JPH0211670Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement in a gasket used for preventing water leakage from a tap part of a water faucet or the like.

[Conventional technology]

2. Description of the Related Art Generally, a gasket for preventing water leakage is press-fitted into the socket of a valve that controls water supply, such as a water faucet. FIG. 3 shows a water faucet part, in which 4 is a faucet main body, 6 is a cylinder part 5 which is screwed onto the upper end opening of a cylinder part 5 formed to protrude upward from the faucet main body 4, and has a shaft hole 7. A funnel-shaped cover 8 is rotatably loosely inserted into the cylinder portion 5 from the shaft hole 7, and is rotated by a handle 9 pivotally attached to the end projecting upward of the shaft hole 7, thereby opening the faucet body. A shaft 10 for opening and closing a valve (not shown) inserted in 4 is made of a single piece of rubber-like elastic material, as shown in an enlarged view in FIG. It is an annular packing formed with a tapered surface 10a that corresponds to the tapered surface 6', and is located within the inner peripheral space of the cover 6, and the outer diameter portion 10b is in contact with the inner tapered surface 6' of the cover 6 and the cylinder portion 5. It is held between the upper end surface 5' and slides on the outer circumferential surface of the shaft 8 at the inner diameter lip portion 10c, so that the water flowing inside the faucet body 4 flows through the gap between the shaft hole 7 of the cover 6 and the shaft 8. 1
1 and the threaded part 12 between the cover 6 and the cylinder part 5
Prevents leakage from.

[Problem that the invention attempts to solve]

However, since the conventional gasket 10 described above is made of a single rubber-like elastic material, when the cover 6 is rotated using a wrench (not shown) and screwed onto the cylinder portion 5 when it is installed, it remains stationary. The cylinder part 5 is the side and the cover 6 is the rotating side.
The gasket 10 deforms as if being twisted between the two, and is fitted into the inner peripheral space of the cover 3 in this deformed state. Also, due to the fastening force between the cylinder portion 5 and the cover 6, the tapered surface 10 of the packing 10 is pressed against the inner tapered surface 6' of the cover 6.
a does not slide as if escaping in the inner diameter direction, and since there is variation in the tightening torque of the wrench against the cover 6, if the tightening force is large, the deformation of the seal 10 in the inner diameter direction will be excessive. That is, the excessive surface pressure in the inner radial direction of the gasket 10 obstructs the rotation of the shaft 8 (handle 9), thereby interfering with the opening and closing operations of the faucet.

In view of the above problems, the present invention aims to suppress the deformation of the packing during installation and the excessive tightening load of the packing on the shaft.

[Means for solving problems]

As a means to achieve this object, the present invention provides a shaft that is press-fitted between a shaft that operates a valve that opens and closes a water supply waterway, etc., and a cover formed by rotatably loosely inserting the shaft. In a packing that prevents water from leaking between the shaft and the threaded part of the cover, a tapered surface is formed on one side in the axial direction of the packing body made of a rubber-like elastic material and is in pressure contact with the inner tapered surface of the cover. A reinforcing ring made of a material with low elastic deformation and low friction, such as fluorinated ethylene resin, is baked.

[Effect]

According to the above configuration, the stiffness of the reinforcing ring integrally baked into the packing body is relatively high (the amount of elastic deformation is small), so that when the cover is tightened during assembly, the reinforcing ring is attached to the packing body in the inner diameter direction. In addition, since the reinforcing ring has low friction, torsional deformation of the packing body due to rotation caused by screwing the cover during assembly is also suppressed.

〔Example〕

Next, an embodiment of the packing according to the present invention will be described based on the drawings.

That is, the packing 1 of this embodiment shown in FIG.
An annular main body 2 made of a rubber-like elastic material having a tapered surface 2a corresponding to an inner tapered surface 6' of a faucet cover 6 to be described later on one side in the axial direction, and a lip portion 2c formed on the inner diameter portion; It is comprised of a reinforcing ring 3 made of ethylene fluoride resin, which is integrally baked and molded on the tapered surface 2a of the main body 2 and has a tapered surface 3' in the same direction as the tapered surface 2a.

FIG. 2 shows the state in which the gasket 1 having the above structure is attached to the tap part of a water faucet, where 5 is a cylinder part (not shown) projecting upward from the faucet main body, and 6 is an opening at the upper end of the cylinder 5. a substantially funnel-shaped cover having a shaft hole 7 and screwed onto the part;
A shaft is loosely inserted into the cylinder portion 5 through the shaft hole 7 and opens and closes a valve (not shown) in the faucet main body by rotation. Patsukin 1
When installing, the cover 6 is first placed on the upper end surface 5' of the cylinder part 5 with the reinforcing ring 3 facing upward (cover 6 side) while being externally inserted onto the shaft 8. 5 using a wrench or the like (not shown), the gasket is fitted into the inner circumferential space of the cover 6, and is pressed against the inner tapered surface 6' of the cover 6 by tightening the cover 6. Since the reinforcing ring 3 of No. 1 is made of fluorinated ethylene resin with extremely small amount of elastic deformation, it has the effect of suppressing the deformation of the main body 2 made of rubber-like elastic material in the inner radial direction. It has abrasive properties, and its tapered surface 3' slides well against the inner tapered surface 6' of the cover 6 rotated by the wrench, so it has the effect of suppressing torsional deformation in the outer diameter portion 2b of the main body 2. have.

[Effect of idea]

As described above, the seal of the present invention has high rigidity at the pressure contact part with the inner tapered surface of the faucet cover.
In addition, since the reinforcing ring made of a material with low friction is integrally baked, deformation of the packing in the inner radial direction and torsional direction due to the screwing of the cover is suppressed when the reinforcing ring is attached. Even when the tightening force of the cover is relatively large, the tightening load of the gasket on the shaft that opens and closes the valve does not become excessive, so that the faucet can be opened and closed smoothly. It has excellent effects.

[Brief explanation of the drawing]

Fig. 1 is a half-cut sectional view showing an embodiment of the packing according to the present invention, Fig. 2 is a half-cut sectional view of the main part of the tap part of a water faucet showing the same installed state, and Fig. 3 is a half-cut sectional view of the packing according to the conventional example. FIG. 4 is a partially cutaway side view of the water faucet showing the installed state, and FIG. 4 is a half-cut sectional view of the same gasket. 1...Packskin, 2...Main body, 2a, 3'...
Tapered surface, 2b... outer diameter part, 2c... lip part,
3... Reinforcement ring, 5... Cylinder section, 6... Cover, 6'... Inner tapered surface, 8... Shaft.

Claims (1)

[Scope of utility model registration request] A press fit between a shaft that operates a valve that opens and closes a water supply channel such as a water faucet, and a cover into which the shaft is rotatably loosely inserted, and between the cover and the shaft and the threaded portion of the cover. In a packing that prevents water from leaking from a rubber-like elastic material, the tapered surface formed on one side in the axial direction of the packing body made of a rubber-like elastic material and in pressure contact with the inner tapered surface of the cover is coated with elastic deformation rate and friction such as ethylene fluoride resin. This patchkin is characterized by having a reinforcing ring made of small material baked into it.