Shaft material with base material, and fire-resistant covered structure

Abstract

To provide a shaft material with a base material and a fire-resistant covered structure that are easy to install when installing the fire-resistant covered structure.SOLUTION: A shaft material 9 with a base material according to the present invention includes a metal shaft material (steel pipe 10) and a base material provided on the surface of the shaft material, and a base material 11 is provided on the surface side of the shaft material so as to extend in the circumferential direction around the shaft axis of the shaft material. Also, a fire-resistant covered structure 1 according to the present invention includes the shaft material 9 with a base material, a fire-resistant material 4 provided on the surface of the shaft material (surface 10f of the steel pipe 10), and a board material 2 attached to the base material 11 so as to cover the surface of the shaft material and the fire-resistant material 4.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a shaft member with a base material provided with a base material for attaching a board material to the surface of the shaft member, and to a fire-resistant coated structure constructed using the shaft member with a base material. [Background technology]

[0002] Known fire-resistant structures 10 (fire-resistant coated structures) include a steel pipe with a base material (shaft material) configured with an attachment member 13 (base material) such as an angle attached to the surface of the steel pipe (shaft material), and a wooden board portion 21 (board material) attached to the base material of the steel pipe with a base material using an attachment member 25 such as a screw, and fire-resistant material 23 provided on the inner surface of the wooden board portion 21 (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7318837 Summary of the Invention [Problem to be solved by the invention]

[0004] Instead of the fire-resistant material of the fire-resistant coated structure disclosed in Patent Document 1, a fire-resistant coated structure may be constructed by applying fire-resistant material to the surface of a steel pipe with a base material, and then attaching a wooden board (board material) to the base material of the steel pipe with a base material using mounting materials such as screws. However, in the steel pipe with base material disclosed in Patent Document 1, the mounting member 13 (base material) such as an angle is provided on the surface of the steel pipe so as to extend in a direction (vertical direction) along the central axis of the steel pipe. Therefore, when attempting to construct the above-mentioned fire-resistant covering structure using the steel pipe with base material disclosed in Patent Document 1, the fire-resistant material cannot be provided by wrapping it around the outer periphery of the surface of the steel pipe. In other words, if the fire-resistant material were to be wrapped around the outer periphery of the surface of the steel pipe with base material disclosed in Patent Document 1, the fire-resistant material would be positioned so as to cover the surface of the base material, and would be sandwiched between the surface of the base material and the wooden board attached to the base material, making the attachment of the wooden board to the base material unstable. Therefore, when using a steel pipe with a base material as a shaft material with a base material as disclosed in Patent Document 1, it is necessary to provide the fire-resistant material so that it does not cover the surface of the base material.In order to prevent the fire-resistant material from covering the surface of the base material, the fire-resistant material must be cut into pieces of size corresponding to each surface of each of the square surfaces of the steel pipe and each of the surfaces of each corner of the square surfaces of the steel pipe, and then these cut pieces of fire-resistant material must be provided on each surface, which makes the installation very cumbersome. As described above, when constructing a fire-resistant covering structure using the steel pipe with base material as the shaft member with base material disclosed in Patent Document 1, problems arise in terms of workability. An object of the present invention is to provide a shaft material with a base material and a fire-resistant covered structure that are easy to install when installing a fire-resistant covered structure. [Means for solving the problem]

[0005] The shaft material with base material of the present invention is a shaft material with base material comprising a metal shaft material and a base material provided on the surface of the shaft material, characterized in that the base material is provided on the surface side of the shaft material so as to extend circumferentially around the shaft axis of the shaft material. The shaft material is a steel pipe used as a pillar, and the base material is provided so as to extend in a direction along the outer periphery of the pillar. The shaft material is an H-shaped steel beam used as a beam, and the base material is arranged to extend from the widthwise end face of one flange that forms the side of the beam to the widthwise end face of the other flange, and is also arranged to extend in the width direction of the beam on the underside of the other flange that forms the underside of the beam. The shaft member is an H-shaped steel beam used as a pillar or beam, and the base member is provided so as to extend in a direction along the outer periphery of the pillar or beam. The base material is also characterized by being formed by a steel section attached to the surface of the shaft material. According to the shaft material with base material of the present invention, fire-resistant material can be provided on the surface side of the shaft material so that it extends circumferentially around the shaft axis of the shaft material, making it possible to easily and simply provide fire-resistant material on the surface of the shaft material.This makes it possible to provide a shaft material with base material that is easy to install when using the shaft material with base material to install a fire-resistant covering structure. In addition, the fire-resistant coated structure of the present invention is characterized by comprising the above-mentioned shaft material with base material, fire-resistant material provided on the surface of the shaft material, and board material attached to the base material so as to cover the surface of the shaft material and the fire-resistant material. The shaft material is a steel pipe used as a pillar or an H-shaped steel beam used as a pillar or beam, and the fire-resistant material is arranged so as to be wrapped around the outer periphery of the surface of the pillar or beam. The shaft material is an H-shaped steel beam used as a beam, and the fire-resistant material extends circumferentially around the beam axis and covers one side of the beam, the underside of the beam, and the other side of the beam. The present invention is also characterized in that a fire-resistant material is provided between the surface of the shaft material and the base material. The board material is characterized in that it is a wood board, a gypsum board, or a calcium silicate board. According to the fire-resistant covered structure of the present invention, it is possible to provide a fire-resistant covered structure that is easy to install. [Brief explanation of the drawings]

