Fire-resistant covering structure

Abstract

To provide a fire-resistant covering structure capable of constructing a fire-resistant covering material without working a fire-resistant backing material.SOLUTION: The fire resistive covering structure 100 covers a steel structural material 1 composed of a column or a beam with a fire resistive covering material 2. The fireproof covering structure 100 includes a fireproof substrate material 3, a plurality of furring strips 4, and a steel structural material 1 in this order from the outdoor side to the indoor side, and is provided with a welding auxiliary material 5 positioned on an outdoor surface of the furring strip 4 or between the plurality of furring strips 4 so as to correspond to the steel structural material 1. An outdoor side end part 20 of the fireproof covering material 2 is fixed to the welding auxiliary material 5 by a welding pin 6.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fire-resistant covered structure, and more particularly to a fire-resistant covered structure in which steel structural members of a building are covered with a fire-resistant covering material. [Background technology]

[0002] Patent Document 1 describes a fixing structure for a fire-resistant covering material. This fixing structure for a fire-resistant covering material is a structure for fixing a fire-resistant covering material to a concrete body including reinforcing bars, and includes a fire-resistant mounting means and a fire-resistant fixing means. The fire-resistant mounting means is attached to the reinforcing bars. The fire-resistant fixing means is connected to the fire-resistant mounting means by welding and / or mechanical connection. The fire-resistant covering material can be fixed to the concrete body with the fire-resistant fixing means pressing the fire-resistant covering material against the fire-resistant mounting means. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-54856 Summary of the Invention [Problem to be solved by the invention]

[0004] In the invention described in Patent Document 1, the fire-resistant mounting means is attached to reinforcing bars embedded in the concrete body, which means that processing has to be done to attach the fire-resistant mounting means to the concrete body.

[0005] The present invention has been made in view of the above-mentioned circumstances, and aims to provide a fire-resistant covering structure in which a fire-resistant covering material can be applied without processing a fire-resistant base material. [Means for solving the problem]

[0006] The fire-resistant coated structure of the present invention is a fire-resistant coated structure in which steel structural members consisting of columns or beams are coated with a fire-resistant coating material, and the fire-resistant coated structure comprises, in order from the outdoor side to the indoor side, a fire-resistant base material, a plurality of furring strips, and the steel structural members, and welding auxiliary members are provided to correspond to the steel structural members on the outdoor surfaces of the furring strips or between the plurality of furring strips, and the outdoor side end of the fire-resistant coating material is fixed to the welding auxiliary members with a welding pin. [Effects of the Invention]

[0007] According to the present invention, a fire-resistant covering material can be applied to a fire-resistant base material without processing it. [Brief explanation of the drawings]

[0008] [Figure 1] Fig. 1A is a perspective view showing a state before a fire-resistant covering material is applied in a first embodiment of the fire-resistant covering structure according to the present invention, and Fig. 1B is a cross-sectional view showing the state after the fire-resistant covering material is applied. [Figure 2] Fig. 2A is a perspective view showing a state before a fire-resistant covering material is applied in a second embodiment of the fire-resistant covering structure according to the present invention, and Fig. 2B is a cross-sectional view showing the state after the fire-resistant covering material is applied. [Figure 3] FIG. 3 is a perspective view showing a third embodiment of the fire-resistant covering structure according to the present invention in a state before a fire-resistant covering material is applied. [Figure 4] Fig. 4A is a perspective view showing a fourth embodiment of the fire-resistant covering structure according to the present invention before a fire-resistant covering material is applied, and Fig. 4B is a cross-sectional view showing the same after the fire-resistant covering material has been applied. [Figure 5] Fig. 5A is a perspective view showing a state before a fire-resistant covering material is applied in a fifth embodiment of the fire-resistant covering structure according to the present invention, and Fig. 5B is a cross-sectional view showing the state after the fire-resistant covering material is applied. [Figure 6] Fig. 6A is a perspective view showing a sixth embodiment of the fire-resistant covered structure according to the present invention before a fire-resistant covering material is applied, and Fig. 6B is a cross-sectional view showing the same structure after the fire-resistant covering material has been applied. [Figure 7] Fig. 7A is a perspective view showing a seventh embodiment of the fire-resistant covered structure according to the present invention before a fire-resistant covering material is applied, and Fig. 7B is a cross-sectional view showing the same after the fire-resistant covering material has been applied. DETAILED DESCRIPTION OF THE INVENTION

[0009] The fire-resistant covering structure of the present invention will be described below with reference to the drawings. Note that the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios. Furthermore, the following embodiments are merely a part of various embodiments of the present invention. Furthermore, the following embodiments can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Furthermore, the configurations of the modified examples can be combined as appropriate.

[0010] (First embodiment) 1. Overview This embodiment is a fire-resistant coated structure 100 in which a steel structural member 1 consisting of a beam is coated with a fire-resistant coating material 2. The fire-resistant coated structure 100 comprises, in order from the outdoor side to the indoor side, a fire-resistant base material 3, a plurality of furring strips 4, and a steel structural member 1. The fire-resistant coated structure 100 also has a welding auxiliary member 5 provided on the outdoor surface of the furring strips 4 to correspond to the steel structural member 1. The outdoor side end 20 of the fire-resistant coating material 2 is fixed to the welding auxiliary member 5 with a welding pin 6.

[0011] In this embodiment, a welding auxiliary material 5 is provided on the outdoor surface of the furring strip 4 to correspond to the steel structural material 1, so there is no need to provide a welding auxiliary material 5 on the fire-resistant base material 3, and the fire-resistant coating material 2 can be installed without processing the fire-resistant base material 3.

[0012] In the invention of Patent Document 1, a concrete body with built-in rebar must be used, and processing must be performed to attach fire-resistant mounting means to the built-in rebar in the concrete body. On the other hand, in this embodiment, welding auxiliary material 5 is provided on the exterior surface of furring strip 4, so there is no need to process the fire-resistant base material 3 to attach welding auxiliary material 5. Also, in this embodiment, there is no need to embed rebar in the fire-resistant base material 3, and a thin fire-resistant base material 3 can be used.

[0013] 2.Details Fig. 1A shows the fire-resistant covered structure 100 of this embodiment in a state before the fire-resistant covering material 2 is attached. Fig. 1B shows the fire-resistant covered structure 100 of this embodiment in a state after the fire-resistant covering material 2 is attached.

[0014] The fire-resistant covering structure 100 is configured as a wall base for a building, and the exterior wall of the building is formed by attaching an exterior material such as ceramic siding to the outdoor surface of the fire-resistant base material 3 of the fire-resistant covering structure 100.

[0015] In this embodiment, the indoor-outdoor direction is the direction (thickness direction) perpendicular to the surface of the flat-plate-shaped fire-resistant base material 3. The outdoor surface of the fire-resistant base material 3 is the surface of both surfaces of the fire-resistant base material 3 that faces the outdoors (outside) of the building.

[0016] The fire-resistant covering structure 100 includes a steel structural member 1, a fire-resistant covering member 2, a fire-resistant base member 3, a plurality of furring strips 4, a welding auxiliary member 5, and a welding pin 6.

[0017] In this embodiment, the steel structural material 1 is composed of a beam 10. The beam 10 is formed of an H-shaped steel, and is formed with flanges 102 at the upper and lower ends of a web 101. The beam 10 is located on the indoor side (indoor direction) of the fire-resistant base material 3 and the furring strips 4, and is formed to extend approximately horizontally so as to be perpendicular to the indoor-outdoor direction. Note that the beam 10 may be made of various types of steel, such as square steel pipes, L-shaped steel, C-shaped steel, T-shaped steel, angle steel, and channel steel, in addition to H-shaped steel.

[0018] A floor material 15 is placed on the beams 10. The floor material 15 is formed from a flat concrete plate or the like, and is a component that constitutes the floor of a building. The floor material 15 is placed and fixed on the upper flange 102 of the beam 10, which is an H-shaped steel. The outdoor end face of the floor material 15 (the end face facing the outdoors) abuts against the indoor surface of the furring strips 4. In addition, between adjacent furring strips 4, a blocking filler 12 is provided between the outdoor end face of the floor material 15 and the indoor surface 30 of the fire-resistant base material 3. The blocking filler 12 is a component that blocks the gap between the outdoor end face of the floor material 15 and the indoor surface 30 of the fire-resistant base material 3, and is made of, for example, rock wool.

[0019] The fire-resistant covering material 2 is a component that protects the beam 10 from flames such as fires and ensures the fire resistance of the fire-resistant covered structure 100. The fire-resistant covering material 2 is made of a highly fire-resistant material, such as rock wool, calcium silicate, or gypsum, and is formed into a shape such as a sheet, mat, or plate. The fire-resistant covering material 2 has a generally L-shaped cross section and is provided so as to cover the indoor surface (the surface facing indoors) and underside of the beam 10. The fire-resistant covering material 2 is provided over the entire longitudinal length of the beam 10.

[0020] The fire-resistant base material 3 is a base material for attaching exterior materials such as ceramic siding. The fire-resistant base material 3 is made of a highly fire-resistant material, such as a calcium silicate board or gypsum board, and is formed into a flat plate shape. The fire-resistant base material 3 is placed on the outdoor side of the beams 10 and furring strips 4. The fire-resistant base material 3 is fixed to the furring strips 4 with fasteners such as nails or screws.

[0021] The furring strips 4 are members for attaching and fixing the fire-resistant base material 3. In this embodiment, they are vertical furring strips 40 that are long in the vertical direction. The furring strips 4 can be made of C-shaped steel, but are not limited to this. The furring strips 4 may also be made of various types of shaped steel, such as square steel pipes, L-shaped steel, H-shaped steel, T-shaped steel, angle steel, and channel steel.

[0022] The furring strips 4 are attached to the beam 10 by support members 41. The support members 41 are made of members such as L-shaped steel. One end (the indoor end) of the support member 41 is fixed to the lower flange 102 of the beam 10, and the other end (the outdoor end) of the support member 41 is joined to the side of the furring strip 4. As a result, the furring strips 4 are positioned on the outdoor side of the beam 10 and on the indoor side of the fire-resistant base material 3. In this embodiment, multiple furring strips 4 are arranged side by side along the longitudinal direction of the beam 10 at a predetermined interval (for example, 606 mm).

[0023] The welding auxiliary material 5 is a member for welding and joining the welding pin 6. The welding auxiliary material 5 can be formed from a conductive metal plate. For example, a thin iron plate or steel plate (approximately 0.3 mm thick) can be used as the welding auxiliary material 5. The welding auxiliary material 5 is provided between the fire-resistant base material 3 and the furring strip 4. The welding auxiliary material 5 is placed on the exterior surface of the furring strip 4 and is fixed to the furring strip 4 by means of fixing devices such as screws, welding, etc.

[0024] The welding auxiliary material 5 is provided to correspond to the beam 10. Specifically, the welding auxiliary material 5 is provided at a position facing the lower part of the beam 10. The lower end of the welding auxiliary material 5 is located at a height below the lower surface of the flange 102 on the lower side of the beam 10. The upper end of the welding auxiliary material 5 is located at a height slightly below the center in the vertical direction of the web 101 of the beam 10. The welding auxiliary material 5 is also formed in the shape of a long strip along the longitudinal direction of the beam 10. The welding auxiliary material 5 is provided so as to face the beam 10 over almost its entire length.

[0025] The welding pin 6 is a member for fixing the fire-resistant covering material 2. The welding pin 6 can be made of a metal pin having electrical conductivity. For example, the welding pin 6 can be made of an iron or steel nail or screw.

[0026] In this embodiment, the fire-resistant covering material 2 is fixed to the beam 10 (steel structural material 1) and the welding auxiliary material 5 by a welding pin 6. An outdoor end 20, which is one end of the fire-resistant covering material 2, is fixed to the welding auxiliary material 5. The outdoor end 20 of the fire-resistant covering material 2 is arranged in contact with the lower part of the indoor surface of the welding auxiliary material 5. A welding pin 6 is inserted into the outdoor end 20 from its outer surface toward the welding auxiliary material 5. The tip of the welding pin 6 is welded and fixed to the lower part of the indoor surface of the welding auxiliary material 5. Stud welding or the like is used to weld the tip of the welding pin 6 to the welding auxiliary material 5. That is, by passing a current between the welding pin 6 and the welding auxiliary material 5, an arc discharge is generated between the tip of the welding pin 6 and the indoor surface of the welding auxiliary material 5, and this arc discharge moderately melts and joins the tip of the welding pin 6 and the indoor surface of the welding auxiliary material 5.

[0027] The other end of the fire-resistant covering material 2, that is, an indoor end 21, is fixed to the beam 10. The indoor end 21 of the fire-resistant covering material 2 is disposed in contact with the indoor surface of the beam 10. In this embodiment, the indoor end 21 is in contact with the indoor surface of the upper flange 102 of the H-shaped steel. A welding pin 6 is inserted into the indoor end 21 from its outer surface toward the upper flange 102 of the beam 10. The tip of the welding pin 6 is welded and fixed to the indoor surface of the upper flange 102. Stud welding or the like is used to weld the tip of the welding pin 6 to the upper flange 102 of the beam 10. That is, by passing a current between the welding pin 6 and the beam 10, an arc discharge is generated between the tip of the welding pin 6 and the indoor surface of the upper flange 102. This arc discharge appropriately melts and joins the tip of the welding pin 6 and the indoor surface of the upper flange 102.

[0028] There are multiple welding pins 6 for fixing the outdoor end 20 and multiple welding pins 6 for fixing the indoor end 21. The multiple welding pins 6 are arranged along the longitudinal direction of the beam 10 at predetermined intervals (approximately 2 to 5 pins between adjacent furring strips 4).

[0029] The outdoor end 20 abuts (contacts) the indoor surface 30 of the fire-resistant base material 3 below the welding auxiliary material 5. The indoor end 21 abuts (contacts) the underside of the floor material 15 on the indoor side of the upper flange 102 of the beam 10. As a result, the space between the beam 10 and the fire-resistant base material 3 is more easily sealed with the fire-resistant covering material 2 without any gaps, making it more difficult for flames to penetrate into the space between the beam 10 and the fire-resistant base material 3, improving the fire resistance of the fire-resistant covering structure 100.

[0030] Furthermore, since the fire-resistant covering structure 100 provides the welding auxiliary material 5 on the outdoor surface of the furring strip 4, there is no need to perform processing to attach the welding auxiliary material 5 to the fire-resistant base material 3.

[0031] (Second embodiment) The fire-resistant coated structure 100 according to this embodiment differs from the fire-resistant coated structure 100 according to the first embodiment in the configuration of the welding auxiliary material 5. Hereinafter, the same configuration as in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted as appropriate. The configuration described in the second embodiment can be applied in appropriate combination with the configuration described in the first embodiment.

[0032] In the first embodiment, the flat welding auxiliary material 5 is provided on the exterior surface of the furring strip 4, but in this embodiment, the welding auxiliary material 5 is provided between a plurality of furring strips 4.

[0033] As shown in FIGS. 2A and 2B , in this embodiment, a welding auxiliary member 5 is disposed between adjacent furring strips 4 (vertical furring strips 40). Like the furring strips 4, the welding auxiliary member 5 is formed using shaped steel such as C-shaped steel. The welding auxiliary member 5 is formed to extend along the longitudinal direction of the beam 10, with one longitudinal end and the other longitudinal end of the welding auxiliary member 5 fixed to one and the other of adjacent furring strips 4, respectively. The welding auxiliary member 5 is positioned on the exterior side of the beam 10 and is provided so as to face the lower flange 102 of the lower part of the beam 10. A support member 41 is joined to the upper surface of the welding auxiliary member 5. A plurality of welding auxiliary members 5 are provided along the longitudinal direction of the beam 10. The exterior-side end 20 of the fire-resistant covering material 2 is fixed to the welding auxiliary member 5 by a welding pin 6. The tip of the welding pin 6 is welded to the underside of the welding auxiliary member 5.

[0034] In this embodiment, the welding auxiliary material 5 is installed between adjacent furring strips 4, so that the welding auxiliary material 5 acts like a horizontal furring strip and can reinforce multiple furring strips 4.

[0035] (Third embodiment) The fire-resistant coated structure 100 according to this embodiment differs from the fire-resistant coated structure 100 according to the first and second embodiments in the configuration of the welding auxiliary material 5. Hereinafter, the same configurations as those in the first and second embodiments will be denoted by common reference numerals and will not be described as appropriate. The configuration described in the third embodiment can be applied in appropriate combination with the configurations described in the first and second embodiments.

[0036] In the second embodiment, the furring strips 4 are composed of vertical furring strips 40 that are continuous in the vertical direction, and welding auxiliary materials 5 are provided between adjacent vertical furring strips 40, but in this embodiment, the welding auxiliary materials 5 are formed so as to be continuous along the longitudinal direction of the beam 10.

[0037] As shown in Fig. 3, in this embodiment, the welding auxiliary material 5 is formed long and continuous along the longitudinal direction of the beam 10. A plurality of furring strips 4 (vertical furring strips 40) are provided above and below the welding auxiliary material 5. Like the furring strips 4, the welding auxiliary material 5 is formed using shaped steel such as C-shaped steel.

[0038] In this embodiment, the fire-resistant covering structure 100 has a cross-sectional shape similar to that shown in FIG. 2B. That is, the welding auxiliary member 5 is located on the exterior side of the beam 10 and is provided so as to face the lower flange 102 at the bottom of the beam 10. A support member 41 is joined to the upper surface of the welding auxiliary member 5. The welding auxiliary member 5 is provided over the entire length of the beam 10 in the longitudinal direction. The exterior-side end portion 20 of the fire-resistant covering member 2 is fixed to the welding auxiliary member 5 by a welding pin 6. The tip of the welding pin 6 is welded to the underside of the welding auxiliary member 5.

[0039] In this embodiment, the welding auxiliary material 5 is arranged continuously along the longitudinal direction of the beam 10, so that the welding auxiliary material 5 acts like a horizontal furring strip and can reinforce multiple furring strips 4.

[0040] (Fourth embodiment) The fire-resistant covered structure 100 according to this embodiment differs from the fire-resistant covered structures 100 according to the first to third embodiments in the configurations of the steel structural member 1 and the welding auxiliary member 5. Hereinafter, the same configurations as those in the first to third embodiments will be denoted by the same reference numerals and will not be described as appropriate. The configuration described in the fourth embodiment can be applied in appropriate combination with the configurations described in the first to third embodiments.

[0041] As shown in Figures 4A and 4B, in this embodiment, the steel structural member 1 is composed of a column 11. The column 11 is formed of a square steel pipe. The column 11 is located on the indoor side (indoor direction) of the fire-resistant base material 3 and the furring strips 4, and is formed to extend approximately vertically so as to be perpendicular to the indoor-outdoor direction. Note that the column 11 may be made of various types of steel, such as H-shaped steel, L-shaped steel, C-shaped steel, T-shaped steel, angle steel, and channel steel, in addition to square steel pipes.

[0042] The welding auxiliary material 5 is provided between the fire-resistant base material 3 and the furring strips 4. The welding auxiliary material 5 is placed on the exterior surface of the furring strips 4 and fixed to the furring strips 4 with fasteners such as screws or by welding. The welding auxiliary material 5 is provided to correspond to the column 11. The welding auxiliary material 5 is formed in the shape of a long strip along the longitudinal direction of the column 11. The welding auxiliary material 5 is provided in a position facing the exterior surface (surface facing the outdoors) 111 of the column 11. Both ends of the welding auxiliary material 5 in the left-right direction (direction perpendicular to both the longitudinal direction of the column 11 and the indoor-outdoor direction) are located to the left and right of both ends of the column 11 in the left-right direction. The welding auxiliary material 5 is provided to face the column 11 over almost its entire length. A pair of furring strips 4 (vertical furring strips 40) is provided between the exterior surface 111 of the column 11 and the welding auxiliary material 5.

[0043] The fire-resistant covering material 2 is a component that protects the column 11 from flames such as fires and ensures the fire resistance of the fire-resistant covered structure 100. As described above, the fire-resistant covering material 2 is made of a highly fire-resistant material. The fire-resistant covering material 2 has a roughly U-shaped cross section and is provided so as to cover the outer surfaces of the column 11 except for the outdoor surface 111. In other words, the fire-resistant covering material 2 is provided so as to cover the indoor surface of the column 11 and both side surfaces (outer surfaces parallel to the longitudinal direction of the column 11). The fire-resistant covering material 2 is also provided over the entire longitudinal length of the column 11.

[0044] In this embodiment, the fire-resistant covering material 2 is fixed to the welding auxiliary material 5 by a welding pin 6. The outdoor end portions 20, which are both ends of the fire-resistant covering material 2, are fixed to the welding auxiliary material 5. The outdoor end portion 20 of the fire-resistant covering material 2 is arranged in contact with the left and right ends of the indoor surface of the welding auxiliary material 5. A welding pin 6 is inserted into the outdoor end portion 20 from its outer surface toward the welding auxiliary material 5. The tip portions of the welding pin 6 are welded and fixed to the left and right ends of the indoor surface of the welding auxiliary material 5. When welding the tip portions of the welding pin 6 to the welding auxiliary material 5, stud welding or the like similar to that described above is used.

[0045] A plurality of welding pins 6 are provided to secure the outdoor end portion 20. The plurality of welding pins 6 are arranged in a row at predetermined intervals along the longitudinal direction of the column 11. The outdoor end portion 20 abuts (contacts) the indoor surface 30 of the fire-resistant base material 3 on the sides (left and right sides) of the welding auxiliary material 5. This makes it easier to seal the space between the column 11 and the fire-resistant base material 3 without any gaps with the fire-resistant covering material 2, making it more difficult for flames to penetrate into the space between the column 11 and the fire-resistant base material 3, and improving the fire resistance of the fire-resistant covering structure 100.

[0046] Furthermore, since the fire-resistant covering structure 100 provides the welding auxiliary material 5 on the outdoor surface of the furring strip 4, there is no need to perform processing to attach the welding auxiliary material 5 to the fire-resistant base material 3.

[0047] (Fifth embodiment) The fire-resistant coated structure 100 according to this embodiment differs from the fire-resistant coated structure 100 according to the fourth embodiment in the configuration of the welding auxiliary material 5. Hereinafter, the same configuration as in the fourth embodiment will be denoted by the same reference numerals and the description thereof will be omitted as appropriate. The configuration described in the fifth embodiment can be applied in appropriate combination with the configuration described in the fourth embodiment.

[0048] In the fourth embodiment, flat welding auxiliary materials 5 were provided on the outdoor surfaces of a pair of furring strips 4 located opposite the outdoor side of the column 11, but in this embodiment, welding auxiliary materials 5 are provided across the outdoor surfaces of multiple furring strips 4.

[0049] 5A and 5B, in this embodiment, the welding auxiliary material 5 is arranged across the exterior surfaces of multiple furring strips 4 (vertical furring strips 40). This welding auxiliary material 5 is arranged between a pair of furring strips 4 located opposite the exterior side of the column 11 and the fire-resistant base material 3, but both left and right ends of the welding auxiliary material 5 reach other furring strips 4 (vertical furring strips 40) adjacent to the pair of furring strips 4. In other words, the left and right dimension of the welding auxiliary material 5 in this embodiment is larger than the left and right dimension of the welding auxiliary material 5 in the fourth embodiment.

[0050] In this embodiment, the outdoor end 20 of the fire-resistant covering material 2 is arranged in contact with the indoor surface of the welding auxiliary material 5. A welding pin 6 is inserted into the outdoor end 20 from its outer surface toward the welding auxiliary material 5. The tip of the welding pin 6 is welded and fixed to the indoor surface of the welding auxiliary material 5. Stud welding, as described above, is used to weld the tip of the welding pin 6 to the welding auxiliary material 5. A plurality of welding pins 6 are provided to fix the outdoor end 20. The plurality of welding pins 6 are arranged in a line at predetermined intervals along the longitudinal direction of the column 11. The outdoor end 20 abuts (contacts) against the indoor surface of the welding auxiliary material 5. This makes it easier for the fire-resistant covering material 2 to seal the space between the column 11 and the fire-resistant base material 3 without any gaps, making it more difficult for flames to penetrate into the space between the column 11 and the fire-resistant base material 3, thereby improving the fire resistance of the fire-resistant covering structure 100.

[0051] In the fire-resistant covering structure 100, the welding auxiliary materials 5 can be joined to the exterior surfaces of the plurality of furring strips 4, and the welding auxiliary materials 5 can be firmly attached.

[0052] (Sixth embodiment) The fire-resistant coated structure 100 according to this embodiment differs from the fire-resistant coated structures 100 according to the fourth and fifth embodiments in the configuration of the welding auxiliary material 5. Hereinafter, the same configurations as those in the fourth and fifth embodiments will be denoted by common reference numerals and will not be described as appropriate. The configuration described in the sixth embodiment can be applied in appropriate combination with the configurations described in the fourth and fifth embodiments.

[0053] In the fourth and fifth embodiments, a flat welding auxiliary material 5 was provided on the outdoor surface of the furring strip 4, but in this embodiment, multiple welding auxiliary materials 5 with an L-shaped cross section are provided on a surface perpendicular to the outdoor surface of the furring strip 4.

[0054] As shown in Figures 6A and 6B, in this embodiment, the welding auxiliary material 5 is arranged on a surface perpendicular to the exterior surface of a pair of furring strips 4 (vertical furring strips 40). Multiple welding auxiliary materials 5 are arranged on both sides of the pair of furring strips 4. This L-shaped cross-section welding auxiliary material 5 has one end of the L-shaped cross-section arranged on each surface perpendicular to the exterior surface of the pair of furring strips 4 located opposite the column 11, and the other end is arranged to protrude toward the other furring strip 4 (vertical furring strip 40) adjacent to the pair of furring strips 4 so that its exterior surface is flush with the exterior surface of the furring strips 4. However, both left and right ends of the welding auxiliary material 5 do not reach the other furring strip 4 (vertical furring strip 40) adjacent to the pair of furring strips 4. In other words, unlike the fourth and fifth embodiments, the welding auxiliary material 5 in this embodiment is not arranged between the furring strips 4 and the fire-resistant base material 3.

[0055] In this embodiment, the outdoor end 20 of the fire-resistant covering material 2 is disposed in contact with the indoor surface of the other half of the welding auxiliary material 5, which has an L-shaped cross section. A welding pin 6 is inserted into the outdoor end 20 from its outer surface toward the welding auxiliary material 5. The tip of the welding pin 6 is welded and fixed to the indoor surface of the welding auxiliary material 5. Stud welding, as described above, is used to weld the tip of the welding pin 6 to the welding auxiliary material 5. A plurality of welding pins 6 are provided to fix the outdoor end 20. The plurality of welding pins 6 are arranged in a line at predetermined intervals along the longitudinal direction of the column 11. The outdoor end 20 abuts (contacts) from the indoor surface of the welding auxiliary material 5 to the fire-resistant base material 3. This makes it easier for the fire-resistant covering material 2 to seal the space between the column 11 and the fire-resistant base material 3 without any gaps, making it more difficult for flames to penetrate into the space between the column 11 and the fire-resistant base material 3, thereby improving the fire resistance of the fire-resistant covering structure 100.

[0056] Furthermore, in the fire-resistant covering structure 100, since the welding auxiliary material 5 is not disposed between the furring strip 4 and the fire-resistant base material 3, unevenness in the fire-resistant base material 3 is less likely to occur.

[0057] (Seventh embodiment) The fire-resistant coated structure 100 according to this embodiment differs from the fire-resistant coated structures 100 according to the fourth, fifth, and sixth embodiments in the configuration of the welding auxiliary material 5. Hereinafter, the same configurations as those in the fourth, fifth, and sixth embodiments will be denoted by common reference numerals and explanations thereof will be omitted as appropriate. The configuration described in the seventh embodiment can be applied in appropriate combination with the configurations described in the fourth, fifth, and sixth embodiments.

[0058] In the fourth, fifth and sixth embodiments, the flat welding auxiliary material 5 is provided on the exterior surface of the furring strip 4, but in this embodiment, the welding auxiliary material 5 is provided between a plurality of adjacent furring strips 4.

[0059] As shown in Figures 7A and 7B, in this embodiment, a welding auxiliary material 5 is arranged between adjacent furring strips 4 (vertical furring strips 40). Like the furring strips 4, this welding auxiliary material 5 is formed using shaped steel such as C-shaped steel. The welding auxiliary material 5 is formed to extend along the longitudinal direction of the column 11, and the welding auxiliary material 5 and the adjacent furring strips 4 are arranged approximately parallel to each other. The welding auxiliary material 5 is also located on the outdoor side of the column 11, and is arranged to face the outdoor surface 111 of the column 11.

[0060] One outdoor end 20 of the fire-resistant covering material 2 is fixed to the welding auxiliary material 5 by a welding pin 6. The tip of the welding pin 6 is welded to the side of the welding auxiliary material 5. The other outdoor end 20 of the fire-resistant covering material 2 is fixed to the furring strip 4 facing the outdoor surface 111 of the column 11 by a welding pin 6. The tip of the welding pin 6 is welded to the side of the furring strip 4.

[0061] In this embodiment, the welding auxiliary material 5 is arranged continuously along the longitudinal direction of the column 11, so that the welding auxiliary material 5 acts like a vertical furring strip 40 and can reinforce the fire-resistant coating structure 100.

[0062] (summary) The first aspect is a fire-resistant coated structure 100 in which a steel structural member 1 consisting of a column or beam is coated with a fire-resistant coating material 2. The fire-resistant coated structure 100 comprises, in order from the outdoor side toward the indoor side, a fire-resistant base material 3, a plurality of furring strips 4, and a steel structural member 1, and also has welding auxiliary members 5 located on the outdoor surface of the furring strips 4 or between the plurality of furring strips 4 so as to correspond to the steel structural member 1. The outdoor end portion 20 of the fire-resistant coating material 2 is fixed to the welding auxiliary member 5 with a welding pin 6.

[0063] According to this embodiment, a welding auxiliary material 5 is provided on the outdoor surface of the furring strip 4 or between multiple furring strips 4 to correspond to the steel structural material 1, and the outdoor end 20 of the fire-resistant coating material 2 is fixed to the welding auxiliary material 5 with a welding pin 6, so there is no need to provide the welding auxiliary material 5 on the fire-resistant base material 3, and the fire-resistant coating material 2 can be installed without processing the fire-resistant base material 3.

[0064] The second embodiment is the fire-resistant covered structure 100 according to the first embodiment, in which the welding auxiliary material 5 is fixed to the furring strip 4.

[0065] According to this embodiment, there is no need to provide the welding auxiliary material 5 on the fireproof base material 3, and the fireproof covering material 2 can be applied without processing the fireproof base material 3.

[0066] The third aspect is the fire-resistant covered structure 100 according to the first or second aspect, in which the outdoor end 20 of the fire-resistant covering material 2 abuts against the indoor surface 30 of the fire-resistant base material 3.

[0067] According to this embodiment, gaps are less likely to occur between the fire-resistant covering material 2 and the fire-resistant base material 3, and fire resistance can be improved. [Explanation of symbols]

[0068] 1 Steel structural materials 2 Fireproof coating 20 Outdoor end 3. Fireproof base material 30 Indoor surface 4. Fuselage 5 Welding auxiliary materials 6 welding pins

Claims

1. A fire-resistant covering structure in which steel structural members consisting of columns or beams are covered with fire-resistant covering materials, The fire-resistant covering structure includes, in order from the outdoor side toward the indoor side, a fire-resistant base material, a plurality of furring strips, and the steel structural material, and also includes welding auxiliary materials positioned on the outdoor surface of the furring strips or between the plurality of furring strips so as to correspond to the steel structural material, The outdoor end of the fire-resistant covering material is fixed to the welding auxiliary material by a welding pin. Fire-resistant coated structure.

2. The welding auxiliary material is fixed to the furring strip. The fire-resistant coated structure of claim 1.

3. The outdoor end of the fire-resistant covering material is in contact with the indoor surface of the fire-resistant base material. The fire-resistant coated structure according to claim 1 or 2.

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