JPH0217065B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a metering faucet configured to automatically close after discharging a set amount of water.

[Prior art]

Conventional metering faucets have an operating handle fixed to the water volume setting shaft, and the operating handle is rotated in a predetermined direction from the water stop position to set the water discharge amount, and the valve is closed by operating according to the discharge amount. The water metering function section has a mechanism to automatically stop discharging water after discharging water.

Metering faucets are used for a variety of purposes, but it is necessary to determine the maximum amount of water to be discharged depending on the area of use, in order to prevent unnecessary discharge of water.
In other words, when storing water in a bathtub, by setting the maximum water flow rate of the metering faucet to the optimum water level capacity for the bathtub, accidents such as water overflowing from the bathtub can be prevented no matter who operates the faucet. Can be done. As means for setting the maximum water discharge amount, there are methods described in Japanese Utility Model Application No. 58-49070 and Japanese Utility Model Application No. 58-50277.

In the former publication, the rotation angle of the dial is determined by attaching and detaching a stopper pin that regulates the rotation angle at the required circumferential pitch so as to face the operating handle on the circumference around the water volume setting axis, and the amount of water to be spouted is determined. This is a configuration that sets the value to an arbitrary value.

In addition, in the latter publication, the stopper pin is shaped to extend in an arc shape, and the amount of water to be spouted can be set in the same manner as above by installing the stopper pin at a desired position within the engagement hole. be.

However, in the former publication, the stopper pin is fitted into an arbitrary engagement hole formed with circumferential pitches at a required interval to regulate the rotation angle of the operation dial, so the stopper pin corresponds to the formation pitch of the engagement hole. Only discontinuous angle control can be performed. Therefore, the set value of the amount of water to be spouted is also discontinuous, and there is a problem in that the maximum amount of water to be spouted cannot be precisely set according to the application.

In addition, in the latter publication, it is possible to set the optimal amount of water by forming the arc length of the stopper pin in various ways, but since there are many types of pins and their shapes and dimensions are very similar, parts used during assembly There is a risk of getting it wrong.

[Purpose of the invention]

An object of the present invention is to reduce the amount of discontinuity in the set value of the maximum discharge amount, and to enable detailed settings depending on the application.

The technical problem to be solved by the present invention is that in the operation section of a metering faucet that sets the water discharge amount to a desired value via the water metering function section, from the water stoppage of the handle for setting the water discharge amount to the maximum water discharge amount. The first and second stoppers for regulating the angle of rotation of the faucet are attached to the faucet body in spline engagement.

[Structure of the invention]

The configuration of the present invention for achieving the above-mentioned technical problem is to maintain the on-off valve in the flow path in an open state via the water metering function section until a set water discharge amount is obtained, and to adjust the water discharge amount setting by the operation section. In a metering faucet that operates according to the rotation angle of the handle, the spindle guide, which rotatably supports a spindle with one end connected to the water metering function section and a handle attached to the other end, engages with the handle and moves to the water stop position. The first and second stoppers, which determine the position of the maximum amount of water to be spouted, are attached by spline engagement.

With the above configuration, the maximum rotation angle of the handle, that is, the spindle for operating the water dispensing function section, can be increased or decreased in accordance with the tooth formation angle pitch of the spline, and the maximum amount of water to be spouted can be continuously set.

〔effect〕

The present invention achieves the following effects with the above configuration.

(i) With a simple structure, the maximum amount of water can be set very precisely, and the maximum amount of water can be set and regulated according to the position of use.

(ii) Two stoppers can accommodate various maximum water discharge volumes, and the number of parts can be reduced.

〔Example〕

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

FIG. 1 is a partially cutaway front view of a hot water mixing type metering faucet, and FIG. 2 is a sectional view taken along the - line arrow in FIG. 1.

In the figure, 1 is a faucet main body, inside of which are a water chamber 4 and a hot water chamber 5 that communicate with the water supply pipe 2 and the hot water supply pipe 3, both chambers 4,
a mixing chamber 6 communicating with 5 via a temperature control valve V _T ;
and a discharge chamber 7 which communicates with the mixing chamber 6 via the water metering function section A and is connected to a water discharge tool 8.
Note that 200 and 201 are blind plugs that are screwed onto the front and back surfaces of the faucet body 1.

