JP2012154102A - Hanging metal fitting for system ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hanging metal fitting for a system ceiling, which can be suspended at an intersection of a ceiling grating frame and easily and inexpensively constructed.SOLUTION: At an upper end part of a hanging metal fitting body 12, a top plate 18 where a hole 18a for inserting a hanging bolt B suspended from a ceiling slab is formed is projected to the attaching side of a ceiling bar holder 14. On a lower end part of the hanging metal fitting body 12 and on a lower end part of the hanging metal fitting body 12 holding a vertical piece 102c facing the lower end part, notched grooves 16i and 14e notched so as to be over a vertical piece 104c of a ceiling bar 104 orthogonal to the hanging metal fitting body 12 are provided, respectively. The hole 18a for inserting the hanging bolt is provided such that a vertical line M drawn from the hole 18a for inserting the hanging bolt provided on the top plate 18 toward a ceiling grating frame 100 passes through an intersection part of the ceiling grating frame when the vertical piece 102c of the ceiling bar 102 is held by the hanging metal fitting body 12 and the ceiling bar holder 14.

Description

  The present invention relates to a hanging bracket for a system ceiling that is used to firmly bind a suspension bolt and a ceiling lattice frame that are suspended from a ceiling slab when forming a system ceiling.

  In each room of the office building, equipment such as lighting equipment, air conditioning equipment or fire alarm is installed behind the ceiling. For the purpose of installing these equipment easily and efficiently, so-called system ceilings are provided. The ceiling of the structure called is widely adopted.

  Briefly explaining the structure of the system ceiling, the system ceiling is composed of a ceiling lattice frame formed by combining a vertical bar and a vertical bar on a horizontal piece in a lattice shape. It is formed by suspending with suspended hanging bolts and fitting the ceiling panel into the lattice part of the ceiling lattice frame (more specifically, placing the ceiling panel on the horizontal piece of the ceiling bar) .

  And what is used when suspending a ceiling lattice frame with a suspending bolt is a metal fitting called a hanging metal fitting, The example is disclosed by patent document 1, for example.

  Here, the conventional hanging bracket (Patent Document 1) will be briefly described. The hanging bracket is roughly composed of a hanging bracket main body (hanger main body) and a ceiling bar clip (hook).

  The hanging metal fitting body is a plate-like member made of a rigid material such as metal, and a top plate (horizontal portion) projects from the upper end to the front, and a bolt insertion hole is formed in the top plate. ing. A female screw for screw attachment is formed at the lower end of the hanging metal fitting body.

  The ceiling bar clip is a plate-like member made of a rigid material such as metal, similar to the hanging bracket body, and corresponds to the female thread of the hanging bracket body when the ceiling bar clip is directed to the lower end of the hanging bracket body. Screw insertion holes are respectively formed at the locations to be operated.

  When using a conventional hanging bracket, first, the ceiling bar constituting the ceiling grid frame is sandwiched between the hanger member body and the ceiling bar sandwiching tool, and the screw is inserted into the insertion hole of the ceiling bar sandwiching tool from the surface side. The insertion end is screwed into the female screw of the hanging metal fitting body. As a result, the ceiling bar is sandwiched between the suspension fitting main body and the ceiling bar sandwiching tool, and the ceiling lattice frame and the suspension fitting are integrated.

  Next, the suspension bolts suspended from the ceiling slab are inserted into the bolt insertion holes formed in the top plate of the suspension bracket body, and the top plate is sandwiched with nuts from both the upper and lower sides (the upper nut). