JP2008303616A - Rim spout structure of water closet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rim spout structure of a water closet which is improved in silencing propery while being maintainied in predetermined ejection performance. <P>SOLUTION: The water closet has a rim 12 which is formed in a water closet body, and a rim nozzle 26 for supplying flushing water to the rim. The rim spout structure of the water closet comprises: a space S which is formed in such a shape as to receive the flushing water ejected from the rim nozzle; a rim spout 22 which is formed at the tip side of the space so as to eject the flushing water to the rim; a hole 60d which is formed at the tip side of the rim nozzle and ejects the flushing water so as to mix flushing water air through the rim nozzle with air in the space; and inner walls 33 and 44 of the space with which the flushing water ejected from the hole portion collides so that the flushing water ejected from the hole can be mixed with remaining air. The flushing water is ejected from the rim spout after colliding with the inner walls. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rim discharge port structure of a flush toilet, and more particularly to a rim discharge port structure of a flush toilet having a rim portion formed in a flush toilet body and a rim nozzle for supplying flush water to the rim portion.

  Conventionally, as in Patent Document 1, it has been known that flush water is allowed to flow through a rim portion of a flush toilet body to wash the toilet bowl and to allow filth to flow. According to the flush toilet disclosed in Patent Document 1, as shown in FIG. 9, a space S is provided on the outlet side of the washing water nozzle 100 that discharges washing water, and the washing water is temporarily stored in the space S. By stagnation and applying water pressure to the ceramic water outlet 102 which is the outlet of the space S, rectification of the cleaning water discharged from the water outlet 102 is performed. In the flush toilet described in Patent Document 1, by providing an air intake portion in front of the rim water spouting water nozzle, air is sucked in by the ejector effect, and the water containing bubbles is washed with rim water. As a result, water splash and noise are reduced.

JP 2004-156308 A

  However, in the flush toilet of Patent Document 1 described above, there is a problem that the number of parts increases and the cost increases by providing an air intake portion in front of the rim water spouting washing water nozzle. Furthermore, there is a problem that it cannot be applied to a layout in which such a fixed storage space for the air intake portion cannot be secured. Then, the present inventors repeated research in order to implement | achieve the rim water discharge which does not provide an air intake part.

  Here, as disclosed in Patent Document 1, in the case where a predetermined space (a water channel using ceramics) is provided between the nozzle tip and the rim water spouting port, it is necessary to apply a certain water pressure to the watering port of the ceramics. In other words, the rim spout water is supplied over almost the entire circumference of the rim portion of the toilet bowl by such water pressure. For this purpose, there is a demand to apply water pressure to the rim spout at an early stage while quickly filling the space with the washing water.

  However, when the water pressure is applied to the rim spout at an early stage, the following problems have occurred. That is, when the air intake portion is not provided, the air accumulated in the space and the air in the hose in front of the nozzle are drawn by the water discharge and come out from the rim water discharge port. In particular, in the initial stage of cleaning with rim water discharge, for example, a “buzz” sound or a “pompom” sound of air burst or mixing noise occurs, or water is splashed at a large flow rate. There was a problem of flying.

  If no space is provided, it is necessary to provide a resin or metal rim nozzle close to or directly at the outlet of the pottery conduit, but in this case, the nozzle has a predetermined accuracy in the direction of water discharge and swirl. Therefore, high assembly accuracy during assembly is required. Moreover, since it may be unable to maintain excrement and sewage adhesion and the hygiene of the pottery channel, it is not realistic.

  The present invention has been made to solve the above-described problems of the prior art, and an object thereof is to provide a rim discharge port structure for a flush toilet with improved silence while maintaining a predetermined water discharge performance. To do.

