JPS6134034B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a thermostatic mixing valve that mixes separately supplied hot water and cold water to a desired temperature and automatically maintains this mixed water temperature.

<Prior Art> Conventionally, thermostatic mixing valves of various structures are known, one example of which is shown in FIG.

To explain this, a screw hole 42' is provided in the operation part D, and an adjustment screw 43 for finely adjusting the operating position of the temperature sensing part 30 is screwed into this screw hole 42'. By operating the adjustment screw 43, the set temperature can be made to correspond accurately to the temperature of the mixed water actually discharged, and at the same time, the set screw 68 is screwed onto the rear end of this adjustment screw 43 for adjustment. Although measures are taken to prevent the screw 43 from loosening,
When making fine adjustments, you must first remove the set screw 68 from the screw hole 42', operate the adjustment screw 43, and then screw the set screw 68 into the screw hole 42' again. When the screw 68 is screwed in and tightly attached to the adjustment screw 43, the adjustment screw 43 may move and become out of adjustment, or the set screw 6
It was extremely difficult to make fine adjustments to this item, as there was a risk of losing the 8.

<Problems to be Solved by the Invention> A problem to be solved by the present invention is to prevent loosening of the adjustment screw without using a set screw.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to provide a main body equipped with a water channel, a hot water channel, and a mixing water channel where these two channels merge. , a temperature sensing section arranged in the mixed water flow path and sensitive to the temperature of the mixed water; a control valve operated by the temperature sensing section to control the temperature of the mixed water to a set temperature; and an operating position of the temperature sensing section in the axial direction. Equipped with an operating section that allows you to move to and set the mixing water temperature.
An adjustment screw part is provided inside the operation part to adjust the operating position of the temperature sensing part by operating from the outside of the operation part. It is composed of a friction ring interposed at a position outside the screw, and the friction ring is formed into a disk shape, and the minimum diameter portion thereof is slightly smaller in diameter than the root diameter of the adjustment screw.

<Function> In the present invention, the minimum diameter portion of the friction ring bites into the adjustment screw to generate frictional force and prevent the adjustment screw from loosening.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6.

In the figure, A is the main body, and 1, 2, and 3 are a hot water flow path, a water flow path, and a mixed water flow path that are respectively defined inside the main body. 1 bulkhead 4
The water flow path 2 and the mixed water flow path 3 are adjacent to each other with a second partition 5 interposed therebetween.

The hot water flow path 1 and the water flow path 2 each have a hot water inlet 6 and a water inlet 7, and the hot water inlet 6 is used as a hot water source, and the water inlet 7 is used as a water supply source. Connectors 8 that communicate with each other are connected.

Note that 9 and 10 are a water stop valve and a strainer provided on the connector 8, respectively, and 11 is a water inlet for both inlets 6 and 7.
This is a check valve installed in the

In addition, the first partition wall 4 and the second partition wall 5 include a hot water flow path 1, a water flow path 2, a water flow path 2, and a mixed water flow path 3.
Insertion holes 12 and 13 are coaxially drilled to communicate with the main body A on the hot water flow path 1 side and the water flow path 2 side, respectively.
Openings 14 and 15 are formed coaxially with the insertion holes 12 and 13, respectively, and the main body A on the hot water flow path 1 side
A lid 16 is attached to the opening 14 opened in the water flow path 2.
A cylindrical liner 17 is attached to an opening 15 formed in the main body A on the side.

The lid 16 has a cylindrical portion 18 that is screwed into the opening 14 and extends into the hot water flow path 1, and the tip of the cylindrical portion 18 constitutes a hot water valve seat 19.

The liner 17 consists of a cylindrical front member 17a and a rear member 17b screwed to the cylindrical front member 17a.The liner 17 is inserted and screwed into the mixed water flow path 3 from the opening 15, and the front member 17a is inserted into the insertion hole 13 of the second partition 5. is inserted into the water flow path 2 and forms a water valve seat 20 from its tip.

In addition, the liner 17 has a through hole 21 formed in the rear peripheral surface of the front member 17a to communicate the inside of the liner 17 with the mixed water channel 3.

Reference numeral 22 is a control valve body formed in a cylindrical shape that corresponds to the hot water valve seat 19 and the water valve seat 20, respectively, and is slidably inserted through the insertion hole 12 of the first partition wall 4 to connect the hot water valve seat 19 and the water valve seat. 20, and its front and rear ends constitute a hot water side control valve a and a water side control valve b corresponding to the hot water valve seat 19 and the water valve seat 20, respectively.

