JP6987353B2 - Drainage socket, flush toilet - Google Patents

Description

The present invention relates to a drainage socket that connects a trap outlet of the toilet bowl body and a building pipe to discharge filth in the bowl portion of the toilet bowl body.

Conventionally, as a drainage socket for connecting the drainage channel of the toilet bowl body of the flush toilet and the underfloor drainage pipe, the connection pipe member on the toilet bowl body side connected to the outlet portion of the drainage channel of the toilet bowl body and the inlet portion of the underfloor drainage pipe are connected. A drainage socket having an underfloor side connecting pipe member provided with a bent pipe line and an intermediate pipe member extending substantially linearly connecting the toilet bowl main body side connecting pipe member and the underfloor side connecting pipe member is known (for example). , Patent Document 1).

In such a drainage socket, when the filth in the bowl part of the toilet bowl is discharged from the toilet bowl body, first, a part of the washing water (preceding washing water) stored in the bowl part precedes the filth and drains the drainage socket. It flows inside and is discharged to the building piping.
After that, the washing water (backpack water) that transports the filth by flowing after the filth flows in the drainage socket, and the filth is discharged to the building piping together with the backpack water.

Japanese Unexamined Patent Publication No. 2011-179187

When the wash water is saved, the total amount of wash water for transporting filth is reduced.
That is, the amount of washing water (backpack water) for transporting the filth by flowing after the filth is also reduced.
Under such circumstances, when the filth discharged from the drainage socket to the building pipe reaches the horizontal part of the building pipe, the amount of water carried on the back is small and the distance that the filth can be transported is shortened. There is room for further improvement in the filth transport capacity.

Therefore, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to reduce the amount of water carried on the back even when the amount of washing water is reduced due to water saving. It is to provide drainage sockets and flush toilets that can increase and reliably transport filth.

The invention according to claim 1 is a drainage socket for connecting a trap outlet of a toilet bowl body and a building pipe, and a relatively large amount of the cleaning water containing filth supplied from the trap outlet of the toilet bowl body is used. A diversion means for dividing the first washing water to the second washing water containing the first washing water and the second washing water containing relatively less filth than the first washing water, and the first washing water and the second washing. Of the merging means for merging water at the merging portion, the first washing water and the second washing water separated at the same timing by the dividing means, the second washing water is the first. The above-mentioned problem is solved by providing a merging timing adjusting means for adjusting to reach the merging portion later than the washing water of the above.

According to the drainage socket of the invention according to claim 1 configured in this way, the washing water containing filth supplied from the trap outlet of the toilet body is the first washing water containing a relatively large amount of filth and the first washing water. A diversion means for shunting into a second lavage water containing relatively less filth than the lavage water of 1, a merging means for merging the first lavage water and the second lavage water at a merging portion, and shunting. Of the first wash water and the second wash water separated at the same timing by the means, the merging timing adjustment is adjusted so that the second wash water arrives at the merging portion later than the first wash water. By providing the means, the second wash water having a relatively small amount of filth separated at the same timing as the first wash water having a relatively large amount of filth by the divergence means can be compared with the first wash water. Also delay and join.
That is, since the pre-washing water that precedes the filth can be delayed and merged with the backpack water that follows the filth, the pre-washing water can be used for sewage transportation, and both water saving and high sewage transportation performance can be achieved at the same time.

In the invention according to claim 2, in addition to the configuration of the drainage socket according to claim 1, the washing water and the filth flowing from the trap outlet of the toilet bowl body to the building pipe to carry the filth flow. It is provided with a main flow path, a branch flow path that branches from the main flow path and rejoins the main flow path, and a sewage ingress suppressing means for suppressing the ingress of the filth into the branch flow path, and the sewage flow means discharges the filth. At least a part of the preceding wash water that precedes the filth is diverted from the main flow path to the branch flow path, and the merging timing adjusting means is used from the trap outlet of the toilet body to the building pipe. The above-mentioned problem is solved by the fact that the sub-flow path has a longer flow path length than the main flow path, which communicates with the main flow path and passes through the branch flow path on the way.

According to the drainage socket of the invention according to claim 2 configured in this way, in addition to the effect of the invention according to claim 1, the flow path length of the sub-flow path is longer than the flow path length of the main flow path. Since the shunt wash water that has flowed into the sub-flow passage passes through the shunt flow path, which is longer than the filth that passes through the main flow path, the timing of merging into the main flow path of the shunt flow wash water is adjusted, and the side flow The diversion washing water that has flowed into the road is converted into backpack water, which can improve the transport performance of filth.
In addition, the branch channel is a means for converting the preceding wash water into backwash water, and if filth enters the branch channel, the merging timing of the filth will be adjusted, so the advance wash water will be converted to backwash water. Can not.
Therefore, by forming a filth invasion suppressing means for suppressing the ingress of filth into the shunt channel, the invasion of sewage into the shunt channel is surely suppressed, so that the amount of water carried on the back can be surely increased. can.

In the invention according to claim 3, in addition to the configuration of the drainage socket according to claim 2, the inlet of the branch flow path communicating with the main flow path is the main flow from the outlet of the branch flow path communicating with the main flow path. By arranging it on the downstream side of the road, it solves the above-mentioned problems.

According to the drainage socket of the invention according to claim 3 configured in this way, in addition to the effect of the invention according to claim 2, the inlet of the branch flow path communicating with the main flow path is the branch flow path communicating with the main flow path. Since it is located on the downstream side of the main flow path from the outlet, when at least a part of the preceding wash water flows into the sub-flow path, the branch wash water returns to the upstream by the length of the branch flow path, while the filth is mainstream. Since the water flows toward the downstream side of the road, the distance between the diversion wash water and the filth can be increased, and the preceding wash water can be more reliably diverted to the backwash water.

In the invention according to claim 4, in addition to the configuration of the drainage socket according to claim 2, the inlet of the branch flow path communicating with the main flow path is the main flow from the outlet of the branch flow path communicating with the main flow path. By arranging it on the upstream side of the road, it solves the above-mentioned problems.

According to the drainage socket of the invention according to claim 4 configured in this way, in addition to the effect of the invention according to claim 2, the inlet of the branch flow path communicating with the main flow path is the branch flow path communicating with the main flow path. Since it is located on the upstream side of the main flow path from the outlet, the flow path resistance when the wash water flowing through the main flow path flows into the sub flow path is reduced, and the diversion wash water at the time of inflow to the sub flow path is reduced. Since the flow velocity is maintained at the flow velocity of the preceding wash water immediately before the inflow to the subchannel, the branch channel can be formed longer.

