JP2020012355A - Metal fixture for blocking between fire proof layers - Google Patents

Abstract

To provide a metal fixture capable of arranging a thin band steel plate arranged in a gap between an outer wall material and a concrete slab stably and of fixing it rigidly as well.SOLUTION: A metal fixture is provided that is arranged in a gap between an outer wall material and a concrete slab to fix a thin band steel plate used for blocking between fire proof layers, and a transverse wall part hung on an upper surface of the concrete slab, a vertical wall part extending from the transverse wall part along the side surface of the concrete slab and a substantially V-shaped horizontal support piece at a lower end of the vertical wall part are provided and the metal fixture is elastically inserted into the gap between the outer wall material and the concrete slab to support the thin band steel plate by the metal fixture.SELECTED DRAWING: Figure 1

Description

  This invention uses fire-resistant specifications for curtain wall construction to prevent fire spread to the upper floors and the rise of smoke, so that a thin steel plate is used in the gap between the outer wall material and the concrete slab, and mortar, rock wool, etc. The present invention relates to a metal fitting for fixing the thin steel sheet in a closing step, that is, a so-called interlayer covering.

  Conventionally, mortar or rock wool has been filled as an interlayer covering of a structure using an outer wall material, but as a metal fitting for receiving the filler, Japanese Utility Model Laid-Open No. 04-111857 (Patent Document 1) and Japanese Utility Model Laid-Open No. 06-67628. As disclosed in Patent Document 2 and Japanese Patent Application Laid-Open No. 2002-242334 (Patent Document 3), a round steel plate or a thin steel plate is bent, and a horizontal wall portion to be hooked on an upper surface of a concrete slab, and concrete from the horizontal wall portion. A support fitting is disclosed which includes a vertical wall portion along the side surface of the slab and a support portion extending obliquely upward from the vertical wall portion and elastically abutting on the outer wall material.

  In addition, recently, in order to improve the fire resistance of the structure particularly in the curtain wall method, a specification in which a thin steel sheet is laid below the mortar or rock wool to be filled has begun to be adopted. As shown in 4), a panel-side supporting side (supporting piece) for supporting a metal plate material (a thin steel plate) disposed in a gap (gap) is formed on a vertical wall portion of the interlayer refractory material supporting metal fitting (the supporting metal fitting). The disclosed supporting bracket (fixing bracket) is disclosed. In Patent Literature 4, the support piece extends obliquely upward from the lower end of the hanger portion of the support fitting, and the tip end of the support piece elastically abuts the wall panel (outer wall material), thereby preventing displacement of the gap width. The tip of the support piece moves up and down along the outer wall material to follow. Further, the thin steel sheet is bridged between the supporting portion provided on the vertical wall portion and the outer wall material, and the outer wall material side of the thin steel sheet follows the displacement of the gap width by moving up and down along the outer wall material. It has become.

No.04-111857 No.06-67628 JP-A-2002-242334 JP 2010-261232A

  Generally, when an interlayer displacement occurs in a building due to an earthquake or the like and a displacement occurs even temporarily even in a width of a gap between an outer wall material and a concrete slab, a gap or a gap may occur in a thin steel sheet. In such a case, in Patent Literature 4, the tip of the support piece and the outer wall material side of the thin steel plate slide in the vertical direction on the surface of the outer wall material with respect to the displacement of the gap width. However, the followability of the vertical movement may be insufficient. As a result, the fire resistance may be affected.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a fixing bracket for stably disposing a thin steel plate disposed in a gap between an outer wall material and a concrete slab, and for firmly fixing the thin steel plate. Is to do.

  As a means thereof, a first invention of the present invention is a fixture for fixing a thin steel plate used as a fireproof interlayer covering, which is disposed in a gap between an outer wall material and a concrete slab. A horizontal wall portion, a vertical wall portion extending from the horizontal wall portion along a vertical surface of the concrete slab, and a horizontal support piece having a substantially V-shape in the horizontal direction. It is characterized in that it has a fixed portion integrally fixed to a lower portion of the wall portion, and has a contact portion at each of both ends which elastically contacts the outer wall material in a horizontal direction.

  In the first invention, a substantially V-shaped horizontal portion including a fixing portion integrally fixed to a lower portion of the vertical wall portion in the middle, and contact portions elastically contacting the outer wall material in the horizontal direction at both ends. The support piece is disposed in the gap, and is elastically supported by being brought into contact with the concrete slab and the outer wall material by one fixed portion and two contact portions. In the thin steel sheet, the end on the outer wall material side is supported on the upper part of the abutting part of the horizontal support piece, and the end on the concrete slab side is leaning on the vertical wall part, corresponding to the displacement of the gap The surface of the vertical wall can be slid up and down,

  According to a second aspect of the present invention, in the first aspect, a holding piece for holding the thin steel plate from above is provided on the vertical wall portion or the horizontal support piece.

  In the second invention, since the thin steel plate is pressed by the holding piece, it is possible to prevent the thin steel plate from being lifted and fixed.

  A third invention is characterized in that, in the first invention, a bent piece that can be bent in a vertical direction is provided on an upper portion of the vertical wall portion.

  In the third aspect of the present invention, by bending the bent piece, the thin steel plate can be elastically pressed from the upper side, and can be prevented from floating.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the horizontal support piece is made of one vertical plate material, and a thickness portion of the vertical plate material becomes upper and lower surface portions in a thickness direction. The horizontal section is formed substantially in a V-shape, the abutting portion elastically abuts the outer wall portion in the horizontal direction, and the thin strip steel sheet is Is mounted and supported on the upper surface of the outer wall portion so as to follow the displacement of the gap width and to elastically slide the surface of the outer wall portion horizontally in a direction in which the two corresponding contact portions approach or separate from each other. It is characterized by being provided

  In the fourth invention, the two corresponding contact portions of the horizontal support piece follow the displacement of the gap and elastically slide in directions approaching or separating from each other in the horizontal direction, and support the thin steel sheet in the vertical direction. It is a configuration and can be reliably supported.

According to the fixing bracket for covering the fireproof interlayer of the present invention, the fixing portion of the horizontal support piece is fixed to the vertical wall portion by press-fitting the fixing bracket into the gap between the outer wall material and the concrete slab. Since each of the two contact portions elastically abuts the outer wall material in the horizontal direction, the fixing bracket itself can be fixed at a predetermined height position.
In particular, even if an interlayer displacement occurs in a building due to an earthquake or the like, the building can be reliably supported by following the interlayer displacement. In addition, since it is possible to reliably support, it is possible to solve the above-mentioned conventional problems, such as being able to reliably maintain fire resistance.

It is a perspective view showing Embodiment 1 of the present invention. It is a side view showing Embodiment 1 of the present invention. It is sectional drawing which shows the use condition of Embodiment 1 of this invention. FIG. 2 is a perspective view illustrating a use state of the first embodiment of the present invention. FIG. 2 is a diagram corresponding to FIG. 1 according to a second embodiment of the present invention. FIG. 3 is a diagram corresponding to FIG. 1 according to a third embodiment of the present invention. FIG. 4 is a diagram corresponding to FIG. 3 according to a third embodiment of the present invention. FIG. 6 is a diagram corresponding to FIG. 1 according to a fourth embodiment of the present invention. FIG. 4 is a diagram corresponding to FIG. 3 according to a fourth embodiment of the present invention. FIG. 7 is a diagram corresponding to FIG. 3 according to a fifth embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The description of the preferred embodiments below is merely exemplary in nature and is not intended to limit the invention, its applications, or its uses.

(Embodiment 1)
Embodiment 1 of the present invention will be described in detail with reference to FIGS. As shown in FIG. 3, reference numeral 1 denotes a fixing bracket which is installed so as to hang down from the upper part A1 of the concrete slab A to the side surface A2 and is inserted into the gap S between the outer wall material B and the concrete slab A. C is a thin steel plate that is inserted into the gap S from above the fixture 1, is placed on the fixture 1, and is used as a fireproof interlayer plug of the gap S. D is a refractory material such as mortar or rock wool that is inserted into the gap S from above the thin steel sheet C and is used as an interlayer covering of the gap S.
As shown in FIG. 4, the vertical wall portion 11 and the horizontal support piece 12 of the fixing bracket 1 are inserted into the gap S, and the plurality of fixing brackets 1 are arranged at predetermined intervals. A thin steel plate C is inserted from above the gap S and placed over the plurality of fixing brackets 1. At this time, the end C1 on the outer wall side of the thin steel plate C is placed on the contact portion between the upper surface of the abutting portion 15 and the surface of the outer wall B, and the end C2 on the concrete slab side is higher than the end C1. By leaning on an arbitrary surface of the vertical wall portion 11 at a high position, it does not fall down.

  As shown in FIGS. 1 and 2, reference numeral 10 denotes a lateral wall of the fixing bracket 1, which is hung on the upper surface A <b> 1 of the concrete slab to prevent the fixing bracket 1 from sinking downward. Numeral 11 denotes a vertical wall hanging down from the horizontal wall 10 along the side surface A2 of the concrete slab A. Numeral 12 denotes a horizontal support piece attached to a lower end of the vertical wall 11 by welding.

  The horizontal support piece 12 is made of one vertical plate material, and a thin plate thickness portion of the vertical plate material is disposed horizontally as upper and lower surface portions, and the vertical plate material is horizontally bent in a plate thickness direction to form a horizontal cross section. Are formed in a substantially V-shape. As a result, the horizontal support piece 12 includes the fixing portion 13 at the lower end of the vertical wall portion 11 in the middle of the vertical plate material in the width direction, and has a substantially V shape from the left and right ends of the fixing portion 13 toward the outer wall portion B. Each of the elastic support portions 14 is provided with a contact portion 15, 15 which elastically abuts on the outer wall material B in the horizontal direction. The horizontal support piece 12 is provided so as to follow the displacement of the gap width and to elastically slide the surface of the outer wall B horizontally in the direction in which the two contact portions 15 approach or separate from each other. I have.

  The fixing portion 13 is formed of a flat plate having a width slightly smaller than the width of the vertical plate portion 11, and is integrally fixed to a lower end of the vertical wall portion 11 by welding or the like. The elastic support portions 14 extend smoothly from both left and right ends of the fixed portion 13 toward the outer wall portion B. In particular, at the portion 14a where the fixed portion 13 smoothly bends to the elastic support portion 14, the upper surface of the elastic support portion 14 is slightly lower than the upper surface of the fixed portion 13 and is smoothly bent.

  In the thin steel plate C, the end C1 on the outer wall material side is supported on the upper part of the contact portion 15 of the horizontal support piece 12, and the end C2 on the concrete slab side is held by the vertical wall portion 11, and the gap S can slide up and down on the surface of the vertical wall portion 11 in response to the displacement of S.

  As described above, in the first embodiment, the fixing portion 13 of the horizontal support piece 12 and the two contact portions 15 contact the outer wall material B and the concrete slab A to elastically support the outer wall material. By press-fitting the fixture 1 into the gap S between B and the concrete slab A, the fixture 1 itself can be stably fixed at a predetermined height position. In particular, since the fixed portion 13 of the horizontal support piece 12 and the two contact portions 15 are supported at three points, the support can be stably performed.

  Further, the two contact portions 15, 15 of the horizontal support piece 12 made of the vertical plate material elastically move in the direction of approaching or separating from each other following the displacement of the gap S, so that the outer wall material B and the concrete slab are moved. When the gap S with A is widened, it is only necessary to expand the two contact portions 15a, 15a in the horizontal direction, and it is not necessary to lengthen the vertical wall portion 11 in the height direction. The fixture 1 can be fixed without affecting the depth of S.

(Embodiment 2)
Embodiment 2 will be described with reference to FIG. In the second embodiment, only the portions different from the first embodiment will be described, and the description of the common portions will be omitted. The second embodiment differs from the first embodiment in the configuration of the contact portion 151. At the tip of the contact portion 151, a contact portion 151a that is smoothly bent outward is provided. By providing the contact portion 151a, the contact portion 151 can easily slide smoothly in the horizontal direction. Further, even if the distance S is displaced and the positions of the two contact portions 15 approach or separate from each other, the contact portions 151a are provided with smooth curved surfaces, so that the contact portions 151a can stably contact the surface of the outer wall material B. Thus, it is possible to reliably hold the fixture 1 in the gap S between the contact portions 151a. In addition, when the gap S is displaced, the contact portion 151a can smoothly slide the surface of the outer wall material B in the horizontal direction, and can quickly follow the displacement of the gap S.

(Embodiment 3)
Embodiment 3 will be described with reference to FIGS. 6 and 7. In the third embodiment, only the portions different from the first embodiment will be described, and the description of the common portions will be omitted. The third embodiment is different from the first embodiment in that a holding piece 20 for holding the thin steel sheet C is provided.
In the third embodiment, the center bent piece 21 is formed by providing a cut in the widthwise middle portion of the vertical wall portion 11 from the middle position in the vertical direction to a portion of the horizontal wall portion 10 through the upper position. The center bent piece 21 is bent as shown in FIG. 7 to press the upper surface of the thin steel sheet C and use it as the pressing piece 20. Since the strip steel sheet C is pressed by the presser piece 20, it can be fixed while preventing the strip steel sheet C from floating.

  In addition, as the fireproof specification of the structure by the curtain wall method, since the thin steel sheet C is provided to prevent the spread of fire to the upper floor and the rise of smoke, even if the thin steel sheet C rises a little, Since it is only necessary to prevent the spread of fire to the floor and the rise of smoke, it is not always necessary to make contact with the upper surface of the strip steel sheet C when the central bent piece 21 is bent.

(Embodiment 4)
Embodiment 4 will be described with reference to FIGS. 8 and 9. In the fourth embodiment, only parts different from the first embodiment will be described, and description of common parts will be omitted. The fourth embodiment is different from the first embodiment in that a holding piece 20 for holding the thin steel sheet C is provided.
In the fourth embodiment, cuts are provided at both sides in the width direction of the vertical wall portion 11 from the middle position in the vertical direction to the upper position, and a cut is made outward from the upper end of the cut in the horizontal direction so that the vertical wall portion can be bent in the vertical direction. An end bent piece 22 was formed. The bent end piece 22 is bent as shown in FIG.

  In the fourth embodiment, the thin strip steel plate C can be elastically held from the upper side by bending the bent end piece 22, and the lifting of the thin strip steel plate C can be prevented as in the third embodiment.

In the fourth embodiment, compared to the third embodiment, two end bent pieces 22 are provided for each fixture 1, so that it is possible to more reliably prevent the thin steel plate C from rising.
As another embodiment, a lath of a metal net may be laid instead of laying the thin steel plate C. In this case, the end of the lath to be laid can be engaged with the end bent piece 22 for use without bending the end bent piece 22.

(Embodiment 5)
Embodiment 5 will be described with reference to FIG. In the fifth embodiment, only parts different from the first embodiment will be described, and description of common parts will be omitted. The fifth embodiment differs from the first embodiment in the configuration of the contact portion 152. As in the second embodiment, a contact portion 152a smoothly bent outward is provided at the tip of the contact portion 152. By providing the contact portion 152a, the contact portion 152 can easily slide in the horizontal direction smoothly.

The fifth embodiment differs from the second embodiment in that the contact portion 152 is provided obliquely in the vertical direction. With such an inclination, the upper end portion of the contact portion 152 only comes into contact with the surface of the outer wall portion B, and the contact area of the contact portion 152 is reduced, so that it is easy to slide in the horizontal direction.
In the fifth embodiment, similarly to the fourth embodiment, the end bent pieces 22 are provided to prevent the thin steel sheet C from rising.

(Other embodiments)
In the above embodiment, the horizontal support piece 12 is made of a single vertical plate made of the vertical wall portion 11 and another member, and is provided so as to be integrated by fastening means such as welding. However, the vertical wall portion 11 and the horizontal support piece 12 may be formed by bending a single plate material without using separate members. For example, it is also possible to provide a portion extending outward in the horizontal direction integrally from both sides of the vertical plate portion, and to bend this extended portion to form a horizontal support piece. Further, the horizontal support piece 12 is made of one plate material, but the left and right horizontal support pieces 12 are made of separate plate materials instead of one sheet material, and the fixing portions 13 are overlapped and fixed integrally to the vertical wall portion A2. Alternatively, it is also possible to form a fixed portion having a half width, and butt these as one fixed portion to integrally fix the vertical wall portion.

  Although the vertical plate material is used as the horizontal support piece 12, it is not limited to the vertical plate material, and other configurations may be used as long as they are spring steel.

  The vertical wall portion 11 is provided downward along the side surface of the concrete slab A, but does not necessarily have to be along the side surface. For example, the lower portion of the vertical wall portion 11 is slightly bent slightly in the direction of the outer wall portion B so that a spring force acts, and the fixing portion 13 of the horizontal support piece 12 is fixed to this portion. Is also good.

The end bent piece 22 is bent at a position where it comes into contact with the lower surface of a refractory material such as rock wool to be inserted, and may be used as a guide for inserting the refractory material. (Positions indicated by two-dot chain lines in FIG. 10)
Further, when the lath wire mesh is laid instead of the thin steel plate without bending, the wire mesh may be locked to the bent piece and used.

Note that the holding piece 20 is not limited to a bent piece such as the center bent piece 21 and the end bent piece 22 provided on the vertical wall portion 11. A holding piece for holding the end on the outer wall side of the thin steel plate C may be provided.
In the third and fourth embodiments, the center bent piece 21 and the end bent piece 22 are the holding pieces 20. However, the holding pieces 20 may have other configurations instead of the bent pieces.

Reference Signs List A concrete slab A1 upper side A2 side surface B outer wall material S gap C thin steel plate C1 outer wall material side end C2 concrete slab side end 1 fixing bracket 10 side wall section 11 vertical wall section 12 horizontal support piece 13 fixing section 14 elastic support Part 15 Contact part 20 Holding piece 21 Center bent piece 22 End bent piece

Claims (4)

  A fixing bracket for fixing a thin steel plate used as a fireproof interlayer covering, which is disposed in a gap between an outer wall material and a concrete slab, and a lateral wall portion hanging on an upper surface of the concrete slab; and A vertical wall portion along a vertical surface of the concrete slab, and a horizontal support piece having a substantially V-shaped horizontal direction, wherein the horizontal support piece is integrally fixed to a lower portion of the vertical wall portion in the middle, For fire resistance, it has two elastic support portions that are bent and extended from both left and right ends of the fixing portion toward the outer wall portion, and a corresponding contact portion that comes into contact with the outer wall portion at a tip of the elastic support portion. Interlayer cover fixing bracket.   The fixing bracket according to claim 1, wherein a holding piece for holding the thin steel plate from above is provided on the vertical wall portion or the horizontal support piece.   The fixture according to claim 1, further comprising a bent piece that can be bent in a vertical direction above the vertical wall portion.   In any one of the first to third inventions, the horizontal support piece is made of a single vertical plate, and the plate thickness portion of the vertical plate becomes an upper and lower surface portion and is horizontally bent in the plate thickness direction, The cross section in the horizontal direction is formed in a substantially V shape, the abutting portion elastically abuts the outer wall portion in the horizontal direction, and the thin steel plate is placed on the upper surface of the horizontal support piece. The two corresponding contact portions are provided so as to elastically slide horizontally on the surface of the outer wall portion in a direction approaching or moving away from each other, following the displacement of the gap width. The fixture according to any one of claims 1 to 3, wherein:

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