Water closet

Abstract

To provide a water closet that can easily and reliably assemble a washing water supply pipe to a ceramic toilet bowl body and can improve workability.SOLUTION: The water closet 1 of the present invention comprises: the ceramic toilet bowl body; the washing water supply pipe 8 that is connected between washing water sources 10, 30 and a toilet bowl body and supplies washing water supplied from a washing water source to a rim conduit 2d of the toilet bowl body; and a pipe connection fixing device 40 provided at the outlet part 8a of the washing water supply pipe and fixed in a state where the outlet part is connected to an inlet part of the rim conduit of the toilet bowl body, wherein the pipe connection fixing device has a nozzle part 42, an inner holding member 46, and an outer holding member 44, holding parts 56, 58, 60, 62 that holds the inner holding member so that it can slide and swing with respect to the nozzle part when the pipe connection fixing device is attached to the inlet part of the rim conduit of the toilet bowl body are provided for each of the nozzle part and the inner holding member, respectively.SELECTED DRAWING: Figure 5

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, flush toilets that are cleaned with flush water to expel waste include those in which a flush water supply pipe is connected between the flush water source and the toilet body, supplying flush water from the flush water source to a rim water channel in the toilet body, as known from Patent Documents 1 and 2, for example. First, in the conventional flush toilet described in Patent Document 1, the flush water supply pipe that connects the flush water source (storage tank) and the toilet body is made up of an expandable and contractible bellows-shaped hose member. This makes it possible to easily assemble the storage tank and toilet body by expanding and contracting the flush water supply pipe when assembling the storage tank to the toilet body. Next, in the conventional flush toilet described in Patent Document 2, the downstream side of the flush water supply pipe is connected to the inlet of the headrace channel in the toilet body (an opening in the rear side wall of the headrace channel). Specifically, this flush water supply pipe comprises a water supply pipe and an outer cylindrical pipe that extends coaxially around the outside of this water supply pipe. The water supply pipe also has an inner cylindrical portion at its tip that can be inserted into an opening in the rear side wall of the water passage of the toilet body, and a locking portion that is located further towards the tip of the inner cylindrical portion and extends wider than the opening. Furthermore, a flange is provided on the tip side of the outer cylinder, and this flange is formed so as to extend wider than the opening on the outside of the opening in the rear side wall of the water passage of the toilet body. This allows the flange of the outer tube and the locking portion within the opening in the rear side wall of the water conduit of the toilet body to clamp the rear side wall of the water conduit via a gasket, and the flush water supply pipe is fixed to the opening of the water conduit of the toilet body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-218789 [Patent Document 2] Patent No. 5110865 (JP 2008-144454 A) Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional flush toilets described above, in which a flush water supply pipe is connected between the flush water source and the toilet body, a problem that has been required in recent years is how to reduce the pressure loss of the flush water that passes through the flush water supply pipe, and the pressure loss of the flush water that passes through the inlet (opening) of the water conduit in the toilet body to which the outlet of the flush water supply pipe is connected. Furthermore, particularly when assembling the outlet of the flush water supply pipe to the inlet (opening) of the water conduit in the toilet body, it is difficult for the installer to access the inside of the inlet (opening) of the water conduit, and the installer on the front side of the toilet body cannot visually check the condition of the connection between the outlet of the flush water supply pipe on the wall surface (rear wall surface) inside the water conduit on the back side and the inlet (opening) of the water conduit in the toilet body, which can be a factor in poor connection. Furthermore, in ceramic toilet bodies, the wall surface that forms the inlet (opening) of the water conduit in the toilet body to which the outlet of the flush water supply pipe is connected is prone to unevenness due to variations caused by manufacturing errors that are unique to ceramic, which can cause problems with the outlet of the flush water supply pipe and the inlet (opening) of the water conduit in the toilet body being poorly fixed together. Therefore, when assembling a flush water supply pipe to the inlet (opening) of the water conduit in the toilet body, a problem that has been required in recent years is how to simply and reliably connect and secure the outlet of the flush water supply pipe to the inlet (opening) of the water conduit in the toilet body.

[0005] Therefore, the present invention was made to solve the problems of the prior art mentioned above and the issues that have been required in recent years, and its object is to provide a flush toilet that allows the flush water supply pipe to be easily and reliably assembled into the ceramic toilet body, improving workability. [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, comprising: a flush water source that supplies flush water; a ceramic toilet body that is equipped with a bowl portion that receives waste, a rim portion formed on the upper edge of the bowl portion, and a rim conduit that is provided on the rim portion and directs flush water to the bowl portion; a flush water supply pipe that is connected between the flush water source and the toilet body and supplies flush water supplied from the flush water source to the rim conduit of the toilet body; and a pipe connection fixing device that is provided on the outlet portion of this flush water supply pipe and fixes this outlet portion in a connected state to the inlet portion of the rim conduit of the toilet body, and the pipe connection fixing device is provided on the outlet portion of the flush water supply pipe and connects the opening of the inlet portion of the rim conduit the nozzle section is insertable into the rim conduit from the inlet section of the rim conduit; an inner holding member that is attached to the nozzle section so as to be slidable and swingable relative to the nozzle section and is capable of holding the nozzle section from the inside of the rim conduit when inserted together with the nozzle section into the rim conduit from the inlet section of the rim conduit; and an outer holding member that is capable of holding the nozzle section from the outside of the toilet body when the nozzle section is inserted into the rim conduit from the inlet section of the rim conduit, wherein the nozzle section and the inner holding member are each provided with holding parts that hold the inner holding member so that it can slide and swing relative to the nozzle section when the pipe connection fixing device is attached to the inlet section of the rim conduit of the toilet body. In the present invention configured in this manner, when the flush water supply pipe that connects the flush water source to the ceramic toilet body is assembled to the toilet body during installation of the flush toilet, the outlet of the flush water supply pipe is fixed in a connected state to the inlet of the rim water channel of the toilet body by the pipe connection and fixing device. Specifically, first, the nozzle portion of the pipe connection and fixing device provided at the outlet of the flush water supply pipe and the holding portions of the inner holding member are used to attach the inner holding member so that the inner holding member can slide and swing relative to the nozzle portion. Next, the holding portion of the inner holding member is slid relatively to the holding portion of the nozzle portion so that the inner holding member, together with the nozzle portion, is in a position that allows it to be inserted into the rim water channel through the opening at the inlet portion of the rim water channel of the toilet body. The inner retaining member is then tilted and swung until a portion of it abuts against the nozzle portion, temporarily fixing the inner retaining member of the pipe connection fixing device to the nozzle portion, and both the nozzle portion and the inner retaining member become insertable through the opening of the inlet of the rim water conduit. Next, when the entire inner retaining member of the pipe connection fixing device, together with the nozzle portion, passes through the inlet portion of the rim conduit and is inserted into the rim conduit, the inner retaining member is released from its temporary fixed state relative to the nozzle portion and swings again, until almost the entire inner retaining member comes into contact with the inner wall surface that forms the opening of the inlet portion within the rim conduit. As a result, even if the installer on the front side of the toilet body cannot visually see the inner retaining member inserted into the rim conduit from the opening at the inlet of the rim conduit from inside the rim conduit 2d, the nozzle portion can be easily held from inside the rim conduit by the inner retaining member 46. The nozzle portion is held from the outside of the toilet body by the outer holding member of the pipe connection fixing device, so that the inner holding member is securely fixed (locked) to the inner wall surface of the rim conduit when inserted into the rim conduit through the opening at the inlet of the rim conduit, and the nozzle portion is securely fixed (locked) to the inner wall surface of the rim conduit via the inner holding member. As a result, the outlet of the flush water supply pipe can be easily and securely fixed in a connected state even to the inlet of the rim water conduit of a ceramic toilet body which has manufacturing errors, or to the inner wall surface of the rim water conduit which forms its opening (a ceramic wall surface which has unevenness due to manufacturing errors). Therefore, the pipe connection and fixing device allows the flush water supply pipe to be easily and reliably attached to the ceramic toilet body, improving the ease of installation of the flush toilet.