In the invention according to claim 5, in addition to the configuration of the drainage socket according to any one of claims 2 to 4, the main flow path is formed of a pipe member, and the branch flow path is the main flow. By arranging it on the side of the pipe member forming the road, the above-mentioned problems are solved.

In order to increase the amount of water carried on the back, it is sufficient to secure a long flow path.
Generally, the drainage socket is installed at the bottom of the flush toilet, but in the height direction, it interferes with the bowl and trap of the flush toilet, so the length of the branch channel is set in the height direction. It is difficult to secure.
And, on the side of the drainage socket, there is only the hem of the flush toilet, and the distance between the drain socket and the skirt of the flush urinal is the bowl and trap of the drain socket and the flush urinal. Greater than the distance between, there was a dead space on the side of the drain socket.
Therefore, according to the drainage socket of the invention according to claim 5 configured as described above, in addition to the effect of the invention according to any one of claims 2 to 4, the branch flow path forms the main flow path. Since it is arranged on the side of the pipe member to be used, the side space of the main flow path having a relatively large gap with the flush toilet can be utilized, so that the branch flow path can be formed longer.

In the invention according to claim 6, in addition to the configuration of the drainage socket according to any one of claims 2 to 5, the inlet of the branch flow path opens toward the upstream side of the main flow path. By doing so, the above-mentioned problems are solved.

According to the drainage socket of the invention according to claim 6 configured in this way, in addition to the effect of the invention according to any one of claims 2 to 5, the inlet of the branch flow path is upstream of the main flow path. By opening toward the side, the inlet of the branch channel opens in the flow direction of the preceding wash water, so that more of the preceding wash water can be taken into the branch channel and the amount of backwash water can be increased. can.

In the invention according to claim 7, in addition to the configuration of the drainage socket according to any one of claims 2 to 6, the direction in which the inlet of the branch flow path is orthogonal to the flow direction of the preceding wash water. By opening toward the above-mentioned problem, the above-mentioned problem is solved.

Generally, water has a velocity gradient with the bottom surface of the flow path due to its own viscosity.
Due to this velocity gradient, water has the property of diffusing in directions other than the flow direction.
Therefore, according to the drainage socket of the invention according to claim 7 configured as described above, in addition to the effect of the invention according to any one of claims 2 to 6, the inlet of the branch channel precedes. By opening in the direction orthogonal to the flow direction of the wash water, the preceding wash water diffuses in the main flow path and reaches the inlet of the branch flow path, while the filth is the wash water due to its own inertial force. Since the main flow path is moved along the flow, it is possible to prevent the ingress of filth into the branch flow path by a simple method.

In the invention according to claim 8, in addition to the configuration of the drainage socket according to any one of claims 2 to 7, the diversion means is a guide for deflecting the washing water by the Coanda effect. This solves the above-mentioned problems.

According to the drainage socket of the invention according to claim 8 configured in this way, in addition to the effect achieved by the invention according to any one of claims 2 to 7, the diversion means uses the coranda effect to clean the washing water. By being a deflecting guide, only the wash water is attracted to the guide, so that at least a part of the preceding wash water can be more efficiently guided to the branch flow path.

In the invention according to claim 9, in addition to the configuration of the drainage socket according to any one of claims 2 to 8, the height of the lower end of the inlet of the branch channel is the height of the outlet of the branch channel. The above-mentioned problem is solved by the fact that the height is equal to or higher than the height of the lower end and the inside of the branch flow path is formed by a downward slope or a horizontal bottom surface.

If there is an upslope inside the shunt channel, the shunt wash water may not be able to pass through the upslope.
Therefore, according to the drainage socket of the invention according to claim 9 configured as described above, in addition to the effect of the invention according to any one of claims 2 to 8, the lower end of the inlet of the branch channel Since the height is equal to or higher than the height of the lower end of the outlet of the shunt channel and the inside of the shunt channel is formed by a downward slope or a horizontal bottom surface, there is no ascending slope in the shunt flow path. No downwardly convex part is formed inside, and all the water that has entered the branch flow path from the inlet can be transmitted to the outlet.

In the invention according to claim 10, in addition to the configuration of the drainage socket according to any one of claims 1 to 9, the merging timing adjusting means provides a deceleration means for decelerating the diversion washing water. By having it in the branch flow path, the above-mentioned problems are solved.

According to the drainage socket of the invention according to claim 10 configured in this way, in addition to the effect of the invention according to any one of claims 1 to 9, the merging timing adjusting means provides the split washing water. By having a deceleration means for decelerating in the shunt flow path, the shunt flow washing water is decelerated in the shunt flow path, and the timing at which the shunt flow wash water returns to the main flow path is delayed. Can be converted.

The invention according to claim 11 solves the above-mentioned problem by providing the drainage socket according to any one of claims 1 to 10.

According to the present invention, at least a part of the preceding wash water can be turned upstream from the filth and converted into backpack water to improve the filth transport performance.

A side sectional view of a flush toilet provided with a drainage socket according to the first embodiment of the present invention. A partial cross-sectional perspective view of a drainage socket according to the first embodiment of the present invention. FIG. 1 is a cross-sectional view taken along the line III-III of FIG. The figure which shows the state of the flow of the washing water in the drainage socket which is 1st Embodiment of this invention. The schematic diagram which shows the flow path length in the drainage socket which is 1st Embodiment of this invention. A partial cross-sectional perspective view of a drainage socket according to a second embodiment of the present invention. An enlarged plan sectional view of a main part of a drainage socket according to a second embodiment of the present invention. The schematic diagram which shows the flow path length in the drainage socket which is the 2nd Embodiment of this invention.

<1. First Embodiment>
The drainage socket 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

<1.1. Structure of flush toilet>
First, the structure of the flush toilet bowl including the drainage socket 100 and the drainage socket 100, which is the first embodiment of the present invention, will be described with reference to FIGS. 1 to 3.
FIG. 1 is a side sectional view of a water-washing toilet device provided with a drainage socket according to the first embodiment of the present invention, and FIG. 2 is a partial cross-sectional perspective view of the drainage socket according to the first embodiment of the present invention. FIG. 3 is a sectional view taken along line III-III of FIG.
The longitudinal direction of the drainage socket 100 is defined as the "front-back direction", and the direction orthogonal to the plane formed by the front-back direction and the vertical direction (that is, the width direction of the drainage socket 100) is defined as the "left-right direction".

