JP7378957B2 - flush toilet - Google Patents

Description

The present invention relates to a flush toilet bowl.

Patent Document 1 shows a conventional flush toilet bowl. This flush toilet is equipped with a toilet bowl and a drainage channel. A pair of mounting holes for attaching a toilet seat are formed at the rear of the toilet bowl. The distance from the front end of the toilet bowl, the hole spacing, the diameter, etc. of these mounting holes are standardized. The drainage channel has an upstream trap section and a downstream connecting pipe, and is continuous to the lower end of the toilet bowl. The trap part is formed in a substantially U-shape that is a combination of a flow path extending downward from the lower end of the toilet bowl and a flow path continuously provided on the downstream side of the flow path and extending upward. As a result, the cleaning water is stored in the trap section as water, and the flow of air from the sewage side is blocked. The height of the accumulated water is determined by the height of the lower surface of the rising end of the channel extending above the trap section.

JP2016-89431A

By the way, when considering miniaturization of flush toilets, it is difficult to change the size because the length of the toilet bowl in front of the toilet seat mounting hole is standardized. Therefore, efforts to reduce the size of the toilet bowl are limited to consideration of the rear part of the toilet bowl. However, as in the flush toilet of Patent Document 1, when the drainage channel is provided extending from the bottom end of the toilet bowl to near the rear end of the flush toilet, and the space at the rear of the toilet is occupied by the drainage channel, the space at the rear of the toilet is It is also difficult to consider miniaturization.

The present invention has been made in view of the above-mentioned conventional situation, and an object to be solved is to provide a flush toilet that can improve the degree of freedom in designing the space at the rear of the toilet.

The flush toilet of the present invention is
A toilet bowl part,
an upper surface portion formed with a pair of mounting holes extending rearward of the toilet bowl portion and penetrating in the vertical direction to which a toilet seat device is attached;
A trap drainage channel having an introduction channel formed to communicate with the downstream side of the toilet bowl portion and extending downward and rearward, and an ascending channel formed to extend upward continuously from the downstream end of the introduction channel. and,
It is equipped with
The top of the trap drainage channel, which is the lower end of the downstream end of the ascending flow channel, is located forward of the attachment hole.

In this flush toilet bowl, the top of the trap drainage channel, which is the lower end of the downstream end of the ascending flow channel, is located forward of the pair of attachment holes to which the toilet seat device is attached. That is, the top is set at a position closer to the front of the flush toilet bowl. Thereby, the length of the trap drainage channel in the front-rear direction can be suppressed. As a result, it is possible to improve the degree of freedom in designing the structure of the trap drainage channel downstream of the ascending channel, such as considering miniaturization.

Therefore, the flush toilet of the present invention can improve the degree of freedom in designing the space at the rear of the toilet.

1 is a plan view of a flush toilet according to Example 1. FIG. FIG. 2 is a left side view of the flush toilet according to the first embodiment. FIG. 2 is a diagram showing a toilet device including a flush toilet according to Example 1, and is a sectional view corresponding to the line III-III in FIG. 1. FIG. 1 is a perspective cross-sectional view of a flush toilet according to Example 1. FIG. 4 is a diagram showing a flush toilet according to Example 1, and is a sectional view corresponding to the VV line in FIG. 3. FIG. 1 is an enlarged cross-sectional view of a main part of a flush toilet according to Example 1. FIG. 7 is an enlarged view of a main part taken along the line VII-VII in FIG. 6. FIG. 7 is a sectional view taken along line VIII-VIII in FIG. 6. FIG. 7 is an enlarged view of a main part taken along the line IX-IX in FIG. 6. FIG. 7 is a sectional view taken along the line XX in FIG. 6. FIG. 7 is a sectional view taken along the line XI-XI in FIG. 6. FIG. FIG. 3 is a side cross-sectional view showing a flush toilet according to Example 2. FIG. 7 is a side sectional view showing a flush toilet according to another embodiment.

A preferred embodiment of the present invention will be described.

In the flush toilet bowl of the present invention, the inclination angle of the ascending flow path can be made larger than the inclination angle of the introduction flow path. In this case, it is possible to easily realize a flush toilet bowl in which the length of the trap drainage channel in the front and back direction is suppressed.
In addition, when the above-mentioned "inclination angle of the ascending channel" and "inclination angle of the introduction channel" are formed in a curved manner, the above-mentioned "inclination angle of the ascending channel" and "inclination angle of the introducing channel" refer to the average value of the entire channel when the ascending channel or the introducing channel is formed in a curved manner. The angle of inclination can be Furthermore, if the flow path has a straight portion, the inclination angle of only the straight portion may be used as the inclination angle of the flow path.

In the flush toilet of the present invention, the trap drain is such that the distance in the longitudinal direction from the lower end of the ascending channel to the top of the trap drain is equal to the longitudinal distance from the lower end of the introduction channel to the front end of the introduction channel. It may be formed in a form that is approximately equal to or smaller than the distance in the front-rear direction from the lower end of the introduction channel to the front end of the introduction channel. In this case, miniaturization can be achieved more easily.

In the flush toilet of the present invention, the trap drainage channel has a size in the left-right direction that is larger than the size in the direction perpendicular to the left-right direction in the flow channel cross section of the area from the inlet of the introduction channel to the midway position of the ascending channel. Can be formed large. In this case, it is possible to easily realize a flush toilet in which not only the size of the trap drainage channel in the front and back direction but also the size in the vertical direction is suppressed.
Note that the above-mentioned "midway position of the ascending channel" can be, for example, a position below the reservoir water level. In addition, the above "size in the left and right direction" refers to the size at the widest part of the left and right width, and the above "size in the direction perpendicular to the left and right direction" refers to the size in the orthogonal direction at the center position in the left and right direction. are doing.

