Water-washable toilet

Abstract

The present invention aims to provide a flush toilet that can stably supply flushing water to the jet nozzle and reliably discharge waste. [Solution] The present invention relates to a siphon jet type flush toilet 1, comprising a toilet body 2 having a bowl portion 6 for receiving waste, a drain trap pipe 8 connected below the bowl portion 6 for discharging waste, a jet outlet 14 provided below the bowl portion 6 for discharging flushing water toward the inlet 8a of the drain trap pipe 8, and a jet water channel 16 for guiding flushing water to the jet outlet 14; a flushing water tank 4 for storing flushing water supplied to the toilet body and having a jet drain outlet 4c formed therein for discharging the stored flushing water to the toilet body; and a drain valve device 33 for opening and closing the jet drain outlet 4c of the flushing water tank 4, wherein a water guide member 34 is provided below the jet drain outlet 4c of the flushing water tank 4 for guiding at least a portion of the flushing water discharged from the jet drain outlet 4c toward the jet water channel 16.

Description

Technical Field

[0001] The present invention relates to a flush toilet, and more particularly to a siphon jet type flush toilet.

Background Art

[0002] Conventionally, as described in Patent Document 1, a siphon jet type flush toilet is known that generates a siphon action by jet water discharge to discharge waste. Such a flush toilet includes a jet spout that is provided below the bowl portion and discharges wash water toward the inlet of a drain trap conduit, and a jet water conduit that is connected to a wash water tank and supplies wash water to the jet spout. When wash water is supplied from the wash water tank to the jet water conduit, the wash water flows through the jet water conduit and is discharged from the jet spout. The wash water discharged from the jet spout flows into the drain trap conduit to generate the siphon action.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the flush toilet described in the above-mentioned Patent Document 1, since the jet water conduit is formed of ceramic, manufacturing variations may occur in the shape of the jet water conduit. If manufacturing variations occur in the shape of the jet water conduit, wash water cannot be stably supplied to the jet spout, which causes a problem that waste may not be discharged.

[0005] Therefore, the present invention aims to provide a flush toilet that can stably supply flushing water to the jet nozzle and reliably discharge waste. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a siphon jet type flush toilet, comprising: a toilet body comprising: a bowl portion for receiving waste; a drain trap pipe connected below the bowl portion for discharging waste; a jet outlet provided below the bowl portion for discharging flushing water toward the inlet of the drain trap pipe; and a jet water channel for guiding flushing water to the jet outlet; a flushing water tank for storing flushing water supplied to the toilet body and having a drain port formed therein for discharging the stored flushing water to the toilet body; and a drain valve device for opening and closing the drain port of the flushing water tank, wherein a water guide member is provided below the drain port of the flushing water tank for guiding at least a portion of the flushing water discharged from the drain port toward the jet water channel.

[0007] According to the present invention configured in this way, a water guide member is provided below the drain port of the washing water tank to guide at least a portion of the washing water discharged from the drain port toward the jet water channel. This prevents the washing water discharged from the drain port of the washing water tank from colliding with the bottom surface of the jet water channel and generating turbulence, allowing the washing water to flow in a rectified manner. As a result, washing water can be supplied stably to the jet outlet, and waste can be reliably discharged.

[0008] In the present invention, preferably, the water guiding member is provided with a discharge opening for discharging cleaning water toward the jet water channel, and the cross-sectional area of ​​this discharge opening is set to be smaller than the cross-sectional area of ​​the drain outlet.

[0009] According to the present invention configured in this manner, the water guiding member is provided with a discharge opening for discharging cleaning water toward the jet water channel, and the cross-sectional area of ​​this discharge opening is set to be smaller than the cross-sectional area of ​​the drain outlet, thereby preventing the generation of turbulence caused by the widening of the drainage channel through which the cleaning water flows.

[0010] Furthermore, in the present invention, preferably, the water guiding member is provided with a receiving surface portion that receives at least a portion of the cleaning water discharged from the drain port, and this receiving surface portion is provided with an inclined surface portion that slopes downward in the direction in which the cleaning water flows.

[0011] According to the present invention configured in this way, the water guiding member is provided with a receiving surface that receives at least a portion of the cleaning water discharged from the drain port, and this receiving surface is provided with an inclined surface that slopes downward in the direction in which the cleaning water flows, so that the cleaning water discharged from the drain port of the cleaning water tank flows along the inclined surface, the cleaning water can be flowed in a more streamlined manner.

