JPH03186719A - Electronic quantitative stop cock - Google Patents

Abstract

PURPOSE:To rotate a cam by force of a spring, to set a water stop valve part to an open valve part and to stop feed water by rotating a motor by energizing the motor from an electronic control part and releasing a lock of a locking mechanism. CONSTITUTION:When a fluid passes through a passage 25, a turbine 22 is rotated, and a magnetic sensor 51 converts its rotation to an electric signal. When a handle 5 is operated by 90 degrees to the left first and set to a position of quantitative feed water, a microswitch is turned on and the sensor 51 and an electronic control part are energized, therefore, the control part counts the electric signal from the sensor 51, and when its integrating value reaches a set value of a water quantity setting device, a motor is energized conduction. As a result, a motor cam rotates and a high part of the motor cam pushes the other end of an arm and separates one end from a notch of a hand cam 41. Therefore, a lock of a locking mechanism 40 is released, a cam 41, a switch operating cam 27 and a cam 20 are turned by 90 degrees by force of a short spring 26a and restored to original positions, and a valve 14 becomes a closed valve state. Simultaneously, the microswitch is also turned off and feed to an electric circuit is also stopped.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electronic metering stop valve.

[Prior art]

A water stop valve provided in the flow path, an impeller rotationally driven by water passing through the flow path, a gear that decelerates the rotation of the impeller and transmits it to the cam, and a water stop valve provided in the flow path. There is a well-known metering stop valve that is equipped with a control rod that opens and closes the water valve part and automatically stops the water supply when a set amount of water flows (for example,
8-19176).

The reduction ratio of the gear that reduces the rotation of the impeller is approximately 1/100,000, and for this purpose, a large number of gears are used in fixed-rate water stop valves, and in consideration of productivity, resin molded products are used. ing.

[Problem to be solved by the invention]

In the above conventional technology, the reduction gear, which is a resin molded product, absorbs water and swells, or expands or contracts due to differences in the temperature of water or hot water, and the gap between gear meshing disappears, making it impossible to rotate and measuring There was a problem in that the water stop function was lost and malfunction occurred.Also, water that passed through the water stop valve part adhered to the gear, and when the water droplets on the gear dried after the valve was closed, dirt in the water Not only does it become red and stick to the gears,
There was also the problem that dirt and the like could get stuck and interfere with normal rotation.

In addition, since the impeller drives the cam, control rod, and water stop valve part through gears, a load is placed on the impeller, resulting in poor metering accuracy, poor reproducibility of water supply amount, and poor durability. There was a problem.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electronic metering water stop valve that eliminates the problems of the prior art by not using the rotational force of an impeller to close the water stop valve. do.

[Means for Solving the Problems] In order to achieve the above object, the electronic metering stop valve of the present invention has a water stop valve section (1
1), a cam (20) that opens and closes the water stop valve section (11), a lock mechanism (40) that locks the cam (20) with the water stop valve section (11) open, and a lock mechanism ( 40), and a spring (26) that biases the cam (20) in the direction of closing the water stop valve (11).
a) and the water stop valve part (26a) against this spring (26a).
11), and an electronic control unit (58) that energizes the motor (45).

[Operation] Operate the handle (5) to move the cam (20) to the spring (
26a) to open the water stop valve portion and start water supply. The motor (45), which is energized from the electronic control unit (58), rotates and
The spring (2) is used to unlock the locking mechanism (40).
The cam (20) is rotated by the force 6a), and the water stop valve section (11) is closed, stopping the water supply.

〔Example〕

The embodiment shown in the drawings is one in which the electronic metering stop valve of the present invention is incorporated into a mixing faucet for mixing water and hot water.
2 is the main body, 2 is the mouth, and 3 is the cartridge, which is attached to the main body with four screws 4. 5 is a handle, on the surface of which are printed the words "stop" indicating the valve closed position and "fixed water supply" indicating the valve open position. Reference numeral 6 indicates an indicator provided on the front surface of the main body 1. In the state shown in the figure, the "stop" of the handle is at the indicator 6 position, and the valve is in the closed state. 7 and 8 are pipe levers for hot water and water sides, respectively. 9 and 10 are piping for hot water and water sides, respectively.

In FIG. 1, 11 is a water stop valve section, and the flow path 1 in the main body 1
It is provided in 2. 12a is an inlet through which water mixed with hot water enters the channel 12. The water stop valve part 11 includes a shaft 13 and a valve 1 mounted on the upper part of the shaft 13.
4 and a spring 15 that biases the valve 14 downward, and the spring 15 is installed between the valve 14 and a cap 16' screwed onto the main body 1. 17
is an O-ring fitted into the cap 16''.

As shown in FIG. 9, the valve 14 includes an upper valve 14a that is press-fitted onto the upper end of the shaft 13, an O-ring 14b that fits into a groove of the upper valve 14a, and a lower valve 14c that is loosely fitted onto the shaft 13. , an O-ring 14d that fits into the groove of the lower valve 14c,
The lower pulp 14c can slide between the collar 13a of the shaft 13 and the upper valve 14a. In the state shown in FIG. 9, the shaft 13 is at the lower limit position, and the valve 14 is compressed by the valve seat 1a of the main body 1 by the spring 15 and water pressure, and is in the closed state. As will be described later, when the shaft 13 is pushed up by the cam, the collar 13a moves toward the lower valve 14.
c and pushes up the valve 14 against the spring 15 and water pressure to open the water stop valve part 11.

Referring again to FIG. 1, reference numeral 16 denotes a body, which together with a case 17 and a cover 18 constitute the cartridge 3. As shown in FIG. These parts that make up the force-tridge are molded with a durable resin such as polyacetal resin or ABS resin. The body 16 is fixed to the case 17 with two screws 19 (FIGS. 2 and 3) 20 is the water stop valve section 11
This cam is press-fitted onto a camshaft 21 rotatably supported by the body 16 and the case 17. A turbine 22 is mounted on a turbine shaft 23 rotatably supported by the body 16 and the case 17. 24 is a magnet fixed to the turbine 22, and N/
It is magnetized to S2 pole. 25 is a flow path through which the fluid that has passed through the water stop valve section 11 flows inside the cartridge 3;
16 and the case 17, and only the cam 20 and the turbine 22 are exposed to this flow path 25. The right end of the camshaft 21 penetrates the bearing hole of the body 16 and protrudes to the right. A drum 26 is press-fitted to this right end, and a torsion spring 26 is attached to the outer periphery of the drum 26.
a is wound, one end of which is connected to the drum 26 and the other end of which is connected to the body 16.
It is hung on a pin 16a that protrudes from.

Reference numeral 16b denotes a bearing portion integrally formed with the body 16, which supports the shaft 13 so as to be slidable in the vertical direction, and maintains a distance between the body 16 and the case 17 to secure the flow path 25. The left end of the cam shirt 21 passes through the bearing portion of the case 17 and protrudes to the left, and a switch actuating cam 27 is press-fitted onto this left end. This switch operating cam 27
The actuator of the microswitch 28 is engaged with the cam surface of the microswitch 28 (FIG. 5).

The microswitch 28 is attached to one side of a plate 30 attached to the case 17 with three screws 29 using bolts 31 and nuts 32 (shown in FIG. 4). 33 are two O rings that maintain watertightness between the case 17 and the camshaft 21, and are coated with grease.
A plate 34 covers the lid to prevent it from coming off. The camshaft 21 has a cam 20. Knurling is provided for press-fitting the drum 26 and the switch actuating cam 27. A gear 27a is integrally formed on the switch operating cam 27, and this gear 27a is connected to the handle shaft 3.
The gear 36 is press-fitted into the gear 5. The handle shaft 35 is rotatably supported by the case 17 and the cover 18, and its left end protrudes through the bearing part of the cover 18.
A handle 5 is fixed to this left end with a screw 37.

