Flush toilet bowl

Abstract

To provide a flush toilet bowl capable of, while curbing an increase of production cost, realizing both toilet bowl cleaning performance at a time of normal cleaning and overflow performance at a time of overflow, and making the entire flush toilet bowl low silhouette.SOLUTION: A flush toilet bowl 1 comprises a toilet bowl body 2 and a cleaning water supply device 4 that supplies cleaning water to the toilet bowl body. The cleaning water supply device includes: a jet headrace channel 38a that guides the cleaning water below a specified water level in a water storage tank 30 to a jet discharge part; and an overflow channel 40a that overflows cleaning water exceeding the specified water level in the water storage tank to the jet discharge part. The flush toilet bowl further includes a connection unit 42 that connects the jet discharge part with both the jet headrace channel and the overflow channel, where respective outlets 38b, 40b of the jet headrace channel and the overflow channel are connected separately to the connection unit.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet that is flushed with flush water to expel waste. [Background technology]

[0002] Conventionally, a known example of a flush toilet that is flushed with flushing water to expel waste is the so-called "siphon-type flush toilet," which uses the siphon action to suck in waste within the bowl of the toilet body and expels it to the outside through the drain trap in one go, as described in Patent Document 1. The conventional flush toilet described in Patent Document 1 mentioned above is equipped with a jet water spouting section located below the bowl section, and flush water supplied to the jet water spouting section from a water source upstream of the toilet body via a jet water conduit is discharged from the jet water spouting section towards the entrance to the drain trap section as what is known as "jet water". Furthermore, in the conventional flush toilets described above, a water storage chamber is provided below the bowl section as part of a device for amplifying the flow rate of the jet water spouting. This water storage chamber is connected to the jet water spouting section, and when jet water is spouted in the jet water spouting section, the flush water in the water storage chamber is supplied to the jet water spouting section due to the negative pressure generated by the flow of the jet water, and the flow rate of the jet water spouting increases together with the flush water supplied from the jet water conduit side, allowing the siphon action in the drain trap section to occur quickly. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022 / 267527 Summary of the Invention [Problem to be solved by the invention]

[0004] Furthermore, in recent years, there has been a growing need for what is known as a "low-silhouette toilet," in which the top height position of the entire flush toilet is set relatively low in order to improve design and ease of care. However, when attempting to achieve a low silhouette for the conventional flush toilet described in Patent Document 1 mentioned above, the height position of the flush water source that supplies flush water to the toilet body (for example, a flush water supply device including a water storage tank for storing flush water) must also be set lower accordingly. On the other hand, the overflow performance of the flush water supplied from the flush water source to the toilet body during overflow is guaranteed by the potential energy of the flush water in the flush water source, so in order to improve performance, the height position of the flush water source must be set higher; however, this increases the product height of the entire flush toilet, which creates the problem of making it difficult to achieve a low silhouette. Furthermore, if the cleaning water source is set at a low position, the potential energy of the cleaning water also decreases, which necessitates a corresponding reduction in the flow resistance of the overflow flow path, necessitating measures such as increasing the flow cross-sectional area of ​​the overflow flow path. Furthermore, in the conventional flush toilet described in Patent Document 1 mentioned above, for example, if the downstream side of the overflow flow path is connected to the jet water spouting section, and the flow path cross-sectional area of ​​the overflow flow path is increased to improve overflow performance, there is a problem in that, depending on the relative positions of the outlets of the overflow flow path and the jet water spouting section, the overflow flushing water may affect the toilet flushing performance provided by the jet water spouting during normal flushing, or the jet water spouting may affect the overflow performance of the flushing water during overflow. Therefore, in order to achieve both toilet flushing performance during normal flushing and overflow performance during overflow, it may be necessary to redesign the flush toilet, which creates problems in terms of design burdens and manufacturing costs. Therefore, in recent years, a pressing issue has been how to achieve a low silhouette for the entire flush toilet, while keeping manufacturing costs down and achieving both toilet flushing performance during normal flushing and overflow performance during overflow.

[0005] Therefore, the present invention has been made to solve the problems with the conventional technology mentioned above and problems that have been required in recent years, and has the object of providing a flush toilet that can achieve both toilet flushing performance during normal flushing and overflow performance during overflow while keeping manufacturing costs down, and that can achieve a low silhouette for the entire flush toilet. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a flush toilet that is flushed with flush water to discharge waste, the flush toilet comprising: a toilet body that is equipped with a water storage tank for storing flush water and a flush water supply device that supplies the flush water; a bowl section that receives waste; a water discharge section that discharges flush water supplied from the flush water supply device; and a drain trap section that discharges waste within the bowl section, the water discharge section comprising a jet water discharge section that is provided below the bowl section and includes a jet water discharge port that is directed towards an inlet section of the drain trap section; The toilet body is equipped with a jet water conduit that guides flushing water that is below a specified water level in the water storage tank to the jet water spouting section, and an overflow flow path that causes flushing water that exceeds the specified water level in the water storage tank to overflow into the jet water spouting section, and the flush toilet further has a connection unit that connects both the jet water conduit and the overflow flow path to the jet water spouting section, and is characterized in that the jet water conduit and the overflow flow path have their respective outlets connected to the connection unit independently of each other. In the present invention configured in this manner, the outlets of the jet water conduit and the overflow flow path are connected independently to the connection unit, so that even if the cross-sectional area of ​​the outlet of the overflow flow path is increased to improve overflow performance, the effect on toilet flushing performance of the flushing water ejected from the outlet of the jet water conduit (so-called "jet water ejection") can be suppressed. Furthermore, even if the entire flush toilet is made to have a low silhouette, the downstream side (lower side) of the overflow flow path is connected to the jet water outlet section located below the bowl portion of the toilet body via a connection unit, ensuring a relatively large difference in potential energy between the upstream end (upper end) and downstream end (lower end) of the overflow flow path. As a result, there is no need to redesign the toilet body or flush water supply device to improve toilet flushing performance, which significantly reduces the design burden. Therefore, it is possible to achieve both toilet flushing performance during normal flushing and overflow performance during overflow while keeping manufacturing costs down, and it is also possible to achieve a low silhouette for the entire flush toilet.

[0007] In the present invention, preferably, the connection unit comprises a jet side connecting flow path to which the outlet of the jet water conduit is connected, and an overflow side connecting flow path to which the outlet of the overflow flow path is connected, and the jet side connecting flow path and the overflow side connecting flow path are arranged so that their respective downstream ends do not face each other in a plan view. In the present invention configured in this manner, the downstream ends of the jet side connecting flow path and the overflow side connecting flow path of the connection unit are arranged so that they do not face each other when viewed in a plane, making it difficult for cleaning water (jet water) ejected from the downstream end of the jet side connecting flow path to enter the overflow side connecting flow path.

[0008] In the present invention, the angle between the central axis of the outlet of the overflow side connecting flow passage and the central axis of the outlet of the jet side connecting flow passage is preferably set to be 80 degrees or more and 135 degrees or less in plan view. In the present invention configured in this manner, the angle that the central axis of the outlet of the overflow side connecting flow path makes with the central axis of the outlet of the jet side connecting flow path is set to be greater than or equal to 80 degrees and less than 135 degrees in plan view, so that the downstream ends of the jet side connecting flow path and the overflow side connecting flow path of the connection unit can be reliably positioned so that they do not face each other in plan view. Therefore, it is possible to make it difficult for wash water (jet water) discharged from the downstream end of the jet side connecting flow passage to enter the overflow side connecting flow passage.

[0009] In the present invention, the flow passage cross-sectional area of ​​the jet side connecting flow passage is preferably set to be smaller than the flow passage cross-sectional area of ​​the overflow side connecting flow passage. In the present invention configured in this manner, the flow path cross-sectional area of ​​the overflow side connecting flow path is larger than the flow path cross-sectional area of ​​the jet side connecting flow path, so that overflow flushing water supplied from the overflow flow path can also be reliably flowed into the toilet body from the overflow side connecting flow path of the connection unit through the jet water discharge section, ensuring overflow performance.

[0010] In the present invention, the jet side connecting flow passage is preferably formed by a nozzle member made of resin, and the overflow side connecting flow passage is preferably formed by ceramic. In the present invention configured in this manner, the jet side connection flow path of the connection unit is formed from a nozzle member made of resin, which makes it easy to process and allows for stable, precise processing while suppressing variations in size and shape. This ensures the quality of the jet side connecting flow passage, thereby increasing the degree of freedom in design. In addition, since the overflow side connecting flow passage has a larger flow passage cross-sectional area than the jet side connecting flow passage, by forming it from ceramic, it is possible to ensure strength while allowing for a certain degree of dimensional variation.

[0011] In the present invention, the connection unit is preferably entirely made of resin, including the jet side connection flow path and the overflow side connection flow path. In the present invention configured in this manner, the entire connection unit, including the jet side connection flow path and the overflow side connection flow path, is formed from resin, so that when the connection unit is attached to a space-saving area around the jet water outlet, the connection unit can be easily formed into a shape that makes it easy to store and attach. Furthermore, by forming the entire connection unit from resin, it is possible to reduce the weight and manufacturing costs compared to forming it from ceramic.

[0012] In the present invention, preferably, the connection unit further comprises a connection opening connected to the jet water outlet from the front side, and a fixing member for fixing the connection opening and the jet water outlet, and the jet water outlet comprises a ceramic wall portion which forms the jet water outlet, and in a plan view, the ceramic wall portion forms a recess which protrudes outwardly to the left and right from the jet water outlet and then bends rearward, and the fixing member is fixed to each of the connection opening and the jet water outlet which are arranged in the fore-and-aft direction by being inserted from the rear side and inner side of the recess and attached. In the present invention configured in this manner, when connecting the connection unit to the jet water spouting section, the connection opening of the connection unit and the jet water spouting section's jet water spouting outlet are positioned in the fore-and-aft direction relative to each other, and then the fixing members of the connection unit are inserted and attached to each of the connection opening and the jet water spouting outlet from the rear and inner side (inside the toilet body) of the recess in the ceramic wall section that forms the jet water spouting outlet, thereby securely fixing the connection unit to the jet water spouting section. In addition, since a fixing member is attached from the rear side and inner side (inside the toilet body) of the recess in the ceramic wall portion that forms the jet water outlet, it is possible to prevent waste from adhering to the recess in the ceramic wall portion that forms the jet water outlet or the connection opening of the connection unit. Furthermore, due to the recess in the ceramic wall that forms the jet water outlet, the jet water outlet is positioned in a recessed location compared to the downstream side of the jet water outlet, which prevents falling dirt from adhering to the jet water outlet.

[0013] In the present invention, preferably, the fixing member comprises a cylindrical portion which is inserted from the rear and inner peripheral side of the recess and attached to each of the connection opening and the jet water outlet which are arranged in the fore-and-aft direction relative to each other, and a protrusion which is provided at the rear end of the cylindrical portion and protrudes radially outward so as to be fixed to the recess in the wall portion. In the present invention configured in this manner, when connecting the connection unit to the jet water spouting section, the connection opening of the connection unit and the jet water spouting section's jet water spouting section are aligned in the front-to-rear direction with respect to each other, and then the cylindrical portion of the fixing member of the connection unit can be inserted and attached to the connection opening and the jet water spouting section from the rear side and inner periphery side (inside the toilet body) of the recess in the ceramic wall section that forms the jet water spouting section. This allows the protruding portion of the fixing member to be fixed to the recess in the ceramic wall section, and the connection unit can be reliably fixed to the jet water spouting section. In addition, since a fixing member is attached from the rear side and inner side (inside the toilet body) of the recess in the ceramic wall portion that forms the jet water outlet, it is possible to prevent waste from adhering to the recess in the ceramic wall portion that forms the jet water outlet or the connection opening of the connection unit. Furthermore, due to the recess in the ceramic wall that forms the jet water outlet, the jet water outlet is positioned in a recessed location compared to the downstream side of the jet water outlet, which can also prevent falling dirt from adhering to the jet water outlet.

[0014] In the present invention, preferably, the connection unit has a main body to which the jet side connecting flow path and the overflow side connecting flow path are connected and into which cleaning water supplied from each of the jet water conduit and the overflow flow path flows, the overflow side connecting flow path has an overflow side outlet provided on either the left or right side of the main body when viewed in a plane, the jet side connecting flow path is formed by a nozzle extending from the front side to the rear side within the main body and has a jet side outlet at its tip, and the fore-and-aft position of this jet side outlet is set within the range from the front end to the rear end of the overflow side outlet in the area within the main body. In the present invention configured in this manner, the fore-and-aft position of the jet side outlet of the connection unit is set within the range from the front end to the rear end of the overflow side outlet in the area within the main body of the connection unit, so that the cleaning water (jet water) ejected from the jet side outlet of the connection unit is less likely to flow toward the overflow side outlet of the connection unit. Here, if the position of the tip (jet side outlet) of the nozzle that forms the jet side connection flow path extending from the front side to the rear side within the main body of the connection unit is set rearward of the rear end of the overflow side outlet, there is a risk that dirt that flows into the main body of the connection unit will float around the nozzle and accumulate on the outer surface of the nozzle. In contrast, according to the present invention, the position of the tip (jet side outlet) of the nozzle that forms the jet side connection flow path extending from the front side to the rear side within the main body portion of the connection unit is limited to within the range from the front end to the rear end of the overflow side outlet within the main body portion of the connection unit, thereby reducing the risk of waste flowing into the main body portion accumulating on the outer surface of the nozzle that forms the jet side connection flow path. In addition, when overflow cleaning water flows out from the overflow side outlet, it is possible to prevent the nozzle from restricting the flow of the overflow cleaning water. Furthermore, when flushing the toilet, even if waste flows into the vicinity of the jet side outlet, the cleaning water (jet water) ejected from the jet side outlet can discharge it toward the inlet of the drain trap section while drawing in the surrounding cleaning water containing the waste. Furthermore, if the position of the tip of the nozzle (jet side outlet) forming the jet side connecting flow path is set forward of the front end of the overflow side outlet, there is a risk that the flow of cleaning water (jet water) flowing out from the jet side outlet and the flow of overflow cleaning water flowing out from the overflow side outlet will interfere with each other. In contrast, according to the present invention, the position of the tip of the nozzle (jet side outlet) forming the jet side connection flow path is limited to within the range from the front end to the rear end of the overflow side outlet within the main body of the connection unit, thereby reducing the risk of interference between the flow of cleaning water (jet water) flowing out from the jet side outlet and the flow of overflow cleaning water flowing out from the overflow side outlet.

[0015] In the present invention, preferably, the jet water discharge portion has a ceramic connected portion which forms the jet water discharge outlet and to which the connecting portion of the connection unit is connected, and the connecting portion of the connection unit is connected to the ceramic connected portion from the outside. In the present invention configured in this manner, the connection portion of the connection unit is connected from the outside to the ceramic connected portion of the jet water discharge portion, so that the connection portion of the connection unit is not exposed from inside the toilet body. This makes it possible to prevent the connection portion of the connection unit from becoming dirty due to waste inside the toilet body. In addition, the ceramic connected portion of the jet water spouting portion is positioned inside the connecting portion of the connection unit, so it is easy to clean and does not easily get dirty. Effect of the Invention

[0016] The flush toilet of the present invention makes it possible to keep manufacturing costs down while achieving both toilet flushing performance during normal flushing and overflow performance during overflow, and also achieves a low silhouette for the entire flush toilet. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is an overall configuration diagram of a flush toilet according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a diagram showing the overall configuration of a flush toilet according to a first embodiment of the present invention, and a schematic diagram of the process for supplying and draining flush water. [Diagram 3] FIG. 1 is a perspective view showing a flush water supply device for a flush toilet according to a first embodiment of the present invention. [Figure 4] FIG. 1 is a perspective view showing a flush toilet connection unit according to a first embodiment of the present invention. [Diagram 5] FIG. 5 is a side cross-sectional view of a flush toilet connection unit according to a first embodiment of the present invention (cross-sectional view taken along line VV in FIG. 4). [Figure 6] FIG. 6 is a plan cross-sectional view of a flush toilet connection unit according to a first embodiment of the present invention (a cross-sectional view taken along line VI-VI in FIG. 4). [Figure 7] FIG. 13 is a plan cross-sectional view of the jet water spouting portion and connection unit of the toilet body of a flush toilet according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A flush toilet according to a first embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing the overall configuration of a flush toilet according to a first embodiment of the present invention, and FIG. 2 is a diagram showing the individual components of the entire flush toilet according to this embodiment, as well as the process for supplying and draining flush water. First, as shown in FIG. 1, the flush toilet 1 according to the first embodiment of the present invention has its toilet body 2 placed in contact with the floor surface F, and is what is known as a "floor-mounted flush toilet." Furthermore, as shown in Figures 1 and 2, the floor-standing flush toilet 1 of this embodiment comprises a ceramic toilet body 2 that is placed in contact with the floor surface F, and a flush water supply device 4 that supplies flush water to this toilet body 2.

[0019] Next, as shown in Figures 1 and 2, the toilet body 2 specifically has a bowl portion 10 including a waste receiving surface 6 for receiving waste and a rim portion 8 formed on the upper edge of this waste receiving surface 6. The toilet body 2 also includes a drain trap portion 12 that forms a drain passage for discharging waste from within the bowl portion 10.

[0020] Furthermore, as shown in Figures 1 and 2, more specifically, the drain trap section 12 has its inlet section 12a connected to the lower part of the bowl section 10 from the upstream side to the downstream side, extends from this inlet section 12a to the rear and downward lowest end section 12b, then rises to a rear and upper top section 12c, and forms a curved pipe that descends rearward and downward from this top section 12c. As shown in FIG. 1, in a region upstream (forward) of the apex 12c of the drain trap portion 12, a water seal (water seal surface WL0) is formed. Furthermore, in the flush toilet 1 of this embodiment, the outlet portion 12d on the downstream (rear) side of the curved pipe of the drain trap portion 12 is connected to a drain pipe 16 on the back side of the wall W (or the front wall W of the cabinet C) via a drain socket 14, resulting in a so-called "wall drainage" drainage configuration.

[0021] Next, as shown in Figures 1 and 2, the toilet body 2 is provided with a rim spouting section 18 including a rim spouting outlet 18a provided in the rim portion 8, and a jet spouting section 20 including a jet spouting outlet 20a provided below and outside the bowl portion 10. Additionally, the rim water outlet 18a is directed toward the inside of the bowl portion 10, while the jet water outlet 20a is directed toward the inlet portion 12a of the drain trap portion 12 behind it. As a result, the flushing water supplied from the flushing water supply device 4 to the toilet body 2 is discharged W1 (rim spouting W1) from the rim spouting outlet 18a of the rim spouting section 18 toward the inside of the bowl section 10, and is also discharged W2 (jet spouting W2) from the jet spouting outlet 20a of the jet spouting section 20, spraying the flushing water toward the inlet section 12a of the forward drain trap section 12. That is, in this embodiment, toilet flushing is performed using rim water spout W1 and jet water spout W2 spouted from the rim water spout 18a and the jet water spout 20a, respectively, in other words, toilet flushing is performed by a so-called "rim jet flush". As a result, the flush toilet 1 according to this embodiment is a so-called "siphon-type flush toilet," which uses the siphon action to suck up waste within the bowl portion 10 and discharge it all at once to the outside through the drain trap portion 12.

[0022] Next, the flush water supply device 4 in the flush toilet 1 of the present embodiment will be explained in detail with reference to Figs. FIG. 3 is a perspective view showing a flush water supply device for a flush toilet according to the present embodiment. As shown in Figures 1 to 3, the cleaning water supply device 4 includes, from an external water source 22, such as a water main, downstream, a stopcock 24, a valve unit 26, a water supply section 28, a water storage tank 30, a pump 32, a switching valve 34, a rim side supply pipe 36, a jet side supply pipe 38, and an overflow pipe 40. First, although a detailed description of the valve unit 26 will be omitted, the valve unit 26 is equipped with a constant flow valve (not shown), a diaphragm valve (not shown) which is an opening / closing valve provided downstream of the constant flow valve (not shown), and a solenoid valve (not shown) which opens and closes this opening / closing valve (diaphragm valve), etc. For example, cleaning water W0 (supply water W0) supplied from water supply source 22 through stop valve 24 at the water supply pressure of a water supply or the like passes through a constant flow valve (not shown) of valve unit 26 to adjust the flow rate to a constant level when a diaphragm valve (not shown) is opened by the operation of an electromagnetic valve (not shown) of valve unit 26, and then passes through the diaphragm valve (not shown). As a result, flush water W0 that has passed through valve unit 26 is supplied from water supply section 28 into water storage tank 30. After the cleaning water in the water storage tank 30 is pressurized by the pump 32 to the switching valve 34, the switching valve 34 is operated so that the flow path downstream of the switching valve 34 is switched to at least one of the flow paths of the rim side supply pipe 36 which forms the rim water conduit 36a and the jet side supply pipe 38 which forms the jet water conduit 42a. As a result, the flushing water in the water tank 30 is supplied to at least one of the rim water outlet 18a and the jet water outlet 20a of the toilet body 2 via the pump 32 and the switching valve 34, so that at least one of rim water outlet W1 and jet water outlet W2 is performed in the toilet body 2.

[0023] Incidentally, the flush water supply device 4 is equipped with a controller (not shown) that controls the operation of the pump 32, and a float switch (not shown) that detects the water level in the water storage tank 30. Furthermore, the opening and closing operation of the solenoid valve (not shown) of the valve unit 26 is controlled by a controller (not shown) based on the water level in the water storage tank 30 detected by a float switch (not shown). Furthermore, the operation of the pump 32 is also controlled by a controller (not shown) based on the water level in the water storage tank 30 detected by a float switch (not shown). For example, when the water level in the water tank 30 detected by a float switch (not shown) is below a predetermined level, the solenoid valve (not shown) of the valve unit 26 opens and the diaphragm valve (not shown) of the valve unit 26 opens, thereby supplying water W0 from the water supply section 28 to the water tank 30. At the same time, the pump 32 is operated, and the flush water in the water storage tank 30 is pumped to the switching valve 34, and then the switching operation of the switching valve 34 causes the water to be supplied to the rim water conduit 36a and / or the jet water conduit 38a. When the water level in the water storage tank 30 reaches a predetermined water level (stopping water level), the solenoid valve (not shown) of the valve unit 26 closes and the diaphragm valve (not shown) closes, thereby stopping the water supply from the water supply section 28 and stopping the pump 32.

[0024] Next, as shown in Figures 1 to 3, the overflow pipe 40 of the cleaning water supply device 4 is connected at its upstream side to the water supply section 28 provided above the water storage tank 30, while its downstream side forms an overflow flow path 40a that is connected to the jet water discharge section 20 via a connection unit 42, the details of which will be described later. As a result, the flushing water W3 that has risen above the specified water level (upper limit water level or full water level) in the water storage tank 30 and reached a part of the water supply section 28 overflows into the jet water outlet section 20 by flowing through the overflow pipe 40 (overflow flow path 40a), and is then discharged into the bowl section 10 of the toilet body 2 or into the drain trap section 12.

[0025] Next, the connection unit 42 in the flush toilet 1 of the present embodiment will be explained in detail with reference to Figs. 1 to 6. 4 to 6 respectively show a perspective view, a side cross-sectional view (cross-sectional view taken along line VV in FIG. 4), and a plan cross-sectional view (cross-sectional view taken along line VI-VI in FIG. 4) of a flush toilet connection unit according to the present embodiment. First, as shown in FIGS. 1 to 6, the connection unit 42 connects the jet water spouting section 20 to both the jet side supply pipe 38 (jet water conduit 38a) and the overflow pipe 40 (overflow flow path 40a). 4 and 6, the connection unit 42 includes a jet side connection part 44 and an overflow side connection part 46. The jet side connection part 44 forms a jet side connection flow path 44a to which the outlet 38b of the jet water conduit 38a is connected. The overflow side connection part 46 forms an overflow side connection flow path 46a to which the outlet 40b of the overflow flow path 40a is connected. The jet side connection part 44 and the overflow side connection part 46 are provided independently of each other in the single connection unit 42. As a result, the respective outlets 38b, 40b of the jet side supply pipe 38 (jet water conduit 38a) and the overflow pipe 40 (overflow flow path 40a) are connected independently of each other by being connected to the jet side connection portion 44 and the overflow side connection portion 46 of the connection unit 42, respectively.

[0026] Next, as shown in FIG. 6, the jet side connecting flow passage 44a and the overflow side connecting flow passage 46a are disposed so that their respective downstream ends (jet side outlet 44b, overflow side outlet 46b) do not face each other in a plan view. In addition, in the plan view shown in Figure 6, the angle α between the central axis A1 of the outlet 46b of the overflow side connecting flow passage 46a and the central axis A2 of the outlet 44b of the jet side connecting flow passage 44a is set to be greater than or equal to 80 degrees and less than 135 degrees. Furthermore, as shown in FIG. 6, the flow passage cross-sectional area S1 of the jet side connecting flow passage 44a is set to be smaller than the flow passage cross-sectional area S2 of the overflow side connecting flow passage 46a (S1 <S2)。

[0027] Next, as shown in Figures 4 to 6, the connection unit 42 comprises, from the front side to the rear side of the jet water spouting portion 20 of the toilet body 2, a main body portion 48, a connection opening 50, a front outer sealing member 52, a rear inner sealing member 54, and a fixing member 56. First, the main body 48 of the connection unit 42 extends generally cylindrically in the front-rear direction. The jet side connection part 44 is integrally formed at the front of the main body 48, and the overflow side connection part 46 is integrally formed at one side of the main body 48 in the left-right direction (the left side when the main body 48 in FIG. 6 is viewed from the front). As a result, the jet side connection portion 44 and the overflow side connection portion 46 are each provided at two different locations on the main body portion 48, and the entire main body portion 48 is a single member integrally formed from resin. In addition, the cleaning water W2, W3 supplied from the jet water conduit 38a and the overflow flow path 40a to the jet side connecting flow path 44a and the overflow side connecting flow path 46a of the connection unit 42, respectively, are configured to flow into the main body 48 of the connection unit 42. In this embodiment, the main body 48 of the connection unit 42 is described as being formed in such a manner that the entire main body 48, including the jet side connection portion 44 which forms the jet side connection flow path 44a, and the overflow side connection portion 46 which forms the overflow side connection flow path 46a, is integrally formed from resin; however, this is not limited to this form and other modified examples are also applicable. In another variation, the jet side connection part 44 which forms the jet side connection flow path 44a in the main body 48 may be formed from a resin nozzle member, while the overflow side connection part 46 which forms the overflow side connection flow path 46a may be formed from ceramic.

[0028] Next, as shown in Figures 4 to 6, the connection opening 50 of the connection unit 42 is formed on the downstream side (rear side) within the main body 48, and is adapted to be connected from the front side to the jet water outlet 20a of the ceramic toilet body 2 via a front outer sealing member 52. In addition, the fixing member 56 is a member that fixes the connection opening 50 and the jet water outlet 20a, and is provided with a cylindrical portion 56a that extends cylindrically in the front-to-rear direction, and a protruding portion 56b that protrudes radially outward in a flange-like shape from the rear end of this cylindrical portion 56a. Furthermore, the front side of the cylindrical portion 56a of the fixing member 56 can be inserted from the rear side of the connection opening 50. Also, the inner circumferential surface of the connection opening 50 and the outer circumferential surface of the cylindrical portion 56a of the fixing member 56, which face each other, are provided with a female thread 50a and a male thread 56c, respectively, which screw together with each other. An opening 56d is formed at the rear end of the cylindrical portion 56a, and this opening 56d also functions as the actual jet water spouting port located at the most downstream side in the jet water spouting section 20.

[0029] 5 and 6, the jet water spouting section 20 has a ceramic wall section 20b that forms the jet water spouting port 20a. This ceramic wall section 20b forms a recess 20c that protrudes outwardly to the left and right from the jet water spouting port 20a and then bends backward in the plan view of FIG. As a result, the fixing member 56 is fixed to the connection opening 50 and the jet water outlet 20a, which are arranged in the front-to-rear direction, by being inserted from the rear side and inner periphery side of the recess 20c and attached thereto. More specifically, the cylindrical portion 56a of the fixing member 56 is inserted from the rear and inner side of the recess 20c of the jet water spouting section 20 and attached to each of the connection opening 50 and the jet water spouting outlet 20a, which are arranged in the fore-and-aft direction, and the protrusion 56b provided at the rear end of this cylindrical portion 56a is fixed to the recess 20c of the jet water spouting section 20 from the rear side via the rear inner seal member 54.

[0030] Next, as shown in FIG. 6, the overflow side outlet 46b of the connection unit 42 is provided on either the right or left side (the left side) of the main body portion 48 in a plan view. The jet side connection flow passage 44a of the connection unit 42 has its downstream side formed by a nozzle N extending from the front side to the rear side inside the main body 48, and has a jet side outlet 44b at its tip. The front-to-rear position P1 of the jet side outlet 44b is set within the range from the front end 46c (position P2) to the rear end 46d (position P3) of the overflow side outlet 46b in the area inside the main body 48.

[0031] Next, the operation of the flush toilet 1 according to the first embodiment of the present invention described above will be explained with reference to Figs. First, with the flush toilet 1 according to the first embodiment of the present invention, the respective outlets 38b, 40b of the jet water conduit 38a and overflow channel 40a are connected independently of each other to the connection unit 42. As a result, even if the cross-sectional area of ​​the outlet 40b of the overflow channel 40a is increased to improve overflow performance, for example, it is possible to suppress the effect on toilet flushing performance of flush water W2 discharged from the outlet 38b of the jet water conduit 38a (so-called "jet water discharge"). Furthermore, even if the entire flush toilet 1 is given a low silhouette, the downstream side (lower side) of the overflow flow path 40a is connected to the jet water spouting section 20 located below the bowl section 10 of the toilet body 2 via the connection unit 42, thereby ensuring a relatively large difference in potential energy between the upstream end (upper end) and downstream end (lower end) of the overflow flow path 40a. As a result, there is no need to redesign the toilet body 2 or the flush water supply device 4 to improve toilet flushing performance, which can significantly reduce the design burden. Therefore, it is possible to achieve both toilet flushing performance during normal flushing and overflow performance during overflow while keeping manufacturing costs down, and it is also possible to achieve a low silhouette for the entire flush toilet 1.

[0032] Furthermore, according to the flush toilet 1 of this embodiment, the downstream ends of the jet side connecting flow path 44a and the overflow side connecting flow path 46a of the connection unit 42 (jet side outlet 44b, overflow side outlet 46b) are positioned so that they do not face each other in the plan view shown in Figure 6. Furthermore, the angle α that the central axis A1 of the outlet 46b of the overflow side connecting flow path 46a of the connecting unit 42 makes with the central axis A2 of the outlet 44b of the jet side connecting flow path 44a is set to be greater than or equal to 80 degrees and less than or equal to 135 degrees when viewed in the plan view shown in Figure 6. It is more preferable that the angle α is set to 90 degrees or more, and most preferably to 135 degrees. These make it possible to make it difficult for the wash water W2 (jet spouting water W2) discharged from the downstream end (jet side outlet 44b) of the jet side connecting flow passage 44a to enter the overflow side connecting flow passage 46a.

[0033] Furthermore, with the flush toilet 1 of this embodiment, the flow path cross-sectional area S1 of the jet side connecting flow path 44a of the connection unit 42 is set to be smaller than the flow path cross-sectional area S2 of the overflow side connecting flow path 46a (S1 <S2)。 As a result, since the flow path cross-sectional area S2 of the overflow side connecting flow path 46a of the connection unit 42 is larger than the flow path cross-sectional area S1 of the jet side connecting flow path 44a (S2>S1), the overflow flushing water W3 supplied from the overflow flow path 40a can also be reliably flowed from the overflow side connecting flow path 46a of the connection unit 42 through the jet water discharge section 20 into the toilet body 2, ensuring overflow performance.

[0034] Furthermore, according to the flush toilet 1 of this embodiment, the entire connection unit 42, including the jet side connection part 44 (jet side connection flow path 44a) and overflow side connection part 46 (overflow side connection flow path 46a) of the connection unit 42, is formed from resin. As a result, even when attaching the connection unit 42 to a small space around the jet water spouting section 20, the connection unit 42 can be easily formed into a shape that makes it easy to store and attach. Furthermore, by forming the entire connection unit 42 from resin, it is possible to reduce the weight and manufacturing costs compared to forming it from ceramic.

[0035] Furthermore, as a modification of the flush toilet 1 according to this embodiment, the jet side connection part 44, which forms the jet side connection flow path 44a of the connection unit 42, may be formed from a resin nozzle member, and the overflow side connection part 46, which forms the overflow side connection flow path 46a, may be formed from ceramic. In this case, because the jet side connection flow path 44a is formed from a resin nozzle member, it is easy to process, and can be processed stably and precisely while suppressing variation in size and shape. This ensures the quality of the jet side connecting flow passage, thereby increasing the degree of freedom in design. In addition, since the overflow side connecting flow passage 46a has a larger flow passage cross-sectional area than the jet side connecting flow passage 44a, by forming it from ceramic, it is possible to ensure strength while allowing for a certain degree of dimensional variation.

[0036] Furthermore, with the flush toilet 1 of this embodiment, when connecting the connection unit 42 to the jet water spouting section 20, the connection opening 50 of the connection unit 42 and the jet water spouting outlet 20a of the jet water spouting section 20 are positioned in the fore-and-aft direction relative to each other, and then the fixing member 56 of the connection unit 42 is inserted and attached to each of the connection opening 50 and the jet water spouting outlet 20a from the rear side and inner side (inside the toilet body 2) of the recess 20c in the ceramic wall section 20b that forms the jet water spouting outlet 20a, thereby allowing the connection unit 42 to be securely fixed to the jet water spouting section 20. In addition, since the fixing member 56 is attached from the rear side and inner peripheral side (inside the toilet body 2) of the recess 20c in the ceramic wall portion 20b that forms the jet water outlet 20a, it is possible to prevent waste w from adhering to the recess 20c in the ceramic wall portion 20b that forms the jet water outlet 20a or the connection opening 50 of the connection unit 42. Furthermore, due to the recess 20c in the ceramic wall portion 20b that forms the jet water outlet 20a, the jet water outlet 20a, 56d is positioned at a recessed location compared to the downstream side of the jet water outlet 20, thereby preventing falling waste w from adhering to the jet water outlet 20a, 56d.

[0037] Furthermore, with the flush toilet 1 of this embodiment, when connecting the connection unit 42 to the jet water spouting section 20, the connection opening 50 of the connection unit 42 and the jet water spouting outlet 20a of the jet water spouting section 20 are positioned in the front-to-rear direction relative to each other, and then the cylindrical portion 56a of the fixing member 56 of the connection unit 42 can be inserted and attached to the connection opening 50 and the jet water spouting outlet 20a from the rear side and inner periphery side (inside the toilet body 2) of the recess 20c in the ceramic wall section 20b that forms the jet water spouting outlet 20a. This allows the protrusion 56b of the fixing member 56 to be fixed to the recess 20c in the ceramic wall section 20b, and the connection unit 42 can be reliably fixed to the jet water spouting section 20. In addition, since the fixing member 56 is attached from the rear side and inner peripheral side (inside the toilet body 2) of the recess 20c in the ceramic wall portion 20b that forms the jet water outlet 20a, it is possible to prevent waste w from adhering to the recess 20c in the ceramic wall portion 20b that forms the jet water outlet 20a or the connection opening 50 of the connection unit 42. Furthermore, due to the recess 20c in the ceramic wall portion 20b that forms the jet water outlet 20a, the jet water outlet 20a, 56d is positioned at a recessed location compared to the downstream side of the jet water outlet 20, which can also prevent falling waste w from adhering to the jet water outlet 20a, 56d.

[0038] Furthermore, according to the flush toilet 1 of this embodiment, the front-to-rear position P1 of the jet side outlet 44b of the connection unit 42 is set within the range from the front end 46c (position P2) to the rear end 46d (position P3) of the overflow side outlet 46b in the area within the main body 48 of the connection unit 42. This makes it difficult for the wash water W2 discharged from the jet side outlet 44b of the connection unit 42 (jet spouted water W2) to flow toward the overflow side outlet 46b of the connection unit 42. Here, if the position P1 of the tip (jet side outlet 44b) of the nozzle N which forms the jet side connection flow path 44a extending from the front side to the rear side within the main body 48 of the connection unit 42 is set rearward of the rear end 46d of the overflow side outlet 46b, there is a risk that the dirt w which flows into the main body 48 of the connection unit 42 will float around the nozzle N and accumulate on the outer surface of the nozzle N. In contrast, according to the present embodiment, the position P1 of the tip (jet side outlet 44b) of the nozzle N which forms the jet side connection flow path 44a extending from the front side to the rear side within the main body portion 48 of the connection unit 42 is limited to within the range from the front end 46c (position P2) to the rear end 46d (position P3) of the overflow side outlet 46b within the main body portion 48 of the connection unit 42, thereby reducing the risk of dirt w flowing into the main body portion 48 accumulating on the outer surface of the nozzle N which forms the jet side connection flow path 44a. Furthermore, when the overflow cleaning water W3 flows out from the overflow side outlet 46b, the nozzle N can be prevented from restricting the flow of the overflow cleaning water W3. Furthermore, even if waste w flows into the vicinity of the jet side outlet 44b during toilet flushing, the flushing water W2 (jet water W2) ejected from the jet side outlet 44b can discharge it toward the inlet portion 12a of the drain trap portion 12 while drawing in the surrounding flushing water W4 containing the waste w. Furthermore, if the position P1 of the tip (jet side outlet 44b) of the nozzle N forming the jet side connecting flow path 44a is set forward of the front end 46c of the overflow side outlet 46b, there is a risk that the flow of cleaning water W2 (jet water W2) flowing out from the jet side outlet 44b and the flow of overflow cleaning water W3 flowing out from the overflow side outlet 46b will interfere with each other. In contrast, according to this embodiment, the position P1 of the tip (jet side outlet 44b) of the nozzle N forming the jet side connection flow path 44a is limited to within the range from the front end 46c (position P2) to the rear end 46d (position P3) of the overflow side outlet 46b within the main body 48 of the connection unit 42, thereby reducing the risk of interference between the flow of cleaning water W2 (jet water W2) flowing out from the jet side outlet 44b and the flow of overflow cleaning water W3 flowing out from the overflow side outlet 46b.

[0039] Next, a flush toilet 100 according to a second embodiment of the present invention will be explained with reference to FIG. FIG. 7 is a plan cross-sectional view of the jet water spouting portion and connection unit of the toilet body of the flush toilet according to the present embodiment. Here, in a flush toilet 100 according to the second embodiment of the present invention shown in Figure 7, the same parts as those in the flush toilet 1 according to the first embodiment of the present invention described above are given the same reference numerals, and explanations of these will be omitted. As shown in Figure 7, in the flush toilet 100 of this embodiment, the jet water spouting section 120 of the ceramic toilet body 102 forms the jet water spouting outlet 120a and is equipped with a ceramic connected section 120b to which the connecting section 142a of the connection unit 142 is connected. Furthermore, the connecting portion 142a of the connection unit 142 is fixed at its outside by a hose band 152 in a state in which it is connected from the outside to the ceramic connected portion 120b.

[0040] According to the flush toilet 100 according to the second embodiment of the present invention described above, the connection part 142a of the connection unit 142 is connected from the outside to the ceramic connected part 120b of the jet water spouting part 120, so that the connection part 142a of the connection unit 142 is not exposed from inside the toilet body 102. This makes it possible for the connection portion 142a of the connection unit 142 to be less likely to become soiled by waste matter within the toilet body 102. In addition, the ceramic connected portion of the jet water spouting portion is positioned inside the connecting portion of the connection unit, so it is easy to clean and does not easily get dirty.

[0041] In the flush toilet 1,100 according to the first and second embodiments of the present invention described above, a "floor-mounted flush toilet" configuration is adopted in which the toilet body 2 is placed in contact with the floor surface F, and an example has been described in which the drainage configuration employs a so-called "wall drainage" configuration in which the outlet portion 12d of the drain trap portion 12 is connected to a drain pipe 16 on the back side of the wall W (or the front wall W of the cabinet C) via a drain socket 14. However, when a "floor-mounted flush toilet" is adopted, the drainage form is not limited to "wall drainage", and a so-called "floor drainage" drainage form may be adopted in which the outlet portion 12d of the drain trap portion 12 is connected to a drain pipe located below the floor surface F via the drain socket 14. Also, instead of adopting a "floor-mounted flush toilet" configuration, a so-called "wall-hung flush toilet" configuration may be adopted in which the rear of the toilet body 2 is fixed to the wall W of the toilet room T (or the front wall W of the cabinet C) and positioned above and spaced apart from the floor surface F, and a "rim-jet flush" cleaning method may be adopted. Furthermore, as a modified example of the flush toilet 1,100 of the embodiment described above, it is also possible to apply it to a so-called hybrid flush toilet in which flush water supplied under direct pressure from the water supply is supplied directly to the rim spout 18a of the toilet body 2, and flush water that is temporarily supplied and stored in the water storage tank 30 is supplied to the jet spout 20a of the toilet body 2 by the pump 32. [Explanation of symbols]

