JPS6141018Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a mixing faucet for mixing water and hot water.

Conventionally, as a mixing faucet of this type, one as shown in FIG. 1 has been proposed. In this case, the thermostat A, the mixing valve B, etc. are of a cartridge type, and the hot water pipe connecting member D is connected to the inside of the valve box C.
It can be removed and inserted or taken out, which is convenient for repairs, etc. However, in this case, the hot water pipes E connected to the member D must be attached and detached one by one, which is troublesome. In addition, cold water is press-fitted from the cold water connection port F,
Since the pressure of the cold water acts on the mixing valve B in the direction of its movement, it was necessary to provide a balance valve G to compensate accordingly.

In view of the above, the present invention has made the thermostat and valve body into a unit type to facilitate repairs, etc.
The purpose of this invention is to propose a mixing faucet that can solve the above-mentioned disadvantages even if it is made into a unit type.
a support portion that slidably supports the control body unit;
an engaging portion that regulates the insertion position of the control body unit;
A lumen 5 is provided with an inlet/outlet for a control body unit having a removable tight-fitting lid 24, and the control body unit has a wax type thermostat 15 and a valve body 3 operated by the wax type thermostat.
1, and a cylinder 23 in which the valve body 31 and a holder 28 holding the wax type thermostat 15 are slidably housed, and the cylinder has a water side valve corresponding to one side of the valve body. A cap 33 having a seat 38 and a hot water side valve seat 39 corresponding to the other surface of the valve body is screwed to one open end, and a means for preventing the holder 28 from coming off is provided at the other open end to form a single unit. It is structured so that it can be handled.

This invention will be explained below based on the embodiments shown in the figures.

FIG. 2 shows an embodiment of this invention. Reference numeral 1 denotes a main body, which has a lumen 5 inside, and a control body unit 5.
It stores 1. The control body unit 51 can be attached and detached by attaching and detaching the rear cover 24 using screws 26 provided at the end of the main body 1. Main body 1 and rear cover 2
4 is sealed by an interposed O-ring 25. The main body 1 is provided with a water passage 2, a hot water passage 3, and a mixed water outflow passage 4. communicated through (not). Similarly, the hot water passage 3 is also communicated with the hot water supply side of an external hot water heater or the like via a hot water passage opening/closing valve and a check valve (not shown) (to prevent backflow to the supply side). The mixed water outflow path 4 communicates with a faucet or shower.

The control body unit 51 houses the valve body 31 on the large inner diameter side of the cylinder 23, and uses the portion from the large inner diameter portion to the small inner diameter as a water side valve seat 38 to restrict movement of the valve body 31 in one direction. There is. Movement of the valve body 31 in the other direction is regulated by a hot water side valve seat 39, which is the inner end of the cap 33, which is screwed to a screw 40 provided at the open end on the large inner diameter side of the cylinder 23 to close the open end. ing. The gap between the valve body 31 and the water side valve seat 38 is defined as a water inflow control port 35, and the gap between the hot water side valve seat 39 is defined as a hot water inflow control port 34. This control port 35, 34
is changed and controlled by the movement position of the valve body 31. A spring 32 is provided that seats each end face of the cap 33 and the valve body 31 so that the valve body 31 is always pushed against the water side valve seat 38. An O-ring 50 is provided on the outer periphery of the valve body 31, and contacts the inner periphery of the cylinder 23 to block communication between the hot water inflow control port 34 and the water inflow control port 35 at the outer periphery of the valve body 31. The cylinder 2 on the hot water side valve seat 39 side communicates with the hot water inflow control port 34 and the outside of the cylinder 23.
A hot water intake port 36 is cut out and provided on the circumferential side surface of 3.
Similarly, an O-ring 50 is sandwiched between the water inflow control port 35 and the outside of the cylinder 23 so as to communicate with each other. An inlet 37 is provided by cutting it out. A cylindrical holder 28 having a protrusion 30 that contacts the valve body 31 near the center is housed in the guide 29 on the other small inner diameter side of the cylinder 23 and is guided to move in the axial direction. A concave groove is provided on the inner surface of the open end side of the guide 29, and a retaining ring 46 such as a concentric retaining ring for a hole having spring properties is provided in this concave groove. At this time, since the inner diameter of the retaining ring 46 after being assembled is smaller than the outer diameter of the holder 28, the movement of the collar 52 of the holder is prevented by the retaining ring 46 and the holder 28 does not fall off the guide 29. In other words, from the cylinder 23 to the holder 28
will not fall off. In this case, the holder 28
The movable range is determined by the retaining ring 46 and the collar portion 52 so that the protrusion 30 does not obstruct the movement (seating) of the valve body 31 when the valve body 31 is seated on the water side valve seat 38.
Similarly, the protrusion 30 moves the valve body 31 until the valve body 31 is seated on the hot water side valve seat 39.
It must be possible to press the Valve body 3
1 is provided with a hot water outlet that communicates the hot water inflow control port 34 side and the water inflow control port 35 side.

