JP6903257B2 - Fireproof panel connection structure - Google Patents

Description

The present invention relates to a connecting structure of refractory panels.

Generally, a fireproof structure is required for the partition wall of a fireproof building. In the case of a partition type partition wall, a non-combustible material such as a calcium silicate board or a rock wool board is often used as the core material of the fire resistant partition wall (hereinafter, may be referred to as a fire resistant partition wall). Further, as the decorative material covering the core material, a steel plate is often used for the purpose of imparting strength as a wall material. As a method of fixing the steel plate to the core material, it is often the case that the end portion of the steel plate is bent and the entire surface is adhered to both sides of the core material with an adhesive.

As the refractory partition wall, one in which a plurality of refractory panels are connected is used. Examples of the method of connecting the refractory panels include a method of connecting with a sane material, a method of applying uneven processing to the edges and fitting them. In a partition wall connected by these methods or the like, a gap is likely to occur in the connecting portion of the refractory panel due to the influence of deformation of the steel plate (so-called heat elongation) due to heat at high temperature, and flame or heat is generated from the gap. There is a risk of leakage and spread of fire, and the connecting part tends to be a weak point in terms of fire resistance. Further, when the core material itself is deformed by the heat at a high temperature, the sane material connecting the refractory panels is disconnected from the connecting portion, or the uneven processing portion of the refractory panels is released from fitting, and the refractory panel collapses. Or, there is a risk that the fireproof partition wall will collapse. Furthermore, if the steel plate is processed into a box shape so as to wrap the entire core material, the heat on the heating side in the event of a fire is transferred to the steel plate on the panel edge side as a thermal bridge, so the temperature of the panel joint tends to rise. There is a risk.

In order to deal with the above situation, a structure has been developed that can surely prevent flames and heat from leaking from the fire side to the non-fire side. For example, Patent Document 1 discloses a connecting portion structure of a fireproof panel (hereinafter, may be simply referred to as a connecting portion structure) formed by filling a core material having a fireproof heat insulating property between two metal surface plates. ing. In the connecting portion structure described in Patent Document 1, a concave groove parallel to the surface plate is formed on the connecting side end surface of the core material of the adjacent refractory panel. A calcium silicate plate is fitted in the groove so as to be parallel to the surface plate, and a laminated portion is provided on the surface plates of adjacent refractory panels so as to overlap each other in the panel thickness direction. Further, the two surface plates are bent along the connecting side end face so as not to reach the concave groove, and the calcium silicate plate is fitted in a state of being in direct contact with the concave groove, while being adjacent to each other. The end faces of the fireproof panels on the connecting side are separated from each other, and a gap is formed between the facing surfaces. The above-mentioned surface plate is bent toward the concave groove side along the connecting end face, but is bent toward the connecting end face of the adjacent fireproof panel before reaching the concave groove to form a protruding side. The protruding sides of the adjacent fireproof panels are laminated in the panel thickness direction with a gap from the calcium silicate plate, and the length of the laminated portion does not reach the calcium silicate plate. It is fastened using the screw of.

Japanese Patent No. 5721383

However, in the connecting portion structure described in Patent Document 1, since a rock wool board having not so high fire resistance is used as the core material, the thickness of the panel required to ensure the fire resistance is increased. The density of the rock wool board used as the core material is relatively light among the non-combustible materials, but as mentioned above, the thickness is increased, so that the weight of the fireproof panel is inevitably increased. Further, the thickness of the calcium silicate plate used for the sane material is thicker than the thickness of a general steel plate, and the thickness of the refractory panel is inevitably even thicker. Under such circumstances, the connecting portion structure described in Patent Document 1 has a problem that the weight of the refractory panel becomes heavy. Therefore, at the construction site of the refractory partition wall, there is no choice but to use lifting equipment, which may require man-hours and labor.
Further, in the connecting portion structure described in Patent Document 1, the surface plate (decorative material) is thermally expanded and deformed by the heat from the fire side, so that between the core material and the surface plate of the fire resistant panel on the fire side. There was a problem that a gap was created as a path for the flame.

The present invention has been made in view of the above circumstances, and is a refractory panel capable of reducing the weight of the refractory panel, maintaining the connection between the refractory panels more firmly, and suppressing the spread of fire to the non-fire side. Provide a connecting structure (partition wall).

The connection structure of the fireproof panel according to claim 1 is a connection structure of a fireproof panel in which a plurality of fireproof panels are connected, and the fireproof panel includes a plate-shaped core material containing calcium silicate and a side surface of the core material. Steel having a concave groove formed in, a concave groove fitting portion to be fitted to the concave groove, and an extension portion extending along the side surface of the core material from both ends of the concave groove fitting portion. A steel member is provided, and a steel plate that covers a part of the surface and side surfaces of the core material and is connected to the steel member by a fastener material, and a steel sane material is fitted into the recessed groove fitting portion. It is characterized by being matched.

According to the above configuration, the weight of the fireproof panel can be reduced by using a core material containing calcium silicate, which has high fire resistance and is lightweight.
In addition, since the fireproof panel is provided with a steel member, the span of deformation due to thermal elongation of the steel plate on the surface of the fireproof panel on the fire side is reduced at the initial stage of the fire, and the steel member and the sane material are fitted together. Since the state is maintained, the connection between the fireproof panels is more firmly maintained.
Furthermore, since the steel member and the steel plate are connected by a fastener on the side surface of the fireproof panel, the steel member is interlocked with the steel plate and pulled toward the fire side in the latter stage of the fire, and the shape of the steel member is changed. It changes, and the vicinity of the bottom of the concave groove fitting portion of the steel member tightens both ends of the sane material. As a result, the sane material is hard to come off from the recessed groove fitting portion, and the fitted state between the steel member and the sane material is maintained, so that the connection between the refractory panels is more firmly maintained.

The connection structure of the refractory panel of claim 2, wherein, prior Symbol steel member is provided with a plurality on a side surface of the core material, the height of the steel member may be met 30mm from 10 mm.
Further, in the above-mentioned connection structure of the fireproof panel, the core material is composed of a 0.2 TK calcium silicate plate in JIS A 5430, and the bulk density of the calcium silicate plate is 0.15 g / cm ³ to 0.35 g / cm. ^It may be 3.
In the above-mentioned connection structure of the refractory panel, the width of the concave groove is substantially constant in the depth direction when viewed in a plan view, and the sane material may be formed in a plate shape.

According to the above configuration, the height dimension of the steel member is suppressed to a degree that is easy to handle at the time of construction, and a plurality of such steel members are provided on the side surface of the core material at intervals from each other. As a result, it is not necessary to handle a long steel member that extends over the entire height of the side surface of the core material, and the fitted state between the steel member and the sane material is maintained. Therefore, the connection between the refractory panels is well maintained.

According to the connection structure of the refractory panels of the present invention, the weight of the refractory panels can be reduced and the connection between the refractory panels can be maintained more firmly.

