JP2008115890A - Hot water-water mixing valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water-water mixing valve for allowing smooth temperature setting or resetting operation by moving a temperature control shaft without receiving deformation resistance generated by a bias spring and a temperature sensitive spring. <P>SOLUTION: The hot water-water mixing valve with an automatic temperature control function comprises a main valve 20 having a water side valve 22 and a hot water side valve 24, the temperature control shaft 36 for repositioning the main valve 20, the temperature sensitive spring 48, and the bias spring 50. The main valve 20 is held so as to be relatively movable in the axial direction by the temperature control shaft 36, and the temperature sensitive spring 48 and the bias spring 50 are assembled to and held by the temperature control shaft 36. The temperature sensitive spring 48, the bias spring 50, the main valve 20, and the temperature control shaft 36 constitute a valve unit 52 and are integrally movable as a whole. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hot and cold mixing valve, and more particularly to a hot and cold mixing valve with an automatic temperature control function.

2. Description of the Related Art Conventionally, a hot water / water mixing valve having an automatic temperature control function (thermostat type) having a temperature-sensitive spring in a mixing chamber has been widely used.
The hot-water mixing valve with this automatic temperature control function is as follows, that is, (a) a main valve provided with a water-side valve portion and a hot-water-side valve portion provided separately in the axial direction, and (b) Temperature control shaft (temperature adjustment) that shifts the position of the water side valve part and the hot water side valve part in a direction to change the opening degree of the water side valve part and the hot water side valve part large or small in the opposite relationship by axial movement Shaft), and (c) a feeling of increasing the biasing force in response to an increase in the temperature of the mixed water and exerting a biasing force in the direction of increasing the opening degree of the water side valve part and decreasing the opening degree of the hot water side valve part. A temperature spring and (d) a bias spring that exerts an urging force opposite to that of the temperature sensitive spring, and the water side valve portion based on a change in a balance position of the urging forces of the temperature sensitive spring and the bias spring. A hot water mixing valve of a type that automatically adjusts the temperature of the mixed water by moving the position of the hot water side valve portion is known.
For example, Patent Document 1 listed below discloses a hot water / water mixing valve with an automatic temperature control function of this type.
FIG. 10 shows a specific example thereof.

In the figure, reference numerals 200 and 202 denote a water inflow passage and a hot water inflow passage formed in the valve case 204, and 206 denotes a water side valve portion 208 and a hot water side valve portion 210 which are provided apart from each other in the axial direction. It is a main valve provided with the connection part 212 connected in a direction.
The valve case 204 has a water side valve seat 214, a hot water side valve seat corresponding to the water side valve portion 208 and the hot water side valve portion 210, respectively, at a position between the water side valve portion 208 and the hot water side valve portion 210. 216 is provided, and the water side valve portion 208 and the hot water side valve portion 210 are in contact with each other.

  The main valve 206 is biased leftward in the drawing by the first bias spring 218 and the second bias spring 220, that is, in a direction to close the water side valve portion 208, and is provided in the mixing chamber 222. The temperature-sensitive spring 224 made of a memory alloy is biased in the direction opposite to the right direction in the figure, that is, in the direction in which the hot water side valve portion 210 is closed.

Here, the temperature-sensitive spring 224 has its left end in contact with a spring receiver 234 that forms part of the valve case 204 and its right end in contact with the hot water side valve portion 210, that is, the main valve 206.
On the other hand, the first bias spring 218 has the left end in the drawing in contact with the water side valve portion 208, that is, the main valve 206, and the second bias spring 220 arranged in series with the first bias spring 218 has a right end at the stopper described later. It is made to contact | abut to the below-mentioned advance / retreat member 223 via the ring 228.
In this hot water / water mixing valve, the water flowing in through the water inflow passage 200 and the hot water flowing in through the hot water inflow passage 202 flow to the left in the drawing and are mixed in the mixing chamber 222, and the mixed water is directed toward the water discharge portion. It flows out to the left.

Reference numeral 230 denotes a rotation operation shaft. By rotating the rotation operation shaft 230, the temperature control shaft 232 that protrudes rightward in the figure from the main valve 206 and holds the main valve moves in the horizontal direction in the figure. The position of the main valve 206, that is, the position of the water side valve portion 208 and the hot water side valve portion 210 is moved.
Here, the rotation operation shaft 230 has a cylindrical portion 226 inside the valve case 204.

  Reference numeral 223 denotes an advancing / retreating member having a cylindrical shape as an operating force transmission member, and a male screw formed on the outer peripheral surface thereof is screwed to a female screw formed on the inner peripheral surface of the cylindrical portion 226, and screw feed is performed by rotation of the operating shaft 230. In the figure, it moves forward and backward in the left-right direction.

  In this hot water / water mixing valve, the forward / backward member 223 moves forward and backward by rotating the rotary operation shaft 230, and the biasing force of the first bias spring 218 and the second bias spring 220 is moved by the stopper ring 228 that moves together at this time. Thus, the position of the main valve 206 in the left-right direction in the figure, specifically, the balance position of the biasing force of the first bias spring 218 and the second bias spring 220 and the temperature-sensitive spring 224 is shifted in the left-right direction. (Migration) That is, the temperature of the mixed water in the hot / cold water mixing valve is set to the desired temperature or the setting is changed.

  In this hot and cold water mixing valve, the main valve 206 moves to the left in the drawing to the full position and the water side valve portion 208 comes into contact with the water side valve seat 214, so that the water side valve portion 208 is fully closed and the hot water side valve portion 210. Is fully opened, and the hot water side valve portion 210 is brought into full contact with the hot water side valve seat 216 by moving in the opposite direction to the full position, so that the hot water side valve portion 210 is fully closed and the water side valve portion 208 is fully opened.

Further, the water-side valve portion 208 and the hot-water side valve portion 210 are opened at their intermediate positions, and the opening amounts thereof are changed to change the inflow amounts of water and hot water.
Specifically, when the rotary operation shaft 230 is rotated (forward rotation) when the hot water side valve portion 210 is fully closed and the water side valve portion 208 is fully open, the first bias spring 218 and the second bias spring 220 are operated. As a result, the main valve 206 is shifted leftward in the figure.
In the shifted state, the left biasing force by the first bias spring 218 and the second bias spring 220 and the right biasing force by the temperature sensitive spring 224 are balanced, and in this state, the water inflow passage 200 and the hot water When the temperature of the mixed water of the water and hot water flowing in from the inflow passage 202 fluctuates, the temperature-sensitive spring 224 increases or decreases the urging force and finely moves the main valve 206 in the left-right direction. Thereby, the mixed water temperature is maintained at the set temperature.

  On the other hand, when the rotation operation shaft 230 is rotated in the reverse direction, the urging forces of the first bias spring 218 and the second bias spring 220 are reduced, and thereby the main valve 206 is shifted rightward in the drawing. At the shift position, the mixed water temperature is automatically adjusted by increasing or decreasing the biasing force based on the temperature sensing of the temperature-sensitive spring 224.

  However, this hot and cold water mixing valve rotates the rotary operation shaft 230 and pushes the advance / retreat member 223 in the left direction in the drawing, thereby deflecting the first bias spring 218, the second bias spring 220, and the temperature sensitive spring 224 in the contraction direction. Since the adjusting shaft 232 is moved, the deformation resistance force of the first bias spring 218, the second bias spring 220, and the temperature sensitive spring 224 acts at that time, and the temperature adjustment operation becomes heavy. The problem was inherent.

JP 2001-4050 A

  The present invention is based on the above situation, and when performing an operation for setting or changing the temperature by moving the temperature adjustment shaft, the operation is lightly performed without receiving deformation resistance due to the bias spring and the temperature-sensitive spring. The purpose of the present invention is to provide a hot and cold water mixing valve capable of performing the above.

  Thus, according to the first aspect of the present invention, there is provided: (a) a main valve provided with a water side valve portion and a hot water side valve portion provided apart in the axial direction; and (b) the water side valve by axial movement. A temperature adjusting shaft for shifting the position of the water side valve portion and the hot water side valve portion in a direction to change the opening degree of the water side and hot water side valve portion in a reverse or large relationship, and (c) the water side valve portion A temperature-sensitive spring that exerts an urging force in the direction of increasing the opening of the hot water side valve portion and decreasing the opening of the hot water side valve portion, and increases the urging force in response to the temperature rise of the mixed water; (d) the temperature-sensitive spring A hot water mixing valve with an automatic temperature control function having a bias spring that exerts an urging force in the opposite direction to the main valve, or the water side valve portion and the hot water side valve portion of the main valve by the temperature adjusting shaft. A pilot valve for controlling the opening degree of the valve is held so as to be relatively movable in the axial direction along the temperature control axis, and the temperature-sensitive spring and the bias spring are connected to the main valve or the valve. Assembling and holding the temperature control shaft in a state in which urging forces are applied to the lot valves in opposite directions to each other, a temperature control spring, a bias spring, a main valve or a pilot valve, and a temperature control shaft are configured. It is characterized in that it can be moved as a whole.

  According to a second aspect of the present invention, in the first aspect of the present invention, the temperature adjustment shaft of the valve unit according to the first aspect is configured such that the position of the main valve is changed by changing the position of the balance between the biasing forces of the temperature-sensitive spring and the bias spring. A stopper for limiting the operation range of the automatic temperature control to the set range is provided.

  According to a third aspect of the present invention, in the second aspect, the stopper is directly connected to the main valve or the pilot valve without the bias spring when the temperature adjusting shaft moves in the direction of increasing the mixed water temperature. Alternatively, the main valve is forcibly moved in a direction in which the water side valve portion is forcibly fully closed and the hot water side valve portion is forcibly fully opened after the automatic temperature control operation of the main valve has been stopped indirectly. It has a hot water side stopper to be used.

  According to a fourth aspect of the present invention, the temperature sensitive spring according to any one of the second and third aspects, wherein the stopper is moved with respect to the main valve or the pilot valve when the temperature adjusting shaft moves in a direction to lower the mixed water temperature. The automatic temperature control operation of the main valve is stopped directly or indirectly without passing through the main valve in a direction in which the hot water side valve portion is forcibly fully closed and the water side valve portion is forcibly fully opened. It has the water side stopper which forcibly moves a valve, It is characterized by the above-mentioned.

  A fifth aspect of the present invention is characterized in that, in the third aspect, the water side valve portion is forcedly closed by pressing the water side valve portion against a corresponding water side valve seat.

  A sixth aspect of the present invention is characterized in that, in the fourth aspect, the hot water side valve seat is forcibly fully closed by pressing the hot water side valve portion against a corresponding hot water side valve seat.

  According to a seventh aspect of the present invention, in the fifth aspect, the operating force transmission path from the operating force input portion to the valve case via the hot water side stopper, the water side valve portion, and the water side valve seat of the temperature adjusting shaft. A buffer mechanism for absorbing an excessive operating force after forcibly pressing the water side valve portion against the water side valve seat is provided.

  According to an eighth aspect of the present invention, in the sixth aspect, the operating force transmission path from the operating force input portion to the valve case through the water side stopper, the hot water side valve portion, and the hot water side valve seat of the temperature adjusting shaft. Further, the present invention is characterized in that a buffer mechanism is provided for absorbing excessive operation force after the hot water side valve portion is forcedly pressed against the hot water side valve seat.

  According to a ninth aspect of the present invention, in any one of the seventh and eighth aspects, the buffer mechanism includes a buffer spring that is bent in the axial direction and absorbs an excessive operation force.

  According to a tenth aspect of the present invention, in the third aspect, the water side valve portion is a cylindrical valve portion, and the shaft extends from the fully open position to the fully closed reach position along the inner surface of the valve case, and further to a position exceeding the fully open reach position. An elastic seal member interposed between the outer surface of the water-side valve portion and the inner surface of the valve case after the fully closed reaching position and beyond the fully closed reaching position. The outer surface of the water-side valve portion and the inner surface of the valve case are sealed in a watertight manner in the radial direction so that the water-side valve portion is maintained in a fully closed state.

  According to an eleventh aspect of the present invention, in the fourth aspect, the hot water side valve portion is a cylindrical valve portion, and the shaft extends from the fully open position to the fully closed reach position and further to a position exceeding the fully closed reach position along the inner surface of the valve case. And an elastic seal member interposed between the outer surface of the hot water side valve portion and the inner surface of the valve case after the fully closed reaching position and beyond the fully closed reaching position. The hot water side valve portion and the valve case are sealed in a watertight manner in the radial direction so that the hot water side valve portion is maintained in a fully closed state.

Effects and effects of the invention

  As described above, the hot and cold water mixing valve of the present invention has a temperature control spring, a bias spring, a main valve or a pilot valve assembled into a temperature control shaft to form a valve unit. The entire valve unit can be moved while holding the bias spring. According to the present invention, when the temperature adjustment shaft is moved in the axial direction to set or change the temperature, the bias spring or the temperature Therefore, the temperature control shaft can be moved lightly, that is, temperature can be set or changed.

  In the present invention, a stopper is provided on the temperature adjustment axis of the valve unit to limit the operation range of automatic temperature control of the main valve, which is performed by moving according to the change in the balance position between the temperature-sensitive spring and the bias spring, to the set range. (Claim 2).

  In this case, when the temperature adjusting shaft moves in the direction to increase the temperature of the mixed water, the stopper directly or indirectly hits the main valve or pilot valve without using a bias spring, and performs automatic temperature adjustment of the main valve. It is possible to have a hot water side stopper for forcibly moving the main valve in a direction in which the water side valve portion is forcibly closed and the hot water side valve portion is forcibly fully opened after the operation is stopped. 3).

Here, the hot water side stopper stops the automatic temperature control operation of the main valve after the temperature of the mixed water reaches, for example, 50 ° C., and the water side valve portion is forcibly fully closed and the hot water side valve portion is forcibly fully opened. The position can be determined so that the main valve is forcibly moved.
In this case, the automatic temperature control action by the main valve is not performed on the high temperature side where the mixed water temperature exceeds 50 ° C.

For example, there is almost no need to automatically adjust the temperature of the mixed water to the set temperature on the high temperature side exceeding 50 ° C., and hot water only exceeding 50 ° C. is sufficient in most cases.
Therefore, in this case, for example, the automatic temperature control action by the main valve is not performed on the high temperature side exceeding the upper limit temperature such as 50 ° C.
By doing so, the temperature-sensitive spring and the bias spring do not repeatedly deform on the high temperature side exceeding the upper limit due to the automatic temperature adjustment operation of the main valve, and thereby the temperature-sensitive spring and the bias spring. The durability of can be improved.

  In the present invention, the stopper may directly or indirectly hit the main valve or pilot valve without a temperature-sensitive spring by moving the temperature adjusting shaft in the direction of decreasing the mixed water temperature. It is possible to have a water side stopper that forcibly moves the main valve in a direction in which the hot water side valve portion is forcibly fully closed and the water side valve portion is forcibly fully opened after the adjustment operation is stopped. (Claim 4).

For example, in the low temperature region lower than 30 ° C., there is almost no need to automatically adjust the temperature of the mixed water to the set temperature.
Therefore, in claim 4, the automatic temperature control action by the main valve is not performed in the low temperature region below the lower limit of the automatic temperature control range.

  According to the fourth aspect of the present invention, the main valve performs the automatic temperature adjustment operation at a temperature lower than the lower limit of the set temperature range, thereby eliminating the waste of the temperature-sensitive spring and the bias spring repeatedly expanding and contracting. It is possible to prevent a decrease in durability of the temperature-sensitive spring and the bias spring due to expansion and contraction.

  In Claim 3, the water side valve part can be forcedly closed by pressing the water side valve part against the corresponding water side valve seat (Claim 5).

  In claim 4, the hot water side valve seat can be forcedly closed by pressing the hot water side valve portion against the corresponding hot water side valve seat (claim 6).

