JPS6333025Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a one-handle type hot water mixing faucet in which the mixing amount and discharge amount of hot water and water can be adjusted by operating one handle.

For example, a well-known mixer faucet called a Morne mixer faucet is
This type of device takes in hot water and water separately from a hot water inlet and a water inlet formed on the outer periphery of the cartridge cylinder, and forms a passageway through which the hot water and water are discharged from an outlet on the outer periphery of the cartridge cylinder. Insert the cartridge stem into the cartridge cylinder, and by sliding the cartridge stem, open and close the body passage, and by rotating the cartridge stem, hot and cold water can be opened and closed. The mixing amount, that is, the mixing temperature is adjusted. In such a configuration, the cartridge stem is provided with a cartridge to prevent the hot water or water in the passage from leaking to the outside of the cylinder through the gap between the cartridge stem and the cartridge cylinder. Seal rings are provided at both ends of the tray stem to seal the passage. In this case, these seal rings slide on the inner wall of the cartridge cylinder, but conventionally,
The problem is that scale accumulates on this seal ring, which increases sliding resistance and makes the handle difficult to operate.

This invention eliminates these conventional drawbacks and
It is an object of the present invention to provide a hot water/cold water mixing faucet that prevents the accumulation of scale on the seal ring portion and does not increase the sliding resistance of the handle. In order to achieve this, one or more grooves are formed in the circumferential direction on the outer periphery of the stem at a position closer to the seal ring than the seal ring between the outer periphery of the stem and the inner periphery of the cylinder. It is characterized by:

Below, the configuration of the present invention will be explained based on an illustrated embodiment. In FIG. 1, 1 indicates a faucet body 2.
A cartridge cylinder (hereinafter simply referred to as a cylinder) is fitted into the cylinder 1, and a hot water inlet 3 and a water inlet 4 facing each other in the diametrical direction are formed on the outer periphery at one location in the longitudinal direction of the cylinder 1. Correspondingly, a hot water inflow path 5 and a water inflow path 6 are formed in the faucet body 2, and these allow hot water and water to be introduced into the cylinder 1 separately. In addition, at other positions in the longitudinal direction of the cylinder 1, a hot water outlet 7 and a water outlet 8 that face each other in the diametrical direction are provided.
Correspondingly, a hot water outflow path 9 is formed in the faucet main body 2 to communicate with these outflow ports 7 and 8, and hot water and hot water flow in the middle of this hot water outflow path 9. The water is mixed and hot water is discharged from this part.

On the other hand, 10 is a cartridge stem (hereinafter simply referred to as stem) fitted inside the cylinder 1 so as to be slidable in the longitudinal direction and rotatable in the circumferential direction.
As shown in FIG. 3, this stem 1
0, the outer periphery of the inner fitting part is cut in an annular shape over a certain length, and the partition walls 11 protruding in the longitudinal direction are provided at opposing positions in the diametrical direction in this cut part. The outer periphery of the tube is covered with a cylinder 12, so that one side surrounded by the partition wall 11 and the cylinder 12 is defined as the hot water side flow path 13, and the other side is defined as the water side flow path. Furthermore, a hot water inlet 15 and a hot water outlet 16 corresponding to the hot water inlet 3 and hot water outlet 7 of the cylinder 1 are provided at both ends of the hot water side flow path 13. On both sides of 14, there is also a water inlet 4 of cylinder 1.
A water inlet 17 and a water outlet 18 corresponding to the water outlet 8 are formed. 10a is an operating handle mounting portion of the stem 10. Further, 19 indicates a sealing grommet fitted to each inlet port 3, 4 of the cylinder 1.

Therefore, the hot water and water entering from the respective inflow passages 5 and 6 of the faucet body 2 are transferred to the hot water side flow passage 13 and the water from the hot water inlet 3 and 15 and the water inlet 4 and 17 of the cylinder 1 and stem 10, respectively. The hot water is sent separately through the side channel 14, flows through the hot water outlet 7, 16 and the water outlet 8, 18 to the hot water outlet 9 of the faucet body 2, where it is mixed and discharged. That is, in this embodiment, the passage of the present invention formed in the cylinder 1 is a flow path that flows from the hot water inlets 3 and 15 of the cylinder 1 and the stem 10 to the hot water outlets 7 and 16 through the hot water side flow path 13. Similarly, from the water inlets 4 and 17 of the cylinder and stem 10, the water flows through the water side flow path 14 to the water outlet 8,
18. In this embodiment, when the stem 10 is slid leftward from the state shown in FIG.
and each inlet 3, 4 and outlet 7 of the cylinder 1,
Since the relative positional relationship in the axial direction with respect to the stem 10 is shifted, for example, the cylindrical body 12 of the stem 10 closes each inlet port 3, 4 of the cylinder 1, thereby closing the passage and stopping the discharge. On the other hand, as shown in Figure 1,
When the stem 10 is slid to the right, the passage is opened and hot water is discharged. In the state shown in FIG. 1, the stem 10 is rotated, and the stem 10 and the hot water inlets 3, 15, hot water outlets 7, 16, water inlets 4, 17, and water outlets 8, 18 of the cylinder 1 are connected to each other. , by changing the inlet area and outlet area of each,
Temperature is controlled by adjusting the amount of hot water and water flowing out.

Now, in the above configuration, the stem 10 is
As shown in the figure, O-rings 22 and 23 as seal rings of the present invention are fitted into grooves 21 and 21 formed on the outer periphery of the stem at both ends of the water side flow path 14 and hot water side flow path 13, respectively. These O-rings 22 and 23 are attached in sliding contact with the inner circumferential wall of the cylinder 1 to prevent hot water or water on the passage side from leaking from both ends of the cylinder 1. However, these O-rings 2
2 and 23, and the O
In the vicinity of the rings 22 and 23, the inlet 15,
One groove 24 is formed in the circumferential direction at the end on the 17 side, and two grooves 25, 25 are formed in the circumferential direction at the other outlet 16, 18 side. O on both ends of the O
This prevents the accumulation of scale on the rings 22 and 23. That is, even if scale adheres to the sliding portion between the stem 10 and the cylinder 1, it will be scraped off by these grooves 24 and 25 and will accumulate in the grooves 24 and 25, so that it will not be removed. Therefore, scale does not adhere to and accumulate on the O-rings 22, 23, and therefore the sliding resistance of the O-rings 22, 23 does not increase.

In the above configuration, grease may be filled in one of the two grooves 25, 25 formed on the outlet ports 16, 18 side. In addition, in this embodiment, one groove 24 is also formed on the inlet ports 15 and 17, but according to past experience, the outlet port 1
There are overwhelmingly many cases where the sliding resistance increases due to the accumulation of scale on the O-ring 23 part on the 6, 18 side, so even if the groove 24 on the inlet port 15, 17 side is omitted, In terms of reducing sliding resistance, a sufficient effect can be obtained.

As described above, according to the present invention, the groove formed near the seal ring between the outer periphery of the stem and the inner periphery of the cylinder is closer to the passage than the seal ring.
Since scale is prevented from adhering to the seal ring side, there is no increase in sliding resistance on the seal ring due to the accumulation of scale, which is the case with conventional methods, and the effect is that it can be operated easily over a long period of time. can get. In addition, in Japan, the supply pressure on the water side is generally higher than the supply pressure on the hot water side, so the high pressure on the water side pushes the stem against the inner circumferential wall of the cylinder on the hot water side, causing a kind of distortion. However, when the grooves are formed, water or hot water enters the grooves, and the stem as a whole can be expected to have a balancing effect against the above-mentioned twisting due to the pressure.

[Brief explanation of the drawing]

Fig. 1 is an overall longitudinal cross-sectional view showing the installation state of the hot water mixing faucet of the present invention, Fig. 2 is a perspective view of the cartridge stem, and Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 1. be. 1... Cylinder, 10... Stem, 13... Hot water side channel, 14... Water side channel, 22, 23... O ring, 24, 25... Groove.

Claims (1)

[Scope of utility model registration request] A stem is slidably and rotatably inserted into the cylinder to form a passage through which hot water and water entering from the outer periphery of the cylinder pass through the cylinder and protrude from the outer periphery of the cylinder, and the stem is slidably operated. The above-mentioned passage is opened and closed by means of a cylinder, and the mixing amount of hot water and water is adjusted by rotating the stem.A seal ring is provided on the outer periphery of the stem between the outer periphery of the stem and the inner periphery of the cylinder. A hot water mixing faucet characterized in that one or more grooves are formed in the circumferential direction at a position near the seal ring closer to the passage.