It is a front view which shows the connection structure of the refractory panel of one Embodiment to which this invention was applied. It is a figure which shows the connection structure of the refractory panel of one Embodiment to which this invention was applied, and is the cross-sectional view seen by the arrow AA shown in FIG. It is a figure which shows the connection structure of the refractory panel of one Embodiment to which this invention was applied, and is the cross-sectional view seen by the arrow BB shown in FIG. It is a perspective view which shows the steel member of the connection structure of the refractory panel of one Embodiment to which this invention was applied. It is a perspective view for demonstrating the construction method of the connection structure of the refractory panel of one Embodiment to which this invention was applied. It is a figure for demonstrating the state in the initial stage of a fire of the connection structure of the refractory panel of one Embodiment to which this invention was applied, and is the cross-sectional view corresponding to the case where it is seen by the arrow BB shown in FIG. It is a figure for demonstrating the state in the initial stage of a fire of the connection structure of the refractory panel of one Embodiment to which this invention was applied, and is the cross-sectional view corresponding to the case where it is seen by the arrow AA shown in FIG. It is a figure for demonstrating the state in the late stage of a fire of the connection structure of the refractory panel of one Embodiment to which this invention was applied, and is the cross-sectional view corresponding to the case where it is seen by the arrow BB shown in FIG. It is a figure for demonstrating the state in the late stage of a fire of the connection structure of the refractory panel of one Embodiment to which this invention was applied, and is the cross-sectional view corresponding to the case where it is seen by the arrow AA shown in FIG. It is a back view which shows the temperature measurement position when seen from the non-heated side in the test body used in an Example. It is a figure which shows the structure of the panel used in an Example, (a) is a front view, and (b) is a side view. It is a rear view which shows the temperature measurement position in the panel used in an Example. It is a graph which shows the temperature rise value of each temperature measurement position in the test body used in an Example. It is a graph which shows the average value of each temperature rise value of the temperature measurement position in the test body used in an Example. It is a graph which shows the elapsed time dependence of the rise temperature from the measurement position a to the measurement position g in the panel used in an Example. It is a graph which shows the elapsed time dependence of the rise temperature from the measurement position h to the measurement position n in the panel used in an Example. It is a graph which shows the elapsed time dependence of the rise temperature from the measurement position o to the measurement position u in the panel used in an Example.

Hereinafter, an embodiment of a refractory panel connecting structure to which the present invention is applied (hereinafter, may be a refractory panel connecting structure of the present embodiment) will be described with reference to the drawings. The drawings used in the following description are schematic, and the length, width, thickness ratio, etc. are not always the same as the actual ones and can be changed as appropriate.

First, the connection structure 20 of the refractory panel of the present embodiment will be described.
As shown in FIG. 1, the reinforcing structure 20 of the fireproof panel of the present embodiment is a fireproof partition wall provided in a fireproof building (not shown), and a plurality of fireproof panels 2 are formed by a sane material 28 described later. It is formed by connecting the fireproof panels 2 in the width direction. In addition, in FIG. 1, detailed illustration of the connecting portion between the sane material 28 and the refractory panel 2 is omitted.

The fireproof panel 2 is fitted and supported by a ceiling rail 4 provided on the ceiling and a floor rail 6 provided on the floor. Of the plurality of fireproof panels 2, the fireproof panels 2 and 2 arranged on both sides in the width direction are fitted and supported by wall rails (not shown) provided on a wall surface (not shown) in addition to the ceiling rail 4 and the floor rail 6. Has been done.

In the present embodiment, as shown in FIGS. 2 and 3, a plurality of refractory panels 2 are arranged in two rows so as to abut each other in the thickness direction of the refractory panels 2, and the refractory panels 2 in each row are connected to each other. The position of the portion is deviated in the width direction of the refractory panel 2. That is, the plurality of refractory panels 2 have a two-layer staggered arrangement. With such a configuration, even if there is a gap in one row of refractory panels 2 that serves as a path for flames, the spread of fire to the other row of refractory panels 2 can be suppressed.

As shown in FIG. 3, the ceiling rail 4 for supporting a plurality of refractory panels 2 configured in a two-layer staggered arrangement has a shape bent at a substantially right angle, and is attached to the ceiling wall surface 44 by screws 35. It is composed of a fixed mounting bracket 34. Similarly, the floor rail 6 has a shape bent at a substantially right angle, and is composed of a mounting bracket 36 fixed to the floor surface 46 by a screw 37.
The method of attaching the fireproof panel 2 to each rail and the structures of the ceiling rail 4, the floor rail 6, and the wall rail are such that the fireproof panel 2 is fitted in the fireproof panel 2 in the width direction at the time of construction of the connection structure 20 of the fireproof panel. It is preferable that it can be slid and fixed at the installation position with screws or the like, but it is not particularly limited.

As shown in FIG. 2, the fireproof panel 2 has a core material 5, a concave groove 7 formed on a side surface 5d of the core material 5, and a concave groove fitting portion 8 and a concave groove fitting that fit into the concave groove 7. A steel member 12 having an extension portion 10 extending along the side surface 5d of the core material 5 from both end portions 8e and 8e of the portion 8, and a part of the surfaces 5a and 5b and the side surface 5d of the core material 5. It is provided with a steel plate 15 which covers the steel member 12 and is connected to the steel member 12.

