JP6847777B2 - Hot water switching tap - Google Patents

Description

The present invention relates to a hot water switching plug for switching between hot water and water.

Conventionally, a tubular casing having a hot water inlet, a water inlet, and an outflow port, and a control valve body arranged in the casing and capable of selectively closing the hot water inlet and the water inlet are provided, and the control valve body is moved. There is known a hot water switching plug that can switch between hot water and water by allowing it to be switched (see, for example, Patent Document 1).

In Patent Document 1, it is a hot water switching tap for temperature control that is attached to a faucet in a bathroom of a general household, and even if the hot water temperature changes due to a change in water pressure or the like, an urging force is applied according to this temperature change. The temperature-sensitive spring that changes the temperature adjusts the opening degree of the hot water inlet by the control valve body, so that hot water at an appropriate temperature can be discharged from the hot water outlet.

Japanese Unexamined Patent Publication No. 2009-180302

In recent years, with the progress of water heaters in ordinary households, the chances of adjusting the temperature by using the hot water switching tap at the hand of the faucet in the bathroom have decreased, and the number of cases where the temperature is adjusted exclusively by the remote control of the water heater is increasing. ..

In view of the above points, it is an object of the present invention to provide a hot water switching plug capable of reducing the manufacturing cost as compared with the conventional one while maintaining safety.

[1] In order to achieve the above object, the present invention
With a tubular casing (for example, casing 2 of the embodiment; the same applies hereinafter).
A hot water inlet (for example, the hot water inlet 6 of the embodiment; the same shall apply hereinafter) and a water inlet (for example, the water inlet 7 of the embodiment; the same shall apply hereinafter) provided on the peripheral wall of the casing at intervals in the axial direction. .)When,
An outlet provided at the end of the casing on the water inlet side (for example, the outlet 5 of the embodiment; the same shall apply hereinafter).
A water discharge state in which the water is slidably provided in the casing and slides in the casing to close the hot water inlet and open the water inlet to allow water to flow out from the outlet. For example, the water discharge state of the embodiment; the same applies hereinafter) and the hot water discharge state of opening the hot water inlet and blocking the water inlet to allow hot water to flow out from the outlet (for example, the hot water discharge state of the embodiment; the same applies hereinafter). A control valve body that can be switched to any of the states (for example, the control valve body 9 of the embodiment; the same applies hereinafter).
With the hot water switching screw (for example, the hot water switching screw 13 of the embodiment; the same applies hereinafter) which is rotatably arranged at the end on the hot water inlet side in the casing and a part of which is exposed to the outside in the axial direction of the casing. ,
A slider that is screwed into the hot water switching screw and is arranged in the casing in a state where rotation is blocked, and slides in the casing in the axial direction by rotating the hot water switching screw (for example, the slider of the embodiment). 12. The same applies below.)
A temperature-sensitive element (for example, the wax element 10 or the SMA spring of the embodiment; the same applies hereinafter) that is arranged in the casing and expands and contracts in response to a temperature change of hot water flowing in the casing.
The control valve body is a hot water switching plug (for example, the hot water switching plug 1 of the embodiment; the same applies hereinafter) configured to move forward and backward according to the slider that moves forward and backward by the rotation of the hot water switching screw. hand,
A closing mechanism that reduces the amount of hot water flowing out from the outlet when the hot water flowing in the casing reaches a predetermined temperature or higher by utilizing the expansion and contraction of the temperature sensitive element (for example, the closing mechanism 15 of the embodiment; same.) Bei to give a,
The closing mechanism includes a collar member (for example, the collar member 16 of the embodiment; the same applies hereinafter) and an inwardly projecting portion (for example, the annular member 17 of the embodiment) provided on the inner peripheral surface of the casing. The same applies hereinafter.) The collar member is pressed by the stretching of the temperature sensitive element, and the collar member and the overhanging portion overlap each other, thereby reducing the amount of hot water flowing out from the outlet. It is characterized by letting it.

According to the present invention, hot water having a temperature equal to or higher than a predetermined temperature can be produced only by providing a closing mechanism and a temperature sensitive element for operating the closing mechanism in a place where a temperature sensitive element for temperature adjustment of a conventional hot water mixing tap is built. When hot water is discharged, the amount of hot water flowing out from the outlet can be reduced.

Therefore, it is possible to manufacture a hot water switching tap that has a casing of a hot water mixing tap having a high-performance temperature control function and a hot water switching screw as common parts, and it can be assembled to a faucet in a bathroom with high performance. Since it can be assembled in the same way as the hot and cold water mixing tap, it is easy to assemble the hot and cold water switching tap. Therefore, it is possible to provide a hot water switching plug that suppresses the manufacturing cost while maintaining the safety.

Further, in the present invention, the closing mechanism includes a collar member (for example, the collar member 16 of the embodiment; the same applies hereinafter) and an inwardly projecting portion (for example, the same) provided on the inner peripheral surface of the casing. , The annular member 17 of the embodiment; the same applies hereinafter), and the collar member is pressed by the stretching of the temperature sensitive element, and the collar member and the overhanging portion overlap with each other, so that the color member flows out from the outlet. The amount of hot water produced can be reduced.

According to this configuration, when the temperature of the hot water flowing in the casing is equal to or higher than the predetermined temperature, the collar member and the overhanging portion overlap and the amount of hot water flowing out from the outlet is reduced, so that the hot water is hot. It is possible to prevent or suppress the outflow from the outlet, and the safety of the hot water switching plug can be maintained by a simple configuration.

In addition, since the outflow amount of hot water is reduced, it is possible to notify the user that hot water of a predetermined temperature or higher is flowing out due to the decrease in the outflow amount.

[ 2 ] Further, in the present invention, the overhanging portion can be composed of an annular member fixed in the casing (for example, the annular member 17 of the embodiment; the same applies hereinafter).

According to such a configuration, it is not necessary to integrally mold the overhanging portion with the casing. Therefore, the gap between the overhanging portion and the collar member can be adjusted by the annular member, and the manufacturing cost can be suppressed without requiring high-precision molding of the casing.

[ 3 ] Further, in the present invention, it is preferable that the collar member is provided with a guide portion (for example, the pillar portion 16e of the embodiment; the same applies hereinafter) extending toward the inside of the overhanging portion. ..

According to such a configuration, the collar member is housed inside the overhanging portion without being caught by the end portion of the overhanging portion, and the collar member and the overhanging portion can be smoothly overlapped with each other. Further, when the closing mechanism is not in the closed state, a gap is formed between the collar member and the overhanging portion, and a gap through which hot water flows is formed on the outer peripheral side of the collar member. Therefore, the color member tends to wobble. However, if the guide portion extends from the collar member toward the inside of the overhanging portion, the guide portion provided on the collar member is positioned inside the overhanging portion even when the closing mechanism is not in the closed state. It is possible to prevent or suppress the wobbling of the color member.

Further, by providing the guide portion on the collar member, the annular member can be easily assembled to the casing as compared with the case where another guide portion extending from the annular member as the overhanging portion toward the outside of the collar member is provided. As a result, the hot and cold water switching taps as a whole can be easily manufactured.

[ 4 ] Further, in the present invention, at least a part of the closing mechanism is formed by the control valve body, the control valve body is pressed by the extension of the temperature sensitive element, and the hot water flow is caused by the control valve body. The inlet is blocked and the amount of hot water flowing out of the outlet can be reduced.

According to this configuration, since the closing mechanism is configured by using the existing control valve body, it is possible to effectively utilize the existing parts and provide a hot water switching plug that ensures safety at a low cost. In particular, if the closing mechanism is configured using only the existing control valve body, the existing parts can be effectively used without using new additional parts, and the hot water switching plug that ensures safety can be used at a lower cost. Can be provided.

[ 5 ] Further, in the present invention, when the control valve body is pressed by the extension of the temperature sensitive element and the hot water inlet is blocked by the control valve body, the slider is also formed by the control valve body. It is preferable that the hot water switching screw is pushed back and rotated.

According to this configuration, the hot water inlet is blocked by the control valve body due to the extension of the temperature sensitive element, and the hot water switching screw also rotates. Therefore, even if the temperature sensitive element cools and shrinks, the hot water switching screw is switched to the water discharge state in which the hot water inlet is blocked by the control valve body and the water inlet is opened, so that the hot water above the predetermined temperature flows out from the outlet again. It can be prevented from doing so. Further, since the blocking state for preventing the hot water above the predetermined temperature from flowing out from the outlet again can be maintained by the hot water switching screw of the existing component, a mechanism for maintaining the blocking state is separately provided in the hot water switching plug. It is not necessary, and the function of maintaining the blocking state can be provided without increasing the number of parts and the manufacturing cost.

Explanatory drawing which shows the hot water discharge state of the hot water switching plug of 1st Embodiment in a partial cross section. Explanatory drawing which shows the outflow state of the hot water switching tap of 1st Embodiment in a partial cross section. Explanatory drawing which shows the state in which the temperature sensitive element of the hot water switching plug of 1st Embodiment was extended with a partial cross section. The perspective view which shows the hot water discharge state of the hot water switching plug of 1st Embodiment in a partial cross section. It is a perspective view which shows the state in which the temperature sensitive element of the hot water switching plug of 1st Embodiment is extended with a partial cross section. The perspective view which shows the color member of 1st Embodiment. The perspective view which shows the other embodiment of the color member of 1st Embodiment. Explanatory drawing which shows the state in which the temperature sensitive element of the hot water switching plug of 2nd Embodiment is extended in a partial cross section. Explanatory drawing which shows the state in which the temperature sensitive element of the hot water switching plug of 3rd Embodiment is extended with a partial cross section.