[0007] In the present invention, preferably, the inner retaining member has an annular portion formed in a ring shape whose maximum outer dimension is larger than the maximum dimension of the opening cross section of the inlet portion of the rim water conduit, and this annular portion has a swing axis extending in a direction perpendicular to the axial direction of the nozzle portion and is swingable relative to the nozzle portion around this swing axis. In the present invention configured as described above, when inserting the nozzle portion into the opening of the inlet of the rim water conduit, the inner holding member can be tilted by swinging it about the swing axis until the annular portion of the inner holding member abuts against the nozzle portion. This allows the inner holding member to be temporarily fixed to the nozzle portion in a position (tilted position) that allows insertion together with the nozzle portion. Therefore, even if the maximum outer dimension of the annular portion of the inner retaining member is set larger than the maximum dimension of the opening cross section of the inlet portion of the rim water conduit, both the nozzle portion and the inner retaining member can be easily inserted through the opening of the inlet portion of the rim water conduit. Furthermore, when the entire inner retaining member, together with the nozzle portion, has passed through the entrance of the rim water conduit and is inserted into the rim water conduit, the annular portion of the inner retaining member is released from its temporary fixed state relative to the nozzle portion and can again swing around the swing axis. In this case, because the maximum dimension of the outer shape of the annular portion of the inner retaining member is larger than the maximum dimension of the cross-section of the opening of the inlet of the rim water conduit, almost the entire annular portion of the inner retaining member can come into contact with the inner wall surface (ceramic surface) that forms the opening of the inlet within the rim water conduit, in a state that is less susceptible to unevenness due to manufacturing errors in the ceramic. This allows both the nozzle portion and the inner holding member to be securely fixed (locked) to the inner wall surface (ceramic surface) of the rim water conduit, making them less likely to come loose. As a result, when assembling the flush water supply pipe to the ceramic toilet body, it is possible to provide a pipe connection fixing device that makes it easy to insert both the nozzle portion and the inner retaining member into the opening of the inlet portion of the rim water conduit, and makes them difficult to come off after insertion.

[0008] In the present invention, preferably, the holding portion of the inner holding member comprises a pair of holding protrusions arranged opposite each other on the inner peripheral side of the annular portion so as to include the swing axis, and the holding portion of the nozzle portion comprises a first holding groove portion formed along the circumferential direction of the outer peripheral surface of the nozzle portion and holding each of the pair of holding protrusions in a slidable and rotatable manner, and a second holding groove portion formed from one end of the first holding groove portion in the axial direction of the nozzle portion and holding each of the pair of holding protrusions in a slidable and rotatable manner. In the present invention configured in this manner, when assembling the flush water supply pipe to the toilet body, each of the pair of retaining protrusions of the inner retaining member can be easily attached in advance to either the first retaining groove or the second retaining groove of the nozzle portion, thereby improving the ease of assembly. Each of the pair of holding protrusions of the inner holding member is held slidably and rotatably along the first holding groove or the second holding groove of the nozzle portion. This allows, for example, each of the pair of holding protrusions of the inner holding member to slide circumferentially along the first holding groove of the nozzle portion and to slide axially along the second holding groove of the nozzle portion, making it easy to adjust the position of the inner holding member relative to the nozzle portion. Furthermore, each of the pair of holding protrusions of the inner holding member can be rotated in the first holding groove or the second holding groove of the nozzle portion, allowing the annular portion of the inner holding member to swing relative to the nozzle portion, thereby making it possible to easily adjust the attitude (tilt attitude and tilt angle) of the annular portion of the inner holding member relative to the nozzle portion.

[0009] In the present invention, preferably, the holding groove portion of the nozzle portion further includes a third holding groove portion that is curvedly cut out along the circumferential direction of the outer peripheral surface of the nozzle portion, and this third holding groove portion is capable of holding a part of the annular portion of the inner holding member other than the holding protrusion portion in the swung state. In the present invention configured in this manner, when the inner retaining member together with the nozzle portion is inserted into the rim conduit through the opening at the inlet of the rim conduit, a part of the annular portion of the inner retaining member other than the retaining protrusion swings up to the third retaining groove portion of the nozzle portion and is held in an inclined state. As a result, when the nozzle portion and inner retaining member are inserted into the inlet opening of the rim water conduit, the maximum dimension of the cross section perpendicular to the axial direction of these inserted portions can be made smaller than the size of the inlet opening of the rim water conduit. Therefore, even if the maximum outer dimension of the annular portion of the inner retaining member is set larger than the size of the inlet opening of the rim water conduit, both the nozzle portion and the inner retaining member can be smoothly inserted through the inlet opening of the rim water conduit, thereby improving workability.