The core material 5 is a plate-shaped member containing calcium silicate. As the plate-shaped member containing calcium silicate, a calcium silicate plate or an ALC plate can be used from the viewpoint of fire resistance and light weight, and a type 3 calcium silicate plate in JIS A 5430 is particularly preferable, and 0.2 TK among them. The calcium silicate plate represented by the abbreviation of is more preferable. In the present embodiment, the core material 5 is made of a lightweight calcium silicate plate (0.2 TK in JIS A 5430) having high fire resistance. The width of the core material 5 is about 300 mm to 600 mm, preferably 600 mm or less. If the width of the core material 5 is larger than 600 mm, the strain when the steel plate 15 is thermally stretched during a fire becomes large, so that it may be difficult to maintain the state in which the steel plate 15 is fixed by the steel member 12.

As shown in FIG. 4, the steel member 12 is a member obtained by bending a metal steel plate into a hat shape. As the steel member 12, for example, a hot-dip galvanized steel sheet (JIS G 3302), a hot-dip 55% aluminum-zinc alloy plated steel sheet (JIS G 3321), or the like is suitable. The thickness dimension T of the steel member 12 is preferably 0.27 mm or more and 0.3 mm or less. If the thickness dimension T of the steel member 12 is thicker than 0.3 mm, there will be a problem when fitting the steel member 12 into the groove 7. Further, when the thickness dimension T of the steel member 12 is thinner than 0.27 mm, the strain when the steel plate 15 is thermally stretched in the event of a fire becomes large, so that the state in which the steel plate 15 is fixed by the steel member 12 is maintained. May be difficult.

As shown in FIG. 2, the concave groove 7 is located substantially at the center of the core material 5 in the thickness direction on the side surface 5d of the core material 5, and is formed over the entire length of the core material 5 in the height direction.
The concave groove fitting portion 8 of the steel member 12 is formed according to the shape of the concave groove 7, and is in contact with the inner wall surface of the concave groove 7 at the time of fitting into the concave groove 7.

As shown in FIGS. 2 and 3, the extending portion 10 of the steel member 12 is connected to the concave groove fitting portion 8 and is lateral to the concave groove fitting portion 8 when viewed from the side surface 5d of the core material 5. It is formed so as to be folded back from the end portion 8e of the core member 5 along the side surface 5d, and extends to substantially the center of the connection portion between the end portion 8e and the surfaces 5a, 5b and the side surface 5d. The height dimension of the steel member 12 is preferably, for example, about 10 mm to 30 mm, and more preferably about 15 mm to 20 mm.
If the height dimension of the steel member 12 is shorter than 10 mm, it may be difficult to maintain the fixed state of the steel plate 15 in the event of a fire. Further, when the height dimension is longer than 30 mm, it is possible to keep the steel plate 15 fixed in the event of a fire, but the steel member 12 becomes a thermal bridge, and the fire resistance performance of the panel joint cannot be guaranteed. There is a risk.

As described above, a plurality of steel members 12 formed in a so-called hat shape are provided at predetermined intervals in the height direction of the core member 5. The distance between the steel members 12 is preferably, for example, about 300 mm to 600 mm, and more preferably about 450 mm. If the distance between the steel members 12 is narrower than 300 mm, the span of deformation due to thermal elongation of the steel plate in the early stage of the fire becomes smaller, and the mating state of the sane material in the latter stage of the fire is likely to be maintained. It becomes a thermal bridge, and there is a risk that the fire resistance performance of the panel joints cannot be guaranteed. Further, if the distance between the steel members 12 is wider than 600 mm, the span of deformation due to thermal elongation of the steel plate in the early stage of the fire becomes large, and the force for tightening both ends of the sane material in the late stage of the fire becomes weak, so that the mating state becomes It becomes difficult to sustain.

