JP5446024B2 - Rim spout structure of flush toilet - Google Patents

Description

  The present invention relates to a rim spout structure of a flush toilet, and more particularly to a rim spout structure of a flush toilet having a rim portion formed in a flush toilet body and a rim nozzle that supplies flush water to the rim portion.

  Conventionally, when rim water discharge is performed, only the rim water discharge port of the pottery can be seen on the bowl side so as not to impair the cleanability and appearance design, so a space is provided in front of the water discharge port, and the space There is known a water discharge structure in which a water discharge nozzle tip is positioned at a portion. However, since the cleaning water discharged from the nozzle is discharged from the water discharge port of the pottery while entraining the air in the space, the water discharge may become unstable or cause water splashing or abnormal noise.

  Here, Patent Document 1 discloses a flush toilet in which flush water is allowed to flow through the rim portion of the flush toilet body to wash the toilet and to allow filth to flow. According to the flush toilet disclosed in Patent Document 1, as shown in FIG. 11, a space Sc is provided on the outlet side of the washing water nozzle 100 that discharges the washing water, and the washing water is temporarily stored in the space Sc. By stagnation and applying water pressure to the ceramic water outlet 102 which is the outlet of the space Sc, 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 nozzle, air is sucked in by the ejector effect, and the cleaning 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.

  However, if the cleaning water is discharged from the nozzle at once without mixing air, the discharged cleaning water closes the water discharge port at once while hitting the inner wall near the ceramic water discharge port. At that time, a part of the discharged cleaning water is directly discharged from the pottery spout at once, and large bubbles (air) are confined in the space. The cleaning water discharged at once from the pottery spout is discharged while entraining air. Further, the interface between the large bubbles and the washing water is not stable because the surface tension is relatively small. As a result, the flow becomes unstable, and the air is discharged from the ceramic spout while entraining air.

  And when the flow rate of the cleaning water discharged from the nozzle is relatively large, the cleaning water is discharged from the ceramic water spout while entraining relatively large bubbles. There is a problem that a sound such as “pong-pong” or a bursting or mixing sound of the air is generated, or water (splash) flies at a large flow rate.

  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 turning. 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 spout structure for a flush toilet that can perform stable rim spout.

In order to achieve the above object, the present invention provides a rim spout 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 formed at the front end side of the space, and a position facing the spout of the rim nozzle in the space A shield part that is provided on an extension of the central axis of the water outlet of the rim nozzle and that collides with the cleaning water discharged from the rim nozzle, and the shield part is attached to the rim nozzle at a position facing the tip part of the rim nozzle. The cleaning water is discharged from the rim spout after colliding with the shielding part.
In the present invention configured as described above, the cleaning water discharged from the rim nozzle collides with the water outlet of the rim nozzle provided in the space formed so as to receive the cleaning water discharged from the rim nozzle. It has a shielding part, and cleaning water is discharged from a rim spout after colliding with a shielding part. In such a configuration, the washing water that collides with the shielding portion has a low flow velocity. Therefore, it is possible to prevent the cleaning water from entering the spout directly at a high flow rate, and to allow the cleaning water to stay in the space part and to push out the air in the space part slowly. The discharge of cleaning water can be stabilized while not remaining.
Moreover, since the flow rate of the washing water is small, the washing water can be prevented from being discharged while entraining air. Furthermore, it becomes easy to set the distance from the front-end | tip part of the rim nozzle of a shielding part appropriately. In addition, since it is attached to the nozzle, the structure on the toilet side made of ceramics does not have to be complicated.

In the present invention, preferably, the shielding portion is formed in a cap portion attached to the rim nozzle, and an opening portion is formed around the cap portion from which the cleaning water that collides with the shielding portion of the cap portion flows out. Yes.
In the present invention configured as described above, a shielding portion is formed in the cap portion, and an opening through which the cleaning water colliding with the shielding portion flows is formed around the cap portion. With such a configuration, since the cleaning water collides with the shielding portion and the cleaning water flows to the side from the opening formed around the cap portion, the flow rate of the cleaning water can be reduced with a simple configuration. It becomes easy to push out air in the space.

