JP2022097731A - Flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet bowl that can improve design of a toilet bowl body while maintaining washability and cleanability of the toilet bowl body with a simpler configuration.

SOLUTION: A flush toilet bowl that washes a toilet bowl body with washing water comprises: a bowl part that has a bowl-shaped filth receiving surface and a rim part that is formed along an upper edge of the filth receiving surface so that an inner peripheral surface thereof rises in a vertical direction; a water discharge port that forms a swirling flow by discharging the washing water into the bowl part; and a conduit that supplies the washing water to the water discharge port, wherein a throttle flow channel is formed at a downstream end part of the conduit, the water discharge port is a horizontally long opening, and a latter half part of the bowl part is formed in front of a position where an angle between a straight line along a front-back direction of the bowl part and a perpendicular line to a tangent at the center of a width of the water discharge port on a curve representing the inner peripheral surface of the rim part is 45 degrees in a top view.

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a flush toilet that cleans the toilet body with wash water.

Conventionally, a bowl portion having a bowl-shaped filth receiving surface and a rim portion formed along the upper edge portion of the filth receiving surface, and a first discharge portion that discharges wash water into the bowl portion to form a swirling flow. A flush toilet equipped with a water outlet and a second spout is known (see, for example, Patent Document 1). In the flush toilet described in Patent Document 1, the inner peripheral surface of the rim portion is formed by a flat surface extending in a substantially vertical direction. That is, the inner peripheral surface of the rim portion is not overhanging. Therefore, the cleanability of the bowl portion is improved as compared with the flush toilet bowl in which the rim portion is overhanging.

Further, in the flush toilet described in Patent Document 1, the first spout is located toward the rear of one side of a line extending in the front-rear direction through the center of the bowl portion, and the second spout is located. , On the downstream side of the region where the radius of curvature of the rim portion is small on the other side of the front side of the line extending in the front-rear direction of the bowl portion, which is the region where the wash water discharged from the first spout is most likely to scatter. It is located in the area where the radius of curvature becomes large. Therefore, the washing water discharged from the first spout is guided by the washing water discharged from the second spout. As a result, it is possible to prevent the washing water discharged from the first water discharge port from scattering beyond the rim portion.
Further, since the first spout located at the rear of the bowl portion has a horizontally flat opening, it is possible to eliminate the upward flow component of the washing water discharged from the first spout as much as possible. can. As a result, even when the inner peripheral surface of the rim portion is formed by a flat surface extending in a substantially vertical direction, that is, even when the inner peripheral surface of the rim portion is not overhanged, the first spout is used. It more effectively suppresses the spouted washing water from scattering beyond the rim portion.

Japanese Unexamined Patent Publication No. 2012-20703

However, in the above-mentioned conventional flush toilet, since the first spout is formed at the rear of the bowl portion, the first spout and the user standing on the front side of the flush toilet face each other. become. In other words, the first spout is formed on the rear side of the bowl portion, which is a position easily visible to the user standing on the front side of the flush toilet. Therefore, there is a concern that the design of the flush toilet will deteriorate.

The present invention has been made to solve the above-mentioned problems, and to provide a flush toilet that can improve the design of the toilet body while maintaining the cleanability and cleanability of the toilet body. The purpose.

In order to achieve the above object, according to the flush toilet according to one aspect of the present invention, the flush toilet is a flush toilet that cleans the toilet body with washing water, and is on a bowl-shaped filth receiving surface and a filth receiving surface. A bowl portion having a rim portion formed along the edge portion and formed so that the inner peripheral surface thereof rises in the vertical direction, a spout for discharging wash water into the bowl portion to form a swirling flow, and a discharge port. It is equipped with a headrace that supplies wash water to the water outlet, a throttle flow path is formed at the downstream end of the headrace, and the spout is a horizontally long opening. The straight line along the front-back direction of the bowl part and the vertical line with respect to the tangent line at the center position of the width of the spout on the curve representing the inner peripheral surface of the rim part are formed in front of the position where the angle formed by 45 degrees. Has been done.

According to this configuration, in the latter half of the bowl portion, a vertical line is formed between the left and right center lines of the bowl portion and the tangent line at the center position of the width of the spout on the curve representing the inner peripheral surface of the rim portion in the upper view. The spout is formed in front of the position where the angle is 45 degrees. As a result, the width dimension that can be visually recognized by the user can be suppressed, and it becomes difficult for the user to visually recognize the spout. Therefore, the design of the toilet bowl body can be improved.
Further, since the throttle flow path is formed at the downstream end of the headrace, the flow of the spouting water can be regulated while improving the momentum of the water spouting from the spouting port. In addition, since the spout has a horizontally long opening, it is possible to suppress the upward flow component of the washing water discharged from the spout. Therefore, even in the highly cleanable rim portion formed so that the inner peripheral surface rises in the vertical direction, the swirlability of the swirling flow formed in the bowl portion can be improved.
In this way, it is possible to improve the design of the toilet bowl body while maintaining the cleanability and cleanability of the toilet bowl body.

Further, in the flush toilet according to one aspect of the present invention, the size of the spout in the vertical direction is preferably smaller on the front side than on the rear side.

According to this configuration, the size of the spout in the vertical direction is smaller on the front side than on the rear side, so that the spout on the front side is located farther from the headrace (position on the downstream side). The cross section of the flow path is narrower than the cross section of the flow path of the spout on the rear side. As a result, the water discharged from the spout port flows vigorously in the tangential direction of the inner peripheral edge of the rim portion. Therefore, it is possible to satisfactorily generate a swirling flow in the bowl portion while suppressing the washing water from scattering beyond the rim portion.

Further, in the flush toilet according to one aspect of the present invention, preferably, a straightening vane whose plate surface extending along the flow direction is vertically oriented is provided at the downstream end of the headrace.

According to this configuration, a straightening vane whose plate surface extending along the flow direction is vertically oriented is provided at the downstream end of the headrace, so that the flow of water discharged from the spout is regulated. Can be done. This makes it possible to stabilize the flow of water discharged from the spout. Therefore, it is possible to satisfactorily generate a swirling flow in the bowl portion while suppressing the washing water from scattering beyond the rim portion.

Further, the flush toilet according to one aspect of the present invention preferably includes a distributor that discharges wash water from the wash water source to the headrace.

According to this configuration, since the distributor for guiding the washing water from the washing water source to the headrace and discharging the washing water is provided, the shape of the washing toilet bowl from the washing water source to the spout can be made simpler. Therefore, the mold for manufacturing the flush toilet can be simplified, and the productivity of the flush toilet can be improved.
Further, by providing the distributor, the flow of the washing water discharged from the spout can be further stabilized. Therefore, it is possible to satisfactorily generate a swirling flow in the bowl portion while further suppressing the washing water from scattering beyond the rim portion.

According to the present invention, in a flush toilet, the design of the toilet body can be improved while maintaining the cleanability and cleanability of the toilet body.

It is a top view of the flush toilet bowl which concerns on 1st Embodiment of this invention. It is sectional drawing seen along the line II-II of FIG. It is sectional drawing seen along the line III-III of FIG. It is explanatory drawing about the position of the spout which concerns on 1st Embodiment of this invention. It is explanatory drawing of the spout which concerns on 1st Embodiment of this invention. (A) It is a figure when the opening of the spout which concerns on 1st Embodiment of this invention is seen from the front. (B) It is a figure when the opening of the spout according to the 1st Embodiment of this invention is seen from the direction facing the opening of a spout. It is a schematic diagram which showed the flow of water of the flush toilet which concerns on 1st Embodiment of this invention. It is a top sectional view of the flush toilet bowl which concerns on 2nd Embodiment of this invention. It is a front sectional view of the flush toilet bowl which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.

(First Embodiment)
<Composition of flush toilet>
First, the flush toilet according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. In the following, the directions shown in the drawings will be used for explanation.

FIG. 1 is a top view of a flush toilet according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG.

As shown in FIGS. 1 and 2, the flush toilet bowl 1 includes a toilet bowl body 2 made of pottery or the like, and a tank device 4 as a flush water source. The tank device 4 is placed above the rear side of the toilet bowl main body 2 and is connected to a water supply source (not shown) such as a water supply. When the operation lever, remote controller (not shown), or the like of the tank device 4 is operated, the tank device 4 is washed from the discharge port (not shown) to the supply port 6 opened on the upper surface on the center rear side of the toilet body 2. Water is supplied.
In this embodiment, the tank device 4 functions as a water supply device.

A bowl portion 8 for discharging filth and the like is formed on the front side of the toilet bowl main body 2, and a water reservoir portion 10 is formed below the bowl portion 8. A predetermined amount of pooled water is formed in the pooled water portion 10. The water level W0 shown in FIG. 2 is the initial water level of the accumulated water. An inlet 12a of a drain trap pipeline 12 for discharging filth and the like to the outside of the flush toilet 1 is connected to the lower end of the water reservoir 10. The drain trap pipeline 12 extends rearward from its inlet 12a, and its outlet 12b is connected to a drain pipe (not shown) installed on the floor surface.

The bowl portion 8 has a substantially egg shape as a whole when viewed from above. The bowl portion 8 has a substantially symmetrical outer shape in the left-right direction. Further, the bowl portion 8 has a bowl-shaped filth receiving surface 14 and a rim portion 16 formed along the upper edge portion of the filth receiving surface 14.

The filth receiving surface 14 is formed in a mortar shape so as to gradually spread from the lower edge portion to the upper edge portion. In other words, the dirt receiving surface 14 is formed so as to gradually expand from the lower edge portion to the upper edge portion in the vertical cross section.

The rim portion 16 is formed in an annular shape along the upper edge portion of the dirt receiving surface 14, and the inner peripheral surface thereof is formed so as to rise in the vertical direction. That is, the inner peripheral surface of the rim portion 16 is formed by a flat surface extending substantially vertically from the upper edge portion of the dirt receiving surface 14 without overhanging toward the inside of the bowl portion 8 over the entire circumference. .. Therefore, compared to the case where the inner peripheral surface of the rim portion is overhanging, the blind spot range to which dirt adheres can be reduced, and the cleanability when cleaning the inner peripheral surface of the rim portion 16 is improved. Can be made to.

Further, a toilet seat (not shown) is placed above the rim portion 16. This toilet seat is provided in an annular shape along the rim portion 16. Further, in the top view, the inner peripheral edge of the toilet seat protrudes in the shape of an eave from the inner peripheral surface of the rim portion 16 to the inside of the bowl portion 8 over substantially the entire circumference.
The entire circumference of the inner peripheral edge of the toilet seat does not have to protrude from the inner peripheral surface of the rim portion 16 to the inside of the bowl portion 8, and the inner peripheral edge of the toilet seat near the upper part of the spout 18 described later is the rim portion 16. It suffices if it protrudes in the shape of an eave from the inner peripheral surface to the inside of the bowl portion 8.
Further, a toilet lid (not shown) may be provided above the toilet seat.

As shown in FIG. 3, wash water is discharged to the bowl portion 8 on the inner peripheral surface of the rim portion 16 in the latter half of the bowl portion 8, which is a portion rearward from the center of the bowl portion 8 in the top view. A spout 18 that forms a swirling flow is opened in the filth receiving surface 14. The spout 18 is a horizontally long opening, that is, a horizontally long flat opening. Further, the spout port formed on the inner peripheral surface of the rim portion 16 is only the spout port 18. That is, the spout that discharges the washing water into the bowl portion 8 to form a swirling flow on the filth receiving surface 14 is only one hole of the spout 18.
The position where the spout 18 is open will be described in detail later.

A headrace 20 for supplying wash water to the spout 18 is formed in the upper part on the rear side of the toilet body 2. The headrace 20 is a flow path extending forward from the supply port 6 and connects the supply port 6 and the water discharge port 18. Further, the bottom surface of the flow path of the headrace 20 is inclined downward from the supply port 6 toward the water discharge port 18 side (front side). Further, in order to prevent water from remaining in the headrace 20, the water is inclined downward from the inner end of the blind channel formed by the outer edge of the bottom surface of the headrace 20 and the partition wall toward the spout 18. The bottom surface of the flow path at the downstream end of the headrace 20 is formed at the lowest height position among the bottom surfaces of the flow path of the headrace 20. The washing water flowing from the tank device 4 to the supply port 6 flows to the water discharge port 18 through the headrace 20.

Further, at the downstream end of the headrace 20, a throttle flow path 22 is formed in which the cross-sectional area of the flow path is narrowed from the upstream to the downstream. In the present embodiment, the throttle flow path 22 is a flow path in which the width of the flow path in the horizontal direction is narrowed, and is formed on the downstream side of the straightening vane 24 described later.
The throttle flow path 22 may be formed so as to narrow the flow path width in the vertical direction or other directions instead of the flow path width in the horizontal direction. Further, the flow path width may be narrowed not only in a single direction but also in a plurality of directions.

Further, at the downstream end of the headrace 20, a straightening vane 24 whose plate surface extending along the flow direction is vertically oriented is provided. The straightening vane 24 is a plate-shaped portion extending from the rear end of the spout 18 toward the inside of the headrace 20. As shown in FIG. 3, in a plan sectional view, the downstream side of the straightening vane 24 is connected to the rear edge of the spout 18 and has an acute-angled shape together with the peripheral wall surface forming the rear edge of the spout 18. Form the corners of. The washing water flowing through the headrace 20 is guided to the spout 18 by the straightening vane 24. Further, the upper end and the lower end of the straightening vane 24 are continuously formed on the upper surface and the bottom surface forming the flow path of the headrace 20. That is, the straightening vane 24 is provided as a part of the toilet bowl main body 2.