[0010] In the present invention, preferably, the annular portion of the inner retaining member has an opening cross-section whose interior is formed in a generally elongated hole shape, a first central axis extending in the longitudinal direction of the opening cross-section, and a second central axis bisecting the first central axis and extending in the width direction perpendicular to the longitudinal direction of the annular portion, and the swing axis is set to be eccentric with respect to the second central axis of the annular portion. In the present invention configured in this manner, the generally long-hole-shaped opening cross section of the annular portion of the inner retaining member has a first central axis in its longitudinal direction and a second central axis that bisects the first central axis and extends in the width direction perpendicular to the longitudinal direction of the annular portion, and the swing axis of the annular portion of the inner retaining member is eccentric with respect to the second central axis. This makes it easier to swing the entire inner retaining member around the swing axis when inserting the inner retaining member and the nozzle portion into the opening of the inlet portion of the rim water conduit until part of the annular portion of the inner retaining member comes into contact with the nozzle portion. Therefore, even if the maximum outer dimension of the annular portion of the inner retaining member is set larger than the maximum dimension of the opening cross section of the inlet portion of the rim water conduit, the inner retaining member and nozzle portion can be brought into a state where they can be smoothly inserted before being inserted into the opening of the inlet portion of the rim water conduit. Furthermore, even when the entire inner retaining member, together with the nozzle portion, has passed through the entrance portion of the rim water conduit and been inserted into the rim water conduit, the annular portion of the inner retaining member is released from its temporary fixed state relative to the nozzle portion, making it easier to swing the entire inner retaining member again around the swing axis. This allows both the nozzle portion and the inner holding member to be smoothly fixed (engaged) to the inner wall surface (ceramic surface) of the rim water conduit, making them less likely to come loose.

[0011] In the present invention, the toilet body is preferably configured so that all of the flush water supplied from the flush water source to the flush water supply pipe is supplied from the inlet of the rim water conduit through the rim water conduit into the bowl portion. In the present invention configured in this way, the ceramic toilet body is configured so that all of the flush water supplied from the flush water source to the flush water supply pipe is supplied from the inlet of the rim water conduit through the rim water conduit into the bowl portion, so the size of the opening at the inlet of the rim water conduit can be set relatively large. This allows the size of the flow path cross section of the nozzle member's water passage and water outlet connected to the opening at the inlet of the rim water conduit to be set large, thereby reducing the pressure loss of the cleaning water passing through the nozzle member's water passage and water outlet. Furthermore, the pipe connection and fixing device can have a simple structure that allows the outlet portion of the flush water supply pipe to be easily connected and fixed to the opening of the inlet portion of the rim water conduit. As a result, the flush water supply pipe can be easily and reliably assembled into the rim water channel of the ceramic toilet body, improving workability. [Effects of the Invention]

[0012] According to the flush toilet of the present invention, the flush water supply pipe can be easily and reliably assembled to the ceramic toilet body, improving workability. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic perspective view of a flush toilet according to an embodiment of the present invention, seen obliquely from behind and above. [Figure 2] 1 is a diagram showing the overall configuration of a flush toilet according to an embodiment of the present invention. [Figure 3] FIG. 2 is a partially enlarged plan view showing the tank unit portion of the flush toilet according to one embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 1 is an exploded perspective view of a flush toilet pipe connection fixing device according to an embodiment of the present invention. [Figure 6] FIG. 2 is an exploded enlarged perspective view showing the nozzle member and inner holding member of the flush toilet pipe connection fixing device according to one embodiment of the present invention. [Figure 7A] FIG. 1 is a right side view of the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, as viewed from the right side of the rear side of the toilet body, showing the state before the inner retaining member is swung relative to the nozzle member (state before it is tilted). [Figure 7B] This is a right side view of the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, viewed from the right side of the rear side of the toilet body, showing the inner retaining member swung (tilted) relative to the nozzle member. [Figure 8A] 1 shows the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, in a state before the retaining protrusion of the inner retaining member is assembled into the retaining groove (circumferential groove) of the nozzle member. [Figure 8B]This shows the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, with the retaining protrusion of the inner retaining member being assembled into the retaining groove (circumferential groove) of the nozzle member and then sliding along this circumferential groove. [Figure 8C] This shows the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, with the retaining protrusion of the inner retaining member sliding along the circumferential groove of the nozzle member to a corner of that groove, and then sliding along the axial groove. [Figure 8D] This shows the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, with the retaining protrusion of the inner retaining member sliding along the axial groove of the nozzle member to the tip of the groove, and then a portion of the annular portion of the inner retaining member fitting into the swing-restricting groove of the nozzle member. [Figure 8E] FIG. 1 is a perspective view of the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, as seen from the front side of the toilet body (the rear side of the toilet body) and inserted into the opening at the inlet of the rim water channel of the toilet body. [Figure 8F] FIG. 10 is a perspective view of the flush toilet pipe connection fixing device according to one embodiment of the present invention, viewed from the inside of the water channel of the toilet body, showing the completed assembly of the nozzle member and inner holding member. DETAILED DESCRIPTION OF THE INVENTION

[0014] A flush toilet according to one embodiment of the present invention will now be described with reference to the accompanying drawings. First, Figure 1 is a schematic perspective view of a flush toilet according to one embodiment of the present invention, seen obliquely from behind and above, and Figure 2 is a diagram of the overall configuration of a flush toilet according to one embodiment of the present invention. As shown in Figures 1 and 2, a flush toilet 1 according to one embodiment of the present invention comprises a ceramic toilet body 2 and a tank device 4 (flush water source) provided behind it. The toilet body 2 also has a bowl portion 2a that receives waste, a drain trap portion (drain trap pipe 2b) that extends from the bottom of the bowl portion 2a and discharges waste from within the bowl portion 2a, and a rim portion 2c that is formed on the upper edge of the bowl portion 2a.

[0015] Next, as shown in FIGS. 1 and 2, the tank device 4 is provided with a water supply pipe 6 and a water discharge pipe 8 connected to the upstream side and downstream side thereof, respectively. The upstream side of the water supply pipe 6 is connected to an external water supply source (not shown) such as a water line, while the downstream side of the water supply pipe 6 is connected to the water storage tank 10 of the tank device 4. As a result, flush water is supplied from the water supply pipe 6 to the water storage tank 10. In addition, a stop valve 12 and a valve unit 14 are provided on the water supply pipe 6 from the upstream side to the downstream side. Furthermore, the valve unit 14 includes a constant flow valve 16 provided in the water supply pipe 6, and an electromagnetic valve 18 that opens and closes an on-off valve (diaphragm valve 17) provided downstream of the constant flow valve 16.

[0016] Next, as shown in Figures 1 and 2, the tank device 4 further includes a connecting unit 20 connected to the downstream side of the valve unit 14 of the water supply pipe 6, and a tank unit 22 connected downstream of this connecting unit 20 and including the water storage tank 10. In the valve unit 14, the flow rate of the cleaning water in the water supply pipe 6 is adjusted to a constant value by a constant flow valve 16. Thereafter, the solenoid valve 18 opens electromagnetically, and the flow path of the water supply pipe 6 is opened by the on-off valve (diaphragm valve 17), so that the flushing water in the water supply pipe 6 is supplied to the tank unit 22 via the connecting unit 20.

