JP2000309969A - Water supply method to flush toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water supply method to a flush toilet capable of preventing freezing of water at the upstream of a toilet stool. SOLUTION: In a water supply method to a tankless toilet stool supplying water fed from a supply pipe 9 through a flexible hose 21, a branching device 2, a conduct pipe 23, and a toilet cleaning device 3 to the toilet stool body 1 of the tankless toilet stool, a cutoff valve 22 as a flow changeover means through which water flow can be changed over to the flexible hose or the like and opening/closing valves 4R, 4J are provided. In the cutoff valve 22, water is flowed at 100% of flow rate to carry out the fluid mode in which freeze of water at the upstream of the toilet stool body 1 can be prevented according to the opening of the valves 4R, 4J.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for supplying water to a flush toilet. This water supply method is particularly suitable for use in a tankless toilet which is a flush toilet without a toilet flush tank.

[0002]

2. Description of the Related Art In a common flush toilet, water supplied from a water supply pipe such as a water pipe is temporarily stored in a toilet wash tank such as a low tank, and the stored water is supplied to the toilet wash tank. The main body is cleaned. Such a common flush toilet requires a large space for installing a toilet flush tank.

[0003] Therefore, in recent years, a tankless toilet which is a flush toilet without a toilet washing tank is being developed from the viewpoint of effective use of the space in the toilet (Japanese Patent Laid-Open No. Hei 3 (1994)).
-90723). In this tankless toilet, a toilet flushing device having a function of washing the toilet body with water directly supplied from a water supply pipe is provided, and a water pipe or the like is opened by an opening / closing valve incorporated in the toilet flushing device. Is to supply water directly from the water supply pipe to the toilet body.
This on-off valve has a solenoid valve that is turned on and off, and a diaphragm that bends when the solenoid valve is turned on. The flexure of the diaphragm enables the communication between the water inlet port and the water discharge port of the on-off valve to be opened and closed. ing.

[0004]

However, in the above-mentioned general flush-type toilets and tankless toilets, no consideration is given to freezing of a water supply pipe such as a water pipe and a water supply channel leading to a toilet body in cold weather. For this reason, in these flush toilets, if water is frozen on the upstream side of the toilet body, the excrement discharged into the toilet body cannot be removed by flowing. For this reason, use of these flush toilets is restricted until the frozen state is eliminated, which impairs daily life and is unsanitary.

[0005] In particular, when the flush toilet is a tankless toilet without a toilet flush tank, the flow rate of water flowing in the water supply passage of the toilet flushing device cannot be switched stepwise in the conventional tankless toilet. Therefore, a user or the like cannot always avoid the above problem, and the above problem becomes remarkable. The present invention has been made in view of the above circumstances, and has as an object to solve the problem of providing a method of supplying water to a flush toilet capable of preventing freezing of water on the upstream side of the toilet body.

[0006]

SUMMARY OF THE INVENTION A method of supplying water to a flush toilet according to the present invention is a method of supplying water to a flush toilet by supplying water supplied from a water supply pipe to a toilet body of the flush toilet via a water supply channel. In the flow mode, the water supply path is provided with flow rate switching means capable of switching the flow rate of water in a stepwise manner, and the flow rate switching means flows water at a flow rate capable of preventing freezing of water on the upstream side of the toilet body. Is performed.

According to the water supply method of the present invention, a flow rate switching means is provided in a water supply path for supplying water supplied from a water supply pipe to the toilet body, and the flow mode is performed by switching the flow rate switching means.
This allows the water from the water supply pipe to flow into the water supply channel little by little, so that freezing of water on the upstream side of the toilet body is suppressed. For this reason, in the flush toilet using such a water supply method, water is hardly frozen on the upstream side of the toilet main body, and it is possible to avoid inability to wash excrement. For this reason, in this flush toilet, use restrictions that hinder daily life are eliminated, and the toilet becomes sanitary.

[0008] The amount of water per unit time in the flow mode can be appropriately selected depending on the degree of cold and the like. For example, when the normal amount of water flowing by the flow rate switching means is 100%, 0.5 to 15%, particularly 1 to 10%
%, And even 2-5%. According to the water supply method of the present invention, the flow rate switching means includes a stopcock capable of continuously adjusting the flow rate of water flowing in the water supply passage, and an on-off valve for opening and closing the water supply passage downstream of the water stopcock. In the stopcock, a mode in which water flows at a flow rate of 100% and the flow mode is performed by opening the on-off valve can be adopted. In this case, the on-off valve has an opening adjustment mechanism to achieve the flow mode.