In order to achieve the above object, the present invention is a rim discharge port structure for a flush toilet having a rim portion formed in a flush toilet body and a rim nozzle for supplying flush water to the rim portion, and is discharged from the rim nozzle. A space formed so as to receive the cleaning water, a rim spout for discharging the cleaning water to the rim portion formed on the front end side of the space portion, a cleaning water provided on the front end side of the rim nozzle and passing through the rim nozzle; The hole for discharging cleaning water so that the air in the space is mixed, and the cleaning water discharged from the hole so that the cleaning water discharged from this hole and the residual air are mixed And an inner wall of the space portion that is configured to perform, and the wash water is discharged from the rim water spouting port after colliding with the inner wall.
In the present invention configured as described above, the cleaning water collides with the inner wall of the space portion so that the cleaning water discharged from the hole portion and the air of the space portion are mixed. Can be made fine and discharged together with cleaning water. Accordingly, it is possible to prevent the occurrence of a bursting or mixing sound of air or the occurrence of water (splash) in the case of a large flow rate. As a result, quietness can be improved while maintaining a predetermined water discharge performance.

In the present invention, it is preferable that the hole is provided with a plurality of holes having a diameter smaller than the diameter of the water passage of the rim nozzle.
In this invention comprised in this way, cleaning water and the air of the said space part can be mixed effectively, air can be refined | miniaturized and it can discharge with cleaning water.

In the present invention, it is preferable that the plurality of holes are formed in a cap attached to the tip side of the rim nozzle.
In the present invention configured as described above, the cleaning water and the air in the space can be effectively mixed with simple parts, and the air can be refined and discharged together with the cleaning water.

In the present invention, preferably, the angle of the rim nozzle and the shape of the space portion are defined so that the inner wall of the space portion exists on the extended line of the axis of the rim nozzle.
In the present invention configured as described above, the cleaning water discharged from the hole can be effectively collided with the inner wall of the space, and the air can be refined and discharged together with the cleaning water.

In the present invention, preferably, the space portion is formed so as to become smaller as the cross-sectional area of the space is closer to the rim water spouting port.
In the present invention configured as described above, the cleaning water discharged from the hole portion can easily collide with the inner wall of the space portion, and the water pressure is quickly applied to the rim outlet while the space portion is quickly filled with the cleaning water. I can do it.

In the present invention, it is preferable that the inner wall of the space portion is formed by a plurality of wall portions, the rim nozzle is attached to at least one of the plurality of wall portions, and the cleaning water discharged from the hole portion has a plurality of walls. The angle of the rim nozzle and the arrangement of the plurality of wall portions are defined so as to collide with at least one of the portions.
In the present invention configured as described above, air can be made finer and discharged together with cleaning water by a more realistic configuration, that is, a configuration in which a space portion is formed by a plurality of wall portions.

  According to the present invention, it is possible to improve the quietness while maintaining a predetermined water discharge performance.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, referring to FIG. 1, a flush toilet to which the rim discharge port structure of a flush toilet according to an embodiment of the present invention is applied will be described. FIG. 1 is a plan view of a flush toilet according to an embodiment of the present invention.
As shown in FIG. 1, the flush toilet 1 includes a valve unit 2, a rim side water supply path 4 for supplying water from the valve unit 2 to the rim side, and a tank side water supply path 8 for supplying water from the valve unit 2 to the tank 6 side. Further, the flush toilet 1 has a bowl portion 10 and a rim portion 12 formed on the main body thereof. The bowl portion 10 is formed with a jet port 14, and water is supplied from the tank 6 by an electric pump (not shown).

Next, the schematic structure of the rim discharge port will be described with reference to FIGS. 2 is a cross-sectional view of the rim discharge port shown in an enlarged view of the portion II in FIG. 1 as viewed from above, and FIG. 3 is a cross-sectional view of the rim water discharge port as viewed along line III-III in FIG. It is.
As shown in FIGS. 2 and 3, the rim discharge port 20 includes a pottery water discharge port 22, a space (pottery water conduit) S, a rim nozzle mounting port 24, and a rim nozzle 26 mounted on the rim nozzle mounting port 24. The rim-side water supply channel 4 is connected to the rim nozzle 26, and at the time of cleaning, the cleaning water is discharged from the ceramic water discharge port 22 through the rim-side water supply channel 4, the rim nozzle 26, and the space S in order. It has become.

