JPS6231235B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a hot water mixing valve mechanism of a hot water mixing faucet using a thermostatic method or a mixing method among sanitary appliances, and a water mixing valve mechanism that automatically adjusts the amount of mixed water after discharging a preset amount of mixed water. This relates to a combination with a quantitative water stop setting mechanism that stops the discharge of mixed water at a fixed rate.

Conventionally, in an outflow rate setting mechanism that can arbitrarily set the outflow rate of water, the rotation of the blade axle is decelerated by a deceleration mechanism and transmitted to the outflow rate setting shaft, and a two-piece cam provided on the setting shaft is used. By matching the valve rod of the valve that opens and closes the water supply port, the amount of water flowing out can be set and the valve closed after the set amount has flowed out. (Figure 7).

To explain about FIG. 7 above, the rotational force of the blade axle 61 is transmitted to the outflow amount setting shaft 62 via a speed reduction mechanism using a gear train, and the two-piece cam structure is installed on the same axis. Of the circular cam 63 and the fixed cam 64, the circular cam 63 is given slow rotation,
The engagement pin 65 implanted in the circular cam 63 and the engagement position of the notch 66 range of the fixed cam 64 and the circular cam 6
The water meter 70 discharges a preset amount of water and closes the valve port 69 when the water flow is completed, depending on the positional relationship between the notch 66' of No. 3 and the valve rod 68 of the valve 67. has been done.

In the case of the above, there is an essential connection due to the two-piece cam structure of a circular cam and a fixed cam, as well as the positional relationship between the engagement pin and the notch of the fixed cam, the notch of the circular cam, the angle of the notch, etc. This has resulted in disadvantages such as a limit to the range in which the temperature can be adjusted and the adjustment required when assembling both cams.

In addition, the hot water valve and the mixing chamber that stores the mixed water are in free communication, and the water valve automatically stops when a preset amount of mixed water whose temperature is adjusted according to the opening degree of the water valve is released. As a mixing faucet that stops the discharge of mixed water, there is one shown in Fig. 1 of Japanese Patent Application Laid-Open No. 14666/1983 (Fig. 8 of the drawings of the present application).

To explain about FIG. 8 above, the main body 71 of the mixing faucet includes a hot water passage 72, a water passage 73, and a mixed water passage 74.
and an outflow passage 75 are sequentially installed, and the mixed water passage 7
A valve 79 that opens and closes by engaging with a cam 78 provided in the middle of a flow path 77 is associated with the valve port 76 opened at 4, and a hot water path 72' and A control valve 81 having a flow rate control valve seat 80 is provided, and check valves 82, 82 are provided midway between the main body 71 and the water pipe and hot water storage tank.

In the case of the above, the range of temperature adjustment is limited due to the cam which does not change much, and the hot water passage, water passage and mixed water passage are in free communication, so the set When the valve is closed after discharging the amount of mixed water, the water is stopped in the mixed water passage while both the hot water and water remain in communication on the primary pressure side, so the pressure of either the hot water or the water becomes stronger. side flows back to the side with less pressure. Therefore, if water flows backwards to the hot water side, the safety valve of the hot water storage tank will be pushed open and all the hot water will be pushed out, and if hot water flows backwards to the hot water side, it will not only make the inside of the water pipes unsanitary, but also cause the water supply to be damaged by boiling water. This may cause inconvenience such as damage to the meter. In this case, the check valve installed in the middle of the hot water passage and water passage is
Normally, a weak spring that does not impede water flow is used, so if a foreign object is caught between the check valve and the valve seat, the spring's elasticity alone will not be able to completely stop the water flow. .

This invention solves the above-mentioned problems, and combines a fixed-quantity water stop setting mechanism with a single grooved cam and a hot water mixing valve mechanism for automatic temperature adjustment for hot and cold water. The purpose is to expand the set amount and temperature control range and to separately and automatically close the hot water side and water side valve ports at the same time as finishing supplying the preset amount of mixed water. .

The basic structure of this invention includes a hot water mixing valve mechanism that can automatically adjust the temperature using a thermostat, and a guide edge of a stopper that locks or releases the metering impeller as necessary. A quantitative water cut-off setting mechanism linked to a deceleration mechanism, and valve guides of a flush-type hot water valve and a water valve that cut off hot water and water separately, are engaged with guide grooves and action grooves on the circumferential surface. a grooved cam connected to open and close the hot water valve port and the water valve port in a temperature controlled manner;
A single grooved cam with spiral guide grooves on its circumference expands the temperature control range of the mixed water.
While the hot water and water separately supplied from the hot water mixing valve mechanism are mixed at an appropriate temperature, the mixed water is supplied at a preset amount by the fixed amount water stop setting mechanism, and when the fixed amount supply is finished, the hot water and water are mixed. This allows the water to be stopped separately while remaining separate.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Embodiments of this invention are shown in FIGS. 1 to 5A,
As shown in B and C, the hot water mixing faucet 1 is equipped with a hot water mixing valve mechanism A that can automatically adjust the temperature by a fixed amount water stop setting mechanism 2 and a thermostat, and a public speed reduction mechanism B, as well as a hot water mixing valve. Mechanism A
By connecting the hot water flow path 3 and the water flow path 4 to the hot water flow path 3 and the water flow path 4, a grooved cam 5 for temperature adjustment and flow rate setting is installed in the middle of the hot water flow path 3 and the water flow path 4 which are separated from each other.
A cam chamber 6 accommodating the cam chamber 6 and a gear box 7 communicating with the cam chamber 6 are provided in series. The grooved cam 5 has a circular plane, a shaft insertion hole 9 in the center through which the handle shaft 8 is loosely inserted, and an opening with a substantially fan-shaped cross section on the opposite side of the shaft insertion hole 9, so that the pin 10 can be rotated freely. Notch grooves 11, 11 are provided parallel to the shaft insertion hole 9, and a plurality of guide grooves 12, 12 are spirally parallel to the circumferential surface of the grooved cam 5 and allow a fixed amount of mixed water to be released. ', and connected to each inner end of the guide grooves 12, 12' (i.e., one pair of sides on the circumferential surface of the grooved cam 5), a semicircular notch 13 is formed for full discharge with a notch of the same depth. The working groove 14 is provided in an arc shape and has a deep notch in the center of the working groove 13 to adjust the flow rate by tilting it into a concave mountain-shaped cross section.
4 are provided with water stop positions E and E' where the water stops when a pair of valve guides 15 (to be described later) are engaged, and due to this correspondence, the hot water valve 16 and the water valve 17 are connected to the hot water valve port 18. The water valve ports 19 are arranged so as to be closed, and the valve guides 15 are arranged in the same manner so that the flow rate of hot water can be adjusted to the same amount according to the position where the valve guides 15 engage with the working grooves 14. , 12', the guide groove 12 communicates with the water stop position E so that a preset amount of mixed water can be released when the water is engaged with any of the positions of the guide groove 12'.
It leads to E′. The operation grooves 13, 13 and the valve guides 15, 15 are engaged to form a stopper 2, which will be described later.
When the impeller 26 is prevented from rotating by 9, the mixed water can be discharged without limit. By providing a guide edge 20 perpendicular to the axial direction and a gently sloped guide edge 20' on one end surface of the grooved cam 5, it can be freely engaged with and disengaged from a stopper 29 that stops an impeller 26, which will be described later, only during continuous water discharging. In addition, the guide edges 20, 20' and the guide grooves 12, 1
2' are parallel to the same inclination angle, the guide grooves 12 and 12', which have started the engagement position with the valve guide 15 (i.e., the flow rate setting position), are activated by the rotation of the grooved cam 5. While sequentially changing the engagement position between the grooves 14 and 13 and the valve guide 15, the working groove 1
When reaching the water stop positions E and E' of 4 and 14, a preset amount of water is discharged and the hot water valve port 18 and the water valve port 19 are simultaneously closed, and the hot water and the water are stopped separately. It's connected. The handle shaft 8 is supported in the cam chamber 6 via bearings 21, 21', and a rolling gear 23 is loosely fitted between the seat 22 at the end of the handle shaft 8 and the bearing 21, and this rolling gear is The moving gear 23 idles when the handle shaft 8 is connected to set a fixed amount of mixed water discharge, and when transmitting a slow speed by linking with the reduction mechanism B described later, the moving gear 23 rotates idly between the seat 22 and the rolling gear 23. The spring 24 and the elasticity of the ring 25 between the rolling gear 23 and the bearing 21 transmit a gentle rotation in the return direction to the handle shaft 8, and at the same time transmit the gentle rotation in the return direction to the grooved cam 5 through the pin 10 in the same direction. The quantitative water cutoff setting mechanism 2 is constructed by linking the water stoppage setting mechanism 2 so as to provide the rotation. (See Figures 2 and 3) The impeller 26 is supported via a shaft 28 in the middle of the mixed water flow path 27, and a transmission gear 23'' provided at the end of the shaft 28.
is meshed with the first gear G of the reduction mechanism B, so that the rotational force of the impeller 26 is reduced to a predetermined rotational speed while sequentially passing through the official gear train from the first gear G,
This reduced rotational force is transmitted to a rolling gear 23' coaxially with the sixth gear G1 at the end, and is linked so as to be transmitted to the rolling gear 23 meshing with this rolling gear 23'. . The stopper 29
The working head 30 at one end facing the cam chamber 6 is always elastically pressed against the guide edge 20 or 20' of the grooved cam 5, and the working head 30 is pressed against the guide edge 20 or 20' of the grooved cam 5.
0, by interposing the curved rod portion 31 at the other end of the stopper 29 between the blades of the impeller 26, the rotation of the impeller 26 is stopped when the mixed water is discharged without limit. Head 30 is guide edge 2
When corresponding to 0', the curved rod portion 31 is retracted to the position indicated by the chain line 31a, and the impeller 26 is connected so that it can rotate. In addition, a scale for quantitative setting is provided on the circumferential surface of the handle H for quantitative setting attached to the handle shaft 8, and the desired quantitative setting can be performed using indicators (all not shown) provided at corresponding parts of the hot water mixing faucet 1. I am trying to do this. The hot water mixing valve mechanism 2 includes:
Hot water flowing from the hot water valve port 18 communicating with the hot water supply source through the hot water inlet 32 communicating with the hot water flow path 3 is connected to the temperature sensing body case 3 through which the hot water flows between the hot water valve seats 33 and communicating with the inside of the switching valve 34.
Arrow P into the mixing chamber 36 via the interior of 5 and the outlet 39
During water supply, the switching valve 34 is separated from the water valve seat 38 due to the temperature response by the temperature sensor 37, so that the water inlet communicating with the water flow path 4 from the water valve port 19 communicating with the water supply source is removed. The water, which has reached 40°C, is introduced into the temperature sensing case 35 through the gap between the water valve seat 38 and the switching valve 34, and flows through the same route as hot water to the mixing chamber 36, where it is mixed with the hot water and has an appropriate temperature. A thermostatic system is configured to create mixed water. Further, the hot water valve 16 and the water valve 17 have a normal flush valve structure, and when the hot water valve port 18 and the water valve port 19 are closed, the hot water and water entering the paired back pressure chamber 41 are 16 and a pair of movable valve shafts 4 of water valves 17
By operating valve 2 in the opening direction, relief valve 4 on the same axis
3 is opened to push out hot water and water in the back pressure chamber 41 to lower the internal pressure, the hot water valve 16 and the water valve 17 are connected to open the hot water valve port 18 and the water valve port 19. The mixed water that has reached the mixing chamber 36 as described above is
The mixed water flow path 27 communicating with the mixing chamber 36 is in communication with the mixed water flow path 27 so as to rotate the impeller 26 provided in the middle of the mixed water flow path 27 while passing through, and the mixed water flows through the mixed water flow path. 27' is connected so that mixed water can be supplied to either a faucet 45 or a pipe joint 46 leading to the shower head by switching the switching handle 44 shown in FIGS. 1 and 6. Note that the hot water mixing valve mechanism A
There is no problem even if a normal mixing method is adopted.

Now, to explain the case where the required amount of mixed water is supplied to, for example, a washing machine or a hot water tank (both not shown), first, the handle shaft 8 is operated in a predetermined direction via the handle H shown in FIG. When the required discharge amount is set by adjusting the scale, the grooved cam 5 connected to the handle shaft 8 via the pin 10 moves to the water stop positions E, E' and the valve guides 15, 15 as shown in FIG. When the valve guides 15 and 1 reach the working grooves 14 and 14, which communicate with the water stop positions E and E', respectively, due to the same inclination, the valve guides 15 and 1
5 is successively pushed back to increase the opening amounts of the hot water valve 16 and the water valve 17 to the same amount, and the valve guides 15, 15 are aligned with the working groove 1.
3,13, the hot water valve 18 and the water valve 19 are fully opened to release the entire amount of hot water, and
By the subsequent rotation of the handle H, the valve guide 15,
The position corresponding to 15 transitions to the guide grooves 12, 12'. At this time, one of the valve guides 15 is engaged with the guide groove 12 communicating with the water stop position E, and the other is with the guide groove 12' communicating with the water stop position E' while changing the engagement relationship between both the guide grooves 12, 12'. It stops when it reaches a predetermined quantitative setting position in the middle, and by this operation, the same amount of hot water and water are supplied to the hot water flow path 3 and the water flow path 4. During this quantitative setting, the grooved cam 5 is freely displaced in the axial direction due to the helical structure of the guide grooves 12, 12', and the rolling gear 23 on the handle shaft 8 is connected to the rolling gear 23' of the reduction mechanism B. The handle shaft 8 can be smoothly operated by meshing with each other and rotating idly on the handle shaft 8.
As the grooved cam 5 rotates, the engagement position between the guide edge 20 of the grooved cam 5 and the operating head 30 of the stopper 29 that was in contact with the guide edge 20 changes to the position where the guide edge 20 is engaged.
0', the curved rod part 31 that was displaced as shown by the chain line 30a and interposed between the impellers 26 is replaced by the chain line 31.
Evacuate to position a. (See Figures 3 and 4 C) During this time, the hot water that has entered the switching valve 34 from the hot water inlet 32 of the hot water mixing valve mechanism A communicating with the hot water flow path 3 passes through the temperature sensitive body case 35. From the outlet 39 the mixing chamber 36 is reached. (See Figure 1) During this time, the temperature sensing element 37 moves the switching valve 34 toward the hot water valve seat 33 side to limit the flow rate on the hot water side, and at the same time, the water valve seat 38 Because it opens
The inflowing water reaches the mixing chamber 36 through the same route, and during this time hot water is changed into mixed water at an appropriate temperature. This mixed water passes through the mixing water passage 27 leading to the end of the mixing chamber 36 while rotating the impeller 26 while reaching the mixing water passage 27'. The rotational force of the impeller 26 is sequentially decelerated through the first gear G of the reduction mechanism B that meshes with the rolling gear 23' at the end of the shaft 28, and gives slow rotation to the sixth gear G1 by a predetermined deceleration.
This rotation is transmitted to the coaxial rolling gear 23' and the rolling gear 23 meshing therewith. In this case, the rolling gear 23 includes springs 24 and rings 25 on both sides.
The handle shaft 8 can be rotated slowly by being pressed against the shaft end of the handle shaft 8 by the elasticity of the handle shaft 8 and by being driven by the gentle rotation.

This slow rotation of the handle shaft 8 in the return direction causes the grooved cam 5 to rotate in the opposite direction, so that
The guide grooves 12, 12' of the grooved cam 5 and the valve guide 1
The engagement positions with 5 and 15 are also sequentially displaced, and the working grooves 13 and 14 approach the water stop positions E and E' in this order from the guide grooves 12 and 12', and both water stop positions E and E' is the third
When the engagement relationship with the valve guides 15, 15 shown in the figure is restored, supplying a preset amount of mixed water is completed, and at the same time, the operating head 30 of the stopper 29 is moved from the guide edge 20' of the grooved cam 5. After returning to the position 20, the curved rod portion 31a is returned to the position 31, and the rotation of the impeller 26 is stopped.

Since the present invention is constructed as described above, it has the following advantages.

(1) A plurality of parallel guide grooves are provided on the circumferential surface of a single grooved cam, and an operating groove that connects to both guide grooves to release the entire amount of mixed water, an operating groove for flow rate adjustment, and an identical water stop position. Since it is installed on one side of the periphery, it can operate simultaneously with the separate hot and cold water valves.
It is possible to simultaneously adjust the flow rate and shut off hot and cold water separately.

(2) The grooved cam is loosely fitted onto the handle shaft for flexibility in the axial direction, and can be interlocked in the rotational direction of the handle shaft via the notched groove parallel to the shaft insertion hole. Centered around the handle axis
It can freely rotate more than 360 degrees and reciprocate in the axial direction.

(3) A guide edge parallel to the guide groove and a guide edge not parallel to the guide groove are formed in a stepped manner on the end face of the grooved cam, so that the impeller can be released when discharging a fixed amount of mixed water and when discharging without limit. It is possible to automatically apply rotation prevention.