In the flush toilet bowl of the present invention, the trap drainage channel may have a descending channel formed to extend downward continuously from the downstream end of the ascending channel. The trap drainage path may form an S trap in which the discharge port of the descending flow path opens facing downward, or a P trap opening facing backward. In this case, even if the S-trap or P-trap is formed with the same front shape, it is possible to realize a flush toilet with a reduced length from the rear wall surface to the front end of the toilet when installed. .

In the flush toilet of the present invention, the trap drainage path forms an S-trap, and the drain outlet of the descending flow path and the drain pipe located below the toilet bowl part when it is pulled out to the floor surface and installed. A drain socket may be provided for connection with the drain socket. In this case, even if the distance from the rear wall to the center of the drain pipe is long and the drain pipe is located below the toilet bowl, it can be installed at an appropriate position near the wall.

In the flush toilet bowl of the present invention, the lower end surface of the trap drain channel may have a height that allows the drain socket to be accommodated therein. In this case, a drainage socket for floor drainage can be arranged without difficulty.

In the flush toilet of the present invention, an anti-freeze heater may be attached to the trap drain channel, the antifreeze heater having an opening with a lower end surface exposed at a position corresponding to the drain socket. In this case, the lower end surface of the trap drain can be formed closer to the floor surface than in the trap drain where a heater is attached to cover the lower end surface.

Next, Examples 1 and 2 embodying the flush toilet of the present invention will be described with reference to the drawings. In the following explanation, the up and down direction refers to the up and down direction when the flush toilet is installed (the up and down direction in Figures 2, 3, 6, 8, and 10 to 12), and the front and back direction refers to the up and down direction when the flush toilet is installed. The side where the toilet bowl part is formed is the front, and the side where the trap drainage channel is formed is the rear (in Figures 2 and 3, the right side is the front and the left side is the rear), and the left and right directions are flush type. These are the left and right sides (left and right in FIGS. 1 and 5) of the flush toilet seen from the front (toilet bowl side) with the toilet installed.

<Example 1>
The flush toilet bowl 1 of Example 1 is a flush toilet bowl. As shown in FIGS. 1 to 4, the flush toilet 1 includes a toilet bowl portion 10, a trap drainage channel 20, a peripheral wall portion 30, a water guide portion 40, and a tank installation portion 50.

The toilet bowl section 10 receives filth and through which wash water for washing the filth flows. As shown in FIGS. 1, 3, and 4, the toilet bowl portion 10 has an upper wall portion 11, an intermediate wall portion 15, a lower wall portion 17, and a bottom wall portion 19. The upper wall portion 11 forms the upper peripheral edge of the toilet bowl portion 10. This upper wall portion 11 has a band shape that stands up in the vertical direction, and is slightly inclined outward toward the top. Further, the upper end periphery of the upper wall portion 11 has a substantially elliptical shape when viewed from above. In the upper wall portion 11, a spout 11A is formed on the left side of the left and right center on the rear side, the water spout 11A having a longitudinal direction in the horizontal direction. The water spout 11A spouts flush water supplied from the water guide section 40 into the toilet bowl section 10.

As shown in FIGS. 1, 3, and 4, the intermediate wall portion 15 forms the front and rear surfaces and left and right side surfaces of the toilet bowl portion 10 below the upper wall portion 11. That is, the intermediate wall portion 15 extends inwardly from the lower ends of the front and rear sides and left and right sides of the upper wall portion 11 while gently slanting downward.

The lower wall part 17 and the bottom wall part 19 form a recess 13 in the lower part of the toilet bowl part 10. As shown in FIG. 1, FIG. 3, and FIG. 4, the lower wall portion 17 forms front and rear surfaces and left and right side surfaces of the toilet bowl portion 10 on the inner side and lower side than the intermediate wall portion 15. The lower wall portion 17 has a cylindrical shape that stands up in the vertical direction, and is slightly inclined inward from the lower end of the intermediate wall portion 15 downward. As shown in FIG. 3, the bottom wall portion 19 forms the bottom surface of the toilet bowl portion 10 inside and below the lower wall portion 17. The bottom wall portion 19 is inclined slightly downward from the lower end of the lower wall portion 17 toward the inside. The bottom wall portion 19 has an inflow portion X of a trap drainage channel 20 formed at the rear thereof. As shown in FIG. 3, in the flush toilet bowl 1, the water reservoir surface R is formed above the upper surface of the bottom wall portion 19.

The trap drainage channel 20 is formed to communicate with the downstream side of the toilet bowl portion 10. The trap drainage channel 20 is provided to form accumulated water in the lower part of the toilet bowl portion 10. The height of the water surface R in the toilet bowl portion 10 is determined by the height of the top C of the trap drainage channel 20. The trap drainage channel 20 extends further rearward than the toilet bowl portion 10. As shown in FIGS. 3 to 11, the trap drainage channel 20 has an introduction channel 21, an ascending channel 23, a first descending channel 25, and a second descending channel 27. The trap drainage channel 20 forms an S trap in which the discharge port 27A of the second downward flow channel 27 faces downward. A drainage socket 70, which will be described later, is connected to the downstream end of the trap drainage channel 20.

The upstream end of the introduction channel 21 is continuous with the inflow section X of the trap drainage channel 20 formed in the bottom wall section 19 of the toilet bowl section 10 . That is, the trap drainage channel 20 communicates with the downstream side of the toilet bowl portion 10. The introduction flow path 21 extends downward from the rear portion of the lower end of the toilet bowl portion 10, and curves rearward toward the downstream. As shown in FIGS. 3, 4, 6, and 8, the downstream end of the introduction channel 21 faces in the horizontal direction and opens toward the rear. The lower end A of the downstream end of this introduction channel 21 is the lowest end in the trap drainage channel 20. Further, the front end B of the upstream end of the introduction channel 21 is the front end of the inflow portion X, and is the front end of the trap drainage channel 20. Further, the upstream end of the introduction channel 21 is an inflow section X, and the front end of this inflow section X is the front end B of the introduction channel 21.

The ascending flow path 23 is continuous with the opening at the downstream end of the introduction flow path 21 . That is, the lower end of the upstream end of this rising flow path 23 is the lower end A of the downstream end of the introduction flow path 21. The ascending flow path 23 is inclined obliquely rearward toward the upper side. The downstream end of the ascending channel 23 faces in the horizontal direction and opens rearward. The lower end of the downstream end of the ascending channel 23 is the top C of the trap drainage channel 20 . As shown in FIGS. 10 and 11, the top portion C extends substantially horizontally in the left-right direction.

As shown in FIG. 6, in this embodiment, the inclination angle θ2 of the ascending flow path 23 is larger than the inclination angle θ1 of the introduction flow path 21. Specifically, the inclination angle θ2 of the ascending channel 23 with respect to the horizontal plane is about 70°, and the inclination angle θ1 of the introduction channel 21 with respect to the horizontal plane is about 60°. Thus, in this embodiment, both the inclination angle θ1 of the introduction channel 21 and the inclination angle θ2 of the ascending channel 23 are 45° or more.
In the case of this embodiment, the inclination angles θ1 and θ2 are the inclination angles of the linear portions of the introduction channel 21 and the ascending channel 23. When the introduction channel or the ascending channel is curved, the inclination angles θ1 and θ2 may be determined as the inclination angle of the entire curved region, taking the curved region as an average.

In addition, as shown in FIGS. 7 to 11, in this embodiment, the trap drainage channel 20 is an area extending from the inflow section X, which is the inlet of the introduction channel 21, to the top C, which is the downstream end of the ascending channel 23. In the flow path cross section, the size in the left-right direction is larger than the size in the direction orthogonal to the left-right direction. In this way, by making the size of the channel in the left-right direction larger than the size in the direction orthogonal to the left-right direction, the size of the trap drain channel 20 in the front-rear direction can be increased while securing the channel area of the trap drain channel 20. is suppressed.
In addition, in this embodiment, in the flow path cross section of the area from the region below the reservoir water surface R as an intermediate position of the ascending channel 23 to the top C which is the downstream end of the ascending channel 23, the horizontal direction is The size is larger than the size in the right and left direction. The area near the downstream end of this ascending channel and the area near the downstream end of the introduction channel (upstream end of the ascending channel) are formed so that the size in the direction orthogonal to the left and right direction is larger than in the left and right direction. Good too. Even if the cross section of the flow path in these regions is made larger in the direction perpendicular to the left-right direction than in the left-right direction, the influence on the size of the trap drainage channel in the front-back direction is small. Further, by making the size of the channel cross section of these regions in the direction orthogonal to the left-right direction smaller than the size in the left-right direction, it is possible to contribute to suppressing the size of the trap drainage channel in the vertical direction.

As shown in FIGS. 3 to 5, the first descending channel 25 is continuous with the opening at the downstream end of the ascending channel 23. As shown in FIGS. That is, the lower end of the upstream end of the first descending channel 25 is the lower end of the downstream end of the ascending channel 23, and is the top C of the trap drainage channel 20. The first downward flow path 25 is a flow path having a substantially rectangular cross-sectional shape. The first downward flow path 25 extends rearward. The lower surface of the inner surface, that is, the bottom surface 25A of the first descending flow path 25 is slightly inclined downward toward the downstream side (rearward). As shown in FIGS. 3 to 5, the bottom surface 25A of the first downward flow path 25 is formed as a flat inclined surface. In detail, as shown in FIGS. 10 and 11, the bottom surface 25A is substantially horizontal in the left-right direction, and as shown in FIGS. 3 and 4, the bottom surface 25A is directed rearward with a substantially constant slope It is formed into a planar shape that slopes downward as the height increases.

The downstream end of the first downward flow path 25 is closed toward the rear. As shown in FIG. 5, the inner side surface of the first downward flow path 25 has a substantially constant width W from the upstream end toward the downstream side. Moreover, as shown in FIG. 3, the upper surface 25B of the inner surface of the first downward flow path 25 extends rearward at a substantially constant height. That is, the first downward flow path 25 is formed in such a manner that the vertical width gradually increases from the upstream end toward the downstream side.

As shown in FIGS. 3 to 5 and FIG. 11, the second descending flow path 27 is a flow path having a substantially circular cross-sectional shape. The second downward flow path 27 opens at the downstream end of the bottom surface 25A of the first downward flow path 25. The second downward flow path 27 extends in the vertical direction, and its downstream end opens downward. A drainage socket 70, which will be described later, is connected to the downstream end of the second downward flow path 27.

