JP2006308021A - Opening and closing valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening and closing valve device of which operation force changes smoothly, with good operation feeling. <P>SOLUTION: An opening and closing valve device (32) is used with a hot-cold mixing faucet for stopping/discharging mixed water in which hot water and cold water is mixed. It comprises a main valve element (46) provided with a pressure releasing hole (44), a valve seat (52b) on/from which the surface of the main valve element is seated/separated, a pilot valve (40) for opening/closing the pressure releasing hole, a pressure chamber in which, when the pilot valve closes the pressure releasing hole to increase a pressure inside, the main valve element is shifted toward the valve seat, a pilot valve energizing means (42) which is arranged in the pressure chamber and energizes the pilot valve to close the pressure releasing hole, an operation part (36) which is shifted between water discharge position and water stop position by pressurizing operation of a user, and a pilot valve releasing means (38) which detaches the pilot valve from the pressure releasing hole against the energizing force of the pilot valve energizing means when the operation part is shifted to the water discharge position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an on-off valve device, and more particularly to an on-off valve device used for a hot and cold water mixing faucet that stops and discharges mixed water in which hot water and water are mixed at an appropriate temperature.

2. Description of the Related Art Conventionally, a pilot type on / off valve that includes a main valve and a pilot valve for opening and closing the main valve has been known, and many types of pilot type on / off valves have been proposed.
Japanese Patent No. 3632976 (Patent Document 1) describes such a type of on-off valve device. As shown in FIG. 17, the on-off valve device 300 described in Japanese Patent No. 3632976 includes an operation unit 302 that is pushed downward by a user's operation, a push rod 304 whose base end is coupled to the operation unit 302, A pilot valve 306 provided at the tip of the push rod 304 is provided. Here, a buffering coil spring 308 is provided between the tip of the push rod 304 and the pilot valve 306. The on-off valve device 300 further includes a pilot valve port 310, a diaphragm type main valve 312 in which the pilot valve 306 comes in contact with and dissociates from the pilot valve port 310, and a push rod 304 formed on the back surface of the main valve 312. And a housing 316 for forming a pressure chamber 314 for accommodating the pilot valve 306 and the coil spring 308, and a valve seat 318 on which the surface of the main valve 312 is seated and separated. Further, a seal member 320 is provided at a portion of the housing 316 where the push rod 304 is inserted. Further, a small hole 322 is formed on the outer peripheral side of the main valve 312.

In this on-off valve device 300, the pilot valve 306 provided in the pressure chamber 314 is brought into contact with and dissociated from the pilot valve port 310 of the main valve 312, thereby opening and closing the pilot valve 306, and stopping and discharging water. Switching.
First, when switching from the water discharge state to the water stop state, the operation portion 302 is pressed to lower the push rod 304 and the pilot valve 306, and the pilot valve port 310 of the main valve 312 is closed by the pilot valve 306. At this time, the coil spring 308 interposed between the push rod 304 and the pilot valve 306 is in an extended state until the pilot valve 306 descends and comes into contact with the pilot valve port 310. Next, when the pilot valve 306 contacts the pilot valve port 310, the coil spring 308 is compressed by the push rod 304 and presses the pilot valve 306 against the pilot valve port 310. When the pilot valve port 310 is closed, the pressure in the pressure chamber 314 rises due to the pressure of water flowing into the pressure chamber 314 through the small hole 322. As the pressure increases, the main valve 312 moves toward the valve seat 318. As a result, the main valve 312 is seated on the valve seat 318 and switched to the water stop state. In the water stop state, the coil spring 308 interposed between the push rod 304 and the pilot valve 306 is maintained in a compressed state.

  Further, when switching from the water stop state to the water discharge state, by pressing the operation unit 302 again, the operation unit 302 is moved to the upper water discharge position and maintained at that position. When the operation unit 302 and the push rod 304 are moved upward, the pilot valve 306 is dissociated from the pilot valve port 310 of the main valve 312, whereby the pressure in the pressure chamber 314 is reduced and the main valve 312 is moved to the valve seat. It leaves from 318 and will be in the water discharge state.

  In this on-off valve device 300, the spring constant of the buffer coil spring 308 can be designed to be small, and the force required to compress the coil spring 308 can be reduced. Therefore, the operation portion 302 is pressed between before the pilot valve 306 contacts the pilot valve port 310 and when the coil spring 308 is compressed after the pilot valve 306 contacts the pilot valve port 310. The operating force does not change greatly, and the operational feeling is good.

Japanese Patent No. 3632976

  However, in the open / close valve device described in Japanese Patent No. 3632976, the spring constant of the buffer coil spring can be designed to be small, but the operating force is still discontinuous before and after the pilot valve contacts the pilot valve port. There is a problem that the operational feeling deteriorates. Also, if the spring constant of the buffering coil spring is designed to be small in order to reduce the change in operating force, the coil spring becomes very small and difficult to handle, and it is difficult to assemble the on-off valve device. is there.

  Furthermore, in the on-off valve device described in Japanese Patent No. 3632976, when the on-off valve device is in a water-stopped state, the buffer coil spring is in the most compressed state. For this reason, since the coil spring is maintained in a compressed state for a long time, there is a problem in that the durability of the spring is lowered.

  In the on-off valve device described in Japanese Patent No. 3632976, the buffer coil spring is disposed so as to engage with the lower end of the push rod, so that the mechanism for moving the pilot valve becomes vertically long. There is a problem that the entire apparatus becomes large.

Accordingly, an object of the present invention is to provide an on-off valve device having a smooth operation force and a good operation feeling.
Another object of the present invention is to provide a highly durable on-off valve device.
Furthermore, an object of the present invention is to provide an on-off valve device that can be made compact.

  In order to solve the above-described problems, the present invention is an on-off valve device used for a hot-water and water-mixing faucet that mixes hot water and water at an appropriate temperature, and stops and discharges the mixed water. Diaphragm type main valve body provided, valve seat on which the surface of the main valve body is seated and separated, pilot valve that opens and closes the pressure release hole, this pilot valve is disposed inside, and the pilot valve is pressure released When the hole is closed, the internal pressure increases and the main valve body moves toward the valve seat, and the pilot chamber is placed in this pressure chamber and the pilot valve is energized to close the pressure release hole. A pilot valve urging means for operating, an operation part moved between a water discharge position and a water stop position by a user's pressing operation, and when the operation part is moved to the water discharge position, the pilot valve is energized Pressure release hole against the urging force of the means It is characterized by having a pilot valve opening means for separating et.

  In the present invention configured as described above, when the user presses the operation unit at the water stop position once, the operation unit is moved to the water discharge position. When the operating portion is moved to the water discharge position, the pilot valve opening means pulls the pilot valve away from the pressure release hole against the urging force of the pilot valve urging means. When the pilot valve is pulled away from the pressure release hole and the pressure release hole is opened, the pressure in the pressure chamber decreases and the surface of the main valve element is separated from the valve seat. Thereby, the on-off valve device is in a water discharge state. In order to set the on-off valve device to the water stop state, the operation unit is pressed again to move the operation unit at the water discharge position to the water stop position. When the operation portion is moved to the water stop position, the pilot valve opening means does not act to pull the pilot valve away from the pressure release hole, and the pilot valve closes the pressure release hole by the biasing force of the pilot valve biasing means. Moved to position. When the pressure release hole is closed, the pressure in the pressure chamber rises, the main valve body is seated on the valve seat, and a water stop state is established.

  According to the present invention configured as described above, since the pilot valve always receives the urging force of the pilot valve urging means, the operation force for pressing the operation portion is less likely to be uneven, and the on-off valve device The operability can be improved. Further, according to the present invention configured as described above, the period during which the pilot valve is moved against the urging force of the pilot valve urging means is only during the water discharge state. The time during which a large force is applied is short, and the durability of the pilot valve urging means can be improved.