[0012] In the present invention, preferably, the receiving surface of the water guiding member is arranged to form a gap with respect to the bottom surface of the jet water channel.

[0013] According to the present invention configured in this way, the receiving surface of the water guiding member is positioned to form a gap with respect to the bottom surface of the jet water channel, so that the water guiding member can be installed inside the jet water channel regardless of manufacturing variations in the shape of the jet water channel.

[0014] Furthermore, in the present invention, the receiving surface of the water guiding member is formed substantially parallel to the bottom surface of the jet water channel.

[0015] According to the present invention configured in this manner, the receiving surface of the water guiding member is formed almost parallel to the bottom surface of the jet water channel, so that the gap between the receiving surface of the water guiding member and the bottom surface of the jet water channel can be reduced, and the cleaning water can flow smoothly from the discharge opening of the water guiding member to the jet water channel.

[0016] In the present invention, the water discharge opening of the water guide member is formed to open toward the flow direction of the washing water flowing in the jet water conduit.

[0017] According to the present invention configured as described above, since the water discharge opening of the water guide member is formed to open toward the flow direction of the washing water flowing in the jet water conduit, the washing water discharged from the water discharge opening can smoothly merge with the washing water in the jet water conduit.

[0018] Further, in the present invention, the water guide member is arranged inside the opening edge of the drain port in a plan view.

[0019] According to the present invention configured as described above, since the water guide member is arranged inside the opening edge of the drain port of the washing water tank in a plan view, the water guide member can be easily installed through the drain port of the washing water tank. [Effects of the Invention]

[0020] According to the flush toilet of the present invention, the present invention can stably supply washing water to the jet water spout, and can reliably discharge waste. [Brief Description of the Drawings]

[0021] [Figure 1] It is a plan view of a flush toilet according to an embodiment of the present invention. [Figure 2] It is a cross-sectional view taken along line II-II in Figure 1. [Figure 3] It is an exploded perspective view of the washing water tank of the flush toilet according to the embodiment of the present invention. [Figure 4] It is a perspective view of the washing water tank of the flush toilet according to the embodiment of the present invention, viewed from the upper front side. [Figure 5] It is an enlarged partial enlarged view showing the vicinity of the water guide member of the flush toilet according to the embodiment of the present invention shown in Figure 2. [Figure 6A] It is a cross-sectional view taken along line VIA-VIA in Figure 5. [Figure 6B] A cross-sectional view taken along line VIB-VIB of Figure 5. [Figure 6C] A cross-sectional view taken along line VIC-VIC of Figure 5. [Figure 7] A cross-sectional view taken along line VII-VII of Figure 5. [Figure 8A] A schematic diagram showing the flow of flushing water in the initial stage of flushing of the flush toilet according to the embodiment of the present invention. [Figure 8B] A schematic diagram showing the flow of flushing water in the middle stage of flushing of the flush toilet according to the embodiment of the present invention. [Figure 8C] A schematic diagram showing the flow of flushing water in the final stage of flushing of the flush toilet according to the embodiment of the present invention. [Mode for Carrying Out the Invention]

[0022] Hereinafter, the flush toilet according to the embodiment of the present invention will be described with reference to the drawings. First, the basic structure of the flush toilet 1 according to the embodiment of the present invention will be described with reference to Figures 1 to 4. Figure 1 is a plan view of the flush toilet according to the embodiment of the present invention, Figure 2 is a cross-sectional view taken along line II-II of Figure 1, Figure 3 is an exploded perspective view of the flush toilet according to the embodiment of the present invention, and Figure 4 is a perspective view of the flushing water tank of the flush toilet according to the embodiment of the present invention as viewed from the upper front side. In Figures 1 and 2, the rim water conduit and the jet water conduit are each indicated by broken lines. In the present specification, description is made with the near side when viewed from the front of the flush toilet defined as the front side, the far side as the rear side, the right side as the right side, the left side as the left side, and the center side of the toilet when the flush toilet is viewed from above defined as the inner side, and the outer shell side of the toilet as the outer side.

[0023] As shown in Figures 1 and 2, the flush toilet 1 according to the embodiment of the present invention is a siphon jet type flush toilet that generates a siphon action by jet water discharge to discharge waste.

[0024] As shown in Figure 1, the flush toilet 1 comprises a toilet bowl body 2 and a flush water tank 4 located at the rear upper part of the toilet bowl body 2. The toilet bowl body 2 and the flush water tank 4 are integrally formed from ceramic. The flush water tank 4 is provided with a lever handle (not shown), and the toilet is flushed when the user operates the lever handle.

[0025] The toilet bowl body 2 comprises a bowl portion 6 for receiving waste, a drain trap pipe 8 provided at the bottom of the bowl portion 6 for discharging waste by siphon action, a rim spout 10 for rim water discharge, a rim water channel 12 for supplying flushing water to the rim spout 10, a jet spout 14 for jet water discharge, and a jet water channel 16 for supplying flushing water to the jet spout 14. The rim water channel 12 and the jet water channel 16 are provided independently of each other. In the flush toilet bowl 1 according to the embodiment of the present invention, the rim water channel 12 and the jet water channel 16 are provided independently of each other, but they may be configured with a single common water channel.

[0026] The bowl portion 6 comprises a bowl-shaped waste receiving surface 18, a rim portion 20 formed along the upper edge of the bowl portion 6 and having an inner circumferential surface 20a that overhangs toward the interior of the bowl portion 6, a shelf surface 22 formed between the waste receiving surface 18 and the rim portion 20, and a pot portion 24 formed below the waste receiving surface 18, in which accumulated water W is formed. The water level of the accumulated water W is at the initial water level WL0 in the standby state before the start of washing.

[0027] The drain trap pipe 8 comprises an inlet 8a, an upward pipe 8b extending upward from the inlet 8a, a downward pipe 8c extending downward from the upward pipe 8b, and a top 8d located between the downward pipe 8c and the upward pipe 8b that defines the initial water level WL0 of the accumulated water W. The lower end of the downward pipe 8c of the drain trap pipe 8 is connected to a drain pipe (not shown) on the building side via a drain socket (not shown).

[0028] The rim spout 10 is formed in the rim portion 20, positioned on the right side of the bowl portion 6 and near the center in the front-to-back direction, and is formed to open forward. The flushing water discharged from the rim spout 10 swirls clockwise on the shelf surface 22 along the inner circumferential surface 20a of the rim portion 20. In this way, the flushing water swirls on the shelf surface 22, causing the flushing water to flow down from the shelf surface 22 to the waste receiving surface 18, thereby cleaning the waste receiving surface 18. In the flush toilet 1 according to the embodiment of the present invention, only one rim spout 10 is provided, but two or more rim spouts may be provided.

[0029] The rim water channel 12 has its upstream end connected to a rim drain port 4b formed in the bottom surface 4a of the flushing water tank 4, and its downstream end connected to the rim discharge port 10. In a plan view, the rim water channel 12 extends almost in a straight line forward from the rim drain port 4b of the flushing water tank 4 (see Figure 1). Flushing water is supplied to the rim water channel 12 from the flushing water tank 4, and the flushing water is discharged from the rim discharge port 10 by the head pressure of the flushing water stored in the flushing water tank 4. In the flush toilet 1 according to the embodiment of the present invention, flushing water is supplied to the rim water channel 12 from the flushing water tank 4, but the rim water channel 12 may be directly connected to a water source such as a water supply, and flushing water from a water supply source such as a water supply may be directly supplied to the rim water channel 12.

[0030] The jet outlet 14 is formed at the bottom of the bowl section 6. The jet outlet 14 is positioned opposite the inlet 8a of the drain trap pipe 8 and directed toward the inlet 8a of the drain trap pipe 8. The cleaning water is discharged from the jet outlet 14 toward the inlet 8a of the drain trap pipe 8, thereby promptly inducing a siphon effect.

[0031] The jet conduit 16 has its upstream end connected to a jet drain port 4c formed in the bottom surface 4a of the cleaning water tank 4, and its downstream end connected to a jet outlet 14. The jet conduit 16 includes a main channel 16a that extends straight forward from the jet drain port 4c of the cleaning water tank 4, a left-side bend channel 16b that branches off from the downstream end of the main channel 16a and extends forward after bending to the left, a right-side bend channel 16c that branches off from the downstream end of the main channel 16a and extends forward after bending to the right, and an outlet channel 16d where the downstream ends of the left-side bend channel 16b and the right-side bend channel 16c merge and extend straight backward to connect to the jet outlet 14 (see Figure 1). Cleaning water is supplied to the jet conduit 16 from the cleaning water tank 4, and the cleaning water is discharged from the jet outlet 14 by the head pressure of the cleaning water stored in the cleaning water tank 4.

