JP3541065B2 - Fireproof coating method and structure of steel - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a fireproof coating method for a steel material used for a building, in particular, a steel column or a steel pipe column, and a fireproof coating structure thereof.
[0002]
[Prior art]
2. Description of the Related Art In recent years, as a method of fire-resistant coating the outer peripheral surfaces of steel materials, particularly steel columns and steel pipe columns, a dry construction method of covering the outer peripheral surfaces of the columns with a plate-shaped refractory material of a predetermined size over the outer periphery has been adopted.
In this dry method, a large number of mounting brackets having a centering surface are fixed to each outer surface forming the outer peripheral surface of the pillar by welding, and a plate-like refractory material is applied to the large number of centering surfaces. Abut on the outer surface of the refractory material and fix it at the abutment with screws etc., or contact a strip-shaped steel base material in the longitudinal direction of the pillar with many centering surfaces and fix it to the metal fitting by welding Then, the refractory material is fixed by a similar method.
[0003]
[Problems to be solved by the invention]
However, in such a construction method, since a plate-like refractory material is not directly attached to the outer surface of the column, the construction efficiency is reduced. In other words, welding work for fixing a large number of mounting brackets to the outer peripheral surface of the pillar and work for fixing it to the refractory material necessitate an increase in the number of work steps, and in welding work, centering is required. Therefore, it has a skill and it is difficult to fix the refractory material because it requires blinds such as screws.
Furthermore, especially when a strip-shaped steel base material is installed, more space is occupied than necessary between the outer surface of the pillar and the refractory material, and as a result, the pillar becomes thicker and the effective floor area in the room decreases. There's a problem.
In view of the above problems, an object of the present invention is to provide a refractory coating method for a steel material capable of securing a desired space between the outer surface of the steel material and the refractory material while simplifying the construction and reducing the number of steps. And a refractory coating structure.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, in the fire-resistant coating method and the fire-resistant coating structure of the first invention of the present invention,
Along with the longitudinal direction of the steel material, a refractory face material of a predetermined size is directly bonded to at least a part of the outer surface of the steel material via an adhesive, and an outer periphery of the steel material is surrounded by the fire resistant face material. Meanwhile, the entire outer surface is covered.
Further, the adhesive is a massive adhesive, and the massive adhesive is spotted on the outer surface of the steel material, and the fire resistant face material is pressed against the adhesive while the face material is pressed. Is preferably adjusted.
Further, it is preferable that the adhesive has an adhesive property to at least one of the steel material and the fire-resistant face material, and to fix face materials adjacent in the outer peripheral direction of the steel material at joints. At this time, the adhesive is a gypsum-based material, and the face material is preferably made of a gypsum board.
Further, when the steel material is an H-shaped steel, the refractory face material has at least two surfaces that are substantially orthogonal to each other, and one of the two surfaces defines the groove of the H-shaped steel. The other surface is preferably adhered to the outer surface of the steel material while closing. The face material preferably has an L-shaped or C-shaped cross section.
[0005]
Further, when the steel material is a cylindrical tube, the refractory face material is preferably formed in the form of a sump formed by a plurality of recesses, and the plurality of recesses are preferably filled with a refractory material.
In order to achieve the above object, in the fire-resistant coating method and the fire-resistant coating structure of the second invention of the present invention,
A massive adhesive is spotted on the outer surface of the steel material, and a band-shaped spacer having a plurality of contact surfaces is wound around the steel material and fixed, and a fire-resistant face material is applied to each contact surface. Until they come into contact with each other, the fire-resistant face material is pressed against the massive adhesive to cover the entire outer surface while surrounding the outer periphery of the steel material with the fire-resistant face material.
The strip-shaped spacer has an elongated surface and side surfaces extending substantially perpendicular to the elongated surface on both edges of the elongated surface, and the side surfaces are respectively located at predetermined positions in the strip direction of the elongated surface. Having a plurality of opposing cuts, wherein the cuts are formed by two cut edges each forming a predetermined angle with respect to the elongated surface, and until the two cut edges meet at each of the cut portions. Preferably, a plurality of contact surfaces are formed on the elongated surface by bending the elongated surface.
[0006]
Further, it is preferable that the height of the side surface from the elongated surface is separately set, and the interval between the contact surfaces from the steel material and the inclination angle with respect to the steel material are adjusted.
At this time, when the steel material is formed of a cylindrical tube, the fire-resistant face material is preferably formed in the form of a sump formed by a plurality of recesses, and the plurality of recesses are preferably filled with a refractory material.
In order to achieve the above object, in the fire-resistant coating method and the fire-resistant coating structure of the third invention of the present invention,
A belt-shaped spacer having a plurality of contact surfaces is wound around the outer circumference of the steel material along the band direction and fixed, and the fire-resistant face material is fixed to each of the contact surfaces while being in contact with the steel material. Is configured to cover the entire outer surface while surrounding the outer periphery with the fire-resistant face material.
The strip-shaped spacer has an elongated surface and side surfaces extending substantially perpendicular to the elongated surface on both edges of the elongated surface, and the side surfaces are respectively located at predetermined positions in the strip direction of the elongated surface. Having a plurality of opposing cuts, wherein the cuts are formed by two cut edges each forming a predetermined angle with respect to the elongated surface, and until the two cut edges meet at each of the cut portions. Preferably, a plurality of contact surfaces are formed on the elongated surface by bending the elongated surface.
[0007]
Further, it is preferable that the height of the side surface from the elongated surface is separately set, and the interval between the contact surfaces from the steel material and the inclination angle with respect to the steel material are adjusted. The strip-shaped spacer is usually made of a thin steel plate, but may be a gypsum board.
At this time, when the steel material is formed of a cylindrical tube, it is preferable that the refractory face material is formed in a slender shape formed by a plurality of recesses, and the plurality of recesses are filled with the refractory material.
[0008]
[Action]
According to the first aspect of the present invention,
Along with the longitudinal direction of the steel material, a fire-resistant face material of a predetermined size is directly bonded to at least a part of the outer surface of the steel material via an adhesive, and the outer periphery of the steel material is surrounded by the fire-resistant face material. By covering the entire outer surface, it is possible to omit the mounting work between the steel material and the intermediary such as the mounting bracket and between the face material and the intermediary, and by further removing the intermediary, the outer peripheral surface of the steel material A desired space is secured between the steel material and the face material, and particularly when the steel material itself has a core, it is possible to eliminate a dead space between the steel material and the face material.
According to the second aspect of the present invention,
By pressing the face material against a massive adhesive spotted on the outer surface of the steel material until the refractory face material comes into contact with each abutment surface of the strip spacer wound and fixed around the steel material Since it is possible to use the massive adhesive as a means for connecting the face material and the steel material and the band-shaped spacer as the means for positioning the face material, the attachment of the strip-shaped spacer to the steel material or the face material requires at least the spacer being a surface material. Since it is reduced to the extent that it is held between the material and the steel material, the construction efficiency can be further improved.
[0009]
According to the third aspect of the present invention,
By winding a band-shaped spacer having a plurality of contact surfaces along the band direction around the outer periphery of the steel material and fixing the same, the mounting bracket is fixed to each outer surface. Since the abutment surface can be secured, installation work is simplified. Further, by fixing a fire-resistant face material to each of the contact surfaces while abutting the same, and covering the entire outer surface while surrounding the outer periphery of the steel material with the fire-resistant face material, a plurality of outer surfaces can be simultaneously formed. Can be adjusted.
[0010]
【Example】
Embodiments of the present invention will be described below in detail with reference to the drawings.
First Embodiment (FIGS. 1 and 2)
FIG. 1 and FIG. 2 are a perspective view and a sectional view, respectively, of a refractory coating structure made of steel according to a first embodiment of the present invention. In FIG. 1, the fire-resistant face material 14 is partially omitted for clarity.
In FIG. 1, reference numeral 10 denotes a fire-resistant coating structure. The fire-resistant coating structure 10 includes an H-shaped steel 12, a fire-resistant face material 14 that covers an outer surface 16 of the H-shaped steel 12 over an outer periphery, and a fire-resistant coating. And an adhesive (not shown) for bonding the face material 14 to the outer surface 16 of the H-shaped steel 12.
The H-section steel 12 is a common steel column used in a building, and has two opposed outer surfaces 16 and two grooves 18 separated by a girder 15.
The refractory face material 14 has a C-shaped cross section and a predetermined size extending along the longitudinal direction of the H-shaped steel 12, and is formed by bonding an opposing surface to an outer surface 16 of the H-shaped steel 12. As shown in FIG. 2, the groove 18 is closed. At this time, the joint portion 20 where the face materials 14 are in contact with each other is generally subjected to joint treatment for attaching a tape and smoothly integrating with a putty. The fire-resistant face material 14 is mainly composed of calcium silicate plate, slate, fiber gypsum plate, gypsum board (GB-R, GB-S, GB-F, GB-D of JIS A 6901-1994, and other gypsum). (Including hard gypsum board with specific gravity of 1.0 to 1.6 in which core material is covered with base paper), etc., and its shape can be easily changed to L-shape and / or C-shape by cutting V-grooves etc. It is preferable to use one that can be processed.
[0011]
The adhesive may be liquid or lump, and the liquid adhesive may be vinyl acetate, PVA, etc. Gypsum-based adhesives obtained by kneading calcined gypsum containing synthetic rubber-based, epoxy-based and various additives and aggregates and water (for example, manufactured by Yoshino Gypsum Co., Ltd.) TR Cement, UP Heart, GL Font, Rib Bond... Etc.).
In this case, if the H-shaped steel 12 to be coated has a core and the outer surface 16 is smooth, a fire-resistant face material 14 is applied to the outer surface 16 of the H-shaped steel 12 using a liquid adhesive. By directly pressing and bonding, a dead space between the steel material 12 and the face material 14 can be removed. If the H-shaped steel 12 does not have a core, or if space is required between the H-shaped steel 12 and the fire-resistant face material 14 for electrical wiring or the like, use a massive adhesive to form the outer surface. The pressing of the face material 14 can be adjusted by pressing against the adhesive that has been spotted and placed on the surface material 16.
Further, at the time of construction, an adhesive having a small initial adhesive strength (particularly, an emulsion type of vinyl acetate, a massive gypsum-based adhesive, or the like) is used between the steel material 12 and the fire-resistant face material 14 to obtain a fire-resistant material. When the face material 14 is brought into contact with the steel material 12, the refractory face material 14 is centered on the steel material 12 and is temporarily pressed until it is hardened at the time of contact with the steel material 12, or the joint portion 20 where the refractory face material 14 is in contact with the steel material 12. If a screw or a quick-acting adhesive or a corner bead is used to fix the adhesive, it is possible to continue the finishing step without waiting for the adhesive to dry after curing. When fixing the joint portion 20 in this way, it is of course desirable that the massive adhesive be fixed to each of the steel material 12 and the fire-resistant face material 14, but it is not always necessary, and it is not always necessary. It is only necessary that the cured product of the adhesive is fixed and does not slip into the space of the floating portion. In particular, a fire-resistant face material 14 is used by using a dry-curable massive gypsum-based adhesive (for example, trade name: TR cement, UP PORT, GL Font, rib bond, etc., manufactured by Yoshino Gypsum Co., Ltd.). For example, when using gypsum board for
The adhesive only adheres to the base paper on the surface constituting the gypsum board, and the effect of the adhesive after curing is mainly to maintain the space of the floating portion. In order to fix the gypsum-based adhesive that does not adhere to the steel material 12 to the surface of the steel material 12, for example, a primer such as a modified acrylic resin emulsion may be applied to the surface of the steel material.
[0012]
Incidentally, the fire-resistant face material 14 is not limited to a single layer in order to improve the fire resistance or the like of the steel material, and a plurality of face materials 14 of the same type (including those having different performances) or different types can be laminated. For example, when a steel material such as a steel column is coated with one piece of reinforced gypsum board (GB-F) specified in JIS A 6901 with a thickness of 18 to 25 mm, a certification test of the Ministry of Construction (Ministry of Construction Notification No. 2999 of 1969, Appendix 1) (Specified fire resistance test method), a 1-hour fire-resistant structure. Similarly, when two layers are stacked, a 2-hour fire-resistant structure is obtained, and when three layers are stacked, a 3-hour fire-resistant structure is obtained.
Second embodiment (FIGS. 3 to 7)
FIGS. 3 and 4 are an exploded perspective view and a sectional view, respectively, of a fire-resistant coating structure made of steel according to a second embodiment of the present invention, and FIGS. 5 and 6 are made of a gypsum board and a thin plate according to the second embodiment, respectively. FIG. 7 is a perspective view of a steel strip spacer, and FIG. 7 is a cross-sectional view showing a state in which these strip spacers are wound around a steel material.
In FIG. 3, reference numeral 110 denotes a fire-resistant coating structure, which includes a steel pipe column 112, a fire-resistant face material 114 covering the outer surface 116 of the steel pipe column 112 over the outer periphery, and a fire-resistant coating material. Is roughly composed of a massive adhesive 150 for adhering the surface material 114 to the surface of the steel pipe column 112 and a band-shaped spacer 160.
[0013]
The steel pipe column 112 is a general steel material used for a building, and is a hollow body having a circular cross section.
The fire-resistant face material 114 is in the form of a sump formed by a plurality of recesses 180, and the plurality of recesses 180 are filled with a fire-resistant material of the same material as the face material 14 in order to prevent a decrease in fire resistance. I have. This drip-like form allows for tight contact with a band-shaped spacer 160 described later.
The massive adhesive 150 is the same as that in the first embodiment, and is attached and spotted on the outer surface 116 of the steel pipe column 112, and the fire-resistant face material 114 is attached to the contact surface 170 of the strip spacer 160 described later. Until it abuts, the refractory facing 114 is pressed against the bulk adhesive 150 (particularly, see FIG. 4) to provide the desired space between the outer surface 116 of the steel tube column 112 and the facing 114, and thereby the surface. The positioning of the member 114 can be adjusted.
Next, the strip-shaped spacer 160 will be described with reference to FIGS. 5 and 6. The strip-shaped spacer 160 has an elongated surface 162 and both edges of the elongated surface 162 substantially perpendicular to the elongated surface 162. An elongated side surface 164 (only one side is shown), and each of the side surfaces 164 has a plurality of opposing cuts 166 at predetermined positions in the strip direction of the elongated surface 162, and the cuts 166 are formed with respect to the elongated surface 162. And a plurality of abutment surfaces 170 are formed on the elongate surface 162 by folding the elongate surface 162 until the two incisions 168 meet at each of the cuts. Form. As shown in FIG.
The heights of the 64 contact surfaces 170 from the elongated surface 162 may be separately set, and the distance between the contact surfaces 170 from the steel material 112 and the inclination angle with respect to the steel material 112 may be adjusted. Regardless of the material of the spacer 160 wound around the steel material 112, it is easy to handle if it is preferably lightweight. Then, when wound around the steel material 112, for example, it is wound while being bent along a cut such as a V-groove according to the shape or finished shape (for example, a cylinder or a prism) of the steel material 112, and is wound on the gypsum board spacer of FIG. In the case of the thin steel spacer of FIG. 6, the engagement portions 172 provided at both ends of the spacer 160 are fitted and tightened by bonding the both ends, and the endless spacers are formed to form the steel material 112. Attach to In the gypsum board spacer, the surface opposite to the contact surface 170 in FIG. 5 is used as the contact surface so that each cutout faces outward, that is, the fireproof surface material. It may be wound. In addition, it is needless to say that the number of grooves provided in the flat plate and the interval between them can be adjusted according to the shape of the steel material 112 to obtain a desired finished shape.
[0014]
Third Embodiment (FIGS. 8 and 9)
8 and 9 are a perspective view and a cross-sectional view, respectively, of a steel fire-resistant covering structure according to the third embodiment.
In FIG. 8, reference numeral 10 is a fire-resistant coating structure, which is a steel pipe column 212 having a rectangular cross section, and a fire-resistant face material 214 covering the outer surface 216 of the steel pipe column 212 over the outer circumference. And a belt-like spacer 260 made of a thin steel sheet wound around the outer periphery of the steel pipe column 212.