In the present invention, preferably, the pilot valve opening means has a rod member that is slidably engaged with the pilot valve, and the rod member is interlocked with the operation portion, and the operation portion is moved to the water discharge position. Engage with the pilot valve to pull the pilot valve away from the pressure release hole.
According to the present invention configured as described above, the pilot valve opening means can be configured with a simple structure.

In the present invention, preferably, the pilot valve urging means is a coil spring, and this coil spring is compressed when the operating portion is at the water discharge position and extends when it is at the water stop position.
According to the present invention configured as described above, the coil spring is compressed when the operation unit is at the water discharge position, expands in the water stop state, and returns to a state closer to the natural length of the coil spring than in the water discharge state. . For this reason, since the period during which the coil spring is maintained in a state close to the natural length is much longer than the period during which the coil spring is compressed, the durability of the coil spring can be improved.

In the present invention, preferably, two rod members are arranged in parallel, and the pilot valve biasing means is arranged between these rod members.
According to the present invention configured as described above, the on-off valve device can be configured to be shorter than the case where the rod member and the pilot valve urging means are arranged in series, and the on-off valve device can be downsized. Can do.

In the present invention, preferably, a rod member is disposed inside the pilot valve biasing means.
According to the present invention configured as described above, the on-off valve device can be configured to be shorter than the case where the rod member and the pilot valve urging means are arranged in series, and the on-off valve device can be downsized. Can do.

According to the on-off valve device of the present invention, the change in the operating force can be smoothed and the operational feeling can be improved.
Moreover, according to the on-off valve device of the present invention, the durability can be improved.
Furthermore, according to the present invention, the on-off valve device can be made compact.

Next, an on-off valve device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, an on-off valve device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a hot and cold water mixing faucet incorporating an on-off valve device according to a first embodiment of the present invention. 2 is a perspective sectional view showing a water stop state of the on-off valve device according to the first embodiment of the present invention, and FIG. 3 is a perspective sectional view showing a water discharge state. FIG. 4 is a side view showing a heart cam groove used in a heart cam mechanism which is a latch mechanism.

  As shown in FIG. 1, the hot and cold water mixing faucet 1 incorporating the on-off valve device according to the first embodiment of the present invention is provided so as to protrude from the wall surface 2 that is the installation surface of the hot and cold water mixing faucet 1. This hot-water / water-mixing faucet 1 includes a plate-like heat insulating cover 4 which is a part of the water faucet body. The heat-insulating cover 4 includes a temperature adjusting dial 6, a curan water push button 8, and shower water discharge water. Each of the shower push buttons 10 is provided. The hot and cold water mixing tap 1 is covered with a heat insulating cover 12 on the lower surface side.

A desired water temperature is set by the temperature adjustment dial 6, the mixing ratio of hot water and water is adjusted, and water is discharged at an appropriate temperature. Further, by operating the curan push button 8, water is discharged from the curan, and by operating the shower water discharge push button 10, shower water is discharged from the shower head.
Further, each of the curan push button 8 and the shower push button 10 is provided with a slip stopper 14 having a convex portion or the like.

In the vicinity of the front lower surface side of the hot and cold water faucet 1, a currant water discharge port 16 and a shower water discharge port 18 are provided. A shower hose 20 communicating with a shower head (not shown) is connected to the shower outlet 18.
Moreover, although those one part is shown by FIG. 2 on the right side surface and the left side surface of the hot / cold water faucet 1, the adjustment part of the stop cock 22, a filter, and a check valve (each not shown) Maintenance port is provided. The one on the right side is for water flowing into the hot and cold water mixing faucet 1, and the one on the left side is for hot water.

A connecting portion (not shown) for connecting a water supply pipe (not shown) and a hot water supply pipe (not shown) is provided on the wall fixing surface of the hot-water mixed tap 1.
The user sets a desired temperature with the temperature adjustment dial 6 and immediately presses the push button 8 for currant water to obtain water spouting water, or presses the push button 10 for shower water to obtain shower water spouting. The water discharge of the mixed water of desired temperature can be obtained. Then, when the push buttons 8 and 10 are pressed again, the water is stopped.

  The flow of hot water in the hot water / water mixing faucet 1 at this time will be described. First, hot water flowing into the hot water / water mixing faucet 1 from a water supply pipe and a hot water supply pipe (not shown) is used for hot water and water, respectively. It is throttled to an appropriate flow rate by the provided stop cock 22, passes through a filter and a check valve (not shown) respectively for hot water and water, and flows into a temperature control valve (not shown). To do. The temperature control valve is a thermostat type hot and cold water mixing valve. Hot water and water are automatically adjusted to a desired set temperature, and the hot and cold water mixture flows out of the temperature control valve. Thereafter, the hot / cold water is discharged from the curan and the shower nozzle through the on-off valve device (not shown in FIG. 1) according to the embodiment of the present invention provided for each of the curan and the shower.

Next, with reference to FIG.2 and FIG.3, the on-off valve apparatus by 1st Embodiment of this invention incorporated in the hot-water mixed tap 1 mentioned above is demonstrated.
As shown in FIGS. 2 and 3, the on-off valve device 32 includes an operation unit 36, an operation force transmission member 37 fitted inside the operation unit 36, and a pilot disposed inside the operation force transmission member 37. And a valve support member 39. Further, the on-off valve device 32 is disposed below the pilot valve support member 39, and a main valve body pressing member 41 forming a pressure chamber, and a valve pedestal member disposed below the main valve body pressing member 41. 52 and a cover 60 that surrounds the above-described members and restrains each member at a predetermined position.

  A main valve body 46 is sandwiched between the main valve body pressing member 41 and the valve seat member 52, and the main valve body 46 is positioned at a predetermined position. On the central axis of the operating force transmission member 37, a rod member 38, which is a pilot valve opening means, is attached downward, and this rod member 38 moves up and down in conjunction with the operating portion 36. Further, the bar member 38 is inserted into a pilot valve support member 39 disposed inside the operation force transmission member 37. A pilot valve 40 slidably engaged with the rod member 38 is provided at the lower end of the rod member 38. The pilot valve 40 is slidably supported by a pilot valve support member 39, and a packing 40a is attached to the tip thereof.

The operation portion 36 has a substantially cylindrical shape with its upper end closed, and a convex portion 36a with which the back surface of the curan push button 8 or the shower push button 10 abuts is formed at the top. A step portion 36 b is formed on the outer periphery of the lower portion of the operation portion 36, and a shoulder portion 36 c is formed on the lower inner periphery of the operation portion 36.
The operation force transmission member 37 has a substantially cylindrical shape, is received inside the operation unit 36, and moves up and down together with the operation unit 36. Further, the upper portion of the pilot valve support member 39 is received inside the operation force transmission member 37. Further, a pin member 64 constituting a heart cam mechanism is attached to the upper end surface of the operating force transmission member 37. The heart cam mechanism which is a latch mechanism will be described later.

  The pilot valve support member 39 has an upper portion having a substantially rectangular cross section and a generally disc-shaped flange portion formed below the upper portion. The upper part is slidably received in the operating force transmission member 37. Further, on both side surfaces of the upper portion, heart cam grooves 39a are formed for receiving the end portions 64a of the pin member 64 bent in a gate shape. On the central axis of the pilot valve support member 39, a bore 39b extending upward from the lower end of the pilot valve support member 39 is formed. Further, an urging spring 69 is disposed between the collar portion of the pilot valve support member 39 and the shoulder portion 36c of the operation portion 36, and the operation portion 36 is attached to the pilot valve support member 39 upward. It is fast.

