JP3353422B2 - Switching valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to, for example, a household sink attached to a water tap to supply raw water, a shower,
The present invention relates to a switching valve for switching a plurality of liquid flow paths, such as a tap water switching valve used for switching a water path for water purification.

[0002]

2. Description of the Related Art For example, in a water purifier mounted on a tap for general household use, a switching valve is provided between the tap and the water purifier. This switching valve has a water purification passage for guiding tap water to the water purifier, a shower passage for guiding tap water to a shower hole, and a raw water passage for guiding tap water to a raw water outlet.

The water purifier is a device for filling a purifying material such as activated carbon and removing impurities in tap water. The shower hole is a water outlet for spraying tap water in a shower. The raw water outlet is a discharge port for discharging tap water in the same manner as a normal faucet. By the way, as mentioned above, as a switching valve for switching the water channel for the three passages,
It has been proposed in Japanese Patent Application Laid-Open No. 3-204485.

In this apparatus, as shown in FIGS. 10 to 11, a vertically rotating rod-shaped member 8 is provided in a casing 9, a liquid inlet 91 is provided on one surface of the casing 9, and the other end is provided. Outlets 921, 922, 9
23 is provided, and valve balls 93, 94, 95 are provided on the inner peripheral side of the outlets 921, 922, 923. These bulbs 93, 94, 95 are partitioned by partition walls 811, 812, 813, 814 of the rod-shaped member 8 as shown in FIG. In addition, the respective partition walls 811 to 81
4, walls 831, 832, and 833 for scooping up each of the valve balls 93 to 94 are provided by being shifted by 90 ° (FIG. 11).

In this switching valve, when the rod member 8 in the casing 9 is rotated, as shown in FIG. 11, one of the walls 831, 832, and 833 of the rod member 8 causes the corresponding valve balls 93, 94 , 95 up. Then, the corresponding outlets 921 to 923 are formed by pushing up the valve ball.
Is released. In this way, the outlet 92
1 to 923 are controlled to open and close the liquid inlet 9 of the casing 9.
The outlet of the flowing water that has flowed in from 1 is switched (a in FIG. 11,
c, d) or stop the flow to all passages (FIG. 1)
1b). In FIG. 11, the bulbs 93, 94 and 95
, Respectively, are used to open and close passages for water purification, raw water, and shower, respectively.

[0006]

By the way, the outlet 921 described above is used.
923 requires an outlet having a diameter equal to or larger than a predetermined size in order to secure an outflow amount. Therefore, bulbs 93-9
The diameter of 5 must be made large according to the size of the outlet. In addition, the outlets 921 to 923 cannot be opened unless the valve bulbs 93 to 95 are raised above a predetermined height.

[0007] The rod-shaped member accommodates the bulbs 93 to 95 and attaches the bulbs 93 to 95 to the wall portions 831 to 83.
3 has a structure and function of opening and closing. Therefore, one having a large diameter in the vertical direction is required. When the diameter of the rod-shaped member 8 is increased, the space in the casing 9 needs to be increased, and the thickness of the switching valve as a whole from the faucet to the discharge port in the vertical direction increases. If the width from the faucet to the discharge port is large, the distance from the discharge port to the bottom of the sink will be short when the switching valve is attached to the faucet, so that work in the sink (dish washing, etc.) will be extremely difficult. It will be difficult.

The conventional switching valve has a structure in which the rod-shaped member 8 is rotated, and the valve ball is lifted up and down by a wall portion 831, 832, 833 provided on the rod-shaped member 8 to open and close. Therefore, the structure of the rod-shaped member is complicated. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a switching valve which can be reduced in overall thickness, has a simple structure, and can smoothly open and close a valve ball.

