JPS641580Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a hot water mixer faucet that adjusts the mixing ratio of hot water and cold water using a single lever handle to obtain the appropriate amount of hot water. This invention relates to the seat structure of a valve mechanism.

[Conventional technology]

In general, this type of hot water mixing faucet has an outer casing 1 equipped with a hot water chamber B, a cold water chamber C, and a faucet D communicating with a valve chamber A, and a case 2 inside the valve chamber A, as shown in FIG. For example, a rotary lid 5 that is fitted into the upper end of the case 2, and a hot water chamber rotor of the outer casing 1 that is fitted and locked into the lower part of the case 2. , and a bottom plate 4 provided with inlets 4', 4' and an outlet 4'' respectively communicating with the cold water chamber C,
It penetrates the rotary lid 5, its middle part engages with the lower end of the lever 9 supported by a pin 9', rotates together with the rotary lid 5, and slides back and forth along the lower surface of the rotary lid. A movable disk 7 having a movable guide plate 6 and a mixing chamber 7' in the center thereof, which engages with the guide plate 6 and performs the same operation as the guide plate, and the bottom plate 4.
A fixed disk 8 comprising an inlet 4', 4' and an outlet 4'', and an inlet 8', 8' and an outlet 8'' which communicate with each other are sequentially installed in a superposed manner, and the valve The valve mechanism inserted into the chamber is held on the seat surface by a retaining ring 3 screwed onto the upper end of the valve chamber.
It can be held down in any direction.

In the figure, reference numerals 11 and 12 indicate packings interposed on the upper and lower surfaces of the bottom plate 4, and 14 indicates an O-ring between the guide plate 6 and the movable disk 7.

[The problem that the idea aims to solve]

The hot water mixer faucet of the conventional structure described above serves as a means for preventing leakage of hot water and cold water flowing into the inlets 4' and 8' of the two disks and mixed water flowing out from the outlets 4'' and 8''. Packings 11 and 12 are attached to the upper and lower surfaces of the bottom plate 4 to surround the inlet 4' and outlet 4'', and O-rings 14 are attached between the movable disk 7 and the guide plate 6, and a presser ring is attached. 3, the case 2 is pressed, and the packings 11 and 12 are compressed between the fixed disk 8, the bottom plate 4, and the seat surface A' of the valve chamber A.

Therefore, at least the packing 12 on the lower surface of the bottom plate is located between the lower end surface of the case 2 and the seat surface of the valve chamber.
Because of this, when tightening with the presser ring 3, the above-mentioned packings are often excessively compressed beyond their elastic limits, which causes the packing to become compressed under high temperature conditions. There were problems that could not be solved simply by improving the machining accuracy of the parts, such as premature aging and water leakage.

[Means to solve the problem]

Therefore, the present invention provides a hot water mixing faucet in which the case of the valve mechanism having the above-mentioned structure can be pressed into contact with the seat surface of the outer casing via a retaining ring in the valve chamber of the outer casing.
The above-mentioned problem is solved by protruding a plurality of pairs or a plurality of inverted conical resistance pins at equal intervals on the lower end surface of the case.

[Effect]

In the hot water mixer faucet with the above configuration, the tip of the resistance pin on the bottom of the case buckles slightly under the normal tightening force of the retaining ring, and a predetermined gap can be maintained between the bottom plate and the valve chamber seat surface. This has a special effect in that excessive pressure on the packings attached to the upper and lower surfaces is limited.

〔Example〕

Hereinafter, the hot and cold mixer faucet of the present invention will be described in more detail based on one embodiment shown in Figs. It has an outer casing 1 equipped with a hot water chamber B, a cold water chamber C, and a faucet D, and valve mechanisms 2, 4 to 12 in which a bottom plate 4 is fitted and locked in the lower part of the case 2. This is a hot water mixing faucet in which a movable disk 7 operated by operating a lever handle 10 freely adjusts the opening amounts of inlets 4', 8' and outlets 4'', 8''. (Denoted with the same reference numerals as in FIG. 3 above) Reference numeral 13 denotes a resistance pin that is integrally projected from the lower end surface of the case 2 made of hard plastic or the like, and has a height corresponding to the thickness of the packing 12 on the lower surface of the bottom plate 4. It has an inverted conical shape.

Generally, it is preferable that the resistance pins 13 protrude from the lower end surface of the case 2 at equal intervals, but as shown in FIG. They may be provided at different locations, in which case they should be arranged symmetrically.
Further, the case 2 including the resistance pin 13 is usually integrally molded of hard synthetic resin, but the resistance pin may be made of metal that can buckle a certain amount when pressed.

In the figure, 2' indicates a recess cut out at the lower end of the case 2, and 4a indicates a protrusion that is formed on the outer edge of the bottom plate and can be tightly fitted into the recess 2'.

[Effect of idea]

According to the seal structure of the main case related to the above composition,
When the retaining ring 3 is screwed onto the outer casing 1 with a constant tightening force and the case 2 is pressed against the seat surface A' of the valve chamber A,
Along with this, the resistance pins 13, 13 on the bottom of the case...
The tip of the seat contacts the seat surface A′ and buckles slightly.
The packing 12 on the lower surface of the bottom plate 4 is compressed to a necessary and sufficient degree to maintain watertightness, but beyond that, excessive compression of the packing 12 is limited,
As a result, the packing 11 is also spared from excessive pressure caused by the tightening of the presser ring 3.

Therefore, the packings 11 and 12 are always maintained at a moderate compression within the elastic limit, preventing aging and ensuring watertightness of the parts over a long period of time.

Furthermore, according to the valve mechanism of the present invention, even if the watertightness of the packings 11 and 12 deteriorates due to long-term use, the holding ring 3 can be pressed against the case 2 with even greater tightening force. Since the conical tips of the resistance pins 13, 13... of the case 2 are further buckled and lowered, each of the above-mentioned packings is further compressed by a certain amount, and an emergency retightening effect can be obtained. As a sealing structure for a stopper, a remarkable practical effect is exhibited.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the center of the hot water mixing faucet of the present invention, FIG. 2 is a top view of the valve mechanism thereof, and FIG. 3 is a longitudinal cross-sectional view of the center of the conventional hot water mixing faucet. In addition, in the figure, 1...outer casing, 2...case, 3...pressing ring, 4...bottom plate, 5...rotating lid, 6...guiding board, 7...movable disk, 8...fixed disk,
9...Rice lever, 10...Lever handle, 11,
12...Packing, 13...Resistance pin.

Claims (1)

[Scope of utility model registration request] At the bottom of the case of the valve mechanism, which is built into the valve chamber of the outer casing and allows the opening amounts of the inlet and outlet to be adjusted using a single lever handle, there is packing surrounding the inlet and outlet. In a hot water mixing faucet in which bottom plates provided on the upper and lower surfaces are inserted and locked, and the bottom plates are pressed onto the valve chamber seat surface through the case with a presser ring, a plurality of or a plurality of pairs are provided on the lower end surface of the case. A hot water mixing faucet characterized by a protruding inverted conical resistance pin.