[0017] As shown in FIG. 2, the connection unit 20 includes a housing 24, an overflow pipe 26, and a check valve . The housing 24 has a lower opening 24 a that is detachably connected to an upper opening 10 a of the water storage tank 10 of the tank unit 22 .

[0018] Next, the overflow pipe 26 connects the discharge pipe 8 to an overflow port 24b provided in a part of the side wall of the housing 24. The discharge pipe 8 is a connecting pipe (flushing water supply pipe) connected at its upstream side to the pump 30 of the tank device 4, and at its downstream side to the rim water channel 2d inside the rim portion 2c of the toilet body 2. Furthermore, a check valve 28 is provided in the overflow port 24b, which allows the cleaning water in the housing 24 to flow from the overflow port 24b into the overflow pipe 26, while preventing the cleaning water in the overflow pipe 26 from flowing back into the housing 24.

[0019] Next, as shown in FIG. 2, the tank unit 22 includes the water storage tank 10, a pump 30, a float switch 32, and a drain plug . The pump 30 is provided in a part (midway) of a water pipe 36 connected to the upstream side of the discharge pipe 8. An upstream end 36a of this water pipe 36 is connected to a downstream end 38a of a suction pipe 38 provided in the water storage tank 10.

[0020] When the pump 30 is activated, the flush water stored in the water storage tank 10 is sucked into the water supply pipe 36 through the suction pipe 38, and then pressure-fed to the discharge pipe 8 via the pump 30. As a result, all of the flush water supplied from the water storage tank 10 to the discharge pipe 8 by the pump 30 is supplied into the rim conduit 2d from the inlet 2e of the rim conduit 2d. The flush water in the rim water conduit 2d is then discharged into the bowl portion 2a from the rim water outlet 2f at the downstream end of the rim water conduit 2d, thereby performing a toilet flush (so-called toilet flush using 100% rim water discharge). That is, each of the water supply pipe 36 and the discharge pipe 8 functions as a flush water supply pipe that supplies flush water pressure-fed from the water storage tank 10 by the pump 30 to the toilet body 2.

[0021] The float switch 32 detects the water level in the water storage tank 10, and the opening and closing operation of the solenoid valve 18 of the valve unit 14 is controlled by the controller C based on the water level in the water storage tank 10 detected by the float switch 32. The operation of the pump 30 is also controlled by the controller C based on the water level in the water storage tank 10 detected by the float switch 32. For example, when the water level in the water storage tank 10 detected by the float switch 32 is below a predetermined level, the solenoid valve 18 opens, the water supply pipe 6 is opened, and the pump 30 is activated. When the water level in the water storage tank 10 reaches a predetermined level, the solenoid valve 18 closes, the water supply pipe 6 is closed, and the pump 30 is stopped.

[0022] A drain plug 34 is provided on the bottom surface of the water storage tank 10. This drain plug 34 is always closed during normal use, but is opened as necessary to allow flush water in the water storage tank 10 to be drained to the outside.

[0023] Next, Figure 3 is a partially enlarged plan view showing the tank unit of a flush toilet according to one embodiment of the present invention, and Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3. First, as shown in Figures 1 to 4, the discharge pipe 8 is made of a hose member such as a flexible hose, and a pipe connection fixing device 40, the details of which will be described later, is provided at the outlet portion 8a (outlet portion of the flush water supply pipe), which is the downstream end of the discharge pipe 8. When assembling the tank device 4 to the ceramic toilet body 2 during installation of the flush toilet 1, this pipe connection fixing device 40 fixes the outlet 8a of the discharge pipe 8 (the outlet of the flush water supply pipe) in a connected state to the inlet 2e (the inlet of the rim water conduit) of the rim water conduit 2d located on the rear side of the rim part 2c of the toilet body 2.

[0024] Next, the pipe connection fixing device 40 will be described in detail with reference to FIGS. 4 to 7B. FIG. 5 is an exploded perspective view of a flush toilet pipe connection fixing device according to one embodiment of the present invention. As shown in FIGS. 4 and 5, the pipe connection fixing device 40 includes a nozzle member 42, an outer holding member 44, and an inner holding member 46, respectively. First, as shown in Figures 4 and 5, the nozzle member 42 is a generally cylindrical member, and its upstream end is connected to the outlet 8a of the water discharge pipe 8 so as to communicate with the inside of the water discharge pipe 8. In other words, inside the nozzle member 42, a single water passage 42a is formed in a generally cylindrical shape, through which flush water flowing out from the outlet 8a of the water discharge pipe 8 passes. Furthermore, the downstream end of the water passage 42a of the nozzle member 42 functions as a water discharge port 42b that discharges flush water supplied from the water discharge pipe 8 to the water passage 42a into the rim water passage 2d. Furthermore, as shown in FIG. 4, the diameter of the circular opening cross section of the water outlet 42b of the nozzle member 42 (water outlet diameter D1) is set to a dimension that allows the nozzle member 42 to be inserted into the opening of the inlet 2e of the rim water conduit 2d.

[0025] Next, as shown in Figures 4 and 5, the outer holding member 44 consists of multiple members 48, 50, 52, and 54 that are concentrically arranged on the outside of the nozzle member 42, and is able to hold the nozzle member 42 from the outside of the toilet body 2. Specifically, the outer retaining member 44 is provided with a nut member 48, a pressing member 50, a gasket 52, and an O-ring 54, arranged from the outside to the inside in the axial direction, or from the outer circumferential side to the inner circumferential side. The nut member 48 has a portion of its inner circumferential surface threadedly engaged with the outer circumferential surface of the nozzle member 42, so that the nozzle member 42 can be held from the outside of the toilet body 2. The retaining member 50 is a generally annular member with a flange portion 50a on its outer circumferential surface. A portion of the retaining member 50, including its axial end portion, is inserted into the nut member 48, and the retaining member 50 is capable of holding the axial middle portion of the nozzle member 42 from the outer circumferential side. The packing 52 is attached to the inside of a flange portion 50a (see Figure 4) that protrudes outward from the outer peripheral surface of the pressing member 50. The pressing member 50 and packing 52 are attached watertight to the wall surface (rear wall surface 2g of the rim portion 2c) that forms the opening of the inlet 2e of the rim water channel 2d in the toilet body 2. The O-ring 54 is attached to the outer peripheral surface of the axially middle portion of the nozzle member 42. The outer peripheral side of this O-ring 54 is held watertight by the inner peripheral surface of the pressing member 50.

