JPS6231744Y2 - - Google Patents

Description

[Detailed description of the invention] This invention selectively switches the hot water valve that opens and closes the hot water flow path, the water valve that opens and closes the water flow path, and the mixed water flow path to the bath spout side and the shower side. The present invention relates to a hot water mixing faucet equipped with a switching valve.

Hitherto, this type of hot water mixer faucet has been known to have various structures; for example, the one shown in Fig.
There is one in Publication No. 90131.

To explain this, a check valve c is provided on the upstream side of the water valve b and the hot water valve (not shown), and the valve body corresponds to the valve seat from the secondary side. A switching valve d is provided downstream of the hot water valve. Since the switching valve d is normally provided with its bath side and shower side valve bodies on the primary side of the valve seat, the check valve c is provided on the upstream side of the water valve b and the hot water valve. In this case, after opening the hot water valve and the water valve and adjusting their opening degree (mixing ratio of hot water and water) and discharging from the bath spout or shower part, operate the operation shaft of the switching valve d. If the bath side valve and shower side valve were both closed, and the hot water valve and water valve were closed in this state, the switching valve could no longer be operated. In other words, the spindles of the hot water valve and water valve enter the valve housing, but the hot water inside cannot escape to the outside because there is a check valve on the upstream side and a bath side valve and shower side valve on the downstream side. The internal pressure inside the valve housing, which has become a closed chamber due to the switching valve and check valve, increases, and the water pressure causes the bus side valve body and shower side valve body, which are provided on the primary side of each valve seat, to strongly press against their respective valve seats. If the operating shaft was forcibly operated in this state, there was a risk that the switching valve would malfunction.

To prevent failure of this switching valve, remove the check valve installed upstream of the hot water valve and water valve to prevent the spindle of the hot water valve and water valve from entering the valve casing. It would be better to let the hot water escape to the upstream piping, but eliminating the backflow prevention function in the mixer faucet is a sanitary problem, so a check valve is necessary. The technical problem that this invention aims to solve is that after opening the hot water valve and the water valve and discharging the mixed water from the bath spout or shower part, both the bath side valve and the shower side valve are closed. In this state, the hot water valve,
A check valve is installed at a position where the increased pressure inside the valve housing caused by the entry of the spindle of the hot water valve and water valve into the valve housing when the water valve is closed can be released to the upstream side. be.

The technical measures taken to solve the above technical problem are: a hot water flow path, a water flow path, and a mixed water flow path that communicates with both of these flow paths and also connects to the bath spout and shower section. A hot water valve and a water valve each have a valve body that approaches and separates from the valve seat as the spindle advances and retreats to open and close the hot water flow path and the water flow path, and a mixed water flow path. A bus side valve that opens and closes the bus spout side, a shower side valve that opens and closes the shower side, and both the bus side valve and the shower side valve close together in conjunction with the bus side valve body and the shower side valve body, or either of them. A switching valve is provided with an operating shaft that opens one of the valves, and a partition wall is provided between the hot water valve and the water valve and the switching valve, respectively, and a secondary valve seat is provided between the valve seat and the valve seat formed on the partition wall. It is equipped with a check valve that has a corresponding valve body from the side.

In this hot water mixing faucet, a partition wall is provided between the hot water valve, the water valve, and the switching valve, respectively, and the valve body is made to correspond to the valve seat formed on the partition wall from the secondary side. By providing a check valve, even if backflow occurs from the shower spout or bath spout, the check valve can prevent the backflow from flowing upstream. Even though they are equipped with valves, if the hot water valve and water valve are closed while both the bath side valve and shower side valve are closed, the valve casing of the spindle of the hot water valve and water valve As the hot water inside the valve casing is allowed to escape to the upstream side, an increase in the pressure inside the valve casing in the above case can be prevented.

Therefore, even if the hot water valve and the water valve are closed with both the bath and shower side valves closed, the internal pressure inside the valve housing will rise and the water pressure will cause the valve bodies on the bus and shower sides to close. It will not be pressed too hard against the valve seat and become inoperable.

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

Check valves are provided between the hot water valve, the water valve, and the switching valve, that is, on the secondary side of each of the hot water valve and water valve, so even if only the hot water valve is opened and used The hot water that has passed through the water valve is prevented from entering the upstream side by the water side check valve, and the water is stored between the water valve and the water side check valve.
The body part on the water side does not get hot and is safe.

Hereinafter, embodiments of this invention will be described based on the drawings.

As shown in FIG. 1, the valve housing A is provided with a hot water valve a and a water valve b on both sides thereof, and inflow pipes 7 and 7' are connected to both sides of the back side, respectively.