As described above, the holder 28 has a cylindrical container shape with one end provided with a protrusion 30 that presses the center portion of the valve body 31 and the other end open. Valve body 31 and cylinder 23
The space surrounded by the holder 28 is defined as a mixing section 42. A cutout hole 28 communicating with the mixing section 42 is provided on the end surface of the holder 28 on the side of the protrusion 30 . The inner cavity of the holder 28 houses a wax-type thermostat 15 that compresses and compresses the piston 16 in response to changes in volume using wax that changes in volume due to temperature changes. The support 44 engages with a convex portion of the wax type thermostat 15 and a stop portion on the inner periphery of the holder 28 so as to prevent the wax type thermostat 15 from moving toward the valve body 31. In order to prevent the wax type thermostat 15 from falling off, the wax type thermostat 15 is engaged with the concave portion of the holder 28 to prevent movement of the wax type thermostat 15 and the support 44 from wobbling. Further, the support 44 and the stop pin 45 have a sufficient flow path so as not to obstruct communication from the mixing portion 42 through the holder inner cavity to the open end. For example, the stop pin 45 may be in the form of a springy wire, and the support 44 may be in the form of a star.

Mixing section 4 of holder 28 configured in this way
2 and the open end on the stop pin 45 side is defined as a mixed water passage 43. The above is controlled by the control body unit 51.
shall be. The control body unit 51 to the main body 1 is connected to the rear cover 2.
From the 4th side, the cylinder 23 provided on the main body 1 side
Insert it until it stops at the stopper 47, which has a smaller inner diameter, on the larger outer diameter side. Cap 3 is fixed to the main body.
3. Sandwich the washers 27 interposed on top of the rear lid 2.
This is done by tightening the screws in step 4. The water passage 2 of the main body 1 annularly surrounds the cylinder so that the water intake port 37 communicates with the water passage 2 . At this time, an O-ring 48,
49 is provided in a concave groove on the outer periphery of the cylinder, and is in contact with the main body to provide a sealing effect. Similarly, hot water passage 3
surrounds the cylinder in an annular manner so that the hot water intake port 36 communicates with the cylinder. The water passage 2 and the hot water passage 3 are adjacent to each other with a wall separating them in a portion surrounding the cylinder in an annular manner. Therefore, the O-ring 48 serves to prevent leakage from the hot water passage 3 except where it communicates with the hot water intake port 36.

