JP2010014128A - Valve of faucet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve of a faucet capable of maintaining an excellent water cut-off state by maintaining a main valve in a valve closing state with a specific force after closing of the valve, and of preventing excessive operation force from being applied to the main valve after closing the valve. <P>SOLUTION: This valve of the faucet has the main valve 20, a handle side rotary member 28 and an advance-retreat member 42 for moving the main valve 20 by advancing-retreating by a screw feed in the axial direction by rotation of the rotary member 28. A shock absorbing spring mechanism 54 is arranged for absorbing the further advance movement of the advance-retreat member 42 after closing the main valve 20 by deflecting a shock absorbing spring 56 between the advance-retreat member 42 and the main valve 20. A rotation preventive mechanism 48 of the advance-retreat member 42 has engaging claws 64 and 66 and guide grooves 68 and 70, and integrally idly rotates the advance-retreat member 42 with the rotary member 28 by releasing the rotation preventive action after the advance-retreat member 42 advances by a specific stroke after closing the main valve 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a faucet valve, and more particularly to a faucet valve that can lighten the operation after the main valve is closed.

  Conventionally, as a valve for a faucet, (a) a first main valve that is provided inside a valve case, moves forward and backward toward the first main valve seat to change the valve opening, and (b) a rotating member on the handle side. (C) The screw is coupled to the rotating member and is secured to the valve case by a turning mechanism, and is moved forward and backward in the axial direction by the rotation of the rotating member to open and close the first main valve. And a valve of a type that controls the amount of water flowing into the valve case from the first inlet provided in the valve case in accordance with the opening degree of the first main valve. It is.

  In this valve, after the first main valve abuts on the first main valve seat and closes and stops moving, when the operating force from the handle is applied to the first main valve as it is, the first main valve There is a risk that the first main valve and the first main valve seat may be damaged by being excessively pressed against the one main valve seat.

  On the other hand, in this type of valve, even after the first main valve contacts the first main valve seat and closes, the first main valve is pressed against the first main valve seat with a constant force. This is necessary to maintain the water stop condition well.

  Therefore, the excessive operation force from the handle is absorbed, and on the other hand, the first main valve is kept pressed against the first main valve seat with a constant force even after the valve is closed, and the water stop state is maintained well. Therefore, a buffer spring mechanism is interposed between the advance / retreat member and the first main valve, and the forward / backward movement of the advance / retreat member is normally transmitted to the first main valve via the buffer spring mechanism. Is moved in the opening and closing direction, thereby changing the valve opening, and after the first main valve abuts on the first main valve seat and stops moving, the buffer spring is bent to make the first It is conceivable to absorb further forward movement of the advance / retreat member after the main valve is closed.

FIG. 26 shows a specific example thereof.
This example is an example of a hot water mixing valve with an automatic temperature control function. In the figure, 300 is a valve case, 302 and 304 are water (cold water) inlets as first inlets and hot waters as second inlets ( 306 and 308 are water side main valves as first main valves and hot water side main valves as second main valves, and 307 and 309 are water side main valves. 306, a hot water side main valve seat as a first main valve seat and a hot water side main valve seat as a second main valve seat respectively corresponding to the hot water side main valve 308.
The water side main valve 306 contacts and closes the water side main valve seat 307, and the hot water side main valve 308 contacts and closes the hot water side main valve seat 309.

  Reference numeral 310 denotes a rotating member that is coupled to the handle and rotates integrally with the handle. Reference numeral 312 denotes an advancing / retracting member that is screwed to the rotating member 310 and that is rotated around the valve case 300 by a rotation stop mechanism 314.

The advance / retreat member 312 moves forward and backward in the axial direction, that is, in the left-right direction in FIG. 26 by screw feed by the rotation of the rotary member 310, and moves the main valve body 316 having the water side main valve 306 and the hot water side main valve 308 in the axial direction. Thus, the water side main valve 306 and the hot water side main valve 308 are moved in the opening and closing directions, respectively.
Here, the rotation stop mechanism 314 is provided on the valve case 300 and the engagement claw 318 protruding radially outward from the advance / retreat member 312, and the engagement claw 318 can be moved in the axial direction but not in the rotation direction. And a guide groove 320 to be inserted.

A buffer spring mechanism 322 is interposed between the advance / retreat member 312 and the main valve body 316, specifically, the temperature adjustment shaft 324, and transmits the advance / retreat movement of the advance / retreat member 312 to the main valve body 316 via the temperature adjustment shaft 324. Is a buffer spring which forms the main element.
Reference numeral 328 denotes a temperature-sensitive spring made of a shape memory alloy coil spring, and 330 denotes a bias spring.

In this hot and cold water mixing valve, when the rotary member 310 is rotated by the handle, the advance / retreat member 312 moves forward and backward in the horizontal direction in the figure by screw feed.
Then, when the advance / retreat member 312 moves forward in the right direction in the figure, the main valve body 316 moves in the right direction in the figure via the buffer spring mechanism 322, the water side main valve 306 is in the closing direction, and the hot water side main valve 308 is in the opening direction. Move to.

  After the water-side main valve 306 comes into contact with the water-side main valve seat 307 and closes and stops moving, the buffer spring 326 of the buffer spring mechanism 322 bends to cause an elastic force to act on the water-side main valve 306. The water-side main valve 306 is maintained in its closed state by its elastic force, and further forward movement of the advance / retreat member 312 in the right direction in the drawing is absorbed. This prevents the water-side main valve 306 from being strongly and forcibly pressed against the water-side main valve seat 307 with excessive operating force.

  On the other hand, when the rotating member 310 is reversely rotated by the handle, the advance / retreat member 312 moves backward in the left direction in the figure, the main valve body 316 moves in the left direction in the figure, and the water side main valve 306 moves in the valve opening direction. The hot water main valve 308 moves in the valve closing direction.

  After the hot water main valve 308 abuts on the hot water main valve seat 309 and closes and stops moving, the buffer spring 326 of the buffer spring mechanism 322 is bent to exert an elastic force on the hot water main valve 308. The hot water main valve 308 is maintained in its closed state by its elastic force, and further backward movement of the advance / retreat member 312 is absorbed. This prevents the hot water main valve 308 from being strongly pressed against the hot water main valve seat 309 by excessive operating force.

  However, when such a buffer spring mechanism 322 is provided, the buffer spring mechanism 322 transmits the forward / backward movement of the advance / retreat member 312 to the main valve body 316 as it is without bending the buffer spring 326 at the time of normal operation, that is, temperature control operation. After the water side main valve 306 and the hot water side main valve 308 are closed, it is necessary to elastically deform (bend) the buffer spring 326 for the first time there, so that the buffer spring 326 inevitably has a strong spring force. Furthermore, after the water side main valve 306 and the hot water side main valve 308 are closed, the deflection of the buffer spring 326 increases as the advance / retreat member 312 moves forward and backward (collapsed). Therefore, there is a problem that the operation load of the handle becomes larger than necessary and the operation becomes heavier than necessary.

Under the state where the buffer spring 326 is greatly bent, a large reaction force acts on the rotation member 310 from the advance / retreat member 312, and the handle once rotated based on the reaction force moves forward and backward with the rotation member 310. Based on the screw connection with the member 312, a phenomenon occurs in which it rotates in the opposite direction and tries to return to its original state.
In particular, in the case of a hot and cold water mixing valve, such a phenomenon is likely to occur because the screw lead angle of the thread portion is large.
Unnecessary rotation of the handle regardless of the user's intention is unfavorable because it impairs the reliability of the operation of the faucet.

  Therefore, in order to prevent this, it is necessary to add a mechanism for increasing the rotational resistance, such as adding an O-ring for increasing the sliding resistance during rotation to prevent the rotation of the handle. When the main valve body 316 is moved in the opening / closing direction by operating the handle, the operation load after the water-side main valve 306 and the hot water-side main valve 308 are further closed is further increased.

  In Patent Document 1 below, the main valve is in contact with the main valve seat and closes, and after the movement is stopped, an excessive operating force from the handle is prevented from being applied to the main valve. A faucet valve is disclosed, which is a different solution from the present invention.

  Further, Patent Document 2 below discloses a faucet hot and cold water mixing valve having a temperature-sensitive spring composed of a coil spring made of a shape memory alloy and a bias spring, which is a characteristic configuration of the present invention. This is different from the present invention.

JP 2006-258272 A JP 2000-2360 A

  The present invention is based on the circumstances as described above, and after the valve is closed, the main valve can be maintained in a closed state with a constant force to maintain a good water stop state. The object of the present invention is to provide a faucet valve capable of preventing the operation force from being applied.

  Thus, according to the first aspect of the present invention, (a) a first main valve provided inside the valve case and moving forward and backward toward the first main valve seat to change the valve opening, and (b) the handle side (C) The screw is coupled to the rotating member and is screwed to the valve case by a locking mechanism, and is moved forward and backward by screw feed in the axial direction by the rotation of the rotating member. An advancing / retracting member for moving the first main valve in the opening / closing direction, and water flowing into the valve case from a first inlet provided in the valve case according to the valve opening degree of the first main valve A faucet valve for controlling the inflow amount of the first main valve, interposed between the advance / retreat member and the first main valve, and transmitting the advance / retreat movement of the advance / retreat member to the first main valve. Is moved in the opening and closing direction to change the valve opening, and the first main valve is brought into contact with the first main valve seat to close and stop moving. A buffer spring mechanism that absorbs further forward movement of the advance / retreat member after the first main valve is closed by bending the buffer spring, and (a) the advance / retreat member comprises: An engaging claw provided in a radially projecting state on one of the valve case side and the valve case side; and (b) provided on the other side, the engaging claw being movable in the axial direction and not movable in the rotational direction. And a guide mechanism that engages with the engaging claw after the advancement / retraction member has moved forward by a first set stroke after the first main valve is closed. The anti-rotation action is released by removing from the groove, and the advance / retreat member is rotated together with the rotation of the rotating member, and is rotated idly in the positive direction in which the first main valve of the rotating member is closed. After the idle rotation in the opposite direction to the idle rotation of the It characterized in that the by engaged into the guide grooves are no intended to restore the anti-rotation effect.

  According to the second aspect of the present invention, (a) provided inside the valve case, the valve opening degree is changed by moving forward and backward toward the water-side main valve seat as the first main valve seat by the forward and backward movement of the temperature control shaft. A water-side main valve as a first main valve, and a hot water-side main valve as a second main valve that moves forward and backward toward the hot water-side main valve seat as a second main valve seat to change the valve opening degree; (B) a rotating member on the handle side; and (c) screwed to the rotating member and secured to the valve case by a rotation-preventing mechanism, and forward and backward by screw feed in the axial direction by the rotation of the rotating member. An advancing / retreating member that is moved, the advancing / retreating movement of the advancing / retreating member causes the temperature adjusting shaft to advance / retreat via a buffer spring mechanism, and the advancement of the temperature adjusting shaft causes the water side main valve to close. The hot water side main valve is moved in the opening direction and the water side main valve is moved in the opening direction and the hot water side main valve is moved in the closing direction by the backward movement of the temperature control shaft A faucet that controls the inflow of cold water and hot water into the valve case from the cold water inlet as the first inlet and the hot water inlet as the second inlet provided in the valve case. The hot water mixing valve includes: (a) an engaging claw provided in a radially projecting state on one of the advance / retreat member side and the valve case side; and (b) A guide groove that is provided on the other side and engages the engaging claw so that the engaging claw is movable in the axial direction and immovable in the rotational direction, and the buffer spring mechanism is configured such that the water-side main valve is the water-side main valve. After the valve seat closes and stops moving, the buffer spring is bent to absorb further forward movement of the advance / retreat member after the water side main valve is closed, and the hot water side main After the valve contacts the hot water main valve seat and closes and stops moving, the buffer spring is bent. This absorbs the further backward movement of the advance / retreat member after the hot water main valve is closed, and the rotation stopping mechanism is configured so that the advance / retreat member is the first after the water side main valve is closed. After moving forward by one set stroke, the engaging claw is disengaged from the guide groove to release the anti-rotation action, and the advancing / retracting member is integrated with the rotation of the rotating member so that the water side main valve of the rotating member is After idling in the forward direction of the valve closing direction and idling in the opposite direction to the idling direction in the forward direction, the engaging claw is again engaged with the guide groove to restore the rotation stopping action. And / or after the advancing / retracting member has moved backward by the second set stroke after the hot water main valve is closed, the engaging claw is released from the guide groove to release the anti-rotation action. The advance / retreat member is integrally formed with the rotation of the rotation member. After rotating idly in the direction opposite to the direction in which the hot water main valve of the material is closed and idly rotating in the forward direction as much as the idling in the opposite direction, the engagement claw is again engaged in the guide groove. It is characterized in that the anti-rotation action is restored.

