Fixing structure and fixing metal fitting 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 a fireproof coating material or the like disposed around a structural member of a steel frame building, and a fixing metal fitting used for the fixing structure.

Background Art

[0002] In order to delay the reduction in the strength of the frame of a steel frame building due to heat during a fire, it is obligatory by laws and regulations to apply an appropriate fireproof coating around structural members such as beams and columns made of steel frame materials. Conventionally, the following fireproof coating methods have been adopted.

[0003] (1) A fireproof material processed into a foamed shape by mixing vermiculite, rock wool and other inorganic components into water glass or hydraulic cement is sprayed around the steel frame material and cured (for example, Patent Document 1, etc.).

[0004] (2) An inorganic fiber such as rock wool or ceramic fiber is laminated to form a flexible mat-shaped fireproof coating material, which is spread around the steel frame material and fixed by piercing it into mounting pins pre-welded at the edges of the steel frame material (for example, Patent Document 2, etc.). There is also a post-welding method in which the fireproof coating material is spread and then the pins are pierced and welded with a dedicated welding gun.

[0005] (3) The steel frame material is surrounded by a non-combustible plate material made of calcium silicate board, gypsum board, rock wool board, etc., and these are fixed to the steel frame material using appropriate fixtures, adhesives, etc. Further, a mat-shaped fireproof coating material is overlaid on the outside of the non-combustible plate material and fastened with nails, screws, tackers, etc. (for example, Patent Documents 3, 4, etc.).

[0006] (4) Attach floor slabs and exterior wall materials (exterior wall panels) made of foamed lightweight concrete (ALC) to steel frame members, extend a mat-shaped fireproof coating material around the steel frame members to wrap the steel frame members, and fasten the edges to the floor slabs and exterior wall materials with nails, screws, tackers, etc. (for example, Patent Documents 4, 5, 6, etc.). In these construction methods, the side and bottom surfaces of the outer peripheral beam made of steel frame members that do not face the exterior wall material are covered with a mat-shaped fireproof coating material. The lower edge of the fireproof coating material is overlapped with the back surface of the exterior wall material, and the upper edge is overlapped with the lower surface of the floor slab and fastened, so that a composite fireproof coating structure (synthetic fireproof coating structure) in which the exterior wall material, the fireproof coating material, and the floor slab are continuous can be formed.

[0007] In addition, in the fireproof coating construction methods (2) to (4) above, a sheet-shaped fireproof coating material that foams and expands by heat may be used instead of the mat-shaped fireproof coating material or in combination with the mat-shaped fireproof coating material (for example, Patent Documents 3, 4, 5, 7, etc.).

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

Summary of the Invention

Problems to be Solved by the Invention

[0009] Among the conventional fireproof coating methods, the spraying method of (1) requires curing around the spraying location and has the inconvenience that it cannot be constructed without a professional technician. In comparison, the methods of (2) to (4) using a mat-shaped or sheet-shaped fireproof coating material have the advantage that the fireproof coating material can be easily cut into a desired shape using scissors or a cutter. However, in order to fix the fireproof coating material around the steel frame members, cumbersome processes such as welding attachment pins to the steel frame members using special tools or processing incombustible plate materials serving as a fixing base to match the size of the steel frame members and attaching them around the steel frame members are required. Also, electric tools such as an electric driver or a tacker are required for the work of fastening the fireproof coating material.

[0010] The invention disclosed in the present application is made to improve such construction circumstances, and in particular, a fixing structure of a fireproof coating material that can be easily fastened to a steel beam without cumbersome processes or electric tools at the site for surrounding a steel beam on the outer periphery disposed at a portion where an outer wall material and a floor slab meet orthogonally, and a fixing metal fitting used for the fixing structure are provided as specific problems to be solved.

[0011] Furthermore, the invention disclosed in the present application can apply a fireproof coating material not only to steel beams but also to steel columns and other structural materials, and is applicable to the construction of not only fireproof coating materials but also heat insulating materials, airtight materials, moisture-proof materials, sound-absorbing materials, and other coating materials formed in a flexible mat shape, and provides a fixing structure of a coating material and a fixing metal fitting.