<About the spout>
Next, with reference to FIGS. 4 to 6, the spout according to the first embodiment of the present invention will be described in detail.

FIG. 4 is an explanatory diagram of the position of the spout according to the first embodiment of the present invention. FIG. 5 is an explanatory diagram of a spout according to the first embodiment of the present invention. FIG. 6A is a front view of the opening of the spout according to the first embodiment of the present invention when viewed from the front. FIG. 6B is a front view of the spout opening according to the first embodiment of the present invention when viewed from the direction facing the spout opening.

4 and 5 are cross-sectional views taken along the line III-III of FIG.
Further, in FIG. 4 showing a top view of the flush urinal 1, the central position of the bowl portion 8 is C1, the central position of the width of the spout 18 is C2, and the central position of the bowl portion 8 is a straight line along the front-rear direction. The left and right center lines) are L, the tangent line at the center position C2 of the width of the spout 18 on the curve representing the inner peripheral surface of the rim portion 16 is P, the perpendicular line to the tangent line P is T, and the perpendicular line T and the left and right center lines L are formed. The angle is indicated by R. Here, the central position C1 of the bowl portion 8 is a point at a substantially intermediate position of the line connecting the front end and the rear end of the inner peripheral surface of the rim portion 16.
Further, in FIGS. 5 and 6, the width of the spout 18 when viewed from the front (front of the flush toilet 1) is B1, and the spout 18 is in the direction along the vertical line T (positive to the spout 18). The width of the spout 18 when viewed from the opposite direction) is indicated by B2.
Further, in FIG. 6, the opening area of the spout 18 when the spout 18 is viewed from the front is shown by S1, and the opening area of the spout 18 when the spout 18 is viewed from the direction along the perpendicular line T is shown by S2. There is. That is, the opening area S1 is the apparent opening area of the spout 18 in the forward view, and the opening area S2 is the substantial opening area of the spout 18.

As shown in FIGS. 4 and 5, the spout 18 is located in the latter half of the bowl portion 8 (the portion rearward of the center position C1 of the bowl portion 8), and the left and right center lines L of the bowl portion 8 are viewed from above. And, it is formed in front of the position where the angle R formed by the perpendicular line T with respect to the tangent line P at the center position C2 of the width of the water discharge port 18 on the curve representing the inner peripheral surface of the rim portion 16 is 45 degrees. In the present embodiment, the spout 18 is formed at a position where the angle R formed by the left and right center lines L and the vertical line T is 45 degrees in the top view.

Further, in the vertical size of the spout 18, the front side is formed smaller than the rear side. Specifically, the spout 18 is formed so that the vertical length of the opening thereof gradually decreases from the rear side to the front side (see FIG. 6). In the present embodiment, the spout 18 is open to the right side of the rim portion 16 in the latter half of the bowl portion 8, and the length in the vertical direction is on the left side (right side in FIGS. 6A and 6B). It gradually shortens from the right side (the left side of the same). Further, the spout 18 has a substantially horizontal trapezoidal shape and has a substantially symmetrical shape in the vertical direction. Therefore, the spout 18 has a long side portion on the rear side, a short side portion on the front side, and an upper and lower hypotenuse portions as side portions forming the opening.
Further, the spout 18 is formed so that the lower end of the spout 18 is in contact with the upper edge of the filth receiving surface 14 (the boundary between the filth receiving surface 14 and the rim portion 16). Therefore, the washing water can be evenly discharged from the water discharge port 18 to the dirt receiving surface 14. Further, since the spout 18 is opened on the inner peripheral surface of the rim portion 16 rising in the vertical direction, the spout 18 can be obscured from the top view, and the design can be improved.

Here, since the spout 18 is formed at a position where the angle R is 45 degrees in the top view, the size of the width of the spout 18 when the spout 18 is viewed from the front and the opening of the spout 18 The size of the width of the spout 18 when the spout 18 is viewed from the opposite direction (direction along the vertical line T) is different. Specifically, the width B1 of the spout 18 when the spout 18 is viewed from the front is larger than the width B2 when the spout 18 is viewed from the direction facing (facing) the opening of the spout 18. Is smaller. More specifically, since the spout 18 is formed at a position where the angle R is 45 degrees in the top view, the ratio of the sizes of B1 and B2 is roughly "B1: B2 = 1: 1.4 (root). 2 equivalent) ”.