  The main valve body pressing member 41 has a substantially cylindrical shape, and a hole for receiving the lower portion of the pilot valve support member 39 is formed on the upper end surface. A packing 41a is disposed between the pilot valve support member 39 and the main valve body pressing member 41 to maintain water tightness in the pressure chamber. Furthermore, an annular groove 41 b for pressing the main valve body 46 is formed on the lower end surface of the main valve body pressing member 41.

  The main valve body 46 is generally disc-shaped, a pressure release hole 44 is formed at the center thereof, and a diaphragm portion 46a is formed at the outer peripheral portion. The outermost peripheral portion of the diaphragm portion 46a is received in an annular groove 41b formed in the lower end surface of the main valve body pressing member 41, and water tightness between the main valve body 46 and the main valve body pressing member 41 is ensured. Has been. Further, a hole 46 b through which the cleaning pin 58 is passed is formed at one place on the circumference of the main valve body 46. The cleaning pin 58 is disposed so as to penetrate the hole 46b of the main valve body 46, and prevents the hole 46b from being clogged.

  The valve seat member 52 has a double cylindrical shape connected at the lower portion, and is disposed below the main valve body pressing member 41. Four inflow ports 52 a into which water flows are formed on the side surface of the outer cylinder, and the main valve body 46 is sandwiched between the upper end portion of the outer cylinder and the lower end surface of the main valve body pressing member 41. . The upper end of the inner cylinder is formed as a valve seat 52b on which the main valve body 46 is seated. The water flowing in from the inflow port 52a once rises upward, passes between the valve seat 52b and the main valve body 46, enters the inner cylinder, and flows out from the lower end of the inner cylinder. .

  The cover 60 has a stepped cylindrical shape with an expanded lower side. An edge portion 60 a is formed at the upper end of the cover 60, and a stepped portion 36 b outside the operation portion 36 received inside the cover 60 is engaged with the edge portion 60 a. In addition, elongated holes 60b are formed at two positions on the side surface of the cover 60 so as to receive the claw portions 39c protruding outward from the two positions on the side surface of the pilot valve support member 39. Further, long holes 60 c are formed in two places below the cover 60. The long hole 60c is configured to receive a claw portion 52c protruding outward from two locations on the upper side surface of the valve seat member 52. The long holes 60b and 60c receive the claw portions 39c and 52c, respectively, so that the pilot valve support member 39, the main valve body pressing member 41, and the valve base member 52 are held at appropriate positions in the cover 60.

  The operation unit 36 is held by the cover 60 so as to be movable in the vertical direction. In addition, the operation force transmission member 37 is allowed to move in the vertical direction with respect to the cover 60 together with the operation unit 36. Further, movement of the pilot valve support member 39 received in the operation force transmission member 37 relative to the cover 60 is restricted. Therefore, when the operating portion 36 is pressed, the operating force transmission member 37 is lowered together with the operating portion 36, and the urging spring 69 disposed between the operating portion 36 and the pilot valve support member 39 is compressed.

  The upper end of the rod member 38 is attached to the center of the operating force transmission member 37, and the lower end extends into the bore 39 b of the pilot valve support member 39. An O-ring 54 is disposed between the rod member 38 and the pilot valve support member 39 to ensure water tightness inside the pressure chamber. An extended portion 38 a is formed at the lower end of the bar member 38.

  The pilot valve 40 has a substantially cylindrical shape and is disposed in the bore 39 b of the pilot valve support member 39. A hollow portion 40b is formed in the pilot valve 40, and the hollow portion 40b slidably receives the extended portion 38a at the lower end of the rod member 38. A pilot valve biasing spring 42 as a pilot valve biasing means is disposed on the outer periphery of the upper portion of the pilot valve 40, and biases the pilot valve 40 downward with respect to the pilot valve support member 39. The pilot valve biasing spring 42 is configured as a coil spring, and the pilot valve 40 and the rod member 38 are disposed on the inside thereof. A packing 40 a is attached to the lower end of the pilot valve 40. When the pilot valve 40 is pushed down, the packing 40a comes into contact with the main valve body 46 and closes the pressure release hole 44.

  In the present embodiment, the space surrounded by the upper surface of the main valve body 46, the inner wall surface of the main valve body pressing member 41, and the inner wall of the bore 39b of the pilot valve support member 39 acts as a pressure chamber. . Between the main valve body 46 and the main valve body pressing member 41, the outermost peripheral portion of the diaphragm portion 46 a of the main valve body 46 is fitted into the annular groove 41 b of the main valve body pressing member 41, thereby providing water tightness. It is secured. Further, the water tightness between the main valve body pressing member 41 and the pilot valve support member 39 is secured by the packing 41a, and the water tightness between the bore 39b of the pilot valve support member and the rod member 38 is secured by the O-ring 54.

  Next, the heart cam mechanism will be described with reference to FIG. The heart cam mechanism includes a heart cam groove 39 a formed on both side surfaces of the upper side portion of the pilot valve support member 39 and a pin member 64 held by the operation force transmission member 37. FIG. 4 is an enlarged view of the heart cam groove 39 a formed on both side surfaces of the upper side portion of the pilot valve support member 39. In the heart cam mechanism, both end portions 64a bent inside the lower end of the pin member 64 take various positions in the heart cam groove 39a, thereby holding the operation portion 36 in a predetermined position. First, when the on-off valve device 32 is in a water stop state, the end portion 64a of the pin member 64 is held at the position A of the heart cam groove 39a.

  Next, when the operating portion 36 is pushed down to the maximum pushing position against the urging force of the urging spring 69, the pin member 64 is pushed down together with the operating portion 36, and the end portion 64a of the pin member 64 is formed in the heart cam groove 39a. Move to position B below. When the hand is released from the operation unit 36 in this state, the operation unit 36 is pushed up to a position where the stepped portion 36b outside the operation unit 36 and the edge 60a of the cover 60 are engaged by the biasing force of the biasing spring 69. It is done. At this time, the end portion 64a of the pin member 64 moves to a position C above the heart cam groove 39a, and the on-off valve device 32 enters a water discharge state. When the operation part 36 is pushed down to the maximum pushing position against the urging force of the urging spring 69 from this water discharge state, the pin member 64 is pushed down together with the operation part 36, and the end part 64a of the pin member 64 has a heart cam. It moves to the position of D below the groove 39a. If the hand is released from the operating portion 36 in this state, the operating portion 36 is pushed upward by the biasing force of the biasing spring 69. At this time, the end portion 64a of the pin member 64 is moved to the A of the heart cam groove 39a. Since it is held at the position, the operation unit 36 is also held at this position and enters a water-stopping state.

Next, the operation of the faucet device 1 incorporating the on-off valve device 32 according to the first embodiment of the present invention will be described.
First, in the water stop state of the on-off valve device 32 shown in FIG. 2, the end portion 64a of the pin member 64 is held at the position A of the heart cam groove 39a. The curaning push button 8 or the shower push button 10 to be in contact is in a retracted state. In this position, the packing 40 a of the pilot valve 40 is in contact with the main valve body 46 and closes the pressure release hole 44. In the state where the pressure release hole 44 is closed, the water flowing into the pressure chamber from the inlet 52a through the hole 46b cannot flow out, so the pressure in the pressure chamber becomes high, and the main valve body 46 is The on-off valve device 32 is closed by being pressed against the seat 52b.

  Next, when the curan push button 8 is once pressed and released, the operation portion 36 of the on-off valve device 32 disposed below the curan push button 8 is similarly pushed. By this pressing operation, the end portion 64a of the pin member 64 of the on-off valve device 32 moves to the position C of the heart cam groove 39a, and the operation portion 36 also moves to the upper water discharge position as shown in FIG. At this time, the currant push button 8 that is in contact with the operation unit 36 is also protruded. In this state, the bar member 38 attached to the operation force transmission member 37 is also pulled upward together with the operation unit 36. When the rod member 38 is pulled upward, the pilot valve 40 that engages with the expanded portion 38 a at the lower end of the rod member 38 is also lifted upward together with the rod member 38 against the biasing force of the pilot valve biasing spring 42. When the pilot valve 40 is pulled upward, the packing 42 of the pilot valve 40 is pulled away from the main valve body 46 and the pressure release hole 44 is opened. In the state where the pressure release hole 44 is opened, the water flowing into the pressure chamber through the hole 46b flows out through the pressure release hole 44, so that the pressure in the pressure chamber decreases. When the pressure in the pressure chamber decreases, the force for pressing the main valve body 46 against the valve seat 52b does not act, and the main valve body 46 moves upward. When the main valve body 46 moves away from the valve seat 52b and the on-off valve device 32 opens, the water that flows in from the inflow port 52a flows downward through the valve seat 52b and is discharged from the currant spout 16.

Next, when the currant push button 8 is pressed again in the water discharge state, the end portion 64a of the pin member 64 moves to the position A of the heart cam groove 39a, and the operation portion 36 is also moved downward as shown in FIG. Move to the water stop position. At this time, the curan push button 8 that contacts the operation unit 36 is also retracted. In this state, since the rod member 38 is also pushed down together with the operation portion 36, the pilot valve 40 engaged with the expansion portion 38a of the rod member 38 is also moved downward by the biasing force of the pilot valve biasing spring 42. Is done. When the pilot valve 40 is moved downward, the pressure release hole 44 of the main valve body 46 is closed by the packing 40 a of the pilot valve 40. In a state where the operation portion 36 is greatly lowered by the water stop operation, the packing 40a is pressed against the main valve body 46 by the urging force of the pilot valve urging spring 42, so that the main valve body 46 is moved downward. Even if it moves, there is no gap between the packing 40a and the main valve body 46, and the state where the pressure release hole 44 is closed is maintained. When the pressure release hole 44 is closed, the pressure in the pressure chamber is increased, so that the main valve body 46 is pushed downward to be completely seated on the valve seat 52b, and the water is stopped.
In addition, when the shower push button 10 is pressed, the on-off valve device disposed below the shower push button 10 acts in the same manner to stop water from a shower head (not shown). Water discharge is switched.

  Next, the operation of the heart cam mechanism will be described with reference to FIG. First, when the on-off valve device 32 is in the water stop state shown in FIG. 2, the end portion 64a of the pin member 64 is held at the position A of the heart cam groove 39a. In this state, the expansion portion 38 a of the rod member 38 and the pilot valve 40 are not engaged, and the pilot valve 40 is brought into contact with the main valve body 46 by the biasing force of the pilot valve biasing spring 42. At this time, the pilot valve biasing spring 42 is in a state of being slightly compressed from its natural length. Next, in a state where the operation portion 36 is pressed and the operation portion 36 is pushed in to the maximum, the end portion 64a of the pin member 64 is moved to the position B of the heart cam groove 39a. In this state, the rod member 38 moves to the position where it is lowered most downward, but the pilot valve 40 does not move, and therefore the length of the pilot valve biasing spring 42 does not change. That is, the stroke of the rod member 38 that moves downward together with the operation portion 36 is absorbed by the slide of the rod member 38 with respect to the pilot valve 40, so that the rod member 38 does not directly press the main valve body 46. Absent.

  Next, when the force that presses the operation portion 36 is removed, the operation portion 36 is pushed upward by the urging force of the urging spring 69, and the end portion 64a of the pin member 64 is positioned at the position C of the heart cam groove 39a. Moved. In the middle of the transition to this state, the extended portion 38a of the rod member 38 and the pilot valve 40 are engaged, and the rod member 38 pulls the pilot valve 40 upward while compressing the pilot valve biasing spring 42. In this state, as shown in FIG. 3, the rod member 38 moves to the highest position, and the pilot valve biasing spring 42 is compressed between the pilot valve 40 and the pilot valve support member 39 to the maximum, The valve 40 leaves the main valve body 46 and enters a water discharge state.

  In a state where the end portion 64a of the pin member 64 is at the position C of the heart cam groove 39a, when the operation portion 36 is pressed to make the water stop state, the operation force transmission member 37 is moved downward together with the operation portion 36. . Accordingly, the bar member 38 is lowered, and the pilot valve 40 is also moved downward by the urging force of the pilot valve urging spring 42. When the pilot valve 40 that moves downward together with the rod member 38 contacts the main valve body 46, the engagement between the expansion portion 38a of the rod member 38 and the pilot valve 40 is released, and only the rod member 38 moves downward. (However, in this state, the pilot valve 40 moves downward while contacting the main valve body 46 so as to follow the movement of the main valve body 46). Further, when the operation portion 36 is pressed and the operation portion 36 is pushed in to the maximum, the end portion 64a of the pin member 64 is moved to the position D of the heart cam groove 39a. In this state, the rod member 38 moves to the position where it is lowered to the lowest position. However, since the rod member 38 slides with respect to the pilot valve 40, the main valve body 46 is not directly pushed by the rod member 38. . Next, when the force that presses the operation portion 36 is removed, the operation portion 36 is pushed upward by the urging force of the urging spring 69, and the end portion 64 a of the pin member 64 is positioned at the position A of the heart cam groove 39 a. It is moved and held, and the water stop state is maintained.

According to the on-off valve device according to the first embodiment of the present invention, the pilot valve always receives the urging force of the pilot valve urging spring, so that the operation force for pressing the operation portion is less likely to be uneven, The operability of the on-off valve device can be improved.
Further, according to the on-off valve device of the present embodiment, the pilot valve biasing spring is compressed when the on-off valve device is in the water discharge state, and in the water stop state, the pilot valve biasing spring expands and becomes more natural length. Stay close. For this reason, the time for greatly compressing the pilot valve biasing spring is short, and the durability of the pilot valve biasing spring can be improved.
Furthermore, according to the on-off valve device of the present embodiment, since the rod member is arranged inside the pilot valve biasing spring, the on-off valve device is more effective than the case where the rod member and the pilot valve biasing spring are arranged in series. The on-off valve device can be reduced in size.

  Next, with reference to FIGS. 5 to 16, a faucet device incorporating an on-off valve device according to a second embodiment of the present invention will be described. The on-off valve device according to the second embodiment of the present invention is different from the first embodiment in that the water discharge flow rate can be mainly adjusted.

  FIG. 5 is a perspective view showing the entire faucet device incorporating the on-off valve device according to the second embodiment of the present invention. FIG. 6 is a perspective view of a head portion incorporating the on-off valve device according to the present embodiment, and FIG. 7 is a sectional view thereof. 8 is a top view of the on-off valve device incorporated in the head, FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8, and FIG. 10 is along the line XX in FIG. FIG. 11 and 12 are exploded perspective views of the on-off valve device.

  As shown in FIG. 5, a faucet device 200 with a built-in on-off valve device according to a second embodiment of the present invention includes a main body 201a installed on a sink or a washstand (not shown), and a main body 201a. It has a neck portion 201b that extends upward, and a head portion 202 that is disposed at the tip of the neck portion 201b. The main body 201a is provided with a temperature adjusting unit 206 for adjusting the temperature of hot water discharged, and the head unit 202 is provided with an operation knob 204 for switching between water stop and water discharge and adjusting the discharge flow rate. It has been. The neck portion 201b is formed in a so-called gooseneck shape that extends vertically upward from the main body portion 201a and then curves and extends downward.

  Furthermore, a water supply pipe 208a for supplying tap water to the main body 201a and a hot water supply pipe 208b for supplying hot water are connected to the lower part of the main body 201a. Further, pressure regulating valves 210a and 210b and check valves 212a and 212b are respectively arranged in the middle of the water supply pipe 208a and the hot water supply pipe 208b.

