Water-washable toilet

Abstract

The present invention aims to provide a flush toilet in which the water supply member can be easily fixed to the toilet bowl body while suppressing the occurrence of water leakage and the increase in manufacturing costs. [Solution] The present invention comprises a toilet bowl body 2 having a bowl portion 6 for receiving waste, a jet outlet 14 for discharging flushing water, a jet water channel 16 for guiding flushing water to the jet outlet 14, and a drain trap pipe 8; a flushing water tank 4 for storing flushing water supplied to the toilet bowl body 2 and having a jet drain outlet 4c formed therein for discharging the stored flushing water to the toilet bowl body 2; a drain valve device 33; a water guide member 34 provided below the jet drain outlet 4c of the flushing water tank 4 for guiding flushing water from the jet drain outlet 4c of the flushing water tank 4 to the jet water channel 16; and fixing parts 38, 40 for fixing the water guide member 34 to the toilet bowl body 2, the fixing parts 38, 40 being provided inside the jet drain outlet 4c of the flushing water tank 4.

Description

TECHNICAL FIELD

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet that flushes with flushing water to discharge waste.

BACKGROUND ART

[0002] Conventionally, as described in Patent Document 1, a siphon jet type flush toilet is known which generates a siphon action by jet water spout to discharge waste. Such a flush toilet includes a jet spout that is provided below the bowl portion and spouts flushing water toward the inlet of the drain trap pipeline, and a jet water conduit that is connected to the flushing water tank and supplies flushing water to the jet spout. When flushing water is supplied from the flushing water tank to the jet water conduit, the flushing water flows through the jet water conduit and is spouted from the jet spout. The flushing water spouted from the jet spout flows into the drain trap pipeline 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] Here, in the flush toilet described in Patent Document 1 mentioned above, in order to stably supply flushing water to the jet outlet, it is conceivable to install, for example, a resin water guide member in the jet water channel and guide the flushing water toward the jet outlet using the water guide member. Such a water guide member has the advantage of being able to stably supply flushing water to the jet outlet because it does not experience manufacturing variations compared to a ceramic water channel. Furthermore, as a method of fixing the water guide member to the toilet bowl body, it is conceivable to form fixing holes in the toilet bowl body for fixing the water guide member and fix the water guide member to the toilet bowl body with bolts or the like. However, forming fixing holes in the toilet bowl body has the problem that flushing water may leak from these fixing holes and that manufacturing costs in the manufacturing process will increase.

[0005] Therefore, the present invention aims to provide a flush toilet in which the water guiding member can be easily fixed to the toilet bowl body while suppressing the occurrence of water leakage and the increase in manufacturing costs. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a flush toilet that washes and discharges waste using flushing water, comprising: a toilet body having a bowl portion for receiving waste, a water outlet provided in the bowl portion for discharging flushing water, a water conduit for guiding flushing water to the water outlet, and a drain trap pipe connected to the lower part of the bowl portion for discharging waste; a flushing water tank for storing flushing water supplied to the toilet body and having a drain port for discharging the stored flushing water to the toilet body; a drain valve device for opening and closing the drain port of the flushing water tank; a water conduit provided below the drain port of the flushing water tank for guiding flushing water from the drain port of the flushing water tank to the water conduit; and a fixing part for fixing the water conduit to the toilet body, wherein the fixing part is provided inside the drain port of the flushing water tank.

[0007] According to the present invention configured in this way, since the fixing portion of the water guide member is provided inside the drain port of the flushing water tank, there is no need to form fixing holes in the toilet bowl body. Therefore, the water guide member can be fixed to the toilet bowl body while suppressing the occurrence of water leakage and an increase in manufacturing costs.

[0008] In the present invention, preferably, the fixing portion comprises a fastener, a fixing hole provided in the drain opening into which the fastener is inserted, and a retaining clip that connects with the fastener and abuts against the back surface of the toilet bowl body.

[0009] According to the present invention configured in this way, the fixing portion includes a fastener, a fixing hole provided in the drain opening into which the fastener is inserted, and a retaining clip that connects with the fastener and abuts against the back surface of the toilet bowl body, so that the water supply member can be easily fixed to the toilet bowl body.