The handle 5 has a protrusion 5a with a portion thereof protruding like a pin, which engages with a groove 18a of the cover 18 and is rotatable within a certain angular range. A handle cover 38 is fitted to the center of the handle to hide the screw 37. 39 is a circle inserted between the case 17 and the cover 18.

A handle cam 41 that constitutes a lock mechanism 40 that locks the rotation of the handle 5 and the cam 20 is press-fitted into the handle shaft 35 .

As shown in FIG. 4, the lock mechanism 40 includes a handle cam 41 fitted to the handle shaft 35, an arm 43 that can swing around a pin 42 set up on the plate 30,
It is comprised of a spring 44 that biases one end 43a of this arm 43 against the outer periphery of the handle cam 41. The handle cam 41 has a notch 41a on its outer cam surface. The other end 41b of the arm 43 engages a motor cam 46 attached to an output shaft 45a of a motor 45 (shown in FIG. 6). 47 is the motor 45
Motor plate (Fig. 4) for attaching 2
It is fixed to the case 17 with a book screw 48. The motor 45 is a geared motor with a reduction ratio of 1/160.

In FIG. 1, reference numeral 49 is a circle inserted between the handle shaft 35 and the cover 18 and covered with a plate 50. A magnetic sensor 51 is placed close to the magnet 24, and uses a magneto-electric conversion element such as a Hall element that detects the rotating magnetic field of the magnet 24 and converts it into an electric signal. This magnetic sensor 51 is mounted on a printed circuit board 52, and the printed circuit board 52 is attached to the case 17 with two screws 53.

The electric wires from the printed circuit board 52, the microswitch 28, and the motor 45 pass through the wire harness 54 and the hole 17a of the case 17, and are pulled out from the main body 1 as the case 55 to connect to the electronic control section (not shown) and the electric wires. (Fig. 1, Fig. 4, Fig. 5).

In Fig. 1, numeral 56 is a waterproof gasket.

Body 16. The case 17 and the cover 18 are the turbine 22
゜Magnet 24. Magnetic sensor 51. Cam 20. Torsion spring 26a, lock mechanism 40 and motor 45
It constitutes a cartridge 3 containing Put on the lid. Shaft 13 constituting the water stop valve section 11. pulp 14
and spring 15 are then assembled and cap 1
6 onto the main body 1.

FIG. 10 shows an electric circuit, and the part indicated by the reference numeral 57 and surrounded by a chain line, that is, the microswitch 28. The motor 45 and the magnetic sensor 51 are housed in the cartridge 3.

58 is an electronic control unit (ECU), 59 is a water volume setting device, 6
0 is a power supply connected as shown in the figure, and the electronic control unit 58 has a function of counting electronic signals from the magnetic sensor 51 and energizing the motor 45 when the water supply amount reaches the set value of the water amount setting device 59. There is.

The operation of the above embodiment will be explained based on the flowchart of FIG.

When the handle 5 is rotated 90 degrees to the left from the position shown in FIG. 8, the handle cam 41 is rotated 90 degrees to the left in FIG. 4, and one end 43a of the arm 43 falls into and engages the notch 41a. Also, since the cam shirt 21 rotates 90 degrees to the left in FIG. 2 and 90 degrees to the right in FIGS. 3 and 5 via the gears 36 and 27a, the switch operating cam 27 is rotated to
8 and turn it ON. At the same time, the cam 20 pushes up the shaft 13 to separate the pulp 14 from the valve seat 1a of the main body 1, thereby opening the water stop valve section 11. In this state, the locking mechanism 40 locks as one end 43a of the arm 43 engages with the notch 41a of the handle cam 41.
Even if the hand is released from the handle 5, water is supplied with the water stop valve section 11 open.

rotating the turbine 22 as the fluid passes through the flow path 25;
The magnetic sensor 51 converts the rotation into an electrical signal.

When the handle 5 is first operated 90 degrees to the left to set the metered water supply position, the microswitch 28 is turned on and power is supplied to the magnetic sensor 51 and the electronic control unit 58, so the electric control unit 58 is connected to the magnetic sensor. Count the electrical signals from 51,
When the integrated value reaches the set value of the water amount setting device 59, the motor 45 is energized. When the motor 45 is energized, the motor cam 46 rotates from the state shown in FIG. The locking mechanism 40 is then unlocked, and the handle cam 41, switch operating cam 27, and cam 20 are rotated 90 degrees by the force of the torsion spring 26a and restored to their original positions, leaving the valve 14 in the state shown in FIG. The valve returns to the closed state.

At the same time, the microswitch 28 is also turned off and power supply to the electric circuit is also stopped. Also, handle cam 41. The recovery position of the switch actuating cam 27 and the cam 20 is the handle 5.
is regulated by the protrusion 5a of the cover 18 and the groove 18a of the cover 18.

FIG. 12 shows an embodiment in which the flow path formed between the body 16 and the case 17 has a different shape from the above embodiment, and the valve is in an open state in which the cam 20 is rotated 90 degrees to the left compared to FIG. 2. At this time, the degree to which the cam 20 obstructs the fluid flowing through the flow path 25' is small (see FIG. 13).

FIG. 14 shows a different embodiment of the locking mechanism 40, and is a drawing corresponding to the same cross section as FIG. 4. Pin 42 of the embodiment of FIG. 4 described above. Arm 43. Instead of the spring 44, a band-like plate spring 62 whose one end is locked to a bottle 61 set up on the plate 30 is wound around the outer periphery of the handle cam 41, and the bend m62a of the plate spring 62 is connected to the notch 41a of the handle cam 4I. It has a structure that engages and locks. To release the lock, the motor cam 46 pushes the lever 63 attached to the other end of the plate spring 62, thereby removing the bent portion 62a of the plate spring 62 from the notch 41a.

Normally, the bent portion 62a of the plate spring is pressed against the outer periphery of the handle cam 41 as shown in the figure.

〔Effect of the invention〕

Since the present invention is configured as described above, there is no mechanical load on the turbine and the turbine rotates lightly, resulting in good metering accuracy. In addition, the main parts are removable from the main body in a cartridge style, making assembly easy. Also, since only the cam and turbine are exposed in the flow path, there are fewer failures, and the valve opening operation is performed by a motor and spring. Therefore, from this point of view as well, it is possible to realize a metering stop valve that has good metering accuracy, operates reliably, is highly reliable, and is durable.

[Brief explanation of drawings]

1 to 10 show embodiments of the present invention, in which FIG. 1 is a vertical sectional view of the entire electric circuit excluding a part, and FIG.
-2 sectional view, Figure 3 is a diagram of the cartridge part seen from the right side of Figure 2, Figures 4 and 5 are 4-4 in Figure 1, respectively.
Sectional view and 5-5 sectional view, Fig. 6 is a 6-6 sectional view in Fig. 1, Fig. 7 is a 7-7 sectional view in Fig. 6, Fig. 8 is a front view, and Fig. 9 is a water stop. FIG. 10 is an electric circuit diagram, FIG. 11 is a flowchart, and FIGS. 12, 13, and 14 are longitudinal sectional views showing parts of other embodiments. 1...Main body, 3...Cartridge, 5.Handle,
DESCRIPTION OF SYMBOLS 11... Water stop valve part, 20... Cam, 22... Turbine, 24... Magnet, 26a... Spring, 40... Lock mechanism, 45... Motor, 51...
・Magnetic sensor, 58...Electronic control section

Claims (1)

[Claims] A water stop valve part (11) provided in the flow path in the main body, a cam (20) that opens and closes the water stop valve part (11), and a water stop valve part (
a locking mechanism (40) that locks the cam (20) when the water stop valve (11) is open; a motor (45) that unlocks the lock mechanism (40); 20), a handle (5) that opens the water stop valve section (11) against the spring (26a), and an electronic control section (58) that energizes the motor (45). An electronic metered water stop valve equipped with