Washing toilet

Abstract

The present invention is a jet siphon type flush toilet for discharging flush water from a rim spout port and a jet spout port at different timings, the flush toilet comprising: a bowl part provided with a dirt receiving surface, a rim part, a ceiling surface, and a pot part; a rim spouting port provided in the rim portion and spouting wash water along the inner peripheral surface of the rim portion; and a jet spout port that is provided below the bowl portion and that spouts flush water toward the inlet of the drain bend line, the radius of curvature of the front end portion of the pot portion being formed so as to be smaller than the radius of curvature of the inner peripheral surface of the inner edge portion of the front end portion of the bowl portion in a plan view.

Description

Technical Field

[0001] The present invention relates to a flushing toilet bowl. Background Art

[0002] Conventionally, as shown in Patent Document 1 and Patent Document 2, there is known a jet siphon type flushing toilet bowl that discharges washing water from an inner edge water discharge port and a jet water discharge port at different times and discharges dirt by generating a siphon action. Such a jet siphon type flushing toilet bowl is formed to have a larger water accumulation surface area than, for example, a straight-through type flushing toilet bowl. Therefore, the pot portion forming the water accumulation surface is formed to have a large radius of curvature at its front end portion.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-12995;

[0006] Patent Document 2: Japanese Patent Application Laid-Open No. 2020-26681. Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] However, in the flushing toilet bowls shown in Patent Document 1 and Patent Document 2, since the radius of curvature of the front end portion of the pot portion is formed large, the washing water discharged from the inner edge water discharge port and flowing down while swirling on the dirt receiving surface violently impacts the water accumulation surface when flowing into the pot portion. Since the washing water that violently impacts the water accumulation surface suffers energy loss and its water potential becomes weak, the dirt sinking into the accumulated water cannot be moved. There is a problem that if jet water discharge is performed in this state, it may not be possible to sufficiently discharge the dirt.

[0009] Therefore, the present invention is proposed to solve the above problems, and its object is to provide a flushing toilet bowl capable of improving the dirt discharge performance.

[0010] Means for Solving the Problems

[0011] In order to achieve the above object, the present invention provides a jet siphon type flushing toilet that discharges flushing water from an inner edge water discharge port and a jet water discharge port at different times, and has: a basin part, which includes: a basin-shaped dirt receiving surface; an inner edge part, which is formed above the dirt receiving surface; a shelf surface, which is formed between the dirt receiving surface and the inner edge part; and a pot part, which is formed below the dirt receiving surface and has a water accumulation surface formed inside it; a drain pipe, whose inlet is connected to the lower part of the basin part and is used to discharge dirt; an inner edge water discharge port, which is arranged on the inner edge part and discharges flushing water along the inner peripheral surface of the inner edge part; and a jet water discharge port, which is arranged below the basin part and discharges flushing water towards the inlet of the drain pipe. The radius of curvature of the front end part of the pot part is formed to be smaller than the radius of curvature of the inner peripheral surface of the inner edge part of the front end part of the basin part in a top view.

[0012] In the present invention configured as described above, since the radius of curvature of the front end part of the pot part is formed to be smaller than the radius of curvature of the inner peripheral surface of the inner edge part of the front end part of the basin part in a top view, the flushing water discharged from the inner edge water discharge port can smoothly flow into the water accumulation surface. As a result, the energy of the flushing water can be effectively transferred to the water accumulation surface, and the dirt in the accumulated water can be moved. As a result, the dirt can be sufficiently discharged by jet water discharge.

[0013] In the present invention, it is preferable that after discharging the flushing water from the inner edge water discharge port, the flushing water is discharged from the jet water discharge port.

[0014] In the present invention configured as described above, since the flushing water is discharged from the jet water discharge port after discharging the flushing water from the inner edge water discharge port, the flushing water can be discharged from the jet water discharge port after moving the dirt that has sunk into the accumulated water by the flushing water discharged from the inner edge water discharge port.

[0015] In addition, in the present invention, it is preferable that after the flushing water discharged from the inner edge water discharge port flows into the water accumulation surface, the flushing water is discharged from the jet water discharge port.

[0016] In the present invention configured as described above, since the flushing water is discharged from the jet water discharge port after the flushing water discharged from the inner edge water discharge port flows into the water accumulation surface, the flushing water can be discharged from the jet water discharge port after moving the dirt that has sunk into the accumulated water by the flushing water discharged from the inner edge water discharge port.

[0017] In the present invention, it is preferable that during the discharge of the flushing water from the jet water discharge port, the flushing water is continuously discharged from the inner edge water discharge port.

[0018] In the present invention configured as described above, since the flushing water is continuously discharged from the inner edge water discharge port during the discharge of the flushing water from the jet water discharge port, the dirt that has sunk into the accumulated water can be moved while discharging the flushing water from the jet water discharge port.

[0019] In addition, in the present invention, preferably, the dirt receiving surface is formed such that the inclination angle that slopes downward toward the center of the basin portion reaches a minimum in the front region.

[0020] In the present invention configured in this way, since the dirt receiving surface is formed such that the inclination angle that slopes downward toward the center of the basin portion reaches a minimum in the front region, the washing water discharged from the inner edge water outlet can smoothly flow into the water accumulation surface from the front region of the dirt receiving surface.

[0021] In the present invention, preferably, at the front end portion of the basin portion, in a plan view, the radius of curvature of the inner peripheral surface of the inner edge portion is formed to be larger than the radius of curvature of the outer contour of the toilet main body.

[0022] In the present invention configured in this way, since at the front end portion of the basin portion, in a plan view, the radius of curvature of the inner peripheral surface of the inner edge portion is formed to be larger than the radius of curvature of the outer contour of the toilet main body, even if the outer contour of the toilet main body is formed with a small radius of curvature, it is possible to suppress energy loss of the washing water flowing through the inner peripheral surface of the inner edge portion at the front end portion of the basin portion. Therefore, it is possible to suppress energy loss of the washing water flowing through the inner peripheral surface of the inner edge portion, and thus sufficiently wash the entire basin portion.

[0023] In addition, in the present invention, preferably, in a plan view, the front end portion of the basin portion is formed with the smallest radius of curvature on the inner peripheral surface of the inner edge portion, and the radius of curvature at a position more rearward than the front end portion of the basin portion is formed to be larger than the smallest radius of curvature.

[0024] In the present invention configured in this way, since in a plan view, the front end portion of the basin portion is formed with the smallest radius of curvature on the inner peripheral surface of the inner edge portion, and the radius of curvature at a position more rearward than the front end portion of the basin portion is formed to be larger than the smallest radius of curvature, it is possible to suppress energy loss of the washing water flowing through the inner peripheral surface of the inner edge portion at the front end portion of the basin portion, and thus sufficiently wash the entire basin portion.

[0025] In the present invention, preferably, at the front end portion of the basin portion, in a plan view, the radius of curvature of the lower end portion of the inner peripheral surface of the inner edge portion is formed to be larger than the radius of curvature of the outer contour of the toilet main body, and the radius of curvature at a position more upward than the lower end portion is formed to be substantially the same size as the radius of curvature of the outer contour of the toilet main body.

[0026] In the present invention configured in this way, since at the front end portion of the basin portion, the radius of curvature of the lower end portion of the inner peripheral surface of the inner edge portion is formed to be larger than the radius of curvature of the outer contour of the toilet main body, it is possible to suppress energy loss of the washing water flowing through the inner peripheral surface of the inner edge portion at the front end portion of the basin portion. In addition, since the inner peripheral surface of the inner edge portion is formed such that the radius of curvature at a position more upward than the lower end portion is substantially the same size as the radius of curvature of the outer contour of the toilet main body, it is possible to easily manufacture the toilet main body.

[0027] In addition, in the present invention, preferably, the basin part has a shelf surface which is formed between the dirt receiving surface and the inner edge part and where the washing water discharged from the inner edge water outlet swirls, and the radius of curvature of the front end part of the dirt receiving surface is formed to be larger than the radius of curvature of the inner peripheral surface of the inner edge part of the front end part of the basin part in a plan view.

[0028] In the present invention configured as described above, since the basin part has a shelf surface which is formed between the dirt receiving surface and the inner edge part and where the washing water discharged from the inner edge water outlet swirls, and the radius of curvature of the front end part of the dirt receiving surface is formed to be larger than the radius of curvature of the inner peripheral surface of the inner edge part of the front end part of the basin part in a plan view, the washing water swirling on the shelf surface can flow smoothly onto the dirt receiving surface.

[0029] In the present invention, preferably, in a plan view, the inner edge water outlet is arranged at a position more rearward than the position where the width of the dirt receiving surface in the left - right direction reaches the maximum.

[0030] In the present invention configured as described above, since in a plan view, the inner edge water outlet is arranged at a position more rearward than the position where the width of the dirt receiving surface in the left - right direction reaches the maximum, the distance from the inner edge water outlet to the front end part of the basin part can be made longer. As a result, many areas can be washed by the washing water in a high - energy state before energy loss occurs due to the front end part of the basin part. Therefore, in a water - washing toilet that uses the washing water supplied by the water supply pressure of a water pipe to wash the toilet bowl, the washing performance of the basin part can be improved.

[0031] In addition, in the present invention, preferably, the dirt receiving surface is formed in a concave shape that is recessed downward in its front area.

[0032] In the present invention configured as described above, since the dirt receiving surface is formed in a concave shape that is recessed downward in its front area, the washing water can flow down from the front area of the dirt receiving surface.

[0033] In the present invention, preferably, the dirt receiving surface is formed in a convex shape that protrudes upward in the area more rearward than the inner edge water outlet.

[0034] In the present invention configured as described above, since the dirt receiving surface is formed in a convex shape that protrudes upward in the area more rearward than the inner edge water outlet, in the area on the rear side where the water potential of the washing water becomes weak, the washing water can flow onto the convex - shaped dirt receiving surface and flow through the rear - side area.

[0035] In addition, in the present invention, preferably, the dirt receiving surface is formed in a convex shape that protrudes upward in the area more rearward than the front area.

[0036] In the present invention configured in this way, since the dirt receiving surface is formed in a convex shape protruding upward in a region on the rear side rather than the front region, it is possible to cause the washing water to flow onto the convex dirt receiving surface and spread over the entire dirt receiving surface.

[0037] In the present invention, preferably, the inner peripheral surface of the inner edge portion is formed to protrude inward in the upward direction, and the amount of protrusion of the inner peripheral surface of the inner edge portion is formed to be maximum at the front end portion of the basin portion.

[0038] In the present invention configured in this way, since the inner peripheral surface of the inner edge portion is formed to protrude inward in the upward direction and the amount of protrusion of the inner peripheral surface of the inner edge portion is formed to be maximum at the front end portion of the basin portion, it is possible to prevent the splashing of the washing water at the front end portion of the basin portion.

[0039] In addition, in the present invention, preferably, the inner peripheral surface of the inner edge portion is formed to be inclined inward in the upward direction, and the inclination angle of the inner peripheral surface of the inner edge portion inclined inward with respect to the vertical direction is formed to be maximum at the front end portion of the basin portion.

[0040] In the present invention configured in this way, since the inner peripheral surface of the inner edge portion is formed to be inclined inward in the upward direction and the inclination angle of the inner peripheral surface of the inner edge portion inclined inward with respect to the vertical direction is formed to be maximum at the front end portion of the basin portion, it is possible to prevent the splashing of the washing water at the front end portion of the basin portion.