The steel plate 15 is composed of steel plates 15a and 15b formed so as to cover the surface 5a or the surface 5b of the core material 5. The steel plate 15 is formed so as to be folded back along the side surface 5d of the core material 5 from the side end portion of the surface 5a or the surface 5b of the core material 5, and is connected to the extending portion 10 of the steel member 12 by a fastener material. There is. Examples of the fastening material include blind rivets, screws, and the like, including spot welding, but the fastener material is not particularly limited as long as it can connect the steel member 12 and the steel plate 15. The steel plate 15, the core material 5, and the extending portion 10 of the steel member 12 are adhered to each other by a paint (not shown) such as an acrylic resin, a urethane resin, a vinyl acetate resin, or an epoxy resin.

Examples of the steel sheet 15 include a hot-dip 55% aluminum-zinc alloy plated steel sheet (JIS G 3321), a coated hot-dip 55% aluminum-zinc alloy-plated steel sheet (JIS G 3322), a hot-dip galvanized steel sheet (JIS G 3302), and a coated molten steel sheet. A galvanized steel sheet (JIS G 3312) or the like is suitable. The thickness dimension of the steel plate 15 is about 0.3 mm to 0.5 mm, preferably about 0.35 mm. The steel plate 15 may be made of a commonly used steel plate.
The thickness of the refractory panel 2 in which the steel plate 15 and the core material 5 are combined is set to about 26 mm from the viewpoint of enhancing the refractory resistance of the refractory panel 2, improving the workability, and surely reducing the weight.

As shown in FIG. 2, the recessed groove fitting portion 8 of the steel member 12 is fitted with a sane material 28 which is a member for connecting a plurality of refractory panels 2. The sane material 28 is a plate-shaped member formed so that at least both end portions 28e and 28e of the sane material 28 in the width direction can be accommodated in the recessed groove fitting portion 8 of the steel member 12. The sane material 28 is basically made of steel, and as the material of the sane material 28, the same material as the steel plate 15 can be exemplified. The width of the sane material 28 is preferably in the range of 26 mm to 37 mm. The thickness of the sane material 28 is about 1.6 mm to 3.6 mm, preferably about 2.3 mm.

Next, the construction method of the connecting structure 20 of the refractory panel of the present embodiment will be described.
First, a concave groove 7 is formed on the side surface 5d of the core material 5, and the concave groove fitting portion 8 of the steel member 12 is inserted into the concave groove 7 and temporarily fixed. A plurality of steel members 12 are temporarily fixed at predetermined intervals in the height direction of the core material 5.

Next, the steel plate 15 is brought into contact with the surfaces 5a, 5b and a part of the side surface 5d of the core material 5 and the extending portion 10 of the steel member 12 so as to cover these surfaces, and the above-mentioned paint such as an acrylic resin is applied. The core material 5 and the steel member 12 are brought into close contact with each other. The refractory panel 2 is completed by the steps up to this point.
The steps up to this point may be performed at the construction site, or may be performed in advance at a factory or the like before transporting various necessary members to the construction site, and the assembled fireproof panel 2 may be brought to the construction site.

Next, the fireproof panel 2 is fitted into the ceiling rail 4 and the floor rail 6 of the fireproof building and arranged at a predetermined position (for example, close to the wall side), and then the fireproof panel 2 adjacent to the fireproof panel 2 is arranged. To do. As shown in FIG. 5, one end 28e of the sane material 28 is fitted into the recessed groove fitting portion 8 of the steel member 12 of the refractory panel 2A among the adjacent refractory panels 2A and 2B. After that, the fireproof panel 2B is connected so that the concave groove fitting portion 8 of the steel member 12 is fitted to the other end portion 28e of the sane material 28 protruding from the fireproof panel 2A. In FIG. 5, for the sake of clarity, only the connection between the refractory panels 2 and 2 for one row is shown, but as described above, a plurality of refractory panels 2 can be arranged in a two-layer staggered arrangement. It may be composed of a plurality of layers of three or more layers.
The fireproof panel connecting structure 20 is completed by the above steps, and when the above steps are repeated according to the number of fireproof panels 2, the fireproof partition wall is completed.