In the present invention, it is preferable that the cap portion has a base end portion and a terminal end portion constituting the shielding portion, and the opening is provided over substantially the entire circumference of the cap portion adjacent to the base end portion. In addition, a water guide passage having a predetermined length is formed between the opening and the end portion to reduce the flow rate of the cleaning water that has collided with the end portion.
In the present invention configured as above, it has a terminal portion formed as a shielding portion, an opening formed between the water conduit and the base end portion of the cap, and further collided with the terminal portion. Since the water conduit having a predetermined length for reducing the flow rate of the washing water is provided, the flow rate of the washing water can be lowered more reliably.

Moreover, in this invention, Preferably, the rectification | straightening member is attached to the opening part.
In the present invention configured as described above, the cleaning water can be made to collide with the end portion more reliably. In other words, when the rectifying member is not provided, there is a possibility that the cleaning water flows out from the opening before reaching the end portion, and air may be entrained and discharged from the ceramic water outlet, but the rectifying member is attached to the opening. By this, the rectification | straightening property of washing water is ensured and washing water can be made to collide with a termination | terminus part more reliably.

In the present invention, preferably, the rectifying member is a net attached over substantially the entire circumference of the opening.
In the present invention configured as described above, since the rectifying member is a net, the washing water can flow out from the opening of the washing water having a low flow velocity that flows backward after colliding with the terminal portion.

Further, the present invention is a rim spout 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, so as to receive flush water discharged from the rim nozzle. The formed space portion, the rim water outlet for discharging the cleaning water to the rim portion formed at the front end side of the space portion, the center of the rim nozzle water outlet at a position facing the water outlet of the rim nozzle in the space portion A shield provided on an extension line of the axis and colliding with the cleaning water discharged from the rim nozzle, and projecting from above or below at a position facing the water outlet of the rim nozzle in the space to be a shield The member is integrally molded or attached, and the cleaning water is discharged from the rim water spouting port after colliding with the shielding part .
In the present invention configured as described above, the cleaning water discharged from the rim nozzle collides with the water outlet of the rim nozzle provided in the space formed so as to receive the cleaning water discharged from the rim nozzle. It has a shielding part, and cleaning water is discharged from a rim spout after colliding with a shielding part. In such a configuration, the washing water that collides with the shielding portion has a low flow velocity. Therefore, it is possible to prevent the cleaning water from entering the spout directly at a high flow rate, and to allow the cleaning water to stay in the space part and to push out the air in the space part slowly. The discharge of cleaning water can be stabilized while not remaining.
Moreover, since the flow rate of the washing water is small, the washing water can be prevented from being discharged while entraining air. Furthermore, the shielding part can be formed with a simple configuration.

Further, the present invention is a rim spout 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, so as to receive flush water discharged from the rim nozzle. A formed space portion, a rim spout for discharging cleaning water to the rim portion formed on the front end side of the space portion, a position facing the water outlet of the rim nozzle in the space portion, and a water outlet of the rim nozzle A shielding portion that is provided on an extension line of the central axis and collides with the cleaning water discharged from the rim nozzle, and the cleaning water is discharged from the rim spout after colliding with the shielding portion, and further above the space portion. It has an air port for discharging the air staying in the space part, the cross-sectional area of the rim water spouting port is smaller than the cross-sectional area of the space part, a shielding part is formed in the space part, and the washing discharged into the space part There has been characterized in that it is adapted to the air remaining in the space as accumulated in the space is discharged from the air port.
In the present invention configured as described above, the cleaning water discharged from the rim nozzle collides with the water outlet of the rim nozzle provided in the space formed so as to receive the cleaning water discharged from the rim nozzle. It has a shielding part, and cleaning water is discharged from a rim spout after colliding with a shielding part. In such a configuration, the washing water that collides with the shielding portion has a low flow velocity. Therefore, it is possible to prevent the cleaning water from entering the spout directly at a high flow rate, and to allow the cleaning water to stay in the space part and to push out the air in the space part slowly. The discharge of cleaning water can be stabilized while not remaining. Moreover, since the flow rate of the washing water is small, the washing water can be prevented from being discharged while entraining air. Furthermore, although the wash water discharged from the rim nozzle is subjected to pressure loss at the rim spout, even in this case, since the wash water is further discharged from the rim nozzle, the air in the space portion is replaced with the wash water. It can be discharged from the port.

Moreover, in this invention, Preferably, a part of wall part which forms a space part comprises the shielding part.
In the present invention configured as described above, the shielding portion can be formed with a simple configuration.