  According to a third aspect of the present invention, in the second aspect, the hot and cold water mixing valve has an automatic temperature control function, and expands and contracts in the axial direction in response to the mixed water temperature, so that the mixed water is higher than the set temperature. The water-side main valve and the hot-water side main valve are moved in the direction to close the hot-water side main valve, and the water-side main valve and the hot-water side main valve. On the other hand, a spring for applying an urging force in a direction opposite to the moving direction of the temperature sensing element is provided.

  According to a fourth aspect of the present invention, in the third aspect, the temperature sensing element is a temperature sensitive spring made of a shape memory alloy coil spring.

  According to a fifth aspect of the present invention, in the fourth aspect, the main valve body having the water side main valve and the hot water side main valve is configured separately from the temperature control shaft, and the main valve body is the temperature control shaft. The temperature control shaft is held by the temperature control shaft so as to be relatively movable, and the temperature control shaft further includes the temperature-sensitive spring and the bias on opposite sides of the main valve body in the axial direction. The spring is assembled and held in a state in which it exerts an urging force in the axial direction opposite to the main valve body. The temperature-sensitive spring and the bias spring together with the main valve body are moved as the temperature control shaft moves. It is characterized in that the valve unit is movable while keeping the length of the valve constant.

  A sixth aspect of the present invention is the back pressure according to the first aspect, wherein the valve is formed behind the first main valve, and the internal pressure acts on the first main valve as a pressing force in the valve closing direction. A chamber, an introduction small hole for leading the pressure of the primary side from the first inlet into the back pressure chamber, and a secondary side of the back pressure chamber downstream of the first main valve. The pilot hole as a pressure release hole that is pulled out to reduce the pressure and moves forward and backward toward the pilot valve seat formed in the first main valve, and the opening degree of the pilot hole is controlled to control the first main valve. A pilot valve having a pilot valve that moves forward and backward in accordance with a direction, wherein the first main valve is closed by contact of the pilot valve with the pilot valve seat, And the advance / retreat member moves the pilot valve, and the pilot valve None shall move one main valve in the closing direction, characterized in that are.

  According to a seventh aspect of the present invention, in any one of the second and third aspects, the hot and cold water mixing valve has a pilot valve, and the water side main valve and / or the hot water side main valve is moved by the forward and backward movement of the pilot valve. The pressure in the back pressure chamber that causes the internal pressure to act as a pressing force in the valve closing direction is increased or decreased to move the water side main valve or / and the hot water side main valve in the opening / closing direction, and the water side main valve The hot water side main valve is fully opened when the hot water side main valve is closed, and the water side main valve is synchronously fully opened when the hot water side main valve is closed, and the pilot valve Is held on the temperature control shaft, and the advance / retreat member moves the temperature control shaft forward and backward.

  According to an eighth aspect of the present invention, in the seventh aspect, the pilot valve is configured separately from the temperature control shaft, and the pilot valve is movable at the temperature control shaft so as to be movable relative to the temperature control shaft. And the hot water / water mixing valve is provided with an automatic temperature control function, and the temperature control shaft is further provided on the opposite side in the axial direction with respect to the pilot valve. A temperature sensing spring comprising a coil spring made of a shape memory alloy as a warm body and the bias spring are assembled and held in a state in which a biasing force is exerted in the opposite axial direction to the pilot valve. The spring and the bias spring, together with the pilot valve, constitute a pilot valve unit that can move together while keeping the entire length constant as the temperature adjusting shaft moves.

Effects and effects of the invention

  As described above, according to the present invention, the buffer spring mechanism is provided in a state interposed between the first main valve and the advance / retreat member that moves forward / backward in the axial direction by screw feed by the rotation of the rotation member on the handle side. The movement is transmitted to the first main valve via the buffer spring mechanism and moved in the opening / closing direction to change the valve opening, and the first main valve is brought into contact with the first main valve seat and closed to stop the movement. After that, the buffer spring is bent to absorb further advance / retreat movement of the advance / retreat member after the first main valve is closed, and a rotation stop mechanism for stopping the advance / retreat member is provided for the advance / retreat member. An engaging claw provided in a radially projecting state on one of the valve side and the valve case side, and a guide groove provided on the other for engaging the engaging claw so as to be movable in the axial direction and immovable in the rotational direction And the detent mechanism is advanced after the first main valve is closed. After the member has moved forward by the first set stroke, the engaging claw is released from the guide groove to release the anti-rotation action, and the advance / retreat member is integrated with the rotation of the rotating member to close the first main valve of the rotating member. After rotating idly in the forward direction of the direction and idling in the opposite direction to the idling direction in the forward direction, the engaging pawl is again engaged in the guide groove to recover the anti-rotation action. is there.

  According to the present invention, even after the first main valve contacts and closes the first main valve seat, the first main valve is pressed against the first main valve seat by the spring force of the buffer spring in the buffer spring mechanism. The water stop state can be maintained well.

  In addition, after the first main valve abuts on the first main valve seat and closes and stops moving, the forward and backward movement of the advancing and retracting member after the first main valve is closed is made by bending the buffer spring. The first main valve can be prevented from being strongly pressed against the first main valve seat by excessive operating force, and the first main valve, the first main valve seat, or the operating force transmission mechanism can be damaged. It can prevent favorably.

However, if the operation force applied to the handle is absorbed only by the deflection of the buffer spring after the first main valve is closed, the operation load increases more than necessary, and the usability of the faucet deteriorates.
In addition, when the handle is turned too much, if the hand is released from the handle, the handle, specifically, the rotating member rotates (rotates) to the return side due to the large reaction force of the buffer spring based on the screw connection with the advance / retreat member. Cause a phenomenon.

  However, in the present invention, when the advance / retreat member moves forward by the first set stroke after the first main valve is closed, the rotation stop mechanism that stops the advance / retreat member releases the stop action, and the advance / retreat member is moved together with the rotation member. Since the idle rotation (in the positive direction) is integrally stopped and further advancement of the advancing / retreating member is stopped, the buffer spring is not excessively bent, so that the buffer spring is not bent excessively, that is, its It is possible to satisfactorily prevent the rotating member and the handle from rotating on the return side by the reaction force.

  In order to prevent the handle from returning to its original state due to the large reaction force of the buffer spring after the handle is excessively operated, an additional mechanism for increasing the rotation resistance of the handle, such as addition of an O-ring, is provided. Therefore, it is possible to solve the problem that the mechanism for increasing the rotational resistance increases the operation load during normal operation or operation after the main valve is closed.

  When the advance / retreat member is idled in the forward direction and then idled together with the rotary member in the opposite direction, the engagement pawl of the anti-rotation mechanism is again engaged with the guide groove and the anti-rotation action. Therefore, by rotating the rotating member in the reverse direction thereafter, the advancing / retreating member can be moved backward without any trouble under the detent action by the detent mechanism, and the first main valve in the closed state is opened. be able to.

  The present invention is applicable not only to a single water faucet valve, but also to a hot and cold water mixing valve, specifically a temperature control shaft, a water side main valve as a first main valve, and a water side main valve as a corresponding first main valve seat. A valve seat, a hot water main valve as a second main valve, a hot water main valve seat as a corresponding second main valve seat, a cold water inlet as a first inlet, and a hot water inlet as a second inlet The present invention can also be applied to a hot and cold water mixing valve having the following features.

  In this case, the temperature adjustment shaft is moved forward and backward through the buffer spring mechanism by the advance / retreat movement of the advance / retreat member, the water side main valve is opened by the advance of the temperature adjustment shaft, and the hot water side main valve is moved by the backward movement of the temperature adjustment shaft Each can be moved in the closing direction.

Also, after the water-side main valve contacts and closes the water-side main valve seat and stops moving, the buffer spring mechanism is configured to bend the advancing / retracting member after the water-side main valve is closed by bending the buffer spring. After the hot water main valve abuts the hot water main valve seat and closes and stops moving, the buffer spring is bent to absorb further backward movement of the advance / retreat member. Can be kept.
Further, the rotation stopping mechanism is configured such that after the water-side main valve is closed, the advancing / retreating member moves forward by the first set stroke, and then the engagement claw is released from the guide groove to release the rotation-retaining action. Rotate the water side main valve of the rotating member in the forward direction in the same direction as the rotation of the rotating member, and idle in the opposite direction to the idle rotation in the forward direction. The engaging claw is released from the guide groove after the advancement / retraction member has moved backward by the second set stroke after the hot water main valve is closed. The anti-rotation action is released, the advance / retreat member is rotated together with the rotation of the rotating member, and is idled in the reverse direction of the direction in which the hot water main valve of the rotating member is closed. After the idle rotation, the engagement claw is again engaged with the guide groove to recover the locking action. It is possible to be without as.

  In this way, the water-side main valve and the hot water-side main valve can be kept in a water-stopping state well even after the valve is closed by the elastic force of the buffer spring, and the water-side main valve and / or hot water can be maintained. After the side main valve is closed, the handle operating load can be prevented from becoming unnecessarily large, and the handle can be prevented from rotating and returning to its original position.

The present invention can also be suitably applied to a hot and cold water mixing valve with an automatic temperature control function.
Specifically, it expands and contracts in the axial direction in response to the temperature of the mixed water, opens the water-side main valve when the mixed water becomes higher than the set temperature, and moves (finely moves) the water-side main valve in the closing direction. It has a temperature sensing element and a spring that exerts an urging force in the opposite direction, and automatically adjusts the water-side main valve and the hot water-side main valve to the set valve openings by these temperature sensing element and spring. The present invention can be applied to one having a function (claim 3).

  In this case, a temperature-sensitive spring composed of a coil spring made of a shape memory alloy can be suitably used as the temperature-sensitive body (claim 4).

Further, in this case, the water side main valve, the hot water side main valve, the temperature sensing spring as the temperature sensing element, and the bias spring are held on the temperature control shaft to form a valve unit, which is moved in the axial direction together with the temperature control shaft. Can be made to
Specifically, the main valve body having the water side main valve and the hot water side main valve is configured separately from the temperature adjustment shaft, and is held so as to be relatively movable on the temperature adjustment shaft. Further, a temperature-sensitive spring and a bias spring are assembled and held on opposite sides of the main valve body in the axial direction in a state in which an urging force is applied to the main valve body in the opposite direction. The spring can be moved in the axial direction integrally with the temperature control shaft together with the main valve body so as to keep the total length constant (Claim 5).