[0041] Effects of the Invention

[0042] The water-washing toilet according to the present invention can improve the discharge performance of dirt. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a top cross-sectional view of the water-washing toilet showing an embodiment of the present invention;

[0044] Figure 2 is along Figure 1 side cross-sectional view when viewed along line II-II;

[0045] Figure 3 is a top view of the state where the upper inner edge is removed from the trunk of the water-washing toilet of the embodiment of the present invention;

[0046] Figure 4 is a perspective view of the state where the upper inner edge is removed from the trunk of the water-washing toilet of the embodiment of the present invention;

[0047] Figure 5A is along Figure 1 cross-sectional view when viewed along line VA-VA;

[0048] Figure 5B is along Figure 1Cross-sectional view when observing along the VB-VB line;

[0049] Figure 5C is the cross-sectional view when observing along Figure 1 the VC-VC line;

[0050] Figure 6A is the cross-sectional view when observing along Figure 1 the VIA-VIA line;

[0051] Figure 6B is the cross-sectional view when observing along Figure 1 the VIB-VIB line;

[0052] Figure 7 is a diagram for explaining the flushing operation of the water-washing toilet of the present invention;

[0053] Figure 8 is a diagram for explaining the flushing situation of the basin part in the water-washing toilet of the present invention. Detailed Embodiment

[0054] Hereinafter, with reference to the drawings, the water-washing toilet of the embodiment of the present invention will be described.

[0055] First, with reference to Figure 1 and Figure 2 the basic structure of the water-washing toilet 1 of the embodiment of the present invention will be described. Figure 1 is a top cross-sectional view showing the water-washing toilet of the embodiment of the present invention, Figure 2 is the side cross-sectional view when observing along Figure 1 the II-II line.

[0056] It should be noted that in this specification, the front side of the water-washing toilet when observed from the user is defined as the front side, the inner side as the rear side, the right side as the right side, and the left side as the left side for the description.

[0057] As Figure 1 and Figure 2 shown, the water-washing toilet 1 of the embodiment of the present invention is a jet siphon type water-washing toilet, which generates a siphon effect through jet water discharge, so as to discharge the dirt in the basin part from the drain pipe to the outside.

[0058] It should be noted that the water-washing toilet 1 of the embodiment of the present invention is a jet siphon type water-washing toilet, but it can also be a straight-through toilet that flushes dirt through the flowing water effect generated by the water level difference in the basin part, or a siphon type water-washing toilet that generates a siphon effect through inner-edge water discharge and discharges the dirt in the basin part from the drain pipe to the outside.

[0059] The flushing toilet 1 includes: a toilet bowl main body 2 made of pottery; a toilet seat and a toilet lid (not shown) made of resin, which are arranged on the upper surface of the toilet bowl main body 2; and a water storage tank 4, which is arranged at the upper rear part of the toilet bowl main body 2 and is covered by a lid (not shown) made of resin.

[0060] The toilet bowl main body 2 is formed with: a basin part 6 for receiving dirt; a drain bend pipe 8 provided at the bottom of the basin part 6 and used for discharging dirt by siphon action; an inner edge water spout 10 for inner edge water spraying; an inner edge water guiding path 12 for supplying washing water to the inner edge water spout 10; a jet water spout 14 for jet water spraying; and a jet water guiding path 16 for supplying washing water to the jet water spout 14.

[0061] The basin part 6 includes: a basin-shaped dirt receiving surface 18; an inner edge part 20 formed along the upper edge part of the basin part 6; and a shelf surface 21 formed between the dirt receiving surface 18 and the inner edge part 20. In addition, the basin part 6 includes a pot part 22 formed in the area below the dirt receiving surface 18 and connected to the drain bend pipe 8. A water accumulation surface W is formed inside the pot part 22.

[0062] The drain bend pipe 8 includes: an inlet part 8a; an ascending pipe 8b extending upward from the inlet part 8a; a descending pipe 8c extending downward from the ascending pipe 8b; and a top part 8d located between the descending pipe 8c and the ascending pipe 8b and defining the water accumulation level. The lower end of the descending pipe 8c of the drain bend pipe 8 is connected to a drain pipe (not shown) via a drain socket (not shown).

[0063] When observing the toilet bowl main body 2 from the front, only one inner edge water spout 10 (water spout) is formed at the left rear of the inner edge part 20. The inner edge water spout 10 ejects washing water forward, and the washing water swirls on the inner peripheral surface 20a and the shelf surface 21 of the inner edge part 20 and then flows down to the dirt receiving surface 18 to wash the dirt receiving surface 18.

[0064] In a top view, the inner edge water guiding path 12 is formed in a tapered shape with the cross-sectional area of the flow path gradually decreasing towards the inner edge water spout 10. The upstream side of the inner edge water guiding path 12 is connected to a water supply hose 13 directly connected to a water supply pipe. Washing water is supplied from the water supply pipe to the inner edge water guiding path 12, and the washing water is ejected from the inner edge water spout 10 by the water supply pressure of the water supply pipe.

[0065] The jet water spout 14 is formed at the bottom of the basin part 6. The jet water spout 14 is disposed opposite to the inlet part 8a of the drain bend pipe 8 and faces the inlet part 8a of the drain bend pipe 8. The jet water spout 14 ejects washing water towards the inlet part 8a of the drain bend pipe 8, and the washing water flows into the drain bend pipe 8 to start the siphon action.

[0066] The injection water guide path 16 extends forward from the water storage tank 4, then bends, and then extends backward. One end of the injection water guide path 16 is connected to the drain port 4a of the water storage tank 4, and the other end is connected to the injection spout 14. The washing water is supplied from the water storage tank 4 to the injection water guide path 16, and the washing water is discharged from the injection spout 14 by the head pressure of the washing water.

[0067] The water storage tank 4 is a gravity-fed water tank that stores the washing water for injection and supplies it to the injection spout 14. The water storage tank 4 is a small resin water tank. The water storage tank 4 has a volume of about 3 liters, and the amount of washing water discharged from the water storage tank 4 in one washing is about 2 liters.

[0068] In the water storage tank 4, there are provided: a water supply device 24 that supplies washing water to the water storage tank 4; a drainage device 26 that supplies or stops supplying the washing water stored in the water storage tank 4 to the injection water guide path 16; and a float switch 28 that detects a state where the water level of the washing water in the water storage tank 4 reaches the full water level. In addition, outside the water storage tank 4, there are provided: a controller (not shown) that controls the water supply device 24 and the drainage device 26 to drive or stop based on the operation signal of the user; and an operation unit (not shown) that sends an operation signal in response to the operation of the user.