[0006] [Figure 1]1A and 1B are diagrams showing a fire-resistant covered column as a fire-resistant covered structure, in which (a) is a front view, and (b) is a front view showing the state in which the board material on the front side of (a) has been removed (Embodiment 1). [Figure 2] AA cross-sectional view of FIG. 1(a) (cross-sectional view of a fire-resistant coated column) (Embodiment 1). [Figure 3] These are longitudinal cross-sectional views of a fire-resistant coated column near its base material, where (a) shows a case where a lip channel steel (C channel) is used as the base material, (b) shows a case where an angle steel (angle) is used as the base material, (c) shows a case where a hat steel is used as the base material, and (d) shows a case where an H-shaped steel is used as the base material (embodiment 1). [Figure 4] Front view (embodiment 1) showing a pillar with base material as a shaft material with base material. [Figure 5] AA cross-sectional view of Figure 1(a) (cross-sectional view of a pillar with a base material) (Embodiment 1). [Figure 6] FIG. 10 is a side view showing a fire-resistant coated beam as a fire-resistant coated structure (Embodiment 3). [Figure 7] 1A is a cross-sectional view taken along line AA in FIG. 1, FIG. 1B is a cross-sectional view taken along line BB in FIG. 1, and FIG. 1C is an enlarged cross-sectional view showing the mounting state of the board material and the fire-resistant material on the base material (Embodiment 3). [Figure 8] 10A and 10B are diagrams showing the construction procedure for a fire-resistant coated beam as a fire-resistant coated structure, in which (a) is a perspective view of the main part showing the state of the beam with the base material, (b) is a perspective view of the main part showing the state of the fire-resistant material attached to the underside and side of the beam with the base material, and (c) is a perspective view of the main part showing the state of the fire-resistant coated beam (embodiment 3). [Figure 9] FIG. 10 is an exploded perspective view of a fire-resistant coated beam (embodiment 3). [Figure 10] FIG. 10 is a front view showing a fire-resistant covered column as a fire-resistant covered structure (Embodiment 4). [Figure 11] 10A is a cross-sectional view taken along line AA in FIG. 10, and FIG. 10B is a cross-sectional view taken along line BB in FIG. 10 (Embodiment 4). DETAILED DESCRIPTION OF THE INVENTION

[0007] As shown in Figures 1 to 11, the fire-resistant coated structure of the present invention (fire-resistant coated column 1, fire-resistant coated beam 1A, fire-resistant coated column 1B, fire-resistant coated beam) is composed of a shaft material with a base material (column 9 with a base material, beam 9A with a base material, column 9B with a base material, beam with a base material), a fire-resistant material 4, and a board material 2. The shaft members 9, 9A, 9B with base material according to the present invention are configured to include a metal shaft member and a base member 11, 11A, 11B provided on the surface of the shaft member. The shaft material is, for example, a steel pipe 10A used as a column (embodiment 1), an H-shaped steel 10A used as a beam (embodiment 3), an H-shaped steel 10B used as a column (embodiment 4), an H-shaped steel used as a beam (embodiment 5), etc. The base materials 11, 11A, and 11B are provided on the surface side of the shaft material so as to extend in the circumferential direction around the shaft axis. The base materials 11, 11A, 11B are formed, for example, by section steel attached to a shaft material. The fireproof material 4 is provided so as to cover the surface side of the shaft material. The board material 2 is a plate material attached to the base materials 11, 11A, and 11B so as to cover the surface of the shaft material and the fireproof material 4.

[0008] Embodiment 1 As shown in Figures 1 to 3, a fire-resistant coated column 1 as a fire-resistant coated structure of embodiment 1 is configured, for example, to include a base-equipped column 9 as a shaft material with a base material, a fire-resistant material 4, and a board material 2. As shown in Figures 4 and 5, the column 9 with base material in embodiment 1 is composed of a steel pipe 10 as a metal shaft material used, for example, as a column, and a base material 11 provided on the surface 10f of the steel pipe 10. The base material 11 forms a mounting surface for the board material 2, and is a member to which mounting materials such as screws 3 for mounting the board material 2 are attached. In the fire-resistant coated column 1 and the column with base material 9 according to embodiment 1, up, down, left, right, front, and rear will be defined as the directions shown in FIGS. 2 is a cross-sectional view taken along line AA in FIG. 1(a), and FIG. 5 is a cross-sectional view taken along line AA in FIG. 4, but hatching of the cross-sectional portions has been omitted in FIGS.

[0009] The steel pipe 10 is, for example, a square steel pipe having a hollow rectangular cross section. Examples of square steel pipes include cold roll-formed square steel pipes, cold press-formed square steel pipes, and assembled four-sided box square steel pipes.

[0010] The base material 11 is provided so as to extend in a direction (lateral direction) along the outer periphery of the surface 10f of the steel pipe 10 that constitutes the column. That is, as shown in Figures 4 and 5, the column 9 with base material has a circumferential base portion 11S formed by four base materials 11, 11... arranged on the front, back, left and right sides, which are extended in the left-right (horizontal) or front-to-back (horizontal) direction on each of the square surfaces 10f, 10f... of the steel pipe 10 (each side surface of the steel pipe 10), and multiple circumferential base portions 11S are arranged at predetermined intervals along the vertical direction of the steel pipe 10 (column). Furthermore, no base material 11 is provided at the four corners of the steel pipe 10, and the circumferential base portion 11S is composed of four individual base materials 11, 11... provided so as to be positioned on the same horizontal plane on each surface 10f of the steel pipe 10. In other words, the circumferential base portion 11S has a configuration in which the base material 11 is missing at the four corners of the steel pipe 10.

[0011] The base material 11 may be, for example, a structural steel (long steel material) such as a lip channel steel, a channel steel, an angle steel, a hat steel, or an H-shaped steel, which is attached by welding or the like to the surface 10f of the steel pipe 10 that constitutes the column. FIG. 3( a ) shows a cross-sectional view of a case where a lip channel steel (C channel) is used as the base material 11 . FIG. 3( b ) shows a cross-sectional view of an angle iron used as the base material 11 . FIG. 3( c ) shows a cross-sectional view of a case where a hat-shaped steel is used as the base material 11 . FIG. 3( d ) shows a cross-sectional view of a case where an H-shaped steel is used as the base material 11 . In Figures 3(a), 3(b), 3(c), and 3(d), the parts indicated by the symbol w indicate welded parts. The steel section used as the base material 11 is, for example, a small lightweight steel section. For example, the base material 11 has a cross-sectional shape shown in FIG. 3 with a vertical dimension of about 30 mm to 100 mm, a horizontal dimension of about 30 mm to 100 mm, and a thickness of about 2 mm to 3 mm.

[0012] The hat-shaped steel is the same as the hat-shaped steel used as the base material 11A in the third embodiment described later. That is, the hat-shaped steel is composed of a long first flat plate portion 11a, a pair of long connecting flat plate portions 11b, 11b as connecting portions, and a pair of long second flat plate portions 11c, 11c (see Figures 8 and 9). A pair of long connecting flat plate portions 11b, 11b serving as connecting portions are provided so as to extend in the same direction from both ends of the first flat plate portion 11a in the width direction, which is a direction perpendicular to the longitudinal direction of the first flat plate portion 11a. The pair of long second flat plate portions 11c, 11c are provided so as to extend in directions away from the extension ends of the respective connecting flat plate portions 11b, 11b. In other words, the hat-shaped steel is composed of a first flat plate portion 11a corresponding to the top crown (ceiling of the hat), second flat plate portions 11b, 11b corresponding to the side crown (side surface of the hat), and third flat plate portions 11c, 11c corresponding to the rim (brim) of the hat. In other words, it is a long steel material with a hat-shaped cross section. In the hat-shaped steel, for example, the angle formed between the plate surface of the first flat plate portion 11a and the plate surface of the second flat plate portion 11b is preferably 90°, and the angle formed between the plate surface of the second flat plate portion 11b and the plate surface of the third flat plate portion 11c is preferably 90°, but these angles may also be set to 90°±α° (where α° is, for example, 45° or less).

[0013] As shown in Figure 3(a), when a lip channel steel or a channel steel is used as the base material 11, the outer surface of the web 11d is installed so that it becomes the mounting surface of the board material 2, and the plate surface of the web 11d and the surface 10f of the steel pipe 10 are positioned opposite each other at a distance, and the tip sides of the upper and lower flanges 11e, 11e are attached to the surface 10f of the steel pipe 10 by welding or the like. As shown in Figure 3(b), when angle iron is used as the base material 11, the plate surface of one web 11g and the surface 10f of the steel pipe 10 are installed facing each other at a distance so that the outer surface of one web 11g becomes the mounting surface of the board material 2, and the tip side of the other web 11h is attached to the surface 10f of the steel pipe 10 by welding or the like. As shown in Figure 3(c), when hat-shaped steel is used as a base material 11, the plate surface of the first flat plate portion 11a and the surface 10f of the steel pipe 10 are installed facing each other at a distance so that the outer surface of the first flat plate portion 11a becomes the mounting surface for the board material 2, and the edge sides of each second plate portion 11c, 11c are attached to the surface 10f of the steel pipe 10 by welding or the like. As shown in Figure 3(d), when an H-shaped steel beam is used as a base material 11, the plate surface of one flange 11i and the surface 10f of the steel pipe 10 are installed facing each other at a distance so that the outer surface of one flange 11i becomes the mounting surface of the board material 2, and both end edges of the other flange 11j are attached to the surface 10f of the steel pipe 10 by welding or the like.

[0014] Furthermore, the base material 11 may be constructed by attaching structural steel other than the above-mentioned structural steel (for example, cut CT (T-shaped steel), etc.) or long metallic material other than structural steel to the surface 10f of a column constructed from a steel pipe 10. In essence, the base material 11 can be any material that is arranged to extend in a direction along the outer periphery of the surface 10f of the steel pipe 10 that constitutes the column and functions as a base for screwing the board material 2.

[0015] The fire-resistant coated structure 1 constructed using a column 9 with a base material of embodiment 1 is composed of a column 9 with a base material, a fire-resistant material 4 provided on the surface 10f of the steel pipe 10 of the column 9 with a base material, and a board material 2 attached to the base material 11 so as to cover the surface 10f of the steel pipe 10 and the fire-resistant material 4.

[0016] The fire-resistant material 4 is made of, for example, a ceramic fiber-based, glass fiber-based, asbestos-based or other fire-resistant fiber material that is lightweight, flexible, and has excellent heat insulating and heat resistance properties. For example, by unrolling a roll of fire-resistant material 4 having a specified thickness and width and wrapping it around the surface 10f of the steel pipe 10 between the upper and lower circular base portions 11S, 11S of the base-equipped column 9, the work of providing the fire-resistant material 4 so as to cover the surface 10f of the steel pipe 10 that constitutes the column can be easily performed. For example, if a fire-resistant material roll is selected and used, in which fire-resistant material 4 is wound into a roll with a width corresponding to the dimension between the upper and lower circular base portions 11S, 11S of the base-equipped column 9, the fire-resistant material 4 can be unwound from the fire-resistant material roll to a length that can be wrapped around the surface 10f of the steel pipe 10, cut, and then wrapped around the surface 10f of the steel pipe 10, making it easy to provide the fire-resistant material 4 to cover the surface 10f of the steel pipe 10. As such, as the fire-resistant material roll (fire-resistant material 4) wound into a roll and commercialized, for example, "Isowool Blanket" (product name, manufactured by Isolite Industries Co., Ltd.) can be used. Furthermore, the fire-resistant material 4, which is attached by wrapping it around the surface 10f of the steel pipe 10 between the upper and lower circular base portions 11S, 11S of the base-equipped column 9, is preferably fixed to the surface 10f of the steel pipe 10 using, for example, a pin 3X described below.