  As shown in FIG. 2, the space S is surrounded by an outer wall portion 30, an inner wall portion 32, and a rear wall portion 34 in a plan view. The pottery spout 22 is formed by the tip of the inner wall 32 and the inner surface of the outer wall. The outer wall portion 30 has a shape curved slightly inward after extending almost straight from the connecting portion with the rear wall portion 34 toward the front. On the other hand, the entire inner wall portion 32 has a shape that protrudes toward the outer wall portion 30 and is curved. Further, the rear wall portion 34 has a sufficient width for attaching the rim nozzle 26 in a plan view. Due to the outer wall portion 30 and the inner wall portion 32 as described above, the space portion S is formed so that its width gradually decreases toward the ceramic water discharge port 22 at the tip in plan view.

  The rear wall portion 34 is formed to be inclined with respect to the outer wall portion 30 in plan view so that the rim nozzle 26 extends obliquely outward. Therefore, as indicated by a one-dot chain line A in FIG. 2, the axis of the rim nozzle 26 extends toward the outer wall portion 30. That is, in the plan view, the direction of the rim nozzle 26 is defined so that the cleaning water discharged from the rim nozzle 26 hits the outer wall portion 30. The distance along the axis A of the rim nozzle 26 from the tip of the rim nozzle 26 (the rim nozzle water guide plate 60c described later) to the outer wall portion 30 is 60 mm in this embodiment.

  Next, as shown in FIG. 3, in a side view, the space S includes a lower wall portion 40 that extends substantially flat, a first upper wall portion 42 that extends substantially flat from the rear wall portion 34 toward the front end side, and the first wall portion 42. Pottery that is surrounded by a second upper wall portion 44 (inclined surface 44) that extends obliquely downward from the tip of one upper wall portion 42, and that extends substantially straight by the tip portion of the inclined surface 44 and the lower wall portion 40. A water discharge port 22 is formed. Even in a side view, the rear wall portion 34 has a height sufficient for mounting the rim nozzle 26. Due to the lower wall portion 40, the first upper wall portion 42 and the inclined surface 44 as described above, the space portion S is formed such that its height gradually decreases toward the pottery spout 22 at the tip. The angle of the inclined surface 44 is set to 45 ° to 90 °, preferably 60 ° to 80 ° so that cleaning water discharged from the rim nozzle 26 described later collides and effectively scatters.

  In a side view, the rear wall portion 34 extends in a substantially vertical direction, and the rim nozzle 26 is attached so as to extend in the horizontal direction. In a side view, the axis of the rim nozzle 26 extends toward the inclined surface 44 as indicated by a one-dot chain line B in FIG. That is, in the side view, the direction of the rim nozzle 26 is defined so that the cleaning water discharged from the rim nozzle 26 hits the inclined surface 44. The distance along the axis B of the rim nozzle 26 from the tip of the rim nozzle 26 (the rim nozzle water guide plate 60c described later) to the inclined surface 44 is 30 mm in this embodiment. This distance is set to 10 mm to 60 mm so that water and air can be effectively mixed in the space even when the water pressure is low.

Next, the schematic structure of the rim nozzle will be described with reference to FIG. FIG. 4 is a cross-sectional view of a rim nozzle and a pottery waterway (space) S according to an embodiment of the present invention.
As shown in FIG. 4, the rim nozzle 26 is attached to the nozzle body 50, attachment members 52, 54, 56 for attaching the nozzle body 50 to the rear wall portion 34, a spacer 58, and the front end side of the nozzle body 50. The nozzle cap 60 is formed. The nozzle body 50 is formed with a water conduit 50 a through which the cleaning water passes, and the attachment members 52, 54, 56 are formed with openings 52 a, 54 a, 56 a that fit into the nozzle body 50.