An embodiment of the hot water switching plug of the present invention will be described with reference to the figure. FIG. 1 is an explanatory view showing a part of the hot water discharge state of the hot water switching plug of the first embodiment in a cross section. FIG. 2 is an explanatory view showing a partial cross-sectional view of the water discharge state of the hot water switching plug of the first embodiment. FIG. 3 is an explanatory view showing a state in which the temperature sensitive element of the hot water switching plug of the first embodiment is stretched in a partial cross section. FIG. 4 is a perspective view showing a partial cross-sectional view of the hot water discharge state of the hot water switching plug of the first embodiment. FIG. 5 is a perspective view showing a partially stretched state of the temperature sensitive element of the hot water switching plug of the first embodiment in a partial cross section. FIG. 6 is a perspective view showing the color member of the first embodiment. FIG. 7 is a perspective view showing another embodiment of the color member of the first embodiment. FIG. 8 is an explanatory view showing a state in which the temperature sensitive element of the hot water switching plug of the second embodiment is stretched in a partial cross section. FIG. 9 is an explanatory view showing a state in which the temperature sensitive element of the hot water switching plug of the third embodiment is stretched in a partial cross section.

[First Embodiment]
As shown in FIG. 1, the hot water switching plug 1 of the first embodiment includes a cylindrical casing 2 and a control valve mechanism W built in the casing 2.

The casing 2 has a first casing member 3 which is cylindrical and has a male screw portion 3a on the outer periphery of the opening end portion, and a male screw portion 3a of the first casing member 3 which is cylindrical and has a male screw portion 3a on one opening end portion. It is composed of a second casing member 4 having a female screw portion 4a screwed into the inner casing 4a and having an outlet 5 at the other open end portion.

The second casing member 4 has a plurality of hot water inlets 6 which are located on the outflow port 5 side of the female screw portion 4a and are bored in the circumferential direction, and a predetermined distance from the hot water inlet 6. It is provided with a plurality of water inflow ports 7 which are located on the outflow port 5 side and are bored at intervals in the circumferential direction. Further, the first casing member 3 includes a hole 8 formed in the center of the bottom wall.

The second casing member 4 is spaced apart from the outer cylinder portion 4b having the female threaded portion 4a and the open end of the other side (outlet 5 side) opposite to the side on which the female threaded portion 4a is formed in the circumferential direction. It is composed of an inner cylinder portion 4d supported on an inner concentric shaft by a plurality of connecting portions 4c provided. The space defined by the outer cylinder portion 4b, the connecting portion 4c, and the inner cylinder portion 4d serves as an outflow port 5 through which the hot water flowing in from the hot water inlet 6 and the water inlet 7 flows out.

The outlet 5 side of the inner cylinder portion 4d is closed, and the wax element 10 is configured to be received by the closed portion of the inner cylinder portion 4d.

The control valve mechanism W has a control valve body 9 that can selectively block either the hot water inlet 6 or the water inlet 7, and wax as a temperature-sensitive element arranged on the outlet 5 side of the control valve body 9. A bias spring 11 which is arranged between the element 10 and the control valve body 9 and the wax element 10 and urges the control valve body 9 to be separated from the wax element 10 is integrally formed with the control valve body 9. A slider 12 located on the first casing member 3 side of the control valve body 9 is provided.

The temperature sensitive element is not limited to the wax element 10, but any other element as long as it stretches when the temperature of the hot water flowing out from the outlet 5 becomes a predetermined temperature or higher and shrinks when the temperature is lower than the predetermined temperature. You may. For example, the temperature sensitive element may be composed of an SMA (Shape Memory Alloy) spring. As the urging force (elastic force) of the SMA spring changes due to the temperature change of the hot water, the bias spring 11, the return prevention spring 14, and the SMA spring of the hot water switching plug 1 are out of balance, and as a result, the SMA spring expands and contracts. It will be.

Further, in the embodiment, the "predetermined temperature" is a temperature set based on the safety when hot water is used in a bathroom or the like, and in the present embodiment, it is possible to ensure the necessary and sufficient safety. It is set to a temperature that allows it.

A plurality (for example, six) of hot water flow paths 9a having a substantially arcuate cross section penetrating in the axial direction are bored in the control valve body 9 at intervals in the circumferential direction. The hot water flowing in from the hot water inlet 6 flows out from the outflow port 5 through the hot water flow path 9a. Further, on the outer periphery of the control valve body 9, a ridge 9b extending in an annular shape in the circumferential direction is provided. The ridges 9b prevent or suppress the hot water flowing in from the hot water inlet 6 from passing through the outer periphery of the control valve body 9 and the water flowing in from the water inflow port 7 from passing through the outer circumference of the control valve body 9. ing. Further, since the ridge 9b has less frictional resistance than the rubber packing or the like, the control valve body 9 can be smoothly slid in the casing 2.