As shown in FIG. 5, the opening diameter D of the second downward flow path 27 at the bottom surface 25A of the first downward flow path 25 is smaller than the size in the width direction of the bottom surface 25A. In other words, the width W of the bottom surface 25A of the first downward flow path 25 is larger than the opening diameter D of the second downward flow path 27. Further, the passage area of the first downward passage 25 is larger than the passage area of the second downward passage 27.
Further, the opening diameter D of the second downward flow path 27 is smaller than the distance from the front end of the opening of the second downward flow path 27 to the front end of the bottom surface 25A of the first downward flow path 25 (to the top C). In other words, the length L of the bottom surface 25A of the first downward flow path 25 is larger than the opening diameter D of the second downward flow path 27.

As shown in FIG. 3, a heater H1 for preventing freezing is attached to the trap drainage channel 20. The heater H1 is composed of a heating element made of a nichrome wire and an aluminum sheet that generates heat when energized. The heater H1 has a tapered cylindrical shape that opens upward and downward, and is attached so as to wrap around the front outer circumferential surface of the introduction channel 21 and the rear outer circumferential surface of the ascending channel 23. The heater H1 is attached to the trap drain channel 20 in such a manner that a lower end surface 20A of the trap drain channel 20 at a position corresponding to a drain socket 70, which will be described later, is exposed. The outer circumferential surface of the heater H1 is covered with a buffer material H2 having a fireproof function, and the outer circumferential surface of the buffer material H2 and the lower end surface 20A of the trap drainage channel 20 are covered with a dew-proofing material H3 having a heat insulating function. There is. Like the heater H1, the buffer material H2 has a tapered cylindrical shape that opens upward and downward. Therefore, the lower end surface 20A of the trap drainage channel 20 is configured to face the inner surface of the dew-proofing material H3 that covers the outermost part of the trap drainage channel 20.

As shown in FIG. 3, the trap drainage channel 20 extends from the lower end A of the introduction channel 21 (the lower end of the upstream end of the ascending channel 23) to the top C in the shape of the horizontal center cross section of the flush toilet 1. The distance in the front-rear direction is approximately equal to the distance in the front-rear direction from the lower end A to the front end B of the introduction channel 21 .

As shown in FIG. 2, the peripheral wall portion 30 is provided continuously around the toilet bowl portion 10 and the trap drainage channel 20. The space below the toilet bowl part 10 and the trap drainage channel 20 is hidden from view from the outside by this peripheral wall part 30. The peripheral wall portion 30 has a front portion 31 that surrounds the front and sides of the toilet bowl portion 10, and a rear portion 32 that surrounds the lower side and rear portion of the trap drainage channel 20. The front part 31 and the rear part 32 are formed to rise upward from a lower end surface that comes into contact with the floor surface F when installed. The upper end of the front part 31 extends to the upper end of the toilet bowl part 10. As shown in FIGS. 7 to 11, the upper end of the rear portion 32 is connected to the outer wall surface of the trap drainage channel 20 by being abutted from the side. In the introduction channel 21 of the trap drainage channel 20, the upper end of the side portion of the rear portion 32 is curved from the upstream end to the downstream end of the introduction channel 21 in side view, as shown in FIG. In addition, in the ascending channel 23 of the trap drainage channel 20, the upper end of the side part of the rear part 32 extends from the upstream end of the ascending channel 23 to the downstream end of the ascending channel 23 in a side view, as shown in FIG. It rises and extends in a more gently sloping form. Furthermore, in the first descending channel 25 of the trap drainage channel 20, the upper end of the side part of the rear part 32 extends rearward from the upstream end of the first descending channel 25 in a side view, approximately horizontally, as shown in FIG. It is extending.

The water guide section 40 is formed behind the toilet bowl section 10 and above the trap drainage channel 20, as shown in FIGS. 1 to 4. The water guide section 40 is formed surrounded by the rear part of the upper wall section 11 of the toilet bowl section 10, the bottom section 41, the left and right sections 43, the rear section 45, and the top section 47. Cleaning water flows through the water guide section 40 . The water guide portion 40 communicates with the water spout 11A, and supplies flushing water into the toilet bowl portion 10 through the water spout 11A when flushing the toilet bowl is performed.

As shown in FIGS. 3 and 4, the bottom surface portion 41 extends rearward continuously from the lower end of the rear portion of the upper wall portion 11 of the toilet bowl portion 10. The upper surface of the bottom surface portion 41 forms the lower surface 40A of the water guide portion 40. The bottom portion 41 has a center front edge, left and right front edges, left and right edges, and a rear edge when viewed from above. The central front edge is curved along the rear of the upper end of the toilet bowl portion 10. The left and right front edges are inclined rearward from both ends of the center front edge in the left and right outward directions. The left and right edges extend rearward in parallel from the respective outer ends of the left and right front edges. The rear end edge linearly extends and connects the rear ends of both the left and right end edges. The bottom surface portion 41 has a flat plate shape that slopes downward from both left and right edges toward the left and right center portion 41A. That is, the lower surface 40A of the water guiding portion 40 is sloped downward from both left and right edges toward the left and right center portion 41A. Further, the left and right center portions 41A of the bottom portion 41 are slightly inclined downward toward the front. That is, the left and right center portions 41A of the lower surface 40A of the water guiding portion 40 are inclined downwardly toward the front.

