JP2014181809A - Stop cock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stop cock device which suppresses deformation of a packing just before cutoff in the faucet device.SOLUTION: A stop cock device includes: a stop cock main body provided with an inflow channel and an outflow channel of water; and a stop cock member freely movable forward and backward for the stop cock main body, and the stop cock device is capable of opening and closing an inflow port formed on the downstream edge of an inflow channel by causing the stop cock member to move forward and backward. Therein, a packing made of elastomer is fastened to a position which is brought into contact with the circumference of the inflow port of the stop cock member, the contact surface which is brought into contact with the packing on the inflow port is flat and the packing has a seal surface which is brought into contact with the flat surface of the contact surface. Further, therein, a narrowing part is formed on a part in the flow direction of water proceeding from the inflow channel toward the outflow channel on a gap between the contact surface upon the opening of the inflow port and the seal surface.

Description

The present invention relates to a faucet comprising a valve seat disposed in the middle of a flowing water channel and a valve element that opens and closes on the outflow side of the valve seat.

  Conventionally, as described in Patent Document 1, a water faucet including a valve seat disposed in the middle of a flowing water channel and a valve body that opens and closes on the outflow side of the valve seat is known.

  In such a conventional faucet, the valve seat is composed of an inflow port, and the valve body is composed of an elastic material packing that is press-contactable with the inflow port, and the lower surface of the packing is positioned below. The water channel is closed by bringing it into pressure contact with the inflow port, and the water stop state is maintained. On the other hand, the lower surface of the packing is separated from the inflow port to open the flow channel and open the state.

JP 2001-81820 A

  However, in the faucet device described in Patent Document 1 described above, the abutting surface of the packing that abuts the packing and the inflow port is configured to be horizontal. The force which draws the packing which is a member to the valve seat side generate | occur | produces, and packing will deform | transform. Since the packing is deformed and pulled toward the valve seat side, the water flow area is reduced and the water discharge amount is reduced. In other words, when the distance between the packing and the inlet becomes closer than the predetermined position, the phenomenon that the packing is suddenly drawn occurs, the amount of water discharge decreases, and the packing blocks a part of the water passage, so the water discharge amount is finely adjusted. There is a problem that is difficult. In particular, it appears remarkably in the packing in which the surface pressed against the inlet is a horizontal surface. In addition, since the flow velocity becomes very fast, cavitation is likely to occur, and there is a risk that water-flowing noise will be generated.

  Then, this invention is made | formed in order to solve the problem of the prior art mentioned above, and it aims at providing the water stopper apparatus which suppresses the deformation | transformation of the packing just before water stop.

  In order to achieve the above object, the first invention includes a water faucet body provided with a water inflow channel and an outflow channel, a water faucet member that is movable forward and backward with respect to the water faucet body, A stop cock that can open and close an inlet formed at a downstream end of the inflow channel by moving the stop cock member forward and backward, and is in contact with the periphery of the inlet of the stopcock member. A packing made of an elastic body is fixed at a contact position, a contact surface that contacts the packing at the inlet is flat, and the packing has a seal surface that contacts the flat surface of the contact surface. In the water stop cock, a narrow portion is formed in a part of the gap between the contact surface and the seal surface when the inflow port is opened in a flow direction of water from the inflow channel to the outflow channel. It is the water stop cock device characterized by being formed.

  According to the first invention, by providing the narrowed portion in a part of the gap between the contact surface and the seal surface, it is possible to make only a part of the region where the flow path narrows immediately before water stoppage. Thereby, the area | region where a negative pressure generate | occur | produces can be narrowed, and the force concerning packing can be reduced. Therefore, deformation of the packing can be suppressed and the amount of discharged water can be adjusted stably. By further pressing the packing after the water stops, the entire surface comes into contact with the contact surface, and a face seal can be obtained.

  According to a second invention, in the first invention, the contact surface at the inlet is a flat surface perpendicular to the advancing / retreating direction of the water stopper member, and a part of the seal surface of the packing is the contact surface. The water faucet device is characterized in that the narrowed portion is formed by a shape close to the surface.

  According to the second invention, since the flat contact surface is orthogonal to the advance / retreat direction, when the water faucet member is advanced and retracted and the packing and the contact surface are contacted, a force is applied to the contact surface perpendicularly. Therefore, the force is not dispersed and the sealing performance is improved.

  According to a third aspect of the present invention, in the second aspect of the present invention, the water faucet device according to the second aspect is characterized in that at least a part of the sealing surface of the packing has an inclined shape gradually approaching toward the contact surface. .

  According to the third invention, since it has an inclined shape gradually approaching toward the contact surface, it is possible to efficiently suppress the generation of negative pressure. In addition, since water flows smoothly, the packing is not subjected to excessive force due to water pressure, and deterioration of the packing can be reduced.

  In a fourth aspect based on the third aspect, the sealing surface of the packing is inclined downward or upward from one end side to the other end side in the flow direction of water from the inflow channel to the outflow channel. It is the stop cock device characterized by having the shape which was made.

  According to the fourth invention, since the seal surface is inclined in the same direction from one end to the other end, generation of negative pressure can be suppressed more efficiently. In addition, since water flows smoothly, the packing is not subjected to excessive force due to water pressure, and deterioration of the packing can be reduced.

  It is possible to provide a water faucet device that suppresses deformation of the packing just before water stops.

It is a schematic perspective view which shows the water faucet device (hot-water mixed water faucet device) provided with the water stop cock device by one Embodiment of this invention. It is a disassembled perspective view of the water tap apparatus by one Embodiment of this invention. It is a plane sectional view of the water side leg member of the faucet device provided with the water faucet device of the water stop state by one embodiment of the present invention. It is a figure of the water flow state of FIG. It is a figure just before the water stop of FIG. FIG. 6 is an enlarged view of the vicinity of the packing and the contact surface of FIG. 5. It is sectional drawing of the packing of 1st embodiment of this invention. It is sectional drawing of the packing of 2nd embodiment of this invention. It is sectional drawing of the packing of 3rd embodiment of this invention. It is a graph which shows the relationship between the amount of water discharge of the packing of 1st embodiment of this invention, and the conventional packing, and a valve opening degree.

Hereinafter, embodiments of a water faucet device of the present invention and a water faucet device including the water faucet device will be described with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view showing a faucet device (a hot and cold water mixing faucet device 2) provided with a water faucet device 1 according to an embodiment of the present invention.
As shown in FIG. 1, a hot and cold water mixing device 2, which is a water faucet device provided with a stop cock device 1 according to an embodiment of the present invention, has a hot and cold water mixing device body 4. The apparatus main body 4 includes a hot water side inflow portion 6 and a water side inflow portion 8 projecting to the back side thereof, a spout 10 having a spout 10a formed at the tip, a shower hose 12, a temperature control device 14, and a spout of the spout 10. A currant / shower switching device 16 having a flow rate adjusting function capable of switching to currant water discharge by 10a or shower water discharge by the shower hose 12 is provided. The hot and cold water mixing device 2 having such a temperature control device 14 is called a so-called “thermostat mixing device”.

  The water faucet device 1 includes a hot water side water passage 22, a water side water passage 24, and a water faucet member 34, which will be described later.

Further, the water stopcock 3 is connected to the back side (upstream side) of the hot water side inflow portion 6 and the water side inflow portion 8 of the hot water / water mixing faucet body 4 and the water stopcock 3 is attached to each. A hot water side leg member 18 and a water side leg member 20 are provided as plug bodies, respectively. Inside the hot water side leg member 18 and the water side leg member 20, a hot water side water passage 22 and a water side water passage 24 are respectively provided. Is formed.
In addition, in this embodiment, although it is set as the water stop cock 3 provided with the pressure regulation function as an example, it is not specifically limited to this.
Moreover, since the structure of the hot water side leg member 18 and the water side leg member 20 is the same, description is abbreviate | omitted about the hot water side leg member 18 hereafter, and only the water side leg member 20 is demonstrated concretely.

