JPS63101179A - Drainage plug - Google Patents

Abstract

PURPOSE:To prevent intrusion of water, noise or dust through a drainage hole, by composing a portion of a drainage plug body to be fitted in the drainage hole from water absorbing rubber and enabling communication between the inside and the outside of a panel through swelling function of water absorbing rubber. CONSTITUTION:A recess 4 is formed in the center of a rubber plug body 3 fitted in a drainage hole 1 and a valve body section 5 is projected integrally. A rib 6 is projected from the circumference of the valve body section 5 so as to form a space section 7. A projecting section 9 composed of water absorbing rubber is formed in the center of the valve body section, and the height of said projecting section 9 is set to be lower than the height of the rib 6 under the condition where said section 9 is not swelled with water. Upon swelling of the projecting section 9, the valve body section 5 is deformed to open the space section 7 to the outside so as to ensure the drainage path.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a drain plug for draining water that has entered inside a body panel of an automobile, for example.

As a conventional technique, for example, there is a structure of a drain plug attached to the floor panel or rear fender of an automobile, as disclosed in Japanese Patent Application Laid-Open No. 60-45481. This type of conventional drainage plug has a drainage channel communicating with the inside and outside of the car body panel in a part of the plug body that fits into the drain hole of the car body panel, and also drains muddy water etc. from the outside of the car body panel to the inside. Intrusion! It has a backflow prevention function added to the prevention function.

Problems to be Solved by the Invention Although the above-mentioned drainage plug has a backflow prevention function, the drainage channel is always in communication, so it is possible to reliably prevent water from entering. However, it is impossible to block out outside noise and dust.

Determined Means to Solve Problems The present invention provides a drainage plug in which the drainage channel is opened only when drainage is necessary, and is otherwise closed to block noise and dust. It is.

Specifically, as shown in the examples, part of the plug body
It is made of water-absorbing rubber, and the swelling action of the water-absorbing rubber forms seven drainage channels that communicate with the inside and outside of the panel. Water-absorbing rubber absorbs water when it comes into contact with water.
It has the property of swelling.

Since a part of the working plug body is made of water-absorbing rubber, the plug body itself functions as an on-off valve.

In other words, when water accumulates inside the panel and the water-absorbing rubber swells, a drainage channel is secured and the water inside the panel is discharged to the outside.

On the other hand, when the water-absorbing rubber is dry, the water-absorbing rubber contracts and blocks the drainage channel, blocking out noise and dust.

Embodiment FIGS. 1 to 4 are diagrams showing an embodiment of the present invention,
1 is a drain hole formed in the panel 2, and 3 is a plug body made of T rubber that is fitted into the drain hole 1.

The plug body 3 has a recess 4 formed in its center and a valve body 5 integrally formed to protrude.

As shown in Figure @3 and Figure @4, a sharp-pointed rib 6 is protruded from the peripheral edge of the valve body portion 50, thereby forming a space 7.
is formed. The recess 4 and the space 7 are communicated with each other by a drainage groove 8.

Further, a bulge [9] made of water-absorbing rubber is formed in the center of the valve body 5, and the height h of the bulge 9 is
is set smaller than the height of the lip 6 in a state where it is not absorbing water. Reference numeral 10 denotes a narrow easy-to-bend portion that facilitates bending of the valve body portion 5.

In the above structure, normally the rib 6 is in elastic contact with the panel 2 as shown in FIG. is blocked by the elastic contact of lip 6. If water intrudes into the inside of the panel 2, the water will accumulate in the recess 4 and the space 7.

When water accumulates in the space [7], the raised portion 9 formed of water-absorbing rubber absorbs water and swells. When the raised portion 9 swells, the reaction force causes the valve body [5 to bend and deform as shown in FIG.
is opened to the outside and a drainage channel is secured. As a result, the water accumulated in the space 7 is discharged to the outside in the form of an overflow.

Furthermore, when the raised portion 9 dries, the valve body portion 5 is restored to its original state, blocking the intrusion of noise, dust, etc.

5 and 6 are views showing another embodiment 1 of the present invention, in which a part of the plug body 13 fitted into the drain hole 1, that is, the fan-shaped portion in FIG. It is made up of a lot of things.

In this embodiment, normally the lip portion 11 of the plug body 13 comes into elastic contact with the panel 2 to block the inside and outside of the panel 2, but water that collects inside the panel 2 comes into contact with the water absorbing rubber 19. The water-absorbing rubber 19 swells. When the water-absorbing rubber 19 swells, the entire water-absorbing rubber 19 and its vicinity lifts up from the panel 2, as shown by the imaginary line in FIG.
A drain ball is formed between the panel 2 and the plug body 13. As a result, water accumulated inside the panel 2 is discharged to the outside.

Effects of the Invention According to the present invention, a drainage channel is secured only when the water-absorbing rubber swells, and in other cases, the inside and outside of the panel are shut off, so that noise, dust, etc. can be removed without impairing the drainage function. can prevent intrusion.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing one embodiment of the present invention, and Fig. 3 is an enlarged view of the main part of Fig. 2, Fig. 4 is a perspective view of the main part of Fig. 3, and Fig. 5 is a main part diagram. Other embodiments of the invention! The sectional view shown in FIG. 6 is a plan view of FIG. 5. DESCRIPTION OF SYMBOLS 1... Drain hole, 2... Panel, 3.13... Plug body, 5... Valve body part, 8... Drain groove, 9... Protuberance W5 (water absorbing rubber), 12... ...Drainage channel, 19...Water-absorbing rubber. 2 people outside

Claims (1)

[Claims] (1) In a drainage plug that fits into a drainage hole of a predetermined panel, a part of the plug body is made of water-absorbing rubber, and the swelling action of the water-absorbing rubber forms a drainage channel that communicates between the inside and outside of the panel. A drain plug characterized by: