JPH08277943A - Valve body for cock - Google Patents

Abstract

PURPOSE: To improve productivity and sealing property for a resin made valve body. CONSTITUTION: A valve body 22 is integratedly formed of an installing shaft part 16, a flange 24 pushed by a spindle 2, and a sealing surface part having thin wall thickness, and a recessed part 25 having a diameter smaller than that of a valve hole 3 is formed having deepness which extends in a shaft part 16 on the center of the bottom surface of the sealing surface part 23. When the spindle 2 falls down, the sealing surface part 23 is pushed by a valve seat 3a elastically, the recessed part 25 is deformed in a direction which is enlarged a diameter, and also the valve hole 3 is sealed while slightly loosening the sealing surface part 23 as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve body for a water faucet having a valve opening / closing mechanism for connecting and disconnecting a flow path, and more particularly to a valve body having improved workability by molding with a resin.

[0002]

2. Description of the Related Art A conventional valve structure of a water faucet is schematically shown in FIG. The spindle 2 can be moved back and forth with respect to the valve seat 3a by rotating the valve opening / closing mechanism 1. The valve body 4 is basically composed of a mounting shaft portion 5 which is inserted and held in the spindle 2 and a flange-shaped closing surface portion 6 which is provided orthogonal to the mounting shaft portion 5. A threaded protrusion 7 is provided on the closing surface portion 6, and a rubber-based packing 8 having appropriate elasticity and suitable for sealing the valve seat 3a is fitted therein, and the packing 8 is held by a nut 9. It is like this. When the valve opening / closing mechanism 1 is operated, the end surface 10 of the spindle 2 presses the closing surface portion 6, the packing 8 is pressed against the valve seat 3a, the valve hole 3 is closed, and the flow path is closed.

Such a valve body is mainly made by cutting a metal material which is not easily rusted due to problems of durability and rigidity. Although the cutting work and the nut fixing of the packing are troublesome, the price of the product itself is low. Since it is cheap, a large-scale automated machine cannot be used, resulting in poor productivity. In order to solve this, a bulge portion is provided at the tip of the protrusion so that the packing is press-fitted.
No. 6-10551, JP-A-5-149452), those in which packing is fitted in or out of the closing surface portion (Japanese Utility Model Publication No. 59-15787, JP-A No. 2-6865), and the valve body is made elastic. There have been various proposals of a resin having a structure in which the packing itself is abolished (Japanese Utility Model Laid-Open No. 57-25254).

However, although the above-mentioned object has achieved the purpose of improving the productivity of the valve body to some extent, there is room for further improvement in actual production and use in a faucet. . That is, if the bulging part is made large to secure the holding force of the packing, it is difficult to press-fit the packing and the assembly property is rather deteriorated. Therefore, a separate mold is required, which is a factor of cost increase. Also, in the case where the valve body is made of a resin having elasticity and the packing is abolished, it is necessary to use a resin having a certain low hardness in consideration of the sealing property of the closing surface portion to the valve seat. There is a problem that the overall rigidity of the closed surface portion is unnecessarily reduced.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a valve body for a faucet which is excellent in productivity and sealability by further devising the shape of the resin valve body.

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention, there is provided a mounting shaft portion which is inserted into and held by a spindle which can advance and retreat with respect to a valve seat, and a flange-shaped closing surface portion which is provided at an end of the mounting shaft portion. In a valve body for a faucet in which a protrusion provided on the valve seat side of this closing surface is integrally molded with resin, and a packing for pressing against the valve seat is fitted on the protrusion, the protrusion is fitted into the valve body. A hole is formed, and the packing is retained in a state in which the packing is fitted to the protrusion by a stop plug press-fitted into the fitting hole.

