JPS6145111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a metering faucet that spews out an amount of water set with a water volume setting handle and automatically stops spouting water.

(Prior Art) Conventionally, as this type of metering faucet, there is one disclosed in Japanese Utility Model Application Publication No. 49-36530 as shown in FIG.

To explain the one in Fig. 9, the valve shaft 14' of the on-off valve a, which is installed in the middle of the flow path 3 which connects the inlet 1 and the water outlet 2 and is installed inside the main body A, is rotatable around the outer periphery of the main body A. The rotation of the handle 8 is brought into contact with a transverse member 102 whose one end is brought into contact with a water volume setting cam 19 that interlocks with the handle 38 through a gear 101 that meshes with an internal gear 100 provided on the inner periphery of the water volume setting handle 38 provided on the handle 8. The operation opens the on-off valve a, and the water amount setting cam 19 is connected via the reduction gear train 20 to the rotary shaft 54 of the impeller 21, which is disposed downstream of the on-off valve a and is rotated by the flowing water. When the amount of water flows, the on-off valve a is closed.

In this case, the cam 19 and the final gear 20n of the reduction gear train 20 are disconnected from each other when setting the water volume, and the cam 19 is connected to the final gear 20n of the reduction gear train 20 in order to connect both 19 and 20 when the water volume is set.
The communication between the two is via a ratchet mechanism 103.

Therefore, in the above-mentioned conventional metering faucet, the connecting part between the reduction gear train and the water volume setting cam becomes large, which in turn increases the size of the metering faucet as a whole, and the teeth of the ratchet mechanism tend to chip or wear out during long-term use. There have been drawbacks such as the reduction gear train and the water volume setting cam not being able to communicate and disconnect accurately due to this problem, and the entire ratchet mechanism having to be replaced if the teeth are chipped or worn.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to communicate the reduction gear train and the water volume setting cam by other compact communication means without using a ratchet mechanism. .

(Means for Solving the Problems) The technical means taken by the present invention to solve the above-mentioned problems is that the inflow port and the outflow port are connected to each other, and a flow path is provided inside the main body, or a flow path is provided in the middle of the flow path. An on-off valve that opens and closes when the relief valve opens and closes, and is rotatably installed on the secondary side of the flow path by being fixed to a camshaft that connects to the handle shaft of the water volume setting handle, and its rotation operates the valve shaft of the relief valve to provide relief. A water volume setting cam that opens and closes the valve is installed in the flow path downstream of the cam, and a blade wheel that is rotated by water flowing through the flow path connects the rotation axis of the blade wheel with the cam shaft to control the rotation of the blade wheel. The reduction gear train of the quantity water function section has a final gear rotatably attached to the camshaft, and the gear is rotated by the camshaft. The camshaft is connected to the camshaft by being elastically clamped by a washer that is attached to the camshaft and a disc-shaped leaf spring.

(Function) According to the above technical means of the present invention, the rotation of the camshaft accompanying the rotational operation of the water amount setting handle is transmitted to the washer and the leaf spring, but the rotation of the camshaft is transmitted to the final gear of both of them. The frictional forces are not strong enough to reverse the reduction gear train, and the washers and leaf springs slip and cannot transmit rotation to the final gear. Conversely, the rotation of the final gear transmitted by the gear train is transmitted to the camshaft and handle shaft via the washer and disc spring.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the figure, A is the main body, 1 and 2 are its inlet and water spout, and the water spout 2 is connected to a water spout 2' so as to be swingable.

3 is a flow path that connects the inlet 1 and the water outlet 2;
A valve seat 4 is formed in the middle, and a piston valve body 5 corresponds to the valve seat 4 to constitute an on-off valve a.

The piston valve body 5 is located upstream of the valve seat 4, that is, in the flow path 1.
The rear part is slidably fitted to the inner peripheral surface of a cylindrical lid 7 which is screwed into an opening 6 opened in the main body A opposite to the valve seat 4 on the next side. The pressure chamber 8 is isolated from the flow path 3 by the valve body 5 and the lid 7.

In addition, a small passage 9 formed by a small gap between the piston valve body 5 and the inner circumferential surface of the lid 7 is provided in the sliding portion of the piston valve body 5 and the inner circumferential surface of the lid 7, and the pressure chamber 8 is communicated with the primary side of the flow path through the small passage 9. pressure chamber 8 by providing a relief valve b.
can be communicated to the secondary side of the flow path via this relief valve b.

The small passage 9 communicating the pressure chamber 8 with the primary side of the flow path can also be formed by drilling a small hole in the piston valve body 5, as shown in FIG.

The relief valve b has a valve hole 10 axially bored in the center of the piston valve body 5 so as to communicate the pressure chamber 8 with the secondary side of the flow path, and a relief valve body 11 that opens and closes the valve hole 10. It is biased by a spring 13 and placed in the pressure chamber 8 so as to come into close contact with a relief valve seat 12 formed around the valve hole 10.

The relief valve body 11 has a valve stem 14 on the front surface, and this valve stem 14 is inserted through the valve hole 10 and can freely slide on a cylindrical guide 15 provided in a protruding manner on the front surface of the piston valve body 5. The drainage groove 16 extends into the secondary side of the flow path, and a drainage groove 16 extending in the axial direction almost to the tip end is recessed on the circumferential surface of the drainage groove 16, and is slightly extended from the lower end of the drainage groove 16. A retaining ring 17 having an outer diameter larger than the inner diameter of the cylindrical guide 15 is wound around the upper position. Further, the tip of the valve shaft 14 is machined into a spherical shape.

18 is a water volume function section, which includes a water volume setting cam 19;
A reduction gear train 20 and a blade wheel 21 are connected to each other and housed in a casing 22, and are fitted into the main body A in a cartridge manner through an opening 23 formed in the main body A. 24 is a positioning projection provided on the casing 22.

The water amount setting cam 19 is formed by providing a recessed part 19b in a part of a circular cam surface 19a, and forming a continuous curved surface 19d between the bottom surface 19c and the cam surface 19a, and is rotatably attached to the casing 22. It is fixed to the camshaft 25 mounted on the shaft and is disposed on the secondary side of the flow path directly below the on-off valve a, and engages the valve shaft 14 of the relief valve body 11 in the recessed notch 19b when the relief valve b is closed. The tip thereof is made to closely face the bottom surface 19c of the recessed notch 19b.

One end of the camshaft 25 has gears 26, 2 that mesh with each other.
7 to a handle shaft 28, and the handle shaft 28 is connected to a screw 2 provided in an opening 23 of the main body A.
It extends outward from the main body A by inserting a lid 30 screwed onto the main body A.

One of the gears 26 and 27 is non-rotatably attached to the camshaft 25 by a serration engagement 31,
The other is integrally provided with the shaft portion 32 and the casing 22
The support shaft 33 is rotatably inserted into and attached to the shaft portion 32 through a recess 34 provided at one end of the shaft portion 32, and is non-rotatably attached by a serration engagement 35, and a handle is inserted into a recess hole 36 formed at the other end of the shaft portion 32 The tips of the shafts 28 are fitted coaxially.

The handle shaft 28 has a circular circumferential surface partially cut out except for the part through which the lid 30 is inserted, and the recessed hole 36 that fits into the tip thereof also has a circular shape so that it can fit the shape of the handle shaft 28. It is formed in a shape with a notch.

Therefore, the camshaft 25, in other words, the water amount setting cam 1
9 rotates in conjunction with the rotation of the handle shaft 28.

In addition, the handle shaft 28 has a transmission plate 37, a water volume setting handle 8, and a spring 41 sandwiched between two washers 39, 40 inserted in order into the part that protrudes outside of the main body A, and a set screw is inserted into the end of the handle shaft 28. 42 is screwed in, and the washer 40 is latched by the head of the set screw 42 to prevent the spring 41 from coming off. The transmission plate 37 is attached to the handle 38 so that it is not directly exposed to the outside.
The transmission plate 37 is housed in the opening 43 of the
and the handle 38 are pressed by a spring 41 and are in contact with each other.

In addition, the handle shaft insertion hole 44 of the transmission plate 37 has an engaging portion cut out from a part of its circumference to fit the handle shaft 28, and the transmission plate 37 and the handle shaft 28 are connected to each other.
8 is made non-rotatable like the gear 27 and handle shaft 28 described above. Therefore, the transmission plate 37 and the gear 26 rotate together with the handle shaft 28 while maintaining the same positional relationship. On the other hand, no such thing is provided between the handle 38 and the handle shaft 28, and the handle 38 and the handle shaft 28 are made rotatable.

Furthermore, ratchet teeth 45 and 46 are provided at the contact portions between the transmission plate 37 and the handle 38, respectively, as connection means.

An indicator tape 47 on which a water volume setting scale is printed is attached to the outer periphery of the transmission plate 37, and a machine screw, a plastic bushing, or the like is screwed into the main body as an indicator 48 corresponding to the indicator tape 47. Further, the handle portion 38a corresponding to the display tape 47 is transparent, and the other portion 38b is colored so that the inside cannot be seen. Therefore, the display tape 47 is not directly exposed to the outside and is configured to prevent the display from becoming dirty or disappearing. The display may be carved into the transmission plate 37. Furthermore, display on main body A, transmission plate 3
7 may be provided with an index. The transmission plate 37 and the gear 26, in other words, the water amount setting cam 19, always rotate in the same relationship, and the display and the cam 19 always correspond to each other, making it easy to set, for example, the zero point.

Therefore, when the handle 38 is rotated to rotate the water amount setting cam 19 in the direction of the arrow in FIG. rotation is transmitted to the camshaft 25 via the handle shaft 28. On the other hand, when the handle 38 is rotated in the opposite direction, when the resistance of the handle shaft 28 is smaller than the friction force between the handle 38 and the ratchet teeth 46 of the transmission plate 37, the handle 38 and the transmission plate 37 are rotated. rotate together due to frictional force, and the rotational operation of the handle 38 is transmitted to the camshaft 25. However, when the resistance of the handle shaft 38 is large, in this embodiment, the valve shaft 14 of the relief valve body 11 moves into the recessed part of the cam 19. 19b, the resistance of the handle shaft 28 overcomes the frictional force of the ratchet teeth 45, 46, and the ratchet teeth 46 of the handle 38 overcome the ratchet teeth 45 of the transmission plate 37 and are transmitted to the handle 38. The plate 37 is slippery and the handle 3
8 is not transmitted to the handle shaft 28, and the cam shaft 25 does not rotate. Therefore, the ratchet teeth 45,
46 transmits the operation of the operation part 38 in the usage direction to the water metering function part 18, but the operation in the opposite direction transmits the operation to the handle 3.
8 constitutes a freely movable connecting means.

The camshaft 25 has a reduction gear train 20 at its other end.
The final gear 20n is attached,
The final gear 20n of this reduction gear train 20 is sandwiched on both sides by a washer 49 and a disc-shaped plate spring 50, and the washer 49 is inserted into the camshaft 25 through its center, and the washer 49 is installed on the camshaft 25. Stepped section 5
1 and is attached to the camshaft 25 by screwing a set screw 52 into the end of the camshaft 25 and pressing it from the outside with a presser piece 53 interposed between its head and the leaf spring 50.

At this time, the washer 49, the leaf spring 50, and the camshaft 25 are provided with engaging portions that engage with each other so that the washer 49 and the leaf spring 50 cannot rotate relative to the camshaft 25, but the final gear 20n and the camshaft 25, and the final gear 20n is rotatable with respect to the camshaft 25.

Therefore, as the handle 38 is rotated, the camshaft 2
5 is transmitted to the washer 49 and the leaf spring 50, but the frictional force between these two on the final gear 20n is not strong enough to reversely operate the reduction gear train 20, and the washer 49 and the leaf spring 50 slip and rotate. cannot be transmitted to the final gear 20n. Conversely, the final gear 20 is transmitted by a gear train 20.
The rotation of n is transmitted to the camshaft 25 and the handle shaft 28 via the washer 49 and the leaf spring 50.

The first gear 20a of the reduction gear train 20 meshes with a gear 55 provided on the shaft 54 of the impeller 21, which is arranged to block the flow path 3 on the non-flow side of the water volume setting cam 19.

The impeller 21 is fixed to a shaft 54, and this shaft 5
4 is rotatably mounted on the casing 22.

Therefore, the impeller 21 is caused by the water flowing down the flow path 3.
rotates, and this rotation is reduced by the reduction gear train 20 and transmitted to the water amount setting cam 19.

The amount water function section 18 is connected to parts other than the shaft portion, that is, the water amount setting cam 19, the gears 20a...20n of the reduction gear train 20, the impeller 21, and the casing 2.
2 is preferably molded from a synthetic resin such as polyacetal or polyphenyline oxide, which has excellent properties such as abrasion resistance, durability, and heat resistance, and is easy to achieve precision. There is.

Note that c and d are a strainer and a stop valve, respectively, and the former is integrally attached to the lid 7 of the opening 6 facing the valve seat 4 of the on-off valve a and extends into the flow path 3.
Its tip engages with the stepped portion 56 around the valve seat 4 to surround the on-off valve a, and the latter corresponds to the valve seat 57 provided in the flow path 3 upstream of the on-off valve a from the secondary side. A protruding shaft 59 provided on the back surface of the valve piece 58 is slidably or loosely inserted into a recessed hole 61 formed in the spindle 60 in the axial direction.

The spindle 60 has a lid 63 inserted through it that is screwed into an opening 62 opened in the main body A facing the valve seat 57, and a groove 64 is provided at the outer end of the lid 63 to engage a jig such as a screwdriver. .

Further, the lid 63 and the spindle 60 have a screw 65 that is screwed into the spindle insertion portion.

Therefore, this water stop valve d also serves as a flow rate adjustment valve and a check valve.

Therefore, in order to discharge a certain amount of water from such a faucet, first turn the handle 38, and then press the handle shaft 28,
The cam 19 is rotated in the direction of the arrow in FIG. 3 via the cam shaft 25, and its circular cam surface 19a pushes up the valve shaft 14 of the relief valve body 11, opening the relief valve b, and further closing the valve. As the shaft 14 rises, the retaining ring 17 pushes the cylindrical guide 15 to push up the piston valve body 5 and open the on-off valve a, allowing water to flow into the flow path 3 and to be discharged through the water spout 2 and the water spout pipe 2'.

At this time, the pressure chamber 8 is opened by opening the relief valve b.
The water inside is discharged into the water flow path 3, and the pressure in the pressure chamber 8 becomes equal to the pressure in the flow path 3 communicating with the outside air, that is, atmospheric pressure.

Therefore, after the relief valve b is opened, the valve shaft 14 is pressed against the cam 19 only by the elastic force of the spring 13, and the valve shaft 14 easily moves upward.

Also, the force that presses the piston valve element 5 in the valve closing direction is removed, and the piston valve element 5 is easily pushed up via the retaining ring 17 of the valve shaft 14 of the relief valve element 11, and the on-off valve a is fully opened.

Simultaneously with the opening of the on-off valve a, the water passing through the valve a and flowing down the flow path 3 causes the impeller 21 to rotate, and the rotation is decelerated through the reduction gear train 20 and transmitted to the cam 19. The cam 19 automatically continues to rotate.

Also, water flows into the pressure chamber 8 little by little through the small passage 9, but because it flows out from the relief valve b, the cam 19 rotates once and the relief valve body 11
The open/close valve a continues to be open until the valve shaft 14 falls into the recessed part 19b of the cam 19 and the relief valve b closes.

That is, the relief valve body 1 is placed in the concave notch 19b of the cam 19.
When the valve stem 14 of No. 1 falls down, the relief valve b immediately closes due to the elastic force of the spring 13 applied to the relief valve element 11, and the piston valve element 5 is also machined by the elastic force of the spring 13 so as to be brought into close contact with the valve seat 4. Then, on-off valve a closes.

The closing operation of the on-off valve a is performed slowly as the volume of the pressure chamber 8 increases due to the inflow of water into the pressure chamber 8 from the small passage 9, so that water hammer does not occur.

The opening time of the on-off valve a, in other words, the flow rate is set by setting the rotation angle of the water volume setting cam 19 by operating the water volume setting handle 38.

That is, when the cam 19 is rotated in the direction of the arrow by operating the handle and set to a desired angle, the water flow passing through the on-off valve a and flowing in the flow path 3 rotates the impeller 21, and the cam 19 is further rotated in the direction of the arrow. When the cam 19 rotates one turn from the state shown in FIG.
b faces the valve shaft 14 of the relief valve body 11, and the valve shaft 14 falls into the recessed part 19b, closing the relief valve b. Therefore, if the rotation angle of the cam 19 rotated by the handle 38 is large, the opening/closing valve a The opening time, that is, the discharge time is short, and the smaller the rotation angle, the longer the discharge time.

When the on-off valve a closes and the flow of water to the flow path 3 stops, the rotation of the impeller 21 naturally stops, and therefore the cam 1
9 also stops rotating.

To manually dispense water, the handle 38 is turned to rotate the cam 19 in the direction of the arrow in FIG. 3, as in the case of dispensing a fixed amount of water. When the valve shaft 14 of the relief valve body 11 is slightly pushed upward by the curved surface 19d of the cam 19, the relief valve b becomes half open, and therefore the on-off valve a also becomes half open, allowing water to be discharged little by little. When the handle 38 is further turned and the circular cam surface 19a of the cam 19 pushes up the valve shaft 14 of the relief valve body 11 further, the relief valve b and the opening/closing valve a are fully opened and a large amount of water can be discharged. To stop water spouting, turn the handle 38 in the opposite direction, drop the valve shaft 14 of the relief valve body 11 into the recessed part 19b of the cam 19,
Relief valve b is closed and on-off valve a is closed.
Even if the handle 38 is turned too much by mistake, the valve shaft 14 of the relief valve body 11 may be damaged by the concave notch 19b of the cam 19.
The resistance of the handle shaft 28 is applied to the handle 38
The handle 38 and the transmission plate 37 slip over the frictional force of the ratchet teeth 45 and 46 of the transmission plate 37, and the rotation of the handle 38 is not transmitted to the handle shaft 28, so that the camshaft 25 does not rotate. Therefore cam 1
9. There is no risk that the valve stem 14 of the relief valve body 11 will be damaged.

Rotate the handle 38 so that the cam 19 rotates in the direction of the arrow in FIG. 3, and drop the valve shaft 14 of the relief valve body 11 into the recessed part 19b of the cam 19 to close the on-off valve a. Of course, it is also possible.

In the above-described embodiment, ratchet teeth 45, 4 are used as means for connecting the handle 38 and the transmission plate 37.
6 was used, but the camshaft 25 and reduction gear train 20
A friction joint may also be used in connection with the final gear 20n. Furthermore, when the handle 38 is rotated in the opposite direction, it is also possible to keep the handle 38 idling so that its rotational force is not transmitted to the handle shaft 28.

Furthermore, the opening/closing valve a may not be a pilot type (relief valve type) but may be opened and closed directly by the water metering function section 18.

Furthermore, in addition to the on-off valve a that is automatically opened and closed by the water metering function section 18, a manual on-off valve that is manually opened and closed may be provided in the flow path 3.

(Effects) Since the present invention has the above configuration, it has the following advantages.

(1) The final gear of the reduction gear train is rotatably mounted on the camshaft, and the washer, which is non-rotatably mounted on the camshaft, is elastically clamped with a disc-shaped leaf spring, thereby attaching the reduction gear train to the camshaft. Since the connecting portion between the camshaft and the reduction gear train is not structurally large, the metering faucet as a whole can be made smaller.

(2) Unlike the ratchet mechanism, there is no risk of teeth chipping or tooth tips being worn out, resulting in poor engagement.

(3) Even if the disc-shaped leaf spring wears out, it can be restored to its original state by tightening the leaf spring, so there is no need to replace it, which is economical.

[Brief explanation of the drawing]

The drawing shows one embodiment of the metering faucet of the present invention, and the first embodiment
The figure is a vertical side view, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a sectional view taken in the same section as FIG. Figure 4 is - of Figure 1.
A cross-sectional view along the line is shown with a portion cut away. Fig. 5 is a sectional view taken along the - line in Fig. 1, Fig. 6 a, b, and c are sectional views taken along lines a-a, bb-b, and c-c in Fig. 1, respectively, and Fig. 7 is a sectional view of the operating section. FIG. 8 is an enlarged exploded perspective view, and FIG. 8 is a vertical sectional view showing another embodiment of the on-off valve portion. FIG. 9 is an explanatory perspective view showing an example of a conventional metering faucet, partially cut away. A: Main body, a: Open/close valve, b: Relief valve, 1:
Inflow port, 2: Water outlet, 3: Channel, 14: Valve shaft, 1
9: Water volume setting cam, 20: Reduction gear train, 2
0n: Final gear of reduction gear train, 21: Impeller, 25: Camshaft, 38: Water volume setting handle, 4
9: Washer, 50: Disc-shaped leaf spring.

Claims (1)

[Claims] 1. A flow path built into the main body that connects the inlet and water outlet, an on-off valve installed in the flow path that opens and closes when the relief valve opens and closes, and a camshaft connected to the handle shaft of the water volume setting handle that connects the flow path. A water volume setting cam is rotatably installed on the secondary side of the flow path, and its rotation operates the valve shaft of the relief valve to open and close the relief valve. The metering water function section includes a rotating impeller and a reduction gear train that connects the rotating shaft of the impeller and the camshaft, decelerating the rotation of the impeller and transmitting the reduced rotation to the camshaft. The reduction gear train is characterized in that a final gear is rotatably mounted on a camshaft, and the gear is connected to the camshaft by being compressed and clamped between a washer that is non-rotatably mounted on the camshaft and a disc-shaped leaf spring. metered water faucet.