[0026] Next, as shown in FIGS. 4 and 5, the inner holding member 46 is a generally annular member attached to the nozzle member 42 so as to be able to slide and swing relative to the nozzle member 42. Hereinafter, with reference to Figures 4 to 7B, the specific structure of the inner holding member 46 and the details of the mounting structure between the inner holding member 46 and the nozzle member 42, which allows the inner holding member 46 to slide and swing relative to the nozzle member 42, will be described. First, Figure 6 is an exploded enlarged perspective view showing an enlarged view of the nozzle member and inner holding member portion of a flush toilet pipe connection fixing device according to one embodiment of the present invention. Next, Figures 7A and 7B are right side views of the nozzle member and inner retaining member of a flush toilet pipe connection fixing device according to one embodiment of the present invention, as viewed from the right side of the rear side of the toilet body, showing the state before the inner retaining member is swung relative to the nozzle member (state before tilting), and the state after the inner retaining member has been swung relative to the nozzle member (state tilted).

[0027] As shown in FIGS. 5 to 7B, the nozzle member 42 and the inner holding member 46 each include a pair of holding grooves 56, 58 and a pair of holding protrusions 60, 62, respectively. When the pipe connection fixing device 40 is attached to the inlet 2e of the rim water channel 2d of the toilet body 2, these retaining grooves 56, 58 and retaining protrusions 60, 62 are fitted or engaged with each other as the female and male sides, respectively, and function as retaining parts that hold the inner retaining member 46 slidably and swingably relative to the nozzle member 42. Next, as shown in Figures 5 to 7B, the pair of retaining grooves 56, 68 of the nozzle member 42 are provided on the outer peripheral surface of the nozzle member 42 so as to face each other radially, and the shape of each groove is formed to be approximately L-shaped when viewed from the side. In addition, each retaining groove 56, 58 has a circumferential groove 56a, 58a (first retaining groove portion) formed on the outer peripheral surface of the nozzle member 42 along the circumferential direction for a predetermined length, and an axial groove 56b, 58b (second retaining groove portion) formed on the outer peripheral surface of the nozzle member 42 along the axial direction from one end of each circumferential groove 56a, 58a for a predetermined length.

[0028] Next, as shown in FIGS. 5 to 7B, the inner holding member 46 has an annular portion 64 formed in a generally annular shape. The annular portion 64 has an opening cross-section S1 (see Figure 6) whose interior is formed in a roughly elongated hole shape, a first central axis C1 extending in the longitudinal direction of the opening cross-section S1, and a second central axis C2 that bisects the first central axis C1 and extends in a direction (width direction) perpendicular to the longitudinal direction of the annular portion 64. Furthermore, the maximum outer dimension L1 (see FIG. 6) of the annular portion 64 is set larger than the maximum dimension (maximum inner diameter D2) of the opening cross section S2 (see FIG. 4) of the inlet 2e of the rim water channel 2d (L1>D2). Furthermore, the pair of holding projections 60, 62 described above are provided on the inner peripheral side of the annular portion 64 of the inner holding member 46 so as to face each other in the width direction of the annular portion 64. Each of the retaining protrusions 60, 62 includes a swing axis A1 that extends perpendicular to the axial direction of the nozzle member 42, and by each of the retaining protrusions 60, 62 rotating in one direction or the other around this swing axis A1, the entire annular portion 64 can swing relative to the nozzle member 42. Also, as shown in Figure 6, the oscillation axis A1 is set so as to be eccentric by a predetermined distance (eccentric distance L2) in the direction of the first center axis C1 relative to the second center axis C2 of the annular portion 64, and is set parallel to the second center axis C2.

[0029] Next, as shown in Figures 5 to 7B, the nozzle member 42 further includes a holding groove (swing restriction groove 66) which is a third holding groove portion that is cut out in a curved shape (generally crescent-shaped or arch-shaped) along the circumferential direction on its outer circumferential surface. As shown in FIG. 7B, the swing restriction groove 66 is capable of holding a part of the annular portion 64 of the inner holding member 46 in a swung state, other than the holding protrusions 60, 62. More specifically, as shown in Figure 6, when the opening cross section S1 of the annular portion 64 is divided into two opening cross sections (first opening cross section S3 and second opening cross section S4) so that the opening cross sections have different opening cross sections relative to the swing axis A1, the cross sectional area of the first opening cross section S3 becomes smaller than the cross sectional area of the second opening cross section S4. At this time, the arch-shaped portion (arch portion 64a) of the annular portion 64 that forms the first opening cross section S3 having a smaller cross-sectional area swings from an upright position in which it stands perpendicular to the axial direction of the nozzle member 42 as shown in Fig. 7A to the swing restriction groove 66 as shown in Fig. 7B, about the swing axis A1, and becomes engageable with the swing restriction groove 66 as shown in Fig. 7B. As a result, the entire inner holding member 46 is temporarily locked in an inclined position relative to the nozzle member 42. Then, as shown in Figure 7B, when the entire inner holding member 46 is temporarily locked in an inclined position relative to the nozzle member 42, the tip side of the nozzle member 42 and the entire inner holding member 46 can be inserted into the inside of the rim water conduit 2d through the opening of the inlet 2e of the rim water conduit 2d.

[0030] Next, with reference to Figures 8A to 8F, we will explain the assembly method for assembling the pipe connection fixing device 40 to the opening of the inlet 2e of the rim water channel 2d of the toilet body 2 when installing and constructing the flush toilet 1. Figures 8A to 8F each show the nozzle member and inner retaining member of the pipe connection fixing device in various states from before the assembly work begins to until the assembly work is completed when assembling the pipe connection fixing device to the inlet opening of the rim water channel of the toilet body during installation or the like of a flush toilet according to one embodiment of the present invention. First, as shown in Figure 8A, when assembling the spout pipe 8 to the ceramic toilet body 2, the nozzle member 42 is first inserted into the annular portion 64 of the inner retaining member 46, and then the pair of retaining protrusions 60, 62 of the inner retaining member 46 are inserted into and fitted into the circumferential grooves 56a, 58a of the nozzle member 42.

[0031] Next, as shown in FIG. 8B, the retaining protrusions 60, 62 of the inner retaining member 46 are slid along the circumferential grooves 56a, 58a of the nozzle member 42 from the circumferential tip side toward the circumferential base side, and are moved to the corners between the circumferential grooves 56a, 58a and the axial grooves 56b, 58b. Then, as shown in FIG. 8C, the holding protrusions 60, 62 of the inner holding member 46 are slid along the axial grooves 56b, 58b of the nozzle member 42, and move to the axial tip ends of the axial grooves 56b, 58b. At this time, the entire annular portion 64 (arch portion 64a) of the inner holding member 46 is also in a state in which it can swing about the swing axis A1.