  Next, according to a seventh aspect of the present invention, the water side valve portion is placed on the operating force transmission path from the operating force input portion to the valve case through the hot water side stopper and the water side valve portion of the temperature control shaft and the water side valve seat. A buffer mechanism that absorbs excessive operating force after forcibly pressing against the water-side valve seat is provided, and if this is done, the water-side valve section is moved to the water-side valve seat by the excessive operating force. It is possible to satisfactorily solve the problem of excessively pressing strongly, which leads to damage of the hot and cold mixing valve.

  Next, according to an eighth aspect of the present invention, on the transmission path of the operating force from the operating force input portion to the valve case through the water side stopper of the temperature control shaft, the hot water side valve portion, and the hot water side valve seat. A buffer mechanism for absorbing an excessive operating force after the side valve portion is forcedly pressed against the hot water valve seat is provided. Also in this claim 8, the mixed water temperature is lower than the lower limit of the set temperature. In this case, it is possible to avoid a problem that an excessive operating force is applied and the hot and cold mixing valve is damaged by the excessive operating force.

When these buffer mechanisms are provided, the buffer mechanism can have a buffer spring that bends in the axial direction and absorbs excessive operating force (claim 9).
In this way, an excessive operating force can be absorbed well and effectively.

  Next, according to a tenth aspect of the present invention, the water-side valve portion is a cylindrical valve portion according to the third aspect, and is movable in the axial direction along the inner surface of the valve case from a fully open position to a fully closed reach position and beyond. In addition, at the fully closed reach position and beyond this, water is sealed in a radial direction with an elastic seal member interposed between the outer surface of the water-side valve portion and the inner surface of the valve case. The side valve portion is maintained in a fully closed state, and according to claim 10, when excessive operation force is applied, the water side valve portion is further moved from the fully closed reaching position, The excessive operating force can be absorbed, and it is possible to omit providing a buffer mechanism for absorbing the excessive operating force.

  On the other hand, according to the eleventh aspect, the hot water side valve portion is a cylindrical valve portion, which can move in the axial direction along the inner surface of the valve case from the fully open position to the fully closed reach position and beyond the fully closed position. After reaching and exceeding this position, an elastic seal member interposed between the hot water side valve portion and the valve case is sealed in a watertight manner between them in a radial direction, and the hot water side valve portion is fully closed. According to the eleventh aspect of the present invention, the excessive operating force can be satisfactorily absorbed by the further movement of the hot water side valve portion after reaching the fully closed position.

  Further, according to the tenth and eleventh aspects, since the excessive operation is absorbed by the movement of the water side valve portion and the hot water side valve portion, there is an advantage that the operation is not particularly heavy at that time. .

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, 10 is a valve case, and a water inlet 12 and a hot water inlet 14 are formed through the valve case 10 in the radial direction.
In addition, a mixing chamber 16 is formed therein, and water and hot water flowing in from the water inlet 12 and the hot water inlet 14 are mixed in the mixing chamber 16, and the mixed water flows from the outflow portion 18 to the water discharge portion. And it has come to leak.

Reference numeral 20 denotes a main valve integrally having a water side valve portion 22 and a hot water side valve portion 24 corresponding to the water inlet 12 and the hot water inlet 14, and holds an O-ring 26 as an elastic seal member on the outer peripheral surface thereof. The main valve 20 is fitted to the inner surface (inner peripheral surface) of the valve case 10 on the outer surface (outer peripheral surface) through the O-ring 26 so as to be watertight and slidable in the axial direction (left and right direction in the figure). Yes.
The valve case 10 is formed with a water side valve seat 23 and a hot water side valve seat 25, respectively, and the water side valve portion 22 and the hot water side valve portion 24 abut against them, thereby blocking the inflow of water and hot water. Is done.

As shown in FIG. 2, the main valve 20 includes a cylindrical outer valve portion 28 having a water side valve portion 22 and a hot water side valve portion 24, and a central cylindrical portion 30 inside thereof. These are integrally connected by arms 32 extending radially from the central tube portion 30.
Here, the central cylindrical portion 30 is formed with an insertion hole 34 penetrating through the central cylindrical portion 30 in the axial direction.

Reference numeral 36 denotes a temperature adjusting shaft (temperature adjusting shaft) that adjusts the temperature by moving in the axial direction (temperature is set or changed), and is provided outside the small diameter portion 38, the medium diameter portion 40, the large diameter portion 42, and the small diameter portion 38. And a sleeve 46 with a flange 44 assembled in a fitted state.
Here, the axial position of the sleeve 46 is defined by a retaining ring 47 elastically fitted in the annular groove of the small diameter portion 38.
It is also possible to form this sleeve 46 integrally with the small diameter portion 38.
The main valve 20 is loosely fitted and assembled to the small diameter portion 38 so as to be relatively movable in the axial direction in the central insertion hole 34. That is, the main valve 20 is held by the temperature adjusting shaft 36 so as to be movable in the axial direction.

  Further, a temperature-sensitive spring 48 made of a shape memory alloy coil spring is fitted and assembled to the temperature adjusting shaft 36 on the left side, and a bias spring 50 made of a steel coil spring is fitted on the right side.

That is, the temperature sensing spring 48 is assembled to one side (left side) in the axial direction with the main valve 20 therebetween, and the bias spring 50 is assembled to the temperature control shaft 36 on the other side (right side) in the axial direction. The spring 48 and the bias spring 50 are held by the temperature adjusting shaft 36 together with the main valve 20.
The temperature adjusting shaft 36, the main valve 20, the temperature sensing spring 48, and the bias spring 50 constitute a valve unit 52 as one assembly, and the axial direction of the temperature adjusting shaft 36, that is, the horizontal direction in the figure. As a result of these movements, they can all be moved together.

  Here, one end (the left end in the figure) of the temperature-sensitive spring 48 is brought into contact with the flange 44 of the sleeve 46, and the other end (the right end in the figure) is brought into contact with the central cylinder portion 30 of the main valve 20, The biasing force is biased to the main valve 20 in the right direction in the drawing, that is, in the direction in which the water side valve portion 22 is opened and the hot water side valve portion 24 is closed.

On the other hand, one end (right end in the figure) of the bias spring 50 is brought into contact with the large-diameter portion 42 of the temperature adjusting shaft 36 and the other end (left end in the figure) is brought into contact with the central cylindrical portion 30 of the main valve 20. The temperature-sensitive spring 48 is biased to the left in the drawing in the direction opposite to the biasing direction.
As a result, the main valve 20 is normally held at a position where the biasing force of the temperature-sensitive spring 48 and the biasing force of the bias spring are balanced.

The temperature-sensitive spring 48 is arranged in the mixing chamber 16 as shown in FIG. 1, and increases the urging force in the right direction in the figure when the temperature of the mixed water in the mixing chamber 16 rises.
As a result, there is a difference between the rightward biasing force in the figure by the temperature-sensitive spring 48 and the leftward biasing force by the bias spring 50, and as a result, the main valve 20 has the biasing force of the temperature-sensitive spring 48 and the bias spring 50. The position is shifted (shifted) to the right in the drawing, that is, in the direction in which the water side valve portion 22 is opened and the hot water side valve portion 24 is closed to a position where the urging force is balanced.

Conversely, when the temperature of the mixed water decreases, the urging force of the temperature-sensitive spring 48 decreases. As a result, the main valve 20 moves to the left in the drawing to a position where the urging force of the temperature-sensitive spring 48 and the urging force of the bias spring 50 are balanced. That is, it shifts (shifts) in the direction of closing the water side valve portion 22 and in the direction of opening the hot water side valve portion 24.
The main valve 20 automatically finely moves in the left-right direction in the figure by the temperature-sensitive spring 48 that increases or decreases the urging force in response to the mixed water temperature, and the opening degree of the water-side valve portion 22 and the hot water-side valve portion 24 is increased. The temperature of the mixed water is automatically adjusted to the target temperature set according to the amount of movement of the temperature adjusting shaft 36.
The temperature-sensitive spring 48 and the bias spring 50 change the balance position of the urging force while keeping the total length constant, and finely move the main valve 20 to perform an automatic temperature adjustment operation.