  At the time of attachment, a spacer 58 is provided between the rear wall portion 34 and the flange portion of the nozzle body 50 on one side (space portion S side) of the rear wall portion 34, and then the other side of the rear wall portion 34. On the side, the attachment members 52, 54, 56 are fitted to the nozzle body 50 and the attachment member 56 is fitted into the opening of the rear wall portion 34, so that the nozzle body 50 is attached to the rear wall portion 34. ing.

  Next, the structure of the nozzle cap 60 of the rim nozzle will be described with reference to FIGS. 5 is a side view of the nozzle cap of the rim nozzle according to the embodiment of the present invention, FIG. 6 is a rear view of the nozzle cap of the rim nozzle as seen from the direction indicated by the arrow VI in FIG. 5, and FIG. FIG. 7 is a front view of a nozzle cap of a rim nozzle viewed from a direction indicated by an arrow VII in FIG. Note that the nozzle cap of the rim nozzle shown in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  First, as shown in FIG. 4, the nozzle cap 60 is formed with a water conduit 60a through which the cleaning water passes, and the inner diameter of the water conduit 60a is 17.8 mm in this embodiment. In the present embodiment, a female screw 60b having a diameter of 20 mm is formed on the proximal end side of the nozzle cap 60, that is, the attachment side to the rear wall portion 34. The female screw 60b is formed on the distal end side of the nozzle body 50. In the present embodiment, it is screwed into a male screw 50b having a diameter of 20 mm. As shown in FIGS. 5 and 6, a concave shape 60 f for preventing loosening of the screwing is formed on the base end side of the nozzle cap, that is, the attachment side to the rear wall portion 34. In this embodiment, the nozzle cap 60 has an outer diameter of 24 mm and an axial length of 25 mm.

As shown in FIG. 4, a water guide plate 60 c is formed on the tip end side of the nozzle cap 60, that is, on the space portion S side. In this embodiment, the water guide plate 60c is formed with a thickness of 3 mm. As shown in FIGS. 4 and 7, nine nozzle cap water discharge ports (holes) 60 d are formed in the water guide plate 60 c in the present embodiment. As shown in FIG. 7, in each nozzle cap water discharge port 60d, a first water discharge port 60d is formed at the center of a circular water guide plate 60c, and the remaining eight water discharge ports 60d are around the center water discharge port 60d. Is formed.
In the present embodiment, these eight nozzle cap discharge ports 60d are formed at an angle of 45 degrees with respect to each other on an arc having a diameter of 13.6 mm.

Next, as shown in FIGS. 5 and 7, a plurality of rectangular grooves 60e are formed on the surface of the water guide plate 60c on the space S side so as to connect the nozzle cap discharge ports 60d. The groove 60e extends radially from the central nozzle cap outlet 60d at an angle of 45 degrees with each other and extends through the eight nozzle cap outlets 60d. In the present embodiment, these grooves 60e have a width of 1.2 mm and a depth of 0.6 mm. These grooves 60e have an effect of discharging water adhering to the nozzle cap water discharge port 60d due to surface tension, and can prevent freezing in a cold region.
Here, the use conditions of the nozzle cap 60 will be described. When the minimum water pressure condition such as tap water introduced into the valve unit is 0.03 MPa, the cleaning flow rate discharged from nine nozzle cap outlets 60d having an inner diameter of approximately 3.5 mm is 8 L / min. By setting as described above, air can be stirred in the space.

Next, the function and effect of this embodiment will be described with reference to FIG. FIG. 8 is a schematic cross-sectional view of the rim nozzle and the pottery waterway (space) S shown in FIG.
In this embodiment, the nozzle cap water guide plate 60c is provided with a plurality of nozzle cap discharge ports 60d having relatively small holes (in the present embodiment, about φ3.5). Therefore, as schematically shown in FIG. 8, the wash water Wr1 passing through the water conduit 60a flows in a plurality of ways, and the air Air1 accumulated in the pottery water conduit (space portion) S and the rim-side water supply channel 4 However, it becomes easy to get involved in these water streams, and it becomes fine bubbles.

