JP6527675B2 - Flow path changer and water purifier - Google Patents

Description

  The present invention is connected to a faucet and used to switch and output a fluid supplied from a faucet to a supply port from either of two discharge ports by a switching valve, and the flow path switcher. It relates to the water purifier equipped.

  As a flow path switching device of this type, a flow path switching device disclosed in the aspect of a water purifier in Patent Document 1 below is known. This water purifier is a water switch case in which a plurality of water supply holes, a cross cylindrical wall in which a horizontal valve stem is inserted, a water discharge port and a water purification port are formed sequentially from the water supply port to which raw water is supplied downward. And the water supply holes and the water discharge ports are formed in the intersecting cylindrical wall. Further, a seal is attached to each water supply hole, and a vertical valve rod for opening and closing the water supply hole is inserted. In addition, a water channel groove is formed at each position aligned with the water supply hole of the horizontal valve rod, and a projection cam for moving the vertical valve rod inserted in the corresponding water supply hole up and down is different in each water channel groove. It is provided at the mounting angle.

  With this configuration, in this water purifier, when the horizontal valve stem is rotated, one of the projecting cams moves the vertical valve stem upward according to the rotational position of the horizontal valve stem. By releasing the closure of the water supply hole by the seal attached to the vertical valve rod, it is possible to selectively communicate the water supply hole with the water channel.

Patent No. 3218856 (page 2-3, FIG. 2-3)

  However, the following problems to be solved exist in the above-described flow channel switching device. That is, in this flow path switching device, a vertical valve rod as a valve body is disposed for each of a plurality of water supply holes, and the same number of projecting cams as the vertical valve rods are disposed on the outer periphery of the horizontal valve rod. A configuration is employed in which the corresponding vertical valve stem is moved up and down in accordance with the rotation angle of the horizontal valve stem. For this reason, even when this configuration is applied to a flow path switching device that switches the fluid supplied from the faucet to the supply port (water supply port) from either of the two outlets and outputs the same, it is separately formed 2 There is a problem to be solved that the structure becomes complicated because one valve body is required.

  The present invention has been made to solve such problems, and comprises two valve bodies integrally formed as one member with a fluid supplied from a faucet to a supply port at any one of two discharge ports. A main object of the present invention is to provide a flow path switching device which can be switched and a water purifier provided with the flow path switching device.

In order to achieve the above object, the flow path changer according to claim 1 has a supply port connected to a faucet, two discharge ports disposed on the surface, and the supply port and the two discharge ports. The two flow paths separately communicate with the two discharge ports, a case portion having a flow path formed therein, and a supply side flow path as a part of the flow path disposed in the case portion and communicating with the supply port. Supply to the supply side flow path from the faucet through the supply port by switching to and communicating with one desired discharge side flow path of the two discharge side flow paths as a part of the flow path And a switching valve for discharging the fluid from one of the two discharge ports in communication with the desired one discharge side flow path through the desired one discharge side flow path The flow path switching device, wherein the switching valve includes the supply side flow path and the two discharges. A first valve seat disposed on a partition wall that partitions off the side flow path, and communicating the supply side flow path with the discharge side flow path of the two discharge side flow paths; A second valve seat disposed in parallel with the first valve seat and communicating the supply-side flow passage with the other discharge-side flow passage of the two discharge-side flow passages; the first in the partition wall A pivoting member pivotably disposed in a plane parallel to a direction in which the first valve seat and the second valve seat are arranged, with a portion between the valve seat and the second valve seat as a fulcrum; A first valve body formed on a portion on the first valve seat side of the surface facing the partition wall of the swinging member and a second valve body formed on the second valve seat side on the opposite surface And when the swinging member swings to the first valve seat side, the first valve body contacts the first valve seat and the supply side flow passage and the And the second valve body separate from the second valve seat to communicate the supply side flow path with the other discharge side flow path, and the swing member When swinging to the second valve seat side, the first valve body separates from the first valve seat to communicate the supply-side flow path with the one discharge-side flow path, and the second valve In the flow path switching device in which the body contacts the second valve seat to shut off the supply-side flow path and the other discharge-side flow path, the first valve seat and the second valve seat have a planar shape Each of the first valve bodies is formed in a circular column whose plane shape matches the plane shape of the first valve seat, and an O-ring is attached to the outer peripheral surface , and the first valve body Whether only a part of the peripheral edge of the first valve body contacts a part of the rim of the first valve seat when contacting the valve seat Through the state in which the contact area between the peripheral edge of the first valve body and the rim of the first valve seat gradually increases, the entire peripheral region of the first valve body is the first While moving into contact with the entire area of the rim of the valve seat and separating from the first valve seat, the entire rim of the first valve body is the rim of the first valve seat. The contact area between the peripheral edge of the first valve body and the mouth edge of the first valve seat gradually decreases from the state of being in contact with the entire area of the first valve body. The entire area of the peripheral portion is configured to shift to a state of being separated from the entire area of the port edge of the first valve seat , and the second valve body has a planar shape of the planar shape of the second valve seat. the combined O-ring is mounted on the outer peripheral surface with configured circular pillar, and when in contact with the second valve seat, the periphery of the second valve body The contact area between the peripheral edge of the second valve body and the peripheral edge of the second valve seat gradually gradually from a state in which only a part of the second valve seat is in contact with a part of the peripheral edge of the second valve seat When transitioning to a state in which the entire area of the peripheral edge of the second valve body is in contact with the entire area of the port edge of the second valve sheet through an increasing state, and when separating from the second valve sheet, From the state in which the whole area of the peripheral part of the second valve body is in contact with the whole area of the edge part of the second valve seat, the peripheral area of the second valve body and the mouth of the second valve sheet Through a state in which the contact area with the edge gradually decreases, the entire area of the peripheral portion of the second valve body is configured to shift to a state of being separated from the entire area of the port edge of the second valve seat. ing.

  A water purifier according to claim 2 comprises the flow path switching unit according to claim 1 and a filter material disposed in the discharge side flow path of any one of the two discharge side flow paths. There is.

In the flow path switching device according to claim 1 and the water purifier according to claim 2, one member (valve main body) configured by integrally forming the first valve body and the second valve body on the swinging member By swinging, the first valve seat and the second valve seat formed in the partition wall are opened and closed. Therefore, according to the flow path switching device and the water purifier, the number of components of the switching valve is reduced as compared with the conventional flow path switching device and the water purifier provided with the two separately formed valve bodies. The structure of the switching valve can be simplified. Further, according to this flow path switching device, when the first valve body is configured by mounting the O-ring on the outer peripheral surface of the circular column body, and the corresponding planar shape contacts the circular first valve seat Contact with the first valve seat (that is, only a part of the periphery of the first valve body contacts a part of the edge of the first valve seat) And then the contact area between the peripheral edge of the first valve body and the rim of the first valve seat gradually increases, and finally the entire peripheral region of the first valve body is It is possible to move into contact with the entire area of the lip of the valve seat. In addition, when the first valve body is separated from the corresponding first valve seat, conversely, the entire area of the peripheral portion of the first valve body is in contact with the entire area of the rim portion of the first valve seat From the state where the contact area between the peripheral edge of the first valve body and the edge of the first valve seat gradually decreases, the entire peripheral edge of the first valve body is the edge of the edge of the first valve seat. It is possible to shift to a state of being separated from the entire area. The same applies to the second valve body. According to this configuration, according to this water purifier, the entire area of the peripheral portion of the first valve body or the second valve body is in contact with the entire area of the rim of the first valve seat or the second valve seat substantially simultaneously Unlike the water purifier configured to be separated, occurrence of the water hammer phenomenon can be prevented.

FIG. 2 is an exploded perspective view of a water purifier 1 provided with a flow path switching device 2 and a cartridge 3; It is a top view of valve body VA and channel switching device 2 (upper case 24 of channel switching device 2). It is a W-W line sectional view of channel switching device 2 in Drawing 2, and a side view of valve body VA. FIG. 2 is a front view of the water purifier 1; It is XX sectional drawing of FIG. It is the side view seen from the switching lever 94 side of the water purifier 1. It is the YY sectional view taken on the line of FIG. FIG. 6 is a plan view of a valve main body VA in which a first valve body 74 and a second valve body 75 are integrally formed on a pivoting member 73. It is a side view of valve main body VA of FIG. It is ZZ line sectional drawing of FIG. It is the perspective view seen from diagonally upward of valve body VA. It is the perspective view seen from diagonally downward of valve body VA. It is an explanatory view (explanatory drawing showing the state where the 1st valve element 74 was made to contact the corresponding 1st valve seat 71) for explaining change operation of water purifier 1. FIG. It is explanatory drawing (explanatory drawing which shows the state which made the 2nd valve body 72 contact the 2nd valve seat 72 corresponding) for demonstrating the switching operation | movement of the water purifier 1. FIG.

  Hereinafter, an embodiment of a channel switching device and a water purifier including the channel switching device will be described with reference to the attached drawings.

  First, the configuration of the water purifier 1 will be described with reference to the drawings.

  A water purifier 1 as a water purifier shown in FIG. 1 includes a flow path switching device 2 and a replacement cartridge 3 (hereinafter, also referred to as a cartridge 3), and as shown in FIG. It is configured as a faucet direct connection type water purifier to be used "directly connected". Hereinafter, each structure of the flow path switching device 2 and the cartridge 3 will be described.

  First, the flow path switching device 2 will be described.

  The flow path switching device 2 includes a case portion 11 and a switching valve 12 as shown in FIG. 1 as an example. As an example in this example, the case portion 11 includes a cap screw 21, a faucet packing 22, a packing receptacle 23, an upper case 24, an annular packing 25, an O-ring 26 and a lower case 27.

  In this case, the cap screw 21 is formed in an annular shape as shown in FIG. 1 using a synthetic resin material, and as shown in FIGS. 5 and 7, the outer peripheral surface of the later described cylindrical portion 32 of the upper case 24. An internal thread is formed on the inner circumferential surface to be engaged with an external thread formed on the inner surface. When the cap screw 21 is externally fitted to the faucet 4 to which a C-ring-like attachment (not shown) is attached and screwed to the cylindrical portion 32 from this state, the faucet 4 is attached via the attachment. By pressing the faucet packing 22 attached to the cylindrical portion 32, the flow path switching device 2 is fixed to the faucet 4 as shown in FIG.

  The faucet packing 22 is formed in a disc shape using rubber, and a through hole 22a is formed at the center. The packing receptacle 23 is formed in a disk shape having a flat top surface, and a plurality of through holes 23a (see FIGS. 5 and 7) are formed in the central area A (see FIG. 1). Further, on the lower surface of the packing receiver 23, shaft pressers 23b and 23c (see FIGS. 1 and 7) for rotatably pressing a shaft 91 described later that constitutes a part of the switching valve 12 are formed sandwiching the central area A. In addition, a support cylindrical portion 23d (see FIGS. 1 and 5) is formed in which a support column 43 constituting a part of a support mechanism M described later is inserted.

  The upper case 24 is formed of a synthetic resin material as shown in FIGS. 1, 2 and 3 and has an outer shape as a cylindrical body (may be an elliptic cylindrical body or a rectangular cylindrical body) as an example, and the upper case 24 is A valve chamber 31 (in the present example, a valve chamber having a circular shape in plan view, for example) is formed and configured to open at a central portion of the upper surface of the case 24. In the valve chamber 31, as will be described later, a valve main body VA and a packing receptacle 23 which constitute a part of the switching valve 12 are accommodated. Further, on the upper surface of the upper case 24, a cylindrical tubular portion 32 having an outer peripheral surface formed with an external thread screwed with the internal thread of the cap screw 21 is formed so as to surround the opening of the valve chamber 31.

  Further, in the upper region of the outer peripheral surface of the upper case 24, an insertion hole 33 (a through hole reaching the valve chamber 31) is formed in which a shaft 91 described later constituting a part of the switching valve 12 is inserted. The lower region of the outer peripheral surface of the upper case 24 is smaller in diameter than the upper region, and can be fitted into the lower case 27. In the lower region of the outer peripheral surface of the upper case 24, the upper case 24 and the lower case 27 are engaged with a plurality of engaging claws 61 described later formed on the inner peripheral surface of the lower case 27. A plurality of engaging grooves 34 are formed which allow one to connect or separate them with one touch. Further, in the vicinity of the upper region in the lower region of the upper case 24, an annular groove 35 to which the O-ring 26 is attached is formed over the entire periphery of the lower region (see FIGS. 1 and 3) ).

  At the inner surface of the peripheral wall 31a constituting the valve chamber 31, as shown in FIGS. 1, 2 and 3, the upper end thereof abuts against the lower surface of the packing receiver 23 accommodated in the valve chamber 31 to Ribs 36 are formed to support in parallel with the inner surface of the bottom wall 31 b of the chamber 31 (hereinafter also referred to as the inner surface of the bottom wall). Further, as shown in FIGS. 2 and 3, the bottom wall 31 b of the valve chamber 31 is provided with a support mechanism M that pivotally supports a pivoting member 73 described later that constitutes a part of the switching valve 12. There is.

  The support mechanism M includes a recessed groove 41 formed on the inner surface of the bottom wall of the valve chamber 31, and a pair of guide walls 42 erected on one end side (left end side in FIGS. 2 and 3) of the inner bottom surface of the recessed groove 41. A support 43 erected on the other end side (right end side in FIGS. 2 and 3) of the inner bottom surface of the recessed groove 41, and a fulcrum portion 44 formed at a central portion of the inner bottom surface of the recessed groove 41; It is done.

  Specifically, the recessed groove 41 is linear along an imaginary straight line L1 passing through the center of the inner surface of the bottom wall of the valve chamber 31 formed in a circular shape in a plan view and slightly wider than the width of the pivoting member 73. Is formed. Further, the inner bottom surface of the recessed groove 41 is, as an example, a shape (a side surface facing the lower surface of the swinging member 73 (a surface facing the bottom wall inner surface of the valve chamber 31 (more specifically, the inner bottom surface of the recessed groove 41)) In accordance with the V-shaped shape), an inclined surface which gradually descends from the one end side where the guide wall 42 is formed toward the central portion where the fulcrum part 44 is formed, and the fulcrum part from the other end side where the support column 43 is formed The other slopes 44 are gradually lowered toward the formed central portion. In addition, the inner bottom face of the ditch | groove 41 is not limited to this structure, For example, the structure made into a flat flat as a whole is also employable.

  The pair of guide walls 42 are each formed in a rectangular parallelepiped shape, and are erected in parallel with each other at positions symmetrical with respect to the virtual straight line L1. The column 43 is formed in a column having a diameter smaller than the width of the recessed groove 41 (in the present example, a column although it may be a square column or the like), and is erected on the virtual straight line L1. The fulcrum portion 44 is formed of a rib having a uniform height rising from the inner bottom surface of the recessed groove 41 along a direction (width direction of the recessed groove 41) orthogonal to the imaginary straight line L1.

  Further, on the inner surface of the bottom wall of the valve chamber 31, as shown in FIGS. 2 and 3, a portion of the shaft 91 inserted from the insertion hole 33 of the upper case 24 into the valve chamber 31 is rotatably supported. Bearing portions 51 and 52 are formed. In this case, the shaft 91 is mounted on the upper case 24 along the direction orthogonal to the virtual straight line L1 and passing through the center of the inner surface of the bottom wall of the valve chamber 31 formed circularly in plan view. The portion entering the valve chamber 31 crosses above the recessed groove 41. For this reason, the bearing portions 51 and 52 are formed on a straight line sandwiching the recessed groove 41.

  The lower case 27 is a bottomed cylindrical body having substantially the same outer shape as the outer case of the upper case 24 as shown in FIG. 1 using a synthetic resin material (in the present example, it is a cylindrical body with a bottom, but the outer shape of the upper case 24 In accordance with the above, it is possible to form a bottomed elliptical cylinder or a bottomed rectangular cylinder. Further, in the upper region of the inner peripheral surface of the lower case 27, an engaging claw 61 is formed which engages with the engaging groove 34 formed in the lower region of the outer peripheral surface of the inserted upper case.

  In the middle region of the inner peripheral surface of the lower case 27, the cartridge 3 mounted on the lower case 27 is supported at a prescribed position, and between the outer peripheral surface of the cartridge 3 and the inner peripheral surface of the lower case 27. A plurality of support ribs 62 for forming a gap are formed. Each support rib 62 is a wall parallel to the length direction (vertical direction in FIG. 1) of the lower case 27 as shown in FIGS. It is configured as a stepped rib in which the projection length from the inner peripheral surface of the lower case 27 at the lower side portion is longer than the projection length from the surface. Further, as shown in FIG. 1, the support ribs 62 are disposed at equal angular intervals, for example, along the circumferential direction on the inner peripheral surface of the lower case 27.

  Further, as shown in FIGS. 5 and 7, a through hole 63 having a circular shape in plan view is formed in the central portion of the bottom wall of the lower case 27, and a region (an annular region as an example) surrounding the through hole 63. A plurality of small-diameter drainage ports (through holes) 64 for showers are formed in each.

  The switching valve 12 is juxtaposed apart along the length direction of the recessed groove 41 with the fulcrum portion 44 sandwiched by the inner surface of the bottom wall of the valve chamber 31 (specifically, the inner bottom surface of the recessed groove 41). The first valve seat 71 and the second valve seat 72 (see FIGS. 2 and 3), the swinging member 73, and the first valve body 74 and the second valve body 75 integrally formed on the swinging member 73, respectively. While having the valve body VA which has, it has also the drive mechanism DM which drives the valve body VA.

  An annular rib 76 (see FIG. 3) to which the annular packing 25 is attached is formed on the lower surface of the bottom wall 31b of the valve chamber 31. The first valve seat 71 is an annular rib 76 on the lower surface of the bottom wall 31b. It is opened in an area AR1 (also referred to as an inner area AR1) surrounded by With this configuration, when the cartridge 3 is mounted between the upper case 24 and the lower case 27 (cartridge mounted state), the first valve seat 71 and the internal space of the valve chamber 31 and the internal space SP1 of the cartridge 3 Communicate. Moreover, the planar shape of the 1st valve seat 71 is formed circularly.

  The second valve seat 72 opens in an area AR2 (also referred to as an outer area AR2) outside the annular rib 76 on the lower surface of the bottom wall 31b. With this configuration, the second valve seat 72 has a space SP2 sectioned by the lower surface of the bottom wall 31b of the valve chamber 31, the inner surface of the lower case 27, and the outer surface of the cartridge 3 in the cartridge mounted state. Communicate with the internal space. Moreover, the planar shape of the second valve seat 72 is circular.

  The swing member 73 constituting the valve main body VA is, for example, formed of a synthetic resin block bent in a V-shape at a central portion as shown in FIGS. 8 to 12. Further, on the one end side (the left end side in the same drawing) of the swinging member 73, a first protrusion 77 formed a little narrower than the distance between the pair of guide walls 42 of the support mechanism M is formed. Further, the swinging member 73 is formed with a pair of second protrusions 78 in parallel with each other on the other end side (the right end side in the figure). The distance between the pair of second protrusions 78 is formed slightly wider than the diameter of the support 43 of the support mechanism M.

  In addition, a concave groove 79 is formed along the width direction of the swinging member 73 in the mountain fold portion of the above-described U-shaped bent portion of the swinging member 73. Further, the first valve body 74 and the second valve body 75 are integrally formed on the surface of the rocking member 73 on the side where the concave groove 79 is formed (the lower surface in FIGS. 8 to 12) so that the concave groove 79 is sandwiched. Is formed. Specifically, the second valve body 75 is formed on the surface (lower surface) located on one end side of the swinging member 73 with reference to the recessed groove 79, and the surface (lower surface) located on the other end side of the swinging member 73 The first valve body 74 is formed on the lower side.

  The first valve body 74 is configured as a cylindrical body formed in a circular shape in accordance with the planar shape of the corresponding first valve seat 71. Further, the first valve body 74 is configured as a valve body capable of closing the first valve seat 71 in a highly watertight state by mounting the O-ring 74a on the outer peripheral surface thereof (see FIGS. 1 and 3) ing. The second valve body 75 is formed in a cylindrical body formed in a circular shape in accordance with the planar shape of the corresponding second valve seat 72. Further, the second valve body 75 is configured as a valve body capable of closing the second valve seat 72 in a highly water-tight state by mounting the O-ring 75a on the outer peripheral surface thereof (see FIGS. 1 and 3) ing.

  In addition, a pressing surface 80 pressed by the tip of a projection 92b of a cam 92 described later is applied to the surface (upper surface in FIGS. 8 to 12) of the above-described V-shaped bent portion of the swinging member 73 (upper surface in FIGS. Is formed. As shown in FIG. 10, the thickness of the pressing surface 80 at the portion where the pressing surface 80 is formed in the swinging member 73 is the thinnest at the portion near the recessed groove 79, and is separated from the portion near this. It is formed as a concave surface which gradually thickens according to.

  The drive mechanism DM includes a shaft 91, a cam 92, an O-ring 93, and a switching lever 94, as shown in FIGS. A cam attaching portion 91a (with which the cam 92 is attached (is externally fitted) is attached to the shaft 91 from the one end side inserted into the insertion hole 33 of the upper case 24 by the shaft pressing 23b of the packing receiver 23 as shown in FIG. (A part to be held down), a circumferential groove 91b held by the shaft press 23c of the packing receiver 23, a circumferential groove 91c to which the O-ring 93 is externally fitted, and a stopper 91d contacting the rim of the insertion hole 33 in the upper case 24 And a lever attachment portion 91e to which the switching lever 94 is attached.

  As shown in FIGS. 1 and 5, the cam 92 is a cylindrical body 92a into which the cam attachment portion 91a of the shaft 91 is inserted, and a part of the outer peripheral surface of the cylindrical body 92a parallel to the longitudinal direction of the cylindrical body 92a. A projection 92b is provided to project in the state. In this example, as shown in FIGS. 1 and 5, the cylindrical body 92a is configured as a cylindrical body having a D-shaped cross section in which a part of the cylindrical body is formed in a planar shape along the length direction. The cross-sectional shape of the cam attachment portion 91a of the shaft 91 is also formed in a D-shaped cross section in accordance with the shape of the cylindrical body 92a. In this example, this configuration allows the cam 92 to rotate integrally with the shaft 91 when the cam attachment portion 91a of the shaft 91 is inserted into the cylindrical body 92a of the cam 92 as shown in FIG. It has become.

  Next, the cartridge 3 will be described.

  The cartridge 3 includes, as shown in FIG. 1 as an example, a filter medium 101, a box 102 in which the filter medium 101 is accommodated from the open upper part, and a lid 103 attached to the open upper part of the box 102. Have. As shown in FIGS. 5 and 7, a cylindrical body 102a is integrally formed at the center of the outer surface of the bottom wall of the box 102, and the box at the center of the bottom wall and the center of the cylindrical body 102a. A drainage hole 102 b is formed to communicate the inside of the body 102 with the outside of the box 102. Further, as shown in FIGS. 5 and 7 in a state in which the cartridge 3 is stored in the lower case 27 between the bottom wall of the box body 102 and the bottom wall of the lower case 27 in which the cartridge 3 is stored, A mechanism for forming a gap between the outer surface of the bottom wall of the box 102 and the inner surface of the bottom wall of the lower case 27 is provided. In this example, as an example, this mechanism is constituted by an annular rib 65 formed on the inner surface of the bottom wall of the lower case 27 so as to surround the through hole 63, but instead of this configuration, it is not shown. Alternatively, a projection for forming a gap may be formed on the outer surface of the bottom wall of the box 102.

  As shown in FIGS. 1, 5 and 7, a liquid supply hole 103 a for communicating the inside of the box body 102 with the outside of the box body 102 is formed in the central portion of the lid body 103.

  In the cartridge 3 provided with the above components, the hole for communicating the inside and the outside of the cartridge 3 with the lid 103 attached to the upper portion of the box 102 is the liquid supply hole formed in the lid 103. It is only the drain hole 102 b formed in the box body 102 and the case 103 a. For this reason, the liquid supplied from the liquid supply hole 103 a into the cartridge 3 is discharged from the drainage hole 102 b to the outside of the cartridge 3 always via the filter material 101 stored in the cartridge 3.

  Subsequently, an assembly procedure of the water purifier 1 will be described with reference to the drawings.

  First, as shown in FIGS. 2 and 3, the valve body VA in which the O-rings 74 a and 75 a are attached to the valve bodies 74 and 75 of the swinging member 73 is a bottom wall of the valve chamber 31 of the upper case 24. It mounts | wears in the ditch | groove 41 formed in 31b. At this time, with the formation surfaces (lower surfaces) of the valve members 74 and 75 of the rocking member 73 facing the inner bottom surface of the recessed groove 41, the first projection 77 of the rocking member 73 is a pair of guide walls 42, the support post 43 is located between the pair of second projections 78 of the swinging member 73, and the tip end of the fulcrum 44 enters the recessed groove 79 of the swinging member 73. It is mounted in the concave groove 41. In this mounted state, the valve body VA is twisted because the first projection 77 at one end is guided by the pair of guide walls 42 and the second projection 78 at the other end is guided by the support column 43. It is possible to swing within the recessed groove 41 like a seesaw with the fulcrum portion 44 as a fulcrum in a state where there is little.

  Then, the O-ring 93 is externally fitted in the circumferential groove portion 91c, and the shaft 91 with the switching lever 94 attached to the lever attachment portion 91e is inserted into the insertion hole 33 of the upper case 24 from the cam attachment portion 91a side. Subsequently, with the cam attachment portion 91a reaching the inside of the valve chamber 31, the cam 92 is put into the valve chamber 31 and externally fitted to the cam attachment portion 91a. At this time, as shown in FIG. 5, the cam mounting portion 91a is inserted into the cylindrical body 92a while positioning the cam 92 so that the projection 92b contacts the pressing surface 80 of the swinging member 73, the cam 92 is Is externally fitted to the cam attachment portion 91a.

  Thereafter, the shaft 91 is inserted into the insertion hole 33 until the insertion is restricted by the stopper portion 91 d. In this state, as shown in FIG. 7, the tip end of the cam attachment portion 91 a reaches the bearing portion 51 formed on the inner surface of the bottom wall of the valve chamber 31. Thus, as shown in the figure, the shaft 91 is rotatably supported by bearings 51 and 52 formed on the inner surface of the bottom wall of the valve chamber 31 with the cam attachment portion 91a crossing above the recessed groove 41. Then, the upper case 24 is mounted.

  Subsequently, the packing receptacle 23 is mounted in the valve chamber 31. At this time, as shown in FIG. 5, the outer edge portion of the lower surface of the packing receiver 23 is a valve chamber in a state where the tip of the support column 43 is positioned so as to be inserted into the support cylindrical portion 23d formed in the packing holder 23. It mounts so that it may contact | abut in the upper end of the rib 36 formed in the surrounding wall surface of 31. FIG. Subsequently, the faucet packing 22 is pushed into the cylindrical portion 32 formed on the upper surface of the upper case 24, and the faucet packing 22 is disposed on the packing receptacle 23.

  In this state, as shown in FIG. 7, in the shaft 91, the tip end portion of the cam attachment portion 91a is rotatably held by the bearing portion 51 and the shaft pressing 23b of the packing receiver 23, and the circumferential groove portion 91b is a bearing It is in a state of being rotatably pressed by the portion 52 and the shaft pressing 23 c of the packing receptacle 23. Further, watertightness between the outer surface of the shaft 91 and the inner peripheral surface of the insertion hole 33 is secured by the O-ring 93 externally fitted in the circumferential groove portion 91 c of the shaft 91.

  Subsequently, the cartridge 3 is accommodated in the lower case 27 by inserting the cylindrical body 102 a formed in the cartridge 3 into the through hole 63 formed in the central portion of the bottom wall of the lower case 27. Subsequently, the engagement claws 61 of the lower case 27 and the engagement grooves 34 of the upper case 24 are engaged to connect the upper case 24 and the lower case 27 as shown in FIGS. Thereby, while the assembly of the flow-path switching device 2 is completed, the assembly of the water purifier 1 provided with the flow-path switching device 2 and the cartridge 3 is completed.

  Finally, as described above, the assembled water purifier 1 is directly connected to the faucet 4 as shown in FIG. 5 by using the cap screw 21 and a fixture (not shown) for attachment to the faucet 4. Do.

  In this state, in the water purifier 1 (in the flow path switching device 2), the through hole 22a formed in the faucet packing 22 is directly connected to the faucet 4 and supplied by the case portion 11 to which water is supplied from the faucet 4. It functions as a port (a supply port formed on the surface of the case portion 11). Further, the drainage hole 102 b formed in the cylindrical body 102 a of the cartridge 3 protruding from the through hole 63 formed in the bottom wall of the lower case 27 is the first discharge port in the case portion 11 (on the surface of the case portion 11 A plurality of drainage holes 64 for shower which are formed on the bottom wall of the lower case 27 and function as one formed discharge port) are formed on the surface of the case portion 11 (on the surface of the case portion 11). Act as one other outlet formed).

  Further, in the case portion 11, one supply side flow passage 201 and two flow paths constituting a flow passage for communicating the through hole 22a as the supply port with the drainage hole 102b and the drainage hole 64 as the drainage port. Discharge side flow paths 202 and 203 are formed.

  In this case, the supply side flow passage 201 is a flow passage formed of the through hole 22 a of the faucet packing 22, the plurality of through holes 23 a formed in the packing receptacle 23, and the valve chamber 31. In addition, one of the two discharge side flow paths 202 and 203, the discharge side flow path 202 includes the inner region of the annular packing 25, the liquid supply hole 103 a formed in the lid 103 of the cartridge 3, and the filter material 101. Of the valve chamber 31 that functions as a partition wall that divides one supply side flow path 201 and two discharge side flow paths 202 and 203 from each other. The first valve seat 71 formed in the bottom wall 31 b communicates with the drainage hole 102 b formed in the box 102 of the cartridge 3. Further, the other discharge side flow path 203 of the two discharge side flow paths 202 and 203 is a space divided by the lower surface of the bottom wall 31 b of the valve chamber 31, the inner surface of the lower case 27 and the outer surface of the cartridge 3 A second valve seat 72 formed in the bottom wall 31 b of the valve chamber 31 and a plurality of drainage holes 64 for a shower formed in the bottom wall of the lower case 27, which are flow paths configured by SP 2 and It is a flow path which makes it connect.

  Subsequently, operations of the flow path switching device 2 and the water purifier 1 will be described.

  First, when the switching lever 94 connected to the shaft 91 is rotated to the position shown in FIGS. 4 and 6 (the position shown by the solid line in FIG. 6), the projection of the cam 92 rotated with the shaft 91 As shown in FIG. 5, as shown in FIG. 13 which is a partially enlarged view of FIG. Further, in this state, as shown in FIG. 13, one end side of the valve body VA raised as described later abuts on the cam 92. As a result, the further elevation of the one end side of the valve body VA is restricted, and accordingly, the pivoting of the shaft 91 and hence the switching lever 94 further in the same direction is restricted.

  In this case, the contact point between the tip of the projection 92b and the pressing surface 80 formed on the swinging member 73 is the other end side of the valve main body VA (the swinging member 73) with reference to the recessed groove 79 contacting the fulcrum 44 The other end side of the) is the most moved position. As a result, the valve body VA is rocked by the cam 92 so that the other end is raised and the one end is lowered. For this reason, the valve body VA contacts the first valve seat 71 by contacting the first valve seat 71 with the first valve body 74 formed on the other end side of the lower surface, whereby the supply side flow path 201 and one side are closed. Communication with the discharge side flow passage 202 is blocked. Further, the valve body VA is configured such that the second valve body 75 formed on one end side of the lower surface separates from the second valve seat 72 and opens the second valve seat 72, thereby discharging the supply side flow path 201 and the other side. The side flow path 203 is communicated.

  As a result, the liquid (for example, water if the faucet 4 is for tap water) supplied from the faucet 4 to the inside of the water purifier 1 (that is, in the through hole 22a of the faucet packing 22) The water is discharged to the outside of the water purifier 1 from the plurality of drainage holes 64 for the shower via the other discharge side flow path 203.

  Next, when the switching lever 94 is rotated from the position shown by the solid line in FIG. 6 to the position shown by the two-dot chain line in FIG. As shown in 14, the valve main body VA is located at a position near one end side of the valve main body VA with reference to the fulcrum portion 44. Further, in this state, the other end side of the valve body VA raised as described later abuts on the cam 92. As a result, further ascent of the other end of the valve body VA is restricted, and in conjunction with this, further pivoting of the shaft 91 and hence the switching lever 94 in the same direction is restricted.

  In this case, the contact point between the tip of the projection 92 b and the pressing surface 80 formed on the swinging member 73 is one end side of the valve main body VA with reference to the recessed groove 79 contacting the fulcrum 44 (the swinging member 73 It is the position where it has moved the most in the direction (one end side). Thus, the valve body VA is swung by the cam 92 such that one end thereof is lowered and the other end is raised. Therefore, the second valve body 75 formed on one end side of the lower surface of the valve main body VA contacts the second valve seat 72 to close the second valve seat 72, whereby the supply side flow path 201 and the other Communication with the discharge side flow path 203 is shut off. Further, the valve body VA is separated from the first valve seat 71 by opening the first valve seat 71 by separating the first valve body 74 formed on the other end side of the lower surface from the first valve seat 71. The discharge side flow path 202 is communicated.

  As a result, the liquid supplied from the faucet 4 into the water purifier 1 (that is, into the through hole 22a of the faucet packing 22) passes through the supply side flow passage 201 and one discharge side flow passage 202, that is, The water is filtered by the filter material 101 disposed in the discharge side flow passage 202, and discharged from the drainage hole 102 b of the cartridge 3 to the outside of the water purifier 1.

  In this manner, in the water purifier 1, as described above, the switching lever 94 is pivoted to the position shown by the solid line in FIG. It is possible to switch the liquid supplied into the water purifier 1 to any one of a plurality of drainage holes 64 for shower and the drainage hole 102b and to discharge it.

  Further, in the water purifier 1, the first valve body 74 and the second valve body 75 are integrally formed on the valve body VA that swings with respect to the bottom surface 31 b of the valve chamber 31. When contacting the corresponding first valve seat 71, the contact starts in an inclined state with respect to the first valve seat 71 (that is, only a part of the peripheral portion of the first valve body 74) Contact is started from the state of contact with a part of the edge of the valve seat 71), and then the contact area between the peripheral edge of the first valve body 74 and the edge of the first valve seat 71 gradually increases Finally, the entire peripheral edge of the first valve body 74 is brought into contact with the entire peripheral edge of the first valve seat 71 through the state. In addition, when the first valve body 74 is separated from the corresponding first valve seat 71, conversely, the entire peripheral portion of the first valve body 74 contacts the entire area of the rim of the first valve seat 71. The entire area of the peripheral portion of the first valve body 74 is the first through a state in which the contact area between the peripheral portion of the first valve body 74 and the mouth edge of the first valve seat 71 gradually decreases. It shifts to a state of being separated from the entire area of the mouth edge of the valve seat 71. The same applies to the second valve body 75. With this configuration, in the water purifier 1, the entire area of the peripheral portion of the first valve body 74 or the second valve body 75 makes contact with the entire area of the rim of the first valve seat 71 or the second valve seat 72 substantially simultaneously. Unlike the water purifier configured to be separated at almost the same time, it is possible to prevent the occurrence of the water hammer phenomenon.

  As described above, in the water purifier 1 including the flow path switching device 2 and the flow path switching device 2 and the cartridge 3, the first valve body 74 and the second valve body 75 are integrally formed on the swinging member 73. The first formed on the bottom wall inner surface of the valve chamber 31 by swinging the valve main body VA formed as one member with the fulcrum portion 44 formed on the inner surface of the bottom wall of the valve chamber 31 as a fulcrum The valve seat 71 and the second valve seat 72 are opened and closed. Therefore, according to the flow path switching device 2 and the water purifier 1, the number of constituent members of the switching valve 12 is reduced as compared with the conventional flow path switching device provided with two separately formed valve bodies. The structure of the switching valve 12 can be simplified.

  In the above example, the cartridge 3 (the cartridge in which the filtering material 101 is contained) is accommodated in the flow channel switching device 2 and the flow channel switching device 2 is configured as the water purifier 1. Instead of the above, a through hole communicating with the first valve seat 71 is formed in the upper wall in close contact with the annular packing 25 like the box 102 and the lid 103 of the cartridge 3 and is in contact with the bottom wall of the lower case 27 The flow path switching device 2 is simply not provided with the water purification function by arranging a cylindrical member having a through hole communicating with the through hole 63 formed in the bottom wall of the lower case 27 on the lower wall of the lower case. It can also be configured as a flow path switching device.

1 Water purifier
2 channel switch
Reference Signs List 3 cartridge 12 switching valve 31 valve chamber 22 faucet packing 22a through hole 64, 102b drain hole 71 first valve seat 72 second valve seat 73 oscillating member 74 first valve body 75 second valve body 101 filter material 201 supply side Flow path 202, 203 Exhaust side flow path VA valve body

Claims (2)

A case portion having a supply port connected to the faucet and two discharge ports disposed on the surface, and a flow passage for communicating the supply port and the two discharge ports formed therein; Of the two discharge side flow paths as a part of the flow path separately communicating with the two discharge ports, the supply side flow path as a part of the flow path being disposed in communication with the supply port The fluid supplied to the inside of the supply side flow path from the faucet through the supply port is switched to the desired one discharge side flow path through the communication port through the desired one discharge side flow path A flow path switching device comprising: a switching valve for discharging from one of the two discharge ports in communication with a desired one discharge side flow path,
The switching valve is disposed on a partition wall that divides the supply side flow path and the two discharge side flow paths, and one discharge side flow of the supply side flow path and the two discharge side flow paths is provided. A first valve seat communicating with the passage, and the first valve seat disposed in parallel with the partition wall, the supply passage and the other discharge passage of the two discharge passages; A plane parallel to the juxtaposing direction of the first valve seat and the second valve seat with the second valve seat to be communicated and the part of the partition wall between the first valve seat and the second valve seat as a fulcrum A first valve body formed at a portion on the first valve seat side in a surface opposed to the swinging member disposed inside so as to be swingable and the swinging member on the first valve seat and the opposite surface And a second valve body formed at a portion on the second valve seat side, and when the swinging member swings to the first valve seat side, the first valve body is Note that the first valve seat is in contact with the supply side flow path and the one discharge side flow path, and the second valve body is separated from the second valve seat, and the supply side flow path and the second valve body are separated. The first valve body is separated from the first valve seat when the swing member is caused to communicate with the other discharge side flow path and the swing member swings to the second valve seat side, and the supply side flow path In the flow path switching device, which communicates with one discharge side flow path, and the second valve body contacts the second valve seat to shut off the supply side flow path and the other discharge side flow path,
The first valve seat and the second valve seat are each formed in a circular planar shape,
The first valve body is configured as a circular column whose plane shape matches the plane shape of the first valve seat, and an O-ring is mounted on the outer peripheral surface , and when the first valve body contacts the first valve seat From the state where only a part of the peripheral part of the first valve body contacts a part of the rim part of the first valve seat, the peripheral part of the first valve body and the relevant part of the first valve seat Through a state in which the contact area with the mouth edge gradually increases, the entire area of the peripheral edge of the first valve body is brought into contact with the entire area of the mouth edge of the first valve seat, and Since the whole area of the peripheral portion of the first valve body is in contact with the whole area of the port edge of the first valve seat when separating from the first valve seat, the peripheral area of the first valve body Through a state in which the contact area between the valve part and the mouth edge of the first valve seat gradually Is configured to transition to a state away from the entire region of the opening edge portion of the first valve seat,
The second valve body is configured as a circular column whose plane shape matches the plane shape of the second valve seat, and an O-ring is attached to the outer peripheral surface , and when the second valve body contacts the second valve seat From the state where only a part of the peripheral portion of the second valve body contacts with a part of the rim of the second valve seat, the peripheral portion of the second valve body and the second valve seat Through a state in which the contact area with the mouth edge gradually increases, the entire area of the peripheral edge of the second valve body is brought into contact with the entire area of the mouth edge of the second valve seat, and Since the whole area of the peripheral part of the second valve body is in contact with the whole area of the rim of the second valve seat when moving away from the second valve seat, the peripheral area of the second valve body Through a state in which the contact area between the valve part and the mouth edge of the second valve seat gradually Channel switching device that is configured to transition to a state away from the entire region of the opening edge portion of the second valve seat.   The water purifier provided with the flow-path switching device of Claim 1, and the filter material arrange | positioned in the discharge side flow path any one of these two discharge side flow paths.

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