Next, with reference to FIGS. 2 and 3, the details of the stop cock 3 of the present embodiment and the details of the water-side leg member 20 of the hot and cold water mixing faucet device 2 in which the stop cock 3 is incorporated will be specifically described. explain.
FIG. 2 is an exploded perspective view of the water stop cock 3 according to the first embodiment of the present invention. FIG. 3 is a water side of the water faucet apparatus having the water stop cock 3 in the water stop state according to the first embodiment of the present invention. It is a plane sectional view of a leg member. FIG. 4 is a view of the water passage state of FIG. FIG. 5 is a view just before the water stop in FIG. FIG. 6 is an enlarged view of the vicinity of the packing and the contact surface of FIG. FIG. 7 is a sectional view of the packing according to the first embodiment of the present invention. FIG. 8 is a cross-sectional view of the packing according to the second embodiment of the present invention. FIG. 9 is a sectional view of the packing according to the third embodiment of the present invention. FIG. 10 is a graph showing the relationship between the water discharge amount and the valve opening between the packing according to the first embodiment of the present invention and the conventional packing.

As shown in FIGS. 2 and 3, the water-side water passage 24 of the water-side leg member 20 is connected to a pipe (not shown) connected to a water supply source (not shown) such as a water supply. 20 to the outlet 24b formed in the downstream connection portion 28 of the water-side leg member 20 connected to the water-side inflow portion 8 of the hot-water mixing faucet body 4 The water-side leg member 20 is formed in a crank shape.
In addition, the water-side water passage 24 includes a primary-side water passage 30 that extends from the inlet 24a to the attachment chamber 24c to which the stop cock 3 is attached, and water from the attachment chamber 24c of the water-side water passage 24 toward the downstream side. The secondary leg water passage 32 extends toward the front outlet 24b after extending a predetermined distance substantially parallel to the front surface 20a and the back surface 20b of the side leg member 20.

  Next, as shown in FIG. 2, the stop cock 3 is attached to a predetermined attachment portion 20c of the water-side leg member 20 forming the attachment chamber 24c of the water-side water passage 24, and is stopped from the upstream side to the downstream side. A faucet member 34, a pressure regulating valve 36, and a stop cock guide member 38 are provided.

As shown in FIGS. 2 and 3, the stop cock member 34 extends along the inner circumference of the predetermined section S <b> 1 of the upstream side water passage 30 from the inlet 24 d of the mounting chamber 24 c of the water side water passage 24. A male screw portion 40 is provided to be screwed into the formed female screw portion 24e.
Further, the water faucet member 34 includes a rotation shaft portion 42 extending in the front-rear direction, and a rear end portion 42 a is a column protruding forward from a part of the front surface 40 a of the male screw portion 40 on the upstream side of the rotation shaft portion 42. It is formed integrally with the portion 40b. Furthermore, the inner peripheral surface 40c of the male screw portion 40 is a passage that allows the primary side water passage 30 and the attachment chamber 24c to communicate with each other when the water inlet 24d of the attachment chamber 24c of the water side water passage 24 is open. A waterway is formed.

  On the other hand, the front end portion on the downstream side of the rotation shaft portion 42 is an operation portion 42 b that can be rotated about the central axis C in the longitudinal direction of the water stopcock 3 with respect to the rotation shaft portion 42. A key groove 42c is formed in the operation portion 42b. By inserting a tool (not shown) such as a flathead screwdriver into the key groove 42c and turning, the male screw portion 40 and the rotary shaft portion of the water stop cock member 34 are rotated. The rotation operation about the central axis C about the axis 42 can be performed.

  Further, the water stop cock member 34 includes a water stop valve body portion 44 formed so as to protrude radially outward from the rear end portion 42a of the rotating shaft portion 42. When the rotation operation by the operation portion 42b of the plug member 34 is performed, the plug member 34 moves in the axial direction relative to the inlet 24d of the mounting chamber 24c of the water-side water passage 24 according to the rotation of the rotation shaft portion 42 around the axis. Thus, the inlet 24d can be opened and closed.