In this way, when the advancement / retraction member is moved forward / backward by the rotation of the rotation member during the temperature control operation, the spring force of the bias spring does not act as a resistance force, so the spring force of the buffer spring overcomes the spring force of the bias spring. It is not necessary to have such a large spring force, that is, the spring force of the buffer spring can be set to the minimum necessary small spring force, so that the water side main valve and the hot water side main valve are closed. The operation load of the handle after the valve can be reduced as much as possible, and a light operation can be realized.
Further, since the spring force of the buffer spring can be reduced, the diameter of the buffer spring can be reduced when it is constituted by a coil spring, and the sliding resistance when idling the advance / retreat member can be reduced.

  In the present invention, the valve according to claim 1 can be configured as a pilot-type valve, and in this case, a part of the force required when the first main valve is closed and water is stopped is obtained. Since the water pressure bears, the spring force of the buffer spring can be set smaller, and therefore the operation load after the first main valve is closed can be reduced (claim 6).

According to the present invention, the hot and cold water mixing valve can be configured as a pilot valve according to claim 7.
Specifically, the hot water / water mixing valve has a pilot valve, and the back and forth movement of the pilot valve causes the internal pressure to act on the water side main valve and / or the hot water side main valve as a pressing force in the valve closing direction. Increase or decrease the pressure in the pressure chamber, move the water-side main valve or / and the hot water-side main valve in the opening / closing direction, and simultaneously open the hot water-side main valve when the water-side main valve is closed. There is no pilot type valve that opens the water side main valve synchronously when the side main valve is closed, and the pilot valve is held by the temperature adjustment shaft, and the temperature adjustment shaft is moved forward and backward by the advance / retreat member I can keep it.
Here, when the hot and cold water mixing valve is configured as a pilot type valve, it can be made into various types of pilot type valves.

For example, the hot and cold water mixing valve can be configured as a pilot valve having the following configurations (A), (B), and (C).
(A) (A) A water-side back pressure chamber formed as a back pressure chamber formed behind the water-side main valve and acting as a pressing force in the valve closing direction against the water-side main valve; ) A water-side introduction small hole that introduces primary water from the water inlet into the water-side back pressure chamber and increases the pressure, and (c) water in the water-side back pressure chamber is downstream of the water-side main valve. The water side pilot hole as a pressure release hole for reducing the pressure by extracting to the secondary side of the water, and (d) the opening degree of the water side pilot hole by moving forward and backward toward the water side pilot valve seat formed in the water side main valve And a water side pilot valve that moves the water side main valve back and forth in the same direction, and the water side main valve is formed integrally with the water side main valve. A pilot-type hot / cold water mixing valve in which the hot water main valve is moved as a unit using the valve as a drive valve.

  (B) (a) A hot water side back pressure chamber as a back pressure chamber formed behind the hot water side main valve and acting as a pressing force in the valve closing direction on the hot water side main valve; ) A hot water introduction small hole that introduces primary hot water from the hot water inlet into the hot water back pressure chamber and raises the pressure, and (c) hot water in the hot water back pressure chamber is downstream of the hot water main valve. The hot water side pilot hole as a pressure release hole that is pulled out to the secondary side of the hot water side and (d) the hot water side pilot valve seat formed in the hot water side main valve moves forward and backward to open the hot water side pilot hole. The hot water side main valve is configured to be integrated with the hot water side main valve, and the hot water side main valve is integrated with the hot water side main valve. A pilot-type hot / cold water mixing valve that uses the valve as a drive valve to move the water-side main valve together.

  (C) The water-side main valve and the hot water-side main valve can be moved separately and independently. (A) The water-side main valve and the hot water-side main valve are formed behind the From the water back pressure chamber and the hot water side back pressure chamber as back pressure chambers that act as a pressing force in the closing direction on the water side main valve and the hot water side main valve, respectively, and (b) from the water inlet and the hot water inlet Water side hot water holes and hot water side small holes for introducing and increasing the pressure of primary water and hot water inside these back pressure chambers, and (c) water in the back pressure chambers on the water and hot water sides , Water side main valve, water side pilot hole as hot water side pilot hole as pressure release hole to draw down to the downstream side of water side main valve and downstream side of hot water side main valve, and (d) water side main valve, hot water It moves forward and backward toward the water-side and hot-water pilot valve seats formed on the side main valve to control the opening of each pilot hole, and the water-side main valve and hot-water main valve follow each other in the same direction. Move forward and backward Side pilot valve, the hot and cold water mixing valve of a pilot type that is none as having a hot side pilot valve, the.

  Next, according to an eighth aspect of the present invention, there is provided a hot water mixing valve with an automatic temperature control function, in which a pilot valve is incorporated in a temperature control shaft together with a temperature sensing spring and a bias spring as temperature sensing elements, and they are integrated in the axial direction of the temperature regulation shaft. According to this claim 8, when the advancement / retraction member is moved forward / backward by the rotation of the rotation member during the temperature control operation, the spring force of the bias spring does not act as a resistance force. In addition, since the main valve can be moved by controlling the pressure in the back pressure chamber by the pilot valve, a part of the force for closing the main valve can be taken up by the water pressure. The spring force can be further reduced, and the operation load on the handle can be further effectively reduced.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment in which the present invention is applied to a single water faucet valve, in which 10 is a valve case.
The valve case 10 is provided with a water (cold water) inlet 12 and an outlet 14 as a first inlet, a water inlet passage 16 following the water inlet 12, and a water outlet passage 18 following the outlet 14. .

Reference numeral 20 denotes a main valve (first main valve), and 22 denotes a main valve seat (first main valve seat) corresponding to the main valve seat which is configured at the upper end of the cylindrical portion 24 in the drawing.
The main valve 20 moves in the vertical direction in the figure toward the main valve seat 22 and closes by bringing the seal member (valve seat) 26 made of an elastic material into contact with the main valve seat 22 by the downward movement in the figure. In addition, the valve is moved away from the main valve seat 22 by the upward movement in the figure, and the valve opening is changed according to the amount of the movement.

A rotating member 28 on the handle side has a shaft portion 30 and a cylindrical portion 32, and the shaft portion 30 is rotatably fitted in the fitting hole 34 of the valve case 10.
The shaft portion 30 is sealed in a watertight manner with respect to the fitting hole 34 by an O-ring 38 as an annular seal member, and a handle connecting portion 36 is provided at a protruding portion from the valve case 10, and the handle connecting portion 36. Are connected to a rotationally operated handle (handle 130 in FIG. 6) in an integrally rotated state.

  Reference numeral 40 denotes a retaining ring mounted on the shaft portion 30, and the rotating member 28 is positioned in the axial direction, that is, in the vertical direction in the figure by the retaining ring 40 and the cylindrical portion 32.

Reference numeral 42 denotes an advance / retreat member that is screwed to the rotary member 28 and moves forward / backward in the vertical axial direction in the drawing.
A male screw 44 is formed on the outer peripheral surface of the advance / retreat member 42, and the male screw 44 is screwed into a female screw 46 formed on the inner peripheral surface of the cylindrical portion 32 of the rotating member 28.

The advancing / retracting member 42 is moved up and down in the figure by the rotation of the rotating member 28 under the rotation stopping mechanism 48 by the rotation stopping mechanism 48 provided across the valve case 10 and the advancing / retreating member 42 by the male screw 44 and the female screw 46. It can be moved in the direction.
The advancing / retreating member 42 has a radially inward latching portion 50 at a lower end portion in the drawing, and the latching portion 50 is latched to a flange portion 52 as a latched portion of the main valve 20 to be connected to the main valve. 20 is supported upward in the figure.

54 is a buffer spring mechanism interposed between the advance / retreat member 42 and the main valve 20, and 56 is a buffer spring comprising a coil spring constituting the main element.
The buffer spring 56 abuts the upper end in the drawing on the stepped portion 58 of the advance / retreat member 42 and the lower end abuts on the flange portion 52 in the main valve 20 to urge the main valve 20 downward in the drawing. ing.

The main valve 20 moves in the vertical direction in the figure integrally with the advance / retreat member 42 while being held by the advance / retreat member 42 based on the downward biasing force of the buffer spring 56 in the figure.
The main valve 20 has a shaft portion 60 protruding upward in the figure, and the advancing / retracting member 42 is provided with a recess 62 for inserting the shaft portion 60 upward.

The anti-rotation mechanism 48 is provided on the valve case 10 and a pair of engaging claws 64 and 66 projecting radially outward from the advancing and retracting member 42. A pair of guide grooves 68 and 70 that are movable in the direction) and immovable in the rotational direction.
Here, the pair of engaging claws 64 and 66 and the pair of guide grooves 68 and 70 are provided at two locations separated by 180 ° in the circumferential direction.

  The rotation stopping mechanism 48 is normally in a state where the pair of engaging claws 64 and 66 are engaged with the guide groove 68, and when the rotation member 28 is rotated by the handle, the advance / retreat member 42 is stopped. As a result, the advance / retreat member 42 is advanced and retracted in the vertical direction in the figure by screw feed.

  However, when the main valve 20 comes into contact with the main valve seat 22 and closes, when the advancing / retreating member 42 further moves a fixed stroke (first set stroke) downward in the figure while bending the buffer spring 56, the engaging claw 64 is engaged. , 66 are determined so that the engaging claws 64, 66 and the guide grooves 68, 70 are disengaged downward from the guide grooves 68, 70 in the figure.

The rotation stop mechanism 48 also has a stopper portion 72 that protrudes downward from the lower end of each of the pair of guide grooves 68 and 70 in the drawing.
Here, the stopper portion 72 stands downward with respect to the pair of guide grooves 68 and 70 on the side opposite to the rotation direction of the corresponding pair of engaging claws 64 and 66, specifically the rotation direction of the rotation member 28. It's down.

  Accordingly, the pair of engaging claws 64 and 66 that are disengaged downward from the guide grooves 68 and 70 in the figure can rotate in the rotating direction of the rotating member 28 (the positive direction that is the direction in which the main valve 20 is closed). The stopper 72 prevents rotation in the reverse direction.

Next, the operation of this embodiment will be described below.
In this embodiment, when the rotating member 28 coupled to the handle in an integrally rotating state is rotated in the direction of the arrow in FIG. 2 by the operating force applied to the handle, the rotation stop mechanism 48 is shown in FIG. Due to the anti-rotation action, the advance / retreat member 42 is moved forward by screw feed downward in the figure.
At this time, the main valve 20 held by the advance / retreat member 42 is also moved downward in the drawing, that is, in the valve closing direction.
Then, at a certain position, the main valve 20 contacts the main valve seat 22, and the main valve 20 is closed as shown in FIG.

  The movement of the main valve 20 is stopped by closing the valve by contact with the main valve seat 22, but a buffer spring 56 is interposed between the main valve 20 and the advance / retreat member 42 that holds the main valve 20. Since the buffer spring 56 urges the main valve 20 downward, as shown in FIG. 2 (II), the advancing / retreating member 42 continues further downward in the figure even after the main valve 20 is closed. Go forward.

In other words, after the main valve 20 is closed, the advance / retreat member 42 is further moved forward by a screw feed in the downward direction in FIG.
The main valve 20 is pressed downward in the figure against the main valve seat 22 by the elastic force due to the bending of the buffer spring 56 at this time, and the main valve 20 is well maintained in a sealed state based on the pressing force. That is, it is maintained in a water stop state.

  On the other hand, as shown in FIG. 2 (II), when the advance / retreat member 42 moves downward in the figure by a fixed stroke (first set stroke), the pair of engaging claws 64, 66 in the locking mechanism 48 at that time The corresponding guide grooves 68 and 70 are disengaged from the lower ends (see FIG. 3 (II)). Here, the advance / retreat member 42 rotates together with the rotation member 28 in the direction of the arrow (positive direction) in FIG. Accordingly, the forward / backward member 42 is stopped from moving downward in the drawing after the rotation of the rotary member 28.