The steel pipe column 212, the fire-resistant face material 214, and the strip-shaped spacer 260 are the same as those described in the first and second embodiments, so that the description thereof will be omitted, and the characteristic portions of the present embodiment will be described. For example, in the face material 214 surrounding the outer periphery of the steel pipe column 212, a strip-shaped spacer 260 made of a thin steel sheet wound around the outer periphery of the steel pipe column 212.
Not only can the four face members 214 be fixed with screws 280 or the like at the same time, but also the face members 214 adjacent in the outer peripheral direction can be fixed with the joints 220 with the screws 280 or the like, so that the four faces of the strip spacer 260 can be fixed. The fixing between the contact surface 270 and the face material 214 is 4
Only one of the abutments located on the outer surface 216 of the surface (only two surfaces are shown in the figure) may increase the efficiency of construction.
[0015]
It is clear that the present invention is applicable not only to steel columns or steel pipe columns, but also to steel beams and other buildings.
[0016]
【The invention's effect】
As apparent from the above description, according to the first aspect of the present invention,
By directly bonding the refractory face material to the surface of the steel material via an adhesive, it became possible to reduce the dead space between the outer surface of the steel material and the face material while increasing the construction efficiency.
According to the second aspect of the present invention, a block-like material in which the face material is spotted on the outer surface of the steel material until the face material contacts the contact surface of the belt-shaped spacer fixed by being wound around the outer periphery of the steel material. By pressing against the adhesive, it became possible to use the strip-shaped spacer as a means for positioning the face material, not as a means for joining the steel material and the face material, and as a result, it was possible to further improve the construction efficiency .
According to the third aspect of the present invention, the belt-shaped spacer is wound around the outer periphery of the steel material and fixed, and the face material is brought into contact with the contact surface of the spacer, so that the centering of a plurality of outer surfaces can be adjusted at once. This makes it possible to increase the construction efficiency and at the same time secure a desired space between the outer surface of the steel material and the face material, or to center the face material.
[Brief description of the drawings]
FIG. 1 is a perspective view of a steel fire-resistant covering structure according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of a steel fire-resistant covering structure according to the first embodiment of the present invention.
FIG. 3 is an exploded perspective view of a steel fire-resistant covering structure according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view of a steel fire-resistant covering structure according to a second embodiment of the present invention.
FIG. 5 is a perspective view of a gypsum board strip spacer according to a second embodiment of the present invention.
FIG. 6 is a perspective view of a strip spacer made of a thin steel sheet according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view illustrating a state in which a belt-shaped spacer according to a second embodiment of the present invention is wound around a steel material.
FIG. 8 is a perspective view of a steel fire-resistant covering structure according to a third embodiment of the present invention.
FIG. 9 is a cross-sectional view of a steel fire-resistant covering structure according to a third embodiment of the present invention.
[Explanation of symbols]
10, 110, 210 Fireproof covering structure 12, 112, 212 Steel material 14, 114, 214 Fireproof surface material 150 Adhesive 160, 260 Strip spacer 162 Elongated surface 164 Side surface 166 Cut 168 Cut edge 170, 270 Contact surface

Claims (3)

Along the longitudinal direction of the steel material, a refractory face material of a predetermined size is directly bonded to at least a part of the outer surface of the steel material via an adhesive,
In covering the entire outer surface while surrounding the outer periphery of the steel material with the fire-resistant face material,
The adhesive has an adhesive property to at least one of the steel material and the fire-resistant face material, and is a massive dry-curable adhesive,
On the outer surface of the steel material, spot the lumpy adhesive and put it up,
According to the centering situation of the outer surface of the steel material, while pressing the refractory face material against the adhesive, adjust the positioning of the face material,
By drying and curing the adhesive while fixing the surface materials adjacent in the outer peripheral direction of the steel material at the joints, the space of the floating portion between the fire-resistant surface material and the outer surface of the steel material is reduced. A fire-resistant coating method for a steel material, characterized in that the method comprises holding . The adhesive is a gypsum-based adhesive,
The method according to claim 2, wherein the face material is made of a gypsum board. A refractory coating structure for a steel material, wherein the refractory coating is performed by the refractory coating method for a steel material according to claim 1 or 2.

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