JP4502727B2 - Hot water tap - Google Patents

Description

  The present invention relates to a hot and cold water mixing tap installed in a bathroom or the like.

  Hot water mixer taps are installed nationwide in bathrooms and bathroom vanities, etc., but hot water mixer taps installed in cold regions can be damaged by freezing during winter nights. In order to prevent this, it is necessary to drain the water remaining in the hot and cold water mixing tap. For this reason, the conventional hot and cold water mixing tap is provided with a draining means for discharging the residual water inside (for example, refer to Patent Document 1).

  The hot and cold water mixing tap described in Patent Document 1 has a hot water chamber and a water chamber partitioned by a partition in the faucet body, and discharges the water in the hot water chamber and the water chamber to the outside. A water draining device is provided in a state protruding from the faucet body.

JP-A-8-270834

  The hot and cold water mixing plug described in Patent Document 1 selectively mixes water and hot water supplied from outside at an arbitrarily set ratio, and selectively supplies water and hot water to different locations such as a currant or shower. Since it has a function, the inside is divided into a plurality of regions by partition walls or the like, and these regions are not all in communication. Therefore, it is impossible to discharge the residual water in the hot and cold mixing tap with one draining device.

  For this reason, in the hot and cold water mixing tap described in Patent Document 1, it is necessary to provide draining devices at a plurality of locations of the faucet body, which takes time. In addition, since it is necessary to perform a draining operation on each of the plurality of draining devices, a lot of time and labor are spent on these draining operations in winter when the draining operation is required every day. .

  The problem to be solved by the present invention is to provide a hot and cold water mixing tap having a simple structure and extremely easy to drain water.

The invention of claim 1 is a temperature adjusting means for mixing water and hot water supplied from the outside, a mixing chamber into which hot water supplied from the temperature adjusting means flows, and a plurality of water supply paths for supplying hot water in the mixing chamber. A plurality of on-off valves provided for distributing to any of the above, and water supply chambers provided respectively downstream of the plurality of on-off valves,
A plurality of communication ports communicating the mixing chamber and the plurality of water supply chambers;
A drain opening established in one of the mixing chamber and the plurality of water supply chambers;
A drain plug for commonly opening and closing the plurality of communication ports and the drain port;
Is provided.

  With such a configuration, by opening one drain plug, it is possible to open a plurality of communication ports and drainage ports in common, and discharge residual hot water in the mixing chamber and the plurality of water supply chambers at the same time. Therefore, the water draining operation is very easy with a simple structure. The term “water” is used in the terms of “water supply chamber”, “drain outlet”, and “drain plug” described above, but the target to be supplied, discharged, or removed is limited to water. It has a broad meaning that includes everything from water to hot water.

  According to a second aspect of the present invention, any one of the mixing chamber and the plurality of water supply chambers is disposed at a lowermost portion, and the other chambers are adjacent to an upper portion of the chamber disposed at the lowermost portion. It is characterized by having arranged. With this configuration, the remaining hot water from the other chambers can flow into the room located at the bottom and can be discharged from the drain opening established at the bottom room. In addition to smoothing the flow, the structure can be simplified and the draining operation can be facilitated.

According to a third aspect of the present invention, the plurality of communication ports and the drainage ports are disposed so that the respective shaft centers of the plurality of communication ports and the shaft centers of the drainage ports are parallel to each other, The drain plug is disposed so as to be opened and closed by penetrating the drain port and the plurality of communication ports can be opened and closed.

  With such a configuration, it is possible to open and close the drain port and the plurality of communication ports by moving the drain plug penetrating the drain port in the axial direction of the drain port, so that the structure is simple. It is possible to form a water draining mechanism that is easy to operate. In addition, since the axis of each of the plurality of communication ports and the axis of the drain port are parallel to each other, the residual hot water discharged through the plurality of communication ports is smoothly guided to the drain port. can do.

  According to the present invention, it is possible to provide a hot and cold water mixing tap having a simple structure and extremely easy to drain water.