  According to the present invention, stable rim water discharge can be performed.

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 a rim spout 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 a first embodiment of the present invention. In addition, 2nd Embodiment and 3rd Embodiment are applied to the flush toilet similar to this FIG.
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 structure of the rim nozzle and the space portion according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a cross-sectional view of the rim nozzle and the space portion shown by enlarging the portion II in FIG. 1 as viewed from above. FIG. 3 is a view of the rim nozzle and the space portion taken along line III-III in FIG. It is sectional drawing seen from the side.
As shown in FIGS. 2 and 3, the rim water spouting unit 20 includes a ceramic water spout 22, a space (ceramic 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 part S is formed so that the width | variety becomes small gradually as it goes to the pottery spout 22 at the front-end | tip in planar view. Further, as shown in FIG. 3, in the side view, the space portion S includes a portion S1 formed at a constant height and a portion S2 formed so that the height gradually decreases at the tip side. A portion S <b> 3 extending in a tubular shape toward the pottery spout 22 is formed.

Next, the structure of the rim nozzle according to the first embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 3, the rim nozzle 26 includes a nozzle main body 30, an L-shaped packing 32 for attaching the nozzle main body 30 to the rim nozzle mounting port 24, a spacer 34, and a hooked nut 36. Further, a nozzle cap 40 is attached to the tip side of the nozzle body 30.

Furthermore, the structure of the nozzle cap 40 of the rim nozzle according to the first embodiment of the present invention will be described with reference to FIG.
First, as shown in FIG. 3, the nozzle body 30 is formed with a water conduit 30a through which cleaning water passes, and the nozzle cap 40 is attached to the distal end side of the nozzle body 30 and opens to the water conduit 30a. A proximal end portion 42 is formed. Further, the nozzle cap 40 is formed with a cleaning water discharge opening 44 adjacent to the base end portion 42. The cleaning water discharge opening 44 is formed of a mesh (net) of # 20 or less, extends over substantially the entire circumference of the nozzle cap 40, and has a predetermined axial length (for example, several tens of millimeters). Further, a cap water conduit 46 is formed adjacent to the cleaning water discharge opening 44, and a terminal portion (shielding) that is closed so that the cleaning water collides with the front end side of the cap water conduit 46. Part) 48 is formed. The cap conduit 46 has an axial length L of 12 mm to 13 mm.

Next, the function and effect of the first embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic cross-sectional view of the rim nozzle and the space shown in FIG.
In the first embodiment, first, the cleaning water W1 passes through the water conduit 30a, passes through the cleaning water discharge opening 44 by the water pressure, and reaches the cap water conduit 46. The cleaning water W1 that has reached the cap water conduit 46 collides with the end portion 48. Due to this collision, the flow rate of the cleaning water W1 temporarily becomes 0 (zero), and then the flow rate of the cleaning water W1 in the direction opposite to the flow of the cleaning water W1 in the cap conduit 46 as in the cleaning water W2. It flows at a lower flow rate and is discharged into the space S through the cleaning water discharge opening 44.

Thus, according to 1st Embodiment of this invention, the washing water W1 which reached the cap water conduit 46 collides with the termination | terminus part 48, and the flow velocity becomes small. Thus, the following three effects are mainly acquired because flow velocity becomes small.
First, first, the flow rate of the cleaning water is reduced and the cleaning water flows from the cleaning water discharge opening 44 toward the side, so that the cleaning water is temporarily transferred to the space S without directing in the direction of discharging the pottery. Can be retained. Then, the air in the space portion S, in particular the space portion S3, as well as the space portions S2 and S1, can be slowly pushed out to prevent a large amount of air from staying in the space portion S. As a result, after the air is pushed out from the pottery spout 22, the wash water is discharged so as to close the pottery spout 22 with the wash water, so that the discharge of the wash water can be stabilized.
In order to reduce the flow rate of the washing water, it is preferable that the length L in the axial direction of the cap conduit 46 is 12 mm to 13 mm.