Means for Solving the Problems

[0012] In order to achieve the foregoing object, the fixing structure of the coating material adopted by the invention disclosed in the present application is a structural member made of a shaped steel including at least a pair of flanges parallel to each other and a web connecting the pair of flanges. It includes a thick coating material that covers at least one side abdomen surrounded by the pair of flanges and the web, a thin coating material thinner than the thick coating material applied to the outer surface of at least one of the pair of flanges, and a fixing fitting mounted on the thick coating material and the thin coating material from the tip side of the one flange. The thick coating material is formed by a flexible mat-shaped coating material having a cross-sectional dimension larger than the inner dimension of the side abdomen and filled in the side abdomen in a compressed state. The fixing fitting includes a flat adhering piece pressed against the surface of the thin coating material, a holding piece refracted and extended from one end edge of the adhering piece toward the thick coating material side, and a piercing piece extended from the tip of the holding piece toward the adhering piece side and pierced into the thick coating material. The fixing fitting is shaped so that the distance between the tip edge of the piercing piece and the adhering piece can be elastically enlarged. The thick coating material and the thin coating material are elastically sandwiched between the piercing piece and the adhering piece in a state of surrounding the one flange, and are respectively fixed to the side abdomen of the structural member and the outer surface of the one flange.

[0013] Furthermore, in this fixing structure of the coating material, a slit into which the one flange can be inserted is formed near one end edge of the thick coating material. With the one flange inserted into the slit, the thick coating material is filled in the side abdomen. As a result, the outer portion of the slit in the thick coating material is covered on the outer surface of the one flange, and the thin coating material is fixed by the fixing fitting in a state of being applied to the outer surface of the one flange so as to be continuous with or overlap the outer portion without a gap.

[0014] Furthermore, as a specific embodiment of the fixing structure of this coating material, it is possible to specify a case where the structural material is a beam made of H-shaped steel, one of the flanges is the lower flange of the beam, and the thick coating material is a refractory coating material formed by laminating inorganic fibers into a mat shape with a predetermined thickness.

[0015] Furthermore, the beam is an outer peripheral beam arranged along the outer peripheral portion of the steel frame building, an outer wall material is built on the outside of the beam, and the thin coating material overlapped on the lower surface of the lower flange of the beam is bent between the lower flange of the beam and the outer wall material and extended continuously to the back surface of the outer wall material.

[0016] In addition, the fixing metal fitting used for the fixing structure of the above-described coating material includes a flat attaching piece pressed against the surface of the thin coating material, a holding piece refracted and extended from one edge of the attaching piece toward the thick coating material side, and a piercing piece extended from the tip of the holding piece toward the attaching piece side and pierced into the thick coating material. The holding piece is curved in an arc shape with the attaching piece side as a concave surface, and the intersection angle of the virtual plane from the connection edge with the attaching piece to the connection edge with the piercing piece with respect to the attaching piece is an acute angle, and is shaped so as to be elastically deformable at least on the expanding side. The piercing piece extends from the connection edge with the holding piece toward the other edge side of the attaching piece, and a pointed tip portion with a barb is formed at the tip edge thereof.

[0017] A latching claw that protrudes obliquely toward the holding piece side may be formed at the middle portion of the attaching piece.

[0018] In addition, it is more preferable that one edge of the attaching piece extends between the lower flange of the beam and the outer wall material, and a pressing piece curved along the bending portion of the thin coating material is formed at one edge thereof.

Advantages of the Invention

[0019] According to the fixing structure of the coating material and the fixing metal fitting configured as described above, the coating material that surrounds a beam or other structural material can be efficiently fixed to the structural material in a very simple process without requiring the skills of a professional craftsman or using special fasteners, tools, etc. This significantly improves the constructability at the construction site.

[0020] The fixing metal fitting can be inexpensively manufactured, for example, by bending a strip-shaped thin spring steel plate into a substantially J shape in a side view, and it is also easy to handle. Furthermore, since the fixing metal fitting is mounted so as not to directly contact the structural material, even if the fixing metal fitting is heated during a fire, the transfer of its heat to the beam can be suppressed.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

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

[0023] FIGS. 1 and 2 show a fixing structure of a coating material that coats the periphery of a beam arranged along the outer peripheral portion of a steel-frame building with two types of coating materials having different thicknesses, and FIG. 3 shows a configuration example of a fixing metal fitting for fixing those fireproof coating materials.

[0024] The exemplary beam 1 is made of an H-shaped steel, and a floor slab 2 made of, for example, an ALC (autoclaved lightweight concrete) panel or the like is placed on its upper surface. Further, on the outdoor side of the beam 1, a panel-shaped outer wall material 3 made of, for example, a cement-based material or a ceramic-based material is attached. These floor slab 2 and outer wall material 3 each exhibit a predetermined fire resistance performance during a fire. The outer wall material 3 is built in by engaging the outer wall material fixtures 31, 32 attached to the back surface of the outer wall material 3 with long rail members 41, 42 made of angle steel, deformed C-shaped steel, etc., which are coupled to the flanges 11, 12 on the outdoor side of the beam 1 via carrying brackets. The gap formed between the edge portion of the floor slab 2 and the outer wall material 3 is filled with a heat insulating material 5 made of, for example, a glass wool mat. Note that the invention disclosed in the present application does not particularly limit the fixing means of the floor slab 2 and the outer wall material 3.

[0025] Around this beam 1, a fire-resistant coating is applied over the range from the portion in contact with the lower surface of the floor slab 2 to the back surface of the outer wall material 3. The fire-resistant coating includes a thick coating material 6 that covers the recess inner space (in the invention disclosed in the present application, this space is referred to as the "side abdomen 14" of the beam 1.) that is U-shapedly surrounded by the upper flange 11, the web 13, and the lower flange 12 of the beam 1 and opens to the side of the beam 1, a thin coating material 7 that extends from the lower surface of the lower flange 12 of the beam 1 to the back surface of the outer wall material 3, and a fixing fitting 8 that fixes both of these coating materials 6, 7 to the lower flange 12 of the beam 1. Hereinafter, these will be described in detail.

[0026] In the exemplary embodiment, the thick coating material 6 is a refractory coating material formed by laminating inorganic fibers such as rock wool, ceramic fiber, glass wool, and asbestos to a thickness that meets the fire resistance standard and molding them into a flexible mat shape. This thick coating material 6 is prepared in advance so that its cross-sectional dimensions are slightly larger than the inner dimensions of the inner side abdomen 14 of the beam 1. Specifically, the thickness D of the thick coating material 6 is formed to exceed the overhanging width w of the upper flange 11 and the lower flange 12 in the inner side abdomen 14 of the beam 1 (when the overhanging widths of both flanges 11 and 12 are different, the larger one), or a plurality of sheets are laminated and adhered, and its height H is cut so as to exceed the height h of the web 13. When this thick coating material 6 is filled in the inner side abdomen 14 of the beam 1 in a compressed state, it is self-supportingly held in the side abdomen 14 by the resilient elasticity against the vertical compression. Further, a bulging portion that slightly protrudes from the side abdomen 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 notch stepped portions (not shown) that cover the end faces of the upper flange 11 and the lower flange 12 of the beam 1 in advance may be formed at the upper and lower edge ends of the thick coating material 6.

[0027] The thin coating material 7 is also a mat-shaped refractory coating material made of the same material as the thick coating material 6, but is formed so that its thickness is relatively smaller than that of the thick coating material 6 (about 1 / 4 to 1 / 2 of the thickness of the thick coating material 6 as a guide). This thin coating material 7 is laid on the entire lower surface of the lower flange 12 of the beam 1, extends further to the outdoor side, bends between the beam 1 and the outer wall material 3, and is extended so as to be continuous to below the back surface of the outer wall material 3.

[0028] The fixing fitting 8 is a member formed by, for example, bending a strip-shaped thin spring steel plate into a substantially J shape in a side view. The fixing fitting 8 includes a flat attaching piece 81 that is laid on the surface of the thin coating material 7 from below, a holding piece 82 that is refracted and extended from one end edge on the indoor side of the attaching piece 81 toward the thick coating material 6, and a piercing piece 83 that extends from the tip of the holding piece 82 toward the attaching piece 81 side and pierces the thick coating material 6.

