JP4907473B2 - Hot water mixing valve - Google Patents

Description

  The present invention relates to a hot and cold water mixing valve, and is particularly suitable for application to a valve having an automatic temperature adjustment function that finely moves a valve body based on temperature sensing by a temperature sensitive spring and automatically adjusts the temperature of mixed water to a set temperature. It relates to a hot water mixing valve.

2. Description of the Related Art Conventionally, a hot water / water mixing valve having an automatic temperature adjustment function having a function of automatically adjusting the temperature of mixed water to a set temperature has been widely used.
For example, Patent Document 1 listed below discloses a hot water / water mixing valve with an automatic temperature control function of this type.
FIG. 10 shows a specific example thereof.

In FIG. 10, reference numeral 200 denotes a cylindrical valve case, and 202 and 204 denote a water inflow passage and a hot water inflow passage provided through the valve case 200 in the radial direction. Here, the water inflow passage 202 and the hot water inflow passage 204 are provided at positions separated in the axial direction.
Reference numeral 206 denotes a valve body in the hot water / water mixing valve, which has a water side valve portion 208 and a hot water side valve portion 210.
The valve body 206 changes the valve opening degree of the water side valve portion 208 and the hot water side valve portion 210 in a reverse relationship to each other so that the inflow amount of water and the inflow of hot water from the water inflow passage 202 and the hot water inflow passage 204 are changed. Change the amount.

Water and hot water that have flowed in from the water inflow passage 202 and the hot water inflow passage 204 are mixed in the mixing chamber 212, flow out from the outlet 214, and are sent to a predetermined water discharge section.
In the mixing chamber 212, a temperature-sensitive spring 216 made of a shape memory alloy coil spring is provided, and the valve body 206 faces rightward in the figure, that is, the valve opening degree of the hot water side valve section 204 by the temperature-sensitive spring 216. Is reduced, and the valve opening of the water side valve portion 208 is increased.

Reference numeral 218 denotes a rotary operation shaft connected to the handle in an integrally rotated state, and integrally includes a large-diameter cylindrical portion 220 inside the valve case 200.
Reference numeral 222 denotes a drive member that is moved forward and backward in the valve case 200 in the axial direction by the rotation operation shaft 218, and has a male screw on the outer peripheral surface. Screwed into the female screw.
Accordingly, when the rotation operation shaft 218 is rotated, the drive member 222 is moved back and forth in the left-right direction in the drawing by screw feed.

  Between the valve body 206 and the drive member 222, a first bias spring 224 and a second bias spring 226 made of a normal metal coil spring are provided with a first spring receiver 228, a second spring receiver 230, and a stopper ring. The biasing force of the first bias spring 224 and the second bias spring 226 exerts on the valve body 206 in the left direction in the figure, that is, in the direction opposite to the biasing direction by the temperature-sensitive spring 216. Has been.

Reference numeral 234 denotes a central shaft provided at the central portion in the radial direction of the valve case 200. The left end in the figure is screwed to the valve body 206, and the valve body 206 moves in the axial direction integrally with the central shaft 234. ing.
A head 236 having a larger diameter than the inner diameter of the stopper ring 232 is provided at the right end of the central shaft 234 in the drawing.

In this hot and cold water mixing valve, when the rotary operation shaft 218 is rotated to the high temperature side, the drive member 222 is pushed in the left direction in the figure and moved forward in the same direction.
At this time, the first bias spring 224 and the second bias spring 226 are deformed in the compression direction to increase the leftward biasing force on the valve body 206 in the drawing.

  As a result, the valve body 206 moves to the left in the drawing to a position where the increased biasing force in the left direction in the drawing by the first bias spring 224 and the second bias spring 226 and the right biasing force in the temperature sensing spring 216 are balanced. Accordingly, the valve opening degree of the water side valve part 208 is made small, and the valve opening degree of the hot water side valve part 210 is made large.

As a result, while the amount of water inflow from the water inflow passage 202 decreases, the amount of hot water inflow from the hot water inflow passage 204 increases and the temperature of the mixed water rises.
That is, the temperature of the mixed water is set to the high temperature side by the rotation operation of the rotation operation shaft 218 described above.

When the mixed water temperature changes in this state, for example, when the mixed water temperature changes to the high temperature side, the temperature-sensitive spring 216 extends in the axial direction to increase the right biasing force against the valve body 206, and the valve body 206 is moved to the right in the figure. Slightly move.
Here, the valve opening degree of the hot water side valve section 210 is small and the valve opening degree of the water side valve section 208 is large, so that the amount of hot water flowing into the mixing chamber 212 and water The mixed water temperature is automatically adjusted to the set temperature.

  Conversely, when the temperature of the mixed water changes to the low temperature side, the urging force of the temperature sensing spring 216 decreases, and as a result, the valve body 206 slightly moves to the left in the figure to increase the valve opening of the hot water side valve section 210, The valve opening of the water side valve unit 208 is reduced, the amount of inflow of water is reduced, the amount of inflow of hot water is increased to raise the mixed water temperature, and the mixed water temperature is automatically adjusted to the set temperature.

In this hot and cold water mixing valve, the center shaft 234 functions as follows.
When the rotary operation shaft 218 is rotated to the high temperature side, the valve body 206 can move to a position where the water side valve portion 208 is fully closed and the hot water side valve portion 210 is fully opened by contracting the temperature sensing spring 216. Is possible.

  On the other hand, when the rotary operation shaft 218 is rotated to the low temperature side, the temperature sensing spring 216 is fully extended while the valve body 206 is moving in the right direction in FIG. As described above, the valve body 206 cannot move rightward in the figure. That is, the water side valve portion 208 cannot be fully opened and the hot water side valve portion 210 cannot be fully closed.

Therefore, in this hot / cold water mixing valve, when the driving member 222 is largely moved backward in the right direction in the figure, the stopper ring 232 is brought into contact with the head 236 of the central shaft 234 so that the right driving force from the driving member 222 in the figure is applied. This is transmitted to the central shaft 234 via the second spring bearing 230 and the second bias spring 226.
Then, the central shaft 234 moves together with the drive member 222 in the right direction in the drawing to move the valve body 206 in the same direction, forcibly fully closes the hot water side valve portion 210 and fully opens the water side valve portion 208.

