JPH08158491A - Expansion joint - Google Patents

Abstract

PURPOSE: To ensure that flames and smoke, etc., do not leak out from a gap between skeletons by suspending, inside a gap between the skeletons on the back of a cover plate, a fire resisting band having a coating layer that produces a foaming fire-retardant layer during heating. CONSTITUTION: A cover plate 20 is extended between the skeletons 10, 10 of a structure and used to block a gap between the skeletons 10 as the gap varies. A fire resisting band 50 provided with a coating layer is suspended inside the gap between the skeletons 10 on the back of a cover plate 20. The coating layer produces a foaming fire-retardant layer during heating, and imparts fire insulation and fire resistance to the fire resisting band 50 itself. The foaming fire retardant layer is triggered by the heat or flame of a fire, increases its capacity through foaming, and thus covers the connection between portions of the fire resisting band 50 to prevent generation of a gap, thereby ensuring that the flames and smoke, etc., do not leak out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion joint.

[0002]

2. Description of the Related Art An expansion joint is constructed by covering a gap between building frames, such as a wall frame, a floor frame, etc., with a cover plate so as to follow the dimensional change of the gap. In order to prevent the transmission of flame or the like from the gap at the time of, a fireproof member is stretched on the back side of the cover plate. As the refractory member, a member in which a surface layer of a refractory material such as ceramic fiber is covered with a wire mesh member such as iron is used, and is fixed to a frame through a mounting member such as iron.

[0003]

However, in the above-mentioned conventional example, the refractory member becomes bulky and heavy,
It has a drawback that a great deal of labor is required for handling and fixing work to the body.

Further, since it is difficult to install a single refractory member over the entire length of the gap between the skeletons, it is usually difficult because of the length of the gap and the manufacturing restrictions of the unit refractory member. Although the members are connected to close the gap between the skeletons, in this case, there is a drawback in that the fire resistance performance, particularly the flameproof performance, at the connection portion of the fire resistant members is uncertain.

That is, even if the refractory members are arranged in such a manner that their opposite edges are in close contact with each other, due to an error during construction or due to the relative movement of the frames relative to each other in the longitudinal direction of the gap, the refractory members are connected to each other. There is a possibility that a gap may occur.To prevent this, even if the opposite edges are overlapped and connected, only the edge that is orthogonal to the mounting side edge of the rigid body whose both ends are fixed to the body should be in close contact. It is difficult to polymerize, and the workability is deteriorated.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide an expansion joint which has good workability and can reliably prevent transmission of flame, smoke, etc. from a gap. .

[0007]

According to the present invention, as described above, the above-mentioned object is installed between the skeletons 10 and 10 of a building and can follow the change in the gap between the skeletons 10 and 10. Cover plate 20 for closing the gap, and cover plate 2
A refractory zone 50 which is provided on the back side of 0 and which is provided in a gap between the frames 10 and 10 and has a fire-resistant zone 50 having a coating layer 40 which produces a foamed flame-retardant layer 30 when heated. To be achieved.

[0008]

In the present invention, the coating layer 40 formed on the fire-resistant zone 50 forms the foamed flame-retardant layer 30 upon heating and imparts the heat-insulating function and the fire-resistant function to the fire-resistant zone 50 itself. The foamed flame-retardant layer 30 is generated by heat or flame at the time of fire as a trigger to increase the volume, so that it can be applied in a thinner state as compared with a conventional refractory member.

The foamed flame-retardant layer 30 generated at the time of fire increases the volume by foaming to cover the joints between the refractory zones 50 and prevent the formation of gaps, and the flame from the joints of the refractory zones 50. Surely prevent such movement.

[0010]

1 and 2 show an expansion joint constructed for a floor. A holder member 80 made of aluminum, iron or the like is fixed to the floor skeletons 10 and 10 installed at a predetermined interval, and a spring clip 90 is provided in a clip mounting groove 81 provided at a side edge of the holder member 80. Is installed. The spring clip 90 is a piece-shaped member formed of a spring plate or the like, and holds the floating nut 92 in the upper curved portion 91.

Reference numeral 20 is a long plate-shaped cover plate placed on the upper surface of the holder member 80, and is connected to the spring clip 90 by a fastener 93 screwed to a floating nut 92. The cover plate 20 is placed on the holder member 80 so as to be movable in the lateral direction, to be precise, in the expansion and contraction direction of the space between the floor skeletons 10 and 10, and a gasket 82 made of synthetic rubber or the like is interposed in the movement region. To be done.