As shown in FIG. 1, the flush toilet FT includes a toilet body T and a drainage socket 100 connected to the toilet body T.
The toilet body T has a bowl portion Tb on which filth is accumulated and a trap portion Tt that communicates with the bowl portion Tb at the bottom of the bowl portion Tb.
The outlet (trap outlet) To of the trap portion Tt is open toward the floor F (that is, vertically downward).

The trap outlet To and one end of the drainage socket 100 communicate with each other, and the other end of the drainage socket 100 is connected to the building pipe P provided on the floor F.

<1.2. Drainage socket structure>
As shown in FIG. 2, the drainage socket 100 is composed of three members: an inlet side bent pipe member 110, a parallel pipe member 120, and an outlet side bent pipe member 130.
The main flow path MS is a flow path connecting the inlet of the inlet-side bending pipe member 110 (that is, the trap outlet To) to the socket outlet 133 of the outlet-side bending pipe member 130.
The filth in the bowl portion Tb of the toilet bowl body T passes through this main flow path MS.
The "dirt" in the present invention is, for example, a single paper shown in JIS P 4501: 2006 (toilet paper) or an equivalent toilet paper-90 cm folded in eight to form a substantially square stack of four sheets. Point to.

As shown in FIGS. 1 and 2, the inlet-side bending pipe member 110 is a tubular member having a substantially L-shape in a side view.
The direction of the washing water flowing from the trap outlet To of the toilet body T in order for the inlet-side bending pipe member 110 to discharge the washing water flowing from the trap outlet To of the toilet body T to the building pipe P provided on the floor F. Is a member that deflects from the vertical direction to the horizontal direction.
Then, the inlet-side bent pipe member 110 is directly connected to the vertical pipe line region 111 opening toward the trap outlet To of the toilet body T and the vertical pipe line region 111 to deflect the vertical flow in the horizontal direction. It is partitioned from the bending region 112.

As shown in FIGS. 1 to 3, the parallel pipe member 120 is an elliptical pipe extending in the horizontal direction, and connects the inlet side bent pipe member 110 and the outlet side bent pipe member 130 described later.

As shown in FIGS. 1 and 2, the outlet-side bent pipe member 130 has a substantially U-shape in a plan view, and the washing water W flowing in from the parallel pipe member 120 is discharged to the building pipe P provided on the floor F. This is a member that deflects the direction of the flow of the washing water W flowing from the parallel pipe member 120 from the horizontal direction to the vertical direction.

<1.3. Detailed structure of the exit side bending pipe member>
Subsequently, the detailed structure of the outlet-side bent pipe member 130 will be described.
As shown in FIG. 3, in the outlet-side bent pipe member 130, the lateral expansion portion 132 is formed symmetrically with respect to the AA line passing through the center of the inlet portion 131 connected to the parallel pipe member 120. There is.

In the vicinity of the inlet portion 131, a socket outlet 133 communicating with the building pipe P is opened vertically downward.
Further, the center of the socket outlet 133 in the left-right direction is also arranged on the AA line.

The lateral expansion portions 132 are arranged on the left and right sides of the entrance portion 131.
On the side of the drainage socket, there is only the hakama part of the flush toilet, and the distance between the drain socket and the hakama part of the flush toilet is between the drain socket and the bowl part or trap part of the flush toilet. It is larger than the distance of the toilet and was conventionally regarded as a dead space.
Therefore, in this embodiment, paying attention to this dead space, the side expansion portion 132 is arranged on the outlet side bending pipe member 130.

The lateral expansion portion 132 extends in the front-rear direction substantially parallel to the horizontal pipe member 120, and the length in the front-rear direction is longer than the length in the vertical direction of the side expansion portion 132.
The bottom surface of the lateral expansion portion 132 is inclined downward toward the rear end portion.

Further, a communication passage 132a communicating with the parallel pipe member 120 is formed on the rear end side of the lateral expansion portion 132.
The bottom surface of the communication passage 132a is inclined downward toward the parallel pipe member 120.

Guides 134 are formed on the left and right sides of the socket outlet 133, respectively.
The guide 134 is generally wedge-shaped in a plan view and tapers toward the front.
Further, the left and right side surfaces of the guide 134 are curved in the left-right direction and bulge outward.

A plate-shaped protrusion 135 is formed in front of the socket outlet 133.
The center of the protrusion 135 in the left-right direction is also arranged on the AA line.
That is, the center in the left-right direction of the inlet portion 131, the center in the left-right direction of the socket outlet 133, and the center in the left-right direction of the protrusion 135 exist on the same straight line (A-A line).

<1.4. Behavior of wash water>
Next, the behavior of the washing water in the drainage socket 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 4.
FIG. 4 is a diagram showing the flow of washing water in the drainage socket 100 according to the first embodiment of the present invention.
Since the drainage socket 100 is symmetrical with respect to the center line AA in the left-right direction, only one side (right side) shows a streamline.

<1.4.1. Behavior of pre-wash water>
First, the behavior of the preceding wash water will be described.
As shown in FIGS. 1 and 4, the washing water Wc flowing into the vicinity of the center (A-A line) of the outlet-side bent pipe member 130 moves straight through the parallel pipe member 120 and then collides with the protruding portion 135. The direction is reversed and it falls toward the socket outlet 133.

Next, the behavior of the washing water Wo flowing through the position farthest from the vicinity of the center (A-A line) of the outlet-side bending pipe member 130 (in other words, the position closest to the guide 134) will be described.
As shown in FIG. 4, the washing water Wo is attracted to the guide 134 by the Coanda effect, and the direction of the flow is deflected toward the guide 134 and flows to the lateral expansion portion 132.

Next, about the behavior of the washing water W1 flowing between the washing water Wo flowing at the position farthest from the center (AA line) of the outlet side bending pipe member 130 and the washing water Wc flowing near the AA line. explain.
The wash water W1 is also deflected by the guide 134 in response to the curvature of the surface of the guide 134, jumps over the socket outlet 133, and flows to the lateral expansion portion 132.
At this time, when passing over the socket outlet 133, some of the washing water falls to the socket outlet 133 due to gravity.

As described above, the pre-washing water partially flows toward the socket outlet 133, and after being deflected toward the guide 134, it is a lateral expansion portion from between the guide 134 and the projecting portion 135 as a diversion washing water. It is roughly divided into those that are divided into 132.
Here, the surface connecting the tip of the guide 134 and the tip of the protrusion 135 becomes the entrance (side expansion portion entrance) 132b of the side expansion portion 132.

