JP6063712B2 - Toilet drainage channel - Google Patents

Description

  The present invention relates to a toilet drainage channel.

  Patent Document 1 discloses a conventional toilet drainage channel. The toilet drainage channel communicates with the lower side of the ascending channel that communicates with the lower part of the toilet bowl of the flush toilet and extends upward. The toilet drainage channel is a downward channel extending continuously downward on the downstream side of the ascending channel, a bent channel that is continuous on the downstream side of the descending channel, and changes the channel direction from downward to lateral. A laterally extending flow path extending continuously in the lateral direction downstream of the bent flow path. In this toilet drainage channel, the lower inner wall surface forming the bent channel is formed on a substantially horizontal flat surface.

  When the flushing water overflows the top of the toilet drainage channel, which is the boundary between the ascending channel and the descending channel, the toilet drainage channel is separated from the inner wall on the ascending channel side that forms the descending channel. Then, it flows down the downward flow path, directly collides with the flat lower surface of the curved flow path, and jumps up obliquely upward. In this way, the toilet drainage channel can form a water film that seals the toilet drainage channel, can generate siphon action, and can discharge filth and the like.

JP 2010-236203 A

  However, the toilet drainage channel of Patent Document 1 is arranged along the inner wall surface on the ascending channel side that forms the descending channel when the flow rate of the washing water that overflows the top of the toilet drainage channel is small in the initial stage of toilet cleaning. Wash water flows down. Under this circumstance, even if the cleaning water collides with the flat lower surface of the bent flow path, it does not splash well and it is difficult to form a water film. In other words, this toilet drainage channel forms a water film until the flow rate of the washing water increases to a state where it peels off from the inner wall surface on the ascending flow channel side that vigorously overflows the top of the toilet drainage channel and forms the descending flow channel. Is insufficient and siphon action does not occur. Thus, this toilet drainage channel takes time from the start of toilet flushing until a water film is formed, and the washing water flowing through the toilet drainage channel is involved in the water film formation in the initial stage of toilet flushing. Without being discharged from the toilet drainage channel.

  In addition, since this toilet drainage channel has a flat inner wall surface that forms a curved channel, most of the wash water flowing through the toilet drainage channel after the siphon action has occurred on this flat inner wall surface. It collides and changes the flow direction, and further collides with the upper inner wall surface that forms the bent flow channel or the upper inner wall surface that forms the lateral flow channel, and flows downstream. For this reason, the flow of the cleaning water is disturbed in the bent flow path, and the water flow of the cleaning water toward the discharge direction of the horizontal pulling flow path becomes weak, and there is a possibility that filth and the like cannot be discharged well.

  The present invention has been made in view of the above-described conventional situation, and it is a problem to be solved to provide a toilet drainage channel that can generate siphon action with a small amount of washing water and can discharge filth and the like satisfactorily. It is said.

The toilet drainage channel of the present invention is a toilet drainage channel that communicates with the downstream side of the rising channel that communicates with the lower part of the toilet bowl of the flush toilet and extends upward,
A downward flow path extending substantially vertically downward continuously from the downstream side of the upward flow path;
A bent channel that is continuous downstream of the descending channel and changes the channel direction from downward to lateral;
A laterally extending flow path extending in the lateral direction continuously downstream of the bent flow path;
Provided on the inner wall surface of the lower forming a pre-Symbol crosscut channel, characterized in that the washing water that has collided is provided with a stepped portion for generating the formed siphon action the water film to scatter.

  In this toilet drainage channel, the washing water colliding with the stepped portion provided on the lower inner wall surface forming the bent flow channel or the lower inner wall surface forming the horizontal pulling channel scatters to form a water film. With this water film, the toilet drainage channel can be blocked and a siphon action can be generated in the toilet drainage channel. This toilet drainage channel is from the initial stage of toilet flushing (the situation where the flow of washing water flows along the inner wall surface on the ascending flow path side that forms a descending flow path and the lower inner wall surface that forms a curved flow path). The washing water collides with the stepped portion and scatters, thereby forming a water film that seals the toilet drainage channel. For this reason, this toilet drainage channel can generate siphon action early when toilet flushing is started.

  In addition, this toilet drainage channel has only a part of the washing water flowing through the toilet drainage channel after the siphon action collides with the stepped portion, and a lot of the washing water does not collide with the stepped portion. Flows downstream. For this reason, there is little disturbance in the flow of the cleaning water in the bent channel or the horizontal channel, and the cleaning water can flow vigorously in the bent channel and the horizontal channel.

  Therefore, the toilet drainage channel of the present invention can generate a siphon action with a small amount of washing water and can discharge filth and the like satisfactorily.

