JPS6343149B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic water stop device that automatically stops water when a set amount of water is discharged.

Various devices of this type have been proposed so far, but among them, one is one in which the amount of water discharged is detected by an impeller that is rotationally driven by running water, and the valve is closed by the deceleration rotational output of the impeller. , Mikiakiaki
Some of these are disclosed in Publication No. 52-143033 and Japanese Patent Publication No. 44-9418. However, all of these use a valve that opens by moving a valve body in the axial direction as a water stop valve, and therefore has the following problems. In other words, in an automatic water shutoff device, it is better to place the impeller after the water shutoff valve to reduce the rotation of the impeller when the valve is closed and to open and close the valve using the deceleration rotation output. This is preferable because no water pressure is applied to the members, and it is easy to make the vessel body water-sealed. However, in order to ensure that the impeller rotates with running water, it is necessary to
It is necessary to allow the water to flow in the tangential direction of the impeller, and it is preferable that this water is rectified, and for this purpose the flow channel must be constricted to some extent in the front stage of the impeller. However, if the valve is opened and closed by moving the valve body in the axial direction as described above, it is necessary to provide an operating space for the valve body and a part that narrows the flow channel between the valve and the impeller. Therefore, the total length of the waterway becomes considerably long. In particular, in the former publication, an operation direction changing means for moving the return valve body in the axial direction by the deceleration rotational output of the impeller is arranged in the flow channel between the valve and the impeller. Even more so. by the way,
When this automatic water stop device is attached to the tip of a water supply pipe of a water faucet, there are the following limitations. In other words, if the faucet is a flexible faucet installed in a bathroom, a gap of 5 cm must be provided between the top of the bathtub and the water supply pipe according to the Water Supply Act, but this flexible faucet In the case of an automatic water stop device that is attached to the water supply pipe of a faucet, its height must be within 5 cm. Since it is preferable for the flow path in an automatic water stop device to be as straight as possible to reduce flow path resistance and prevent the flow rate from becoming small, there is a A valve that requires an operating space for the valve body or a part that restricts the flow channel is not suitable for use by being attached to the water supply pipe of a faucet. In addition, the rotation of the impeller must be considerably slowed down in order to supply water to the bathtub, but this requires support for the reduction gear train consisting of many gears and other rotating parts. The device shown in the above-mentioned publication uses many shafts, making it difficult to assemble, and the space occupied by these members and the valve opening/closing member is large, making it impossible to make the overall shape compact. .

The present invention has been made in view of these points, and it not only allows the impeller to be rotated reliably and efficiently by flowing water and allows accurate setting of the amount of water discharged, but also improves the flow path section and control. It is an object of the present invention to provide an automatic water stop device in which all mechanical parts are compact and easy to assemble, and which provides a good feeling of operation for setting the amount of water to be discharged.