Here, as described above, the direction of the rim nozzle 26 is regulated so that the cleaning water discharged from the rim nozzle 26 hits the outer wall portion 30 and the inclined surface 44. Accordingly, the water flow Wr2 colliding with the outer wall portion 30 and the inclined surface 44 further stirs the air accumulated in the pottery conduit (space portion) S, and the air Air2 is made into fine bubbles as schematically shown in FIG. To come.
Then, the cleaning water Wr3 mixed with the microbubbled air is discharged to the rim portion 12 via the pottery spout 22, but the cleaning water Wr3 is mixed with the microbubbled air. It is no longer possible to generate a bursting sound or air mixing sound due to mixing of large air bubbles, or to cause water (splash) to fly due to air bursting at a large flow rate.

It is a top view of the flush toilet bowl by the embodiment of the present invention. It is sectional drawing which looked at the rim discharge port which expanded and shows the part of II of FIG. 1 from upper direction. FIG. 3 is a cross-sectional view of a rim spout seen along line III-III in FIG. 1. It is sectional drawing of the rim nozzle and earthenware water channel (space) by embodiment of this invention. The rim nozzle is a sectional view taken along line IV-IV in FIG. It is a side view of the nozzle cap of the rim nozzle by the embodiment of the present invention. FIG. 6 is a rear view of the nozzle cap of the rim nozzle as seen from the direction indicated by the arrow VI in FIG. 5. FIG. 7 is a front view of the nozzle cap of the rim nozzle as seen from the direction indicated by arrow VII in FIG. 5. FIG. 4 is a schematic cross-sectional view of the rim nozzle and the pottery conduit (space) S shown in FIG. It is sectional drawing which shows the rim water spouting structure by a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 4 Rim side water supply path 12 Rim part 20 Rim spout 22 Pottery spout 30 Outer wall part 32 Inner wall part 34 Rear wall part 40 Lower wall part 42 First upper wall part 44 Second upper wall part (inclined surface)
50 Nozzle body 60 Nozzle cap 60a Water conduit 60c Water guide plate 60d Nozzle cap water outlet 60e Groove S Space (ceramic water conduit)

Claims (6)

A rim discharge port structure of a flush toilet having a rim portion formed in a flush toilet body and a rim nozzle for supplying washing water to the rim portion,
A space formed to receive the cleaning water discharged from the rim nozzle;
A rim spout for discharging cleaning water to the rim portion formed on the front end side of the space portion,
A hole that is provided on the tip side of the rim nozzle and discharges the cleaning water so that the cleaning water passing through the rim nozzle and the air in the space are mixed;
An inner wall of the space portion that is adapted to collide with the cleaning water discharged from the hole so that the cleaning water discharged from the hole and the air of the space are mixed.
A rim discharge port structure for a flush toilet, wherein wash water is discharged from the rim water discharge port after colliding with the inner wall.   The rim discharge port structure of a flush toilet according to claim 1, wherein the hole is provided with a plurality of holes having a diameter smaller than the diameter of the water passage of the rim nozzle.   The rim discharge port structure of a flush toilet according to claim 2, wherein the plurality of holes are formed in a cap attached to a tip side of the rim nozzle.   The rim of a flush toilet according to any one of claims 1 to 3, wherein an angle of the rim nozzle and a shape of the space portion are defined so that an inner wall of the space portion exists on an extension line of the axis of the rim nozzle. Discharge port structure.   The rim discharge port structure of a flush toilet according to any one of claims 1 to 4, wherein the space portion is formed so that a cross-sectional area of the space becomes smaller as it approaches the rim water discharge port. The inner wall of the space portion is formed of a plurality of wall portions,
The rim nozzle is attached to at least one of the plurality of wall portions, and the angle of the rim nozzle and the plurality of the plurality of rim nozzles so that cleaning water discharged from the hole collides with at least one of the plurality of wall portions. The rim discharge port structure of a flush toilet according to any one of claims 1 to 5, wherein the arrangement of the wall portion is defined.

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