JPH11315943A - Fluid flow cutoff valve and fluid flow route switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid flow cutoff valve easily miniaturized and requiring no lubricants. SOLUTION: In an upper surface of a main body section 20 incorporating a flow route, a receiving surface 28 is provided for receiving fluids such as water, and a plurality of introducing routes 30 or the like are formed therein so as to be connected with the flow route. On the receiving surface 28, a closing member 22 having a valve element 41 or the like for closing the introducing routes 30 or the like is rotatably attached and, by rotating the closing member 22 by an operating handle 24, the valve element 41 or the like is disposed above the selected introducing route 30 or the like. When fluids are received by the receiving surface 28 in this state, the valve element 41 or the like is pressed to the receiving surface 28 side by the pressure of the fluid, and the introducing route 30 or the like positioned below the same is closed. Thus, the flow of the fluids to the closed introducing route 30 or the like is cut off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutoff valve and a flow path switching device, and more particularly to a fluid flow shutoff valve and a fluid flow switching device.

[0002]

2. Description of the Related Art A water tap-installed type water purifier used for purifying tap water is provided with a flow path switching device which can be directly attached to a water tap and a detachable / removable with respect to the flow path switching device. It mainly comprises a mounted filter cartridge which has a built-in filter member for filtering and purifying tap water. The flow path switching device generally includes a flow path for discharging tap water as raw water, a flow path for discharging raw water in a shower form, and a flow path for guiding the raw water into a filter cartridge. A valve body for selecting and switching one of the flow paths, that is, a valve body for setting the selected flow path to an open state and simultaneously setting the other flow paths to a closed state.

A valve element used in such a flow path switching device is disclosed in, for example, Japanese Utility Model Laid-Open No. 5-77668 and Japanese Utility Model Laid-Open No.
As described in JP-A-43435, it is a sphere having a guide path for guiding tap water in the direction of the above-described predetermined flow path. The sphere is rotatably mounted in the flow switching device and has an operation handle,
The guide path is selected when the operation handle is rotated to guide the flow of tap water in a direction selected from the above-described predetermined flow paths, and the flow to other flow paths is blocked. it can.

[0004]

In the above-described flow path switching device, since it is necessary to secure a space for accommodating a spherical valve element, it is difficult to reduce the size. Also, in order to smooth the rotation of the valve body and enhance the operability of the operation handle,
Normally, lubricant such as grease is applied to the rotation mechanism of the valve body.However, if this lubricant deteriorates or decreases, the operability of the operation handle will decrease, so that it can be used stably for a long period of time. Requires maintenance such as adding or replacing lubricant.

An object of the present invention is to realize a fluid flow shutoff valve which can be easily miniaturized and does not require a lubricant. Another object of the present invention is to realize a fluid flow switching device which can be easily miniaturized and does not require a lubricant.

[0006]

A first aspect of the present invention provides a flow shutoff valve for shutting off the flow of a fluid, comprising a flow path having an inlet and an outlet for a fluid, and an inlet. Is disposed and has a receiving surface for receiving a fluid, a valve body movably disposed on the receiving surface and capable of closing the inlet, and an operation for moving the valve body on the receiving surface Section. Here, the valve element is
It is set so as to be pressed in the receiving surface direction by the fluid.

Second means A fluid flow switching device according to the present invention is for selecting a flow direction of a fluid in one of three or more directions, and has a fluid inlet and a fluid outlet. A body having three or more flow paths individually and independently of each other, a receiving surface for receiving a fluid in which respective inlets of the three or more flow paths are arranged, and moving on the receiving surface It comprises a closing member operably arranged and closing the inlet, and an operating part for moving the closing member on the receiving surface. The closing member is
It has a plurality of valve bodies that can be moved integrally on the receiving surface by the operation unit, and the plurality of valve bodies are provided for other flow paths except for a selected one of the three or more flow paths. The respective inlets are arranged so as to be able to be closed at the same time, and are set so as to be pressed toward the receiving surface by the fluid.

Here, the closing member has, for example, a fulcrum connected to the operation part and rotatably mounted on the receiving surface, and a joint part for connecting the plurality of valve bodies to the fulcrum. In this case, the valve bodies are arranged on a circumference centered on the fulcrum, and the inlets are arranged on the receiving surface on the same circumference centered on the fulcrum.

The valve body has, for example, a spherical surface on the receiving surface side. Alternatively, the valve body is formed, for example, in a spherical shape.

Further, the joint portion has, for example, a hinge portion which individually connects the valve body to a fulcrum and is bendable in a receiving surface direction.

Third Means A fluid flow switching device according to another aspect of the present invention is for selecting a fluid flowing direction to one of two directions. This flow path switching device has two independent flow paths each having an inlet and an outlet for the fluid,
A main body having an inlet for each of the two flow paths and having a receiving surface for receiving a fluid, and a valve disposed on the receiving surface and movable between the inlets and capable of closing the inlet. A body and an operation unit for moving the valve body between the introduction ports are provided. Here, the valve element is set so as to be pressed in the receiving surface direction by the fluid.

[0012]

[Action] When shutting off the flow of fluid through the first means circulation shut-off valve of the present invention is arranged to introduce Prompt the valve body by the operation of the operation portion is moved on the receiving surface of the body. When the receiving surface receives the flow of the fluid in this state, the valve body is pressed in the receiving surface direction to close the inlet. As a result, the fluid is blocked from flowing into the flow path of the main body. On the other hand, by operating the operation unit, the valve body is moved on the receiving surface to set the inlet to an open state, and when the receiving surface receives the flow of the fluid in that state, the fluid flows from the inlet into the channel. It enters and exits through the outlet.

Second Means In the channel switching device according to the present invention, when the operating member is operated to move the closing member on the receiving surface, the plurality of valve bodies are
In a state where the inlets of the other flow paths except one selected flow path (selected flow path) among the three or more flow paths provided in the main body by moving integrally can be simultaneously closed. Be placed.
In this state, when the receiving surface of the main body receives the flow of the fluid, the valve body is pressed in the receiving surface direction to close the corresponding inlet.
Thus, the fluid received on the receiving surface flows into the inlet of the selected flow path and is discharged from the discharge port, and is prevented from flowing into another flow path. As a result, the flow direction of the fluid is
The flow path is set to one flow path selected from three or more flow paths provided in the main body.

Third Means In a flow path switching device according to another aspect of the present invention, when an operating portion is operated to move a valve body on a receiving surface, the valve body is
The introduction port of one of the two flow paths (selected flow path) provided in the main body is placed in an open state, and the introduction port of the other flow path is disposed so as to be able to be closed. In this state, when the receiving surface of the main body receives the flow of the fluid, the valve body is pressed in the receiving surface direction to close the inlet of the other flow path. This allows
The fluid received by the receiving surface flows into the introduction port of the selected flow path and is discharged from the discharge port, and is prevented from flowing into the other flow path. As a result, the flow direction of the fluid is set to one flow path selected from the two flow paths provided in the main body.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to FIG. 1, a description will be given of a water purifier 1 in which one embodiment of a flow shutoff valve and a flow path switching device according to the present invention is employed. In the figure, a water purifier 1 includes a faucet 2
And a filter cartridge 4 removably mounted on the mounting portion 3.
And the main.

As shown in FIG. 2 (longitudinal sectional view of the mounting portion 3), the mounting portion 3 includes a housing 5 and a mounting portion 6 disposed on the housing 5 and mounted to the faucet 2. A flow switching unit 7 disposed in the housing 5 for switching the flow direction of tap water from the tap 2 (this is a flow switching of the present invention employing one form of the flow shutoff valve of the present invention). Which is an embodiment of the device).

The housing 5 has a case 8 and a bottom 9 attached to a lower part of the case 8. Case 8
This is a member for accommodating the flow path switching unit 7 therein, and has an opening 10 at an upper portion thereof and an opening 11 at a lower portion thereof. The opening 10 has a circular planar shape, and a series of walls 12 are provided upright in the vicinity of the peripheral edge. A spiral groove (not shown) is formed on the outer peripheral surface of the wall portion 12. Similarly, a spiral groove (not shown) is formed on the outer peripheral surface of the opening 11. A connection portion 13 of the filter cartridge 4 is provided to protrude from the left side of the case 8 in the drawing. The water from the tap 2 (hereinafter sometimes referred to as raw water) is provided in the connection portion 13.
A guide path 14 is formed for guiding the air toward the inside of the filter cartridge 4. Further, on the right side of the case 8 in the figure, a window 8a corresponding to a notch 33 of the flow path switching unit 7 described later is formed.

On the other hand, the bottom 9 is formed in a disk shape capable of closing the opening 11 of the case 8, and is formed in a spiral groove provided in the outer peripheral surface of the opening 11 on the inner surface of the peripheral edge 9 a. It has a corresponding spiral groove (not shown). With this spiral groove, the bottom 9 is detachably attached to the outer periphery of the opening 11 so as to close the opening 11 of the case 8. The bottom 9 has a cylindrical outlet 15 extending in the vertical direction at the center, and has a number of fine holes 16 in the periphery of the outlet 15, that is, in the bottom of the bottom 9. .

The mounting section 6 mainly includes a packing 17 and a mounting ring 18. The packing 17 is a disc-shaped member formed of an elastic material such as rubber and having a through hole 19 in the center, and is disposed inside the wall 12 on the opening 10 of the case 8 of the housing 5. ing. On the other hand, the mounting ring 18 is formed in an annular shape, and has a spiral groove (not shown) corresponding to the above-mentioned spiral groove formed on the outer peripheral surface of the wall portion 12 on the inner peripheral surface. With this spiral groove, the attachment ring 18 is detachably attached to the outer peripheral surface of the wall portion 12. The mounting ring 18 is set such that the inner peripheral edge 18 a is located inside the wall 12 when the mounting ring 18 is mounted on the wall 12.

The flow path switching unit 7 includes a main body 20, a guide member 21, a closing member 22, a lid 23, and an operation handle 2.
4 mainly. FIG. 3 (plan view), FIG. 4 (front view), FIG. 5 (cross-sectional view taken along line V-V in FIG. 3 and FIG. 4), FIG.
The details of the main body 20 will be described with reference to (VI-VI cross-sectional view of FIG. 4), FIG. 7 (bottom view), and FIG. 8 (VIII-VIII cross-sectional view of FIG. 3).

The main body 20 is formed in a substantially cylindrical shape, has an opening at the bottom 20 a, and has a protruding portion 25 toward the connecting portion 13 of the housing 5. The protruding portion 25 is formed with a first flow path 26 having an opening at the tip end and extending substantially horizontally toward the center of the main body 20.

An upper wall of the main body 20 is formed with a wall 27 standing upright on a peripheral edge, and a receiving surface 28 surrounded by the wall 27 is formed. In the center of the receiving surface 28, a hole 29 having a bottom for mounting the closing member 22 is formed. In the receiving surface 28, the first inlet 30, the second inlet 31, and the third inlet 32 are provided on the side of the protrusion 25 on the circumference C <b> 1 around the hole 29.
Are arranged adjacent to each other. A packing P is arranged on the inner periphery of each of the inlets 30, 31, 32. The first inlet 30 is connected to the first flow path 26
And is connected to the first flow path 26. A fan-shaped notch 33 formed in a horizontal direction from the hole 29 is provided at a substantially central portion in the height direction of the main body 20.

A second flow path 34 extending downward from the second inlet 31 along the outer peripheral portion of the hole 29 and having an open lower end.
Are formed. The lower end of the second flow path 34 and the hole 2
A guide groove 35 is formed between the back surface 9 and the center of the back surface 9. Further, below the third inlet 32, a third flow path 36 defined by the first flow path 26 and the hole 29 is formed. The third flow passage 36 opens toward the bottom 20 a of the main body 20.

As shown in FIG. 9 (plan view) and FIG. 10 (XX sectional view of FIG. 9), the guide member 21 is formed in a substantially disk shape, and has a through hole 37 at the center. ing. A receiving groove 38 formed in a shape corresponding to the guide groove 35 of the main body 20 is formed on the upper surface of the guide member 21.

As shown in FIG. 11 (a view corresponding to FIG. 8), the receiving groove 38 has the guide groove 3 as shown in FIG.
5, the upper surface is fixed from the back surface of the hole 29 to the lower end of the second flow path 34. As a result, the receiving groove 38 and the guide groove 35 are integrally formed with the second flow path 34.
And a through-hole 37 are formed.

In the main body 20 to which the guide member 21 is fixed, the first flow path 26, the second flow path 34, and the third
The outlet of the flow path 36 has an opening on the protruding portion 25 side,
Through hole 37 of guide member 21 and bottom 2 of main body 20
0a.

As shown in FIG. 12 (plan view) and FIG. 13 (cross-sectional view taken along the line XIII-XIII in FIG. 12), the closing member 22 is arranged on a fulcrum 40 and a circumference C2 around the fulcrum 40. Three valve bodies, namely, a first valve body 41, a second valve body
It has a valve body 42 and a third valve body 43. In addition, the circumference C2 assumed here is the inlet 3
0, 31, and 32 correspond to the arranged circumference C1.
The fulcrum 40 is a substantially columnar member formed to be insertable into the hole 29 of the main body 20, and has a hole 4 at the center of the upper surface.
0a.

On the other hand, the first valve element 41 and the third valve element 43 are arranged on a straight line with the fulcrum 40 interposed therebetween, and the second valve element 42 is one valve element from the third valve element 43. The first valve body 41 is disposed adjacent to the first valve body 41 with an interval of about minutes. Each of the first valve element 41, the second valve element 42, and the third valve element 43
Both are the first inlet 30 and the second inlet 31 of the main body 20.
The third inlet 32 has a disk shape slightly larger in diameter than the third inlet 32, and has a spherical bottom surface. The first valve body 41, the second valve body 42, and the third valve body 43
Are connected to the upper end of the fulcrum 40 by individual joints 44, respectively.

The above-mentioned fulcrum 40 constituting the closing member 22,
The valve bodies 41, 42, 43 and the joints 44 are integrally formed using a resin material, and the joints 44 are given flexibility.

As shown in FIG. 2, such a closing member 22 is mounted by rotatably inserting the fulcrum 40 into the hole 29 of the main body 20. As a result, each of the valve elements 41, 42, 43 is disposed on the receiving surface 28 on the bottom surface side, and can rotate on the receiving surface 28 about the fulcrum 40.

FIG. 14 (plan view) and FIG.
As shown in FIG. 5 (a cross-sectional view taken along the line XV-XV in FIG. 14), the member 5 is formed in a substantially disk shape, and has an upright portion 45 that can be fitted into the opening 10 of the housing 5 on the upper surface side. A vertical wall portion 4 that can be fitted on the bottom surface side inside the wall surface 27 of the main body portion 20.
6. An opening 47 is formed in the center of the lid 20. This opening portion 47 is
The fixing piece 4 is divided downward from the center thereof.
8 are protruding.

As shown in FIG. 2, the lid 23 is disposed on the closing member 22 attached to the main body 20, and the vertical wall 46 fits inside the wall 27 of the main body 20. doing. At the same time, the fixing piece 48 of the lid 23 is fitted into the hole 40 a provided at the fulcrum 40 of the closing member 22, thereby stably pressing the closing member 22 downward with respect to the main body 20. keeping.

The operation handle 24 is, as shown in FIG.
It is a substantially rod-shaped member having a handle 49 at one end, and is disposed in the cutout portion 33 of the main body 20 so that the handle 49 side projects outside from the window 8a of the case 8.
The other end of the operation handle 24 is disposed in the hole 29 of the main body 20, and the lower end of the fulcrum 40 of the closing member 22 penetrates and is fixed. As a result, the operation handle 24
Is rotatable about the fulcrum 40 in the notch 33, and the closing member 2
The second fulcrum 40 is set so that it can be rotated.

As shown in FIG. 2, the flow path switching section 7 is disposed in the housing 5 so that the projecting section 25 of the main body section 20 is directed toward the mounting section 13 of the housing 5. Here, the upright portion 45 of the lid 23 is fitted into the opening 10 of the housing 5, and the bottom surface of the guide member 21 is in water-tight contact with the upper surface of the outlet 15 of the bottom 9.
A connecting member 50 is arranged between the projecting portion 25 of the main body 20 and the connecting portion 13 of the housing 5. One end of the connecting member 50 is fitted to the outer peripheral surface of the protruding portion 25, and the other end is inserted into the guide path 14 in the connecting portion 13. As a result, the first flow path 26 of the flow path switching unit 7 is
It is connected to the.

The filter cartridge 4 includes the mounting portion 3
The filter member is detachably attached to the connection portion 13 of the first embodiment, a filtering material is disposed inside the connection portion 13, and a drain port 4a is provided on a bottom portion (FIG. 1). This filter cartridge 4
The internal flow path is formed such that the raw water from the connecting portion 13 is introduced into the inside, purified by a filtering material, and the purified raw water can be discharged to the outside from the drain port 4a.

As shown in FIG. 1, the water purifier 1 is attached to the faucet 2 by the attaching portion 3. Here, first, the attachment ring 18 of the attachment portion 3 is passed through the faucet 2, and the attachment 2 a is attached to the tip of the faucet 2. Then, as shown in FIG. 2, the attachment 2 a comes into contact with the upper surface of the packing 17, and in this state, the mounting ring 18 is mounted on the wall 12 of the housing 5. Thereby, the attachment 2 a is pressed onto the packing 17 by the attachment ring 18, and the entire water purifier 1 is attached to the faucet 2.

Next, the operation of the water purifier 1 will be described.
When the operation handle 24 is moved within the cutout portion 33 in the flow path switching portion 7, the fulcrum 40 of the closing member 22 is rotated accordingly, and each valve element 4 connected to the fulcrum 40 is rotated.
1, 42 and 43 rotate integrally on the circumference C1 of the receiving surface 28.

Here, as shown in FIG.
1 is located on the first inlet 30 of the receiving surface 28 and the second
When the operating handle 24 is operated so that the valve element 42 is disposed on the third inlet 32, the third valve element 43 moves to the receiving surface 28.
And the second inlet 31 is opened. In this state, the raw water from the faucet 2 passes through the through hole 19 of the packing 17 and the opening 47 of the lid 23 and receives the receiving surface 28.
And flows down to the central portion thereof and is received by the receiving surface 28.

The raw water received by the receiving surface 28 presses the first valve 41, the second valve 42, and the third valve 43 toward the receiving surface 28 by the water pressure. Here, the first valve body 4
As shown by a dashed line in FIG. 19, the bottom surfaces of the first and second valve bodies 42 are pressed downward against the packings P of the first inlet 30 and the third inlet 32 by bending the joint 44 downward by water pressure. Thereby, the first inlet 30 and the third inlet 32 are connected to the first valve body 41 and the second valve body 42, respectively.
Closed watertight.

Thus, the first inlet 30 and the third inlet 30
On the receiving surface 28 with the inlet 32 closed, the raw water
As shown in FIG.
As shown by an arrow in FIG. 7, the liquid passes through the second flow path 34, the flow path 39, and the through hole 37, further passes through the discharge port 15 of the bottom 9, and is discharged straight as it is.