Further, according to the water supply method of the present invention, the flow switching means includes a step stopcock capable of adjusting a flow rate of water flowing in the water supply passage in a stepwise manner, and a water supply stoppipe downstream of the step stopcock. It is also possible to adopt a configuration in which a switching valve is provided to open and close the road, the flow mode is performed by a step stopcock, and the opening and closing valve flows water at an opening of 100%. In this case, the staged stopcock has a flow control mechanism for the water to achieve the flow mode.

The on-off valve includes a valve housing having an inlet port for supplying water in communication with a water supply pipe and an outlet port for supplying water to a flow path of the toilet body, and a valve protruding from the valve housing. It is possible to adopt a form having a shaft movably provided in the housing for opening and closing communication between the water inlet port and the water outlet port, and the shaft being moved by a cam.

The cam is a mechanism for reciprocating a shaft, which is a follower, as the rotating body rotates. Unlike the solenoid valve, which is assumed to be fully closed and fully open, the cam can stop the valve opening / closing amount at an intermediate stage. Suitable for. When a cam is used, the opening / closing speed of the on-off valve can be set arbitrarily by selecting the profile of the cam surface, so that rapid opening / closing can be suppressed, and noise and water can be suppressed. Hammer can also be reduced.

Preferably, the cam is driven by a motor. In this case, when the user operates the motor, the cam is driven and the shaft of the on-off valve is automatically moved, so that the communication between the inlet port and the outlet port can be automatically opened and closed. it can. As the motor, a forward rotation motor, a forward rotation and reverse rotation motor, a stepping motor whose rotation amount is defined according to the number of input pulses, and the like can be used.

The cam may be of a type that can be driven manually. In this case, even in the event of a power failure or motor failure, by driving the cam, it is possible to execute not only the flushing of the toilet body but also the flow mode. According to the water supply method of the present invention, in the flow mode, a mode in which water is intermittently flowed into the water supply passage at predetermined time intervals (generally, a short time period) in consideration of the degree of cold, the need for water saving, and the like. Can also be adopted. That is, a mode in which the small amount of water flow and the water flow stop are alternately repeated may be adopted. In this case, it is possible to save water while suppressing freezing. Such a mode can be easily executed by a program if a control device using a microcomputer is used to control flow stop means such as a stopcock or a step stopcock and an on-off valve.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1 and 2 embodying the present invention will be described below with reference to the drawings. (Embodiment 1) In Embodiment 1, the present invention is embodied in a tankless toilet having no toilet washing tank as a flush toilet. In this tankless toilet, as shown in FIG. 1, a water stop valve 22 connected to a water supply pipe 9 such as a water pipe or the like as a flow switching valve flows water at a flow rate of 100%.
The flow mode is not to be executed with the opening degrees of R and 4J.

The toilet body 1 includes a bowl portion 1 for receiving excrement.
0, a rim 13 having a rim water passage 12 wrapped around the upper periphery of the bowl portion 10, and a bowl portion 10
And a trap portion 14 that communicates with the bottom of the toilet and allows excrement to flow. A jet nozzle 15 is attached to the entrance of the trap unit 14. The jet body 1 has a jet nozzle 1
A jet conduit 18 as a flow path for supplying water to the rim 5 and a rim conduit 19 as a flow path for supplying water to the rim water passage 12 are provided. As shown in FIG. 3, the rim conduit 19 has an opening 19a that opens to the distal end side and can discharge water clockwise.
And opening 19b that opens to the side and can discharge water counterclockwise
And

As shown in FIG. 2, on one side in the width direction of the rear portion of the toilet body 1, a branching device 2 for separating water for toilet flushing and water for other uses is provided. Branching device 2
Is connected to the water supply pipe 9 via a water stopcock 22 by a flexible hose 21 which is a part of a water supply path. The water stopcock 22 is of a known rotary-top type. Branching device 2
The toilet flushing device 3 communicates with the toilet flushing device 3 via a conduit 23 which is a part of a water supply channel, and the water branched by the branching device 2 is supplied via the conduit 23 to the toilet flushing device 3 which is the rest of the water supply channel. You. Here, the water stopcock 22 to which the flexible hose 21 is connected, and the on-off valves 4J and 4R constitute a flow rate switching means. The toilet lid and the toilet seat are omitted in FIGS.