  Further, as shown in FIG. 3, the water stop valve body portion 44 of the water stop cock member 34 includes a front side support protrusion 44a and a rear side support formed so as to protrude radially outward at a predetermined interval in the front-rear direction. A protrusion 44b and a packing 46, which is an annular seal member, is attached and held between the front support protrusion 44a and the rear support protrusion 44b. The packing 46 is formed of a rubber material, a resin material, or a composite material thereof. As shown in FIG. 3, the seal surface 46 a of the packing 46 is in contact with the inlet 24 d of the mounting chamber 24 c of the water-side water passage 24. When in close contact, the inlet 24d serves as a valve seat so that the primary-side water passage 30 and the secondary-side water passage 32 of the water-side water passage 24 are stopped. A surface with which the sealing surface of the inflow port 24d contacts is referred to as a contact surface 81.

  On the other hand, as shown in FIG. 4, when the water stop valve body 44 of the water stop valve member 44 and the packing 46 are not in contact with the contact surface 81, the primary side of the water side water passage 24 is provided. The side water passage 30 and the secondary side water passage 32 are in a state where water is passed through, the pressure regulating valve body 48 of the pressure regulating valve 36 is slidable in the axial direction with respect to the outer peripheral surface 46b of the packing 46, and the water side water passage The outer peripheral surface 46b of the packing 46 is connected to the inner peripheral surface 48a of the pressure regulating valve body 48 so that the water flowing into the mounting chamber 24c of the 24 does not enter the spring chamber 52 of the pressure regulating spring 50 inside the pressure regulating valve body 48. It is designed to seal the gap. An arrow W indicates the flow of water.

  Further, as shown in FIG. 5, immediately before the water stoppage, the gap between the packing 46 and the inlet 24d that becomes a flow path toward the mounting chamber 24c of the water-side water passage 24 is very narrow, so that the flow rate of water is increased. As a result, the pressure in the region at the inlet 24d decreases.

  As shown in FIGS. 6 and 7, the packing 46, which is an annular seal member, has a convex portion 80 on the side that comes into contact with and comes into contact with the contact surface 81 in the inflow port 24 d. The seal surface 46 a in the convex portion 80 is gradually inclined downward from one end on the inner peripheral side of the packing 46 to the other end. Therefore, as shown in FIG. 6, the gap between the seal surface 46a and the contact surface 81 is gradually narrowed in the water flow direction. Therefore, in the gap between the seal surface 46a and the contact surface 81, a portion where the seal surface 46a is closest to the contact surface 81 occurs in a part in the water flow direction, and this portion regulates the flow rate of water. Therefore, the narrowed portion 82 is formed.

  As another second embodiment, as shown in FIG. 8, there is one in which the packing 46 is gradually inclined upward from one end to the other end on the inner peripheral side. As another third embodiment, as shown in FIG. 9, there is a shape protruding in the vicinity of the center of the seal surface 46a toward the inlet 24d. The protruding shape of the packing 46 in FIG. 9 is gently inclined from both ends of the seal surface 46a toward the center.

  7 to 9, the pressure of the narrowed portion 82 is greatly reduced immediately before water stoppage, but the pressure is greatly reduced as compared with the conventional packing 46 having the horizontal seal surface 46a. The area can be shortened, and the force applied to the packing 46 can be reduced. Also, in terms of sealing performance, after the tip of the seal surface 46a abuts against the abutment surface 81 and stops water, the packing 46 is further pressed against the seal surface 46a, so that the entire convex portion 80 and the abutment surface 81 at the inlet 24d are They can be brought into contact with each other to form a face seal, and a sufficient sealing property can be obtained.

  Next, in order to confirm the effect of the present invention, a comparative experiment was performed using the packing 46 having a horizontal seal surface 46a as in the prior art and the packing 46 of FIG. 7 which is the first embodiment of the present invention. In the experiment method, the distance between the sealing surface 46a and the inlet 24d was adjusted to 0.4 mm, and the amount of water discharged in the conventional and the present invention was measured until the distance gradually decreased from that point until the distance became 0 mm.