[0042] 1. Flush toilet according to the first embodiment of the present invention 2 Toilet bowl body 4. Cleaning water supply device 6 Waste receiving surface 8 Rim 10 Bowl section 12 Drain trap section 12a Inlet of bent pipe of drain trap 12b The lowest end of the bent pipe of the drain trap section 12c Top of the bent pipe at the drain trap 12d Outlet of drain trap 14 Drain socket 16 Drain pipe 18 Rim outlet 18a Rim Spout 20 Jet water outlet 20a Jet outlet 20b Ceramic wall 20c Recess 22 Water supply source 24 Stopcock 26 Valve unit 28 Water supply section 30 Water Tank 32 Pump 34 Switching valve 36 Rim side supply pipe 36a Rim Waterway 38 Jet side supply pipe 38a Jet Waterway 38b Outlet of jet waterway, inlet of jet side connecting channel 40 Overflow pipe 40a Overflow channel 40b Outlet of overflow passage, inlet of overflow side connecting passage 42 Connection Unit 44 Jet side connection 44a Jet side connection passage 44b Jet side outlet (downstream end of jet side connection flow passage) 46 Overflow side connection 46a Overflow side connection channel 46b Overflow side outlet (downstream end of overflow side connecting flow passage, overflow side outlet) 46c Front end of overflow outlet 46d Rear end of overflow outlet 48 Connection unit body 48a Rear end of main body 50 Connection opening of connection unit 50a Female thread of the connection opening of the connection unit 52 Front outer seal member 54 Rear inner seal member 56 Fixing member 56a Cylindrical part 56b Protrusion 56c Male thread 56d opening, practical jet outlet 100 Flush toilet according to the second embodiment of the present invention 102 Toilet body 120 Jet water outlet 120a Jet Spout 120b Ceramic connection parts 142 Connection Unit 142a Connection 150 Hose Clamp A1 Central axis of the outlet of the overflow side connection passage A2 Central axis of the outlet of the jet side connection passage C Cabinet F Floor N Nozzle P1 Front-rear position of the outlet of the jet side connection passage of the connection unit P2 Front end position of the outlet of the overflow side connection channel of the connection unit P3 Rear end position of the outlet of the overflow side connection channel of the connection unit T Toilet room S1 Cross-sectional area of ​​the connection passage on the jet side of the connection unit S2 Cross-sectional area of ​​the overflow side connection flow passage of the connection unit W Toilet room wall or cabinet front wall W0 Water supply W1 Rim water discharge, rim cleaning water W2 Jet water, jet cleaning water W3 Overflow cleaning water W4 Surrounding cleaning water WL0 Water sealing surface w Filth α is the angle between the central axis of the outlet of the overflow side connecting passage and the central axis of the outlet of the jet side connecting passage in a plan view

Claims

1. A flush toilet that is flushed with flush water to expel waste, a cleaning water supply device that is provided with a water storage tank for storing cleaning water and supplies cleaning water; a toilet body including a bowl portion for receiving waste, a water discharge portion for discharging flush water supplied from the flush water supply device, and a drain trap portion for discharging waste within the bowl portion; The water spouting section is provided below the bowl section and includes a jet water spouting port directed toward the inlet of the drain trap section, The flush water supply device or the toilet body is provided with a jet water conduit that guides flush water below a specified water level in the water storage tank to the jet water spouting section, and an overflow flow path that causes flush water above the specified water level in the water storage tank to overflow to the jet water spouting section, The flush toilet further has a connection unit that connects both the jet water conduit and the overflow flow path to the jet water spouting section, A flush toilet, wherein the jet water conduit and the overflow flow path have respective outlets connected to the connection unit independently of each other.

2. 2. The flush toilet according to claim 1, wherein the connection unit comprises a jet-side connecting flow path to which an outlet of the jet water conduit is connected, and an overflow-side connecting flow path to which an outlet of the overflow flow path is connected, and the jet-side connecting flow path and the overflow-side connecting flow path are arranged so that their respective downstream ends do not face each other in a plan view.

3. 3. The flush toilet according to claim 2, wherein the angle between the central axis of the outlet of the overflow side connecting flow passage and the central axis of the outlet of the jet side connecting flow passage is set to be between 80 degrees and 135 degrees inclusive in a plan view.

4. 3. The flush toilet according to claim 2, wherein the flow path cross-sectional area of ​​the jet side connecting flow path is set to be smaller than the flow path cross-sectional area of ​​the overflow side connecting flow path.

5. 5. The flush toilet according to claim 4, wherein the jet side connecting flow passage is formed by a nozzle member made of resin, and the overflow side connecting flow passage is formed from ceramic.

6. 5. The flush toilet according to claim 4, wherein the connection unit, including the jet side connecting flow passage and the overflow side connecting flow passage, is entirely made of resin.

7. the connection unit further includes a connection opening portion connected to the jet water outlet from the front side, and a fixing member fixing the connection opening portion and the jet water outlet, The jet water spouting section includes a ceramic wall portion that forms the jet water spouting port, and the ceramic wall portion forms a recess that, in a plan view, protrudes outward from the jet water spouting port in the left and right directions and then bends rearward, 2. The flush toilet according to claim 1, wherein the fixing member is fixed to each of the connection opening and the jet water spouting outlet, which are arranged in the front-to-rear direction relative to each other, by being inserted from the rear side and inner periphery side of the recess.

8. The flush toilet according to claim 7, wherein the fixing member comprises a cylindrical portion that is inserted from the rear side and inner peripheral side of the recess and attached to each of the connection opening and the jet water outlet, which are arranged in the fore-and-aft direction relative to each other, and a protrusion that is provided at the rear end of the cylindrical portion and protrudes radially outward so as to be fixed to the recess in the wall portion.

9. the connection unit includes a main body portion to which the jet side connection flow path and the overflow side connection flow path are connected, and into which wash water supplied from each of the jet water conduit and the overflow flow path flows; the overflow-side connection flow path includes an overflow-side outlet provided on either the left or right side of the main body in a plan view, 3. The flush toilet according to claim 2, wherein the jet side connecting flow path is formed by a nozzle extending from the front side to the rear side within the main body and is equipped with a jet side outlet at its tip, and the front-to-rear position of this jet side outlet is set within the range from the front end to the rear end of the overflow side outlet in the area within the main body.

10. 2. The flush toilet of claim 1, wherein the jet water-spouting portion comprises a ceramic connected portion which forms the jet water outlet and to which the connecting portion of the connection unit is connected, and the connecting portion of the connection unit is connected to the ceramic connected portion from the outside.

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