JP2006009428A - Fireproof joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the structure of a fireproof joint easy to prepare and capable of assuring the joint sufficient fire resistance even in the case of using a fireproof board with a high thermal shrinkage coefficient as a wall plate. <P>SOLUTION: A plurality of fireproof boards 6 with a high thermal shrinkage coefficient are arranged flush adjacent to one another, and a fireproof joint 10 is provided between the end faces of two fireproof boards. This fireproof joint 10 has a joint joiner 12 arranged to cover the joint 8 from its surface and a thermal-expansion fireproof strip 16 is inserted into a gap within the joint 8, supported by the joint joiner 12. When a fire breaks out, this thermal-expansion fireproof strip component 16 expands by heat and comes into a close contact with the end faces of adjacent fireproof boards 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fireproof joint structure provided at a joint between end faces of a fireproof board when a plurality of fireproof boards are arranged adjacent to each other, and more particularly to a fireproof joint structure suitable for a fireproof board having a large thermal shrinkage.

In recent years, fire resistance has been required for wall materials used for inner and outer walls of buildings. In connection with this, in addition to the watertightness conventionally required for the connection part (joint part) of fireproof wall materials, fire resistance is requested | required.
The fire resistance required for the joint portion is required to have a flame barrier property that does not allow the flame to enter the back surface of the fire wall material. From such a viewpoint, various methods for imparting fireproofing and fireproofing properties to the connecting portion to the fireproof wall material have been proposed. For example, Patent Document 1 proposes a fireproof sealing material (sealant) in which a carbonized layer film formed by foaming by heating exhibits a large volume expansion and can suppress the intrusion of a flame. Injected or applied to joints.
JP-A-8-81674

However, when the fireproof sealing material is injected or applied to the joint, skill is required for the injection or application work, and a lot of construction time is consumed.
In addition, if a fireproof board with large heat shrinkage is used as a fireproof wall material, the joint area expands due to shrinkage of the fireproof board in the event of a fire, the fireproof sealing material falls off from the joint section, and the flame shielding effect becomes insufficient, There is a risk that the flame that has passed through the joint will enter the back of the fireproof board.
The present invention has been made in view of the above circumstances, and it is possible to sufficiently ensure the fire resistance of the joint even when a fire-resistant board having a large thermal contraction is used as the wall material, and the fire-resistant joint that is easy to construct. The purpose is to provide a structure.

    In order to solve the above-mentioned problems, the fireproof joint structure according to the present invention is a fireproof joint structure in which a plurality of fireproof boards having large heat shrinkage are arranged adjacent to each other and provided at joints between end faces of the fireproof boards. A joint joiner disposed along the joint so as to cover the joint from the surface direction, and a belt-like thermally expandable fireproof member inserted with a gap in the joint while being held by the joint joiner. The heat-expandable fire-resistant member has a fire-resistant joint structure that is in surface contact with the end faces of the fire-resistant boards facing each other by expanding the volume at the time of a fire.

According to the fireproof joint structure according to the present invention, when the fireproof joint structure is constructed, it is only necessary to insert the thermally expandable fireproof member held by the jointer with a gap in the joint part. Therefore, it is possible to significantly reduce the construction time.
Also, in the event of a fire, the thermally expandable refractory member arranged in the joint part expands by increasing the volume and comes into surface contact with the end faces of the adjacent fireproof boards forming the joint part, so that the flame is in the joint part. Piercing through is blocked.
Furthermore, since the heat-expandable fireproof member is held by the jointer disposed along the joint portion, even if the fireproof board having large heat shrinkage contracts due to a fire and the joint portion expands, the heat-expandable fireproof member The flame shielding effect can be sufficiently performed without falling off the joint.

Hereinafter, an embodiment of a fireproof joint structure according to the present invention will be described with reference to the drawings.
FIG. 1 is a view showing an outer wall 2 according to the present invention from the inside, and FIG. 2 is a view taken along the line II-II in FIG.
As shown in FIG. 1, an outer wall 2 is provided by supporting a plurality of fireproof boards 6 arranged adjacent to each other so as to be flush with each other by a trunk edge 4 extending in the horizontal direction. And as shown in FIG. 2, the fireproof joint part 10 of 1st Embodiment is provided in the vertical joint 8 between the end surfaces of adjacent fireproof boards 6. As shown in FIG.

