Flow path switching valve device

Abstract

To provide a downsized flow passage switching valve device.SOLUTION: A flow passage switching valve device according to an embodiment is provided upstream of a plurality of water discharge parts in which water supplied from a water supply source is discharged, and switches between flow passages for supplying water to flow passages for the respective water discharge parts. The flow passage switching valve device comprises: a fixed valve element in which an inflow port, and a plurality of outflow ports are formed; a movable valve element for switching between opening and closing states of the plurality of outflow ports; a movable shaft part fitted with the movable valve element; a driving part for rotating the movable shaft part; a cover member housing the movable valve element, and forming an internal flow passage into which water flows from the inflow port; and a limiting part provided in the internal flow passage, and for limiting the rotation range of the movable shaft part.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The disclosed embodiments relate to a flow path switching valve device.

Background Art

[0002] Conventionally, there is known a flow path switching valve device that switches a flow path for supplying water to flow paths to a plurality of water discharge parts by rotating a movable valve body (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a flow path switching valve device, a abutting structure for restricting the rotation range of a movable valve body is provided on a movable shaft portion to which the movable valve body is attached.

[0005] However, due to the provision of the abutting structure, the distance between a motor that rotates the movable shaft portion and a cover member that houses the movable valve body becomes long, and there is a possibility that it becomes difficult to miniaturize the flow path switching valve device.

[0006] One aspect of the embodiment aims to miniaturize the flow path switching valve device.

Means for Solving the Problems

[0007] A flow path switching valve device according to one embodiment is installed upstream of a plurality of discharge outlets from which water supplied from a water source is discharged, and switches the flow path that supplies water to each discharge outlet. The flow path switching valve device comprises a fixed valve body having an inlet and a plurality of outlets, a movable valve body that switches the open and closed state of the plurality of outlets, a movable shaft to which the movable valve body is attached, a drive unit that rotates the movable shaft unit, a cover member that houses the movable valve body and forms an internal flow path through which water flows in from the inlet, and a limiting unit provided in the internal flow path that limits the range of rotation of the movable shaft unit.

[0008] As a result, the flow path switching valve device can reduce the amount of protrusion of the movable shaft and the drive unit from the cover member in the axial direction of the movable shaft, compared to when the limiting portion is provided on the outside of the cover member. In other words, by providing the limiting portion within the flow path, the length of the flow path switching valve device in the axial direction of the movable shaft can be reduced, and the device can be made more compact.

[0009] The flow path switching valve device includes a biasing member supported by the movable shaft portion, which biases the movable valve body toward the fixed valve body. The limiting portion is provided on the drive portion side of the biasing member.

[0010] As a result, the flow path switching valve device can be provided with a limiting section that has a larger outer diameter than the biasing member. Therefore, the strength of the limiting section of the flow path switching valve device can be increased. The rotational force of the drive unit can be increased, and the opening and closing state of the outlet can be switched quickly by the movable valve body. In addition, the load on the movable shaft can be suppressed when the rotation of the flow path switching valve device is restricted by the limiting section. Furthermore, the distance between the inlet and the multiple outlets and the limiting section can be increased. Therefore, the flow path switching valve device can prevent the flow of cleaning water flowing in from the inlet and the flow of cleaning water flowing into the multiple outlets from being obstructed by the limiting section.

[0011] The restricting portion includes a protruding portion provided on the movable shaft portion and projecting from the outer peripheral wall of the movable shaft portion, and a stopper provided on the cover member that restricts the rotation of the movable shaft portion by contacting the protruding portion.

[0012] As a result, the flow path switching valve device can improve the strength of the limiting portion by providing a stopper on the cover member.

[0013] Of the ends of the protruding portion, the end opposite to the end that contacts the stopper is formed tangent to the outer peripheral wall of the movable shaft portion.

[0014] This allows the flow path switching valve device to improve the strength of its protruding portion.