The present invention will be described below. The present invention includes an inlet, an outlet, a water stop chamber and a water amount detection chamber that are arranged in series in a straight flow channel between the two,
An operation dial for setting the amount of discharge, a control rod that opens and closes the spherical valve provided in the water stop chamber by axial movement, and a deceleration rotation output of an impeller placed in the water amount detection chamber and rotated by the flowing water. A front cam that rotates in conjunction with the rotational input from the operation dial to move the control rod in the axial direction, and a floating cam that fixes the operation dial and allows the front cam to freely rotate within a predetermined angle around the axis. The spherical valve provided in the water stop chamber is equipped with a camshaft attached as a coupling and a friction clutch supported by the camshaft to connect the front cam and the deceleration rotation output section of the impeller. It consists of a valve hole that communicates with the detection chamber, and a ball that contacts one end of the valve hole with water pressure to close the valve hole and opens the valve hole when pressed by a control rod.
The impeller disposed in the water amount detection chamber has its blade portion located near the other end of the valve hole, and the axial direction of the control rod is approximately parallel to the linear flow path from the inlet to the discharge port. The reduction gear train, which is orthogonal to the front cam and has one end spring-biased against the front cam and decelerates the rotation of the impeller, is supported by two axes: the rotation axis of the impeller and an axis parallel to this rotation axis. The gear train supported by each shaft meshes with each other alternately, and the two shafts and the control rod are arranged around the camshaft parallel to the camshaft and within the axial projection plane of the front cam. This configuration reduces loss due to flow resistance of water flowing through the flow channel, provides good linearity between the impeller rotation speed and flow rate, and shortens the overall length in the flow channel direction. At the same time, the number of axes for supporting rotating members such as the reduction gear train, impeller, operation dial, and front cam is reduced.In particular, by using the front cam, it is possible to control the opening and closing of the spherical valve in the water stop chamber. It has a simple structure with a small number of parts and is compact as a whole.The present invention will be explained in detail below with reference to the illustrated embodiments. This automatic water stop device includes a main body 1 having a water supply pipe connection port 2 as an inlet at the upper end and a water outlet 3 at the lower end, and an operation dial 10 disposed on the front surface of the main body 1. First, the main body 1 will be explained. Immediately below the water supply pipe connection port 2, there is a water stop chamber 4 equipped with a spherical valve 5 and a water amount detection chamber having an impeller 6, and directly below the water stop chamber 4. A spout 3 with a nipple 41 attached is arranged on the
An impeller 6 is pivotally supported beside the linear flow channel between the water stop chamber 4 and the water spout 3, and its blade portion projects into the linear flow channel. The water flowing from the water supply pipe connection port 2 through the water stop chamber 4 to the water outlet 3 hits the blades of the impeller 6 in the water amount detection chamber, and
Rotate. The rotation of the impeller 6, which rotates at a rotational speed corresponding to the amount of water flowing inside the main body 1, is transmitted to the cam 12 through the reduction gear train 7, 8, the friction clutch 9, and the camshaft 11, which is the front cam. The spherical valve 5 of the water stop chamber 4 is controlled by the other end of a control rod, one end of which is in elastic contact with the cam surface 13 of the cam 12. More specifically, the spherical valve 5 is in contact with a valve hole 51 that communicates the water stop chamber 4 and the water amount detection chamber, and a valve seat 37 arranged at one end of the valve hole 51 on the water stop chamber 4 side by water pressure. When the ball 52 is pushed from the side by the control rod 14 and the spherical valve 5 is opened, the water flowing down the valve hole 51 flows through the valve hole 51. The impeller 6 is rotated by hitting the blade of the impeller 6 located directly below, and this rotation is caused by the reduction gear train 7 supported by the same rotational shaft 15 as the impeller 6 and the shaft parallel to the rotational shaft 15. The rotation of the impeller 6 is alternately transmitted to the final gear train 17 supported by the rotary shaft 15 through the reduction gear train 8 supported by the rotary shaft 15 . The final wheel train 17 rotates a clutch plate 18 rotatably supported at the tip of the camshaft 11. A clutch plate 19 is fixed to the camshaft 11 and frictionally engages with the clutch plate 18 under pressure from a spring 20.
The friction clutch 9 is formed by the two clutch plates 18, 19 and the spring 20. The cam 12 attached to the camshaft 11 has the camshaft 1 inserted into the center engagement hole 21.
The camshaft 1 is connected to the camshaft 11 by inserting the camshaft 1 at the connection part with the cam 12.
1 has a semicircular D-shaped cross section, whereas the engagement hole 21 of the cam 12 has a 3/4 circular shape, and the cam shaft 1 has a D-shaped cross section.
1, the cam 12 is a loose coupling that allows the cam 12 to rotate within a predetermined angle α. The reason for this will be explained later. Cam surface 13 provided on one surface of cam 12
A continuous water flow setting surface 22, a water cutoff engagement surface 23, and an automatic water cutoff setting surface 24 are arranged in sequence in the circumferential direction, and the water cutoff engagement surface 23 has a V-shaped cross section. It is formed as a recess connected to the continuous water flow setting surface 22 and the automatic water cutoff setting surface 24 by an inclined surface, respectively, and a concave surface 25 is formed in the middle of the slope between the continuous water flow setting surface 22 and the automatic water cutoff setting surface 24. Furthermore, small concave surfaces 26 are provided in portions of the automatic water stop setting surface 24 that are close to the water stop engagement surface 23, respectively. The cam surface 13 formed in this way has a control rod 14 arranged parallel to the cam shaft 11, the rotating shaft 15, and the shaft 16, and perpendicular to the linear flow channel in the main body 1. One end comes into elastic contact. This straight control rod 1
4, as shown in detail in Fig. 4, the other end is the water stop chamber 4.
It protrudes inward and is urged toward the cam 12 by the spring 27, and slides in the axial direction according to the ups and downs of the cam surface 13, and when the amount of protrusion into the water stop chamber 4 increases. Push the ball 52 of the spherical valve 5 in the water stop chamber 4 to open the valve hole 51. In FIG. 4, 28 is an O-ring, and 29 is a spring washer. The cam surface 13 shown in FIG. 4 does not actually correspond to the control rod 14. For the main body 1 configured in this way, the operation dial 10 is
It is fixed to a camshaft 11 that protrudes from the front surface. As shown in FIG. 2, the front surface of the operation dial 10 is marked with scales corresponding to "stop", "continuous", and the amount of water.

In use, insert the tip of the water supply pipe 30 of the water faucet into the water supply pipe connection port 2, and tighten the tightening nut 31.
It is fixed to this water supply pipe 30 by tightening.
The water supply pipe connection port 2 is a double wall, and the outer wall 33
The outer surface has a male thread 34 and the inner wall 35 has a split groove (not shown), and after the tip of the water supply pipe 30 is placed in contact with the inner surface of the packing 36 housed in the inner wall 35, it is screwed into the outer wall 33. When the tightening nut 31 is tightened, the pressing surface 32, which is a tapered surface provided on the inner surface of the tightening nut 31, presses the tip end surface of the inner wall 35, bending it inward, and the water supply pipe via the packing 36 is tightened. 30, the attachment to the water supply pipe 30 can be done reliably and easily. After installation in this manner, when the faucet is opened, the water is stopped by the water stop chamber 4 in which the ball 52 of the spherical valve 5 is in contact with the lower valve seat 37. At this time, one end of the control rod 14 is in contact with the water stop engagement surface 23 of the cam surface 13 due to the water pressure and the pressure of the spring 27. When it is desired to spray only a predetermined amount of water, turn the operating dial 10 clockwise in FIG. 2 to align the scale corresponding to the desired amount of water with the index on the main body 1. This operation dial 10
With the rotation of. The cam 12 also rotates via the camshaft 11, and the contact portion of the control rod 14 moves from the water stop engagement surface 23 to the automatic water stop setting surface 24, so that the control rod 14 protrudes toward the water stop chamber 4. In order to press the ball 52 of the spherical valve 5 and release it from the valve seat 37, the water passes through the valve hole 51, descends while rotating the impeller 6, and starts discharging water from the water spout 3. At the start of water discharging, that is, at the initial stage of rotation of the cam 12 by input from the operation dial 10, the control rod 14 passes through the inclined surface of the water stop engagement surface 23 and moves to the automatic water stop setting surface 24. Because of this, the control rod 14 slides gradually, and therefore the ball 52 of the spherical valve 5 is pushed gradually, so the amount of water passing through the water stop chamber 4 does not reach the maximum flow rate all at once. , gradually increase the amount of water. Note that the input from the operation dial 10 is not transmitted to the reduction gear train 7, 8 by the friction clutch 9. After the operation dial 10 is set to an appropriate water volume, the rotation of the impeller 6 is controlled by the reduction gear train 7, 8, the friction clutch 9,
It is transmitted to the cam 12 through the camshaft 11, causing the cam 12 to rotate at a slow speed, but at this initial stage, only the play part α between the camshaft 11 and the engagement hole 21 of the cam 12 moves. In this case, only the operation dial 10 is rotated and the cam 12 is not rotated. Then, when the movement of the play portion α is completed, the cam 12 also starts rotating due to the input from the impeller 6.
As the cam 12 rotates, the control rod 14 gradually comes into sliding contact with the automatic water stop setting surface 24, approaches the water stop engagement surface 23, and enters the small concave surface 26. This small concave surface 26 allows the above-mentioned play portion α between the camshaft 11 and the engagement hole 21 of the cam 12 to completely move just before automatic water shutoff occurs. When the set amount of water is reached, one end of the control rod 14 comes into contact with the water stop engagement surface 23 of the cam surface 13. Since the control rod 14 is biased toward the cam surface 13 by the spring 27, when the control rod 14 reaches the water stop engagement surface 23, the control rod 14 moves the cam 12 within the range of the play area α. While rotating rapidly, it falls onto the engagement surface 23 when water is stopped, and the spherical valve 5 is returned to quickly stop the water. The operation of the camshaft 11 and the engagement hole 21 of the cam 12 is shown in FIG.

As described above, this device that automatically shuts off water when the set amount of water is discharged can be set to continuous water flow by rotating the operation dial 10 counterclockwise in FIG. can. When the operation dial 10 is turned, the control rod 14 moves to the water stop engagement surface 2.
3 and engages with the concave surface 25 first. If the rotation of the operating dial 10 is stopped at this point, the ball 52 of the spherical valve 5 will be pushed slightly by the control rod 14, opening the valve hole 51 slightly.
A medium amount of water is passed through. The rotation of the impeller 6 at this time is not transmitted to the cam 12 due to the slip in the friction clutch 9. That is, the slip torque at the friction clutch 9 is greater than the torque required to force the control rod 14 up the slope by the rotation of the cam 12 against the spring 27 biasing the control rod 14. It's made smaller. When the operation dial 10 is further turned counterclockwise in FIG. 2, the control rod 14 comes into contact with the continuous water flow setting surface 22 on the cam surface 13, and pushes the ball 52 of the spherical valve 5 to fully open the valve hole 51. do. This means that a large amount of continuous water can be passed through. Since the continuous water flow setting surface 22 is a flat surface, the impeller 6
The input from the cam 12 and the operation dial 10 attempt to further rotate, but the stopper 40 provided on the inner surface of the operation dial 10 comes into contact with the protrusion 39 provided on the front surface of the main body 1, so that the friction clutch 9 is rotated. The cam 12 and the operation dial 10 will not be rotated further due to slipping.

In this device, which is capable of not only automatic water shutoff but also continuous water flow as described above, there are the water supply pipe connection port 2 which is the inlet, the water shutoff chamber 4, the blade of the impeller 6 in the water amount detection chamber, and the water outlet 3. Because they are arranged in a straight line, the pipe resistance is low, there is little loss, and the discharge efficiency is good.Since the blades of the impeller 6 are located directly below the valve hole 51 of the spherical valve 5, the flow rate and the impeller 6 are Good linearity with rotation speed. As is clear from FIG. 1, the water stop chamber 4 is also provided with a valve seat 38 on the side of the water supply pipe connection port 2, with which the ball 52 of the spherical valve 5 contacts, and the ball 52 is not seated on the valve seat 38. The valve seat 38 can be operated regardless of the operation of the control rod 14, that is, even when the control rod 14 is largely protruding into the water stop chamber 4.
Since the distance between the water stopper chamber 4 and the control rod 14 is determined, backflow is also prevented by the water stop chamber 4. Furthermore, the operation dial 10 is arranged perpendicularly to the linear flow channel in the main body 1 so that it can be operated from the right angle direction, so the operation feels similar to that of a water faucet that has an operation knob on the side. In addition, the camshaft 11, rotation shaft 15, shaft 16, and control rod 14 are all arranged at right angles to the flow path in the main body 1 and are parallel, making manufacturing and assembly easy. ing. In addition, the reduction gear trains 7 and 8 are supported by only two axes including the rotating shaft 15 of the impeller 6, the operation dial 10, the cam 12, and the friction clutch 9 are all supported by the cam shaft 11, and the rotation is controlled by a rod. The cam 12, which is a movement direction converting means for moving the cam 14 in the axial direction, is a front cam that directly converts rotation into axial movement, and as shown in FIGS. Moreover, since the two shafts and the control rod 14 are arranged around the camshaft 12, these mechanisms can be housed compactly. Further, the impeller 6 and the camshaft 11 are connected by a friction clutch 9, and the friction clutch 9 is supported by the camshaft 11 to which a cam 12 and an operation dial 10 are attached.
The operational feel of the operation dial 10 is good in this respect as well, and the amount of water to be sprayed can be easily set. Note that 1a in FIG. 1 is a lid fixed to the front surface of the main body 1, and the protrusion 39 is provided on this lid 1a. 42 is the rotating shaft 15, the shaft 16, and the camshaft 11
A support plate 43 supports the cam 12 and the lid 1 at one end.
This is a protrusion to suppress frictional resistance with a.