A handle 6 is provided on the side facing the rear lid 24 of the main body 1, and engages with a screw 10 provided on the main body 1 to move forward and backward on a shaft.
To prevent leakage between the valves, a gasket receiver 21, a rubber gasket 20, and a gasket retainer 19 are used as described in the water faucet section of the JIS standard. It is not limited to this as long as it can prevent leakage between the main body 1 and the handle 6. An inner cavity 11 is provided in the large diameter portion of the handle 6 on the wax-type thermostat 15 side, and a relief spring 14 is housed in the inner cavity 11. A plate 12 that can be slid in the inner cavity 11 by compressing and expanding the relief spring 14 is housed in the inner cavity 11 with the relief spring 14 being compressed and biased in advance.
At this time, in order to prevent the plate 12 from being ejected from the inner cavity 11 due to the urging force, a retaining ring 13 having a spring property is provided at the open end of the inner cavity and is engaged with a groove provided near the inner cavity. The retaining ring 13 has a concave shape near the center to facilitate receiving the piston 16. Normally, the plate 12 is held in contact with the retaining ring 13 by the force of the relief spring 14.
Even after the valve body 31 is seated on the hot water side valve seat 39, if force is applied to the piston 16 so that the piston 16 extends or the handle 6 is extended toward the valve body 31, it is possible to prevent damage to the various parts. To protect the wax-type thermostat 15 from bursting, the relief spring 14 is compressed and the plate 12 retreats. Therefore, it goes without saying that the relief spring 14 is set to be stronger than the spring 32. A temperature setting knob 7 is attached to the handle 6 through a spline groove and tightened with a screw 8. 9 is a cap that aesthetically hides screw 8. cover 18
The screw 17 also serves as a cover for aesthetic purposes and is fixed to the main body of the screw 17. Further, the mixed water outflow passage 4 opens into a cavity 5 that communicates with the mixed water passage 43.

FIG. 3 is a modification of FIG. 2, and the only difference is the control body unit 51. To explain only the difference, the insertion direction of the holder 28b is reversed. In other words, the bipiston 16 is in contact with the valve body 31b, and the protrusion 3 is in contact with the plate 12.
It is 0. Also, a stopper 7 provided on the collar portion 73 of the holder 28b and the open end side of the guide 29b.
2 prevents the holder 28b from falling off. The piston 16 is adapted to push against the center of the valve body 31b, and has a stepped, smaller diameter that extends through a small hole 74 in the center of the valve body 31b to form a guide shaft 76. A stopper 75 such as an E-ring is engaged with the guide shaft 76, and a spring 71 is biased between the stopper 75 and the cap 33. This spring 71 is the spring 32
After the valve body 31b is seated on the water side valve seat 38, the force of the spring 32 does not work and the piston 16 loses its urging force in the direction of contraction, and the wax type thermostat 15 is released from the holder 28b. It is sufficient that the actuating piston 16 inside the wax-type thermostat 15 is always kept in contact with the actuating piston 16 so that it does not fall off.

FIG. 4 is also a modification of FIG. 2, and the only difference is the control body unit 51. In order to prevent the holder 28a from falling off from the control body unit 51, a protrusion 30a of the holder 28a is used instead of the retaining ring 46 shown in FIG.
A small-diameter holding shaft 61 extends from the center of the shaft.
This extends through a hole 63 made in the center of the valve body 31a, and a groove is provided in the part after passing through.
A retaining ring 62 in the form of a ring is engaged. Also, the guide 29a of the holder 28a is connected to the cylinder 23.
It is not an integral part with the main body 1, but is held under pressure between the stopper 47 of the main body 1 and the end face of the cylinder 23.

FIG. 5 is a modification of FIG. 4, and differs mainly in the holding structure of the wax type thermostat. The piston 84 of the wax type thermostat 15c is extended, and a concave groove is provided in the piston 84 at the position where it contacts the plate 12c, and a retaining ring 85 like an E ring is engaged to receive force. It is further extended to form a holding shaft 87 and passes through a hole 101 in the center of the plate 12c. The retaining shaft 87 is designed so that it will not fall off the plate 12c or come into contact with the bottom of the bore 11 of the handle 6 when the piston 84 operates the actuation handle 6. Note that the tip of the holding shaft 87 is pushed toward the valve body 31c by a spring 86. This is the joint part 89, presser metal 8
8. The valve body 31c is kept in contact with the valve body 31c without separation or impact contact, which helps protect the contact area. Spring 86 is weaker than spring 32. Wax type thermostat 1
A convex cylindrical projection is provided at the opposite end of the piston 84 of 5c, and the pusher 8 replaces the projection 30a of FIG.
8 is press-fitted with this cylindrical protrusion to form a joint part 89.
Nasu. A small-diameter holding shaft 83 extends from the center of the pusher 88 and extends into the holding hole 81 that receives and guides the holding shaft 83 of the cap 33c. A rear concave groove is provided in the holding shaft 83 passing through the through hole 102 of the valve body 31c, and the retaining ring 82 is engaged with the E ring to prevent the wax type thermostat 15c from falling off from the control body unit 51. Therefore, the thermostat has the holding hole 81 and the plate 12.
It will be held and guided by the hole 101 of c.
Further, the guide 29c is held in the main body like the guide 29c in FIG. 4, but is used to limit the space between the wax type thermostat 15c and the guide 29c, that is, the mixed water passage 43.