[0029] The holding piece 82 is curved in a loose arc shape with the side of the attaching piece 81 being a concave surface, and the intersection angle θ of the virtual plane from the connection edge with the attaching piece 81 to the connection edge with the piercing piece 83 with respect to the attaching piece 81 is an acute angle (generally 60 degrees or more and less than 90 degrees), and it is shaped so that the intersection angle θ can be elastically deformed at least on the expanding side. Further, the piercing piece 83 is not parallel to the attaching piece 81, but extends obliquely in a direction approaching the other end edge side of the attaching piece 81 from the connection edge with the holding piece 82, and a substantially arrow-shaped pointed tip 85 having a barb 84 is formed at its leading edge.

[0030] This fixing fitting 8 is applied to the thick coating material 6 and the thin coating material 7 from the tip side (indoor side) of the lower flange 12 of the beam 1. While pressing the attaching piece 81 against the lower surface of the thin coating material 7, the piercing piece 83 is lifted, and its pointed tip 85 is pierced into the thick coating material 6. Then, due to the elasticity of the leading edge of the piercing piece 83 returning to the side of the attaching piece 81, the lower part of the thick coating material 6 and the thin coating material 7 are pressed against the upper and lower sides of the lower flange 12 so as to wrap the lower flange 12 of the beam 1. Since a barb 84 is formed at the leading edge of the piercing piece 83, the fixing fitting 8 pierced into the thick coating material 6 is firmly held so that it does not easily fall off. In this way, a fireproof coating is obtained in which the coating materials stacked above and below the lower flange 12 of the beam 1 are elastically sandwiched from above and below by the fixing fitting 8.

[0031] FIG. 4 shows a modified example of the fixing structure of the covering material for the same part as described above, and FIG. 5 shows an example of the fixing fitting 8 used for the fixing structure of FIG. 4. In the exemplary embodiment, 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 their stretching forms are slightly different. That is, the thick covering material 6 is cut so as to be larger in height than in the above-described embodiment, and a slit 61 into which the lower flange 12 of the beam 1 can be inserted is formed in the vicinity of the lower end edge thereof. Then, the thick covering material 6 is filled in a compressed state on the side abdomen 14 of the beam 1 by inserting the lower flange 12 into the slit 61. By arranging the thick covering material 6 on the side abdomen 14 of the beam 1 in such a form, the end face of the lower flange 12 is completely covered by the outer portion 62 of the slit 61, and the holding state of the thick covering material 6 on the side abdomen 14 of the beam 1 is further strengthened.

[0032] On the other hand, the thin covering material 7 is applied to the lower flange 12 so as to shorten the extension to the indoor side, and is arranged so as to be substantially the same thickness as the outer portion 62 of the slit 61 of the thick covering material 6 and to be continuous without a gap. That is, in this form, 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 have substantially the same thickness. Then, in the same manner as in the above-described embodiment, while pressing the thin covering material 7 and the outer portion 62 of the thick covering material 6 upward with the abutting piece 81 of the fixing fitting 8, the piercing piece 83 is lifted, and when the pointed tip portion 85 thereof is pierced into the thick covering material 6, due to the elasticity that the leading edge of the piercing piece 83 returns to the side of the abutting piece 81, the thick covering material 6 and the thin covering material 7 are fixed in a state of wrapping the lower flange 12 of the beam 1. Since a return 84 is formed at the leading edge of the piercing piece 83, the fixing fitting 8 pierced into the thick covering material 6 is firmly held so as not to easily fall off.

[0033] Furthermore, in this embodiment, a latching claw 86 that protrudes obliquely toward the holding piece 82 is formed on the attaching piece 81 of the fixing fitting 8 by, for example, cutting and raising the middle portion of the attaching piece 81 into a substantially V shape. When the piercing piece 83 of the fixing fitting 8 is pierced into the thick coating material 6, the latching claw 86 is latched near the edge of the thin coating material 7, and by pulling the thin coating material 7 toward the indoor side, the thin coating material 7 is made difficult to separate from the lower flange 12.