[0069] The water supply device 24 includes: a constant flow valve (not shown) connected to the water supply pipe; an inner edge side solenoid valve 23 that supplies or stops supplying washing water to the inner edge spout 10; and a water tank side solenoid valve 27 that supplies or stops supplying washing water to the water tank water supply port 25 disposed in the water storage tank 4. The inner edge side solenoid valve 23 and the water tank side solenoid valve 27 are configured to be driven by the command of the controller based on the operation signal of the user and the water level detection signal of the float switch 28.

[0070] The drainage device 26 includes: an overflow pipe 30 that discharges the overflow water in the water storage tank 4 to the toilet main body 2; a drain valve 32 fixed to the lower end of the overflow pipe 30; and a toilet washing unit 36 that moves the overflow pipe 30 up and down by an electric driving force to open or close the drain valve 32. The toilet washing unit 36 is configured to be driven by the command of the controller based on the operation signal of the user.

[0071] The controller is configured to be electrically connected to the operation unit, the float switch 28, the inner edge side solenoid valve 23, the water tank side solenoid valve 27, and the toilet washing unit 36, and is capable of receiving and sending various signals. The controller is configured to receive the washing start signal of large washing or small washing from the operation unit, and drive or stop the inner edge side solenoid valve 23, the water tank side solenoid valve 27, and the toilet washing unit 36 based on the pre-stored washing sequence.

[0072] The flushing toilet 1 according to an embodiment of the present invention is set such that, during large flushing, the flushing water volume is approximately 4.8 liters, and during small flushing, the flushing water volume is approximately 3.8 liters.

[0073] Next, with reference to Figure 2 FIGS. 5 to 6, the structure of the basin portion 6 of the flushing toilet 1 according to an embodiment of the present invention will be described in detail.

[0074] Figure 3 is a plan view of a state in which the upper inner edge is removed from the trunk portion of the flushing toilet according to an embodiment of the present invention, Figure 4 is a perspective view of a state in which the upper inner edge is removed from the trunk portion of the flushing toilet according to an embodiment of the present invention, Figures 5A to 5C is along Figure 1 The cross-sectional view when observing along the VA-VA line to the VC-VC line of Figures 6A to 6B is along Figure 1 The cross-sectional view when observing along the VIA-VIA line to the VIB-VIB line of Figures 5A to 5C is a cross-sectional view of a line that extends radially centering on the center O of the basin portion 6.

[0075] First, as Figure 2 shown, the lower end portion 20b of the inner peripheral surface 20a of the inner edge portion 20 is connected to the ceiling surface 21. In addition, an adhesive portion 20c is provided on the inner peripheral surface 20a of the inner edge portion 20, and the adhesively formed upper inner edge 40 and the trunk portion 42 are bonded during toilet manufacturing. The adhesive portion 20c is disposed near the center in the vertical direction of the inner edge portion 20 at the front end portion 6a of the basin portion 6 (see Figure 2 ). The inner peripheral surface 20a of the inner edge portion 20 is configured to extend upward and outward from the lower end portion 20b to the adhesive portion 20c, and to extend upward and inward from the adhesive portion 20c to the upper end portion 20d.

[0076] Next, as Figure 3 shown, the outer contour 7 of the toilet body 2 is formed such that, at the front end portion 6a of the basin portion 6, the radius of curvature R1 in the plan view is smaller than the radius of curvature of the outer contour 7 of the rear side of the toilet body 2. The radius of curvature R1 of the front end portion of the outer contour 7 of the toilet body 2 is formed by the smallest radius of curvature in the outer contour 7 of the toilet body 2. Thus, the flushing toilet 1 has an appearance design with a relatively pointed front end in the outer contour 7 of the toilet body 2.

[0077] As Figure 3 and Figure 4 shown, in the plan view, the lower end portion 20b of the inner peripheral surface 20a of the inner edge portion 20 is formed by the smallest radius of curvature R2 in the inner peripheral surface 20a of the inner edge portion 20 at the front end portion 6a of the basin portion 6 (see Figure 3region S1). The left front portion 6b and the right front portion 6c on the rear side of the front end portion 6a of the pelvic portion 6 are formed by a radius of curvature R3 (>R2) larger than the minimum radius of curvature R2 (see Figure 3 regions S2 and S3). The left side portion 6d and the right side portion 6e on the rear side of the left front portion 6b and the right front portion 6c of the pelvic portion 6 are formed by the maximum radius of curvature R4 (>R3) (see Figure 3 regions S4 and S5). In addition, the radii of curvature R2 to R4 of the lower end portion 20b of the inner edge portion 20 are formed to be larger than the radius of curvature R1 of the front end portion of the outer contour 7 of the toilet body 2 (R2 to R4 > R1). Thereby, it is possible to suppress the energy loss of the washing water flowing through the inner peripheral surface 20a of the inner edge portion 20 of the front end portion 6a of the pelvic portion 6.

[0078] As Figure 3 and Figure 4 shown, an adhesive portion 20c is provided above the lower end portion 20b of the inner peripheral surface 20a of the inner edge portion 20, and the adhesive portion 20c bonds the separately formed upper inner edge portion 40 and the trunk portion 42 during toilet manufacturing. In a plan view, the adhesive portion 20c of the inner edge portion 20 is formed by a radius of curvature R5 (<R2) smaller than the radius of curvature R2 of the lower end portion 20b of the inner edge portion 20 at the front end portion 6a of the pelvic portion 6. The radius of curvature R5 of the adhesive portion 20c of the inner edge portion 20 is formed to be approximately the same size as the radius of curvature R1 of the front end portion of the outer contour 7 of the toilet body 2 (R5 = R1). In this way, the radius of curvature R2 of the lower end portion 20b of the inner edge portion 20 is formed to be larger than the radius of curvature R1 of the front end portion of the outer contour 7 of the toilet body 2, so that the washing water swirling on the inner peripheral surface 20a of the inner edge portion 20 at the front end portion 6a of the pelvic portion 6 does not cause energy loss. On the other hand, since the radius of curvature R5 of the adhesive portion 20c of the inner edge portion 20 is formed to be approximately the same size as the radius of curvature R1 of the front end portion of the outer contour 7 of the toilet body 2, when manufacturing the wash toilet 1, it is possible to easily bond the separately formed upper inner edge portion 40 and the trunk portion 42, and thus, it is possible to easily manufacture the toilet body 2.

[0079] As Figure 3 shown, the front end portion 18a of the dirt receiving surface 18 is formed by a radius of curvature R6. The radius of curvature R6 of the front end portion 18a of the dirt receiving surface 18 is formed to be larger than the radius of curvature R2 of the lower end portion 20b of the inner edge portion 20 at the front end portion 6a of the pelvic portion 6 (R6 > R2). Thereby, the washing water swirling on the ceiling surface 21 smoothly flows down to the dirt receiving surface 18.

[0080] It should be noted that, in the embodiment of the present invention, the radius of curvature R6 of the front end portion 18a of the dirt receiving surface 18 is formed to be larger than the radius of curvature R2 of the lower end portion 20b of the inner edge portion 20 of the front end portion 6a of the basin portion 6. However, it may also be formed to have the same size as the radius of curvature R2 of the lower end portion 20b of the inner edge portion 20.

[0081] As Figure 3 shown, the front end portion 22a of the kettle portion 22 is formed by a radius of curvature R7. The radius of curvature R7 of the front end portion 22a of the kettle portion 22 is formed to be smaller than the radius of curvature R1 of the front end portion of the outer contour 7 of the toilet body 2, the radius of curvature R2 of the lower end portion 20b of the inner edge portion 20, and the radius of curvature R6 of the front end portion 18a of the dirt receiving surface 18 (R7 < R1, R2, R6). Thereby, the washing water smoothly flows into the water accumulation surface W.

[0082] As Figure 1 shown, in a top view perspective, the inner edge water outlet 10 is disposed at a position more rearward than the position X1 where the width of the dirt receiving surface 18 of the basin portion 6 is the largest in the left - right direction. Further, in a top view perspective, the inner edge water outlet 10 is disposed at a position more rearward than the position X2 where the width of the water accumulation surface W is the largest in the left - right direction. Thereby, the distance from the inner edge water outlet 10 to the front end portion 6a of the basin portion 6 is relatively long.

[0083] Next, as Figure 2 shown, the dirt receiving surface 18 forms a concave shape that is recessed downward in its front region. Thereby, although the washing water is difficult to flow down due to a large centrifugal force in the front region of the dirt receiving surface, the washing water can still flow down from the front region of the dirt receiving surface.

[0084] As Figures 5A to 5C shown, the dirt receiving surface 18 is formed in a convex shape that protrudes upward in a region more rearward than the front region of the dirt receiving surface 18 (refer to Figures 5A to 5C ). Thereby, the washing water flowing through the inner peripheral surface 20a of the inner edge portion 20 of the front end portion 6a of the basin portion 6 reaches the convex - shaped dirt receiving surface 18 and spreads over the entire dirt receiving surface 18.

[0085] As Figure 5B and Figure 5C shown, the dirt receiving surface 18 is formed in a convex shape that protrudes upward in a region more rearward than the inner edge water outlet 10 (refer to Figure 5B and Figure 5C ). Thereby, in the region on the rear side where the water potential of the washing water becomes weaker, the washing water reaches the convex - shaped dirt receiving surface 18 and spreads over the region more rearward than the inner edge water outlet 10.

[0086] As Figure 2 and Figures 5A to 5CAs shown, the inclination angle (the inclination angle downward with respect to the horizontal direction) of the dirt receiving surface 18 sloping downward toward the center O of the basin portion 6 is formed to be the smallest in the front region of the dirt receiving surface 18. In other words, the inclination angle of the dirt receiving surface 18 sloping downward toward the center O of the basin portion is formed such that the region on the rear side of the dirt receiving surface 18 is larger than the front region. Thus, the washing water smoothly flows from the front region of the dirt receiving surface 18 into the water accumulation surface W.

[0087] As Figure 6A and Figure 6B shown, the dirt receiving surface 18 has a recessed portion 18b recessed downward in its front region. The recessed portion 18b extends linearly from the front end portion 6a of the basin portion 6 toward the water accumulation surface W at the rear. Thus, the washing water swirling on the dirt receiving surface 18 converges through the recessed portion 18b and flows toward the water accumulation surface W.

[0088] As Figure 2 and Figures 5A to 5C shown, the amount by which the inner peripheral surface 20a of the inner edge portion 20 projects inward toward the basin portion 6 (the amount by which the upper end portion 20d of the inner edge portion 20 projects inward toward the basin portion 6 relative to the lower end portion 20b) is formed to be the largest at the front end portion 6a of the basin portion 6. Thus, although at the front end portion 6a of the basin portion 6 the washing water is subject to a large centrifugal force and is likely to splash outside the toilet bowl, the splashing of the washing water can be prevented.

[0089] As Figure 2 and Figures 5A to 5C shown, the inclination angle of the inner peripheral surface 20a of the inner edge portion 20 inclined inward toward the basin portion 6 with respect to the vertical direction is formed to be the largest at the front end portion 6a of the basin portion 6. Thus, at the front end portion 6a of the basin portion 6, although the washing water is subject to a large centrifugal force and is likely to splash outside the toilet bowl, the splashing of the washing water can be prevented.

[0090] Next, with reference to Figure 7 , the washing operation of the flushing toilet 1 according to the embodiment of the present invention will be described.

[0091] Figure 7 is a diagram for explaining the washing operation of the flushing toilet according to the embodiment of the present invention.

