Flush toilet apparatus

Abstract

Provided is a flush toilet device of the type in which cleaning is performed by spraying water, the flush toilet device being capable of achieving a compact layout. A flush toilet device is provided with: a flush toilet body having a bowl part and a drain bend line extending from the lower part of the bowl part; an injection port that discharges washing water rearward into the inside of the drain bend line; and an injection water guide path for guiding the washing water to the injection port, characterized in that the injection water guide path has: a downstream-side water guide path that reaches the injection port, and a downstream-side water guide path that guides the washing water to the injection port; and an upstream-side water guide channel connected to the downstream-side water guide channel, the downstream-side water guide channel is made of ceramic, and a connection part between the upstream-side water guide channel and the downstream-side water guide channel is located at a position closer to the rear side than the injection port and closer to the lower side than a water accumulation surface.

Description

TECHNICAL FIELD

[0001] The present application relates to a flush toilet device, and particularly to a flush toilet device of the type that performs cleaning by jetting water. BACKGROUND

[0002] From the past, a flush toilet device of the type that performs cleaning by jetting water has been widely used. Jetting water (cleaning water) is discharged toward the rear from a jetting port to the inside of a drain trap line. The jetting water (cleaning water) is guided to the jetting port by a jetting guide.

[0003] As to the jetting guide, particularly as to a downstream side guide of the jetting guide to the jetting port, a technique has been proposed to resinize (make of resin) it. If the downstream side guide is resinized (achieved by a resin hose, for example), an advantage is obtained that the degree of freedom of the path design of the jetting guide is increased.

[0004] PATENT LITERATURE Patent Literature 1: Japanese Patent Application Laid-Open No. 2018-3250 SUMMARY

[0005] However, when the downstream side guide is resinized, the possibility of dirt adhering to this portion is increased. From this viewpoint, it is preferable to make the downstream side guide of ceramic.

[0006] The present application applicant disclosed in Patent Literature 1 a structure in which the downstream side guide is made of ceramic, and at the same time, the upstream side guide connected thereto is made of another member (for example, a resin member).

[0007] Here, conventionally, the connection portion between the downstream side guide and the upstream side guide is located at a position closer to the upper side than the water storage surface. This is because it is feared that when the water tightness of this connection portion is broken, unexpected water leakage (outflow) will occur (it is also possible that backflow will occur to cause sewage leakage).

[0008] The present inventors keenly studied this point, and as a result, found the knowledge that by selecting an appropriate sealing member or sealing mechanism, it is not necessary to fear the occurrence of such a breakage of water tightness. Moreover, the present inventors created a new invention as to the position of the connection portion between the downstream side guide and the upstream side guide from the viewpoint of achieving a compact layout.

[0009] The present application was completed based on such knowledge. The object of the present application is to provide a flush toilet device of the type that performs cleaning by jetting water, which can achieve a compact layout.

[0010] The present invention is a flush toilet device provided with: a flush toilet body having a bowl portion and a drain trap line extending from a lower portion of the bowl portion; a jet port that discharges cleaning water toward the rear inside of the drain trap line; and a jet water guide that guides the cleaning water to the jet port, characterized in that the jet water guide has: a downstream-side water guide that reaches the jet port; and an upstream-side water guide that is connected to the downstream-side water guide, the downstream-side water guide being ceramic, and a connection portion between the upstream-side water guide and the downstream-side water guide being located at a position that is closer to the rear side than the jet port and that is closer to the lower side than a water surface.

[0011] According to the present invention, since the connection portion between the upstream-side water guide and the downstream-side water guide is located at a position that is closer to the lower side than the water surface, a compact layout can be achieved.

[0012] Alternatively, the present invention is a flush toilet device provided with: a flush toilet body having a bowl portion and a drain trap line extending from a lower portion of the bowl portion; a jet port that discharges cleaning water toward the rear inside of the drain trap line; and a jet water guide that guides the cleaning water to the jet port, characterized in that the jet water guide has: a downstream-side water guide that reaches the jet port; and an upstream-side water guide that is connected to the downstream-side water guide, the downstream-side water guide being ceramic, and a connection portion between the upstream-side water guide and the downstream-side water guide being located at a position that is closer to the rear side than the jet port and that is closer to the lower side of the bowl portion and / or an inner rim portion.

[0013] According to the present invention, since the connection portion between the upstream-side water guide and the downstream-side water guide is located at a position that is closer to the lower side of the bowl portion and / or the inner rim portion, a compact layout can be achieved.

[0014] If the connection portion between the upstream-side water guide and the downstream-side water guide is allowed to be located at a position that is closer to the lower side than the water surface and is allowed to be located at a position that is closer to the lower side of the bowl portion and / or the inner rim portion, a more compact layout can be achieved.

[0015] In addition, in the present invention, it is preferable that a publicly known appropriate sealing member be provided at the connection portion between the upstream-side water guide and the downstream-side water guide.

[0016] Thereby, it is possible to effectively prevent the connection portion between the upstream-side water guide and the downstream-side water guide from being damaged in water tightness.

