JPH029745Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of a drain plug provided in a bathtub, washbasin, or the like.

[Conventional technology]

A conventional drain plug 1 is composed of a drain hole 2 and a plug body 3, as shown in FIG. Drain hole 2
A drainage hole 2b is drilled through the drain hole 2b, which has a female seal surface 2a which is a spherical conical surface that becomes smaller in a quadratic curve toward the bottom. The plug body 3 also includes a skirt portion 3b on which a male seal surface 3a is formed, which is removably fitted onto the female seal surface 2a of the drain hole 2b, and an opening peripheral portion of the drain hole 2b (of the drain hole fitting 2). It has an annular flange cover part 3c that protrudes from the upper part of the skirt part 3b toward the outer periphery so as to cover the upper end surface) 2c. Like the female seal surface 2a described above, the male seal surface 3a is also a spherical conical surface that becomes smaller in a quadratic curve toward the lower side.

In this conventional drain plug 1, when the skirt portion 3b of the plug main body 3 is fitted and attached to the drain hole 2b of the drain hole fitting 2, both male and female seal surfaces 2a and 3a are connected to the base side of the male and female seal surfaces 2a and 3a. are fitted in a watertight manner to form a seal portion A. Further, the lower side of the annular brim cover portion 3c and the opening peripheral edge portion 2c, which is the upper end surface of the drain hole 2, form an annular seal portion B.

[The problem that the idea attempts to solve]

By the way, in order to prevent the stopper body 3 from detaching and improve the water-stopping ability, the rigidity of the base of the male seal surface 3a of the skirt portion 3b forming the seal portion A is increased, and the rigidity of the base portion of the female seal surface 2a is increased. It is necessary to be able to apply strong pressure to However, when the rigidity of the root portion of the male seal surface 3a is increased, the amount of elastic deformation of this portion is reduced, and even if the plug body 3 is slightly displaced upward, the watertight fitting between the seal portions A and B is lost. This type of drain plug 1 had a fatal drawback of causing water leakage. Such displacement of the stopper main body 3 may occur, for example, when a bather hooks a connecting chain (not shown) of the stopper main body 3 onto a limb or part of the body;
This is done simply by the user of the washbasin slightly catching the connecting chain of the stopper body 3 with his or her fingers. Therefore,
The conventional drain plug 1 has the drawback that water leakage accidents occur frequently during use, and the function as a faucet is lost.

Moreover, once the plug main body 3 is displaced upward, if the rigidity of the male sealing surface 3a is large, it becomes difficult for the entire skirt portion 3b to enter the drain hole 2b, and the user has to push it in with strong force. Ta. Therefore, while using the bathtub or washbasin, if the stopper body 3 is unintentionally caught on a limb or the like and displaced, hot water, etc. may leak out of the bathtub or washbasin. It was hot.

Further, the above-mentioned problem that water leakage occurs even if the plug body 3 is slightly displaced can be solved by increasing the amount of elastic deformation of the male sealing surface 3a. However, if the amount of elastic deformation is increased, the rigidity will be lost and the watertightness required for practical use will be reduced. In other words, in the case of the conventional drain plug 1, it is impossible to satisfy the contradictory requirements of increasing the rigidity and increasing the amount of elastic deformation at the same time, and the water stopping ability is insufficient under all circumstances. It was not possible to provide a faucet that could perform this function.

[Means to solve the problem]

The present invention improves and eliminates the above-mentioned conventional drawbacks, and aims to provide a drain plug that can easily fit into a drain hole and provide a water-tight fit even when the plug body is tilted. It is something.

Therefore, the means adopted by the present invention to solve the above problem is provided with a drainage hole having a female seal surface that is a spherical conical surface that becomes smaller in a quadratic curve toward the bottom. and a skirt portion in which a male sealing surface, which is a spherical conical surface that becomes smaller in a quadratic curve shape as it goes downward, is removably fitted into the drainage hole. In a drain plug consisting of a plug main body having an annular flange lid which is placed in contact with the upper end surface of the device, the inside of the skirt portion is made empty, and the cross-sectional thickness of the skirt portion is decreased as it goes downward. and an annular protrusion is provided at the bottom of the skirt of the stopper body.
An arbitrary point at the base of the skirt part is designated as b, and the outermost point of the annular protrusion located opposite to the arbitrary point b through the vertical center of the plug body is designated as a, and the two points a and b are If the distance between the two is L, and the opening diameter of the upper end of the drainage hole is D, then the annular protrusion is D>L
The following relationship is satisfied.

