JPS5829433B2 - metered water faucet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metering faucet that discharges a fixed amount of water and automatically stops the discharge.

Hitherto, various types of metering faucets have been known, such as the one shown in Figs.
There is one published in Publication No. 0.

To explain what is shown in FIGS. 7 to 8, there is a main body A having an inlet 1, a water outlet 2, and a flow path 4 that connects these two, and an on-off valve a provided in the middle of the flow path 4. , an impeller 18 provided in the flow path 4 on the downstream side of the on-off valve a and rotated by running water, and an impeller 18 interlockingly connected to the impeller 18 via a speed reduction mechanism 17, and a curved cam surface 16a on the outer peripheral surface. The bottom surface provided by cutting out the cam surface 16a is the cam surface 16.
a water volume setting cam 16 having a concave notch 16b gently continuous with the water volume setting cam 16; a valve shaft 13 having one end corresponding to the outer peripheral surface of the water volume setting cam 16 and the other end linked to the opening/closing valve a; and the water volume setting cam 16. When one end of the valve shaft 13 is in contact with the cam surface 16a of the water amount setting cam 16, the on-off valve a is opened, and when the valve shaft 13 falls into the recessed part 16b, the on-off valve a is opened. This is a metering faucet that closes, and a water volume setting cam 16 is fixed to the inner end of a handle shaft 21, and an operating handle 25 provided with a scale is fixed to the outer end of the handle shaft 21, respectively.

Therefore, if you accidentally rotate the operation handle 25 in the opposite direction when setting the water amount, the recessed part 16 of the water amount setting cam 16
b engages with the valve stem 13 and an unreasonable force is applied to the retaining portion,
There is a risk that the cam 16 and valve shaft 13 may break.

In order to prevent breakage of the cam 16 and valve stem 13, it is conceivable to provide a ratchet structure in the middle of the handle shaft 21 that transmits rotation in only one direction but not in the opposite direction. If this happens, the alignment between the scale on the operating handle 25 and the cam 16 will be misaligned, making it impossible to set the amount of water.

The technical problem of the present invention is to solve the above problems by transmitting only the rotation of the operating handle in the forward direction to the handle shaft, and preventing the rotation in the opposite direction from being transmitted to the handle shaft, and separating the scale from the operating handle. The object of the present invention is to link the control handle to the operating handle so that it is not linked to rotation in the opposite direction, but only to rotation in the forward direction.

The technical measures taken to solve this technical problem consist of a main body having an inlet, a water outlet, and a flow path that connects these two eyes, an on-off valve provided in the middle of the flow path, and A blade wheel is provided in the flow path on the downstream side and is rotated by the flowing water, and the blade wheel is connected to the blade wheel via a reduction mechanism, and a curved cam surface is provided on the outer peripheral surface and a cutout is provided in this cam surface, and the bottom surface is a cam surface. A water volume setting cam having a concave notch that is gently continuous on its surface, a valve shaft whose one end corresponds to the outer circumferential surface of the water volume setting cam and whose other end is linked to the opening/closing valve, and an operation for rotating the water volume setting cam. The metering water faucet is a metering water faucet comprising: an opening/closing valve that opens when one end of the valve shaft is in contact with a cam surface of a water volume setting cam; and a closing valve that closes when the water falls into the recessed part; A handle shaft that interlocks and communicates with the cam shaft of the water volume setting cam, an operation handle that is rotatably provided with respect to this handle shaft, and a handle that is interposed between the above-mentioned operation handle shaft and the operation handle and that is not rotatable on the handle shaft. A scale plate having a large number of ratchet teeth attached and continuously formed in an annular shape on a surface facing the operating handle, and a ratchet of the scale plate that is provided so as to be freely retractable into a housing hole drilled in the operating handle and is operated by a spring. a pin biased in the direction of pushing the ratchet teeth, and an upright surface with which the pin engages the ratchet teeth in the forward rotational direction of the handle;
It is formed of an inclined surface that slopes downward from the upper end of this upright surface in the forward rotation direction of the handle.

Therefore, when the operating handle is rotated in the direction of use, the pin is locked to the upright surface of the ratchet teeth and rotates the handle shaft and camshaft via the scale plate, but when the operating handle is rotated in the opposite direction, the pin The operating handle will slip over the slope of the ratchet teeth, making it impossible to rotate the scale plate. Even if you accidentally rotate the operating handle in the opposite direction, the alignment between the scale plate and the water volume setting cam will be disrupted. Otherwise, the water volume setting cam may rotate in the opposite direction and the cam or valve shaft may break due to the engagement of the recessed part with the valve shaft, or excessive force may be applied to the water volume function part, causing it to break or malfunction. There's nothing to do.

Since the present invention is constructed as described above, it has the following effects.

■ When setting the amount of water, when the rotation angle of the scale is large, with the conventional scaled handle, it was necessary to grasp the handle many times and rotate the scaled handle little by little, which was troublesome, but with the present invention, While holding the handle, turn the operating handle slightly in the forward direction to rotate the scale plate a little, then turn the operating handle in the opposite direction to idle, and then turn the operating handle slightly in the forward direction again to rotate the scale plate slightly. Just repeat the procedure, and the water volume setting operation can be easily performed.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.

A in the figure is a main body, and an inlet 1 and a water outlet 2 are provided.

3 is a water spout pipe connected to the water spout 2 in a swingable manner.

Reference numeral 4 denotes a flow path that connects the inlet 1 and the water outlet 2, and the flow path is divided into a main flow path 4a and a bypass path 4b in the middle thereof.

Reference numeral 5 denotes a valve seat formed at the inlet of the main flow path 4a, and a piston valve body 6 corresponds to the valve seat 5, forming an on-off valve a.

The on-off valve a opens and closes the main flow path 4a, and its piston valve body 6 slides on the inner peripheral surface of the lid I screwed onto the main body A.
A pressure chamber 8 is formed behind the piston valve body 6 by the valve body 6 and the lid 7.

The pressure chamber 8 communicates with the primary side of the flow path 4 through a small hole 9 bored in the piston valve body 6, and communicates with the main flow path 4a, which is the secondary side of the flow path 4, through an IJ valve. has been done.

The relief valve body 10 of the relief valve is always biased in the valve closing direction by a spring 12, and its valve shaft 13 is slidably inserted into the cylindrical guide 11 of the piston valve body 6, and its tip is in the mainstream. It projects into the channel 4a.

Reference numeral 14 denotes a drain groove formed on the outer periphery of the valve shaft 13 along its axial direction, and allows water in the pressure chamber 8 to flow out to the main flow path 4a.

A retaining ring 15 is attached to the outer periphery of the flat end of the valve shaft 13, and corresponds to the lower end of the cylindrical guide 11.

This retaining ring 15 comes into contact with the cylindrical guide 11 as the IJ-F valve body 10 is displaced upward (7), and the piston valve body 6 is pushed up via this guide 11.

Reference numeral C denotes a water metering function section, which is constructed by interconnecting a water rate setting cam 16, a reduction gear train 17, and a blade wheel 18, and is made of synthetic resin such as polyacecool resin, and is attached to the casing B as necessary. It is housed in the main body A and is attached to the main body A in a cartridge type manner.

The water amount setting cam 16 has a shape in which a concave notch 16b is provided in a part of a curved cam surface 16a, and is fixed to a cam shaft 19 and disposed in the main flow path 4a directly below the on-off valve a.

As the cam 16 rotates, the cam surface 16
a comes into contact with the lower end of the valve shaft 13 of the IJ IJ-F valve body 10, and pushes up the shaft 13 against the elastic force of the spring 12 to open the IJ I
When the J-F valve is opened and approximately rotated, the spring 1
The elastic force of 2 causes the valve shaft 13 to fall from the terminal end of the cam surface 16a into the recessed part 16b, thereby closing the IJ valve.

On the other hand, the camshaft 19 has a gear 20 pivotally attached to one end thereof, and a final gear 17n of the reduction gear train 17 to the other end.

The gear 20 is a handle shaft 2 that constitutes an operating section d, which will be described later.
1, the rotation of the handle shaft 21 is transmitted to the cam shaft 19, and the water amount setting cam 16 is rotated.