[0017] However, a publicly known appropriate sealing mechanism of a type that does not intervene a sealing member can also be adopted.

[0018] In addition, in the present invention, it is preferable that the upstream-side water guide have, for example, a resin-made hose.

[0019] Thus, the design freedom of the jet water guide is improved.

[0020] In addition, in the present application, it is preferable that the connection portion between the upstream water guide and the downstream water guide be located at a position closer to the upper side than the lower end of the opening of the jet port.

[0021] Thus, since the cleaning water does not need to be raised, the pressure loss efficiency is good.

[0022] In addition, in the present application, it is preferable that the jet port open toward the rear in the direction in which the jet port is aligned in the front-rear direction, and the connection portion between the upstream water guide and the downstream water guide also extend in the front-rear direction.

[0023] Thus, a more compact layout can be achieved, and the pressure loss efficiency is also good.

[0024] In addition, in the present application, it is preferable that the jet port open toward the rear in the direction in which the jet port is aligned in the front-rear direction, and the connection portion between the upstream water guide and the downstream water guide also extend in the front-rear direction.

[0025] Thus, a more compact layout can be achieved, and the pressure loss efficiency is also good.

[0026] When the water-flushing toilet device having the above features is employed in a wall-hung water-flushing toilet device, the advantage of "achieving a compact layout" can be effectively utilized.

[0027] According to the first aspect of the present application, since the connection portion between the upstream water guide and the downstream water guide is located at a position closer to the lower side than the water-accumulation surface, a compact layout can be achieved.

[0028] According to the second aspect of the present application, since the connection portion between the upstream water guide and the downstream water guide is located below the basin portion and / or the inner rim portion, a compact layout can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view showing a water-flushing toilet according to an embodiment of the present application. Figure 2 is a plan view of the water-flushing toilet according to the present embodiment in a state in which the sanitary washing device is detached. Figure 3 is a sectional view taken along the line III-III of Figure 2 Figure 4A ​This is a perspective view of the functional device of the flushing toilet in this embodiment, viewed from a slightly above left side. Figure 4B This is a perspective view of the functional device of the flushing toilet in this embodiment, viewed from a slightly above right side. Figure 5 This is a structural diagram showing the water supply path through which the flushing water of the toilet in this embodiment flows. Figure 6 This is a schematic cross-sectional view of the flushing toilet of this embodiment, which extends in the front-to-back direction along the vertical plane through the pump device. Figure 7 This is a schematic three-dimensional view of the upstream jet water guide pipe and the jet water guide path connecting pipe. Figure 8 This is a summary front view of the upstream jet water guide pipe and the jet water guide connecting pipe. Figure 9 This is a schematic diagram showing the flow of cleaning water through the upstream jet guide pipe and the jet guide path connecting pipe, indicated by arrows. Figure 10 This is a schematic cross-sectional view of the vicinity of the jet water guide connection pipe. Symbol Explanation 1-Flush toilet (flushing toilet device); 2-Toilet body (flushing toilet body); 2a-Bottom opening; 4-Water tank device; 6-Sanitary washing device; 8-Water stop valve; 10-Water supply pipe; 12-Basin; 14-Drainage bend pipe; 14a-Inlet; 14b-Rising pipe; 14c-Top; 14d-Rear pipe; 16-Skirt; 18-Sewage receiving surface; 20-Inner edge; 22-Inner edge water outlet; 24-Inner edge water guide; 26-Jet nozzle; 28-Downstream side jet water guide; 30-Drain connector; 32-Water supply valve device; 34-Pump device; 34a-Suction port; 34p-Pump device water guide; 36-Switching valve device; 38-Control device; 40-Base plate; 42 - Water storage tank; 44- Water supply pipe for the tank; 46- Water supply unit for the tank; 48- Float switch; 50- Fixing component; 52- Water supply pipe for the sanitary cleaning device; 54- Upstream connecting pipe; 56- Downstream supply pipe; 58- Inner edge supply pipe; 60- Upstream jet guide pipe (upstream jet guide path); 62- Overflow unit; 72- Left side area; 72a- Top wall; 72b- Rear wall; 72c- Outflow pipe; 72d- Outlet; 72e- Suction port; 100- Jet guide path connecting pipe; 101- Mounting sleeve (outer side); 102- Mounting sleeve (inner side); 103- Annular sealing component; 104- Rear side end face; A- Area; S- Space; W- Wall surface; WS- Water accumulation surface. Detailed Implementation

[0030] In the present specification, the proximal side is described as "front", the distal side as "rear", the left side as "left", and the right side as "right" when viewed from a user standing in front of the flush toilet (flush toilet device) (the left and right are reversed when viewed from a user seated on the flush toilet).

[0031] (Overall structure) Figure 1 is a perspective view of a flush toilet 1 (flush toilet device) according to an embodiment of the present application, Figure 2 is a plan view of the flush toilet 1 of the present embodiment in a state where the sanitary washing device is detached, Figure 3 is a schematic cross-sectional view as viewed along the III-III line of Figure 2

[0032] As shown in Figure 1 , the flush toilet 1 of the present embodiment is a wall-hung flush toilet whose rear surface is fixed to a wall surface W. The flush toilet 1 is provided with a toilet body 2 (flush toilet body) made of ceramic; a water tank device 4 that stores cleaning water to be supplied to the toilet body 2; and a sanitary washing device 6 that is placed on the upper surface of the toilet body 2.

[0033] A stopcock 8 for supplying or stopping cleaning water from a water supply source (not shown) such as a tap to the flush toilet 1 is provided on the wall surface W. The stopcock 8 is connected to the flush toilet 1 by a water supply pipe 10.

[0034] Figure 2 In Fig. 2, the inner edge water discharge port 22, the inner edge water guide path 24, the upstream side jet water guide path 60 (upstream side jet water guide path), the downstream side jet water guide path 28, and the jet water guide path connection pipe 100 (connection portion) are respectively indicated by broken lines.

[0035] As shown in Figure 2 and Figure 3 , the toilet body 2 is formed with a bowl portion 12 that receives excrement, a drain trap line 14 that is connected to the lower side of the bowl portion 12 and that discharges excrement, and a skirt portion 16 that surrounds the bowl portion 12 and the drain trap line 14 from the outside. A space S is formed between the bowl portion 12, the drain trap line 14, and the skirt portion 16.

[0036] The bowl portion 12 has a bowl-shaped excrement receiving surface 18 and an inner edge portion 20 that is formed along the upper edge portion of the bowl portion 12. A water accumulation (water accumulation surface WS) is formed inside the bowl portion 12.

[0037] ​The inner edge portion 20 is formed with an inner edge water discharge port 22 that discharges cleaning water to the rear, and an inner edge water guide path 24 that guides the cleaning water to the inner edge water discharge port 22. The inner edge water discharge port 22 is disposed near the center in the front-rear direction of the right side of the tub portion 12. The cleaning water discharged from the inner edge water discharge port 22 flows down to the dirt receiving surface 18 while revolving along the inner peripheral surface of the inner edge portion 20, and cleans the tub portion 12.

[0038] The tub portion 12 is formed with a spray port 26 that discharges cleaning water to the inlet 14a of the drain trap line 14. The spray port 26 is disposed opposite the inlet 14a of the drain trap line 14, and the cleaning water discharged from the spray port 26 flows into the drain trap line 14 to induce siphon action.

[0039] The cleaning water is supplied to the spray port 26 by the upstream-side spray water guide pipe 60, the spray water guide path connection pipe 100, and the downstream-side spray water guide path 28.

[0040] The drain trap line 14 has an inlet 14a connected to the lower side of the tub portion 12, an upward line 14b extending upward from the inlet 14a, a top portion 14c disposed at the highest position of the upward line 14b and defining a water surface WS (water level), and a rearward line 14d extending substantially horizontally from the top portion 14c to the rear. The rearward line 14d of the drain trap line 14 is connected to a drain pipe (not shown) in a wall surface W by a drain joint 30.

[0041] The sanitary washing device 6 has a body portion (not shown), a washing nozzle (not shown) disposed so as to be able to advance and retreat from the body portion, a toilet seat (not shown) rotatably mounted to the body portion, and a toilet cover rotatably mounted to the body portion so as to cover the toilet seat. The water supply pipe 10 connected to the stopcock 8 is connected to the body portion of the sanitary washing device 6, and supplies washing water sprayed from the washing nozzle.

[0042] In the space S, in the portion surrounded by the skirt portion 16 below the tub portion 12, the water tank device 4 is accommodated. In the space S, in the portion behind the tub portion 12, functional devices for supplying cleaning water stored in the water tank device 4 to the toilet body 2 are accommodated. The functional devices may, for example, include a water supply valve device 32, a pump device 34, a switching valve device 36, and a control device 38. In addition, a base plate 40 is provided at the floor surface opening 2a of the toilet body 2 surrounded by the skirt portion 16. The aforementioned functional devices are supported by the base plate 40.

[0043] Next, the water tank device 4, the functional devices, and the base plate 40 accommodated in the space S in the toilet body 2 will be described with reference to Figure 4A and Figure 4B

[0044] Figure 4A ​is a perspective view of the functional device of the flush toilet 1 of the present embodiment, as viewed obliquely from the left side, Figure 4B is a perspective view of the functional device of the flush toilet 1 of the present embodiment, as viewed obliquely from the right side. Figure 4A In the middle, the flow direction of the cleaning water is indicated by an arrow.

[0045] The water tank device 4 is provided with a water storage tank 42 (water tank) that stores the cleaning water to be supplied to the toilet body 2, a water tank water supply unit 46 that causes the cleaning water from a water tank water supply pipe 44 to flow into the water storage tank 42, a float switch 48 that detects the water level of the cleaning water stored in the water storage tank 42, and a fixing member 50 that fixes the water tank device 4 to the bottom surface of the toilet body 2.

[0046] When viewed from above, the water storage tank 42 is formed in an L shape, extending to the front side on the right side of the drain trap line 14, and then bending to extend to the left side. The water storage tank 42 is a resin-made water tank that stores the cleaning water for the inner rim water discharge and the jet water discharge, and can store a prescribed amount of cleaning water.

[0047] The water tank water supply unit 46 is disposed at the upper portion of the water storage tank 42. The upstream side of the water tank water supply unit 46 is connected to the water tank water supply pipe 44, and the downstream side of the water tank water supply unit 46 is connected to the water storage tank 42. Inside the water tank water supply unit 46, a flow path for guiding the cleaning water from the water tank water supply pipe 44 to the water storage tank 42 is formed.

[0048] When the water level in the water storage tank 42 falls below the water stop level (full water level), the float switch 48 is in an off state. In addition, when the water level in the water storage tank 42 rises to reach the water stop level, the float switch 48 is in an on state, causing the water supply valve device 32 to be closed.

[0049] An overflow unit 62 is installed on the water storage tank 42, and is used to discharge the cleaning water outside the water tank, for example, when the float switch 48 malfunctions and the water tank water supply continues. The overflow unit 62 is connected to the drain joint 30, and the cleaning water that overflows from the water storage tank 42 is discharged into the drain joint 30 via the overflow unit 62.

[0050] The water supply valve device 32 has a constant flow valve (not shown) for making the flow rate of the cleaning water constant, an on-off valve (not shown) provided downstream of the constant flow valve for switching the supply and stop of the cleaning water, and a solenoid valve (not shown) for driving the on-off valve. The upstream side of the water supply valve device 32 is connected to a water supply source (not shown) via the water stop 8 and the water supply pipe 10, and the downstream side of the water supply valve device 32 is connected to the sanitary washing device 6 via the sanitary washing device water supply pipe 52 and to the water tank device 4 via the water tank water supply pipe 44. When the solenoid valve is electromagnetically opened, the on-off valve is opened, and the cleaning water from the water supply source is supplied to the water tank device 4 via the water tank water supply pipe 44.

[0051] The pump device 34 is a pressurized pump that sucks and pressurizes the cleaning water stored in the water tank device 4 and supplies it to the toilet body 2. The upstream side of the pump device 34 is connected to the water tank device 4 via the upstream side connection pipe 54, and the downstream side of the pump device 34 is connected to the switching valve device 36 via the downstream side connection pipe 56. By the operation of the pump device 34, the cleaning water stored in the water tank device 4 is pressurized and discharged from the inner edge water discharge port 22 and the jet port 26, thereby performing toilet cleaning.

[0052] The switching valve device 36 has a switching valve body (not shown) that switches the water supply path for supplying the cleaning water supplied from the pump device 34 to the inner edge water discharge port 22 and the jet water discharge port 26, respectively. The upstream side of the switching valve device 36 is connected to the pump device 34 via the downstream side connection pipe 56. The downstream side of the switching valve device 36 is connected to the jet port 26 via the inner edge water supply pipe 58 and the inner edge water guide path 24, and is connected to the jet port 26 via the upstream side jet water guide pipe 60, the jet water guide path connection pipe 100, and the downstream side jet water guide path 28. When the switching valve body is in a closed state, the cleaning water from the pump device 34 is supplied to the inner edge water discharge port 22, and when the switching valve body is in an open state, the cleaning water from the pump device 34 is supplied to the inner edge water discharge port 22 and the jet port 26.

[0053] The control device 38 is electrically connected to a remote controller (not shown), the water tank device 4 (particularly, the float switch 48), the sanitary washing device 6, the water supply valve device 32, and the pump device 34, and can transmit and receive various signals. When a cleaning start signal for a large cleaning or a small cleaning is received from the remote controller, the control device 38 drives or stops the pump device 34 according to a cleaning program stored in advance.

[0054] Specifically, if the user operates the remote controller, the control device 38 drives the pump device 34 to discharge the cleaning water stored in the water tank device 4 from the inner edge water discharge port 22 and the jet port 26. In addition, the control device 38 opens the water supply valve device 32 to perform water tank water supply after toilet cleaning, and closes the water supply valve device 32 when the float switch 48 detects a full water state.

[0055] The pipes (water supply pipe 10, water tank water supply pipe 44, sanitary washing device water supply pipe 52, upstream side connection pipe 54, downstream side connection pipe 56, inner edge water supply pipe 58, and upstream side jet guide 60) connected to each element of the above-described functional devices have flexibility and can absorb manufacturing errors of the ceramic toilet body 2 and the like. On the other hand, the downstream side jet guide 28 is formed as a part of the ceramic toilet body 2.

[0056] Next, Figure 5 is a configuration diagram of a water supply path through which cleaning water of the flush toilet 1 of the present embodiment flows.

[0057] As shown in Figure 5 , as the water supply path of the flush toilet 1, a stopcock 8, a water supply valve device 32, a water tank device 4, a pump device 34, and a switching valve device 36 are arranged from the upstream side.