[Effect]

The annular protrusion formed at the bottom of the skirt part, which has a hollow interior and whose wall thickness gradually becomes thinner, is
Even when the plug body is fitted into the drain hole in an inclined position, it is sized to easily fit into the drain hole. When the skirt part is completely fitted into the drain hole, the annular protrusion part is watertightly fitted into the female seal surface which is a spherical conical surface. Therefore, in the drain plug of the present invention, even if the plug body moves slightly upward due to an accident, the annular protrusion formed in the thin wall part of the skirt part of the plug body with excellent elastic deformation will keep the drain hole in place. It follows and contacts the female seal surface by its own elastic action, and is always watertightly fitted, so the integrity of the water-stopping ability is ensured.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below based on embodiments shown in the drawings.

1 to 3 relate to an embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional view of the drain plug 11 showing the closed state, and FIGS. 2 and 3 show the drain plug 11 in the middle of being closed. It is a longitudinal cross-sectional view of the drain plug 11 shown. The drain plug 11 is connected to the drain hole 1 as in the conventional case.
2 and a stopper body 13 made of rubber or the like.

The drain hole 12 is provided with a drain hole 12b having a female seal surface 12a that is a spherical conical surface that becomes smaller in a quadratic curve toward the lower side. The plug body 13 also includes a skirt portion 13b on which a male seal surface 13a is formed, which is removably fitted onto the female seal surface 12a of the drain hole 12b, and a skirt portion 13b that protrudes toward the outer circumferential side from the upper part of the skirt portion 13b. It has an annular collar lid part 13c. The male sealing surface 13a, like the female sealing surface 12a described above, is a spherical conical surface that becomes smaller in a quadratic curve toward the lower side. The inside of the skirt portion 13b is a cavity 15,
The cross-sectional thickness becomes thinner toward the bottom. In this embodiment, an annular protrusion 14 is integrally formed in the lower part of the skirt part 13b, which has an extremely thin cross-sectional thickness and excellent elasticity. The cross-sectional shape of the annular protrusion 14 may be semicircular or triangular, and may have any suitable shape.

The annular protrusion 14 takes into consideration the case where the plug body 13 is fitted into the drain hole 12b in an inclined position, and even when fitted in such an inclined position, a water-tight fit can be achieved naturally. Its size is the second
It is limited as shown in the figure. That is, let b be an arbitrary point on the base of the skirt portion 13b, and let a be the outermost point of the annular protrusion 14 that faces the arbitrary point b through the vertical center F of the plug body 13. Then, if the distance on the imaginary line G connecting the two points a and b is L, and the upper end opening diameter of the drainage hole 12b is D, then the annular protrusion 14 is D>L.
I'm looking for a satisfying relationship. In this case, it is preferable that the distance L is slightly smaller than the opening diameter dimension D. Although the annular protrusion 14 is formed in one strip in the illustrated embodiment, it is also possible to form a plurality of strips.

Next, a procedure when the plug body 13 of the drain plug 11 configured as described above is installed in an inclined position will be explained with reference to FIGS. 1 to 3. First, as shown by the solid line in FIG. 2, an arbitrary point on the lower edge of the annular collar cover 13c of the stopper body 13 comes into contact with the opening periphery (upper end surface) 12c of the drain hole 12 and is inclined. Assume that the position is as follows. Stopper body 13
arrow H due to its own weight or the user's operating force.
It will now rotate in the direction shown. That is, the plug body 13b is rotated so that the root portion of the male sealing surface 13a comes into contact with the upper end opening portion of the drain hole fitting 12. Here, the annular protrusion 14 of the stopper body 13
As mentioned above, is the virtual line G connecting point a and point b
The distance L between the drain hole 12b and the drain hole 12b is made slightly smaller than the upper end opening diameter dimension D of the drain hole 12b. Therefore, the second
In the state of the inclined posture shown by the solid line in the figure, the outermost portion of the annular protrusion 14 on the rotating side (the portion corresponding to point a) collides with the opening peripheral portion 12c of the drain hole 12b. There is no. Therefore, the entire skirt portion 13b of the plug body 13 smoothly enters the drain hole 12b, as shown by the solid line in FIG.

Then, the plug body 13 further rotates in the direction of arrow H. As a result, the annular protrusion 14 has the entire lower surface of the annular collar cover 13c at the opening peripheral edge 1 of the drain hole 12.
2c (the state shown by the chain line in FIG. 3), the female sealing surface 12a of the drain hole 12
It comes into contact with the seal part C for a watertight fit.
form. In this case, the seal portion C exerts its own elastic action on the female seal surface 12a because the position of the skirt portion 13b where the annular protrusion 14 is provided is a portion with a small cross-sectional thickness and excellent elastic deformation. It easily follows and makes contact, ensuring excellent watertightness.

Finally, the stopper body 13, as shown in FIG.
The entire lower surface of the annular brim cover 13c comes into contact with the opening periphery 12c of the drain hole 12, forming a seal part A and a seal part B using rigidity similar to the conventional one, and the installation is completed.

As described above, in the drain plug 11 of this embodiment, even if the plug body 13 is in an inclined position, the drain hole 12 can be easily opened by its own weight or the user's operating force.
In addition to seal portions A and B that fit into b and eliminate the conventional rigidity, a seal portion C that utilizes new elasticity can be formed, and it is possible to exhibit excellent water-stopping ability. Therefore, even if the connecting chain of the stopper main body 13 is caught on a limb or the like during use of a bathtub or washbasin, causing the stopper main body 13 to float up, resulting in an inclined fitted state, the stopper main body It is possible to return to the closed state naturally by the own weight of the valve 13 or the load of the stored water.

Incidentally, it is of course possible to attach the plug body 13 with the vertical center F of the plug main body 13 and the vertical center of the drain hole 12b substantially aligned so that they are substantially parallel to each other. Furthermore, the present invention is not limited to the shape and structure of the above-described embodiments, and the male and female seal surfaces 12a, 13a
The curvature of the ring, the number of annular protrusions 14, the cross-sectional shape, etc. can be changed as appropriate.

[Effect of idea]

As is clear from the above explanation, the drain plug according to the present invention has the following practical effects.

(b) The position and size of the annular protrusion formed on the male seal surface of the plug body are limited to the opening diameter of the female seal surface of the drain hole, so even if the plug body is in an inclined position, the plug The skirt portion of the main body can be fitted into the drainage hole, and the installation work is extremely simple.

(b) Also, just before the entire lower surface of the annular flange of the plug body comes into contact with the opening periphery of the drain hole, the annular protrusion formed on the lower side of the skirt of the plug body touches the drain hole. A watertight fit to the female seal surface,
Form a seal part. This is because the area where the annular protrusion is formed is a region with excellent elastic deformation of the skirt portion, so that it follows and contacts the female sealing surface of the drain hole using its own elastic action. Therefore, in addition to the conventional seal structure that utilizes rigidity, it is possible to obtain a new seal portion that utilizes elasticity, and it is possible to provide a drain plug that has extremely excellent water-stopping ability.

(c) Furthermore, even if the plug body moves slightly upward from the drain hole due to an accident during use, the plug body will naturally fit back into the drain hole due to its own weight or the load of stored water. Moreover, the annular protrusion of the skirt part, which has excellent elastic deformation when moved slightly upward, follows and contacts the female seal surface, making it possible to maintain a watertight fit and prevent accidents during use. There were no water leak accidents.

[Brief explanation of drawings]

Figures 1 to 3 relate to a drain plug according to an embodiment of the present invention, in which Figure 1 is a vertical cross-sectional view of the entire valve in a closed state, and Figures 2 and 3 are views in which the plug body is inclined. FIG. 4 is a vertical cross-sectional view showing a conventional drain plug. 11...Drain plug, 12...Drain hole, 12a...
... Female seal surface, 12b ... Drain hole, 12c ... Opening periphery, 13 ... Plug body, 13a ... Male seal surface, 13b ... Skirt part, 13c ... Annular flange cover, 14 ... Annular projection Part, 15... empty cavity.

Claims (1)

[Scope of utility model registration request] A drain hole fitting is provided with a drainage hole having a female seal surface that is a spherical conical surface that becomes smaller in a quadratic curve as it goes downward; A plug main body comprising a skirt portion in which a male sealing surface having a spherical conical surface is removably fitted into the drain hole, and an annular flange portion placed in contact with the upper end surface of the drain hole fitting. In the drain plug, the inside of the skirt part is made empty, the cross-sectional thickness of the skirt part becomes thinner toward the bottom, and an annular protrusion is provided at the bottom of the skirt part of the plug body. An arbitrary point at the base of the skirt part is designated as b, the outermost point of the annular protrusion located opposite to the arbitrary point b through the vertical center of the plug body is designated as a, and the two points a and The drain plug is characterized in that the annular protrusion satisfies the relationship D>L, where L is the distance between B and B, and D is the opening diameter of the upper end of the drain hole.