By the way, in this seed hot / cold water mixing valve, the temperature-sensitive spring 216 has a small stroke that allows temperature expansion and contraction, and accordingly, the movement stroke of the valve body 206 that moves forward and backward in the same axial direction as the temperature-sensitive spring 216 is also limited to be small. End up.
Accordingly, it is difficult to increase the flow passage areas of the water inflow passage 202 and the hot water inflow passage 204. For this reason, in the low pressure area where the water supply and hot water supply pressure is low, a sufficient discharge flow rate of the mixed water cannot be obtained, or a large When a large amount of mixed water is to be discharged from the water discharging device, there is a problem that the request cannot be sufficiently satisfied.

However, if the hot water mixing valve including the valve body 206, the water inflow passage 202, and the hot water inflow passage 204 is made larger, water discharge at a larger flow rate is possible. In this case, however, the hot water mixing valve is large in the radial direction. It will become.
Alternatively, it is possible to increase the water discharge flow rate by using a long spring in the axial direction as the temperature-sensitive spring 216 and increasing the expansion / contraction stroke, but in this case the axial length of the hot water / water mixing valve is increased. Similarly, the hot water / water mixing valve is increased in size, and the temperature-sensitive spring 216 is an expensive member, which inevitably increases the cost of the hot / water mixing valve.

In addition, the following patent document 2 discloses a hot and cold water mixing valve for the purpose of increasing the discharged water flow rate.
In this hot and cold water mixing valve, the valve body is provided so as to be movable in the axial direction, and the valve body and a support provided at the center of the valve case are connected via a rotating arm that can be rotated about a support portion by the support. And the biasing force of the temperature-sensitive spring and the bias spring is applied to the intermediate position in the radial direction of the rotating arm via the movable sleeve and the movable column, thereby moving the movable column in the axial direction. The valve body is moved in the axial direction with a stroke larger than the expansion / contraction stroke of the temperature-sensitive spring.

However, in the case of the hot water / water mixing valve disclosed in Patent Document 2, the required number of parts is large, which increases the cost of parts and assembly, and the stability and reliability of the temperature control function by increasing the number of components. There is a problem that is low.
In addition, a pivot arm extending in the radial direction must be provided between the valve body and the support column at the center of the valve case that supports the valve body so as to be swingable. This causes the problem of upsizing.

  The hot water and water mixing valve with automatic temperature adjustment function has been described above. However, these problems do not have the function of adjusting the position of the valve body to the position corresponding to the set temperature by the temperature sensitive spring and automatically adjusting the mixed water temperature to the set temperature. Even if it is a normal mixing type hot water / water mixing valve (a normal mixing type hot water / water mixing valve in which the position of the valve body is fixed after the valve body is moved to a predetermined position by operating the operation member) This is a problem that can occur in common in those that perform temperature control by moving the body in the axial direction.

JP 2001-4050 A Japanese Patent No. 3882193

  The present invention has been made for the purpose of providing a hot and cold water mixing valve that is capable of supplying mixed water at a large flow rate to a water discharge section, and that is small, inexpensive, and has high operational reliability. .

  Accordingly, the present invention comprises (a) a cylindrical valve case, (b) a water inflow passage, a hot water inflow passage provided in the valve case in an axial direction, and (c) a water side. A valve part and a hot water side valve part, and the valve openings of the water side valve part and the hot water side valve part are changed in magnitude in reverse relation to each other, A hot water mixing valve that mixes water and hot water while changing the temperature of the mixed water by operating the valve body in accordance with the operation of the operating member, and changing the temperature of the mixed water. Oscillating in the radial direction of the valve case with a portion between the water side valve portion and the hot water side valve portion as a fulcrum, and displacing the water side valve portion and the hot water side valve portion in the radial direction. A seesaw type valve body that changes the opening degree in a reverse relationship with each other, and (a) abuts against one end portion of the valve body in the axial direction, depending on the operation of the operation member. A first advancing / retreating member that is moved back and forth in the axial direction; and (b) a second abutting against the other end portion of the valve body in the axial direction and moving forward and backward in the axial direction and in the same direction as the first advancing / retreating member. An advancing / retracting member, (c) a spring for urging the second advancing / retreating member toward the other end portion of the valve body, and (d) between the first advancing / retreating member and the one end portion of the valve body, And the second advancing / retreating member and the other end of the valve body, respectively, and the advancing / retreating movements of the first advancing / retreating member and the second advancing / retreating member are converted into the swing motion of the valve body. And a cam mechanism, and the valve body is oscillated by the cam action of the cam mechanism in accordance with the operation of the operation member to change the mixing ratio of hot water and water.

  According to a second aspect of the present invention, in the first aspect, the cam mechanism is configured such that the water side valve portion and the hot water side valve portion have a diameter larger than the axial movement stroke of the first advance / retreat member and the second advance / retreat member. It is characterized by being displaced in the direction.

  According to a third aspect of the present invention, in any one of the first and second aspects, the cam mechanism is formed on a contact side of the first and second advancing / retreating members with respect to the one end portion and the other end portion of the valve body. And a follower provided at the one end and the other end of the corresponding valve body.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the second advancing / retreating member reduces a valve opening degree of the hot water side valve portion by a forward movement toward the valve body side, and the water side valve portion And a spring for energizing the second advancing / retreating member in the forward direction to increase and change the energizing force in response to an increase in the mixed water temperature, On the other hand, the first advancing / retracting member increases the valve opening degree of the hot water side valve portion and decreases the valve opening degree of the water side valve portion by the forward movement toward the valve body side. And a bias spring for urging the first advancing / retreating member in the advancing direction is provided, and the mixed water temperature is set to a set temperature by operating the valve body by increasing / decreasing the urging force based on temperature sensing of the temperature sensing spring. It is characterized by having an automatic temperature control function that automatically adjusts.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the bias spring is interposed between the driving member that moves forward and backward in the axial direction in the valve case according to the operation of the operating member, and the first forward / backward member. It is characterized by being allowed.