[0058] First, cleaning water is supplied from a water supply source to the water supply valve device 32 via the stopcock 8 and the water supply pipe 10. The cleaning water supplied to the water supply valve device 32 is supplied to the sanitary washing device 6 via the sanitary washing device water supply pipe 52 and to the water tank device 4 via the water tank water supply pipe 44.

[0059] The cleaning water stored in the water tank device 4 is sucked by the pump device 34 via the suction port 34a of the pump device guide 34p and the upstream side connection pipe 54. The cleaning water thus sucked is supplied to the switching valve device 36 via the downstream side connection pipe 56.

[0060] The cleaning water supplied to the switching valve device 36 is discharged from the inner edge water outlet 22 via the inner edge water supply pipe 58 and the inner edge guide 24 and is jetted from the jet port 26 via the upstream side jet guide pipe 60, the jet guide connection pipe 100, and the downstream side jet guide 28.

[0061] Cleaning water overflowing from the water tank device 4 is discharged to the drain joint 30 via the overflow unit 62.

[0062] Next, Figure 6 is a cross-sectional view of the flush toilet 1 of the present embodiment along a vertical plane extending in the front-rear direction through the pump device 34 and the upstream side connection pipe 54.

[0063] As shown in Figure 2 , Figure 4A , Figure 4B and Figure 6As is known, the upstream-side connection pipe 54, the pump device 34, the upstream-side water supply pipe 56, the switching valve device 36, the upstream-side jet guide pipe 60, and the jet guide passage connection pipe 100 are arranged on the left side with respect to the drain trap pipe 14. The upstream-side portion of the downstream-side jet guide passage 28 connected to the upstream-side jet guide pipe 60 by the jet guide passage connection pipe 100 is also arranged on the left side with respect to the drain trap pipe 14.

[0064] In order to more clearly show the relative positional relationship of these element members, Figure 7 schematic perspective views of these element members are shown in FIGS. 1A to 1C, Figure 8 schematic front views of these element members are shown in FIGS. 2A to 2C, Figure 9 the flow of the cleaning water flowing through these element members is shown by arrows in FIGS. 3A to 3C. In addition, Figure 10 is an enlarged sectional view of the vicinity of the jet guide passage connection pipe 100.

[0065] Returning to Figure 4A , Figure 4B and Figure 6 , in the region A on the left side with respect to the drain trap pipe 14 (a region not occupied by the L-shaped water storage tank 42), the functional devices, namely, the pump device 34, the switching valve device 36, and the control device 38 are arranged. The pump device 34, the control device 38, and the switching valve device 36 are arranged in this order in the vertical direction substantially in a row.

[0066] In addition, in this region A, the upstream-side connection pipe 54 connecting the water tank device 4 and the pump device 34, the downstream-side connection pipe 56 connecting the pump device 34 and the switching valve device 36, and the upstream-side jet guide pipe 60 (upstream-side jet guide passage) are arranged.

[0067] The pump device 34 is arranged substantially opposite to the rear wall 72b of the left-side region 72 of the water storage tank 42 in the front-rear direction. In addition, the pump device 34 is arranged at substantially the same height as the upper wall 72a of the left-side region 72.

[0068] The outflow pipe 72c extending rearward from the left-side region 72 of the water storage tank 42 is a pipe that sucks the cleaning water of the water storage tank 42 from the suction port 72e, and the outlet 72d thereof is connected to the suction port 34a of the pump device guide passage 34p of the pump device 34 by the upstream-side connection pipe 54.

[0069] The control device 38 is fixed to the upper surface of the pump device 34, and the switching valve device 36 is fixed to the upper surface of the control device 38. The downstream-side connection pipe 56 connecting the pump device 34 and the switching valve device 36 is arranged in the vicinity of the control device 38, and is arranged in parallel with the control device 38.

[0070] When viewed from above, the pump device 34, the control device 38, and the switching valve device 36 are arranged so that at least a part of each overlaps. When viewed from above, the switching valve device 36 is arranged inward of the outer periphery of the pump device 34 and the outer periphery of the control device 38. When viewed from above, the downstream-side connection pipe 56 is located inward of the outer periphery of the pump device 34.

[0071] (characteristic structure (1)) In the flush toilet 1 of the present embodiment, as shown particularly in Figure 6 and Figure 10 , the jet waterway connection pipe 100 (connection portion between the upstream-side jet water guide pipe 60 and the downstream-side jet waterway 28) is located at a position closer to the rear side than the jet port 26 and closer to the lower side than the water surface WS.

[0072] Further, in the flush toilet 1 of the present embodiment, as shown particularly in Figure 6 and Figure 10 , the jet waterway connection pipe 100 is located below the basin portion 12 (arranged inward of the outer periphery of the basin portion 12 when viewed from above).

[0073] Further, in the flush toilet 1 of the present embodiment, as shown particularly in Figure 2 , Figure 6 and Figure 10 , the jet waterway connection pipe 100 is located at a position closer to the upper side than the jet port 26 (lower end of the opening).

