JP5864791B2 - Brace mounting bracket fixing structure - Google Patents

Description

  The present invention relates to a fixing structure of a brace mounting bracket for connecting an end of a brace to a hanger connected to a lower end of a suspension bolt hanging from a ceiling wall and a ceiling plate support member suspended from the hanger. .

  A lattice-like ceiling plate support member f that supports the ceiling plate p as shown in FIG. 25 is already well known (for example, Patent Document 1). The ceiling plate support member f includes a plurality of main bars g arranged in parallel, and a plurality of cross bars h that are arranged orthogonally between the main bars g and are respectively fixed to both side surfaces of the main bar g. It consists of and.

  More specifically, each of the main bar g and the cross bar h has a substantially inverted T-shaped longitudinal section, and has a vertical side j in the vertical direction, a wide locking ridge i at the upper end of the vertical side j, And a latching edge k projecting to both sides at the lower end of the vertical side portion j. Further, an attachment port is opened on the side surface of the main bar g, and the tip end of the cross bar h is fitted into the attachment port so as to be connected to each other in a cross shape. Then, the main bar g and the cross bar h are sequentially assembled to form a lattice-like ceiling plate support member f as a whole.

  Further, in the ceiling plate support member f, when the ceiling plate p is sequentially mounted on the upper surfaces of the locking edges k of the main bar g and the cross bar h, a large number of ceiling plates p are supported in an aligned manner. As a result, an indoor ceiling is formed.

  Moreover, the above-described ceiling plate support member f is suspended in the following manner with respect to a ceiling wall (not shown) located further above the ceiling. A hanger b as a suspension member is connected to the lower end of the hook-shaped suspension bolt a hanging from the ceiling wall, and the holding bar provided at the lower end of the hanger b includes a main bar g or a cross bar h. Each of the locking ridges i is sandwiched. Thereby, each member will be connected to a perpendicular direction and the ceiling board support member f will be suspended with respect to a ceiling wall. Further, the hanger b is connected to the other end of a brace brace (not shown) whose one end is fixed to the ceiling wall, and even when a horizontal force such as an earthquake acts on the ceiling plate support member f, the ceiling A configuration that can suppress left and right vibrations of the plate support member f has been proposed (for example, Patent Document 2).

  Further, in recent years, when building a ceiling system composed of the ceiling plate p, the ceiling plate support member f, the hanger b, and the like as described above, further improvement in earthquake resistance has been demanded. In order to cope with this, a configuration has been proposed in which a brace mounting bracket 1z is attached to the hanger b and the other end of the brace c is connected to the brace mounting bracket 1z (for example, Patent Document 3). More specifically, the conventional brace mounting bracket 1z is formed by molding a single metal plate as shown in FIG. 26, and is fixed in a U-shape in plan view to be fixed to the hanger b. One piece 3z, flat mounting plate portions 2z, 2z formed on both sides of the fixed piece portion 3z, and a locking ridge of the ceiling plate support member f disposed on the lower edge of each mounting plate portion 2z 27 and 28, the brace mounting bracket 1z is integrally secured to the hanger b and the ceiling plate support member f with a screw d, as shown in FIGS. The other end of the brace c is connected to the mounting plate portion 2z of the brace mounting bracket 1z. In such a configuration, since the connection strength is increased by the surface rigidity of the brace mounting bracket 1z, the detachment of the members can be prevented more reliably than when the brace c is attached to the hanger b. In addition, q in FIGS. 27 and 28 is a ceiling wall.

JP 2004-244890 A JP 2005-282005 A Design Registration No. 1384893

  By the way, as shown in FIG. 26, the conventional brace mounting bracket 1z is provided with the mounting plate portions 2z symmetrically on both sides of the fixed piece portion 3z, and when the brace mounting bracket 1z is mounted, FIG. As shown, braces c can be attached to both sides of the hanger b. However, the brace c is often fixed only to one side of the hanger b as shown in FIG. In such a case, the attachment plate portion 2z on which the brace c is not attached hardly functions. Further, the conventional brace mounting bracket 1z cannot be attached to the hanger b, and the pattern for connecting the brace c is limited.

  The present invention has been made in view of the present situation, and an object of the present invention is to provide a brace mounting bracket that allows various mounting methods compared to the conventional brace mounting bracket and can reduce waste of materials. To do.