The engaging claws 64 and 66 have a small protrusion 74 rounded at the upper end in FIG. 3, and the small protrusion 74 is a slide formed continuously from the lower end of the guide grooves 68 and 70 in the circumferential direction. Slide along the moving surface 76.
Therefore, the sliding resistance when the engaging claws 64 and 66 slide along the sliding surface 76 is small.
In FIG. 3 (III), the left sliding surface 76 of the stopper 72 is for sliding the engaging claws 66 or 64 at a circumferential position different from the engaging claws 64 or 66 by 180 °.

  On the other hand, when the rotary member 28 is rotated together with the handle in the direction opposite to the above, that is, in the direction opposite to the arrow in FIG. 2 to open the main valve 20 in the closed state, the advance / retreat member 42 is moved in the direction of the previous arrow. When idling in the opposite direction to the idling rotation, the pair of engaging claws 64 and 66 come into contact with the stopper portion 72, where further idling in the opposite direction is prevented. Then, when the pair of engaging claws 64 and 66 are reengaged into the corresponding guide grooves 68 and 70, the rotation stopping mechanism 48 recovers the rotation stopping action.

  Accordingly, when the rotating member 28 is further rotated in the opposite direction to the arrow in this state, the advancing / retreating member 42 is moved backward in the drawing by screw feed, and the latching portion 50 of the advancing / retreating member 42 is moved to the main position at a certain position. The main valve 20 is lifted upward in the figure along with the backward movement of the advancing / retreating member 42 to be hooked on the flange portion 52 of the valve 20 and separated from the main valve seat 22 upward in the figure. That is, the main valve 20 is opened.

  According to the present embodiment as described above, after the main valve 20 contacts the main valve seat 22 and closes, the main valve 20 is pressed against the main valve seat 22 by the spring force of the buffer spring 56 in the buffer spring mechanism 54. It can be maintained in a state, and the water stop state can be maintained well.

  Further, after the main valve 20 abuts on the main valve seat 22 and closes and stops moving, the forward movement of the advance / retreat member 42 after the main valve 20 is closed can be absorbed by bending the buffer spring 56. Further, it is possible to prevent the main valve 20 from being forcibly and strongly pressed against the main valve seat 22 by an excessive operating force, and it is preferable that the main valve 20, the main valve seat 22 or the operating force transmission mechanism is damaged. Can be prevented.

However, if the operation force applied to the handle after the main valve 20 is closed is absorbed only by the bending of the buffer spring 56, the operation load increases more than necessary, and the usability of the faucet deteriorates.
When the handle is excessively turned, when the hand is released from the handle, the handle, specifically, the rotating member 28 is rotated to the return side by the large reaction force of the buffer spring 56 based on the screw connection with the advance / retreat member 42 (rotation). ) Will occur.

  However, in this embodiment, when the advancement / retraction member 42 moves forward by a fixed stroke after the main valve 20 is closed, the rotation stop mechanism 48 that stops the advancement / retraction member 42 releases the rotation stopping action, and the advancement / retraction member 42 is moved. Since the idle rotation (in the positive direction) is integrally performed together with the rotation member 28 and the further advancement of the advance / retreat member 42 is stopped, the buffer spring 56 is not excessively bent, and therefore the buffer spring 56 is more than necessary. It is possible to satisfactorily prevent the rotating member 28 and the handle from rotating to the return side by itself due to the large bend, that is, the reaction force.

  In addition, in order to prevent the handle 130 from returning to the original state due to the reaction force due to the large deflection of the buffer spring 56 after excessively operating the handle 130, an additional O-ring is added to increase the rotational resistance of the handle. Therefore, it is possible to solve the problem that the mechanism for increasing the rotational resistance of the mechanism further increases the operation load during normal operation or operation after the main valve 20 is closed. Can do.

  In this embodiment, when the advance / retreat member 42 is idly rotated in the forward direction and then idly rotated together with the rotation member 28 in the opposite direction, the anti-rotation mechanism 48 recovers the anti-rotation action again. When the rotary member 28 is rotated in the reverse direction, the advance / retreat member 42 can be moved back upward in the figure without any trouble, and the main valve 20 in the closed state can be opened.

4 and 5 show an example in which the valve of the above embodiment is configured as a pilot type valve.
In the figure, reference numeral 78 denotes a pilot valve. In this example, instead of the main valve 20, the pilot valve 78 is held by the advance / retreat member 42 with the same structure as described above, and the advance / retreat member 42 also rotates with the same structure as described above. It is screwed to the member 28 and is stopped by a rotation stop mechanism 48.
Further, a pilot valve 78 is urged downward in the figure by a buffer spring mechanism 54 similar to the above.
Therefore, here, only the reference numerals are shown in the corresponding portions, and further detailed description thereof will be omitted.

  A main valve 80 includes a diaphragm valve. The main valve 80 includes a hard main valve main body 82 and a rubber diaphragm film 84 held by the main valve body 82. The outer periphery of the diaphragm film 84 is fixed to the valve case 10. The central portion inside the outer peripheral portion can be displaced in the vertical direction in the figure.

81 is a back pressure chamber formed behind the upper side of the main valve 80 in the figure. The back pressure chamber 81 acts on the main valve 80 as a pressing force in the valve closing direction downward in the figure. Let
84 is an introduction small hole provided through the main valve 80, and this introduction small hole 83 guides the water on the primary side on the water inlet 12 side to the back pressure chamber 81, and controls the pressure in the back pressure chamber 81. Increase.

Reference numeral 86 denotes a pilot hole serving as a pressure release hole provided in a state of penetrating the main valve 80 at the center. This pilot hole 86 draws water in the back pressure chamber 81 to the secondary side on the water outlet 14 side. The pressure in the back pressure chamber 81 is decreased.
In the main valve 80, a pilot valve seat 88 is formed around the pilot hole 86 on the back pressure chamber 81 side, and the pilot valve 78 is moved back and forth in the vertical direction in the figure toward the pilot valve seat 88.

  Thus, when the pilot valve 78 abuts on the pilot valve seat 88, the pilot valve 78 is closed, and when the pilot valve 78 is separated from the pilot valve seat 88 upward in the figure, the pilot valve 78 is opened. It becomes a valve state.

Reference numeral 94 denotes a shaft portion of the pilot valve 78, and a concave portion 62 provided in the advance / retreat member 42 allows the shaft portion 94 of the pilot valve 78 to be inserted upward in the drawing.
Reference numeral 90 is a seal portion (valve seat) made of an elastic material provided in the pilot valve 78, and 92 is a watertight seal between the shaft portion 94 of the pilot valve 78 and the fitting hole of the shaft portion 94 in the valve case 10. It is an O-ring as an annular seal member.

  In the pilot type valve of this embodiment, the pilot valve 78 is moved under the state shown in FIG. 4, that is, under the state where the pilot valve 78 is spaced upward from the pilot valve seat 88 and the pilot valve 78 is opened. When moving downward in the figure, that is, in the valve closing direction, the gap between the pilot valve 78 and the pilot valve seat 88 is temporarily reduced, and the opening of the pilot hole 86 (opening with respect to the back pressure chamber 81) is reduced. It becomes small temporarily.

Then, the flow rate of the water in the back pressure chamber 81 flowing out to the secondary side through the pilot hole 86 is reduced and the pressure in the back pressure chamber 81 is increased, and the increased pressure causes the downward pressure in the figure against the main valve 80. Will increase.
As a result, the main valve 80 slightly moves downward in the drawing, that is, in the valve closing direction.

Then, the opening degree of the pilot hole 86 increases, the flow rate of water flowing out from the back pressure chamber 81 through the pilot hole 86 increases, and as a result, the pressure in the back pressure chamber 81 decreases.
Then, when the pressure in the back pressure chamber 81 and the pressure on the primary side on the water inlet 12 side balance, the downward movement of the main valve 80 stops.
At this time, the gap between the pilot valve 78 and the pilot valve seat 88 is the same size as the initial gap. That is, the opening degree of the pilot hole 86 becomes the same as the initial state.

  Thereafter, the main valve 80 follows the pilot valve 78 in the same direction as the downward movement of the pilot valve 78 in the figure while maintaining a constant minute follow-up gap between the pilot valve 78 and the pilot valve seat 88. Finally, the main valve 80 comes into contact with the main valve seat 22 and closes. At this time, the pilot valve 78 also comes into contact with the pilot valve seat 88 to be closed.

On the other hand, when the pilot valve 78 moves upward in the drawing, that is, in the valve opening direction, the main valve 80 follows the pilot valve 78 and keeps upward while maintaining a constant minute tracking gap with the pilot valve 78. Move and open the valve.
The amount of opening of the main valve 80 at that time is defined by the amount of reverse movement of the pilot valve 78.

In this embodiment, when the rotary member 28 is rotated together with the handle in the direction of the arrow in FIG. 5, the advance / retreat member 42 moves forward in the downward direction in the figure, and the pilot valve 78 in the open state moves forward in the downward direction in the figure. Let As a result, the main valve 80 moves downward following the pilot valve 78 to reduce the valve opening.
Finally, the pilot valve 78 comes into contact with the pilot valve seat 88 and closes, and the main valve 80 comes into contact with the main valve seat 22 and closes (FIG. 5 (I)).

When the rotary member 28 is further rotated in the direction of the arrow in FIG. 5 with the pilot valve 78 and the main valve 80 closed in this manner, the main valve 80 and the pilot valve 78 move downward in the figure. In this case, the buffer spring 56 is bent in the vertical direction, and allows the advancement / retraction member 42 to advance downward.
Due to the elastic deformation of the buffer spring 56, the pilot valve 78 and the main valve 80 are pressed in the valve closing direction and held in the pressed state.

  On the other hand, when the advance / retreat member 42 moves downward by a predetermined stroke after the pilot valve 78 and the main valve 80 are closed, the rotation stop action by the rotation stop mechanism 48 is released in the same manner as described above, and the advance / retreat member 42 is moved further. This downward movement is stopped (FIG. 5 (II)).

  Further, when the rotating member 28 is rotated in the direction opposite to the arrow in FIG. 5 to open the pilot valve 78 and the main valve 80 in the same manner as described above, the anti-rotation action by the anti-rotation mechanism 48 is restored at a certain point, and thereafter The advancing / retracting member 42 is pulled upward in the drawing by screw feed as the rotating member 28 rotates in the direction opposite to the arrow in FIG. 5, and the buffer spring 56 is expanded again by this, so that the advancing / retreating member 42. The pilot valve 78 is lifted upward by the upward movement. That is, it is pulled up in the valve opening direction. At the same time, the main valve 80 follows the pilot valve 78 and moves upward to open the valve.

In this embodiment, since the hydraulic pressure bears a part of the force required when the main valve 80 is closed and water is stopped, the spring force of the buffer spring 56 can be set smaller, and therefore the main valve 80 is closed. The operation load after the valve can be reduced.
In this embodiment, since the O-ring 92 is sealed watertight, the O-ring 38 may be omitted.

6 to 10 show other embodiments of the present invention.
In this example, the present invention is applied to a hot / cold water mixing valve (a non-pilot type hot / cold water mixing valve). The hot / cold water mixing valve has a valve case 10 as in the above-described embodiment. In addition, a water inlet 12 as a first inlet and a hot water (hot water) inlet 100 as a second inlet are provided. Further, following the water inlet 12 and the hot water inlet 100, a water inflow passage 16 and a hot water inflow passage 102 are provided.
The water and hot water flowing in from the water inlet 12 and the hot water inlet 100 are mixed in the mixing chamber 104 and then flow out to the right in the figure from the outlet 106.

