Water-washable toilet

Abstract

The present invention aims to provide a flush toilet that can prevent condensation from forming while suppressing the increase in cost due to the overall enlargement of the tank. [Solution] The present invention relates to a flush toilet 1 that washes with flushing water and discharges waste, comprising a flushing water tank 22 for storing flushing water, a bowl portion 8 for receiving waste, a water outlet 20 for discharging flushing water into the bowl portion 8, and a drain trap pipe 12 connected below the bowl portion 8 for discharging waste, wherein a cover member 34 is provided on the bottom portion 22a of the flushing water tank 22 that covers the bottom portion 22a of the flushing water tank 22 from below, and a sealed space S is formed between the bottom portion 22a of the flushing water tank 22 and the cover member 34.

Description

[TECHNICAL FIELD]

[0001] The present invention relates to a flush toilet, and particularly to a flush toilet that is cleaned with flush water to discharge filth. [BACKGROUND ART]

[0002] Conventionally, as described in Patent Document 1, there has been known a flush toilet including a toilet body, a flush water tank provided at an upper rear portion of the toilet body for storing flush water, and a condensation-proof member that covers an outer surface of the flush water tank and prevents generation of dew condensation.

[0003] Further, as described in Patent Document 2, there has been known a flush toilet including a toilet body, a tank body provided at an upper rear portion of the toilet body for storing flush water, and a base plate for fixing the tank body to the toilet body. The base plate is provided between the toilet body and the tank body, and covers a bottom surface portion of the tank body from below. Thereby, condensed water flowing down along the outer surface of the tank body is received by the base plate and caused to flow into the toilet body. [PRIOR ART DOCUMENTS] [Patent Documents]

[0004] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2020-128653 [Patent Document 2] Japanese Unexamined Patent Application Publication No. 2016-191241 [SUMMARY OF THE INVENTION] [Problem to be Solved by the Invention]

[0005] However, in the flush toilet described in the aforementioned Patent Document 1, since the flush water tank is covered with the condensation-proof member, there is a problem in that the entire tank is increased in size, resulting in increased cost.

[0006] On the other hand, in the flush toilet described in Patent Document 2 mentioned above, the flushing water tank is not covered with a condensation-preventing material, and condensation water is received by the base plate. This prevents the overall tank from becoming larger and thus increases costs, but it does not prevent the generation of condensation water itself.

[0007] Therefore, the present invention was made to solve the above-mentioned problems, and aims to provide a flush toilet that can prevent condensation from forming while suppressing the increase in cost due to the enlargement of the entire tank. [Means for solving the problem]

[0008] To achieve the above objective, the present invention provides a flush toilet that washes with flushing water and discharges waste, comprising a flushing water tank for storing flushing water, a bowl portion for receiving waste, a water outlet for discharging flushing water into the bowl portion, and a toilet body connected to the bottom of the bowl portion and comprising a drain trap pipe for discharging waste, wherein a cover member is provided on the bottom of the flushing water tank to cover the bottom of the flushing water tank from below, and a sealed space is formed between the bottom of the flushing water tank and the cover member.

[0009] With the present invention configured in this way, a cover member is provided on the bottom of the cleaning water tank to cover the bottom of the cleaning water tank from below, and a sealed space is formed between the bottom of the cleaning water tank and the cover member. As a result, an air layer is formed between the bottom of the cleaning water tank and the cover member, and the insulating effect of this air layer prevents condensation from forming on the outer surface of the bottom of the cleaning water tank. Therefore, it is possible to prevent the formation of condensation while suppressing an increase in the overall size and cost of the tank.

[0010] In the present invention, preferably, the sealed space is divided into multiple spaces. In the present invention configured in this way, the sealed space is divided into multiple spaces, which further improves the thermal insulation effect of the air layer.

[0011] Furthermore, in the present invention, preferably, the bottom surface of the washing water tank is provided with ribs to form a sealed space, and this rib forms a sealed space. In the present invention configured in this way, ribs are provided on the bottom surface of the washing water tank to form a sealed space, and since a sealed space is formed by these ribs, the strength of the washing water tank can be improved while obtaining the heat insulating effect of the air layer.

[0012] In the present invention, preferably, the sealed space is formed in a region inside the outer peripheral edge of the bottom surface of the washing water tank. In the present invention configured in this way, the sealed space is formed in an area inside the outer edge of the bottom surface of the cleaning water tank, so that condensation can be reliably prevented from forming on the outer surface of the bottom surface of the cleaning water tank.

[0013] Furthermore, in the present invention, preferably, the flushing water tank is provided at the rear upper part of the toilet bowl body, and the sealed space is formed in an area outside the outer peripheral edge of the rear upper part of the toilet bowl body. In the present invention configured as described above, the flushing water tank is located at the upper rear of the toilet bowl, and the sealed space is formed in an area outside the outer peripheral edge of the upper rear of the toilet bowl. This prevents condensation from forming on the outer surface of the bottom of the flushing water tank, which is located in an area outside the outer peripheral edge of the upper rear of the toilet bowl, thereby preventing the condensation from dripping outside the toilet bowl.

[0014] In the present invention, preferably, the cover member extends to an area outside the outer peripheral edge of the bottom surface of the washing water tank. In the present invention configured in this way, the cover member extends to an area outside the outer peripheral edge of the bottom surface of the cleaning water tank, so that condensation water generated on the side surface of the cleaning water tank can be received by the cover member. [Effects of the Invention]

[0015] According to the flush toilet of the present invention, the generation of condensed water can be prevented while suppressing an increase in cost caused by an increase in size of the entire tank. [Brief Description of the Drawings]

[0016] [Figure 1] FIG. 1 is a side cross-sectional view of a flush toilet according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front cross-sectional view of a flush water tank device of the flush toilet according to an embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 4 is a perspective view of a cover member of the flush toilet according to an embodiment of the present invention. [Figure 5] FIG. 5 is a bottom view of the flush water tank device of the flush toilet according to an embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged view of part A in FIG. 2. [Figure 7] FIG. 7 is a plan view showing a state where the cover member of the flush toilet according to an embodiment of the present invention is attached to the flush water tank device. [Figure 8] FIG. 8 is a bottom view showing a state where the cover member of the flush toilet according to an embodiment of the present invention is attached to the flush water tank device. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 1. [Mode for Carrying Out the Invention]

[0017] Hereinafter, a flush toilet according to an embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to the drawings. First, the overall structure of the flush toilet according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a side cross-sectional view of the flush toilet according to an embodiment of the present invention, FIG. 2 is a front cross-sectional view of the flush water tank of the flush toilet according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. In this specification, when a user is viewing a flush toilet from the front, the front of the toilet is referred to as "front," the back as "rear," the right side as "right," and the left side as "left."

[0018] As shown in Figure 1, the flush toilet 1 comprises a ceramic toilet bowl 2, a local bidet device 4 placed on the top surface of the toilet bowl 2, and a flush water tank device 6 that stores the flushing water supplied to the toilet bowl 2. Furthermore, the flush toilet 1 is a siphon-type toilet that discharges waste through a siphon action. In this embodiment, an example of applying the present invention to a siphon toilet is shown, but the present invention can also be applied to washdown toilets that use the flowing water action caused by the difference in water pressure to wash away waste, and siphon jet toilets that use a jet of water to quickly generate a siphon action and discharge waste.

[0019] The toilet bowl body 2 is provided with a bowl portion 8 for receiving waste, a flushing water channel 10 located behind the bowl portion 8 for guiding flushing water supplied from the flushing water tank device 6 to the bowl portion 8, and a drain trap pipe 12 connected to the bottom of the bowl portion 8 for discharging waste. The bowl portion 8 is provided with a waste receiving surface 14 for receiving waste, a rim portion 16 formed above the waste receiving surface 14, a pot portion 18 formed below the waste receiving surface 14 with a water reservoir W formed inside, and a first rim outlet 20 and a second rim outlet (not shown) for discharging flushing water supplied from the flushing water channel 10. The first rim outlet 20 is located to the front left of the bowl portion 8 in a plan view and discharges flushing water forward, and the second rim outlet is located to the rear right of the bowl portion 8 in a plan view and is configured to discharge flushing water backward.

[0020] The drain trap pipeline 12 consists of an inlet 12a, an introduction pipeline 12b descending from the inlet 12a, an ascending pipeline 12c rising from the downstream end of the introduction pipeline 12b, and a descending pipeline 12d extending downward from the downstream end of the ascending pipeline 12c, with the top 12e located between the ascending pipeline 12c and the descending pipeline 12d. A drain socket (not shown) is connected to the downstream end of the descending pipeline 12d of the drain trap pipeline 12, and the drain socket is connected to a drain pipe (not shown) installed on the floor surface.

[0021] The local cleaning device 4 comprises a main body 4a equipped with a cleaning nozzle (not shown), a toilet seat 4b rotatably mounted on the main body 4a, a toilet lid 4c rotatably mounted on the main body 4a so as to cover the toilet seat 4b, and an outer cover 4d covering the main body 4a. The main body 4a is attached to the rear upper part 2a of the toilet bowl body 2 via a base plate (not shown). The outer cover 4d, together with the main body 4a, covers the cleaning water tank device 6 from the outside.

[0022] The flushing water tank device 6 is configured to supply flushing water to the toilet bowl body 2 by gravity, using the flushing water stored inside the flushing water tank device 6. The flushing water tank device 6 is installed at the rear upper part 2a of the toilet bowl body 2, covered from the outside by an outer cover 4d.

[0023] As shown in Figures 2 and 3, the flushing water tank device 6 includes a flushing water tank 22 for storing flushing water, a water supply device 26 for supplying flushing water into the flushing water tank 22, a drainage device 28 for supplying the flushing water in the flushing water tank 22 to the toilet bowl body 2, a float switch 30 for detecting the full water level WL in the flushing water tank 22, a drive device 32 for driving the drainage device 28, and a controller (not shown) for controlling various devices.

[0024] The flushing water tank 22 comprises a nearly flat bottom surface 22a, a front side surface 22b, a rear side surface 22c, a left side surface 22d, and a right side surface 22e extending upward from the outer peripheral edge of the bottom surface 22a, and a drain port 22f formed at the center of the bottom surface 22a and extending downward from the bottom surface 22a. A rubber gasket 25 is provided on the outer peripheral surface of the drain port 22f of the flushing water tank 22 to watertightly seal the space between the flushing water tank 22 and the toilet bowl body 2. Furthermore, the flushing water tank 22 is formed in a flattened shape, with its length in the left-right direction being longer than its length in the up-down direction when viewed from the front, and the inside of the flushing water tank 22 is filled with flushing water up to the full water level WL when in standby mode. Furthermore, a cover member 34 (details to be described later) is provided on the bottom surface 22a of the cleaning water tank 22, covering the bottom surface 22a of the cleaning water tank 22 from below, and a sealed space S is formed between the bottom surface 22a of the cleaning water tank 22 and the cover member 34.

[0025] The water supply device 26 includes a water supply hose 26a connected to a water source such as a water supply, a water supply valve (not shown) for allowing or stopping the flow of cleaning water from the water supply hose 26a, and a water inlet 26b for discharging cleaning water into the cleaning water tank 22. Based on a detection signal of the full water level WL from the float switch 30, the opening and closing operation of the water supply valve is controlled by a command from the controller, and the supply or stopping of cleaning water from the water inlet 26b of the water supply device 26 into the cleaning water tank 22 is switched.

[0026] The drainage device 28 includes an overflow pipe 28a, a drain valve 28b provided at the lower end of the overflow pipe 28a to open and close the drain port 22f, a guide member 28c that guides the vertical movement of the drain valve 28b, and a ball chain 28d, one end of which is attached to the lower end of the overflow pipe 28a and the other end of which is attached to the tip of the drive device 32. When the drive device 32 is driven by a command from the controller and the ball chain 28d is pulled up, the overflow pipe 28a and drain valve 28b rise, and the drain port 22f is opened. Conversely, when the ball chain 28d is pulled down, the overflow pipe 28a and drain valve 28b lower, and the drain port 22f is closed.

[0027] Next, the flushing water tank device 6 and cover member 34 of the flush toilet 1 according to this embodiment will be described in detail with reference to Figures 4 to 6. Figure 4 is a perspective view of the cover member of the flush toilet according to an embodiment of the present invention, Figure 5 is a bottom view of the flushing water tank device of the flush toilet according to an embodiment of the present invention, and Figure 6 is an enlarged view of part A in Figure 2.

[0028] As shown in Figure 4, the cover member 34 comprises a bottom surface 34a which is a substantially flat surface, and a front side surface 34b, a rear side surface 34c, a left side surface 34d, and a right side surface 34e which extend upward from the outer peripheral edge of the bottom surface 34a, and is configured to cover the bottom surface 22a of the cleaning water tank 22 from below. In a plan view, the bottom surface 34a of the cover member 34 is formed to be substantially the same shape as the bottom surface 34a of the cleaning water tank 22, and is formed to be slightly larger than the bottom surface 34a of the cleaning water tank (see Figure 7).

[0029] A first through-hole 34f is formed in the center of the bottom surface 34a of the cover member 34, through which the drain port 22f of the flushing water tank 22 passes. Second through-holes 34g and 34h are formed on both the left and right sides of the first through-hole 34f, through which fixing bolts (not shown) that secure the flushing water tank 22 to the toilet bowl body 2 pass. In addition, a notch 34i is formed on the left rear side of the cover member 34 for the water supply hose 26a to pass through. In this embodiment, various openings and notches are formed in the cover member 34, but these openings and notches do not have to be formed, or other openings and notches may be formed.

[0030] As shown in Figure 5, the bottom surface 22a of the cleaning water tank 22 is provided with ribs 22g extending vertically downward for a predetermined length from the bottom surface 22a. The ribs 22g are composed of multiple ribs 22g extending in the front-rear direction and multiple ribs 22g extending in the left-right direction. Each of the multiple ribs 22g intersects at right angles in a bottom view and is arranged in a grid pattern. As a result, multiple grooves that are roughly square in shape are formed between each of the multiple ribs 22g in a bottom view (see Figure 5). The multiple ribs 22g are provided in almost the entire area inside the outer edge of the bottom surface 22a, except for the area where the drain port 22f of the cleaning water tank 22, the rubber packing 25, and the mounting parts 22h and 22i to which fixing bolts are attached are formed.

[0031] As shown in Figure 6, when the cover member 34 is attached to the bottom surface 22a of the cleaning water tank 22, a sealed space S is formed between the bottom surface 22a of the cleaning water tank 22 and the cover member 34. The sealed space S is divided into multiple spaces by multiple ribs 22g. Furthermore, the sealed space S is formed in a region inside the outer peripheral edge of the bottom surface 22a of the cleaning water tank 22. In this way, the formation of a sealed space S between the bottom surface 22a of the cleaning water tank 22 and the cover member 34 creates an air layer, and the insulating effect of this air layer prevents condensation from forming on the outer surface of the bottom surface 22a of the cleaning water tank 22. Furthermore, the sealed space in this invention is not limited to a space that is completely sealed so that no air enters or leaves; any space that is not completely sealed can still provide thermal insulation.

[0032] Furthermore, in this embodiment, a rib 22g is formed on the bottom surface 22a of the cleaning water tank 22, but a sealed space may also be formed by forming a rib on the bottom surface 34a of the cover member 34. In addition, in this embodiment, a sealed space is formed by directly contacting the rib 22g of the bottom surface 22a of the cleaning water tank 22 with the bottom surface 34a of the cover member 34, but a sealing member may be placed between the rib 22g of the bottom surface 22a of the cleaning water tank 22 and the bottom surface 34a of the cover member 34 to form a more tightly sealed space.

[0033] Next, the positional relationship between the flushing water tank device 6 and the cover member 34 of the flush toilet 1 according to this embodiment will be explained with reference to Figures 7 and 8. Figure 7 is a plan view of the flush toilet according to an embodiment of the present invention with the cover member attached to the flushing water tank device, and Figure 8 is a bottom view of the flush toilet according to an embodiment of the present invention with the cover member attached to the flushing water tank device.

[0034] As shown in Figures 7 and 8, the bottom portion 34a of the cover member 34 extends to an area outside the outer edge of the bottom portion 22a of the cleaning water tank 22 in a plan view. That is, the outer edge of the cleaning water tank 22 is located inside the outer edge of the bottom portion 34a of the cover member 34. The front side portion 34b, rear side portion 34c, left side portion 34d, and right side portion 34e of the cover member 34 are positioned at a predetermined distance from the front side portion 22b, rear side portion 22c, left side portion 22d, and right side portion 22e of the cleaning water tank 22, respectively. This allows the cover member 34 to receive condensation water generated on each side portion of the cleaning water tank 22.

[0035] Next, with reference to Figure 9, the positional relationship between the flushing water tank device 6 and cover member 34 of the flush toilet 1 according to this embodiment and the toilet body 2 will be explained. Figure 9 is a cross-sectional view taken along the line IX-IX in Figure 1. In Figure 9, the cover member 34 is indicated by a dashed line.

[0036] As shown in Figure 9, the flushing water tank 22 is located at the rear upper part 2a of the toilet bowl body 2. A portion of the bottom surface 22a of the flushing water tank 22 is positioned outside the outer peripheral edge of the rear upper part 2a of the toilet bowl body. A sealed space S is formed in almost the entire area of ​​the bottom surface 22a of the flushing water tank 22, which is positioned outside the outer peripheral edge of the rear upper part 2a of the toilet bowl body 2, by the multiple ribs 22g of the flushing water tank 22 and the cover member 34. This prevents condensation from forming on the outer surface of the bottom surface 22a of the flushing water tank 22, which is positioned outside the outer peripheral edge of the rear upper part 2a of the toilet bowl body 2, and prevents the condensation from dripping outside the toilet bowl body 2.

[0037] Next, the effects and advantages of the flush toilet 1 according to this embodiment described above will be explained. First, in the flush toilet 1 according to this embodiment, a cover member 34 is provided on the bottom surface 22a of the flush water tank 22, covering the bottom surface 22a of the flush water tank 22 from below. A sealed space S is formed between the bottom surface 22a of the flush water tank 22 and the cover member 34, creating an air layer. The insulating effect of this air layer prevents condensation from forming on the outer surface of the bottom surface 22a of the flush water tank 22. Unlike conventional toilets, which use anti-condensation materials, this design prevents condensation from forming while suppressing the increase in cost due to the overall enlargement of the tank.

[0038] In the flush toilet 1 according to this embodiment, the sealed space S is divided into multiple spaces, which further improves the heat insulation effect of the air layer.

[0039] Furthermore, in the flush toilet 1 according to this embodiment, a rib 22g is provided on the bottom surface 22a of the flush water tank 22 to form a sealed space S. Since the sealed space S is formed by this rib 22g, the strength of the flush water tank 22 can be improved while obtaining the heat insulation effect of the air layer.

[0040] In the flush toilet 1 according to this embodiment, the sealed space S is formed in an area inside the outer edge of the bottom surface 22a of the flush water tank 22, so that condensation can be reliably prevented from forming on the outer surface of the bottom surface 22a of the flush water tank 22.

[0041] Furthermore, in the flush toilet 1 according to this embodiment, the flush water tank 22 is provided in the rear upper part 2a of the toilet bowl body 2, and the sealed space S is formed in an area outside the outer peripheral edge of the rear upper part 2a of the toilet bowl body 2. Therefore, it is possible to prevent condensation from forming on the outer surface of the bottom part 22a of the flush water tank 22, which is located in an area outside the outer peripheral edge of the rear upper part 2a of the toilet bowl body 2, and to prevent the condensation from falling outside the toilet bowl body 2.

[0042] In the flush toilet 1 according to this embodiment, the cover member 34 extends to an area outside the outer peripheral edge of the bottom surface 22a of the flush water tank 22, so that condensation water generated on the side surface of the flush water tank 22 can be received by the cover member 34.

[0043] The present invention is not limited to the embodiments described above, and various modifications and variations are possible within the scope of the technical idea described in the claims. [Explanation of symbols]

[0044] 1: Flush toilet 2: Toilet bowl 2a: Upper rear 4: Local cleaning device 6: Washing water tank device 8: Bowl section 12: Drain trap pipe 20: First rim outlet 22: Washing water tank 22a: Bottom of the washing water tank 22b: Front side of the washing water tank 22c: Rear side of the washing water tank 22d: Left side of the washing water tank 22e: Right side of the washing water tank 22f: Drain outlet of the cleaning water tank 22g: Ribs of the cleaning water tank 25: Rubber gasket 34: Cover component 34a: Bottom surface of the cover member 34b: Front side portion of the cover member 34c: Rear side portion of the cover member 34d: Left side of the cover component 34e: Right side of the cover component S: Closed space

Claims

1. A flush toilet that uses flushing water to wash away waste, A washing water tank for storing washing water, A toilet bowl body comprising a bowl section for receiving waste, a spout for discharging cleaning water into the bowl section, and a drain trap pipe connected below the bowl section for discharging waste, It has, The bottom of the above-mentioned cleaning water tank is provided with a cover member that covers the bottom of the cleaning water tank from below. A flush toilet characterized in that a sealed space is formed between the bottom of the flushing water tank and the cover member.

2. The flush toilet according to claim 1, wherein the sealed space is divided into multiple spaces.

3. The bottom surface of the above-mentioned washing water tank is provided with ribs to form the above-mentioned sealed space. The flush toilet according to claim 1 or 2, wherein the above-mentioned sealed space is formed by this rib.

4. The flush toilet according to claim 1, wherein the sealed space is formed in a region inside the outer edge of the bottom surface of the flush water tank.

5. The above-mentioned flushing water tank is located at the upper rear of the toilet bowl body. The flush toilet according to claim 4, wherein the sealed space is formed in an area outside the outer peripheral edge of the rear upper part of the toilet bowl body.

6. The flush toilet according to claim 1, wherein the cover member extends to an area outside the outer peripheral edge of the bottom surface of the flush water tank.

Images