[0010] Furthermore, in the present invention, preferably, the water discharge opening of the water guide member is an opening for discharging cleaning water into the water guide channel, and is also an opening for fixing the water guide member to the toilet bowl body by a fixing part.

[0011] According to the present invention configured in this way, the water discharge opening of the water guide member is an opening for discharging cleaning water into the water guide channel, and also an opening for fixing the water guide member to the toilet bowl body by the fixing part. Therefore, the water guide member can be fixed to the toilet bowl body by utilizing the water discharge opening of the water guide member.

[0012] In the present invention, preferably, the fixing portion is provided at the left or right end of the water discharge opening.

[0013] According to the present invention configured in this way, since the fixing part is provided at the left or right end of the water discharge opening, it is possible to suppress obstruction of the flow of cleaning water within the water guiding member by the fixing part.

[0014] Furthermore, in the present invention, the water guiding member is provided with a fixing opening for fixing the water guiding member to the toilet bowl body by a fixing part, in addition to the water discharge opening of the water guiding member.

[0015] According to the present invention configured in this manner, the water guiding member is provided with a fixing opening for fixing the water guiding member to the toilet bowl body by a fixing part, in addition to the water discharge opening of the water guiding member, so that the water guiding member can be stably fixed to the toilet bowl body.

[0016] In the present invention, the fixing opening is formed to the minimum size necessary for the fastener of the fixing part to pass through.

[0017] According to the present invention configured in this way, the fixing opening is formed to the minimum size through which the fasteners of the fixing part can pass, thus preventing obstruction of the flow of cleaning water in the water guiding member by the fixing opening.

[0018] Furthermore, in this invention, the water discharge opening is located on the front side of the water guiding member, and the fixing opening is located on the rear side of the water guiding member.

[0019] According to the present invention configured in this manner, the water discharge opening is located on the front side of the water guiding member, and the fixing opening is located on the rear side of the water guiding member. Therefore, obstruction of the flow of cleaning water within the water guiding member by the fixing opening can be further suppressed.

[0020] In the present invention, the fixing portion is positioned at locations other than the left and right ends of the drain port of the washing water tank.

[0021] According to the present invention configured in this way, the fixed portion is positioned at locations other than the left and right ends of the drain port of the washing water tank, so the width of the water conduit in the left-right direction can be reduced.

[0022] Furthermore, in the present invention, the fixing portion is positioned above the upper end of the water discharge opening of the water guiding member.

[0023] According to the present invention configured in this manner, the fixing portion is positioned above the upper end of the water discharge opening of the water guide member, thereby preventing obstruction of the flow of cleaning water discharged from the water discharge opening by the fixing portion.

[0024] In the present invention, the fixing portion is disposed below the valve seat on which the valve body of the drain valve device sits or separates from.

[0025] According to the present invention configured as described above, since the fixing portion is disposed below the valve seat on which the valve body of the drain valve device sits or separates from, it is possible to reliably prevent water from leaking out of the toilet bowl from the fixing portion.

[0026] Further, in the present invention, the water guide member is provided with a slit portion for restricting the fastener from rotating together with the fastener when the fastener is rotated.

[0027] According to the present invention configured as described above, since the water guide member is provided with the slit portion for restricting the fastener from rotating together with the fastener when the fastener is rotated, the water guide member can be easily fixed to the toilet body.

[0028] In the present invention, the water guide member is provided with a stopper portion for stopping the fastener inside the water guide member when the fastener moves below the slit portion.

[0029] According to the present invention configured as described above, since the water guide member is provided with the stopper portion for stopping the fastener inside the water guide member when the fastener moves below the slit portion, when the washing water tank is viewed from above and the fastener is rotated in the loosening direction, the fastener appears inside the water guide member and stops, so that the timing to remove the water guide member can be easily confirmed. Effects of the Invention

[0030] According to the flush toilet of the present invention, the present invention can easily fix the water guide member to the toilet body while suppressing the occurrence of water leakage and the increase in manufacturing cost. Brief Description of the Drawings