In the present invention, a fixing piece for fixing to a hanger connected to a lower end of a suspension bolt, a flat mounting plate for fixing an end of a brace, and a lower edge of the mounting plate are provided. A brace mounting bracket fixing structure comprising an engaging portion for engaging with a ceiling plate support member suspended on a hanger,
The brace mounting bracket includes a single mounting plate portion to which one brace is fixed, an orthogonal portion extending perpendicularly to the plate surface from one side edge of the mounting plate portion, and an end portion of the orthogonal portion A fixed piece portion having a parallel portion bent at 90 ° is coupled to the mounting plate portion, and an engaging portion is coupled to the lower edge of the mounting plate portion. It is screwed onto the hanger with one surface attached to the hanger.

  In addition, the hanger connected to the suspension bolt is provided with a metal fitting fixing portion, and a holding tool for holding the ceiling plate support member is arranged at the lower end. Further, the metal fitting fixing portion includes a plate-like base portion in the vertical direction. Fixing the brace mounting bracket to at least one of the three surfaces formed by the outer surfaces of the base portion and the two extending portions, the two extending portions extending in the orthogonal direction from both side edges of the base portion. Any one surface of the one part can be screwed.

  If the brace mounting bracket of the present invention is attached to one side of the hanger, the end of the brace can be fixed to one side of the hanger. Since this brace mounting bracket has one mounting plate portion, it is about half the size of the conventional brace mounting bracket 1z (see FIG. 26) having two mounting plate portions. In the case of fixing to only one side, the material can be suppressed by using the brace mounting bracket of the present invention.

  As described above, since the brace mounting bracket of the present invention is more compact than the conventional brace mounting bracket 1z (see FIG. 27), when connecting the brace only to one side of the hanger, By using the brace mounting bracket of the invention, the material cost can be suppressed. Moreover, a plurality of brace mounting brackets of the present invention can be mounted on a hanger, and a plurality of braces can be mounted in various manners by combining a plurality of brace mounting brackets.

It is a perspective view of the brace mounting bracket 1a of the first embodiment. It is a front view of hanger b1. It is a side view of hanger b1. It is a top view of hanger b1. It is explanatory drawing which shows the example of an attachment aspect of the brace attachment metal fitting 1a. It is explanatory drawing which shows the example of an attachment aspect of FIG. It is explanatory drawing which shows another example of a mounting aspect of the brace mounting bracket 1a. It is explanatory drawing which shows the example of an attachment aspect of FIG. It is explanatory drawing which shows another example of a mounting aspect of the brace mounting bracket 1a. It is explanatory drawing which shows another example of a mounting aspect of the brace mounting bracket 1a. It is explanatory drawing which shows another example of a mounting aspect of the brace mounting bracket 1a. It is explanatory drawing which shows another example of a mounting aspect of the brace mounting bracket 1a. It is explanatory drawing which shows another example of a mounting aspect of the brace mounting bracket 1a. It is a perspective view of the brace mounting bracket 1b of a 2nd Example. It is a side view of hanger b2 concerning a 2nd example. It is explanatory drawing which shows the example of an attachment aspect of the brace attachment metal fitting 1b. It is explanatory drawing which shows another example of an attachment aspect of the brace attachment metal fitting 1b. It is a perspective view of brace attachment metal fittings 1c and 1d of a 3rd example. It is explanatory drawing which shows the example of an attachment aspect of brace attachment metal fittings 1c and 1d. It is explanatory drawing which shows another example of an attachment aspect of brace attachment metal fittings 1c and 1d. It is a perspective view of brace mounting brackets 1e and 1f of the fourth embodiment. It is a side view of hanger b3 concerning a 4th example. It is explanatory drawing which shows the example of an attachment aspect of brace attachment metal fittings 1e and 1f. It is explanatory drawing which shows another example of an attachment aspect of brace attachment metal fittings 1e and 1f. It is a perspective view which shows the ceiling board support member f of the conventional structure. It is a perspective view of the conventional brace mounting bracket 1z. It is explanatory drawing which shows the usage example of the conventional brace mounting bracket 1z. It is explanatory drawing which shows another example of use of the conventional brace attachment metal fitting 1z.

  Embodiments of the present invention are described according to the following examples.

<First Example>
The brace mounting bracket 1a according to the present invention is formed by bending or pressing a thin steel plate (metal plate) having a thickness of about 2 mm. As shown in FIG. 1, the outer shape of the brace mounting bracket 1 a is a vertically long rectangular flat plate-shaped mounting plate portion 2 having a width of about 40 mm and a vertical length of about 80 mm, and a fixing extended to the side edge of the mounting plate portion 2. And a piece 3a. Further, the lower edge of the mounting plate portion 2 is bent twice at a substantially right angle to form the engaging portion 4.

  The mounting plate 2 has a flat plate shape with a lateral width of about 40 mm and a longitudinal length of about 80 mm.

  The fixed piece portion 3a is L-shaped in a plan view including an orthogonal portion 5 extending perpendicularly from one side edge of the mounting plate portion 2 and a parallel portion 6a obtained by bending an end portion of the orthogonal portion 5 at 90 °. I am doing. The fixed piece 3 a protrudes upward from the mounting plate 2.

  The configuration of the ceiling system to which the brace mounting bracket 1a is attached will be described. The brace mounting bracket 1a is additionally used in a ceiling system (see FIG. 25) including a ceiling plate p, a ceiling plate support member f, a hanger b, and the like. In such a ceiling system, a plurality of grid-like ceiling plate support members f that support the ceiling plate p are arranged orthogonally between a plurality of main bars g and each main bar g, and both side surfaces of the main bar g are arranged. And a cross bar h fixed to each. The main bar g and the cross bar h have a substantially inverted T-shaped vertical cross section, a vertical side j in the vertical direction, a wide locking ridge i at the upper end of the vertical side j, and a vertical side A locking edge portion k is provided at the lower end of j and projects to both sides. Then, the main bar g and the cross bar h are sequentially assembled to form a lattice-like ceiling plate support member f as a whole. As the main bar g and the cross bar h, those having a conventional configuration can be widely used, and thus detailed description thereof is omitted.

  As shown in FIGS. 2 to 4, the hanger b <b> 1 to which the brace mounting bracket 1 a of this embodiment is attached is a metal piece having a vertically long rectangular shape in front view formed by molding a metal plate. More specifically, the hanger b1 is formed with a hanging bolt connecting protrusion 88 at the upper end of a vertically long rectangular plate-shaped main plate portion 86, and a holding tool 87 for holding the ceiling plate support member f at the lower end of the main plate portion 86. Is provided. The suspension bolt connecting protrusion 88 extends from the upper edge of the main plate portion 86 in the horizontal direction, and a through-hole 91 through which the suspension bolt a is inserted is formed at the center thereof. The clamping tool 87 is for clamping and connecting the locking ridges i of the main bar g or the cross bar h. The holding tool 87 is composed of a pair of hook-shaped holding pieces 89a and 89b that are detachably connected with screws, and the main bar g or crossbar is interposed between the hook-like holding pieces 89a and 89b. It is configured to be in close contact with the locking ridge i by tightening with a screw across the locking ridge i of h. In addition, a well-known technique can be used suitably for this clamping tool 87.

  Moreover, it is the upper part of hanger b1, Comprising: The downward position of the protrusion part 88 for suspension bolt connection comprises the metal fitting fixing | fixed part 90 which fixes the brace attachment metal fitting 1a. The metal fitting fixing portion 90 includes a base portion 92 formed on the upper portion of the main plate portion 86, and extending portions 93, 93 extending in the orthogonal direction from both side edges of the base portion 92. The brace mounting bracket can be screwed onto the outer three surfaces.

  FIG. 5 shows an example of how the brace mounting bracket 1a is mounted in the ceiling system. In this mounting mode, the brace mounting bracket 1a is mounted on one side of the hanger b1 so that the plate surface of the mounting plate portion 2 is parallel to the longitudinal direction of the main bar g, and the brace mounting bracket 1a. The lower end of the engaging portion 4 is engaged with the locking ridge i of the main bar g. And the lower end part of the brace c is fixed to the mounting plate part 2 of the brace mounting bracket 1a. Specifically, the brace mounting bracket 1a, the hanger b1, the main bar g, and the brace c are integrated by being screwed together by technobis d. Here, as shown in FIG. 6, the brace mounting bracket 1a is screwed by technobis d in a state where the parallel portion 6a of the fixing piece portion 3a is attached to the base portion 92 of the bracket fixing portion 90 of the hanger b1. , Integrated with hanger b1.