[0015] The flow path switching valve device comprises an inner circumferential wall of the cover member that forms an insertion hole into which the movable shaft portion is inserted, and a plurality of ring-shaped sealing members provided between the cover member and the movable shaft portion.

[0016] This makes it possible to suppress water leakage from the internal flow path of the cover member.

[0017] The multiple sealing members include a first sealing member and a second sealing member provided on the drive unit side of the first sealing member. The first sealing member has a smaller overlap than the second sealing member.

[0018] As a result, the flow path switching valve device can suppress water leakage from the cover member and reduce the load torque of the drive unit that rotates the movable valve body. [Effects of the Invention]

[0019] According to one embodiment, the flow path switching valve device can be miniaturized. [Brief explanation of the drawing]

[0020] [Figure 1]FIG. 1 is an overall configuration diagram showing a flushing toilet provided with a flow path switching valve device according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the valve unit. [Figure 3] FIG. 3 is a front view of the valve unit as viewed from the drive unit side. [Figure 4] FIG. 4 is a view showing a part of the cross section taken along line IV-IV of FIG. 3. [Figure 5] FIG. 5 is a front view of the fixed valve body as viewed from the drive unit side. [Figure 6] FIG. 6 is a front view of the fixed valve body and the movable valve body as viewed from the drive unit side. [Figure 7] FIG. 7 is a view showing the positional relationship between the movable valve body and the fixed valve body when the movable valve body is in the first rotation position. [Figure 8] FIG. 8 is a view showing the positional relationship between the movable valve body and the fixed valve body when the movable valve body is in the second rotation position. [Figure 9] FIG. 9 is a view showing a part of the valve unit corresponding to the cross section taken along line IX-IX of FIG. 4.

Mode for Carrying Out the Invention

[0021] Hereinafter, embodiments of the flow path switching valve device disclosed in the present application will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited by the embodiments shown below. Also, the drawings are schematic, and it should be noted that the dimensional relationships between elements, the ratios of the elements, etc. may be different from reality. There may also be parts where the dimensional relationships and ratios between the drawings are different from each other.

[0022] <Configuration of the Flushing Toilet> First, the configuration of the flushing toilet 100 provided with the flow path switching valve device 660 will be described with reference to FIG. 1. FIG. 1 is an overall configuration diagram showing a flushing toilet 100 provided with a flow path switching valve device 660 according to an embodiment.

[0023] As shown in Figure 1, the flush toilet 100 comprises, for example, a toilet bowl body 200 placed on the floor of a toilet room, and a flush water supply device 1 positioned behind the toilet bowl body 200 and supplying flush water (water) to the toilet bowl body 200.

[0024] The toilet bowl body 200 comprises a bowl portion 210 for receiving waste and a drain trap pipe 220 extending rearward from the bottom of the bowl portion 210. The bowl portion 210 has a rim spout 212 (spout) for rim water discharge and a jet spout 214 for jet water discharge. The rim spout 212 is formed at the upper rear of the bowl portion 210 and discharges flushing water along the upper edge of the bowl portion 210.

[0025] The jet outlet 214 is formed at the bottom of the bowl section 210 and discharges cleaning water towards the drain trap pipe 220. The discharge of cleaning water from the jet outlet 214 rapidly fills the drain trap pipe 220 with cleaning water, allowing the siphon effect to be generated early. The drain trap pipe 220 forms a water seal and is in communication with the sewer piping (not shown).

[0026] The cleaning water supply device 1 includes a valve unit 600 controlled by a control unit (not shown), a tank 800 (discharge section) located downstream of the valve unit 600 for storing cleaning water, and a pressure pump 900 located downstream within the tank 800 for pressurizing the cleaning water.

[0027] A water supply channel 310, which supplies cleaning water from a water source (not shown), is connected to the upstream side of the valve unit 600. Furthermore, a rim-side water supply channel 320 for supplying cleaning water to the rim outlet 212 and a tank-side water supply channel 330 for supplying cleaning water to the tank 800 are connected to the downstream side of the valve unit 600. In other words, the valve unit 600 is installed upstream of the rim outlet 212, from which water supplied from the water source is discharged, and upstream of the tank 800. Note that upstream and downstream are defined in relation to the direction in which the cleaning water flows.

[0028] The valve unit 600 includes a constant flow valve 620, a diaphragm-type water supply valve 640 located downstream of the constant flow valve 620, a flow path switching valve device 660 located downstream of the water supply valve 640, and a vacuum breaker 680 located downstream of the flow path switching valve device 660.

[0029] The constant flow valve 620 maintains a constant flow rate of cleaning water flowing from the water supply channel 310 into the constant flow valve 620 and moving downstream. The water supply valve 640 is configured, for example, to include a diaphragm, and its opening and closing switches between discharging and shutting off cleaning water at the rim outlet 212 and the jet outlet 214.

[0030] The flow path switching valve device 660 switches the destination of the flushing water supply from the water source to, for example, the rim outlet 212 of the toilet bowl body 200 and the tank 800. In other words, the flow path switching valve device 660 switches the flow path that supplies flushing water to the rim-side water supply channel 320 or the tank-side water supply channel 330.

[0031] The vacuum breaker 680 prevents backflow of cleaning water. In the event that cleaning water overflows into the water receiving section 686 due to a malfunction of the valve body 683, the cleaning water that overflows into the water receiving section 686 is collected by the water receiving section 686 and then discharged to the tank 800, for example, via the discharge section 687.

[0032] Tank 800 stores the flushing water supplied to the jet outlet 214 of the toilet bowl body 200. A pump-side water supply channel 340 is connected to the bottom of tank 800, and a pressure pump 900 is connected to the downstream end of the pump-side water supply channel 340.

[0033] Furthermore, an overflow channel 342 is connected to the top of the tank 800. The overflow channel 342 allows flushing water to flow out to the toilet bowl body 200 when, for example, flushing water is supplied to the tank 800 at a level above the specified water level WL. Specifically, the overflow channel 342 allows flushing water that has reached a level above the specified water level WL to flow out to the jet outlet 214 of the toilet bowl body 200 via the jet-side water supply channel 350, without passing through the pressurizing pump 900.

[0034] The pressurizing pump 900 is connected to the jet outlet 214 by the jet-side water supply channel 350, and pressurizes the cleaning water stored in the tank 800 and supplies it to the jet outlet 214 via the jet-side water supply channel 350.

[0035] <Configuration of the flow path switching valve device> Next, the specific configuration of the flow path switching valve device 660 according to the embodiment will be described with reference to Figures 2 to 10. Figure 2 is a perspective view of the valve unit 600. Figure 3 is a front view of the valve unit 600 as seen from the drive unit 13 side. Figure 4 is a diagram showing a part of the IV-IV cross section in Figure 3. Figure 5 is a front view of the fixed valve body 10 as seen from the drive unit 13 side. Figure 6 is a front view of the fixed valve body 10 and the movable valve body 11 as seen from the drive unit 13 side. Figure 7 is a diagram showing the positional relationship between the movable valve body 11 and the fixed valve body 10 when the movable valve body 11 is in the first rotation position. Figure 8 is a diagram showing the positional relationship between the movable valve body 11 and the fixed valve body 10 when the movable valve body 11 is in the second rotation position. Figure 9 is a diagram showing a part of the valve unit 600 corresponding to the IX-IX cross section in Figure 4.

[0036] The flow path switching valve device 660 is attached to the main body portion 600A of the valve unit 600. The flow path switching valve device 660 comprises a fixed valve body 10, a movable valve body 11, a movable shaft portion 12, a drive portion 13, a biasing member 14, a cover member 15, and a limiting portion 16.

