JP7268636B2 - Fire-resistant coated member, fire-resistant coated structure, method for manufacturing fire-resistant coated member - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fire-resistant coating member for coating the surface of a steel structure, a fire-resistant coating structure, and a method of manufacturing a fire-resistant coating member.

Fireproof performance is required for the main structural parts of buildings in order to prevent collapse and spread of fire due to fire, and fireproof coating is applied to steel structures because steel materials in steel structures may lose strength when heated to high temperatures and may collapse.
Noncombustible materials are used as fireproof coating materials, and there are a wide variety of types such as sprayed rock wool, reinforced gypsum board, and fireproof paint. Sprayed refractory coating is a refractory coating that is sprayed onto a steel structure on site, such as sprayed rockwool. Sprayed rock wool consists of rock wool granulated cotton as the main raw material, cement as a hardener, and water, and a mixture of these is sprayed on the steel frame structure on site with a special spray machine. This sprayed rock wool is very cheap and is often used.

The construction method, cost, and performance of fire-resistant coating differ depending on the materials used, but spray-on rock wool basically has the advantage that the raw material is cheap and that it is easy to apply because it is only sprayed. On the other hand, there is a need to cure the site, it takes time to wait until it hardens, etc., and there is a risk that the thickness of the fireproof coating layer will be uneven and it may not be possible to demonstrate sufficient fireproofness. The disadvantage is that it must be installed.

Fire-resistant coating with plate-like fire-resistant coating materials such as reinforced gypsum board and calcium silicate board takes less time than sprayed rock wool and the thickness of the coating can be easily controlled, but costs accordingly. The cost of the fireproof coating method using the calcium silicate plate is about twice that of the fireproof coating method using the rock wool spraying method and the fireproof coating method using the calcium silicate plate.

On the other hand, recently, the use of wood has been promoted due to the issue of CO ₂ emissions. In addition to being used as a structural material in buildings, wood is also used as a decorative material due to its excellent design. Although wood burns down in the event of a fire, it is carbonized and exhibits heat insulation performance, so it is expected to be used as both a decorative material and a fireproof coating material, but it is difficult to expect long-term fireproof performance.

As a specific example of a fireproof coating method, Patent Document 1 proposes a fireproof coating structure using unit members composed of a gypsum board, an insulating expansion sheet, and a metal plate.
In addition, Patent Document 2 proposes a fireproof covering structure in which the thickness of the fireproof covering can be made thinner than before in consideration of the heat insulating performance of the wooden material provided as a decorative material on the surface of the fireproof covering.

Japanese Patent Application Laid-Open No. 2000-170283 JP-A-2017-8640

The fireproof coating method of Patent Document 1 is easy to apply, but the rivet joints of the unit members protrude and become an obstacle when attaching the decorative material, and the thermal expansion sheet is expensive because the material cost is high. , and other problems.
Moreover, in Patent Document 2, although the thickness of the fireproof coating structure is changed, the structure is the same as the conventional structure, and therefore workability is not improved.
In this way, construction methods for improving workability as unit members and fireproof coating structures that take decorative materials into account have been proposed, but there are few that achieve both improved designability, improved workability, and cost reduction.

The present invention has been made to solve such problems, and provides a fire-resistant coated member, a fire-resistant coated structure, and a method for manufacturing a fire-resistant coated member that can achieve both improved designability, improved workability, and reduced costs. It is intended to

(1) The fireproof coating member according to the present invention includes a rectangular decorative plate, a rectangular plate-shaped fireproof coating material provided so as to cover the decorative plate, the rectangular plate-shaped fireproof coating material, and the decorative plate A first incombustible member provided between and a second incombustible member provided along at least two opposite sides of the plate-shaped sprayed fireproof coating material, wherein the first incombustible member and the second 2 incombustible members are joined together.

(2) In addition, in the above-described (1), the decorative board is made of wood material.

(3) In addition, in the above (1) or (2), the rectangular plate-shaped fireproof coating material is solidified into a rectangular plate shape by spraying rock wool. is.

(4) The fireproof covering structure according to the present invention includes a plurality of fireproof covering members according to any one of (1) to (3) above, so as to surround the structure to be covered, and the decorative plate are arranged so as to be arranged on the outer surface side, and are fixed around the structure.