[0032] Next, as shown in FIG. 8D, the holding protrusions 60, 62 of the inner holding member 46 rotate in the axial grooves 56b, 58b of the nozzle member 42 around the swing axis A1. The entire annular portion 64 (arch portion 64 a ) of the inner holding member 46 is tilted (dead) by swinging relative to the nozzle member 42 , and is then fitted into the swing restriction groove 66 . As a result, the annular portion 64 (arch portion 64a) of the inner retaining member 46 assumes a more inclined (decumulated) position toward the nozzle member 42 than at the start of the assembly work, and the entire inner retaining member 46 is held in a temporarily engaged state relative to the nozzle member 42. Furthermore, with the entire inner holding member 46 temporarily locked to the nozzle member 42 in this manner, both the nozzle member 42 and the inner holding member 46 can be inserted into the opening of the inlet 2e of the rim water conduit 2d.

[0033] Next, as shown in Figure 8E, both the nozzle member 42 and the inner retaining member 46, which is temporarily engaged with the nozzle member 42 and is in an inclined (dead-down) position, are inserted into the entrance 2e of the rim water channel 2d from the outside of the rear wall surface 2g of the rim portion 2c of the toilet body 2. FIG. 8F is a perspective view, seen from the inside of the water channel of the toilet body, of the flush toilet pipe connection fixing device according to one embodiment of the present invention, after the assembly work for the nozzle member and inner holding member has been completed. As shown in Figure 8F, when the entire inner retaining member 46, together with the nozzle member 42, passes through the opening of the inlet 2e of the rim conduit 2d and is inserted into the rim conduit 2d, the inner retaining member 46 is released from its temporary fixed state relative to the nozzle member 42 and swings again from its tilted (lying down) position to an upright position (standing position), with almost the entire inner retaining member 46 coming into contact with the inner wall surface 2h that forms the opening of the inlet 2e within the rim conduit 2d. Furthermore, the nozzle member 42 is rotated about its axial central axis A2, and the inner retaining member 46 is also rotated about the axial central axis A2 of the nozzle member 42. In this way, even though the installer on the front side of the toilet body cannot visually observe from inside the rim conduit 2d the inner retaining member 46 that has been inserted into the rim conduit 2d through the opening of the inlet 2e of the rim conduit 2d, they can adjust the degree of contact between the surface of the inner wall surface 2h inside the rim conduit 2d and the opposing contact surface of the inner retaining member 46. Then, with the nozzle member 42 held from the outside of the toilet body 2 by the outer holding member 44, the nut member 48 threaded onto the nozzle member 42 is tightened, whereby the nozzle member 42 is fixed to the inner wall surface 2h within the rim water channel 2d via the inner holding member 46, completing the assembly work.

[0034] Next, the operation of the flush toilet 1 according to one embodiment of the present invention described above will be explained with reference to Figures 1 to 8F. With the flush toilet 1 of this embodiment, when assembling the discharge pipe 8 (flush water supply pipe) connected to the pump 30 of the tank device 4 to the ceramic toilet body 2 during installation of the flush toilet 1, the outlet portion 8a of the discharge pipe 8 can be easily connected and fixed to the inlet 2e of the rim water channel 2d of the ceramic toilet body 2 via the pipe connection fixing device 40. Specifically, first, the holding portion (a pair of holding grooves 56, 58) of the nozzle member 42 of the pipe connection fixing device 40 provided at the outlet portion 8a of the water discharge pipe 8 and the holding portion (a pair of holding protrusions 60, 62) of the inner holding member 46 make it possible to easily attach the inner holding member 46 to the nozzle member 42 so that it can slide and swing relative to the nozzle member 42. Next, each of the retaining protrusions 60, 62 of the inner retaining member 46 can be easily slid relative to each of the retaining grooves 56, 58 of the nozzle member 42 so that the inner retaining member 46, together with the nozzle member 42, is in a position (inclined position) that allows it to be inserted into the rim water channel 2d from the opening of the inlet 2e of the rim water channel 2d of the toilet body 2. Thereafter, the inner holding member 46 can be easily swung and tilted (fallen down) until a part of the arch portion 64a of the inner holding member 46 abuts against the swing restriction groove 66 of the nozzle member 42. As a result, the inner holding member 46 of the pipe connection fixing device 40 is temporarily fixed in an inclined (dead-down) position relative to the nozzle member 42. Then, both the nozzle member 42 and the inner holding member 46 become insertable from the opening of the inlet 2e of the rim water conduit 2d. Next, the entire inner holding member 46 of the pipe connection fixing device 40 together with the nozzle member 42 can be easily inserted into the rim water conduit 2d through the opening of the inlet 2e of the rim water conduit 2d. After this insertion, the inner holding member 46 can be released from the state in which it was temporarily fixed to the nozzle member 42, and can be swung again from the inclined (decumulated) position to the upright position (standing position). This allows almost the entire inner holding member 46 to easily come into contact with the inner wall surface 2h that forms the opening of the inlet 2e within the rim water conduit 2d (see FIGS. 4 and 8F). Therefore, even if the installer on the front side of the toilet body cannot visually see the inner retaining member 46 inserted into the rim conduit 2d from the opening of the inlet 2e of the rim conduit 2d from inside the rim conduit 2d, the nozzle member 42 can be easily held by the inner retaining member 46 from inside the rim conduit 2d. The nozzle member 42 can be held from the outside of the toilet body 2 by the outer holding member 44 of the pipe connection fixing device 40 (nut member 48, pressing member 50, packing 52, O-ring 54). These allow the inner retaining member 46 to be securely fixed (locked) to the inner wall surface 2h of the rim conduit 2d when inserted into the rim conduit 2d from the opening of the inlet 2e of the rim conduit 2d. At the same time, the nozzle member 42 can be securely fixed (locked) to the inner wall surface 2h of the rim conduit 2d via the inner retaining member 46. As a result, the outlet portion 8a of the discharge pipe 8 can be easily and reliably fixed and assembled to the toilet body 2, even with respect to the entrance 2e of the rim water conduit 2d of the ceramic toilet body 2 which has manufacturing errors, and the inner wall surface 2h of the rim water conduit 2d which forms its opening (i.e., a wall surface which has variations in surface shape such as unevenness due to ceramic manufacturing errors). Therefore, the ease of installation of the flush toilet 1 can be improved.