It is sectional drawing of the toilet body main body provided with the toilet drainage channel of Example 1. FIG. It is sectional drawing of the toilet bowl drainage channel of Example 1. FIG. It is an XX cross section of the arrow of FIG. It is an arrow YY cross section of FIG. It is sectional drawing of the toilet bowl drainage channel of the reference example 1 .

  A preferred embodiment of the present invention will be described.

  In the toilet drainage channel of the present invention, the lower inner wall surface forming the bent channel may have an arc shape. In this case, the flow direction of the bent flow path is changed from the downward direction to the horizontal direction, and the inclination of the lower inner wall surface becomes gentler toward the downstream side. The lower the inner wall surface of the bent flow path becomes, the lower the center portion thereof becomes compared to the both sides thereof. For this reason, the wash water flowing into the bent flow path flows downstream while gathering at the center of the lower inner wall surface. Therefore, even if the flow rate of the washing water flowing into the bent flow path is small at the initial stage of toilet flushing, the washing water gathers at the center of the lower inner wall surface and flows vigorously and collides with the stepped portion. For this reason, washing water can be scattered well and a water film can be formed. Thus, this toilet drainage channel can generate siphon action with a small amount of washing water at an early stage after the start of toilet flushing.

  In the toilet drainage channel according to the present invention, the inner wall surface of the bent flow path can be gently curved in the direction of the flow path so that the washing water flows along the lower inner wall surface forming the bent flow path. In this case, the washing water smoothly flows on the lower inner wall surface forming the bent flow path and collides with the stepped portion. For this reason, washing water can be scattered well and a water film can be formed. Thus, this toilet drainage channel can generate siphon action with a small amount of washing water at an early stage after the start of toilet flushing.

  In the toilet drainage channel of the present invention, the stepped portion may be formed by denting a lower inner wall surface forming the lateral pulling channel. In this case, the toilet drainage channel has a channel area that is not too narrow, and after the siphon action occurs, the washing water can flow smoothly through the toilet drainage channel, and filth and the like can be discharged well.

In the toilet drainage channel of the present invention, the stepped portion may be formed by projecting the inner wall surface of the lower forming the crosscut channel. In this case, the step portion can be formed without the outer surface of the toilet drainage channel expanding outward.

  The toilet drainage channel according to the present invention includes a throttle portion in which an upper inner wall surface forming a boundary portion between the bent flow channel and the horizontal pulling channel protrudes downward to narrow the flow channel. The step may be formed on the downstream side. In this case, a water film is formed on the downstream side of the throttle part, and the siphon action can be reliably generated by the synergistic effect of the water film and the throttle part.

Next, the toilet drainage channel of the present invention with the first embodiment that embodies will be described with reference to the drawings.

<Example 1>
As shown in FIG. 1, the toilet drainage channel 20 of the first embodiment communicates with the downstream side of the ascending flow path 12 that communicates with the lower part of the toilet bowl 11 of the flush toilet and extends upward. The toilet bowl 11, the rising channel 12, and the toilet drainage channel 20 are made of earthenware and are integrally formed, and constitute the main part of the toilet body 10 of the flush toilet. The toilet body 10 has a mounting portion 13 for mounting the cleaning tank on the rear surface of the upper surface. The flush toilet is provided with a washing tank (not shown) that is placed and fixed on the placing portion 13.

  The toilet bowl 11 forms a rim water passage 14 at the upper periphery. When the flush toilet performs toilet flushing, flush water stored in the flush tank flows out to the rim water passage 14 of the toilet bowl 11. The wash water that has flowed out to the rim water passage 14 gradually flows down to the surface of the toilet bowl 11 while flowing in the rim water passage 14 in one direction. For this reason, the washing water flows down in the plan view of the toilet bowl 11 while turning in one direction on the surface of the toilet bowl 11 and flows into the ascending flow path 12. The ascending flow path 12 rises obliquely upward toward the back of the toilet body 10 (left side in FIG. 1).

  The toilet drainage channel 20 includes a descending channel 21, a bent channel 22, and a horizontal channel 23. The descending flow path 21 continues to the downstream side of the ascending flow path 12 and extends substantially vertically downward. The toilet body 10 has a cavity 15 formed to extend rearward from the upper part in a portion where the ascending channel 12 and the descending channel 21 are continuous. As shown in FIG. 2, the descending flow path 21 extends to a height of a point V at which the rear inner wall surface 21 </ b> B forming the descending flow path 21 starts to bend backward greatly.

  The bent channel 22 is continued downstream from the descending channel 21 and changes the channel direction from downward to lateral. The bent flow path 22 includes an upper inner wall surface 22U that forms the bent flow path 22 and an upper inner wall surface 23U that forms the horizontal pulling flow path 23 continuously from the rear inner wall surface 21B that forms the descending flow path 21. It has a downstream end that opens horizontally in a vertical plane E that passes through the lowest end W. In the vicinity of the lowermost end W is an upper inner wall surface that forms a boundary portion between the bent flow path 22 and the horizontal pulling flow path 23, and this portion protrudes downward to form a throttle portion 24 that narrows the flow path. Yes.

  As shown in FIG. 3, the bent channel 22 has a lower inner wall surface 22 </ b> D that forms the bent channel 22 formed in an arc shape. Further, as shown in FIGS. 1 and 2, the bent channel 22 has an inner wall surface 22D in the channel direction so that the washing water flows along the lower inner wall surface 22D forming the bent channel 22. It is gently curved.

The horizontal pulling channel 23 extends in the horizontal direction and forms a discharge port 25 opened in the horizontal direction at the downstream end. The upper inner wall surface 23U that forms the horizontal pulling channel 23 includes a portion 23A that extends obliquely upward from the downstream end of the bent channel 22 and a portion 23B that extends rearward in a substantially horizontal direction downstream thereof. It consists of and. The lower inner wall surface 23D forming the horizontal pulling flow path 23 is downstream of the throttle portion 24 and forms a step portion 26 below a portion 23A in which the upper inner wall surface 23U extends obliquely upward. . As shown in FIGS. 1, 2, and 4, the stepped portion 26 has a rising surface 26 </ b> A that is recessed in a lower inner wall surface 23 </ b> D that forms the horizontal pulling flow path 23 and rises substantially vertically. Yes. That is, as shown in FIG. 2, the lower inner wall surface 23 </ b> D forming the horizontal pulling channel 23 is formed from the downstream end 22 </ b> A of the lower inner wall surface 22 </ b> D forming the bent channel 22 to the upper surface of the step portion 26. It is recessed rather than the virtual straight line S extended toward.

  Next, how the flushing water flows in the toilet drainage channel 20 when the flush toilet performs toilet flushing will be described.

  In the flush toilet, when toilet flushing is started, flush water that has overflowed the top T of the toilet drainage channel 20 flows into the descending flow path 21 of the toilet drainage channel 20. In the initial stage of toilet flushing, the flow rate is small, and the wash water flows along the front inner wall surface 21 </ b> A that forms the descending flow path 21 and the lower inner wall surface 22 </ b> D that forms the bent flow path 22.

  In this situation, since the lower inner wall surface 22D that forms the bent flow path 22 has an arc shape, the toilet drainage channel 20 has a washing water gathering at the central portion of the lower inner wall surface 22D, and the downstream side wall surface 22D. Flowing. For this reason, even if the flow rate of the wash water flowing into the bent flow path 22 is small at the initial stage of toilet flushing, the wash water collects in the central portion of the lower inner wall surface 22D and flows vigorously. , It collides with the rising surface 26A of the stepped portion 26. Further, the toilet drainage channel 20 is bent because the inner wall surface 22D is gently curved in the flow channel direction so that the washing water flows along the lower inner wall surface 22D forming the bent flow channel 22. The washing water smoothly flows through the lower inner wall surface 22D forming the flow path 22 and collides with the rising surface 26A of the stepped portion 26.

  Then, the cleaning water colliding with the rising surface 26A of the stepped portion 26 is scattered (in the direction of arrow H in FIG. 2) to form a water film. Thus, this toilet drainage channel 20 can generate a siphon action with a small amount of washing water early after the start of toilet flushing. Further, since the step portion 26 is formed on the downstream side of the throttle portion 24, a water film is formed on the downstream side of the throttle portion 24, and the siphon action is reliably generated by the synergistic effect of this water film and the throttle portion 24. Can be made.

  Further, in the toilet drainage channel 20, only a part of the washing water flowing through the toilet drainage channel 20 collides with the rising surface 26 </ b> A of the stepped portion 26 after the siphon action is generated. It flows to the downstream side of the step portion 26 without colliding with the rising surface 26A. For this reason, there is little disturbance in the flow of the cleaning water in the horizontal pulling flow path 23, and the cleaning water can flow vigorously through the horizontal pulling flow path 23. Further, the toilet drainage channel 20 has a stepped portion 26 formed by denting the lower inner wall surface 23D forming the horizontal pulling channel 23, so that the channel area is not too narrow and siphon action occurs. After that, the washing water flows smoothly through the toilet drainage channel 20.

  Therefore, the toilet drainage channel 20 according to the first embodiment generates a siphon action with a small amount of washing water, and can effectively discharge filth and the like.