Further, as shown in FIG. 6, the direction when the spout 18 is viewed from the front and the direction when the spout 18 is viewed from the direction facing the opening of the spout 18 are both directions on the horizontal plane. Therefore, the length of the spout 18 in the vertical direction does not substantially change between when viewed from the front and when viewed from the direction facing the opening of the spout 18. Therefore, the ratio of the opening area S1 of the spout 18 when the spout 18 is viewed from the front and the opening area S2 when the spout 18 is viewed from the direction facing the opening of the spout 18 is the spout 18. It depends on the ratio of the size of the width, that is, the ratio of the size of the width B1 and the width B2. As described above, since the ratio of the sizes of the width B1 and the width B2 is approximately "B1: B2 = 1: 1.4", the ratio of the opening area S1 and the opening area S2 of the spout 18 is approximately. , "S1: S2 = 1: 1.4". In other words, the opening area S1 of the spout 18 when the spout 18 is viewed from the front is about 70% as compared with the opening area S2 when the spout 18 is viewed from the direction facing the opening of the spout 18. It becomes the size of.

As described above, the opening area S1 of the spout 18 when the spout 18 is viewed from the front is larger than the opening area S2 of the spout 18 when the spout 18 is viewed from the direction facing the opening of the spout 18. small. Here, assuming that the spout is formed at the rear end of the rim portion 16, the opening area of the spout when the spout is viewed from the front is the same as the opening area S2 of the spout 18. .. That is, when the spout 18 formed at a position where the angle R is 45 degrees in the top view is viewed from the front, as compared with the case where the spout formed at the rear end of the rim portion 16 is viewed from the front. The spout looks smaller.
Further, in the latter half of the bowl portion 8, the more the position of the spout 18 is in front of the position where the angle R between the left and right center lines L and the vertical line T is 45 degrees in the top view, the more the spout is projected forward. The opening area S1 of the water outlet 18 becomes smaller, that is, the spout 18 looks smaller when viewed from the front.

In the present embodiment, the case where the position of the spout 18 is a position where the angle R between the left and right center lines L and the vertical line T is 45 degrees in the top view has been described, but in view of higher design, the spout is discharged. It is more preferable that the position of the water port 18 is on the front side of the position where the angle R formed by the left and right center line L and the vertical line T is 60 degrees in the top view.
When the spout 18 is formed at a position where the angle R is 60 degrees in the top view, the width B1 of the spout 18 when the spout 18 is viewed from the front and the direction facing the opening of the spout 18 The ratio of the width of the spout 18 when the spout 18 is viewed is "B1: B2 = 1: 2". Therefore, the ratio of the opening area S1 of the spout 18 when the spout 18 is viewed from the front and the opening area S2 of the spout 18 when the spout 18 is viewed from the direction facing the opening of the spout 18 is approximate. , "S1: S2 = 1: 2". In other words, the opening area S1 of the spout 18 when the spout 18 is viewed from the front is larger than the opening area S2 of the spout 18 when the spout 18 is viewed from the direction facing the opening of the spout 18. , About 50% in size.
As described above, if the position of the spout 18 is on the front side of the position where the angle R is 60 degrees, the opening area S1 of the spout 18 when the spout 18 is viewed from the front is the opening of the spout 18. Since the size is less than half the opening area S2 of the spouting port 18 when the spouting port 18 is viewed from the direction facing the water spouting port 18, it is more preferable from the viewpoint of obtaining high designability.

<Operation and action>
Next, with reference to FIG. 7, the operation and operation of the flush toilet according to the first embodiment of the present invention will be described.

FIG. 7 is a schematic view showing the flow of water in the flush toilet according to the first embodiment of the present invention.
Note that FIG. 6 is a cross-sectional view taken along the line III-III of FIG.

As shown in FIG. 7, the washing water discharged from the tank device 4 to the supply port 6 of the toilet bowl main body 2 flows into the headrace 20. The wash water that has flowed into the headrace 20 from the supply port 6 flows forward toward the spout port 18. At this time, since the straightening vane 24 is provided at the downstream end of the headrace 20, the washing water flowing through the headrace 20 flows while being guided toward the spout 18 by the straightening vane 24.
As described above, since the straightening vane 24 whose plate surface extending along the flow direction is vertically oriented is provided at the downstream end of the headrace 20, it is possible to collect the water flow to the spout 18. It is possible to direct the flow of water discharged from the spout 18. As a result, the flow of water discharged from the water discharge port 18 can be stabilized. Therefore, even when the inner peripheral surface of the rim portion 16 is formed so as to rise in the vertical direction, the washing water is swirled into the bowl portion 8 while suppressing the washing water from scattering beyond the rim portion 16. The flow can be generated well.

Further, since the throttle flow path 22 is formed at the downstream end of the headrace 20, the washing water flowing toward the water discharge port 18 becomes a stable flow, and the momentum of the washing water is improved. Then, the washing water having improved water vigor through the throttle flow path 22 is discharged from the spout 18 to the bowl portion 8, and the washing water discharged from the spout port 18 forms a swirling flow in the bowl portion 8.
In this way, since the throttle flow path 22 is formed at the downstream end of the headrace 20, the flow of the water discharge can be regulated while improving the momentum of the washing water discharged from the water discharge port 18. In addition, since the spout 18 is a horizontally long opening, it is possible to suppress the upward flow component of the washing water spouted from the spout 18. Therefore, even when the inner peripheral surface of the rim portion 16 is formed so as to rise in the vertical direction as in the present embodiment, the washing water is suppressed from being scattered beyond the rim portion 16. , The swirling property of the swirling flow formed in the bowl portion 8 can be improved. Further, even when the spout 18 formed on the inner peripheral surface of the rim portion 16 is a single hole as in the present embodiment, the washing water is scattered beyond the rim portion 16 by the throttle flow path 22. It is possible to improve the swirling property of the swirling flow formed in the bowl portion 8 while suppressing the swirling.

Further, in the size of the vertical opening of the spout 18, the front side is formed smaller than the rear side, so that the front side is a position farther from the headrace 20 (a position on the downstream side). The cross section of the flow path of the spout 18 of the portion is narrower than the cross section of the flow path of the spout 18 of the rear side portion. As a result, the washing water discharged from the water discharge port 18 to the bowl portion 8 flows vigorously in the tangential direction of the inner peripheral surface of the rim portion 16. Therefore, even when the inner peripheral surface of the rim portion 16 is formed so as to rise in the vertical direction as in the present embodiment, while suppressing the washing water from scattering beyond the rim portion 16. , A swirling flow can be satisfactorily generated in the bowl portion 8.

Further, according to the flush toilet bowl 1 according to the first embodiment of the present invention described above, in the latter half of the bowl portion 8, the left and right center lines L of the bowl portion 8 and the inner peripheral surface of the rim portion 16 are viewed from above. The spout 18 is formed in front of the position where the angle formed by the perpendicular line T with respect to the tangent P at the center position C2 of the width of the spout 18 on the curve representing the above is 45 degrees. As a result, it is possible to suppress the width dimension in which the spout 18 can be visually recognized by the user, and it becomes difficult for the user to visually recognize the spout 18. Therefore, the design of the toilet bowl main body 2 can be improved.
In addition, the spout 18 that discharges wash water into the bowl portion 8 to form a swirling flow can form a sufficient swirling flow with only one hole, so that the spout 18 extends from the supply port 6 to the spout 18. The flow path, for example, the headrace 20 can be easily configured. Therefore, the structure of the toilet bowl main body 2 can be made simpler. Further, the spout 18 for forming a swirling flow by spouting wash water into the bowl portion 8 has only one hole, that is, since only the spout 18 is provided on the inner peripheral surface of the rim portion 16, the rim is provided. The cleanability of the portion 16 can be further improved.

Further, according to the flush toilet bowl 1 according to the first embodiment of the present invention described above, the toilet seat is placed above the rim portion 16, and the inner peripheral edge of the toilet seat is inside the rim portion 16 in the top view. It protrudes from the peripheral surface to the inside of the bowl portion 8. As a result, when the bowl portion 8 is viewed from above, the toilet seat protruding inward from the inner peripheral surface of the rim portion 16 hides the spout 18 provided on the inner peripheral surface of the rim portion 16 in the shadow of the toilet seat. That is, for example, when a user standing on the front side of the flush toilet bowl 1 looks inside the bowl portion 8, the spout 18 provided on the inner peripheral surface of the rim portion 16 becomes difficult to see due to the toilet seat. Therefore, the spout 18 is less likely to be visually recognized by the user, and the design of the flush toilet bowl 1 can be improved.

As described above, according to the flush toilet bowl 1 according to the first embodiment of the present invention described above, the design of the toilet bowl body 2 can be improved while maintaining the cleanability and cleanability of the toilet bowl body 2 with a simpler configuration. Can be improved.

(Second embodiment)
Next, the flush toilet according to the second embodiment of the present invention will be described with reference to FIG.

FIG. 8 is a cross-sectional view of the flush toilet according to the second embodiment of the present invention.
Note that FIG. 8 is a cross-sectional view taken along the line III-III of FIG.

As shown in FIG. 8, the flush toilet bowl 1 according to the second embodiment of the present invention includes a resin distributor 26 that guides the wash water into the headrace 20 from the tank device 4 which is the wash water source and discharges the wash water. ing. The distributor 26 is a tubular member constituting the flow path of the washing water, is provided inside the headrace 20, and has an inlet 26a communicating with the tank device 4 which is a washing water source, and a distributor from the washing water source. It has an outlet 26b for discharging the washing water supplied into the tar 26 to the headrace 20.

The inlet 26a of the distributor 26 is located at the supply port 6 (see FIG. 1), is connected to the discharge port (not shown) of the tank device 4, and communicates with the discharge port of the tank device 4. Further, the outlet 26b of the distributor 26 is open downstream of the straightening vane 24 and upstream of the throttle flow path 22. Therefore, the straightening vane 24 functions as a guide portion for positioning the outlet 26b of the distributor 26. In this way, the distributor 26 is arranged substantially linearly from the supply port 6 facing the discharge port of the tank device 4 toward the throttle flow path 22.

When the supply of the washing water is started from the tank device 4 which is the washing water source, the washing water flows into the inlet 26a of the distributor 26 from the discharge port of the tank device 4. The wash water flowing in from the inlet 26a of the distributor 26 flows through the flow path in the distributor 26 and is discharged from the outlet 26b to the headrace 20. Then, the washing water discharged from the outlet 26b of the distributor 26 to the headrace 20 is discharged from the water discharge port 18 to the bowl portion 8 through the throttle flow path 22.

As described above, since the flush toilet bowl 1 according to the second embodiment includes the distributor 26, in addition to the effects of the first embodiment described above, the flush toilet bowl 1 from the wash water source to the spout 18 For example, the shape of the flow path of the headrace 20 can be made simpler. Therefore, the mold for manufacturing the flush toilet bowl 1 can be simplified, and the productivity of the flush toilet bowl 1 can be improved.
Further, by providing the distributor 26, the flow of water in the headrace 20 can be regulated in the pipeline by the distributor 26. As a result, the flow of the washing water discharged from the water discharge port 18 can be further stabilized. Further, since the distributor 26 is made of a resin having a higher dimensional accuracy than that of pottery, it is possible to suppress the variation in the water discharge flow rate between the flush toilet bowls 1. Therefore, it is possible to satisfactorily generate a swirling flow in the bowl portion 8 while further suppressing the washing water from scattering beyond the rim portion 16.

When the distributor 26 is provided as in the flush toilet 1 according to the second embodiment, the rectifying plate 24 may not be provided.
Further, the flow path of the distributor 26 may be extended, and the outlet 26b of the distributor 26 may be provided at a position substantially coincide with the water discharge port 18. At this time, the throttle flow path 22 may be formed in the flow path inside the distributor 26.
Further, the outlet 26b of the distributor 26 is rectified so that the flow path of the distributor 26 is shortened so that the washing water discharged from the outlet 26b of the distributor 26 is guided to the rectifying plate 24 and flows toward the spout 18. It may be provided upstream of the plate 24.

(Third embodiment)
Next, the flush toilet according to the third embodiment of the present invention will be described with reference to FIG. 9.

FIG. 9 is a cross-sectional view of the flush toilet according to the third embodiment of the present invention.
Note that FIG. 9 is a cross-sectional view taken along the line VI-VI of FIG.

As shown in FIG. 9, the flush toilet bowl 1 according to the third embodiment of the present invention includes a spout cover 28 that conceals the spout 18. The spout cover 28 is provided on the inner peripheral surface of the rim portion 16. Further, the spout cover 28 has a plate-shaped cover main body 28a that covers and conceals the entire spout 18, and a shaft support portion 28b that is an inner peripheral surface of the rim portion 16 and is provided at the upper end of the cover main body 28a. ing. The upper edge portion of the cover body 28a is rotatably supported by the shaft support portion 28b in the opening direction of the spout 18 (direction toward the inside of the rim portion 16) with the lateral direction as the rotation axis direction.

In the state where the washing water is not supplied from the tank device 4, the cover main body 28a is under heavy weight due to the weight of the cover main body 28a, and is attached so as to cover and conceal the spout 18. It is being pushed. Therefore, in a state where the washing water is not supplied from the tank device 4, the spout 18 is concealed and closed by the cover body 28a of the spout cover 28.
The spout cover 28 may be configured to support the cover main body 28a by the shaft support portion 28b so as to urge the cover body 28a toward the inside of the rim portion 16. In this case, for example, a spring or the like is provided on the shaft support portion 28b as a means for urging the cover main body 28a.

Further, when the washing water is supplied from the tank device 4 to the toilet bowl main body 2 and the water flows from the headrace 20 to the spout 18, the momentum of the water flowing from the headrace 20 to the spout 18 causes the shaft branch 28b to be the axis. The cover body 28a rotates toward the inside of the rim portion 16, and the spout 18 is opened. Then, the washing water is discharged from the water discharge port 18 to the bowl portion 8. When the supply of the washing water from the tank device 4 is stopped, the cover main body 28a is brought into a state of being weighted by the weight of the cover main body 28a, and is urged to approach the state of covering and concealing the spout 18 by the cover main body 28a. The spout 18 is concealed and closed.

As described above, since the flush toilet bowl 1 according to the third embodiment includes the spout cover 28 for concealing the spout 18, in addition to the effect of the first embodiment described above, the spout 18 can be more reliably used. Can be concealed. As a result, it becomes difficult for the user to visually recognize the spout 18, and the design of the flush toilet bowl 1 can be further improved.

When the spout cover 28 is provided as in the flush toilet bowl 1 according to the third embodiment, the spout 18 can be more reliably concealed, so that the spout 18 is the bowl portion 8. In the latter half, it does not have to be formed in front of the position where the angle R formed by the left and right center line L and the vertical line T is 45 degrees in the top view. For example, the spout 18 is located behind the position where the angle R between the left and right center lines L and the perpendicular line T is 45 degrees in the latter half of the bowl portion 8 (the side where the angle R is smaller than 45 degrees). ) May be formed.

(Modification example)
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

For example, although the configuration in which the tank device 4 functions as a water supply device has been described, a water supply device other than the tank device 4, such as a flush valve, may be provided.

Further, the reservoir portion 10 or the filth receiving surface 14 may be provided with a Zet spout hole for discharging wash water from the bowl portion 8 to the drain trap pipe line 12 efficiently.

Further, although the configuration in which the straightening vane 24 is provided integrally with the toilet bowl main body 2 has been described, the straightening vane 24 may be configured separately from the toilet bowl main body 2. Further, for example, the straightening vane 24 may be provided so as to stand upright from the bottom surface of the headrace 20.

Further, although the configuration that the angle R is formed by the left-right center line L and the vertical line T of the bowl portion 8 has been described, the angle R does not have to be the angle formed by the left-right center line L and the vertical line T of the bowl portion 8 and is in the front-rear direction. It may be a straight line along the line, that is, an angle formed by a line parallel to the left and right center lines L and a vertical line T.

Further, although the structure in which the distributor 26 is made of resin has been described, it is sufficient that the distributor 26 is made of a material capable of regulating the flow of water in the headrace 20 in the pipeline by the distributor 26.

The elements included in each of the above-described embodiments can be combined as long as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

1 Washing toilet 2 Toilet bowl body 4 Tank device 6 Supply port 8 Bowl part 10 Reservoir part 12 Drain trap pipeline 12a Inlet 12b Outlet 14 Waste receiving surface 16 Rim part 18 Spout port 20 Headrace 22 Squeezing flow path 24 Straightening plate 26 Distributor 26a Inlet 26b Outlet 28 Spout cover 28a Cover body 28b Shaft branch B1, B2 Width of spout projected forward C1 Central position of bowl C2 Central position of spout width L Left and right center line P tangent line R angle S1 , S2 Opening area of the spout projected forward T Vertical line W0 Initial water level

Claims (4)

A flush toilet that cleans the body of the toilet with wash water.
A bowl portion having a bowl-shaped filth receiving surface and a rim portion formed along the upper edge portion of the filth receiving surface so that the inner peripheral surface thereof rises in the vertical direction.
A spout that forms a swirling flow by spouting wash water into the bowl,
A headrace for supplying washing water to the spout is provided.
A throttle flow path is formed at the downstream end of the headrace.
The spout is a horizontally long opening, and in the latter half of the bowl portion, the spout is on a straight line along the front-rear direction of the bowl portion and a curved line representing the inner peripheral surface of the rim portion. A flush toilet that is formed in front of the position where the angle between the vertical line and the tangent line at the center position of the width of the bowl is 45 degrees. The flush toilet according to claim 1, wherein the vertical size of the spout is smaller on the front side than on the rear side. The flush toilet according to claim 1 or 2, wherein a straightening vane whose plate surface extending along the flow direction is vertically oriented is provided at the downstream end of the headrace. The flush toilet according to any one of claims 1 to 3, further comprising a distributor for discharging wash water from the wash water source to the headrace.

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