The small-diameter portion 38 of the temperature adjusting shaft 36 is integrally provided with an eccentric shaft portion 54 at a position eccentric from the rotational axis, and the eccentric shaft portion 54 is formed in a corresponding position formed on the valve case 10 side. The hole 56 is fitted.
The eccentric shaft portion 54 and the positioning hole 56 form a rotation restricting portion of the temperature adjusting shaft 36.

As shown also in FIG. 2, the inner diameter portion 40 of the temperature adjusting shaft 36 and the sleeve 46 forming a part of the temperature adjusting shaft 36 are respectively provided with a hot water side stopper 60 and a water side protruding in a step in the radial direction. The stoppers 64 are provided opposite to each other at positions separated in the axial direction.
The hot water side stopper 60 and the water side stopper 64 limit the operation of automatic temperature control of the main valve 20 within a certain range, and the central cylinder portion 30 of the main valve 20 is covered with the hot water side stopper 60. The contact portion 58 and the contacted portion 62 that faces the water side stopper 64 are provided in opposite directions.

The main valve 20 is independent of the temperature adjusting shaft 36 between a position where the hot water side stopper 60 abuts against the abutted portion 58 and a position where the water side stopper 64 abuts against the abutted portion 62. Can move.
Specifically, in accordance with the change in the balance position between the urging force of the temperature sensing spring 48 and the urging force of the bias spring 50, it moves in the horizontal direction in the figure along the small diameter portion 38 of the temperature adjusting shaft 36, and the automatic temperature of the mixed water Adjustment operations can be performed.

  Reference numeral 66 denotes a rotation operation shaft, a large-diameter bottomed cylindrical portion 68 accommodated in the valve case 10, a fitting shaft portion 72 rotatably fitted in the fitting hole 70 of the valve case 10, and a valve A connecting shaft portion 74 that protrudes from the case 10 to the right in the drawing and is connected to the handle. In the serration portion 76 formed on the outer peripheral surface of the connecting shaft portion 74, an operating force not shown in the figure. It is connected to a handle as an input part of the input unit in an integrally rotated state.

Reference numeral 78 denotes a retaining ring that is elastically fitted in the annular groove of the rotation operation shaft 66. By this retaining ring 78 and the cylindrical portion 68, the axial position of the rotation operation shaft 66 (right and left positions in the figure). Is regulated.
The fitting shaft 72 and the fitting hole 70 are sealed watertight by an O-ring 80 as an elastic seal member.

A cylindrical transmission member 82 that transmits an operation force from the rotation operation shaft 66 to the temperature adjustment shaft 36 is inserted inside the cylindrical portion 68 of the rotation operation shaft 66.
A female screw 84 is formed on the inner peripheral surface of the transmission member 82, and the female screw 84 is screwed to a male screw 86 formed on the outer peripheral surface of the large-diameter portion 42 of the temperature control shaft 36.
The temperature adjusting shaft 36 is moved forward and backward in the left-right direction in the figure by screw feed by the rotation of the transmission member 82.

  The transmission member 82 is integrally provided with an engagement protrusion 88 that is radially outward, and the engagement protrusion 88 is slid in the engagement groove 90 on the inner peripheral surface of the cylindrical portion 68 in the axial direction. The transmission member 82 is movably fitted, and the transmission member 82 rotates integrally with the cylindrical portion 68 of the rotation operation shaft 66 by the engagement action of the engagement protrusion 88 and the engagement groove 90.

In the transmission member 82, stepped portions 92a and 92b are formed by a large-diameter portion at the front end portion and a large-diameter portion at the rear end portion, and a buffer spring 94 formed of a coil spring is interposed between the pair of washers. 96 is interposed.
Here, each of the washers 96 has an inner peripheral portion fitted into the stepped portions 92 a and 92 b of the transmission member 82, and the outer peripheral portion has steps of the stepped portion 98 a of the valve case 10 and the cylindrical portion 68. The fitting portion 98b is fitted in the axial contact state.

The buffer spring 94 exerts its urging force on the stepped portions 98a and 98b in opposite directions via the washer 96.
The buffer spring 94 normally does not bend in the axial direction when the rotational operation shaft 66 is rotated, and the transmission member 82 is fixed in the axial direction with respect to the cylindrical portion 68 so that the transmission member is transferred from the rotational operation shaft 66. The temperature adjusting shaft 36 is moved forward and backward by screw feed by the rotational force transmitted to 82.
In the present embodiment, the buffer mechanism 100 includes the buffer spring 94, the washer 96, the stepped portion 98a of the valve case 10, the stepped portion 98b of the cylindrical portion 68, and the stepped portions 92a and 92b of the transmission member 82. Yes.
Reference numeral 101 denotes a coil spring for absorbing backlash at a threaded portion between the temperature adjusting shaft 36 and the transmission member 82.

Next, the operation of the hot and cold water mixing valve of this embodiment will be described.
FIG. 1 shows a state in which the temperature of the mixed water is set to about 40 ° C., for example. At this time, the water side valve portion 22 and the hot water side valve portion 24 are respectively connected from the corresponding water side valve seat 23 and hot water side valve seat 25. In the open valve state, the water and hot water from the water inflow passage 12 and the hot water inflow passage 14 are both flowed into the mixing chamber 16.

  Under this condition, the main valve 20 is slightly moved in the left-right direction in the figure by a temperature-sensitive spring 48 that increases or decreases the biasing force in response to the temperature of the mixed water. The ratio is automatically adjusted, and the mixed water temperature is automatically adjusted to a set temperature (for example, 40 ° C.).

In this state, when the rotation operation shaft 66 is rotated in the forward direction by an operation force applied through a handle (not shown), the entire valve unit 52 including the temperature adjustment shaft 36 is moved in the left direction in the figure, and the water side valve portion 22 is opened. The main valve 20 is shifted (shifted) to the left in the figure in a direction to decrease the degree and increase the opening of the hot water side valve portion 24.
FIG. 3I shows the state at this time.

In the position after the shift, the main valve 20 finely moves in the left-right direction in the drawing by the temperature-sensitive spring 48 responding to the mixed water temperature to increase or decrease the urging force, and automatically adjust the mixed water temperature to the set temperature.
Note that the state shown in FIG. 3I represents the position when the mixed water temperature is set to 45 ° C. and the main valve 20 performs the automatic temperature control operation, for example.

In FIG. 3 (II), the rotation operation shaft 66 is further rotated in the forward direction to further move the entire valve unit 52 including the temperature adjusting shaft 36 and the main valve 20 to the left in the figure, and the temperature of the mixed water is set to 50, for example. It shows the state when set to ° C.
At this time, as shown in the figure, the hot water side stopper 60 provided on the temperature adjusting shaft 36 is in contact with the contacted portion 58 of the main valve 20, and the automatic temperature of the main valve 20 is here. The adjustment operation is stopped.
That is, in this state, even if the temperature sensing spring 48 increases the urging force due to the rise in the temperature of the mixed water and tries to extend, the movement of the main valve 20 in the right direction in the drawing is blocked by the hot water side stopper 60. The main valve 20 cannot perform an operation for automatically adjusting the temperature according to the temperature change of the mixed water.

When the rotary operation shaft 66 is further rotated in the forward direction from this state and the temperature adjusting shaft 36 is moved in the left direction in the figure, the stopper action is caused by the contact between the hot water side stopper 60 and the contacted portion 58 of the main valve 20. Thus, the main valve 20 is pushed directly (forced movement) without passing through the bias spring 50 in the direction in which the water side valve portion 22 is forcibly fully closed and the hot water side valve portion 24 is forcibly fully opened. As a result, the water side valve portion 22 is brought into a forced fully closed state, and the hot water side valve portion 24 is brought into a forced fully opened state.
That is, the main valve 20 is pushed directly to the position where the hot water side is fully opened by the temperature adjusting shaft 36 without passing through the bias spring 50. FIG. 3 (III) shows the state at this time.

If the rotation operation shaft 66 is further rotated in the forward direction from the state of FIG. 3 (III), the main valve 20 and the temperature adjusting shaft 36 may further move to the left from the position shown in FIG. 3 (III). In this case, the buffer spring 94 in the buffer mechanism 100 is bent in the contraction direction to absorb an excessive operation force.
More specifically, the transmission member 82 relatively moves backward by screw feed in the right direction in the drawing while bending the buffer spring 94 in the contraction direction, and excessive operation force is applied to the contraction deflection of the buffer spring 94 and the transmission member 82 in the drawing. Absorbed by a backward movement in the right direction.