[0031] [Figure 1]This is a plan view of a flush toilet according to an embodiment of the present invention. [Figure 2] This is a cross-sectional view along line II-II in Figure 1. [Figure 3] This is a disassembled perspective view of the flushing water tank of a flush toilet according to an embodiment of the present invention. [Figure 4] This is a cross-sectional view along line IV-IV in Figure 1. [Figure 5] This is a cross-sectional view along the VV line in Figure 4. [Figure 6A] This is a perspective view of the water supply member of a flush toilet according to an embodiment of the present invention, viewed from the lower left front. [Figure 6B] This is a perspective view of the water supply member of a flush toilet according to an embodiment of the present invention, viewed from the lower right rear. [Figure 7] This is a cross-sectional view along line VII-VII in Figure 2. [Figure 8] This is a plan view of the water supply member of a flush toilet according to an embodiment of the present invention, as seen from above. [Figure 9A] This diagram shows the procedure for attaching the water guide member of a flush toilet according to an embodiment of the present invention to the toilet bowl body, and shows the water guide member inserted into the jet water guide channel. [Figure 9B] This diagram shows the procedure for attaching the water supply member of a flush toilet according to an embodiment of the present invention to the toilet bowl body, and illustrates the state in which the fixing bracket of the fixing part is rotating. [Figure 9C] This diagram shows the procedure for attaching the water supply member of a flush toilet according to an embodiment of the present invention to the toilet bowl body, and illustrates the state in which the fixing bracket of the fixing part is raised. [Figure 9D] This diagram shows the procedure for attaching the water guide member of a flush toilet according to an embodiment of the present invention to the toilet bowl body, and represents the state after the water guide member has been attached. [Modes for carrying out the invention]

[0032] A flush toilet according to an embodiment of the present invention will be described below with reference to the drawings. First, the basic structure of the flush toilet 1 according to an embodiment of the present invention will be described with reference to Figures 1 to 3. Figure 1 is a plan view of a flush toilet according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along line II-II in Figure 1, and Figure 3 is an exploded perspective view of a flush toilet according to an embodiment of the present invention. In Figures 1 and 2, the rim water channel and the jet water channel are indicated by dashed lines, respectively. In this specification, when viewing a flush toilet from the front, the front side is referred to as the front, the back side as the rear, the right side as the right, and the left side as the left. When viewing a flush toilet from above, the center side of the toilet is referred to as the inside, and the outer casing side of the toilet is referred to as the outside.

[0033] 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 discharges waste by generating a siphon action through a jet of water.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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).

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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. In the flush toilet 1 according to the embodiment of the present invention, flushing water from the flushing water tank 4 is supplied to the jet water channel 16. However, the jet water channel 16 may be directly connected to a water source such as a water supply, and flushing water from the water source such as a water supply may be directly supplied to the jet water channel 16.

[0042] 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. In the flush toilet bowl 1 according to the embodiment of the present invention, the flushing water tank 4 comprises an outer tank 26 and an inner tank 28, but it may also consist of only the outer tank 26 without the inner tank 28, or only the inner tank 28 without the outer tank 26.

[0043] 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.

[0044] 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 formed integrally 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.

[0045] 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. A drainage channel is also 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. 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 component from the inner tank 28.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Next, with reference to Figures 2, 4 to 8, the water supply member 34 of the flush toilet 1 according to an embodiment of the present invention will be described in detail. Figure 4 is a cross-sectional view along the line IV-IV in Figure 1, Figure 5 is a cross-sectional view along the line VV in Figure 4, Figure 6A is a perspective view of the water guide member of a flush toilet according to an embodiment of the present invention, viewed from the lower left front, Figure 6B is a perspective view of the water guide member of a flush toilet according to an embodiment of the present invention, viewed from the lower right rear, Figure 7 is a cross-sectional view along the line VII-VII in Figure 2, and Figure 8 is a plan view of the water guide member of a flush toilet according to an embodiment of the present invention, viewed from above.

[0053] As shown in Figure 2, 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 in a rectified manner.

[0054] The water guiding member 34 includes, 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, which is set to have a larger angle of inclination downward with respect to the horizontal direction compared to the front receiving surface portion 34c.

[0055] 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.

[0056] 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 and flattened. 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.

[0057] The receiving surface 34c of the water guiding member 34 is positioned over the entire area obtained by projecting the drain port 36a of the drain channel member 36 vertically downward. That is, 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 guiding channel 16, and is positioned so as not to come into contact with the bottom surface 16e of the jet water guiding channel 16. The receiving surface 34c is formed to be approximately parallel to the bottom surface 16e of the jet water guiding channel 16.

[0058] As shown in Figure 4, the water guiding member 34 is provided with two fixing parts 38 and 40 for fixing the water guiding member 34 to the toilet bowl body 2. Each fixing part 38 and 40 includes fixing screws (fasteners) 38a and 40a, fixing holes 38b and 40b into which the fixing screws 38a and 40a are inserted, fixing brackets (fasteners) 38c and 40c that abut against the back surface of the toilet bowl body 2, slits 38d and 40d to restrict the fixing brackets 38c and 40c from rotating together with the fixing screws 38a and 40a when the fixing screws 38a and 40a are rotated, and stopper parts 38e and 40e to stop the fixing brackets 38c and 40c in the jet drain port 4c of the flushing water tank 4 when the fixing brackets 38c and 40c move below the slits 38d and 40d.

[0059] As shown in Figure 5, each fixing hole 38b, 40b is provided within the jet drain port 4c of the cleaning water tank 4 (the jet drain port 26b of the outer tank 26). Each fixing hole 38b, 40b is formed to protrude from the inner circumferential surface of the hanging wall portion 34a of the water guide member 34 into the drainage channel through which the cleaning water flows. The fixing hole 38b is located on the left front side of the water guide member 34, and the fixing hole 40b is located on the right rear side of the water guide member 34. Each fixing hole 38b, 40b is located on the center line CL1 passing through the center O of the jet drain port 4c of the cleaning water tank 4.

[0060] Each fixing screw 38a, 40a comprises a head and a threaded portion extending vertically downward from the head, with a male thread formed thereon. Each fixing screw 38a, 40a is inserted into each fixing hole 38b, 40b from above, with the head contacting the upper surface of each fixing hole 38b, 40b and the threaded portion passing through each fixing hole 38b, 40b.

[0061] Each fixing bracket 38c, 40c comprises a metal body formed in the shape of a rectangular parallelepiped, and a through hole formed at one end of the body with a female thread. The threaded portion of each fixing screw 38a, 40a is screwed into the through hole of each fixing bracket 38c, 40c. When each fixing screw 38a, 40a is rotated in the tightening direction, the threaded portion of each fixing bracket 38c, 40c rises, and the upper surface of each fixing bracket 38c, 40c comes into contact with the back surface of the toilet bowl body 2. As a result, the toilet bowl body 2 is sandwiched between the bottom surface 28a of the inner tank 28 and the fixing bracket 38c, and the water guide member 34 is fixed to the toilet bowl body 2. On the other hand, when each fixing screw 38a, 40a is rotated in the loosening direction, the threaded portion of each fixing bracket 38c, 40c descends, and the upper surface of each fixing bracket 38c, 40c separates from the back surface of the toilet bowl body 2.

[0062] As shown in Figure 6A, the fixing portion 38 is provided at the left end of the water discharge opening 34b, which is located on the front side of the water guiding member 34. The fixing portion 38 is also provided above the upper end of the water discharge opening 34b (see Figure 4). Furthermore, the fixing portion 38 is positioned below the valve seat 36c on which the valve body of the jet drain valve device 33 sits or lifts (see Figure 4).

[0063] The slit portion 38d of the fixing portion 38 is formed by a concave slit (groove) large enough for the fixing fitting 38c to pass through, and extends vertically upward from the upper left corner of the water discharge opening 34b. When the fixing fitting 38c is inserted into the slit portion 38d, the rotation of the fixing fitting 38c is restricted by the inner surface of the slit portion 38d, preventing the fixing fitting 38c from rotating together with the fixing screw 38a. A stopper portion 38e is provided at the left end of the water discharge opening 34b below the slit portion 38d. The stopper portion 38e is the left end of the water discharge opening 34b. After the fixing screw 38a is rotated in the loosening direction and the fixing fitting 38c descends below the slit portion 38d, the stopper portion 38e restricts the rotation of the fixing fitting 38c, stopping the fixing fitting 38c within the water guiding member 34.

