JPS5817978Y2 - seal patch king - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealing backing for sealing between a small diameter pipe and a large diameter pipe.

Conventionally, seal backings have been required to have a high degree of adhesion to pipes.

However, when closing a small-diameter pipe and a large-diameter pipe with a seal backing, it is very difficult to align the centers of the small-diameter pipe and the large-diameter pipe, and as shown in Fig. As a result, there were wide and narrow gaps between the small-diameter tube and the large-diameter tube.

In addition, the seal backing had weaker adhesion with the larger diameter outer tube in areas with wide gaps, and on the contrary, stronger adhesion with the larger diameter outer tube in areas with narrower gaps.

As a result, a gap was created between the inner tube with a smaller diameter and the outer tube with a larger diameter, making it impossible to fully demonstrate its ability as a backing.

The present invention overcomes the above-mentioned drawbacks of the prior art.

The structure of the present invention is such that when inserting a small-diameter pipe into a large-diameter pipe and blocking the space between the two pipes with a seal backing, the wall thickness of the part of the seal backing that comes into pressure contact with the large-diameter pipe and the communicating part is reduced. The wall thickness is thicker than that of the part that comes into pressure contact with the small diameter pipe to ensure accurate positioning of the small diameter pipe.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the present invention will be described with reference to the drawings in the case of a forced air supply/exhaust type combustion appliance.

In the figure, 1 is a cylindrical sleeve that penetrates the wall surface 2;
Reference numeral 3 denotes an air supply/exhaust pipe of a forced air intake/exhaust type combustion appliance 5 held within the sleeve 1 via a seal backing 4.

As shown in FIG. 1, this seal backing 4 consists of a part A that comes into pressure contact with the outer peripheral surface of the supply/exhaust pipe 3, a part C that comes into pressure contact with the inner peripheral surface of the sleeve 1, and a part B that connects these two parts. The thickness tb of Bi- and C is greater than the thickness ta of portion A.

In the above configuration, when the supply/exhaust pipe 3 of the forced supply/exhaust type combustion appliance 5 is pulled out to the outside, the wall surface 2
The sleeve 1 may be penetrated through the sleeve 1, and the air supply/exhaust pipe 3 fitted with the seal backing 4 may be inserted and held within the sleeve 1.

In this case, since the wall thickness tb of portions B$- and C of the seal backing 4 is thicker than the wall thickness ta of portion A, it is difficult to deform.
Therefore, as shown in FIG.
The adhesion is uniform no matter where it is applied.

The thickness of the seal backing 4 is a value determined according to the diameter and weight of the sleeve 1 and the supply/exhaust pipe 3, and if the seal backing 4 is made with a thickness that allows the effects of the present invention to be fully expected. good.

Therefore, there is no gap between the supply/exhaust pipe 3 and the sleeve 1, and it is possible to prevent rainwater from entering from outside.

Further, in the seal backing 4, it has been found through experiments that the relationship between the wall thickness tb and ta is best when the relationship is tb-(1,1 to 1.5) ta.

As described above, the present invention provides a sealing backing that does not create a gap between a large-diameter pipe and a small-diameter pipe and can fully fulfill its role as a sealing backing. It is something that you have.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a seal backing according to an embodiment of the present invention, Fig. 2 is an exploded perspective view showing the state when the seal backing is used in a forced air supply/exhaust type combustion appliance, and Fig. 3 is an essential part of the seal backing. Partial sectional view, FIG. 4C is a sectional view showing a state in which a conventional seal backing is used to close a space between a small diameter pipe and a large diameter pipe. 1... Sleeve, 3... Supply and exhaust pipe, 4... Seal backing.

Claims (1)

[Scope of utility model registration request] It consists of a part that comes into pressure contact with the outer peripheral surface of the small diameter pipe, a part that comes into pressure contact with the inner peripheral surface of the large diameter pipe into which the small diameter pipe is inserted, and a connecting part of the side part, and a part that comes into pressure contact with the large diameter pipe. A seal backing characterized by the thickness of the connecting part being thicker than that of the part that comes into pressure contact with the small diameter pipe.