Further, the operating member 24 is operated to rotate the closing member 22, and as shown in FIG. 17, the first valve element 41 is disposed on the second inlet port 31 and the second valve element 42 is connected to the first inlet port. When set to be placed on the mouth 30, the receiving surface 2
The raw water received by each of the valve elements 8 is supplied to each of the valve elements 4 in the same manner as described above.
1, 42, and 43 are pressed onto the receiving surface 28 so that the second inlet 3
The first and first inlets 30 are closed in a watertight manner, and flow into the third inlet 32 which is only opened. Third inlet 32
The raw water flowing into the inside passes through the third flow path 36 and the bottom 20a of the main body 20 as shown by an arrow in FIG.
Are discharged in the form of a shower from a large number of holes 16 provided in the nozzle.

Further, the operation member 24 is operated to rotate the closing member 22, and as shown in FIG.
Is disposed on the second inlet 31 and the third valve body 43 is
When set so as to be disposed on the inlet 32, the raw water received on the receiving surface 28 is supplied to each valve 4 as in the case described above.
1, 42, and 43 are pressed onto the receiving surface 28 so that the second inlet 3
The first and third inlets 32 are closed in a watertight manner and flow into the first inlet 30 which is only open. First inlet 30
The raw water flowing into the inside passes through the first flow path 26 as shown by an arrow in FIG.
And is introduced into the filter cartridge 4.
The raw water introduced into the filter cartridge 4 is filtered by the filtering material there, and is discharged to the outside from the outlet 4a as purified water.

In the water purifier 1 as described above, the flow path switching unit 7 causes the valve bodies 41, 42, 43 to open the inlets 30, 31, 3 by the pressure of the raw water received on the receiving surface 28 as described above.
Since these can be closed by pressing them on, a lubricant such as grease for smoothly rotating the valve element is required as in the case of the conventional flow path switching device having a spherical valve element. And not. For this reason, the water purifier 1 does not require maintenance such as addition or replacement of the lubricant for the flow path switching unit 7, and thus can be stably used for a long period of time.

Further, the above-mentioned flow path switching section 7 is
8 on the circumference centered on the hole 29,
Since 32 are arranged and the valve bodies 41, 42, 43 are arranged on the same circumference, the water pressure of the raw water flowing down to the center of the receiving surface 28 is evenly applied to any of the valve bodies 41, 42, 43. Will be. Therefore, these valve elements 41, 42,
43 can stably close each of the inlets 30, 31, 32.

Further, since the closing member 22, especially the valve elements 41, 42 and 43, are formed flat, the above-mentioned flow path switching section 7 does not require a large space for accommodating it, It can be made smaller (especially flat) as compared with the one provided with a spherical valve element. For this reason,
Such a flow path switching unit 7 can reduce the size of the attachment unit 3 (particularly, flatten it), so that it is possible to realize the water purifier 1 that is hardly obstructed in the kitchen sink.

Other Embodiments (1) In the above embodiment, the valve body 4 of the closing member 22
Disk-shaped ones having the receiving surface 28 side formed in a spherical shape were used as 1, 42, and 43, but these valve bodies 41, 42, and 43 were used.
The present invention can be carried out in the same manner even when 43 has a spherical shape.

(2) In the closing member 22 used in each of the above embodiments, the valve bodies 41, 42, 43 and the fulcrum 40
FIG. 20 (FIG. 13)
May be provided with a hinge portion 44a that bends the valve bodies 41, 42, 43 downward as shown in FIG. In this case, since the joint 44 is easily bent in the direction of the receiving surface 28 by the hinge portion 44a, the valve bodies 41, 42, 43
Can more reliably close the inlets 30, 31, 32.

(3) In the above embodiment, the closing member 2
As 2, the valve body 41, 42, 43 is connected to the fulcrum 40 by the joint 44, but the present invention is not limited to this. For example, a closing member 60 as shown in FIGS. 21 and 22 (a cross-sectional view taken along line XXII-XXII in FIG. 21).
The present invention can be carried out in the same manner even when is adopted. The closing member 60 has a fulcrum 61 rotatably inserted into the hole 29 described above, and a support disk 62 formed integrally and horizontally at one end of the fulcrum 61.
The support disk 62 is formed with three substantially circular cutouts 63, 64, and 65, each of which is partially open on the outer peripheral side, and a hemispherical valve body 66 is provided in each of the cutouts. It is loosely fitted so that it can move in the direction. The three notches 63, 64, 65 are arranged on the circumference C2 around the fulcrum 61 in the same manner as the valve bodies 41, 42, 43 of the closing member 22 used in the above-described embodiment. ing. As a result, these notches 63,
The valve bodies 66 respectively fitted into the valve members 64, 64 are provided on the support disk 62 with the valve bodies 41, 4 of the above-mentioned closing member 22.
2, 43 are arranged on the circumference C2 centering on the fulcrum 61.

In the above embodiment, the closing member 22
When such a closing member 60 is used in place of the above, the raw water flowing down on the receiving surface 28 presses each valve element 66 toward the receiving surface 28. As a result, the valve element 66 is pressed against the corresponding inlet 30, 31, or 32 on the spherical surface side, and closes them watertight. In this embodiment, each valve element 6
6 may be formed in a spherical shape.

(4) In the above-described embodiment, the flow direction of the raw water is determined by three flow paths (ie, the first flow path 26 from the first inlet 30 and the second flow path 34 from the second inlet 31). And the flow path switching unit 7 for selecting from the third flow path 36) from the third inlet 32 has been described as an example, but the flow path switching unit for selecting the flow direction of the raw water from the two flow paths. The flow shutoff valve of the present invention can be similarly adopted.

For example, when such a flow switching unit is employed in the above-mentioned water purifier 1, as shown in FIG.
An inlet 71 and a second inlet 72 are provided, and the closing member 22 is provided.
The one provided with only one valve body 73 is used. Here, the first inlet 71 corresponds to the first inlet 30 described above, and the second inlet 72 corresponds to the second inlet 31 described above.

In such a flow path switching section, when the valve body 73 is disposed on the first inlet 71 by operating the operation handle 24, the raw water flowing down on the receiving surface 28 presses the valve body 73. The first inlet 71 is closed and the second inlet 7
2 The raw water is discharged as raw water. On the other hand, when the valve body 73 is arranged on the second inlet 72 by operating the operation handle 24, the raw water flowing down on the receiving surface 28 is discharged from the valve body 73.
Is pressed to close the second inlet 72, and the ink flows into the filter cartridge 4 from the first inlet.

(5) In each of the embodiments described above, the case where the flow shutoff valve and the flow path switching device of the present invention are used for a water purifier, that is, the case where water is used as a fluid, has been described. The same applies to the case where the flow of various fluids such as gas is shut off or the flow path is switched.

(6) In each of the above-mentioned embodiments, an auxiliary pressing means for more stably closing the inlet by the valve body may be employed. For example, in the flow path switching unit 7 according to the above-described embodiment, each of the inlets 30,
Protrusions that project toward 31 and 32 and that have a smooth spherical tip may be provided. In this case, when the valve elements 41, 42, 43 are arranged on the inlets 30, 31, 32, the upper surfaces thereof are pushed by the projections, and the inlets 30, 3, 3 are pressed.
Pressing is more reliably performed against the packings P arranged at the positions 1 and 32.

[0055]

The fluid flow shutoff valve according to the present invention has the above-described valve element pressed in the direction of the receiving surface by the fluid, so that it can be made compact, and the lubricant can be used. Can be used without using

Since the fluid flow switching device according to the present invention has the above-described valve element pressed in the direction of the receiving surface by the fluid, the device can be made compact, and can use a lubricant. Can be used without.

[Brief description of the drawings]

FIG. 1 is a perspective view of a water purifier employing an embodiment of the present invention.

FIG. 2 is a partial vertical sectional view of the water purifier, including the embodiment.

FIG. 3 is a plan view of a main body used in the embodiment.

FIG. 4 is a front view of the main body.

FIG. 5 is a sectional view taken along line VV of FIG. 3;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is a bottom view of the main body.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 3;

FIG. 9 is a plan view of a guide member used in the embodiment.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is a view corresponding to FIG. 8 when the guide member is attached to the main body.

FIG. 12 is a plan view of a closing member used in the embodiment.

FIG. 13 is a sectional view taken along line XIII-XIII of FIG. 12;

FIG. 14 is a plan view of a lid used in the embodiment.

FIG. 15 is a sectional view taken along line XV-XV in FIG. 14;

FIG. 16 is a plan view when one channel is selected in the embodiment.

FIG. 17 is a plan view when another flow path is selected in the embodiment.

FIG. 18 is a plan view when another flow path is selected in the embodiment.

FIG. 19 is an explanatory diagram of the operation of the valve element according to the embodiment.

FIG. 20 is a diagram corresponding to FIG. 13 in another embodiment of the present invention.

FIG. 21 shows still another embodiment of the present invention.
FIG.

FIG. 22 is a sectional view taken along the line XXII-XXII of FIG. 21;

FIG. 23 shows still another embodiment of the present invention.
FIG.

[Explanation of symbols]

 7 flow path switching section 20 main body section 22 closing member 24 operation handle 26 first flow path 28 receiving surface 30 first introduction port 31 second introduction port 32 third introduction port 34 second flow path 36 third flow path 40 fulcrum 41 1st valve body 42 2nd valve body 43 3rd valve body 44 Joint 44a Hinge part 60 Closing member 66 Valve body 71 1st inlet 72 Second inlet 73 Valve body

Continuation of front page (72) Inventor Koichi Tokuhisa 4-chome, Kokurakita-ku, Kitakyushu-shi, Fukuoka

Claims (7)

[Claims] 1. A flow shutoff valve for shutting off flow of a fluid, comprising: a flow path having an inlet and an outlet for the fluid; and a receiving surface on which the inlet is disposed and for receiving the fluid. A main body comprising: a main body, a valve body movably disposed on the receiving surface, the valve body capable of closing the introduction port, and an operation unit for moving the valve body on the receiving surface. A fluid flow shutoff valve, wherein the valve body is set so as to be pressed in the receiving surface direction by the fluid. 2. The method according to claim 1, wherein the flow direction of the fluid is one of three or more directions.
A flow path switching device for selecting a direction, wherein each of the three or more flow paths has three or more independent flow paths, each of which has an inlet and a discharge port for the fluid. A body having the inlet arranged therein and having a receiving surface for receiving the fluid; a closing member movably disposed on the receiving surface and closing the inlet; and An operating unit for moving on the receiving surface, wherein the closing member has a plurality of valve bodies that can be integrally moved on the receiving surface by the operating unit, and the plurality of valve bodies are The inlets of the other flow paths except one selected from among the three or more flow paths are arranged so as to be able to be simultaneously closed, and are pressed in the receiving surface direction by the fluid. Fluid flow switching device set as follows. 3. The closing member has a fulcrum connected to the operating portion and rotatably attached to the receiving surface, and a joint for connecting the plurality of valve bodies to the fulcrum. 3. The valve according to claim 2, wherein the valve element is arranged on a circumference centered on the fulcrum, and the introduction port is arranged on the receiving surface on the circumference centered on the fulcrum. 4. Fluid flow switching device. 4. The fluid flow switching device according to claim 2, wherein the valve body has a spherical surface on the receiving surface side. 5. The fluid flow switching device according to claim 2, wherein the valve element is formed in a spherical shape. 6. The fluid according to claim 3, wherein said joint portion has a hinge portion which individually connects said valve body to said fulcrum and is bendable in a direction of said receiving surface. Channel switching device. 7. A flow path switching device for selecting one of two directions of flow of a fluid, comprising two independent inlets and one outlet for the fluid. And a main body provided with a receiving surface for receiving the fluid and each of the inlets of the two flow channels being arranged, and being disposed on the receiving surface and moving between the inlets. A valve element capable of closing the introduction port, and an operation unit for moving the valve element between the introduction ports, wherein the valve element is pressed in the receiving surface direction by the fluid. The fluid flow path switching device set in.