The temperature control valve V _T is equipped with a hollow cylindrical valve shaft 101 that is moved forward and backward by a temperature setting handle 100 located on the side of the faucet body 1, and has a valve shaft 101 in the form of a hollow cylinder that can be moved forward and backward by a temperature setting handle 100 located on the side of the faucet body 1. A water valve section 102 and a hot water valve section 103 are formed to open and close the flow path to the water passageway 6, and the temperature of the mixed water can be set by the valve opening degrees of both the valve sections 102 and 103.

The water metering function part A is composed of a water metering unit M located in a storage chamber 9 that is open at the front side of the faucet body 1 and protrudes in the direction of the mixing chamber 6, and a mixing chamber 6 and a discharge outlet are provided at both upper and lower ends of the storage chamber 9. Opening 10,1 connecting chamber 7
1.

The upper surface of the upper opening 10 is formed as a valve seat 10a, and an opening/closing valve body 12 that approaches and separates from the valve seat 10a is slidably disposed within a lid body 13 that is screwed coaxially with the opening 10 to open and close it. It constitutes valve _V1 . The space defined between the on-off valve body 12 and the lid body 13 is constantly connected to the mixing chamber 6 through a small hole (not shown) drilled in the on-off valve body 12, and serves as a pressure chamber P during water supply. act.

A hollow guide tube 14 that slides within the opening 10 is screwed onto the lower end of the on-off valve body 12.
A valve shaft 15 whose upper end reaches into the pressure chamber P is attached to the lower part of the guide cylinder 14 with a retaining ring 16 attached thereto.

This valve shaft 15 has a groove 15b in the longitudinal direction on its circumferential surface.
The opening 12 is recessed in the middle of the on-off valve body 12.
a, a gasket 17 serving as a valve seat is attached above the opening 12a, and a valve body portion 15a that approaches and separates from the gasket 17 constitutes a relief valve V _R that can communicate between the inside and outside of the pressure chamber P. . When the valve shaft 15 rises, water in the pressure chamber P can be discharged toward the storage chamber 9 through the groove 15b. 18 is a coil spring that biases the valve shaft 15 in the direction of closing the relief valve _VR .

In this embodiment, the water metering unit M is a cartridge type, and is mainly composed of a housing 19 made of polyacetal that is fitted into the storage chamber 9, and a spindle 20.
It has an integral structure in which the two are connected.

A convex portion 19a is provided on the side surface of the fitting end of the housing 19.
is fitted into a recess 9a formed in the storage chamber 9, and the housing 19 is positioned at a fixed position with respect to the faucet main body 1. It can be attached by screwing from the front side.

The housing 19 defines a flow path F that communicates the openings 10 and 11 of the storage chamber 9, and a camshaft 22 is rotatably mounted across the flow path F.
is linked to the spindle 20 by a gear pair 23,24. A cam 25 is rotatably attached to the camshaft 22 within a certain angle range in the flow path F. The cam 25 contacts the lower surface of the valve shaft 15 and moves the valve shaft 15 up and down based on the rotation of the camshaft 22. The relief valve V _R and the on-off valve V ₁ are opened and closed. Also,
Reference numeral 26 denotes a protruding shaft that is installed so as to protrude in the radial direction of the cam shaft 22, and is used to provide the cam 25 with a fixed amount discharging operation, which will be described later.

Reference numeral 27 denotes a blade wheel which is similarly located in the flow path F and is rotatably arranged by a shaft 28. A pinion 29 is screwed onto one end of the shaft 28, and the pinion 29 prevents the rotation of the blade wheel 27 by the water flow. It meshes with a gear train 30 that reduces the speed and transmits the speed to the camshaft 22. The final gear 30a of the gear train 30 is attached to the camshaft 22 via a friction clutch mechanism C, and rotation from the gear train 30 is transmitted to the camshaft 22.
Even if the camshaft 22 is rotated by the spindle 20, this rotation is not transmitted to the gear train 30.

After the metering unit M having the above configuration is installed in the storage chamber 9, the handle 31 is connected to the spindle 20 with a screw 32. In this case, first and second stoppers 33 and 34 are provided on the spindle guide 21 to regulate the rotation angle of the spindle 20 and determine the water stop position and the maximum water discharge position when the metering unit M rotates the handle 31. Installing.

FIG. 3 is an exploded perspective view showing how the first and second stoppers 33, 34 are attached to the spindle guide 21.

The spindle guide 21 extends through the insertion hole 21a of the spindle 20 in the axial direction, and has a spline 21d and an annular groove 21e formed in a cylindrical portion 21c protruding toward the front side of the collar portion 21b.

The first stopper 33 is formed into a ring shape from a stainless steel plate, has a spline 33a on its inner periphery that matches the spline 21d, and has a protrusion 33b projecting in the radial direction. Furthermore, there is a second
A scale 33c is drawn to indicate the maximum amount of water to be spouted when the stopper 34 is attached.

The second stopper 34 is also ring-shaped with a smaller diameter than the first stopper 33 on which splines 34a are formed, and has a protrusion 34b in the radial direction.
By engaging the splines 21d and 34a according to the scale 3c, the protrusions 33b and 34b face each other at a predetermined angle, regulating the rotation angle of the handle 31, and setting the flow rate set by the scale 33c as the maximum set water discharge rate. can do. A retaining ring 37 is fitted into the annular groove 21e to retain the first and second stoppers 33 and 34. Above handle 3
1, the first and second stoppers 33, 34, and the spindle 20 constitute an operating section B.

4a is a front view of the cam 25, and for the purpose of explanation, the orthogonal coordinate system (X
-Y) is attached. The cam 25 has a circular cam with a radius R and a notch N into which the valve shaft 15 falls.
It is formed so as to be continuous with the circular arc surface of this notch N. As shown in the figure, a second circular arc portion 25a with a radius R is formed from the second quadrant to the fourth quadrant, and the distance from the center in the second quadrant is smaller than R.
A flat part 25b parallel to the axis, and a second arc part 25a in the fourth quadrant that is continuous with the flat part 25b in the first quadrant.
The first circular arc portion 25c has a radius of curvature larger than R.
are external elements, and the first and second circular arc portions 25a, 2
A protruding portion 25d is provided in a continuous portion with 5c.

Further, P ₁ and P ₂ are first and second pins located in the third and fourth quadrants, and have a phase angle of approximately 90° with respect to the origin O. A protruding shaft 26 is fixed to the camshaft 22 and is located within this 90° phase angle range and can be engaged with both pins P ₁ and P ₂ .

Here, since the cam 25 is attached to the camshaft 22 in a loosely fitted state, the camshaft 22 rotates in response to the operation of the handle 31 when setting the water discharge amount and the operating force from the water metering function section A, and the protruding shaft 25 rotates. are the 1st and 2nd pins
The cam 25 begins to rotate in a predetermined direction only when it comes into contact with P ₁ and P ₂ , and when the protruding shaft 26 is located between both pins P ₁ and P ₂ and is rotating, the cam 25 remains stationary. keep.

The camshaft 22 and cam 25 are installed under a predetermined relative angle relationship with the spindle 20 and handle 31, which will be explained below.

FIG. 5 shows the front side of the water metering unit M, which is the position viewed from the - line arrow in FIG. In the figure, 35 is a spindle cover for connecting the spindle 20 to the housing 19, and is fixed to the housing 19 with screws 36.

The tip of the spindle 20 has a notch 20a chamfered on a flat surface to position and connect the handle 31, and when the notch 20a is horizontal as shown, the camshaft 22 The water metering unit M is assembled so that the protruding shaft 26 is oriented vertically downward.

Moreover, FIG. 6 shows the state of the cam 25 at the spindle 20 position in FIG.
The water is stopped as shown in the figure a.

7 and 8 are a sectional view and a bottom plan view of the handle 31, showing a through hole 31a into which the notch 20a at the tip of the spindle 20 is fitted, and a cosmetic cap attachment hole 31.
It is made of ABS resin and has the shape of a bowl with an opening at one end with b inserted through it. Ribs 31 radially inside
c is formed, and one rib 31c has a first and a second rib 31c.
Projections 31d that engage with the stoppers 33 and 34 are formed.

Here, the first stopper 33 is one side 3 of the protrusion 33b.
The spindle guide 21 is aligned so that 3d points toward the index T provided on the faucet body 1 as shown in FIG.
The second stopper 3 is engaged with the spline 21d of the
4 aligns the lower part 34c of the projection 34b with the scale 33c of the first stopper 33 and engages it with the spline 21d. Next, the retaining ring 3 is placed in the annular groove 21d.
7, align the handle 31 with the notch 20a of the spindle 21 and fit it into the through hole 31a,
The assembly is completed by fixing with screws 32.

In the above configuration, the first stopper 33
1d is the water stop position, and when the handle 31 is rotated, the protrusion 31d of the second stopper 34 similarly engages to prevent the handle 31 from rotating, and the second stopper 34 controls the maximum discharge amount. It can be predetermined during assembly.

When discharging hot water or water, use the handle 31
The total amount of water to be spouted is set by the rotation angle of , and by rotating the handle 31, a fixed amount of water can be spouted by the water metering function part A as described later.
In this operation, the maximum amount of water discharged is determined by the second stopper 34 as described above, so if it is less than this maximum amount of water discharged, the scale 31--
A water discharge amount matching M can be obtained. As the handle 31 rotates, the cam shaft 22 rotates counterclockwise in _FIG . The cam 25 is displaced and rotated as shown in FIG. As the cam 25 rotates, the first circular arc portion 25c and the second circular arc portion 25a are positioned in the direction of the valve shaft 15, the valve shaft 15 is pushed and raised, and the valve body portion 15a is separated from the seal 17 and released into relief. Valve _VR opens.

With this valve opening, the water in the pressure chamber P is discharged from the groove 15b of the valve stem 15 to the flow path F in the storage chamber 9, and as the valve stem 15 rises, the guide cylinder 14, which is locked to the retaining ring 16, rises, the gasket of the on-off valve body 12 separates from the valve seat 10a, and the on-off valve _V1 opens.

As a result of the above, the mixed water flows down into the flow path F from the opening 10, the impeller 27 rotates, the rotation of the impeller 27 is decelerated through the shaft 28 and the gear train 30, and the camshaft 22 is rotated as shown in FIG. 4b. Rotate clockwise.

Here, when setting the amount of water to be spouted using the handle 31, the protruding shaft 26 abuts and engages with the second pin _P2 ;
Since the cam 25 is loosely fitted onto the camshaft 22, only the camshaft 22 continues to rotate. During this rotation of the camshaft 22, the cam 25 remains stationary in the state shown in FIG. 4b, and maintains the valve shaft 15 in the raised position to continue discharging water.

Thereafter, by controlling the rotation of the camshaft 22, the protruding shaft 2
6 comes into contact with the first pin _P1 , the cam 25 rotates clockwise together with the camshaft 22, and as shown in FIG. Trying to displace. At this time, the contact portion of the lower end of the valve shaft 15 is the second circular arc portion 25a.
Unlike point contact with , an acting force f is applied to push the cam 25 clockwise as shown.
That is, the lower end surface of the valve shaft 15 has a spherical shape, and when it reaches the first circular arc portion 25c having a large curvature as shown in FIG. They come into contact at a position that is biased to the right. Therefore, due to the urging force of the spring 18, the downward force of the valve shaft 15 does not act toward the center of the camshaft 22, but acts to rotate the cam 25 clockwise.
Due to this acting force f, the cam 25 rotatably attached to the camshaft 22 is instantly rotated from the state shown in FIG. Figure 4a
Returns to water stop position.

Therefore, just before water is discharged, the flow rate decreases and the impeller 2
Even if the rotational force of the cam 25 becomes weak or small, the cam 25 reliably returns to the water stop position and no water stop failure occurs.

Then, when the valve shaft 15 falls into the notch N of the cam 25, the valve body portion 15a is seated on the packing 17 by the elastic force of the coil spring 18, and the relief valve V _R is immediately closed, and the opening/closing valve body 12 is also The valve attempts to return to the closed position due to the elastic force of the coil spring 18, but at this time the pressure chamber P is only filled with water flowing through a small hole (not shown) drilled in the opening/closing valve body 12. Since its volume cannot be increased, the on-off valve body 12 returns slowly to the closed position, and the on-off valve _V1 closes slowly.

As described above, simply by turning the handle 31 to set the set water discharge amount, the on-off valve V ₁ opens and starts discharging water, and the operation of the water metering unit M automatically closes the on-off valve V ₁ to reach the set amount. Water can be discharged.

The set amount of water to be spouted is proportional to the clockwise rotation angle of the handle 31 in FIG. 1, and the maximum settable water amount is determined by the mounting position of the second stopper 34 that controls the rotation angle to the spindle guide 21 be done. When the handle 31 is rotated at the time of starting water spouting, the protrusion 31d moves to the protrusion 3 of the second stopper 34.
4b and cannot be rotated, and this state becomes the maximum amount of water that can be set.

This maximum water spouting amount is set as a value depending on the location of use to prevent wasteful water spouting, and can be set to an arbitrary value at the time of assembly by changing the mounting angle of the second stopper 34 according to specifications.

In the present invention, after the water metering unit M is attached to the faucet body 1, first the first stopper 33 is attached in alignment with the index T, and then the first stopper 33 is attached in alignment with the scale 33c on the surface of the first stopper 33 as shown in FIG. By attaching it in this way, you can easily set the maximum water discharge amount.

In addition, in this setting, since the second stopper 34 is configured to spline engage with the spindle guide 21, if the number of teeth of the splines 21c and 34a is increased, the second stopper 34 with respect to the spindle guide 21 can be
The mounting angle pitch of the stopper 34 can be reduced. Therefore, the increase or decrease in the set value of the maximum amount of water discharged based on the mounting angle of the second stopper 34 can be made small, and the setting of the maximum amount of water discharged can be set to an arbitrary value.

In addition, in the present invention, the spindle guide 21 and the first,
Splines 21 on both second stoppers 33 and 34
c, 33a, and 34a, but a spline is formed only on one of them, for example, the spindle guide 21, and the first and second stoppers 33 and 34 are provided with protrusions that can be aligned with the tooth formation pitch of the spline. It is good also as a structure where it is provided.

In addition, the shape of the cam 25 and the configuration of the on-off valve _V1 are as follows:
Various modifications are possible.

Furthermore, in this embodiment, the mixing chamber 6 of the faucet main body 1 houses the water metering function part A and the on-off valve part V1, but the water metering function part A and the on-off valve part _V1 are housed in the mixing chamber 6 of the faucet main body 1, but the water metering function part A and the opening/closing valve part V1 are housed in the mixing chamber 6 of the faucet main body 1. A case unit shaped like a storage chamber housing the water function part A and the on-off valve part _V1 may be interposed.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of a metering water faucet according to the present invention, Fig. 2 is a sectional view taken along the - line arrow in Fig. FIG. 4a is a front view of the cam when the water is stopped; FIG. Figure c is a front view showing the state just before the cam returns to the water stop position, Figure 5 is a front view of the water metering unit as viewed from the - arrow in Figure 2, and Figure 6 is a front view of the water metering unit as viewed from the - arrow in Figure 2.
The figure is a front sectional view showing the state of the cam at the spindle position shown in Fig. 5, Fig. 7 is a sectional view of the handle, Fig. 8 is a bottom plan view of the same, and Fig. 9 is the first and second cams.
FIG. 3 is a front view showing a state in which the stopper is attached. 1... faucet body, 20... spindle, 21...
...Spindle guide, 21c...Cylinder part, 22...
Camshaft, 25...cam, 27...blade wheel, 30...
Gear train (reduction mechanism), 31...handle,
31d... protrusion, 33... first stopper, 34...
...Second stopper, A...Water flow function section, B...Operation section, _V1 ...Opening/closing valve.

Claims (1)

[Claims] 1. A faucet body that forms a flow path that connects the water supply source side and the water spouting device side, an on-off valve provided in the middle of the flow path, and an on-off valve provided downstream of the on-off valve that opens and closes it based on the set water flow rate. It has a water volume function section that automatically closes the valve, and an operation section that operates the same volume water function section and sets the amount of water to be spouted, and the water volume function section is rotated by water flowing from the on-off valve. In the metering faucet, which has a blade wheel, a camshaft that rotates as the rotation of the blade wheel is transmitted, and a cam that is attached to the camshaft and is linked to the on-off valve, the operating section rotates the camshaft. A spindle that is driven and has a handle attached to the outside of the faucet body, a spindle guide that rotatably supports the spindle and has a cylindrical portion that projects outside the faucet body, and a handle that is detachably attached to the spindle guide. It comprises first and second stoppers that engage with internal protrusions to restrict the rotation angle of the spindle, and the first and second stoppers are attached to the cylindrical portion of the spindle guide by spline engagement, and further 1st
The stopper engaged with the protrusion to set the rotation angle of the spindle to the water stop position, and the second stopper engaged with the protrusion so that the rotation angle of the spindle could be set to the maximum water discharge position. A metered water faucet characterized by: