JP2845351B2 - Flush toilet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet, and more particularly to a flush toilet capable of efficiently generating a siphon action in a trap drain.

[0002]

2. Description of the Related Art In a flush toilet which uses a siphon action to flush a toilet, a drainage channel is once guided to an upper top from an upstream side of a lower portion of a bowl portion, and then drained to a lower downstream side. It has a trap drainage channel. Conventionally, a configuration in which a step portion is provided on the inner wall of the trap drainage channel to promote the siphon action is disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-21180.

FIG. 4 is an enlarged sectional view of a main part of a conventional flush toilet disclosed in Japanese Utility Model Laid-Open No. 62-21180.
In this conventional flush toilet 100, a tongue piece (step portion) 104 is formed by projecting a tongue piece (step portion) 104 on a wall near an upstream riser 103 in a downcomer 102 downstream from a top 101 to form a trap drainage channel 105. I have. When the flush water is supplied to the toilet, the flush water that has passed through the top of the trap drainage channel is flushed with the tongue 104
First, a water film is generated near the drain port to prevent outside air from entering the trap drain channel 105. Next, the air in the trap drainage channel 105 is discharged together with the washing water, and a negative pressure is generated in the trap drainage channel 105 to generate a siphon action.

[0004]

However, in such a conventional flush-type toilet, the flow path is the trap drainage channel 10.
5 was an elbow with a very small radius of curvature, with the inside of the bend being bent almost vertically at the top 101. for that reason,
From the entrance of the trap drain 105 to the trap drain 105
The washing water flowing toward the top 101 of the trap water is separated from the inner wall near the top 101 by the inertia when flowing through the top 101 of the trap drain 105, flows outward, and is opposite to the entrance of the trap drain. Collides with the side wall.
The colliding washing water flows along the side wall opposite to the entrance of the trap drainage channel as it is, and flows down without colliding with the tongue piece 104. Therefore, the siphon effect was hardly generated. Further, in the separation layer between the inner wall surface and the cleaning water caused by the separation of the cleaning water, even if the siphon action occurs and the air is expelled, a part of the cleaning water is swirled there, As a result, the flow path was narrowed, and the flow rate of wash water that could be discharged was limited. For this reason, filth (especially heavy filth) may not be discharged in a short time.

On the other hand, it is conceivable that the amount of water stored in the bowl portion is increased and the waste is reliably discharged by maintaining the imperfect but long siphon phenomenon. However, the valve tub must be enlarged. It is not preferable from the viewpoint of water saving. An object of the present invention is to provide a flush toilet that solves such a problem.

[0006]

In order to solve the above-mentioned problems, a flush toilet according to the present invention comprises a rising pipe section and a continuous
And a trap drainage channel consisting of a substantially straight tubular downcomer
Flush toilet, wherein the radius of curvature inside the top of the trap drainage channel is at least 45 mm, and the trap
Flow along the inner wall on the inner wall opposite to the inlet of the drainage channel.
A step is provided for the falling washing water to collide .

[0007]

According to the flush toilet of the present invention, the radius of curvature inside the top of the trap drainage channel is set to at least 45 mm. A sufficient flow path can be obtained without peeling from the substrate, and a large flow rate can be flowed in a short time. In addition, the downcomer
Flow along the inner wall on the inner wall opposite to the inlet of the drainage channel.
Since the step portion with which the falling washing water collides is provided , the siphon action can be generated in a short time, and therefore, heavy dirt which has been difficult in the past can be discharged in a short time .

[0008]

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a vertical sectional view of a flush toilet according to a first embodiment of the present invention. The flush toilet 1 has a bowl portion 3 partitioned by a partition wall 2 and a trap drainage channel 4. Trap drainage channel 4
Is the inflow port 5 opened at the lower part of the rear wall of the bowl section 3 and this
A rising pipe portion 5a extending obliquely rearward and upward from the inflow port 5,
An inverted U-shaped top 4a connected to the rising pipe 5a;
A substantially straight tubular downcomer 4b extending downward from the top 4a
Consists of The top portion 4a is 45 mm or more at the location where the radius of curvature is the smallest inside. Downcomer unit 4b, a throttle portion 4c forming a stepped portion reduced in diameter in a direction perpendicular to the wall of the downcomer portion 4b of the inner diameter of the downcomer portion 4b at the lower end, the inlet 5
In step portion provided in the side wall 4d where an inner wall of the opposite side of the
And a plurality of protrusion structures 4e .

[0009] With such a structure, the flush water that has passed through the top 4a of the trap drainage channel 4 when the toilet flushing is started, has an inner wall surface near the top 4a because the radius of curvature of the top 4a is 45 mm or more. It flows down the side wall 4d 'along the inner wall surface without being peeled off. The washing water that has flowed down collides with the throttle portion 4c or the projection structure 4e and scatters, and generates a water film on the outlet side in the trap drainage channel 4. With the generation of the water film, the air in the trap drainage channel 4 is discharged to the outside of the trap drainage channel 4 together with the washing water, and the siphon action is quickly generated in the trap drainage channel 4 with a small amount of washing water.
Note that the projection structures 4e are not limited to two stages, and may be provided at appropriate stages. At this time, the inside of the trap drainage channel 4 has a strong negative pressure, and the washing water flows in the trap drainage channel 4 vigorously.
The radius of curvature of the top 4a of the trap drainage channel 4 is 45 mm or more
Is therefore, cleaning water is prevented from peeling off from the inner wall surface near the top 4a is. Therefore, a large flow of washing water is supplied to the outlet 6.
, And the washing water and filth in the bowl portion 3 can be discharged in a short time.

This is demonstrated by the following measurement results. That is, using a toilet having the same shape, providing a step portion having the same shape (the shape shown in this embodiment) in the trap drainage channel, and in a place where the radius of curvature is the smallest inside the top of the trap drainage channel as in the related art. A trap drain with a small radius of curvature of about 10 mm and a top 4a as shown in this embodiment.
With the trap drain having a large radius of curvature of about 50 mm at the place where the radius of curvature is the smallest, water is stored in the toilet bowl portion, water is supplied to the bowl portion at 20 liters / minute, and the water flows through the trap drain channel. As a result of measuring and comparing the flow rates of the washing water, the maximum value of the flow rate in the siphon state is 125 liters / min for the trap drainage channel with a small radius of curvature, and 175 liters / min for the trap drainage channel with a large radius of curvature.
And the latter showed 1.4 times the value of the former.

FIGS. 2 and 3 show another embodiment relating to the stepped shape of the inner wall of the trap drainage channel, and the operation state of the washing water is the same as that of the first embodiment. FIG. 2 is a vertical sectional view of a flush toilet according to a second embodiment of the present invention. Here, the same reference numerals are given to the same parts as in the first embodiment,
The description is omitted. In this embodiment, the downcomer 4b extending from the top 4a of the trap drain 4 to the outlet 6 is formed in a substantially straight tubular shape.
A horizontal portion 4f to be a step is formed at a required height position of the side wall 4d on the opposite side, and a step is provided at the outlet 6 to form a throttle 4c. Also in this second embodiment, the radius of curvature inside the top 4a of the trap drainage channel 4 is 45 mm or more at the smallest location, as in the first embodiment.

FIG. 3 is a vertical sectional view of a flush toilet according to a third embodiment of the present invention. Here, the first embodiment and the second embodiment
The same parts as those of the embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the downcomer of the trap drain 4
The inner wall parts 4b stepped portion and becomes large number of projections 4g ... provided.
In the third embodiment, it provided over the one obtained by one round at a predetermined interval protrusions 4g ... circumferentially in the inner wall in three stages by shifting the phase. The projections 4g may be provided not only in three stages but also in multiple stages. Also in this third embodiment, the radius of curvature inside the top 4a of the trap drainage channel 4 is 45 mm or more at the smallest place, as in the first embodiment.

[0013]

According to the flush toilet of the present invention, a step portion is provided on the inner wall of the downcomer portion of the trap drainage channel, and the radius of curvature of the top portion is made 45 mm or more.
The flowing water that has passed over the top of the tube does not peel off from the inner wall surface and falls almost uniformly over the entire circumference of the tube wall, and in combination with the step, generates a stable water film to generate a complete siphon action. Therefore, a large amount of wastewater can be obtained at the time of siphon generation, so that it is possible to completely discharge wastes in a short time and to save water .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a flush toilet according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a flush toilet according to a second embodiment of the present invention.

FIG. 3 is a vertical sectional view of a flush toilet according to a third embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part of a conventional flush toilet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rinse toilet 2 Partition wall 3 Bowl part 4 Trap drainage channel 4a Top part 4b Downcomer part 4c Narrow part 4d Inner wall ( side wall ) 4d 'Side wall 4e Step part ( projection structure ) 4f step part ( horizontal part ) 4g step part ( projection ) 5 Inlet 5a Ascending pipe 6 Outlet

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shinji Shibata 2-8-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kikai Co., Ltd. Chigasaki Plant (72) Inventor Noboru Niihara 2-chome, Motomura, Chigasaki-shi, Kanagawa Prefecture No. 1 Totoki Kikai Co., Ltd. Chigasaki Plant (72) Inventor Takayuki Otani 2-8-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Totoki Kikai Co., Ltd. Chigasaki Plant (56) References Real Opening Sho57-38874 (JP, U) Hikaru 2-50478 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 11/02 E03D 11/18

Claims (1)

(57) [Claims] 1. An ascending pipe part and a substantially straight tubular part continuous therewith.
A flush toilet with a trap drainage channel consisting of a downcomer
A is the inner radius of curvature of the top portion of the trap drainage
Trap drainage of the downcomer section at least 45 mm
Flows down along the inner wall on the inner wall opposite to the inlet of the road
A flush toilet characterized by having a step portion against which flush water collides .