JPH018771Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hot water mixer faucet with a hand shower equipped with a shower device.

[Conventional technology]

Conventionally, as a hot water mixing faucet installed in bathrooms etc.
Generally, a shower device is installed by connecting a shower hose to a spout that supplies mixed water to the bath.

Such a mixing faucet is equipped with a valve mechanism that switches the flow path to the shower side and the bath side so that mixed water can be selectively discharged, but when the flow path to the spout side is opened and water is discharged to the bath, There was a problem in that air was sucked in from the shower head, causing noise when discharging water.

As a solution to this problem, for example,
As shown in Japanese Patent No. 29223, there is a structure in which a check valve is provided in the flow path near the shower head to prevent air from flowing in when water is discharged from the bus side.

When using a shower, if you open the flow path on the shower side by operating the bath/shower switching valve on the mixer faucet, the water discharge pressure will open the check valve and allow water to be discharged. When the valve is closed, the check valve closes due to the drop in discharge water pressure. Regardless of the presence or absence of such a check valve, mixed water will remain in the hose leading to the shower head after the switching valve is closed, and in cold regions, the flow path to the shower head must be closed to prevent freezing. Water must be excluded.

However, in those equipped with a check valve, the valve does not open unless the discharge pressure from the mixing faucet is applied, so it is impossible to discharge the accumulated water. Furthermore, even in a configuration without a check valve, the shower-side discharge chamber of the mixer faucet is cut off from the outside world and cannot be supplied with air, so complete water cannot be drained even if the shower head is positioned at a low level.

As mentioned above, conventional hot and cold mixer faucets with hand showers cannot drain water from the flow path between the mixer faucet's switching valve and the shower head, and are prone to freezing accidents and are unsuitable for use in cold regions. .

[Problem that the invention attempts to solve]

The purpose of this invention is to prevent backflow from the shower head to the primary side in a hot water mixer faucet with a hand shower in which the shower head is connected to the main body of the hot water mixer faucet via a hose, and to prevent water from flowing in the flow path between the mixer faucet and the shower head. The purpose is to make it possible to easily eliminate.

[Means for solving problems]

In order to achieve the above objectives, the hot water mixer faucet with hand shower of the present invention has a switching valve inside the main body, and the switching valve switches the flow path to the spout side and the shower head side. The mixing faucet is connected to the main body with a joint that communicates with the flow path from the switching valve and connects the proximal end of the hose of the hand shower, and the joint has an inlet port connected to the main body; It has a three-way opening structure including an outflow port for connecting the hose and an auxiliary port formed approximately coaxially with the outflow port. Equipped with a check valve that opens by
A water drain valve body for draining water from the internal flow path is disposed in the auxiliary opening so as to be movable in its axial direction, and an operating member that can be operated from the outside by connecting the water drain valve body is connected to the auxiliary port. The draining valve body has a protrusion that is screwed into the opening and has a distal end extending toward the check valve and a proximal end formed with a large diameter portion that engages with the inner wall of the auxiliary opening and functions as a stopper. The operating member further includes a communication hole that communicates the auxiliary opening of the joint with the outside, and rotates the protruding shaft of the water drain valve body in the reverse direction by rotating the operating member. It is characterized by being able to open the valve by hitting it against the stop valve.

[Effect]

With the above means, even if a check valve is disposed between the hot water mixing faucet and the shower, the water drain valve body and the check valve body can be opened by simply rotating the operating member from the outside, Moreover, the inside of the flow path can be opened to the outside through the communication hole of the operating member. In addition, by making the proximal end of the protruding shaft of the water draining valve body a large diameter part and engaging it with the inner wall of the auxiliary opening, even if the operating member is operated away from the joint,
The large diameter portion functions as a stopper and can prevent the water drain valve body and the operating member from falling off.

〔Example〕

The present invention will be explained below based on embodiments shown in the drawings.

Figure 1 is a sectional view showing the main parts of a hot water mixer faucet, Figure 2
The figure is a sectional view taken along the - line arrow in FIG. 1.

A water handle 2 and a hot water handle (not shown) are arranged at the top of both ends of the main body 1 of the hot water mixing faucet,
Hot water and water are supplied to the mixing chamber 3 at the center of the main body 1 by operating both handles, and this mixed water is selectively flowed down to the spout 5 on the bath side and the shower side by the switching valve 4. This switching valve 4 has first and second valve bodies 7, 8 linked to a switching handle 6 protruding forward from the main body 1, with a spring 9 interposed between the two valve bodies 7, 8, and the switching handle 6 can be rotated. As a result, both valve bodies 7 and 8 are in the closed state shown, only the first valve body 7 is open and the second valve body 7 is in the closed state as shown in the figure.
Only the valve body 8 can be open.

10 is a substantially T-shaped joint fixed to the back of the main body 1 and communicating with the mixing chamber 3;
It has an inlet part A connected to the inlet part A, an outlet part B formed perpendicularly to the axis of the inlet part A, and an auxiliary port part C formed coaxially with the outlet part B. This joint 10 is fixed via a packing 11 with a rear cap nut 12 positioned at an arbitrary angle. 13 is a shower hose connected to this joint 10 by a connecting fitting 14 and a cap nut 15, and a shower head 17 having a water sprinkling hole 16 at its tip.
is installed.

A water draining mechanism M is provided at the auxiliary port C of the joint 10, but this is connected to the check valve 1 disposed at the outflow port B.
The check valve 18 is opened from the outside and the inside of the flow path is opened to the outside so that water can be discharged. First, the check valve 18 will be explained.

The check valve 18 is a unit type, and has a cylindrical case 1.
A spider-shaped spring receiver 20 is provided at the upper end of the valve 9, and a check valve seat 21 is provided at the lower end.

Reference numeral 22 denotes a check valve body that approaches and separates from the check valve seat 21 via a packing 23, and a guide rod 24 that extends upward.
is guided by the hole 25 of the spring receiver 20 to move up and down, and furthermore, a spring 26 is arranged to bias the check valve body 23 in the valve closing direction.

In this check valve 18, the check valve body 22 rises and opens against the spring 26 due to the discharge pressure caused by the opening of the first valve body 7 of the switching valve 4, and when the first valve body 7 closes, the check valve body 22 opens. The valve is closed to prevent air from entering from the shower head 16.

The water draining mechanism M includes a cap nut-shaped operating member 31 that is screwed onto the outer periphery of the auxiliary opening C of the joint 10 and can move forward and backward in the direction of the check valve 18, and one end of which is loosely engaged with the operating member 31. The main element is a drain valve body 32 that is fitted into the drain valve 10 and opens and closes the inside and outside of the flow path. The operating member 31 has a hole 33 for loosely inserting the water draining valve body 32 and a communication hole 34 for draining water and sucking air in the center of the side surface of the head.

The water draining valve body 32 is inserted through the hole 33 and supported by a retaining ring 35, and a gasket 36 is placed in the middle to seal the valve so that it can be closed. It's distracting. Further, as shown in FIG. 2, the portion supported by the joint 10 has a substantially elliptical shape with a part of the peripheral surface cut out, and a gap 38 can be formed between it and the inner peripheral surface of the joint 10. There is. The base end of the water drain valve body 32 has a large diameter, and by engaging this with the inner peripheral wall of the auxiliary opening C, the water drain valve body 32 can be prevented from coming off from the joint 10. Further, the rotation of the operating member 31 is restricted so that it does not fall off, and the operation can be performed easily even when the draining mechanism M is located at the back of the main body 1 as shown in the figure. The peripheral surface of the operating member 31 is preferably knurled or the like so that it can be easily rotated by hand.

In the above configuration, when the first valve body 7 is closed, water accumulates in the flow path between the downstream side of the first valve body 7 and the shower head 16, but in order to remove this, the operating member 31 must be rotated. The water drain valve body 32 is moved in the direction of the closed check valve 18. As a result, the protruding shaft 37 pushes up the check valve body 22 to open the check valve 18 as shown in FIG.
1 packing 36 separates from the inner peripheral surface of the joint 10,
The inside of the flow path communicates with the inside of the operating member 30 through the gap 38 . Therefore, the water accumulated in the flow path flows out from the communication hole 34 of the operating member 31 at the lowest level, and the water can be quickly drained. In this case, air is supplied from the water sprinkling holes 16 of the shower head 14.

In addition, if the mounting position of the joint 10 is upside down from that shown in FIG. For example, this communication hole 34 functions as an air suction hole. Therefore, when the shower head 17 is brought to a low level position, the water in the flow path is discharged from the water sprinkling hole 16 of the shower head 17, and water can be drained in the same way.

As described above, the communication hole 34 functions as a water drain hole for draining residual water and an air suction hole depending on the mounting orientation of the joint 10, and water can be drained with a simple operation.

[Effect of idea]

This invention allows for easy opening of the check valve and discharge of residual water by simply rotating the operating member;
) Since the communication hole of the operating member functions as a hole for draining water and supplying air, the effect is that water can be drained regardless of the mounting orientation of the joint. In addition, the large diameter part of the water draining valve body is formed at the base end of the protruding shaft so that it does not slip out from the auxiliary opening, so the auxiliary member connected to it will not fall off, and the water draining process will be easier. There is no need to lose or reassemble parts during installation.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main parts of the hot water mixer faucet with hand shower according to the present invention, and Figure 2 is the same figure as shown in Figure 1.
FIG. 3 is a cross-sectional view taken along the line, showing a state in which the check valve is opened by displacement of the water draining valve body, and the inside of the flow path is communicated with the outside. 1...Body, 10...Coupling, 13...Shower hose, 18...Check valve, 22...Check valve body, 2
6...Spring, 31...Operation member, 32...
Drainage valve body, 34...Communication hole, 37...Protruded shaft, A
...Inflow port, B...Outflow port, C...Auxiliary port, M...Drainage mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] A hot water mixing faucet with a hand shower that has a switching valve inside the main body and switches the flow path to the spout side and the shower head side by the switching valve, wherein the flow from the switching valve is A joint that communicates with the main body and connects the proximal end of the hose of the hand shower is connected to the main body, and the joint has an inlet port that connects to the main body, an outlet port that connects the hose, and a joint that connects the base end of the hose of the hand shower. It has a three-way opening structure including an auxiliary port formed substantially coaxially with the outlet, and a check valve that is opened by the water pressure of water flowing from the switching valve toward the hose at the outlet, A water draining valve body for draining water from the internal flow path is disposed in the auxiliary opening so as to be movable in the axial direction thereof, and an operating member that can be operated from the outside by connecting the water draining valve body is connected to the auxiliary opening. The draining valve body has a protrusion that is screwed into the opening and has a distal end extending toward the check valve and a proximal end formed with a large diameter portion that engages with the inner wall of the auxiliary opening and functions as a stopper. The operating member further includes a communication hole that communicates the auxiliary opening of the joint with the outside, and rotates the protruding shaft of the water drain valve body in the reverse direction by rotating the operating member. A hot water mixer faucet with a hand shower that can be opened by abutting against a stop valve.