Fixing structure and fixing hardware for covering material

Abstract

To provide a fixing structure for a covering material allowing a fire resistive material covering material and other covering materials to be easily fixed to surroundings of a structural material made of a steel material without requiring troublesome processes at site and tools such as an electric power tool.SOLUTION: A fixing structure comprises the steps of: filling a mat-shaped thick covering material 6 in a side abdominal part 14 surrounded by flanges 11, 12 and a web 13 of a structural material (beam 1); abutting a thin covering material 7 on an outer surface of the flange 12; and attaching a fixing metal fitting 8 on the thick covering material 6 and the thin covering material 7 from a tip side of the flange 12. The fixing metal fitting 8 is provided with: a flat splicing piece 81 pressed on a surface of the thin covering material 7; a holding piece 82 bent from one end edge of the splicing piece 81 to the thick covering material 6 side to extend; and a piercing piece 83 extending from a tip of the holding piece 82 to the splicing piece 81 side to be pierced in the thick covering material 6, wherein the thick covering material 6 and the thin covering material 7 in a state of enclosing the flange 12 are fixed by being elastically sandwiched between the piercing piece 83 and the splicing piece 81.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present application relates to a fixing structure for fire-resistant covering materials and the like that are placed around the structural members of a steel-framed building, and to fixing metal fittings used in the fixing structure. [Background technology]

[0002] In steel-framed buildings, laws and regulations require that appropriate fire-resistant coatings be applied around structural members such as steel beams and columns to delay the deterioration of the frame's strength due to heat during a fire. Conventionally, the following fire-resistant coating methods have been used:

[0003] (1) A refractory material made into a foam by mixing inorganic components such as vermiculite or rock wool with water glass or hydraulic cement is sprayed around the steel frame and allowed to harden (for example, Patent Document 1, etc.).

[0004] (2) A fire-resistant covering material formed into a flexible mat by laminating inorganic fibers such as rock wool or ceramic fiber is stretched around the steel frame and fixed by inserting a mounting pin that has been welded to the edge of the steel frame in advance (for example, Patent Document 2, etc.). There is also a post-installation method in which the fire-resistant covering material is stretched, and then a pin is inserted and welded with a dedicated welding gun.

[0005] (3) The steel frame is surrounded by non-combustible boards such as calcium silicate boards, gypsum boards, and rock wool boards, which are then fixed to the steel frame using appropriate fixtures, adhesives, etc. Furthermore, a mat-like fire-resistant covering material is laid on the outside of the non-combustible boards and fastened with nails, screws, tackers, etc. (For example, Patent Documents 3 and 4, etc.).

[0006] (4) Deck slabs and exterior wall materials (exterior wall panels) made of foam lightweight concrete (ALC) are attached to steel frames, and match-shaped fire-resistant covering material is spread around the steel frames to encase them, and the edges are fastened to the deck slab or exterior wall material with nails, screws, tackers, etc. (For example, Patent Documents 4, 5, 6, etc.) In these construction methods, the sides and bottom surfaces of the steel frame outer beams that do not face the exterior wall material are covered with a mat-like fire-resistant covering material, and the lower edge of the fire-resistant covering material is laid on the back surface of the exterior wall material, and the upper edge is laid on the underside of the deck slab and fastened to it, thereby creating a composite fire-resistant covering structure (synthetic fire-resistant covering structure) in which the exterior wall material, fire-resistant covering material, and deck slab are continuous.

[0007] In the fire-resistant coating methods (2) to (4) described above, a sheet-shaped fire-resistant coating material that foams and expands due to the heat of fire may be used instead of or in combination with a mat-shaped fire-resistant coating material (e.g., Patent Documents 3, 4, 5, 7, etc.). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 10-147993 [Patent Document 2] Japanese Patent Application Publication No. 6-136853 [Patent Document 3] Japanese Patent Application Laid-Open No. 2001-98661 [Patent Document 4] Japanese Patent Application Laid-Open No. 2010-43444 [Patent Document 5] Registered Utility Model No. 3171133 [Patent Document 6] Japanese Patent Application Laid-Open No. 2007-9607 [Patent Document 7] Japanese Patent Application Laid-Open No. 2014-025213 Summary of the Invention [Problem to be solved by the invention]

[0009] Among the conventional fire-resistant coating methods, the spraying method (1) has the inconvenience of requiring curing around the sprayed area and requiring only specialized technicians to perform the work. In comparison, the methods (2) to (4) using mat- or sheet-like fire-resistant coating materials have the advantage of being easily cut to the desired shape using scissors or a cutter. However, fixing the fire-resistant coating material around the steel frame requires tedious processes, such as welding mounting pins to the steel frame using specialized tools or cutting non-combustible plates to fit the size of the steel frame and attaching them around the steel frame. Furthermore, fastening the fire-resistant coating material requires power tools such as an electric screwdriver or a tacker.