Further, according to the present invention, a mounting shaft portion inserted into and held by a spindle which can be moved forward and backward with respect to a valve seat, a flange-like closing surface portion provided at an end of the mounting shaft portion, and a valve seat of the closing surface portion. Valve body for a faucet, in which the protrusion provided on the side is integrally molded with resin, and a packing for pressing against the valve seat is fitted on the protrusion, and a tapered press-fitting guide is provided at the tip of the protrusion. It is characterized in that a bulging portion having a surface is formed and the projection has a split cylindrical shape, and the diameter is reduced when the packing is press-fitted and restored when the packing is fitted to hold the packing. It is a thing.

Further, according to the present invention, a mounting shaft portion inserted into and held by a spindle which can be moved forward and backward with respect to a valve seat, and a closing surface portion for closing the valve seat, which is provided at an end of the mounting shaft portion, are integrally molded with resin. In the valve body for a water faucet, the mounting shaft portion has a receiving portion that is pressed against the end surface of the spindle, and the closing surface portion has elasticity at the portion pressed against the valve seat, and the closing surface portion A recess having a diameter smaller than that of the valve hole is formed on the valve seat side.

[0009]

Therefore, if the packing is held by the stopper plug, it can be attached more easily than by screwing, and if the packing is press-fitted into the protrusion with a bulging portion having a split cylindrical shape, the press-fitting is prevented. It is easy to hold the packing securely.

Since the pressing portion of the closing surface portion is provided with an elastic force and a recess having a diameter smaller than the valve hole is provided on the valve seat side of the closing surface portion, when the closing surface portion is pressed against the valve seat, Since the concave portion is slightly deformed in the direction of increasing the diameter, the entire closing surface portion is more flexible and easily bends, and the well-balanced close contact with the valve seat results in high sealing performance. Here, the depth of the recess may be a dimension that can be accommodated within the wall thickness of the closing surface portion or a dimension that extends to the inside of the mounting shaft portion, but in terms of further increasing the deflection width of the entire closing surface portion, Then, a more flexible deformation can be obtained, which is desirable.
Since the mounting shaft portion is provided with the receiving portion that is pressed against the end surface of the spindle, even if the closing surface portion is formed thin to have an appropriate degree of bending, the conventional faucet as shown in FIG. Can be used, for example, without changing the length of the spindle. Furthermore, if the overall shape of the closing surface portion is a substantially umbrella shape or a substantially spherical shape with a constant thickness, the closing surface portion is slightly deformed in the direction in which it closes when pressed against the valve seat, and together with the deformation of the concave portion, an appropriate rigidity is maintained. However, since it becomes more supple and bends in a well-balanced manner, it is more desirable in terms of sealing property with respect to the valve seat.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first to fifth embodiments of the valve body for a faucet according to the present invention will be described with reference to the drawings. The parts common to the conventional example and the parts common to the respective embodiments are designated by the same reference numerals, and the duplicated description will be omitted.

First Embodiment: FIG. 1 shows a first embodiment. On the closing surface portion 12 of the valve body 11, a protrusion 15 having a fitting hole 14 for the stopper plug 13 is provided so as to protrude downward,
It is integrally molded of resin including the mounting shaft portion 16 inserted and held in the spindle 2. Then, with the packing 8 fitted on the protrusion 15, the stopper plug 13 is press-fitted into the fitting hole 14 to hold the packing 8. In addition,
The fitting hole 14 does not have to penetrate to the closing surface portion 12 and the mounting shaft portion 16.

Second embodiment: FIG. 2 shows a second embodiment. On the closed surface portion 12 of the valve body 17, a split cylindrical projection 19 having a plurality of slits 18 is formed downward, and a bulging portion having a press-fitting guide surface 20 having a tapered surface shape at the lower end as a whole. 21 is formed and is integrally formed of resin including the mounting shaft portion 16. Since the central portion of the protrusion 19 is hollow and has the slit 18, when the packing 8 is pressed against the press-fitting guide surface 20, the diameter of the protrusion 19 and the bulge 21 is reduced, and the packing 8 is attached to the protrusion 19. When is fitted, it is restored again by the elasticity of the resin and holds the packing 8.