Inside the valve casing A, the mixed water flow path 1 on the primary side passes through the hot water valve a and the water valve b from the opening edges of the inflow pipes 7 and 7', respectively.
A hot water flow path 8 and a water flow path 8' leading to the inside are formed, and a mixed water flow path 1 is formed from the hot water valve a and the water valve b.
Check valves c and c' are provided in the middle of the flow path to 1, respectively.

The hot water valve a and the water valve b are arranged in the hot water flow path 8 and the water flow path 8', respectively, and the valve seat 35 is formed in the middle of the flow paths 8 and 8' to correspond to the hot water flow path 8 and the water flow path 8'. Valve body 3
Reference numeral 6 is provided at the tip of a spindle 37 that moves forward and backward by screwing into an opening 34 formed in the valve housing A opposite to the valve seat 35, and the spindle 37 is moved forward and backward by rotating a handle 38 provided at the outer end of the spindle 37. As the valve seat 35 approaches and separates from the valve seat 35, the valve opens and closes.

The check valves c and c' are arranged on the downstream side of the hot water valve a and the water valve b, respectively. A valve seat 39 is provided on a partition wall 44 that partitions the water flow path 8' and the mixed water flow path 1, and the valve body 40 is connected to the valve seat 39.
A spring 43 is loaded between the back surface of the valve body 40 and a lid 42 that closes an opening 41 formed in the valve housing A opposite to the valve seat 39.
Always energized in the valve closing direction.

In addition, inside the valve housing A, there is a secondary side mixed water flow path 11 that communicates from the primary side mixed water flow path 1 to the bus discharge port 9 connected to the center of the bottom surface of the valve housing A, and a secondary side mixed water flow path 11 that communicates from the mixed water flow path 1 on the primary side to the bus discharge port 9 connected to the bottom center of the valve housing A. A mixed water flow path 12 on the secondary side communicating with the shower section 10 connected to the center of the back side is formed.

The mixed water flow path 1 on the primary side is formed approximately at the center of the flow path of the valve housing A, that is, between the hot water flow path 8 and the water flow path 8' and the mixed water flow paths 11 and 12 on the secondary side. Ori,
Valve seats 2 and 2' for the bus side and the shower side of the switching valve d are provided on both sides of the flow path 1, facing each other.

Valve seat holes 13 and 13' are formed in the valve seats 2 and 2', respectively, to communicate the mixed water flow path 1 on the primary side and the mixed water flow paths 11 and 12 on the secondary side, respectively.

An operating shaft 3 equipped with operating means is inserted into the mixed water flow path 1 on the primary side from the outside of the valve housing A.

The operating shaft 3 has a structure in which an operating shaft 14 and a spindle 15 are connected as shown in FIG.

The actuating shaft 14 is screwed into a boss 17 that is watertightly screwed into the center of the front surface of the valve casing A via a gasket 16, and an engaging portion 18 is formed at the tip of the boss 17 on the mixed water flow path 1 side on the primary side.

A gasket 19 is fitted between the other end of the actuating shaft 14 and the boss 17 to make it watertight, and the handle 20 is fitted to the other end of the actuating shaft 14 by protruding outward from the valve housing A.

The handle 20 is an operating means for the operating shaft 3, and is fixed to the operating shaft 14 with a screw 21, and its rotation operates the switching valve d.

The spindle 15 protrudes from the valve seat hole 13 on the bus side into the mixed water flow path 1 on the primary side, has a large diameter at its tip, and has an annular groove 22 in the middle to fit a packing 23 such as an O-ring. .

Backup springs 23' made of fluorine resin, etc. are provided before and after the gasket 23.
to prevent deformation.

The spindle 15 has each valve seat 2 of the mixed water flow path 1,
Valve bodies 4 and 4' are slidably attached in correspondence with valves 2' to constitute a bus side valve _d1 and a shower side valve _d2 .

The valve bodies 4, 4' have a structure in which outer cylinders 25, 25' are screwed onto inner cylinders 24, 24' which engage with the spindle 15, respectively.

The inner cylinders 24, 24' are connected to the guides 31, 3 in the mixed water channels 11, 12 on the secondary side from the valve seat holes 13, 13', respectively.
1' protrudes, and a locking part 2 is attached to the outer periphery of the valve seat 2, 2' side.
6, 26' are formed protrudingly.

The rear end of the inner cylinder 24 of the bus side valve body 4 is the operating shaft 1.
The inner cylinder 24' of the shower-side valve body 4' adjacent to the engaging portion 18 of
5 into sliding engagement.

The outer cylinders 25, 25' have a larger diameter on the valve seat 2, 2' sides, respectively, and have concave notches 28, 28' on the side end surfaces.
form.

The rear end of the outer cylinder 25' of the shower valve body 4' projects inward to form an engagement edge 29 with which the tip of the spindle 15 abuts and engages.

The locking portions 26, 24' provided on the inner cylinders 24, 24'
6' and the recesses 28, 25' provided in the outer cylinders 25, 25'
Between the 8' and the sheet packing 6, made of synthetic rubber,
6' is fitted.

The seat gaskets 6, 6' are integrally formed with annular protrusions 30, 30' that protrude toward the valve seats 2, 2', respectively.

Although there is one protrusion 30, 30' in the drawing, there may be two protrusions, and the cross-sectional shape may also be semicircular, triangular, or triangular.
The shape of the constraint is arbitrary.

Further, a spring 5 is installed between the outer cylinders 25 and 25' to press the valve bodies 4 and 4' outward, respectively.

Therefore, the protrusions 30, 3 of the seat gaskets 6, 6'
0' is in close line contact with the seating surfaces of the valve seats 2, 2'.

When switching the switching valve d, first turn the handle 20 clockwise from the closed state shown in FIG. is the inner cylinder 24 of the bus side valve body 4
The valve body 4 is pushed forward along the spindle 15.

As the valve body 4 moves, its protrusion 30 separates from the seating surface of the bus side valve seat 2, and the bus side valve _d1 opens, and the primary side mixed water flow path 1 and the secondary side mixed water flow path 1 are separated.
1 and the mixed water is discharged from the bath discharge port 9.

On the other hand, the spring 5 is compressed by the forward movement of the bus-side valve body 4, and the shower-side valve body 4' is pressed against the shower-side valve seat 2'.
0' is brought into closer contact with the seating surface of the valve seat 2' to maintain watertightness between the mixed water flow path 1 on the primary side and the mixed water flow path 12 on the secondary side.

Next, when the handle 20 is turned counterclockwise from the closed state, the operating shaft 3 rotates and retreats, and the tip of the spindle 15 touches the engaging edge 25 of the outer cylinder 25' of the shower-side valve body 4'. The valve body 4' is engaged with the bus side valve body 4 to draw the valve body 4' toward the bus side valve body 4 side.

Due to the movement of the shower side valve body 4', the protrusion 3
0' separates from the seating surface of the shower-side valve seat 2', and the shower-side valve _d2 opens, and the primary mixed water flow path 1 and the secondary mixed water flow path 12 communicate with each other, and water flows from the shower section 10 to the shower. Mixed water is supplied.

At this time, the spring 5 of the valve body 4 of the bus side valve d ₁ is compressed by the backward movement of the shower side valve body 4', and its protrusion 30 is brought into closer contact with the seating surface of the valve seat 2, and the valve body 4 of the bus side valve d 1 is moved closer to the primary side. The mixed water flow path 1 and the secondary side mixed water flow path 11 are kept watertight.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the hot water mixing faucet of the present invention with a part cut away, Fig. 2 is a longitudinal sectional side view of the same, Fig. 3 is an enlarged longitudinal sectional side view of the switching valve portion, and Fig. 4 is a longitudinal sectional side view showing the switching valve part. FIG. 2 is a sectional view of main parts of a conventional example. In the figure, A...Valve housing, a...Hot water valve, b...Water valve, c, c'...Check valve, d...Switching valve, _d1 ...Bus side valve, _d2 ... ...Shower side valve, 1, 11, 12...
...Mixed water channel, 4...Bus side valve body, 4'...Shower side valve body, 8...Hot water channel, 8'...Water channel, 9...Bath spout, 10... Shower section,
35...Hot water valve, water valve seat, 36...Hot water valve, water valve body, 37...Spindle, 39...
... Valve seat of check valve, 40 ... Valve body of check valve, 44...
...partition wall.

Claims (1)

[Scope of utility model registration request] A valve housing has a hot water flow path, a water flow path, and a mixed water flow path that communicates with both of these flow paths and also communicates with the bath spout and shower section, and the valve body moves into the valve seat as the spindle advances and retreats. A hot water valve and a water valve that come into contact with and separate from each other to open and close the hot water flow path and the water flow path, a bath side valve that is provided in the mixed water flow path and opens and closes the bath outlet side of the mixed water flow path, and a shower section. A switching valve comprising a shower side valve that opens and closes the side, and an operating shaft that is linked to the bus side valve body and the shower side valve body and closes both the bus side valve and the shower side valve or opens either one of them. A check valve is provided in which a partition wall is provided between the hot water valve, the water valve, and the switching valve, respectively, and a valve body is made to correspond to the valve seat formed on the partition wall from the secondary side of the valve seat. A hot water mixing faucet.