The final gear 17n of the reduction gear train 17 is attached to the camshaft 19 via frictional attachment means and the gear train 1
The rotation from 7 is transmitted to the camshaft 19, but on the contrary, the rotation from the handle shaft 2 is transmitted to the camshaft 19.
The rotation of the camshaft 19 accompanying the rotation operation of gear train 1
7 will not be informed.

On the other hand, the first gear 17a of the reduction gear train 17 meshes with a gear 24 pivotally attached to the rotating shaft 23 of the impeller 18.

The impeller 18 is fixed to the rotating shaft 23 and the water amount setting cam 16
It is arranged so as to block the main flow path 4a on the downstream side, and rotates when receiving the water flowing through the main flow path 4a, and rotates the rotating shaft 23 and the gear 2.
Make sure to rotate 4.

Therefore, the rotation of the impeller 18 is reduced by the reduction gear train 17 and transmitted to the camshaft 19 and the water amount setting cam 16.

Then, an operating section d, which operates the water flow function section C to set the water flow rate, is communicated.

The operating part d communicates with the water metering function part C via the ratchet part e, and only the rotational operation of the operating part d in the usage direction is transmitted to the water metering function part C by the ratchet part e. , when operating part d is operated in the opposite direction, operating part d moves idly.

A scale plate 26 is provided between the operating handle 25 and the handle shaft 21, and is configured to transmit the rotation of the operating handle 25 to the water metering function section C.

The scale plate 26 is connected to the handle shaft 21 by spline fitting so as to rotate together with the shaft 21, and ratchet teeth 27 are continuously formed in an annular shape on the front surface on the operating handle 25 side.

The ratchet teeth 27 are shaped to have an upright surface 27a and an inclined surface 27a that becomes lower than the upright surface 27a in the direction in which the operating handle 25 is used, so that a pin 28 provided on the operating handle 25 engages with the ratchet teeth 27. ing.

The pin 28 is housed in a housing hole 29 formed in the operation handle 25 so as to be able to come out and go out, and the pin 28 is attached to the scale plate 2 by a spring 30.
It is biased toward the 6th side.

Therefore, the ratchet portion e is formed by the ratchet teeth 27 of the scale plate 26, the pin 28 of the operating handle 25, the spring 30, and the like.

When the operating handle 25 is rotated in the direction of use, the pin 28 is engaged with the upright surface 27a of the ratchet teeth 27, and the rotation of the handle 25 is transmitted to the scale plate 26. The shaft 21 rotates.

On the other hand, when the operating handle 25 is rotated in the opposite direction, the pin 2
8 climbs over the inclined surface 27b of the ratchet tooth 27, the handle 25 moves idly, and its rotation is not transmitted to the scale plate 26.

Therefore, the handle shaft 21 does not rotate.

In the figure, f is a water stop valve provided in the flow path 4 upstream of the on-off valve a, and g is a manual on-off valve provided on the bypass path 4b.

The manual on-off valve g is used to normally turn on and off water without using the on-off valve a, and is used to open and close the flow path that bypasses the main flow path 4a in the flow path 4 and connects to the bypass path 4b. I'll do what I do.

The manual on-off valve g may not be provided.

Therefore, in order to discharge a fixed amount of water from such a metering faucet, first turn the operation handle 25 in the direction of use.

When the handle 25 rotates, the rotation causes the scale plate 26 to rotate via the ratchet portion e, and this rotation is also transmitted to the handle shaft 21, causing the shaft 21 to rotate.

Then, the rotation of the handle shaft 21 is transmitted to the cam shaft 19 via the gears 22 and 20, and the cam 16 rotates to rotate IJ IJ.
- Push up the valve body 10 against the spring 12 to open the relief valve.

With the opening of this IJ-F valve, the water in the pressure chamber 8 flows to the main flow path 4a, and the pressure in the chamber 8 becomes equal to atmospheric pressure, thereby increasing the water pressure and the retaining ring 15 of the relief valve body 10. By pushing up the cylindrical guide 11, the piston valve body 6 is smoothly pushed up, and the on-off valve a is opened.

As the on-off valve a opens, the main flow path 4a opens, water flows into the flow path 4a, and is discharged from the water discharge pipe 3.

At this time, the impeller 18 is rotated by the water flowing through the main channel 4a, and the rotation is decelerated by the reduction gear train 17 and transmitted to the camshaft 19, and the rotation of the cam 16 is continued to maintain the open state of the on-off valve a. At the same time, the scale plate 26 also moves to the cam 16.
It rotates with the rotation of.