[0037] The fixed valve body 10 is provided in a housing space 600B formed in the main body portion 600A of the valve unit 600. The housing space 600B is formed in a concave shape. The main body portion 600A of the valve unit 600 is formed so that the water supply passage 310, the rim-side water supply passage 320, and the tank-side water supply passage 330 each communicate with the housing space 600B. Three communication openings are formed on the bottom surface of the main body portion 600A of the valve unit 600 that form the housing space 600B, through which the water supply passage 310, the rim-side water supply passage 320, and the tank-side water supply passage 330 communicate.

[0038] The fixed valve body 10 is provided on the bottom surface of the housing space 600B so as to face each other with a sealing member 17 in between. The fixed valve body 10 is plate-shaped. The fixed valve body 10 is formed in a substantially circular shape. As shown in Figure 5, the fixed valve body 10 has an inlet 10a and a plurality of outlets 10b, 10c. The inlet 10a and the plurality of outlets 10b, 10c are arranged in the circumferential direction of the fixed valve body 10. The inlet 10a communicates with the water supply channel 310 (see Figure 1). The inlet 10a is formed in a fan shape, for example, that spreads from the center side of the fixed valve body 10 toward the outer circumference.

[0039] The multiple outlets 10b and 10c include a first outlet 10b and a second outlet 10c. The first outlet 10b communicates with the rim-side water supply channel 320 (see Figure 1). The first outlet 10b is formed in a fan shape, for example, that spreads outwards from the center of the fixed valve body 10 towards the outer circumference. The second outlet 10c communicates with the tank-side water supply channel 330 (see Figure 1). The second outlet 10c is formed in a fan shape, for example, that spreads outwards from the center of the fixed valve body 10 towards the outer circumference.

[0040] The sealing member 17, which is provided between the fixed valve body 10 and the bottom surface of the housing space 600B, is provided so as to partition the water supply channel 310, the rim-side water supply channel 320, and the tank-side water supply channel 330, respectively.

[0041] The movable valve body 11 is positioned to contact the fixed valve body 10 on the side opposite to the bottom of the housing space 600B. An insertion hole 11a is formed in the movable valve body 11. The movable shaft portion 12 is inserted into the insertion hole 11a. The movable valve body 11 and the movable shaft portion 12 are connected, for example, by one or more splines. The movable valve body 11 rotates together with the movable shaft portion 12 as the movable shaft portion 12 rotates. As shown in Figure 6, the movable valve body 11 is formed in a fan shape, for example, that widens from the insertion hole 11a side toward the outer circumference. By rotating, the movable valve body 11 switches the open and closed states of the first outlet 10b and the second outlet 10c. As shown in Figure 7, the movable valve body 11 is configured to open the first outlet 10b and close the second outlet 10c in the first rotation position. Furthermore, the movable valve body 11 is configured to close the first outlet 10b and open the second outlet 10c in the second rotation position shown in Figure 8.

[0042] A movable valve body 11 is attached to the movable shaft portion 12. The movable shaft portion 12 rotatably supports the movable valve body 11. One first end of the movable shaft portion 12 in the axial direction, specifically the first end on the main body portion 600A side of the valve unit 600, is inserted into the insertion hole 11a of the movable valve body 11. The other second end of the movable shaft portion 12 in the axial direction is inserted into the insertion hole 22a formed in the support portion 22 of the cover member 15. Multiple sealing members 18 are provided between the support portion 22 and the movable shaft portion 12. Specifically, multiple sealing members 18 are provided between the inner circumferential wall of the support portion 22 of the cover member 15 that forms the insertion hole 22a and the movable shaft portion 12.