  Second, air tends to remain particularly in the space S1, but the flow rate of the cleaning water discharged from the nozzle is small, so that the air can be kept confined. That is, since the flow rate of the washing water is small, it is possible to prevent the washing water from being discharged from the ceramic water discharge port 22 while entraining a large amount of air. As a result, especially in the initial stage of cleaning with rim water discharge, for example, a “buzz” sound or a “pong-pong” sound of air bursting or mixing sound occurs, or water (splash) will fly at a large flow rate. Can be prevented. In particular, the flow rate of the cleaning water is small and effective in the spaces S1 and S2. On the other hand, in the space portion S3, since the cross-sectional area is smaller than that of the space portions S1 and S2, the flow velocity is increased, and effective rim water discharge can be performed so that cleaning water flows from the ceramic water discharge port 22 to the entire rim portion.

  Third, since the first and second actions described above can be obtained, the flow area of the cleaning water can be reduced by reducing the opening area of the water conduit 30a and the cleaning water discharge opening 44 of the nozzle body 30 as in the prior art. It is not necessary to increase the ejector effect by increasing the speed, and the opening area can be increased. As a result, the pressure loss of the washing water at the rim nozzle can be reduced.

  Next, the terminal portion (shielding portion) 48 is attached to the rim nozzle main body 48 at a position facing the opening at the front end portion of the rim nozzle main body 30, and is formed on the nozzle cap 40. Therefore, it becomes easy to appropriately set the distance of the end portion 48 from the tip portion of the nozzle body 30. In addition, since it is attached to the nozzle, the structure on the toilet side made of ceramics does not have to be complicated.

  Next, the end portion 48 is formed in the nozzle cap 40, and a cleaning water discharge opening 44 through which the cleaning water colliding with the end portion 48 of the nozzle cap 40 flows is formed around the nozzle cap 40. . As described above, the end portion 48 is formed in the nozzle cap 40, and the cleaning water discharge opening 44 through which the cleaning water colliding with the end portion 48 flows is formed around the nozzle cap 40. Accordingly, since the cleaning water collides with the terminal portion 48 and the cleaning water flows laterally from the cleaning water discharge opening 44 formed around the nozzle cap 40, the flow rate of the cleaning water can be reduced with a simple configuration. Furthermore, it becomes easy to push out the air in the space S.

  Next, the nozzle cap 40 has a base end portion 42 and a terminal end portion 48 that shields the cleaning water, and the cleaning water discharge opening 44 is adjacent to the base end portion 42 and substantially the entire nozzle cap 40. A water guide passage having a predetermined length is formed between the cleaning water discharge opening 44 and the terminal portion 48 to reduce the flow velocity of the cleaning water that has collided with the terminal portion 48. Therefore, it has a terminal portion 48 that shields the cleaning water, and a cleaning water discharge opening 44 formed between the cap water conduit 46 and the base end portion 42 of the nozzle cap 40, and further collides with the terminal portion 48. Since the cap water conduit 46 having a predetermined length for reducing the flow rate of the washed water is provided, the flow rate of the wash water can be lowered more reliably.

  Next, since the mesh (mesh) is attached to the cleaning water discharge opening 44 over almost the entire circumference, the cleaning water can be made to collide with the end portion 48 more reliably. That is, if a net is not provided, the cleaning water may flow out from the cleaning water discharge opening 44 before it reaches the end portion 48, and air may be entrained and discharged from the ceramic water discharge port 22. By attaching a net to the water discharge opening 44, it is possible to ensure the rectifying property of the cleaning water, and more reliably cause the cleaning water to collide with the end portion 48. Further, since it is a net, it collides with the end portion 48. Then, the washing water can be discharged from the washing water discharge opening 44 having a low flow velocity that flows backward. In addition, as long as the flow of cleaning water can be ensured and the cleaning water can be made to collide more reliably with the end portion, a resin or metal sheet with many small-diameter holes, porous material, etc. It may be other than a mesh. Alternatively, the nozzle cap opening may be formed integrally with a large number of small-diameter holes.

Next, the structure of the rim nozzle and the space according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a cross-sectional view of a rim nozzle and a space portion according to a second embodiment of the present invention as viewed from the side, and FIG. 6 is a cross-sectional view of the rim nozzle and the space portion according to a second embodiment of the present invention as viewed from above. It is.
As shown in FIGS. 5 and 6, the rim water spouting unit 50 includes a ceramic water spout 52, a space (ceramic water conduit) Sa, a rim nozzle mounting port 54, and a rim nozzle 56 mounted on the rim nozzle mounting port 54. A rim-side water supply channel is connected to the rim nozzle 56, and at the time of cleaning, the cleaning water is discharged from the ceramic water discharge port 52 through the rim-side water supply channel, the rim nozzle 56, and the space portion Sa in order. Yes.