  The water and hot water supplied from the water supply pipe 208 a and the hot water supply pipe 208 b are appropriately mixed in the main body 201 a according to the setting of the temperature adjustment unit 206 and discharged from the tip of the head unit 202. Yes. Further, by pressing the operation knob 204 of the head unit 202, the water stop and water discharge from the head unit 202 can be switched. Furthermore, the water discharge flow rate can be adjusted by rotating the operation knob 204.

  In addition, a flexible hose (not shown) is connected to the base end of the head portion 202, and the user can freely hold the head portion 202 by grasping the head portion 202 and pulling out the flexible hose from the neck portion 201b. It becomes possible to move. Further, by rotating the shower switching operation unit 205a at the lower end of the head unit 202, the water discharged from the head unit 202 can be switched to shower or direct current.

Next, the head part 202 of the faucet device 200 and the on-off valve device built therein will be described with reference to FIGS.
As shown in FIGS. 6 and 7, the head portion 202 includes a head body portion 203 which is a faucet body, an on-off valve device 220 received in the head main body portion 203, and an operation of the on-off valve device 220. An operation knob 204 for operating the unit, and a shower switching unit 205 that causes the hot water that has passed through the on-off valve device 220 to flow out by shower or direct current. In this embodiment, the shower switching unit 205 functions as a spout unit and a shower head.

  The head main body 203 has a form in which a cylindrical operation portion is protruded from a curved tubular portion. A flexible hose (not shown) is connected to the base end 203a of the curved tubular portion, and the hot / cold water mixture flows from the base end 203a. In addition, a shower switching unit 205 is attached to the tip 203b of the curved tubular portion. Furthermore, an open / close valve device receiving portion 203c for receiving the open / close valve device 220 is formed in a cylindrical operation portion protruding from the curved tubular portion. A valve seat 203d, which is a valve seat for seating the main valve body 234 of the on-off valve device 220, is formed at the bottom of the on-off valve device receiving portion 203c. The hot water flowing in from the base end 203a of the head main body 203 reaches the tip 203b through the space between the main valve body 234 of the on-off valve device 220 and the valve seat 203d received by the on-off valve device receiving portion 203c. It is discharged as a shower or direct current by the switching unit 205.

The operation knob 204 has a generally cylindrical cap shape, is attached to the operation unit 222 of the on-off valve device 220, and is configured so that the user can perform a pressing operation and a rotation operation on the operation unit 222.
The shower switching unit 205 is attached to the tip of the head main body unit 203, and is configured so that the hot water discharged can be switched to shower or direct current by rotating the ring-shaped shower switching operation unit 205a. ing. In addition, the shower switching unit 205 includes a bypass valve 205b that bypasses the on-off valve device 220 and causes hot water to flow out when the pressure on the upstream side of the on-off valve device 220 abnormally increases.

  Next, an on-off valve device 220 according to a second embodiment of the present invention will be described with reference to FIGS. The on-off valve device 220 includes an operation unit 222, an operation unit pressing member 223 that surrounds the outer side of the operation unit 222, and an operation force transmission member that is disposed inside the operation unit 222 and moves in accordance with the operation of the operation unit 222. 224, an intermediate member 228 disposed inside the operation force transmission member 224, a pressure chamber forming member 226 disposed along the inner wall surface of the intermediate member 228, and disposed outside the operation portion pressing member 223. Cover 232 made.

  The on-off valve device 220 includes two rod members 238 which are pilot valve opening means attached to the operating force transmission member 224, a pilot valve 240 slidably engaged with these rod members 238, and A packing 242 attached to the tip of the pilot valve 240 and a main valve body 234 provided with a pressure release hole 234a opened and closed by the pilot valve 240 are provided. Further, the on-off valve device 220 includes a base member 230 for fixing the main valve body 234 between the intermediate member 228 and the main valve body 234. In this embodiment, the operating force transmission member 224 and the rod member 238 constitute a pilot valve moving mechanism.

  The operation portion 222 is formed in a substantially cylindrical shape with the upper end closed, and a cross-shaped raised portion 222a and four claw portions 222b disposed between the raised portions 222a are formed on the upper end surface. . The operation portion 222 is snapped to the operation knob 204 by the claw portion 222b, and the raised portion 222a is received in a groove (not shown) formed on the back side of the operation knob 204. The relative rotation of 222 is prevented. Further, a flange portion 222c protruding outward is formed at the lower end of the operation portion 222, and stopper projections 222d are formed at two locations on the circumference of the flange portion.

  Further, the operation portion pressing member 223 has a substantially cylindrical shape and is disposed so as to surround the operation portion 222. A flange portion 223a is formed at the lower end of the operation portion pressing member 223, and two protrusions 223b are formed at the upper end. In addition, a protruding portion 223c (FIG. 10) protruding inward is formed at the upper end of the operating portion pressing member 223, and the protruding portion 223c engages with the flange portion 222c of the operating portion 222, so that the operating portion 222 is prevented from jumping upward. Further, on the inner wall surface of the operation portion pressing member 223, stopper contact portions 223d (FIG. 10) which are elongated protrusions extending in the vertical direction are formed at two locations. The stopper abutting portion 223d engages with a stopper protrusion 222d formed on the flange portion 222c of the operating portion 222, thereby restricting the rotation of the operating portion 222 to a predetermined range. In the present embodiment, the stopper protrusion 222d and the stopper abutting portion 223d constitute rotation restricting means.

  The operating force transmission member 224 has a disk-shaped upper portion 224 a provided with a notch and four leg portions 224 b extending downward from the upper portion 224 a, and is disposed inside the operating portion 222. . The upper surface of the upper portion 224a is engaged with a cam 222f (FIG. 9) formed on the upper inner wall surface of the operation portion 222. When the operation portion 222 is rotated, an operation force is transmitted that slides on the cam 222f. The member 224 is configured to move up and down. A pin member 244 bent into a gate shape is attached to the upper portion 224a. Further, two bar members 238 are attached so as to extend downward from the upper portion 224a. Further, an urging spring 246 is disposed so as to contact the lower surface of the upper portion 224a, and urges the operating force transmission member 224 and the operating portion 222 to push upward with respect to the intermediate member 228. .

  The intermediate member 228 is disposed below the operation force transmission member 224 so as to be received between the leg portions 224 b of the operation force transmission member 224. The intermediate member 228 includes a cylindrical upper portion 228a having an oval cross section, a cylindrical second step portion 228b having a spline formed on the outer periphery, and a third step portion 228c having a diameter larger than that of the second step portion 228b. Have. The upper portion 228a is slidably received between the leg portions 224b of the operating force transmission member 224, whereby the intermediate member 228 and the operating force transmission member 224 are relatively movable in the vertical direction. The relative rotation between is restricted. Further, a heart cam groove 228d constituting a part of a heart cam mechanism that is a latch mechanism is formed on both planar side surfaces of the upper portion 228a. The distal end of the pin member 244 is received in the heart cam groove 228d, and the operation force transmission member 224 moves along the heart cam groove 228d, whereby the operation force transmission member 224 is held at a predetermined height. Further, the spline formed on the second step portion 228b is engaged with the spline formed on the inner peripheral portion of the lower end of the operation portion pressing member 223, and the relative rotational position of the operation portion pressing member 223 and the intermediate member 228 is changed. It is configured to be adjustable.

  The pressure chamber forming member 226 has a cylindrical upper portion 226 a having an oval cross section and a cylindrical lower portion 226 b formed on the lower side thereof, and is disposed along the inner wall surface of the intermediate member 228. ing. Two O-rings 252 are arranged between the upper surface of the pressure chamber forming member 226 and the ceiling surface of the intermediate member 228. These O-rings 252 are arranged to ensure water tightness between the two bar members 238 and the intermediate member 228 extending from the operating force transmission member 224 through the intermediate member 228 and the pressure chamber forming member 226. Yes.

  The main valve body 234 is positioned between the lower end of the intermediate member 228 and the pressure chamber forming member 226 and the upper end of the pedestal member 230 and forms a pressure chamber between the inner wall surface of the pressure chamber forming member 226. Is configured to do. The main valve body 234 is a generally disc-shaped diaphragm type valve body, and a pressure release hole 234a is provided at the center thereof, and a diaphragm portion 234b is provided at the outer periphery. The main valve body 234 is formed with a hole 234c through which upstream water flows, and the cleaning pin 250 is inserted through the hole 234c.

  The pilot valve 240 is a generally T-shaped member, and a recess 240a for receiving the pilot valve biasing spring 254 is formed at the center thereof. Further, holes are formed in the arm portions 240b on both sides of the T-shape, and the bar members 238 are respectively penetrated therein. Therefore, the pilot valve biasing spring 254 configured as a coil spring is disposed between the two rod members 238 disposed in parallel. The pilot valve biasing spring 254 that is a pilot valve biasing means has an upper end that is in contact with the ceiling surface of the pressure chamber forming member 226 and a lower end that is in contact with the bottom surface of the recess 240a. The valve biasing spring 254 is always biased downward. By this urging force, the packing 242 at the tip of the pilot valve 240 is brought into contact with the pressure release hole 234a of the main valve body 234, and the pressure release hole 234a is closed.

  The pilot valve 240 is arranged so as to be able to slide in the vertical direction along the two rod members 238 passing therethrough. Further, an extended portion 238a having an expanded diameter is formed at the tip of the rod member 238. When the rod member 238 is pulled upward, the expanded portion 238a and the pilot valve 240 are engaged. For this reason, when the rod member 238 is lifted upward together with the operating force transmission member 224, the expansion portion 238a of the rod member 238 and the pilot valve 240 are engaged, and the pilot valve 240 is subjected to the biasing force of the pilot valve biasing spring 254. It is lifted up against it. As a result, the pressure release hole 234a of the main valve body 234 is opened.

  The cover 232 has a substantially cylindrical shape and is disposed so as to surround the periphery of the operation unit pressing member 223. A plurality of vertical grooves 232 a that are vertical grooves are formed on the outer periphery of the cover 232. Further, a male screw thread is formed on the lower outer periphery of the cover 232, and this male screw thread is screwed into a female screw thread formed on the opening / closing valve device receiving part 203c of the head main body part 203. The on-off valve device 220 is fixed to the head main body 203. On the other hand, a cylindrical leaf spring 256 is attached to the inner side surface of the operation knob 204, and this leaf spring 256 surrounds the cover 232 at a position facing the click groove 232a. Bumps 256a bent so as to protrude inward are formed at two locations on the circumference of the leaf spring 256, and these bumps 256a are received in the click grooves 232a of the cover 232, respectively. . With this configuration, when the operation knob 204 is moved in the vertical direction with respect to the cover 232, the operation knob 204 can be moved with a weak force. However, in order to rotate the operation knob 204, the leaf spring 256 is elastically deformed. Since it is necessary to overcome the click groove 232a, a certain amount of operating force is required. For this reason, when the user rotates the operation knob 204, there is a feeling of clicking, and accidental rotation of the operation knob 204 is prevented. In the present embodiment, the click groove 232a and the leaf spring 256 constitute rotation resistance means.

  A spline 232 b is formed on the inner periphery of the cover 232. Further, an annular pressing member 248 is fitted into the upper portion of the cover 232, and a spline 248 a formed on the outer periphery of the pressing member 248 is configured to engage with the spline 232 b of the cover 232. In addition, notches 248b are formed at two locations on the circumference of the pressing member 248, and the protrusions 223b on the upper end of the operating portion pressing member 223 are received in these notches 248b. . With this configuration, relative rotation between the pressing member 248, the cover 232, and the operation unit pressing member 223 is prevented.

  Next, the pilot valve moving mechanism of the on-off valve device 220 will be described with reference to FIGS. 13 and 14. FIG. 13 is a graph showing the relationship between the distance between the main valve body 234 and the valve seat 203d and the flow rate of hot water flowing through the on-off valve device 220. FIG. 14 is a graph showing the relationship between the rotation angle of the operation knob 204 and the position of the pilot valve 240 in the on-off valve device 220 as a solid line, and the relationship between the rotation angle and the flow rate as a broken line.

  The on-off valve device 220 used in this embodiment adjusts the flow rate by continuously moving the pilot valve 240 up and down by the pilot valve moving mechanism and causing the main valve body 234 to follow the movement. As shown in FIG. 13, the flow rate of hot water flowing out from the on-off valve device 220 is not proportional to the distance between the main valve body 234 and the valve seat 203d. That is, in the region where the main valve body 234 and the valve seat 203d are close to each other, the flow rate rapidly increases when they are separated, and in the region where the main valve body 234 and the valve seat 203d are separated, the distance between them is Even if it changes, the flow rate does not change much. Therefore, if the pilot valve moving mechanism moves the pilot valve 240 in proportion to the rotation angle of the operation knob 204, the flow rate changes greatly with respect to the predetermined rotation angle of the operation knob 204 near the minimum flow rate, and the vicinity of the maximum flow rate. Then, the flow rate hardly changes with respect to a predetermined rotation angle. With such a configuration, it becomes difficult to finely adjust the discharge flow rate.

  Therefore, in the present embodiment, as shown by the solid line in FIG. 14, the movement of the pilot valve 240 with respect to the rotation angle of the operation knob 204 has a characteristic having a tendency opposite to that of the curve in FIG. The movement distance of the pilot valve 240 when the part 222 is operated at a predetermined rotation angle is configured to be different depending on the position of the pilot valve 240. Therefore, in this embodiment, the movement distance of the pilot valve 240 with respect to the predetermined rotation angle of the operation knob 204 is small near the minimum flow rate, and the movement distance with respect to the predetermined rotation angle is large near the maximum flow rate. With this configuration, as shown by the broken line in FIG. 14, the rotation angle of the operation knob 204 and the discharge flow rate become substantially proportional. Therefore, the amount of increase in the discharge flow rate with respect to the predetermined rotation angle of the operation knob 204 is substantially constant, and fine adjustment of the discharge flow rate is possible. Specifically, the curve of the cam 222f formed on the inner wall surface of the operation unit 222 is formed as shown by the solid line in FIG. That is, in the present embodiment, when the cam 222f is developed on a plane, the curve is as shown by a solid line in FIG.

  Next, with reference to FIG. 5, FIG. 7, FIG. 15, and FIG. 16, the operation of the faucet device 200 incorporating the on-off valve device 220 according to the second embodiment of the present invention will be described. FIG. 7 shows a case where the on-off valve device 220 built in the faucet device 200 is in a water stop state. FIG. 15 shows a case where the on-off valve device 220 is in a water discharge state and the discharge flow rate is maximized, and FIG. 16 shows a case where the discharge flow rate is reduced to some extent.

  First, in the water stop state of the on-off valve device 220 shown in FIG. 7, the operation unit 222 is held at the water stop position lowered by the heart cam mechanism, and the bar member 238 interlocked with the operation unit 222 is also in the lowered position. . Since the operation of the heart cam mechanism is the same as that of the first embodiment, description thereof is omitted. When the rod member 238 is lowered, the expanded portion 238 a and the arm portion 240 b of the pilot valve 240 do not engage with each other, and the packing 242 of the pilot valve 240 is pressed against the main valve body 234 by the biasing force of the pilot valve biasing spring 254. It is done. When the packing 242 is pressed against the main valve body 234 and the pressure release hole 234a of the main valve body 234 is closed, the pressure in the pressure chamber increases due to the pressure of hot water flowing through the hole 234c. The main valve body 234 is moved downward by this pressure and is seated on the valve seat 203d. Thereby, a water stop state is maintained.