[0064] As shown in Figure 6B, a fixing opening 42 is provided on the rear side of the water guide member 34, separate from the water discharge opening 34b, for fixing the water guide member 34 to the toilet bowl body 2 by a fixing part 40. This fixing opening 42 is formed in a horizontally elongated, flat shape and is formed to the minimum size (slightly larger than the side surface of the fixing fitting 40c) that the fixing part 40 can pass through. The fixing part 40 is provided at the right end of the fixing opening 42. Furthermore, the fixing part 40 is provided above the upper end of the water discharge opening 34b (see Figure 4). In addition, the fixing part 40 is positioned below the valve seat 36c on which the valve body of the jet drain valve device 33 sits or lifts (see Figure 4).

[0065] The slit portion 40d of the fixing portion 40 is formed by a concave slit (groove) large enough for the fixing fitting 40c to pass through, and extends vertically upward from the upper right corner of the fixing opening 42. When the fixing fitting 40c is inserted into the slit portion 40d, the rotation of the fixing fitting 40c is restricted by the inner surface of the slit portion 40d, preventing the fixing fitting 40c from rotating together with the fixing screw 40a. A stopper portion 40e is provided at the right end of the fixing opening 42 below the slit portion 40d. The stopper portion 40e is the right end of the fixing opening 42. After the fixing screw 40a is rotated in the loosening direction and the fixing fitting 40c descends below the slit portion 40d, the stopper portion 40e restricts the rotation of the fixing fitting 40c, stopping the fixing fitting 40c inside the water guiding member 34.

[0066] As shown in Figure 7, the fixing parts 38 and 40 are positioned at locations other than the left and right ends of the jet drain port 4c of the cleaning water tank 4 (see the dotted line in Figure 7). Specifically, the fixing parts 38 and 40 are not positioned on the center line CL2 that bisects the jet drain port 4c of the cleaning water tank in the front-to-back direction. Fixing part 38 is positioned in front of the center line CL2 of the jet drain port 4c of the cleaning water tank, and fixing part 40 is positioned behind the center line CL2 of the jet drain port 4c of the cleaning water tank. This makes it possible to reduce the width of the jet water channel 16 in the left-to-right direction compared to the case where the fixing parts 38 and 40 are at the left and right ends (on the center line CL2) of the jet drain port 4c.

[0067] As shown in Figure 8, the fixing brackets 38c and 40c of the fixing parts 38 and 40 are in contact with the stopper parts 38e and 40e and are stopped inside the jet drain port 4c of the cleaning water tank 4 (see the dotted line in Figure 8). In other words, the fixing brackets 38c and 40c are stopped in a position visible from the jet drain port 28b of the inner tank 28. As a result, when removing the inner tank 28 and the water guide member 34 from the outer tank 26, when looking into the cleaning water tank 4 from above, as the fixing screws 38a and 40a are rotated in the direction of loosening, the fixing brackets 38c and 40c will appear inside the water guide member 34 and stop, making it easy to confirm the timing for removing the water guide member 34.

[0068] Next, with reference to Figures 9A to 9D, the procedure for attaching the water supply member 34 of the flush toilet 1 to the toilet body 2 according to an embodiment of the present invention will be described. Figures 9A to 9D illustrate the procedure for attaching the water guide member of a flush toilet according to an embodiment of the present invention to the toilet bowl body. Figure 9A shows the water guide member inserted into the jet water guide channel. Figure 9B shows the fixing bracket of the fixing part rotating. Figure 9C shows the fixing bracket of the fixing part rising. Figure 9D shows the completed installation of the water guide member.

[0069] First, as shown in Figure 9A, fixing screws 38a and 40a pass through fixing holes 38b and 40b, and fixing brackets 38c and 40c are connected to the lower ends of fixing screws 38a and 40a. The fixing brackets 38c and 40c are located inside the water guiding member 34. With the fixing brackets 38c and 40c located inside the water guiding member 34, the water guiding member 34 is inserted into the jet water channel 16 from the jet drain port 4c of the cleaning water tank 4.

[0070] Next, as shown in Figure 9B, when the fixing screw 38a is rotated in the tightening direction, the fixing bracket 38c rotates through the water discharge opening 34b and contacts the left end of the water discharge opening 34b. At this time, the fixing bracket 38c protrudes outside the water guiding member 34. Also, when the fixing screw 40a is rotated in the tightening direction, the fixing bracket 40c rotates through the fixing opening 42 and contacts the left end of the fixing opening 42. At this time, the fixing bracket 40c protrudes outside the water guiding member 34.