The rim nozzle 56 has the same configuration as the nozzle main body 30 of the first embodiment described above, and the nozzle main body 30 extends toward the space Sa, and the water conduit 56a is the same as that of the first embodiment. (In the first embodiment, 30a) is open as it is in the space portion Sa.
A shielding member 58 is formed in the space portion Sa so as to face the rim nozzle 56. The shielding member 58 may be formed integrally with the toilet bowl using pottery, or may be made of resin or plastic and attached to the toilet bowl. As shown in FIG. 6, the shielding member 58 extends so as to close the space portion Sa in the width direction as viewed from above, and projects from the upper side to the lower side as shown in FIG. 5 when viewed from the side. A gap Sa1 through which the cleaning water passes is formed in the lower part. As shown in FIG. 7, gaps Sa <b> 2 may be formed on both sides of the shielding member 58 when viewed from above. Further, the shielding member 58 may protrude upward from below. This FIG. 7 is sectional drawing seen from the upper direction of the rim nozzle and space part by the modification of 2nd Embodiment of this invention.

Next, the function and effect of the second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a schematic cross-sectional view of the rim nozzle and the space shown in FIG.
In the second embodiment, first, the cleaning water Wa1 passes through the rim nozzle water conduit 56a and vigorously collides with the shielding member 58 with the water pressure. As a result of this collision, the flow rate of the cleaning water Wa1 temporarily becomes 0 (zero), and thereafter flows in a direction opposite to the flow of the cleaning water Wa1 and at a flow rate smaller than the flow rate of the cleaning water Wa1, as in the cleaning water Wa2. And, it is discharged to the ceramic water outlet 52 through the gap Sa1 (Sa1 and Sa2 in the modification).

As described above, according to the second embodiment of the present invention, the cleaning water Wa1 that has passed through the rim nozzle conduit 56a collides with the shielding member 58, so that the flow velocity thereof becomes small. Thus, the following three effects are mainly acquired like the 1st Embodiment mentioned above because a flow velocity becomes small.
First, since the flow rate of the cleaning water is reduced, the cleaning water can be temporarily retained in the space portion Sa. And the air of space part Sa can be extruded slowly and it can prevent that a lot of air stays in space part Sa. As a result, since the cleaning water is discharged after the air is pushed out from the pottery spout 52, the discharge of the cleaning water can be stabilized.

  Second, air tends to remain particularly in the space Sa, but the flow rate of the cleaning water discharged from the nozzle is small, so that the air can be kept confined. That is, since the flow rate of the cleaning water is small, it is possible to prevent the cleaning water from being discharged from the gap Sa1 while entraining air. As a result, it is possible to prevent the occurrence of air rupture or the like, or the flow of water (splash) at a large flow rate, particularly in the initial stage of cleaning with rim water discharge.

  Third, since the first and second actions described above are obtained, there is no need to increase the ejector effect by reducing the opening area of the rim nozzle conduit 56a to increase the flow rate of the washing water, and the opening area. As a result, the pressure loss of the washing water at the rim nozzle can be reduced.

Next, the structure of the rim nozzle and the space portion according to the third embodiment of the present invention will be described with reference to FIG. FIG. 9 is a cross-sectional view of a rim nozzle and a space according to a third embodiment of the present invention as viewed from the side.
As shown in FIG. 9, the rim water spouting unit 60 includes a ceramic water spout 62, a space (ceramic water conduit) Sb, a rim nozzle mounting port 64, and a rim nozzle 66 mounted on the rim nozzle mounting port 64. A rim-side water supply channel is connected to the rim nozzle 66, and at the time of cleaning, the cleaning water passes through the rim-side water supply channel, the rim nozzle 66, and the space Sb in this order and is discharged from the ceramic water discharge port 62. Yes.

The rim nozzle 66 has the same configuration as the nozzle main body 30 of the first embodiment described above, and extends the nozzle main body 30 toward the space Sb. The water guide channel 66a is the same as that of the first embodiment. (In the first embodiment, 30a) is open as it is in the space Sb.
A rim shielding wall portion 68 is formed in the space Sb so as to face the rim nozzle 66. As shown in FIG. 9, when viewed from the side, the rim shielding wall portion 68 extends obliquely from the upper side to the lower side, and from the lower part, the rim conduit pipe Sb1 through which the washing water passes and reaches the ceramic water outlet 62 is formed. Is formed.

Furthermore, in the third embodiment, an air port 70 is provided above the space Sb. The air port 70 is configured such that air in the space Sb passes through the hole 72, passes through the side of the pneumatic ball 74, and escapes from the hole 76 to the passage 78. When the space Sb becomes full, the ball 74 rises and closes the hole 76 to prevent the washing water from escaping to the passage 78.
In addition, you may install the shielding member 58 demonstrated in 2nd Embodiment in the space part Sb by this 3rd Embodiment.

Next, the function and effect of the third embodiment of the present invention will be described with reference to FIG. FIG. 10 is a schematic cross-sectional view of the rim nozzle and the space shown in FIG.
In the third embodiment, first, the cleaning water Wb1 passes through the rim nozzle conduit 66a and vigorously collides with the rim shielding wall portion 68 with the water pressure. Due to this collision, the flow rate of the cleaning water Wb1 temporarily becomes 0 (zero), and then flows in a direction opposite to the flow of the cleaning water Wb1 and at a lower flow rate than the flow rate of the cleaning water Wb1 as in the cleaning water Wb2. And, it is discharged to the ceramic water outlet 62 through the gap Sb1.

As described above, according to the third embodiment of the present invention, the cleaning water Wb1 that has passed through the rim nozzle water conduit 66a collides with the rim shielding wall portion 68, thereby reducing the flow velocity thereof. Thus, the following three effects are mainly acquired like the 1st Embodiment mentioned above because a flow velocity becomes small.
First, the cleaning water can be temporarily retained in the space Sb because the flow rate of the cleaning water is reduced. And the air of space part Sb can be extruded slowly and it can prevent that a lot of air stays in space part Sb. As a result, since the cleaning water is discharged after the air is pushed out from the pottery spout 62, the discharge of the cleaning water can be stabilized.

  Second, air tends to remain in the space Sb, but this air can be released to the outside through the air port 70. The operation of the air port 70 will be described later. Since the flow rate of the cleaning water discharged from the rim nozzle 66 is small even while air still remains, it is possible to prevent the cleaning water from being discharged to the rim conduit pipe Sb1 while entraining the air. As a result, it is possible to prevent the occurrence of air rupture or the like, or the flow of water (splash) at a large flow rate, particularly in the initial stage of cleaning with rim water discharge.

  Third, since the first and second actions described above are obtained, there is no need to increase the ejector effect by reducing the opening area of the rim nozzle conduit 66a to increase the flow rate of the washing water, and the opening area. As a result, the pressure loss of the washing water at the rim nozzle can be reduced.

Furthermore, the effect of the air port 70 will be described.
The cleaning water discharged from the rim nozzle 66 is subjected to pressure loss in the water discharge channel (rim water conduit) Sb1 of the ceramic water discharge port 62. Even in this case, since the cleaning water is further discharged from the rim nozzle 66, the inside of the space Sb The air (symbol Air) passes through the hole 72 and is discharged from the hole 76 and the passage 78 so as to be replaced with the cleaning water.

  When the replacement of the air in the space Sb is finished, the ball 74 provided in the middle of the flow path toward the air port 70 closes the hole 76 of the air port 70 by its buoyancy, and the washing water is not discharged from the air port 70. It is like that. For this reason, the inside of the space Sb is filled with water, and stable discharge is possible. If there is a possibility that the cleaning water may slightly flow out from the air port 70, a discharge hose may be formed by connecting a bomb hose or the like so that the cleaning water can be discharged into the bowl or tank. good.

  Next, in 3rd Embodiment, it has the air port 70 which discharges the air which was provided above the space part Sb and discharged | emitted in the space part Sb, and the cross-sectional area of the ceramic water spout 62 is from the cross-sectional area of space part Sb. A wall surface 68 serving as a shielding portion is formed in the space Sb so as to face the opening of the nozzle body, and the cleaning water discharged into the space Sb remains in the space Sb as it accumulates in the space Sb. Air is discharged from the air port. According to such a configuration, the cleaning water discharged from the rim nozzle 66 is subjected to pressure loss at the gap Sb1 and the ceramic water discharge port 62. Even in this case, since the cleaning water is further discharged from the rim nozzle 66, the inside of the space Sb The air can be discharged from the air port 70 so as to be replaced with cleaning water.