The operation will be explained below based on examples.

In the case of FIG. 2, the control unit 51 is attached and detached unit by unit by opening and closing the rear cover 24. The retaining ring 46 and the pin 45 prevent the holder 28 and the wax type thermostat 15 from falling off and can be handled as one unit. Additionally, processing, checking, and confirmation of the control section can be performed on a unit-by-unit basis. Next, as a temperature adjustment operation, the temperature setting knob 7 is used to turn the handle 6 to set a predetermined temperature. By opening the mixed water outflow passage 4, water and hot water are supplied from the outside through the water passage 2 and the hot water passage 3, respectively. The respective inflows pass through a water inflow control port 35 and a hot water inflow control port 34, and the hot water flows through a hot water outflow port 41 into a mixing section 42 where they are mixed together. The mixed water then passes through the mixed water passage 43 to reach the inner cavity 5 and flows out from the mixed water outlet passage 4. When passing through the mixed water passage 43, the temperature of the mixed water is brought to the temperature of the heat sensitive part of the wax type thermostat 15, which is more compact than the conventional bimetal or bellows type thermostat. At this time, if the temperature of the mixed water is high, the wax expands and the piston 16
expands accordingly, but when the tip of the piston 16 contacts the plate 12 and extends further, the spring 32 is weaker than the relief spring 14, so the plate 12 remains in contact with the retaining ring 13 and does not move, causing the wax to The main body of the type thermostat 15 moves toward the valve body 31. At this time, since the support 44 is engaged with the holder 28, the holder 28
move in unison. Then, the valve body 31 is similarly moved integrally while being pushed by the protrusion 30 against the spring 32. As a result, the water inflow control port 35
opens, and the hot water inflow control port 34 closes accordingly. If it continues to expand, the valve body 31 will sit on the hot water side valve seat 39, and the hot water inflow control port 34 will be fully closed, preventing hot water from flowing in at all. In other words, the water inflow control port 35 is fully opened and only water flows in. If the piston 16 continues to extend after being seated in this manner, the relief spring 14 is bent and the plate 12 is moved back to protect the thermostat.

Conversely, if the temperature of the mixed water is low, the piston 16 will contract accordingly as the wax contracts. Assuming that the piston 16 and the plate 12 are already in contact, the valve body 31, protrusion 30, holder 28, and support 44 will contract together with the wax-type thermostat 15 under pressure from the spring 32, so that the hot water will Inflow control port 34
opens, and the water flow control port 35 closes accordingly. If it continues to contract, the valve body 31 will sit on the water side valve seat 38, and the water inflow control port 35 will be fully closed, preventing any water from flowing in. In other words, the hot water inflow control port 34 is fully opened and only hot water flows in. Even if the valve body 31 is seated in this manner and the wax continues to contract, the valve body 31 remains seated on the water side valve seat 38 by the spring 32. In other words, only the force of the spring 32 acts on the valve body 31. In this way, the temperature of the mixed water is controlled by expanding and contracting the piston 16 in accordance with the expansion and contraction of the wax, and increasing and decreasing the opening degrees of the water inflow control port 35 and the hot water inflow control port 34. The stable state is determined by the operation of the handle 6 on the plate 12.
The valve seat 31 is determined by the position of the piston and the amount of expansion of the piston depending on the temperature of the mixed water. This is when the opening degree of the water inflow control port 35 and the opening degree of the hot water inflow control port 34 become constant.