[0092] Figure 7 (a) shows the standby state. In the basin portion 6, the washing water accumulates to the initial water level of the water accumulation surface W, and even in the injection water guide path 16, the washing water accumulates to the same height position as the initial water level of the water accumulation surface W. At this time, the region A on the upstream side of the injection water guide path 16 located directly below the water storage tank 4 retains air.

[0093] Next, as Figure 7As shown in (b), the water supply device is driven (the inner-edge side solenoid valve is opened), and washing water is discharged from the inner-edge water discharge port 10 (starting inner-edge water discharge). The washing water discharged from the inner-edge water discharge port 10 swirls in the basin portion 6 and flows into the water accumulation surface W. The water level of the water accumulation surface W gradually rises, and even the water level of the washing water in the injection water guide path 16 gradually rises. Thereby, the air staying in the area A is discharged from the overflow pipe 30, and thus the injection water guide path 16 reaches a full water state.

[0094] Thereafter, as <{ Figure 7 (c) shows, in a state where washing water is being discharged from the inner-edge water discharge port 10, the drainage device 26 is driven (the drain valve 32 is opened), and washing water is discharged from the injection water discharge port 14 (starting injection water discharge). At this time, the head pressure of the washing water stored in the water storage tank 4 is applied to the washing water staying in the injection water guide path 16, and thus washing water of a first flow rate is discharged from the injection water discharge port 14. The first flow rate is a large flow rate, and the drain trap pipe 8 reaches a full water state by the injection water discharge of the first flow rate, and thus the siphon action is started. The injection water discharge of the first flow rate continues for a prescribed time, and then dirt is discharged by the strong siphon action.

[0095] Next, as Figure 7 (d) shows, in a state where washing water is being discharged from the inner-edge water discharge port 10, the drainage device 26 is stopped (the drain valve 32 is closed). Even if the drainage device 26 is stopped, since the volume of the entire injection water guide path 16 is large, a large amount of washing water stays in the injection water guide path 16 and flows in the injection water guide path 16 while being subjected to the head pressure of the stored washing water, and thus washing water of a second flow rate is discharged from the injection water discharge port 14. The second flow rate is a flow rate smaller than the first flow rate but sufficient to continue the siphon action. The injection water discharge of the second flow rate continues for a prescribed time, and then the siphon action continues.

[0096] Thereafter, as Figure 7 (e) shows, due to the siphon action, the accumulated water and dirt are discharged together, and thereby the water level of the water accumulation surface W drops, and air enters from the upper end of the inlet portion 8a of the drain trap pipe 8, and the siphon action ends. Among them, since the injection water guide path 16 is formed so that the washing water continues to stay, the entry of air can be delayed, and thus the end of the siphon action can be delayed. Washing water is continuously discharged from the inner-edge water discharge port 10, and when the washing water accumulates in the basin portion 6 to the initial water level of the water accumulation surface W, the washing ends. At this time, the washing water also accumulates in the injection water guide path 16 to the same height position as the water accumulation surface W.

[0097] Next, as Figure 7 (f) shows, the water supply device is driven (the water tank side solenoid valve is opened), and water supply to the water tank starts. If it is detected that the water level of the washing water in the water storage tank 4 rises and the float switch reaches the water stop water level (full water level) state, the water supply device stops (the water tank side solenoid valve is closed). Next, asFigure 7 As shown in (a), it becomes the initial state.

[0098] Next, with reference to Figure 8 , the cleaning situation of the basin part 6 in the flushing toilet 1 of the embodiment of the present invention will be described.

[0099] Figure 8 It is a diagram for explaining the cleaning situation of the basin part in the flushing toilet according to the embodiment of the present invention.

[0100] As Figure 8 shown, most of the cleaning water discharged from the inner edge water outlet 10 swirls (F1) on the inner circumferential surface 20a and the shelf surface 21 of the inner edge part 20. Since the radius of curvature R2 of the inner circumferential surface 20a of the inner edge part 20 is large at the front end part 6a of the basin part 6, the energy loss of the cleaning water flowing through the inner circumferential surface 20a of the inner edge part 20 can be suppressed.

[0101] A part of the cleaning water swirling on the shelf surface 21 flows down from the shelf surface 21 to the dirt receiving surface 18 and swirls on the dirt receiving surface 18. Since the dirt receiving surface 18 is formed in a convex shape protruding upward in a region on the rear side rather than the front region of the dirt receiving surface 18, a part of the cleaning water swirling on the dirt receiving surface 18 is guided to the rear side region (F2). In addition, since the dirt receiving surface 18 is formed in a concave shape recessed downward in the front region of the dirt receiving surface 18, a part of the cleaning water swirling on the dirt receiving surface 18 is guided to the water accumulation surface W (F3) through the concave-shaped dirt receiving surface 18. Since the radius of curvature of the front end part 22a of the pot part 22 becomes smaller, the cleaning water guided to the water accumulation surface W smoothly flows into the water accumulation surface W.

[0102] Hereinafter, the operation and effect of the flushing toilet 1 of the above-described embodiment of the present invention will be described.

[0103] In the flushing toilet 1 of the embodiment of the present invention, since the radius of curvature R7 of the front end part 22a of the pot part 22 is formed to be smaller than the radius of curvature R2 of the inner circumferential surface 20a of the inner edge part 20 of the front end part 6a of the basin part 6 in a top view, the cleaning water discharged from the inner edge water outlet 10 can smoothly flow into the water accumulation surface W. As a result, the energy of the cleaning water can be effectively transmitted to the water accumulation surface W, and the dirt in the water seal can be moved. As a result, the dirt can be sufficiently discharged by jetting water.

[0104] In addition, in the flushing toilet 1 according to the embodiment of the present invention, after the washing water is discharged from the inner-edge water discharge port 10, the washing water is discharged from the jet water discharge port 14. Therefore, after the dirt sunk in the accumulated water is moved by the washing water discharged from the inner-edge water discharge port 10, the washing water can be discharged from the jet water discharge port 14. As a result, the dirt can be sufficiently discharged by jet water discharge.

