JP3395660B2 - Hot water mixing valve - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing valve, and more particularly to a thermostat type hot and cold water mixing valve in which a valve element is biased from both sides by a bias spring and a temperature sensitive spring made of a shape memory material.

[0002]

2. Description of the Related Art As a thermostatic hot water mixing valve,
It is known to use a temperature sensitive spring made of a shape memory material such as a shape memory alloy. As described in JP-A-6-147333, in this type of hot and cold water mixing valve, a water seat and a hot water seat are provided in a cylindrical valve body, and the valve body moves forward and backward in the axial direction. And a bias spring for biasing the valve body in the approach direction of the water sheet, and a biasable spring for biasing the valve body in the approach direction of the water sheet. , A temperature control handle for advancing and retracting the bias spring is installed.

By rotating the temperature control handle, the bias spring advances and retreats in the axial direction, the biasing force of the valve body by the bias spring is changed, and the set water discharge temperature is changed.

That is, when the bias spring is retracted,
Since the biasing force of the bias spring decreases, the valve body approaches the hot water seat and separates from the hot water seat, and the set temperature drops. When the bias spring is moved forward, conversely, the biasing force of the bias spring increases, the valve body separates from the hot water seat and approaches the water seat, and the set temperature rises. When the mixed water temperature deviates from the set temperature due to fluctuations in the hot water supply temperature or hot water supply pressure while the mixed water at the set temperature is being discharged, the temperature-sensitive spring expands or contracts, and the valve element shifts to cause the mixed water. The temperature automatically returns to the set temperature.

[0005]

In the conventional hot and cold water mixing valve, the relationship between the rotation angle of the temperature control handle and the shift amount of the valve body is substantially linear as shown by the broken line in FIG.
That is, for example, in any of the low temperature range of 30 ° C. or lower, the medium temperature range of 30 to 50 ° C., and the high temperature range of 50 ° C. or higher, the shift amount of the valve body when the temperature control handle is turned by a unit angle is almost equal. Is equivalent. Therefore, in the low temperature range to the high temperature range, the rotation angle of the temperature control handle and the discharged mixed water temperature also have a substantially linear relationship.

Generally, in a faucet having a hot and cold water mixing valve, as shown in FIG.
30 ℃ ~ so that the temperature of the mixed water can be finely adjusted between 45 ℃
A wide scale range between 50 ° C is desired. For this purpose, the gradient of the relational line between the temperature of the temperature control handle and the water discharge temperature in the medium temperature range of 30 to 50 ° C.
It is necessary to assume that the straight line gradient) is asleep. However, if this gradient is simply neglected, in order to adjust the temperature from the low temperature range to the high temperature range, the rotation range of the temperature handle has to be set to a considerably large range. For a rotary type temperature control handle, the handle rotation range (C
~ H: C discharges only water from the water supply pipe. H discharges only hot water from the hot water supply pipe. ) Is within 360 ° (usually 27
Since it is necessary to set it within 0 °), it is not actually possible to simply lay down the gradient as described above. (The range of C to H exceeds 360 °.) Therefore, in the conventional example, as shown in FIG. 5B, the graduation range of the medium temperature water discharge area between 30 ° C and 50 ° C is narrow. Was becoming.

The present invention was made in view of such technical problems. The above gradient is small in the middle temperature range, and the above gradient is large in the low temperature and high temperature ranges. An object is to provide a hot and cold water mixing valve having a wide range.

[0008]

The hot and cold water mixing valve of the present invention according to claim 1 is provided with a water seat and a hot water seat in a tubular valve body, and is movable back and forth in the axial direction of the valve body. A valve body that can be brought into contact with and separated from the water seat and the hot water seat is arranged coaxially with the valve body, and a temperature sensitive spring for urging the valve body in the hot water seat approaching direction and the valve body In a hot and cold water mixing valve provided with a bias spring for urging in the approaching direction and a discharge water temperature setting member for advancing and retracting the bias spring in the axial direction of the valve body, when the valve body is located in the medium temperature discharge range, An urging force switching means for changing the urging force of the bias spring when the valve body is located in the low temperature discharge region or the high temperature discharge region is provided.

In such a hot and cold water mixing valve of the present invention, the bias of the bias spring is switched, so that the temperature gradient in the middle temperature range becomes small.

According to one aspect (claim 2) of the present invention, a plurality of bias springs are provided as the bias springs, and the switching means is partially provided when the valve element is located in the low temperature discharge region or the high temperature discharge region. The biasing force of the bias spring is applied to the valve body, and when the valve body is located in the medium temperature discharge region, the biasing forces of all the bias springs are applied to the valve body in series.

In such a hot and cold water mixing valve, when the discharge water set temperature is in the low temperature range or the high temperature range, only the biasing force of a part of the bias springs acts on the valve element, and the bias temperature in the middle temperature range. When set, the biasing force of the series connection body of the first and second bias springs acts on the valve body.

As is well known, when springs are connected in series, the combined spring constant becomes the harmonic mean of the spring constants of the springs,
It is smaller than the spring constant of each spring. Therefore, according to the hot and cold water mixing valve of the present invention according to claim 2, the biasing force of the valve body by the bias spring becomes small in the middle temperature range, and the gradient of the shift amount of the valve body (and hence the discharge temperature) with respect to the rotation angle of the temperature control handle. Is small and it is easy to finely adjust the temperature of the mixed water.

In the low temperature range or the high temperature range, the biasing force of the bias spring is stronger than in the middle temperature range, and this gradient becomes large. Therefore, the mixed water discharge temperature in the middle temperature range can be set wide without increasing the rotation range of the temperature control handle.

In an aspect (claim 3) of the hot and cold water mixing valve according to the invention of claim 2, the valve body is supported by a main shaft arranged coaxially with the valve body, and the valve body of the valve body is supported. The discharge water temperature setting member is capable of advancing and retracting in the axial direction, has a female screw on the inner peripheral surface, has a rotating shaft arranged coaxially with the main shaft, and a male screw meshing with the female screw. A cylindrical advancing / retreating shaft arranged coaxially with the main shaft, and a far end side flange part and a near end side flange which are respectively provided at an end part and a near end part far from the valve body of the advancing / retreat shaft. Part, a hook that is movably fitted to the advancing / retreating shaft in the axial direction, and that is restricted from moving in the valve body approaching direction by engaging with the proximal end part; It is fitted so as to be movable in the axial direction with respect to, is arranged between the hook and the valve body, and is provided in the middle of the longitudinal direction of the main shaft. A slide ring capable of abutting the hook-shaped locking portion with respect to the hook, and a first bias spring is interposed between the slide ring and the valve body in a force-accumulating state. The second bias spring is interposed between the and the far end side flange portion in a force-accumulating state.

According to a fourth aspect of the present invention, the switching means is provided in the main shaft protruding from the valve body, a flange-shaped locking portion provided at a tip of the main shaft, and in the middle of the main shaft. The collar-shaped engaging portion, the stopper ring urged by the second bias spring in a direction to be pressed to the far end side flange portion of the forward / backward shaft, and the stopper ring in a direction to be pressed to the hook by the first bias spring. When the valve body is located in the middle temperature discharge range, the flange-shaped engaging portion and the stopper ring are separated from each other, and the stopper ring is moved forward and backward by the second bias spring. Is pressed against the far end side flange portion, and the flange-shaped locking portion and the slide ring are separated from each other, the slide ring is pressed against the hook by the first bias spring, and the valve body is in the low temperature discharge region. When it is positioned, the flange-shaped locking portion engages with the stopper ring, and the hook is prevented from moving in the valve body approaching direction due to the engagement between the hook and the near end side flange portion. The biasing force of the bias spring 2 is applied to the valve body through the stopper ring and the main shaft in the same direction as the biasing force of the temperature-sensitive spring, and
The collar-shaped locking portion may be engaged with the slide ring so that the biasing force of the first bias spring does not act on the valve element and the forward / backward shaft.

In another aspect (claim 5) of the hot and cold water mixing valve according to the invention of claim 2, the discharge water temperature setting member has an internal thread on its inner peripheral surface, and is coaxial with the valve body. A cylindrical forward / backward shaft having a rotating shaft arranged therein and a male screw meshing with the female screw and arranged coaxially with the rotating shaft, and movable in the axial direction with respect to the valve body. A clutch column whose movement in the valve body approaching direction is restricted by contacting the valve body, and a first bias spring is interposed between the clutch column and the valve body in a force accumulation state. The second bias spring is interposed between the clutch column and the advancing / retreating shaft in a force-accumulating state.

In this case, the clutch column is engaged with the advancing / retreating shaft to restrict movement in the axial direction, or is engaged with the valve element to restrict movement in the axial direction. It is preferably configured to.

A hot and cold water mixing valve according to still another aspect (claim 12) of the present invention is provided with a plurality of bias springs as bias springs, and the switching means positions the valve element in the medium temperature discharge range. When doing, apply the series biasing force of each bias spring to the valve element in the direction opposite to the biasing force of the temperature sensitive spring,
When the valve body is located in the low temperature discharge region, the biasing force of a part of the bias spring acts on the valve body in the same direction as the biasing force of the temperature sensitive spring.

In this hot and cold water mixing valve, when the set discharge temperature of the mixed water is medium, each bias spring urges the valve element in series in the direction opposite to the temperature sensitive spring, so the urging force of this series bias spring is weak. Therefore, the gradient of the shift amount of the valve body (hence the water discharge temperature) with respect to the rotation angle of the temperature control handle becomes smaller.

When the discharge set temperature of the mixed water is low, some bias springs bias the valve element in the same direction as the temperature sensitive spring. Also in this case, the gradient of the shift amount of the valve body (and hence the discharge water temperature) with respect to the rotation angle of the temperature control handle becomes large.

[0021] In one mode (claim 13) of the hot and cold water mixing valve according to claim 12, the discharge water temperature setting member has a female screw on an inner peripheral surface, and is arranged rotatably around its axis. A rotating shaft, a cylindrical advancing / retreating shaft that has a male screw meshing with the female screw and is arranged coaxially with the rotating shaft, and a clutch column that is movable in the axial direction of the advancing / retreating shaft. Tena,
A first bias spring is arranged between the clutch column and the valve body, and a second bias spring is arranged between the clutch column and the advancing / retreating shaft.