[0010] The invention disclosed in this application has been made to improve the efficiency of such construction work, and its specific problem to be solved is to provide a fixing structure for fire-resistant covering material that can be easily fastened to steel beams, particularly for surrounding steel beams on the periphery where the exterior wall material and the deck slab meet at right angles, without requiring cumbersome on-site processes or power tools, and fixing hardware to be used in the fixing structure.

[0011] Furthermore, the invention disclosed in this application provides a fixing structure and fixing hardware for covering materials that can be applied to not only steel beams but also steel columns and other structural materials as fire-resistant covering materials, and that can be applied not only to fire-resistant covering materials but also to the construction of insulating materials, airtight materials, moisture-proof materials, sound-absorbing materials, and other covering materials formed in a flexible mat shape. [Means for solving the problem]

[0012] In order to achieve the above-mentioned object, the invention disclosed in this application employs a fixing structure for a covering material, which is comprised of a structural member made of a steel beam having at least one pair of flanges parallel to each other and a web connecting the pair of flanges, a thick covering material that covers at least one side portion surrounded by the pair of flanges and the web, a thin covering material that is thinner than the thick covering material and is applied to the outer surface of at least one of the pair of flanges, and fixing metal fittings that are attached to the thick covering material and the thin covering material from the tip side of the one flange, and the thick covering material is a mat-like covering material that is flexible and has a thickness that is larger than the inner dimension of the side portion. The fixing metal fitting is formed to have a large cross-sectional dimension and is filled in a compressed state into the flank area of the structural material, and is characterized by comprising a flat splice piece that is pressed against the surface of the thin covering material, a holding piece that bends and extends from one edge of the splice piece toward the thick covering material, and a piercing piece that extends from the tip of the holding piece toward the splice piece and pierces the thick covering material, and is shaped so that the distance between the tip edge of the piercing piece and the splice piece can be elastically expanded, and the thick covering material and thin covering material are elastically sandwiched between the piercing piece and the splice piece while surrounding the one flange, and are fixed to the outer surface of the flank area of the structural material and the one flange, respectively.

[0013] Furthermore, in the fixing structure of this covering material, a slit into which one of the flanges can be inserted is formed near one edge of the thick covering material, and the thick covering material is filled into the flank with the one of the flanges inserted into the slit, so that the outer part of the slit in the thick covering material covers the outer surface of the one of the flanges, and the thin covering material is fixed by the fixing metal fittings in a state where it is placed against the outer surface of the one of the flanges so that it is continuous with the outer part of the slit without any gaps or overlaps with the outer part.

[0014] Furthermore, as a specific embodiment of the fixing structure of this covering material, it is possible to specify that the structural material is a beam made of H-shaped steel, the one flange is the lower flange of the beam, and the thick covering material is a fire-resistant covering material made by laminating inorganic fibers and forming them into a mat of a predetermined thickness.

[0015] Furthermore, the beam can be identified as a peripheral beam arranged along the outer periphery of a steel-framed building, with exterior wall material erected on the outside of the beam, and a thin covering material superimposed on the underside of the lower flange of the beam being bent between the lower flange of the beam and the exterior wall material and extended so as to continue to the back surface of the exterior wall material.

[0016] Furthermore, the fixing metal fitting used in the fixing structure of the aforementioned covering material comprises a flat splice piece pressed against the surface of the thin covering material, a holding piece that extends from one edge of the splice piece while being bent toward the thick covering material, and a piercing piece that extends from the tip of the holding piece toward the splice piece and pierces the thick covering material, the holding piece being curved in an arc with the splice piece side concave, and the crossing angle of an imaginary plane from the connecting edge with the splice piece to the connecting edge with the piercing piece with the splice piece is an acute angle, and the holding piece is shaped so that the crossing angle can be elastically deformed at least in the enlarging direction, and the piercing piece extends from the connecting edge with the holding piece in a direction approaching the other edge of the splice piece, and a pointed portion with a barb is formed at its tip edge.

[0017] A latching claw may be formed at the middle portion of the splice piece so as to protrude obliquely toward the holding piece.

[0018] Furthermore, it is more preferable if one end edge of the splice piece extends between the lower flange of the beam and the exterior wall material, and if a pressing piece is formed on the one end edge that is curved to fit along the bending point of the thin covering material. [Effects of the Invention]

[0019] The covering material fixing structure and fixing hardware configured as described above allows the covering material surrounding beams and other structural members to be fixed to the structural members efficiently in an extremely simple process without requiring the skills of a specialist craftsman or the use of special fasteners or tools, etc. This significantly improves on-site workability.

[0020] The fixing brackets can be manufactured inexpensively by bending, for example, a thin, spring steel strip into a roughly J-shape when viewed from the side, and they are easy to handle. Furthermore, because the fixing brackets are attached so as not to come into direct contact with the structural material, even if the fixing brackets are heated during a fire, the heat transferred to the beams can be prevented. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view showing a first embodiment of a structure for fixing a covering material to a perimeter beam of a steel-framed building, showing the area around the perimeter beam before construction. FIG. [Figure 2] This is also a cross-sectional view of the outer perimeter beam after construction. [Figure 3] FIG. 3 is a perspective view of a fixing fixture used in the fixing structure of the covering material shown in FIGS. 1 and 2. [Figure 4] FIG. 10 is a cross-sectional view showing a second embodiment of the fixing structure of the covering material to the outer perimeter beam of a steel-framed building after construction around the outer perimeter beam. [Figure 5] FIG. 5 is a perspective view of a fixing metal fitting used in the fixing structure of the covering material shown in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the invention disclosed in the present application will be described with reference to the drawings.

[0023] Figures 1 and 2 show the fixing structure of the covering material, which covers the periphery of the beams arranged along the perimeter of a steel-framed building with two types of covering material of different thicknesses, and Figure 3 shows an example of the configuration of the fixing metal fittings that fix these fire-resistant covering materials.

[0024] In the illustrated embodiment, the beam 1 is made of an H-shaped steel beam, and a deck 2 made of, for example, an ALC (lightweight aerated concrete) panel is placed on its upper surface. Furthermore, a panel-like exterior wall material 3 made of, for example, a cement-based material or a ceramic material is attached to the exterior side of the beam 1. The deck 2 and the exterior wall material 3 each exhibit a predetermined fire resistance in the event of a fire. The exterior wall material 3 is erected by engaging exterior wall material fasteners 31, 32 attached to the backside of the exterior wall material 3 with long rail members 41, 42 made of, for example, angle iron or deformed C-shaped steel, which are connected to the exterior flanges 11, 12 of the beam 1 via corrugated brackets. A heat insulating material 5 made of, for example, a glass wool mat is filled in the gap formed between the edge of the deck slab 2 and the exterior wall material 3. The invention disclosed herein does not specifically limit the fixing means for the deck slab 2 or the exterior wall material 3.

[0025] A fire-resistant covering is applied around this beam 1, extending from the area in contact with the underside of the deck slab 2 to the backside of the exterior wall material 3. This fire-resistant covering is composed of a thick covering material 6 that covers the space within the recess that opens to the side of the beam 1 and is surrounded by the upper flange 11, web 13, and lower flange 12 of the beam 1 in a U-shape (in the invention disclosed in this application, this space is referred to as the "side portion 14" of the beam 1), a thin covering material 7 that stretches from the underside of the lower flange 12 of the beam 1 to the backside of the exterior wall material 3, and fixing brackets 8 that fix both covering materials 6 and 7 to the bottom flange 12 of the beam 1. These will be described in detail below.

[0026] The thick covering material 6 in the illustrated embodiment is a fire-resistant covering material formed into a flexible mat by layering inorganic fibers, such as rock wool, ceramic fiber, glass wool, or asbestos, to a thickness that meets fire resistance standards. This thick covering material 6 is prepared in advance so that its cross-sectional dimensions are slightly larger than the inner dimensions of the interior side portion 14 of the beam 1. Specifically, the thick covering material 6 is formed so that its thickness D exceeds the overhang width w of the upper flange 11 and the lower flange 12 at the interior side portion 14 of the beam 1 (if the overhang widths of the flanges 11, 12 are different, the larger of the two). Alternatively, multiple sheets of the thick covering material 6 are stacked and glued together, and cut so that their height H exceeds the height h of the web 13. When this thick covering material 6 is compressed and filled into the interior side portion 14 of the beam 1, its resilience against vertical compression allows it to self-support within the side portion 14. Furthermore, the bulging portion that protrudes slightly from the side portion 14 of the beam 1 covers the end faces of the upper flange 11 and the lower flange 12 of the beam 1. Note that cutout step portions (not shown) that cover the end faces of the upper flange 11 and the lower flange 12 of the beam 1 may be formed in advance at the upper and lower edges of the thick covering material 6.

[0027] The thin covering material 7 is also a mat-like fire-resistant covering material made of the same material as the thick covering material 6, but is formed so that its thickness is relatively smaller than that of the thick covering material 6 (approximately 1 / 4 to 1 / 2 the thickness of the thick covering material 6). This thin covering material 7 is laid over the entire underside of the bottom flange 12 of the beam 1, and then extends outdoors, bending between the beam 1 and the exterior wall material 3, and is stretched so that it continues to the underside of the rear surface of the exterior wall material 3.

[0028] The fixing bracket 8 is a member formed, for example, by bending a strip-shaped thin spring steel plate into a roughly J-shape when viewed from the side. The fixing bracket 8 comprises a flat splice piece 81 that is placed from below on the surface of the thin covering material 7, a holding piece 82 that extends from one edge of the indoor side of the splice piece 81 and is bent toward the thick covering material 6, and a piercing piece 83 that extends from the tip of the holding piece 82 toward the splice piece 81 and is pierced into the thick covering material 6.

[0029] The holding piece 82 is curved in a gentle arc shape with the splice piece 81 side being concave, and the intersection angle θ of an imaginary plane from the connecting edge with the splice piece 81 to the connecting edge with the piercing piece 83 with respect to the splice piece 81 is an acute angle (generally greater than or equal to 60 degrees and less than 90 degrees), and the piercing piece 83 is shaped so that the intersection angle θ can be elastically deformed at least in the enlarging direction. Furthermore, the piercing piece 83 is not parallel to the splice piece 81, but extends obliquely from the connecting edge with the holding piece 82 in a direction approaching the other end edge of the splice piece 81, and a generally arrow-shaped pointed tip 85 with a barb 84 is formed on its leading edge.

[0030] This fixing bracket 8 is placed against the thick covering material 6 and the thin covering material 7 from the tip side (indoor side) of the bottom flange 12 of the beam 1, and while pressing the splice piece 81 against the underside of the thin covering material 7, the piercing piece 83 is lifted and its pointed end 85 is pierced into the thick covering material 6. Then, the tip edge of the piercing piece 83 elastically returns to the splice piece 81 side, causing the lower part of the thick covering material 6 and the thin covering material 7 to be pressed against the top and bottom of the bottom flange 12 of the beam 1, wrapping around the bottom flange 12. Because the tip edge of the piercing piece 83 is formed with a barb 84, the fixing bracket 8 pierced into the thick covering material 6 is firmly held in place so that it will not easily fall out. In this way, a fire-resistant covering is obtained in which the covering materials stacked above and below the bottom flange 12 of the beam 1 are elastically sandwiched from above and below by the fixing bracket 8.

[0031] FIG. 4 shows a modified structure for fixing the covering material to the same location as described above, and FIG. 5 shows an example of a fixing bracket 8 used in the fixing structure of FIG. 4. In this example, the materials of the thick covering material 6 and the thin covering material 7 are the same as those in the above-described embodiment, but the installation configuration is slightly different. Specifically, the thick covering material 6 is cut to a greater height than in the above-described embodiment, and a slit 61 is formed near its lower edge into which the bottom flange 12 of the beam 1 can be inserted. The thick covering material 6 is then compressed and filled into the side portion 14 of the beam 1 so that the bottom flange 12 is inserted into the slit 61. By placing the thick covering material 6 in this configuration on the side portion 14 of the beam 1, the end face of the bottom flange 12 is completely covered by the outer portion 62 of the slit 61, and the thick covering material 6 is more firmly held in place on the side portion 14 of the beam 1.