(5) A method for manufacturing a fire-resistant coated member according to the present invention is the method for manufacturing a fire-resistant coated member according to (3) above,
placing the first incombustible member on the plate surface of the decorative plate;
arranging the second incombustible member along at least two sides of the decorative plate facing each other and protruding toward the surface of the decorative plate on which the first noncombustible member is arranged;
joining the first incombustible member and the second incombustible member;
and a rock wool spraying step of spraying a mixture of rock wool, solidifying material, and water onto the surface of the decorative board on which the first noncombustible member is arranged.

The fireproof coating member according to the present invention comprises a rectangular decorative board, a rectangular board-shaped fireproof coating material provided so as to cover the decorative board, and a fireproof coating material provided between the sprayed fireproof coating material and the decorative board. and a second noncombustible member provided along at least two sides facing each other of the plate-shaped sprayed fireproof coating material, wherein the first noncombustible member and the second noncombustible member The combination of design, cost, and workability is achieved by being joined.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the fireproof coating member which concerns on one embodiment of this invention, Fig.1 (a) is a top view, FIG.1(b) is a front view, FIG.1(c) is a right side view. 1. It is explanatory drawing of the manufacturing method of the fireproof coating member shown in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the fireproof covering structure which concerns on one embodiment of this invention (the 1). It is explanatory drawing of the fireproof covering structure which concerns on one embodiment of this invention (the 2). 5(a) is a plan view, FIG. 5(b) is a front view, and FIG. 5(c) is a right side view. FIG. There is (Part 1). 6(a) is a plan view, FIG. 6(b) is a front view, and FIG. 6(c) is a right side view. FIG. There is (Part 2).

As shown in FIG. 1, the fire-resistant coated member 1 according to one embodiment of the present invention includes a rectangular decorative board 3 and rock wool that is sprayed so as to cover the decorative board 3 and solidified into a rectangular plate shape. A first incombustible member 7 provided between the refractory coating material 5 and the decorative plate 3, and a second side provided along two sides of the refractory coating material 5 facing each other. The noncombustible member 9 is provided, and the first noncombustible member 7 and the second noncombustible member 9 are joined.
Each configuration will be described in detail below.

<Decorative board>
The decorative plate 3 is a rectangular plate material to which rock wool is sprayed, and has a function as a formwork. In addition, as will be described later, when covering an object to be covered with the fireproof covering member 1 , the decorative plate 3 is exposed on the outer surface side, so it has a function of improving the design of the fireproof covering member 1 .
The decorative board 3 having such a function preferably has a certain degree of heat insulation, and is preferably made of, for example, a wooden material. Wood materials include not only ordinary wooden boards, but also laminated materials such as CLT (Cross Laminated Timber), laminated lumber, plywood, and LVL (Laminated Veneer Lumber) made of veneers and sawn boards.

As described above, although wood materials burn in the event of a fire, they exhibit heat insulation performance when carbonized. Therefore, depending on the tree species and thickness, the thickness of the sprayed fireproof coating material 5 should be made thinner than the thickness when directly sprayed onto the coating target. However, it is thought that fire resistance performance equal to or higher than that of the conventional one can be exhibited.
In addition, the decorative board 3 according to the present invention is not limited to a wooden material, and for example, a decorative board made of a material other than the wooden material used as a building material can be used.

<Spraying fireproof coating material>
The spray fireproof covering material 5 is obtained by spraying rock wool so as to cover the decorative board 3 and solidifying it into a rectangular plate. More specifically, it is obtained by hardening a mixture of rock wool (granular rock wool cotton) as a raw material for sprayed rock wool, cement as an example of a solidifying agent, and water. Note that the solidifying material is not limited to cement, and any material that can solidify rock wool into a plate may be used.

The fireproof performance of the sprayed fireproof coating material 5 is greatly related to the thickness and density of the coating. At the site where the coating is directly sprayed onto the object to be coated, as in the conventional example, efforts are made to secure sufficient coating thickness and density, but it is difficult to manage. . In particular, when the object to be coated has a special shape such as a curved shape, it is even more difficult to control the thickness and density, and there is a risk that sufficient fire resistance cannot be obtained due to insufficient density and thickness.