In the present invention, as described above, the valve disposed in the water stop chamber is a spherical valve composed of a valve hole that communicates the water stop chamber with the water amount detection chamber, and a ball that closes one end of this valve hole with water pressure. , the length of the valve itself in the water flow direction is short, the blade of the impeller placed in the water flow detection chamber is located near the other end of the valve hole, and the ball of the spherical valve is moved in its axial direction. Since the axial direction of the control rod that is separated from the valve hole is set to be approximately perpendicular to the flow path, there is only the valve hole of the spherical valve between the spherical valve and the impeller, and the flow path is The overall length can be made extremely short, and since this valve hole rectifies the flowing water that hits the impeller blades and at the same time determines the direction of the flow, the amount of water detected by the rotation of the impeller is accurate. be. Furthermore, the impeller and reduction gear train are supported by only two shafts, and the operation dial, cam, and friction clutch are supported by the camshaft. A control rod parallel to these two axes is arranged within the axial projection plane of the front cam attached to the camshaft, and the control rod is sometimes controlled by the front cam, so the mechanical parts for these controls are small. The entire structure is extremely compact and easy to assemble, as it fits within the available space. Since the friction clutch and cam are installed on the camshaft to which the operating dial is fixed, the rotating operation of the operating dial is smooth and has a good feel, and the amount of water to be sprayed can be easily set, making it highly practical. It is excellent.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a horizontal sectional view of the main parts of the same.
Figure 4 is an enlarged longitudinal sectional view of the main parts of the same as above, Figure 5a,
b, c, and d are a rear view, a side view, a developed sectional view of the cam surface, and an enlarged rear view of the engagement hole, and FIG. 6 is an explanatory diagram of the operation of the cam shaft and the engagement hole of the cam, a indicates when water is stopped, b indicates when set, c indicates when set is completed, d indicates operation, e indicates immediately before water is stopped (when the control rod engages the small concave surface), and f indicates when water is completed. 1 is the main body, 2 is a water supply pipe connection port as an inlet, 3 is a water outlet, 4 is a water stop chamber, 5 is a spherical valve, 6 is an impeller, 7 and 8 are reduction gear train, 9 is a friction clutch,
10 is an operation dial, 11 is a cam shaft, 12 is a cam which is a front cam, 14 is a control rod, 15 is a rotating shaft,
Reference numeral 16 indicates a shaft, 22 a continuous water flow setting surface, 23 a water stop engagement surface, and 24 an automatic water cutoff setting surface.

Claims (1)

[Scope of Claims] 1. An inlet, an outlet, a water stop chamber and a water amount detection chamber arranged in series in a straight flow channel between the two, and an operation dial for setting the amount of water discharged. , a control rod that opens and closes a spherical valve provided in the water stop chamber by axial movement, a deceleration rotation output of an impeller placed in the water flow detection chamber and rotated by running water, and a rotation input from the operation dial. a front cam that rotates in conjunction with the control rod to move the control rod in the axial direction; a cam shaft to which an operation dial is fixed and the front cam is attached as a loose coupling that allows the front cam to freely rotate within a predetermined angle around the axis; A friction clutch is supported by the camshaft and connects the front cam and the deceleration rotation output section of the impeller, and the spherical valve provided in the water stop chamber communicates between the water stop chamber and the water amount detection chamber. valve hole and
It is composed of a ball that contacts one end of the valve hole with water pressure to close the valve hole and opens the valve hole by pressure from a control rod. The control rod has its axial direction substantially perpendicular to the linear flow path from the inlet to the discharge port, and one end of the control rod is in contact with the front cam with a spring bias, and the control rod is in contact with the impeller. The reduction gear train that decelerates the rotation is supported by two axes, the rotation axis of the impeller and the axis parallel to this rotation axis, and the gear trains supported by each shaft mesh alternately. An automatic water stop device characterized in that the two shafts and the control rod are arranged around the camshaft parallel to the camshaft and within the axial projection plane of the front cam. 2. The front cam is provided with a recess into which one axial end of the control rod falls as an engagement surface for water stop, and has an automatic water stop setting surface and a continuous water flow setting surface on both sides of this recess via inclined surfaces. 2. The automatic water shutoff device according to claim 1, wherein the rotation range of the operation dial is limited to within 360 degrees. 3. Claim 2, characterized in that the inclined surface between the recess of the front cam and the continuous water flow setting surface has a small recess in the middle thereof into which one end of the control rod falls. Automatic water stop device.