[0017] In addition, the refractory material 4 is also provided between the surface 10 f of the steel pipe 10 and the base material 11 . For example, if the base material 11 is composed of a lip channel steel (see Figure 3(a)) or channel steel welded to the surface 10f of the steel pipe 10, the fire-resistant material 4 can be packed inside the lip channel steel or channel steel as well, and the fire-resistant material 4 can be provided between the lip channel steel or channel steel and the surface 10f of the steel pipe 10. Furthermore, if the base material 11 is composed of angle iron (see Figure 3(b)) welded to the surface 10f of the steel pipe 10, when providing the fire-resistant material 4 on the surface 10f of the steel pipe 10, the fire-resistant material 4 should also be provided between the angle iron and the surface 10f of the steel pipe 10. Furthermore, when the base material 11 is constructed of a hat-shaped steel (see Figure 3(c)) welded to the surface 10f of the steel pipe 10, the fire-resistant material 4 can be packed into the space surrounded by the first flat plate portion 11a of the hat-shaped steel and the connecting flat plate portions 11b, 11b, so that the fire-resistant material 4 is provided between the hat-shaped steel and the surface 10f of the steel pipe 10. Furthermore, when the base material 11 is constructed of an H-shaped steel (see Figure 3(d)) welded to the surface 10f of the steel pipe 10, when providing the fire-resistant material 4 on the surface 10f of the steel pipe 10, the fire-resistant material 4 should also be provided between the flanges 11i and 11j of the H-shaped steel.

[0018] Furthermore, since the circumferential base portion 11S provided on the column 9 with base material is configured so that the base material 11 is missing at the four corners of the steel pipe 10, if a lip channel steel, a channel steel, or a hat steel is used as the base material 11, the fire-resistant material 4 can be packed from the side inside each of the base materials 11, 11... that make up the circumferential base portion 11S, and the work of providing the fire-resistant material 4 between the surface 10f of the steel pipe 10 and the base material 11 can also be easily performed.

[0019] The board material 2 is a board material attached to a base material 11 so as to cover the surface 10f of the steel pipe 10 used as a pillar and the fire-resistant material 4, and is, for example, a wood board, a gypsum board, a calcium silicate board, or the like. The board material 2 is provided, for example, facing the surface 10f of the steel pipe 10 and covering each of the square surfaces (each side surface of the square pillar) 10f, 10f . . . of the steel pipe 10. The wood board used as the board material 2 is composed of a board made of, for example, CLT (Cross Laminated Timber), or laminated timber, or LVL (Laminated Veneer Lumber), or plywood, or solid wood, etc. The board material 2 may be a single sheet or a stack of multiple sheets. That is, the board material 2 provided on the outside of the fire-resistant covering structure may be a single sheet or multiple sheets.

[0020] Next, an example of a method for constructing a fire-resistant covered column as the fire-resistant covered structure 1 according to the first embodiment will be described. First, in a factory or on-site, the base material 11 is attached to the surface 10f of the steel pipe 10 by welding or the like, thereby producing a column 9 with the base material. Then, a fire-resistant covered column 1B is constructed on the column 9 with base material installed in a predetermined position as follows. That is, as described above, for example, the fire-resistant material 4 is unwound from a fire-resistant material roll and cut, and the cut fire-resistant material 4 is wrapped around the surface 10f of the steel pipe (column) 10 between the upper and lower circular base portions 11S, 11S of the column 9 with base material. Furthermore, the refractory material 4 is also provided between the surface 10 f of the steel pipe 10 and the base material 11 . Then, a board material 2 such as a wooden board is attached to the base material 11 using screws 3 as attachment materials so as to cover each of the square surfaces 10f, 10f... of the steel pipe 10 and the fire-resistant material 4. The screws 3 may be, for example, drill screws. In this case, as shown in Figure 2, each board material 2, 2... is attached to the base material 11 using screws 3 so that the end face of one adjacent board material 2 faces the plate surface on the end side of the other board material 2. 2, one adjacent board material 2 is joined to the other adjacent board material 2 by screwing a screw 3A as a mounting member from the outside of the plate surface on the end side of the other board material 2 so that the end face of one adjacent board material 2 and the plate surface on the end side of the other board material 2 are in surface contact and joined together. Note that a slim thread may be used as the screw 3A, for example. As a result of the above, a fire-resistant covered column 1 can be constructed as a fire-resistant covered structure using a column 9 with a base material.

[0021] According to the column 9 with base material of embodiment 1, the fire-resistant material 4 can be arranged by wrapping it around the outer periphery of the surface 10f of the steel pipe 10 that constitutes the column, so that when constructing a fire-resistant coated column 1 using the column 9 with base material, it is possible to provide a column 9 with base material that is easy to construct. In addition, since it is now possible to construct a fire-resistant coated column 1 using a column 9 with a base material that is easy to install, it is now possible to provide a fire-resistant coated column (fire-resistant coated structure) 1 that is easy to install when installing the fire-resistant coated column 1.

[0022] Embodiment 2 The fireproof material 4 provided between the surface 10f of the steel pipe 10 constituting the column and the base material 11 may be a hydraulic material such as mortar or an air-hardening material such as gypsum. For example, as shown in Figure 3(a), when a lip channel steel or a channel steel is used as the base material 11, the fire-resistant material 4 may be provided by filling the above-mentioned hydraulic or air-hardening material between the plate surface of the web 11d and the surface 10f of the steel pipe 10. Furthermore, as shown in Figure 3(b), when hat-shaped steel is used as the base material 11, the fire-resistant material 4 may be provided by filling the above-mentioned hydraulic or air-hardening material between the plate surface of the first flat plate portion 11a and the surface 10f of the steel pipe 10.

[0023] Embodiment 3 As shown in Figures 6 to 9, a fire-resistant coated beam 1A as a fire-resistant coated structure of embodiment 3 is composed of a base-attached beam 9A as a base-attached shaft material, a fire-resistant material 4, and a board material 2. 6 to 9, the same or corresponding parts as those described in FIGS. 1 to 5 of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The beam 9A with base material in embodiment 3 is composed of, for example, an H-shaped steel 10A as a metal shaft material used as a beam, and a base material 11A provided on the underside and side of the beam composed of the H-shaped steel 10A. The base material 11A forms a mounting surface for the board material 2, and is a member to which mounting materials such as screws 3 for mounting the board material 2 are attached. The base material 11A forms a mounting surface for the fire-resistant material 4, and is a member to which, for example, the tip portion 3Xt of a pin 3X, which serves as a mounting material for mounting the fire-resistant material 4, is welded and fixed.