[0032] On the other hand, the thin covering material 7 is placed against the bottom flange 12 so that its extension toward the indoor side is short, and is arranged so that it is continuous with and has approximately the same thickness as the outer portion 62 of the slit 61 in the thick covering material 6, without any gaps. That is, in this embodiment, the position of the slit 61 formed in the thick covering material 6 is set so that the outer portion 62 of the slit 61 in the thick covering material 6 and the thin covering material 7 are approximately the same thickness. Then, as in the above-described embodiment, when the splice piece 81 of the fixing bracket 8 presses upward the thin covering material 7 and the outer portion 62 of the thick covering material 6, the piercing piece 83 is lifted and its pointed tip 85 is pierced into the thick covering material 6, and the elasticity of the tip edge of the piercing piece 83 returns to the splice piece 81 side, and the thick covering material 6 and the thin covering material 7 are fixed in a state where they are wrapped around the bottom flange 12 of the beam 1. A barb 84 is formed at the tip edge of the piercing piece 83, so that the fastening metal fitting 8 pierced into the thick covering material 6 is held firmly so as not to easily fall out.

[0033] Furthermore, in this embodiment, a latching claw 86 that protrudes obliquely toward the holding piece 82 is formed on the splice piece 81 of the fixing bracket 8 by cutting out and raising the middle part of the splice piece 81 into a roughly V-shape. This latching claw 86 latches near the edge of the thin covering material 7 when the piercing piece 83 of the fixing bracket 8 is pierced into the thick covering material 6, and by pulling the thin covering material 7 toward the indoor side, it acts to make it difficult for the thin covering material 7 to separate from the lower flange 12.

[0034] In this configuration, one edge of the splice piece 81 of the fixing bracket 8 extends out slightly long enough to reach the gap between the bottom flange 12 of the beam 1 and the exterior wall material 3, and a pressing piece 87 that curves downward in a roughly quarter-circle arc is formed on that edge. This pressing piece 87 is positioned so as to follow the bent portion of the thin covering material 7 that is stretched continuously from the underside of the bottom flange 12 of the beam 1 to the back surface of the exterior wall material 3, and acts to maintain the stretched state of the thin covering material 7.

[0035] As described above, the thick mat-like covering material 6 is compressed and packed into the side 14 of the beam 1, and the thin covering material 7 is placed on the underside of the bottom flange 12. The splice piece 81 of the fastener 8 is pressed against the thin covering material 7 while the piercing piece 83 is pierced into the thick covering material 6, thereby securing the thick covering material 6 and the thin covering material 7 together while surrounding the bottom flange 12. By employing this covering material fixing structure and fastener 8, the mat-like covering material surrounding the beam 1 can be efficiently fastened in an extremely simple process without the need for specialized craftsmanship or special fasteners or tools. Because the fastener 8 is attached without direct contact with the beam 1, even if the fastener 8 is heated during a fire, heat transfer to the beam 1 is suppressed. Furthermore, covering the underside of the beam 1 with the thin covering material 7 facilitates securing a ventilation space between the underside of the beam 1 and the exterior wall material 3.

[0036] In each of the above-mentioned embodiments, the thin covering material 7 can be a sheet-like fire-resistant covering material that foams and expands due to heat. Also, in the embodiment shown in Fig. 4, the thin covering material 7 can be placed so that its edge overlaps the outer portion 62 of the thick covering material 6 that covers the underside of the bottom flange 12 of the beam 1, and the fasteners 8 can be attached so that the underside of the overlapping portion is held down by the splice pieces 81 of the fasteners 8. In addition, in areas where both side surfaces of the beam 1 need to be covered, the thick covering material 6 can be compressed and filled into the flanks 14 on both sides, and the thin covering material 7 can be placed on the underside of the beam 1 and fixed by attaching the fasteners 8 to both sides of the beam 1 so that they face each other.

[0037] The invention disclosed in this application can be applied not only to beam 1 but also to a fire-resistant coating method for columns and other structural materials made of H-shaped steel, etc., by replacing the horizontal orientation with the vertical orientation, etc. In the invention disclosed in this application, in a cross section perpendicular to the material axis of a structural material made of H-shaped steel or similar I-shaped steel, lipless channel steel, or a laminated steel material made by joining two channel steels back to back, the two flat plate-like portions that usually consist of two pieces protruding in a direction (weak axis direction) perpendicular to the strong axis direction (direction in which the main bending load acts) are called "flanges 11, 12," and the plate-like portion that joins the two flanges 11, 12 in the weak axis direction is called "web 13."

[0038] Furthermore, the same method can be used for installing not only fire-resistant covering materials but also flexible insulating materials, airtight materials, moisture-proof materials, sound-absorbing materials, interior underlayment materials, and other covering materials of appropriate thickness. In such cases, the dimensions and shapes of each part of the fixing bracket can be changed appropriately depending on the thickness and material of the covering material.

[0039] Furthermore, the embodiments and other matters disclosed in this specification can also be understood as the technical ideas described in the following supplementary notes. (Appendix 1) A structural member made of a shaped steel having at least a pair of flanges parallel to each other and a web connecting the pair of flanges, a thick covering material covering at least one side surface surrounded by the pair of flanges and the web; a thin covering material that is thinner than the thick covering material and is applied to an outer surface of at least one of the pair of flanges; a fixing metal fitting attached to the thick covering material and the thin covering material from the tip side of the one flange; A fixing structure for a covering material comprising: The thick covering material is a flexible mat-like covering material formed to have a cross-sectional dimension larger than the inner dimension of the flank area and is filled in the flank area in a compressed state; The fixing metal fitting comprises a flat splice piece pressed against the surface of the thin dressing, a holding piece bent toward the thick dressing and extending from one end edge of the splice piece, and a piercing piece extending from the tip of the holding piece toward the splice piece and piercing the thick dressing, and is shaped so that the gap between the tip edge of the piercing piece and the splice piece can be elastically expanded, The thick covering material and the thin covering material are elastically sandwiched between the piercing piece and the splicing piece while surrounding the one flange, and are fixed to the side of the structural material and the outer surface of the one flange, respectively. A fixing structure for a covering material. (Appendix 2) In the fixing structure of the covering material described in Appendix 1, a slit into which the one flange can be inserted is formed near one end edge of the thick covering material; When the thick dressing is filled into the flank with the one flange inserted into the slit, the portion of the thick dressing outside the slit covers the outer surface of the one flange, The thin covering material is fixed by the fixing metal fittings in a state where it is applied to the outer surface of one of the flanges so that it is continuous with the outer portion of the slit without any gaps or overlaps the outer portion. A fixing structure for a covering material. (Appendix 3) In the fixing structure of the covering material described in Appendix 1 or Appendix 2, The structural material is a beam made of H-shaped steel, the one flange is a bottom flange of the beam, 1. A fixing structure for a covering material, wherein the thick covering material is a fire-resistant covering material formed by laminating inorganic fibers into a mat of a predetermined thickness. (Appendix 4) In the fixing structure of the covering material described in Appendix 3, The beam is a perimeter beam arranged along the perimeter of the steel-framed building, An exterior wall material is erected on the outside of the beam, The thin covering material that is superimposed on the lower surface of the lower flange of the beam is bent between the lower flange of the beam and the exterior wall material and extended so as to continue to the back surface of the exterior wall material. A fixing structure for a covering material. (Appendix 5) A fixing bracket used in the fixing structure of the covering material described in any one of Supplementary Note 1 to Supplementary Note 4, a flat splice piece that is pressed against the surface of the thin dressing; A holding piece that is bent and extends from one end edge of the splice piece toward the thick covering material; a piercing piece extending from the tip of the holding piece toward the splice piece and piercing the thick dressing; Equipped with The holding piece is curved in an arc shape with the splice piece side being concave, and an intersection angle of an imaginary plane from a connecting edge with the splice piece to a connecting edge with the piercing piece with the splice piece is an acute angle, and the intersection angle is shaped so as to be elastically deformable at least to the enlarging side, The piercing piece extends from the connecting edge with the holding piece in a direction approaching the other end edge of the splicing piece, and a pointed portion having a barb is formed at the leading edge. A fixing bracket for a covering material. (Appendix 6) In the fixing hardware for the covering material described in Appendix 5, A latching claw is formed at the middle of the splice piece, protruding obliquely toward the holding piece. A fixing bracket for a covering material. (Appendix 7) A fixing bracket used in the fixing structure of the covering material described in Appendix 4 or Appendix 5 to Appendix 6 that cite Appendix 4, The splice piece has one end edge that extends to between the lower flange of the beam and the exterior wall material, and a pressing piece that is curved to fit the bent portion of the thin covering material is formed on the one end edge. A fixing bracket for a covering material. [Industrial Applicability]

[0040] The invention disclosed in this application can be widely used as a technique for fixing various covering materials around structural members in steel-framed buildings and the like. [Explanation of symbols]

