JP4907809B2 - Fireproof coating structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fireproof covering structure applied to a member having a circular cross section such as a steel round column or a concrete-filled steel pipe.
[0002]
[Prior art]
Conventionally, as a fireproof coating structure for steel round columns or concrete-filled steel pipes, a fireproof coating material is sprayed or painted on the outer peripheral surface of the column , and then a steel base material is incorporated on the outside, and an upper board is attached thereto. There is a structure in which a base material made of steel or an inorganic refractory material is attached to the outer peripheral surface of the column, and a fireproof coating material having an arc-shaped cross section is fixed to the base material concentrically.
[0003]
In the latter fireproofing structure, generally, the refractory coating material, the base material such as lightweight trench steel which is welded to the outer peripheral surface of the pillar, and is fixed with the tapping screw. Specific examples are shown below.
[0004]
JP-A-11-193580, the outer periphery of the steel round column or concrete filled steel tube, the spacer comprising a refractory inorganic molded body was fixed by the adhesive, constitutes a base material by bonding a steel sheet on the surface of the spacer A technique relating to a fireproof coating structure is disclosed in which a fireproof coating material having a circular cross section is fixed to the base material with a tapping screw.
[0005]
Japanese Utility Model Laid-Open No. 07-6312 discloses a cylindrical fireproof covering portion in a steel round pillar fireproof covering structure that surrounds a steel round pillar constituting a framework of a building with a cylindrical fireproof covering portion. Is assembled from the arc-shaped fireproof covering material so that the vertical seam is aligned, and in the circumferential space between the steel round column and the cylindrical fireproof covering portion, the vertical direction of the cylindrical fireproof covering portion is A lightweight grooved steel is installed along the seam of the steel round column, and each end of the arc-shaped fireproof covering material constituting the cylindrical fireproof covering portion is fixed to the lightweight grooved steel with a tapping screw. Techniques relating to fireproof coating structures are disclosed.
[0006]
Further, Japanese Utility Model Laid-Open No. 07-10123 has a one-stage or multi-stage cylindrical fireproof covering portion covering the periphery of a steel round column with a gap, and each stage of the fireproof covering portion forms a cylinder. as to a plurality of arc-shaped fireproof coating materials, which are connected via a seam, each seam of the back side of the fireproofing material forming the cylinder, a plate-shaped metallic material which is disposed to cross the seam, the It is assembled integrally from a tapping screw that attaches and fixes a plate-shaped hardware to each of the fireproof coating materials. The back surface is bonded to the outer periphery of the steel round column between the steel round column and the cylindrical fireproof coating, and the surface is the plate. the spacing block in contact with Jo hardware (spacer) is Ru Tei arranged in each plate-like hardware, technology has been disclosed regarding fire protection structure of steel round column.
[0007]
[Problems to be solved by the invention]
However, each of the conventional techniques described above has the following problems. That is, in the fire protection structure for a conventional steel round column and concrete filled steel tube, after spraying or鏝塗Ri refractory coating material, when the structure for mounting the overlay board incorporates a steel base material on the outside thereof, steel requires a large space for mounting the manufactured base material, posts with the effective floor area of the room is less thickened, because its construction is a combination of a wet method and a dry method, and it takes time to work It was. In addition, in the case of a fireproof coating structure in which a base material such as lightweight grooved steel is attached to the outer peripheral surface of the column and an arc-shaped fireproof coating material is concentrically fixed to the base material, experts in welding the steel base material In addition, a curing treatment for sparks generated during welding work is required, and there is a problem in its workability.
[0008]
Further, in the fireproof coating structure disclosed in JP-A-11-193580, it is necessary to fix the spacer and the steel plate by bonding. Therefore, the steel material is bonded to the surface until the adhesive used for fixing the spacer is cured. In many cases, the operation is complicated.
[0009]
Further, in the structure of Japanese Utility Model Laid-Open No. 7-6312, the fireproof coating material is fixed by screwing a tapping screw. Therefore, in order to prevent warping of the light-weight grooved steel as the base material, silicic acid is provided for each screwed portion. The calcium packing material (spacer) needs to be accurately arranged, and the fixing work of the fireproof coating material is complicated, and there is a problem in its workability.
