JPH08285106A - Self-closing faucet - Google Patents

Abstract

PURPOSE: To reduce an operation resistance at its push-in operation time and obtain a favorable operability, in a self-closing faucet for stopping water discharge automatically, after pushing in a push in operation part and discharging water for a certain time continuously. CONSTITUTION: A casing 20 is arranged inside a faucet main body 10 and a piston type valve disk 34 is inserted slidably in the casing 20. The valve disk 34 is moved in a direction parting from a valve seat part 32 by the push-in operation of a push-in operation part 12 and a water route is released and water is discharged. At this time, the discharge passage of water heading for the outside of the casing 20 from a water room 56 is expanded by the elastic deformation of a clearance adjust member 62 consisting of an elastic material installed on the way of a communication passage 58 in a casing bottom part 54 and a moving resistance for the valve disk 34 is reduced. While, at the faucet auto-shut time, the clearance adjust member 62 is restored to the original form and the width of the water passage heading for the water room 56 from the outside of the casing 20 is reduced and a certain resistance is given to the restoration operation of the valve disk 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-closing faucet, and more particularly to a technical means for improving operability.

[0002]

2. Description of the Related Art Water is started when the operation part is pushed in,
A self-closing faucet that automatically stops spouting after a certain time is widely used. As a self-closing mechanism of this self-closing faucet, the following mechanism has been conventionally adopted. FIG. 4 shows the main part thereof.

In the figure, reference numeral 100 denotes a tubular casing disposed inside the body of the faucet, and an inlet and an outlet (not shown) penetrating the inside and outside of the tubular wall at positions separated by a predetermined distance in the longitudinal direction. A valve seat (not shown) is provided at a position between the inflow port and the outflow port so as to project toward the inner surface of the casing.

Reference numeral 102 denotes a piston-type valve body which is fitted in a watertight and slidable manner on the inner surface of the casing 100. A U-packing 104 for sealing is provided on the outer peripheral portion, and a front end portion (right end portion in the figure) is provided. The valve seat 106 made of an elastic material is provided.

In this self-closing faucet, when the valve body 102 is separated from the valve seat portion, the water passage from the inflow port to the outflow port is opened and water is spouted from the spout, and the valve seat 106 is also closed. The water passage is blocked by the contact with the valve seat portion, and the water discharge is stopped.

Here, the valve body 102 is fixed to the working rod 108, and when the working rod 108 is pushed leftward in the drawing, the valve body 102 is leftward in the drawing, that is, separated from the valve seat portion. When the operating force is removed, the valve body 102 is moved rightward, that is, in the direction in which it abuts on the valve seat portion, by a spring (not shown) that biases the working rod 108 to the right.

A cleaning pin 110 is connected to the valve body 102, and the cleaning pin 110 is connected to the valve body 1.
It is designed to move together with 02. The cleaning pin 110 is inserted through a communication passage 114 formed of a through hole formed in a bottom portion 112 of the casing 100. The communication passage 114 and, strictly speaking, a narrow space between the communication passage 114 and the cleaning pin 110. Water flows from the outside of the casing 100 toward the water chamber 116 inside the casing 100 through the gap.

Thus, the valve body 102 is returned rightward in the figure by the urging force of the spring while the water flows from the outside of the casing 100 into the water chamber 116 through the communication passage 114. At that time, the movement of the valve body 102 in the returning direction is suppressed based on the flow resistance of the entire communication passage 114. Therefore, after the valve body 102 is separated from the valve seat portion, the valve body 102 slowly moves toward the valve seat portion side over a certain period of time. Will be returned. Then, spouting water from the spouting port is continued for a certain period of time until the valve body 102 returns to the valve seat portion.

[0009]

In the case of this self-closing faucet,
When the action rod 108 is operated in the pushing direction, as shown in FIG.
As shown in (b), the water in the water chamber 116 is filled with the U packing 1
04 is elastically deformed and is released to the right in the figure, while the valve body 1
02 moves leftward in the figure.

Therefore, the conventional self-closing faucet has a problem that the operation resistance at the start of water discharge is large, a large operation force is required, and the operability is insufficient.

