JPH0242947Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a hot water mixer faucet with a temporary water stop function that is attached to the horizontal deck surface of a vanity or unit bath, etc., and mixes hot and cold water and discharges it, or sprays the mixed water as a shower. It is related to.

As is well known, a hot and cold water mixer faucet with a temporary water shutoff function has a water supply faucet connected to the water supply pipe and a hot water supply faucet connected to the hot water supply pipe, which are installed symmetrically and integrally, and the handle on the faucet side and the hot water supply faucet on the hot water faucet side. The degree of mixing of water and hot water is adjusted by operating the respective handles, and mixed water at an appropriate temperature can be discharged from the spout pipe provided in the mixing pipe section connecting the water supply faucet and the hot water supply faucet. Generally, the mixed water discharge line can be switched to the shower hose side by operating a lever provided on the mixing pipe. Some switching valves have not only a switching function but also a water shutoff function. In other words, by operating the switching valve, you can stop the water without having to operate the faucet or hot water tap, and once you have adjusted the hot water/water mixture ratio, you can adjust it every time you use it. At least by using the switching valve to shut off the water, mixed water at an appropriate temperature can always be spouted. However, when a hot/cold water mixer faucet has a shower switching valve with a water shutoff function, when the water is shut off, water may flow into the hot water piping due to the difference in water pressure between the hot water supply side and the water supply side. In order to prevent water from flowing into the water pipes, it is necessary to equip each water supply faucet and hot water supply faucet with a check valve.

A check valve is also required to prevent wastewater from flowing back into the water pipes during a water outage.

Conventionally, in hot water mixing faucets installed on horizontal deck surfaces such as bathroom vanities and bathroom units, the check valve is connected to the bottom of a short pipe below deck a, protruding further downwards, as shown in Figure 4. However, if you do this, the check valve b occupies the space under the deck, so if you take a bathroom vanity as an example, the storage space for items will become narrower, installation work will be difficult due to the narrow space, and the hot water mixer faucet will be difficult to install. Also, there were drawbacks such as difficulty in replacing or repairing the check valve when it broke down. Furthermore, in the case of bathroom units, the opening for maintenance under the deck surface is narrow, making installation work difficult, and in the event of a breakdown, it is difficult to replace or repair. Also, Utsukai Showa 55-
As shown in Publication No. 40246, some hot and cold water mixer faucets were equipped with a check valve in the mixing pipe, but in this case the check valve's mounting cap, spring adjustment screw, etc. were exposed to the surface, making it unsightly. At the same time, there was a drawback that it was easy for mischief to be done, such as removing the mounting cap needlessly.

The purpose of this invention is to provide a hot water mixing faucet that has an excellent design because the mounting cap of the check valve is not exposed and does not impair the aesthetic appearance, and at the same time can be constructed compactly and make effective use of the space under the deck. It is something to do. In order to achieve this purpose, the present invention provides a check valve at the inlet communicating with the water supply tap of the hot water mixing faucet and the valve seat of the hot water tap, and forms a valve seat opposite to the check valve in the pipe. A pair of short pipes are directly screwed and connected to the outer periphery of the inlet, respectively, and the short pipes are passed through the deck, and a flange formed on the outer periphery of the short pipes and a fastener screwed to the short pipes are connected. The deck is clamped with a nut, and a water supply pipe and a hot water supply pipe are respectively connected to the lower end of the short pipe.

Next, an embodiment of the present invention will be described with reference to the drawings.
First, to explain the outline of the structure of this hot water mixer faucet itself, this hot water mixer faucet consists of a faucet 1R and a hot water faucet 1.
2R is a handle for opening and closing the water tap 1R, and 2L is a handle for opening and closing the hot water tap 1L. Since the hydrant 1R and the hot water tap 1L have the same configuration, only the hot water tap side will be explained below. At the same time, a four-pronged guide piece 7 is fixed to the check valve 5 with screws 6, and the guide piece 7 is connected to the inner circumference of the inflow hole 3. By slidingly contacting the surface, the check valve 5 is made to slide straight through the inlet. Reference numeral 8 denotes a horizontal mixing pipe section formed on opposing sides of the water supply faucet 1R and the hot water supply faucet 1L, connecting the respective outlet ports, and switching valves 9 and 10 having a water shutoff function are provided in the center of the mixing pipe section 8. It is being That is, the bonnet 11 is screwed onto the central front wall of the mixing pipe section 8 in a watertight manner, the spindle 12 is inserted into the bonnet, and the screw groove 13 formed on the outer periphery of the spindle 12 is inserted into the inner periphery of the bonnet 11. A lever 14 is fixed to the outwardly projecting end of the spindle 12 with a screw 15, and the switching valves 9 and 10 are attached to the inner small diameter portion 16 of the spindle 12 so as to be able to move forward and backward in the axial direction. Thread it through a skewer. 17 is a small nut screwed onto the inner end of the spindle 12 to prevent the switching valve 10 from coming off;
Reference numeral 8 denotes a flange portion formed on a part of the spindle 12 to restrict the axial movement of the switching valve 9.
The switching valves 9 and 10 have bamboo-shaped stepped portions formed on their outer peripheral surfaces, which are covered by metal protective tubes 19 and 20, and both ends of which are engaged with the stepped outer peripheral surfaces of the protective tubes 19 and 20, and a coil spring 21 is inserted into the switching valves 9 and 10. is interposed in a compressed state. 2
Reference numeral 2 denotes a discharge pipe for discharging mixed water to the front face of the hot water mixing faucet, and the discharge pipe 22 is rotatably attached to the upper surface of the central portion of the mixing pipe portion 8 with a cap nut 23. Further, 24 is a shower hose connecting pipe rotatably attached to the back of the central portion of the mixing cylinder portion 8 with a cap nut 25. As shown in the figure, when the lever 14 is positioned upward, the switching valve 9 closes the valve seat 26 communicating with the discharge pipe 22 by the elasticity of the coil spring 21, and the switching valve 10 closes the valve seat 26 communicating with the discharge pipe 22.
Similarly, the elasticity of the coil spring 21 closes the valve seat 27 that communicates with the valve seat 27 . Then, when the lever 14 is turned to the right and the spindle 12 is advanced inward, the flange portion 18 presses the switching valve 9 to separate the switching valve 9 from the valve seat 26. The heated mixed water is discharged into the discharge pipe 22. On the other hand, when the lever 14 is turned to the left and the spindle 12 is retreated outward, the small nut 17 presses the switching valve 10 and pushes the switching valve 10 from the valve seat 27.
The mixed water in the mixing pipe section 8 flows in the direction of the shower hose connection pipe 24 to separate them from each other, so that a shower-like water spray is obtained from a shower water spout (not shown).

30R and 30L are the upper end large diameter parts 29R and 29L
A valve seat 31 facing the check valve 5 is formed in the short pipes 30R and 30L.
Moreover, flanges 32R, 32L are formed on the outer periphery of the short pipes 30R, 30L, and
L penetrates the deck 28, and the flanges 32R and 32L are brought into contact with the surface of the deck 28, and the tightening nuts 33R and 33L are screwed onto the outer peripheries of the short pipes 30R and 30L from the bottom of the deck 28 to secure the deck. 28 to these flanges 32R, 32L and tightening nuts 33R, 33
Clamp with L. 34R, 34L are flange 3
Rubber gaskets interposed on the clamping surfaces of 2R and 32L,
36R and 35L are washers interposed between the clamping surfaces of the tightening nuts 33R and 33L. 36 is water pipe,
37 is a hot water supply pipe, each of which is a short pipe 30R, 30
The short pipes 30R, 30L are inserted into the pipe L from the lower end, and are connected watertightly by tightening cap nuts 38R, 38L screwed onto the lower ends of the short pipes 30R, 30L.

Another embodiment of the present invention, in which only the essential parts are shown with the same reference numerals as in FIG. 1 in FIG. By forming this structure, the built-in position of the check valve 5 is located below the surface of the deck 28, and the height of the handle 2L overhanging the deck 28 can be made lower than in the above embodiment. However, by doing this, the space on the deck 28 is saved and at the same time the appearance is improved.

In addition, although the above embodiment describes a hot water mixing faucet in which a switching valve with a water shutoff function is provided in the mixing pipe section, the present invention is applicable not only to this type of hot water mixing faucet but also to a hot water mixing faucet that does not have a water shutoff function. It can be applied to those equipped with a switching valve or a simple hot water mixing faucet without a switching valve, as well as a single lever type hot water mixing faucet and a hot water mixing faucet equipped with a thermostat.

As explained in the above embodiments, according to the present invention, the mounting cap of the check valve, etc., is not exposed on the hot water mixer faucet itself, making it possible to simplify the appearance and at the same time prevent unnecessary tampering. . That is, in this mounting structure, a check valve is provided in the inlet of the hot water mixing faucet, and a short pipe in which a valve seat facing the check valve is formed is directly screwed onto the outer periphery of the inlet. The check valve can be inspected only by unscrewing the short pipe and is difficult to operate from the outside, so unnecessary mischief can be prevented, and the structure can be simple and aesthetically pleasing. Moreover, since it is compact, it does not take up a large amount of space under the deck and has beneficial effects such as being able to utilize the space under the deck.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially sectional front view, and FIG. 2 is a sectional view taken along the line -- in FIG. FIG. 3 is a sectional view of essential parts showing another embodiment of the present invention. FIG. 4 is a sectional view of a main part showing a conventional example. 1R...Water tap, 1L...Hot water tap, 3...Inflow port, 5...Check valve, 8...Mixing pipe section, 9, 10...
...Switching valve, 22...Discharge pipe, 24...Shower hose connection pipe, 28...Deck, 30R, 30L...
...Short pipe, 31...Valve seat, 32R, 32L...Flange, 33R, 33L...Tightening nut, 36...
Water piping, 37...Hot water piping.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A water supply faucet with an inlet connected to a water supply pipe and an inlet connected to a hot water supply pipe formed on the underside, respectively, and a hot water mixer faucet having a hot water supply faucet in a vanity or a bathroom unit, etc. A check valve is provided in each of the inflow ports communicating with the valve seats of the water supply faucet and the hot water supply faucet, and a valve seat opposite to the check valve is formed in the pipe. A pair of short tubes formed by the above-mentioned short tubes were directly screwed and connected to the outer periphery of the inlet, respectively, and the short tubes were passed through the deck and screwed to a flange formed on the outer periphery of the short tubes. Clamp the deck with a tightening nut,
A hot water mixing faucet characterized in that a water supply pipe and a hot water supply pipe are respectively connected to the lower end of the short pipe. 2. Utility model registration claim No. 1 characterized in that the built-in position of the check valve is located below the deck surface by forming the valve seat in the short pipe so as to be located below the flange thereof. The hot water mixing faucet described in item 1.