As shown in FIG. 2, the toilet flushing device 3 is incorporated in a base plate 31 held at the rear of the toilet body 1 at a position opposite to the branching device 2.
2 and is concealed. This toilet bowl cleaning device 3
Are the on-off valve 4R for the rim and the on-off valve 4J for the jet
And a cam device 8 that functions as a common drive source for opening and closing the on-off valves 4R and 4J. Two on-off valves 4
R and 4J have a vertically long shape and are arranged adjacent to each other. Thereby, compactness is achieved.

As shown in FIGS. 5A and 5B, the on-off valve 4J for the jet includes a vertically long valve housing 41 having an inlet port 42 for taking in water and an outlet port 43 for discharging water. And a valve mechanism 45 provided in the housing 41. A piston chamber 44 communicating with a water inlet port 42 and a water outlet port 43 is provided inside the valve housing 41.
Are formed. The valve mechanism 45 is coaxial with a piston 46, which is a movable body slidably provided in the piston chamber 44, and one end surface 46 a (upper end surface) of the piston 46 so as to project upward from the upper end of the valve housing 41. And a fixed shaft 47. The shaft 47 is the piston 4
6 and is made of metal or hard resin with a circular cross section and has rigidity different from a chain. The shaft 47 extends along the longitudinal direction of the toilet body 1,
That is, it extends along the height direction of the toilet body 1. By extending the shaft 47 in the vertical direction in this manner, it is possible to prevent the distal end portion of the shaft 47 from protruding greatly behind the toilet body 1, and to contribute to a reduction in installation space. The boundary area between the shaft 47 and the valve housing 41 is sealed by an O-ring 49.

In the valve housing 41, the water inlet port 4
Numeral 2 is opened on the peripheral surface side of the piston 46 and communicates with the conduit 23, and the water outlet port 43 is bent open from the axial one end surface 46 a side of the piston 46 to the side surface side of the valve housing 41. In FIGS. 5A and 5B, the water outflow port 43 does not originally appear as a cross section, but is shown as a cross section for easy understanding. An O-ring 48 is held in a ring groove at an outer peripheral portion of the piston 46, and a boundary area between the outer peripheral portion of the piston 46 and the inner wall surface of the valve housing 41 is sealed by the O-ring 48.

In the piston chamber 44, a pressure canceling chamber 50 is formed by the valve housing 41 and the other end surface 46b of the piston 46. The pressure canceling chamber 50 communicates with the water outlet port 43 via a plurality of communication passages 51 formed in the piston 46. Each communication passage 51 has a piston 46
The one end surface 46a side and the other end surface 46b side communicate with each other in the axial direction. In the pressure canceling chamber 50, a pressing coil spring 52 as an urging means is coaxially arranged. The pressing coil spring 52 is connected to the valve housing 41 and the other end surface 46 b of the piston 46.
, The piston 46 is constantly urged in the direction of arrow Y1, that is, upward, so that the inclined surface 46x of the piston 46 is seated on the inclined seat surface 41x of the valve housing 41k, and the water inlet port 42 and the water outlet port 43 are provided. The communication with is closed.

More specifically, since the communication between the water inlet port 42 and the water outlet port 43 is opened and closed by the piston 46, the piston 46 receives pressure on the other side, that is, in the direction of arrow Y2 by the water in the water outlet port 43. It will be. Due to the pressure on the other side, there is a possibility that the smooth sliding property of the piston 46 in the axial direction may be impaired. In this regard, in the on-off valves 4J and 4R of the first embodiment, a pressure canceling chamber 50 is formed on the other side of the piston 46, and the piston 46
Of the piston 46 and the pressure canceling chamber 50 are communicated with each other by the plurality of communication passages 51, so that water existing on the one end surface 46 a side of the piston 46 moves to the pressure canceling chamber 50 via the communication passage 51. Then, the pressure of the water in the pressure canceling chamber 50 and the pressure of the water on the one end surface 46a side of the piston 46 are balanced, and the pressure difference between them is eliminated or reduced. Thereby, the axial slidability of the piston 46 is ensured.

The shaft 47 projects upward from the valve housing 41 and is pressed by the cam device 8 in the direction of arrow Y5, that is, downward. When the tip of the shaft 47 is pressed in the direction of the arrow Y5 by the cam device 8, the piston 46 slides in the same direction in conjunction therewith, and the piston 46 separates from the seat surface 41x to open the valve. The outflow port 43 is in communication.

The internal structure of the rim on-off valve 4R is substantially the same as the internal structure of the jet on-off valve 4J, and will not be described. Through a ring-shaped communication passage 54 formed between the valve housing 41 and the outer peripheral surface of the piston 46, the water inlet port 4 of the on-off valve 4J for jet is provided.
2 and the water inlet port 42 of the rim on-off valve 4R communicate with each other.