[0071] Furthermore, as shown in Figure 9C, when the fixing screw 38a is rotated in the tightening direction, the rotation of the fixing bracket 38c is restricted by the left end of the water outlet opening 34b, causing the fixing bracket 38c to rise. When the fixing screw 38a is rotated further in the tightening direction, the rotation of the fixing bracket 38c is restricted by the inner surface of the slit portion 38d, causing the fixing bracket 38c to rise along the slit portion 38d. This prevents the fixing bracket 38c from rotating together with the fixing screw 38a. Similarly, when the fixing screw 40a is rotated in the tightening direction, the fixing bracket 40c rises along the slit portion 40d.

[0072] Finally, as shown in Figure 9D, when the fixing brackets 38c and 40c come into contact with the back surface of the toilet bowl body 2, the toilet bowl body 2 is sandwiched between the bottom surface 28a of the inner tank 28 and the fixing brackets 38c, and the water supply member 34 is fixed to the toilet bowl body 2. This completes the attachment of the water supply member 34 to the toilet bowl body 2.

[0073] The effects and benefits of the embodiments of the present invention described above will be explained below. First, according to the flush toilet 1 embodiment of the present invention, the fixing portions 38 and 40 of the water guide member 34 are provided inside the jet drain port 4c of the flush water tank 4. Therefore, there is no need to form fixing holes in the toilet body 2, and the water guide member 34 can be fixed to the toilet body 2 while suppressing the occurrence of water leakage and an increase in manufacturing costs.

[0074] Furthermore, according to the flush toilet 1 embodiment of the present invention, the fixing parts 38 and 40 include fixing screws 38a and 40a, fixing holes 38b and 40b provided in the jet drain port 4c of the flush water tank 4 into which the fixing screws 38a and 40a are inserted, and fixing brackets 38c and 40c that are connected to the fixing screws 38a and 40a and come into contact with the back surface of the toilet body 2, so that the water guide member 34 can be easily fixed to the toilet body 2.

[0075] In the flush toilet 1 embodiment of the present invention, the water discharge opening 34b of the water guide member 34 is an opening for discharging flushing water into the water guide channel, and is also an opening for fixing the water guide member 34 to the toilet body 2 by the fixing part 38. Therefore, the water guide member 34 can be fixed to the toilet body 2 by utilizing the water discharge opening 34b of the water guide member 34.

[0076] Furthermore, according to the flush toilet 1 embodiment of the present invention, since the fixing part 38 is provided at the left end (or right end) of the water discharge opening 34b, it is possible to suppress obstruction of the flow of flushing water in the water guide member 34 by the fixing part 38.

[0077] In the flush toilet 1 embodiment of the present invention, the water guide member 34 is provided with a fixing opening 42 for fixing the water guide member 34 to the toilet body 2 by a fixing part 40, in addition to the water discharge opening 34b of the water guide member 34, so that the water guide member 34 can be stably fixed to the toilet body 2.

[0078] Furthermore, according to the flush toilet 1 embodiment of the present invention, the fixing opening 42 is formed to the minimum size through which the fixing fittings 38c and 40c of the fixing part 40 can pass, thereby preventing obstruction of the flow of flushing water in the water guide member 34 by the fixing opening 42.

[0079] According to the flush toilet 1 embodiment of the present invention, the water discharge opening 34b is located on the front side of the water guide member 34, and the fixing opening 42 is located on the rear side of the water guide member 34. Therefore, obstruction of the flow of flushing water within the water guide member 34 by the fixing opening 42 can be further suppressed.

[0080] Furthermore, according to the flush toilet 1 of the embodiment of the present invention, the fixing parts 38 and 40 are positioned at locations other than the left and right ends of the jet drain port 4c of the flushing water tank 4, so the width of the jet water channel 16 in the left-right direction can be reduced.

[0081] According to the flush toilet 1 embodiment of the present invention, the fixing parts 38 and 40 are positioned above the upper end of the water discharge opening 34b of the water guide member 34, so that the flow of flushing water discharged from the water discharge opening 34b is not obstructed by the fixing parts 38 and 40.

[0082] Furthermore, according to the flush toilet 1 embodiment of the present invention, the fixing parts 38 and 40 are positioned below the valve seat 36c of the drainage channel member 36 on which the valve body of the drain valve device sits or lifts off, thus reliably preventing water from leaking outside the toilet bowl from the fixing parts 38 and 40.

[0083] According to the flush toilet 1 embodiment of the present invention, the water guide member 34 is provided with slits 38d and 40d to restrict the fixing brackets 38c and 40c from rotating together with the fixing screws 38a and 40a when the fixing screws 38a and 40a are rotated, so that the water guide member 34 can be easily fixed to the toilet body 2.

[0084] Furthermore, according to the flush toilet 1 embodiment of the present invention, the water guide member 34 is provided with stopper portions 38e and 40e to stop the fixing brackets 38c and 40c inside the water guide member 34 when they move below the slit portions 38d and 40d. Therefore, when looking into the flush water tank 4 from above, rotating the fixing screws 38a and 40a in the loosening direction will cause the fixing brackets 38c and 40c to appear inside the water guide member 34 and stop, making it easy to confirm the timing for removing the water guide member 34.

[0085] In the embodiment of the present invention, the water guiding member 34 is shown to be provided in the jet water channel 16, but the water guiding member 34 may also be provided in the rim water channel 12.

[0086] Although embodiments of the present invention have been described above, various modifications can be made to the embodiments described above. [Explanation of Symbols]

[0087] 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 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 38,40:Fixed part 38a, 40a: Fixing screws 38b,40b:Fixing hole part 38c, 40c: Fixing hardware 38d, 40d: Slit section 38e, 40e: Stopper part 40:Fixed part 42: Fixing opening W:Retained water WL0: Initial water level of the reservoir

Claims

1. A flush toilet that uses flushing water to wash away waste, A toilet bowl body comprising a bowl section for receiving waste, a spout provided in the bowl section for discharging flushing water, a water channel for guiding the flushing water to the spout, and a drain trap pipe connected to the bottom of the bowl section for discharging waste, 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, A water guide member is provided below the drain port of the above-mentioned cleaning water tank, for guiding the cleaning water from the drain port of the above-mentioned cleaning water tank to the above-mentioned water guide channel, A fixing part for fixing the above water supply member to the toilet bowl body, It has, A flush toilet characterized in that the above-mentioned fixing part is provided inside the drain port of the above-mentioned flush water tank.

2. The flush toilet according to claim 1, wherein the fixing part comprises a fastener, a fixing hole provided in the drain opening into which the fastener is inserted, and a retaining clip that connects with the fastener and contacts the back surface of the toilet bowl body.

3. The flush toilet according to claim 2, wherein the water discharge opening of the water guide member is an opening for discharging flushing water into the water guide channel and is also an opening for fixing the water guide member to the toilet bowl body by the fixing part.

4. The above-mentioned fixing part is provided at the left end or the right end of the above-mentioned water outlet opening, as described in claim 3.

5. The flush toilet according to claim 3 or 4, wherein the water guiding member is provided with a fixing opening for fixing the water guiding member to the toilet bowl body by the fixing part, in addition to the water discharge opening of the water guiding member.

6. The flush toilet according to claim 5, wherein the fixing opening is formed to the minimum size through which the fastener of the fixing part can pass.

7. The flush toilet according to claim 5, wherein the water discharge opening is located on the front side of the water guide member, and the fixing opening is located on the rear side of the water guide member.

8. The flush toilet according to claim 5, wherein the fixing part is positioned at a location other than the left end and right end of the drain port of the flush water tank.

9. The flush toilet according to any one of claims 1 to 3, wherein the fixing part is positioned above the upper end of the water discharge opening of the water guide member.

10. The flush toilet according to any one of claims 1 to 3, wherein the fixing part is positioned below the valve seat on which the valve body of the drain valve device sits or lifts off.

11. The flush toilet according to claim 2, wherein the water guiding member is provided with a slit portion for restricting the fastener from rotating together with the fastener when the fastener is rotated.

12. The flush toilet according to claim 11, wherein the water guiding member is provided with a stopper portion for stopping the fastener inside the water guiding member when the fastener moves below the slit portion.

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