[0043] The multiple sealing members 18 are ring-shaped. The multiple sealing members 18 include a first sealing member 18a and a second sealing member 18b. The first sealing member 18a and the second sealing member 18b are provided side by side in the axial direction of the movable shaft portion 12. The second sealing member 18b is provided closer to the drive portion 13 than the first sealing member 18a. The first sealing member 18a is housed in a first sealing groove 12a formed in the outer peripheral wall of the movable shaft portion 12. The first sealing groove 12a is formed around the entire circumference of the outer peripheral wall of the movable shaft portion 12 along the circumferential direction. The first sealing member 18a is an O-ring. The second sealing member 18b is housed in a second sealing groove 12b formed in the outer peripheral wall of the movable shaft portion 12. The second sealing groove 12b is formed around the entire circumference of the outer peripheral wall of the movable shaft portion 12 along the circumferential direction. The second sealing member 18b is an O-ring. The first sealing member 18a has a smaller overlap than the second sealing member 18b. For example, the outer diameter of the first sealing member 18a is larger than the outer diameter of the second sealing member 18b. The overlap between the first sealing member 18a and the second sealing member 18b may be adjusted by the depths of the first sealing groove 12a and the second sealing groove 12b. For example, the depth of the first sealing groove 12a may be formed to be deeper than the depth of the second sealing groove 12b.

[0044] The first sealing member 18a seals the cleaning water flowing into the cover member 15. Grease is stored between the first sealing member 18a and the second sealing member 18b to facilitate the rotation of the movable shaft 12.

[0045] A recess 12c is formed on the second end side of the movable shaft portion 12, extending axially from the tip. The pivot shaft 13a of the drive unit 13 is inserted into the recess 12c. The recess 12c is formed such that the shape of the cross section perpendicular to the axial direction of the movable shaft portion 12 is, for example, rectangular or oval. The shape of the tip of the pivot shaft 13a of the drive unit 13 is formed to match the shape of the recess 12c. The movable shaft portion 12 rotates together with the pivot shaft 13a of the drive unit 13 as the pivot shaft 13a of the drive unit 13 rotates. The movable shaft portion 12 and the pivot shaft 13a of the drive unit 13 may be connected, for example, by a spline.

[0046] The movable shaft portion 12 is equipped with a restricting portion 12d. The restricting portion 12d is housed in the housing portion 20 of the cover member 15. The restricting portion 12d protrudes radially from the outer peripheral wall of the movable shaft portion 12. The diameter of the restricting portion 12d is larger than the diameter of the insertion hole 22a formed in the support portion 22 of the cover member 15. The restricting portion 12d abuts against the tip of the support portion 22 of the cover member 15. The restricting portion 12d restricts the movement of the movable shaft portion 12 toward the drive portion 13.

[0047] The drive unit 13 rotates the movable shaft 12. The drive unit 13 is, for example, a stepping motor. The pivot shaft 13a of the drive unit 13 is inserted into the recess 12c of the movable shaft 12.

[0048] The biasing member 14 is housed in the housing portion 20 of the cover member 15. The biasing member 14 is, for example, a compression coil spring. The biasing member 14 is provided between the restricting portion 12d of the movable shaft portion 12 and the movable valve body 11. The movable shaft portion 12 is inserted into the biasing member 14. The biasing member 14 is supported by the movable shaft portion 12. One end of the biasing member 14 abuts against the restricting portion 12d of the movable shaft portion 12. The other end of the biasing member 14 abuts against the movable valve body 11. The biasing member 14 biases the movable valve body 11 toward the fixed valve body 10.

[0049] The cover member 15 is attached to the main body 600A of the valve unit 600. The cover member 15 comprises a housing portion 20 and a flange portion 21. The housing portion 20 is formed, for example, in a bowl shape. The opening side of the housing portion 20 is inserted into the housing space 600B formed in the main body 600A of the valve unit 600. The end of the housing portion 20 on the opening side abuts against the fixed valve body 10. The cover member 15 presses the fixed valve body 10 against the bottom surface side forming the housing space 600B of the valve unit 600, and holds the fixed valve body 10.

[0050] The housing section 20 forms a flow path 20a (internal flow path) through which cleaning water supplied from the water supply channel 310 flows. The flow path 20a is provided with a movable valve body 11, a biasing member 14, a part of the movable shaft section 12 (for example, a regulating section 12d), and a limiting section 16. Cleaning water flows into the flow path 20a from the water supply channel 310 through the inlet 10a of the fixed valve body 10. The cleaning water in the flow path 20a is discharged from either the first outlet 10b or the second outlet 10c, depending on the rotational position of the movable valve body 11.