In this regard, in the present embodiment, since it can be manufactured by spraying onto the flat surface of the decorative plate 3 and hardening, stable manufacturing is possible, and the density can be stably secured, and sufficient fire resistance can be exhibited.
If the thickness of the sprayed refractory coating material 5 is set to be equivalent to the thickness when directly spraying on a general object to be covered, sufficient fireproof performance can of course be exhibited. Sufficient fire resistance can be expected even if the thickness is thinner than in the case of spraying.

<First incombustible member>
The first incombustible member 7 is provided between the sprayed fireproof coating material 5 and the decorative board 3, and is a member for preventing the sprayed fireproof coating material 5 from falling off when the decorative board 3 is destroyed by fire. A thin planar member is desirable, and examples thereof include flat laths and thin steel plates. When a flat lath is used as the first noncombustible member 7, it is attached to the entire plate surface because of its light weight. In addition, the first noncombustible member 7 does not need to be an integral large-area member, and may be provided with a plurality of relatively small members. . For example, when a thin steel plate is used as the first noncombustible member 7, a plurality of thin steel plates having a relatively small area may be attached at intervals in order to reduce weight.

<Second incombustible member>
The second incombustible member 9 is provided along at least two sides of the sprayed fireproof coating material 5 facing each other, and functions as a joining member that joins adjacent fireproof coating members 1 when coating an object to be coated. It has a function as a formwork when spraying wool and a function of preventing the sprayed fireproof coating material 5 from coming off in cooperation with the first noncombustible member 7 . In order to exhibit such a function, the second noncombustible member 9 is desirably a member having a certain degree of rigidity, and in the example shown in FIG. 1, a thin steel plate is used.

The second incombustible member 9 made of a thin steel plate is arranged along both side surfaces of the rectangular decorative plate 3 so as to extend from the upper end to the lower end of the decorative plate 3 . As shown in the enlarged view of FIG. 1, the second noncombustible member 9 is previously bent by about 45 degrees to improve its rigidity, and is fixed to the side end surface of the decorative plate 3 with nails, screws, or the like. It is fixed by a tool 11.
In addition, the second incombustible member 9 formed of a thin steel plate is bent about 45 degrees to form an inclined surface portion 9a, so that when covering the object to be covered, the inclined surface portions 9a of the adjacent fireproof coating members 1 contact each other. By bringing them into contact with each other, they can be assembled at a substantially right angle (see FIGS. 3 and 4).

The second non-combustible member 9 is joined to the first non-combustible member 7, and thereby cooperates with the first non-combustible member 7 to prevent the sprayed fireproof covering material 5 from falling off when the decorative plate 3 is destroyed by fire. Play.
More specifically, the second noncombustible member 9 is joined to the adjacent fireproof coating member 1 and is also joined to the first noncombustible member 7, thereby enhancing the drop-off prevention function of the sprayed fireproof coating material 5. .

In addition, by projecting the second noncombustible member 9 to the side of the decorative board 3 on which the first noncombustible member 7 is provided, the second noncombustible member 9 can be used as a part of the formwork when rock wool is sprayed onto the decorative board 3. functions as a department.
As the second noncombustible member 9, a calcium silicate board, a reinforced gypsum board, or the like can be used in addition to the steel material. Modes of using a thick board such as a calcium silicate board and a reinforced gypsum board will be described later.

Next, a method for manufacturing the fireproof coated member 1 configured as described above will be described with reference to FIG.
First, the decorative board 3 is arranged horizontally (see FIG. 2(a)), and the first noncombustible member 7 is arranged on the upper surface of the decorative board 3 (see FIG. 2(b)).
Next, the second noncombustible members 9 are arranged on the opposite side surfaces of the decorative plate 3, and screwed to the decorative plate 3 (see FIG. 2(c)). At this time, the second incombustible member 9 is joined to the first incombustible member 7 . As a method for joining the second noncombustible member 9 and the first noncombustible member 7, for example, the side end portion of the second noncombustible member 9 is folded back along the decorative plate 3, overlapped with the first noncombustible member 7, and the overlapped portion may be screwed. Also, for example, a wire or the like may be used for connection, or other connection means according to the type of the first noncombustible member 7 may be used.
The second noncombustible member 9 and the first noncombustible member 7 may be joined in advance before joining the second noncombustible member 9 to the decorative plate 3 . By doing so, construction efficiency is further improved.