As described above, according to the connection structure 20 of the refractory panel of the present embodiment, since the core material 5 contains calcium silicate and is specifically a calcium silicate plate, the refractory panel 2 is provided with excellent fire resistance. At the same time, the weight of the fireproof panel 2 can be reduced. Specifically, if the width dimension of one refractory panel 2 is 600 mm and the height dimension is 4000 mm, the weight of the refractory panel 2 can be reduced to about 35 kg at the maximum, which is about half that of the conventional refractory panel.
And since the construction can be carried out without using the lifting equipment, the construction cost can be reduced.

Further, according to the connection structure 20 of the refractory panel of the present embodiment, since the refractory panel 2 includes the steel member 12 and the steel plate 15, the steel plate 15 is made of steel at predetermined intervals in the height direction of the refractory panel 2. It is connected to the manufacturing member 12. Therefore, for example, at the initial stage of a fire, as shown in FIG. 6 , when the steel plate 15 on the surface of the fireproof panel 2 on the fire side is thermally stretched, the steel plate 15 at the portion fixed to the steel member 12 is on the fire side. By being attracted to the core material 5 side by the steel member 12 that has not received heat from the steel plate 15 on the surface of the fireproof panel 2, the span of deformation due to the thermal elongation of the steel plate 15 on the surface of the fireproof panel 2 on the fire side is increased. It becomes smaller. As a result, the risk of creating a gap that serves as a path for the flame can be reduced, and the spread of fire to the non-fire side can be suppressed. Further, as shown in FIG. 7 , since the steel member 12 is hardly deformed at the initial stage of the fire, the mating state between the steel member 12 and the sane material 28 is maintained, so that the fireproof panels 2 and 2 are connected to each other. Can be held more firmly. As a result, it is possible to prevent the connecting structure 20 of the fireproof panel and the fireproof partition wall using the connecting structure 20 from collapsing, and to suppress the spread of fire to the non-fire side.

Further, according to the connection structure 20 of the fireproof panel of the present embodiment, as described above, the steel plate 15 is connected to the steel member 12 at predetermined intervals in the height direction of the fireproof panel 2, so that, for example, the latter stage of the fire. Heat is transferred to the steel member 12, and the steel member 12 also heats up and interlocks with the steel plate 15. Therefore, as shown in FIGS. 8 and 9 , the shape of the steel member 12 changes, and the vicinity of the bottom of the recessed groove fitting portion 8 of the steel member 12 faces the center of the connecting portion between the adjacent fireproof panels 2 and 2. Both ends 28e and 28e of the sane material 28 are tightened in the direction (that is, the D12 direction shown in FIG. 8) and the direction in which the surfaces 5a and 5b of the core material 5 are pressed against each other (that is, the D5 direction shown in FIG. 8). By tightening in the D5 direction and the D12 direction in this way, the sane material 28 is hard to come off from the concave groove fitting portion 8 of the steel member 12, and the sane material 28 is supported so as to be self-supporting, and the steel member. Since the mating state between the 12 and the sane material 28 is maintained, the connection between the fireproof panels 2 and 2 can be more firmly maintained. As a result, even in the latter stage of the fire, it is possible to prevent the connecting structure 20 of the fireproof panel and the fireproof partition wall using the connecting structure 20 from collapsing, and to suppress the spread of the fire to the non-fire side.

Further, according to the connection structure 20 of the refractory panels of the present embodiment, since the lightweight refractory panels 2 are connected to each other via the refractory sane material 28, the sane material 28 is also formed in the gap between the connecting portions of the refractory panels 2. Is arranged, and the passage of flame and heat from the connecting portion can be suppressed. In addition, the connection structure 20 of the refractory panel and the refractory partition wall can be easily assembled, and the construction cost can be further reduced.

Further, the connecting structure 20 of the fireproof panel of the present embodiment uses the fireproof panel 2 which is light and thin as described above and has fire resistance, and can surely suppress the spread of fire to the non-fire side. Can be used for partition walls of facilities. Further, since the fire spread prevention property in the event of a fire can be maintained in the same manner as a general fire prevention section while ensuring the design, it is possible to provide a highly safe building.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various aspects of the present invention are described within the scope of the claims. It can be changed.