(4) The rolling gear loosely fitted to the end of the handle shaft is elastically held between the seat of the handle shaft and the bearing via a spring and ring, so there is no idling when the handle shaft rotates when setting the flow rate. Accordingly, only the slow rotation transmitted via the speed reduction mechanism can be transmitted to the handle shaft.

(5) The hot and cold mixer faucet is equipped with a fixed amount water stop setting mechanism with a grooved cam and a hot water mixing valve mechanism with separate valve mechanisms for hot and cold water that can automatically adjust the temperature using a thermostat. Not only can the range of adjustment of the set amount and temperature of mixed water be significantly increased, but also by separately shutting off the hot water and water, it is possible to reliably prevent backflow of the fluid on the side that exceeds the pressure.

(6) Compared to the conventional complicated two-piece cam that cannot be rotated beyond 180°, a single grooved cam has a separate valve mechanism for hot water and water, and a mixing valve mechanism for hot water and water that can automatically adjust the temperature. This has great effects, such as widening the scope of use of hot and cold water mixer faucets, and at the same time not wasting hot water to adjust the temperature.

[Brief explanation of the drawing]

Fig. 1 is a front cross-sectional view of a hot water mixer faucet equipped with the device of the present invention, Fig. 2 is a plan cross-sectional view taken along line X-X in Fig. 1, and Fig. 3 is a cross-sectional view taken along line X-X in Fig. 1. FIG. 4A is an enlarged front view of the grooved cam, B is a plane sectional view taken along the W-W line in A, and C is a developed view of the grooved cam. 5A is a partially enlarged sectional view taken along the Y-Y line in FIG. 2, B is a developed view of the speed reduction mechanism shown in A, and FIG.
- The partially omitted and partially broken plan view of the Z line, FIGS. 7 and 8 are explanatory views of the prior art. (Explanation of symbols of main parts), 1... Hot water mixer faucet, 2... Fixed amount water stop setting mechanism, 3... Hot water flow path, 4
... Water flow path, 5 ... Grooved cam, 8 ... Handle shaft, 10 ... Pin, 11 ... Notch groove, 12, 1
2'... Guide groove, 13, 14... Working groove, 15...
...Valve guide, 16...Hot water valve, 17...Water valve, 2
0, 20'... Guide edge, 23, 23'... Rolling gear, 26... Impeller, 29... Stopper, A...
...Hot water mixing valve mechanism, B...Reduction mechanism, E, E'...
...Water stop position.

Claims (1)

[Claims] 1. A hot water/water mixing valve mechanism that automatically adjusts the temperature using a thermostat, and valve guides provided in the hot water valve on the hot water flow path and the water valve on the water flow path in a spiral shape on the circumferential surface of a grooved cam. A rolling gear that transmits only slow rotation to the handle shaft by separately engaging multiple guide grooves provided in parallel with each other, and by loosely fitting a grooved cam to the handle shaft for axial flexibility and rotation. a quantitative water cutoff setting mechanism that connects a speed reduction mechanism via the grooved cam and allows the positional relationship between the guide groove of the grooved cam, the working groove communicating with the guide groove, and the valve guide to be freely selected when the valve guide is engaged. While mixing hot water and water separately supplied from the hot water mixing valve mechanism to an appropriate temperature using a single grooved cam, the mixed water is heated to a preset amount by the fixed amount water stop setting mechanism. A quantitative water stop valve device for a mixing faucet that is characterized by automatically supplying and stopping water. 2. Rotation in the direction of fixed quantity setting and flow rate adjustment via a notched groove on the handle shaft, which has a pin horizontally connected to the deceleration mechanism and fixed quantity water stop setting mechanism at the shaft end;
2. The metering water stop valve device for a mixing faucet according to claim 1, further comprising a grooved cam that is loosely fitted in the cam so as to be flexible in the axial direction as it rotates. 3. A grooved cam in which a spiral guide groove provided on the circumferential surface and one guide edge provided in an annular shape on the end surface and which switches the operating position of the stopper are tilted parallel to each other is supported on the handle shaft. A quantitative water stop valve device for a mixing faucet according to claim 1, characterized in that: 4. A semicircular arc-shaped full-volume release working groove whose one end is connected to the spiral guide groove, and in the center of this working groove,
A working groove inclined in the shape of a chevron is recessed, and a water stop position is provided in the center of the working groove to engage with the valve guide to stop a certain amount of water. 4. The metering water stop valve device for a mixing faucet according to claim 2 or 3, further comprising a grooved cam provided on one pair of sides of the surface.