However, when the gap between the floor skeletons 10 expands or contracts due to an earthquake or the like, the spring clip 90 elastically deforms while holding the cover plate 20 and follows the dimensional change of the gap, and the skeleton 10 by the cover plate 20. 10,
The closed state of the gap between them is maintained.

A water stop plate 70 is installed on the back side of the cover plate 20 in the gap between the skeletons 10 and 10. The water blocking plate 70 formed of a sheet having a waterproof property includes a cover plate 20 and a holder member 80.
It is provided in order to prevent the water leaking from the boundary portion of the above from flowing into the gap between the skeletons 10, and the side edge is press-fitted into the water stop plate mounting groove 83 of the holder member 80 to be mounted.

Further, in order to prevent the movement of flames or the like from the gap between the skeletons 10 and 10, a fireproof zone 50 is provided between the skeletons 10.
Is erected. The refractory zone 50 is formed in a U-shaped cross section, and is fixed to the skeleton body 10 by the skeleton attachment members 60 fixed to both sides thereof. Refractory zone 50, and frame mounting member 6
As shown in FIG. 2, 0 is formed by forming a coating layer 40 that forms the foamed flame-retardant layer 30 on heating on the surface of a metal base 51, and a suitable connecting means such as a rivet 42 or a fastener. Are integrated by.

The coating layer 40 is formed by applying a viscous fluid coating material to the surface of the substrate 51 and then drying it. The application means is, for example, well-known coating such as brush coating, spraying, or dipping. It is determined in consideration of physical properties such as viscosity of the coating material. Further, when the coating layer 40 is porous or the coating material itself has poor water resistance, it is desirable to cover the coating layer 40 with a waterproof layer 41 having no water permeability as shown in FIG. .

As the coating material, a material that produces a flame-retardant foam under a predetermined temperature condition or flame-flame condition is used. For example, a mixed material of a carbide forming material, a foaming agent and a binder is used. It is possible to produce flame-retardant foamed carbide.

In this case, as the carbide-forming material, starch, dextrin, carbohydrates such as polysaccharides, polyfunctional alcohols such as monopentaerythritol, and resinous substances such as urea resin can be used. It is desirable to mix a reaction catalyst substance for promoting a carbonization of the carbide forming material by causing a dehydration reaction with the carbide forming material during combustion. As the reaction catalyst substance, a phosphoric acid-based compound such as ammonium phosphate can be used.

On the other hand, as the foaming agent, it is possible to use a material such as ammonium phosphate, melanin, urea or the like which releases a nonflammable gas such as ammonia by thermal decomposition. The binder is a binder for forming a coating film, and an aqueous system such as an acrylic resin emulsion such as polymethyl acrylate or polyethyl acrylate, or a solvent system such as an alkyd resin is used.

Therefore, in this embodiment, when a fire or the like occurs, the flame or heat of the fire forms flame-retardant carbides on the coating layer 40, and the foam material foams to a required thickness. A flame-retardant layer made of foamed carbide having a thickness is formed. The foamed flame-retardant layer 30 is shown in FIG.
As shown in (b), not only the thickness itself is increased to increase the heat insulating effect, but also the gap formed in the connecting portion of the fireproof zone 50 and the frame mounting member 60 is closed, and the gap from the gap is closed. The outflow of flames is prevented.

In this case, the fire resistant zone 50 and the frame mounting member 60
When the coating layer 40 is formed so as to cover the connecting portion with the, the connecting portion is reliably blocked by the foamed flame-retardant layer 30, and heat transfer to the rivet 42 and the like can be surely prevented. .

A modified example of the refractory zone 50 is shown in FIG. In this modification, the base 51 of the refractory zone 50 is made of a flexible material. As the base 51, woven or non-woven fabric of inorganic fibers such as rock wool, glass fibers, silica-alumina fibers, and silicon carbide fibers can be used. By forming the base body 51 from a flexible material, as shown in FIG. 3A, it is possible to freely bend the base body 51 in accordance with the size of the gap between the skeletons 10 and improve the work efficiency. And, moreover, body 1
It is possible to cope with the dimensional change of the gap between the skeletons 10 without applying stress to the connecting portion with 0.

The coating layer 40 is formed on the substrate 51 not only by forming a film on the surface layer of the substrate 51, but also when the substrate 51 is fibrous and has water absorption properties, as shown in FIG.
It is also possible to impregnate the substrate 51 with the coating material, as shown in FIG. The impregnation depth of the coating material is determined in consideration of the required thickness of the heat insulating layer due to foaming and the like, but when a thick heat insulating layer is required, it is possible to impregnate the entire substrate 51.

Further, when the base body 51 is too flexible and is not sufficient to maintain a certain shape, the strength or rigidity of the auxiliary material 52 is improved as shown in FIG. As the auxiliary material, a metal plate or the like is used, as shown in FIG.
As shown in FIG.
In addition, a net body formed of a metal material may be used as the auxiliary material 52 to cover the refractory zone 50 to prevent the mold from being deformed.

In the above embodiment, the refractory zone 5
0 is the frame 10 by the frame mounting member 60 fixed to both side edges.
However, it is also possible to directly fix the side edge of the fire-resistant zone 50 to the frame 10. In addition, refractory zone 5
When the base body 51 of 0 or the auxiliary material is formed of a metal plate material, as shown in FIG. 5, it is possible to bend the side edge of the refractory zone 50 to form a mounting portion to the skeleton 10. is there.

Although the present invention has been described by taking the expansion joint for floors as an example, the present invention is not limited to floor expansion joints, and all expansions installed between the frames of a building such as outer wall-outer wall, roof-roof, etc. Applicable to joints.

When the fireproof belt 50 or the coating layer 40 of the frame mounting member 60 has a desired waterproof property, the fireproof belt 50 or the like is also used as the water stop plate 70. It is also possible to abolish, and further, the structure around the fire resistant zone 50, such as installing a sound insulating plate if necessary,
It can be changed as appropriate.

[0027]

As is apparent from the above description, according to the present invention, the refractory zone is foamed and becomes thick only in the case of a fire or the like, and since it is thin at the time of construction, it can be easily handled and constructed. .

In addition, even if there is a gap at the joint between the refractory zones during a fire, the foamed flame-retardant layer will close the gap,
It is possible to reliably prevent the transmission of flames, smoke, etc. from the gap, improve the reliability, and eliminate the need for an extra step for accurately matching the seams, thus improving the construction efficiency. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

2A and 2B are views showing a refractory zone, in which FIG. 2A is a sectional view and FIG.
It is the BB sectional drawing of (a).

3A and 3B are views showing a modified example of the refractory zone, in which FIG. 3A is a sectional view showing the refractory zone formed of a flexible material, and FIG. 3B is a sectional view showing the refractory zone in which a base material is impregnated with a coating material. It is a figure.

FIG. 4 is a view showing another modified example of the refractory zone, (a) is a cross-sectional view showing a state in which an auxiliary material is inserted into the base body as a core material,
(B) is a sectional view using a net body as an auxiliary material,
(C) is a plan view of the net body.

FIG. 5 is a diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 10 Body 20 Cover Plate 30 Foam Flame Retardant Layer 40 Coating Layer 41 Waterproof Layer 50 Fireproof Zone 51 Base Body 60 Body Mounting Member 70 Water Stop Plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuyoshi Nara 1-16-15 Kanda, Chiyoda-ku, Tokyo Kyoritsu Chemical Industry Co., Ltd.

Claims (7)

[Claims] 1. A cover plate which is installed between the skeletons of a building and closes the gap so as to be able to follow changes in the gap between the skeletons, and a cover plate which is installed on the back side of the cover plate and between the skeletons, and which is heated. An expansion joint having a refractory zone with a coating layer that sometimes forms a foamed flame retardant layer. 2. The expansion joint according to claim 1, wherein the coating layer is formed on a flexible sheet-shaped substrate. 3. The expansion joint according to claim 1, wherein a metal frame mounting member having a coating layer for forming a foamed flame-retardant layer when heated is fixed to the refractory zone. 4. The expansion joint according to claim 3, wherein a coating layer that forms a foamed flame retardant when heated is formed at a joint portion between the frame mounting member and the fire resistant zone. 5. The expansion joint according to claim 1, wherein the coating layer is covered with a waterproof layer having no water permeability. 6. The expansion joint according to claim 1, wherein a water stop plate is stretched between the cover plate and the fire resistant zone. 7. The expansion joint according to claim 1, wherein a sound insulating plate is stretched between the cover plate and the fire resistant zone.