  Next, when the operation knob 204 is pressed once, the holding by the heart cam mechanism is released, and the operation force transmission member 224 and the operation unit 222 and the bar member 238 interlocked therewith are moved upward by the biasing force of the biasing spring 246. To the water discharge position (FIG. 15). When the rod member 238 is pulled up, the extension portion 238a at the tip thereof and the arm portion 240b of the pilot valve 240 are engaged, and the pilot valve 240 is also lifted upward against the biasing force of the pilot valve biasing spring 254. When the pilot valve 240 is pulled up, the packing 242 is separated from the main valve body 234, and the pressure release hole 234a is opened. Thereby, the pressure in the pressure chamber decreases, and the main valve body 234 is separated from the valve seat 203d.

  When the main valve body 234 is separated, the tap water supplied to the water supply pipe 208a flows into the temperature adjustment unit 206 through the pressure regulating valve 210a and the check valve 212a. On the other hand, the tap water supplied to the hot water supply pipe 208b flows into the temperature adjustment unit 206 through the pressure regulating valve 210b and the check valve 212b. The temperature adjustment unit 206 changes the cross-sectional area of the channel through which water and hot water are introduced according to the setting of the dial, thereby changing the mixing ratio of water and hot water. The water and hot water that have flowed into the temperature adjustment unit 206 are mixed at a ratio corresponding to the setting of the dial of the temperature adjustment unit 206 and adjusted to an appropriate temperature. In the water faucet device 200, water and hot water flow into the temperature adjusting unit 206 through the pressure regulating valves 210a and 210b, respectively. Therefore, the supply pressure of water and hot water is substantially equal, and the ratio of the flow rate of water and hot water into Is proportional to the ratio of their cross-sectional areas. For this reason, the temperature adjustment range that can be set by the temperature adjustment unit 206 is very wide.

  The hot water adjusted to an appropriate temperature by the temperature adjusting unit 206 reaches the head unit 202 through the neck 201b, and passes between the valve seat 203d in the head main body unit 203 and the main valve body 234. Hot water that has passed between the valve seat 203d and the main valve body 234 flows into the shower switching unit 205 and is discharged from the head unit 202 as a shower or direct current.

  When adjusting the discharge flow rate, the operation knob 204 is rotated. FIG. 15 shows a state in which the discharge flow rate of the on-off valve device 220 is maximized. When the discharge flow rate is decreased from this state, the operation knob 204 is rotated clockwise. When the operation knob 204 is rotated, the operation unit 222 fixed thereto is similarly rotated. The operating force transmission member 224 engaged with the cam 222f on the inner wall surface of the operating portion 222 can slide in the vertical direction, but its rotation is restricted. For this reason, the operating force transmission member 224 is moved downward along the cam 222f when the operating portion 222 is rotated clockwise. When the operating force transmission member 224 is moved downward, the bar member 238 attached thereto is also lowered. When the rod member 238 is lowered, the pilot valve 240 is lowered by the urging force of the pilot valve urging spring 254 while maintaining the state in which the arm portion 240b and the extended portion 238a of the rod member 238 are engaged (FIG. 16). ). Following the descending of the pilot valve 240, the main valve body 234 also descends and the discharge flow rate decreases.

  Here, an operation in which the main valve body 234 is moved so as to follow the movement of the pilot valve 240 will be described. When the pilot valve 240 is moved downward by rotating the operation portion 222, the packing 242 of the pilot valve 240 approaches the pressure release hole 234a of the main valve body 234, so that the water flowing into the pressure chamber is pressurized. It becomes difficult to flow out through the opening hole 234a. When the water in the pressure chamber becomes difficult to flow out, the pressure in the pressure chamber rises, so that the main valve body 234 is pushed downward and moved by the pressure in the pressure chamber. Further, when the pilot valve 240 is moved downward, the gap between the packing 242 and the pressure release hole 234a of the pilot valve 240 is reduced again, so that the pressure in the pressure chamber rises and the main valve body 234 is moved downward. The In the present specification, the degree of size of the gap between the packing 242 of the pilot valve 240 and the pressure release hole 234a is called the opening degree of the pressure release hole 234a.

  As described above, when the pilot valve 240 is continuously moved downward by rotating the operation unit 222, the main valve body 234 maintains a minute gap between the pilot valve 240 and the packing 242. However, it is continuously moved downward. Further, when the operation unit 222 is suddenly rotated and the pilot valve 240 is suddenly moved downward, the packing 242 of the pilot valve 240 may come into contact with the pressure release hole 234a. In this case, the pressure in the pressure chamber also rises, whereby the main valve body 234 is moved downward, so that a gap is again formed between the packing 242 and the pressure release hole 234a. Therefore, when the operation unit 222 is rotated and the pilot valve 240 is moved downward, the main valve body 234 is not pushed downward by the pilot valve 240 but is moved downward mainly by the force due to the pressure in the pressure chamber. The For this reason, the pilot valve 240 can be moved downward by a very small operating force.

  Further, when the pilot valve 240 is moved upward by rotating the operation unit 222 in the reverse direction, the gap between the packing 242 of the pilot valve 240 and the pressure release hole 234a becomes large, so The pressure drops and the main valve body 234 is moved upward. Therefore, when the pilot valve 240 is continuously moved upward, the main valve body 234 is continuously moved upward while maintaining a minute gap with the packing 242 of the pilot valve 240. . Since the cam 222f is formed in the curve shown by the solid line in FIG. 14, the rotation angle of the operation knob 204 and the discharge flow rate are substantially proportional.

  When the operation knob 204 is further rotated clockwise from the state shown in FIG. 16, a stopper protrusion 222d formed on the outer periphery of the operation portion 222 and a stopper abutting portion 223d formed on the inner wall surface of the operation portion pressing member 223. Are engaged, and the operation knob 204 is prevented from rotating. In this embodiment, even when the operation knob 204 is rotated and the discharge flow rate is reduced to the minimum, water is discharged about 1 liter per minute. Note that the positioning of the pilot valve 240 for realizing such a small amount of water discharge requires high accuracy, as is apparent from the relationship between the main valve body-valve seat distance and the flow rate shown in FIG.

  In the on-off valve device 220 in the present embodiment, the positioning of the pilot valve 240 at the minimum flow rate can be adjusted. That is, the intermediate member 228 and the operation portion pressing member 223 are engaged by the splines formed on them, and the rotation position of the operation portion pressing member 223 is restricted. For this reason, the position of the stopper contact portion 223d formed on the inner wall surface can be adjusted by changing the engagement position by the spline and adjusting the rotation position of the operation portion pressing member 223 with respect to the intermediate member 228. . Therefore, when the pilot valve 240 is lowered to an appropriate position, the position of the stopper abutting portion 223d is set so that the stopper abutting portion 223d abuts on the stopper projection 222d of the operation portion 222 when the on-off valve device 220 is assembled. Adjust the flow rate to set the minimum flow rate. In the present embodiment, the splines formed on the intermediate member 228 and the operation part pressing member 223 function as a minimum water discharge flow rate setting means.