Then, after a predetermined period of time has elapsed, the cam 16 rotates within a predetermined angular range, so that the valve shaft 13 of the relief valve body 10 falls from the cam surface 16a of the cam 16 into the recessed part 16b, and the relief valve is closed. A flow path 4 is formed in the pressure chamber 8 through a small hole 9.
- Water from the next side flows in, and as the piston valve body 6 gradually descends as the water flows in, the on-off valve a slowly closes and water discharging is automatically stopped.

In other words, the total water spouting time is determined by the rotation angle of the cam 16 that rotates together with the scale plate 26, and the smaller the initial rotation amount of the operating handle 25, the greater the water spouting amount.
The higher the amount, the less water will be discharged.

On the other hand, if the user accidentally turns the operating handle 25 in the opposite direction, only the handle 25 rotates idly due to the ratchet part e, and the scale plate 26 and the handle shaft 21 do not rotate.

Therefore, the alignment between the scale plate 26 and the cam 16 is not disturbed, the cam shaft 19 and the cam 16 do not rotate in the opposite direction, and the valve shaft 13 of the relief valve body 10 is inserted into the recessed part 16b of the cam 16. When engaged, the cam 16 and the reduction gear train 17
, the valve stem 13, etc., and damage to the water metering function part e can be prevented.

Also, in this example, a single faucet type metering faucet was shown, but
It is also optional to apply this method to a fixed-rate faucet of the hot/cold mixer faucet type.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing the water faucet of the present invention, Fig. 2 is a partially cutaway front view of the faucet, Fig. 3 is a cross-sectional view taken along line mm in Fig. 2, and Fig. 4 is an IV in Fig. 2. 5 is an enlarged sectional view taken along line V--IV in FIG. 4, and FIG. 6 is an exploded perspective view of the operating section. FIG. 7 is a vertical cross-sectional view showing an example of a conventional metering faucet.
FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7. In addition, in the figure, A... Main body, a... On-off valve,
d...Operation unit, 1...Inflow port, 2...
...Spout, 4...Flow path, 13...
・Valve shaft, 16...Water amount setting cam, 16a...
...Cam surface, 16b... Concave notch, 17...
...Reduction mechanism (reduction gear train), 18...
・Blade wheel, 19...camshaft, 21...handle shaft, 25...operation handle, 26...
...Scale plate, 27...Ratchet tooth, 27a
...Elevating surface, 27b... Slope surface, 28
...Pin, 29...Accommodation hole, 30...
····spring.

Claims (1)

[Claims] 1. A main body having an inlet, a water outlet, and a flow path that connects these two ports, an on-off valve provided in the middle of the flow path, and a main body that is provided in a flow path downstream of this on-off valve and rotates by flowing water. The blade is interlocked and connected to the impeller via a speed reduction mechanism, and has a curved cam surface on the outer peripheral surface and a recessed part provided by cutting out this cam surface and whose bottom surface gently continues with the cam surface. a valve shaft having one end corresponding to the outer circumferential surface of the water volume setting cam and the other end being linked to the opening/closing valve; and an operating section for rotating the water volume setting cam, one end of the valve shaft being connected to the opening/closing valve. When the water volume setting cam is in contact with the cam surface, the on-off valve opens.
This metering faucet has an on-off valve that closes when the water falls into a recessed part, and the operation part includes a handle shaft that is linked and connected to the cam shaft of the water volume setting cam, and an operation handle that is rotatably provided with respect to the handle shaft. a scale plate interposed between the handle shaft and the operating handle, non-rotatably attached to the handle shaft, and having a large number of continuous ratchet teeth formed in an annular shape on a surface facing the operating handle; It is equipped with a pin which is provided in a housing hole bored in the handle so as to be freely retractable and which is biased by a spring in the direction of pushing the ratchet teeth of the scale plate, and the pin engages the ratchet teeth in the forward rotation direction of the handle. A fixed-rate faucet, characterized in that it is formed by a rising surface that fits together and an inclined surface that slopes downward from the upper end of the rising surface in the forward rotation direction of the handle.