[0011]

The self-closing faucet of the invention of the present application has been devised to solve such a problem. Thus, the self-closing faucet of the invention of the present application comprises: (a) a faucet body, (b) a cylindrical casing disposed inside the faucet body, and (c) an inner surface side of the casing. (4) a valve seat portion provided in a shape of a circle, (d) an inlet and an outlet that are arranged and formed at a predetermined distance in the casing to communicate the inside and the outside of the casing, and (e) are watertight to the inner surface of the casing. A piston-type valve body that is slidably fitted and that blocks a water channel from the inflow port to the outflow port by abutting on the valve seat portion; and (f) the casing from one end side in the longitudinal direction of the casing. An action rod that is inserted into the inside and fixed to the valve element, and applies an applied operating force to the valve element to move the valve element in a direction away from the valve seat portion; and (g) the action rod. The operation part, which is provided at the tip of the A spring for urging the valve body in a direction to bring it into contact with the valve seat portion; (i) a water chamber formed inside the casing and between the bottom portion of the casing and the valve body; A valve that has a communication passage that connects the water chamber and the outside of the casing and allows the water outside the casing to flow into the water chamber, and is separated from the valve seat portion based on the flow resistance of water in the communication passage. In a self-closing faucet that moves a body to a position where it abuts against the valve seat portion, a through hole is formed in a central portion, and at least a peripheral portion of the hole is formed of an elastic material, A clearance adjusting member for changing the size of the hole by elastic deformation in the centerline direction of the hole of the peripheral portion is fixedly provided at an intermediate position of the communication path, and on the clearance adjusting member in the communication path, The inner diameter of the downstream portion is made larger than that of the hole, and the communication is performed at the hole. Characterized in that allowed forming a throttle portion of (claim 1).

According to another invention of the present application, in claim 1, the communication passage is formed in a bottom portion of the casing in a moving direction of the valve body, and a cleaning pin is integrally moved with the valve body in the valve body. In this state, the cleaning pin is connected in such a state that the cleaning pin is inserted through the communication passage (claim 2).

Yet another invention of the present application is that in the first or second aspect, the gap adjusting member is a disk-shaped member made entirely of an elastic material (claim 3).

According to still another invention of the present application, in claim 1, 2 or 3, there is provided at the bottom portion of the casing a regulating means for regulating elastic deformation of the hole portion of the gap adjusting member in a direction toward the water chamber. It is provided (Claim 4).

[0015]

As described above, according to the first aspect of the present invention, the gap adjusting member is fixedly provided at an intermediate position of the communication passage that connects the water chamber inside the casing and the outside of the casing, and the inner diameter of the communication passage is reduced. The gap adjusting member is formed to be larger than the hole portion, and the throttle portion of the communication passage is formed in the hole portion. According to the present invention, the operation portion is operated to form the piston type valve body. When pushed into the water chamber, the pressure generated in the water chamber causes the peripheral portion of the hole of the gap adjusting member to elastically deform toward the outside of the casing to expand the hole diameter and move the water in the water chamber to the outside of the casing through the hole. It acts to escape. As a result, the pushing resistance against the piston type valve body is reduced, and the operating portion can be operated lightly.

On the other hand, when the operating force is released and the valve body is returned by the biasing force of the spring, the peripheral portion of the hole of the gap adjusting member is restored to its original shape by releasing the pressure applied in the water chamber, and The width (hole diameter) of the expanded water channel is narrowed again.

This causes a great flow resistance when the water outside the casing flows into the water chamber, whereby the valve body is slowly returned over a long period of time, and the water discharge from the water discharge port is accurately continued for a certain period of time. It

According to a second aspect of the present invention, the communication passage is formed at the bottom of the casing, and the cleaning pin is connected to the valve body side in a state of integrally moving with the valve body and inserted into the communication passage. According to the present invention, the cleaning pin moves relative to the inside of the hole in the gap adjusting member each time the valve body moves, so that the water channel width is increased based on the adhesion of foreign matter to the inner surface of the hole. It is possible to satisfactorily prevent narrowing or blockage.

According to a third aspect of the present invention, the entire gap adjusting member is formed of an elastic material and has a disc shape. According to the present invention, the gap adjusting member can be inexpensive and simple. This makes it easy to install in the communication passage.

According to a fourth aspect of the present invention, there is provided a regulating means for regulating elastic deformation of the hole portion (circumferential portion) of the gap adjusting member in the direction toward the water chamber. According to the present invention, the operating portion is provided. It is possible to reliably prevent the peripheral portion of the hole in the gap adjusting member from being reverse elastically deformed toward the water chamber to expand the hole when the operating force is removed. It can be kept small. That is, it is possible to reliably continue the water discharge from the water discharge port only for a predetermined time set in advance.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a water faucet body having a tubular shape as a whole, one end side of which has an opening shape, and a pushing operation portion 12 which also serves as a cap is provided there. A water outlet 14 is provided.

A water passage 16 is formed inside the faucet body 10, and a check valve 18 for preventing backflow is provided at the base end portion thereof. Inside the faucet body 10, a cylindrical casing 20 is arranged. The casing 20 is screwed to the female screw portion of the water faucet body 10 at the male screw portion 22.

The casing 20 has an inflow port 24 penetrating inside and outside the cylinder wall at a position separated by a predetermined distance in the longitudinal direction.
And an outlet 26 are provided so that the water in the water passage 16 inside the faucet body 10 flows into the casing 20 through the inlet 24 and flows out of the casing 20 through the outlet 26. There is. The water discharged from the outflow port 26 reaches the water discharge port 14 through the annular passage 28 between the pair of annular large diameter portions provided on the outer peripheral surface side of the casing 20, and is discharged to the outside from here.

The water passage 16 and the annular passage 28, and the annular passage 28 and the opening of the faucet body 10 are isolated from each other by an O-ring 30 attached to the large diameter portion of the casing 20.

The casing 20 is provided with a valve seat portion 32 having a shape projecting toward the inner surface at a position between the inflow port 24 and the outflow port 26, and the valve seat portion 32 is located on the left side in the figure. At the position, the piston-type valve element 34 is fitted in a watertight and slidable manner on the inner surface of the casing 20.

The valve body 34 holds the U-packing 38 in an annular groove on the outer peripheral surface of the holding member 36 so that the U-packing 38 is slidably contacted with the inner surface of the casing 20, and is elastic at the front end (the right end in the figure). A valve seat 41 made of a material is provided, and by abutting or separating the valve seat 41 from the valve seat portion 32,
A water channel from the inflow port 24 to the outflow port 26 is opened and closed.

A working rod 40 is inserted into the casing 20 from the opening end on the right side in the figure. The insertion side end of the action rod 40 is fixed to the valve body 34, and the opposite end is fitted to the pushing operation portion 12 and is prevented from coming off by a set screw 42.

That is, the right end portion of the working rod 40 is fixed to the push-in operating portion 12, and the operating force applied to the push-in operating portion 12 is applied to the valve element 34 via the working rod 40, so that the valve The body 34 can be moved leftward in the figure.

The working rod 40 is slidably fitted to the fitting surface 46 of the casing 20 at the large diameter portion 44. The fitting portion between the large-diameter portion 44 and the fitting surface 46 is water-tightly sealed by an O-ring 48 mounted in an annular groove on the outer peripheral surface of the large-diameter portion 44.

The working rod 40 is urged by the spring 50 in the right direction in the figure, that is, in the direction of pushing out the pushing operation portion 12. Here, one end of the spring 50 is brought into contact with the lower surface of the large-diameter portion 44 of the working rod 40, and the other end thereof is brought into contact with the receiving portion 52 provided so as to project on the inner surface of the casing 20.

A semi-sealed water chamber 56 is formed between the valve body 34 and the bottom portion 54 of the casing 20. Further, a communication passage 58 is formed in the bottom portion 54 of the bottom portion 54 so as to penetrate the bottom portion 54 in the moving direction of the valve body 34, that is, in the longitudinal direction of the casing 20, and water outside the casing 20 enters the water chamber 56 through the communication passage 58. It can be made to flow in.