[0010]
Furthermore, in the fireproof covering structure disclosed in Japanese Utility Model Laid-Open No. 07-10123, when a tapping screw is screwed from the surface, there is no base material on the back side of the plate-like metal at this screwing position, so that the plate-like metal is raised. In some cases, it is difficult to firmly connect the fireproof coating materials.
[0011]
The present invention has been made in view of the conventional problems as described above, and an object of the present invention is to provide a fireproof covering structure that is easy to mount spacers and has good workability.
[0012]
[Means for Solving the Problems]
To achieve the above object, the present invention is to circular in cross-section member such as a steel round column and concrete filled steel tube, and a plurality of spacers which are arranged spaced from one another on its periphery, these spacers the member In order to fix to , in the fireproof covering structure which consists of the band which is wound around the outside of the spacer and the plural fireproof covering materials which are arranged outside this band , the spacer has a U-shaped cross section or It consists of a U-shaped steel material and an inorganic refractory material that is partially pushed into the U-shaped part or U-shaped part of the steel material and engages with the steel material, and is arranged so that the steel material does not contact the outer periphery of the member A fireproof covering structure is provided.
Preferably, the fireproof coating material is fixed at a position where the band and the spacer intersect. Further preferably, the joint between the fireproof coating and the fireproof coating is located on the band or the spacer. Moreover, you may make it the said band consist of a metal plate, an inorganic fiber cloth, or a nonwoven fabric. Further, the heat insulating layer may be between the air layer or inorganic fiber filler layer.
[0013]
Here, the fireproof covering structure of the present invention is particularly applied to a steel round column which is a circular steel tube column having a hollow inside, and a concrete-filled steel tube column in which concrete is filled in the steel tube. However, the present invention is not limited to such a member, and can be widely applied as long as the member has a circular cross section.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, in order to describe the fireproof covering structure according to the embodiment of the present invention with reference to the accompanying drawings, first, with respect to a member having a circular cross section such as a steel round column or a concrete-filled steel pipe, the outer periphery thereof is spaced apart from each other. A plurality of spacers made of inorganic refractory material arranged, a band wound around the spacer to fix the spacers to the member, and a plurality of fireproof coatings arranged outside the band A fireproof covering structure made of materials will be described for reference.
[0015]
Reference example .
As shown in FIG. 1 to FIG. 3, the fireproof covering structure has a plurality of spacers 14 made of an inorganic refractory material on the outer periphery thereof in order to form a heat insulating layer 12 on a steel circular column 10 which is a member having a circular cross section. Further, a band 16 is wound around the spacers 14 to fix the spacers 14, and a fireproof covering 18 is disposed outside the bands 16. It is what.
[0016]
In this reference example, the spacer 14 is four provided, each spacer 14 is ing an inorganic refractory material, cross-section is substantially rectangular columnar member. More specifically, the surface of each spacer 14 in contact with the steel round column 10 may be slightly curved corresponding to the curvature of the outer circumferential surface of the steel round column 10, and the thickness of the spacer 14 in the outer circumferential direction. The range is not particularly limited, but is about 10 to 100 mm. The inorganic refractory material, calcium silicate-based, gypsum based, cement molded plate or molded body thereof, and the like their these fiber-reinforced products.
[0017]
The band 16 wound so as to surround the four spacers 14 is a band-shaped member made of a metal plate such as a steel plate, a galvanized steel plate, or a stainless steel plate, or an inorganic fiber cloth such as a glass cloth or a ceramic cloth, or a nonwoven fabric. Further, the band after wound, for example, screws, staples, rivets, pins, buckles, Ru is fixed by wire or the like.
[0018]
The fireproof covering 18 disposed around the band 16 is made of a fireproof molding material such as a molded plate made of calcium silicate or a gypsum-based molded plate. Moreover, fire protection material 18 is divided into two types, a wall-like member, each cross-section is curved in a semicircular arc shape.
[0019]
Next, construction of the fireproof coating structure having the above configuration will be described. First, four spacers 14 are disposed on the outer periphery of the steel round column 10. Each spacer 14 is disposed so that extending substantially along the longitudinal direction of the steel round column 10. The four spacers 14, spaced from each other in the circumferential direction of the steel round column, the spacing is arranged at regular intervals (equal angles) der so that. Next, the band 16 is wound around the spacers 14. Since the four spacers 14 are fixed to the steel round column or the concrete-filled steel pipe 10 at a time just by winding the band 16, the spacers can be easily attached and the workability is very good as compared with the conventional case. Yes. That is , since the final fixing of the spacer 14 is not performed by the adhesive but by the band , it is not necessary to wait for the next operation until the adhesive is cured as in the conventional case, and the construction work is not complicated. .