  As shown in FIG. 3, the fireproof joint 10 according to the first embodiment includes a joint joiner 12 disposed so as to cover the opening on the back side leading to the longitudinal joint 8, and the vertical joint 8 while being held by the joint joiner 12. And a thermally expandable refractory member 16 inserted with a gap therebetween. In addition, the opening part of the front side leading to the vertical joint 8 is filled with a waterproof sealing material 18 that maintains watertightness.

  The heat-expandable refractory member 16 is a band-shaped member formed by extruding a heat-expandable refractory material, and is a member whose volume significantly expands in a fire (expansion in the thickness direction is three times or more). The material composition of the heat-expandable refractory member 16 is 50% by mass of inorganic fibers, 5% of organic fibers, 15% of expanded graphite, 15% of rubber binder, and 15% of additives such as flame retardants. . More specifically, a resin composition containing butyl rubber and thermally expandable graphite, a resin composition containing chloroprene rubber and vermiculite, a resin composition containing polyurethane resin and thermally expandable graphite. A material composed of a material, a thermoplastic resin and / or a rubber substance, or an epoxy resin, and an inorganic filler containing a layered inorganic material that expands when heated can be considered.

Further, the joint joiner 12 is made of a metal or a flame retardant resin material, and as shown in FIG. 3, the side edge of the back side of the fireproof boards 6 and 6 straddling the opening of the vertical joint 8. And a pair of holding plates 12b and 12c that are integrally formed with the flange plate 12a and extend parallel to each other toward the vertical joint 8.
Here, the pair of holding plates 12b and 12c sandwich and hold the end portion in the width direction of the thermally expandable fireproof member 16. Specifically, the pair of holding plates 12b and 12c sandwich the portion from the end in the width direction to about １ ／ the length of the heat-expandable fireproof member 16 in the width direction.

Moreover, the fireproof board 6 is comprised from the nonflammable material or the semi-incombustible material, for example, the wood type cement board as described in JISA5404 is used. Here, the wood-based cement board is a building material having a large heat shrinkage.
According to the present embodiment, the pair of holding plates 12b and 12c of the joint joiner 12 hold the belt-like thermally expandable fire-resistant member 16, and the fire-resistant boards 6 and 6 straddle the flange 12a of the joint joiner 12 across the vertical joint 8. The heat-expandable refractory member 16 is inserted into the vertical joint 8 with a gap just by abutting the side edge of the rear side, so that the placement work of the heat-expandable refractory member 16 in the vertical joint 8 is skilled. This can be done easily with a short construction.

  In the event of a fire, as shown in FIG. 4, the fireproof board (woody cement board) 6 contracts in the direction of the arrow in the direction of the arrow due to the heat of the flame, and the vertical joints 8 expand (the adjacent fireproof boards 6 arranged). , 6 increases the distance between the end faces). Thus, even if the vertical joint 8 is enlarged, the thermally expandable refractory member 16 is sandwiched between the pair of holding plates 12b and 12c of the joint joiner 12, so that the thermally expandable refractory member 16 falls off from the vertical joint 8. Can be prevented.

  And even if a flame tries to enter the inside of the outer wall 2 from the vertical joint 8, as shown in FIG. 4, the thermally expandable refractory member 16 expands due to the heat of the flame and comes into surface contact with the end face of the fireproof board 6. It becomes a state. As described above, the thermally expandable refractory member 16 expands at the enlarged vertical joint 8, so that the flame is blocked from entering the inside of the outer wall 2 from the vertical joint 8, and the refractory joint portion 10 having an improved flame shielding effect. Can be provided. In addition, the flame does not enter the inside of the outer wall 2 and the expansion of the heat-expandable refractory member 16 suppresses the propagation of heat passing through the vertical joint 8, thereby suppressing the temperature rise on the back surface of the refractory board 6. can do.

Here, instead of the above-described structure in which the pair of holding plates 12b and 12c of the joint joiner 12 sandwich the first thermally expandable refractory member 16, as shown in FIG. 5, from the outside of the pair of holding plates 12b and 12c. There is also a structure in which convex portions 12d and 12e that enter the thermally expandable refractory member 16 are formed inside the pair of holding plates 12b and 12c by applying a local impact force inward.
In the case of this structure, the convex portions 12d and 12e formed on the pair of holding plates 12b and 12c securely hold the heat-expandable fireproof member 16, so that the heat-expandable fireproof member 16 from the vertical joint 8 at the time of a fire. It can be prevented from falling off.
In the present embodiment, since the pair of holding plates 12b and 12c sandwich the portion from the end in the width direction to approximately 1/3 with respect to the length in the width direction of the thermally expandable refractory member 16, The holding plates 12b and 12c do not affect the volume expansion operation of the expandable refractory member 16.