Next, FIG. 4 shows the action when the rotation operation shaft 66 is rotated in the reverse direction to set the temperature of the mixed water to the low temperature side. FIG. This represents a state when the entire valve unit 52 is moved rightward from the position shown in FIG. 1 by rotating the direction and the temperature of the mixed water is set to about 35 ° C., for example.
In this state, the main valve 20 finely moves in the left-right direction according to the increase / decrease in the temperature of the mixed water, and performs an operation of automatically adjusting the temperature of the mixed water to a set temperature, for example, 35 ° C.

In FIG. 4 (II), the rotating operation shaft 66 is further rotated in the reverse direction from this state, the temperature adjusting shaft 36 is moved to the right in the drawing, and the temperature of the mixed water is set to, for example, 30 ° C. on the lower temperature side. It represents the state of time.
At this time, the water side stopper 64 of the temperature control shaft 36 is in contact with the contacted portion 62 of the main valve 20, and the automatic temperature adjustment operation of the main valve 20 is forcibly stopped. .
When the temperature adjustment shaft 36 is further moved to the right in the figure, the main valve 20 does not go through the temperature sensitive spring 48 due to the stopper action caused by the contact between the water side stopper 64 and the contacted portion 62 of the main valve 20. The hot water side valve portion 24 is forcibly pressed against the hot water side valve seat 25, where the hot water side valve portion 24 is forced fully closed, as shown in FIG. 4 (III). The part 22 is forcedly opened.
Under the state of FIG. 4 (III), the hot water inflow from the hot water inflow passage 14 disappears, and only water flows in from the water inflow passage 12 and is discharged from the water discharge portion.

  When the rotary operation shaft 66 is further rotated in the reverse direction from the state shown in FIG. 4 (III), the temperature adjusting shaft 36 at this time is brought into contact with the hot water side valve seat 24 and the main valve. 20 cannot move rightward in the drawing due to the contact of the water-side stopper 64 with the contacted portion 62 of the 20, so that the excessive operating force applied to the rotating operation shaft 66 causes the buffer spring 94 of the buffer mechanism 100 to contract. It is absorbed by bending.

  Specifically, as shown in FIG. 4 (III), while the buffer spring 94 is bent in the contraction direction, the transmission member 82 is advanced forward by screw feed in the left direction in the drawing opposite to FIG. 3 (III). By moving, it absorbs the excessive operating force.

  As described above, in this example, the operation of the automatic temperature control by the main valve 20 is performed within a temperature range of more than about 30 ° C. to less than 50 ° C. The main valve is operated on the high temperature side and the low temperature side exceeding this temperature range. 20 does not perform automatic temperature control, and the main valve 20 is pushed directly by the temperature adjusting shaft 36 without passing through the bias spring 50 and the temperature sensing spring 48 in the high temperature side and low temperature side regions. The valve is brought into an open or completely closed state and held in that state.

According to the present embodiment as described above, when the temperature adjustment shaft 36 is moved in the axial direction and the temperature is set or changed, the deformation resistance due to the bias spring 50 and the temperature sensitive spring 48 is not received, and thus lightly. A movement operation of the temperature adjusting shaft 36, that is, an operation for setting or changing the temperature can be performed.
In addition, when the water side valve portion 22 and the hot water side valve portion 24 are completely closed, the operation can be performed without being influenced by the bias spring 50 and the temperature sensitive spring 48, so that there is an advantage that the operation is light.

  Further, in the present embodiment, the temperature-sensitive spring 48 and the bias spring 50 are prevented from repeatedly deforming to expand or contract due to the automatic temperature control operation of the main valve 20 on the high temperature side and the low temperature side exceeding the upper limit and the lower limit. Therefore, the durability of the temperature-sensitive spring 48 and the bias spring 50 can be improved.

  Moreover, in this embodiment, excessive operating force after forcibly pressing the water side valve portion 22 or the hot water side valve portion 24 against the water side valve seat 23 or the hot water side valve seat 25 on the operating force transmission path is provided. Since the absorbing mechanism 100 for absorbing is provided, the water side valve portion 22 and the hot water side valve portion 24 are excessively pressed against the water side valve seat 23 and the hot water side valve seat 25 by an excessive operating force. However, it is possible to prevent problems that lead to damage to the hot and cold water mixing valve.

Next, FIG. 5 shows another embodiment of the present invention.
(A) in the same figure is an example when the arrangement | positioning position of the buffer mechanism 100 is provided in the position different from the above.
As shown, the buffer mechanism 100 is provided in the main valve 20 itself. Specifically, here, the central cylinder portion 30 of the main valve 20 is divided into an inner cylinder 30-1 and an outer cylinder 30-2, and a buffer mechanism 100 having the same configuration as described above is provided between them. .
Here, the outer cylinder 30-2 is provided with stepped portions 98a and 98b, and the inner cylinder 30-1 is provided with stepped portions 92a and 92b.
(B) represents the action of the buffer mechanism 100, and the specific contents thereof are basically the same as described above.
That is, after the water-side valve portion 22 of the main valve 20 comes into contact with the water-side valve seat 23 and is completely closed, when the rotation of the rotation operation shaft 66 is further positively applied, the buffer spring 94 is retracted. The inner cylinder 30-1 of the main valve 20 moves relative to the outer cylinder 30-2 in the left direction in the drawing while absorbing the excessive operating force.

  Further, after the hot water side valve portion 24 comes into contact with the hot water side valve seat 25, when a reverse rotation operation force is further applied to the rotation operation shaft 66, the inner cylinder 30 is bent while the buffer spring 94 is bent in the contraction direction. -1 moves relative to the outer cylinder 30-2 in the right direction in the figure to absorb excessive operating force.

  In the above embodiment, the water side valve seat 23 and the hot water side valve seat 25 are provided integrally with the valve case 10, but the water side valve seat 23 and the hot water side valve seat 25 are separated from the valve case 10. It is also possible to provide a buffer mechanism of the same or different form between the water side valve seat 23, the hot water side valve seat 25 and the valve case so as to absorb excessive operating force there. Is possible.

Next, FIG. 6 shows still another embodiment of the present invention.
In this example, a water side valve seat 102 and a hot water side valve seat 104 are provided on the radially inner surface of the valve case 10 at positions adjacent to the water inflow passage 12 and the hot water inflow passage 14, and an annular holding groove is provided there. The O-ring 106 is fitted in as an elastic seal member, and the water-side valve portion 22 and the hot water-side valve portion 24 of the main valve 20 are placed along the radially inner surface of the valve case 10 at the valve closing position and The water-side valve portion 22 can be moved to a position beyond this, and the outer surface in the radial direction of the water-side valve portion 22 is brought into elastic contact with the O-ring 106 of the water-side valve seat 102 in the radial direction at the closed position. The outer surface of the hot water side valve portion 24 is brought into elastic contact with the O-ring 106 of the hot water side valve seat 104 in the radial direction at the valve closing reach position. Seal between the hot water side valve section 24 and the hot water side valve seat 104 in a watertight manner Is that no to.

In this example, as shown in FIG. 6 (B), after both the water side valve portion 22 and the hot water side valve portion 24 reach the closed position, the valve closed state is further set in the left direction or the right direction in the drawing. It is possible to move while keeping it.
Then, the additional operating force is absorbed by the further movement from the valve closing arrival position.

  In this case, the O-ring 106 (or another type of seal member may be used) is held on the water side valve seat 102 and the hot water side valve seat 104 side. , A valve in which the O-ring 104 and other sealing members are respectively held on the hot water side valve portion 24 side, and the water side valve portion 22 and the hot water side valve portion 24 are formed in a flat shape via the O ring 104 and other sealing members. In some cases, sealing may be performed by elastically contacting the water side valve seat 102 and the hot water side valve seat 104 on the radially inner surface of the case 10 through the seal members in the radial direction.