Then, the washing water flowing into the side expansion portion 132 from the side expansion portion inlet 132a flows toward the rear end portion due to the downward inclination of the bottom surface of the side expansion portion 132.

<1.4.2. Behavior of wash water containing filth>
Subsequently, the behavior of the washing water containing the filth E will be described.
As shown in FIGS. 1 and 4, the washing water Wc containing the filth E that has flowed into the vicinity of the center (A-A line) of the outlet-side bent pipe member 130 has its movement direction reversed due to the collision with the protrusion 135. It falls toward the socket outlet 133.
Next, the washing water W1 flowing between the washing water Wo flowing at the position farthest from the center (AA line) of the outlet side bending pipe member 130 and the washing water Wc flowing near the AA line is preceded. The behavior is the same as that of the washing water, and a part of the washing water flows into the lateral expansion portion 132 as a diversion washing water.
The behavior of the diversion wash water flowing into the lateral expansion portion 132 is the same as the behavior of the preceding wash water.

At the timing when the filth E reaches the downstream side of the communication passage 132a, the diversion washing water flows out from the communication passage 132a provided on the rear end side to the parallel pipe member 120.
That is, the lateral expansion portion 132 forms a branch flow path DS that branches from the main flow path MS and then rejoins the main flow path MS.

<1.4.3. Behavior of backpack water>
Next, the behavior of the backpack water flowing after the filth E (particularly the backpack water supplied from the toilet bowl body) will be described.
Washing water Wc that has flowed into the vicinity of the center (A-A line) of the outlet-side bending pipe member 130, and cleaning water Wo and A-A that flow at the position farthest from the vicinity of the center (AA line) of the outlet-side bending pipe member 130. The behavior is the same as that of the washing water W1 flowing between the washing water Wc flowing near the line and the preceding washing water, and a part of the washing water flows into the side expansion portion 132 as the diversion washing water.
The behavior of the diversion wash water flowing into the lateral expansion portion 132 is the same as the behavior of the preceding wash water.

<1.5. Function of each part>
The first wash water containing a relatively large amount of dirt that directly falls to the socket outlet 133 by passing through the socket outlet 133 and the first wash water that flows into the lateral expansion portion 132 are relatively more dirty than the first wash water. Divided into less second wash water.
In other words, by passing through the socket outlet 133, the washing water is divided into the washing water flowing out to the socket outlet 133 and the diversion washing water flowing to the side expansion portion 132.
Therefore, the socket outlet 133 functions as the diversion means D.

Further, the guide 134 deflects the washing water and guides it to the lateral expansion portion 132.
Therefore, the guide 134 also functions as the diversion means D.

Further, the second wash water containing relatively less filth than the first wash water merges with the first wash water containing a relatively large amount of filth flowing through the main flow path MS through the communication passage 132a. ..
Therefore, the communication passage 132a functions as the merging means C.
Further, the end of the communication passage 132a is the confluence portion J.

Here, the flow path length will be described with reference to FIG. 5, which is a schematic diagram showing the flow path length in the drainage socket 100 according to the first embodiment of the present invention.
As shown in FIG. 5, the flow path length LM of the main flow path MS is the distance L1 from the trap outlet To of the toilet bowl body T to the confluence J with the communication passage 132a and the socket outlet from the confluence J with the communication passage 132a. It is represented by the sum of the distance to 133 and L2 (that is, LM = L1 + L2).
On the other hand, when the flow path that communicates from the trap outlet To of the toilet body T to the building pipe P (socket outlet 133) and passes through the branch flow path DS on the way is defined as the sub-flow path SS, the flow path of the sub-flow path SS. The length LS is the distance L1 from the socket inlet (not shown) to the confluence J with the communication passage 132a and the flow path length LM of the main flow path MS from the confluence J with the communication passage 132a to the side extension entrance 132b. It is represented by the sum of the distance L21 to, the distance L3 of the branch flow path DS, and the distance L2 from the confluence point with the communication passage 132a to the socket outlet 133 (that is, LS = L1 + L21 + L3 + L2).
Therefore, when comparing the flow path length LM of the main flow path MS and the flow path length LS of the sub flow path SS, the flow path length LS of the sub flow path SS is longer by the amount of L21 + L3.

Further, it can be rephrased that the merging timing with the first washing water flowing through the main flow path MS is adjusted by passing the split flow washing water (second washing water) through the lateral expansion portion 132.
Therefore, the lateral expansion portion 132 functions as the merging timing adjusting means CTA.

By defining the branch flow path DS and the sub-flow path SS as described above, the inlet DSi of the branch flow path DS (that is, the side extension inlet 132b) becomes the outlet DSo of the branch flow path DS (that is, the end of the communication passage 132a). ) Is located downstream.
Further, since the branch flow path DS is formed inside the lateral expansion portion 132 and the side expansion portion 132 is tubular, it can be said that the branch flow path DS is formed by a pipe member.
Further, the branch flow path DS is arranged laterally in the left-right direction of the main flow path MS.

Further, the opening direction M of the inlet of the branch flow path DS (side extension portion inlet 132b) is open toward the upstream side of the main flow path MS.
As shown in FIG. 3, the opening direction N of the outlet DSo (that is, the communication passage 132a) of the branch flow path DS is orthogonal to the flow direction in the main flow path MS.
This makes it difficult for the washing water to flow from the main flow path MS toward the outlet DSo of the branch flow path DS.

Further, the height of the inlet DSi (side expansion portion inlet 132b) of the branch channel DS is formed to be equal to or higher than the height of the outlet DSo (that is, the communication path 132a) of the branch channel DS.
Further, the inside of the branch flow path DS has a downward slope.

The filth E has a larger mass than water, and the frictional force generated with the bottom surface of the flow path is also larger than that of water.
Therefore, when the filth E reaches the socket outlet 133, the flight distance of the filth E is shorter than that of the washing water, and the filth E may fall directly to the socket outlet 133 together with the washing water without straddling the socket outlet 133.
In this case, the socket outlet 133 functions as a filth intrusion suppressing means R for suppressing the filth E from entering the water storage unit 132.

Further, since the filth E has a certain size, when the filth flows through the main flow path MS and passes through the socket outlet 133, the direction of movement is reversed due to the collision with the protrusion 135, and the filth E reaches the socket outlet 133. Fall towards.
That is, the protruding portion 135 also functions as a filth intrusion suppressing means R for suppressing the entry of the filth E into the lateral expansion portion 132.