  Hereinafter, a hot and cold water mixing plug according to an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view showing a state in which a faucet device incorporating a hot and cold mixing tap according to an embodiment of the present invention is installed in a bathroom, FIG. 2 is a perspective view of the faucet device shown in FIG. 1, and FIG. 4 is an exploded perspective view showing the hot-water mixing tap built in the water faucet device shown in FIG. 4, FIG. 4 is a front view showing the hot-water mixing tap built in the water tap device shown in FIG. 2, and FIG. Sectional drawing and FIG. 6 are the elements on larger scale of FIG.

  In the present embodiment, as an example, as shown in FIG. 1, a faucet device 1 in which a hot and cold mixing tap 10 (see FIG. 3) is built is installed on a wall surface W of a bathroom. Two operation keys 2 and 3 are arranged in two upper and lower stages on the front portion of the faucet device 1, and a temperature adjustment dial 4 is arranged on the upper side surface of these operation keys 2 and 3. When the operation key 2 is pressed, water discharge and water stop from the currant 5 are alternately repeated, and when the operation key 3 is pressed, water discharge and water stop from the shower 6 are alternately repeated. The temperature of the hot water discharged from the currant 5 and the shower 6 can be set by rotating the temperature adjustment dial 4.

  As shown in FIGS. 2 and 3, the water faucet device 1 includes a hot and cold water mixing tap 10 and a cover 9 that covers the tap. The hot-water mixing plug 10 has a faucet body 14 having a function of mixing hot water supplied from the hot-water supply pipe 11 and water supplied from the water-supply pipe 12 so as to reach a temperature set by the temperature adjustment dial 4. The on-off valve unit 7 for opening and closing the flow path to the currant 5 and the on-off valve unit 8 for opening and closing the flow path to the shower 6 are provided.

  The on-off valve units 7 and 8 are called pilot-type on-off valve devices. On the upper part of each of the on-off valve units 7 and 8 are operating units 7a and 7a for operating on-off valves (not shown) built in the on-off valve units 7 and 8, respectively. 8a is provided. In the present embodiment, pilot type on / off valve devices are used as the on / off valve units 7 and 8. However, the present invention is not limited to this, and other types of on / off valve units having similar functions are used. It is also possible. The structure and function of the on-off valve units 7 and 8 will be described in detail with reference to FIGS.

  As shown in FIG. 3, the cover 9 includes a front cover 9 a that covers the front portion of the hot and cold water mixing tap 10, and side covers 9 b and 9 c that cover the left and right portions thereof. Further, in order to perform the opening / closing operation by pressing the operation parts 7a, 8a of the opening / closing valve units 7, 8, the operation keys 2, 3 can be raised and lowered in the two openings 9s, 9t opened in the front cover 9a, respectively. The upper surface of the front cover 9a is a so-called operation panel.

  As shown in FIGS. 4 and 5, the hot water supply pipe 11 and the water supply pipe 12 piped vertically below the hot and cold water mixing tap 10 are connected to the faucet body 14 via a stop cock 23 and a check valve 24, respectively. It is connected. A water supply path 16 to the shower 6 is connected to a water supply chamber 18 on the downstream side of the on-off valve unit 8 located below the faucet body 14, and a current is supplied to the water supply chamber 17 on the downstream side of the on-off valve unit 7 located below it. A water supply path 15 to 5 is connected.

  The check valve 24 is a member for preventing water from flowing back into the hot water channel (hot water supply pipe 11) and hot water from flowing back into the water flow channel (water supply pipe 12). A filter (not shown) for capturing and removing foreign substances mixed in hot water or water is accommodated. The stop cock 23 is a member for closing the hot water flow path (hot water supply pipe 11) and the water flow path (water supply pipe 12) when cleaning the filter in the check valve 24 or performing maintenance. .