[0074] Further, in the flush toilet 1 of the present embodiment, as shown particularly in Figure 6 and Figure 10 , the jet waterway connection pipe 100 is water-tightly mounted on the rear side end face 104 of the ceramic portion that divides the downstream-side jet waterway 28 by the double mounting sleeve 101, 102 via the annular sealing member 103.

[0075] Further, in the flush toilet 1 of the present embodiment, the upstream-side jet water guide pipe 60 is composed of a resin hose having flexibility.

[0076] Moreover, in the flush toilet 1 of the present embodiment, as described above, the upstream-side connection pipe 54, the pump device 34, the upstream-side water supply pipe 56, the switching valve device 36, the upstream-side jet water guide pipe 60, and the jet waterway connection pipe 100 are arranged on the left side with respect to the drain trapway 14.

[0077] Further, in the flush toilet 1 of the present embodiment, as shown particularly in Figure 2 , Figure 7 and Figure 8As shown, the jet port 26 is open toward the rear in the direction in which the front-rear direction is aligned, and the jet waterway connection pipe 100 also extends in the direction in which the front-rear direction is aligned.

[0078] (Characteristic Structure (2)) In the flush toilet 1 of the present embodiment, the pump device 34 sucks the cleaning water from the left side area 72 of the water storage tank 42 through the suction port 72e of the outflow pipe 72c (suction portion), the outflow pipe 72c, the upstream side connection pipe 54, and the suction port 34a of the pump device waterway 34p.

[0079] Further, the outflow pipe 72c (including the suction port 72e) is also disposed on the left side with respect to the drain trap pipe 14, as with the upstream side connection pipe 54 and the pump device 34.

[0080] In addition, in the flush toilet 1 of the present embodiment, the outflow pipe 72c (including the suction port 72e) is open in the direction in which the front-rear direction is aligned, and the jet waterway connection pipe 100 also extends in the direction in which the front-rear direction is aligned.

[0081] Thus, in the flush toilet 1 of the present embodiment, as shown particularly in Figure 9 the flow direction when the cleaning water flows through the outflow pipe 72c is the front-rear direction, and the flow direction when the cleaning water flows through the jet waterway connection pipe 100 is also the front-rear direction.

[0082] In addition, in the flush toilet 1 of the present embodiment, as shown particularly in Figure 6 the outflow pipe 72c is also positioned below the bowl portion 12 (disposed inside the outer periphery of the bowl portion 12 when viewed from above).

[0083] In addition, in the flush toilet 1 of the present embodiment, as shown particularly in Figure 6 and Figure 9 the entire waterway from the outflow pipe 72c to the jet waterway connection pipe 100 is disposed on the same left side as the outflow pipe 72c and the pump device 34 with respect to the drain trap pipe 14, is disposed so as not to overlap the drain trap pipe 14 when viewed from above, and is positioned more toward the lower side than the inner edge portion 20.

[0084] (Action Effects Based on Characteristic Structure (1)) According to the flush toilet 1 of the present embodiment as described above, since the jet waterway connection pipe 100 is positioned more toward the lower side than the water surface WS, a compact layout can be achieved.

[0085] In the past, there has been a convention of positioning the jet waterway connection pipe 100 (connection portion) between the downstream-side jet waterway 28 made of ceramic and the upstream-side jet water conduit 60 (upstream-side jet waterway) made of resin at a position closer to the upper side than the water storage surface WS, but in the flush toilet 1 of the present embodiment, water tightness around the jet waterway connection pipe 100 is ensured by using the annular sealing member 103 or the like, thereby eliminating such a convention.

[0086] In addition, according to the flush toilet 1 of the present embodiment, since the jet waterway connection pipe 100 is positioned below the bowl portion 12 (arranged while effectively utilizing the area below the bowl portion 12), a compact layout can also be achieved.

[0087] If the connection portion between the upstream-side waterway and the downstream-side waterway is allowed to be positioned at a position closer to the lower side than the water storage surface, and is allowed to be positioned below the bowl portion, a more compact layout can be achieved. (However, even if a form in which a part or all of the connection portion between the upstream-side waterway and the downstream-side waterway is positioned below the inner edge portion instead of below the bowl portion is adopted, a compact layout can be achieved.)

[0088] In addition, according to the flush toilet 1 of the present embodiment, water tightness between the jet waterway connection pipe 100 (or the mounting sleeves 101, 102) and the rear side end surface 104 of the ceramic portion that divides the downstream-side jet waterway 28 is ensured by the annular sealing member 103. Thereby, leakage of cleaning water (or sewage at the time of backflow occurrence) around the jet waterway connection pipe 100 can be surely prevented.

[0089] In addition, according to the flush toilet 1 of the present embodiment, since the upstream-side jet water conduit 60 is composed of a resin hose having flexibility, design freedom of the upstream-side jet water conduit 60 is improved.

[0090] In addition, according to the flush toilet 1 of the present embodiment, since the jet waterway connection pipe 100 is positioned at a position closer to the upper side than the jet port 26 (opening lower end), there is no path for the cleaning water to rise, and pressure loss efficiency is good.