Next, what is shown in FIG.6 and FIG.7 is a figure which shows the fireproof joint part 20 of 2nd Embodiment which concerns on this invention. The same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted.
As shown in FIG. 6, the fireproof joint 20 of the present embodiment includes a pair of thermally expandable fireproof members 16 integrated on both surfaces of a jointer 22 having an H-shaped cross section and a web plate 22 a of the jointer 22. And.

The joint joiner 22 is made of a metal or a flame retardant resin material and spans the opening of the vertical joint 8 and is in contact with the front side edge of the fireproof boards 6 and 6. And the flange plate 22c straddling the opening of the vertical joint 8 and in contact with the side edge of the back side of the fireproof boards 6 and 6, and the flange plates 22b and 22c are connected to pass through the vertical joint 8 joint. Web plate 22a.
The pair of heat-expandable fireproof members 16 are bonded to both surfaces of the web plate 22a and face the end surfaces of the adjacent fireproof boards 6.

  According to the present embodiment, the pair of thermally expandable refractory members 16 are held by bonding on both surfaces of the web plate 22a of the joint joiner 22, and only the joint joiner is interposed when the fireproof boards 6 are sequentially arranged adjacent to each other. Since the heat-expandable refractory member 16 is disposed in the vertical joint 8, the placement work of the heat-expandable refractory member 16 in the vertical joint 8 can be easily performed in a short time without requiring skill. it can.

  In the event of a fire, as shown in FIG. 7, the fireproof board (woody cement board) 6 contracts in the direction of the arrow in the direction of the arrow due to the heat of the flame, and the vertical joints 8 expand (the adjacent fireproof boards 6 arranged). However, since the pair of thermally expandable refractory members 16 are surrounded by the flange plates 22b and 22c of the joint joiner 22 and the end face of the refractory board 6, the vertical joint 8 It is possible to prevent the pair of thermally expandable refractory members 16 from dropping from the inside.

  And even if the flame that has entered the gap between the flange plate 22b and the side surface of the refractory board 6 attempts to enter the inside of the outer wall 2 from the vertical joint 8, as shown in FIG. The refractory member 16 expands and comes into surface contact with both surfaces of the web plate 22 a and the end surface of the refractory board 6. In this way, the pair of heat-expandable refractory members 16 expands at the enlarged vertical joint 8 so that the flame is blocked from entering the inner side of the outer wall 2 from the vertical joint 8, and the fire-resistant joint with improved flame shielding effect. Part 20 can be provided.

Next, what is shown in FIG.8 and FIG.9 is a figure which shows the fireproof joint part 30 of 3rd Embodiment which concerns on this invention.
As shown in FIG. 6, the fireproof joint portion 30 of the present embodiment includes a hat-type joint joiner 32 in which a hat portion 32a enters the vertical joint 8, and a thermally expandable fireproof joint integrated with the hat portion 32a. Member 16.

The joint joiner 32 is made of a metal or a resin material having flame retardancy, and the side plate 32b that is in contact with the side edge on the back side of one of the adjacent fireproof boards 6 and the other fireproof board 6 is a flange 32c that is in contact with the side edge of the back side of the 6; a hat portion 32a that is formed continuously from these flange plates 32b, 32c; and a sharp locking portion that protrudes from the top of the hat portion 32a. 32d.
And the thermally expansible fireproof member 16 is integrated with the hat part 32a because the sharp latching | locking part 32d is pushed in and it penetrates into the inside.

  According to the present embodiment, the thermally expandable refractory member 16 is integrally held by the hat portion 32a of the joint joiner 32 via the locking portion 32a, and the hat portion 32a of the joint joiner 32 is placed in the vertical joint 8. Therefore, since the heat-expandable fire-resistant member 16 is inserted in the vertical joint 8 with a gap, the work for arranging the heat-expandable fire-resistant member 16 in the vertical joint 8 can be performed in a short time without requiring skill. Easy to do.

  In the event of a fire, as shown in FIG. 9, the fireproof board (woody cement board) 6 contracts in the direction of the arrow in the direction of the arrow due to the heat of the flame, and the vertical joints 8 expand (the adjacent fireproof boards 6 arranged). However, since the heat-expandable refractory member 16 is fixed to the hat portion 32a of the joint joiner 32, the heat-expandable refractory member 16 falls out of the vertical joint 8. Can be prevented.

And even if a flame tries to enter the inside of the outer wall 2 from the vertical joint 8, as shown in FIG. 9, the thermally expandable refractory member 16 expands due to the heat of the flame and comes into surface contact with the end face of the fireproof board 6. It becomes a state. As described above, the thermal expansion refractory member 16 expands at the enlarged vertical joint 8, so that the flame is blocked from entering the inside of the outer wall 2 from the vertical joint 8, and the fire-resistant joint portion 30 with improved flame shielding effect. Can be provided. In addition, the flame does not enter the inside of the outer wall 2 and the expansion of the heat-expandable refractory member 16 suppresses the propagation of heat passing through the vertical joint 8, thereby suppressing the temperature rise on the back surface of the refractory board 6. can do.
In addition, in each embodiment mentioned above, although the fireproof joint structure is employ | adopted with respect to the vertical joint 8, even if it performs the same fireproof joint structure with respect to a horizontal joint, there can exist the same effect.

It is the figure which showed the outer wall which concerns on this invention from the inner side. It is the II-II arrow directional view of FIG. It is a figure which shows the fireproof joint structure of 1st Embodiment which concerns on this invention. It is a figure which shows shrinkage | contraction of the fireproof board at the time of a fire in the fireproof joint structure of 1st Embodiment, and expansion of a thermally expansible fireproof member. It is a figure which shows the modification of the structure holding the thermally expansible fireproof member in the fireproof joint structure of 1st Embodiment. It is a figure which shows the fireproof joint structure of 2nd Embodiment which concerns on this invention. It is a figure which shows shrinkage | contraction of the fireproof board at the time of a fire in the fireproof joint structure of 2nd Embodiment, and expansion | swelling of a thermally expansible fireproof member. It is a figure which shows the fireproof joint structure of 3rd Embodiment which concerns on this invention. It is a figure which shows shrinkage | contraction of the fireproof board at the time of a fire in the fireproof joint structure of 3rd Embodiment, and expansion | swelling of a thermally expansible fireproof member.

Explanation of symbols

2 Outer wall 6 Fireproof board 8 Vertical joint 10, 20, 30 Fireproof joint 12, 22, 32 Jointer 12a, 22b, 22c Flange plate 12b, 12c Holding plate 12d, 12e Convex part 16 Thermal expansion fireproof member 22a Web plate 32a
32b, 32c Gutter plate 32d Locking part

Claims (6)

A fireproof joint structure in which a plurality of fireproof boards with large thermal shrinkage are arranged adjacent to each other and provided at joints between end faces of the fireproof boards,
A joint joiner disposed along the joint part so as to cover the joint part from the surface direction, and a belt-like thermally expandable fireproof member inserted with a gap in the joint part while being held by the jointer, The heat-expandable fire-resistant member is in contact with the end faces of the fire-resistant boards facing each other by expanding the volume at the time of a fire and expanding.   The joint joiner includes a flange plate that is in contact with one side edge of the fireproof boards so as to cover one of the front and back openings that open in the surface direction and communicate with the joint, and the flange plate And a pair of holding plates extending in parallel with each other toward the joint, and the pair of holding plates sandwich and hold a part of the thermally expandable fireproof member The fireproof joint structure according to claim 1.   The jointer is a flange plate that is in contact with one side edge of the fireproof boards so as to cover one of the front side and the back side opening that opens in the surface direction and communicates with the joint, and the flange plate A pair of holding plates that are integrally formed and extend in parallel with each other toward the joint portion, and the pair of holding plates have a plurality of members facing the thermally expandable fireproof member disposed between the holding plates. The fireproof joint structure according to claim 1, wherein a part of the thermally expandable fireproof member is held by providing a convex portion.   The pair of holding plates holds a portion from an end in the width direction to approximately 1/3 of the length in the width direction of the thermally expandable fireproof member. 3. Fireproof joint structure   The joint joiner has a pair of flange plates that are in contact with one and the other side edges of the fireproof boards so as to cover both the front and back openings that open in the surface direction and communicate with the joint. , A member having a H-shaped cross-section provided with a web plate connected to the pair of flange plates and passing through the joint portion, and one side of the web plate and the back side of the one side of the web plate The fire-resistant joint structure according to claim 1, wherein the thermally expandable fire-resistant member facing the end face of the fire-resistant board is joined to a surface.   The jointer is a hat-type joiner that is open in the surface direction and communicates with the joint part from one of the front side and back side opening parts into the joint part, and an upper part of the hat-type joiner 2. A fireproof joint structure according to claim 1, wherein a sharp engaging portion is provided on the heat-expandable fireproof member, and the heat-expandable fireproof member is held by pushing the engaging portion into the heat-expandable fireproof member.

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