  As shown in FIG. 5, the hot and cold mixing tap 10 includes a faucet body 14 which is a temperature adjusting means for mixing water and hot water supplied from the outside, and a mixing chamber into which hot water supplied from the faucet body 14 flows. 13, a plurality of on-off valve units 7, 8 provided for distributing hot water in the mixing chamber 13 to any one of the plurality of water supply paths 15, 16, and downstream of the plurality of on-off valve units 7, 8. A plurality of water supply chambers 17 and 18 are provided.

  A plurality of communication ports 19 and 20 for communicating the mixing chamber 13 and the plurality of water supply chambers 17 and 18 with each other, a drain port 21 established in the water supply chamber 17, a plurality of communication ports 19 and 20 and a drain port And a drain plug 22 for opening and closing the common 21. The drain plug 22 is screwed to the drain port 21 by a screw mechanism, and a sealing material 22a is attached to the upper end thereof.

  If the drain plug 22 is rotated forward and backward about its axis, it rises and descends along the axis, and when the reduced diameter portion 22b of the drain plug 22 is located at the drain 21, the drain 21 is When the large-diameter portion 22c is located at the drain port 21, the drain port 21 is closed. At the same time, the communication ports 19 and 20 are opened when the sealing material 22a is separated from the communication ports 19 and 20, and the communication ports 19 and 20 are closed when the sealing material 22a comes into contact therewith.

  Here, with reference to FIG. 1, FIG. 5, the basic function of the hot-water mixing tap 10 is demonstrated. As described above, when the operation key 2 is pressed, the operation portion 7a of the on-off valve unit 7 is pressed and the flow path to the currant 5 is opened and closed. When the operation key 3 is pressed, the operation portion 8a of the on-off valve unit 8 is pressed and showered. 6 is opened and closed.

  When the operation key 2 is pressed while the currant 5 and the shower 6 are in the water-stopped state, the operation portion 7a is pressed, and the main valve 46 (see FIGS. 7 to 9) in the on-off valve unit 7 is opened. The hot water flowing into the mixing chamber 13 from 14 flows into the opening / closing valve unit 7 from the four openings 7 b provided in the lower part of the opening / closing valve unit 7, is then discharged to the water supply chamber 17, and passes through the water supply path 15. Water is discharged from Karan 5. Thereafter, when the operation key 2 is pressed again, the main valve 46 in the on-off valve unit 7 is closed, and water discharge from the currant 5 is stopped.

  On the other hand, when the operation key 3 is pressed while the currant 5 and the shower 6 are in the water stop state, the operation portion 8a is pressed, and the main valve 46 (see FIGS. 7 to 9) in the on-off valve unit 8 is opened. Hot water flowing into the mixing chamber 13 from the plug body 14 flows into the opening / closing valve unit 8 from the four openings 8b provided in the lower part of the opening / closing valve unit 8, is then discharged to the water supply chamber 18, and passes through the water supply path 16. Then, water is discharged from the shower 6. Thereafter, when the operation key 3 is pressed again, the main valve 46 in the on-off valve unit 8 is closed, and water discharge from the shower 6 is stopped.

  By the way, when the currant 5 and the shower 6 are in a water-stopped state, the interior of the mixing chamber 13 and the water supply chambers 17 and 18 is filled with hot water, so that the hot-water mixing tap 10 is frozen at night in winter. In order to prevent breakage, it is necessary to remove hot water remaining in the hot water mixing tap 10. Therefore, in the hot and cold water mixing tap 10 of the present embodiment, as described above, a water draining mechanism including the communication ports 19 and 20, the drain port 21, and the drain plug 22 is provided.

  When the drain plug 22 in the state shown in FIG. 5 is reversed (rotated in the loosening direction) and moved downward in the axial center, the reduced diameter portion 22b of the drain plug 22 becomes the drain port 21 as shown in FIG. At the same time as the drain port 21 is opened, the sealing material 22a is separated from the communication ports 19 and 20, and the communication ports 19 and 20 are opened. Thus, by opening one drain plug 22, it is possible to open the two communication ports 19, 20 and the drain port 21 in common, whereby the inside of the mixing chamber 13 and the water supply chamber 17, Since the residual water in 18 can be discharged simultaneously, the structure is simple and the water draining operation is extremely easy.