<1.6. Modification example of the first embodiment>
In the present embodiment, the drainage socket 100 is composed of three members, but if the outer shape of the drainage socket 100 is the same, the number of member points may be increased (for example, the inlet side bent pipe member 110 may be a vertical pipe member (vertical pipe). It may be divided into an elbow (corresponding to a bending region 112) and an elbow (corresponding to a bending region 112), or the number of member points may be reduced (for example, the inlet-side bending pipe member 110 and the parallel pipe member 130 are integrally molded).

Further, although the lateral expansion portions 132 are arranged on the left and right sides of the inlet portion 131, they may be arranged on either the left side or the right side of the inlet portion 131.
Further, the outer shape of each of the left and right lateral expansion portions 132 may be asymmetric.

The bottom surface inside the branch channel DS may be a combination of a downward slope and a horizontal plane as long as there is no upward slope.

In the present embodiment, the opening direction N of the communication passage 132a is orthogonal to the main flow path MS, but it may be opened toward the downstream side of the main flow path MS (that is, the opening direction N of the communication passage 132a). Crosses the main flow path MS.).

The diversion means D may be only the socket outlet 133 (that is, the guide 134 may not be provided).

The filth entry means R may be only the socket outlet 133 (that is, the protrusion 135 may not be provided).

<1.7. Action effect>
The drainage socket 100, which is the first embodiment of the present invention thus obtained, contains a relatively large amount of filth E in the washing water containing filth E supplied from the trap outlet To of the toilet body T. The diversion means D that divides the washing water into the second washing water containing relatively less filth E than the first washing water, and the confluence of the first washing water and the second washing water. Of the merging means C to be merged by J and the first washing water and the second washing water separated at the same timing by the dividing means C, the second washing water is delayed from the first washing water. By providing the merging timing adjusting means CTA that adjusts to reach the merging portion J, the filth E separated at the same timing as the first washing water having a relatively large amount of filth E by the diverging means D is relative. The second wash water, which is relatively small, is merged later than the first wash water.
That is, since the pre-washing water preceding the filth E can be delayed and merged with the backpack water following the filth E, the pre-washing water can be used for filth transport, and both water saving and high filth transport performance can be achieved at the same time. can.

Further, since the flow path length of the sub-flow path SS is longer than the flow path length of the main flow path MS, the shunt wash water flowing into the sub-flow path SS passes through the main flow path MS by passing through the shunt flow path DS. Since it passes through a flow path longer than E, the timing of joining the main flow path MS of the diversion wash water is adjusted, and the diversion wash water flowing into the sub flow path SS is converted into backpack water, improving the transport performance of filth E. Can be made to.
Further, the branch channel DS is a means for converting the preceding wash water into water carried on the back, and if the filth E enters the branch channel DS, the merging timing of the filth E is also adjusted, so that the preceding wash water is used. Cannot be converted to water on the back.
Therefore, by forming the filth invasion suppressing means R for suppressing the invasion of the filth E into the branch channel DS, the invasion of the filth E into the branch channel DS is surely suppressed, so that the amount of water carried on the back is surely suppressed. Can be increased.

Further, the inlet (branch channel inlet) DSi of the branch channel DS communicating with the main channel MS is arranged on the downstream side of the main channel MS from the outlet (branch channel outlet) DSo of the branch channel DS communicating with the main channel MS. Therefore, when at least a part of the preceding wash water flows into the sub-flow path SS, the shunt-flow wash water returns to the upstream by the flow path length of the shunt flow path DS, while the filth E flows to the downstream side in the main flow path MS. , The distance between the diversion washing water and the filth E can be increased, and the preceding washing water can be more reliably diverted to the carrying water.

Further, since the branch flow path DS is arranged on the side of the pipe member forming the main flow path MS, the side space of the main flow path MS having a relatively large gap with the flush toilet FT is utilized. The road DS can be formed longer.

Further, since the branch flow path inlet DSi of the branch flow path DS opens toward the upstream side of the main flow path MS, the branch flow path inlet DSi of the branch flow path DS opens with respect to the flow direction of the preceding wash water. It is possible to take in more pre-wash water into the branch channel DS and increase the amount of backpack water.

Further, since the diversion means D is a guide 134 that deflects the wash water by the Coanda effect, only the wash water is attracted to the guide 134, so that at least a part of the preceding wash water is more efficiently guided to the diversion channel DS. be able to.

Further, the height of the lower end of the branch flow path inlet DSi of the branch flow path DS is equal to or higher than the height of the lower end of the branch flow path outlet DSo of the branch flow path DS, and the inside of the branch flow path DS is formed by a downward slope or a horizontal bottom surface. As a result, since there is no upslope in the branch channel DS, a downwardly convex portion is not formed in the branch channel DS, and all the water that has entered the branch channel DS from the branch channel inlet DSi is discharged from the branch channel outlet DSo. Can be told to.

<2. 2nd Embodiment>
Subsequently, the drainage socket 200 according to the second embodiment of the present invention will be described with reference to FIGS. 6 to 8.
FIG. 6 is a partial cross-sectional perspective view of the drainage socket according to the second embodiment of the present invention, FIG. 7 is an enlarged plan sectional view of a main part of the drainage socket according to the second embodiment of the present invention, and FIG. It is a schematic diagram which shows the flow path length in the drainage socket which is 2nd Embodiment of this invention.

<2.1. Structure>
The drainage socket 200 according to the second embodiment of the present invention is also connected to the toilet bowl main body T like the drainage socket 100 according to the first embodiment of the present invention.
As shown in FIG. 6, the drainage socket 200 has three members, an inlet side bending pipe member 210, a parallel pipe member 220, and an outlet side bending pipe member 230, like the drainage socket 100 according to the first embodiment of the present invention. It is composed of.
As for the inlet-side bent pipe member 210, the same member as the drainage socket 100 according to the first embodiment of the present invention is used, and therefore detailed description thereof will be omitted.
The outlet-side bent pipe member 230 is a member having a substantially L-shape in a side view, and deflects the direction of the washing water flowing from the parallel pipe member 220, which will be described later, from the vertical direction to the vertically downward direction.

The flow path connecting the inlet of the inlet-side bending pipe member 210 to the socket outlet 233 of the outlet-side bending pipe member 230 is referred to as a main flow path MS.

<2.2. Structure of parallel pipe member>
As shown in FIG. 6, the parallel pipe member 220 is a pipe material extending in the horizontal direction, and connects the inlet side bent pipe member 210 and the inlet portion 231 of the outlet side bent pipe member 230.