[0024] As shown in Figure 7(a), the H-shaped steel 10A used as a beam is a long steel material formed with an H-shaped cross section, and is a structural steel comprising a web 10u and a pair of flanges 10fa, 10fb provided at both ends of the web 10u and facing each other.

[0025] As the base material 11A, for example, a hat-shaped steel, which is exemplified as the base material 11 described above, may be used. That is, as described above, it is only necessary to use a hat-shaped steel structured to include the first flat plate portion 11a, a pair of connecting flat plate portions 11b, 11b, and a pair of second flat plate portions 11c, 11c.

[0026] The base material 11A is provided on the surface side of the H-shaped steel 10A constituting the beam so as to extend in the circumferential direction around the material axis of the beam. As shown in Figures 7(a), 8(a), and 9, the beam 9A with base material is configured so that the base material 11 extends in a concave shape over the underside of the beam made of H-shaped steel 10A and both side portions of the beam. That is, the concave base portion 11U is formed by a lower base material 11A that is arranged to extend in the width direction (beam width direction) of the underside of the beam made up of H-shaped steel 10A, and side base materials 11A, 11A that are arranged to extend in the vertical direction (beam formation direction) of the side portions on both sides of the beam. The beam 9A with base material is configured by providing a plurality of the concave base portions 11U at predetermined intervals along the extension direction of the beam. That is, the lower base material 11A constituting the concave base portion 11U is provided so as to extend in the beam width direction on the lower surface 10Ab of the other flange 10fb of the H-shaped steel 10A constituting the lower surface of the beam. In addition, the side base materials 11A, 11A that constitute the concave base portion 11U are arranged to extend over the widthwise end face 10fc of one flange 10fa of the H-shaped steel 10A that constitutes the side of the beam and the widthwise end face 10fd of the other flange 10fb.

[0027] When a hat-shaped steel is used as the base material 11A, the pair of second flat plate portions 11c, 11c may be attached to the H-shaped steel 10A by welding or the like so that the surface of the first flat plate portion 11a becomes the mounting surface for the board material 2. That is, a pair of second flat plate portions 11c, 11c of the lower base material 11A are welded to the lower surface 10Ab of the other flange 10fb of the H-shaped steel 10A that constitutes the lower surface of the beam. In addition, a pair of second flat plate portions 11c, 11c of the side base materials 11A, 11A are welded to the widthwise end face 10fc of one flange 10fa of the H-shaped steel 10A that constitutes the side of the beam and the widthwise end face 10fd of the other flange 10fb.

[0028] Furthermore, when hat-shaped steel is used as the base material 11A, the lower base material 11A is one in which the second flat plate portions 11c, 11c at both longitudinal ends located below the lower ends of the side base materials 11A, 11A have been removed. In other words, the lower base material 11A is configured so that only the first flat plate portion 11a and a pair of connecting flat plate portions 11b, 11b remain at both longitudinal ends located below the lower ends of the side base materials 11, 11. When the lower base material 11A is welded to the underside 10Ab of the beam, it is attached so that the portions 11P, 11P remaining, consisting of only the first flat plate portion 11a at both longitudinal ends and the pair of connecting flat plate portions 11b, 11b, protrude outward beyond the widthwise end faces 10fd, 10fd of the other (lower) flange 10fb. Furthermore, the side base materials 11A, 11A are attached so that the first flat plate portion 11a and the pair of connecting flat plate portions 11b, 11b of the side base materials 11A, 11A are positioned on top of the portions 11P, 11P of the lower base material 11A attached in this manner (see Figure 8(a)).

[0029] As described above, a plurality of concave base portions 11U, 11U . . . are provided at predetermined intervals along the extension direction of the beam formed of the H-shaped steel 10A, thereby forming a beam 9A with a beam base material. According to this beam 9A with beam base material, the second flat plate portions 11c, 11c of the base material 11A below the boundary between the lower base material 11A and the side base materials 11A, 11A are not present (see Figure 8(a)). Therefore, as described below, when the fire-resistant material 4 is attached in a concave manner around the underside and side of the beam between the concave base portions 11U, 11U, it becomes possible to prevent the fire-resistant material 4 from protruding outside the first flat plate portion 11a of the side base materials 11A, 11A near the boundary between the lower base material 11A and the side base materials 11A, 11A. In other words, the fireproof material 4 can be fitted well on the underside and side of the beam between the concave base portions 11U, improving workability.

[0030] As shown in FIG. 8(b), the fireproof material 4 is provided so as to be wound in a concave shape around the underside and side of the beam between the concave base portions 11U. The fire-resistant material 4 wound in this manner has its side edge portion placed on the second flat plate portion 11c of the base material 11A and is fixedly attached to the second flat plate portion 11c by a pin 3X serving as an attachment material. As shown in FIG. 7(c), for example, the pin 3X penetrates the fireproof material 4 and the tip portion 3Xt is welded (ultrasonic welding) to the second flat plate portion 11c of the side base materials 11A, 11A. As such a pin 3X whose tip portion 3Xt is welded to the second flat plate portion 11c of the side base material 11A, for example, "AT Pin, Product Name, manufactured by Tilement Co., Ltd." can be used. That is, the second flat plate portion 11c of the base material 11A forms the mounting surface for the fire-resistant material 4, and also functions as a member to which the tip portion 3Xt of the pin 3X for mounting the fire-resistant material 4 is welded and fixed. The upper and lower ends of the refractory material 4 wound in a concave shape as described above may be fixed to the surface (flange or end face of the flange) of the H-shaped steel 10A by means of pins 3X.

[0031] When the H-shaped steel 10A is used as a beam, there is a space between one flange 10fa and the other flange 10fb. Therefore, simply wrapping the fire-resistant material 4 in a concave shape around the underside and sides of the beam between the concave base portions 11U and 11U may result in the fire-resistant material 4 getting into the space between one flange 10fa and the other flange 10fb, making it impossible to achieve the desired fire resistance performance. However, in embodiment 3, as described above, the side edge portion of the fire-resistant material 4 is placed on the second flat portion 11c of the side base material 11A and is fixedly attached to the second flat portion 11c by the pin 3X. Therefore, it is possible to prevent the fire-resistant material 4 from entering the space between the flange 10fa on one side and the flange 10fb on the other side, and it is possible to construct a fire-resistant covered beam 1A having the desired fire resistance performance.