[0034] Also, in this embodiment, one end edge of the attaching piece 81 of the fixing fitting 8 extends slightly long so as to reach between the lower flange 12 of the beam 1 and the outer wall member 3, and a pressing piece 87 that curves downward in a substantially 1 / 4 arc shape is formed at the one end edge. The pressing piece 87 is arranged along the bending portion of the thin coating material 7 that extends continuously from the lower surface of the lower flange 12 of the beam 1 to the back surface of the outer wall member 3, and serves to maintain the extended state of the thin coating material 7.

[0035] As described above, the mat-like thick coating material 6 is filled in the side abdomen 14 of the beam 1 in a compressed state, the thin coating material 7 is applied to the lower surface of the lower flange 12, and while pressing the attaching piece 81 of the fixing fitting 8 against the thin coating material 7, the piercing piece 83 is pierced into the thick coating material 6, whereby the thick coating material 6 and the thin coating material 7 are fixed in a state of surrounding the lower flange 12. By adopting such a coating material fixing structure and the fixing fitting 8, the mat-like coating material surrounding the beam 1 can be efficiently fastened in a very simple process without requiring the skills of a professional craftsman and without using special fasteners or tools. Since the fixing fitting 8 is mounted so as not to directly contact the beam 1, even if the fixing fitting 8 is heated during a fire, the transfer of its heat to the beam 1 is suppressed. Also, by covering the lower surface of the beam 1 with the thin coating material 7, it becomes easy to secure a ventilation space between the lower side of the beam 1 and the outer wall member 3.

[0036] In each of the above-described embodiments, as the thin coating material 7, a sheet-shaped refractory coating material that foams and expands by heat can also be adopted. Further, in the embodiment shown in FIG. 4, the thin coating material 7 is arranged such that the edge of the thin coating material 7 overlaps the outer portion 62 of the thick coating material 6 that covers the lower surface of the lower flange 12 of the beam 1, and the fixing metal fitting 8 may be attached so that the lower surface of the overlapping portion is pressed by the attaching piece 81 of the fixing metal fitting 8. Further, at a portion where it is necessary to cover both side surfaces of the beam 1, the thick coating material 6 is compression-filled into the side abdominal portions 14 on both sides, the thin coating material 7 is applied to the lower surface of the beam 1, and the fixing metal fittings 8 can be attached and fixed so as to face each other from both sides of the beam 1.

[0037] The invention disclosed in the present application is applicable not only to the beam 1 but also to a fireproof coating method for columns and other structural materials made of H-shaped steel or the like, by replacing the lateral direction with the vertical direction or the like. In the invention disclosed in the present application, in the cross-section perpendicular to the material axis of a structural material composed of H-shaped steel or similar I-shaped steel, grooved steel without lips, combined steel materials formed by joining two grooved steels back to back, etc., the two flat plate-like portions that protrude in the direction perpendicular to the strong axis direction (the direction in which the main bending load acts) (weak axis direction) are referred to as "flanges 11, 12", and the plate-like portion that joins the two flanges 11, 12 in the weak axis direction is referred to as the "web 13".

[0038] Furthermore, not only for refractory coating materials, but also for the construction of heat insulating materials, airtight materials, moisture-proof materials, sound-absorbing materials, interior base materials, and other coating materials having appropriate thickness and flexibility, it can be similarly applied. In that case, the dimensions and shapes of each part of the fixing metal fitting are appropriately changed according to the thickness and material of the coating material.

[0039] In addition, the embodiments and other matters disclosed in this specification can also be grasped as the technical ideas shown in the following supplementary notes. (Supplementary Note 1) In a structural material made of a shaped steel having at least a pair of flanges parallel to each other and a web that joins the pair of flanges, a thick coating material that covers at least one side abdominal portion surrounded by the pair of flanges and the web, A thin coating material thinner than the thick coating material, which is applied to the outer surface of at least one of the pair of flanges, A fixing metal fitting attached to the thick coating material and the thin coating material from the tip side of the one flange, A fixing structure of the coating material comprising: The thick coating material is formed by forming a mat-shaped coating material having flexibility into a cross-sectional dimension larger than the inner dimension of the side abdomen and filling the side abdomen in a compressed state, The fixing metal fitting includes a flat attaching piece pressed against the surface of the thin coating material, a holding piece refracted and extending from one end edge of the attaching piece toward the thick coating material side, and a piercing piece extending from the tip of the holding piece toward the attaching piece side and pierced into the thick coating material, and is shaped so that the interval between the tip edge of the piercing piece and the attaching piece can be elastically expanded, The thick coating material and the thin coating material are elastically sandwiched between the piercing piece and the attaching piece in a state of surrounding the one flange, and are respectively fixed to the side abdomen of the structural material and the outer surface of the one flange A fixing structure of the coating material, characterized in that. (Appendix 2) In the fixing structure of the coating material described in Appendix 1, A slit into which the one flange can be inserted is formed near one end edge of the thick coating material, With the one flange inserted into the slit, the thick coating material is filled in the side abdomen, so that the outer portion of the slit in the thick coating material is covered on the outer surface of the one flange, and The thin coating material is fixed by the fixing metal fitting in a state of being applied to the outer surface of the one flange so as to be continuous with or overlap the outer portion of the slit without a gap. A fixing structure of the coating material, characterized in that. (Appendix 3) In the fixing structure of the coating material described in Appendix 1 or Appendix 2, The structural material is a beam made of H-shaped steel, The one flange is the lower flange of the beam, The fixing structure of the coating material, characterized in that the thick coating material is a refractory coating material formed by laminating inorganic fibers into a mat shape with a predetermined thickness. (Appendix 4) In the fixing structure of the coating material described in Appendix 3, the beam is an outer peripheral beam arranged along the outer peripheral part of the steel frame building, an outer wall material is built on the outside of the beam, the thin coating material overlapped on the lower surface of the lower flange of the beam is bent between the lower flange of the beam and the outer wall material and extended continuously to the back surface of the outer wall material characterized in that it is the fixing structure of the coating material. (Appendix 5) A fixing fitting used for the fixing structure of the coating material described in any one of Appendices 1 to 4, a flat attaching piece pressed against the surface of the thin coating material, a holding piece refracted from one end edge of the attaching piece and extending toward the thick coating material side, a piercing piece extending from the tip of the holding piece toward the attaching piece side and pierced into the thick coating material, comprising: the holding piece is curved in an arc shape with the attaching piece side as a concave surface, and the intersection angle of the virtual plane from the connection edge with the attaching piece to the connection edge with the piercing piece with respect to the attaching piece is an acute angle, and the intersection angle can be elastically deformed at least on the expanding side. the piercing piece extends from the connection edge with the holding piece toward the other end edge side of the attaching piece, and a pointed tip portion with a barb is formed at its tip edge characterized in that it is the fixing fitting for the coating material. (Appendix 6) In the fixing fitting for the coating material described in Appendix 5, a latching claw protruding obliquely toward the holding piece side is formed in the middle part of the attaching piece characterized in that it is the fixing fitting for the coating material. (Appendix 7) A fixing fitting used for the fixing structure of the coating material described in Appendix 4 or Appendices 5 to 6 citing Appendix 4, One end edge of the attachment piece extends between the lower flange of the beam and the outer wall material, and a pressing piece curved along the bending portion of the thin covering material is formed at one end edge thereof. A fixing metal fitting for a covering material, characterized by the above.

Industrial Applicability

[0040] The invention disclosed in the present application can be widely used as a technique for fixing various covering materials around structural materials in steel frame buildings and the like.

Explanation of Signs

[0041] 1 Beam 11 Upper flange 12 Lower flange 13 Web 14 Side abdomen 2 Floor slab 3 Outer wall material 31, 32 Outer wall material fixing tool 41, 42 Rail member 5 Heat insulating material 6 Thick covering material 61 Slit 62 Outer side portion 7 Thin covering material 8 Fixing metal fitting 81 Attachment piece 82 Holding piece 83 Piercing piece 84 Return 85 Sharp tip 86 Hooking claw 87 Pressing piece