[0091] In addition, according to the flush toilet 1 of the present embodiment, since the upstream-side connection pipe 54, the pump device 34, the upstream-side water supply conduit 56, the switching valve device 36, the upstream-side jet water conduit 60, and the jet waterway connection pipe 100 are arranged on the left side with respect to the drain trapway 14, a more compact layout can be achieved, and pressure loss efficiency is also good.

[0092] Further, according to the flush toilet 1 of the present embodiment, since the jet port 26 is opened toward the rear in the direction in which the front-rear direction is aligned, and the jet waterway connection pipe 100 is also extended in the direction in which the front-rear direction is aligned, a more compact layout can be achieved, and the pressure loss efficiency is also good.

[0093] (Action effect based on the characteristic structure (2)) Further, according to the flush toilet 1 of the present embodiment as described above, the outflow pipe 72c (including the suction port 72e) is also disposed on the left side with respect to the drain trap pipe 14, like the upstream-side connection pipe 54 and the pump device 34. Thus, the outflow pipe 72c, the pump device 34, and the jet waterway connection pipe 100 are disposed on the left side (same side) with respect to the drain trap pipe 14, a compact layout can be achieved, and the pressure loss efficiency of the jet water discharge can be improved.

[0094] Further, according to the flush toilet 1 of the present embodiment, since the outflow pipe 72c is opened in the direction in which the front-rear direction is aligned, and the jet waterway connection pipe 100 is also extended in the direction in which the front-rear direction is aligned, a more compact layout can be achieved, and the pressure loss efficiency of the jet water discharge can be further improved.

[0095] Further, in the flush toilet 1 of the present embodiment, as particularly shown in Figure 9 , the flow direction of the cleaning water flowing through the outflow pipe 72c is the front-rear direction, and the flow direction of the cleaning water flowing through the jet waterway connection pipe 100 is also the front-rear direction. With this feature, it can also be evaluated that a more compact layout can be achieved, and the pressure loss efficiency of the jet water discharge can be further improved.

[0096] Further, in the flush toilet 1 of the present embodiment, as particularly shown in Figure 6 , the outflow pipe 72c is also positioned below the basin portion 12 (disposed inside the outer periphery of the basin portion 12 when viewed from above). With this feature, it can also be evaluated that a more compact layout can be achieved.

[0097] Further, in the flush toilet 1 of the present embodiment, as particularly shown in Figure 6 and Figure 9 , the entire waterway from the outflow pipe 72c to the jet waterway connection pipe 100 is disposed on the same left side as the outflow pipe 72c and the pump device 34 with respect to the drain trap pipe 14, is disposed so as not to overlap the drain trap pipe 14 when viewed from above, and is positioned more toward the lower side than the inner edge portion 20. With each of these features and / or a combination of these features, it can also be evaluated that a more compact layout can be achieved, and the pressure loss efficiency of the jet water discharge can be further improved.

[0098] (Modified example 1) In the foregoing embodiment, the outflow line 72c (suction portion) penetrates the rear wall 72b of the left side region 72 of the water storage tank 42, and the jet guide waterway connection pipe 100 (connection portion between the upstream side jet guide water pipe 60 and the downstream side jet guide waterway 28) penetrates the rear wall of the ceramic portion that divides the downstream side jet guide waterway 28, but the present application is not limited to these connection types.

[0099] For example, the suction portion that suctions the cleaning water of the water storage tank 42 can also be of a type that is configured by the joining of the connection surface of the tank side line and the connection surface of the pump side line. Also, with respect to the connection portion between the upstream side jet guide waterway and the downstream side jet guide waterway, it can also be of a type that is configured by the joining of the connection surface of the upstream side jet guide waterway and the connection surface of the downstream side guide waterway.

[0100] When these types are employed, it is preferable that each of the connection surfaces, that is, the connection surface of the tank side line, the connection surface of the pump side line, the connection surface of the upstream side guide waterway, and the connection surface of the downstream side guide waterway, be aligned in a mutually parallel manner. Thereby, a more compact layout can be achieved.

[0101] (Modified Example 2) In the foregoing embodiment and Modified Example 1, the flush toilet 1 is wall-hung. When a flush toilet (flush toilet device) having the features of the foregoing embodiment and Modified Example 1 is wall-hung, the advantage of "achieving a compact layout" can be effectively utilized.

[0102] However, at least at the time of filing of the present application, the flush toilet device of the present application is not limited to wall-hung, but can also be floor-standing. Even when floor-standing, the same effects as described above can be obtained.

[0103] Furthermore, the present application also includes the following features (invention). [Feature 1] A flush toilet device, having: a flush toilet body having a bowl portion and a drain trap line extending from a lower portion of the bowl portion; a jet port that discharges cleaning water toward the rear inside of the drain trap line; and a jet guide waterway that guides the cleaning water to the jet port, characterized in that the jet guide waterway has: a downstream side guide waterway that reaches the jet port; and an upstream side guide waterway that is connected to the downstream side guide waterway, the downstream side guide waterway is of ceramic, a connection portion between the upstream side guide waterway and the downstream side guide waterway is located at a position that is closer to the rear side than the jet port and is closer to the lower side than the water accumulation surface. [Feature 2] A flush toilet device, provided with a flush toilet body having a bowl portion and a drain trap line extending from a lower portion of the bowl portion; a jet port discharging cleaning water toward the rear inside of the drain trap line; and a jet water guide channel that guides the cleaning water to the jet port, characterized in that the jet water guide channel has a downstream-side water guide channel reaching the jet port and an upstream-side water guide channel connected to the downstream-side water guide channel, the downstream-side water guide channel is ceramic, the connection portion between the upstream-side water guide channel and the downstream-side water guide channel is located at a position closer to the rear side and below the bowl portion and / or inner rim portion than the jet port. [Feature 3] The flush toilet device according to Feature 1, characterized in that the connection portion between the upstream-side water guide channel and the downstream-side water guide channel is located below the bowl portion and / or inner rim portion. [Feature 4] The flush toilet device according to any one of Features 1 to 3, characterized in that a sealing member is provided at the connection portion between the upstream-side water guide channel and the downstream-side water guide channel. [Feature 5] The flush toilet device according to any one of Features 1 to 4, characterized in that the upstream-side water guide channel has a resin-made hose. [Feature 6] The flush toilet device according to any one of Features 1 to 5, characterized in that the connection portion between the upstream-side water guide channel and the downstream-side water guide channel is located at a position closer to the upper side than the lower end of the opening of the jet port. [Feature 7] The flush toilet device according to any one of Features 1 to 6, characterized in that further provided with a water tank that temporarily stores cleaning water; and a pump that sucks the cleaning water stored in the water tank, the pump is disposed on either side of the drain trap line with respect to the left and right, the connection portion between the upstream-side water guide channel and the downstream-side water guide channel is also disposed on the same side as the pump with respect to the left and right of the drain trap line. [Feature 8] The flush toilet device according to any one of Features 1 to 7, characterized in that the jet port is open toward the rear in a direction in which the jet port and the drain trap line are aligned in the front-rear direction, The connection portion between the upstream side waterway and the downstream side waterway also extends in the front-rear direction. [Feature 9] The flush toilet device according to any one of Features 1 to 8, characterized in that the flush toilet device is a wall-hung flush toilet device.

Claims

1. A flush toilet device, provided with: a flush toilet body having a bowl portion and a drain trap line extending from a lower portion of the bowl portion; a jet port discharging cleaning water toward a rear inside of the drain trap line; and a jet water guide that guides the cleaning water to the jet port, characterized in that the jet water guide has: a downstream-side water guide reaching the jet port; and an upstream-side water guide connected to the downstream-side water guide, the downstream-side water guide is ceramic, and a connection portion between the upstream-side water guide and the downstream-side water guide is located at a position closer to a rear side than the jet port and closer to a lower side than a water surface.

2. A flush toilet device, provided with: a flush toilet body having a bowl portion and a drain trap line extending from a lower portion of the bowl portion; a jet port discharging cleaning water toward a rear inside of the drain trap line; and a jet water guide that guides the cleaning water to the jet port, characterized in that the jet water guide has: a downstream-side water guide reaching the jet port; and an upstream-side water guide connected to the downstream-side water guide, the downstream-side water guide is ceramic, and a connection portion between the upstream-side water guide and the downstream-side water guide is located at a position closer to a rear side than the jet port and closer to a lower side than the bowl portion and / or an inner rim portion. The connection portion between the upstream-side water guide and the downstream-side water guide is located below the bowl portion and / or the inner rim portion. A sealing member is provided at the connection portion between the upstream-side water guide and the downstream-side water guide. The upstream-side water guide has a resin-made hose. The connection portion between the upstream-side water guide and the downstream-side water guide is located at a position closer to an upper side than an opening lower end of the jet port.

7. The flush toilet device according to any one of claims 1 to 3, characterized in that further provided are: a water tank temporarily storing the cleaning water; and a pump that sucks the cleaning water stored in the water tank, the pump is disposed on either side of the drain trap line with respect to the drain trap line, and the connection portion between the upstream-side water guide and the downstream-side water guide is also disposed on the same side as the pump with respect to the drain trap line.

8. The flush toilet device according to claim 7, characterized in that the jet port is open toward the rear in a direction in which the jet port is aligned in a front-rear direction, and the connection portion between the upstream-side water guide and the downstream-side water guide also extends in the front-rear direction. The flush toilet device is a wall-hung flush toilet device. ​ ​ ​ 3. The water-flushing toilet apparatus as claimed in claim 1, wherein ​ 4. A water-flushing toilet arrangement according to any one of claims 1 to 3, characterized in that ​ 5. A water-flushing toilet arrangement according to claim 4, c h a r a c t e r i s e d i n that ​ 6. A water-flushing toilet arrangement according to any one of claims 1 to 3, characterized in that ​ ​ ​ ​ ​ ​ ​ ​ ​ 9. A water-flushing toilet arrangement according to any one of claims 1 to 3, characterized in that ​

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