[0032] In embodiment 3, for example, the fire-resistant material 4 wound in a roll and having a predetermined thickness and width can be unwound from the roll and attached in a concave manner to the underside and side of the beam between the concave base portions 11U of the beam 9A with base material, thereby making it possible to simply and easily install the fire-resistant material 4.

[0033] The fireproof material 4 is also filled into the space surrounded by the first flat plate portion 11 of the base material 11A and the pair of connecting flat plate portions 11b, 11b.

[0034] Next, an example of a method for constructing a fire-resistant covered beam 1A as a fire-resistant covered structure according to the third embodiment will be described. First, a beam 9A with a base material is manufactured in a factory or on-site. The fabricated beams 9A with base material are installed so as to span between the columns or beams. After that, a formwork for pouring the floor slab (not shown) is installed, and the floor slab F is constructed on the beams 9A with base material (see Figure 6). Furthermore, after the H-shaped steel 10A to be used as a beam is installed so as to span between columns or beams, a formwork for pouring a floor slab (not shown) is installed, and a floor slab F is constructed on the beam 9A with base material, and then the base material 11A is welded to the H-shaped steel 10A to produce the beam 9A with base material. Then, the fire-resistant coated beam 1A is constructed as follows. As described above, the fire-resistant material 4 is unwound from the fire-resistant material roll and cut, and the cut fire-resistant material 4 is installed in a concave shape around the underside and side of the beam between the concave base portions 11U of the base material-attached beam 9A. Then, the side edge portions of the fire-resistant material 4 are fixed to the second flat plate portions 11c of the base materials 11A, 11A on the sides using pins 3X. The fireproof material 4 is also filled into the space surrounded by the first flat plate portion 11 of the base material 11A and the pair of connecting flat plate portions 11b, 11b. Then, the lower board material 2 is attached to the first flat plate portion 11a of the lower base material 11 using screws 3 so as to cover the underside of the base material-attached beam 9A and the fireproof material 4. Furthermore, side board materials 2 are attached to the first flat plate portions 11a of the side base materials 11 using screws 3 so as to cover the side portions of the base material-attached beams 9A and the fireproof materials 4. In this case, as shown in Figure 7(a), each board material 2, 2... is attached to the base material 11 using screws 3 so that the end face of the lower board material 2 faces the plate surface on the end side of the side board material 2. Then, as shown in Figure 7(a), adjacent lower board material 2 and side board material 2 are joined by screwing screws 3A as mounting materials from the outside of the plate surface on the end side of the side board material 2 so that the end face of the lower board material 2 and the plate surface on the end side of the side board material 2 are in surface contact and joined. As a result of the above, a fire-resistant coated beam 1A can be constructed as a fire-resistant coated structure using a beam 9 with a base material.

[0035] According to the beam 9A with base material of embodiment 3, the fire-resistant material 4 can be arranged in a concave manner around the underside and sides of the beam made of H-shaped steel 10A, so that when constructing a fire-resistant coated beam 1A using the beam 9A with base material, it is possible to provide a beam 9A with base material that is easy to construct. In addition, since it is now possible to construct a fire-resistant coated beam 1A using a beam 9A with a base material that is easy to install, it is now possible to provide a fire-resistant coated beam (fire-resistant coated structure) 1A that is easy to install when installing the fire-resistant coated beam 1A.

[0036] Embodiment 4 As shown in FIGS. 10 and 11, a fire-resistant covered column 1B as a fire-resistant covered structure according to the fourth embodiment is configured to include a column 9B with a base material, a fire-resistant material 4, and a board material 2. The column 9B with base material according to the fourth embodiment is configured to include, for example, an H-shaped steel 10B as a metal shaft material used as a column, and a base material 11B provided on the surface of the H-shaped steel 10B. 10 and 11, the same or corresponding parts as those described in FIGS. 6 to 9 of the second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0037] The H-shaped steel 10B used as a column is a long steel material formed with an H-shaped cross section, similar to the H-shaped steel 10A described in embodiment 2, and is a structural steel comprising a web 10u and a pair of flanges 10fa, 10fb provided at both ends of the web 10u and facing each other.

[0038] As the base material 11B, a hat-shaped steel may be used that is configured to have a first flat plate portion 11a, a pair of connecting flat plate portions 11b, 11b, and a pair of second flat plate portions 11c, 11c, similar to the base material 11A described in embodiment 2. In other words, the base material 11B is a member that forms the mounting surface of the board material 2 and to which mounting materials such as screws 3 for mounting the board material 2 are attached, and is also a member that forms the mounting surface of the fire-resistant material 4 and to which the tip 3Xt of a pin 3X, for example, as a mounting material for mounting the fire-resistant material 4, is welded and fixed.

[0039] The base material 11B is provided on the surface side of the H-shaped steel 10B constituting the column so as to extend in the circumferential direction around the material axis of the column. That is, as shown in Figure 11(a), the column 9B with base material has four base materials 11B, 11B... on the left, right, front and back, which are arranged to extend in the left-right direction (horizontal direction) or the front-to-back direction (horizontal direction) on each side of the column formed from H-shaped steel 10B. The four base materials 11B, 11B . . . on the left, right, front and rear constitute a circumferential base portion 11R that goes around the periphery of the pillar. That is, the base-attached pillar 9B is configured by providing a plurality of circumferential base portions 11R at predetermined intervals along the vertical direction of the pillar.