In the toilet bowl washing apparatus 3, as shown in FIG. 2, a connection member 6J is provided on the jet on-off valve 4J so as to project toward the front of the toilet bowl 11, and the connection member 6J is provided. A vacuum breaker 61J is integrally provided at the upper end of the vacuum breaker. The vacuum breaker 61J communicates with the water outlet port 43 of the on-off valve 4J and communicates with the atmosphere. As shown in FIG. 2, a connection member 6R is provided on the rim on-off valve 4R so as to protrude toward the front part of the toilet bowl 11, and a vacuum breaker 61R is integrated with an upper end of the connection member 6R. It is provided in. The vacuum breaker 61R communicates with the water outlet port 43 of the on-off valve 4R and also communicates with the atmosphere.

As shown in FIG. 7, a flange 42a is formed in the water inlet port 42, and the distal end of the conduit 23 is connected to the flange 42a. In addition, the connecting member 6J,
Each of the flanges 6R is formed with a flange 6e, and a jet conduit 18 and a rim conduit 19 are connected to a water outlet port 6c of each flange 6e. As shown in FIG. 2, the toilet flushing device 3 includes a cam device 8 for opening and closing the on-off valve 4J for jet and the on-off valve 4R for rim. The cam device 8 is provided at the upper end in the axial direction of the on-off valves 4R and 4J, and is fixed to a bracket 82 having two mounting pieces 81 protruding forward, that is, toward the front side of the toilet bowl 11. That is, the cam device 8 includes a rotating shaft 83 as a rotating body rotatably held by the mounting piece 81 in a horizontal state.
And a first cam 85 and a second cam 86 which are juxtaposed to the rotating shaft 83 so as to project in a direction perpendicular to the axis thereof. The rotation shaft 83 extends along the width direction of the toilet bowl 11. When the rotation shaft 83 rotates, the first cam 85 and the second
The cam 86 rotates along the height direction of the toilet bowl 11. As a result, as shown in FIG. 7, the cam surface on the outer periphery of the first cam 85 contacts the slider 47x at the upper end of the shaft 47 of the on-off valve 4R for the rim and moves it downward (in the direction of arrow Y5). At the same time, the cam surface on the outer periphery of the second cam 86 comes into contact with the slider 47x at the upper end of the shaft 47 of the on-off valve 4J for jet to move it downward.

In the toilet flushing device 3, a driving device 7 for driving the cam device 8 is provided adjacent to the cam device 8. The driving device 7 is fixed to one of the mounting pieces 81 of the bracket 82, has a built-in motor 71 and a reduction gear for transmitting the rotating force of the motor 71 to the rotating shaft 83, and rotates under the control of a controller (not shown). The shaft 83 can be driven to rotate. Further, the driving device 7 is provided with a manual shaft 74 for manually rotating the rotation shaft 83 of the cam device 8 so as to be located on the side of the toilet body 1. The manual shaft 74 has an operation handle 75, and the operation handle 75
At the same time, it is detachable from the toilet flushing device 3. If the manual shaft 74 is detached when not in use, space can be saved. In addition, as shown in FIG. 2, the above-mentioned on-off valves 4R, 4J, motor 71 and cam device 8 are attached to the rear of the toilet body 1 by a single common base plate 31.

In the tankless toilet constructed as described above, the water supply pipe 9, the water stopcock 22, the flexible hose 21,
Water is supplied to the toilet flushing device 3 via the branching device 2 and the conduit 23. In the toilet flushing device 3, the two on-off valves 4J and 4R are closed unless a user operates the switch to clean the toilet bowl 11. In other words, as described with reference to FIGS. 5A and 5B, the piston 46 is moved in one axial direction, that is, in the direction of the arrow Y1 by the urging force of the pressing coil spring 52. Therefore, as shown in FIG. 5A, the inclined surface 46x of the piston 46 is seated on the seat surface 41x of the valve housing 41, the outer peripheral surface of the piston 46 closes the water inlet port 42, and one end surface of the piston 46 is closed. 46
a closes the outflow port 43. Therefore, the communication between the water inlet port 42 and the water outlet port 43 is closed,
Water is not supplied to the toilet body 1.