[0105] In the flushing toilet 1 according to the embodiment of the present invention, after the washing water discharged from the inner-edge water discharge port 10 flows into the water accumulation surface W, the washing water is discharged from the jet water discharge port 14. Therefore, after the dirt sunk in the accumulated water is moved by the washing water discharged from the inner-edge water discharge port 10, the washing water can be discharged from the jet water discharge port 14. As a result, the dirt can be sufficiently discharged by jet water discharge.

[0106] In addition, in the flushing toilet 1 according to the embodiment of the present invention, during the period when the washing water is discharged from the jet water discharge port 14, the washing water is continuously discharged from the inner-edge water discharge port 10. Therefore, the dirt sunk in the accumulated water can be moved while the washing water is discharged from the jet water discharge port 14. As a result, the dirt can be sufficiently discharged by jet water discharge.

[0107] In the flushing toilet 1 according to the embodiment of the present invention, since the inclination angle of the dirt receiving surface 18 inclined downward toward the center of the basin portion 6 is formed to be the smallest in the front region of the dirt receiving surface 18, the washing water discharged from the inner-edge water discharge port 10 can smoothly flow into the water accumulation surface W from the front region of the dirt receiving surface 18.

[0108] In addition, in the flushing toilet 1 according to the embodiment of the present invention, at the front end portion 6a of the basin portion 6, in a top view, the radius of curvature R2 of the inner peripheral surface 20a of the inner edge portion 20 is formed to be larger than the radius of curvature R1 of the outer contour 7 of the toilet body 2. Therefore, even if the outer contour 7 of the toilet body 2 is formed with a relatively small radius of curvature R1, the energy loss of the washing water flowing through the inner peripheral surface 20a of the inner edge portion 20 at the front end portion 6a of the basin portion 6 can be suppressed. Therefore, the energy loss of the washing water flowing through the inner peripheral surface 20a of the inner edge portion 20 can be suppressed, and thus the entire basin portion 6 can be sufficiently washed.

[0109] In the flushing toilet 1 according to the embodiment of the present invention, in a top view, since the inner peripheral surface 20a of the inner edge portion 20 is formed with the smallest radius of curvature R2 at the front end portion 6a of the basin portion 6, and the rear side of the front end portion 6a of the basin portion 6 is formed with a radius of curvature R3 larger than the smallest radius of curvature R2, the energy loss of the washing water flowing through the inner peripheral surface 20a of the inner edge portion 20 at the front end portion 6a of the basin portion 6 can be suppressed, and thus the entire basin portion 6 can be sufficiently washed.

[0110] In addition, in the flushing toilet 1 according to the embodiment of the present invention, since the radius of curvature of the lower end portion 20b of the inner peripheral surface 20a of the inner edge portion 20 is formed to be larger than the radius of curvature of the outer contour 7 of the toilet main body 2 at the front end portion 6a of the basin portion 6, energy loss of the flushing water flowing through the front end portion 6a of the basin portion 6 can be suppressed. Further, since the inner peripheral surface 20a of the inner edge portion 20 is formed such that the radius of curvature R5 at a position above the lower end portion 20b is substantially the same as the radius of curvature R1 of the outer contour 7 of the toilet main body 2, the toilet main body 2 can be easily manufactured.

[0111] In the flushing toilet 1 according to the embodiment of the present invention, since the basin portion 6 is provided with a ceiling surface 21 which is formed between the dirt receiving surface 18 and the inner edge portion 20 and allows the flushing water discharged from the inner edge water outlet 10 to swirl, the radius of curvature R6 of the front end portion 18a of the dirt receiving surface 18 is formed to be larger than the radius of curvature R2 of the inner peripheral surface 20a of the inner edge portion 20 at the front end portion 6a of the basin portion 6 in a plan view, so that the flushing water swirling on the ceiling surface 21 can smoothly flow down to the dirt receiving surface 18.

[0112] In addition, in the flushing toilet 1 according to the embodiment of the present invention, since the inner edge water outlet 10 is configured to discharge the flushing water forward, even in the flushing toilet 1 in which the flushing water is discharged forward from the inner edge water outlet 10, energy loss of the flushing water flowing through the inner peripheral surface 20a of the inner edge portion 20 at the front end portion 6a of the basin portion 6 can be suppressed.

[0113] In the flushing toilet 1 according to the embodiment of the present invention, since the inner edge water outlet 10 is arranged on the rear side of the position X1 where the width of the dirt receiving surface 18 in the left-right direction is the largest in a plan view, the distance from the inner edge water outlet 10 to the front end portion 6a of the basin portion 6 can be made long. Thereby, many areas can be washed with the flushing water in a high energy state before the front end portion 6a of the basin portion 6 suffers energy loss. Therefore, in the flushing toilet 1 that uses the flushing water supplied by the water supply pressure of the water pipe to wash the toilet, the washing performance of the basin portion 6 can be improved.

[0114] In addition, in the flushing toilet 1 according to the embodiment of the present invention, since the dirt receiving surface 18 is formed in a concave shape that is recessed downward in its front area, the flushing water can flow down from the front area of the dirt receiving surface 18.

[0115] In the flushing toilet 1 according to the embodiment of the present invention, since the dirt receiving surface 18 is formed in a convex shape that protrudes upward in the area on the rear side of the inner edge water outlet 10, in the area on the rear side where the water potential of the flushing water becomes weak, the flushing water can flow onto the convex dirt receiving surface 18 and flow over the rear side area.

[0116] In addition, in the flushing toilet 1 according to the embodiment of the present invention, since the dirt receiving surface 18 is formed in a convex shape that protrudes upward in a region more rearward than the front region, the flushing water can flow onto the convex dirt receiving surface 18 and spread over the entire dirt receiving surface 18.

[0117] In the flushing toilet 1 according to the embodiment of the present invention, since the inner peripheral surface 20a of the inner edge portion 20 is formed to extend inward in the upward direction, and the amount of extension of the inner peripheral surface 20a of the inner edge portion 20 is formed to be maximum at the front end portion 6a of the basin portion 6, it is possible to prevent the splashing of the flushing water at the front end portion 6a of the basin portion 6.