It is a top view of the flush toilet bowl by a 1st embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a rim nozzle and a space portion showing a portion II in FIG. 1 in an enlarged manner. It is sectional drawing seen from the side of the rim nozzle and space part seen along the III-III line of FIG. The state of the flow of the cleaning water is schematically shown in the sectional view of the rim nozzle and the space shown in the same manner as FIG. It is sectional drawing which looked at the rim nozzle and space part by 2nd Embodiment of this invention from the side. It is sectional drawing seen from the upper direction of the rim nozzle and space part by 2nd Embodiment of this invention. It is sectional drawing seen from the rim nozzle and space part by the modification of 2nd Embodiment of this invention. The state of the flow of the cleaning water is schematically shown in the cross-sectional view of the rim nozzle and the space portion as shown in FIG. It is sectional drawing which looked at the rim nozzle and space part by 3rd Embodiment of this invention from the side. The state of the flow of the washing water is schematically shown in the sectional view of the rim nozzle and the space portion shown in the same manner as 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 12 Rim part 20, 50, 60 Rim spout part 22, 52, 62 Ceramic spout (rim spout)
26, 56, 66 Rim nozzle 30 Nozzle body 30a Water conduit 40 Nozzle cap 42 Base end portion 44 Wash water discharge opening 46 Cap water conduit 48 Terminal portion (shielding portion)
58 shielding member 68 rim shielding wall 70 air port 72, 76 hole 74 ball 78 passage S (S1, S2, S3), Sa, Sb space (ceramic water conduit)
Sa1, Sa2 Gap Sb1 through which wash water passes Rim conduit

Claims (8)

A rim spout 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 shielding portion that is provided at a position facing the water discharge port of the rim nozzle in the space and on an extension of the central axis of the water discharge port of the rim nozzle, and that the cleaning water discharged from the rim nozzle collides with,
The shield part is attached to the rim nozzle at a position facing the tip part of the rim nozzle, and the wash water is discharged from the rim spout after colliding with the shield part. The spout structure. 2. The water washing according to claim 1 , wherein the shielding portion is formed in a cap portion attached to the rim nozzle, and an opening is formed around the cap portion through which washing water that collides with the shielding portion of the cap portion flows out. Toilet rim spout structure. The cap part has a base end part and a terminal part constituting the shielding part, and the opening part is provided over substantially the entire circumference of the cap part adjacent to the base end part. The rim spout structure of a flush toilet according to claim 2, wherein a water conduit having a predetermined length for reducing the flow rate of the washing water that has collided with the shielding part is formed between the first part and the terminal part. The rim spout structure of a flush toilet according to claim 3 , wherein a rectifying member is attached to the opening. The rim spout structure of a flush toilet according to claim 4 , wherein the rectifying member is a net attached over substantially the entire circumference of the opening. A rim spout 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 shielding portion that is provided at a position facing the water discharge port of the rim nozzle in the space and on an extension of the central axis of the water discharge port of the rim nozzle, and that the cleaning water discharged from the rim nozzle collides with,
A shielding member that protrudes from above or below and serves as the shielding portion is integrally molded or attached at a position facing the water discharge port of the rim nozzle in the space portion, and the washing water collides with the shielding portion and then the rim. The rim spout structure of a flush toilet characterized by being discharged from a spout. A rim spout 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 shielding portion that is provided at a position facing the water discharge port of the rim nozzle in the space and on an extension of the central axis of the water discharge port of the rim nozzle, and that the cleaning water discharged from the rim nozzle collides with,
Wash water is discharged from the rim spout after colliding with the shielding part,
Furthermore, it has an air port that is provided above the space portion and discharges the air retained in the space portion,
The cross-sectional area of the rim spout is smaller than the cross-sectional area of the space part, and the shielding part is formed in the space part,
A rim spout structure for a flush toilet , wherein the air remaining in the space portion is discharged from the air port as the wash water discharged in the space portion accumulates in the space portion. The rim spout structure according to claim 7, wherein a part of the wall portion forming the space portion constitutes the shielding portion.

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