Further, the fireproof panel 2 is not limited to the ceiling rail 4 and the floor rail 6, and may be supported by beams or columns of a building. That is, a concave groove 7 is formed on the surface of the beam or column of the building facing the fireproof panel 2, a steel member 12 is fitted into the concave groove 7, and the fireproof panel 2 and the beam or column are connected by a sane material 28. You may be.

Further, the calcium silicate plate of the core material 5 may be provided with joints. When joints are provided, it is preferable to apply a fire-resistant adhesive to the butt joints from the viewpoint of preventing flames and heat from leaking from the fire side to the non-fire side through the joints.
A decorative sheet such as an olefin may be attached to the steel plate 15. Further, not only the steel sheet 15 is made of white, gray, or other monochromatic color steel sheet specifications, but also the above-mentioned resin film such as olefin or vinyl chloride is printed as a decorative finish of the steel sheet 15. By attaching the sheet to the surfaces 15a and 15b, the range of use of the steel sheet 15 including interior applications can be expanded as a panel with a design property.

Further, the side surface 5d of the core material 5 and the inner wall surface of the concave groove 7 may be embossed or roughened for the purpose of preventing the steel member 12 from coming off.
Further, the decorative sheet may be attached to both the front surface or the front surface and the back surface of the refractory panel 2, that is, both the front surface 15a or the front surface 15a and the back surface 15b of the steel plate 15. The decorative sheet used in this way preferably has a heat-shielding property.

Further, when connecting the refractory panels 2 and 2, a member capable of absorbing an impact may be attached to at least a part of the refractory panel 2. The partial portion indicates, for example, the side surface 2d of the refractory panel 2, but is not particularly limited, and is a portion that is easily damaged during connection. The member capable of absorbing shock (hereinafter, shock absorbing member) is a member having so-called cushioning property, and examples thereof include a sealing material, foamed synthetic rubber, styrofoam, and foamed resin (including refractory paint). The thickness of the shock absorbing member when attached to a part of the refractory panel 2 is preferably 100% to 200% of the width of the gap generated when the refractory panels 2 and 2 are connected to each other. With such a configuration, when the refractory panels 2 and 2 are connected to each other, it is possible to prevent the refractory panels 2 and 2 from being damaged by hitting each other.

Next, Examples and Comparative Examples performed to support the effect of the connecting structure of the refractory panel of one embodiment to which the present invention is applied will be described. The present invention is not limited to the following examples.

FIG. 10 shows the measurement position of the temperature when viewed from the non-heated side in the test piece of the large-scale refractory partition configured as shown in FIGS. 11A and 11B. In FIG. 10, unlike FIG. 11B, the height positions of the horizontal joints of the core material do not match.

Further, FIG. 13 shows changes in the temperature rise value at each measurement position including the cooling period when the test piece shown in FIG. 10 is heated for 1 hour. In FIG. 13, the maximum temperature rise value (that is, the upper limit value) of 180 ° C., which is the fire resistance standard, and the desirable maximum temperature rise value (that is, the upper limit value) of 162 ° C. are shown by solid lines and broken lines, respectively. ..
Further, FIG. 14 shows the average value of changes in the temperature rise value at each measurement position including the cooling period after heating described above with respect to the test body shown in FIG. In FIG. 14, the average temperature rise value of 140 ° C., which is the fire resistance standard, and the desirable average temperature rise value of 126 ° C. are shown by solid lines and broken lines, respectively.

As shown in FIGS. 13 and 14, the maximum temperature rise value in the test body to which the present invention is applied is about 150 ° C., which satisfies 162 ° C. or lower. In particular, it can be seen that the temperature of the surface portion, which occupies most of the partition, rises only up to about 80 ° C., and the fire spread prevention property is high. Further, the average temperature rise value in the test body to which the invention is applied is about 90 ° C., which also satisfies 126 ° C. or lower.