As shown in FIGS. 1 and 3, the left and right side portions 43 rise in the vertical direction from the left and right front edges and both left and right edges of the bottom surface portion 41, and slightly expand outward toward the top. Further, the left and right side portions 43 have approximately the same height as the upper wall portion 11 of the toilet bowl portion 10. The front end portions of the left and right side portions 43 are wider in the left and right direction than the left and right ends of the toilet bowl portion 10. The rear surface portion 45 stands up substantially perpendicularly from the rear end edge of the bottom surface portion 41 in the up-down direction. The rear surface portion 45 has an insertion hole 45A formed in the left and right center portions thereof, into which a distribution pipe connected to an outlet of a cleaning tank (not shown) is inserted. The top surface portion 47 has substantially the same shape as the bottom surface portion 41 when viewed from above. The upper surface portion 47 is continuous with the upper end edges of the rear portion of the upper wall portion 11 of the toilet bowl portion 10, the left and right side portions 43, and the rear surface portion 45 so as to close the upper side of the water guide portion 40. The upper surface portion 47 is formed to extend toward the rear of the toilet bowl portion 10. Specifically, the upper surface portion 47 is formed so that the upper surface thereof extends horizontally toward the rear of the toilet bowl portion 10 when the flush toilet bowl 1 is installed.

As shown in FIGS. 1 to 3, the water guide portion 40 is provided with a pair of cylindrical portions 49. As shown in FIGS. The pair of cylindrical portions 49 are formed to connect the top surface portion 47 and the bottom surface portion 41 and extend in the vertical direction. The pair of cylindrical portions 49 are provided at positions symmetrical about the left and right centers. The pair of cylindrical portions 49 are formed with through holes 49A that penetrate through the upper surface of the upper surface portion 47 and the lower surface of the bottom surface portion 41, respectively. The pair of through holes 49A have a predetermined interval. The pair of through holes 49A are attachment holes for fixing a toilet seat device disposed on the upper surface portion 47. The distance between the pair of through holes 49A from the front end of the flush toilet bowl 1 is approximately 470 mm as defined by Japanese Industrial Standards (JIS).

As shown in FIG. 3, the pair of through holes 49A are located further back than the top C of the trap drainage channel 20. In other words, the trap drain channel 20 has a top C, which is the lower end of the downstream end of the ascending flow channel 23, in front of a pair of through holes 49A for fixing a toilet seat device (not shown). It is formed in the form of a position. More specifically, as shown in FIG. 3, the top portion C is located between the pair of through holes 49A and the rear end of the upper wall portion 11 of the toilet bowl portion 10 in the front-rear direction.

The tank installation part 50 is provided on the rear upper surface of the flush toilet bowl 1. A cleaning tank (not shown) in which cleaning water is stored is installed in the tank installation section 50 . The tank installation portion 50 is formed in a concave shape. In the tank installation part 50, a distribution pipe connected to the outlet of the cleaning tank is inserted through the insertion hole 45A of the rear part 45 and arranged.

The water guide section 40 communicates with the trap drainage channel 20 through a drain passage 60. Specifically, as shown in FIGS. 1 and 3, the drain passage 60 connects the toilet bowl from the inlet 61 that opens to the lower surface 40A of the water guide section 40 (the upper surface of the bottom surface section 41 forming the water guide section 40). It is formed below the reservoir water surface R of the section 10 and continues to the outlet 63 which opens at the upper part of the introduction channel 21 of the trap drainage channel 20 . The water drain passage 60 allows the wash water in the water guide part 40 to flow directly into the trap drainage channel 20 without going through the toilet bowl part 10. The water draining passage 60 prevents the washing water from flowing into the toilet bowl part 10 when the force of the washing water becomes weak to some extent in the final stage of toilet bowl washing when the water is discharged from the water guide part 40. This suppresses the generation of streak-like limescale formed by a small amount of washing water flowing down the surface of the toilet bowl portion 10.

As shown in FIG. 3, a drain socket 70 is connected to the lower end of the second downward flow path 27. The drain socket 70 is arranged in the inner space of the peripheral wall portion 30 and is not visible from the outside. The drain socket 70 connects the discharge port 27A of the second downward flow path 27 and the drain pipe P that is pulled out to the floor surface F and located below the toilet bowl part 10 in the installed state. As described above, the lower end surface 20A of the trap drain channel 20 is formed at a height that allows the drain socket 70 to be accommodated therein. The drain socket 70 passes below the thus formed trap drain channel 20 and extends forward.

As shown in FIG. 3, the drain socket 70 includes a packing 71, an inflow pipe section 72, and an outflow pipe section 73. The packing 71 is fitted into the lower end of the second downward flow path 27 from above, and seals the outer peripheral surface of the second downward flow path 27 watertightly. The inflow pipe portion 72 has one end opened upward and connected to the lower end of the packing 71 . The other end of the inflow pipe section 72 is provided with a horizontal section 72A that extends forward and approximately horizontally along the floor surface F. One end of the outflow pipe section 73 opens rearward, into which the horizontal section 72A of the inflow pipe section 72 is inserted, and the other end extends downward and is inserted into the drain pipe P on the floor F. The horizontal portion 72A of the inflow pipe portion 72 has a uniform cross-sectional shape, and can be cut to a desired length and inserted into the outflow pipe portion 73 for connection. The drain socket 70 can be adjusted to correspond to the distance between the second descending channel 27 on the toilet side and the drain pipe P on the floor F side by adjusting the length of the horizontal part 72A of the inflow pipe part 72. It is being done.

Next, the installation work of the flush toilet 1 will be explained. First, the drain socket 70 is connected to the drain pipe P drawn out to the floor surface F (see FIG. 3). Specifically, the outflow pipe portion 73 of the drain socket 70 is fitted and fixed to the drain pipe P on the floor surface F. At this time, the length of the horizontal portion 72A is adjusted so that the center of the opening of the packing 71 of the drain socket 70 is located at a predetermined position from the wall surface Y at the rear of the flush toilet bowl 1 (approximately 160 mm from the wall surface Y). Then, the second descending passage 27 of the flush toilet bowl 1 is connected to the packing 71 of the drain socket 70. Specifically, the flush toilet 1 is lifted up and placed on the floor F so that the second descending channel 27 is inserted and connected from above the packing 71.
The drain socket 70 can accommodate a distance from the rear wall Y of the flush toilet bowl 1 to the center of the drain pipe P (drain core) of about 200 mm to 550 mm. The flush toilet bowl 1 is suitable as a toilet bowl to be used as a replacement for an existing toilet bowl that was installed before the current standardization of 200 mm drainage cores.