The wax element 10 is housed in a bottomed tubular wax housing 10a for accommodating wax, a diaphragm and the like (not shown), a guide member 10b crimped and fixed to an opening of the wax housing 10a, and a guide member 10b. It is provided with a guided piston 10c. The guide member 10b includes a hole 10d that allows the tip of the piston 10c to project freely. An annular protrusion 10e that projects outward in the radial direction is provided on the outer periphery of the open end of the wax housing 10a.

In the wax element 10, when the temperature of the hot water flowing in the casing 2 becomes equal to or higher than a predetermined temperature, the wax in the wax housing 10a expands and the diaphragm (not shown) expands, and the piston 10c protrudes from the hole 10d of the guide member 10b. To do. When the temperature of the hot water flowing in the casing 2 becomes lower than a predetermined temperature, the wax in the wax housing 10a contracts, the diaphragm (not shown) returns to its original position, and the piston 10c is housed in the guide member 10b again. In this way, the wax element 10 is configured to expand and contract according to the temperature change of the hot water in the casing 2.

An annular water-side valve seat 7a is provided at the opening edge of the second casing member 4 on the outflow port 5 side at the water inflow port 7 so as to project inward in the radial direction of the second casing member 4. The open end edge of the first casing member 3 on the male screw portion 3a side is the end edge of the second casing member 4 on the side separated from the outlet 5 of the hot water inlet 6 in a state of being screwed to the second casing member 4. It is located and functions as a hot water side valve seat 6a.

The control valve body 9 is slidably arranged in the casing 2 between the hot water side valve seat 6a and the water side valve seat 7a in the axial direction of the casing 2.

By moving in the axial direction, the control valve body 9 abuts on the hot water side valve seat 6a to close the hot water inlet 6 and separates from the water side valve seat 7a to open the water flow inlet 7 (FIG. 2). (See) and the hot water outlet state (see FIG. 1) in which the hot water inlet 6 is opened at a distance from the hot water side valve seat 6a and abuts on the water side valve seat 7a to close the water flow inlet 7. It can be switched.

A plurality of groove portions 12a extending in the axial direction are formed on the outer peripheral surface of the slider 12 at intervals in the circumferential direction, and on the inner peripheral surface of the first casing member 3 in the axial direction corresponding to the groove portions 12a. A plurality of extending ridges 3b are formed. The engagement of the groove portion 12a and the ridge 3b prevents the slider 12 from rotating in the casing 2. Further, a female screw portion 12b is formed on the inner peripheral surface of the slider 12.

Further, in the casing 2, a hot water switching screw 13 is arranged so as to be located between the bottom wall of the first casing member 3 and the slider 12. A hole 8 is provided in the bottom wall of the first casing member 3. The hot water switching screw 13 is exposed from the hole 8 to the outside of the casing 2 and is provided in the axial center of the hot water switching screw 13 and the connecting portion 13a to which the hot water switching dial or the like (not shown) is connected. An annular protrusion 13b that prevents the hot water switching screw 13 from falling out of the hole 8 by engaging with the inner surface of the bottom wall of the first casing member 3 and a female screw portion of the slider 12. It is provided with a male screw portion 13c to be screwed into 12b.

When the hot water switching screw 13 is rotated, the male screw portion 13c of the hot water switching screw 13 rotates, and the slider 12 provided with the female screw portion 12b screwed into the male screw portion 13c is engaged with the groove portion 12a and the ridge 3b. Since it cannot rotate, it slides in the axial direction. As a result, the control valve body 9 integrally formed with the slider 12 can also be moved to an arbitrary position in the axial direction.

The male screw portion 13c of the hot water switching screw 13 and the female screw portion 12b of the slider 12 are configured so that the stroke of the slider 12 becomes large even if the lead is increased and the hot water switching screw 13 is rotated slightly. When the leads of the male screw portion 13c and the female screw portion 12b are increased, the slider 12 moves to the hot water switching screw 13 side due to the urging force or water pressure of the bias spring 11 in a state where the slider 12 is separated from the hot water switching screw 13. There is a risk that the hot water switching screw 13 will slide and rotate. In order to prevent this, a return prevention spring 14 is provided between the annular protrusion 13b of the hot water switching screw 13 and the slider 12 to prevent or suppress the unintended sliding of the slider 12.

The hot water switching plug 1 of the present embodiment includes a closing mechanism 15. The closing mechanism 15 includes a collar member 16 (for example, made of stainless steel or synthetic resin) arranged between the control valve body 9 and the wax element 10 in the casing 2 and an inner peripheral surface of the second casing member 4. An annular member 17 (for example, made of synthetic resin) fixed by being press-fitted into the casing is provided.