  Conversely, to increase the discharge flow rate, the main knob 234 is raised by rotating the operation knob 204 counterclockwise to raise the pilot valve 240. When switching to the water stop state, the operation knob 204 is pressed again to hold the operation unit 222 in the lowered water stop position. As a result, the pressure release hole 234a of the main valve body 234 is closed, and the main valve body 234 is seated on the valve seat 203d and enters a water-stopped state. At this time, since the rotation position of the operation unit 222 does not change, when the on-off valve device 220 is switched to the water discharge state next time, water is discharged at the previously set flow rate. Further, since the operation knob 204 is provided with a click stop mechanism by a leaf spring 256 attached to the operation knob 204 and a click groove 232a formed in the cover 232, accidental rotation of the operation knob 204 is prevented. The Further, when the operation portion 222 is pressed, the operation portion 222 can be prevented from being rotated by the action of the cam 222f engaged with the operation force transmission member 224.

According to the on-off valve device according to the second embodiment of the present invention, the pilot valve always receives the urging force of the pilot valve urging spring, so that the operation force for pressing the operation portion is less likely to be uneven, The operability of the on-off valve device can be improved.
Further, according to the on-off valve device of the present embodiment, the pilot valve biasing spring is compressed when the on-off valve device is in the water discharge state, and in the water stop state, the pilot valve biasing spring expands and becomes more natural length. Stay close. For this reason, the time for greatly compressing the pilot valve biasing spring is short, and the durability of the pilot valve biasing spring can be improved.
Furthermore, according to the on-off valve device of the present embodiment, since the pilot valve biasing spring is arranged between the two rod members, than the case where the rod member and the pilot valve biasing spring are arranged in series, The on-off valve device can be configured to be short, and the on-off valve device can be reduced in size.

Further, according to the on-off valve device of the present embodiment, the movement distance of the pilot valve when the operation knob is rotated by a predetermined angle is configured to vary depending on the position of the pilot valve. Even when the distance between and the water discharge flow rate is not proportional, the rotation angle of the operation unit and the water discharge flow rate can be substantially proportional.
Furthermore, according to the faucet device according to the present embodiment, since the rotation resistance means for preventing accidental rotation of the operation unit is provided, the operation unit is accidentally rotated by pressing operation of the operation unit. Thus, it is possible to prevent the setting of the water discharge flow rate from changing.
Further, according to the faucet device according to the present embodiment, since the minimum water discharge flow rate setting means for setting the water discharge flow rate when the water discharge flow rate is minimized is provided, the minimum water discharge flow rate can be set accurately. .

It is a perspective view of the hot and cold water mixing faucet incorporating the on-off valve device according to the first embodiment of the present invention. It is a perspective sectional view showing the water stop state of the on-off valve device by a 1st embodiment of the present invention. It is a perspective sectional view showing the water discharge state of the on-off valve device by a 1st embodiment of the present invention. It is a side view which shows the heart cam groove | channel currently used for the heart cam mechanism. It is a perspective view which shows the whole faucet apparatus incorporating the on-off valve apparatus by 2nd Embodiment of this invention. It is a perspective view of the head part of the faucet device incorporating the on-off valve device by a 2nd embodiment of the present invention. It is sectional drawing of the head part of the faucet device incorporating the on-off valve apparatus by 2nd Embodiment of this invention. It is a top view of the on-off valve device incorporated in the head part. It is sectional drawing cut | disconnected along the IX-IX line in FIG. It is sectional drawing cut | disconnected along the XX line in FIG. It is a disassembled perspective view of an on-off valve device. It is a disassembled perspective view of an on-off valve device. It is a graph which shows the relationship between the main valve body-valve seat distance, and the flow volume of hot water. It is a graph which shows the relationship between the rotation angle of an operation knob and the position of a pilot valve as a continuous line, and shows the relationship between a rotation angle and a flow volume as a broken line. It is sectional drawing which shows the state which made the on-off valve apparatus the water discharge state, and made discharge flow volume the maximum. It is sectional drawing which shows the state which made the on-off valve apparatus the water discharge state, and throttling the discharge flow rate to some extent. It is sectional drawing which shows the structure of the conventional pilot type on-off valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water and water mixing faucet 2 Wall surface 4 Heat insulation cover 6 Temperature adjustment dial 8 Callan push button 10 Shower push button 12 Heat insulation cover 14 Non-slip 16 Callan water discharge port 18 Shower water discharge port 20 Shower hose 22 Water stop valve 32 On-off valve device 36 according to the first embodiment 36 operation part 36a convex part 36b step part 36c shoulder part 37 operating force transmission member 38 bar member 38a expansion part 39 pilot valve support member 39a heart cam groove 39b bore 39c claw part 40 pilot valve 40a packing 40b Hollow part 41 Main valve body pressing member 41a Packing 41b Groove 42 Pilot valve biasing spring 44 Pressure release hole 46 Main valve body 46a Diaphragm part 46b Hole 52 Valve seat member 52a Inlet 52b Valve seat 52c Claw part 54 O-ring 58 Cleaning pin 60 Cover 6 a edge part 60b long hole 60c long hole 64 pin member 64a end part 69 biasing spring 200 faucet device incorporating the on-off valve device according to the second embodiment of the present invention 201a main body part 201b neck part 202 head part 203 head main body Portion 203a Base end 203b Tip 203c Opening / closing valve device receiving portion 203d Valve seat 204 Operation knob 205 Shower switching unit 205a Shower switching operation unit 205b Bypass valve 206 Temperature adjusting unit 208a Water supply pipe 208b Hot water supply pipe 210a, 210b Pressure regulating valve 212a 212b Check valve 220 On-off valve device 222 Operation part 222a Raised part 222b Claw part 222c Flange part 222d Stopper projection 222f Cam 223 Operation part pressing member 223a Flange part 223b Projection 223c Overhang part 223d Stopper -Contact portion 224 Operation force transmitting member 224a Upper portion 224b Leg portion 226 Pressure chamber forming member 228 Intermediate member 228a Upper portion 228b Second step portion 228c Third step portion 228d Heart cam groove 230 Base member 232 Cover 232a Click groove 232b Spline 234 Main valve body 234a Pressure release hole 234b Diaphragm part 234c hole 238 Bar member 238a Expansion part 240 Pilot valve 240a Recess 240b Arm part 242 Packing 246 Energizing spring 248 Holding member 248a Spline 250 Cleaning pin 252 O-ring 254 Pilot valve energizing spring 256 leaf spring 256a protuberance

Claims (5)

An on-off valve device used for a hot and cold water mixing faucet that mixes hot water and water at an appropriate temperature, and stops and discharges the mixed water.
A diaphragm type main valve body with a pressure release hole,
A valve seat on which the surface of the main valve body is seated and separated; and
A pilot valve that opens and closes the pressure release hole;
A pressure chamber in which the pilot valve is disposed, and when the pilot valve closes the pressure release hole, an internal pressure rises to move the main valve body toward the valve seat;
A pilot valve biasing means that is disposed in the pressure chamber and biases the pilot valve so that the pilot valve closes the pressure release hole;
An operation unit that is moved between a water discharge position and a water stop position by a user's pressing operation,
Pilot valve opening means for pulling the pilot valve away from the pressure release hole against the urging force of the pilot valve urging means when the operation portion is moved to the water discharge position;
And an on-off valve device.   The pilot valve opening means has a rod member slidably engaged with the pilot valve, and the rod member is interlocked with the operation portion, and the pilot portion is moved when the operation portion is moved to the water discharge position. 2. The on-off valve device according to claim 1, wherein the on-off valve device engages with a valve to pull the pilot valve away from the pressure release hole.   3. The on-off valve device according to claim 1, wherein the pilot valve urging means is a coil spring, and the coil spring is compressed when the operation portion is at the water discharge position and extends when the operation portion is at the water stop position.   The on-off valve device according to claim 2 or 3, wherein the two rod members are arranged in parallel, and the pilot valve urging means is arranged between the rod members.   4. The on-off valve device according to claim 2, wherein the rod member is disposed inside the pilot valve urging means.

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