  As a result of the above experiment, the result shown in FIG. 10 was obtained. In the graph of FIG. 10, the vertical axis indicates the water discharge amount [L / min], the horizontal axis indicates the valve opening [mm], the packing 46 inclined outward is indicated by a solid line, and the conventional packing 46 is indicated by a dotted line. From this graph, it can be seen that the conventional packing 46 has a range W in which the amount of water discharged changes abruptly. This is because, as described above, the gap between the seal surface 46a and the contact surface 81 is narrowed, and the packing 46 is drawn and deformed by the negative pressure. On the other hand, in the first embodiment of the present invention, the relationship between the water discharge amount and the valve opening is almost proportional and stable. Therefore, by using the embodiment of the present invention, it is possible to finely adjust the water discharge amount.

  In the faucet device provided with the stop cock according to the embodiment of the present invention described above, as an example, the embodiment applied to the thermostat mixing tap which is a hot water mixing faucet device has been described, but is not limited to such a configuration. For example, for hot water and water mixing faucet devices, in addition to the thermostat mixing tap, the open / close valve that switches between water discharge and water shutoff is a single lever type mixing tap that uses both the hot water side and the water side. The present invention may be applied to a two-handle type mixing stopper provided separately for water and water. Alternatively, it may be applied to a single faucet or the like.

DESCRIPTION OF SYMBOLS 1 Stop cock device 2 Hot water / water mixing faucet device 3 Stop water tap 4 Hot water / water mixing faucet device body 6 Hot water side inflow portion 8 Water side inflow portion 10 Spout 10a Water outlet (water discharge portion)
12 Shower hose (water discharge part)
14 Temperature control device 16 Curran / shower switching device (stopping water switching means)
18 Hot water side leg member (main cock body)
20 Water-side leg member (main valve body)
20a Front side of water-side leg member 20b Back side of water-side leg member 20c Water faucet mounting portion of water-side leg member 20d Female screw of water-side leg faucet mounting portion 22 Hot water-side water passage 24 Water-side water passage 24a Water-side waterway inlet 24b Water-side waterway outlet 24c Water-side waterway mounting chamber 24d Water-side waterway mounting chamber inlet 24e Water-side waterway 26 Internal connection of water-side leg member Part 28 Downstream side connection part of water side leg member 30 Primary side water passage 32 Secondary side water passage 34 Stop valve member 36 Pressure regulating valve 38 Stop valve guide member 40 Male screw part 40a of stop valve member Front surface of male screw portion 40b Column portion of male screw portion of water stopper member 40c Inner peripheral surface of male screw portion of water stopper member 42 Rotating shaft portion of water stopper member 42a Rear end portion of rotating shaft portion of water stopper member 42b Operation part of the rotating shaft part of the water faucet member 42c Water faucet member Key groove of the operation part of the rotating shaft part 44 Water stop valve body part of the water stop valve member 44a Front support protrusion of the water stop valve body part of the water stop plug member 44b Rear side support of the water stop valve body part of the water stop plug member Protrusion 46 Packing (seal member)
46a Sealing surface of packing 46b Outer peripheral surface of packing 48 Pressure regulating valve body 48a Inner circumferential surface of pressure regulating valve body 50 Pressure regulating spring 52 Spring chamber 80 Convex part 81 Contact surface 82 Narrow part

Claims (4)

A stop cock body having an inflow channel and an outflow channel for water;
A stop cock member that is movable back and forth with respect to the stop cock body, and
A water faucet device capable of opening and closing an inlet formed at the downstream end of the inflow channel by moving the water faucet member forward and backward,
A packing made of an elastic body is fixed to a position of the water stop plug member that contacts the periphery of the inlet, and a contact surface that contacts the packing at the inlet is flat. In the water stopcock having a sealing surface that contacts the flat surface of the contact surface,
In the gap between the contact surface and the seal surface when the inflow port is opened, a narrowed portion is formed in a part in the flow direction of water from the inflow channel to the outflow channel. Water stop device characterized by. The contact surface at the inflow port is a flat surface orthogonal to the advancing and retreating direction of the water stop cock member, and a part of the seal surface of the packing is in a shape close to the contact surface. The water faucet device according to claim 1, wherein a constriction is formed. The water faucet device according to claim 2, wherein at least a part of the seal surface of the packing has an inclined shape gradually approaching toward the contact surface.   The seal surface of the packing has a shape inclined downward or upward from one end side to the other end side in the flow direction of water from the inflow channel to the outflow channel. The stop cock device according to the description.