[0035] Furthermore, with the flush toilet 1 of this embodiment, when the nozzle member 42 is inserted into the opening of the inlet 2e of the rim water conduit 2d, it can be tilted by swinging it around the swing axis A1 until part of the arch portion 64a of the annular portion 64 of the inner retaining member 46 abuts against the swing restriction groove 66 of the nozzle member 42. This allows the inner holding member 46 to be temporarily fixed to the swing restriction groove 66 of the nozzle member 42 in an inclined (dead) position that allows insertion together with the nozzle member 42 . Therefore, even if the maximum dimension L1 of the outer shape of the annular portion 64 of the inner retaining member 46 is set larger than the maximum dimension (maximum inner diameter D2) of the opening cross section S2 of the inlet 2e of the rim water conduit 2d, both the nozzle member 42 and the inner retaining member 46 can be easily inserted through the opening of the inlet 2e of the rim water conduit 2d. Furthermore, when the entire inner retaining member 46, together with the nozzle member 42, has passed through the entrance 2e of the rim water conduit 2d and is inserted into the rim water conduit 2d, the annular portion 64 of the inner retaining member 46 is released from its temporary fixed state relative to the swing restriction groove 66 of the nozzle member 42, and can again swing around the swing axis A1. At this time, because the maximum dimension L1 of the outer shape of the annular portion 64 of the inner retaining member 46 is larger than the maximum dimension (maximum inner diameter D2) of the opening cross section S2 of the inlet 2e of the rim water conduit 2d, almost the entire annular portion 64 of the inner retaining member 46 can come into contact with the inner wall surface 2h (ceramic surface) that forms the opening of the inlet 2e within the rim water conduit 2d in a state that is less susceptible to unevenness due to manufacturing errors in the ceramic material. This allows both the nozzle member 42 and the inner holding member to be securely fixed (locked) to the inner wall surface 2h (ceramic surface) of the rim water conduit 2d, making them less likely to come off. As a result, when assembling the discharge pipe 8 to the ceramic toilet body 2, it is possible to provide a pipe connection fixing device 40 that makes it easy to insert both the nozzle member 42 and the inner retaining member into the opening of the inlet 2e of the rim water conduit 2d, and makes it difficult to come off after insertion.

[0036] Furthermore, with the flush toilet 1 of this embodiment, when assembling the discharge pipe 8 to the toilet body 2, each of the pair of retaining protrusions 60, 62 of the inner retaining member 46 can be easily attached in advance to either the first retaining groove portion (circumferential grooves 56a, 58a) or the second retaining groove portion (axial grooves 56b, 58b) of the nozzle member 42, improving ease of assembly. Each of the pair of holding protrusions 60, 62 of the inner holding member 46 is held slidably and rotatably along the first holding groove portion (circumferential grooves 56a, 58a) or the second holding groove portion (axial grooves 56b, 58b) of the nozzle member 42. This allows each of the pair of retaining protrusions 60, 62 of the inner retaining member 46 to slide circumferentially around the nozzle member 42 along the first retaining groove portions (circumferential grooves 56a, 58a) and also slide axially around the nozzle member 42 along the second retaining groove portions (axial grooves 56b, 58b), making it easy to adjust the relative position of the inner retaining member 46 with respect to the nozzle member 42. Furthermore, each of the pair of retaining protrusions 60, 62 of the inner retaining member 46 can be rotated in the first retaining groove portion (circumferential grooves 56a, 58a) or the second retaining groove portion (axial grooves 56b, 58b) of the nozzle member 42, allowing the annular portion 64 of the inner retaining member 46 to swing relative to the nozzle member 42. This makes it possible to easily adjust the posture (upright posture, or inclined posture and its angle of inclination) of the annular portion 64 of the inner holding member 46 relative to the nozzle member 42.

[0037] Furthermore, with the flush toilet 1 of this embodiment, when the inner retaining member 46 is inserted into the rim water conduit 2d together with the nozzle member 42 from the opening of the inlet 2e of the rim water conduit 2d, a part of the annular portion 64 of the inner retaining member 46 other than the retaining protrusions 60, 62 (arch portion 64a) swings up to the third retaining groove portion (swing restriction groove 66) of the nozzle member 42, and is held in an inclined (dead) state. As a result, when the nozzle member 42 and the inner holding member 46 are inserted into the opening of the inlet 2e of the rim water conduit 2d, the maximum dimension L3 (see FIG. 7B) of the cross section S5 perpendicular to the axial direction of the inserted portion can be made smaller than the maximum inner diameter D2 (see FIGS. 4 and 8E) of the opening of the inlet 2e of the rim water conduit 2d (L3 <D2)。 Therefore, even if the maximum dimension L1 of the outer shape of the annular portion 64 of the inner retaining member 46 is set larger than the maximum dimension (maximum inner diameter D2) of the opening cross section S2 of the inlet 2e of the rim water conduit 2d (L1>D2), both the nozzle member 42 and the inner retaining member 46 can be smoothly inserted from the opening of the inlet 2e of the rim water conduit 2d, thereby improving workability.

[0038] Furthermore, with the flush toilet 1 according to this embodiment, the swing axis A1 of the annular portion 64 of the inner holding member 46 is eccentric with respect to the second central axis C2. This makes it easier to swing the entire inner retaining member 46 around the swing axis A1 when inserting the inner retaining member 46 and the nozzle member 42 into the opening of the inlet 2e of the rim water conduit 2d, until a part of the arch portion 64a of the annular portion 64 of the inner retaining member 46 comes into contact with the swing restriction groove 66 of the nozzle member 42. Therefore, even if the maximum dimension L1 of the outer shape of the annular portion 64 of the inner retaining member 46 is set to be larger than the maximum inner diameter D2 of the opening cross section S2 of the inlet 2e of the rim water conduit 2d, the inner retaining member 46 and the nozzle member 42 can be brought into a state where they can be smoothly inserted before being inserted into the opening of the inlet 2e of the rim water conduit 2d. Furthermore, even when the entire inner retaining member 46, together with the nozzle member 42, has passed through the opening of the inlet 2e of the rim water conduit 2d and is inserted into the rim water conduit 2d, the annular portion 64 of the inner retaining member 46 is released from its temporary fixed state relative to the nozzle member 42, making it easier to swing the entire inner retaining member 46 again around the swing axis A1. This allows both the nozzle member 42 and the inner holding member 46 to be smoothly fixed (locked) to the inner wall surface 2h (ceramic surface) within the rim water conduit 2d, making them less likely to come off.

[0039] Furthermore, with the flush toilet 1 of this embodiment, all of the flush water supplied from the water storage tank 10 to the discharge pipe 8 by the pump 30 is supplied from the inlet 2e of the rim water conduit 2d through the rim water conduit 2d into the bowl portion 2a, allowing toilet flushing (so-called toilet flushing using 100% rim water discharge). Therefore, the size of the opening of the inlet 2e of the rim water channel 2d of the ceramic toilet body 2 can be set relatively large. This allows the size of the flow channel cross section of the water passage 42a and the water discharge port 42b of the nozzle member 42 connected to the opening of the inlet 2e of the rim water conduit 2d to be set large. Therefore, the pressure loss of the wash water passing through the water passage 42a and the water discharge port 42b in the nozzle member 42 can be reduced. Furthermore, since the size of the opening of the inlet 2e of the rim water conduit 2d can be set relatively large, the pipe connection fixing device 40 can have a simple structure that makes it easy to connect and fix the outlet portion 8a of the discharge pipe 8 to the opening of the inlet 2e of the rim water conduit 2d. As a result, the discharge pipe 8 can be easily and reliably assembled to the rim water conduit 2d of the ceramic toilet body 2, improving workability.