In the flush toilet bowl 1 having such a configuration, when flushing the toilet bowl, flush water flows from the water guide section 40 through the toilet bowl section 10 into the trap drainage channel 20. In the trap drainage channel 20, the cleaning water descends through the introduction channel 21, ascends through the ascending channel 23, washes away dirt, and flows down in the order of the first descending channel 25 and the second descending channel 27. A drain socket 70 that communicates with a drain pipe P on the floor surface F is connected to the discharge port 27A of the second downward flow path 27, and the wash water is discharged to the drain pipe P through this drain socket 70.

As described above, the flush toilet 1 of the first embodiment includes the toilet bowl portion 10, the upper surface portion 47, and the trap drainage channel 20. A trap drainage channel 20 communicates with the toilet bowl portion 10 on its downstream side. The upper surface part 47 extends to the rear of the toilet bowl part 10, and is formed with a pair of through holes 49A, which are a pair of attachment holes that penetrate in the vertical direction and to which a toilet seat device (not shown) is attached. The trap drainage channel 20 has an introduction channel 21 and an ascending channel 23. The introduction channel 21 is formed to communicate with the downstream side of the toilet bowl portion 10 and extend downward. The rising flow path 23 is formed to extend upward continuously from the downstream end of the introduction flow path 21 . The top C of the trap drainage channel 20, which is the lower end of the downstream end of the ascending flow channel 23, is located forward of the pair of through holes 49A.

In this way, in the flush toilet bowl 1, the top C of the trap drainage channel 20 is located forward of the pair of through holes 49A, which are the attachment holes of the toilet seat device. That is, the top C is set at a position closer to the front of the flush toilet bowl 1. Thereby, the length of the trap drainage channel 20 in the front-rear direction can be suppressed. As a result, it is possible to improve the degree of freedom in designing the configuration downstream of the ascending channel of the trap drainage channel.

Therefore, the flush toilet 1 of Example 1 can improve the degree of freedom in designing the space at the rear of the toilet.

Further, the inclination angle θ2 of the ascending flow path 23 is made larger than the inclination angle θ1 of the introduction flow path 21. Therefore, it is possible to easily realize a flush toilet bowl 1 in which the length of the trap drainage channel 20 in the front and back direction is suppressed.

Further, the trap drainage channel 20 is formed in such a manner that the distance in the longitudinal direction from the lower end A to the top C of the introduction channel 21 is approximately the same as the distance in the longitudinal direction from the lower end A to the front end B of the introduction channel 21. has been done. By doing this, in the trap drainage channel 20, the upward slope of the upward flow channel 23 is made larger. As a result, in the flush toilet bowl 1, the position of the top C of the trap drainage channel 20 is set closer to the front. As a result, in the flush toilet bowl 1, the size of the trap drain channel 20 in the front-rear direction is suppressed, and the degree of freedom in designing the trap drain channel 20 downstream of the ascending channel 23 is improved. Therefore, the flush toilet bowl 1 can be more easily miniaturized.
Note that the trap drainage channel has a form in which the distance in the longitudinal direction from the lower end of the introduction channel (the lower end of the upstream end of the ascending channel) to the top is smaller than the distance in the longitudinal direction from the lower end of the introduction channel to the front end. It may be formed of. In this case, the size of the trap drainage channel in the front-rear direction can be further suppressed.

In addition, the trap drainage channel 20 is arranged in the left-right direction in the channel cross section of the region from the inlet X, which is the entrance of the introduction channel 21, to the top C, which includes the position below the reservoir surface R of the ascending channel 23. The size is larger than the size in the direction perpendicular to the left-right direction. Therefore, it is possible to easily realize a flushing toilet bowl in which not only the size of the trap drainage channel in the front-back direction but also the size in the vertical direction is suppressed.

Further, the trap drainage channel 20 has first and second descending channels 25 and 27 as descending channels that are formed to extend downward continuously from the downstream end of the ascending channel 23. In the trap drainage channel 20, the discharge port 27A of the second downward flow channel 27 opens downward, thereby forming an S trap. The flush toilet bowl 1 has a drain socket 70 connected to the discharge port 27A of the second downward passage 27 and the drain pipe P that is pulled out to the floor surface F and located below the toilet bowl section 10 when installed. We are prepared. In this way, even if the distance from the back wall of the flush toilet to the drain core is long, such as when the drain pipe is located below the toilet bowl, the flush toilet can be placed in an appropriate position near the wall. can be installed.

Further, the trap drainage channel 20 has a lower end surface 20A having a height that allows the drainage socket 70 to be accommodated. For this reason, the drain socket 70 that connects the second descending channel 27 at the rear of the flush toilet 1 and the drain pipe P located below the toilet bowl section 10 at the front of the flush toilet 1 can be arranged without difficulty. can do.

Further, a freeze prevention heater H1 is attached to the trap drain channel 20 and is formed with an opening such that the lower end surface 20A of the trap drain channel 20 at a position corresponding to the drain socket 70 is exposed. For this reason, the position of the lower end surface 20A of the trap drainage channel 20 can be formed closer to the floor surface F compared to a trap drainage channel in which a heater is attached to cover the lower end surface.