[0051] A support portion 22 is formed at the bottom of the housing portion 20. The support portion 22 is formed along the axial direction of the movable shaft portion 12. The support portion 22 has an insertion hole 22a into which the movable shaft portion 12 and the pivot shaft 13a of the drive portion 13 are inserted.

[0052] A sealing member 23 is provided between the outer periphery wall of the housing section 20 and the side wall forming the housing space 600B. The sealing member 23 is an O-ring.

[0053] The flange portion 21 protrudes from the outer circumferential wall of the housing portion 20. The cover member 15 is attached to the main body portion 600A of the valve unit 600 by screws 25.

[0054] The limiting portion 16 is provided in the flow path 20a of the cover member 15. The limiting portion 16 is provided on the drive unit 13 side of the biasing member 14. The limiting portion 16 restricts the rotation range of the movable shaft portion 12. As shown in Figure 9, the limiting portion 16 includes a protruding portion 30 and a stopper 31.

[0055] The protruding portion 30 is provided on the movable shaft portion 12. Specifically, the protruding portion 30 is formed to protrude from the regulating portion 12d of the movable shaft portion 12 and from the outer peripheral wall of the movable shaft portion 12. When the movable shaft portion 12 rotates, one end 30a in the circumferential direction of the protruding portion 30 abuts against the stopper 31. That is, the protruding portion 30 has a contact surface at one end 30a in the circumferential direction of the protruding portion 30.

[0056] Of the circumferential ends of the protruding portion 30, the end 30b opposite to the end 30a on which the contact surface is formed is formed tangent to the outer peripheral wall of the movable shaft portion 12. Specifically, of the circumferential ends of the protruding portion 30, the end 30b opposite to the end 30a on which the contact surface is formed is formed tangent to the outer peripheral wall of the restricting portion 12d of the movable shaft portion 12.

[0057] Furthermore, the end 30b opposite to the end 30a where the contact surface is formed is formed parallel to the end 30a where the contact surface is formed. For example, with respect to a virtual plane P that includes the rotation axis L of the movable shaft portion 12 and is parallel to the end 30a, the end 30b of the projection portion 30 is provided on the opposite side from the end 30a.

[0058] The stopper 31 is provided on the cover member 15. The stopper 31 is configured to protrude into the flow path 20a from the inner wall of the housing portion 20 of the cover member 15. When the protruding portion 30 of the stopper 31 comes into contact with the movable shaft portion 12, the stopper 31 restricts the rotation of the movable shaft portion 12. For example, the stopper 31 restricts the rotation of the movable shaft portion 12 when the movable shaft portion 12 is rotated so that the movable valve body 11 closes the second outlet 10c, that is, when the movable valve body 11 is rotated to the first rotation position.

[0059] When the flow path switching valve device 660 is supplying cleaning water to the rim-side water supply channel 320, the movable valve body 11 is set to the first rotation position. This connects the inlet 10a and the first outlet 10b, allowing cleaning water to flow from the water supply channel 310 to the rim-side water supply channel 320, and the cleaning water to be discharged from the rim outlet 212. The rotation of the movable valve body 11 is restricted by the limiting part 16. Therefore, when the flow path switching valve device 660 is discharging cleaning water from the rim outlet 212, the movable valve body 11 can reliably close the second outlet 10c, preventing cleaning water from flowing from the second outlet 10c into the tank-side water supply channel 330. Consequently, the cleaning water supply device 1 can suppress a decrease in the flow rate of cleaning water per unit time discharged from the rim outlet 212, thereby improving the efficiency of waste discharge.

[0060] When flowing cleaning water into the tank-side water supply channel 330, the flow path switching valve device 660 sets the position of the movable valve body 11 to the second rotation position. This connects the inlet 10a and the second outlet 10c, allowing cleaning water to flow from the water supply channel 310 to the tank-side water supply channel 330, and the cleaning water to be discharged into the tank 800.

[0061] <Effects> The flow path switching valve device 660 is located upstream of the rim outlet 212 from which cleaning water supplied from the water source is discharged, and the tank 800 (multiple water outlets), and switches the flow paths that supply cleaning water to the rim-side water supply channel 320 to the rim outlet 212 and the tank-side water supply channel 330 to the tank 800. The flow path switching valve device 660 comprises a fixed valve body 10, a movable valve body 11, a movable shaft 12, a drive unit 13, a cover member 15, and a limiting unit 16. The fixed valve body 10 has an inlet 10a and multiple outlets 10b, 10c. The movable valve body 11 switches the open and closed states of the multiple outlets 10b, 10c. The movable shaft 12 is to which the movable valve body 11 is attached. The drive unit 13 rotates the movable shaft 12. The cover member 15 houses the movable valve body 11 and forms a flow path 20a (internal flow path) through which cleaning water flows in from the inlet 10a. The limiting portion 16 is provided in the flow path 20a and limits the range of rotation of the movable shaft portion 12.

[0062] As a result, the flow path switching valve device 660 can reduce the amount of protrusion of the movable shaft 12 and the drive unit 13 from the cover member 15 in the axial direction of the movable shaft 12, compared to when the limiting portion is provided on the outside of the cover member. In other words, by providing the limiting portion 16 within the flow path 20a, the flow path switching valve device 660 can be made smaller by reducing the length of the movable shaft 12 in the axial direction.

[0063] The flow path switching valve device 660 includes a biasing member 14. The biasing member 14 is supported by the movable shaft portion 12 and biases the movable valve body 11 toward the fixed valve body 10. The limiting portion 16 is provided on the drive portion 13 side of the biasing member 14.

[0064] As a result, the flow path switching valve device 660 can be provided with a limiting portion 16 that has a larger outer diameter than the biasing member 14. Therefore, the strength of the limiting portion 16 can be increased in the flow path switching valve device 660. The rotational force of the drive unit 13 can be increased in the flow path switching valve device 660, and the opening and closing state of the outlets 10b and 10c by the movable valve body 11 can be switched quickly. In addition, the flow path switching valve device 660 can suppress the load on the movable shaft 12 when rotation is restricted by the limiting portion 16. Furthermore, the flow path switching valve device 660 can increase the distance between the inlet 10a and the multiple outlets 10b and 10c and the limiting portion 16. Therefore, the flow path switching valve device 660 can suppress obstruction of the flow of cleaning water flowing in from the inlet 10a and the flow of cleaning water flowing into the multiple outlets 10b and 10c by the limiting portion 16.

[0065] The limiting portion 16 comprises a protruding portion 30 and a stopper 31. The protruding portion 30 is provided on the movable shaft portion 12 and protrudes along the radial direction of the movable shaft portion 12. The stopper 31 is provided on the cover member 15 and restricts the rotation of the movable shaft portion 12 by contacting the protruding portion 30.

[0066] As a result, the flow path switching valve device 660 can improve the strength of the limiting portion 16 by providing a stopper 31 on the cover member 15.

[0067] Of the ends of the protruding portion 30, the end 30b opposite to the end 30a that abuts the stopper 31 is formed tangent to the outer peripheral wall of the movable shaft portion 12.

[0068] This allows the flow path switching valve device 660 to improve the strength of the protruding portion 30.

[0069] The flow path switching valve device 660 includes a plurality of ring-shaped sealing members 18. The sealing members 18 are provided between the inner circumferential wall of the cover member 15, which forms the insertion hole 22a into which the movable shaft portion 12 is inserted, and the movable shaft portion 12.

[0070] This makes it possible to suppress water leakage from the flow path 20a of the cover member 15.

[0071] The multiple sealing members 18 include a first sealing member 18a and a second sealing member 18b. The second sealing member 18b is provided on the drive unit 13 side than the first sealing member 18a. The first sealing member 18a has a smaller overlap than the second sealing member 18b.

[0072] As a result, the flow path switching valve device 660 can suppress water leakage from the cover member 15 and reduce the load torque of the drive unit 13 that rotates the movable valve body 11.

[0073] In the modified flow path switching valve device 660, the limiting portion 16 may be provided to restrict the rotation of the movable shaft portion 12 when the movable valve body 11 is rotated to the first rotation position. Alternatively, in the modified flow path switching valve device 660, the limiting portion 16 may be provided to restrict the rotation of the movable shaft portion 12 when the movable valve body 11 is rotated to the first rotation position and the second rotation position.

[0074] Further effects and modifications can be readily derived by those skilled in the art. Therefore, broader aspects of the present invention are not limited to the specific details and representative embodiments expressed and described above. Accordingly, various modifications are possible without departing from the spirit or scope of the overall concept of the invention as defined by the appended claims and their equivalents. [Explanation of Symbols]

[0075] 1. Washing water supply device 10 Fixed valve body 10a Inlet 10b 1st outlet 10c 2nd outlet 11 Movable valve body 12 Movable shaft part 13 Drive unit 14. Biasing member 15 Cover component 16 Restriction section 18 sealing member 18a First sealing member 18b Second sealing member 20 Storage Units 20a Flow channel (internal flow channel) 21 Flange section 22a Insertion hole 30 Protrusion 30a end 30b end 31 Stopper 212 Rim spout (spout section) 310 Water supply channel 320 Rim-side water supply channel 330 Tank-side water supply channel 600 Valve Unit 660 Flow path switching valve device 600A Main Unit 800 Tank (Water Outlet)

Claims

1. A flow path switching valve device is installed upstream of multiple discharge outlets from which water supplied from a water source is discharged, and switches the flow path that supplies water to each discharge outlet. A fixed valve body having an inlet and multiple outlets, A movable valve body that switches the open / closed state of the multiple outlets, The movable shaft portion to which the aforementioned movable valve body is attached, A drive unit that rotates the aforementioned movable shaft portion, A cover member that houses the movable valve body and forms an internal flow path through which water flows in from the inlet, A limiting portion is provided in the internal flow path and limits the rotation range of the movable shaft portion, A biasing member supported on the movable shaft portion and biasing the movable valve body toward the fixed valve body, Equipped with, The limiting portion is provided on the drive unit side of the biasing member, and is a flow path switching valve device.

2. A flow path switching valve device provided upstream of a plurality of discharge outlets from which water supplied from a water source is discharged, which switches the flow path that supplies water to each discharge outlet, A fixed valve body having an inlet and multiple outlets, A movable valve body that switches the open / closed state of the multiple outlets, The movable shaft portion to which the aforementioned movable valve body is attached, A drive unit that rotates the aforementioned movable shaft portion, A cover member that houses the movable valve body and forms an internal flow path through which water flows in from the inlet, A limiting portion is provided in the internal flow path and limits the rotation range of the movable shaft portion. Equipped with, The aforementioned limiting section is A protruding portion is provided on the movable shaft portion and protrudes from the outer circumferential wall of the movable shaft portion, A stopper is provided on the cover member, and the protruding portion abuts against it to restrict the rotation of the movable shaft portion. A flow path switching valve device equipped with the above.

3. The flow path switching valve device according to claim 2, wherein the end of the protruding portion opposite to the end that abuts the stopper is formed tangent to the outer peripheral wall of the movable shaft portion.

4. A flow path switching valve device according to any one of claims 1 to 3, comprising a ring-shaped sealing member provided between the inner circumferential wall of the cover member that forms an insertion hole into which the movable shaft portion is inserted and the movable shaft portion.

5. The plurality of sealing members are, First sealing member and A second seal member provided on the drive unit side of the first seal member and Includes, The flow path switching valve device according to claim 4, wherein the first sealing member has a smaller overlap than the second sealing member.

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