When washing the toilet bowl 11,
Based on the user's operation of the switch, the motor 71 of the driving device 7 is driven by the signal of the controller, and the rotating shaft 83 is driven to rotate. Thus, the cam surface of the first cam 85 moves the shaft 47 of the rim on-off valve 4R downward (arrow Y5).
Direction) to open the rim on-off valve 4R. 5A and 5B, the pressing coil spring 52
Is elastically contracted, and the piston 46 moves downward in the other axial direction, that is, in the arrow Y2 direction. Therefore, as shown in FIG. 5B, the piston 46 is attached to the seat surface 4 of the valve housing 41.
The valve is opened apart from 1x and the communication between the water inlet port 42 and the water outlet port 43 is opened. Thereby, the toilet flushing device 3 supplies water to the rim water passage 12 through the rim conduit 19,
The inner wall surface of the bowl 10 is cleaned.

With the driving of the cam device 8, the cam surface of the first cam 85 does not press the shaft 47 of the rim on-off valve 4R downward, and the rim on-off valve 4R closes. Thereafter, the cam surface of the second cam 86 presses the shaft 47 of the jet on-off valve 4J downward, thereby opening the jet on-off valve 4J. As a result, the toilet flushing device 3 supplies water to the jet nozzle 1 through the jet conduit 18.
5 to force siphon action in the trap section 14.

Next, with the driving of the cam device 8, the cam surface of the second cam 86 is moved to the shaft 4 of the on-off valve 4J for jet.
7 is no longer pressed downward, and the on-off valve 4J for jet
Will be closed. Thereafter, the cam surface of the first cam 85 presses the shaft 47 of the rim on-off valve 4R downward again to open the rim on-off valve 4R again. As a result, the toilet flushing device 3 supplies water to the rim water passage 12 through the rim conduit 19 and seals the bowl portion 10.

In cold weather, the water supply pipe 9, the water stopcock 22, the flexible hose 21, the branching device 2, and the conduit 23 may freeze. Therefore, when freezing is expected, the flow mode of the on-off valves 4J, 4R is executed in advance. That is, in the flow mode according to the first embodiment,
As shown in FIG. 5C, in order to maintain the opening of the water stopcock 22 so as to flow at a flow rate of 100% and execute the flow mode with the on-off valves 4J and 4R, as shown in FIG. Decrease the degree. In this flow mode, the open / close valves 4J, 4
When the opening degree at which the water inlet port 42 and the water outlet port 43 in R are completely communicated is 100%, the first of the cam device 8
The degree of opening is set to about 2 to 5% by setting the profiles of the cam surfaces of the cam 85 and the second cam 86.

In the flow mode, the pressing coil spring 5
2 and the downward force from the cam device 8 are balanced, and the piston 46 is slightly separated from the seating surface 41x of the valve housing 41 and is maintained. In this state, the water inlet port 42 and the water outlet port 43 are minutely opened, so that a small amount of water can be continuously discharged and flowed to the toilet body 1, and the water supply pipe 9 and the water stopcock in cold weather 22,
The freezing of the flexible hose 21, the branching device 2, and the conduit 23 is prevented. Since the freezing is prevented in this manner, when the toilet body 1 is used in cold weather, if the cam device 8 is driven by a switch operation, the water can flow into the toilet body 1 to remove the excrement satisfactorily. can do. For this reason, in the tankless toilet that adopts such a water supply method, there are no restrictions on use that hinder daily life and sanitation is achieved.

Further, even at the time of power failure or motor failure,
If the operating shaft 75 is operated and the rotating shaft 83 of the cam device 8 is manually driven by the manual shaft 74, not only the washing of the toilet body 1 but also the flow mode can be executed. In the flow mode according to the first embodiment, if the first cam 85 and the second cam 86 of the cam device 8 are rotated by a small angle, water is continuously discharged to the toilet body 1 to prevent freezing of water. In addition, the opening degree of the on-off valves 4J and 4R can be reduced at predetermined time intervals, whereby the amount of water to be discharged can be intermittently reduced to save water.

In the first embodiment, the shaft 47 is
Since it is configured to be pushed by the cam device 8 to open the communication between the water inlet port 42 and the water outlet port 43,
The structure is relatively simple, and the manufacturing cost can be reduced. (Embodiment 2) In the tankless toilet of Embodiment 2, FIG.
As shown in the figure, a stage stopcock 1 'connected to a water supply pipe 9'.
In the flow mode, and water is flowed at a flow rate of 100% in the on-off valve similar to that of the first embodiment.