  When draining is completed, when the drain plug 22 is rotated forward and moved above its axial center, the large diameter portion 22c of the drain plug 22 is positioned at the drain port 21 as shown in FIG. At the same time as 21 is closed, the sealing material 22a comes into contact with the communication ports 19 and 20, and the communication ports 19 and 20 are closed. The water on the upstream side of the check valve 23 (see FIG. 4) can be discharged by opening a drain plug (not shown) disposed in the house.

  In the hot and cold water mixing tap 10 of the present embodiment, the communication ports 19 and 20 and the drain port 21 are disposed so that the axis of the communication ports 19 and 20 and the axis of the drain port 21 are parallel to each other, A drain plug 22 is arranged so that the communication ports 19 and 20 can be opened and closed by moving through and opening the drain port 21.

  Accordingly, it is possible to open and close the drain port 21 and the communication ports 19 and 20 by moving the drain plug 22 penetrating the drain port 21 in the axial direction of the drain port 21, and the operation can be performed with a simple structure. Is also easy. In addition, since the axial centers of the communication ports 19 and 20 and the axial center of the drain port 21 are parallel to each other, residual hot water that flows into the water supply chamber 17 through the communication ports 19 and 20 during drainage. Can be smoothly guided to the drain port 21 and discharged to the outside.

  Further, in the hot-water mixing tap 10, a water supply chamber 17 that is one of a plurality of chambers is disposed at the lowermost portion, and a water supply chamber 18 that is the other chamber is disposed above the water supply chamber 17 disposed at the lowermost portion. Mixing chambers 13 are arranged adjacent to each other. Accordingly, the remaining hot water in the water supply chamber 18 and the mixing chamber 13 can be made to flow toward the water supply chamber 17 disposed at the lowermost portion, and then discharged from the drain port 21 established in the water supply chamber 17. For this reason, not only the flow at the time of residual hot water discharge is smoothed, but also simplification of the structure and facilitation of draining operation can be achieved.

  Next, with reference to FIGS. 7-10, the structure, function, etc. of the on-off valve units 7, 8 will be described in detail. Since the on-off valve units 7 and 8 have the same structure, the on-off valve unit 7 will be described here. 7 is a schematic view showing the basic structure of the on-off valve unit constituting the hot-water / water mixing tap shown in FIG. 3, etc., FIG. 8 is a cross-sectional view showing the on-off valve unit in a water stop state (closed state), and FIG. FIG. 10 is a cross-sectional view showing the on-off valve unit in the state (open state), and FIG. 10 is a view showing a pilot valve switching holding mechanism (heart cam mechanism) that constitutes the on-off valve unit.

  As shown in FIG. 7, the on-off valve unit 7 includes an operation unit 7 a that is pressed downward by the user pressing the operation key 2 for the currant 5, and a push rod having a base end coupled to the operation unit 7 a. 38 and a pilot valve 40 provided at the tip of the push rod 38, and a coil spring 42 as a buffer means is provided between the tip (lower end) of the push rod 38 and the pilot valve 40.

  The on-off valve unit 7 includes a pilot valve port (pressure release hole) 44 below the pilot valve 40, a diaphragm type main valve 46 in which the pilot valve 40 abuts and disengages from the pilot valve port 44, and the main valve 46. A housing 50 is formed on the back surface of the valve 46 for forming a pressure chamber 48 for accommodating the push rod 38, the pilot valve 40 and the coil spring 42, and a valve seat 52 on which the surface of the main valve 46 is seated and separated. I have. A seal member 54 is provided at a portion of the housing 50 where the push bar 38 is inserted. Further, a small hole (primary pressure inlet) 56 is formed on the outer peripheral side of the main valve 46.