[0020]
Next, a plurality of fireproof covering materials 18 are arranged so as to cover the outer peripheral surface of the steel round column 10 to which the spacer 14 and the band 16 are attached as described above. At this time, as joint 18a between the longitudinal fireproofing material 18 and the refractory coating material 18 of a refractory steel round column 10 is located on the spacer 14, also the circumferential direction of the fire protection material 18 of steel round column 10 joints 18b between the covering material 18 so as to be positioned above the band 16, performs the arrangement of the refractory coating material 18. Thereby, since the spacer 14 or the band 16 will be arrange | positioned in all the joint back surfaces of the some fireproof covering material 18, fireproof performance can be improved. Moreover, the heat insulation layer 12 is formed between the fireproof coating material 18 and the steel round column 10 by disposing the fireproof coating material 18 outside the spacer 14. When the placement of the fireproof coating material 18 is completed, the fireproof coating material 18 is fixed by a plurality of tapping screws 20. The position where the tapping screw 20 is driven is a position where the band 16 and the spacer 14 intersect with each other, so that each tapping screw 20 is engaged with both the band 16 and the spacer 14. Accordingly, the tapping screw 20 is driven into the spacer 14 to prevent the fireproof coating material 18 from being dented or distorted, so that a predetermined interval can be maintained between the steel column 10 and the fireproof coating. The covering material 18 can be firmly attached. Further, since the tapping screw 20 is screwed into the spacer 1 through band 16 rigid, self-tapping screws 20 are suitably restrained by screwing 4 to the band 16, the fireproofing material 18 can firmly attach it. Moreover, since the band 16 extends in the circumferential direction of the steel round column 10 and the spacer 14 extends in the longitudinal direction of the steel round column 10, the position where the band 16 and the spacer 14 intersect can be easily confirmed from the outside. Improved.
[0021]
Thus, the band 16 is not only a function of fixing a plurality of spacers 14 at a time, because it has a function to firmly restrain the tapping screws 20 as described above, while being easy mounting operation of the spacer 14, the refractory coating material 18 can be attached firmly, further only the necessary components for conventional manner screw constrained (e.g., steel, lightweight grooved steel plate fittings, etc.) it is not necessary to prepare a number of parts And the number of construction processes can be reduced.
[0022]
Embodiment.
Next, the fireproof covering structure according to the embodiment of the present invention will be described with reference to FIG. Engagement fireproofing structure according to the embodiment, the fire protection structure of the reference example described above, by pushing a part of the outer periphery of the inorganic refractory material 15 on the inside of the U-shaped portion of the cross-sectional U-shape steel 22 The spacer 14 is arranged. Steel 22 arranged on screwing side of the tapping screws 20 of each spacer 14, and, when the spacer 14 is fixed to the outer periphery of the steel round column 10, are arranged such steel 22 does not contact the steel round column 10 It is what. Steel 22, steel plate, galvanized steel plate, a metal plate of stainless steel plate or the like, the or what cross section is machined molded into a U-shape, or a commercially available steel. Further, the engagement between the steel 22 and an inorganic refractory material 15 in the spacer 14, the write Murrell so scissors are inorganic refractory material 15 on the inside of the cross section U-section without using an adhesive, the inorganic refractory material 15 steel This is easily done by pushing it into 22. In fire protection structure according to the preferred embodiment of a present invention, as in the case of the reference example, is fixed at one time a plurality of spacers 14 by a band 16, by screwing to the band 16, tapping screws 20 are to be firmly bound, yet easy mounting operation of the spacer 14, Ru can be attached refractory dressing firmly. Further, since the engagement between the steel 22 and an inorganic refractory material 15 are those that do not use the adhesive as described above, it is not necessary to wait for the next task until the adhesive as in the prior art to cure. Therefore, the attachment work of the spacer 14 is not hindered. Furthermore, since the tapping screw 20 is also restrained by screwing to the steel material 22 , the tapping screw 20 and the fireproof covering material 18 can be held more firmly.