The control valve body 22 is located near the opening end on the side of the water valve seat 20, and there is a partition plate 2 that partitions the control valve body 22 in the vertical direction.
3, an operating spring 24 is loaded between the partition plate 23 and the lid 16, and biased toward the water valve seat 20 side.

Further, the partition plate 23 is provided with a through hole 25 passing through it in the thickness direction.

Reference numeral 26 denotes an element case, which is formed into a cylindrical shape with an opening at the rear and is slidably disposed within the front member 17a of the liner 17, and has a protrusion 27 protruding from the center of the outer surface of the bottom of the element case as a partition of the control valve body 22. It comes into contact with the center of the plate 23.

The element case 26 is also provided with through holes 28 and 29 in its bottom and rear peripheral surface.

Reference numeral 30 denotes a temperature-sensing section housed in the element case 26. Wax, which has a very sensitive response to temperature changes and has a high expansion and contraction rate, is sealed in the case 31 as a temperature-sensing body 32. Thermal expansion and contraction of the hot body 32 causes the protruding shaft 33 to extend and contract from the rear of the case 31.

The temperature sensing section 30 is fixed to a step 34 provided on the inner circumferential surface of the element case 26 at a midway point by a fastening ring 36, so that the rear part of the case 31 protrudes from the element case 26, and the front member 17a
An element guide 37, which is held between a step portion 36 formed in the rear member 17b and a connecting end of the rear member 17b, is slidably inserted and extends into the rear member 17b.

Incidentally, as the temperature sensing section 30, a bellows or a temperature sensing pipe filled with ethyl alcohol, Freon gas, etc. may be used.

The element guide 37 is formed in a cylindrical shape, and the front member 17a and the rear member 17b are separated from each other in a air-tight manner by gaskets provided on the inner and outer peripheries of the element guide 37, so that the mixed water in the front member 17a is transferred to the rear member. 17b
I try not to let it flow inside. Rear member 17b
is formed into a cylindrical shape, and a safety spring case 39 with a cap-shaped element presser 36 screwed onto the peripheral surface of its front opening is screwed into the safety spring case 39; A safety spring receiver 40 is slidably housed in the inner peripheral surface of the safety spring case 39 and engages with the surface through a spline.

The safety spring receiver 40 is a cylindrical member 4 having a flange portion 41' and splined to the element retainer 38.
1 and a screw hole 42' which is integrally fixed to the flange portion 41' of this cylindrical member 41 by means such as caulking.
The cylindrical member 4 consists of a nut member 42 having a
A friction ring 44 is provided between the flange portion 41' of the nut member 42 and the nut member 42, and comes into contact with an adjustment screw 49 that is screwed into a screw hole 42' of the nut member 42.

As shown in FIG. 6, this friction ring 44 has a minimum diameter slightly smaller than the root diameter of the adjustment screw 43, and when the friction ring 44 bites into the adjustment screw 43, a frictional force is generated. .

The rear part of the case 31 of the temperature sensing section 30 is attached to the element presser 36, and the protruding shaft 33 protruding from the rear part of the case 31 passes through the element case 39, and an adjustment screw 43 is screwed into the safety spring receiver 40.
contact each other.

The adjustment screw 43 has a groove 45 at its rear end for engaging a tool such as a screwdriver, and is inserted into a screw hole 47 formed inside the spindle 46 (to be described later), engaged with a tool from the outside, and rotated to completely lock the spring holder. 4
The operating position of the temperature sensing section 30 is adjusted by moving the screw hole 42' of the nut member 42 of No. 0 forward and backward. Therefore, the adjustment screw part B is adjusted by the safety spring receiver 40 and the adjustment screw 43.
is configured.

Further, the adjustment screw 43 is prevented from loosening by the frictional force of a friction ring 44 provided within the safety spring receiver 40.

That is, this friction ring 44 constitutes loosening prevention means C.

In addition, the rear opening of the safety spring case 39 is a stepped portion 48.
The tip of a spindle 46 that extends through the rear end of the liner 17 is spline-engaged with the rear opening, and the operating spring 24 is inserted between the safety spring receiver 40 and the stepped portion 48. A strong safety spring 49 is loaded and the safety spring receiver 40
is normally biased by a safety spring 49 and comes into contact with the element presser 38.

The spindle 46 has a flange 50 in the middle, and the flange 50 is locked to the liner 17 by a locking ring 52 so that it can rotate but not move forward or backward by locking the flange 50 to a step 51 provided at the opening of the liner 17. The operating handle 53 is fixed to the outer end of the flange 50 with a screw 54, and a correction spring 5 is installed between the flange 50 and the stepped portion 48 of the safety spring case 39.
Load 6.

The operating handle 53 is made by wrapping a tape 53b with a temperature scale 65 around the outer periphery of a pre-formed inner cylinder 53a made of synthetic resin, and integrally molding or integrally covering the tape 53b with a handle body 53c made of transparent synthetic resin. It is formed by ultrasonic welding and is constructed so that a temperature scale 65 can be seen through from the surface, while the main body A is provided with an index 66 made of a synthetic resin bush or the like.

An indicator may be provided on the operating handle 53 and a scale may be provided on the main body A.

Therefore, the element presser 38, the safety spring case 39, the safety spring receiver 40, the spindle 46, and the operation handle 53 constitute an operation section D that moves the operating position of the temperature sensing section 30.
The temperature of the mixed water is set by operating the temperature scale 65 to match the index.

That is, when the spindle 46 is rotated by the rotation operation of the operating handle 53 and the safety spring case 39 is advanced, the temperature sensing portion 30 is moved by the element presser 38 fixed to the front end of the safety spring case 39
is pushed forward, the control valve body 22 moves forward (toward the hot water valve seat 19 side) via the element case 26 that engages with the temperature sensing part 30, and conversely, the operating handle 53 is rotated in the opposite direction. safety spring case 3
When the valve 9 is moved backward, the control valve body 22 is moved backward (toward the water valve seat 20 side) under pressure by the operating spring.
By adjusting the opening degrees of the hot water side control valve a and the water side control valve b, respectively, the ratio of the inflow amount of the hot water to the water, in other words, the temperature of the mixed water is set.

On the other hand, the mixed water flow path 3 is connected to the bus side on-off valve 56a.
and communicates with the bus-side discharge section 57a and the shower-side discharge section 57b, respectively, via the shower-side on-off valve 56b.

Both on-off valves 56a and 56b are connected to their valve bodies 62 through valve guides 58 in the mixed water flow path 3.
a, 62b are provided slidably, respectively, and both on-off valves 56a,
A spring 59 that presses the valve 56b in the direction of closing the valve.
Attach oppression.

The rear part of the valve guide 58 is connected to a spindle 60 that moves back and forth by rotation, and an opening/closing handle 61 is provided at the outer end of the spindle 60.

That is, normally, as shown in FIG. 3, both the bus-side on-off valve 56a and the shower-side on-off valve 56b are closed, but by rotating the on-off handle 61 and moving the spindle 60 forward, the tip of the valve opens. The bus side on-off valve 56a is opened and closed by pushing the body 62a, and the fluid in the mixed water flow path 3 flows to the bus side discharge part 57a and is discharged from the bus discharge port 63 connected to the part 57a.

In addition, by rotating the opening/closing handle 61 in the opposite direction and retracting the spindle 60, the front end of the valve guide 58 pulls the valve body 62b and moves it in the opening/closing direction, and the fluid in the mixed water flow path 3 flows into the shower side discharge part 57b. and is supplied to the shower via the shower hose 64 connected to the section 57b.

Note that when one of the on-off valves 56a, 56b is open, the spring 59 causes the other to close.

Therefore, in such a thermostatic mixing valve, the hot water entering the hot water flow path 1 with the mixed water temperature set by the operation part D is passed through the hot water side control valve a and the control valve body 22.
The water that has entered the water flow path 2 through the inner and outer through holes 25 passes through the water side control valve b, enters the element case 26 through the through holes 28 at the bottom of the element case 26, and mixes. It flows while contacting the portion 30 and flows into the mixed water channel 3 through the through hole 29 on the circumferential surface of the element case 26 and the through hole 21 on the circumferential surface of the liner 17. Therefore, the bus side on-off valve 56a or the shower side on-off valve 56b can be opened by operating the on-off handle 61.
When the water is opened, the water is supplied to the bath spout 66 or the shower via the opened on-off valve.

At this time, when the temperature of the mixed water becomes higher or lower than the set temperature due to a change in the hot water supply or water supply pressure, the temperature sensing part 30 works to automatically adjust the opening degree of the valve to adjust the temperature of the mixed water. It is becoming easier to maintain That is, if the temperature of the mixed water rises due to reasons such as an increase in oil supply pressure, the wax, which is the temperature sensor 32 of the temperature sensor 30, expands and pushes out the protruding shaft 3. Since the rear end of this protruding shaft 33 is held down by an adjustment screw 43, the temperature sensing section 30 itself moves forward. Therefore, the element case 26 engaged with the temperature sensing part 30 moves forward in the direction of closing the hot water side control valve a, in other words, the control valve body 22 is moved toward the operating spring 24.
approaches the hot water valve seat 19 against the elastic force of the hot water side control valve a, the opening degree of the hot water side control valve a decreases, and the inflow amount of hot water decreases, and at the same time, the control valve body 22 moves away from the water valve seat 20 and the water The side control valve b moves in the direction of opening, and the opening degree of the water side control valve b increases, increasing the amount of water flowing in and lowering the temperature of the mixed water.

When the temperature of the mixed water drops below the set temperature, the operation is completely opposite to that described above, and the mixed water is always maintained at the set temperature.

Furthermore, if there is a difference between the mixed water temperature and the set temperature, that is, the temperature indicated by the temperature scale 65 on the operating handle 53 and the indicator on the main body A, the difference can be easily adjusted by operating the adjustment screw part B. can be eliminated. That is, the screw 54 of the operating handle 53 is removed from the screw hole 47, and a tool such as a screwdriver is inserted from the outside through the screw hole 47 and the inner space of the safety spring case 39 to engage with the groove 45 of the adjustment screw 43. The adjustment screw 43 is advanced or retreated by rotational operation against frictional force, and the operating position of the temperature sensing section 30 is moved and adjusted without moving the operation section D to eliminate the difference between the mixed water temperature and the set temperature. Moreover, the adjustment screw 43 is automatically maintained in its state by the loosening prevention means C that prevents it from loosening by frictional force, so that it will not loosen due to vibrations during transportation or long-term use. Therefore, unlike the conventional example, there is no need to attach or remove the setscrew 68 when making fine adjustments, making the adjustment easy.
However, in the present invention, this is not necessary, and as in this embodiment, the safety spring case 39 and the spindle 46 are formed separately in the operating section D, and the operating handle 53 is connected to the main body. It becomes possible to create a structure that rotates with respect to A but does not move in the axial direction.

<Effects of the Invention> Since the present invention has the above configuration, it has the following advantages.

Since the minimum diameter part of the friction ring on the adjustment screw part is formed to have a slightly smaller diameter than the root diameter of the adjustment screw, the friction force can strongly prevent loosening, and since a set screw is not used as in the conventional example, it is possible to prevent loosening. There is no need to attach or remove the setscrew when making adjustments, and the adjustment can be made directly to the adjustment screw, which not only simplifies the adjustment, but also allows fine adjustment to prevent loosening, making it easier to remove the setscrew like in the conventional case. I have never had a problem with the adjustment being messed up when I put it on, and I can always get precisely adjusted mixed water.

Since the outer periphery of the friction ring is guided by the inner periphery of the nut member, there is no wobbling, and together with the above-mentioned advantages, loosening is reliably prevented.

The adjustment screw part is equipped with a friction ring to prevent loosening, so there is no need to provide a continuous screw hole outside the operation part to attach and remove the set screw as in conventional models, and the adjustment can be made inside the operation part. Easy to install and easy to process inside.

[Brief explanation of the drawing]

The drawings show the actual shutting mode of the thermostatic mixing valve of the present invention; FIG. 1 is a vertical front view, FIG. 2 is a cross-sectional plan view with the connector removed, FIG. 3 is a vertical side view, and FIG. 4 is a cross-sectional view. Fig. 1 is a sectional view taken along the line - Fig. 5 is an enlarged sectional view of the main parts, Fig. 6 is a plan view of the friction ring that constitutes the loosening prevention means, and Fig. 7 is an example of a conventional thermostatic mixing valve. FIG. A...Main body, B...Adjusting screw part, C...Loosening prevention means, D...Operation unit, a, b...Control valve (hot water side control valve, water side control valve), 1...Hot water flow Road, 2...
Water channel, 3...Mixed water channel, 30...Temperature sensing section,
42... Nut member, 43... Adjustment screw, 44...
...Friction ring.

Claims (1)

[Claims] 1. A main body equipped with a water flow path, a hot water flow path, and a mixed water flow path where these two flow paths merge, a temperature-sensing section that is arranged in the mixed water flow path and is sensitive to the temperature of the mixed water, and the temperature-sensing section It is equipped with a control valve that is activated to control the mixed water temperature to a set temperature, and an operating section that moves the operating position of the temperature sensing section in the axial direction to set the mixed water temperature. The adjustment screw part is operated from one side to adjust the operating position of the temperature sensing part, and the adjustment screw part is connected to a nut member, an adjustment screw, and a flick interposed between the inside of the nut member and the outside of the adjustment screw. 1. A thermostatic mixing valve comprising a friction ring, wherein the friction ring is formed into a disk shape, and the smallest diameter portion thereof is formed to have a slightly smaller diameter than the root diameter of the adjustment screw.