[0032] The flushing water tank 4 is a tank that stores flushing water supplied from a water source (not shown), such as a water tap. The flushing water tank 4 is a gravity-fed tank that uses gravity to supply the stored flushing water to the toilet bowl body 2. The flushing water tank 4 comprises a ceramic outer tank 26 and a resin inner tank 28 placed inside the outer tank 26. The bottom surface 26a of the outer tank 26 is provided with a jet drain port 26b and a rim drain port 26c. The bottom surface 28a of the inner tank 28 is also provided with a jet drain port 28b. Furthermore, the inner tank 28 is equipped with fixing screws and fixing brackets (not shown) on its bottom surface 28a, and the inner tank 28 is fixed to the toilet bowl body 2 by being sandwiched between the bottom surface 26a of the outer tank 26 and the bottom surface 28a of the inner tank 28 and the fixing brackets. In the flush toilet 1 according to the embodiment of the present invention, the flush water tank 4 includes an outer tank 26 and an inner tank 28, but it may also include only the outer tank 26 without the inner tank 28, or it may include only the inner tank 28 without the outer tank 26.

[0033] The flushing water stored in the outer tank 26 (and outside the inner tank 28) flows into the rim water channel 12 through the rim drain port 26c of the outer tank 26. The flushing water stored in the inner tank 28 flows into the jet water channel 16 through the jet drain port 28b of the inner tank 28 and the jet drain port 26b of the outer tank 26. In the embodiment of the present invention, the flush toilet 1 has separate rim drain ports 4b and jet drain ports 4c, but the rim drain port 4b and jet drain port 4c may be configured as a single drain port.

[0034] As shown in Figures 3 and 4, an outer wall portion 30 is formed on the bottom surface 28a of the inner tank 28, extending vertically upward from the outer circumference of the jet drain port 28b. The outer wall portion 30 is integrally formed with the inner tank 28. The outer wall portion 30 is formed in a cylindrical shape and is arranged to surround the jet drain port 28b. An overflow pipe 32 is integrally formed on the right front outer wall portion 30. The overflow pipe 32 extends horizontally from the outer wall portion 30, then bends at a right angle and extends vertically upward. The upper end of the overflow pipe 32 is open to the atmosphere and is configured to drain the overflow water from the flushing water tank 4 into the toilet bowl body 2. In addition, an overflow cap 31 is attached to the upper end of the overflow pipe 32 to prevent foreign objects from flowing into the overflow pipe 32.

[0035] The bottom surface 28a of the inner tank 28 is provided with a water guide member 34 that extends vertically downward from the jet drain port 28b. The water guide member 34 is made of a resin material and is integrally formed with the inner tank 28 (see Figure 3). When the inner tank 28 is attached to the outer tank 26, the water guide member 34 is positioned within the jet water guide channel 16. Furthermore, a drainage channel is configured within the water guide member 34 to guide the flushing water that flows into the water guide member 34 to the jet water guide channel 16 (see Figure 5). In the flush toilet 1 of this embodiment of the present invention, the water guide member 34 is integrated with the inner tank 28, but the water guide member 34 may be a separate unit from the inner tank 28.

[0036] A sealing member 35 is provided between the drain valve device 33 and the toilet bowl body 2 to create a watertight seal between them. Specifically, the sealing member 35 is provided on the outer circumferential surface of the jet drain port 28b of the inner tank 28, creating a watertight seal between the inner tank 28 and the toilet bowl body 2. The sealing member 35 is a ring-shaped rubber packing. In this embodiment of the present invention, the sealing member 35 is provided on the outer circumferential surface of the jet drain port 28b of the inner tank 28, but it may also be provided on the drain valve device 33 or on the water guide member 34.

[0037] A jet drain valve device 33 is provided at the jet drain port 28b of the inner tank 28. The jet drain valve device 33 comprises a drain channel member 36 that forms a drain channel, a valve body (not shown) that opens and closes the drain port 36a of the drain channel member 36, and a drive mechanism (not shown) that drives the valve body by the operation of a lever handle by the user.

[0038] The drainage channel member 36 is made of a resin material and includes an inner wall portion 36b that forms a drainage channel, a valve seat 36c that protrudes upward from the upper surface of the inner wall portion 36b and on which a valve body sits or detaches, and a communication port 36d for allowing cleaning water from the inner tank 28 to flow into the drainage channel of the inner wall portion 36b. The inner wall portion 36b of the drainage channel member 36 is formed in a cylindrical shape and extends vertically downward through the jet drain port 28b and the water guide member 34.

[0039] The valve body of the jet drain valve device 33 is configured to move vertically up and down to open and close the drain port 36a of the drain channel member 36. The drive mechanism is, for example, a hydraulic drive mechanism driven by the water pressure of the cleaning water supplied from the water source. The drive mechanism is configured such that when the user operates the lever handle, the water pressure of the cleaning water is applied, raising the valve body of the jet drain valve device 33, and after a predetermined time has elapsed, the water pressure of the cleaning water is no longer applied, causing the valve body of the jet drain valve device 33 to lower.

[0040] A rim drain valve device (not shown) is provided at the rim drain port 26c of the outer tank 26. The rim drain valve device is positioned above the rim drain port 26c and is configured to open and close the rim drain port 4b by moving its valve body vertically up and down in response to the user's operation of a lever handle.

[0041] A water supply valve device (not shown) for supplying cleaning water is provided inside the outer tank 26 (and outside the inner tank 28). The water supply valve device is configured to switch the supply of cleaning water to the outer tank 26 and the inner tank 28 on and off. The water supply valve device is equipped with a float (not shown) that opens and closes a valve body in conjunction with the water level in the outer tank 26. The valve body is opened when the water level in the outer tank 26 falls below the full water level, and the valve body is closed when the water level in the outer tank 26 reaches the full water level.

[0042] Next, with reference to Figures 5, 6A to 6C and 7, the water supply member 34 of the flush toilet 1 according to an embodiment of the present invention will be described in detail. Figure 5 is a magnified view of the area around the water guide member of a flush toilet according to the embodiment of the present invention shown in Figure 2; Figure 6A is a cross-sectional view along the line VIA-VIA in Figure 5; Figure 6B is a cross-sectional view along the line VIB-VIB in Figure 5; Figure 6C is a cross-sectional view along the line VIC-VIC in Figure 5; and Figure 7 is a cross-sectional view along the line VII-VII in Figure 5.

[0043] As shown in Figure 5, the water guide member 34 is a component that guides the cleaning water discharged from the jet drain port 4c of the cleaning water tank 4 to the jet water channel 16 while rectifying its flow. The water guide member 34 is made of a resin material and extends from the jet drain port 4c into the jet water channel 16. This prevents the cleaning water discharged from the jet drain port 4c of the cleaning water tank 4 from colliding with the bottom surface 16e of the jet water channel 16 and generating turbulence, allowing the cleaning water to flow while being rectified.

[0044] The water guiding member 34 comprises, from the upstream side, a hanging wall portion 34a extending vertically downward from the jet drain port 28b of the inner tank 28, a water discharge opening 34b formed in the front hanging wall portion 34a, and a receiving surface portion 34c that bends and extends forward from the lower end of the rear hanging wall portion 34a. Furthermore, the rear receiving surface portion 34c is provided with an inclined surface portion 34d that slopes downward in the direction in which the cleaning water flows. The inclined surface portion 34d is set so that its angle of inclination downward with respect to the horizontal is larger than that of the front receiving surface portion 34c.

[0045] The hanging wall portion 34a of the water guiding member 34 is formed in a cylindrical shape and penetrates the jet drain port 26b of the outer tank 26, and is inserted into the jet water channel 16. The lower end of the hanging wall portion 34a is located below the upper surface portion 16f of the jet water channel 16.

