JP2021075839A - Fire-resisting belt for expansion joint - Google Patents

Abstract

To provide a fire-resisting belt allowing easy connecting work of the fire-resisting belt and easy attachment work to a skeleton.SOLUTION: A fire-resisting belt 1 for an expansion joint related to the present invention, provided in a space of skeletons of two adjacent buildings, includes a fiber sheet layer 2 containing 96 mass% or more of SiO2 and a coating layer 3 coating at least one face of the fiber sheet layer 2 with fire-retardant resin.SELECTED DRAWING: Figure 1

Description

The present invention relates to a refractory zone for expansion joints.

The refractory zone used for the expansion joint is installed between the skeletons for the purpose of preventing the movement of flames and the like from the gap between the skeletons of two adjacent buildings.
Conventionally, as a refractory band for expansion joints (hereinafter, simply referred to as "refractory band"), for example, a refractory band having a thickness of 22 mm has been used (see Patent Document 1).

JP 2002-242333

When a plurality of refractory bands are connected in the longitudinal direction and used in a long shape, if the refractory bands are thick, it is difficult to connect the refractory bands and attach them to the skeleton.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to facilitate the work of connecting the refractory belt and the work of attaching it to the skeleton.

The refractory zone according to the present invention is a refractory zone for expansion joints provided in the gap between the skeletons of two adjacent buildings in order to solve the above-mentioned problems, and is a fiber sheet layer containing 96% by mass or more of _{SiO 2.} A coating layer in which at least one surface of the fiber sheet layer is coated with a flame-retardant resin is provided.

The refractory belt according to the present invention can facilitate the work of connecting the refractory belt and the work of attaching it to the skeleton.

Sectional drawing of the refractory zone which concerns on embodiment of this invention. Explanatory drawing which shows the mounting structure of the refractory zone which concerns on embodiment of this invention. The explanatory view which shows the connection structure of the refractory zone and another refractory zone which concerns on embodiment of this invention.

An embodiment of the refractory zone according to the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of the refractory zone 1 according to the embodiment of the present invention.

The refractory band 1 includes _{a fiber sheet layer 2 containing 96% by mass or more of SiO 2} and a coating layer 3 in which at least one surface of the fiber sheet layer 2 is coated with a flame-retardant resin.
The refractory zone 1 has a thickness of 0.5 mm to 5 mm.

The fiber sheet layer 2 is formed by forming a fire-resistant glass fiber into a sheet by a predetermined method and acid-treating the sheet. _{In the present embodiment, the content of SiO 2} in the fiber sheet layer 2 before the acid treatment is 52 to 56% by mass, whereas _{the content of SiO 2} after the acid treatment is 96% by mass or more. _{The content of Al 2} O _{3 in} the fiber sheet layer 2 before the acid treatment is 12 to 16% by mass, whereas _{the content of Al 2} O ₃ after the acid treatment is 4% by mass or less. _{Since the content of SiO 2} after the acid treatment is 96% by mass or more, the refractory zone 1 can withstand continuous use for a long time even at a high temperature of 1000 ° C. or higher.
The fiber sheet layer 2 has a thickness of 0.5 mm to 5.0 mm. Examples of the form of the sheet include woven fabrics, knitted fabrics, non-woven fabrics, and the like, and short fibers and long fibers can be processed and used by a known method.

The coating layer 3 is formed by coating at least one surface of the fiber sheet layer 2 with a flame-retardant resin. By coating with a flame-retardant resin, it is possible to improve the flame-shielding and smoke-shielding performance of the refractory zone 1. As the flame-retardant resin, urethane resin, epoxy resin, phenol resin and the like can be used. In the present embodiment, the flame-retardant resin is coated by impregnation, but the coating method is not particularly limited.
The coating layer 3 has a thickness of 0.1 mm to 1.0 mm.

FIG. 2 is an explanatory view showing a mounting structure of the refractory band 1 according to the embodiment of the present invention.

The refractory zone 1 includes a fixing portion 11 for directly fixing the refractory zone 1 to the skeletons 4 and 4.
The fixing portions 11 are formed at both ends of the refractory zone 1 in the opposite direction (left-right direction in FIG. 2) of the skeletons 4 and 4, and are fixed to the skeletons 4 and 4 by the fixing member 15. In the present embodiment, a screw is used as the fixing member 15, but the fixing member 15 is not particularly limited, and an appropriate fixing member can be used according to the design of the expansion joint.

It is preferable that the expansion joint is installed without providing a step on the skeletons 4 and 4. Like the refractory band 1 of the present embodiment, the thickness of the refractory band 1 is reduced, and the joint cover (not shown) of the expansion joint is placed in close contact with the refractory band 1, so that the expansion joint and the skeleton 4 are arranged. The step on the upper surface 41 of 4 can be minimized.
Further, by fixing the refractory band 1 to the upper surfaces 41 of the skeletons 4 and 4, the refractory band 1 can cover between the skeletons 4 and 4 without a gap as compared with the case where the refractory band 1 is installed on the facing surface of the skeleton. This makes it possible to reduce flames and smoke from the lower side of the skeletons 4 and 4 passing through the refractory zone 1 (lower side in the vertical direction of the skeletons 4 and 4 in FIG. 2).

As shown in FIG. 2, in the refractory zone 1, the central portion of the refractory zone 1 is inserted into the gaps between the skeletons 4 and 4, and the fixed portion 11 is loosened in a U shape, and the fixed portion 11 is placed on the upper surfaces 41 of the skeletons 4 and 4. Placed and fixed in. The refractory zone 1 is installed so that the coating layer 3 is located in the downward direction. As a result, the flame / smoke shielding effect can be enhanced against the flame / smoke from the lower side of the skeletons 4 and 4. In addition, by coating with resin, fraying of glass fibers can be suppressed and a shape that is easier to process can be maintained. In the present embodiment, the coated surface is on the lower side, but the coated surface is not particularly limited.

In the present embodiment, the fixing portion 11 is directly fixed to the upper surface 41 of the skeletons 4 and 4. As a result, the number of parts can be reduced and the refractory belts to the skeletons 4 and 4 can be reduced as compared with the case where the refractory belt 1 is fixed to the facing surfaces of the skeletons by using the fixing metal fittings as in the prior art. The installation work of 1 can be facilitated.

Further, in the present embodiment, when the fixing portion 11 is fixed to the upper surface 41 of the skeletons 4 and 4, the surfaces where the fixing portion 11 and the skeletons 4 and 4 come into contact are in close contact with each other, and the corner portions 42 of the skeletons 4 and 4 are brought into close contact with each other. cover.

A method of connecting the refractory zone 1 and another refractory zone 1a will be described below.
FIG. 3 is an explanatory diagram showing a connecting structure of the refractory zone 1 and another refractory zone 1a according to the embodiment of the present invention.

When the refractory band 1 is installed over the entire length of the gap between the skeletons 4 and 4, as shown in FIG. 3, the refractory bands 1 are connected by overlapping the longitudinal ends of the plurality of refractory bands 1 and 1a. It is used as a long fireproof band.

The refractory zone 1 includes a folded-back portion 12 for connecting another refractory zone 1a. When the two refractory bands 1 and 1a are overlapped with each other, the folded-back portion 12 has one end in the longitudinal direction of one of the refractory bands 1 located on the lower side in the direction in which the other refractory band 1a is overlapped. It is formed by folding back.

First, on the outer surface of the folded-back portion 12 (the surface in the direction in which the other refractory band 1a is overlapped), the other end portion 10a in the longitudinal direction in which the folded-back portion of the other refractory band 1a is not provided is set in the thickness direction. Overlay. Next, the overlapped folded-back portion 12 and the end portion 10a are fastened with the needle 5. Finally, the needle 5 exposed on the outer surface of the end portion 10a (the surface that is not in contact with the folded portion 12 of one of the refractory bands 1), the end surface 13 of the folded portion 12, and the end surface 13a of the other refractory band 1a. The adhesive tape 6 is attached to the connecting portion (the portion where the folded-back portion 12 and the end portion 10a are overlapped) so as to cover the above.

In FIG. 3, there is only one needle 5, and it is located near the end faces 13 and 13a, but the number and position of the needles 5 are not particularly limited. Further, the adhesive tape 6 preferably has fire resistance, and an aluminum glass cloth tape is used in the present embodiment, but the adhesive tape 6 is not particularly limited.

In the present embodiment, the needle 5 and the adhesive tape 6 are used as the connecting means for the refractory bands 1 and 1a. By using the needle 5 and the adhesive tape 6, even if the adhesive tape 6 is damaged by heat, the fireproof bands 1 and 1a can be maintained in a connected state because they are fixed by the needle 5. Further, with only the needle 5, smoke and flame easily pass through the refractory bands 1 and 1a through the gap between the connecting portions (the portion where the folded-back portion 12 and the end portion 10a are overlapped) of the refractory bands 1 and 1a. However, by covering the connecting portion with the adhesive tape 6 to close the gap, it is possible to prevent the passage of smoke and flame.
Further, in the connecting portion of the refractory zone 1, the refractory zone 1 is triple-layered. Therefore, the fire resistance performance and the flame shielding performance at the connecting portion can be improved.

The refractory zone of the present invention is not limited to the above embodiment, and various improvements and changes can be made without departing from the gist of the present invention. For example, in the present embodiment, the needle 5 and the adhesive tape 6 are used as the connecting means of the refractory bands 1 and 1a, but the refractory adhesive and the adhesive tape may be used.

1 Refractory band 2 Fiber sheet layer 3 Coating layer 4 Frame 5 Needle 6 Adhesive tape 11 Fixing part 12 Folded part 15 Fixing member

Claims (5)

In the refractory zone for expansion joints provided in the gap between the frames of two adjacent buildings
A fiber sheet layer containing 96% by mass or more of SiO _{2 and}
A refractory band comprising a coating layer in which at least one surface of the fiber sheet layer is coated with a flame-retardant resin. The refractory band according to claim 1, wherein the refractory band has a thickness of 0.5 mm to 5 mm. The refractory zone according to claim 1 or 2, wherein both ends of the refractory zone in the opposite direction of the skeleton are directly fixed to the refractory zone. The fireproof band according to any one of claims 1 to 3, wherein the flame-retardant resin is a urethane resin, an epoxy resin, or a phenol resin. The refractory band is a plurality of refractory bands connected by overlapping the end portions in the longitudinal direction of the refractory band in the thickness direction.
When the refractory bands are overlapped, one of the refractory bands located on the lower side has a folded portion formed by folding back one end in the longitudinal direction in the direction in which the other refractory band is overlapped. ,
The refractory band according to any one of claims 1 to 4, wherein the folded portion and the end portion in the longitudinal direction in which the folded portion of the other refractory band is not provided are overlapped and fixed.

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