The parallel pipe member 220 has a flow path portion 221 forming a part of the main flow path MS and a lateral expansion portion 222 formed on the left-right direction side portion of the flow path portion 221.
Conventionally, there is only a hakama part of the flush toilet on the side of the drain socket, and the distance between the drain socket and the hakama part of the flush toilet is between the drain socket and the bowl part or trap part of the flush toilet. Greater than the distance, the sides of the drain socket were considered dead space.
Therefore, in this embodiment, paying attention to this dead space, a side expansion portion 222 is provided on the side portion of the parallel pipe member 220.

As shown in FIGS. 6 and 7, a solid region 222c having a rounded corner shape is formed in a plan view substantially in the center of the lateral expansion portion 222, and the solid region 222c is laterally expanded. The ceiling surface and the bottom surface of the portion 222 are connected to each other.
Therefore, a space is formed between the side wall surface of the lateral expansion portion 222 and the solid region 222c, and this space becomes the branch flow path DS.

Here, focusing on the boundary surface between the lateral expansion portion 222 and the flow path portion 221, this boundary surface is divided into two by the solid region 222c, the rear side is the entrance (side expansion portion entrance) 222a, and the front side is. It becomes an exit (side extension part exit) 222d.

The opening direction M of the inlet 222a of the lateral expansion portion 222 is orthogonal to the main flow path MS.
Further, the inlet 222a is formed with a curved guide surface (guide) 222b that smoothly connects the flow path portion 221 and the lateral expansion portion 222.
Further, the opening direction N of the outlet 222d of the lateral expansion portion 222 is also orthogonal to the main flow path MS in the same manner as the opening direction M of the inlet 222a of the lateral expansion portion 222.

<2.3. Behavior of wash water>
Next, the behavior of the washing water in the drainage socket 200 according to the second embodiment of the present invention will be described with reference to FIG. 7.
Since the drainage socket 200 is symmetrical with respect to the center line AA in the left-right direction, only one side (right side) shows a streamline.

<2.3.1. Behavior of pre-wash water>
First, the behavior of the preceding wash water will be described.
As shown in FIG. 7, the washing water Wc flowing into the vicinity of the center (A-A line) of the horizontal pipe member 200 goes straight toward the outlet side bent pipe member 230.

Next, the behavior of the washing water Wo flowing through the position farthest from the vicinity of the center (A-A line) of the horizontal pipe member 200 (in other words, the position closest to the guide surface 222b) will be described.
As shown in FIG. 7, the washing water Wo flowing at the position farthest from the AA line is attracted to the guide surface (guide) 222b by the Coanda effect, the direction of the flow is deflected to the guide surface 222b side, and lateral expansion occurs. It flows into the unit 222.

Next, the behavior of the washing water W1 flowing between the washing water Wo flowing at the position farthest from the center (A-A line) of the horizontal pipe member 200 and the washing water Wc flowing near the A-A line will be described.
The wash water W1 is also deflected by the guide surface 222b corresponding to the curvature of the surface of the guide surface 222b, and flows into the lateral expansion portion 222.

As described above, a part of the preceding wash water flows toward the outlet side bending pipe member 230, and after being deflected to the guide surface 222b side, from the side expansion portion inlet 222a to the side expansion portion 222. It is roughly divided into those that are divided.

<2.3.2. Behavior of wash water containing filth>
Subsequently, the behavior of the washing water containing the filth E will be described.
As shown in FIG. 7, the washing water Wc containing the filth E that has flowed into the vicinity of the center (A-A line) of the horizontal pipe member 200 goes straight toward the outlet side bent pipe member 230.
Next, regarding the washing water W1 flowing between the washing water Wo flowing at the position farthest from the center (AA line) of the horizontal pipe member 200 and the washing water Wc flowing near the AA line, the preceding washing water The behavior is the same as that of the above, and a part of the water flows into the lateral expansion portion 222 as the diversion washing water.
The behavior of the diversion wash water flowing into the lateral expansion portion 222 is the same as the behavior of the preceding wash water.

At the timing when the filth E reaches the downstream side of the communication passage 132a, the diversion washing water flows out from the side expansion portion outlet 222d to the flow passage portion 221.
That is, the lateral expansion portion 222 forms a branch flow path DS that branches from the main flow path MS and then rejoins the main flow path MS.

<2.3.3. Behavior of backpack water>
Next, the behavior of the backpack water flowing after the filth E (particularly the backpack water supplied from the toilet bowl body) will be described.
The wash water Wc that has flowed into the vicinity of the center (AA line) of the horizontal pipe member 200, the wash water Wo that flows at the position farthest from the center (AA line) of the horizontal pipe member 200, and the vicinity of the AA line. The behavior is the same as that of the washing water W1 flowing between the washing water Wc and the preceding washing water, and a part of the washing water flows into the lateral expansion portion 222 as the diversion washing water.
The behavior of the diversion wash water flowing into the lateral expansion portion 222 is the same as the behavior of the preceding wash water.

<2.4. Function of each part>
Generally, water has a velocity gradient with the bottom surface of the flow path due to its own viscosity. Due to this velocity gradient, water has the property of diffusing in directions other than the flow direction.
Therefore, when the opening direction of the side expansion portion inlet 222a is formed perpendicular to the flow direction of the washing water (that is, the main flow path MS), the washing water is diverted to the side expansion portion inlet 222a as a diversion washing water.
Therefore, the lateral expansion portion inlet 222a functions as a flow diversion means D.

Further, the guide surface 222b deflects the washing water and guides it to the lateral expansion portion 222.
Therefore, the guide surface 222b also functions as the flow dividing means D.

Further, the second wash water containing relatively less filth than the first wash water passes through the branch flow path DS and joins the first wash water containing a relatively large amount of filth flowing through the main flow path MS. ..
Therefore, the lateral extension outlet 222d functions as the merging means C.
Further, the end of the lateral expansion portion outlet 222d is the confluence portion J.

Here, the flow path length of the drainage socket 200 according to the second embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 8, the flow path length LM of the main flow path MS is the distance L1 from the trap outlet To of the toilet bowl body T to the confluence point with the side extension inlet 222a and the confluence of the side extension inlet 222a. It is expressed as the sum of the distance from the point to the socket exit L2 (that is, LM = L1 + L2).
On the other hand, when the flow path that communicates from the trap outlet To of the toilet body T to the building pipe P (socket outlet 233) and passes through the branch flow path DS on the way is defined as the sub-flow path SS, the flow path of the sub-flow path SS. For the long LS, the flow path length LM of the main flow path MS is the distance L1 from the socket inlet (not shown) to the confluence point with the side extension inlet 222a, the distance L3 of the branch flow path DS, and the lateral extension outlet. It is represented by the sum of the distances L22 from 222d to the socket outlet (that is, LS = L1 + L3 + L22).
Therefore, when comparing the flow path length LM of the main flow path MS and the flow path length LS of the sub flow path SS, the flow path length LS of the sub flow path SS is longer by L3-L21.

Further, it can be rephrased that the merging timing with the first washing water flowing through the main flow path MS is adjusted by passing the split flow washing water (second washing water) through the lateral expansion portion 222.
Therefore, the lateral expansion portion 222 functions as the merging timing adjusting means CTA.

By defining the branch flow path DS and the sub-flow path SS as described above, the inlet DSi of the branch flow path DS (that is, the side extension inlet 222a) is connected to the outlet DSo of the branch flow path DS (that is, the communication passage 222d). It is located on the upstream side.
Further, since the branch flow path DS is formed inside the lateral expansion portion 222 and the side expansion portion 222 is tubular, it can be said that the branch flow path DS is formed by a pipe member.
Further, the branch flow path DS is located laterally in the left-right direction of the main flow path MS.

Further, the opening direction M of the inlet of the branch flow path DS (side extension portion inlet 222a) is orthogonal to the main flow path MS.
As shown in FIG. 7, the opening direction N of the outlet DSo (that is, the communication passage 222d) of the branch flow path DS is orthogonal to the flow direction in the main flow path MS.
This makes it difficult for the washing water to flow from the main flow path MS toward the outlet DSo of the branch flow path DS.

Further, the height of the inlet DSi (side expansion portion inlet 222a) of the branch flow path DS is formed to be equal to or higher than the height of the outlet DSo (side extension portion outlet 222d) of the branch flow path DS.
Further, the inside of the branch flow path DS is inclined downward toward the side extension outlet 222d.

Further, as described above, water generally has a velocity gradient with the bottom surface of the flow path due to its own viscosity.
Due to this velocity gradient, water has the property of diffusing in directions other than the flow direction.
On the other hand, since filth has a larger mass than water, it has inertia and has a property of higher straightness than water.
In order to suppress the ingress of filth into the lateral expansion portion 222, this property is utilized to orthogonal the opening direction M of the inlet (lateral expansion portion entrance) 222a of the side expansion portion 222 to the main flow path MS through which the filth flows. I made it in the direction of doing.
That is, the lateral expansion portion entrance 222a functions as a filth intrusion suppressing means R.

Further, since the solid region 222c is formed, the width of the lateral expansion portion inlet 222a is narrowed, and the function of suppressing the entry of filth into the lateral expansion portion inlet 222a is fulfilled.
That is, the solid region 222c also functions as the filth intrusion suppressing means R.

<2.5. Modification example of the second embodiment>
For example, in the present embodiment, the lateral expansion portions 222 are located on the left and right sides of the main flow path MS, but may be arranged on only one of the left and right sides.
Further, the left and right lateral expansion portions 222 may be displaced back and forth.

In the present embodiment, the opening direction M of the side expansion portion inlet 222a is orthogonal to the main flow path MS, but it may be opened toward the upstream side of the main flow path MS (that is, the side expansion portion). The opening direction M of the inlet 222a of 222 intersects with the main flow path MS).

In the present embodiment, the opening direction N of the side extension outlet 222d is orthogonal to the main flow path MS, but it may be opened toward the downstream side of the main flow path MS (that is, the side extension portion). The opening direction N of the outlet 222d intersects the main flow path MS).

In the present embodiment, the inlet DSi of the diversion washing water deceleration flow path DS is provided in the parallel pipe member 220, but it may be provided in the inlet side bent pipe member 210.

<2.6. Action effect>
The drainage socket 200 according to the second embodiment of the present invention thus obtained is the first that contains a relatively large amount of filth E in the washing water containing filth E supplied from the trap outlet To of the toilet body T. The diversion means D that divides the washing water into the second washing water containing relatively less filth E than the first washing water, and the confluence of the first washing water and the second washing water. Of the merging means C to be merged by J and the first washing water and the second washing water separated at the same timing by the dividing means D, the second washing water is delayed from the first washing water. By providing the merging timing adjusting means CTA that adjusts to reach the merging portion J, the filth E separated at the same timing as the first washing water having a relatively large amount of filth E by the diverging means D is relative. The second wash water, which is relatively small, is merged later than the first wash water.
That is, since the pre-washing water preceding the filth E can be delayed and merged with the backpack water following the filth E, the pre-washing water can be used for filth transport, and both water saving and high filth transport performance can be achieved at the same time. can.

Further, since the flow path length of the sub-flow path SS is longer than the flow path length of the main flow path MS, the shunt wash water flowing into the sub-flow path SS passes through the main flow path MS by passing through the shunt flow path DS. Since it passes through a flow path longer than E, the timing of joining the main flow path MS of the diversion wash water is adjusted, and the diversion wash water flowing into the sub flow path SS is converted into backpack water, improving the transport performance of filth E. Can be made to.
Further, the branch channel DS is a means for converting the preceding wash water into water carried on the back, and if the filth E enters the branch channel DS, the merging timing of the filth E is also adjusted, so that the preceding wash water is used. Cannot be converted to water on the back.
Therefore, by forming the filth invasion suppressing means R for suppressing the invasion of the filth E into the branch channel DS, the invasion of the filth E into the branch channel DS is surely suppressed, so that the amount of water carried on the back is surely suppressed. Can be increased.

Further, the inlet of the branch flow path DS communicating with the main flow path MS (branch channel inlet DSi) is arranged on the upstream side of the main flow path MS from the outlet of the branch flow path DS communicating with the main flow path MS (branch channel outlet DSo). As a result, the flow path resistance when the washing water flowing through the main flow path MS flows into the sub-flow path SS is reduced, and the flow velocity of the divergent washing water when flowing into the sub-flow path SS is immediately before flowing into the sub-flow path SS. Since the flow velocity of the preceding wash water can be maintained, the branch channel DS can be formed longer.

Further, since the branch flow path DS is arranged on the side of the pipe member forming the main flow path MS, the side space of the main flow path MS having a relatively large gap with the flush toilet FT is utilized. The road DS can be formed longer.

Further, since the branch flow path inlet DSi of the branch flow path DS is opened in the direction orthogonal to the flow direction of the preceding wash water, the preceding wash water diffuses in the main flow path MS and the branch flow path inlet of the branch flow path DS. While spreading to DSi, the filth E moves along the main flow path MS along the flow of the washing water due to its own inertial force, so that the filth can be prevented from entering the branch flow path DS by a simple method.

Further, since the flow dividing means D is a guide surface (guide) 222b that deflects the washing water by the Coanda effect, only the washing water is attracted to the guide surface 222b, so that at least the preceding washing water is more efficiently sent to the branch flow path DS. Some can be induced.

Further, the height of the lower end of the branch flow path inlet DSi of the branch flow path DS is equal to or higher than the height of the lower end of the branch flow path outlet DSo of the branch flow path DS, and the inside of the branch flow path DS is formed by a downward slope or a horizontal bottom surface. As a result, since there is no upslope in the branch channel DS, a downwardly convex portion is not formed in the branch channel DS, and all the water that has entered the branch channel DS from the branch channel inlet DSi is discharged from the branch channel outlet DSo. Can be told to.

<3. Modification example>
Although the embodiment for carrying out the present invention has been described above, the present invention is not limited to the above.

For example, a rib may be provided in the branch flow path DS, or a deceleration means for forming the bottom surface roughly may be provided as one of the merging timing adjusting means CTA.
As described above, since the merging timing adjusting means CTA has a deceleration means for decelerating the shunt flow washing water in the shunt flow path DS, the shunt flow wash water is decelerated in the shunt flow path DS, and the shunt flow wash water becomes the main flow path. Since the timing of returning to the MS is delayed, the diversion wash water can be reliably converted to the backpack water.

Further, as the type of the toilet bowl, there are "wash-off type", "siphon type", "siphon jet type" and the like, but any toilet bowl may be used.

100, 200 ・ ・ ・ Drainage socket 110, 210 ・ ・ ・ Inlet side bending pipe member 111, ・ ・ ・ Vertical pipe area 112, ・ ・ ・ Bending area 120, 220 ・ ・ ・ Parallel pipe member
221 ・ ・ ・ Flow path
222 ・ ・ ・ Lateral extension
222a ・ ・ ・ Water storage entrance
222b ・ ・ ・ Guide surface (guide)
222c ・ ・ ・ Solid area
222d ・ ・ ・ Water storage part outlet 130, 230 ・ ・ ・ Outlet side bending pipe member 131, 231 ・ ・ ・ Inlet part 132 ・ ・ ・ Side expansion part 132a ・ ・ ・ Communication passage 132b ・ ・ ・ Side expansion part entrance 133 , 233, ・ ・ ・ Socket outlet 134 ・ ・ ・ Guide 135 ・ ・ ・ Protruding part

FT ・ ・ ・ Washing toilet T ・ ・ ・ Toilet bowl body Tb ・ ・ ・ Bowl part Tt ・ ・ ・ Trap part To ・ ・ ・ Trap outlet Ts ・ ・ ・ Hakama part P ・ ・ ・ Building piping MS ・ ・ ・ Main flow path DS・ ・ ・ Branch flow path DSi ・ ・ ・ Branch flow path inlet DSo ・ ・ ・ Branch flow path outlet SS ・ ・ ・ Sub flow path C ・ ・ ・ Confluence means D ・ ・ ・ Dividing means CTA ・ ・ ・ Confluence timing adjustment means J ・ ・ ・Confluence R ・ ・ ・ Means for suppressing the entry of filth W ・ ・ ・ Washing water E ・ ・ ・ Sewage F ・ ・ ・ Floor M, N ・ ・ ・ Opening direction

Claims (12)

A drainage socket that connects the trap outlet of the toilet bowl to the building piping.
A main flow path that passes communication up to the building pipe from the trap outlet of the toilet body,
A branch passage having a junction unit which is branched from the main flow path to rejoin the main channel,
The washing water containing filth supplied from the trap outlet of the toilet bowl body contains the first washing water containing a relatively large amount of filth and the filth contained relatively less than the first washing water. The diversion means for diversion to the washing water of 2 and
A merging timing adjusting means for adjusting so that the second washing water diverted by the diverging means rejoins the main flow path at the merging portion is provided.
Drainage socket, characterized in that the merging timing adjusting means is a long channel-flow path length than the previous SL main channel. The drainage socket according to claim 1, wherein the merging timing adjusting means has a deceleration means for decelerating the second washing water in the branch flow path. A drainage socket that connects the trap outlet of the toilet bowl to the building piping.
A main channel communicating from the trap outlet of the toilet bowl up to the building pipe,
A branch flow path having a merging portion that branches from the main flow path and rejoins the main flow path,
The washing water containing filth supplied from the trap outlet of the toilet bowl body contains the first washing water containing a relatively large amount of filth and the filth contained relatively less than the first washing water. The diversion means for diversion to the washing water of 2 and
A merging timing adjusting means for adjusting so that the second washing water diverted by the diverging means rejoins the main flow path at the merging portion is provided.
A drainage socket characterized in that the merging timing adjusting means has a deceleration means for decelerating the second washing water in the branch flow path. A filth invasion suppressing means for suppressing the invasion of the filth into the branch channel is provided.
The claim is characterized in that the diversion means distributes at least a part of the pre-washing water preceding the filth from the washing water for discharging the filth from the main flow path to the diversion channel as the second washing water. The drainage socket according to claim 1 or claim 3. The first or third aspect of the present invention, wherein the inlet of the branch flow path communicating with the main flow path is arranged on the downstream side of the main flow path from the outlet of the branch flow path communicating with the main flow path. Drainage socket. The first or third aspect of the present invention, wherein the inlet of the branch flow path communicating with the main flow path is arranged on the upstream side of the main flow path from the outlet of the branch flow path communicating with the main flow path. Drainage socket. The main flow path is formed by a pipe member, and the main flow path is formed by a pipe member.
Said branch passage is drained socket according to any one of claims 1 to 6, characterized in that it is arranged on the side of the pipe member forming the main flow path. The drainage socket according to any one of claims 1 to 7, wherein the inlet of the branch flow path is open toward the upstream side of the main flow path. The drainage socket according to claim 4 , wherein the inlet of the branch flow path is opened in a direction orthogonal to the flow direction of the preceding wash water. The drainage socket according to any one of claims 1 to 9, wherein the diversion means is a guide for deflecting the washing water by the Coanda effect. The height of the lower end of the inlet of the branch flow path is equal to or higher than the height of the lower end of the outlet of the branch flow path.
The drainage socket according to any one of claims 1 to 10, wherein the inside of the branch flow path is formed by a downward slope or a horizontal bottom surface. A flush toilet equipped with the drainage socket according to any one of claims 1 to 11.

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