Third Embodiment: FIG. 3 shows a third embodiment. The valve body 22 has a thin-walled closed surface portion 23, and is integrally molded with resin together with the mounting shaft portion 16 and a flange 24 as a receiving portion provided in the middle portion thereof. The hardness of the resin used in this embodiment is determined in consideration of ensuring the rigidity of the mounting shaft portion 16 and the flange 24, the degree of deformation of the closing surface portion 23 and the recessed portion 25, which will be described later, and the sealing property to the valve seat 3a. It is set. On the valve hole 3 side of the closed surface portion 23, that is, in the center of the lower surface in the figure, a recessed portion 25 that is recessed upward is provided. In this embodiment, the recess 2
Reference numeral 5 has a smaller diameter than the inner diameter of the valve hole 3, and is formed to a depth reaching the flange 24 through the lower end portion 26 of the mounting shaft portion 16. When the spindle 2 is lowered by the operation of the valve opening / closing mechanism, the end surface 10 of the spindle 2 presses the flange 24, the pressing portion 27 of the closing surface portion 23 is elastically pressed against the valve opening 3 against the valve seat 3a, and the recess 25 expands. The valve hole 3 is closed while being deformed in the radial direction and the closing surface portion 23 is slightly bent as a whole. Here, since the distance between the flange 24 and the closing surface portion 23 is set according to the distance between the end surface 10 of the spindle 2 of the conventional faucet and the valve opening 3, it is compatible with the conventional valve body 4. ing.

Fourth Embodiment: FIG. 4 shows a fourth embodiment. The valve body 28 has a large diameter portion 29 having a step as a receiving portion between the closing surface portion 30 and the mounting shaft portion 16, and is integrally molded of resin. The diameter of the large diameter portion 29 is the valve opening 3
It is smaller, and its height is set according to the distance between the end face 10 of the spindle 2 of the conventional water faucet and the valve opening 3 as in the third embodiment, and the inside thereof is a recess 31. The closing surface portion 30 is formed in an umbrella shape having a taper surface with a constant thickness that converges toward the upstream side of the flow path,
The upper surface (X portion in the figure) of the closed surface portion 30 has a mortar shape having an inverse tapered surface. When the spindle 2 descends, the closing surface portion 30 is slightly deformed so as to be narrowed, and the large-diameter portion 29 is slightly contracted and deformed, so that the pressing portion 27 is elastically pressed against the valve seat 3a. In addition, the water pressure applied to the inside of the recess 31 acts in the direction of expanding the large diameter portion 29,
The sealing property of the pressing portion 27 can be improved.

Fifth Embodiment: FIG. 5 shows a fifth embodiment. The valve body 32 has a flange 33 as a receiving portion at one end and a mounting shaft portion 34 which is inserted into and held by the spindle 2 from the other end, and an insertion hole 35 formed at the shaft center of the mounting shaft portion 34.
Closure surface portion 37 having a shaft portion 36 inserted into and fixed to
And are molded separately from resin. The closing surface portion 37 as a whole is formed in a substantially spherical shape that is convex downward in the figure and has a uniform thickness, and in the central portion is a concave portion 38 that is formed in a substantially spherical shape that is concave upward in the figure and is uniform in thickness. Are formed. That is, the upper surface (Y portion in the drawing) of the closing surface portion 37 has a substantially spherical shape that is concave downward. When the spindle 2 descends, the closing surface portion 37 is slightly deformed so as to be narrowed, and the recess 38 is slightly reduced in diameter, and the pressing portion 27 is elastically pressed against the valve seat 3a. Since the closing surface portion 37 and the concave portion 38 are combined in the opposite spherical directions in this manner, the closing surface portion 37 exhibits ideal flexibility and the sealing property between the pressing portion 27 and the valve seat 3a is further enhanced. You can The reason why the mounting shaft portion 34 and the closing surface portion 37 are separately formed in this embodiment is mainly due to the convenience of die cutting at the time of resin molding. If the division is appropriately changed, it can be molded as an integral body.