[0118] In addition, in the flushing toilet 1 according to the embodiment of the present invention, since the inner peripheral surface 20a of the inner edge portion 20 is formed to be inclined inward in the upward direction, and the inclination angle of the inner peripheral surface 20a of the inner edge portion 20 with respect to the vertical direction is formed to be maximum at the front end portion 6a of the basin portion 6, it is possible to prevent the splashing of the flushing water at the front end portion 6a of the basin portion 6.

[0119] The present invention is not limited to the above-described embodiments, and various changes and modifications can be made within the scope of the technical concept described in the claims.

[0120] Reference numerals:

[0121] 1: Flushing toilet

[0122] 2: Toilet main body

[0123] 4: Water storage tank

[0124] 6: Basin portion

[0125] 6a: Front end portion of the basin portion

[0126] 6b: Left front portion of the basin portion

[0127] 6c: Right front portion of the basin portion

[0128] 6d: Left side portion of the basin portion

[0129] 6e: Right side portion of the basin portion

[0130] 7: Outer contour of the toilet main body

[0131] 8: Drainage elbow pipe

[0132] 8a: Inlet portion of the drainage elbow pipe

[0133] 10: Inner edge water outlet

[0134] 14: Jet water outlet

[0135] 18: Dirt receiving surface

[0136] 18a: Front end of the dirt receiving surface

[0137] 18b: Concave portion of the dirt receiving surface

[0138] 20: Inner edge part

[0139] 20a: Inner peripheral surface of the inner edge part

[0140] 20b: Lower end of the inner edge part

[0141] 20c: Bonding part of the inner edge part

[0142] 20d: Upper end of the inner edge part

[0143] 21: Shelf surface

[0144] 22: Pot part

[0145] 22a: Front end of the pot part

[0146] 40: Upper inner edge

[0147] 42: Trunk part.

Claims

1. A water-washing toilet bowl, which is a jet-siphon type water-washing toilet bowl that discharges washing water from an inner-edge water outlet and a jet water outlet at different times respectively, and is characterized in that, It has: A basin part, which has: a basin-shaped dirt receiving surface; an inner edge part formed above the dirt receiving surface; a shelf surface formed between the dirt receiving surface and the inner edge part; and a pot part formed below the dirt receiving surface and having a water accumulation surface formed inside it; A drain trap pipe, whose inlet is connected below the basin part and is used to discharge dirt; An inner edge water discharge port, which is provided on the inner edge part and discharges washing water along the inner peripheral surface of the inner edge part; And A jet water discharge port, which is provided below the basin part and discharges washing water toward the inlet of the drain trap pipe, The radius of curvature of the front end part of the pot part is formed to be smaller than the radius of curvature of the inner peripheral surface of the inner edge part of the front end part of the basin part in a top view.

2. The water-washed toilet according to claim 1, wherein, After the washing water is discharged from the inner edge water discharge port, the washing water is discharged from the jet water discharge port.

3. The water-washed toilet according to claim 2, wherein, After the washing water discharged from the inner edge water discharge port flows into the water accumulation surface, the washing water is discharged from the jet water discharge port.

4. The water-washed toilet according to claim 1, wherein, During the period when the washing water is discharged from the jet water discharge port, the washing water is continuously discharged from the inner edge water discharge port.

5. The water-washed toilet according to claim 1, wherein, The dirt receiving surface is formed such that the inclination angle of the downward inclination toward the center of the basin part reaches the minimum in the front area.

6. The water-washed toilet according to claim 1, wherein, At the front end part of the basin part, in a top view, the radius of curvature of the inner peripheral surface of the inner edge part is formed to be larger than the radius of curvature of the outer contour of the toilet main body.

7. The water-washed toilet according to claim 6, wherein, In a top view, the inner peripheral surface of the inner edge part is formed with the smallest radius of curvature at the front end part of the basin part, and is formed with a radius of curvature larger than the smallest radius of curvature at a position more rearward than the front end part of the basin part.

8. The water-washed toilet according to claim 6, wherein, At the front end part of the basin part, in a top view, the radius of curvature of the lower end part of the inner peripheral surface of the inner edge part is formed to be larger than the radius of curvature of the outer contour of the toilet main body, and the radius of curvature at a position more upward than the lower end part is formed to be approximately the same size as the radius of curvature of the outer contour of the toilet main body.

9. The water-washed toilet according to claim 8, wherein, The basin part has a shelf surface formed between the dirt receiving surface and the inner edge part and for the washing water discharged from the inner edge water discharge port to swirl, The radius of curvature of the front end part of the dirt receiving surface is formed to be larger than the radius of curvature of the inner peripheral surface of the inner edge part of the front end part of the basin part in a top view.

10. The water-washed toilet according to claim 1, wherein, In a top view, the inner edge water discharge port is arranged at a position more rearward than the position where the width of the dirt receiving surface in the left-right direction reaches the maximum.

11. The water-washed toilet according to claim 10, wherein, The dirt receiving surface is formed in a concave shape that is recessed downward in its front area.

12. The flushing toilet according to claim 11, wherein the dirt receiving surface is formed in a convex shape protruding upward in a region on the rear side of the inner edge water outlet.

13. The flushing toilet according to claim 11, wherein the dirt receiving surface is formed in a convex shape protruding upward in a region on the rear side of the front region.

14. The flushing toilet according to claim 10, wherein the inner peripheral surface of the inner edge portion is formed to extend inward in the upward direction, and the extension amount of the inner peripheral surface of the inner edge portion is formed to be maximum at the front end portion of the basin portion.

15. The flushing toilet according to claim 10, wherein the inner peripheral surface of the inner edge portion is formed to be inclined inward in the upward direction, and the inclination angle of the inner peripheral surface of the inner edge portion inclined inward with respect to the vertical direction is formed to be maximum at the front end portion of the basin portion.

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