Further, the top C of the trap drainage channel 20 is located between the pair of through holes 49A and the rear end of the upper wall portion 11 of the toilet bowl portion 10 in the front-rear direction. Thereby, the degree of freedom in designing the rear portion of the toilet bowl can be improved without affecting the shape of the bowl surface of the toilet bowl portion 10, and miniaturization can be easily achieved. For example, when the top C in FIG. 3 is located in front of the rear end of the upper wall 11 of the toilet bowl 10, the ascending channel 23 of the trap drainage channel 20 is located between the intermediate wall 15 and the lower wall 17 of the toilet bowl 10. It will interfere with the rear part of the In this case, the inclination angle of the rear portion of the toilet bowl portion 10 may be affected, or a sufficient flow path area of the ascending flow path 23 may not be ensured. However, since the top portion C is located further back than the rear end of the upper wall portion 11 of the toilet bowl portion 10, it may affect the shape of the bowl surface of the toilet bowl portion 10, or it may not be possible to secure a sufficient flow path area. Miniaturization can be achieved without any problems.

<Example 2>
Next, Example 2 will be described with reference to FIG. 12 and the like.
In the flush toilet bowl 201 of the second embodiment shown in FIG. 12, the shapes of the toilet bowl portion 10, the introduction channel 21, and the ascending channel 23 are the same as those of the flush toilet bowl 1 of the first embodiment. In other words, the flush toilet bowl 201 has the same shape in front of the top C of the trap drainage channel 220 as the flush toilet bowl 1 of the first embodiment. Further, the flushing toilet bowl 201 includes an upper surface portion 47 similar to that of the first embodiment, and the top portion C of the trap drainage channel 220 is located forward of the pair of through holes 49A. However, the flushing toilet 201 includes a trap drain channel 220 having a descending channel 229 connected to the downstream end of the ascending channel 23 instead of the first descending channel 25 and the second descending channel 27 of the first embodiment. This embodiment differs from the first embodiment in that In other configurations, the same components as in Example 1 are given the same reference numerals, and detailed explanations are omitted.

As shown in FIG. 12, the descending channel 229 is connected to the downstream end of the ascending channel 23 and descends while being curved. The discharge port 229A, which is the downstream end of the descending flow path 229, opens obliquely downward toward the rear. That is, in the flushing toilet bowl 201, the trap drainage channel 220 forms a P-trap in which the discharge port 229A of the downward flow channel 229 faces backward and diagonally downward. The downstream end of the trap drain channel 220 is connected to an above-floor drain pipe P2 provided so as to protrude obliquely forward and upward from the rear wall surface Y of the flush toilet bowl 201.

The length, height, inclination angle, etc. of the above-floor drain pipe P2 are determined by standards. Specifically, the above-floor drain pipe P2 projects horizontally forward at a height of 148 mm from the floor surface F, and its front end extends obliquely upward at an angle of about 10 degrees with respect to the horizontal plane. There is. The length of the above-floor drain pipe P2 from the wall surface Y is about 175 mm, and the height of the front end extending at an angle from the floor surface F is about 170 mm.

To connect the flush toilet 201 to the floor drain pipe P2, while lifting the flush toilet 201 slightly upwards, insert the outlet 229A of the descending channel 229 into the tip of the floor drain pipe P2, and then connect the flush toilet 201 to the floor drain pipe P2. 201 is placed on the floor F. The flush toilet 201 installed in this manner can be installed at a distance from the front end to the rear wall Y that is equivalent to that of the flush toilet 1 of the first embodiment described above.

In this way, in the flush toilet bowl 201, similarly to the first embodiment, the top C of the trap drain channel 220 is located forward of the pair of through holes 49A, which are the mounting holes of the toilet seat device. . On the other hand, the flush toilet 201 has a configuration on the downstream side of the ascending passage 23 that is different from that of the flush toilet 1 of the first embodiment, and realizes connection to the floor drain pipe P2. It is realized that the distance from the rear wall surface Y to the front end is the same as that of the flush toilet bowl 1 of the first embodiment. That is, the flush toilet bowl 1 of Example 1 and the flush toilet bowl 201 of Example 2 have the top C disposed in front of the pair of through holes 49A. Since the configuration on the downstream side of the top portion C has a degree of freedom in design, it is possible to configure an S trap or a P trap, respectively.

Further, in the flush toilet bowl 201, the trap drainage channel 220 has a distance in the longitudinal direction from the lower end A of the introduction channel 21 to the top C than the distance in the longitudinal direction from the lower end A to the front end B of the introduction channel 21. It is formed smaller. In this way, by setting the top C of the trap drainage channel 220 at a position closer to the front, it is possible to more easily achieve downsizing.

Further, the trap drainage channel 220 has a descending channel 229 that is continuous with the downstream end of the ascending channel 23 and extends rearward and diagonally downward. In the trap drainage channel 220, the discharge port 229A of the downward flow channel 229 opens toward the rear to form a P trap. In the flush toilet bowl 201, the discharge port 229A of the downward passage 229 is connected to an above-floor drain pipe P2 provided protruding from the rear wall surface Y. In this way, the flush toilet 201 can be connected to the above-floor drain pipe P2 and installed at an appropriate position from the rear wall surface Y.

