. It flows into the sealed cup while being changed. For this reason, no turbulent flow is generated in the drainage flowing into the sealed cup from the lower end opening of the foam stopper pipe, and a higher upward swirling flow can be generated. The effect can be further enhanced.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 3 show an embodiment of a drain trap according to the present invention, FIG. 1 is a diagram showing an entire structure of a drain trap according to the embodiment, and FIG. 2 is a diagram showing a structure of a foam stopper pipe. FIG. 3 is a view showing the structure of the sealed water cup.

  As shown in FIG. 1, the drain trap of the present invention includes a bottomed cup-shaped drain trap body 1, and the drain trap body 1 is drained from a waterproof pan A (or floor surface) by a pan support 7. The drainage pipe B connected to the sewer is connected to the drainage pipe connecting portion 1a formed on the peripheral wall surface of the drainage trap main body 1 and used.

  In the drain trap body 1, a bottomed cylindrical sealing cup 2 having a drain outflow slit 2 a on the upper end side is concentrically inserted with a predetermined flow interval between the drain trap body 1. Has been. Further, a hollow cylindrical sealing cylinder 3 communicating with the sealing cup 2 at the lower end opening thereof is concentrically fitted in the sealing cup 2 with a predetermined flowing water interval between the sealing cup 2 and the sealing cup 2. It is inserted and arranged. The sealed water cup 2 and the sealed water cylinder 3 constitute a sealed water (trap) mechanism for preventing the backflow of malodor from the drain pipe B connected to the sewer.

  A hollow cylindrical foam stopper pipe 4 communicating with the sealing cup 2 at its lower end opening 4 a is concentrically fitted in the sealing cylinder 3 with a predetermined flowing water interval between the sealing cylinder 3 and the sealing cylinder 3. A defoaming mechanism that prevents the foaming of the drainage that is inserted and disposed from the hose joint 5 is configured.

  A top plate 6 having an elbow-like hose joint 5 for connecting a drainage hose C of a washing machine is removably inserted into the top opening of the drain trap body 1 through a top plate receiver 7. The foam-preventing pipe 4 is inserted and fitted into the lower end portion of the hose joint 5 and is supported concentrically at a fixed position.

  As shown in detail in FIG. 2, the foam-preventing pipe 4 is formed of a cylindrical hollow cylinder, and an annular step portion 4 f is formed on the inner peripheral surface thereof, and is formed on the outer peripheral surface of the hose joint 5. By engaging with the annular protrusion 5a (FIG. 1), the lower end opening of the hose joint 5 is fitted and connected in a watertight manner. In addition, the tip edge of the lower end side opening 4a of the foam stopper pipe 4 is folded outward to form an annular folded portion 4b having a semicircular cross section, and the bottom surface of the folded portion 4b includes A plurality of water guide holes 4 d are formed for guiding leakage water from the washing machine or the like flowing into the sealing cup 2 into the sealing cup 2. Further, ribs 4e for alignment and reinforcement are projected at four locations on the outer periphery of the pipe.

  As shown in detail in FIG. 3, the sealing cup 2 is formed of a bottomed cylindrical body, is located on the upper end side, and overflows the drainage that has flowed from the lower end opening 4 a of the foam stopper pipe 4. A plurality of drainage outflow slits 2a for discharging to the drain trap body 1 side are opened at a predetermined interval in the circumferential direction, and the bottom surface of the drainage outflow slit 2a is a semicircular cross-section of a concave groove. An annular groove bottom surface 2b obtained by making one rotation around the central axis z-z.

  Further, a swirl flow between the annular folded portion 4b of the foam stopper pipe 4 and the annular concave groove bottom surface 2b of the sealing water cup 2 is used to perform self-cleaning in the trap using the drained water flowing in. A generating fin 4c is provided. That is, the swirling flow generating fin 4c in the illustrated example is composed of a blade piece whose tip edge is at a height that exactly fits the bottom surface 2b of the annular groove of the sealing cup 2, as shown in detail in FIG. The blade piece is formed by standing integrally with the outer peripheral surface of the annular folded portion 4b, and is bent in a spiral shape in plan view. The spiral blade piece in plan view is directed toward the peripheral wall side of the sealing cup 2. Thus, a plurality of sheets (12 sheets in the illustrated example) are formed and arranged radially.

  The sealing cylinder 3 is a hollow cylinder whose lower end diameter is the same as that of the tip end edge of the annular folded portion 4b of the foam-preventing pipe 4, and is provided with a flange portion 3a at the upper end, via the flange portion 3a. It is fitted to the eye plate holder 7 so as to be detachable. By inserting and engaging the rib 4e protruding from the outer peripheral surface of the foam stopper pipe 4 into the lower end opening of the seal pipe 3, the seal cylinder 3 and the foam stopper pipe 4 are positioned accurately.

  When the drainage after washing flows from the drainage hose C, the drainage trap having the above configuration enters the foam stopper pipe 4 through the hose joint 5 and enters the sealed cup 2 from the lower end opening 4a of the foam stopper pipe 4. It is discharged toward. When discharged from the foam-preventing pipe 4 to the water-breaking cup 2, the drainage passes through the swirl flow generating fins 4 c disposed between the lower end opening 4 a of the foam-preventing pipe 4 and the lower bottom surface of the sealing cup 2. It is discharged to the sealed water cup 2. Therefore, swirl force is given to the drainage in the circumferential direction of the sealed water cup 2 by the action of the swirl flow generating fins 4c, and the drainage flowing into the sealed water cup 2 is an upward swirling flow rotating in the circumferential direction. Become.

