JPH06174155A - Faucet joint - Google Patents

Abstract

(57) [Summary] [Purpose] It is intended to make it easy to attach a faucet joint to a faucet with a damaged outer circumference or an irregular shape, and to obtain a reliable sealing effect. [Structure] A cylinder, a cylindrical push-up piston provided with a pressure receiving portion at its lower portion so that its outer circumference is slidable on the cylinder inner wall, a push-up packing that is pushed up by the push-up piston and seals the bottom of the faucet, and the cylinder described above. The pressure receiving area of the water pressure from the faucet on the downstream side with respect to the cylinder is made larger than the pressure receiving area on the upstream side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a faucet joint for connecting a water faucet and a hose.

[0002]

2. Description of the Related Art Conventionally, as a faucet joint, there has been a side seal type in which packing is provided on a side surface of the faucet to prevent water leakage. This is because the outer surface of the faucet and the side packing are brought into close contact with each other for sealing, so that the outer surface of the faucet is scratched, and it is difficult to seal the water with a modified faucet. In view of this, a bottom seal type technology in which a push-up packing seals the bottom of the faucet is disclosed in Japanese Utility Model Publication No. 57-71879. This is a structure in which the packing is brought into close contact with the bottom surface of the faucet for sealing, but the packing holding piece in the lower part of the joint body is deformed and screwed to push up the packing.

[0003]

However, this type requires the work of rotating the joint body after fixing the faucet joint to the faucet. This rotating work requires a lot of force, and it is difficult for certain people, such as women and old people, to be reliably sealed. Therefore, the sealing ability at the time of mounting varies, and it is difficult to universally obtain a predetermined ability. Therefore, an object of the present invention is to make it easy to attach a faucet joint to a faucet having a damaged outer periphery or a deformed faucet, and to obtain a reliable sealing effect.

[0004]

A first aspect of the present invention is directed to a cylinder, a cylindrical push-up piston having a pressure-receiving portion at its lower portion, the outer periphery of which is slidable on the cylinder inner wall, and a push-up piston to push up the tap. It is composed of a push-up packing that seals the bottom surface and a head ring located above the cylinder, and the downstream pressure receiving area of the hydraulic pressure from the faucet with respect to the cylinder is made larger than the upstream pressure receiving area. The second invention is characterized in that a spring for pushing up the piston is provided in the cylinder. A third invention is characterized in that a faucet guide is provided inside the head ring. A fourth invention is characterized in that the faucet guide also serves as a side packing of the faucet.

[0005]

According to the first aspect of the invention, the faucet is located at the central portion of the faucet joint and is pressed against the lifting packing inside the joint. The faucet joint is fixed to the faucet via the head ring. Simultaneously with the water flow through the faucet, the cylinder below the joint body is also filled with water, and water pressure acts on each part. Water pressure acts on the push-up piston from each direction. The surface that receives pressure from the bottom is larger than the surface that receives pressure from the top, so the force of the magnitude of water pressure multiplied by the difference in the pressure receiving area causes the push-up piston to obtain the force to move upward. . Therefore, this faucet joint is always pressed against the faucet by the pressing force of water pressure. Since this pressing force increases as the water pressure increases, stable sealing performance can be obtained from low water pressure to high water pressure.

According to the second aspect of the invention, since the spring for pushing up the push-up piston is incorporated, the push-up piston can be pushed against the faucet by the spring force even if water pressure is not generated in the cylinder. According to the third aspect of the present invention, the faucet guide in the head ring enables easy and reliable positioning of the bottom face of the faucet and the push-up packing in the axial direction. According to the fourth aspect of the invention, the side packing that also serves as the faucet guide can seal the side surface of the faucet.

[0007]

The first embodiment shown in FIG. 1 comprises a head ring 1 provided with a faucet stop screw 6, a push-up packing 3 inside a cylinder 2 and a push-up piston 4, and a pressure receiving portion is provided below the push-up piston 4. There is a part 5. The space between the cylinder 2 and the piston 4 is sealed with a packing 7. The diameter D _{2 of the} cross section of the faucet water flow <the outer circumference D _{1 of the} pressure receiving portion
Is. First, the packing 3 is pressed against the bottom surface of the faucet, and the screw 6 is tightened to fix the joint. When the water flows, the water pressure P acts on each part in the cylinder 2. The pressure P is
It acts in the direction of →. Focusing on the force in the vertical direction, the push-up piston 4 is
It is pushed upward with a force of {π × (D ₁ ² −D ₂ ² ) / 4} × P. Since this pressing force increases as the water pressure P increases, stable sealing performance can be obtained regardless of the change in water pressure.

The second embodiment shown in FIG. 2 is the same as the first embodiment except that a spring 8 for pushing up the piston 4 is provided inside the cylinder 2. The method of installing this joint to the faucet is the same as that of the first embodiment, but if the push-up packing 3 is not pressed firmly against the bottom of the faucet and is fixed by the screw 6, the spring 8 The force causes the push-up piston 4 to be pushed up.
In the joint of the third embodiment shown in FIG. 3, a side packing 9 also serving as a faucet guide is provided inside the head ring 1. When the faucet is pushed along the side packing 9 and the joint body is fixed to the faucet and water is caused to flow, the water pressure P acts on each part in the cylinder 2. At this time, since the faucet bottom surface and the push-up packing 3 are in close contact with each other from the beginning, the first
Similar to the embodiment, the piston 4 has a value of {π × (D ₁ ² −D ₂ ² ).
/ 4} × P force pushes upward. Since this pressing force increases as the water pressure P increases, stable sealing performance can be obtained regardless of changes in water pressure.

If, like the fourth embodiment shown in FIG.
When the joint bottom is fixed to the faucet and the bottom face of the faucet and the packing 3 are separated from each other, the water pressure P also acts on the outside of the side packing 9 when water is caused to flow. Then, the side packing 9 is pressed against the side surface of the faucet by water pressure, and is initially sealed by the side packing 9. Even in this case, focusing on the force in the vertical direction, the piston 4 is {π × (D ₁ ² −
D ₃ ²⁾ / 4} × upwardly pushed with a force of P. Then, the push-up piston 4 moves upward until the push-up packing 3 reaches the bottom surface of the faucet. Then, after the close contact, as in the other embodiments, the pressing force is increased by the increase in the water pressure P, so that regardless of the change in the water pressure,
Stable sealing performance can be obtained. In this example,
The case where the inner diameter D _{2 of the} faucet> the hole diameter D ₄ of the push-up packing 3 has been described, but in the case of D ₂ ≦ D ₄ , the push-up piston 4 receives the downward force in the first to third embodiments. However, other actions and effects remain the same.

[0010]

[Effects] The faucet joint of the present invention can be easily attached to a faucet having an outer periphery with a damaged outer shape, and a reliable sealing effect can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a sectional view of a second embodiment.

FIG. 3 is a sectional view of a third embodiment.

FIG. 4 is a sectional view of a fourth embodiment.

[Explanation of symbols]

 1 Head ring 2 Cylinder 3 Push up packing 4 Push up piston 5 Pressure receiving part 8 Spring 9 Faucet guide, Side packing

Claims (4)

[Claims] Claim: What is claimed is: 1. A cylinder, a cylindrical push-up piston having a pressure-receiving portion at its lower portion, the outer periphery of which is slidable on the inner wall of the cylinder, a push-up packing which is pushed up by the push-up piston and seals the bottom of the faucet, and the cylinder. And a head ring located above the head ring, wherein the downstream pressure receiving area of the hydraulic pressure from the faucet with respect to the cylinder is larger than the upstream pressure receiving area. 2. The faucet joint according to claim 1, wherein a spring for pushing up the push-up piston is provided inside the cylinder. 3. The faucet joint according to claim 1, wherein a faucet guide is provided inside the head ring. 4. The faucet joint according to claim 3, wherein the faucet guide also serves as a side packing of the faucet.