Also in this embodiment, when an excessive operation force is applied, the excessive operation force can be absorbed by further movement of the water side valve portion 22 or the hot water side valve portion 24 from the fully closed position. It is possible to omit providing a buffer mechanism for absorbing a large operating force.
Moreover, since excessive operation is absorbed by the movement of the water side valve part 22 and the hot water side valve part 24, the advantage that operation does not become especially heavy in that case is acquired.

FIG. 7 shows still another embodiment of the present invention.
In this example, the hot and cold water mixing valve is configured as a pilot type valve.
In the figure, reference numeral 108 denotes a water-side valve portion comprising a diaphragm valve (which may be a piston valve) provided on the water inflow passage 12, and a rigid main body 110 and a rubber diaphragm membrane 112 held thereby. And have.
Here, each of the main body 110 and the diaphragm membrane 112 has a circular planar shape, and an outer peripheral end portion of the diaphragm membrane 112 is fixed to the valve case 10.

The water side valve portion 108 formed of the diaphragm membrane 112 abuts the water inflow passage 12 in the axial direction against the water side valve seat 114 projecting in a cylindrical shape in the right direction in the figure, and closes the valve. The valve is opened while being spaced apart in the axial direction and rightward in the figure, and the water inflow passage 12 is opened.
And the water side valve part 108 changes the inflow amount of the water which flows in into the mixing chamber 16 through the water inflow channel | path 12 according to the opening degree.

On the other hand, on the hot water inflow passage 14, a hot water side valve portion 116 composed of a cylindrical tubular valve portion is axially (horizontal direction in the figure) along the inner surface of the valve case 10, that is, a part of the hot water inflow passage 14. The valve case 10 is formed so as to be movable in a direction crossing the opening 14a that penetrates the valve case 10 in the radial direction.
The hot water side valve portion 116 contacts and closes the hot water side valve seat 118 by moving in the right direction in the figure to shut off the hot water inflow passage 14, and is separated from the hot water side valve seat 118 in the left direction in the figure. The hot water inflow passage 14 is opened by opening the valve.
And the hot water side valve part 116 changes the inflow amount of the hot water from the hot water inflow passage 14 according to the separation | spacing amount from the hot water side valve seat 118, ie, the opening degree.

The hot water side valve portion 116 holds an O-ring 120 as a seal member, and the O-ring 120 provides a watertight seal between the hot water side valve portion 116 and the inner surface of the valve case 10.
The hot water side valve portion 116 and the water side valve portion 108 are connected to each other by a connecting portion 122 having a cylindrical portion in the axial direction, and the water side valve portion 108, the hot water side valve portion 116 and the connecting portion 122. As a whole constitutes an integral main valve 124.
The hot water side valve part 116 and the connecting part 122 are coupled to each other by an arm 126 extending in the radial direction.

A back pressure chamber 128 is formed behind the right side of the water side valve portion 108.
The back pressure chamber 128 causes the internal pressure to act on the water side valve portion 108 as a pressing force in the valve closing direction.
The back pressure chamber 128 communicates with the water inflow passage 12 through an introduction small hole 130 formed through the water side valve portion 108, and water from the water inflow passage 12 passes through the introduction small hole 130 to back pressure. It flows into the chamber 128.
The back pressure chamber 128 increases the pressure when water in the water inflow passage 12 flows through the introduction small hole 130.
The water-side valve portion 108 is also provided with a pilot passage 132 as a drainage passage through which the water in the back pressure chamber 128 is drawn to the mixing chamber 16 side through the water-side valve portion 108 at the center thereof.

In the present embodiment, the valve unit 52 is provided with a pilot valve 134.
The pilot valve 134 controls the opening / closing operation of the main valve 124. When the pilot valve 134 moves to the right in the figure, the amount of water that flows from the back pressure chamber 128 to the mixing chamber 16 increases, and the back valve The pressure in the pressure chamber 128 decreases.
Then, the pressure of the water flowing in from the water inflow passage 12 becomes higher than the pressure in the back pressure chamber 128, and the increased pressure causes the water side valve portion 108, that is, the main valve 124 to move to the right in the figure. The opening degree of the side valve part 108 is large and the opening degree of the hot water side valve part 116 is small, so that the temperature of the mixed water is lowered.

  When the pilot valve 134 further moves rightward in the figure, the main valve 124 follows the pilot valve 134 and moves rightward in the figure so as to balance the pressure, and the opening of the water side valve portion 108 is increased. Further, the temperature of the mixed water is further lowered by further reducing the opening degree of the hot water side valve section 116.

On the other hand, when the pilot valve 134 moves to the left in the figure, the opening of the pilot valve 134 decreases, the amount of water that escapes from the back pressure chamber 128 decreases, the pressure in the back pressure chamber 128 increases, and the main pressure increases. The force that pushes the valve 124 to the left in the figure becomes stronger.
As a result, the main valve 124 moves leftward in the drawing, that is, in the same direction following the movement of the pilot valve 134 leftward in the drawing. Here, the opening degree of the water side valve part 108 is small and the opening degree of the hot water side valve part 116 is large, so that the temperature of the mixed water rises.
When the pilot valve 134 further moves to the left in the figure, the main valve 124 moves following this, further increasing the mixed water temperature.

A sleeve 136 is loosely fitted to the temperature adjusting shaft 36 of the valve unit 52 in an externally fitted state so as to be movable in the axial direction along the small diameter portion 38.
The pilot valve 134 is integrally formed on the right end side of the sleeve 136 in the drawing.
A temperature-sensitive spring 48 is inserted into the temperature adjusting shaft 36 with a sleeve 136 in between, and a bias spring 50 is inserted into the right-hand side in an externally fitted state. The temperature-sensitive spring 48 exerts a biasing force with respect to the sleeve 136 in the right direction in the drawing, that is, in the direction in which the pilot valve 134 is opened, that is, in the direction in which the water side valve portion 108 is opened.

The bias spring 50 exerts an urging force in the direction opposite to the temperature sensing spring 48 in the direction in which the pilot valve 134 is closed with respect to the sleeve 136, that is, in the direction in which the water side valve portion 108 is closed.
The sleeve 136 is held by the temperature adjustment shaft 36 at a position where the urging force of the temperature-sensitive spring 48 and the urging force of the bias spring 50 are balanced.

A radially outward engaging projection 144 is integrally provided on the large-diameter portion 42 of the temperature adjusting shaft 36, and the engaging projection 144 is an engagement groove 146 on the inner peripheral surface of the valve case 10. Are fitted to be slidable in the axial direction to restrict the rotation of the temperature adjusting shaft 36.
Also in this embodiment, the total length of the temperature sensitive spring 48 and the bias spring 50 is kept constant.

The temperature control shaft 36 is formed with an enlarged diameter portion 140 at the right end portion and the left end portion of the small diameter portion 38 in the drawing, and the hot water side stopper 60 and water are formed at the end portions of the enlarged diameter portion 140. A side stopper 64 is integrally formed.
The sleeve 136 is provided with corresponding contacted portions 58 and 62, respectively.
Reference numeral 138 denotes a large diameter portion corresponding to the flange 44 of FIG.

The sleeve 136 is further formed with a hooking portion 142 that hooks the connecting portion 122 on the left end side in the drawing and forcibly moves the main valve 124 rightward by moving the sleeve 136 rightward in the drawing.
The hook 142 works as follows. That is, after the water-side stopper 64 of the temperature adjusting shaft 36 comes into contact with the contacted portion 62 of the sleeve 136, when the temperature adjusting shaft 36 is further moved to the right in the figure, the hooking portion 142 hooks the connecting portion 122. To force them to move to the right. That is, the main valve 124 is forcibly moved in the right direction, the hot water side valve portion 116 is forcibly moved in the fully closed direction, and the water side valve portion 108 is forcibly moved in the fully open direction.