On the other hand, the valve body 34 has a cleaning pin 60.
Is connected to the valve body 34 in a state of integrally moving, and the cleaning pin 60 is inserted through the communication passage 58.

The communication passage 58 is formed such that the inner diameter thereof is larger than the outer diameter of the cleaning pin 60 by a predetermined dimension, and a disc-shaped gap adjusting member 62 made of an elastic material is formed in the communication passage 58 of the communication passage 58. It is fixed so as to project toward the center.

The clearance adjusting member 62 has a slightly larger inner diameter than the cleaning pin 60 at the center (in the free state).
It has a hole 64, and the communication passage 5 is formed in the hole 64.
8 constitutes a diaphragm portion. Here, as shown in FIG. 2B, the inner surface of the hole 64 is a tapered surface whose inner diameter gradually decreases in the direction from the water chamber 56 to the outside of the casing 20.

The gap adjusting member 62 is used for the casing 2
No. 54 by screwing the plug 72 having the male screw portion 70 into the female screw hole portion 68 provided in the bottom portion 54 of No. 0.
It is fixed to.

Next, the operation of the self-closing faucet of this example will be described. In the self-closing water faucet of this example, when the pushing operation portion 12 is pushed, the valve element 34 is moved leftward in FIG. 1 via the action rod 40 to separate from the valve seat portion 32 and flow from the inflow port 24. Open the waterway to the outlet 26. As a result, the water in the water passage 16 in the faucet body 10 flows into the casing 20 from the inflow port 24, flows out from the outflow port 26, reaches the water discharge port 14, and is discharged to the outside.

On the other hand, when the operating force applied to the pushing operation section 12 is removed, the valve element 34 is returned to the right in the figure based on the urging force of the spring 50, and the valve element 34 contacts the valve seat section 32. At that time, the water channel from the inflow port 24 to the outflow port 26 is blocked, and the water discharge is stopped.

Thus, in the case of the self-closing water faucet of this example, the valve body 34 moves leftward in the figure while discharging the water in the water chamber 56 at the start of water discharge. In the stopper, the circumference of the hole 64 in the gap adjusting member 62 is the water chamber 5
As shown in FIG. 2A, the pressure applied to 6 elastically deforms in the direction from the water chamber 56 to the outside of the casing 20 to expand the diameter of the hole 64.

As a result, the water in the water chamber 56 can easily escape to the outside of the casing 20 through the communication passage 58,
It does not cause great resistance to the movement of the valve element 34. Therefore, in this example, the push-in operation unit 12 can be pushed in lightly.

On the other hand, the pressure applied to the water chamber 56 is released when the operating force applied to the pushing operation unit 12 is removed, so that the gap adjusting member 62 is shown in FIG. 2 (B). The original shape is restored, and the diameter of the hole 64 is reduced.

As a result, from the outside of the casing 20, the water chamber 56
A large inflow resistance occurs when water flows into the inside, whereby the return movement of the valve element 34 is suppressed well, and the water outlet 14
The water is spouted for exactly the set time.

In the present embodiment, the cleaning pin 60 causes the communication passage 58, especially the gap adjusting member 62, to be used every time the faucet is used.
In order to perform the cleaning operation of the passage of the hole 64 part of
There is an advantage that the water discharge operation and the self-closing operation are satisfactorily performed without the hole portion 64 being narrowed or blocked by adhesion of foreign matter to the hole portion 64.

Further, in this example, since the entire gap adjusting member 62 is made of a disk-shaped member made of an elastic material, the gap adjusting member 62 can be constructed with a simple structure and at a low cost, and can be attached to the casing bottom portion 54. Also has the advantage of being easy.