[0023]
The cross-sectional shape of the steel material is not limited to the U-shape as shown in FIGS. 4 and 5A , and the tip is slightly inside as shown in FIG. 5B. bent or U-shape, the like shown by such a U-shape in (c) of FIG. 5, a portion of the inorganic refractory material is pushed inside the U-section or U-section steel, it is sandwiched Any shape may be used as long as the inorganic refractory material and the steel material are engaged with each other .
[0024]
Other embodiments.
The present invention is not limited to the above-described embodiment, and can be implemented with the following modifications, for example. That is , in the above embodiment, the heat insulating layer 12 formed between the steel round column 10 and the fireproof coating material 18 was an air layer, but is not limited thereto, and the heat insulating layer 12 has rock wool, glass wool, An inorganic fiber heat insulating material such as ceramic wool may be filled. In this case, the thickness (outer diameter) of the entire fireproof coating structure can be reduced. Further, the fireproof coating material is not limited to the semicircular arc-shaped two-divided type, and can be implemented by a type of three or more segments formed in a fan shape. Furthermore, although it is preferable that the fireproof covering material 18 is equally divided, it is not particularly limited.
[0025]
Further, the number, shape, and arrangement of the spacers 14 are not limited to the above embodiment. For example , the number of the spacers 14 may be less than three or five or more at the same height. The spacer 14 is not limited to the longitudinal direction of the circular cross section of the member 10 such as a steel round column, concrete filled steel tube is continuously rolled beauty, as shown in FIG. 6, a circular cross section of the member A mode in which a plurality of spacers 114 separated in the longitudinal direction of 10 may be arranged. Further, as shown in FIG. 7, a plurality of spacers 224 including a pair of spacer pieces 224 a and 224 b adjacent to each other in the circumferential direction of the member 10 may be arranged.
[0026]
【Effect of the invention】
As described above, according to the fire protection structure of the present invention, since the only winding the band performed last fixed spacers, as compared with the prior is easy mounting operation of the spacer workability is very good When both the fire protection material can be held firmly.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a fireproof coating structure which is a reference example of the present invention.
FIG. 2 is a view showing the vicinity of a joint of the fireproof covering material in FIG. 1;
FIG. 3 is a perspective view of a fireproof coating structure which is a reference example of the present invention.
FIG. 4 is a view similar to the reference example of FIG. 2 regarding the fireproof covering structure according to the embodiment of the present invention.
FIG. 5 is a diagram showing variations of steel materials for the fireproof covering structure according to the embodiment of the present invention.
FIG. 6 is a view showing variations of spacers in the fireproof coating structure according to the embodiment of the present invention.
FIG. 7 is a view showing variations of spacers in the fireproof covering structure according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Member with circular cross section (steel round column) , 12 ... Heat insulation layer, 14 ... Spacer, 15 ... Inorganic fireproof material (spacer), 16 ... Band, 18 ... Fireproof covering material, 18a, 18b ... Joint, 20 ... Tapping screw , 22 ... Steel (spacer).

Claims (5)

To circular in cross-section member such as a steel round column and concrete filled steel tube, and a plurality of spacers which are arranged spaced from one another on the outer circumference of its, these spacers for fixing to the member, around the outside of the spacer a wound in which the band, the fireproof covering structure comprising a plurality of refractory dressing Ru Tei is located outside of the band, the spacer, steel and U of the steel cross-sectional U-shape or U-shape A fireproof coating structure comprising an inorganic refractory material that is partly pushed into the inside of the part or U-shaped part and engaged with the steel material, and is arranged so that the steel material does not contact the outer periphery of the member . The fireproof covering structure according to claim 1, wherein the fireproof covering material is fixed at a position where the band and the spacer intersect . The fireproof coating structure according to claim 1 or 2 , wherein a joint between the fireproof coating material and the fireproof coating material is located on the band or the spacer . The fireproof covering structure according to any one of claims 1 to 3 , wherein the band is made of a metal plate, an inorganic fiber cloth, or a nonwoven fabric . The heat insulation layer which consists of an air layer or an inorganic fiber filling layer is formed between the outer periphery of the said member with a circular cross section, and a fireproof coating material, It is any one of Claim 1 thru | or 4 characterized by the above-mentioned. Fireproof coating structure.

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