  FIG. 7 shows another example of attachment of the brace attachment fitting 1a. In this mounting mode, the brace mounting bracket 1a is mounted on one side of the hanger b1 so that the plate surface of the mounting plate portion 2 is parallel to the longitudinal direction of the crossbar h. The lower end of the engaging portion 4 is screwed to the locking ridge i of the cross bar h. Then, the lower end of the brace c is screwed to the mounting plate portion 2 of the brace mounting bracket 1a. FIG. 8 shows a connection mode of the brace mounting bracket 1a and the hanger b1. The brace mounting bracket 1a is screwed by technobis d and integrated with the hanger b1 in a state where the parallel portion 6a of the fixed piece portion 3a is attached to the extension portion 93 of the bracket fixing portion 90 of the hanger b1.

  Thus, if the brace mounting bracket 1a of the present embodiment is attached to one side of the hanger b1, the brace c can be fixed to one side of the hanger b1. The brace mounting bracket 1a has only one mounting plate 2 and is about half the size of the conventional brace mounting bracket 1z (see FIG. 26), so the brace c is attached to one side of the hanger b1. In the case where only the connection is made, waste of material can be reduced by using the brace mounting bracket 1a of the present embodiment.

  9 and 10 show another example of how the brace mounting bracket 1a is attached. In this example of the mounting mode, the brace mounting bracket 1a is mounted on both sides of the hanger b1 by using it in combination with the brace mounting bracket 1a and the brace mounting bracket 1a 'having a symmetrical shape. As described above, the brace mounting bracket 1a of the present embodiment can be mounted on both sides of the hanger b1 by using the brace mounting bracket 1a in combination with the symmetrically shaped brace mounting bracket 1a '.

  FIGS. 11 and 12 show the two brace mounting brackets 1a (1a ′) attached so as to be orthogonal to the hanger b1. Thus, if two brace mounting brackets 1a (1a ') of this embodiment are used in combination, the two braces c can be mounted so as to be orthogonal to each other in plan view.

  Further, FIG. 13 shows three brace mounting brackets 1a and 1a 'mounted in a T shape on the hanger b1. As described above, if the brace mounting brackets 1a and 1a 'according to the present embodiment are used in combination, the brace can be attached to the hanger b1 in a T shape in a plan view.

  As described above, a plurality of brace mounting brackets 1a and 1a 'according to the present embodiment can be connected to the hanger b1 to connect a plurality of braces c in various arrangements.

<Second Example>
The brace mounting bracket 1b of the present embodiment is obtained by partially changing the configuration of the fixed piece from the first embodiment. Specifically, as shown in FIG. 14, the brace mounting bracket 1b of the present embodiment includes a linking portion 10 for linking with another brace mounting bracket 1b. The linking part 10 has a flat plate shape parallel to the parallel part 6b of the fixed piece part 3b, and is connected to the side edge of the parallel part 6b to form a step corresponding to the plate thickness between the parallel part 6b. ing.

  FIG. 15 shows another type of hanger b2 in which the configuration of the metal fitting fixing portion 90a is partially changed from the hanger b1 shown in FIGS. Specifically, the metal fitting fixing portion 90a of the hanger b2 is configured only by the base portion 92 formed on the main plate portion 86. That is, in the hanger b2, the brace mounting bracket can be screwed only on one side surface thereof.

  FIG. 16 shows an example of how the brace mounting bracket 1b of this embodiment is attached in the ceiling system using the hanger b2. In this example, the brace mounting bracket 1b is mounted on one side of the hanger b2 so that the plate surface of the mounting plate portion 2 is parallel to the longitudinal direction of the main bar (not shown), and the brace mounting The engaging part 4 of the metal fitting 1b has its lower end screwed to the main bar, and the fixed piece part 3b is fixed to the hanger b2. Here, the fixing piece portion 3b is screwed in a state where the parallel portion 6b is attached to the metal fitting fixing portion 90a. Thus, the brace mounting bracket 1b of the present embodiment can be fixed so that the mounting plate portion 2 is parallel to the main bar by screwing the parallel portion 6b of the fixing piece portion 3b to the bracket fixing portion 90a. Moreover, in this example of attachment mode, as shown by a two-dot chain line in FIG. 16, the brace attachment 1a 'of the first embodiment can be attached to the opposite side of the hanger b2.

  FIG. 17 is another example of a mounting manner of the brace mounting bracket 1b of the present embodiment in the ceiling system using the hanger b2. In this example, the brace mounting bracket 1b is mounted on one side of the hanger b2 so that the plate surface of the mounting plate portion 2 is perpendicular to the longitudinal direction of the crossbar (not shown). The engaging part 4 of the metal fitting 1b has its lower end screwed to the main bar, and the fixed piece part 3b is fixed to the hanger b2. In this mounting mode, the brace mounting bracket 1b is fixed to the hanger b2 by screwing the orthogonal portion 5 of the fixed piece 3b to the bracket fixing portion 90. Moreover, in such an attachment mode example, as shown by a two-dot chain line in FIG. 17, the brace mounting bracket 1 a ′ of the first embodiment is screwed to the linkage portion 10 of the brace mounting bracket 1 b of the present embodiment, The brace c can be connected to the opposite side of the hanger b2. In addition, if the brace mounting bracket 1a ′ of the first embodiment is fixed to the hanger b1 so as to be orthogonal to the brace mounting bracket 1b of the present embodiment in plan view, the brace c is L-shaped or T-shaped in plan view. It becomes possible to connect to.

<Third embodiment>
The brace mounting brackets 1c and 1d of this embodiment are obtained by partially changing the configuration of the fixed piece 3a according to the first embodiment. The two brace mounting brackets 1c and 1d of this embodiment can be used alone or in combination with each other. Specifically, as shown in FIG. 18, the first brace mounting bracket 1 c is formed by forming a fixed piece portion 3 c having an L shape in plan view on the right edge of the mounting plate portion 2, and its parallel portion. Three protrusions 11 protruding inward are formed on 6c. The second brace mounting bracket 1d is formed with an L-shaped fixed piece 3d in plan view on the left edge of the mounting plate portion 2, and the parallel portion 6d can be fitted with the protrusion 11 above. Three through holes 12 are formed. Here, each protrusion 11 formed on the parallel portion 6c of the first brace mounting bracket 1c protrudes by the thickness of the parallel portion 6d of the second brace mounting bracket 1d, and the two brace mounting brackets 1c, 1d are projected. When the parallel portions 6c and 6d are overlapped and one projection 11 is fitted into the other through-hole 12, the tip of the projection 11 of one parallel portion 6c is the surface of the other parallel portion 6d. Become one.

  FIG. 19 is an example of how the brace mounting brackets 1c and 1d according to the present embodiment are mounted in the ceiling system using the hanger b2. In this example, the two brace mounting brackets 1c and 1d are arranged on both sides of the hanger b2 so that the plate surfaces of the respective mounting plate portions 2 are parallel to the longitudinal direction of the main bar (not shown). It is attached. At this time, the two brace mounting brackets 1c and 1d overlap the parallel portions 6c and 6d of the respective fixing piece portions 3c and 3d, and the parallel portion 6d of the second brace mounting bracket 1d and the bracket fixing portion of the hanger b2. It is screwed to the hanger b2 while being attached to 90. In this state, the first brace mounting bracket 1c is in a state where the tip of the protrusion 11 of the parallel portion 6c is in contact with the bracket fixing portion 90 of the hanger b2. For this reason, even when the second brace mounting bracket 1d is not assembled, the first brace mounting bracket 1c can be screwed into the same position by bringing the protrusion 11 of the parallel portion 6c into contact with the hanger b2. it can.

  FIG. 20 is another example of a mounting manner of the brace mounting bracket 1b of the present embodiment in the ceiling system using the hanger b2. In this example, the two brace mounting brackets 1c and 1d are arranged on both sides of the hanger b2 so that the plate surfaces of the respective mounting plate portions 2 are parallel to the longitudinal direction of the crossbar (not shown). It is attached. At this time, the two brace mounting brackets 1c, 1d are screwed together by screws d, with the parallel portions 6c, 6d of the respective fixed piece portions 3c, 3d overlapped. Then, the two brace mounting brackets 1c and 1d are fixed by screwing the orthogonal portion 5 of the fixing piece 3c of the first brace mounting bracket 1c to the bracket fixing portion 90a of the hanger b2.

<Fourth embodiment>
The brace mounting brackets 1e and 1f of the present embodiment are obtained by partially changing the configuration of the fixed piece portion 3a according to the first embodiment. The two brace mounting brackets 1e and 1f of this embodiment can be used alone or in combination with each other. Specifically, as shown in FIG. 21, the first brace mounting bracket 1 e is formed with an L-shaped fixed piece portion 3 e in a plan view at the right edge of the mounting plate portion 2. On the other hand, the second brace mounting bracket 1f has an L-shaped fixed piece portion 3f in plan view formed on the left edge of the mounting plate portion 2. The parallel portion 6f of the fixed piece portion 3f is formed on the hanger. It is formed at a position where it cannot be screwed and can be screwed to the hanger only through the orthogonal part 5.

  FIG. 22 shows another type of hanger b3 in which the configuration of the metal fitting fixing part is partially changed from the hanger b1 shown in FIGS. Specifically, the metal fitting fixing part 90b of the hanger b2 has a U-shape in plan view, but the extension widths of the extension parts 93b and 93b on both sides are the extension of the hambar b1 in FIGS. It is configured to be shorter than the portion 93.

  FIG. 23 is an example of how the brace mounting brackets 1e and 1f of the present embodiment are mounted in the ceiling system using the hanger b3. In this example, the two brace mounting brackets 1e and 1f are provided on both sides of the hanger b3 so that the plate surfaces of the respective mounting plate portions 2 are parallel to the longitudinal direction of the main bar (not shown). It is attached. At this time, the two brace mounting brackets 1e and 1f are in a state where the orthogonal portions 5 and 5 of the respective fixing piece portions 3e and 3f are attached to the extension portions 93b and 93b of the bracket fixing portion 90b of the hanger b3. Screwed to the hanger b3.

  FIG. 24 is an example of how the brace mounting brackets 1e and 1f of the present embodiment are mounted in the ceiling system using the hanger b3. In this example, the two brace mounting brackets 1e and 1f are provided on both sides of the hanger b3 so that the plate surfaces of the respective mounting plate portions 2 are parallel to the longitudinal direction of the crossbar (not shown). It is attached. At this time, the first brace mounting bracket 1e has its parallel portion 6e screwed to the extending portion 93b of the hanger b3, and the second brace mounting bracket 1f has its orthogonal portion 5 connected to the base portion 92 of the hanger b3. It is fixed by being screwed on. In addition, in such an attachment mode example, as shown by a two-dot chain line in FIG. 24, the second brace attachment is further attached to the extension portion 93b on which the first brace attachment fitting 1e is not attached. The fixing piece 3f of the metal fitting 1f can be screwed, so that the three braces c can be connected in a T shape in plan view.

  As described above, the present invention has been described with reference to a plurality of embodiments. However, the brace mounting bracket of the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the gist of the present invention. Can do. For example, in the above embodiment, the engaging portion of the brace mounting bracket is configured to be screwed directly to the main bar or the crossbar with technobis, but is not limited to such a configuration, and via a holding tool as in the hanger of the embodiment. It may be engaged with the main bar or the cross bar.

DESCRIPTION OF SYMBOLS 1a-1f Brace mounting bracket 2 Mounting plate part 3a-3f Fixed piece part 4 Engagement part 5 Orthogonal part 6a-6f Parallel part 90, 90a, 90b Metal fixing part 92 Base part 93 Extension part a Suspension bolt b, b1 b3 hanger c brace f ceiling plate support member g main bar h cross bar

Claims (1)

A fixed piece for fixing to the hanger connected to the lower end of the suspension bolt, a flat mounting plate for fixing the end of the brace, and a hanger disposed on the lower edge of the mounting plate A brace mounting bracket fixing structure comprising an engaging portion for engaging with a suspended ceiling plate support member,
The brace mounting bracket includes a single mounting plate portion to which one brace is fixed, an orthogonal portion extending perpendicularly to the plate surface from one side edge of the mounting plate portion, and an end portion of the orthogonal portion A fixed piece portion having a parallel portion bent at 90 ° is coupled to the mounting plate portion, and an engaging portion is coupled to the lower edge of the mounting plate portion. One surface is attached to the hanger and is screwed to the hanger.
The hanger connected to the suspension bolt is provided with a metal fitting fixing portion, and a holding tool for holding the ceiling plate support member is arranged at the lower end. Further, the metal fitting fixing portion includes a vertical plate-like base portion, Two extending portions extending in the orthogonal direction from both side edges of the base portion, and the fixing piece portion of the brace mounting bracket on at least one of the base portion and the three outer surfaces of the two extending portions. A structure for fixing a brace mounting bracket, wherein any one of the surfaces can be screwed.

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