In this example, the downstream side portion of the gap adjusting member 62 in the casing bottom portion 54, that is, the water chamber 56 side portion is made to project to the center side of the communication passage 58 more than the upstream side portion to form the regulating portion 74. Is forming. The restricting portion 74 functions to restrict elastic deformation of the clearance adjusting member 62 in the direction toward the water chamber 56. By doing so, the clearance adjusting member 62 is easily moved in the direction toward the outside of the casing 20. While it can be elastically deformed in the opposite direction, elastic deformation in the opposite direction is suppressed, and the inner diameter of the hole portion 64 when the faucet is closed is favorably maintained at the set diameter.

Next, FIG. 3 shows another embodiment of the present invention. In this example, in the portion of the gap adjusting member 62 on the water chamber 56 side,
A coil spring 75 having a cylindrical shape and a taper shape is arranged, and one end of the coil spring 75 is brought into contact with the gap adjusting member 62, thereby restricting elastic deformation of the gap adjusting member 62 toward the water chamber 56 when the faucet is closed. It was made to do.

Also in this example, the inner diameter of the throttle when the faucet is closed, that is, the inner diameter of the hole 64 in the gap adjusting member 62 can be maintained at the set proper inner diameter, and the water discharge from the water outlet 14 is set. It can be continued for hours.

The embodiment of the present invention has been described in detail above, but this is merely an example, and the present invention can be configured in a form in which various modifications are made without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the inside of a self-closing faucet according to an embodiment of the present invention and an enlarged view of a main part thereof.

FIG. 2 is an operation explanatory view of a main part of the self-closing water faucet in FIG.

FIG. 3 is a view showing the main part of another embodiment of the present invention together with its action.

FIG. 4 is a view showing a main part of a conventional self-closing faucet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Faucet main body 12 Operation part 20 Casing 24 Inflow port 26 Outflow port 32 Valve seat part 34 Valve body 40 Working rod 50 Spring 56 Water chamber 58 Communication passage 60 Cleaning pin 62 Gap adjusting member 64 Hole part

Claims (4)

[Claims] (1) A faucet body, (b) a cylindrical casing disposed inside the faucet body, and (c) a valve seat portion provided in a protruding shape on the inner surface side of the casing. D) An inlet and an outlet which are arranged and formed at a predetermined distance in the casing to communicate the inside and the outside of the casing, and (e) are fitted in a watertight and slidable manner on the inner surface of the casing, and the valve seat is provided. A piston-type valve element that shuts off a water passage from the inflow port to the outflow port by abutting against a portion, and (f) is inserted into the casing from one end side in the longitudinal direction of the casing and is fixed to the valve body, and An operating rod that applies the applied operating force to the valve element to move the valve element in a direction away from the valve seat portion; and (g) a pushing operating force provided at the tip of the operating rod should be applied. Operation part and (h) Contact the valve body with the valve seat part. A spring for urging the casing in the direction of (i) a water chamber formed inside the casing and between the bottom of the casing and the valve body, and (n) communicating the water chamber with the outside of the casing, A valve body having a communication passage for allowing water outside the casing to flow into the water chamber, and a valve element separated from the valve seat portion based on the flow resistance of water in the communication passage to the valve seat portion over a predetermined time. The self-closing faucet that moves to the contact position has a through hole in the center, at least the peripheral portion of the hole is formed of an elastic material, and the elastic deformation of the peripheral portion in the center line direction of the hole A clearance adjusting member for changing the size of the hole is fixedly provided at an intermediate position of the communication passage, and the inner diameters of the upper and downstream portions of the clearance adjusting member in the communication passage are set to be larger than the hole. However, the throttle portion in the communication passage is formed in the hole portion. Self 閉水 plug according to claim. 2. The communication passage according to claim 1, wherein the communication passage is formed in a bottom portion of the casing and in a moving direction of the valve body, and a cleaning pin is connected to the valve body so as to move integrally with the valve body. The self-closing water faucet is characterized in that the cleaning pin is inserted into the communication passage. 3. The self-closing faucet according to claim 1 or 2, wherein the gap adjusting member is a disk-shaped member made entirely of an elastic material. 4. The regulating means for regulating elastic deformation of the hole in the gap adjusting member in the direction toward the water chamber according to claim 1, 2, or 3. A characteristic self-closing faucet.