The present invention is not limited to the embodiments illustrated in the above description and drawings, but the following embodiments are also included within the technical scope of the present invention.
(1) In Examples 1 and 2, a flushing type flushing toilet was illustrated, but the flushing type toilet according to the present invention may be of a siphon type. Further, the flush toilet according to the present invention is not limited to a floor-standing toilet, but may be a wall-mounted toilet.
(2) In Examples 1 and 2, a configuration including a tank installation part in which a cleaning tank is installed was illustrated, but it is not essential to provide a tank installation part in the flush toilet according to the present invention. That is, the flush toilet according to the present invention may be of a so-called tankless type, such as a configuration in which flush water is supplied directly from the water supply piping by opening and closing a flush valve or an on-off valve. part is not required.
(3) In Examples 1 and 2, a configuration including a water guide section having a specific configuration was illustrated, but the configuration of the water guide section is not limited to the configuration of Example 1 or 2.
(4) In Examples 1 and 2, a configuration including a water drain passage was illustrated, but the water drain passage is not an essential configuration in the flush toilet bowl according to the present invention.
(5) In Examples 1 and 2, a configuration including a peripheral wall portion was illustrated, but the peripheral wall portion is not an essential configuration in the flush toilet according to the present invention. When the peripheral wall portion is provided, it is not limited to the form of Embodiment 1 or 2, and other forms may be used, such as a form that entirely covers the flush toilet up to the upper end.
(6) In Examples 1 and 2, the width of the bottom surface of the first downward flow path is larger than the opening diameter of the second downward flow path, but this is not essential. In the flush toilet bowl according to the present invention, the width of the bottom surface of the first downward flow path and the opening diameter of the second downward flow path may be formed to have substantially the same size.
(7) In Examples 1 and 2, the length of the bottom surface of the first downward flow path is larger than the opening diameter of the second downward flow path, but this is not essential. In the flush toilet according to the present invention, the length of the bottom surface of the first descending channel may be formed smaller than the opening diameter of the second descending channel, or the length of the bottom surface of the first descending channel and the length of the bottom surface of the first descending channel may be smaller than the opening diameter of the second descending channel. The opening diameters of the two downward flow channels may be formed to have substantially the same size.
(8) Example 1 exemplifies a configuration that includes a drain outlet of a descending flow path and a drain socket that is connected to a drain pipe that is pulled out to the floor and located below the toilet bowl when installed. However, if a drain socket is provided, its form is not limited to the form of the first embodiment. For example, as shown in FIG. 13, when the flush toilet 301 is installed, the drain pipe P3 located below the descending flow path (second descending flow path 27) and the outlet of the descending flow path (the second descending flow path Other forms of drain sockets may be used, such as a drain socket 370 that connects the outlet 27A) of the channel 27.

DESCRIPTION OF SYMBOLS 1,201,301...Washing toilet bowl 10...Toilet bowl portion 20,220...Trap drain channel 20A...Lower end surface of trap drain channel 21...Introduction flow channel 23...Rising flow channel 25,27,229...Descent flow channel (25 ...first descending flow path, 27...second descending flow path)
27A, 229A...Descent flow path outlet 47...Top surface part 49A...Through hole (toilet seat device installation hole)
70, 370...Drainage socket A...Lower end of introduction channel B...Front end of introduction channel C...Top of trap drainage channel F...Floor surface H1...Heater P, P3...Drain pipe

Claims (9)

A toilet bowl part,
an upper surface portion formed with a mounting hole extending rearward of the toilet bowl portion and penetrating in the vertical direction to which a toilet seat device is attached;
A trap drainage having an introduction channel formed to communicate with the downstream side of the toilet bowl portion and extending downward and rearward, and an ascending channel formed to extend continuously and upward from the downstream end of the introduction channel. road and
It is equipped with
The top of the trap drainage channel, which is the lower end of the downstream end of the ascending flow channel, is located forward of the attachment hole,
The flush toilet bowl is provided with an inclined surface portion that slopes downward and rearward on the upper surface of the inner surface of the introduction channel . The flush toilet according to claim 1, wherein the inclination angle of the ascending flow path is larger than the inclination angle of the introduction flow path. The trap drainage channel has a longitudinal distance from the lower end of the ascending channel to the top thereof that is approximately equal to a longitudinal distance from the lower end of the introduction channel to the front end of the introduction channel, or The flush toilet bowl according to claim 1 or 2, wherein the flush toilet bowl is formed in a form that is smaller than the distance in the front-rear direction from the lower end of the passage to the front end of the introduction passage. The trap drainage channel is formed so that the size in the left-right direction is larger than the size in the direction orthogonal to the left-right direction in a flow path cross section of a region from the entrance of the introduction flow path to a midway position of the rising flow path. The flush toilet bowl according to any one of claims 1 to 3. The trap drainage channel has a descending channel formed to extend downward continuously from the downstream end of the ascending channel,
Any one of claims 1 to 4, wherein the trap drainage channel can form an S trap in which the outlet of the descending flow channel opens facing downward, or a P trap opening facing backward. The flush toilet described in . the trap drainage path forming the S-trap;
6. The flush toilet bowl according to claim 5, further comprising a drain socket connected to the discharge port of the descending flow path and a drain pipe located below the toilet bowl part when pulled out to the floor surface and installed. 7. The flush toilet according to claim 6, wherein the trap drain has a lower end surface having a height that allows the drain socket to be accommodated. 8. The flush toilet bowl according to claim 7, wherein an anti-freeze heater is attached to the trap drain channel, the anti-freezing heater being formed with an opening such that the lower end surface at a position corresponding to the drain socket is exposed. The flushing system according to any one of claims 1 to 8, wherein the introduction channel has an upstream end that is continuous with an inflow part of the trap drainage channel formed in the bottom wall of the toilet bowl part. toilet bowl.

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