  Further, the drainage flowing into the sealing cup 2 is not subjected to resistance along the curved surfaces of the annular folded portion 4b formed in the lower end opening 4a of the foam stopper pipe 4 and the annular concave groove bottom surface 2b of the sealing cup 2. Since it flows out smoothly, there is no possibility of causing energy loss such as turbulent flow when the direction of the drainage flow is reversed from the downward flow to the upward flow. For this reason, the waste water flowing into the sealed cup 2 through the swirl flow generating fins 4c becomes a high-speed upward swirl flow with little energy loss.

  The drainage that has become a high-speed upward swirling flow flows toward the drainage outflow slit 2a at the upper end of the sealed water cup while washing the inner wall surface of the sealed water cup 2 and the outer wall surface of the sealed water cylinder 3 with a powerful swirling flow. And it overflows from the drainage outflow slit 2a, flows down into the drainage trap main body 1, and is discharged to the drainage pipe A through the drainage pipe connecting portion 1a. In this way, dust, dirt, foreign matter, etc. adhering to the walls of the sealing cup 2 and the sealing cylinder 3 are scraped off by the high-speed upward swirling flow, and are discharged to the drain pipe A together with the drainage. The

  The inside of the trap with the drainage is automatically performed every time drainage flows from the drainage hose C. For this reason, dust, dirt, foreign matter, and the like do not remain attached to the trap as in the conventional drain trap, and the flow path of the drain trap does not become clogged. Moreover, since the said self-cleaning is performed whenever waste_water | drain flows in, the need for the cleaning in a drain trap becomes unnecessary, and it can be used maintenance-free over a long period of time.

  In addition, water may leak into the waterproof pan A during washing or the like, but this leaked water flows into the sealing tube 3 through the eye plate hole 6a of the eye plate 6, and the ring-back portion 4b of the anti-foaming pipe 4 The water is introduced into the sealed water cup 2 from the water guide hole 4d formed in the portion, and is caught and discharged in the flow of drainage.

  In the embodiment described above, the swirl flow generating fins 4c are integrally formed on the anti-foaming pipe 4 side, but may be integrally formed on the sealed cup 2 side. Further, the swirl flow generating fin 4c is formed as an independent single member, and is configured to be fitted between the lower end opening 4a of the foam stopper pipe 4 and the annular groove bottom surface 2b of the sealing cup 3. Also good.

  Further, the hose joint 5 and the anti-foaming pipe 4 are attached to the upper opening surface of the drain trap body 1 by the lid mechanism using the eye plate 6 and the eye plate receiver 7. It may be made to attach with other lid body mechanisms other than, and there is no restriction in the attachment means.

  Moreover, although the water pipe connection part 1a was formed in the surrounding wall part of the drain trap main body 1, and the water pipe B was pulled out horizontally horizontally, the water pipe connection part 1a was formed in the lower bottom face side of the drain trap main body 1, The water pipe B may be pulled out vertically downward.

1 shows an embodiment of a drain trap according to the present invention, wherein (a) is a longitudinal sectional view showing the entire structure of the drain trap, and (b) is a sectional view taken along line II in FIG. FIG. 2 shows the structure of the foam-preventing pipe in FIG. 1, (a) is a plan view thereof, (b) is a front view thereof, (c) is a bottom view thereof, and (d) is a longitudinal sectional view thereof. 1 shows the structure of a sealed cup in FIG. 1, wherein (a) is a plan view thereof, (b) is a front view thereof, (c) is a bottom view thereof, and (d) is a longitudinal sectional view thereof.

Explanation of symbols

A Waterproof pan B Water distribution pipe C Drain hose 1 Drain trap body 1a Drain pipe connection part 2 Sealing cup 2a Drain outflow slit 2b Annular groove bottom 3 Sealing cylinder 3a Flange part 4 Foam prevention pipe
4a Lower end opening 4b Annular turn 4c Swirling flow generating fin 4d Water guide hole 4e Rib 4f Annular step 5 Hose joint 5a Annular projection 6 Eye plate 6a Eye plate hole 7 Eye plate holder
zz Central axis of sealed cup

Claims (2)

The drainage trap body is fitted with a waterproof pan or a drainage port on the floor, and has a bottomed cup-shaped drainage trap body that is connected to a drainage pipe connection part formed at an appropriate position. Is inserted between the drain trap body with a predetermined flowing water interval, and a bottomed cylindrical sealed cup having a drain outlet slit formed on the upper end side, and the sealed cup. A hollow cylindrical sealing cylinder that is concentrically inserted with a predetermined flowing water interval and communicated with the sealing cup at the lower end opening thereof, and a predetermined flowing water interval is provided between the sealing cylinder and the sealing cylinder. A hollow cylindrical foam stopper pipe that is concentrically inserted and communicated with the sealing cup at its lower end opening is disposed, and a drain hose is provided at the tip of the upper surface opening of the drain trap body. The hose joint to be connected is detachable by a predetermined lid mechanism Together they are fitted deployed in the drainage trap top opening of the anti-foam pipe to the lower end portion of the hose joint is connected,
A plurality of swirling flow generating fins having a spiral shape in plan view are radially arranged between the lower end opening of the foam stopper pipe and the bottom surface of the sealing cup toward the peripheral wall side of the sealing cup. ,
The swirling flow generating fin gives a swirling force in the circumferential direction to the drainage passing through the fin portion so that the drainage flowing into the sealed cup from the lower end opening of the foam stopper pipe becomes an upward swirling flow. Drainage trap characterized by that.   The tip end edge of the lower end opening of the foam stopper pipe is folded outward to form an annular folded portion having a semicircular cross section, and the bottom surface of the sealed cup has a semicircular concave groove in the center of the sealed cup 2. The ring-shaped groove bottom surface obtained by making one rotation around an axis, and the swirl flow generating fin is disposed between the ring-back portion and the ring-shaped groove bottom surface. Drain trap.

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