The case of FIG. 3 is similar, and only the different operation from the case of FIG. 2 will be explained.
Even after the wax-type thermostat 15 is seated on the water-side valve seat 38, it is constantly receiving a load from the spring 71, so the wax-type thermostat 15 is properly held in the holder 28b, and the pressure inside the wax-type thermostat 15 is maintained. This helps improve durability by preventing foreign matter from entering from the outside.

In the case of Fig. 4, the guide 29a is connected to the cylinder 2.
Since it is separate from the cylinder 23, materials and processing methods different from those for the cylinder 23 can be used, which is advantageous in terms of cost. Further, by using the holding shaft 61 and the retaining ring 62, the holder 28a is prevented from falling off from the valve body 31a, and as in FIG. 2, the main control section can be attached and detached as a control body unit 51 as a unit.

In the case of Fig. 5, as in Fig. 4, the holding shaft 8
3. By using the retaining ring 82, the main control section can be attached and detached as a control body unit 51 unit by unit. Further, since the piston 84 is extended to provide a holding shaft 87, the wax type thermostat 15c is held and guided by the hole 101 of the plate 12c and the holding hole 81. Therefore, the holder 28a in FIG. 4 can be omitted. Further, since the guide 29c only serves to form the mixed water passage 43, it is not required to be particularly strong. Therefore, it is advantageous in terms of cost. The valve body 31c is operated in the same manner as described above by transmitting force through the retaining ring 85 and pusher metal 88. Also spring 86
Since the connecting portion 89, pusher 88, and valve body 31c are always in contact with each other, there is no impact contact, which is useful for protecting the contact portion and increasing durability.

As described above, according to the present invention, the control body unit includes the wax type thermostat 15 and the valve body 31 operated by the wax type thermostat.
and a cylinder 23 in which the valve body 31 and a holder 28 holding the wax-type thermostat 15 are slidably housed, and the cylinder includes:
A cap 33 is formed with a water side valve seat 38 corresponding to one surface of the valve body, and a cap 33 having a hot water side valve seat 39 corresponding to the other surface of the valve body is screwed to one open end. Since the holder 28 is provided with a means to prevent it from coming off and can be handled as a single unit, the installation position can be determined naturally by simply inserting the holder 28 through the opening provided in the main body and closing the lid. In particular, a valve body 31 that performs sliding motion and a wax-type thermostat 15 are incorporated into the cylinder 2, which is immovably positioned within the main body, and a valve seat corresponding to the valve body is formed to extend inside the cylinder up to the valve opening. Since the lid of the main body only has the function of hermetically closing the entrance/exit of the unit, a simple screw-on lid with a gasket interposed may be sufficient, and the sliding surface of the valve body is provided directly inside the main body. There is no need for such operations, and work such as assembly, repair, and replacement of the main parts of the mixing faucet becomes extremely easy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a conventional example, and FIGS.
The drawings are cross-sectional views showing an embodiment of the present invention. 1... main body, 2... water passage, 3... hot water passage, 5
...bore, 15...wax type thermostat,
23: cylinder; 24: rear cover; 31: valve body; 36: hot water inlet; 37: cold water inlet; 51:
...Control unit.

Claims (1)

[Scope of utility model registration request] The mixing faucet main body 1 includes a support portion for slidably supporting the control body unit, an engaging portion for regulating the insertion position of the control body unit, and an entrance/exit for the control body unit provided with a removable tight-fitting lid 24. The control body unit includes a wax type thermostat 15, a valve body 31 operated by the wax type thermostat, and a holder 28 holding the valve body 31 and the wax type thermostat 15. and a cylinder 23 with a slidable interior,
A cap 33 is screwed into the cylinder, which has a water side valve seat 38 corresponding to the surface of the valve body 1 and a hot water side valve seat 39 corresponding to the other surface of the valve body at one open end, A mixing faucet characterized in that the other opening end is provided with means for preventing the holder 28 from coming off, so that it can be handled as a single unit.