[0009]

According to the present invention, there is provided a housing provided on a liquid inflow side, a casing provided with a plurality of liquid flow passages laminated and connected to a lower surface of the housing, and switching the liquid to any one of the above liquid flow passages. Valve, the housing having an opening opening at an inlet of the casing, while the casing communicates between the inlet and the plurality of liquid flow passages. having parallel valve seat plate in the stacking direction between the housing and the casing and having a plurality of valve seats to be and the more
A valve ball is disposed on each of the valve seats, and the switching handle has a rotating arm that rotates along the valve seat plate on the valve seat plate. The above-mentioned valve balls are arranged on the rotation trajectory, and when the switching handle is rotated, the above-mentioned rotating arm comes into contact with at least one valve ball and moves the valve ball laterally. The pivot arm is always in contact with at least one valve ball, and the valve seat on which the valve ball is located is provided.
And the fluid always flows through the valve port of one of the valve seats.
The switching valve is characterized in that the switching valve is configured to output.

[0010] The most noteworthy in the present invention, its in each seat provided with a plurality of valve seat to the valve seat plate
Place a respectively said valve ball, whereas is located the valve ball on the rotating locus of the rotating arm, said rotating arm when rotated the switch handle in contact with at least one valve ball The present invention is configured to open the valve by moving the valve ball in the lateral direction. Further, the rotating arm is always in contact with at least one valve ball, and the valve ball is arranged.
Open the valve seat so that fluid always flows through the valve port of one of the valve seats.
And configured to flow out. That is, the configuration is such that all valve seats are not closed at the same time.

It is preferable that the casing has a holding guide for holding the valve balls so as to be movable and for normally holding the valve balls on the valve seat. As such a holding guide, there is a holding guide having a downward tapered bottom inclined downward toward a valve seat (FIG. 1). As a result, the valve ball is always positioned on the valve seat (when the valve is closed), and when the valve ball is pushed by the turning arm of the switching handle, the valve ball is moved upward along the bottom of the downward taper to open. Give a valve. On the other hand, when the valve ball is no longer pushed, the valve ball can be automatically moved down onto the valve seat again to close the valve.

Further, the turning arm of the switching handle has a contact portion at a central portion of a tip portion thereof for holding a valve ball at a valve opening position, and has a valve on the left and right sides of the contact portion. It is preferable to have a tapered portion for scooping up a ball.
Thus, the valve ball can be gradually and smoothly moved, and can be held at the valve opening position. Further, since the valve ball can be moved gradually and smoothly, the supply or stop of the fluid to the liquid flow passage is not suddenly performed, and the liquid can be gradually supplied and stopped smoothly.

Further, it is preferable that the switching handle has a stopper for holding the switching handle at a desired position. Thereby, the switching handle can be held at a desired liquid supply position. Further, it is preferable to use a member having an elastic force such as a leaf spring for the stopper. Thereby, the rotation stop operation of the switching handle becomes smooth.

Next, as described above, the switching valve may be configured as a tap water switching valve for guiding tap water to a water purifier. In this case, the liquid is water, and the plurality of liquid flow passages are a raw water passage for guiding the water to a raw water outlet, a shower passage for guiding the water to a shower hole, and a water purification nozzle connected to a water purifier. (See Examples). The switching valve of the present invention can be used in factories, experimental devices, etc., in addition to the tap water switching valve for general households.
It can also be used as a switching valve for liquids such as tap water, solvent, and drainage.

[0015]

In the switching valve of the present invention, the fluid is supplied from the housing to the inflow portion in the casing. When the rotating arm is rotated by the switching handle, the rotating arm comes into contact with any one of the valve balls arranged on the plurality of valve seats on the rotation trajectory. Therefore, the rotating arm pushes the valve ball laterally from above the valve seat. Therefore, the valve port of the valve seat is opened, and the liquid flows into the liquid flow passage through which the valve seat is connected.

Further, in the switching valve of the present invention, the casing is laminated and connected to the lower surface of the housing, and a valve seat plate parallel to the laminating direction of the housing and the casing is provided in the casing. Further, the switching handle for moving the valve ball on the valve seat of the valve seat plate has a turning arm that turns in parallel with the valve seat plate.