On the other hand, when the temperature adjusting shaft 36 moves to the left in the drawing, that is, when it moves in the direction of increasing the mixed water temperature, the hot water side stopper 60 comes into contact with the contacted portion 58 of the sleeve 136 in the middle, and thereafter Forcibly moves the sleeve 136 in the same direction as the leftward movement of the temperature control shaft 36, that is, in the direction of closing the water side valve portion 108 and opening the hot water side valve portion 116.
In other words, in this example, the hot water side stopper 60 and the water side stopper 64 forcibly move the pilot valve 134 through the sleeve 136 from a position when the temperature adjusting shaft 36 moves leftward and rightward in the drawing.

More specifically, the hot water side stopper 60 and the water side stopper 64 hit the pilot valve 134 indirectly via the contacted portion 58 or 62 at a certain position when the temperature adjusting shaft 36 moves in the left-right direction in the figure, and thereafter. Moves the pilot valve 134 directly without the temperature-sensitive spring 48 or the bias spring 50.
Reference numeral 150 denotes an annular seal member that seals the space between the small diameter portion 38 of the temperature control shaft 36 and the sleeve 136 in a watertight manner.

  In this embodiment, the pilot valve 134 has a mixed water temperature between a position where the hot water side stopper 60 abuts against the abutted portion 58 and a position where the water side stopper 64 abuts against the abutted portion 62. The temperature of the mixed water is adjusted by slightly moving the position in the left-right direction on the small diameter portion 38 of the temperature adjusting shaft 36 by the temperature-sensitive spring 48 that increases the urging force in response to the movement of the main valve 124. Let it adjust automatically.

  On the other hand, when the temperature adjustment shaft 36 is moved greatly in the left direction in the drawing, that is, in the direction of increasing the temperature of the mixed water, the hot water side stopper 60 comes into contact with the contacted portion 58 at a certain point. The pilot valve 134 is directly pushed by the hot water side stopper 60 without moving and moves in the left direction in the figure, and the water side valve portion 108 is forcibly pressed against the water side valve seat 114 to be fully closed. 116 is forcibly fully opened.

  On the contrary, when the temperature adjusting shaft 36 is largely moved in the right direction in the drawing, that is, in the direction of lowering the mixed water temperature, the water side stopper 64 comes into contact with the contacted portion 62 and the pilot valve is operated by the stopper action. The main valve 124 is pushed rightward in the figure by the pilot action of the pilot valve 134 by pushing the 134 without the temperature-sensitive spring 48.

When the temperature adjusting shaft 36 moves greatly to the left in the figure, the pilot valve 134 finally hits the water side valve portion 108 and forcibly presses it against the water side valve seat 114.
Further, when the temperature control shaft 36 is moved greatly to the right in the figure, the hooking portion 142 of the sleeve 136 finally hooks the main valve 124 to force the hot water side valve portion 116 against the hot water side valve seat 118. Become.
When an excessive operation force is applied to the rotary operation shaft 66 in such a state, the excessive operation force is absorbed by the buffer spring 94 of the buffer mechanism 100 being bent in the same manner as in the above embodiment.
Also in this embodiment, the same effect as that of the above embodiment can be obtained.

8 and 9 show still another embodiment of the present invention.
In this example, the main valve 20 is not only a water side valve but also a hot water side valve as a pilot type valve.
More specifically, not only the water side valve unit 108 but also the hot water side valve unit 154 is formed of a diaphragm valve.
The hot water side valve portion 154 composed of the diaphragm valve has a hard main body 110 having a circular planar shape and a diaphragm membrane 112, and an outer peripheral end portion of the diaphragm membrane 112 is fixed to the valve case 10. .

A back pressure chamber 156 is formed behind the hot water side valve portion 154 on the left side in the figure.
The back pressure chamber 156 causes the internal pressure to act as a pressing force in the valve closing direction with respect to the hot water side valve portion 154.
The hot water side valve portion 154 is provided with an introduction small hole 158 through which the hot water from the hot water inflow passage 14 flows into the back pressure chamber 156, and in the center of the back pressure chamber 156. A pilot passage 160 through which hot water is drawn out to the mixing chamber 16 side is provided through the hot water side valve portion 154.

This hot water side valve portion 154 moves forward and backward following the forward and backward movement of the hot water side pilot valve 174 described later in the left-right direction in the drawing, and changes the opening degree of the hot water inflow passage 14.
The hot water side valve portion 154 is closed by contact with the hot water side valve seat 162, and is opened by separating from the left side in the figure. Moreover, the inflow amount of hot water from the hot water inflow passage 14 is changed according to the valve opening amount.

In this embodiment, the temperature adjusting shaft 36 includes a central shaft body 164 having a circular outer cross section with a uniform outer diameter, a large-diameter sleeve 166-1 on the right side of the figure fitted on the center shaft body 164, and a relative position on the left side of the figure. And a sleeve 166-2 having a small diameter.
Here, the position of the right end of the large diameter sleeve 166-1 is defined by a retaining ring 166 in the drawing, and the position of the left end of the left sleeve 166-2 is defined by a retaining ring 168 in the drawing.

Also in this embodiment, the sleeve 136 in FIG. 7 is divided into the right sleeve 136-1 and the left sleeve 136-2 in which the sleeve 136 is divided in the axial direction, and the sleeve 136 having a short axial length that is externally fitted to the sleeve 136-2. -3.
Here, the sleeve 136-3 is defined by a retaining ring 170 at the right end position in the drawing.

  A water side pilot valve 172 is integrally formed on the sleeve 136-1, and a bias spring 50 is interposed between the sleeve 136-1 and the large-diameter sleeve 166-1 on the temperature control shaft 136. The biasing force of the bias spring 50 is directed leftward in the figure, that is, with respect to the sleeve 136-1, more specifically with respect to the water side pilot valve 172 and a hot water side pilot valve 174 described later, that is, the opening degree of the water side valve portion 108 It is small and extends in the direction of increasing the opening degree of the hot water side valve portion 154.

  On the other hand, a temperature-sensitive spring 48 is inserted between the sleeves 166-2 and 136-3, and the water-side pilot is further inserted into the sleeve 136-3 via the sleeve 136-3 and the sleeve 136-2. The urging force is exerted on the valve 172 and a hot water side pilot valve 174 described later in the right direction in the drawing, that is, in the direction opposite to the urging direction by the bias spring 50.

A hot water side pilot valve 174 is integrally formed at the left end of the sleeve 136-2 in the drawing, and the hot water side pilot valve 174 moves forward and backward in the left-right direction in the drawing integrally with the movement of the sleeve 136-2. ing.
The hot water side pilot valve 174 changes the opening degree of the pilot passage 160 penetrating the hot water side valve portion 154 and moves the hot water side valve portion 154 in the left-right direction following the hot water side pilot valve 174.
An annular seal member 176 is attached to the outer peripheral surfaces of the hot water side pilot valve 174 and the water side pilot valve 172.

Further, as shown in the partially enlarged view of FIG. 8, a clearance 178 is generated between the central shaft body 164 of the temperature control shaft 36 and each sleeve fitted on the center shaft body 164.
Also in this embodiment, the hot water side stopper 60 is provided on the sleeve 166-1 on the right side in the drawing of the temperature control shaft 36, and the water side stopper 64 is provided on the sleeve 166-2 on the left side in the drawing.
Also, the sleeve 136-1 is provided with a contacted portion 58 corresponding to the hot water side stopper 60, and the sleeve 136-3 is provided with a contacted portion 62 corresponding to the water side stopper 64.

Next, the operation of this embodiment will be described.
FIG. 8 shows a state in which both the water side valve portion 108 and the hot water side valve portion 154 are opened. Therefore, at this time, the water side pilot valve 172 and the hot water side pilot valve 174 are respectively connected to the water side pilot passage 132. The pilot passages 160 on the hot water side are opened.

In this state, when the temperature adjustment shaft 36 (that is, the valve unit 52) moves to the left in the drawing, the water side pilot valve 172 and the hot water side pilot valve 174 move to the left in the drawing together with the temperature adjustment shaft 36. The water side valve part 108 and the hot water side valve part 154 whose opening degree is controlled by the water side pilot valve 172 and the hot water side pilot valve 174 respectively move to the left, and the opening degree of the water side valve part 108 is increased. Small, the opening degree of the hot water side valve portion 154 becomes large, and the temperature of the mixed water is changed to the high temperature side.
In this state, when water and hot water flow into the mixing chamber, the temperature sensing spring 48 senses the temperature of the mixed water and increases or decreases the biasing force, so that the water side pilot valve 172 and the hot water side pilot valve 174 are moved in the horizontal direction in the figure. The water side valve portion 108 and the hot water side valve portion 154 are finely moved in the left-right direction in the figure following them. That is, the main valve 20 is finely moved to change the opening degree of the water side valve portion 108 and the hot water side valve portion 154. As a result, the temperature of the mixed water is automatically adjusted to the set temperature.

  When the temperature adjustment shaft 36 (that is, the valve unit 52) is moved to the right in the figure to move both the water side pilot valve 172 and the hot water side pilot valve 174 to the right, and the set temperature is changed to the low temperature side, At the position, the main valve 20 is finely moved in the horizontal direction in the figure by the biasing force of the temperature-sensitive spring 48 and the biasing force of the bias spring 50, and the temperature of the mixed water is automatically adjusted to the temperature after the setting change.

In this embodiment, the actions of the hot water side stopper 60 and the water side stopper 64 are basically the same as in the above embodiment.
Specifically, when the temperature adjustment shaft 36 is moved largely in the left direction in the drawing, the hot water side stopper 60 comes into contact with the contacted portion 58 without passing through the bias spring 50 at a certain position, and automatic temperature adjustment in the main valve 20 is performed. After the operation is stopped, the water side pilot valve 172 and the hot water side pilot valve 174 are pushed leftward in the figure to forcibly close the water side valve portion 108 and forcibly open the hot water side valve portion 154.

Conversely, when the temperature adjustment shaft 36 is moved greatly in the right direction in the figure, the water side stopper 64 comes into contact with the contacted portion 62 at a certain position, and the water side pilot valve 172 and the hot water side pilot valve 174 are temperature sensitive. Pushing it directly to the right without passing through the spring 48 stops the operation of automatic temperature control in the main valve 20 and then forcibly closes the hot water side valve portion 154 and forcibly opens the water side valve portion 108.
Therefore, in this embodiment, the same effects as described above can be obtained.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the present invention, a plurality of operating force transmission members can be provided and a buffer mechanism can be provided between any adjacent transmission members, and the buffer mechanism can absorb excessive operating force. The invention can be configured in various forms without departing from the spirit of the invention.

It is sectional drawing of the hot and cold water mixing valve which is one embodiment of the present invention. It is the figure which showed the valve unit in the hot and cold water mixing valve of the embodiment. It is operation | movement explanatory drawing of the hot water mixing valve of the embodiment. FIG. 4 is an operation explanatory diagram following FIG. 3. It is a figure of other embodiment of this invention. It is a figure of other embodiment of this invention. It is a figure of other embodiment of this invention. It is a figure of other embodiment of this invention. It is the perspective view which decomposed | disassembled and showed the principal part of embodiment of FIG. It is a figure of the conventional hot water mixing valve.

Explanation of symbols

10, 124 Valve case 20 Main valve 22, 108 Water side valve part 23, 102, 114 Water side valve seat 24, 116, 115 Hot water side valve part 25, 104, 118, 162 Hot water side valve seat 26, 106, 120 O Ring 36 Temperature control shaft 48 Temperature sensitive spring 50 Bias spring 52 Valve unit 60 Hot water side stopper 64 Water side stopper 94 Buffer spring 100 Buffer mechanism 134 Pilot valve

Claims (11)

(a) a main valve provided with a water side valve portion and a hot water side valve portion provided separately in the axial direction; and (b) opening degrees of the water side valve portion and the hot water side valve portion by axial movement. A temperature control shaft that shifts the position of the water side valve portion and the hot water side valve portion in a direction that changes largely or slightly in the opposite relationship, and (c) the opening degree of the water side valve portion is large, the hot water side valve portion A temperature-sensitive spring that exerts an urging force in the direction of decreasing the opening degree of the water and increases the urging force in response to a rise in the temperature of the mixed water, and (d) a bias that exerts an urging force opposite to the temperature-sensitive spring. A hot water mixing valve with an automatic temperature control function having a spring, and the temperature control shaft controls the main valve or a pilot valve for controlling an opening degree of the water side valve portion and the hot water side valve portion in the main valve. The temperature sensitive spring and the bias spring are held in opposite directions with respect to the main valve or the pilot valve. The temperature control shaft is assembled and held in a state of exerting an urging force on it, and a valve unit is configured including these temperature-sensitive spring, bias spring, main valve or pilot valve and temperature control shaft, and the whole can be moved integrally. A hot and cold water mixing valve characterized by what has been done.   The operation range of the automatic temperature adjustment of the main valve according to claim 1, wherein the temperature adjustment axis of the valve unit is moved according to a change in a balance position of a biasing force of the temperature-sensitive spring and the bias spring. A hot and cold water mixing valve provided with a stopper for limiting the setting range.   3. The main stopper according to claim 2, wherein the stopper directly or indirectly contacts the main valve or the pilot valve without the bias spring when the temperature adjusting shaft moves in the direction of increasing the mixed water temperature. A hot water side stopper for forcibly moving the main valve in a direction in which the water side valve portion is forcibly fully closed and the hot water side valve portion is forcibly fully opened after the automatic temperature control operation of the valve is stopped. A hot and cold water mixing valve.   4. The method according to claim 2, wherein the stopper is directly or indirectly connected to the main valve or the pilot valve without the temperature-sensitive spring when the temperature adjusting shaft moves in a direction to lower the mixed water temperature. The water side that forcibly moves the main valve in the direction to forcibly fully close the hot water side valve portion and forcibly fully open the water side valve portion after stopping the operation of the automatic temperature control of the main valve A hot and cold water mixing valve characterized by having a stopper.   4. The hot and cold water mixing valve according to claim 3, wherein the water side valve portion is forcibly fully closed by pressing the water side valve portion against a corresponding water side valve seat.   The hot and cold water mixing valve according to claim 4, wherein the hot water side valve seat is forcibly fully closed by pressing the hot water side valve portion against a corresponding hot water side valve seat.   6. The water-side valve according to claim 5, wherein the water-side valve is disposed on an operating force transmission path from the operating force input portion to the valve case through the hot water side stopper, the water side valve portion, and the water side valve seat of the temperature adjusting shaft. A hot and cold water mixing valve, characterized in that a buffer mechanism is provided for absorbing excessive operating force after the portion is forcedly pressed against the water side valve seat.   The hot water side valve according to claim 6, wherein the hot water side valve is disposed on the operating force transmission path from the operating force input portion to the valve case through the water side stopper, the hot water side valve portion, and the hot water side valve seat of the temperature adjusting shaft. A hot and cold water mixing valve, characterized in that a buffer mechanism for absorbing an excessive operating force after the portion is forcedly pressed against the hot water side valve seat is provided.   9. The hot and cold water mixing valve according to claim 7, wherein the buffer mechanism has a buffer spring that is bent in the axial direction and absorbs an excessive operation force. 10.   In claim 3, the water-side valve portion is a cylindrical valve portion, and is movable in the axial direction along the inner surface of the valve case from a fully open position to a fully closed reach position and further to a position exceeding the fully open reach position. The outer surface of the water-side valve portion is formed by an elastic seal member interposed between the outer surface of the water-side valve portion and the inner surface of the valve case at and after the fully-closed reaching position. A hot and cold water mixing valve characterized in that the water-side valve portion is maintained in a fully closed state by sealing the inner surface of the valve case and the inner surface of the valve case in a watertight manner.   5. The hot water side valve portion according to claim 4, wherein the hot water side valve portion is a cylindrical valve portion and is movable in the axial direction along the inner surface of the valve case from a fully open position to a fully closed reach position and further to a position exceeding the fully closed reach position. The hot water side valve portion and the valve are formed by an elastic seal member interposed between the outer surface of the hot water side valve portion and the inner surface of the valve case after the fully closed reaching position and after the fully closed reaching position. A hot and cold water mixing valve characterized in that a space between the case and the case is sealed in a watertight manner so that the hot water side valve portion is maintained in a fully closed state.

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