[0040] When a hat-shaped steel is used as the base material 11B, the pair of second flat plate portions 11c, 11c are attached to the H-shaped steel 10B by welding or the like so that the surface of the first flat plate portion 11a becomes the mounting surface for the board material 2. In this case, as shown in FIG. 11, the left and right base materials 11B, 11B have the same configuration as the lower base material 11A described in the second embodiment, for example. That is, the left and right base materials 11B, 11B have a configuration including portions 11P, 11P at both ends in the longitudinal direction, which are the first flat plate portion 11a and the pair of connecting flat plate portions 11b, 11b remaining.

[0041] As shown in FIG. 11(a), the left base material 11B has a pair of second flat plate portions 11c, 11c welded to the outer surface of one flange 10fa of an H-shaped steel 10B that forms the left side surface of the column. At this time, the left base material 11B is attached so that the portions 11P, 11P protrude outward beyond the width direction end faces 10fc, 10fc of one flange 10f. Similarly, the right base material 11B has a pair of second flat plate portions 11c, 11c welded to the outer surface of the other flange 10fb of the H-shaped steel 10B that forms the right side surface of the column. At this time, the right base material 11B is attached so that the portions 11P, 11P protrude outward beyond the widthwise end faces 10fd, 10fd of the other flange 10fb.

[0042] The front base material 11B is installed so as to span one end face 10fc of one flange 10fa of the H-shaped steel 10B that constitutes the front side of the column and one end face 10fd of the other flange 10fb, and a pair of second flat plate portions 11c, 11c are welded to the end faces 10fc, 10fd of each flange 10fa, 10fb. At this time, both ends of the front base material 11B are attached so as to match with the portions 11P of the left and right base materials 11A. Similarly, the rear base material 11B is installed so as to span the other end face 10fc of one flange 10fa of the H-shaped steel 10B that forms the rear side of the column and the other end face 10fd of the other flange 10fb, and a pair of second flat plate portions 11c, 11c are welded to the end faces 10fc, 10fd of each flange 10fa, 10fb. At this time, both ends of the rear base material 11B are attached so as to match with the portions 11P of the left and right base materials 11A.

[0043] As shown in Figures 10 and 11(b), the fire-resistant material 4 is arranged so as to be wrapped around the column between two circumferential base portions 11R arranged at a predetermined interval along the vertical direction of the column made of H-shaped steel 10B. For example, as shown in Fig. 11(b), the fire-resistant material 4 is wound starting from the winding start end 4S so that the winding end 4G reaches the winding start end 4S. In other words, the fire-resistant material 4 is wound around the column made of H-shaped steel 10B in a circular motion. The fire-resistant material 4 wound in this manner has its upper edge placed on the second flat plate portion 11c of the upper circumferential base portion 11R, and its lower edge placed on the second flat plate portion 11c of the lower circumferential base portion 11R. Then, the pin 3X is penetrated into the fire-resistant material 4, and the tip portion 3Xt of the pin 3X is welded (ultrasonic welding) w to the second flat portion 11c of the base material 11A, thereby fixedly attaching the fire-resistant material 4 to the second flat portion 11c. The refractory material 4 wound as described above may be fixed to the surface (flange or end face of the flange) of the H-shaped steel 10B by means of a pin 3X.

[0044] In embodiment 4, as in embodiment 1, the fire-resistant material 4 wound in a roll and having a specified thickness and width is unwound from the roll and attached by wrapping it around the column between the circumferential base portion 11R of the base-equipped column 9B, making it possible to easily install the fire-resistant material 4.

[0045] Next, an example of a method for constructing a fire-resistant covered column as the fire-resistant covered structure 1 according to the fourth embodiment will be described. First, the pillar 9B with the base material is manufactured in a factory or on-site. Then, a fire-resistant covered column 1B is constructed on the column 9B with base material installed in a predetermined position as follows. As described above, for example, the fireproof material 4 is unwound from a fireproof material roll and cut, and the cut fireproof material 4 is wrapped around the column between the upper and lower circumferential base portions 11R, 11R of the base-attached column 9B. Furthermore, the fireproof material 4 is also provided in the space surrounded by the first flat plate portion 11 of the base material 11B and the pair of connecting flat plate portions 11b, 11b. Then, the left and right board materials 2 are attached to the first flat plate portions 11a of the left and right base materials 11 using screws 3 so as to cover the left and right side surfaces (outer surfaces of each flange 10fa, 10fb) of the base-equipped column 9B and the fire-resistant material 4. Furthermore, front and rear board materials 2 are attached to the first flat plate portions 11a of the front and rear base materials 11 using screws 3 so as to cover the front and rear side portions of the base-attached column 9B and the fire-resistant material 4. In this case, as shown in Figure 11(a), each board material 2, 2... is attached to the base material 11 using screws 3 so that the end faces of the left and right board materials 2 face the plate surfaces on the end sides of the front and rear board materials 2. Then, as shown in Figure 11(a), adjacent board materials 2, 2 are joined together by screwing screws 3A as mounting materials from the outside of the plate surfaces on the end sides of the front and rear board materials 2 so that the end faces of the left and right board materials 2 and the plate surfaces on the end sides of the front and rear board materials 2 are in surface contact and joined. As a result of the above, a fire-resistant covered column 1B can be constructed as a fire-resistant covered structure using a column 9B with a base material.

[0046] According to the column 9B with base material of embodiment 4, the fire-resistant material 4 can be arranged by wrapping it around the outer periphery of the H-shaped steel 10B that constitutes the column, so that when constructing a fire-resistant coated column 1B using the column 9B with base material, it is possible to provide a column 9B with base material that is easy to construct. In addition, since it is now possible to construct a fire-resistant coated column 1B using a column 9B with a base material that is easy to install, it is now possible to provide a fire-resistant coated column (fire-resistant coated structure) 1 that is easy to install when installing the fire-resistant coated column 1B.