[0040] In this embodiment, a water storage tank 10 is used as the flush water source for the discharge pipe 8 that supplies flush water to the toilet body 2, and the flush water in this water storage tank 10 is supplied from the discharge pipe 8 to the rim water channel 2d of the toilet body 2 using the supplemental pressure of the pump 30, but this is not limited to this configuration, and other configurations can also be applied as the flush water source for the discharge pipe 8. For example, the form of the flushing water source upstream of the discharge pipe may be a gravity-fed water storage tank, a direct water pressure type that directly utilizes the water supply pressure of tap water, or a flush valve type. [Explanation of symbols]

[0041] 1. A flush toilet according to one embodiment of the present invention 2 Toilet body 2a Bowl section 2b Drain trap pipe 2c rim section 2d rim channel 2e Rim waterway entrance (rim waterway entrance) 2F Rim Spout 2g Rear wall of rim 2h Inner wall forming the entrance opening in the rim channel 4 Tank system (cleaning water source) 6 Water supply pipe 8. Discharge pipe (flush water supply pipe) 8a Outlet of the discharge pipe (outlet of the flushing water supply pipe) 10. Water Tank 10a Upper opening 12 Stop valve 14 Valve unit 16 Constant flow valve 17 Diaphragm valve 18 Solenoid valve 20 Connecting Units 22 Tank Unit 24 Housing 24a Lower opening 24b Overflow port 26 Overflow pipe 28 Check valve 30 Pump (cleaning water source) 32 Float switch 34 Drain plug 36 Water pipe 36a Upstream end of water pipe 38 Suction tube 38a Downstream end of suction pipe 40 Pipe connection fixing device 42 Nozzle member (nozzle part) 42a Canal 42b Outlet 44 Outer holding member 46 Inner retaining member 48 Nut member (outer retaining member) 50 holding member (outer holding member) 50a flange 52 Packing (outer retaining member) 54 O-ring (outer holding member) 56 Retaining groove (retaining part) 56a Circumferential groove (first holding groove) 56b Axial groove (second retaining groove) 58 Retaining groove (retaining part) 58a Circumferential groove (first holding groove) 58b Axial groove (second retaining groove) 60 Holding protrusion (holding part, holding protrusion) 62 Holding protrusion (holding part, holding protrusion) 64 Annular portion of inner retaining member 64a Arch part 66 Swing restriction groove (retaining portion, third retaining groove portion) A1 Swing axis A2: Central axis of the nozzle member C Controller C1: A first central axis extending in the longitudinal direction of the annular portion of the inner holding member C2: A second central axis extending in the width direction of the annular portion of the inner holding member D1 Water outlet diameter D2 Maximum inner diameter of the opening cross section of the rim channel inlet L1 Maximum outer dimension of the annular part of the inner retaining member L2 eccentricity distance L3: Maximum cross-sectional dimension perpendicular to the axial direction of the nozzle member and inner holding member when inserted S1 Opening cross section of the annular part of the inner retaining member S2 Opening cross section of the rim channel entrance S3 First opening cross section of annular portion of inner retaining member S4 Second opening cross section of annular portion of inner retaining member

Claims

1. A flush toilet that is flushed with flush water to discharge waste, a cleaning water source for supplying cleaning water; a ceramic toilet body having a bowl portion for receiving waste, a rim portion formed on the upper edge of the bowl portion, and a rim water channel provided in the rim portion for guiding flushing water to the bowl portion; a flush water supply pipe connected between the flush water source and the toilet body, for supplying flush water from the flush water source to the rim water channel of the toilet body; a pipe connection and fixing device that is provided at the outlet of the flush water supply pipe and fixes the outlet in a connected state to the inlet of the rim water channel of the toilet body, the pipe connection fixing device is provided at the outlet of the flush water supply pipe, and a nozzle portion that can be inserted into the rim conduit from an opening at the inlet of the rim conduit; an inner holding member that is slidably and swingably attached to the nozzle portion, and that is capable of holding the nozzle portion from inside the rim conduit when inserted into the rim conduit from the inlet of the rim conduit together with the nozzle portion; an outer holding member capable of holding the nozzle portion from the outside of the toilet body in a state in which the nozzle portion is inserted into the rim water conduit from the inlet portion of the rim water conduit, A flush toilet characterized in that the nozzle portion and the inner retaining member are each provided with a retaining portion that holds the inner retaining member so that it can slide and swing relative to the nozzle portion when the pipe connection fixing device is attached to the inlet portion of the rim water channel of the toilet body.

2. The flush toilet according to claim 1, wherein the inner retaining member has an annular portion formed in a ring shape whose maximum outer dimension is larger than the maximum dimension of the opening cross section of the inlet of the rim water channel, and this annular portion has a swing axis that extends in a direction perpendicular to the axial direction of the nozzle portion, and is capable of swinging relative to the nozzle portion around this swing axis.

3. the holding portion of the inner holding member includes a pair of holding projections provided opposite to each other on the inner peripheral side of the annular portion so as to include the swing axis, The flush toilet according to claim 2, wherein the nozzle portion's retaining portion comprises: a first retaining groove portion formed along the circumferential direction of the outer peripheral surface of the nozzle portion, which slidably and rotatably holds each of the pair of retaining protrusions; and a second retaining groove portion formed from one end of the first retaining groove portion in the axial direction of the nozzle portion, which slidably and rotatably holds each of the pair of retaining protrusions.

4. The flush toilet according to claim 3, wherein the retaining groove portion of the nozzle portion further comprises a third retaining groove portion that is curvedly cut out along the circumferential direction of the outer peripheral surface of the nozzle portion, and this third retaining groove portion is capable of retaining a portion of the annular portion of the inner retaining member other than the retaining protrusion portion when the inner retaining member is in a swinging state.

5. the annular portion of the inner holding member has an opening cross-section formed in a generally elongated hole shape, a first central axis extending in the longitudinal direction of the opening cross-section, and a second central axis bisecting the first central axis and extending in a width direction perpendicular to the longitudinal direction of the annular portion, 5. The flush toilet according to claim 2, wherein the swing axis is set eccentrically relative to the second central axis of the annular portion.

6. A flush toilet according to any one of claims 1 to 5, wherein the toilet body is configured so that all of the flush water supplied from the flush water source to the flush water supply pipe is supplied from the inlet of the rim conduit through the rim conduit into the bowl portion.

Images