  According to a sixth aspect of the present invention, in any one of the fourth and fifth aspects, an inner support portion and an outer support portion that support the valve body in a swingable manner are provided on the inner side and the outer side in the radial direction of the valve body. A central axis is provided at a central portion in the radial direction of the valve case, and the central axis and the inner support portion are coupled so as to move integrally in the axial direction. By the relative movement in the axial direction of the inner support portion with respect to the outer support portion due to the axial movement of the valve body, the valve body is directly and forcibly not passed through the first and second advancing and retracting members. It is characterized in that it can be opened and closed with a supporting part as a fulcrum.

  According to a seventh aspect of the present invention, in the sixth aspect, a buffer spring is interposed on a transmission path of the driving force to the central shaft, and the driving force is transmitted to the central shaft via the buffer spring. It is characterized by that.

Effects and effects of the invention

  As described above, the present invention oscillates the valve body in the hot and cold water mixing valve in the radial direction with the portion between the water side valve portion and the hot water side valve portion as a fulcrum. A seesaw-type valve element that changes the valve opening in the radial direction and in the opposite relation to each other is formed, abuts against one end of the valve element in the axial direction, and moves forward and backward in the axial direction according to the operation of the operation member. A first advancing / retreating member, a second advancing / retreating member that abuts the other axial end of the valve body and moves in the axial direction and in the same manner as the first advancing / retreating member; And a cam mechanism for converting the forward / backward movement of the first forward / backward member and the second forward / backward member into the swinging motion of the valve body.

In the hot and cold water mixing valve of the present invention, when the first advance / retreat member is moved forward and backward in the axial direction by operation of the operation member, the valve body is moved in the same direction as the second advance / retreat member, and the valve body is moved to the water side valve portion and the hot water side. Oscillating motion is performed with the portion between the valve portion as a fulcrum, and the water-side valve portion and the hot water-side valve portion are displaced in the radial direction, and their valve opening degrees are changed in magnitude in reverse relation to each other.
Thereby, the water inflow amount and the hot water inflow amount through the water inflow passage and the hot water inflow passage are changed, and the temperature of the mixed water is adjusted.
In this hot water / water mixing valve, when the first advancing / retracting member moves forward, the second advancing / retreating member moves in the reverse direction against the biasing force of the spring, and when the second advancing / retreating member moves forward, the first advancing / retracting member moves backward. Moving.
During the movement, the valve body swings by a cam action by the cam mechanism.
Further, in the present invention, by changing the shape of the cam surface of the cam mechanism, the ratio of the axial movement stroke of the first and second advancing / retracting members to the radial opening / closing stroke of the water side valve portion and the hot water side valve portion can be obtained. Various changes can be made.

The hot and cold water mixing valve of the present invention does not open and close by moving the valve body in the axial direction, unlike the conventional hot and cold water mixing valve represented by the hot and cold water mixing valve shown in FIG. 2 Advancing and retreating movement of the advancing / retreating member in the axial direction is performed by a cam action by the cam mechanism to displace the water side valve part and the hot water side valve part in the radial direction, and the stroke is larger than the axial movement stroke of the advancing / retreating member. Thus, the water side valve portion and the hot water side valve portion can be opened and closed in the radial direction (claim 2).
Therefore, according to the present invention, it is possible to ensure a large passage area of the water inflow passage and the hot water inflow passage, and to discharge the mixed water at a large flow rate.

  Further, since a rotary arm that rotates in a radial direction and rotates like the hot water mixing valve shown in Patent Document 2 is not required, the passage area of the water inflow passage and the hot water inflow passage is further increased. Therefore, it is possible to ensure large water discharge without enlarging the diameter of the passage opening on the outer surface of the valve case or enlarging the diameter of the valve body, preventing the hot and cold water mixing valve from becoming large in the radial direction. The hot and cold water mixing valve can be made compact.

The present invention can be applied not only to a hot and cold water mixing valve with an automatic temperature control function but also to a normal mixing type hot water and water mixing valve that does not have an automatic temperature control function.
In this case, the spring that biases the second advance / retreat member serves to move the second advance / retreat member forward and backward in the same direction following the advance / retreat movement of the first advance / retreat member.

In the present invention, the cam mechanism is formed on the side of the first and second advancing / retracting members that are in contact with the one end and the other end of the valve body, and the one end and the other end of the corresponding valve body. It can comprise with the provided driven part (Claim 3).
In this case, the follower can also be a cam surface.

Next, a fourth aspect of the present invention is a hot water / water mixing valve configured as a hot water / water mixing valve with an automatic temperature control function.
Specifically, in claim 4, the second advancing / retracting member is configured to reduce the valve opening degree of the hot water side valve part and increase the valve opening degree of the water side valve part by moving forward to the valve body side. The spring that urges the second advancing / retreating member in the forward direction is a temperature-sensitive spring that increases and changes the urging force in response to an increase in the temperature of the mixed water, while the first advancing / retreating member is advanced to the valve body side. By moving, the valve opening of the hot water side valve portion is increased and the valve opening of the water side valve portion is decreased, and a bias spring is provided to bias the first advance / retreat member in the forward direction. In this hot water / water mixing valve, the valve body swings by increasing / decreasing the urging force based on the temperature sensing of the temperature sensing spring, and the temperature of the mixed water is automatically adjusted to the set temperature.

In the hot and cold water mixing valve according to the fourth aspect, the discharge water flow rate of the mixed water can be increased without particularly increasing the expansion / contraction stroke by the temperature sensing of the temperature sensing spring.
Accordingly, the temperature-sensitive spring is lengthened in the axial direction, thereby increasing the expansion / contraction stroke of the temperature-sensitive spring, so that the hot water / mixing valve is not enlarged in the axial direction. It can be configured in a small size.
Moreover, since it is not necessary to lengthen an expensive temperature-sensitive spring in the axial direction, the cost required for the temperature-sensitive spring can be maintained at a low cost.

Further, the hot water / water mixing valve with automatic temperature control function according to the fourth aspect of the present invention requires a small number of parts, so that the parts cost and assembly cost can be reduced, and the automatic temperature control mechanism can be configured with a small number of parts. The stability and reliability of the temperature control operation can be improved.
Here, the bias spring can be interposed between the drive member that moves forward and backward in the axial direction in the valve case in accordance with the operation of the operation member and the first advance / retreat member. .

  Next, a sixth aspect of the invention provides an inner support portion and an outer support portion that support the valve body in a swingable manner on the inner side and the outer side in the radial direction of the valve body, and a central axis at the center portion of the valve case. And connecting the central shaft and the inner support portion so as to move integrally in the axial direction, and the valve body is moved by the relative movement in the axial direction relative to the outer support portion of the inner support portion by the axial movement of the central shaft. The first and second advancing / retracting members are directly and forcibly opened and closed with the support portion by the outer support portion as a fulcrum.

According to the sixth aspect, the seesaw type valve element can be reliably opened and closed by the axial movement of the central axis regardless of the expansion / contraction stroke of the temperature-sensitive spring.
Therefore, when it is desired to fully open the water side valve portion, this can be easily performed by moving the central axis in the axial direction. Alternatively, in some cases, it is possible to force the hot water side valve portion to fully open.

In this case, a buffer spring can be interposed on the transmission path of the driving force to the central axis, and the driving force can be transmitted to the central axis via the buffer spring. .
In this way, for example, even when an excessive operating force is continuously applied after the hot water side valve portion is fully closed and the water side valve portion is fully open, the excessive operating force is applied to the buffer spring. Therefore, it is possible to prevent the valve body or the peripheral portion from being damaged by such an excessive operating force.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, 10 is a hot water / water mixing valve with an automatic temperature control function (thermostat type) according to the present embodiment, and 12 is a cylindrical valve case.
The valve case 12 is provided with a hot water inflow passage 14 and a water inflow passage 16 that are spaced apart in the axial direction. Here, the hot water inflow passage 14 and the water inflow passage 16 are each provided in a form penetrating the valve case 12 in the radial direction.

The hot water and water flowing in from the hot water inflow passage 14 and the water inflow passage 16 are mixed in the mixing chamber 18 and flow out from the outlet 20 toward the water discharge portion.
In the mixing chamber 18, a temperature-sensitive spring 22 made of a shape memory alloy coil spring is provided, and the biasing force of the temperature-sensitive spring 22 is applied to a pair of upper and lower valve bodies 24 in the drawing. It extends rightward in the figure through a second cam member 46 as a two-way retracting member.

Each of the pair of upper and lower valve bodies 24 is a seesaw type valve body that oscillates in the radial direction. As shown in FIGS. 2 and 4, the hot water side valve portion 26 is on the right side in the figure, and the left side in the figure is the left side. The water side valve part 28 has the rotation part 30 in the intermediate part between them.
Each valve body 24 is swung as a whole with the rotational movement of the rotating portion 30.

As shown in FIG. 2, each of the hot water side valve portion 26 and the water side valve portion 28 has a substantially semicircular shape, and the radially outer surface has a bulging seal portion 32- 1,32-2 and 32-3 corners are provided.
Here, each of the seal portions 32-1, 32-2, and 32-3 bulges in a circular arc shape in cross section.

A fitting groove 34 is formed on the radially outer surface side of the rotating portion 30. The fitting groove 34 has a partially circular shape (here, a semicircular shape) along the axial direction of the groove bottom surface.
On the other hand, as shown in FIG. 4, a fitting protrusion 36 is provided on the radially inner portion of the rotating portion 30. The fitting protrusion 36 has a partial circular shape (here, a substantially semicircular shape) along its axial direction.

As shown in FIGS. 3 and 4, the valve case 12 is integrally formed with an outer support portion 38 that supports the valve body 24 on the outer side in the radial direction.
As shown in FIG. 3, the outer support portion 38 has a shape projecting radially inward, and the tip portion thereof is fitted into the fitting groove 34 of the rotating portion 30 in the valve body 24. The projecting portion 39 is used.
The outer surface of the fitting protrusion 39 has a partial circular shape along the axial direction (here, a substantially semicircular shape corresponding to the shape of the groove bottom surface of the fitting groove 34).

2 and 4, reference numeral 40 denotes a support member that supports the rotating portion 30 of the valve body 24 on the inside in the radial direction, and has a substantially cylindrical shape as shown in FIG. 2.
The support member 40 is provided with an inner support portion 41 at an upper portion and a lower portion in the drawing. A fitting groove 42 is formed in each of the inner support portions 41.
Here, each fitting groove 42 has a partial circular shape in which the groove bottom surface corresponds to the outer surface shape of the fitting protrusion 36 of the rotating portion 30, and here has a substantially semicircular shape.

The inner support portions 41 are fitted with the fitting protrusions 36 of the rotating portion 30 to support the rotating portion 30 in a rotatable manner in cooperation with the outer support portion 38.
In other words, each valve body 24 is supported so as to be swingable in the radial direction along with the rotational movement of the rotating portion 30.

As shown in FIG. 1, on the right side of the valve body 24 in the drawing, the valve body 24 abuts on the right end of the valve body 24 and keeps the contacted state so that the valve body 24 advances and retracts in the left-right direction, that is, the axial direction of the valve case 12. A first cam member 44 is provided as a moving first advance / retreat member.
Further, on the left side of the valve body 24 in the figure, a second cam member 46 is provided as a second advancing / retreating member that abuts the left end portion of the valve body 24 and moves in the left-right direction in the figure while maintaining the contact state. ing.
The biasing force of the temperature sensitive spring 22 acts on the valve body 24 via the second cam member 46.

Here, the first cam member 44 and the second cam member 46 as the advance and retreat members respectively advance and retreat in the same axial direction.
Specifically, when the first cam member 44 moves forward in the left direction in the drawing, the second cam member 46 moves backward in the left direction in the drawing, and the second cam member 46 moves forward in the right direction in the drawing. When doing so, the first cam member 44 moves backward in the right direction in the figure.
Here, each of the cam members 44 and 46 has a substantially disk shape as shown in FIG.

These cam members 44 and 46 are members that cause the valve body 24 to swing by a cam action as the shaft advances and retreats. The cam surface 48 has a concave surface on the contact side surface with the valve body 24. It is said that.
Specifically, the first cam member 44 has a concave cam surface 48 on the left side in the drawing that contacts the right end of the valve body 24 in the drawing, and the second cam member 46 has a left end in the drawing of the valve body 24 in the drawing. The right surface that contacts the part is a cam surface 48 having a concave shape.

In this case, the bulge-shaped seal portion 32-1 in the valve body 24 functions as a driven portion that follows each cam surface 48.
In this embodiment, the sealing portion 32-1 as a driven portion having a bulging shape is configured to have a driven cam surface.

As shown in FIG. 4, the first cam member 44 is provided with an axially penetrating passage 50 at a radially outer position for allowing hot water flowing through the hot water inflow passage 14 to pass in the right direction in the figure. In addition, an axially penetrating passage 52 is provided at the radially inner position to allow hot water that has passed rightward through the passage 50 to pass to the mixing chamber 18 leftward in the drawing.
Also in the second cam member 46, a passage 54 penetrating in the axial direction for allowing water flowing in from the water inflow passage 16 to pass to the mixing chamber 18 in the left direction in the figure is provided at a radially outer position.

In FIG. 1, reference numeral 55 denotes a rotation operation shaft that is rotated by a handle (not shown), and has a connecting shaft portion 56 having a male serration portion formed on the outer peripheral surface, and the connecting shaft portion 56 rotates integrally with the handle. Linked to the state.
The rotary operation shaft 55 also has a large-diameter cylindrical portion 57 integrally in the valve case 12. A female screw 58 is formed on the inner peripheral surface of the cylindrical portion 57.

Reference numeral 60 denotes a drive member that moves forward and backward in the left-right direction in the drawing by rotating the rotation operation shaft 55 and has a stepped cylindrical shape.
A male screw 62 is provided on the outer peripheral surface of the drive member 60, and the male screw 62 is screwed into a female screw 58 of the cylindrical portion 57 of the rotation operation shaft 55.

The drive member 60 also has an engaging protrusion 64 on the outer peripheral surface of the large diameter portion, and the engaging protrusion 64 engages with an engaging groove 66 formed on the inner peripheral surface of the valve case 12. The drive member 60 is prevented from rotating by the engaging action.
Therefore, when the rotation operation shaft 55 is rotated, the drive member 60 is moved forward and backward in the left-right direction in the drawing by screw feed.

  In FIG. 1, reference numeral 68 denotes a bias spring made of a normal metal (steel) coil spring. In the figure, the left end is a first cam member 44 and the right end is a spring receiver 70 that forms an inward flange shape of the drive member 60. The biasing force is exerted on the valve body 24 via the first cam member 44 in the left direction in the figure, that is, in the direction opposite to the biasing direction of the temperature sensitive spring 22.

Reference numeral 72 denotes a central shaft disposed at the central portion of the valve case 12, which is fastened to the support member 40 by a bolt 74, and the support member 40 (that is, the inner support portion 41) moves in the axial direction integrally with the central shaft 72. It is supposed to be.
Specifically, the support member 40 is integrally moved in the right direction in the drawing by the movement of the central shaft 72 in the right direction in the drawing.

A large-diameter head 76 is provided at the right end of the central shaft 72 in the drawing. A buffer spring 78 made of a coil spring is interposed between the head 76 and the spring receiver 70 of the drive member 60.
However, the buffer spring 78 does not act on the head 76 in the normal state.

In this embodiment, when the rotary operation shaft 55 is rotated to the high temperature side, the drive member 60 is moved forward by screw feed in the left direction in the figure.
As a result, the biasing force of the bias spring 68 in the left direction in the figure increases, and the biasing force in the right direction in the figure by the temperature-sensitive spring 22 is overcome. Here, the first cam member 44 is pushed in the left direction in the figure and moves forward. Be made.

Then, as shown in FIG. 5B, the hot water side valve portion 26 of the valve body 24 rotates radially inward with the rotational movement of the rotating portion 30 by the cam action of the cam surface 48 of the first cam member 44. The valve opening is increased by being moved (displaced).
At this time, the second cam member 46 keeps the contact state of the valve body 24 to the left end portion in the figure, and follows the forward movement of the first cam member 44 in the left direction in the figure. It moves backward against the urging force and allows the water side valve portion 28 to rotate outward (displacement) in the radial direction.
As a result, the valve opening degree of the hot water side valve portion 26 increases and the valve opening degree of the water side valve portion 28 decreases.
That is, the temperature of the mixed water is set to the high temperature side by rotating the rotation operation shaft 55 as described above.

On the other hand, when the rotation operation shaft 55 is rotated to the low temperature side in the opposite direction, the drive member 60 is moved backward in the right direction in the drawing, and the biasing force of the bias spring 68 is decreased.
Then, when the urging force of the temperature-sensitive spring 22 is overcome, the second cam member 46 is pushed rightward in the drawing and moves forward.
At this time, as shown in FIG. 5A, the water-side valve portion 28 of the valve body 24 moves inward in the radial direction by the cam action of the cam surface 48 of the second cam member 46 with the rotational movement of the rotating portion 30. It can be rotated.

At that time, the first cam member 44 is moved backward in the right direction in the figure following the forward movement of the second cam member 46 while bending the bias spring 68, and the hot water side valve portion 26 is rotated outward in the radial direction. Is acceptable.
As a result, the valve opening degree of the water side valve part 28 increases and changes, and the valve opening degree of the hot water side valve part 26 decreases and the mixed water temperature is set to the low temperature side.

In the hot water / water mixing valve 10 of this embodiment, when the temperature of the mixed water in the mixing chamber 18 changes to the higher temperature side with respect to the set temperature under the state where the mixed water temperature is set as described above, The urging force is increased and the second cam member 46 is slightly moved rightward in the drawing, and the valve body 24 is operated in a direction to open the water side valve portion 28 and close the hot water side valve portion 26.
As a result, the inflow amount of water from the water inflow passage 16 is large, the inflow amount of hot water from the hot water inflow passage 14 is changed to be small, the mixed water temperature is lowered, and the mixed water temperature is automatically adjusted to the set temperature. Is done.

  Conversely, when the mixed water temperature changes to a lower temperature side than the set temperature, the urging force of the temperature-sensitive spring 22 decreases, so that the valve body 24 closes the water side valve portion 28 and the hot water side valve. It operates in the direction to open the section 26, and decreases the water inflow amount from the water inflow passage 16, while increasing the hot water inflow amount from the hot water inflow passage 14 to automatically adjust the mixed water temperature to the set temperature.

In the present embodiment, the cam shape of the cam surface 48 is larger in the opening / closing stroke in the radial direction of the hot water side valve portion 26 and the water side valve portion 28 than in the axial movement of the cam members 44, 46. It is prescribed as follows.
FIG. 6 shows this clearly.

FIG. 6A shows a state in which both the hot water side valve portion 26 and the water side valve portion 28 have the same valve opening.
At this time, a gap between the inner surface of the valve case 12 serving as the valve seat surface of each of the hot water side valve portion 26 and the hot water side valve portion 28 and the hot water side valve portion 26 and the water side valve portion 28, specifically, the seal portion 32. The gap between -1 is 0.8 mm.

Under this condition, when the temperature of the mixed water rises, the temperature-sensitive spring 22 extends to increase the urging force, and when the second cam member 46 is pushed rightward in the drawing by 0.49 mm in the forward direction, the water side The moving stroke in the radial direction of the valve portion 28 is 0.79 mm.
This numerical value specifically shows the experimental result.
At this time, the hot water side valve portion 26 moves in the radial direction by the same stroke.
In other words, in this embodiment, when the temperature-sensitive spring 22 is extended, the water-side valve portion 28 and the hot water-side valve portion 26 are rotated in the radial direction in a reverse relationship with each other with a stroke larger than the extension stroke. Change the opening.

  The numerical values shown in FIG. 6 are merely examples, and the extension stroke of the temperature-sensitive spring 22, that is, the movement stroke in the axial direction of the second cam member 46 and the radial direction of each of the hot water side valve portion 28 and the water side valve portion 26. The ratio of the stroke of the opening / closing movement can be changed variously by changing the cam shape of the cam surface 48.

  The above is a description of changes in the opening and closing strokes in the radial direction of the hot water side valve portion 28 and the water side valve portion 26 when the temperature sensitive spring 22 changes due to temperature rise. When the first cam member 44 is moved back and forth in the left-right direction in the figure, the valve body 24 swings with the rotational motion of the rotating portion 30 in exactly the same relationship, and the hot water side valve portion 28, water The valve opening degree of the side valve part 26 is changed.

Therefore, in this embodiment, the valve opening degree of the hot water side valve portion 26 and the water side valve portion 28 can be greatly changed as compared with the conventional one, and the hot water inflow amount and the water inflow from the hot water inflow passage 14 are accordingly changed. The change in the flow rate of the water inflow from the passage 16 can be increased, the flow area of the hot water inflow passage 14 and the water inflow passage 16 can be increased, and the temperature of the mixed water can be adjusted while flowing hot water and water at a large flow rate. The temperature can be adjusted.
That is, the flow rate capable of temperature control can be increased, and as a result, the mixed water can be discharged from the discharge portion at a large flow rate.

In this embodiment, as shown in FIG. 7, the rotary operation shaft 55 is fully rotated to the high temperature side, and thereby the drive member 60 is moved forward in the left direction in the figure to open the hot water side valve portion 26 fully. In addition, the valve body 24 can be opened and closed so that the water-side valve portion 28 is fully closed.
That is, it is possible to allow only hot water to flow from the hot water inflow passage 14, to flow out from the outlet 20 as it is, and to discharge water from the water discharge portion.

  On the other hand, even if the rotation operation shaft 55 is greatly rotated to the low temperature side, and the drive member 60 is moved backward in the right direction in the drawing so that the biasing force of the bias spring 68 is reduced, only the biasing force of the temperature-sensitive spring 22 is obtained. The hot water side valve portion 26 may not be fully closed and the water side valve portion 28 may not be fully open.

  Before the hot water side valve portion 26 is fully closed and the water side valve portion 28 is fully opened, the temperature sensing spring 22 is fully extended. Depending on the urging force of the temperature sensing spring 22, the hot water side valve portion 26 is provided. Cannot be fully closed and the water side valve portion 28 cannot be fully opened.

Here, in this embodiment, a central shaft 72 is provided at the central portion, and when the drive member 60 moves backward to the right in the drawing to a certain position as shown in FIG. 72, the force of the backward movement of the driving member 60 in the right direction (driving force) in the figure is transmitted to the central axis 72, and the axis of the central axis 72 in the right direction in the figure is reached. The valve body 24 is forcibly opened and closed until the hot water side valve portion 26 is fully closed and the water side valve portion 28 is fully opened by the direction movement.
At this time, when the central shaft 72 is pulled in the right direction in the drawing, the support member 40 moves in the right direction in the drawing together with the central shaft 72.
That is, the inner support portion 41 provided in the support member 40 moves relative to the outer support portion 38 in the axial direction in the right direction in the drawing.
As a result, the valve body 24 rotates as a whole with the rotation of the rotating portion 38 around the support portion by the outer support portion 38, the hot water side valve portion 26 is fully closed, and the water side valve portion 24 is fully open. And

At this time, even after the hot water side valve portion 26 is fully closed and the water side valve portion 28 is fully opened, the rotational operation force may be continuously applied to the rotational operation shaft 55. Absorbs excessive operating force by bending.
Therefore, it is possible to effectively prevent the valve body 24 or its peripheral portion from being damaged by the excessive operation force.

When the rotary operation shaft 55 is fully rotated to the high temperature side and the water side valve portion 28 is fully closed during the operation, the subsequent operation force is improved by the bias spring 68 being bent. Absorbed.
Therefore, even if an excessive operation force is applied during the operation for fully closing the water side valve portion 28 and the hot water side valve portion 26, the valve body 24 or the peripheral portion is damaged by the excessive operation force. Is effectively prevented.

Such a hot and cold water mixing valve 10 of this embodiment is not the one that opens and closes the valve body by moving the valve body in the axial direction, unlike the conventional hot water and water mixing valve represented by the hot and cold water mixing valve 200 shown in FIG. The axial movement of the cam member 44 and the second cam member 46 is caused to open and close by radially displacing the water side valve portion 28 and the hot water side valve portion 26 by the cam action of the cam mechanism. The water side valve portion 28 and the hot water side valve portion 26 can be opened and closed in the radial direction with a stroke larger than the axial movement stroke 46.
Therefore, according to this embodiment, it is possible to ensure a large passage area of the water inflow passage 16 and the hot water inflow passage 14 and to discharge the mixed water at a large flow rate.

  Further, since a rotary arm that rotates in a radial direction and rotates like the hot water / water mixing valve shown in Patent Document 2 is not required, the passage area of the water inflow passage 16 and the hot water inflow passage 14 is further increased. Therefore, the hot water mixing valve 10 is enlarged in the radial direction because a large flow rate water discharge can be secured without increasing the diameter of the passage opening on the outer surface of the valve case 12 or increasing the diameter of the valve body 24. It is possible to prevent the hot water and water mixing valve 10 from being made small.

Moreover, in this embodiment, even if it does not make the stroke of the expansion-contraction by the temperature sensing of the temperature sensing spring 22 especially large stroke, the discharged water flow rate of mixed water can be enlarged.
Accordingly, the temperature-sensitive spring 22 is lengthened in the axial direction, and thereby the expansion / contraction stroke of the temperature-sensitive spring 22 is increased, so that there is no problem that the hot-water mixing valve 10 is enlarged in the axial direction. Even in the axial direction, it can be made compact.
Moreover, since the expensive temperature-sensitive spring 22 does not have to be elongated in the axial direction, the cost required for the temperature-sensitive spring 22 can be maintained at a low cost.

  Furthermore, in the hot and cold water mixing valve 10 of this embodiment, the required number of parts can be reduced, so that the parts cost and assembly cost can be reduced, and the automatic temperature control mechanism can be configured with a small number of parts. Stability and reliability can be improved.

In the present embodiment, an inner support portion 41 and an outer support portion 38 that support the valve body 24 in a swingable manner are provided on the inner side and the outer side in the radial direction of the valve body 24, respectively, and at the center of the valve case 12. A shaft 72 is provided, and the central shaft 72 and the inner support portion 41 are connected in a state of moving integrally in the axial direction, and the inner support portion 41 is moved in the axial direction relative to the outer support portion 37 by the axial movement of the central shaft 72. By the relative movement, the valve body 24 is directly and forcibly opened and closed with the support portion by the outer support portion 38 as a fulcrum without passing through the first and second cam members 44 and 46. According to the embodiment, the seesaw type valve element 24 can be reliably opened and closed by the axial movement of the central shaft 72 regardless of the expansion / contraction stroke of the temperature-sensitive spring 22.
Therefore, when it is desired to fully open the water side valve portion, this can be easily performed by moving the central shaft 72 in the axial direction.

  Furthermore, since the buffer spring 78 is interposed between the drive member 60 and the center shaft 72 on the transmission path of the drive force of the center shaft 72, excessive operation force is satisfactorily improved by the buffer spring 78. It can absorb, and it can prevent that the valve body 24 thru | or a peripheral part are damaged by an excessive operation force.

In the above embodiment, the cam surface 48 of the cam members 44 and 46 is a concave surface. However, as shown in FIG. 9, the cam surface 48 may be formed as a convex surface.
However, in the embodiment of FIG. 9, the positional relationship between the hot water inflow passage 14 and the water inflow passage 16 is opposite to that in the above embodiment with the cam surface 48 being changed from a concave surface to a convex surface.
Correspondingly, the positional relationship between the hot water side valve portion 26 and the water side valve portion 28 is also opposite to the left and right.
Other configurations are basically the same as those in the above embodiment.
Although the central shaft 72 is not shown in this embodiment, a mechanism for forcibly opening and closing the central shaft 72 and the valve body 24 by the central shaft 72 can be provided as necessary.
However, in the illustrated example, the water side valve portion 28 is fully opened by pushing the support member 40 leftward in the drawing with the central axis.

Each numerical value in FIG. 9 shows an example of the relationship between the extension amount of the temperature-sensitive spring 22 and the opening / closing stroke of the valve body 24 in the radial direction.
That is, a numerical value of 0.5 in the figure indicates the extension amount of the temperature-sensitive spring 22, and a numerical value of 0.8 indicates that the hot water side valve portion 26 and the water side valve portion 28 are opened at the same valve opening. The numerical value of the clearance between the inner surface of the valve case and the numerical value of 0.81 represent the stroke of change in the valve opening of the water side valve portion 28 when the temperature-sensitive spring 22 is extended by 0.5 mm. .
Moreover, the numerical value of 1.61 represents the stroke of the opening direction from the fully closed state of the water side valve part 28 as a result.
Even when the cam surface 48 is convex as described above, the valve body 24 can be opened and closed in the radial direction with a stroke larger than the expansion / contraction stroke of the temperature-sensitive spring 22.

Although the example of FIG. 9 is an example in which the cam surface 48 is a convex surface, the cam surface 48 may be an inclined surface in some cases.
Furthermore, although the said embodiment is an example of the hot water mixing valve with an automatic temperature control function, this invention can also be applied to the usual so-called mixing type hot water mixing valve which does not have such an automatic temperature control function. .

  For example, by configuring the temperature-sensitive spring 22 as a normal steel spring in the embodiment of FIG. 1, this can be a mixing type hot and cold water mixing valve. At this time, the forward drive force by the drive member 60 can be directly applied to the cam member 44.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the above embodiment, a pair of upper and lower valve bodies are provided and opened and closed in the radial direction. However, in some cases, three or more valve bodies may be opened and closed simultaneously. However, conversely, it is also possible to mix hot and cold water by opening and closing only a single valve body, and the present invention is configured in various modifications without departing from the spirit thereof. Is possible.

It is sectional drawing which shows the hot / cold water mixing valve of one Embodiment of this invention. It is a disassembled perspective view of the principal part of the hot water mixing valve of FIG. It is a principal part cross-sectional perspective view of the valve case of the hot water mixing valve of FIG. It is sectional drawing which expanded and showed the principal part of the hot water mixing valve of FIG. It is action | operation explanatory drawing of the hot water mixing valve of FIG. It is explanatory drawing which shows the opening-and-closing stroke at the time of the valve body effect | action of the hot water mixing valve of FIG. It is action explanatory drawing at the time of operating to the high temperature side in the hot water mixing valve of FIG. It is action explanatory drawing at the time of operating to the low temperature side in the hot water mixing valve of FIG. It is a figure of other embodiment of this invention. It is a figure which shows an example of the conventional hot water mixing valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hot water mixing valve 12 Valve case 14 Hot water inflow path 16 Water inflow path 22 Temperature sensing spring 24 Valve body 26 Hot water side valve part 28 Water side valve part 32-1 Seal part (driven part)
38 outer support part 39 fitting protrusion 41 inner support part 44 first cam member (first advance / retreat member)
46 Second cam member (second advance / retreat member)
48 Cam surface 60 Drive member 68 Bias spring 72 Center shaft 78 Buffer spring

Claims (7)

(B) a cylindrical valve case; (b) a water inflow passage and a hot water inflow passage provided in the valve case in an axially spaced manner; and (c) a water side valve portion and a hot water side valve portion. A valve body for changing the valve opening degree of the water side valve portion and the hot water side valve portion in opposite relations to change the inflow amount of water and hot water from the water inflow passage and the hot water inflow passage. A hot water mixing valve that mixes water and hot water while changing the temperature of the mixed water by operating the valve body in accordance with the operation of the operation member, and the water side valve portion and the hot water side valve portion. Oscillates in the radial direction of the valve case with a portion between and as a fulcrum, and displaces the water-side valve portion and the hot-water side valve portion in the radial direction, thereby changing the respective valve opening degrees in a reverse relationship. Along with seesaw-type disc
(a) a first advancing / retreating member that abuts on one end of the valve body in the axial direction and is moved back and forth in the axial direction according to the operation of the operating member;
(b) a second advancing / retreating member that abuts the other end of the valve body in the axial direction and moves forward and backward in the axial direction and in the same direction as the first advancing / retreating member;
(c) a spring that biases the second advance / retreat member toward the other end of the valve body;
(d) The first advancing / retracting member and the one end portion of the valve body, and the second advancing / retreating member and the other end portion of the valve body are provided across the first advancing / retreating member. And a cam mechanism for converting the advance / retreat movement of the second advance / retreat member into the swinging motion of the valve body;
The hot water mixing valve is characterized in that the mixing ratio of hot water is changed by swinging the valve body by the cam action of the cam mechanism in accordance with the operation of the operating member.   2. The cam mechanism according to claim 1, wherein the cam mechanism displaces the water side valve portion and the hot water side valve portion in a radial direction with a stroke larger than an axial movement stroke of the first advance / retreat member and the second advance / retreat member. A hot and cold water mixing valve.   3. The cam mechanism according to claim 1, wherein the cam mechanism corresponds to a cam surface formed on a contact side of the valve body of the first and second advance / retreat members with the one end portion and the other end portion. A hot and cold water mixing valve characterized by comprising a follower provided at the one end and the other end of the valve body. In any one of Claims 1-3, the said 2nd advance / retreat member makes the valve opening degree of the said hot water side valve part small by the advance movement to the said valve body side, and makes the valve opening degree of the said water side valve part large. The spring for urging the second advancing / retreating member in the forward direction is a temperature-sensitive spring that increases and changes the urging force in response to an increase in the mixed water temperature,
On the other hand, the first advancing / retracting member is configured to increase the valve opening of the hot water side valve portion and to decrease the valve opening of the water side valve portion by moving forward to the valve body side, A bias spring for biasing the first advance / retreat member in the forward direction is provided;
A hot and cold water mixing valve having an automatic temperature adjustment function for automatically adjusting a mixed water temperature to a set temperature by operating the valve body by increasing or decreasing an urging force based on temperature sensing of the temperature sensitive spring. .   5. The bias spring according to claim 4, wherein the bias spring is interposed between a driving member that moves forward and backward in the axial direction in the valve case in response to an operation of the operating member and the first advancing and retracting member. Hot water mixing valve. In any one of Claims 4 and 5, an inner support part and an outer support part that support the valve body in a swingable manner are provided on the inner side and the outer side in the radial direction of the valve body,
A central axis is provided at a central portion in the radial direction of the valve case, and the central axis and the inner support portion are connected in a state of integrally moving in the axial direction. By the relative movement in the axial direction of the inner support portion with respect to the outer support portion due to the movement, the valve body directly and forcibly supports the support portion by the outer support portion without passing through the first and second advance / retreat members. A hot and cold mixing valve characterized in that it can be opened and closed as   7. The shock absorber according to claim 6, wherein a buffer spring is interposed on a transmission path of the driving force to the central shaft, and the driving force is transmitted to the central shaft through the buffer spring. A hot and cold water mixing valve.

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