  Next, the basic operation of the on-off valve unit 7 will be described. In the on-off valve unit 7, the pilot valve 40 provided in the pressure chamber 48 is brought into contact with and dissociated from the pilot valve port 44 of the main valve 46, thereby opening and closing the pilot valve 40, so that the water stop state and the water discharge state And are to be switched.

  When switching from the water discharge state to the water stop state, the pilot valve 40 must be pushed by the push rod 38 in the direction in which the pilot valve 40 abuts the pilot valve port 44. At this time, the push bar 38 receives an upward force due to the water pressure acting on the area corresponding to the cross-sectional area thereof, and further has a sliding frictional resistance due to the seal member 54. It is necessary to push the operation portion 7a against these. However, this operating force is a relatively small value.

  Next, when the pilot valve 40 comes into contact with the pilot valve port 44 of the main valve 46, the primary pressure water in the primary side water passage flows into the pressure chamber 48 through the small hole 56, and accordingly, the main valve 46. Moves toward the valve seat 52 at a slow speed. As a result, the main valve 46 is seated on the valve seat 52 and switched to the water stop state (see FIG. 8).

  Further, in the on-off valve unit 7, the coil spring 42 as a buffer means is provided between the push rod 38 and the pilot valve 40, that is, in the pressure chamber 48. The force does not act until it abuts on the pilot valve port 44. Further, as will be described in detail later, a small force may be applied after the pilot valve 40 abuts on the pilot valve port 44.

  On the other hand, when switching from the water stop state to the water discharge state, if the operation portion 7a is pushed, the pilot valve 40 is connected to the pilot valve port (pressure release) of the main valve 46 by a pilot valve switching holding mechanism 62 and an urging spring 68 described later. The pressure chamber 48 is opened, the main valve 46 is disengaged from the valve seat 52, and a water discharge state is entered (see FIG. 9).

  In the on-off valve unit 7, as described above, the moving speed of the main valve 46 is intentionally reduced, but this is to suppress the occurrence of water hammer when the main valve 46 is closed. That is, when the primary water flows into the pressure chamber 48 from the small hole 56 provided in the main valve 46, the pressure chamber 48 is filled with the primary pressure water, and the main valve 46 moves toward the valve seat 52. However, since the small hole 56 usually has a very small diameter, the flow rate of water into the pressure chamber 48 can be suppressed, thereby suppressing the moving speed (closing speed) of the main valve 46 and closing the main valve. The generation of water hammer is suppressed.

  As described above, FIG. 8 is a cross-sectional view showing the on-off valve unit in the water stop state (closed state), and FIG. 9 is a cross-sectional view showing the on-off valve unit in the water discharge state (open state). As shown in FIG. 8, the on-off valve unit 7 includes a diaphragm-type main valve having an operation portion 7 a, a push rod 38, a pilot valve 40, a coil spring 42 as a buffer means, and a pilot valve port (pressure release hole) 44. 46, a housing 50 (50a, 50b) for forming the pressure chamber 48, a valve seat 52, a seal member 54, and a small hole 56 are provided.

  A cleaning pin 58 is inserted into the small hole (primary pressure inlet) 56 described above, and the water flow area of the primary pressure inlet of the small hole 56 is reduced. Accordingly, as described above, the closing speed of the main valve 46 is moderated by suppressing the inflow speed of the primary pressure into the pressure chamber 48, and the water hammer generated at the closing time can be reduced.

  The housing 50 forming the pressure chamber 48 includes a first housing 50 a that mainly surrounds a space in which the pilot valve 40 is disposed, and a second housing 50 b that surrounds a space on the back side of the main valve 46. Also, an assembly nut 60 for assembling the on-off valve unit 7 is disposed on the outermost peripheral side by assembling four parts, that is, the operation portion 7a, the first housing 50a, the second housing 50b, and the valve seat 52. Yes.

  Further, the on-off valve unit 7 includes a pilot valve switching holding mechanism 62. The pilot valve switching holding mechanism 62 is linked to the operation key 2 described above, and every time the operation key 2 is pressed, that is, every time the operation portion 7a is pressed by the operation key 2, the water discharge state of the pilot valve 40 The function of repeatedly switching the position and the water stop state position and holding the pilot valve 40 at the water discharge state position or the water stop state position is provided.

  The pilot valve switching / holding mechanism 62 may be a mechanism generally used in a knock type ballpoint pen knock mechanism or the like, but in the present embodiment, as shown in FIGS. 8 and 9, the pilot valve switching / holding mechanism 62 moves in conjunction with the operation unit 7a. The pin 64 that is formed on the outer peripheral surface of the first housing 50a, the cam groove 66 having an inverted heart shape that moves along the elastic deformation of the lower side of the pin 64, and the pin 64 in a water stop state (closed state). A heart cam mechanism formed by a holding projection 68 for holding the lens is employed.

  Here, the pilot valve switching holding mechanism (heart cam mechanism) 62 will be described in detail with reference to FIG. FIG. 10 is an enlarged view showing a pilot valve switching holding mechanism (heart cam mechanism) employed in the on-off valve unit 7.

  As shown in FIG. 10, each time the user presses the operation key 2, the lower end portion 64 a of the pin 64 is moved to a position (water stop state), b position (pressed state), c position (water discharge position), It moves according to the order of d position (pressed state). In the a position (water-stopped state), the lower end portion 64a of the pin 64 is held by the holding projection 68, and the water-stopped state is thereby maintained. Next, when the water discharge operation is performed from the water stop state to the water discharge state, the lower end portion 64a of the pin 64 moves along the shape of the cam groove 66 and falls to the b position (pressed state), and then the c position (water discharge state). The water discharge state is maintained at this position. Next, when the water stop operation is performed from the water discharge state to the water stop state, the lower end portion 64a of the pin 64 moves along the shape of the cam groove 66 from the c position (water discharge state), drops to the d position (push state), and thereafter , A position (water discharge state), the water stop state is maintained at this position.

  As described above, since the pilot valve switching holding mechanism 62 is a heart cam mechanism, only the reciprocating motion (vertical motion) of the push rod 38 acts on the seal member 54 that seals the pressure chamber 48, as in the above-described knock mechanism. Since the rotational mobility of the push rod 38 does not act, the burden on the seal member 54 is reduced, and high reliability can be obtained.

  Further, as shown in FIGS. 8 and 9, when the operation is switched from the water stop state to the water discharge state by the biasing spring 69, that is, when the operation key 2 is pressed, the water stop by the pilot valve switching holding mechanism 62 is performed. The holding at the state position is released, the operation portion 7a is biased upward, the pilot valve 40 is disengaged from the pilot valve port (pressure release hole) 44, and can be easily switched to the water discharge state.

  Next, the connecting portion between the push rod 38 and the pilot valve 40 will be described. As shown in FIGS. 8 and 9, the movement distance (displacement amount) in the stroke direction of the push rod 38 is absorbed in the pressure chamber 48 at the tip (lower end) of the push rod 38 as described above. A coil spring 42 which is a buffer means is provided. A large diameter portion 38 a is formed at the tip (lower end) of the push rod 38, and a packing 40 a is attached to the tip of the pilot valve 40. The pilot valve 40 has a hollow portion 40b, and a coil spring 42 is built in the hollow portion 40b.

  An insertion hole 40c into which the push rod 38 is slidably inserted is formed above the pilot valve 40. The pilot valve 40 is formed of an elastically deformable resin material. When the pilot valve 40 is assembled, the push rod 38 is inserted into the insertion hole 40c while the pilot valve 40 is deformed, and the large portion of the push rod 38 is inserted into the hollow portion 40b. The diameter portion 38a is accommodated. Here, the coil spring 42 urges the push rod 38 and the pilot valve 40 in a direction to separate them.

  Thereby, at the time of water discharge operation to switch from the water stop state to the water discharge state, the large diameter portion 38a at the tip of the push rod 38 and the upper side of the pilot valve 40 are engaged by the urging force of the coil spring 42. Moves away from the pilot valve port 44 formed in the main valve 46 in conjunction with the movement of the push rod 38 (see FIG. 9).

  On the other hand, at the time of the water stop operation to switch from the water discharge state to the water stop state, the pilot valve 40 contacts the pilot valve port 44 formed in the main valve 46, and the large diameter portion 38 a of the push rod 38 is separated from the upper side of the pilot valve 40. However, the moving distance (displacement amount) of the push rod 38 in the stroke direction is absorbed by the coil spring 42 (see FIG. 8).

  In this way, there is a difference in operating force in both the process until the pilot valve 40 abuts on the pilot valve port 44 during the water stop operation and the process after the pilot valve 40 abuts on the pilot valve port 44 ( Unevenness) is eliminated, and a favorable operational feeling can be obtained.

It is a perspective view which shows the state which installed the faucet device incorporating the hot-water / water mixing tap which is embodiment of this invention in the bathroom. It is a perspective view of the water faucet device shown in FIG. It is a disassembled perspective view which shows the hot / cold water mixing stopper incorporated in the water faucet device shown in FIG. It is a front view which shows the hot / cold water mixing stopper built in the water stopper apparatus shown in FIG. It is the sectional view on the AA line in FIG. It is the elements on larger scale of FIG. It is the schematic which shows the basic structure of the on-off valve unit which comprises the water faucet apparatus shown in FIG. It is sectional drawing which shows the on-off valve unit in a water stop state (closed state). It is sectional drawing which shows the on-off valve unit in a water discharging state (open state). It is a figure which shows the pilot valve switching holding | maintenance mechanism (heart cam mechanism) which comprises an on-off valve unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water faucet device 2,3 Operation key 4 Temperature adjustment dial 5 Callan 6 Shower 7,8 On-off valve unit 7a, 8a Operation part 7b, 8b Opening 9 Cover 9a Front cover 9b, 9c Side cover 9s, 9t Opening 10 Hot water mixing plug 11 Hot water supply pipe 12 Water supply pipe 13 Mixing chamber 14 Water faucet body 15, 16 Water supply path 17, 18 Water supply chamber 19, 20 Communication port 21 Drain port 22 Drain plug 22 a Seal material 22 b Reduced diameter portion 22 c Large diameter portion 23 Stop valve 24 Check valve 38 Push rod 38a Large diameter portion 40 Pilot valve 40a Packing 40b Hollow portion 40c Insertion hole 42 Coil spring 44 Pilot valve port (pressure release hole)
46 Main valve 48 Pressure chamber 50 Housing 50a First housing 50b Second housing 52 Valve seat 54 Seal member 56 Small hole (primary pressure inlet)
58, 64 pin 60 assembly nut 62 pilot valve switching holding mechanism 64a lower end 66 cam groove 68 holding projection 69 biasing spring

Claims (3)

A temperature adjusting means for mixing water and hot water supplied from the outside, a mixing chamber into which hot water supplied from the temperature adjusting means flows, and hot water in the mixing chamber for distributing to one of a plurality of water supply paths A plurality of on-off valves provided in the water supply chambers provided on the downstream side of the plurality of on-off valves,
A plurality of communication ports communicating the mixing chamber and the plurality of water supply chambers;
A drain opening established in one of the mixing chamber and the plurality of water supply chambers;
A drain plug for commonly opening and closing the plurality of communication ports and the drain port;
A hot and cold water mixing tap.   One of the mixing chamber and the plurality of water supply chambers is disposed at a lowermost portion, and the other chamber is disposed adjacent to an upper portion of the chamber disposed at the lowermost portion. Item 1. A hot and cold water mixing tap according to item 1. The plurality of communication ports and the drain port are disposed so that the respective axis centers of the plurality of communication ports and the shaft center of the drain port are parallel to each other, and the drain ports are moved through and opened and closed. claim 1 or 2 mixer tap according to, characterized in that arranged the draining plug the plurality of communication openings in openable state with.

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