A cylindrical main valve body 108 is provided inside the valve case 10 so as to be slidable in the left-right direction in the drawing.
The main valve body 108 is integrally formed with a water side main valve 110 as a first main valve and a hot water side main valve 112 as a second main valve. The movement causes the water-side main valve 110 and the hot water-side main valve 112 to change the valve opening in a reverse relationship.
And the ratio of the water and hot water which flow in from the water inlet 12 and the hot water inlet 100 changes with the change of the valve opening degree of these water side main valves 110 and the hot water side main valve 112, and mixed water temperature is adjusted.

The valve case 10 has a water side main valve seat 114 as a first main valve seat and a hot water side main valve seat 116 as a second main valve seat, corresponding to the water side main valve 110 and the hot water side main valve 112, respectively. The water-side main valve 110 is closed in contact with the water-side main valve seat 114 in the axial direction.
Further, the hot water main valve 112 comes into contact with the hot water main valve seat 116 and closes.

  In this embodiment, when the water-side main valve 110 contacts and closes the water-side main valve seat 114, the hot water-side main valve 112 is fully opened, and conversely, the hot water-side main valve 112 is switched to the hot water-side main valve seat 116. The water side main valve 110 is fully opened when it contacts and is closed.

The main valve body 108 is connected to a temperature adjusting shaft 118, which will be described later, by an arm 120, and is configured integrally.
Here, an axial passage 122 is formed between the arms 120 and 120 in the circumferential direction, and hot water flowing in from the hot water inlet 100 flows into the mixing chamber 104 through the passage 122, where the water inlet 12. The water is mixed with the water flowing in from the outlet, becomes mixed water, and flows out from the outlet 106 to the right in the figure.
The water inlet 12 and the hot water inlet 100 are cut off from each other by an O-ring 124 as an annular seal member held on the outer peripheral surface of the main valve body 108.

Inside the mixing chamber 104, a temperature sensitive spring 126 made of a coil spring made of a shape memory alloy is disposed.
The temperature-sensitive spring 126 abuts the left end in the figure on the temperature adjusting shaft 118 and urges the main valve body 108 to the left in the figure via the temperature adjusting shaft 118.
The temperature-sensitive spring 126 expands and contracts in response to the temperature of the mixed water in the mixing chamber 104, and increases or decreases the urging force toward the left in the figure with respect to the main valve element 108.

  That is, when the temperature of the mixed water in the mixing chamber 104 becomes higher than the set temperature, the temperature-sensitive spring 126 expands in the axial direction and increases the leftward biasing force on the main valve body 108 to increase the main valve The body 108 is slightly moved leftward in the figure. That is, the main valve body 108 is slightly moved leftward in the drawing in the direction in which the water side main valve 110 is opened and the hot water side main valve 112 is closed.

Reference numeral 128 denotes a bias spring made of a metal coil spring that applies a biasing force to the main valve body 108 in the axial direction opposite to that of the temperature-sensitive spring 126. The right end in the figure is brought into contact with the temperature adjustment shaft 118. .
The main valve body 108 is position-controlled at a position where the biasing forces of the bias spring 128 and the temperature-sensitive spring 126 are opposite to each other, and performs a temperature adjustment (temperature adjustment) operation.

Also in this example, the rotation member 28 on the handle 130 side that rotates integrally with the handle 130 is provided as in the above embodiment.
Here, the rotating member 28 has the same configuration as described above, and includes a shaft portion 30 and a cylindrical portion 32, and the shaft portion 30 is rotatably fitted in the fitting hole 34 of the valve case 10, and The fitting hole 34 is sealed watertight by an O-ring 38 attached to the shaft portion 30.
Further, a handle connecting portion 36 provided at a protruding portion from the valve case 10 is connected to the handle 130 in an integrally rotated state.

  In the same manner as described above, the advance / retreat member 42 is screwed to the rotation member 28 with a male screw 44 and a female screw 46, and the advance / retreat member 42 is moved forward and backward in the left-right direction in the drawing based on the rotation of the rotation member 28. It has become.

  Also in this embodiment, a rotation stop mechanism 48 is provided between the advance / retreat member 42 and the valve case 10, and the advance / retreat member 42 is advanced / retreated by the rotation of the rotary member 28 by the rotation stop action of the rotation stop mechanism 48. It can be moved.

As described above, the main valve body 108 is formed integrally with the temperature adjustment shaft 118 and is moved integrally with the temperature adjustment shaft 118 in the left-right direction in the figure.
The temperature adjusting shaft 118 has a small diameter portion 132 on the left side in the drawing, and a second advancing / retracting member 134 having a cylindrical shape is fitted to the small diameter portion 132 so as to be relatively movable in the axial direction. .
The left end of the bias spring 128 in the figure is brought into contact with the advance / retreat member 134.

The operating force applied from the handle 130 is transmitted to the main valve body 108 via the bias spring 128 by the forward / backward movement of the advance / retreat member 42 and the second advance / retreat member 134 in the horizontal direction in the figure.
Note that slip washers 135 are provided at both axial ends of the cylindrical advance / retreat member 134, and the bias spring 128 is brought into contact with the advance / retreat member 134 via the slip washer 135.

A buffer spring mechanism 54 having a buffer spring 56 as a main element is interposed between the first advance / retreat member 42 and the second advance / retreat member 134.
In this embodiment, the buffer spring mechanism 54 has a pair of left and right slip washers 140, 142 in the figure, and the spring force of the buffer spring 56 is exerted on the advance / retreat member 134 via these slip washers 140, 142. It has become.

Specifically, concave portions 136 and 138 are provided at positions corresponding to the radial direction on the inner peripheral side of the advance / retreat member 42 and the outer peripheral side of the advance / retreat member 134, and the slip washers 140 and 142 are provided on the inner peripheral side. A portion is inserted into the recess 138 of the advance / retreat member 134, and a portion on the outer peripheral side is inserted into the recess 136 of the advance / retreat member 42, and is provided across the recesses 136, 138.
The buffer spring 56 abuts both ends in the left-right direction against the slip washers 140 and 142 and applies the spring force to the advance / retreat member 134 via the slip washers 140 and 142.

  On the other hand, the anti-rotation mechanism 48 includes a pair of engaging claws 64 and 66 projecting radially outward from the advancing / retracting member 42 at a position separated by 180 ° in the circumferential direction as shown in FIG. A pair of corresponding guide grooves 68, 70 provided in the guide groove 68, 70, and the corresponding pair of engagement claws 64, 66 are movable in the axial direction and not movable in the rotational direction. Is being laid in.

  In this embodiment, as shown in FIG. 7 (I), the rotation stop mechanism 48 has the advancing / retracting member 42 advanced in the right direction in the drawing (the pair of engaging claws 64, 66 are shown in FIG. 9). After the water-side main valve 110 comes into contact with the water-side main valve seat 114 and closes, the advance / retreat member 42 further moves forward by the first set stroke. When moved, as shown in FIGS. 7 (II) and 10 (A), the engaging claws 64, 66 are disengaged from the engaging grooves 68, 70 to release the anti-rotation action, and the advance / retreat member 42 is rotated. The member 28 is idled together with the rotation in the arrow direction (positive direction) in FIG. About the structure and an effect | action, it is the same as that of embodiment shown in FIGS.

  Further, in this embodiment, as shown in FIG. 8 (I), the rotation stop mechanism 48 moves the retreating member 42 backward in the left direction in the drawing by the rotation of the rotating member 28 in the arrow direction (reverse direction) in FIG. After the hot water side main valve 112 has contacted the hot water side main valve seat 116 and closed, when the advance / retreat member 42 has further moved backward by the second set stroke, FIG. 8 (II) and FIG. 10 (B) ), The pair of engaging claws 64 and 66 are disengaged from the engaging grooves 68 and 70 to release the anti-rotation action.

By releasing the anti-rotation action by the anti-rotation mechanism 48, the advance / retreat member 42 idles in the direction of the arrow in FIG. 8 together with the rotation member 28, and the advance / retreat member 42 stops moving backward despite the reverse rotation of the rotation member 28. To do.
That is, when the advancing / retreating member 42 moves backward in the left direction in FIG. 8 and the engaging claws 64, 66 move in the guide grooves 68, 70 in the left direction in FIG. 9 as shown in FIG. As shown, the engaging claws 64, 66 are disengaged from the guide grooves 68, 70, and rotate integrally with the reverse rotation of the rotating member 28 along the sliding surface 146. 8 is released, and the advance / retreat member 42 is idled in the direction of the arrow in FIG.

  Further, when rotating in the forward direction as much as the idle rotation in the reverse direction rotation, that is, in the direction of the arrow in FIG. 7, the pair of engaging claws 64 and 68 are again guided by the stopper action of the stopper portion 144 to the guide grooves 68 and 70. In this case, the rotation stop mechanism 48 recovers the rotation stoppage again, and the advance / retreat member 42 is moved forward in the right direction in FIG. 6 based on the rotation of the rotation member 28 in the arrow direction in FIG. Move it.

  As shown in FIG. 6, in this embodiment, a pair of contact portions 148 and 150 are provided at both ends of the small diameter portion 132 of the temperature control shaft 118, and the second advancing and retracting member 134 is provided with these contact portions 148 and 150. , The forward / backward movement of the forward / backward member 42 is transmitted from the second forward / backward member 134 to the temperature adjustment shaft 118 via the buffer spring mechanism 54 without passing through the bias spring 128, and is moved.

Next, the operation of this embodiment will be described below.
In this embodiment, when the rotating member 28 is rotated in the arrow direction (positive direction) in FIG. 7 under the open state of the water side main valve 110 and the hot water side main valve 112 as shown in FIG. The advance / retreat member 42 moves forward in the right direction in the figure by screw feed.
The forward movement is transmitted to the second advance / retreat member 134 via the buffer spring mechanism 54, and the advance / retreat member 134 is moved forward to the right in the drawing while the bias spring 128 is bent.
As a result, the temperature adjusting shaft 118 moves to the right in the figure, and the set temperature of the mixed water is changed to the high temperature side.

Conversely, when the rotating member 28 is rotated in the direction opposite to the arrow direction in FIG. 7 (the arrow direction in FIG. 8), the second advancing / retracting member 134 moves backward in the same way to the left in the figure, and the bias spring 128 Reduce the biasing force.
Here, the main valve body 108 moves to the left in the figure, and the set temperature of the mixed water is changed to the low sound side.

In this state, when the temperature of the mixed water in the mixing chamber 104 is higher than the set temperature, the temperature sensing spring 126 increases the urging force to slightly move the main valve body 108 in the left direction in the figure, and the water-side main valve 110 is opened. The mixed water temperature is lowered by increasing the degree and decreasing the valve opening of the hot water main valve 112.
Further, when the temperature of the mixed water in the mixing chamber 104 is lower than the set temperature, the urging force of the temperature sensing spring 126 is reduced, whereby the main valve body 108 moves rightward in the figure and the water side main valve 110 is moved. The valve opening is made small and the hot water main valve 112 is made large to raise the mixed water temperature.
Then, by such automatic position movement of the main valve body 108, the mixed water temperature is automatically adjusted to the set temperature.

In this embodiment, when the water side main valve 110 is forcibly closed and the hot water side main valve 112 is forcibly fully opened, the handle 130 rotates the rotating member 28 in the direction of the arrow (positive direction) in FIG. Let
At this time, the forward movement of the advance / retreat member 42 in the right direction in the figure is transmitted to the second advance / retreat member 134 via the buffer spring mechanism 54 in the same manner as described above, and the advance / retreat member 134 deflects the bias spring 128 in the right direction in the figure. Move forward greatly.
Then, the movement is transmitted to the temperature adjusting shaft 118, and the water side main valve 110 is brought into contact with the water side main valve seat 114 to be closed. In addition, the hot water main valve 112 is fully opened.