[0041] 1 beam 11 Upper flange 12 Lower flange 13. Web 14 flank 2 Floor slab 3 Exterior wall materials 31, 32 Exterior wall material fixings 41, 42 Rail members 5. Insulation 6 Thick covering material 61 Slit 62 Outer part 7 Thin covering material 8 Fixing bracket 81 Joint piece 82 Holding piece 83 Stab piece 84 Return 85 Pointed tip 86 Latching claw 87 Presser foot

Claims

1. A structural member made of a shaped steel having at least a pair of flanges parallel to each other and a web connecting the pair of flanges, a thick covering material covering at least one side surface surrounded by the pair of flanges and the web; a thin covering material that is thinner than the thick covering material and is applied to an outer surface of at least one of the pair of flanges; a fixing metal fitting attached to the thick covering material and the thin covering material from the tip side of the one flange; A fixing structure for a covering material comprising: The thick covering material is a flexible mat-like covering material formed to have a cross-sectional dimension larger than the inner dimension of the flank area and is filled in the flank area in a compressed state; The fixing metal fitting comprises a flat splice piece pressed against the surface of the thin dressing, a holding piece bent and extending from one end edge of the splice piece toward the thick dressing, and a piercing piece extending from the tip of the holding piece toward the splice piece and piercing the thick dressing, The piercing piece is shaped so as to be able to elastically expand the gap between the tip edge of the piercing piece and the splice piece, The fixing metal fittings are attached so as not to directly contact the flanges, by elastically sandwiching the thick covering material and the thin covering material between the piercing piece and the splicing piece. The thick covering material and the thin covering material are fixed to the side of the structural material and the outer surface of the one flange, respectively, while surrounding the one flange. A fixing structure for a covering material.

2. The fixing structure for a covering material according to claim 1, a slit into which the one flange can be inserted is formed near one end edge of the thick covering material; When the thick dressing is filled into the flank with the one flange inserted into the slit, the portion of the thick dressing outside the slit covers the outer surface of the one flange, The thin covering material is fixed by the fixing metal fittings in a state where it is applied to the outer surface of one of the flanges so that it is continuous with the outer portion of the slit without any gaps or overlaps the outer portion. A fixing structure for a covering material.

3. The fixing structure for a covering material according to claim 1 or 2, The structural material is a beam made of H-shaped steel, the one flange is a bottom flange of the beam, 1. A fixing structure for a covering material, wherein the thick covering material is a fire-resistant covering material formed by laminating inorganic fibers into a mat of a predetermined thickness.

4. 4. The fixing structure for a covering material according to claim 3, The beam is a perimeter beam arranged along the perimeter of the steel-framed building, An exterior wall material is erected on the outside of the beam, The thin covering material that is superimposed on the lower surface of the lower flange of the beam is bent between the lower flange of the beam and the exterior wall material and extended so as to continue to the back surface of the exterior wall material. A fixing structure for a covering material.

5. The fixing structure for a covering material according to claim 1 or 2, The holding piece of the fixing metal fitting is curved in an arc shape with the splice piece side being concave, so that an intersection angle of an imaginary plane extending from the connecting edge with the splice piece to the connecting edge with the piercing piece with respect to the splice piece is an acute angle, and is shaped so that the intersection angle can be elastically deformed at least in the enlarging direction, The piercing piece extends from the connecting edge with the holding piece in a direction approaching the other end edge of the splicing piece, and a pointed portion having a barb is formed at the leading edge. A fixing structure for a covering material.

6. 6. The fixing structure for a covering material according to claim 5, A latching claw is formed at the middle of the splice piece, protruding obliquely toward the holding piece. A fixing structure for a covering material.

7. 5. The fixing structure for a covering material according to claim 4, The holding piece of the fixing metal fitting is curved in an arc shape with the splice piece side being concave, so that an intersection angle of an imaginary plane extending from the connecting edge with the splice piece to the connecting edge with the piercing piece with respect to the splice piece is an acute angle, and is shaped so that the intersection angle can be elastically deformed at least in the enlarging direction, The piercing piece extends from the connecting edge with the holding piece in a direction approaching the other end edge of the splicing piece, and a pointed portion having a barb is formed at the leading edge of the piercing piece, The splice piece has one end edge that extends to between the lower flange of the beam and the exterior wall material, and a pressing piece that is curved to fit the bent portion of the thin covering material is formed on the one end edge. A fixing bracket for a covering material.

Images