Next, rock wool is sprayed onto the plate surface of the decorative plate 3 on which the first noncombustible member 7 is arranged (see FIG. 2(d)). In order to exhibit sufficient fire resistance performance, it is necessary to mold to the required thickness with a certain degree of density. desirable. In this case, if the protrusion height from the plate surface of the second incombustible member 9 is set to a predetermined thickness after being pressed, thickness control during pressing becomes easy. Also, by recording the thickness when spraying a little more, that is, how much higher than the height of the second noncombustible member 9, the necessary thickness for obtaining the required density can be obtained empirically. Quality control of the spray-type fireproof coating material is facilitated.

The order of installing the first noncombustible member 7 on the decorative board 3, installing the second noncombustible member 9 onto the decorative board 3, and joining the first noncombustible member 7 and the second noncombustible member 9 is not particularly limited. Instead, as described above, the installation of the first noncombustible member 7, the installation of the second noncombustible member 9, and the joining of the first noncombustible member 7 and the second noncombustible member 9 may be performed in that order. Installation, installation of the first noncombustible member 7, joining of the first noncombustible member 7 and the second noncombustible member 9 may be performed in that order, or the first noncombustible member 7 and the second noncombustible member 9 are joined and then joined. It may be installed on the decorative board 3.

Next, a fireproof covering structure 10 in which a rectangular steel pipe column 13 to be covered is covered with the fireproof covering member 1 according to the present embodiment will be described with reference to FIGS. 3 and 4. FIG.
For example, as shown in FIG. 3, a rectangular plate-shaped refractory coating member 1 having a width of about several tens cm to 1 m is arranged on four sides of a rectangular steel pipe column 13 so that the decorative plate 3 is the outer surface.
At this time, the inclined surface portions 9a of the second incombustible members 9 of the adjacent fireproof covering members 1 are brought into contact with each other, and the adjacent fireproof covering members 1 are arranged substantially at right angles.

An angle-shaped third noncombustible member 15 bent at right angles is provided between the adjacent fireproof coating members 1, and the third noncombustible member 15 is screwed to the decorative plate 3, so that the adjacent fireproof coating members 1 are separated from each other. The member 1 is connected and joined. Thereby, the peripheral surface of the rectangular steel pipe column 13 can be covered without gaps.
The third noncombustible member 15 preferably has a certain degree of rigidity like the second noncombustible member 9, and if the same material as the second noncombustible member 9 is used, material procurement is easy. In addition, the third incombustible member 15 does not need to have the same length as the square steel pipe column 13 to be covered, and a plurality of relatively short members may be used as long as they are arranged so as to cover the upper and lower fireproof covering members 1. may

A right-angled groove is formed between the adjacent fireproof coated members 1 to expose the third incombustible member 15. If necessary, as shown in FIGS. By arranging the decorative member 17 of the same material as the decorative plate 3, which has a substantially triangular cross section perpendicular to the axis, the surface is covered with the decorative plate 3 and the decorative member 17 of the covering member, and the design is excellent. .

As described above, according to the coated fireproof member 1 of the present embodiment, it is possible to achieve both improvement in designability, improvement in workability, and cost reduction.

In the above-described embodiment, an example of using a thin steel plate as the second noncombustible member 9 is shown, but as described above, a calcium silicate plate, a reinforced gypsum board, or the like is used as the second noncombustible member 9. be able to.
However, since the calcium silicate board, the reinforced gypsum board, etc. are thicker than the thin steel plate, if they are attached to the side surface of the decorative plate 3 in the same manner as the thin steel plate, the second noncombustible member 9 is exposed on the side surface of the decorative plate 3. This results in a lack of design.