[0046] The discharge opening 34b of the water guide member 34 opens laterally toward the front. Furthermore, the discharge opening 34b is formed to open in the direction of the flow of cleaning water flowing through the jet water guide channel 16. In addition, when viewed from the front, the discharge opening 34b is formed in a generally rectangular shape that is elongated laterally (see Figure 6A). The opening cross-sectional area S1 of the discharge opening 34b is set to be smaller than the opening cross-sectional area S3 of the drain port 36a of the drain channel member 36 (see Figure 5). The upper end of the discharge opening 34b is located below the upper surface portion 16f of the jet water guide channel 16, and the lower end of the discharge opening 34b is located above the bottom surface portion 16e of the jet water guide channel 16. Cleaning water that flows into the water guide member 34 is discharged from the discharge opening 34b into the jet water guide channel 16.

[0047] The receiving surface 34c of the water guide member 34 is inclined downward toward the front at a gentle angle and extends in a generally straight line. The receiving surface 34c is also positioned over the entire area obtained by projecting the drain port 36a of the drain channel member 36 vertically downward (see Figure 7). In other words, the receiving surface 34c is configured to receive all of the cleaning water discharged from the drain port 36a of the drain channel member 36. The receiving surface 34c is positioned to form a gap with respect to the bottom surface 16e of the jet water guide 16 and is positioned so as not to come into contact with the bottom surface 16e of the jet water guide 16. The receiving surface 34c is formed to be approximately parallel to the bottom surface 16e of the jet water guide 16. Furthermore, in a side cross-sectional view, the receiving surface 34c is inclined along the bottom surface 16e of the jet water guide 16 (see Figure 5). Furthermore, in a front cross-sectional view, the receiving surface portion 34c is formed along the bottom surface portion 16e of the jet water conduit 16, and is formed in a V-shape such that the left and right ends are higher and the center is the lowest (see Figures 6B and 6C). The front end of the receiving surface portion 34c is positioned behind and above the upper end 8e of the drain trap pipe 8.

[0048] The inclined surface portion 34d of the water guiding member 34 is inclined downward toward the front at a steep angle and extends in a generally straight line. The inclined surface portion 34d is located behind the center of the receiving surface portion 34c in the front-rear direction. The inclined surface portion 34d is located within the area obtained by projecting the drain port 36a of the drainage channel member 36 vertically downward (see Figure 7). The angle of inclination of the inclined surface portion 34d toward the horizontal is set to be greater than that of the receiving surface portion 34c on the front side. In the embodiment of the present invention, the inclined surface portion 34d extends in a generally straight line, but it may also be formed to curve with a predetermined radius of curvature.

[0049] As shown in Figure 5, the cross-sectional area of ​​the flow path cross-section (a cross-section perpendicular to the flow direction of the washing water) within the water guiding member 34 is set to gradually decrease toward the downstream side. Specifically, the cross-sectional area S2 of the flow path cross-section passing through the front lower end of the inner wall portion 36b of the drainage flow path member 36 is set to be smaller than the opening cross-sectional area S3 of the drain port 36a of the drainage flow path member 36. Also, the opening cross-sectional area S1 of the discharge port 34b is set to be smaller than the cross-sectional area S2 of the flow path cross-section passing through the front lower end of the inner wall portion 36b of the drainage flow path member 36. The opening cross-sectional area S3 of the drain port 36a of the drainage flow path member 36 is set to be approximately twice the opening cross-sectional area S1 of the discharge port 34b.

[0050] As shown in Figure 7, the water guide member 34 is positioned inside the opening edge of the jet drain port 26b of the outer tank 26 in a plan view. That is, when the inner tank 28 is attached to the outer tank 26, the water guide member 34, which is integrally formed with the inner tank 28, passes through the jet drain port 26b of the outer tank 26 (see Figure 3).

[0051] Next, the flushing operation of the flush toilet 1 according to an embodiment of the present invention will be described with reference to Figures 2, 8A to 8C. Figure 8A is a schematic diagram showing the flow of flushing water during the initial stage of flushing a toilet according to an embodiment of the present invention, Figure 8B is a schematic diagram showing the flow of flushing water during the middle stage of flushing a toilet according to an embodiment of the present invention, and Figure 8C is a schematic diagram showing the flow of flushing water during the final stage of flushing a toilet according to an embodiment of the present invention.

[0052] First, as shown in Figure 2, in the standby state before cleaning begins, the water W in the bowl section 24 and drain trap pipe 8 of the bowl section 6 has accumulated up to the initial water level WL0. Also, cleaning water has accumulated up to the initial water level WL0 in the jet water channel 16. Air has accumulated above the water W in the main channel 16a of the jet water channel 16.

[0053] Next, when the user operates the lever handle, the rim drain valve device (not shown) opens, and the cleaning water inside the outer tank 26 (and outside the inner tank 28) is discharged from the rim discharge port 10. After that, the jet drain valve device 33 opens, and the cleaning water inside the inner tank 28 is discharged from the jet discharge port 14.

[0054] As shown in Figure 8A, when the jet drain valve device 33 is opened, the cleaning water in the inner tank 28 is discharged from the drain port 36a of the drain channel member 36. The cleaning water discharged from the drain port 36a passes through the drain channel within the inner wall portion 36b of the drain channel member 36 and flows into the water guide member 34. The cleaning water that flows into the water guide member 34 flows along the inclined surface portion 34d of the water guide member 34. After that, the cleaning water flows over the V-shaped front receiving surface portion 34c and is discharged from the discharge opening 34b after being collected in the left-right center of the receiving surface portion 34c. In this way, turbulence is prevented from occurring when the cleaning water discharged from the jet drain port 4c of the cleaning water tank 4 collides with the bottom surface portion 16e of the jet water guide channel 16, and the cleaning water can be flowed in a straightened manner.

[0055] As shown in Figure 8B, over time, the air accumulated in the main channel 16a of the jet water conduit 16 escapes, increasing the flow rate of cleaning water passing through the discharge opening 34b and sealing the discharge opening 34b with cleaning water. At this point, air is unable to enter or exit the discharge opening 34b. Therefore, the air accumulated in the main channel 16a of the jet water conduit 16 is trapped within the jet water conduit 16 and remains in the air retention space S (the dashed line portion in Figure 8B) located above the main channel 16a of the jet water conduit 16. As a result, the cleaning water and air are separated within the main channel 16a of the jet water conduit 16, preventing air from being discharged from the jet discharge port 14 together with the cleaning water. When cleaning water is discharged from the jet discharge port 14 toward the inlet 8a of the drain trap pipe 8, the drain trap pipe 8 becomes full, a siphon effect occurs, and waste is discharged.

[0056] As shown in Figure 8C, when the accumulated water W drops to the lowest water level WL1 and the siphon action ends, the jet drain valve device 33 closes and the jet discharge stops. Subsequently, flushing water continues to be discharged from the rim outlet 10, and the accumulated water W rises to the initial water level WL0. After that, the rim drain valve device closes, water is supplied from the water supply valve device to the flushing water tank 4, and the toilet flushing is completed.

[0057] The effects and benefits of the embodiments of the present invention described above will be explained below. First, according to the flush toilet 1 of the embodiment of the present invention, a water guide member 34 is provided below the jet drain port 4c of the flush water tank 4 to guide at least a portion of the flush water discharged from the jet drain port 4c toward the jet water guide channel 16. This prevents the flush water discharged from the jet drain port 4c of the flush water tank 4 from colliding with the bottom surface 16e of the jet water guide channel 16 and generating turbulence, allowing the flush water to flow in a rectified manner. As a result, flush water can be stably supplied to the jet outlet 14, and waste can be reliably discharged.

[0058] Furthermore, according to the flush toilet 1 embodiment of the present invention, the water guide member 34 is provided with a discharge opening 34b for discharging flushing water toward the jet water guide 16, and the opening cross-sectional area of ​​this discharge opening 34b is set to be smaller than the opening cross-sectional area of ​​the drain port 36a of the drainage channel member 36, thereby preventing the generation of turbulence caused by the widening of the drainage channel through which the flushing water flows.

[0059] According to the flush toilet 1 of the embodiment of the present invention, the water guide member 34 is provided with a receiving surface portion 34c that receives at least a portion of the flushing water discharged from the jet drain port 4c, and this receiving surface portion 34c is provided with an inclined surface portion 34d that slopes downward in the direction in which the flushing water flows, so that the flushing water discharged from the jet drain port 4c of the flushing water tank 4 flows along the inclined surface portion 34d, the flushing water can be flowed in a more streamlined manner.

[0060] Furthermore, according to the flush toilet 1 embodiment of the present invention, the receiving surface portion 34c of the water guide member 34 is arranged to form a gap with respect to the bottom surface portion 16e of the jet water guide channel 16, so that the water guide member 34 can be installed inside the jet water guide channel 16 regardless of manufacturing variations in the shape of the jet water guide channel 16.

[0061] According to the flush toilet 1 embodiment of the present invention, the receiving surface portion 34c of the water guide member 34 is formed substantially parallel to the bottom surface portion 16e of the jet water guide channel 16. This reduces the gap between the receiving surface portion 34c of the water guide member 34 and the bottom surface portion 16e of the jet water guide channel 16, allowing flushing water to flow smoothly from the discharge opening of the water guide member 34 to the jet water guide channel 16.

[0062] Furthermore, according to the flush toilet 1 embodiment of the present invention, the water discharge opening 34b of the water guide member 34 is formed to open in the direction of the flow of the flushing water flowing in the jet water guide 16, so that the flushing water discharged from the water discharge opening 34b can be smoothly merged with the flushing water in the jet water guide 16.

[0063] According to the flush toilet 1 embodiment of the present invention, the water guide member 34 is positioned inside the opening edge of the jet drain port 4c of the flush water tank 4 in a plan view, so the water guide member 34 can be easily installed through the jet drain port 4c of the flush water tank.

[0064] Although embodiments of the present invention have been described above, various modifications can be made to the embodiments described above. [Explanation of Symbols]

[0065] 1: Flush toilet 2: Toilet bowl 4: Washing water tank 4a: Bottom of the washing water tank 4b: Drain for rim 4c: Drain outlet for jet 6: Bowl section 8: Drain trap pipe 8a: Inlet of drain trap pipe 10: Rim spout 12: Rim water conduit 14: Jet nozzle 16: Jet water conduit 26: Outer Tank 26a: Bottom of the outer tank 26b: Outer tank jet drain port 26c: Drainage port for the rim of the outer tank 28: Inner Tank 28a: Bottom of the inner tank 28b: Drain port for jets in the inner tank 30:Outer wall 33: Drain valve device for jets 34: Water guiding member 34a: Hanging wall portion of the water guiding member 34b: Discharge opening of water guide member 34c: Receiving surface of the water guiding member 34d: Inclined surface of the water guiding member 36: Drainage channel component 36a: Drain outlet of drainage channel member 36b: Inner wall portion of drainage channel member 36c: Valve seat of drainage channel component 36d: Communication opening for drainage channel member S: Air stagnation space S1: Cross-sectional area of ​​the water outlet opening S2: Cross-sectional area of ​​the flow channel cross-section S3: Cross-sectional area of ​​the drain opening of the drain channel member W:Retained water WL0: Initial water level of the reservoir WL1: Minimum water level of the reservoir

Claims

1. It is a siphon jet type flush toilet, A toilet bowl body comprising: a bowl section for receiving waste; a drain trap pipe connected below the bowl section for discharging waste; a jet nozzle provided below the bowl section for discharging cleaning water toward the inlet of the drain trap pipe; and a jet water channel for guiding cleaning water to the jet nozzle. A flushing water tank is provided for storing the flushing water supplied to the toilet bowl, and a drain is provided for discharging the stored flushing water into the toilet bowl. A drain valve device that opens and closes the drain port of the above-mentioned cleaning water tank, It has, A flush toilet, characterized in that a water guide member is provided below the drain of the flush water tank for guiding at least a portion of the flush water discharged from the drain toward the jet water channel.

2. The flush toilet according to claim 1, wherein the water guiding member is provided with a discharge opening for discharging flushing water toward the jet water channel, and the cross-sectional area of ​​the discharge opening is set to be smaller than the cross-sectional area of ​​the drain opening.

3. The flush toilet according to claim 2, wherein the water guiding member is provided with a receiving surface that receives at least a portion of the flushing water discharged from the drain, and the receiving surface is provided with an inclined surface that slopes downward in the direction in which the flushing water flows.

4. The flush toilet according to claim 1, wherein the receiving surface of the water guiding member is arranged to form a gap with respect to the bottom surface of the jet water channel.

5. The flush toilet according to claim 4, wherein the receiving surface of the water guiding member is formed substantially parallel to the bottom surface of the jet water channel.

6. The flush toilet according to claim 1, wherein the water discharge opening of the water guide member is formed to open in the direction of the flow of the flushing water flowing in the jet water guide channel.

7. The flush toilet according to claim 1, wherein the water guiding member is positioned on the inside of the opening edge of the drain port of the flush water tank in a plan view.

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