< Reference Example 1 >
As shown in FIG. 5, the toilet drainage channel 120 of Reference Example 1 has a stepped portion 126 formed on a lower inner wall surface 122 </ b> D that forms a bent flow channel 122, and a lower inner wall that forms a horizontal pulling flow channel 123. It is different from the first embodiment in that it is not formed on the wall surface 123D. The same configurations as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The stepped portion 126 is formed by projecting a lower inner wall surface 122D that forms the bent flow path 122 on the upstream side of the throttle portion 24. The stepped portion 126 has a rising surface 126A that rises substantially perpendicular to the lower inner wall surface 122D. For this reason, a step part can be formed without the outer surface of the toilet drainage channel expanding outward.

  In the toilet drainage channel 120, the lower inner wall surface 122D that forms the bent flow channel 122 has an arc shape, so that the cleaning water flows downstream while gathering at the center of the lower inner wall surface 122D. For this reason, in this toilet drainage channel 120, even if the flow rate of the wash water flowing into the bent flow path 122 is small at the initial stage of toilet flushing, the wash water gathers at the center of the lower inner wall surface 122D and flows vigorously. , It collides with the rising surface 126A of the stepped portion 126. The toilet drainage channel 120 is also bent because the inner wall surface 122D is gently curved in the flow channel direction so that the washing water flows along the lower inner wall surface 122D forming the bent flow channel 122. The washing water smoothly flows through the lower inner wall surface 122D forming the flow path 122 and collides with the rising surface 126A of the stepped portion 126.

  Then, the cleaning water colliding with the rising surface 126A of the stepped portion 126 is scattered (in the direction of arrow H in FIG. 5) to form a water film. Thus, this toilet drainage channel 120 can also generate a siphon action with a small amount of washing water at an early stage after the start of toilet flushing.

  The toilet drainage channel 120 also has only a part of the washing water flowing through the toilet drainage channel 120 after the siphon action collides with the rising surface 126A of the stepped portion 126. It flows to the downstream side of the stepped portion 126 without colliding with the rising surface 126A. For this reason, there is little disturbance in the flow of the washing water in the bent flow path 122, and the washing water can flow vigorously through the bent flow path 122.

Therefore, the toilet drainage channel 120 of Reference Example 1 can also generate a siphon action with a small amount of washing water, and can discharge filth and the like satisfactorily.

The present invention is not limited to the first embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first embodiment, the inner wall surface of the lower forming a curved flow path is an arc shape may not be a circular arc shape.
(2) In the first embodiment, the stepped portion is formed by denting the lower inner wall surface forming the horizontal pulling channel, but the inner wall surface may be protruded.
(3) In Example 1, it had a throttle portion may not have a throttle portion.
(4) In the embodiment 1, has formed the toilet drainage channel together with a downstream end of the upward flow passage, the upward flow path toilet drain passage is formed separately, downstream of the upflow channel You may connect to.

DESCRIPTION OF SYMBOLS 11 ... Toilet bowl part 12 ... Ascending flow path 20,120 ... Toilet drainage path 21 ... Downstream flow path 22, 122 ... Bending flow path 22D, 122D ... (Forming a bending flow path) Lower inner wall surface 23, 123 ... Horizontally drawn flow path 23D ... (forms horizontal drawn flow path) lower inner wall surface 24 ... throttle part 26, 126 ... stepped part

Claims (6)

A toilet drainage channel that communicates with the downstream side of the rising channel that communicates with the lower part of the toilet bowl of the flush toilet and extends upward,
A downward flow path extending substantially vertically downward continuously from the downstream side of the upward flow path;
A bent channel that is continuous downstream of the descending channel and changes the channel direction from downward to lateral;
A laterally extending flow path extending in the lateral direction continuously downstream of the bent flow path;
Provided on the inner wall surface of the lower forming a pre-Symbol crosscut channel, the toilet drainage channel, characterized in that the washing water that has collided is provided with a stepped portion for generating the formed siphon action the water film to scatter .   2. The toilet drainage channel according to claim 1, wherein a lower inner wall surface forming the bent channel has an arc shape.   2. The bent channel is characterized in that the inner wall surface is gently curved in the channel direction so that washing water flows along the lower inner wall surface forming the bent channel. Or the toilet drainage channel of 2 description.   The toilet drainage channel according to any one of claims 1 to 3, wherein the stepped portion is formed by recessing a lower inner wall surface forming the horizontal pulling channel. The stepped portion toilet drainage channel according to any one of claims 1 to 3, characterized in that which is formed by projecting the inner wall surface of the lower forming the crosscut channel.   The upper inner wall surface that forms the boundary between the bent flow path and the horizontal pulling flow path is provided with a throttle portion that projects downward to narrow the flow path, and the step portion is formed on the downstream side of the throttle portion. The toilet drainage channel according to any one of claims 1 to 5, wherein the toilet drainage channel is provided.

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