As shown in FIG. 6, the collar member 16 includes a cylindrical portion 16a and a closing portion 16b that closes one end of the cylindrical portion 16a. The cylindrical portion 16a is provided with a plurality of rectangular window portions 16c located on the other end side of the opening and having an interval in the circumferential direction. The closed portion 16b is provided with a hole portion 16d. In the collar member 16 of the first embodiment, the pillar portion 16e of the cylindrical portion 16a existing between the window portions 16c in the circumferential direction, and the cylinder located on the other end side of the window portion 16c in the cylindrical portion 16a. The portion 16a guides the movement of the collar member 16 in the axial direction, and corresponds to the guide portion of the present invention.

This guide portion can also be provided on the annular member 17. In this case, a pillar portion extending from the annular member 17 to the outer circumference of the cylindrical portion 16a of the collar member 16 may be provided. However, in the present embodiment, since the annular member 17 is press-fitted into the casing 2, if the annular member 17 is provided with a pillar portion, it is necessary to carefully press-fit the pillar portion while being careful not to break the pillar portion at the time of press-fitting. Yes, it is troublesome to assemble.

Therefore, by configuring the guide portion to be located inside the annular member 17 as in the present embodiment, the annular member 17 can be easily assembled to the casing 2, and the hot water switching plug 1 as a whole can be manufactured. It will be easy.

The wax housing 10a of the wax element 10 is inserted into the hole 16d of the closing portion 16b, and the closing portion 16b of the collar member 16 is locked to the annular protrusion 10e of the wax housing 10a.

The outer diameter of the collar member 16 is set to be smaller than the inner diameter of the annular member 17. One end of the bias spring 11 is received by the annular protrusion 10e of the wax element 10 via the closing portion 16b of the collar member 16.

The shape of the color member 16 is not limited to that of FIG. For example, as in the case of other collar members shown in FIG. 7, a pillar portion 16e extending from the other end of the cylindrical portion 16a toward the inside of the annular member 17 may be provided. The pillar portion 16e corresponds to the guide portion of the present invention. With such a configuration, the annular member 17 having no pillar portion can be easily press-fitted into the casing 2, and the hot water switching plug 1 as a whole can be easily manufactured. Further, the pillar portion 16e may be omitted, and instead of the pillar portion 16e, a guide portion extending from one end of the annular member 17 toward the outside of the cylindrical portion 16a of the collar member 16 may be provided.

Hereinafter, a method of using the hot water switching plug 1 of the first embodiment will be described. First, when only water is used, the control valve body 9 integrally molded with the slider 12 is also on the hot water switching screw 13 side by rotating the hot water switching screw 13 and pulling the slider 12 toward the hot water switching screw 13. Attracted to. As a result, the control valve body 9 comes into contact with the hot water side valve seat 6a to block the hot water inlet 6, and only the water inlet 7 is opened.

When the hot water switching screw 13 is rotated to the opposite side, the water inflow port 7 is blocked by the control valve body 9, and the hot water inlet 6 is opened.

When the temperature of the hot water flowing in the casing 2 becomes equal to or higher than a predetermined temperature, the wax in the wax housing 10a expands, the diaphragm (not shown) expands, and the piston 10c protrudes from the hole 10d of the guide member 10b. As a result, the color member 16 is pressed by the wax element 10, and the color member 16 and the annular member 17 as the overhanging portion overlap each other, and the amount of hot water flowing out from the outflow port 5 is reduced. Therefore, it is possible to prevent or suppress the outflow of high-temperature hot water from the outlet 5, and maintain the safety of the hot water switching tap 1 at the same level as the existing high-performance hot water mixing tap with a simple configuration. Can be done.

Further, when the piston 10c protrudes from the guide member 10b and the wax element 10 is stretched, the control valve body 9 is pressed by the wax element 10 via the bias spring 11, and the hot water inlet 6 is closed by the control valve body 9. The urging force of the bias spring 11 and the return prevention spring 14 is set so as to be such. Then, when the control valve body 9 is pressed toward the hot water inlet 6 side, the hot water switching screw 13 is rotated and returned to the position of the water discharge state.

According to the hot water switching plug 1 of the present embodiment, the closing mechanism 15 and the temperature sensitive element for operating the closing mechanism 15 are provided in the place where the temperature sensing element for temperature adjustment of the conventional hot water mixing tap is built. By simply providing the wax element 10 of the above, the amount of hot water flowing out from the outlet can be reduced when hot water having a temperature equal to or higher than a predetermined temperature is discharged.

Therefore, it is possible to manufacture a hot water switching tap that uses the casing of the existing hot water mixing tap having a high-performance temperature control function and the hot water switching screw as common parts, and the assembly to the faucet in the bathroom is also high. Since it can be assembled in the same manner as the performance hot water mixing tap, the hot water switching tap 1 can be easily assembled. Therefore, it is possible to provide the hot water switching plug 1 while maintaining the safety and suppressing the manufacturing cost.

Further, according to the hot water switching plug 1 of the present embodiment, when the temperature of the hot water flowing in the casing 2 is equal to or higher than a predetermined temperature, the collar member 16 and the annular member 17 as the overhanging portion overlap and the outlet Since the amount of hot water flowing out from 5 is reduced, it is possible to prevent or suppress the outflow of hot water from the outlet 5, and the safety of the hot water switching plug 1 can be improved by the existing high-performance hot water with a simple configuration. It can be maintained at the same level as the mixing tap.

Further, in the hot water switching plug 1, when the outflow of hot water is at a predetermined temperature or higher, the closing mechanism 15 closes and the outflow amount of hot water decreases. It is possible to notify that hot water above the temperature is flowing out.

Further, according to the hot water switching plug 1 of the present embodiment, the portion between the collar member 16 and the window portions 16c as the guide portion in the circumferential direction and the portion on the control valve body 9 side of the window portion 16c are annular members. It extends inward in the radial direction of 17, and this portion guides the collar member 16 so that it can smoothly move inward of the annular member 17. Therefore, the collar member 16 is housed inside the annular member 17 without being caught by the end portion of the annular member 17 as the overhanging portion, and the collar member 16 and the annular member 17 can be smoothly overlapped with each other.

Further, when the closing mechanism 15 is not in the closed state, a gap is formed between the collar member 16 and the annular member 17, and a gap through which hot water flows is formed on the outer peripheral side of the collar member 16. Therefore, the color member 16 tends to wobble. However, if the above-mentioned guide portion extends from the collar member 16 toward the inside of the annular member 17, the guide portion provided on the collar member 16 can be placed inside the annular member 17 even when the closing mechanism 15 is not in the closed state. It can be positioned at, and the wobbling of the color member can be prevented or suppressed. Further, by providing the guide portion on the collar member 16, the annular member 17 having no pillar portion can be easily press-fitted into the casing 2, and the hot water switching plug 1 as a whole can be easily manufactured.

Further, according to the hot water switching plug 1 of the present embodiment, it is not necessary to integrally mold the overhanging portion with the casing 2. Therefore, the gap between the overhanging portion and the collar member 16 can be adjusted by the annular member 17 as the overhanging portion of the present embodiment, and high accuracy is required to appropriately set the gap between the casing 2 and the collar member 16. The manufacturing cost of the hot water switching tap 1 can be suppressed without requiring the molding of the hot water switching tap 1.

Further, according to the hot water switching tap 1 of the present embodiment, since the closing mechanism 15 is configured by using the existing control valve body 9 conventionally used for the high-performance hot water mixing tap, the existing parts are effectively utilized. Therefore, it is possible to provide the hot water switching plug 1 that ensures safety at a low cost.

Further, according to the hot water switching plug 1 of the present embodiment, the hot water inlet 6 is blocked by the control valve body 9 and the hot water switching screw 13 also rotates due to the stretching of the wax element 10 as the temperature sensitive element. Therefore, even if the wax element 10 cools and shrinks, the hot water inlet 6 is closed because the hot water switching screw 13 is switched to the water discharge state in which the hot water inlet 6 is closed and the water inlet 7 is opened by the control valve body 9. It is possible to maintain this state, and it is possible to prevent hot water having a temperature equal to or higher than a predetermined temperature from flowing out from the outflow port 5 again by opening the hot water inlet 6. Further, since the blocking state for preventing the hot water above the predetermined temperature from flowing out from the outlet again can be maintained by the hot water switching screw 13 of the existing component, a mechanism for maintaining the blocking state is separately provided as a hot water switching plug. It is not necessary to provide the function, and the function of maintaining the blocked state can be provided without increasing the number of parts and the manufacturing cost.

In the first embodiment, the closing mechanism 15 including the collar member 16, the annular member 17, and the control valve body 9 has been described. However, the closing mechanism of the present invention does not necessarily have to include the control valve body 9 as a component. For example, the closing mechanism is composed of a collar member 16 and an annular member 17, and is biased so that the control valve body 9 does not block the hot water inlet 6 even when hot water of a predetermined temperature or higher flows out. The elastic force of the spring 11 and the return prevention spring 14 may be set.

On the contrary, the closing mechanism of the present invention does not necessarily have to include the collar member 16 and the annular member 17 as constituent elements. For example, the closing mechanism is composed of a control valve body 9, and when hot water of a predetermined temperature or higher is flowing out, the control valve body 9 closes the hot water inlet 6, so that hot water is discharged from the hot water outlet 5. It may be prevented from spilling from and the safety may be maintained.

Further, in the first embodiment, as the overhanging portion of the present invention, the second casing member 4 and the annular member 17 which is a separate body are fixed, and the second casing member 4 is raised in accordance with the outer diameter of the collar member 16. Although it has been described that it is not necessary to mold with precision, the overhanging portion of the present invention is not limited to this. For example, the overhanging portion may be integrally formed with the second casing member 4.

[Second Embodiment]
The hot water switching plug 1 of the second embodiment will be described with reference to FIG. The same configurations as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. The hot water switching plug 1 of the second embodiment does not include a collar member and an annular member, and the temperature of the hot water flowing in the casing 2 becomes equal to or higher than a predetermined temperature, the wax element 10 projects the piston 10c, and the whole is axially oriented. When extended, the wax casing 10a presses the control valve body 9 in a direction that closes the hot water inlet 6. Therefore, the closing mechanism 15 of the second embodiment is only the control valve body 9. Other configurations of the second embodiment are the same as those of the first embodiment.

Similarly to the first embodiment, the hot water switching plug 1 of the second embodiment also operates the control valve body 9 as a closing mechanism at a place where the temperature sensing element for temperature adjustment of the conventional hot water mixing tap is built. When hot water of a predetermined temperature or higher flows through the casing 2, the hot water inlet 6 is blocked by the control valve body 9 and flows out from the outlet 5 only by providing the wax element 10 as a temperature sensitive element. The amount of can be reduced. Therefore, according to the hot water switching plug 1 of the second embodiment, the temperature of the hot water flowing out from the outflow port 5 can be suppressed to less than a predetermined temperature by increasing the amount of water flowing out from the outflow port 5.

In addition, it is possible to manufacture hot water switching taps that use the casing of hot water mixing taps with high-performance temperature control functions and hot water switching screws as common parts, and the assembly to the faucets in the bathroom is also high-performance. Since it can be assembled in the same way as the hot and cold water mixing tap, it is easy to assemble the hot and cold water switching tap. Therefore, it is possible to provide a hot water switching plug that suppresses the manufacturing cost while maintaining the safety.

Further, according to the hot water switching plug 1 of the present embodiment, since the closing mechanism 15 is configured by using the existing control valve body 9, the existing parts do not use new additional parts such as the collar member and the annular member. It is possible to provide a hot water switching plug 1 that ensures safety at a low cost by effectively utilizing the above.

Further, according to the hot water switching plug 1 of the present embodiment, the hot water switching screw 13 rotates while the hot water inlet is blocked by the control valve body due to the stretching of the wax element 10. Therefore, even if the wax element 10 cools and shrinks, the hot water switching screw 13 is switched to a water discharge state in which the hot water inlet 6 is closed by the control valve body 9 and the water inlet is opened, so that hot water of a predetermined temperature or higher flows again. It is possible to prevent the outflow from the outlet. Further, since the blocking state for preventing the hot water above the predetermined temperature from flowing out from the outlet 5 again can be maintained by the hot water switching screw of the existing component, a mechanism for maintaining the blocking state is separately provided for the hot water switching plug 1 It is not necessary to provide the function of maintaining the blocking state without increasing the number of parts and the manufacturing cost.

[Third Embodiment]
The hot water switching plug 1 of the third embodiment will be described with reference to FIG. The same configurations as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Similar to the second embodiment, the hot water switching plug 1 of the third embodiment has only the control valve body 9 as the closing mechanism 15, but the wax element 10 does not come into direct contact with the control valve body 9 and is a bias spring. It is configured to press the control valve body 9 via the 11. Further, the control valve body 9 of the third embodiment is not integrally molded with the slider 12 as in the first embodiment and the second embodiment, but is configured as a separate body, and the control valve body 9 and the slider 12 are formed separately. A bias spring 18 is arranged between the two. In the third embodiment, the slider 12 presses the control valve body 9 via the bias spring 18.

According to the hot water switching plug 1 of the present embodiment, a wax element for moving the control valve body 9 to the hot water inlet 6 closed side at a place where the temperature sensing element for temperature adjustment of the conventional hot water mixing tap is built. Only by providing 10, the amount of hot water flowing out from the outflow port 5 can be reduced by closing the hot water inlet 6 when hot water having a temperature equal to or higher than a predetermined temperature is discharged. As a result, the amount of hot water supplied from the hot water inlet 6 into the casing 2 decreases, the flow rate of the water flowing in from the water inlet 7 increases, and the temperature of the hot water flowing out from the outflow port 5 becomes lower than the predetermined temperature. It can be lowered and safety can be ensured.

In addition, it is possible to manufacture a hot water switching tap 1 that has a casing of a hot water mixing tap having a high-performance temperature control function and a hot water switching screw as common parts, and it can be assembled to a faucet in a bathroom with conventional high performance. Since it can be assembled in the same way as the hot and cold water mixing tap, it is easy to assemble the hot and cold water switching tap. Therefore, it is possible to provide a hot water switching plug that suppresses the manufacturing cost while maintaining the safety.

Further, according to the hot water switching tap 1 of the present embodiment, since the closing mechanism 15 is configured by using the existing control valve body used in the high-performance hot water mixing tap, new additions such as a collar member and an annular member are added. It is possible to provide the hot water switching plug 1 with ensured safety at a low cost by effectively utilizing the existing parts without using the parts.

Further, according to the hot water switching plug 1 of the present embodiment, the hot water inlet 6 is blocked by the control valve body 9 due to the stretching of the wax element 10 as the temperature sensitive element, and the hot water switching screw 13 is also rotated to bring out the water. Return to the position of. Therefore, even if the wax element 10 cools and shrinks, the hot water switching screw 13 maintains the position of the water discharge state, so that it is possible to prevent the hot water of the predetermined temperature or higher from flowing out from the outlet again. Further, since the blocking state for preventing the hot water above the predetermined temperature from flowing out from the outlet again can be maintained by the hot water switching screw 13 of the existing component, a mechanism for maintaining the blocking state is separately provided for the hot water switching plug 1 It is not necessary to provide the function of maintaining the blocking state without increasing the number of parts and the manufacturing cost.

In the third embodiment, when the wax element 10 is stretched, the slider 12 is pressed and moved via the bias spring 11, the control valve body 9, and the bias spring 18, and the hot water switching screw 13 rotates to discharge water. I explained what returns to the position where it becomes a state. However, in the third embodiment, the elastic forces of the two bias springs 11 and 18 and the return prevention spring 14 are set so that the slider 12 does not move and the hot water switching screw 13 does not rotate even if the wax element 10 is stretched. You may. Even with such a configuration, by stretching the wax element 10, the control valve body 9 is moved to the side where the hot water inlet 6 is closed via the bias spring 11 to bring the water out, and hot water having a temperature equal to or higher than a predetermined temperature flows from the outlet 5. The effect of the present invention of preventing the outflow can be obtained.

1 ... Hot water switching tap, 2 ... Casing, 5 ... Outlet, 6 ... Hot water inlet, 7 ... Water inlet, 9 ... Control valve body, 10 ... Wax element (temperature sensitive element), 12 ... Slider, 13 ... Hot water switching Screw, 15 ... Closing mechanism, 16 ... Collar member, 16e ... Pillar part, 17 ... Circular member (overhanging part).

Claims (5)

With a tubular casing
A hot water inlet and a water inlet provided on the peripheral wall of the casing so as to be spaced apart from each other in the axial direction.
An outlet provided at the end of the casing on the water inlet side, and
A state in which water is provided so as to be slidable in the casing in the axial direction, and by sliding in the casing, the hot water inlet is closed and the water inlet is opened to allow water to flow out from the outlet. A control valve body that can be switched to either a hot water outlet state in which the hot water inlet is opened and the water inlet is closed to allow hot water to flow out from the outlet.
A hot water switching screw that is rotatably arranged at the end of the casing on the hot water inlet side and a part of which is exposed outward in the axial direction of the casing.
A slider that is screwed into the hot water switching screw and is arranged in the casing in a state where rotation is blocked, and that slides in the casing in the axial direction by rotating the hot water switching screw.
A temperature-sensitive element that is arranged in the casing and expands and contracts in response to a temperature change of hot water flowing in the casing.
The control valve body is a hot water switching plug configured to move forward and backward according to the slider that moves forward and backward by the rotation of the hot water switching screw.
By utilizing the expansion and contraction of said temperature sensitive device, e Bei a closing mechanism that hot water flowing in the casing reduces the amount of hot water to flow out from the outlet port when equal to or greater than a predetermined temperature,
The closing mechanism is composed of a collar member and an inwardly projecting portion provided on the inner peripheral surface of the casing.
A hot water switching plug characterized in that the collar member is pressed by the stretching of the temperature sensitive element and the collar member and the overhanging portion overlap each other to reduce the amount of hot water flowing out from the outlet. The hot water switching plug according to claim 1.
The hot water switching plug is characterized in that the overhanging portion is composed of an annular member fixed in the casing. The hot water switching plug according to claim 1 or 2.
A hot water switching plug characterized in that the collar member is provided with a guide portion extending toward the inside of the overhanging portion. The hot water switching plug according to any one of claims 1 to 3.
The closing mechanism is formed at least in part by the control valve body.
The hot water switching plug is characterized in that the control valve body is pressed by the extension of the temperature sensitive element, the hot water inlet is blocked by the control valve body, and the amount of hot water flowing out from the outlet is reduced. .. The hot water switching plug according to claim 4.
When the control valve body is pressed by the extension of the temperature sensitive element and the hot water inlet is closed by the control valve body, the slider is also pushed back by the control valve body and the hot water switching screw is rotated. Hot water switching tap characterized by

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