The stage stopcock 1 'is provided with a housing 2' having a water inlet port 20 'and a water outlet port 21' formed in a direction crossing the water inlet port 20 'and a water stop port 1' between the water inlet port 20 'and the water outlet port 21'. A water-stoppable valve mechanism 4 'is a main component. A female thread 20 is provided on the inner periphery of the water inlet port 20 '.
a 'is formed. By screwing this female screw portion 20a 'to the male screw portion on the outer periphery of the water supply pipe 9' (see FIG. 7), the stage water stopcock 1 'is attached to the water supply pipe 9' (see FIG. 17).

In the housing 2 ', the water inlet port 2
A valve chamber 25 'is formed between the water outlet port 0' and the water outlet port 21 '. A cylindrical portion 24 'having a through hole 23' is formed coaxially on the opposite side of the water inlet port 20 'in the housing 2'. The valve mechanism 4 'is provided in the valve chamber 25' and has a spherically rolling valve element 40 'having a hollow chamber 40a'. The valve body 40 'is held by a valve holder 26' of a valve chamber 25 'so as to be rotatable about an axis P1' of the water inlet port 20 '.
The valve element 40 ′ includes a first main opening 41 ′ having a large opening area facing the water inlet port 20 ′, a second main opening 42 ′ having the same opening area as the first main opening 41 ′, and a first main opening 42 ′. Opening 4
1 'and a sub-opening 43' having an opening area smaller than the second main opening 42 '. The first main opening 41 ′, the second main opening 42 ′, and the sub opening 43 ′ penetrate along the radial direction of the valve body 40 ′ and intersect with each other to form the hollow chamber 40 a ′.
Is in communication with Even if the valve body 40 'rotates around the axis P1', the first main opening 41 'always faces the water inlet port 20.

The housing 2 'is provided with an operation section 5' operated to open and close the valve element 40 '. The operation unit 5 ′ includes a rotation shaft 50 ′ rotatably held in the through hole 23 ′ of the housing 2 ′ around the axis P1 ′ of the water inlet port 20 ′, and an operation knob 52 that is rotated by a user. And an urging spring 54 'functioning as urging means. An O-ring 51 'is interposed between the rotating shaft 50' and the inner wall surface of the through hole 23 'to prevent water leakage between the rotating shaft 50' and the housing 2 '.

The operation knob 52 'has a ring portion 52a' provided substantially coaxially with the housing 2 'and a ring portion 52a.
a ′ and projecting inward of the cylindrical portion 24 ′ of the housing 2.
And a contact wall portion 52c 'that comes into contact with the shaft end face. Also,
As shown in FIG. 9, a ring 52a 'of the operation knob 52'.
Is provided with a handle portion 52d 'in consideration of operability. The handle portion 52d 'protrudes outward in the radial direction of the operation knob 52'.

As shown in FIG. 10, on the surface 52e 'of the operation knob 52', the word "open" indicating the use of the stage stopcock 1 'in the open mode, and the closing of the stage stopcock 1'. The letters "closed" indicating use in the mode are displayed, and the letters "flow" indicating use in the flow mode of the step stopcock 1 'are displayed. The open mode means that the flow rate of water discharged from the water outlet port 21 'of the step stopcock 1' is set to 100%. The closed mode means that the flow rate of water discharged from the water outlet port 21 'is set to 0%. The flow mode means an intermediate flow rate (for example, 2 to 5%) of the flow rate of water discharged from the water discharge port 21 'of 100%.

As shown in FIG. 8, the mounting portion 50k 'at the tip of the rotary shaft 50' is fitted and mounted in the hole of the valve body 40 ', and both rotate integrally. A screw hole 50r 'is formed in the shaft end surface of the rotating shaft 50'. Operation knob 5
A mounting screw 56 ′ is inserted into the through hole of the contact wall portion 52 c ′ of 2 ′, and the male screw at the tip of the mounting screw 56 ′ is screwed into the screw hole 50
By attaching it to r ', the operation knob 52' is rotatably held with respect to the housing 2 'of the water stopcock 1'.

The biasing spring 54 'is interposed between the seat plate 57' of the mounting screw 56 'and the contact wall 52c' of the operation knob 52 '. As a result, the urging spring 54 'is operated with the operation knob 5
2 ′ is urged toward the housing 2 ′, that is, in the direction of arrow X1 ′. When a force in the direction of the arrow X2 'acts on the operation knob 52', the biasing spring 54 'is elastically contracted, and the operation knob 52' can retreat in the direction away from the housing 2 ', that is, in the direction of the arrow X2'.

As shown in FIG. 8, an engaged portion 58 'is formed in a portion of the housing 2' facing the back surface 52f 'of the operation knob 52'. As shown in FIG. 9, a first engaging portion 6 is provided on the back surface 52f 'of the operation knob 52'.
The 1 ', the second engaging portion 62', and the third engaging portion 63 'are recessed at predetermined intervals along the circumferential direction of the operation knob 52'. The first engagement portion 61 'is used in the open mode of the step stopcock 1'. The second engaging portion 62 'is used in the closed mode of the step stopcock 1'. The third engagement portion 63 'is used in the flow mode of the step stopcock 1'.

As shown in FIGS. 11 and 12, the engaged portion 58 'formed on the housing 2' is convex and has a gentle arc-shaped convex surface 58c '. On the other hand, the first engaging portion 61 'has a concave shape and is formed by a gentle arc-shaped concave surface 61c'. As shown in FIG. 11, the user moves the operation knob 52 'in the circumferential direction, that is, the arrow S.
When rotated in the 1 'direction, the first engaging portion 61' is removably engaged with the engaged portion 58 '. In this state, the urging spring 54 urges the operation knob 52 'in the direction of the arrow X1', so that the engagement state between the first engaging portion 61 'and the engaged portion 58' is favorably maintained. You.

As shown in FIG. 12, the user operates the operation dial 5.
When the rotating operation of 2 'is further performed, the first engaging portion 61' is disengaged from the engaged portion 58 'and the engagement is released. In this state, the biasing spring 54 'is elastically contracted, and the operation knob 52' can retreat in the direction away from the housing 2 ', that is, in the direction of the arrow X2', so that the first engagement portion 61 'and the engaged portion 58'. Is disengaged satisfactorily.

Although not shown, the second engaging portion 62 'and the third engaging portion 63' have the same structure as the first engaging portion 61 '. Therefore, when the operation knob 52 'is rotated in the closed mode, as shown in FIG.
The engaging portion 62 'is detachably engaged with the engaged portion 58'.
In the flow mode, as shown in FIG. 16, the third engaging portion 63 'is detachably engaged with the engaged portion 58'.

As shown in FIG. 17, the toilet body 7 ′ connected to the water supply pipe 9 ′ through the step stop cock 1 ′ is
0 ′, and a toilet seat 71 ′ and a toilet lid 72 ′ that are swingably provided above the toilet bowl 70 ′. The toilet body 7 'constitutes a tankless toilet having no toilet washing tank. Although not shown, the toilet body 7 'is also provided with the same rim on-off valve and jet on-off valve as in the first embodiment.

In such a tankless toilet, when freezing of the water supply pipe 9 'or the like is expected in cold weather, the user rotates the operation section 5' of the step stopcock 1 'to operate the operation knob 52'. Is switched to the flow mode. In this flow mode, as shown in FIG. 16, the third engaging portion 63 'is engaged with the engaged portion 58' in the step stopcock 1 '. In this state, as shown in FIG. 15, the valve element 40 'rotates around the axis P1', and the sub-opening 43 'faces the water discharge port 21'. Note that the second main opening 42 'is not shown in FIG. 15 because it faces the near side of the paper surface of FIG. In this flow mode, the water inlet port 20 ', the sub-opening 43' and the water outlet port 21 'communicate with each other, so that the water supply pipe 9'
Is discharged from the water outlet port 21 'through the water inlet port 20' and the sub-opening 43 'of the valve body 40'.
Therefore, a small amount of water sent from the water supply pipe 9 'is continuously and constantly discharged. At this time, the opening of the on-off valve mounted on the toilet body 7 'is maintained at 100%. Thus, in this flow mode, freezing of water on the upstream side of the toilet body 7 'can be prevented. Therefore, the tankless toilet of the second embodiment can also provide the same effects as those of the first embodiment.

When the toilet body 7 'is used during the execution of the flow mode, a large amount of water needs to be supplied to the toilet body 7'. The knob 52 'is rotated to release the flow mode and return to the open mode. When the mode is returned to the open mode in this manner, water can be flushed into the toilet main body 7 'by a switch operation by the user, and the excrement in the toilet main body 7' can be removed by flushing with water.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a tankless toilet according to a first embodiment.

FIG. 2 is a perspective view of a main part of the tankless toilet according to the first embodiment.

FIG. 3 is a plan view of a main part of the tankless toilet according to the first embodiment.

FIG. 4 is a rear view of a main part of the tankless toilet according to the first embodiment.

5A is a cross-sectional view of an on-off valve in a closed state, FIG. 5B is a cross-sectional view of an on-off valve in an open state, and FIG.
FIG. 3 is a sectional view of the on-off valve in the flow mode.