In the first to fifth embodiments described above, the mounting shaft portions 16 and 34 are as shown in the sectional view of FIG.
It has a substantially cross shape in which four grooves extending in the axial direction are formed, and its effective diameter D is slightly larger than the mounting hole of the spindle 2. Therefore, when the spindle 2 is inserted into the spindle 2, a proper change in the mounting shaft portions 16 and 34 can be obtained.
A stable holding force is obtained inside.

[0018]

As described above, the present invention optimizes the shape of the resin valve body, so that it is possible to provide a valve body for faucets having excellent productivity and sealing properties. That is, since the packing is attached by pushing it into a stopper plug or a protrusion with a bulging portion having a split cylindrical shape, it is possible to easily attach the packing as it is to the closed surface portion. Even for the abandoned ones, the pressing portion of the closing surface has elastic force and the valve seat side of the closing surface is provided with a recess having a diameter smaller than the valve hole, so that the entire closing surface is more flexible when the valve is closed. Since it flexes and adheres to the valve seat in a well-balanced manner, there is an effect that a high sealing property can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a valve body for a water faucet according to a first embodiment of the present invention.

FIG. 2 is a side view showing a valve body for a water faucet of a second embodiment according to the present invention.

FIG. 3 is a sectional view showing a valve body for a water faucet of a third embodiment according to the present invention.

FIG. 4 is a sectional view showing a valve body for a water faucet according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view showing a valve body for a water faucet according to a fifth embodiment of the present invention.

FIG. 6 is a cross-sectional view orthogonal to the axis of the mounting shaft portion.

FIG. 7 is a side view in which a part of a valve structure for explaining a conventional valve body for a water faucet is cut away.

[Explanation of symbols]

 1 Valve opening / closing mechanism 2 Spindle 3 Valve hole 3a Valve seat 8 Packing 10 End face of spindle 11,17,22,28,32 Valve body 12,23,30,37 Closing surface 13 Stop plug 14 Fitting hole 15,19 Projection 16 , 34 Mounting shaft part 20 Press-fitting guide surface 21 Bulging part 24, 33 Flange (receiving part) 25, 31, 38 Recessed part 27 Pressing part 29 Large diameter part (receiving part) 36 Shaft part

Claims (5)

[Claims] 1. A mounting shaft portion that is inserted and held in a spindle that is movable back and forth with respect to a valve seat, a flange-shaped closing surface portion provided at an end of the mounting shaft portion, and a valve seat side of the closing surface portion. In a valve body for a faucet, which is integrally molded with resin and has a packing for pressing against the valve seat fitted on the projection, a fitting hole is formed in the projection, and the fitting hole is press-fitted into the fitting hole. A valve body for a water faucet, characterized in that the packing is retained by the stopper plug in a state in which the packing is fitted to the protrusion. 2. A mounting shaft portion which is inserted into and held by a spindle which is movable back and forth with respect to a valve seat, a flange-shaped closing surface portion provided at an end of the mounting shaft portion, and a valve seat side of the closing surface portion. A valve body for a faucet, which is integrally molded with resin and the packing for pressing against the valve seat is fitted to the protrusion, and has a tapered press-fitting guide surface at the tip of the protrusion. For a faucet characterized by a bulging portion and a projecting portion with a split cylindrical shape that reduces the diameter when the packing is pressed and restores when the packing is fitted to hold the packing. Valve body. 3. A water faucet in which a mounting shaft portion inserted and held in a spindle that is movable back and forth with respect to a valve seat and a closing surface portion for closing the valve seat provided at an end of the mounting shaft portion are integrally molded of resin. In the valve body of, the mounting shaft has a receiving portion that is pressed against the end surface of the spindle, the closing surface has elasticity at the portion pressed against the valve seat, and the valve seat side of the closing surface is A valve body for a water faucet, wherein a recess having a diameter smaller than that of the valve hole is formed in the valve body. 4. The closed surface portion has a substantially umbrella shape.
The valve body for a water faucet according to. 5. The valve body for a faucet according to claim 3, wherein the closing surface portion has a substantially spherical shape.