JPS6231743Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water control device that can be used to prevent backflow, adjust flow rate, stop water supply, etc. in a faucet such as a hot water mixing faucet.

For example, in a hot water mixing faucet, as shown in Figure 1, a crank-shaped water supply pipe b is connected to the faucet body a.
A water control device c has conventionally been installed in the middle of the water supply system to prevent backflow, adjust the flow rate, and stop the water supply. The structure of this water control device c is also disclosed in Japanese Utility Model Publication No. 55-27718, and a cylindrical body d is screwed onto the outer vertical wall forming a right-angled bent portion, and the cylindrical body d is
An adjustment shaft e is screwed into the inside, a shaft portion h of a top-shaped valve body g is loosely fitted into a vertical hole f of the adjustment shaft e, and the valve body g is attached to a valve seat formed on the inner wall of the water supply pipe b. It is made to face J. However, the water control device configured like this,
Although the stroke of the valve body g can be changed by adjusting the screwing amount of the adjustment shaft e, there is a drawback that the adjustable range of the stroke is narrow. In other words, with this configuration, if you try to lengthen the stroke, you have to make the cylinder d and the adjustment shaft e protrude a lot forward, but if they protrude a lot, the rotation of the spanner used to tighten the connecting nut k of the stopper body a will be affected. It got in the way. Therefore, the range in which the stroke can be adjusted has to be narrow, and this narrow range has the disadvantage that the range in which the flow rate can be adjusted is narrow. Also,
In general, if foreign objects such as rust or metal pieces get stuck in the gap between the valve body g and the valve seat j, and the foreign objects are caught in the gap between the valve body g and the valve seat j, the valve seat j may also be damaged. If seat j was scratched or worn, the entire water supply pipe b had to be replaced. In other words, if the valve seat j is even slightly scratched and its adhesion is impaired, backflow prevention must work from a sanitary standpoint even when the water pressure difference between the primary and secondary sides is small. However, since it no longer works, the entire water supply pipe b has to be replaced, which poses a problem in that the replacement cost increases.

The present invention was developed to solve the above problems, and includes an outflow pipe that is bent in a direction substantially perpendicular to the inflow pipe, and an adjustment shaft that moves back and forth on an axis concentric with the outflow pipe within the intersection of the outflow pipe. A tool engagement groove is formed on the outer end surface of the adjusting shaft that is screwed together and exposed to the outside, and a cylindrical part provided to move forward and backward integrally with the adjusting shaft is surrounded by an inflow pipe side and a cylindrical part. A horizontal hole communicating with the inside of the cylindrical part is provided, and a valve element biased toward the inflow side by a coil spring is disposed in the outflow pipe, and the valve element is opposed to the valve seat at the tip of the cylindrical part. This is a water control device for a faucet, characterized by:

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, regarding a wall-mounted hot water mixer faucet shown in FIGS. 2 and 3. In Fig. 2, 1 is a hot water tap that can be opened and closed using a hot water supply handle 2, 3 is a hydrant that can be opened and closed using a water supply handle 4, 5 is a hot water pipe connected to the hot water tap 1, and 6 is a hydrant. A water supply pipe connected to section 3, and 7 indicate a hot water mixing discharge pipe. A cross section of the water supply pipe 6 is shown in FIG. 3, and the water supply pipe has an inflow pipe 9 that projects perpendicularly from the wall surface 8 and an outflow pipe 10 that is perpendicular to the wall surface 8. A threaded port 11 is formed on the wall facing the threaded port 11, and a cylinder body 12 with both ends open and threaded grooves formed on the inner and outer circumferences is screwed into the threaded hole 11 in a watertight manner by interposing an O-ring 13. An adjustment shaft 14 is screwed into the adjustment shaft 12 so as to move forward and backward on an axis concentric with the outflow pipe 10. The adjustment shaft 14 is watertightly provided with an O-ring 15 interposed between it and the inner peripheral surface of the cylinder 12, and a linear tool engagement groove 16 is formed in the outer end surface protruding from one end of the cylinder 12. . Around the cylindrical part 17 formed integrally with the adjustment shaft 14, there is a wall on the inflow pipe 9 side and the cylindrical part 17.
A horizontal hole 18 is formed to communicate with the inside, and a valve seat part 19 is formed at the tip of the cylindrical part 17.
Fits watertightly. On the other hand, a narrowed part 21 having a small diameter is formed on the inner wall surface of the outflow pipe 10, and one end of the coil spring 22 is fixed to the narrowed part 21,
The tripod-shaped guide member 24 shown in FIG. The valve seat portion 19 is opposed to the valve seat portion 19. Note that 26 is a cap that covers the outwardly protruding portion of the cylindrical body 12. Further, the same water control device is provided in the hot water supply pipe 5 as well.

In the water control device configured in this manner, the valve body 23 is separated from the valve seat portion 19 due to the water pressure flowing in from the inflow pipe 9 side, and water flows through the valve body 23 . The amount of water flowing through the guide member 24 is limited to a certain level or less by the tip of the guide member 24 coming into contact with the narrowing portion 21 . In addition, the maximum water flow rate at that time is the adjustment shaft 14.
The movable range of the valve body 23 is adjusted by moving the valve seat portion 19 forward and backward by screwing the valve body 19, so that the movable range of the valve body 23 can be adjusted as desired. At this time, when water pressure is applied from the outflow pipe 10 side, the valve body 23
9 to prevent backflow. Further, the adjusting shaft 14 is further screwed into the guide member 2 as shown in FIG.
If the tip of the valve body 2 is brought into constant contact with the constriction part 21, the valve body 2
3 can also be in constant contact with the valve seat portion 19 to completely block water flow.

FIG. 6 shows another embodiment of the present invention,
The adjustment shaft 14 and the cylindrical portion 17 are formed separately, and a connecting shaft 28 protruding from the rear end surface of the cylindrical portion 17 is loosely fitted into a vertical hole 27 bored at the center of the adjustment shaft 14. Adjustment shaft 1
4 and insert the inner bent portion 30 into the vertical hole 27.
By arranging the adjustment shaft 14 in such a manner that it is located in the constriction portion 31 of the connecting shaft 28, the rotation of the adjustment shaft 14 is not transmitted to the cylindrical portion 17, and only its forward and backward movement is transmitted to the cylindrical portion 17. It was made into
According to this configuration, since the valve seat portion 19 does not rotate during adjustment, it is possible to prevent the closing function from deteriorating due to a change in the close contact with the valve body 23 due to rotation. In addition, in the water control device shown in FIG. 7, the valve body 23
The core shaft 32 and outflow pipe 1 are constructed using frame packing.
It is loosely inserted into the bearing 33 formed in 0,
The other configurations are the same as those in FIG. Although the above embodiment illustrates an example in which the inflow pipe and the outflow pipe are bent in orthogonal directions, the bending angle does not necessarily have to be exactly at right angles, and it is of course applicable to a certain range of bending angles. be.

As explained above, the present invention is a water supply pipe or a hot water supply pipe in which an inflow pipe and an outflow pipe intersect in a substantially orthogonal manner, and the adjustment shaft is screwed into the intersection so as to move forward and backward on an axis concentric with the outflow pipe. A valve seat is formed at the tip of a circular tubular portion integrally provided with the adjustment shaft, and the flow rate adjustment function can be achieved by moving the adjustment shaft forward and backward and moving the valve seat. ing.
For this reason, when a water supply faucet is installed through a crank-shaped water supply pipe protruding from a wall as shown in the example, the flow rate is adjusted by moving the adjustment shaft back and forth in a direction parallel to the wall. Even if the stroke is large, the adjustment shaft does not protrude forward to a large extent, which facilitates the installation work without interfering with tightening the connecting nut of the plug body. In addition, if the valve seat becomes damaged or worn and needs to be replaced, the adjustment shaft can be simply replaced instead of replacing the entire water supply pipe as in the past, making repairs easy and cost-effective. There are other beneficial effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional hot water mixer faucet, Fig. 2 is a front view of a hot water mixer faucet equipped with a water control device according to the present invention, and Fig. 3 is a line A-A in Fig. 2. FIG. 4 is an enlarged cross-sectional view, FIG. 4 is a diagram of its operating state, FIG. 5 is a perspective view of a guide member of a valve body, and FIGS. 6 and 7 are longitudinal sectional views of a water control device showing other embodiments of the present invention. It is. 9... Inflow pipe, 10... Outflow pipe, 14... Adjustment shaft, 16... Tool engaging groove, 17... Cylindrical part, 1
8... Horizontal hole, 19... Valve seat, 22... Coil spring, 23... Valve body.

Claims (1)

[Scope of utility model registration request] An outflow pipe is formed which is bent in a direction substantially perpendicular to the inflow pipe, and an adjustment shaft that moves forward and backward on an axis concentric with the outflow pipe is screwed into the intersection of the outflow pipe, and a tool is attached to the outer end surface of the adjustment shaft exposed to the outside. A lateral hole is provided around the cylindrical part, which forms an engagement groove and is provided to move forward and backward integrally with the adjustment shaft, to communicate between the inflow pipe side and the inside of the cylindrical part, and furthermore, a horizontal hole is provided in the outflow pipe to communicate with the inside of the cylindrical part. 1. A water control device for a faucet, characterized in that a valve element biased toward the inflow side by a coil spring is disposed, and the valve element is opposed to a valve seat portion at the tip of the cylindrical portion.