FIG. 6 is a side view of the toilet flushing device according to the first embodiment.

FIG. 7 is a front view of the toilet bowl cleaning apparatus according to the first embodiment.

FIG. 8 is a cross-sectional view of the step stopcock showing a state in which the flow rate of water discharged from the water discharge port is 0% according to the second embodiment.

FIG. 9 is an end view of the operation knob of the step stopcock in the state of FIG. 8 according to the second embodiment.

FIG. 10 is an end view of an operation knob according to the second embodiment.

FIG. 11 is a sectional view of a main part of a stage stopcock according to the second embodiment.

FIG. 12 is a sectional view of a main part of a stage stopcock according to the second embodiment.

FIG. 13 is a cross-sectional view of the step stopcock according to the second embodiment, showing a state in which the flow rate of water discharged from the water outlet port is 100%.

FIG. 14 is an end view of the operation knob of the step stopcock in the state of FIG. 13 according to the second embodiment.

FIG. 15 is a cross-sectional view of the step stopcock showing a flow mode state according to the second embodiment.

FIG. 16 is an end view of the operation knob of the step stopcock in the state of FIG. 15 according to the second embodiment.

FIG. 17 is a perspective view of the tankless toilet according to the second embodiment.

[Explanation of symbols]

1, 7 "... toilet body 9, 9 '... water supply pipe 21, 8', 2, 23, 3 ... water supply path (21, 8 '... flexible hose, 2 ... branching device, 23 ... conduit, 3 ... toilet flushing device 22, 1 ', 4R, 4J, 4R ", 4J" ... flow rate switching means (22: water stopcock, 1': step water stopcock, 4R, 4J, 4
R ", 4J" ... open / close valve) 41 ... valve housing 42 ... water inlet port 18, 19 ... flow path (18 ... jet conduit, 19 ... rim conduit) 43 ... water outlet port 47 ... shaft 8 ... cam device 85 ... first 1 cam 86 ... second cam 71 ... motor 74 ... manual shaft

Continued on the front page (72) Inventor Hideya Koike 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Kenichi Ito 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation ( 72) Inventor Yasuhiro Shirai 5-1-1 Koie Honcho, Tokoname City, Aichi Prefecture Inax Co., Ltd. (72) Inventor Yoshitaka Mizutani 5-1-1 Koie Honcho, Tokoname City, Aichi Prefecture Inax Co., Ltd. (72) Inventor Ito Jun 5-1-1 Koiehonmachi, Tokoname-shi, Aichi F-term in Inax Co., Ltd. (Reference) 2D039 AC04 AD01 CB01 DB01 EA01 FD01

Claims (7)

[Claims] 1. A method for supplying water to a flush toilet which supplies water supplied from a water supply pipe to a toilet body of the flush toilet via a water supply passage, wherein a flow rate of water can be switched stepwise to the water supply passage. A method of supplying water to a flush-type toilet, comprising providing a flow rate switching means, and performing a flow mode in which the flow rate switching means causes a flow of water at a flow rate capable of preventing freezing of water at an upstream side of the toilet body. The flow rate switching means comprises a water stopcock capable of continuously adjusting the flow rate of water flowing in the water supply passage, and an on-off valve for opening and closing the water supply passage downstream of the water stopcock. The stopcock is 1
The method for supplying water to a flush toilet according to claim 1, wherein water is flowed at a flow rate of 00%, and the flow mode is performed by opening the on-off valve. 3. An on-off valve having a valve housing formed with an inlet port through which water is supplied in communication with a water supply pipe and an outlet port capable of supplying water to a flow path of a toilet body, and protruding from the valve housing. And a shaft movably provided in the valve housing for opening and closing communication between the water inlet port and the water outlet port, the shaft being movable by a cam. Item 2. The method for supplying water to a flush toilet according to Item 2. 4. The method for supplying water to a flush toilet according to claim 3, wherein the cam is driven by a motor. 5. The method for supplying water to a flush toilet according to claim 3, wherein the cam can be driven manually. 6. A flow stop means for controlling a flow rate of water flowing in a water supply passage in a stepwise manner, and an on-off valve for opening and closing the water supply passage on a downstream side of the step water stop means. And the flow stop mode is performed with the stage stopcock, and 100%
2. The method for supplying water to a flush toilet according to claim 1, wherein water is allowed to flow at an opening degree. 7. The flush toilet according to claim 1, wherein the flush toilet is a tankless toilet having no toilet flush tank.
The method for supplying water to a flush toilet according to 3, 4, 5, or 6.