[0047] Embodiment 5 In embodiment 3, examples are given of a beam 9A with base material, which is composed of an H-shaped steel 10A used as a beam and a base material 11A provided on the underside and side of the beam made of the H-shaped steel 10A, and a fire-resistant coated beam 1A using the beam 9A with base material. That is, examples are shown of a beam 9A with base material, which is made of H-shaped steel 10A and has base material 11A on the underside and three sides of the beam, and a fire-resistant coated beam 1A, which is made by providing fire-resistant coating on the underside and three sides of the beam 9A with base material. However, for example, in buildings with an open ceiling structure, a fire-resistant coated beam may be constructed in which fire-resistant coating is provided on four surfaces of the beam made of H-shaped steel: the bottom surface, both sides, and the top surface. When constructing the fire-resistant coated beam, a beam with a base material may be used that has the same configuration as the base material-equipped column 9B described in the fourth embodiment.

[0048] In other words, in the shaft member with base material of the present invention, if the shaft member is a steel pipe used as a pillar, the base material may be configured to extend in a direction along the outer periphery of the pillar. Furthermore, in the shaft member with base material according to the present invention, if the shaft member is an H-shaped steel beam used as a beam, the base material may be configured to extend across the widthwise end face of one flange that forms the side of the beam and the widthwise end face of the other flange, and to extend in the width direction of the beam on the underside of the other flange that forms the underside of the beam. Furthermore, in the shaft member with base material according to the present invention, when the shaft member is an H-shaped steel beam used as a pillar or beam, the base material may be configured to extend in a direction along the outer periphery of the pillar or beam.

[0049] Furthermore, in the fire-resistant coated structure according to the present invention, when the shaft material is a steel pipe used as a column or an H-shaped steel used as a column or beam, the fire-resistant material may be configured to be wrapped around the outer periphery of the surface of the column or beam. Furthermore, in the fire-resistant coated structure of the present invention, if the shaft material is an H-shaped steel beam used as a beam, the fire-resistant material may be configured to extend circumferentially around the beam axis and cover one side of the beam, the underside of the beam, and the other side of the beam.

[0050] In addition, in embodiments 3, 4, and 5, it is preferable to use, as the base materials 11A and 11B, a configuration such as the hat-shaped steel described above, which has a first flat portion 11a for attaching the board material 2 and a second flat portion 11c to which the tip of the pin 3X is welded, but it is also possible to use a long metallic material other than the hat-shaped steel. For example, a base material may be an H-shaped steel beam, in which one flange functions as a flat plate for attaching the board material 2 and the side edge of the wrapped fire-resistant material 4 can be sandwiched between the pair of flanges.

[0051] That is, in the fire-resistant coated structure of the present invention, it is preferable to use pins 3X to attach the fire-resistant material 4 in a fixed state to the shaft material or base material, but the fire-resistant material 4 does not have to be fixed to the shaft material or base material.

[0052] In the third, fourth and fifth embodiments, an I-beam may be used instead of the H-beams 10A and 10B.

[0053] Furthermore, when a wood board is used as the board material 2 described above, a wood board having a certain thickness or more will carbonize and burn slowly when heated, suppressing heat input and temperature rise inside, thereby contributing to improving the fire resistance of the component. The carbonization rate of the wood board after ignition is approximately 0.6 to 0.8 mm per minute for coniferous wood, so the fire-resistant material for the shaft can be designed rationally by taking into account the thickness of the wood board and the fire-resistant effect of carbonization. Furthermore, when wood boards are used to achieve a certain level of fire resistance, it is not preferable to arrange the wood boards in small pieces or if there are cracks in the wood boards, as this will create gaps within the surface of the wood boards. Therefore, if there is concern about cracking of the wood, it is desirable to use large-sized panels with cross-laminated layers, such as CLT or plywood. [Explanation of symbols]

[0054] 1 Fireproof coated column (Fireproof coated structure), 1A Fireproof coated beam (Fireproof coated structure), 1B Fireproof covering column (fireproof covering structure), 2 board material, 4 fireproof material, 9 Column with base material (shaft with base material), 9A Beam with base material (shaft with base material), 9B Column with base material (shaft with base material), 10 Steel pipe (shaft), 10A H-shaped steel (shaft material), 10B H-shaped steel (shaft material), 10fa one flange, 10fb other flange, 11,11A,11B base material.

Claims

1. A shaft member with a base material, comprising a metal shaft member and a base material provided on the surface of the shaft member, A shaft member with a base material, characterized in that the base material is provided on the surface side of the shaft member so as to extend in a circumferential direction centered on the shaft axis of the shaft member.

2. The shaft is a steel pipe used as a pillar.

2. The shaft member with base material according to claim 1, wherein the base material is provided so as to extend in a direction along the outer periphery of the pillar.

3. The shaft is an H-shaped steel beam, A shaft member with base material as described in claim 1, characterized in that the base material is arranged to extend across the widthwise end face of one flange that constitutes the side portion of the beam and the widthwise end face of the other flange, and is arranged to extend in the width direction of the beam on the underside of the other flange that constitutes the underside of the beam.

4. The shaft is an H-shaped steel used as a column or beam, 2. A shaft member with base material according to claim 1, characterized in that the base material is provided so as to extend in a direction along the outer periphery of the pillar or beam.

5. 2. A shaft member with a base material according to claim 1, wherein the base material is formed by a steel section attached to the surface of the shaft member.

6. A fire-resistant coated structure comprising a shaft member with a base material as described in any one of claims 1 to 5, a fire-resistant material provided on the surface of the shaft member, and a board material attached to the base material so as to cover the surface of the shaft member and the fire-resistant material.

7. The shaft material is a steel pipe used as a column or an H-shaped steel used as a column or beam.

7. The fire-resistant covered structure according to claim 6, wherein the fire-resistant material is provided by wrapping it around the outer periphery of the surface of the column or beam.

8. The shaft is an H-shaped steel beam, The fire-resistant coated structure according to claim 6, characterized in that the fire-resistant material extends circumferentially around the material axis of the beam so as to cover one side of the beam, the underside of the beam, and the other side of the beam.

9. 7. The fire-resistant covered structure according to claim 6, wherein a fire-resistant material is provided between the surface of the shaft material and the base material.

10. 7. The fire-resistant coated structure according to claim 6, wherein the board material is a wood board, a gypsum board, or a calcium silicate board.

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