Therefore, in this case, as shown in FIG. 5, not the side surface of the decorative plate 3, but the surface of the decorative plate 3 to which the rock wool is sprayed is fixed along both sides with fasteners 11 such as screws. Just do it.
In FIG. 5, the second incombustible member 9 made of a calcium silicate plate, a reinforced gypsum board, or the like has fine dots on the surface to show the difference in material from the thin steel plate. This point is the same in FIG. 6 as well.
As shown in FIG. 5, the corner of the second noncombustible member 9 is cut at approximately 45 degrees to form an inclined surface portion 9a. By bringing the adjacent fireproof coating member 1 and the inclined surface portion 9a into contact with each other, it is possible to assemble them at right angles.
The subsequent attachment of the first incombustible member 7 and the application of the sprayed fireproof covering material 5 are the same as those in the case where the second incombustible member 9 is a thin steel plate.

Further, the second incombustible member 9 can be a combination of a thin steel plate and a thick member such as a calcium silicate plate or a reinforced gypsum board.
In the example shown in FIG. 6, the second incombustible member 9 made of a thin steel plate is used on two of the side surfaces of the decorative plate 3 that will be the end faces in the circumferential direction of the steel pipe when coated, and when coated, the second incombustible member 9 is A thick second incombustible member 9 is used for the remaining two surfaces which are the end surfaces on the sides. By using the second noncombustible member 9 having a thickness on two surfaces that become the axial end surfaces of the steel pipe material when coated, the following effects can be obtained.
That is, when the fireproof coating member 1 is installed in a floating form, a spacer is installed to form a gap between the fireproof coating member 1 and the surface of the square steel pipe column 13 to be coated. In this case, the thick second incombustible member 9 can play a role of bonding with the spacer.
Although it is not necessary to directly join the thick second noncombustible member 9 and the second noncombustible member 9 made of a thin steel plate, both of them need to be joined to the first noncombustible member 7 .

Further, in the above example, as a fireproof coating structure, an example of covering the four surfaces of the rectangular steel pipe column 13 with the fireproof coating member of the present invention was shown, but the fireproof coating structure of the present invention is not limited to this, and the fireproof coating structure is not limited to this. In combination with the walls of the structure, it is also possible to construct a structure in which fireproof coating members are used on three or two sides of the structure to be coated.

Furthermore, in the above example, as the rectangular fireproof covering material, rock wool was sprayed and solidified into a rectangular plate, but the rectangular fireproof covering material according to the present invention is limited to this. Instead, for example, mat-like rock wool may be used. However, the use of sprayed rock wool is more preferable from the viewpoint of cost reduction.

REFERENCE SIGNS LIST 1 fireproof coating member 3 veneer 5 spray fireproof coating material 7 first noncombustible member 9 second noncombustible member 9a inclined surface portion 11 fixture 10 fireproof coating structure 13 rectangular steel pipe column 15 third noncombustible member 17 decorative member

Claims (4)

A rectangular decorative plate, a rectangular plate-shaped fireproof coating material provided so as to cover the decorative plate, and a first noncombustible member provided between the rectangular plate-shaped fireproof coating material and the decorative plate , and a second noncombustible member provided along at least two sides facing each other of the rectangular plate-shaped fireproof coating material, wherein the first noncombustible member and the second noncombustible member are joined ,
The rectangular plate-shaped fireproof coating material is obtained by spraying rock wool onto the decorative plate and solidifying it into a rectangular plate shape,
A fireproof covering member, wherein the second noncombustible member protrudes toward the side of the decorative board on which the first noncombustible member is provided, and functions as a part of a mold when the rock wool is sprayed. 2. The fireproof coated member according to claim 1, wherein said decorative board is made of wood. A plurality of fireproof coating members according to any one of claims 1 or 2 are arranged so as to surround the structure to be coated, and the decorative plate is arranged on the outer surface side, A fireproof covering structure fixed around the structure. A method for manufacturing the fireproof coated member according to claim 1,
placing the first incombustible member on the plate surface of the decorative plate;
arranging the second incombustible member along at least two sides of the decorative plate facing each other and protruding toward the surface of the decorative plate on which the first noncombustible member is arranged;
joining the first incombustible member and the second incombustible member;
and a rock wool spraying step of spraying a mixture of rock wool, solidifying material, and water onto the surface of the decorative board on which the first non-combustible member is arranged, as part of the formwork for the second non-combustible member. A method for manufacturing a fireproof coated member.

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