Claims

1. In 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 coating material covering at least one side belly portion surrounded by the pair of flanges and the web, A thin coating material thinner than the thick coating material, which is applied to the outer surface of at least one of the pair of flanges, A fixing fitting attached to the thick coating material and the thin coating material from the tip side of the one flange, A fixing structure of a coating material, comprising: The thick coating material is formed by forming a mat-shaped coating material having flexibility into a cross-sectional dimension larger than the inner dimension of the side belly portion and filling the side belly portion in a compressed state, The fixing fitting includes a flat attaching piece pressed against the surface of the thin coating material, a holding piece refracted and extending from one edge of the attaching piece toward the thick coating material side, and a piercing piece extending from the tip of the holding piece toward the attaching piece side and piercing the thick coating material, and is shaped so that the interval between the tip edge of the piercing piece and the attaching piece can be elastically enlarged, The thick coating material and the thin coating material are elastically sandwiched between the piercing piece and the attaching piece in a state of surrounding the one flange, and are respectively fixed to the side belly portion of the structural member and the outer surface of the one flange A fixing structure of a coating material, characterized in that.

2. In the fixing structure of the coating material according to Claim 1, A slit into which the one flange can be inserted is formed near one edge of the thick coating material, With the one flange inserted into the slit, the thick coating material is filled in the side belly portion, so that the outer portion of the slit in the thick coating material is covered on the outer surface of the one flange, and The thin coating material is fixed by the fixing fitting in a state of being applied to the outer surface of the one flange so as to be continuous with or overlap the outer portion of the slit without a gap. A fixing structure of a coating material, characterized in that.

3. In the fixing structure of the coating material according to Claim 1 or Claim 2, The structural member is a beam made of H-shaped steel, The one flange is the lower flange of the beam, A fixing structure of a coating material, characterized in that the thick coating material is a refractory coating material formed by laminating inorganic fibers into a mat shape with a predetermined thickness.

4. In the fixing structure of the coating material according to Claim 3, The beam is an outer peripheral beam arranged along the outer peripheral portion of the steel frame building, an outer wall material is built on the outside of the beam, a thin covering material overlapped on the lower surface of the lower flange of the beam is bent between the lower flange of the beam and the outer wall material and extended continuously to the back surface of the outer wall material A fixing structure of a covering material, characterized in that.

5. A fixing fitting used for the fixing structure of the covering material according to claim 1 or claim 2, a flat attaching piece pressed against the surface of the thin covering material, a holding piece refracted and extended from one end edge of the attaching piece toward the thick covering material side, a piercing piece extending from the tip of the holding piece toward the attaching piece side and pierced into the thick covering material, comprising the holding piece is curved in an arc shape with the attaching piece side as a concave surface, and the intersection angle of the virtual plane from the connection edge with the attaching piece to the connection edge with the piercing piece with respect to the attaching piece is an acute angle, and is shaped so that the intersection angle can be elastically deformed at least on the expanding side, the piercing piece extends from the connection edge with the holding piece toward the other end edge side of the attaching piece, and a pointed tip with a barb is formed at its tip edge A fixing fitting for a covering material, characterized in that.

6. In the fixing fitting for a covering material according to claim 5, a latching claw protruding obliquely toward the holding piece side is formed at the middle part of the attaching piece A fixing fitting for a covering material, characterized in that.

7. A fixing fitting used for the fixing structure of the covering material according to claim 4, a flat attaching piece pressed against the surface of the thin covering material, a holding piece refracted and extended from one end edge of the attaching piece toward the thick covering material side, a piercing piece extending from the tip of the holding piece toward the attaching piece side and pierced into the thick covering material, comprising the holding piece is curved in an arc shape with the attaching piece side as a concave surface, and the intersection angle of the virtual plane from the connection edge with the attaching piece to the connection edge with the piercing piece with respect to the attaching piece is an acute angle, and is shaped so that the intersection angle can be elastically deformed at least on the expanding side, the piercing piece extends from the connection edge with the holding piece toward the other end edge side of the attaching piece, and a pointed tip with a barb is formed at its tip edge, one end edge of the attaching piece extends between the lower flange of the beam and the outer wall material, and a pressing piece curved along the bending portion of the thin covering material is formed at one end edge thereof A fixing fitting for a covering material, characterized in that.

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