According to a fourteenth aspect of the present invention, the bias spring switching means includes a protruding shaft projecting from the valve body toward the advancing / retreating shaft, a locking portion provided at a tip of the protruding shaft, and the first shaft. And a washer biased in a direction of being pressed against the advancing / retreating shaft by a bias spring of No. 2, and when the valve body is located in the high temperature discharge region and the medium temperature discharge region, the locking portion and the washer are separated from each other. , The washer is pressed against the advancing / retreating shaft by the second bias spring, the locking portion engages with the washer when the valve body is located in the low temperature discharge region, and the engaging portion causes the clutch column to move. It is preferable that the movement in the valve body approaching direction is regulated, so that the biasing force of the second bias spring is applied to the valve body in the same direction as the biasing force of the temperature sensitive spring via the washer and the protruding shaft. In this case, claim 15
As described above, it is preferable that when the valve body is located in the high temperature discharge region, the clutch column contacts the valve body or the advancing / retreating shaft, and the movement of the clutch column in the axial direction is restricted.

According to a sixteenth aspect of the present invention, the switching means includes a protruding shaft projecting from the valve body toward the advancing / retreating shaft, and a first locking portion provided at a tip of the protruding shaft. A second locking portion provided in the middle of the protruding shaft, a first washer biased in a direction to be pressed against the advancing and retracting shaft by the second bias spring, and a clutch by the first bias spring. A second washer biased in a direction to be pressed against the column, and when the valve body is located in the medium temperature discharge region, the first locking portion and the first washer are separated from each other, and The first washer is pressed against the advancing / retreating shaft by the second bias spring, and the second locking portion and the second washer are separated from each other,
The second washer is pressed against the clutch column by the first bias spring, and when the valve body is located in the low temperature discharge region, the first locking portion engages with the first washer, and The engagement portion restricts the movement of the clutch column in the valve body approaching direction, whereby the biasing force of the second bias spring is equal to the biasing force of the temperature-sensitive spring with respect to the valve body via the washer and the protruding shaft. In addition to being applied in the direction, the second lock portion may be engaged with the second washer so that the biasing force of the first bias spring does not act on the valve element and the advancing / retreating shaft. .

Further, as described in claim 17, the switching means includes a protruding shaft projecting from the advancing / retreating shaft toward the valve body, a locking portion provided at a tip of the protruding shaft, and the first shaft. And a washer biased in a direction to be pressed against the valve body by the bias spring, and when the valve body is located in the high temperature discharge region and the medium temperature discharge region, the locking portion and the washer are separated from each other,
The washer is pressed against the valve body by the first bias spring, the locking portion engages with the washer when the valve body is located in the low temperature discharge region, and the engagement portion engages the valve of the clutch column. The movement in the direction away from the body is restricted so that the biasing force of the first bias spring is applied to the valve body in the same direction as the biasing force of the temperature-sensitive spring via the washer, the salient shaft and the clutch column. It may be configured.
In this case, as described in claim 18, it is preferable that when the valve body is located in the high temperature discharge region, the clutch column contacts the valve body or the advancing / retreating shaft to restrict movement of the clutch column in the axial direction.

According to a nineteenth aspect of the present invention, the switching means includes a projecting shaft projecting from the advancing / retreating shaft toward the valve body, a first locking portion provided at a tip of the projecting shaft, and the projecting shaft. A second locking portion provided in the middle of the shaft, and a first washer biased in a direction to be pressed against the valve body by the first bias spring,
A second washer biased in a direction to be pressed against the clutch column by the second bias spring, and when the valve body is located in the medium temperature discharge range, the first locking portion and the first lock portion are provided. The washer separates, the first washer is pressed against the valve body by the first bias spring, and the second locking portion separates from the second washer, and the second washer It is pressed against the clutch column by the bias spring 2 and when the valve body is located in the low temperature discharge region, the locking portion engages with the washer, and the engagement portion separates the clutch column from the valve body. The movement of the first bias spring is restricted in this direction, and the urging force of the first bias spring is applied to the valve body in the same direction as the urging force of the temperature-sensitive spring via the washer, the salient shaft and the clutch column. The second locking part engages with the washer The urging force of the second biasing spring may be made so as not to act on the valve body and the reciprocating shaft.

In a hot-water mixing valve according to another aspect of the present invention (claim 20), a plurality of bias springs are provided as bias springs, and the switching means for switching the biasing force of the bias springs acting on the valve body is provided. , When the valve body is located in the high temperature discharge area, the biasing force of all the bias springs in parallel is applied to the valve body in the direction opposite to the biasing force of the temperature sensitive spring, and when the valve body is located in the medium temperature discharge area, Apply the biasing force of some bias springs to the valve element in the direction opposite to the biasing force of the warm spring,
When the valve body is located in the low temperature discharge area, the valve body is directly advanced and retracted by the discharge water temperature setting member.

In the hot and cold water mixing valve according to claim 19, when the discharge set temperature of the mixed water is high, the parallel biasing forces of the plurality of bias springs press the valve body in the direction opposite to the biasing force of the temperature sensitive spring. The gradient of the shift amount of the valve body (and hence the discharge water temperature) with respect to the rotation angle of the temperature control handle becomes large.

When the set discharge temperature of the mixed water is medium, only a part of the bias springs presses the valve element in the direction opposite to the biasing force of the temperature sensitive spring, so that the valve with respect to the rotation angle of the temperature control handle. Amount of body shift (hence spout temperature)
Has a small gradient.

When the discharge set temperature of the mixed water is low, the valve body advances and retreats integrally with the discharge water temperature setting member such as the advancing / retreating shaft. Therefore, the shift amount of the valve body with respect to the rotation angle of the temperature control handle (thus, the discharge water temperature) ) Will have a large gradient.

According to the hot and cold water mixing valve of claim 20,
The valve body is supported by a main shaft arranged coaxially with the valve body, the main shaft is movable in the axial direction of the valve body, and the discharge water temperature setting member has an inner circumference. A cylindrical advancing / retreating shaft that has a female screw on its surface and is rotatably arranged around its axis and a male screw that meshes with the female screw and that is coaxially arranged with the rotating shaft. The switching means includes a protruding shaft protruding from the main shaft toward the advancing / retreating shaft, a locking portion provided at a tip of the protruding shaft, and a valve body side with respect to the locking portion. A washer capable of abutting from the valve, a first bias spring is arranged between the washer and the valve body, and a second bias spring is arranged between the advancing / retreating shaft and the valve body. When the body is located in the hot discharge area,
The locking portion and the washer are separated from each other, and the washer and the advancing / retreating shaft are in contact with each other, whereby the first bias spring that has obtained a reaction force to the advancing / retreating shaft biases the valve element, and the valve element discharges at medium temperature The locking portion engages with the washer when the valve body is located in the region, and the biasing force of the first bias spring with respect to the valve body is released by this, and when the valve body is located in the low temperature discharge region, the valve body and the advancing / retreating shaft are moved. It is preferable that and are engaged with each other and both are integrally advanced and retracted.

In a hot-water mixing valve according to still another aspect (claim 22) of the present invention, a plurality of bias springs are provided as bias springs, and the switching for switching the biasing force of the bias springs acting on the valve body. The means applies a parallel biasing force of all bias springs to the valve body in a direction opposite to the biasing force of the temperature sensitive spring when the valve body is located in the high temperature discharge region, and when the valve body is located in the medium temperature discharge region. The biasing force of some bias springs is applied to the valve element in the direction opposite to the biasing force of the temperature-sensitive spring, and when the valve element is located in the low temperature discharge area, the biasing force of the temperature-sensitive spring acts in the same direction as the biasing force of other bias springs. The urging force is applied to the valve body.

In this hot and cold water mixing valve, when the set temperature for discharging the mixed water is high, the biasing force of the bias springs in parallel presses the valve element in the direction opposite to the temperature sensing spring. The gradient of the shift amount of the valve body (and hence the discharge water temperature) with respect to the rotation angle is large.

When the discharge set temperature of the mixed water is medium, only the biasing force of a part of the bias spring presses the valve body in the direction opposite to the temperature sensitive spring, so the shift amount of the valve body with respect to the rotation angle of the temperature control handle. The gradient of (the discharge water temperature) is therefore smaller than that at the high temperature.

When the discharge set temperature of the mixed water is low, another bias spring urges the valve element in the same direction as the temperature sensitive spring. In this case as well, the gradient of the shift amount of the valve body (and therefore the water discharge temperature) with respect to the rotation angle of the temperature control handle becomes large.

In the case of the hot and cold water mixing valve according to the twenty-second aspect, as in the twenty-third aspect, the water discharge temperature setting member has a female screw on the inner peripheral surface thereof and a rotary shaft rotatably arranged around the axis thereof. ,
A male screw that meshes with the female screw, and a cylindrical advancing / retreating shaft arranged coaxially with the rotating shaft, wherein a second bias spring is arranged between the advancing / retreating shaft and the valve body. And a first and a second column provided on the column and separated from each other in the axial direction.
And a first washer and a second washer respectively disposed on the facing surface side of the first and second flanges, and the first and second washers.
The first washer in a stored state between the washer and the second washer
Of the bias spring and the advancing / retreating shaft, which engages the first washer when the advancing / retreating shaft moves in the direction away from the valve body, and moves the first washer away from the valve body. A flange portion that presses against the valve body and the advancing / retreating shaft, and engages the second washer when the advancing / retreating shaft moves in the direction of approaching the valve body, and the second washer approaches the valve body. It is preferable to include a step portion that is pressed in the direction.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a sectional view of a hot and cold water mixing valve according to a first embodiment (embodiments of the inventions of claims 1 to 5), and FIG. FIG. 3 is a cross-sectional view at the time of high-temperature water discharge, and FIG. 3 is a cross-sectional view at the time of low-temperature water discharge of this hot and cold water mixing valve. In the following description, left and right refer to left and right in FIGS.

A water inlet 12 and a hot water inlet 14 are provided on the peripheral surface of the tubular valve body 10, and a mixed water outlet 16 is provided at the left end. The hot water inlet 14 is located on the left end side of the water inlet 12. A projecting portion 20 is provided by projecting an inner peripheral surface of the body between the inflow ports 12 and 14 inward. The right end surface of the protrusion 20 is a water sheet 22, and the left end surface is a hot water sheet 24.

An annular water valve body 32 facing the water seat 22 and an annular water valve body 34 facing the hot water seat 24 are fitted to the cross-shaped portion 30 a of the main shaft 30. The cross-shaped portion 30a has a cross-shaped cross section perpendicular to the axis of the main shaft 30.

The main shaft 30 can be pressed to the right by a temperature-sensitive spring 40 made of a shape memory alloy, and can be pressed to the left by a first bias spring 42 and a second bias spring 44. This bias bias spring 42,
The rotary shaft 50, the forward / backward shaft 52, the hook 54, and the slide ring 56 are used to move the shaft 44 in the left-right direction.
It is arranged so as to surround.

The handle mounting portion 50a at the right end of the rotary shaft 50
Protrudes rightward from the shaft insertion hole 60 of the body 10 and a handle (not shown) is fixed. This handle mounting part 5
Since the E-ring 62 is fitted to the neck portion of 0a, the rotary shaft 50 cannot move forward and backward. 64 indicates an O-ring.

The left end side of the rotary shaft 50 has a cylindrical shape, and a female screw 50b is provided on the inner periphery thereof. Male screw 52b provided on the outer periphery on the right end side of the tubular forward / backward shaft 52
Is engaged with the female screw 50b, and the forward / backward shaft 52 moves forward and backward by the rotation of the rotary shaft 50.

A flange portion (far end side flange portion) 52a projects inward from the right end of the advancing / retreating shaft 52, and a stopper ring 68 is locked to the flange portion 52a. The stopper ring 68 is slidable in the left-right direction along the inner peripheral surface of the advancing / retreating shaft 52. The tip of the second bias spring 44 is in contact with the stopper ring 68.

A flange part (near end side flange part) 50c is provided on the left end of the advancing / retreating shaft 52 so as to project outward, and the claw part 54c at the right end of the hook 54 can be engaged with the flange part 50c. There is. The hook 54 has a disk portion 54a whose left end side is perpendicular to the axis of the spindle 30 and a plurality of leg pieces 54b extend rightward from the outer periphery of the disk 54a in a direction parallel to the axis of the spindle 30. It is set up. The tips of the leg pieces 54b are bent inward to form the claws 54c. The disk portion 54a has a second
The left end of the bias spring 44 is in contact with.

The slide ring 56 is the disk portion 54.
It overlaps with a.
The right end of the bias spring 42 is in contact with. The left end of the first bias spring 42 is an inward flange portion 32 a of the water valve body 32.
Is in contact with.

The left end side of the water valve body 32 is slidably fitted on the cross-shaped portion 30a of the main shaft 30. The right end side of the hot water valve body 34 is slidably fitted on the cross-shaped portion 30a.

Sealing rings 72 and 74 made of highly slidable fluororesin are fitted on the water valve body 32 and the hot water valve body 34, respectively. These seal rings 72, 74 are in watertight contact with the inner peripheral surface of the body 10.

At the right end of the main shaft 30, there is provided a flange 30b (flange-like engaging portion) having a size capable of entering the collar portion 52a of the advancing / retreating shaft 52 and contacting the stopper ring 68. A flange portion 30c (a flange-shaped locking portion) having a size capable of abutting on the slide ring 56 is provided at an intermediate portion of the main shaft 30 in a protruding manner.

The operation of the hot and cold water mixing valve thus constructed will be described below.

I. When the discharge set temperature is in the middle temperature range of 30 to 50 ° C. (see FIG. 1) When the discharge water temperature (mixed water temperature) of this hot and cold water mixing valve is set in the middle temperature range of 30 to 50 ° C. as shown in FIG. , The combined pressing force of the bias bias springs 42, 44 arranged in series acts on the main shaft 30 in the left direction via the water valve body 32, and the temperature-sensitive spring 40 presses the pressing force in the right direction on the main shaft 30. Acting to balance the pressing force of both, the main shaft 30 and the valve body 3
2, 34 are stopped.

In this medium temperature water discharge state, when the mixed water temperature becomes lower than the set temperature due to fluctuations in the hot water supply temperature, the hot water supply pressure, etc., the temperature sensitive spring 40 contracts, the main shaft 30 moves to the left, and the water sheet 22 The water flow gap between the water valve body 32 and the water valve body 32 narrows, and the hot water flow gap between the hot water sheet 24 and the hot water valve body 34 widens, and the mixed water temperature recovers (rises) to the set temperature.
To do. On the contrary, when the temperature of the mixed water becomes higher than the set temperature, the temperature sensitive spring 40 expands, the water valve body 32 and the hot water valve body 34 are located to the right along with the main shaft 30, and the water circulation gap widens. The hot water flow gap narrows, and the temperature of the mixed water recovers (decreases) to the set temperature.

When the handle is rotated in the forward direction in order to raise the water discharge set temperature within the middle temperature range, the rotary shaft 50
The forward / backward axis 52 moves to the left along with the positive rotation of
The stopper ring 68 also moves to the left. As a result, the biasing force of the bias bias springs 42 and 44 to the left becomes stronger, and the valve bodies 32 and 34 shift to the left together with the main shaft 30,
As the hot water flow gap widens, the water flow gap narrows, and the temperature of the mixed water rises. After the valve bodies 32 and 34 are shifted, the pressing force of the temperature sensitive spring 40 to the right and the pressing force of the bias bias springs 42 and 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the handle is rotated in the opposite direction in order to lower the water discharge set temperature within the middle temperature range, the advancing / retreating shaft 52 moves to the right as the rotating shaft 50 rotates in the opposite direction, The stopper ring 68 also moves to the right. As a result, the pressing force of the bias bias springs 42 and 44 to the left becomes small, the valve bodies 32 and 34 shift to the right together with the main shaft 30, the hot water flow gap narrows and the water flow gap widens, and the mixed water temperature increases. Is reduced. After the shift of the valve bodies 32, 34, the pressing force of the temperature sensitive spring 40 to the right and the pressing force of the bias bias springs 42, 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the set temperature of the discharged mixed water is set in the medium temperature range of 30 to 50 ° C., both the bias bias springs 42 and 44 are effective as described above. When the spring constants of the bias springs 42 and 44 are k ₁ and k ₂ ,
The pressing force to the left of the main shaft 30 is bias bias spring 4
2,44 series combined spring force, whose spring constant is 1 /
It is smaller than (1 / k ₁ + 1 / k ₂ ) and k ₁ and k ₂ .

Therefore, the ratio a / A of the stroke amount (A) of the rotary shaft 50 and the advancing / retreating shaft 52 and the shift amount (a) of the valve bodies 32 and 34 when the set temperature is set to the intermediate temperature range.
Is relatively small. In other words, the shift amount (a) of the valve bodies 32, 34 when the rotary shaft 50 rotates by a unit angle is relatively small. As a result, as shown by the solid line in FIG. 4, when the discharge temperature is set in the medium temperature range, the amount of change in the set temperature when the handle is turned by a unit angle is small.
The temperature line in the graph of has a small slope in the middle temperature range.

II. When the discharge set temperature is in the high temperature range of more than 50 ° C. (see FIG. 2) When the discharge set temperature is more than 50 ° C., the advancing / retreating shaft 52 largely moves to the left and is pressed by the second bias spring 44. The slide ring 56 directly contacts the right end surface of the water valve body 32. Therefore, when the handle is turned to a temperature higher than 50 ° C., the advancing / retreating shaft 52 biases the main shaft 30 to the left via only the second bias spring 44 as shown in FIG. The spring constant when only the second bias spring 44 presses is k ₂ , and the composite spring constant 1 in the intermediate temperature range is 1
It is larger than / (1 / k ₁ + 1 / k ₂ ). Therefore, the ratio a / A of the stroke amount (A) of the advancing / retreating shaft 52 and the shift amount (a) of the valve bodies 32, 34 is larger than that in the middle temperature range. Therefore, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range, and the temperature straight line in the graph of FIG. 4 has a larger gradient in the high temperature range than in the middle temperature range. . That is, if the temperature exceeds 50 ° C., the spouting water temperature changes significantly even if the handle is turned a little.

III. When the discharge set temperature is in the low temperature range of less than 30 ° C. (see FIG. 3) When the discharge set temperature is less than 30 ° C., the advancing / retreating shaft 52 largely moves to the right to move the advancing / retreating shaft 52. The collar portion 52c of the hook and the claw portion 54c of the hook 54 are engaged with each other, and the hook 54 moves forward and backward.
Move to the right with 2. And the slide ring 56
Hits the collar portion 30c, and the first bias spring 42 projects between the water valve body 32 and the slide ring 56 (the collar portion 30c).
The pressing force of the first bias spring 42 does not act on the main shaft 30.

In this case, when the discharge set temperature is remarkably lowered (for example, the handle is turned to the vicinity of "C"), the advancing / retreating shaft 52 moves further to the right, and the flange 30b at the right end of the main shaft 30 causes the stopper ring 68 to move. At this time, the second bias spring 44 presses the main shaft 30 rightward via the stopper ring 68 and the flange 30b, and the hot water valve body 34 is pressed against the hot water sheet 24 by the rightward biasing force of the temperature sensing spring 40.

Therefore, when the handle is turned to the low temperature side of less than 30 ° C., the left biasing force of the bias bias springs 42 and 44 does not act, and the hot water valve body 34 is biased to the right by the temperature sensing spring 40. When the hot water sheet 24 is approached and the discharge set temperature is significantly lowered, the biasing force of the second bias spring 44 acts rightward on the main shaft 30, and the hot water valve body 34 is pressed against the hot water sheet 24 by the temperature sensitive spring 40. Will be available. Therefore, the rotary shaft 5
0 and the stroke amount (A) of the advancing / retreating shaft 52 and the valve bodies 32, 3
The ratio a / A with the shift amount (a) of 4 is larger than that in the middle temperature range. That is, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range.
The temperature straight line in the graph has a larger gradient in the low temperature region than in the medium temperature region. In other words, 30
If the temperature is below ℃, the water temperature will change drastically just by turning the handle a little.

When the handle is turned to a low temperature range of less than 30 ° C., the slide ring 56 is attached to the collar portion 30c.
Before the stopper ring 68 hits the flange 30b
It may be configured to hit.

[Second Embodiment] A second embodiment will be described with reference to FIG.
Embodiments (particularly claims 6 and 7) will be described. In this embodiment, one valve element 33 is configured to adjust both the water flow gap and the hot water flow gap. In this embodiment, contrary to FIGS. 1 to 3, the water inlet 12 is located on the left end side of the hot water inlet 22, and the water sheet 22 is also located on the left end side of the hot water sheet 24. There is.

The valve body 33 includes a central shaft portion 33C located on the axial center of the tubular valve body 10A, and flanges 33A provided at the left and right ends of the central shaft portion 33C.
33B and a cylindrical portion 33E connected to the middle portion in the longitudinal direction of the central shaft portion 33C via a center flange 33D.
And a seal ring 73 mounted on the outer periphery of the cylindrical portion 33E and in watertight contact with the inner peripheral surface of the body 10A, and a through hole 33 provided in each of the flanges 33A, 33B, 33D.
a, 33b, and 33d.

The right end of the temperature sensitive spring 40 is in contact with the flange 33A. The left end of the first bias spring 42 is in contact with the flange 33B. A clutch column 80 is provided between the valve element 33 and the advancing / retreating shaft 52.

This clutch column 80 is a body 10A.
It is possible to move back and forth in the left-right direction along the inner peripheral surface of. A flange portion 80 a is provided so as to project from the inner peripheral surface of the clutch column 80, and the flange portion 80 a and the flange 3 of the valve element 33 are provided.
The first bias spring 42 is interposed between the 3B and 3B in a power storage state.

Further, the second bias spring 44 is interposed between the collar portion 80a and the collar portion 52a of the advancing / retreating shaft 52 in a stored state. A flange portion 80b is provided on the inner peripheral surface at the right end of the clutch column 80, and the flange portion 80b is engageable with the flange portion 52c on the outer peripheral side at the left end of the advancing / retreating shaft 52.

Other configurations of the hot and cold water mixing valve of FIG. 6 are shown in FIGS.
Similar to the hot and cold water mixing valve of No. 3, the same reference numerals indicate the same parts.

The operation of the hot and cold water mixing valve of FIG. 6 thus constructed will be described below.

I. When the discharge set temperature is in the middle temperature range of 30 to 50 ° C. FIG. 6 shows a state in which the discharge water temperature (mixed water temperature) of the hot and cold water mixing valve is set in the middle temperature range of 30 to 50 ° C., for example. In this case, the bias springs 42, 4 arranged in series
The combined pressing force of 4 acts on the valve element 33 in the leftward direction, and the pressing force of the temperature sensitive spring 40 acts on the valve element 33 in the rightward direction.
Both pressing forces are balanced.

In this medium temperature water discharge state, when the mixed water temperature becomes lower than the set temperature due to fluctuations in the hot water supply temperature, the hot water supply pressure, etc., the temperature sensitive spring 40 contracts, the valve element 33 moves to the left, and the water seat 22 The water circulation gap between the valve body 33 and the valve body 33 is narrowed, and the hot water circulation gap between the hot water sheet 24 and the valve body 33 is widened, and the temperature of the mixed water is recovered (increased) to the set temperature. On the contrary, when the temperature of the mixed water becomes higher than the set temperature, the temperature sensitive spring 40 expands, the valve element 33 is located on the right side, and the water circulation gap widens and the hot water circulation gap narrows.
The mixed water temperature recovers (decreases) to the set temperature.

When the handle is rotated in the forward direction in order to increase the water discharge set temperature within the middle temperature range, the rotary shaft 50
The forward / backward axis 52 moves to the left along with the positive rotation of
The clutch column 80 also moves to the left. As a result, the biasing force of the bias springs 42 and 44 to the left becomes strong, the valve element 33 shifts to the left, the hot water flow gap widens and the water flow gap narrows, and the temperature of the mixed water rises. The valve body 3
After the shift of 3, the pressing force of the temperature sensitive spring 40 to the right and the pressing force of the bias springs 42 and 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the handle is rotated in the opposite direction in order to reduce the water discharge set temperature within the middle temperature range, the advancing / retreating shaft 52 moves to the right as the rotating shaft 50 rotates in the opposite direction, The clutch column 80 also moves to the right. As a result, the pressing force of the bias bias springs 42 and 44 to the left becomes small, the valve element 33 shifts to the right, the hot water flow gap becomes narrow and the water flow gap widens, and the temperature of the mixed water decreases. After the valve element 33 is shifted, the pressing force of the temperature sensitive spring 40 to the right and the pressing force of the bias bias springs 42 and 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the set temperature of the discharged mixed water is set in the medium temperature range of 30 to 50 ° C., as described above, both the bias bias springs 42 and 44 arranged in series are effective and the series combined spring constant 1 /. The valve element 33 is pressed to the left at (1 / k ₁ + 1 / k ₂ ). Therefore, similar to the hot and cold water mixing valve of FIGS. 1 to 3, the temperature straight line in the graph of FIG. 4 has a small gradient in the middle temperature range.

II. When the discharge set temperature is higher than 50 ° C. When the discharge set temperature is higher than 50 ° C., the advancing / retreating axis 52 largely moves to the left. The left end of the next clutch column 80 and the flange 33b, the left end of the advancing / retreating shaft 52, and the flange portion 80 of the clutch column 80.
a, the step 52s on the left end side of the male screw 52b of the advancing / retreating shaft 52 and the right end of the clutch column 80 directly contact each other. Therefore, when the handle is turned to a high temperature side of more than 50 ° C., the valve element 33 moves back and forth only by the balance between the rightward pressing force of the temperature sensitive spring 40 and the leftward pressing force of the bias spring 42 or 44. become. The spring constant of the bias spring 42 or 44 is k ₁ or k ₂ , both of which are larger than the combined spring constant 1 / (1 / k ₁ + 1 / k ₂ ) in the medium temperature range. Therefore, the ratio a / A between the stroke amount (A) of the advancing / retreating shaft 52 and the shift amount (a) of the valve element 33 is larger than that in the middle temperature range. Therefore, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range, and the temperature straight line has a larger gradient in the high temperature range than in the middle temperature range as shown in the graph of FIG. Become.

III. When the discharge set temperature is in the low temperature range of less than 30 ° C. When the discharge set temperature is less than 30 ° C., the advancing / retreating shaft 52 largely moves to the right, and the collar 52c of the advancing / retreating shaft 52 is The flange 80b of the clutch column 80 is engaged, and the pressing force of the second bias spring 44 does not act on the valve element 33. In this case, the advancing / retreating shaft 52 and the clutch column 80 are like an integral rigid body. Therefore, when the handle is turned to the low temperature side of less than 30 ° C., the clutch column 80 moves the forward / backward shaft 5
As a result, the ratio a / A between the stroke amount (A) of the rotary shaft 50 and the forward / backward shaft 52 and the shift amount (a) of the valve element 33 is larger than that in the middle temperature range. .
Therefore, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range, and the temperature straight line has a larger gradient in the low temperature range than in the middle temperature range as shown in the graph of FIG. Become.

[Third Embodiment] Referring to FIG. 7, a third embodiment will be described.
The hot and cold water mixing valve according to the embodiment (particularly claims 8 to 11) will be described.

In this embodiment, a pair of flanges 331, 332 are provided on the outer circumference of the flange 33B of the valve body 133.
Is provided. Each flange 331, 332 is a valve body 1
They are arranged at predetermined intervals in the axial direction of 33.
The other structure of the valve body 133 is the same as the valve body 33 of FIG.
Is the same as.

The clutch column 80A is provided with an inward flange portion 80c on the left end side, and this flange portion 80c is arranged between the flanges 331 and 332. Unlike the clutch column 80 of FIG. 6, the collar portion 80b is not provided. Further, unlike the advancing / retreating shaft 52 of FIG.
c is not provided.

The other configurations of the hot and cold water mixing valve of FIG. 7 are the same as those of the hot and cold water mixing valve of FIG. 6, and the same reference numerals indicate the same parts.

I. In the hot and cold water mixing valve of FIG. 7,
Bias springs 42 and 4 are used when the temperature is set to 30 to 50 ° C.
Both 4 are effective in series, and the valve body 133 is pressed to the left by the low spring constant combined in series. Thereby, as shown in FIG. 4, the temperature gradient at the time of medium-temperature water discharge becomes small.

II. When a high temperature of more than 50 ° C. is set, the advancing / retreating shaft 52 largely moves to the left, the latch column 80A also moves to the left, and the flange portion 80c has the flange 331 on the left side.
When the valve body 133 and the clutch column 80 are integrally pressed,
Then, due to the balance with the second bias spring 44, it moves forward and backward.

Since the spring constant of the second bias spring 44 is larger than the spring constant of the bias springs 42 and 44 in series, the temperature gradient becomes large when the temperature is set higher than 50 ° C. as shown in FIG.

III. When set to a low temperature of less than 30 ° C.,
The advancing / retreating shaft 52 largely moves to the right, the collar portion 80c abuts on the right flange 332, and the valve body 133 and the clutch column 80A become as if they were one body.
Since 0A and the valve body 133 move back and forth almost integrally with the forward / backward shaft 52, as shown in FIG. 4, the temperature gradient becomes large when the temperature is set lower than 30 ° C.

In the embodiment shown in FIG. 7,
As set forth in claim 10, when the temperature is set higher than 50 ° C, the forward / backward movement shaft 52
May be pressed against the clutch column 80A, and the valve element 33 may be advanced or retracted by the balance between the second bias spring 44 and the temperature sensitive spring 40.

[Fourth Embodiment] A fourth embodiment will be described with reference to FIG.
The hot and cold water mixing valve according to the embodiment (claims 12, 13, 14, 15) will be described.

This hot and cold water mixing valve has a protruding shaft 334 protruding rightward from the valve body 233 in the hot and cold water mixing valve of FIG. 6, and a flange (locking portion) 335 at the tip of the protruding shaft 334 has a washer 85.
It is configured such that it can be engaged with the advancing / retreating shaft 52 via. The washer 85 is pressed against the left end surface of the collar portion 52a of the advancing / retreating shaft 52 by the second bias spring 44.

Other configurations of the hot and cold water mixing valve of FIG. 8 are the same as those of the hot and cold water mixing valve of FIG. 6 except that the left end of the advancing / retreating shaft 52 is extended to the left.

I. The operation of the hot and cold water mixing valve of FIG. 8 when the discharge water setting temperature is set to the middle temperature range is exactly the same as that of the hot and cold water mixing valve of FIG. 6, and the valve body is composed of the first bias spring 42 and the second bias spring 44. It is biased to the left by a low spring constant in series. In this case, the flange 335 is separated from the washer 85 to the right as shown.

II. When the water discharge set temperature is lower than 30 ° C., the advancing / retreating shaft 52 shifts to the right relative to FIG. 8, the collar portions 52c and 80b are engaged with each other, and the clutch column 80 is pulled to the right. In addition, the washer 85 abuts on the flange 335 as the advancing / retreating shaft 52 shifts to the right, so that the second
The biasing force of the bias spring 44 acts on the valve body 233 rightward via the protruding shaft 334. Therefore, the valve body 233 is strongly biased to the right by the parallel biasing force of the temperature sensitive spring 40 and the biasing force of the second bias spring 44. On the other hand, the biasing force applied leftward to the valve body 233 is only the biasing force of the first bias spring 42. Therefore, the ratio a / A of the stroke amount (A) of the advancing / retreating shaft 52 to the stroke amount (a) of the valve body 233 becomes larger than that in the middle temperature range, and the gradient of the temperature straight line in the low temperature range as shown in FIG. growing.

When the handle is turned to the low temperature side of less than 30 ° C., the collar portions 80b and 52c may come into contact with each other before the washer 85 and the flange 335 come into contact with each other. They may come into contact with each other or at the same time.

III. When the water discharge set temperature is higher than 50 ° C., the advancing / retreating shaft 52 largely moves to the left. And
Next, the left end of the clutch column 80 and the flange 33B, the left end of the advancing / retreating shaft 52 and the flange portion 80 of the clutch column 80.
a, the step portion 52s of the advancing / retreating shaft 52 and the right end surface of the clutch column 80 come into contact with each other, and only the biasing force of one bias spring 42 or 44 is applied to the valve body 233 leftward. On the other hand, the urging force applied rightward to the valve body 233 is only the urging force of the temperature sensitive spring 40. Therefore, the gradient of the temperature straight line becomes large in the high temperature region as shown in FIG.

[Fifth Embodiment] The fifth embodiment will be described with reference to FIG.
The hot and cold water mixing valve according to the embodiment (claim 16) will be described.

In this hot and cold water mixing valve, similarly to the hot and cold water mixing valve shown in FIG. 8, the first flange 335 as the first locking portion at the tip of the protruding shaft 334 is moved forward and backward through the first washer 85. The washer 85 is pressed against the left end surface of the collar portion 52a of the advancing / retreating shaft 52 by the second bias spring 44. In FIG. 9, a second flange 334F as a second locking portion is provided so as to project from the protruding shaft 334. Further, a second washer 85A overlapping from the left side with respect to the flange portion 80a of the clutch column 80 is externally fitted to the protruding shaft 334. The second flange 334F has a size such that it can freely pass through the inner hole of the collar portion 80a and cannot pass through the inner hole of the second washer 85A. The first bias spring 42 is
It is interposed between the second washer 85A and the flange 33B of the valve body 233 in a stored state.

Other configurations of the hot and cold water mixing valve of FIG. 9 are shown in FIG.
It is the same as the hot and cold water mixing valve.

I. The operation of the hot and cold water mixing valve shown in FIG. 9 when the discharge water setting temperature is set to an intermediate temperature range is exactly the same as that of the hot and cold water mixing valve shown in FIG. 8, and the valve element includes the first bias spring 42 and the second bias spring 44. It is biased to the left by a low spring constant in series. In this case, the flange 335 is separated from the washer 85 to the right as shown. Further, the washer 85A is pressed against the collar portion 80a.

II. When the water discharge set temperature is lower than 30 ° C., the advancing / retreating shaft 52 shifts to the right relative to FIG. 8, the collar portions 52c and 80b are engaged with each other, and the clutch column 80 is pulled to the right. Further, as the advancing / retreating shaft 52 shifts to the right, the first washer 85 abuts on the first flange 335, and the biasing force of the second bias spring 44 causes the protruding shaft 334 to move.
It acts on the valve body 233 to the right via the. Therefore, the valve body 233 is strongly biased to the right by the parallel biasing force of the temperature sensitive spring 40 and the biasing force of the second bias spring 44. Further, in this case, the clutch column 80 moves rightward so that the second washer 85A hits the second flange 334F, and the first bias spring 42 causes the flange 3 to move.
3B and 334F are sandwiched between the valve body 233 and
No lateral urging force is applied to the. Therefore, the ratio a / A of the stroke amount (A) of the advancing / retreating shaft 52 to the stroke amount (a) of the valve body 233 becomes larger than that in the middle temperature range, and the gradient of the temperature straight line in the low temperature range as shown in FIG. growing.

In this case, the first bias spring 42
Is in a state of being sandwiched between the flanges 33B and 334F, and exerts no biasing force on the advancing / retreating shaft 52 at all. (Only the biasing force of the second bias spring 44 acts on the advancing / retreating shaft 52.) Therefore, the rotating shaft 50 can be smoothly rotated with a low torque.

III. When the water discharge set temperature is set to a high temperature of more than 50 ° C., the advancing / retreating shaft 52 largely moves to the left. And
The second flange portion 334F of the protruding shaft 334 has the second washer 8
5A, the first bias spring 42 is connected to the flange 334.
Since it is sandwiched between F and 33B, the first bias spring 42 does not apply any biasing force to the valve body 233 in the left-right direction, and only the biasing force of the second bias spring 44 acts on the valve body 233. It will be added to the left. The biasing force applied rightward to the valve body 233 is only the biasing force of the temperature sensitive spring 40. Therefore, the gradient of the temperature straight line becomes large in the high temperature region as shown in FIG.

[Sixth Embodiment] A hot and cold water mixing valve according to a sixth embodiment (claims 12, 13, 17, and 18) will be described with reference to FIG.

In this hot and cold water mixing valve of the hot and cold water mixing valve of FIG. 7, a projecting shaft 522 is provided so as to project leftward from the advancing / retreating shaft 52, and a flange (locking portion) 552 at the tip of this projecting shaft 522 has a washer 87.
The valve body 333 can be engaged with the valve body 333 through. The washer 87 is pressed against the right end surface of the flange 332 of the valve body 333 by the first bias spring 42. The configuration of the valve body 333 is the same as that of the valve body 133 of FIG. 7 except that the position of the flange 33B is displaced slightly to the left of the valve body 333.

Other configurations of the hot and cold water mixing valve of FIG. 10 are shown in FIG.
It is the same as the hot and cold water mixing valve.

I. The operation of the hot and cold water mixing valve of FIG. 10 when the discharge water set temperature is set to the intermediate temperature range is exactly the same as that of the hot and cold water mixing valve of FIG. 7, and the first bias spring 42 and the second bias spring 44 include the valve element 333. Is serially urged to the left and the combined spring constant of this urging force is small, so that the gradient of the temperature straight line in the middle temperature range is small as shown in FIG.

II. When the water discharge setting temperature is lower than 30 ° C., the advancing / retreating shaft 52 shifts to the right of FIG. 10, and the flange 552 contacts the washer 87. Further, the clutch column 80A moves to the right and the collar portion 80c moves to the valve body 33.
When the flange 332 on the right side of 3 is abutted, the biasing force of the first bias spring 42 is applied to the valve body 333 rightward through the clutch column 80A, and the valve body 333 is rotated.
The total (parallel) right biasing force of the temperature-sensitive spring 40 and the first bias spring 42 and the left biasing force of the second bias spring 44 act on.

When the water discharge set temperature is low as described above, the right biasing force of the first bias spring 42 is superimposed on the right biasing force of the temperature-sensitive spring 40, and as a result, it is applied to the valve body 333. The urging force to the right becomes strong and the forward / backward axis 52
The ratio a / A between the stroke amount (A) and the stroke amount (a) of the valve element 333 becomes large, and the temperature gradient at the time of low temperature setting below 30 ° C. becomes large as shown in FIG.

III. When a high temperature of more than 50 ° C. is set, the advancing / retreating shaft 52 largely moves to the left. Then, the flange portion 80c of the next clutch column 80A, the left flange 331 of the valve body 333, the left end of the advancing / retreating shaft 52, and the flange portion 80 of the clutch column 80.
a, and the valve element 333 and the clutch column 80A, or the advancing / retreating shaft 52 and the clutch column 80A become as if they were one, and the valve element 333 is urged to the right by the temperature sensitive spring 40. Bias spring 42 or 44 of
Will be urged to the left by.

Since the spring constant of one of the bias springs 42 or 44 is larger than the spring constant of the bias springs 42 and 44 in series, the temperature gradient becomes large when the temperature is set higher than 50 ° C. as shown in FIG.

[Seventh Embodiment] The hot and cold water mixing valve according to the seventh embodiment (claim 19) will be described with reference to FIG.

This hot and cold water mixing valve is similar to the hot and cold water mixing valve shown in FIG. 10 except that the projecting shaft 522 is provided with a projecting shaft 522 protruding leftward, and a first flange (first engaging member) at the tip of the projecting shaft 522 is provided. Stop)
552 is adapted to be engageable with the valve body 333 via the first washer 87, and the first washer 87 is pressed against the right end surface of the flange 332 of the valve body 333 by the first bias spring 42. ing.

In the embodiment shown in FIG. 11, the protruding shaft 522 is used.
Is provided with a second flange 522F as a second locking portion. Further, the second washer 87A is externally fitted to the protruding shaft 522, and the second washer 87A is attached to the second bias spring 44.
Is pressed against the flange portion 80a of the clutch column 80A from the right side.

The second flange 522F is arranged on the left side of the second washer 87A.

The second flange 522F has a collar portion 80.
Although it can freely pass through the inner hole of a, the second washer 87A has a size that cannot pass through.

Other configurations of the hot and cold water mixing valve of FIG. 11 are the same as those of the hot and cold water mixing valve of FIG.

I. The operation of the hot and cold water mixing valve shown in FIG. 11 when the discharge water setting temperature is set to an intermediate temperature range is exactly the same as that of the hot and cold water mixing valve shown in FIG. 10, and the valve elements are the first bias spring 42 and the second bias spring.
The bias spring 44 urges the valve element 333 in series to the left, and the combined spring constant of this urging force is small, so that the gradient of the temperature straight line in the middle temperature range is small as shown in FIG.

II. When the water discharge set temperature is lower than 30 ° C., the advancing / retreating shaft 52 shifts to the right of FIG. 11, the second flange 552 contacts the first washer 87, and
The clutch column 80A moves to the right and its collar portion 80c
Contact the right flange 332 of the valve body 333, the biasing force of the first bias spring 42 causes the clutch column 80A to move.
Will be added to the valve body 233 to the right through
The valve body 333 is acted by the total (parallel) rightward biasing force of the temperature sensitive spring 40 and the bias spring 42.

Further, in this case, the projecting shaft 522 moves rightward together with the advancing / retreating shaft 52, the second flange portion 522F abuts on the second washer 87A, and the second washer 87A is brought into contact with the collar portion 8.
Separate from 0a to the right. As a result, the second bias spring 44 is sandwiched between the flange portion 522F and the flange portion 52a, and does not apply a biasing force to the valve body 333.

When the discharge water setting temperature is low as described above, the right biasing force of the first bias spring 42 is superimposed on the right biasing force of the temperature-sensitive spring 40, and as a result, it is applied to the valve body 333. Since the urging force to the right becomes strong and the left urging force of the second bias spring 44 disappears, the stroke amount (A) of the advancing / retreating shaft 52 and the stroke amount (a) of the valve body 333 are separated. The ratio a / A becomes large, and as shown in FIG. 4, the temperature gradient becomes large when the temperature is set lower than 30 ° C.

In this case, the second bias spring 44
Since the urging force of 2 does not act on the advancing / retreating shaft 52, the rotating shaft 52 can be smoothly rotated with low torque.

III. When a high temperature exceeding 50 ° C. is set, the advancing / retreating shaft 52 largely moves to the left. Then, the flange portion 80c of the next clutch column 80A, the left flange 331 of the valve body 333, the left end of the advancing / retreating shaft 52, and the flange portion 80 of the clutch column 80.
a, either abut, the valve body 333 and the clutch column 80A, or the advancing / retreating shaft 52 and the clutch column 80A become as if they were integrated, and the valve body 333 and the temperature sensitive spring 40,
Due to the balance with one of the bias springs 42 or 44, it moves back and forth.

Since the spring constant of one of the bias springs 42 and 44 is larger than the spring constant of the bias springs 42 and 44 in series, the temperature gradient becomes large when the temperature is set higher than 50 ° C. as shown in FIG.

[Eighth Embodiment] An eighth embodiment (claims 20 and 21) will be described with reference to FIG. The hot and cold water mixing valve according to this embodiment has bias springs arranged in parallel. In this embodiment,
A first bias spring 401 is interposed between the water valve body 32 and the flange portion 52a of the advancing / retreating shaft 52 ′. This water valve body 32
The flange 30b on the right side of the main shaft 30 'that penetrates through is large enough to pass through the hole 521 of the flange portion 52a. A washer 89 is locked to the flange 30b, and a second bias spring 402 is provided between the washer 89 and the water valve body 32.
Is intervening. The washer 89 has such a size that it cannot pass through the hole 521, and is disposed on the left side of the collar portion 52a at the time of medium temperature water discharge as shown in the figure. A tubular hook 301 projects rightward from the right end surface of the water valve body 32, and a claw portion 302 as a locking portion at the tip of the hook 301 moves forward and backward.
It is engageable with the inward hook 522 of 2 '.

In this embodiment, the hook 301 has a cylindrical shape, and the claw portion 302 has an outward flange shape. The claw portion 302 is arranged on the right side of the collar portion 522, as shown in the drawing.

Other configurations of this hot and cold water mixing valve are shown in FIGS.
It is similar to the hot and cold water mixing valve, and the same reference numerals indicate the same parts.

The operation of the hot and cold water mixing valve of FIG. 12 thus constructed will be described below.

I. When the discharge set temperature is in the middle temperature range of 30 to 50 ° C (see Fig. 12), as shown in Fig. 12, the discharge water temperature of this hot and cold water mixing valve (mixed water temperature)
If, for example, is set to a medium temperature range of 30 to 50 ° C, the first
Only the pressing force of the bias spring 401 acts on the main shaft 30 'to the left via the water valve body 32, and the pressing force of the temperature sensitive spring 40 moves to the right on the main shaft 30' via the hot water valve body 34. It works, and the pressing force of both is balanced. The pressing force of the second bias spring 402 significantly acts on the water valve body 32 and the main shaft 30 ′ in the left and right directions, and the biasing force in the left and right directions against the valve bodies 32 and 34 is zero.

In this medium temperature water discharge state, when the mixed water temperature becomes lower than the set temperature due to fluctuations in the hot water supply temperature, the hot water supply pressure, etc., the temperature sensitive spring 40 contracts and the valve bodies 32, 34 and the main shaft 30 'move to the left. Move, water seat 22 and water valve body 32
The water flow gap between the hot water sheet 24 and the hot water valve body 34 is widened, and the temperature of the mixed water is recovered (increased) to the set temperature. On the contrary, when the temperature of the mixed water becomes higher than the set temperature, the temperature sensitive spring 40 expands,
The water valve body 32 and the hot water valve body 34 move to the right together with the main shaft 30 ′, the water flow gap widens and the hot water flow gap narrows, and the mixed water temperature recovers (decreases) to the set temperature.

When the handle is rotated in the forward direction in order to raise the water discharge set temperature within the middle temperature range, the collar portion 52a
The forward / backward shaft 52 ′ moves to the left within a range in which is not in contact with the washer 89, and the pressing force of the second bias spring 402 to the left becomes strong, and the valve bodies 32 and 34 move to the left together with the main shaft 30 ′. Shift, the hot water distribution gap narrows and the water distribution gap widens,
Mixed water temperature drops. After the valve bodies 32, 34 are shifted, the pressing force of the temperature-sensitive spring 40 to the right and the pressing force of the spring 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the handle is rotated in the opposite direction in order to lower the water discharge set temperature within the middle temperature range, the collar 5
The advancing / retreating shaft 52 ′ moves to the right within a range in which 22 does not contact the claw portion 302, the valve bodies 32 and 34 shift to the left together with the main shaft 30 ′, and the hot water flow gap widens and the water flow gap narrows. The mixed water temperature rises. After the valve bodies 32 and 34 are shifted, the pressing force of the temperature sensitive spring 40 to the right and the pressing force of the spring 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the set temperature of the discharged mixed water is set in the middle temperature range of 30 to 50 ° C., only the first bias spring 401 is effective as described above. That is, each spring 401, 4
When the spring constant of 02 is k ₁ and k ₂ , the pressing force to the left of the main shaft 30 ′ is k _1, which is smaller than the spring constant (k ₁ + k ₂ ) of the parallel combined spring force of the springs 401 and 402. It will be small.

Therefore, the stroke amount (A) of the advancing / retreating shaft 52 'and the valve body 3 when the set temperature is set to the intermediate temperature range.
The ratio a / A with the shift amount (a) of 2, 34 is relatively small. In other words, the shift amount (a) of the valve bodies 32, 34 when the rotary shaft 50 rotates by a unit angle is relatively small.
As a result, as shown by the solid line in FIG. 4, when the discharge temperature is set in the medium temperature range, the change amount of the set temperature when the handle is turned by a unit angle is small, and the temperature straight line in the graph of FIG. The gradient is small in the temperature range.

II. When the discharge set temperature is in the high temperature range of more than 50 ° C. When the discharge set temperature is more than 50 ° C., the advancing / retreating shaft 52 ′ largely moves to the left, and the collar portion 52a of the advancing / retreating shaft 52 ′ moves the washer 89. Pushing to the left, the washer 89 separates from the flange 30b of the main shaft 30 'to the left. Therefore, when the handle is turned to a high temperature side of more than 50 ° C., the advancing / retreating shaft 52 ′ is rotated by the parallel pressing force of the two bias springs 401 and 402, and the main shaft 3 is moved.
0'will be biased to the left. The spring constant when the parallel bias springs 401 and 402 press is k ₁ +
k _2, which is larger than the spring constant k ₁ in the medium temperature range. Therefore, the ratio a / A of the stroke amount (A) of the advancing / retreating shaft 52 'and the shift amount (a) of the valve bodies 32, 34 is larger than that in the middle temperature range. Therefore, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range, and the temperature straight line in the graph of FIG. 4 has a larger gradient in the high temperature range than in the middle temperature range. .

III. When the discharge set temperature is lower than 30 ° C. When the discharge set temperature is lower than 30 ° C., the forward / backward movement shaft 52 '
Moves largely to the right, the flange portion 522 of the advance / retreat shaft 52 ′ and the claw portion 302 of the hook 301 are engaged, and the bias spring 40
The pressing force of 1 does not act on the water valve body 32. in this case,
The advancing / retreating shaft 52 ′ and the water valve body 32 are integrally advanced / retreated, and the stroke amount (A) of the rotary shaft 50 and the advancing / retreating shaft 52.
The ratio a / A between the shift amount (a) of the valve bodies 32 and 34 is larger than that in the middle temperature range. Therefore, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range, and the temperature straight line in the graph of FIG. 4 has a larger gradient in the low temperature range than in the middle temperature range. .

Even after the hot water valve body 34 abuts the hot water seat 24, if the forward / backward shaft 52 'is moved further rightward by further turning the handle to the low temperature side, the cross-shaped portion 30a
And the water valve body 32 are separated from each other.

[Ninth Embodiment] A ninth embodiment (claims 22 and 23) will be described with reference to FIG. In this embodiment, as in FIG. 6, one valve body 433 is used.
Are configured to regulate both the water flow gap and the hot water flow gap.

The valve body 433 has a column 335 protruding rightward from the flange 33B, and first and second flanges 336 and 337 projecting from the outer periphery of the column 335. The second collar 337 is located at the right end of the column 335. The first and second washers 91, 92 are arranged between the flange portions 336, 337, and the first bias spring 42 is interposed between the washers 91, 92 in a force-accumulating state. The first washer 91 has a size such that it can be engaged with a collar portion 526 described later.

The advancing / retreating shaft 520 has a cylindrical portion 52 extending leftward.
5, and an inward flange portion 526 is projectingly provided at the left end of the tubular portion 525. This collar portion 526 is the above first
It is located on the left side of the collar portion 336. This collar 52
The inner diameter of 6 is larger than the outer diameter of the collar portion 336.

On the inner peripheral surface of the advancing / retreating shaft 520, the above-mentioned collar 3 is formed.
A step portion 527 is provided on the right side of 37. The inner diameter of the advancing / retreating shaft 520 is small on the right side of the step portion 527, but the second flange portion 337 has a diameter smaller than this small diameter portion and does not contact the step portion 527. . The washer 92 that overlaps the collar portion 337 is of a size that can abut the step portion 527.

The flange 33B of the valve element 433 and the advancing / retreating shaft 52
The second bias spring 44 is interposed between the No. 0 collar portion 52a.

Other configurations of the hot and cold water mixing valve of FIG. 13 are shown in FIG.
The same as the hot and cold water mixing valve, and the same reference numerals indicate the same parts.

The operation of the hot and cold water mixing valve of FIG. 13 thus constructed will be described below.

I. When the discharge set temperature is in the middle temperature range of 30 to 50 ° C. FIG. 13 shows a state in which the discharge water temperature (mixed water temperature) of the hot water mixing valve is set in the middle temperature range of 30 to 50 ° C., for example. In this case, only the pressing force of the second bias spring 44 acts on the valve body 433 in the left direction, and the pressing force of the temperature-sensitive spring 40 acts on the valve body 433 in the right direction, so that the pressing forces of both are balanced. is doing. The first bias spring 42 has a collar portion 3.
The valve element 433 is arranged between the valve 36 and the valve 337 and does not apply a biasing force to the valve element 433.

In this medium temperature water discharge state, when the mixed water temperature falls below the set temperature due to fluctuations in the hot water supply temperature, hot water supply pressure, etc., the temperature sensitive spring 40 contracts, the valve element 433 moves to the left, and the water seat 22 The water flow gap between the valve body 33 and the valve body 33 is narrowed, and the water flow gap between the hot water seat 24 and the valve body 433 is widened, and the mixed water temperature is recovered (increased) to the set temperature.
To do. On the contrary, when the temperature of the mixed water becomes higher than the set temperature, the temperature sensitive spring 40 expands, the valve element 433 is located on the right side, the water circulation gap widens and the hot water circulation gap narrows, and the mixed water temperature rises. Recovers (decreases) to the set temperature.

When the handle is rotated in the forward direction in order to raise the water discharge set temperature within the middle temperature range, the step 527
The advancing / retreating shaft 520 moves to the left within a range in which is not in contact with the washer 92, the pressing force of the second bias spring 44 to the left becomes strong, the valve body 433 shifts to the left, and the hot water flow gap becomes As it spreads, the water flow gap narrows and the temperature of the mixed water rises.
After the shift of the valve body 433, the pressing force of the temperature sensitive spring 40 to the right and the pressing force of the second bias spring 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the handle is rotated in the opposite direction in order to lower the discharge water set temperature within the middle temperature range, the collar 5
The advancing / retreating shaft 520 moves to the right within a range in which 26 does not contact the washer 91, the valve element 433 shifts to the right along with the second bias spring 44, and the hot water flow gap narrows and the water flow gap widens, resulting in mixing. Water temperature drops. After the valve body 433 is shifted, the pressing force of the temperature sensitive spring 40 to the right and the pressing force of the second bias spring 44 to the left are balanced. When the temperature of the mixed water deviates from the set temperature, the temperature sensitive spring 40 expands and contracts to restore the temperature of the mixed water to the set temperature.

When the set temperature of the discharged mixed water is set in the medium temperature range of 30 to 50 ° C., only one second bias spring 44 is effective as described above, and the bias bias spring 4
The valve element 43 has a spring constant lower than that of the parallel arrangement of 2,44.
Press 3 to the left. Therefore, similar to the hot and cold water mixing valve of FIGS. 1 to 3, the temperature straight line in the graph of FIG. 4 has a small gradient in the middle temperature range.

II. When the discharge set temperature is higher than 50 ° C. When the discharge set temperature is higher than 50 ° C., the advancing / retreating shaft 520 largely moves to the left, and the step portion 527 contacts the washer 92,
The washer 92 is moved to the left. As a result, the bias bias springs 42 and 44 press the valve body 433 to the left side by side. Therefore, the ratio a / A between the stroke amount (A) of the advancing / retreating shaft 520 and the shift amount (a) of the valve body 433 is larger than that in the middle temperature range. Therefore, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range, and the temperature straight line has a larger gradient in the high temperature range than in the middle temperature range as shown in the graph of FIG. Become.

III. When the discharge set temperature is lower than 30 ° C. When the discharge set temperature is lower than 30 ° C., the forward / backward shaft 520
Moves largely to the right, and the collar portion 526 of the advancing / retreating shaft 520 pushes the washer 91 to the right. As a result, the parallel (total) biasing force of the temperature sensitive spring 40 and the first bias spring 42 is applied to the valve body 433 in the rightward direction, and the biasing force of the second bias spring 44 is applied in the leftward direction. The ratio a / A of the stroke amount (A) of the rotary shaft 50 and the advance / retreat shaft 520 and the shift amount (a) of the valve body 433 when the handle is turned in the low temperature range of less than 30 ° C. is in the middle temperature range. Big compared to. Therefore, the amount of change in the set temperature when the handle is turned by a unit angle is larger than that in the middle temperature range, and the temperature straight line has a larger gradient in the low temperature range than in the middle temperature range as shown in the graph of FIG. Become.

[0146]

As described above, according to the present invention, when the discharge mixed water temperature is set in the middle temperature range, the temperature scale interval can be set large and the set temperature can be finely adjusted. Moreover, according to the present invention, the temperature of the discharged mixed water can be set in the low temperature range to the high temperature range without increasing the rotation range of the temperature control handle.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hot and cold water mixing valve according to a first embodiment.

FIG. 2 is a cross-sectional view of the hot and cold water mixing valve of FIG. 1 in a high temperature water discharge state.

3 is a sectional view of the hot and cold water mixing valve of FIG. 1 in a low temperature water discharge state.

4 is an operating characteristic diagram of the hot and cold water mixing valve of FIG. 1. FIG.

FIG. 5 is an explanatory view of a temperature control handle of the hot and cold water mixing valve.

FIG. 6 is a sectional view of a hot and cold water mixing valve according to a second embodiment.

FIG. 7 is a sectional view of a hot and cold water mixing valve according to a third embodiment.

FIG. 8 is a sectional view of a hot and cold water mixing valve according to a fourth embodiment.

FIG. 9 is a sectional view of a hot and cold water mixing valve according to a fifth embodiment.

FIG. 10 is a sectional view of a hot and cold water mixing valve according to a sixth embodiment.

FIG. 11 is a sectional view of a hot and cold water mixing valve according to a seventh embodiment.

FIG. 12 is a sectional view of a hot and cold water mixing valve according to an eighth embodiment.

FIG. 13 is a sectional view of a hot and cold water mixing valve according to a ninth embodiment.

[Explanation of symbols]

10 valve body 12 Water inlet 14 Hot water inlet 22 Water sheet 24 hot water sheet 30 spindles 30b Flange (flange-like locking part) 30c Collar part (collar-shaped locking part) 32 water valve 33 valve body 34 Hot water valve 42 First Bias Spring 44 Second bias spring 50 rotation axis 50a Handle mounting part 50b female screw 50c collar part 52 axis 52a, 52c Collar part 52b male screw 54 hook 54a disk part 54b Leg piece 54c claw 56 slide ring 72, 73, 74 Seal ring 80 clutch column 80a, 80b, 80c Collar part 85 First Washer 85A Second washer 133, 233, 333, 433 Valve body 335 First flange (first locking portion) 334F Second flange (second locking portion) 401 First bias spring 402 Second bias spring

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16K 11/07 F16K 31/64

Claims (23)

(57) [Claims] 1. A valve body having a water seat and a hot water seat provided in a tubular valve body, capable of advancing and retracting in the axial direction of the valve body, and capable of coming into contact with and separating from the water seat and the hot water seat. A temperature-sensitive spring arranged coaxially with the valve body for urging the valve body toward the hot water seat, a bias spring for urging the valve body toward the water seat, and a bias spring for the valve body shaft. In a hot and cold water mixing valve provided with a discharge water temperature setting member for advancing and retracting in the direction of the core line, when the valve body is located in the medium temperature discharge range and when the valve body is located in the low temperature discharge range or the high temperature discharge range. The hot and cold water mixing valve is characterized in that urging force switching means for changing the urging force of the bias spring is provided. 2. A plurality of bias springs are provided as the bias springs according to claim 1, wherein the switching means is provided for a part of the bias springs when the valve body is located in a low temperature discharge area or a high temperature discharge area. A hot and cold water mixing valve characterized in that an urging force is applied to the valve element, and when the valve element is located in the medium temperature discharge region, the urging forces of all bias springs are applied in series to the valve element. 3. The valve body according to claim 2, wherein the valve body is supported by a main shaft coaxially arranged with the valve body, the main shaft is movable in the axial direction of the valve body, and the discharge water temperature setting is performed. The member has a female screw on the inner peripheral surface thereof, has a rotating shaft coaxially arranged with the main shaft, and has a male screw meshing with the female screw, and has a cylindrical shape coaxially arranged with the main shaft. The advancing / retreating shaft, the far end side flange part and the near end side flange part respectively provided at the far end and the near end end of the valve body of the advancing / retreating shaft, and in the axial center direction with respect to the advancing / retreating shaft. It is movably fitted,
A hook whose movement in the valve body approaching direction is restricted by engaging with the near-end side end is fitted to the main shaft so as to be movable in the axial center line direction. And a slide ring capable of abutting on the hook and a collar-shaped engaging portion provided midway in the longitudinal direction of the main shaft, and between the slide ring and the valve body. A hot and cold water mixing valve characterized in that a first bias spring is interposed in a force-accumulating state, and the second bias spring is interposed in a force-accumulating state between the hook and the distal end side flange portion. . 4. The switching means according to claim 3, wherein the switching unit is provided with the main shaft projecting from the valve body, a flange-shaped locking portion provided at a tip of the main shaft, and the main shaft. And a stopper ring urged by the second bias spring in a direction to be pressed against the distal end side flange of the advancing / retreating shaft, and in a direction in which the hook is pressed by the first bias spring. When the valve body is located in the medium temperature discharge region, the flange-shaped locking portion and the stopper ring are separated from each other, and the stopper ring is moved forward and backward by the second bias spring. It is pressed against the distal end side flange part of the shaft, and the flange-shaped locking part and the slide ring are separated from each other, and the slide ring is pressed against the hook by the first bias spring, so that the valve body is low. When located in the discharge area, the flange-shaped locking portion engages with the stopper ring, and the movement of the hook in the valve body approaching direction is restricted by the engagement of the hook and the near end side flange portion, As a result, the urging force of the second bias spring is applied to the valve body in the same direction as the urging force of the temperature-sensitive spring via the stopper ring and the main shaft, and the flange-shaped engaging portion engages with the slide ring. However, the hot and cold water mixing valve is characterized in that the biasing force of the first bias spring does not act on the valve body and the advancing / retreating shaft. 5. The discharge water temperature setting member according to claim 2, wherein the discharge water temperature setting member has a female screw on an inner peripheral surface thereof, and a rotary shaft coaxially arranged with the valve body and a male screw engaged with the female screw. And a cylindrical advancing / retreating shaft arranged coaxially with the rotating shaft, and a clutch column movable in the axial direction of the valve body, and between the clutch column and the valve body. A hot and cold water mixing valve characterized in that a first bias spring is interposed in a force-accumulating state, and a second bias spring is interposed in a force-accumulating state between the clutch column and the advancing / retreating shaft. 6. The clutch column according to claim 5, wherein the clutch column engages with the advancing / retreating shaft when the valve element is located in the low temperature discharge region,
A hot and cold water mixing valve characterized in that movement of the clutch column in the valve body approaching direction is restricted. 7. The clutch column according to claim 5, wherein the clutch column is pressed against the valve disc or the advancing / retreating shaft when the valve disc is located in the high temperature discharge region, and movement of the clutch column in the axial direction is restricted. Hot and cold water mixing valve. 8. The valve body according to claim 5, wherein the valve body is provided with a pair of flanges spaced apart from each other in the axial direction, and the clutch column is provided with a collar portion arranged between the flanges. A hot and cold water mixing valve characterized by being provided. 9. The flange according to claim 8, wherein the flange portion of the clutch column is pressed against the flange on the side closer to the valve body when the valve body is positioned in the high-temperature discharge region, and A hot and cold water mixing valve whose movement is restricted. 10. The flange of the clutch column is pressed against the flange on the side far from the valve body when the valve body is positioned in the low temperature discharge region according to claim 8, the axial direction of the clutch column A hot and cold water mixing valve whose movement is restricted. 11. The clutch column according to claim 8, wherein the clutch column is pressed against the advancing / retreating shaft when the valve body is positioned in the high temperature discharge region, and movement of the clutch column in the axial direction is restricted. Hot and cold water mixing valve. 12. The bias spring according to claim 1, wherein a plurality of bias springs are provided, and the switching means has a direction opposite to the biasing force of the temperature sensitive spring when the valve body is located in the medium temperature discharge region. The biasing force of each bias spring in series is applied to the valve element, and when the valve element is located in the low temperature discharge area, the biasing force of a part of the bias spring is applied to the valve element in the same direction as the biasing force of the temperature sensitive spring. A hot and cold water mixing valve. 13. The discharge water temperature setting member according to claim 12, wherein the discharge water temperature setting member has a female screw on an inner peripheral surface thereof, the rotary shaft being rotatably arranged around the shaft center thereof, and the male screw meshing with the female screw. And a cylindrical advancing / retreating shaft arranged coaxially with the rotating shaft, and a clutch column movable in the axial direction of the advancing / retreating shaft, between the clutch column and the valve body. A hot and cold water mixing valve characterized in that a first bias spring is arranged in the first column, and a second bias spring is arranged between the clutch column and the forward / backward shaft. 14. The engaging part according to claim 13, wherein an engaging part for engaging the advancing / retreating shaft and the clutch column when the low temperature is set by the discharge water temperature setting member is provided, and the switching means is provided from the valve body. A projecting shaft projecting toward the advancing / retreating shaft, a locking portion provided at a tip of the projecting shaft, and a washer biased in a direction to be pressed to the advancing / retreating shaft by the second bias spring. Therefore, when the valve body is located in the high temperature discharge area and the medium temperature discharge area,
The lock portion and the washer are separated from each other, the washer is pressed against the advancing / retreating shaft by the second bias spring, and the lock portion engages with the washer when the valve body is in the low temperature discharge region. And the movement of the clutch column in the valve body approaching direction is regulated by the engaging portion, whereby the second
The biasing force of the bias spring is applied to the valve body in the same direction as the biasing force of the temperature-sensitive spring via the washer and the protruding shaft. 15. The clutch column according to claim 14, wherein the clutch column is in contact with the valve body or the advancing / retreating shaft when the valve body is located in the high temperature discharge region, and movement of the clutch column in the axial direction is restricted. Hot and cold water mixing valve. 16. The engaging unit according to claim 13, wherein an engaging portion that engages the advancing / retreating shaft and the clutch column when the low temperature is set by the discharge water temperature setting member is provided, and the switching unit is provided from the valve body. A projecting shaft projecting toward the advancing / retreating shaft; a first locking part provided at the tip of the projecting shaft; a second locking part provided in the middle of the projecting shaft; A first washer biased in a direction to be pressed to the advancing / retreating shaft by the second bias spring, and a second washer biased in a direction to be pressed to the clutch column by the first bias spring, When the valve body is located in the medium temperature discharge region, the first locking portion and the first washer are separated from each other, and the first washer is pressed against the advancing / retreating shaft by the second bias spring, and Two
And the second washer is separated from the locking portion of the
Is pressed against the clutch column by the bias spring of, and the first locking portion engages with the first washer when the valve body is located in the low temperature discharge region, and the engagement portion causes the clutch column to move. The movement in the valve body approaching direction is restricted, whereby the biasing force of the second bias spring is applied to the valve body via the washer and the protruding shaft in the same direction as the biasing force of the temperature-sensitive spring, and The hot water mixing valve is characterized in that the second locking portion engages with the washer, and the biasing force of the first bias spring does not act on the valve element and the advancing / retreating shaft. 17. The engaging part according to claim 13, wherein an engaging part for engaging the clutch column and the valve body when the low temperature is set by the discharge water temperature setting member is provided, and the switching means is provided from the advancing / retreating shaft. A projecting shaft projecting toward the valve body, a locking portion provided at a tip of the projecting shaft, and a washer biased in a direction to be pressed against the valve body by the first bias spring. Therefore, when the valve body is located in the high temperature discharge area and the medium temperature discharge area,
The locking portion and the washer are separated from each other, the washer is pressed against the valve body by the first bias spring, and the locking portion engages with the washer when the valve body is located in the low temperature discharge region. And the movement of the clutch column in the direction away from the valve body is restricted by the engaging portion, whereby the biasing force of the first bias spring is applied to the valve body via the washer, the salient shaft and the clutch column. A hot and cold water mixing valve that is applied in the same direction as the biasing force of a temperature sensitive spring. 18. The clutch column according to claim 17, wherein when the valve body is located in the high temperature discharge region, the clutch column contacts the valve body or the advancing / retreating shaft, and movement of the clutch column in the axial direction is restricted. Hot and cold water mixing valve. 19. The engagement unit according to claim 13, further comprising: an engagement portion that engages the clutch column and the valve body when a low temperature is set by the discharge water temperature setting member, and the switching unit moves from the advancing / retreating shaft. A projecting shaft projecting toward the valve body, a first locking part provided at the tip of the projecting shaft, a second locking part provided in the middle of the projecting shaft, A first washer biased in the direction of being pressed against the valve body by the first bias spring, and a second washer biased in the direction of being pressed against the clutch column by the second bias spring, When the valve body is located in the medium temperature discharge region, the first locking portion and the first washer are separated from each other, and the first washer is pressed against the valve body by the first bias spring, and The locking portion of 2 and the second washer are separated from each other, and the second washer is It is pressed against the clutch column by the bias spring of No. 2, and when the valve body is located in the low temperature discharge region, the engaging portion engages with the washer, and the engaging portion separates the clutch column from the valve body. The movement of the first bias spring is restricted in this direction, and the urging force of the first bias spring is applied to the valve body in the same direction as the urging force of the temperature-sensitive spring via the washer, the salient shaft and the clutch column. A hot and cold water mixing valve characterized in that the second locking portion is engaged with the washer so that the biasing force of the second bias spring does not act on the valve element and the advancing / retreating shaft. 20. A plurality of bias springs are provided as the bias springs according to claim 1, wherein the switching means for switching the biasing force of the bias springs acting on the valve body is such that the valve body is in a high temperature discharge range. When it is located, the biasing force of all the bias springs is applied to the valve body in the opposite direction to the biasing force of the temperature sensitive spring, and when the valve body is in the medium temperature discharge range, it is opposite to the biasing force of the temperature sensitive spring. A hot and cold water mixing valve characterized in that a biasing force of a part of a bias spring is applied to a valve body, and when the valve body is located in a low temperature discharge region, the valve body is directly advanced and retracted by the water discharge temperature setting member. 21. The valve body according to claim 20, wherein the valve body is supported by a main shaft coaxially arranged with the bubble body, and the main shaft is movable back and forth in an axial center line direction of the bubble body. The member has a female screw on the inner peripheral surface thereof, has a rotating shaft rotatably arranged around its axis, and has a male screw meshing with the female screw, and is arranged coaxially with the rotating shaft. The switching means includes a protruding shaft projecting from the main shaft toward the advancing and retracting shaft, a locking portion provided at a tip of the protruding shaft, and the locking shaft. A washer capable of abutting against the valve body from the valve body side, and a first bias spring is arranged between the washer and the valve body,
A second bias spring is arranged between the advancing / retreating shaft and the valve element, and when the valve element is located in the high temperature discharge region, the locking portion and the washer are separated from each other, and the washer and the advancing / retreating axis are in contact with each other. As a result, the first bias spring, which has a reaction force on the advancing / retreating axis, urges the valve body, and when the valve body is located in the medium temperature discharge area, the locking portion engages with the washer, which causes The biasing force of the first bias spring on the valve body is eliminated, and when the valve body is located in the low temperature discharge region, the valve body and the advancing / retreating shaft engage with each other, and both of them advance and retract integrally. valve. 22. A plurality of bias springs are provided as the bias springs according to claim 1, wherein the switching means for switching the biasing force of the bias springs acting on the valve body is characterized in that the valve body has a high temperature discharge range. When the valve body is located at, the biasing force of all the bias springs acts in parallel in the direction opposite to the biasing force of the temperature sensitive spring. It is possible to apply the biasing force of some bias springs to the valve element, and to apply the biasing force of another bias spring to the valve element in the same direction as the biasing force of the temperature sensitive spring when the valve element is located in the low temperature discharge region. Characteristic hot and cold water mixing valve. 23. The discharge water temperature setting member according to claim 22, wherein the discharge water temperature setting member has a female screw on an inner peripheral surface thereof, the rotary shaft being rotatably arranged around the axis thereof, and the male screw meshing with the female screw. And a cylindrical advancing / retreating shaft arranged coaxially with the rotating shaft, wherein a second bias spring is arranged between the advancing / retreating shaft and the valve body, and First and second flanges provided separately from each other in the axial direction, and first washers and a second washer respectively arranged on the facing surfaces of the first flange and the second flange. A washer, a first bias spring interposed between the first washer and the second washer in a stored state, and a direction in which the forward / backward shaft is separated from the valve body. Engaging the first washer when moving to
A collar portion that presses the washer in the direction away from the valve body, and a flange provided on the advancing / retreating shaft, which engages the second washer when the advancing / retreating shaft moves in a direction approaching the valve element A hot and cold water mixing valve comprising: a step portion that presses the second washer in a direction approaching the valve body.