Therefore, the housing and the casing,
Further, the valve seat plate and the rotating arm in the casing are located in parallel in the vertical direction. Also,
The pivot arm moves in a direction parallel to the stacking direction, whereby the valve ball on the valve seat also moves in the parallel direction. Therefore, the switching valve has a flat shape as a whole, and has a small thickness in the vertical direction. In addition, the opening and closing of the valve port in the valve seat is performed by pushing the valve ball in the lateral direction by the rotating arm, so that the opening and closing structure of the valve ball is simple.

Regarding the opening and closing of the valve ball, in the present invention, the rotating arm is always in contact with at least one valve ball to open one of the valve seats. As a result, the liquid always flows through the valve port of one of the valve seats.
The liquid flows out to one of the liquid flow passages. Therefore, the valve ball is not pressed by the pressure of the liquid, and the opening and closing of the valve ball is smooth.

If, as in the above-mentioned conventional example, all valve balls are brought into a completely closed state, the pressure of the liquid in the inflow portion of the casing rises and the closing pressure on the valve balls rises. Therefore, a large opening force is required to open the valve ball, and a large force is required to operate the switching handle. As a result, the operation of the switching handle and the opening of the valve ball are not performed smoothly.

On the other hand, in order to cope with the above problem, a mechanism for reducing the strength and operating force is required in the structure of the switching handle, so that the switching valve becomes large and the cost increases. On the other hand, in the present invention, as described above, the opening and closing of the valve ball is smooth and the structure is simple. Therefore, according to the present invention, it is possible to provide a switching valve that can be reduced in overall thickness, has a simple structure, and can smoothly open and close a valve ball.

[0021]

Embodiment 1 A switching valve according to an embodiment of the present invention will be described with reference to FIGS. First, as shown in FIG. 1, the switching valve 1 of the present embodiment includes a raw water outlet 21, a shower hole 22, and a water purification nozzle 2.
And 3 is a tap water switching valve for switching the flow path of tap water. That is, as shown in FIGS. 1 and 2, the switching valve 1 includes a housing 1 provided on the liquid inflow side, a casing 2 provided with a plurality of liquid flow passages laminated and connected to the lower surface of the housing 1, and A switching handle 4 for switching the liquid (tap water) to one of the liquid flow passages.

The plurality of liquid flow passages include a raw water passage 210 that guides tap water to a raw water outlet 21, a shower passage 220 that guides tap water to a shower hole 22, and a water purification passage that guides water to a water purification nozzle connected to a water purifier. A passage 230 (see FIGS.
(Fig. 5). The housing 1 has an opening 15 that opens to the inflow portion 20 of the casing 2.

On the other hand, as shown in FIGS. 1 to 3, the casing 2 has a plurality of valve seats 31, 32, and 33 for communicating between the inflow portion 20 and the plurality of liquid flow passages. It has a valve seat plate 3 parallel to the direction in which the housing 1 and the casing 2 are stacked. The valve seat 31, 3
Valve balls 51, 52, and 53 for opening and closing the valve ports are mounted on the valves 2 and 33, respectively (FIGS. 1 to 3).

The switching handle 4 is shown in FIGS.
As shown in FIG. 7, the rotary arm 40 has a rotary arm 40 which is horizontally rotated along the valve seat plate 3 on the valve seat plate 3. In addition, a contact portion 43 that contacts the valve balls 51 to 53 is provided at a central portion of the tip of the rotating arm 40. As shown in FIG. 2, the valve balls 51 to 53 are arranged on the valve seats 31 to 33 on the rotation trajectory of the rotating arm 40.

When the switching handle 4 is turned, the turning arm 40 comes into contact with at least one of the valve balls 51 to 53 and at least one of the valve balls 51 to 53 is turned on.
The valve seat is opened by abuttingly moving the valve in the lateral direction (FIGS. 2 and 3). Further, the rotating arm 40 is always in contact with at least one valve ball (FIG. 2), and all the valve seats 3
1 to 33 are not closed at the same time.

Next, the above will be described in detail. First, as shown in FIG. 1, the housing 1 has a screen 13 provided on the gasket 12 above the opening 15. The upper part of the housing 1 is fitted to a tap faucet 19 for supplying tap water 100 by a cap nut 18 via a packing 11.

Next, under the housing 1, a casing 2 is laminated and joined. As shown in FIGS. 1, 3, and 4, the casing 2 is provided with an inflow portion 20 and each liquid flow passage (2).
10, 220, 230). As shown in FIG. 3, the valve seat plate 3 has a valve seat 31 opening in the raw water passage 210 and a shower passage 220.
Valve seat 32 opening to water passage, valve seat 3 opening to water purification passage 230
3 The valve seats 31 to 33 are located on the rotation trajectory of the rotation arm 40 of the switching handle 4 (FIG. 2, FIG.
(Fig. 5).

As shown in FIGS. 1 and 3, the casing 2 holds the valve balls 51 to 53 movably, and normally positions the valve balls 51 to 53 on the valve seats 31 to 33. It has a holding guide 56 for keeping. The holding guide 56, as shown in FIG.
33 as well).
65. Further, as shown in FIG. 3, the holding guide 56 has partition walls 561 to 564 for isolating and holding the valve bulbs 51 to 53 from each other.

Next, on the upper surface of the valve seat plate 3, a rotary arm 40 of the switching handle 4 is mounted so as to be rotatable. The rotating arm 40 is connected to an upwardly extending handle shaft 48 as shown in FIGS. The handle shaft 48 is supported by the casing 2, and the upper part thereof is connected to a handle lever 49. The rotating arm 40 has tapered portions 411 and 412 for scooping a valve ball on the right and left sides of the contact portion 43.

As shown in FIGS. 1, 5, 6A and 6B, the turning arm 40 has a bottom channel 42 extending on the bottom surface thereof in the longitudinal direction of the turning arm 40.
When the valve ball 51 is pushed by the rotating arm 40 to open the valve seat 31, a part of the valve seat 31 is closed by the bottom surface of the rotating arm 40. It is effective (Fig. 1, Fig. 6 (A),
(B)). A cover 29 is provided outside the casing 2 as shown in FIG. Nozzle 23 for water purification
Is connected to the filter of the water purifier via a hose (see Fig. 7).

Next, the operation and effect of this embodiment will be described. First,
In FIG. 1, tap water 100 supplied from faucet 19
Enters the inlet 20 of the casing 2 through the screen 13 and the opening 15 of the housing 1. And the valve seats 31 to
33, the raw water enters the raw water passage 210 via the valve seat 31 (FIGS. 1 to 3) which is open, and is discharged from the raw water outlet 21. Similarly, when the valve seat 32 is open, the tap water enters the shower passage 220 and is sprayed from the shower hole 22. When the valve seat 33 is open, the tap water enters the water purification passage 230 and enters the water purifier via the water purification nozzle 23.

Next, the valve ball 51 (the same applies to 52 and 53)
1 and 2, the switching handle 4 is rotated, for example, in the direction S in FIGS. 2 and 6, and the rotating arm 40 is rotated rightward via the handle shaft 48. Thereby, as shown in FIG. 5 and FIG. 6, the tapered portion 411 provided on the right side of the tip
1 is gradually scooped, and the valve ball 51 is
Move away from. And finally,
The contact portion 43 at the center of the tip of the rotating arm 40 pushes the valve ball 51 to the opposite side of the valve seat 31 and holds it there (FIG. 1).

As a result, as shown in FIGS. 1, 2, 5 and 6, the valve seat 31 is opened, and tap water is supplied to the raw water passage 21 through the valve seat 31 and the bottom water passage 42 of the rotating arm 40.
Outflow to zero. Next, when the switching handle 4 is further rotated in the direction S in FIGS. 2 and 6, the rotating arm 40 is rotated rightward in FIG. It comes off from the contact part 43 and the taper part 412 on the left side. Therefore, the valve ball 51 is formed by the downward tapered bottom 565 of the holding guide 56.
It rolls in the direction of the valve seat 31 along (FIG. 1) and closes the valve seat 31.

Before the valve seat 31 is closed, that is, before the valve ball 51 is completely removed from the tapered portion 412 of the rotating arm 40, the tapered portion 411 of the rotating arm 40 is required.
Scoops up the valve bulb 52 on the valve seat 33 and allows tap water to flow out of the valve seat 33 into the water purification passage 230. Then, the valve seat 33 is opened in the same manner as described above. These things, valve seat 3
The same applies to No. 2.

As described above, the rotating arm 40 of this embodiment is
As described above, it is rotated in the horizontal direction to open at least one of the valve seats 31 to 33 to prevent tap water from staying in the inflow portion 20. Valve balls 51-53 for that,
It is not completely closed by the hydrostatic pressure of tap water (3.5-7.5 kg / cm ² ), so that a strong force is not required to open the valve ball. Further, since the rotating arm 40 has the tapered portions 411 and 412, the valve balls 51 to 412 are provided.
53 can be opened and closed smoothly.

In the switching valve of the present embodiment, a casing 2 is laminated on the lower surface of the housing 1, and a valve seat plate 3 is provided in the casing 2 so as to be parallel to the lamination direction of the housing and the casing. The rotating arm 40 is arranged on the upper surface of the valve seat plate 3 so as to rotate along the valve seat plate 3.
Therefore, the housing 1, the casing 2, and the valve seat plate 3 and the rotating arm 40 in the casing 2 are located in parallel in the vertical direction.

Further, for this reason, the rotating arm 40 moves parallel to the above-mentioned laminating direction, and the valve balls 51 to 51 on the valve seats 31 to 33 are moved.
53 also moves in parallel. Therefore, the switching valve 10
The whole becomes flat, and the thickness in the vertical direction is reduced. Further, as described above, the switching valve 10 of this embodiment has a simple valve ball opening / closing structure.

Embodiment 2 As shown in FIG. 7, this embodiment employs the switching valve 1 shown in Embodiment 1.
0, the valve seat 33 that opens to the water purification passage 230 is arranged on the near side of the switching valve 10 (the lower side in FIG. 7), that is, near the switching valve operator. That is, the valve seat 33 is
Compared to the first embodiment (compare FIG. 2 and FIG. 7), it is arranged on the near side. With this arrangement, the filter section 300 of the water purifier can be arranged near the faucet 19.

Therefore, the filter unit 300 does not hinder the work (eg, washing dishes) in the cooking sink. Others are the same as the first embodiment. Also, in this embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 3 This embodiment is an example in which a stopper 60 for holding the switching handle 4 at a desired position is provided in the casing 2 as shown in FIGS. The stopper 60 is
It is integrally connected to the handle shaft 48. The stopper 60 is a resilient arm 6 that is bent in the left-right direction and extends.
1 and engaging projections 611 provided at both ends thereof. The arm 61 is made of, for example, a leaf spring. On the other hand, a locking cylinder 65 having a locking recess 651 is arranged around the handle shaft 48.

Therefore, the handle shaft 4 is switched by the switching handle.
When the user rotates the stopper 8, the stopper 60 also rotates. When the contact portion 43 of the rotating arm 40 pushes the valve ball 51 to open the valve seat 31, the stopper 6
0 engages with the engaging recess 651. Therefore, the rotating arm 40 is held at that position. Similarly, the rotating arm 40 is connected to the valve ball 52 or 53
Also, in the position where is opened, the engaging convex portion 611 of the stopper 60 is engaged with the locking concave portion 651 and holds the rotating arm 40 at that position.

Therefore, the switching handle 4 can be held at a desired position. Further, by providing the stopper 60, it is possible to give a sense of stopping of the switching handle 4 at each position of purified water, raw water, and shower. In this example, as shown in FIGS. 8 and 9, a cylindrical holding guide 56 for regulating the movable range of the valve balls 51 to 53 is provided. Others are the same as the first embodiment, and the same effects as the first embodiment can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a switching valve according to a first embodiment taken along line AA of FIG. 2;

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a sectional view taken along line CC of FIG. 2;

FIG. 5 is a plan view of a rotating arm according to the first embodiment.

6A and 6B are a front view (A) and a side view (B) of the rotating arm and the valve ball in the first embodiment.

FIG. 7 is a plan view of a switching valve according to a second embodiment.

8 is a partial cross-sectional view of a switching valve according to a third embodiment, and FIG.
Sectional view taken along the line FF of FIG.

FIG. 9 is a sectional view taken along line GG of FIG. 8;

FIG. 10 is a sectional view of a switching valve in a conventional example.

FIG. 11 is an explanatory diagram showing rotation of a rod-shaped member and operation of a valve ball in a conventional switching valve.

[Explanation of symbols]

 1. . . Housing, 10. . . Switching valve, 2. . . Casing, 20. . . Inflow section, 21. . . Raw water outlet, 210. . . Raw water passage, 22. . . Shower hole, 220. . . Shower corridor, 23. . . Nozzle for water purification, 230. . . 2. water purification passage; . . Valve seat plate, 31-33. . . Valve seat, 4. . . Switching handle, 40. . . Rotating arm, 43. . . Contact part, 51-53. . . Bulb,

Continuation of the front page (56) References JP-A 4-132271 (JP, U) JP-A 48-87634 (JP, U) JP-A 48-78427 (JP, U) JP-A 61-35275 (JP) , U) Shokai Sho 60-150375 (JP, U) Shoko 52-31445 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 11/00-11/24 F16K 1/14

Claims (5)

(57) [Claims] 1. A housing provided on a liquid inflow side, a casing provided with a plurality of liquid flow passages stacked and connected to a lower surface of the housing, and a switching handle for switching liquid to one of the liquid flow passages. A switching valve having a plurality of valve seats for communicating between the inflow portion and the plurality of liquid flow passages in the casing. the have parallel valve seat plate in the stacking direction between the housing and the casing and having, and it is to the plurality of valve seats on
Each has a valve ball is located, also, the switching handle has a pivot arm that pivots along a valve seat plate in the valve seat plate,
Each of the above-mentioned valve balls is arranged on the rotation locus of the turning arm, and when the switching handle is turned, the turning arm comes into contact with at least one valve ball to move the valve ball in the lateral direction. And the valve is opened by rotating the arm.
Open the valve seat where the valve ball is located.
A switching valve , wherein the fluid is always discharged through a valve port of one of the valve seats . 2. The method according to claim 1, wherein the casing is
A switching valve, comprising: a holding guide for holding each of said valve balls so as to be movable and for normally keeping said valve balls on said valve seat. 3. The switching arm according to claim 1, wherein the turning arm of the switching handle has a contact portion at a center portion of a tip portion thereof for holding a valve ball at a valve opening position. A switching valve having a tapered portion for scooping up a valve ball on the left and right sides of the contact portion. 4. The switching valve according to claim 1, wherein the switching handle has a stopper for holding the switching handle at a desired position. 5. The liquid flow path according to claim 1, wherein the liquid is water, and the plurality of liquid flow paths are a raw water path for guiding the water to a raw water outlet, and a shower path for guiding the water to a shower hole. And a water purification passage for guiding the water to a water purification nozzle connected to the water purifier.