A groove is formed on the side surface of a calcium silicate plate (JIS A 5430 type 3, 0.2TK) having a thickness of 25 mm, and steel members having a height of 15 mm are fitted into the groove at intervals of 600 mm, and then the surface is formed. By preparing a panel with a steel plate bonded with urethane resin paint on the back surface and using a sane material, a plurality of panels are geometrically arranged as shown in FIGS. 11 (a) and 11 (b). Assembled a small fireproof partition. Each panel was provided with vertical joints and horizontal joints at predetermined positions indicated by broken lines in FIGS. 11 (a) and 11 (b). The numerical range in FIGS. 11A and 11 indicates that the dimensions of each member were within the numerical range in this embodiment. Further, the shaded portion shows a calcium silicate plate in a state where the steel plate is peeled off. Further, the alternate long and short dash line indicates the connection position between the panels by the sane material. As shown in FIG. 11B, the height positions of the horizontal joints of the core material are the same here.

Assuming that the surface side of the panel shown in FIG. 11A is the fire side, a heating test by standard heating (ISO834) was carried out. On the back surface side (non-fire side) of the panel shown in FIG. 11A, as shown in FIG. 12, a predetermined measurement from a predetermined measurement position a at the upper part in the height direction to a measurement position g and a predetermined measurement at the center portion in the height direction. The temperature was measured at a total of 21 positions from the position h to the measurement position n and from the predetermined measurement position o to the measurement position u at the lower part in the height direction. FIG. 15 shows the elapsed time dependence of the rising temperature from the measurement position a to the measurement position g. FIG. 16 shows the elapsed time dependence of the rising temperature from the measurement position h to the measurement position n. FIG. 17 shows the elapsed time dependence of the rising temperature from the measurement position o to the measurement position u.

The upper part of the panel in the height direction is the position where the highest temperature is expected. Looking at FIGS. 15 to 17, at the measurement position d at the upper part of the panel in the height direction (the portion where the heights of the horizontal joints of the core material match) and the center in the width direction, the elapsed time is about 60 minutes as a peak. Between 1 minute and about 110 minutes, the temperature rise was higher than the temperature at the measurement position c from the other measurement position a and from the measurement position e to the measurement position u, but it is expected that the temperature will be the highest as a whole. It can be seen that the rising temperature is generally suppressed even at the connecting portion (that is, the measurement position d, etc.) on the upper part of the panel on the non-heated side.

From the results of the standard heating test of the examples described above, it was confirmed that the connecting structure of the refractory panel to which the present invention is applied has sufficient fire resistance and fire spread prevention ability. This demonstrated the effectiveness of the proposed refractory panel connection structure.

2 Refractory panel 5 Core material 5a, 5b Surface 5d Side surface 7 Concave groove 8 Concave groove fitting part 8e Ends (both ends)
10 Extension 12 Steel member 15 Steel plate 20 Fireproof panel connection structure 28 Sane material

Claims (4)

It is a connection structure of fireproof panels in which multiple fireproof panels are connected.
The fireproof panel is
A plate-shaped core material containing calcium silicate and
The concave groove formed on the side surface of the core material and
A steel member having a concave groove fitting portion that fits into the concave groove and an extension portion that extends along the side surface of the core material from both ends of the concave groove fitting portion.
A steel plate that covers a part of the surface and side surfaces of the core material and is connected to the steel member by a fastening material.
With
A connection structure of a refractory panel, characterized in that a steel sane material is fitted in the recessed groove fitting portion. A plurality of the steel members are provided on the side surface of the core material .
Height of the steel member is Ru 30mm der from 10 mm,
The connection structure of the refractory panel according to claim 1. The core material is composed of a 0.2TK calcium silicate plate in JIS A 5430.
Bulk density of the calcium silicate board is 0.35 g / cm ³ from 0.15 g / cm ^3,
The connection structure of the refractory panel according to claim 1 or 2. When viewed in a plane
The width of the groove is substantially constant in the depth direction.
The sane material is formed in a plate shape,
The connection structure of the refractory panel according to any one of claims 1 to 3.

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