JPH0579101A - Joint material - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a joint material which improves the fire resistance of a building and is excellent in workability and durability. [Constitution] Long gasket body 4 made of resin material
A long spring body 5 made of a refractory material that expands and closes the joint space 3 when the gasket body 4 burns out in the cross section of
Through.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint material which is interposed in a joint portion such as an outer wall of a building.

[0002]

2. Description of the Related Art Conventionally, a joint portion of an outer wall of a building (joint space)
In some cases, a joint material having not only a waterproof function but also a fire resistant function is used in order to improve its fire resistant performance. FIG. 4 shows a conventional example of a joint material having such a fire resistance function. That is, the joint material 10 is constituted by fitting the spring body 12 made of a fire resistant material to the outer end of the gasket body 11 made of a rubber elastic body, and thus the outer wall 13
Even if the gasket body 11 is damaged by a flame from the outside, the spring body 12 on the back side of the gasket body 11 blocks the joints and prevents the flame from entering the inside of the building, which is said to improve the fire resistance of the building. (See Japanese Patent Laid-Open No. 63-167831)
..

[0003]

However, in the above-mentioned joint material, since the spring body 12 is attached to the outer end portion of the gasket body 11, the surface of the gasket body 11 which is extremely softer than the spring body 12 is While pressing, the spring body 12
The joint material 10 must be inserted into the joint against the spring force of, and it takes a lot of time and effort to mount the joint material 10,
Moreover, since the gasket body 11 cannot be mounted unless it is pressed with a relatively strong force, the gasket body 11 may twist and meander after mounting.

Further, if the spring body 12 is exposed to the outside of the gasket body 11, the spring body 12 is corroded by water flowing down in the joints, which is not preferable in terms of durability. In view of such circumstances, it is an object of the present invention to simultaneously improve the fire resistance of a building and the workability and durability of a joint material.

[0005]

[Means for Solving the Problems] In order to achieve the above object,
The present invention has taken the following technical means. That is, the invention according to claim 1 is a long-sized refractory material that expands when the gasket main body 4 burns out and closes the joint space 3 in the cross section of the long gasket main body 4 made of a resinous material. It is characterized in that the spring body 5 of is inserted.

According to a second aspect of the invention, the spring body is
5 is made of a shape memory alloy.

[0007]

[Operation] The spring body 5 expands to close the joint space 3 when the gasket body 4 is burned, and prevents the flame from entering the inside of the building. Since the spring body 5 is inserted in the cross section of the gasket body 4, it acts as a core material for the joint material 1 and is shielded from moisture flowing down in the joint space 3.

According to the second aspect of the present invention, the spring body 5 is made of a shape memory alloy, and does not exert a spring force at room temperature, and is set so as to expand only when the temperature exceeds a predetermined temperature. To be done.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a joint material, which is loaded in a joint space 3 in the vertical direction formed between outer walls 2 having fire resistance. The joint material 1 includes a gasket body 4 as a sealing material and a spring body 5 as a core material inserted in a cross section of the gasket body 4.

The gasket body 4 is a long member made of a rubber-based resin material such as EPDM rubber, and is integrally provided with sealing pieces 6 protruding on both left and right sides thereof. A substantially O-shaped accommodation hole 7 is provided in the center of the cross section of the gasket body 4 so as to penetrate in the longitudinal direction of the gasket body 4, and the spring body 5 is inserted into the accommodation hole 7. Spring body 5
Is a metal material having fire resistance, for example, stainless steel, and is formed by winding a metal plate body wider than the joint space 3 in a substantially O shape in the width direction. Is located outside the building (upper side of Figure 1 (a)),
It is accommodated in the accommodation hole 7. The metal plate body that constitutes the spring body 5 is made of a spring material having a sufficient restoring force so that the spring body 5 can be expanded into the substantially original state even after being wound once as described above. . Therefore, as shown in FIG. 1A, when the spring body 5 is inserted into the accommodation hole 7,
Since the gasket body 4 is constantly receiving a pressing force directed outward from the spring body 5, as shown in FIG. 1 (b),
If the gasket body 4 is burned out by a flame from the outside of the building, the spring body 5 expands and the joint space 3
Is to be blocked.

The spring body 5 may be made of a shape memory alloy such as a Ti-Ni alloy or a Cu-Zn-Al alloy. In this case, the shape memory alloy may be made to memorize the shape in the expanded state shown in FIG. 1 (b), and then it may be wound and inserted into the accommodation hole 7 of the gasket body 4 as described above. .. The shape transformation temperature of this shape memory alloy is the maximum temperature of the gasket body 4 (50 to 60
However, it is preferable to set the temperature near the burning temperature of the gasket body 4 if possible.

According to the present embodiment having the above-mentioned structure, the spring body 5 which expands when the gasket body 4 is burned and closes the joint space 3 is inserted into the cross section of the gasket body 4, so that the gasket body 4 is expanded. Not only the spring body 5 can ensure the fire resistance function, but the spring body 5 in the gasket body 4 serves as the core material of the joint material 1 to facilitate the mounting of the joint material 1 in the joint space 3 and the spring body 5. Since 5 does not come into contact with the water flowing down in the joint space 3, the workability and durability of the joint material 1 can be greatly improved.

Further, when the spring body 5 is made of a shape memory alloy, the spring body 5 does not yet exert a spring force when the alloy is wound, and the shape after winding can be self-supporting.
This has the effect of making it easier to insert the spring body 5 into the gasket body 4. Although one embodiment of the present invention has been described above, the present invention is not limited to this.

That is, when the spring body 5 is made of ordinary stainless steel or the like, the periphery of the spring body 5 may be covered with a holding layer 8 such as PVC as shown in FIG. Since this retaining layer 8 reliably retains the winding shape of the spring body 5 against the restoring force of the spring body 5, the material of the gasket body 4 should be softer than that of the above embodiment. You can

Further, as shown in FIG. 3, the gasket body is
The inside of the cross section of 4 may be solid.

[0016]

As described above, according to the present invention,
Since the spring body 5 closes the joint space 3 when the gasket body 4 burns down, the fire resistance of the building can be improved, and since the spring body 5 is inserted in the cross section of the gasket body 4, The workability and durability of the material 1 can be improved.

According to the second aspect of the invention, the spring body 5 can be inserted into the gasket body 4 in a state where the spring body 5 does not exert a spring force, so that the joint material 1 can be processed more easily. You can

[Brief description of drawings]

FIG. 1 is a plan cross-sectional view of a joint material showing an embodiment of the present invention, (a) showing the gasket body before burning, and (b) showing after burning.

FIG. 2 is a cross-sectional view showing a modified example of a joint material.

FIG. 3 is a sectional view of the same.

FIG. 4 is a plan sectional view of a conventional joint material.

[Explanation of symbols]

 1 Joint material 3 Joint space 4 Gasket body 5 Spring body

Claims (2)

[Claims] 1. A length of a refractory material that expands when the gasket body (4) burns down and closes the joint space (3) within the cross section of a long gasket body (4) made of a resinous material. Joint material characterized in that the spring body (5) of the shaku is inserted. 2. The joint material according to claim 1, wherein the spring body (5) is made of a shape memory alloy.