The advancing / retracting member 42 continues to move forward in the right direction in the figure, and the second advancing / retreating member 134 moves forward in the right direction in the drawing accordingly.
In this process, the advancing / retreating member 134 abuts against the abutting portion 148 of the temperature adjusting shaft 118 (see FIG. 7I), and thereafter, the forward movement force is applied to the temperature adjusting shaft 118 without passing through the bias spring 128, that is, the main adjusting shaft 118. It affects the valve 110.

Thus, when the advancing / retreating member 42 further moves rightward in the figure under this state, the water side main valve 110, that is, the main valve body 118 and the temperature adjusting shaft 118 are in a stopped state. Thereafter, the buffer spring 56 of the buffer spring mechanism 54 bends and absorbs further forward movement of the advance / retreat member 42 as shown in FIG.
As a result, the spring force of the buffer spring 56 acts as an elastic pressing force of the water side main valve 110 against the water side main valve seat 114, so that the water side main valve 110 is closed under a certain elastic force. Pressed and held.

When the advancing / retracting member 42 further moves forward in the drawing from this state, when the advancing / retreating member 42 moves forward by the first set stroke, the pair of engaging claws 64, 66 are disengaged from the corresponding guide grooves 68, 70 ( 10A). Here, the anti-rotation action of the anti-rotation mechanism 48 is released, and thereafter, the advancing / retreating member 42 is idled together with the rotating member 28 in the forward direction (the arrow direction in FIG. 7). FIG. 7 (II) shows the state at this time.
Here, the forward movement of the advance / retreat member 42 in the right direction in the figure stops. Accordingly, the increase in the pressing force to the water side main valve 110 due to the forward movement of the advance / retreat member 42 in the right direction in the drawing is also stopped.

On the other hand, when the rotary member 28 is rotated in the direction of the arrow in FIG. 8 (the direction opposite to the arrow in FIG. 7), the advance / retreat member 42 is idled integrally with the rotary member 28 in the reverse direction by the amount of idle rotation in the forward direction. At the time of rotation, the anti-rotation action by the anti-rotation mechanism 48 is restored, and the advance / retreat member 42 moves backward in the left direction in FIG. 6 as the rotation member 28 rotates in the reverse direction.
Then, at a certain point, the buffer spring 56 returns to the initial state, and the backward movement of the forward / backward member 42 in the left direction in the drawing is transmitted to the second forward / backward member 134 to be moved backward.

After that, when the advance / retreat member 134 comes into contact with the contact portion 150 of the temperature control shaft 118, the temperature control shaft 118 is pulled in the left direction in FIG. Moves to the left in the figure.
As a result, the water side main valve 110 moves in the valve opening direction and the hot water side main valve 112 moves in the valve closing direction. Finally, the hot water side main valve 112 comes into contact with the hot water side main valve seat 116 and closes. (FIG. 8I).

In this state, when the advance / retreat member 42 further moves backward in the left direction in FIG. 8, the buffer spring 56 is bent again, and the elastic force acts as a pressing force for holding the hot water main valve 112 closed.
Further, when the advance / retreat member 42 moves backward in the left direction in FIG. 8, the advance / retreat member 42 becomes the second after the hot water main valve 112 is closed, as shown in FIGS. 8 (II) and 10 (B). When moved by the set stroke, the pair of engaging claws 64 and 66 in the locking mechanism 48 are disengaged from the corresponding guide grooves 68 and 70, and the locking action on the advance / retreat member 42 by the locking mechanism 48 is released.
Therefore, after that, as the rotating member 28 rotates, the advance / retreat member 42 slides the pair of engaging claws 64 and 66 along the sliding surface 146 as shown in FIG. Rotate idly in the opposite direction.

  Then, when the rotary member 28 is rotated in the forward direction by the handle 130, the advance / retreat member 42 integrally rotates in the forward direction together with this, and is previously idled in the forward direction by the amount of idle rotation in the opposite direction. Then, the pair of engaging claws 64 and 66 are again engaged with the corresponding guide grooves 68 and 70 by the stopper action of the stopper portion 144, where the rotation stopping action of the rotation stopping mechanism 48 is recovered and rotated. As the member 28 further rotates in the forward direction, the advance / retreat member 42 moves forward in the right direction in FIG. 8, and transmits its own advance movement to the advance / retreat member 134 via the pair of slip washers 140, 142 in the buffer spring mechanism 54. In this state, a further forward movement of the advance / retreat member 42 in the right direction in the drawing is transmitted to the temperature adjusting shaft 118, the main valve body 108 moves rightward, and the hot water side main valve 11 is moved. It is referred to as open state.

  11 represents the rotation stroke of the handle 130 until the advance / retreat member 42, that is, the handle 130 is idly rotated after the water-side main valve 110 is closed in the above operation. The rotation strokes of the handle 130 from the time when the hot water main valve 112 is closed to the time when the advance / retreat member 42, that is, the handle 130 rotates idly are shown.

According to this embodiment, after the water-side main valve 110 and the hot-water main valve 112 are closed in the hot / cold water mixing valve with an automatic temperature control function, the operation load on the handle 130 becomes larger than necessary and the operation is heavy. Thus, the handle 130 can be lightly operated.
In addition, even in such a case, the water-side main valve 110 and the hot water-side main valve 112 can be held in a closed state with a predetermined pressing force by the elastic force due to the bending of the buffer spring 56, and the water stoppage can be improved. it can.
Further, since the buffer spring 56 bends unnecessarily greatly, the reaction force causes the handle 130 to rotate freely to the return side by screw feed by the screw portion between the advance / retreat member 42 and the rotation member 48. The problem can be solved.

12 to 14 show still another embodiment of the present invention.
This example is also an example when the present invention is applied to a hot / cold water mixing valve (non-pilot hot / cold water mixing valve).
As shown in FIG. 12, in this example, the buffer spring 56 in the buffer spring mechanism 54 is configured to serve as the bias spring 128 in FIG.
Therefore, in this embodiment, the second advance / retreat member 134 shown in FIG. 6 is omitted, and the buffer spring mechanism 54 is directly interposed between the advance / retreat member 42 and the temperature adjusting shaft 118.

Specifically, the recess 138 in the advance / retreat member 134 is formed between the small diameter portion 132 of the temperature control shaft 118 and the contact portions 148, 150 at both ends in the axial direction, and the recess 138 and the recess 136 of the advance / retreat member 42. A buffer spring mechanism 54 is interposed between the two.
The other points are basically the same as those of the embodiment shown in FIGS. 6 to 10, and only the reference numerals corresponding to the corresponding portions are shown, and further detailed description is omitted.

FIG. 13 shows the operation when the water-side main valve 110 is forcibly closed in this embodiment. The action of the buffer spring mechanism 54 and the rotation stop mechanism 48 at that time is basically shown in FIG. It is the same as that.
FIG. 14 shows the operation when the hot water main valve 112 is forcibly closed. The actions of the buffer spring mechanism 54 and the rotation stop mechanism 48 are basically the same as those shown in FIG.

15 to 17 show another embodiment of the present invention.
In this example, in the hot and cold water mixing valve shown in FIG. 6, the main valve body 108, the temperature sensitive spring 126, and the bias spring 128 are assembled to the temperature adjusting shaft 118 as shown in FIG. It is the example comprised as the valve unit 154 which moves to an axial direction.

Specifically, in this example, the main valve body 108 is configured separately from the temperature control shaft 118, and the main valve body 108 is fitted and held on the small diameter portion 156 of the temperature control shaft 118 so as to be relatively movable in the axial direction. Has been.
The temperature control shaft 118 is provided with a pair of left and right flange-shaped spring receiving portions 158 and 160, and a temperature sensitive spring 126 is interposed between the right spring receiving portion 158 and the main valve body 108, and A bias spring 128 is interposed between the left spring receiving portion 160 and the main valve body 108.
The urging force of the temperature-sensitive spring 126 and the urging force of the bias spring 128 are exerted on the main valve body 108 in the opposite directions in the axial direction.

The temperature control shaft 118 is provided with contact portions 148 and 150 on the right side and the left side of the main valve body 108 in the figure, and the temperature control shaft 118 is brought into contact with the main valve body 108. The main valve body 108 is moved in the same right direction by forward movement in the right direction in the figure, and the water side main valve 110 is forcibly closed (FIG. 16 (I)).
Further, the abutting portion 148 is brought into contact with the main valve body 108, and the main valve body 108 is moved in the same left direction by the backward movement of the temperature adjusting shaft 118 leftward in the drawing, so that the hot water main valve 112 is forcibly closed ( FIG. 17 (I)).
A clearance necessary for the automatic temperature control operation of the main valve body 108 is secured between the contact portions 148 and 150 and the main valve body 108.

The right end of the temperature adjusting shaft 118 is inserted into the fitting hole 162 of the valve case 10 so as to be movable in the axial direction, and the left end is fixed to the second advancing / retracting member 134 with a retaining ring 164, The temperature adjusting shaft 118 is moved in the left-right direction integrally with the advance / retreat movement of the advance / retreat member 134 in the left-right direction in the drawing.
In addition, about another structure, it is the same as that of embodiment shown in FIGS. 6-10, Only the code | symbol corresponding to a corresponding part is shown and the further detailed description is abbreviate | omitted.

  In this embodiment, when the temperature adjustment axis is moved in the left-right direction in the drawing, for example, the right direction in order to change the set temperature of the mixed water temperature, the temperature-sensitive spring 126 and the bias spring 128 maintain a constant length as a whole. However, the main valve body 108, the temperature sensitive spring 126, and the bias spring 128 move integrally with the temperature adjusting shaft 118 in the right direction. Further, when the temperature adjusting shaft 118 is moved in the left direction in the figure, they are also moved integrally in the left direction in the figure.

When the temperature of the mixed water rises in this state, the main valve element 108 is finely moved (shifted) in the left direction in the drawing based on the increase of the urging force by the temperature-sensitive spring 126. That is, the position of the main valve body 108 is finely moved (shifted) in the direction in which the water-side main valve 110 is opened and the hot water-side main valve 112 is closed, and the mixed water temperature is automatically lowered to the set temperature. To do.
Conversely, when the temperature of the mixed water becomes lower than the set temperature, the main valve element 108 is finely moved in the right direction in the drawing based on the decrease in the urging force of the temperature sensing spring 126, and the position of the main valve element 108 is moved to the high temperature side. Shift to automatically adjust the mixed water temperature to the set temperature.

FIG. 16 shows the operation when the water-side main valve 110 is forcibly closed, and its operation is basically the same as that shown in FIG.
FIG. 17 shows the operation when the hot water main valve 112 is forcibly closed, and its operation is basically the same as that shown in FIG.

According to this embodiment, when the temperature adjusting shaft 118 is moved forward and backward by the rotation of the handle 130, it is not necessary to move the temperature adjusting shaft 118 against the biasing force while bending the bias spring 128, and therefore, buffering is performed. The spring force of the buffer spring 56 in the spring mechanism 54 can be made as small as possible.
Thereby, the operation load of the handle 130 after the water-side main valve 110 and the hot water-side main valve 112 are closed can be further reduced, and further light operation can be realized.
Moreover, since a thing with small spring force can be used as the buffer spring 56, the sliding resistance at the time of making the advance / retreat member 42 idle | rotate with the rotation member 28 can be made small.

  18 to 20, the buffer spring 56 is configured also as a bias spring in the same manner as the embodiment shown in FIGS. 12 to 14, and the temperature adjusting shaft 118 is also shown in the same manner as shown in FIGS. 15 to 17. In this example, the main valve body 108, the temperature-sensitive spring 126, and the buffer spring 128 that also functions as a bias spring are held separately, and these are configured as a valve unit 154.

In this example, the temperature control shaft 118 is configured integrally with the advance / retreat member 42, and the cylindrical portion 166 provided on the center side of the main valve body 108 is loosely fitted to the small diameter portion 156 of the temperature control shaft 118. Is assembled and held so as to be relatively movable in the left-right direction in the figure.
The cylindrical portion 166 extends in the left direction in the figure, and extends over the concave portion 138 formed on the outer peripheral side of the cylindrical portion 166 and the concave portion 136 of the large-diameter cylindrical portion 168 of the advancing / retracting member 42. A spring mechanism 54 is provided.

In this embodiment, the right end of the temperature-sensitive spring 126 in the figure is received by the temperature adjusting shaft 118 side, and the urging force of the temperature-sensitive spring 126 is applied to the main valve body 108 in the left direction in the figure.
Further, the left end of the buffer spring 128 also serving as a bias spring in the figure is received by the cylindrical portion 168 of the advance / retreat member 42, that is, the temperature adjusting shaft 118 side integral therewith, and the biasing force of the bias spring 128 is mainly transmitted through the cylindrical portion 166. It acts on the valve body 108 in the right direction in the figure.

Also in this embodiment, when the advance / retreat member 42 is moved forward / backward in the right direction in the drawing, the temperature adjusting shaft 118 is moved forward / backward in the right direction in the drawing together with this.
At this time, the main valve body 108, the temperature sensing spring 126, and the buffer spring 128 serving as a bias spring assembled to the temperature control shaft 118 move in the left-right direction integrally with the temperature control shaft 118. At this time, the temperature-sensitive spring 126 and the buffer spring 128 move together with the temperature adjusting shaft 118 while maintaining the total length thereof constant.
In this embodiment, the other configurations are basically the same as those in the embodiment shown in FIGS. 6 to 10, and only the reference numerals corresponding to the corresponding portions are shown, and detailed description thereof is omitted.

FIG. 19 shows the operation when the water-side main valve 12 is forcibly closed in this embodiment, and its action is basically the same as that shown in FIG.
FIG. 20 shows an operation when the hot water main valve 112 is forcibly closed, and its operation is basically the same as that shown in FIG.

21 to 25 show still another embodiment of the present invention.
In this example, a hot and cold water mixing valve with an automatic temperature control function is configured as a pilot valve.
In this example, the cylindrical portion 32 of the rotating member 28 is disposed between the small-diameter cylindrical portion 10A of the valve case 10 and the cylindrical operation side case 174, and further, the first advance and retreat that forms a cylindrical shape inside thereof. The member 42 is further provided with a second advancing / retreating member 134 having a bottomed cylindrical shape inside thereof.

Here, the rotation member 28 is rotatably fitted in the fitting hole 34 of the operation unit side case 174 and the axial position of the rotation member 28 is regulated in the axial direction with respect to the operation unit side case 174 by the retaining ring 40 and the cylindrical portion. ing.
The second advance / retreat member 134 is fitted to the cylindrical portion 10A of the valve case 10 so as to be relatively movable in the axial direction.

In this embodiment, the rotating member 28 and the advance / retreat member 42 are screwed together by a male screw 44 and a female screw 46, and a buffer spring mechanism 54 is interposed between the advance / retreat members 42 and 134. Further, this embodiment is the same as the embodiment shown in FIGS. 6 to 10 in that a rotation stop mechanism 48 is provided between the advance / retreat member 42 and the valve case 10 (specifically, the cylindrical portion 10A).
The configuration of the buffer spring mechanism 54 and the configuration of the rotation stop mechanism 48 are basically the same as those in the above embodiment.

In this embodiment, the valve case 10 is provided with a water inlet 12 and a hot water inlet 100, but the positional relationship is opposite to that shown in FIG.
In this embodiment, the water-side main valve 110 is also configured as a diaphragm valve.
As shown in detail in FIG. 23, the water-side main valve 110 is composed of a hard main valve main body 82 and a rubber diaphragm film 84, and the diaphragm film 84 is fixed to the valve case 10 at the outer periphery. Has been.

A back pressure chamber (water side back pressure chamber) 81 is formed on the left side of the water side main valve 110 in the figure, and the back pressure chamber 81 is configured to transfer the internal pressure to the water side main valve 110 in the right direction in the figure. It acts as a pressing force in the valve closing direction.
The water-side main valve 110 is closed by abutting against a water-side main valve seat 114 provided in the valve case 10, and is then opened by being separated in the left direction in the figure.

In this embodiment, the hot water main valve 112 is integrally formed with the water main valve 110 (strictly speaking, the hot water main valve 112 is connected to the cylindrical portion of the main valve body 108 by screw connection. ing).
Specifically, the hot water main valve 112 is configured integrally with the main valve body 82 of the water main valve 110 (in a state of being integrally moved), and the hot water main valve 112 is located on the left side in the drawing. The valve abuts against the seat 116 and closes.

The water-side main valve 110 is provided with an introduction small hole (water-side introduction small hole) 83 penetrating the water-side main valve 110, and the primary water from the water inlet 12 is back-pressured through the introduction small hole 83. Introduced into the chamber 81, the pressure of the back pressure chamber 81 is increased.
Further, as shown in FIG. 23, the water-side main valve 110 has a pilot hole (water-side pilot hole) that communicates with the back pressure chamber 81 and the secondary side downstream of the water-side main valve 110 at the center thereof. 96 is provided through the water-side main valve 110, and the water in the back pressure chamber 81 is drawn downstream through the pilot hole 96, whereby the pressure in the back pressure chamber 81 decreases. .

Reference numeral 78 denotes a pilot valve (water-side pilot valve) that controls the opening degree of the pilot hole 96. The water-side main valve 110 follows the movement of the pilot valve 78 in the left-right direction in the figure and follows the left and right in the figure. It can be moved in the direction.
Here, the pilot valve 78 abuts on a pilot valve seat (water-side pilot valve seat) 88 formed on the water-side main valve 110 and closes.
Further, the valve is opened by separating in the left direction in the figure, and the pilot hole 96 is opened.
The pilot valve 78 is provided with an annular groove, and a seal ring 176 is held there. The seal ring 176 provides a watertight seal between the pilot valve 78 and the valve case 10.

In this embodiment, when the pilot valve 78 moves in the left-right direction in the figure, the water-side main valve 110 follows the same and moves in the same direction, and the hot water-side main valve 112 also moves integrally in the same direction. . As a result, the water-side main valve 110 and the hot water-side main valve 112 change the respective valve openings in magnitudes in opposite relations.
In FIG. 23, reference numeral 178 denotes a through hole forming a part of the pilot hole 96, and water from the back pressure chamber 81 flows out downstream through the pilot hole 96 including the through hole 178.

As shown in FIG. 22, the water-side main valve 110 and the hot water-side main valve 112 are configured separately from the temperature adjustment shaft 118.
Sleeves 180-1, 180-2, 180-3, and 180-4 are fitted to the temperature adjusting shaft 118 in an externally fitted state.
The pilot valve 78 is integrally formed with the sleeve 180-1 at the center in the figure so as to protrude radially outward.
Further, the main valve body 108 integrally having the water side main valve 110 and the hot water side main valve 112 is externally fitted to the sleeve 180-1 so as to be movable in the left-right direction and the axial direction.

Here, the sleeve 180-3 is defined with a retaining ring at the right end in the figure with respect to the temperature adjusting shaft 118, and the sleeve 180-4 is also defined with the retaining ring at the left end in the figure with respect to the temperature adjusting shaft 118. Yes.
The temperature sensitive spring 126 is interposed between the flange portions 182 of the sleeves 180-2 and 180-3, and the urging force thereof is directed leftward in the figure with respect to the sleeve 180-1, that is, with respect to the pilot valve 78. It is affecting.
Further, a bias spring 128 is interposed between the flange portion 182 of the sleeve 180-4 and the pilot valve 78, and exerts its urging force to the sleeve 180-1, that is, to the pilot valve 78 in the right direction in the figure. Yes.

  As is apparent from the above description, in this embodiment, the pilot valve 78 is held by the temperature adjusting shaft 118 in a state in which the pilot valve 78 can move relative to the temperature adjusting shaft 118 in the left-right axial direction in the figure. A temperature-sensitive spring 126 and a bias spring 128 disposed on the right and left sides in the drawing exert a biasing force in the opposite direction with respect to the pilot valve 78, and the temperature-sensitive spring 126 and the bias spring 128 total. These are assembled to the temperature adjustment shaft 118 so as to move together with the temperature control shaft 118 together with the pilot valve 78 while keeping the length of the pilot valve 78 constant, thereby constituting the pilot valve unit 184 as a whole.

As shown in FIG. 21, the temperature adjustment shaft 118 is fixed to the bottom of the second advance / retreat member 134 with a retaining ring at the left end in the drawing, and the temperature adjustment shaft 118 is integrated with the advance / retreat member 134. It is designed to move left and right.
The right end of the temperature adjusting shaft 118 in the figure is inserted and held in the fitting hole 162 of the valve case 10 so as to be movable in the axial direction.

In the case of this embodiment, when the pilot valve 78 moves integrally with the sleeve 180-1 in the left-right direction in the figure, the pressure in the back pressure chamber 81 increases or decreases. Based on this, the main valve body 108 is the same as the pilot valve 78. Move following the direction.
That is, when the pilot valve 78 moves rightward in the figure, the water side main valve 110 moves in the valve closing direction, the hot water side main valve 112 follows the valve opening direction, and the pilot valve 78 moves leftward in the figure. Then, the water side main valve 110 follows this and moves in the valve opening direction, and the hot water side main valve 112 moves in the valve closing direction.

  In this embodiment, the second advancing / retracting member 134 is pushed to the full in the right direction in the drawing, so that the pilot valve 78 abuts on the pilot valve seat 88 formed on the water-side main valve 110 and closes, The water side main valve 110 is pressed against the water side main valve seat 114 to close it.

  Further, when the advancing / retracting member 134 is pulled in the left direction in the figure, the temperature adjusting shaft 118 moves to the left in the figure, and at this time, the sleeve 180-3 at the right end in the figure fitted to the temperature adjusting shaft 118 is adjacent to the temperature adjusting shaft 118. The main valve body 108 is moved to the left in the figure by contacting the sleeve 180-2, and then the main valve body 108, and the hot water main valve 112 is brought into contact with the hot water main valve seat 116. Let this be forcibly closed.

  In the case of this embodiment, since the pressure of the back pressure chamber 81 bears a part of the force required to close the water side main valve 110 and stop the water, the hot water side main valve 112 is further forcibly closed to stop the water. Since the primary side water supply pressure of the water-side main valve 110 bears the force necessary to do this, the spring force of the buffer spring 56 in the buffer spring mechanism 54 can be set small.

  In this embodiment, the water-side main valve 110 and the hot water-side main valve 112 are configured to move together, and the water-side main valve 110 is used as a drive valve to move following the movement of the pilot valve 78. The water side main valve and the hot water side main valve are provided so as to move together, a hot water side back pressure chamber is formed behind the hot water side main valve, and the primary side from the hot water inlet Instead of providing an inlet small hole for introducing hot water (hot water) into the hot water back pressure chamber, a hot water pilot hole for extracting hot water in the hot water back pressure chamber to the secondary side, and providing a water pilot valve It is also possible to provide a hot water side pilot valve, move the hot water side main valve by following the movement of the hot water side pilot valve, and move the water side main valve integrally with the hot water side main valve as a drive valve. Is possible.

  Alternatively, the water side main valve and the hot water side main valve are provided separately and independently so that the water side back pressure chamber is located behind the water side main valve and the hot water side is located behind the hot water side main valve. The back pressure chamber is further provided with a water side introduction small hole, a hot water side introduction small hole, a water side pilot hole, and a hot water side pilot hole for increasing and decreasing the pressure of the water side back pressure chamber and the hot water side back pressure chamber, respectively. By moving the pilot valve and the hot water side pilot valve in the axial direction synchronously, the water side main valve and the hot water side main valve may be configured to change the valve opening in a reverse relationship. Is possible.

FIG. 24 shows the operation when the water side main valve is forcibly closed in this embodiment, and FIG. 25 shows the operation when the hot water side main valve is forcibly closed.
In this embodiment, the leftward movement in the drawing of the advance / retreat member 42 and the temperature adjusting shaft 118 is a forward movement, and the rightward movement is a backward movement.

Although the embodiment of the present invention has been described in detail above, the present invention includes a temperature sensing element that encloses wax therein and expands and contracts in the axial direction due to the expansion and contraction of the wax due to a change in mixed water temperature. It is also possible to apply to a hot and cold water mixing valve that automatically adjusts the temperature of the mixed water based on the above, or a so-called mixing type hot and cold water mixing valve that does not include such a temperature sensing element or bias spring.
It is also possible to provide an engaging claw on the valve case side and a guide groove on the advancing / retracting member side to prevent the advancing / retreating member from rotating. In addition, in a hot and cold water mixing valve, it is also possible to idle the advance / retreat member only after closing the water side main valve, or to idle the rotation member only after the hot water side main valve is closed. For example, the present invention can be configured in various forms without departing from the spirit of the present invention.

It is the figure which showed the valve | bulb of the single water tap of one Embodiment of this invention. It is operation | movement explanatory drawing of the embodiment. It is operation | movement explanatory drawing of the principal part of the same embodiment. It is the figure which showed other embodiment of this invention. It is operation | movement explanatory drawing of the embodiment. It is a figure of the hot and cold water mixing valve of still another embodiment of the present invention. It is operation | movement explanatory drawing of the embodiment. FIG. 8 is an operation explanatory diagram different from FIG. 7. It is the figure which showed the principal part of the same embodiment. It is a figure explaining the motion of the engaging claw of the embodiment. It is a figure showing a handle of the embodiment. It is the figure which showed other embodiment of this invention. It is operation | movement explanatory drawing of the embodiment. FIG. 14 is an operation explanatory diagram different from FIG. 13. It is the figure which showed other embodiment of this invention. It is operation | movement explanatory drawing of the embodiment. FIG. 17 is an operation explanatory diagram different from FIG. 16. It is the figure which showed other embodiment of this invention. It is operation | movement explanatory drawing of the embodiment. FIG. 20 is an operation explanatory diagram different from FIG. 19. It is the figure which showed other embodiment of this invention. It is a figure of the pilot valve unit in FIG. It is the figure which expanded and showed the principal part of FIG. It is operation | movement explanatory drawing of the embodiment. FIG. 25 is an operation explanatory diagram different from FIG. 24. It is a figure which shows an example of the conventional hot water mixing valve.

Explanation of symbols

10 Valve case 12 Water inlet (first inlet)
20 Main valve (first main valve)
22 Main valve seat (first main valve seat)
28 Rotating member 42, 134 Advance / Retreat member 48 Rotation stop mechanism 54 Buffer spring mechanism 56 Buffer spring 64, 66 Engaging claw 68, 70 Guide groove 78 Pilot valve 80 Main valve 81 Back pressure chamber 83 Introduction small hole 86 Pilot hole 100 Hot water flow Inlet 108 Main valve body 110 Water side main valve 112 Hot water side main valve 114 Water side main valve seat 116 Hot water side main valve seat 118 Temperature control shaft 126 Temperature sensing spring 128 Bias spring 154 Valve unit

Claims (8)

(A) a first main valve provided inside the valve case and moving forward and backward toward the first main valve seat to change the valve opening; (b) a rotating member on the handle side; and (c) the rotation. The first main valve is moved in the opening / closing direction by being screw-coupled to the member, and being rotated by the rotation mechanism with respect to the valve case, and being moved forward and backward in the axial direction by rotation of the rotating member. A faucet valve that controls an inflow amount of water into the valve case from a first inlet provided in the valve case in accordance with a valve opening degree of the first main valve. Because
Intervene between the advance / retreat member and the first main valve, transmit the advance / retreat movement of the advance / retreat member to the first main valve, move the first main valve in the opening / closing direction, and change the valve opening degree. After the first main valve abuts on the first main valve seat and closes and stops moving, the advancing and retreating member after the first main valve is closed is further bent by bending the buffer spring. While providing a buffer spring mechanism that absorbs forward movement,
(A) an engaging claw provided in a radially projecting state on one of the advance / retreat member side and the valve case side; and (b) the engaging claw provided on the other side. Including a guide groove that can be moved in the axial direction and immovable in the rotational direction.
In addition, after the first main valve is closed, the anti-rotation mechanism releases the anti-rotation action by the engagement claw being released from the guide groove after the advance / retreat member has moved forward by the first set stroke, and the advance / retreat mechanism is released. After rotating the member integrally with the rotation of the rotating member in the forward direction of the direction of closing the first main valve of the rotating member, and idly rotating in the opposite direction as the idle rotation of the forward direction. The valve for mixing hot and cold water of the faucet is characterized in that the engaging claw is again engaged with the guide groove to restore the stopping action. (A) As a first main valve provided inside the valve case, which moves forward and backward toward the water-side main valve seat as the first main valve seat and changes the valve opening degree by the forward and backward movement of the temperature control shaft. A water side main valve and a hot water side main valve as a second main valve that moves forward and backward toward the hot water side main valve seat as the second main valve seat to change the valve opening; and (b) rotation on the handle side. A member, and (c) a screw member coupled to the rotating member, and a forward / backward member that is rotated by the rotation mechanism with respect to the valve case and is moved forward and backward by screw feed in the axial direction by the rotation of the rotating member; The temperature adjustment shaft is moved forward and backward through a buffer spring mechanism by the forward and backward movement of the advance / retreat member, and the water side main valve is closed and the hot water side main valve is opened by advancement of the temperature adjustment shaft. Further, the water-side main valve is moved in the opening direction and the hot water-side main valve is moved in the closing direction by the backward movement of the temperature control shaft, A water faucet mixing valve for controlling the inflow of cold water and hot water from the cold water inlet as the first inlet and the hot water inlet as the second inlet into the valve case. There,
The anti-rotation mechanism includes: (a) an engagement claw provided in a radially projecting state on one of the advance / retreat member side and the valve case side; and (b) the engagement claw provided on the other side. Including a guide groove that is movable in the axial direction and immovably engaged in the rotational direction,
After the water-side main valve contacts the water-side main valve seat and closes and stops moving, the buffer spring mechanism is configured so that the buffer-side spring is bent so that the water-side main valve is closed after the water-side main valve is closed. After the forward movement of the advancing / retreating member is absorbed, and the hot water side main valve is in contact with the hot water side main valve seat to close and stop moving, the hot water side main valve is bent by bending the buffer spring. It absorbs further backward movement of the advance / retreat member after the valve is closed,
Furthermore, after the water-side main valve is closed, the anti-rotation mechanism releases the anti-rotation action by the engagement claw coming off the guide groove after the advance / retreat member has moved forward by the first set stroke, and the advance / retreat mechanism is released. After rotating the member integrally with the rotation of the rotating member in the forward direction in the direction of closing the water-side main valve of the rotating member, and after idling in the opposite direction to the idle rotation in the forward direction , Whether the engagement pawl is again engaged with the guide groove to recover the anti-rotation action,
Or / and, after the hot water main valve is closed, the advancing / retracting member moves backward by the second set stroke, and then the engaging claw is released from the guide groove to release the anti-rotation action. Integrally with the rotation of the member, the rotating member is idly rotated in the reverse direction of the direction in which the hot water main valve is closed, and after idly rotating in the forward direction as much as the idling in the reverse direction, the engagement is again performed. A valve for mixing hot and cold water with a faucet, wherein the pawl is engaged with the guide groove to recover the rotation stopping action.   3. The water mixing valve according to claim 2, wherein the hot water mixing valve has an automatic temperature control function, and expands and contracts in the axial direction in response to the mixed water temperature, and when the mixed water becomes higher than the set temperature, A temperature sensing element that opens the main valve and moves the water side main valve and the hot water side main valve in a direction to close the hot water side main valve, and movement by the temperature sensing element with respect to the water side main valve and the hot water side main valve. A valve for mixing hot water with a faucet, comprising: a spring that applies a biasing force in a direction opposite to the direction.   4. The faucet mixing valve according to claim 3, wherein the temperature sensing element is a temperature sensing spring comprising a coil spring made of a shape memory alloy.   In Claim 4, the main valve body which has the said water side main valve and the hot water side main valve is comprised separately from the said temperature control axis | shaft, and this main valve body can move relatively with respect to this temperature control axis | shaft. The temperature control shaft is held, and the temperature control shaft further includes the temperature sensing spring and the bias spring on the opposite sides in the axial direction with respect to the main valve body. The temperature-sensitive spring and bias spring, together with the main valve body, keep the entire length constant as the temperature control shaft moves. A faucet mixing valve characterized in that it forms a valve unit that can be moved together. 2. The back pressure chamber according to claim 1, wherein the valve is formed behind the first main valve, and an internal pressure acts on the first main valve as a pressing force in a valve closing direction; and the first flow An introduction small hole for introducing primary water from the inlet into the back pressure chamber and increasing the pressure, and a pressure for extracting water from the back pressure chamber to the secondary side downstream of the first main valve and reducing the pressure. The pilot hole as a hole and the pilot valve seat formed in the first main valve move forward and backward, and the opening degree of the pilot hole is controlled to follow the first main valve in the same direction. A pilot valve having a pilot valve,
The first main valve is closed by contact of the pilot valve with the pilot valve seat, and the advance / retreat member moves the pilot valve, and the first main valve is moved via the pilot valve. A faucet hot and cold mixing valve characterized in that the valve is moved in the opening and closing direction. 4. The hot and cold water mixing valve according to claim 2, wherein the hot water / water mixing valve has a pilot valve, and an internal pressure is applied to the water side main valve and / or the hot water side main valve by the forward / backward movement of the pilot valve. Increase or decrease the pressure of the back pressure chamber that acts as a pressing force in the valve closing direction, move the water side main valve or / and the hot water side main valve in the opening / closing direction, and also close the water side when the water side main valve is closed It is a pilot type valve that fully opens the main valve synchronously, and opens the water side main valve synchronously when the hot water side main valve is closed,
The water valve of the faucet is characterized in that the pilot valve is held on the temperature control shaft, and the advance / retreat member moves the temperature control shaft forward and backward.   The pilot valve according to claim 7, wherein the pilot valve is configured separately from the temperature control shaft, the pilot valve is held by the temperature control shaft so as to be movable relative to the temperature control shaft, and A hot water mixing valve is provided with an automatic temperature control function, and the temperature control shaft further has a shape memory alloy as the temperature sensing element on the opposite sides of the pilot valve in the axial direction. A temperature-sensitive spring made of a coil spring made of metal and the bias spring are assembled and held in a state in which an urging force is exerted on the pilot valve in the axial direction opposite to the pilot valve. A faucet hot and cold mixing valve characterized in that it forms a pilot valve unit that can move together with the valve while keeping the entire length constant as the temperature control shaft moves.

Images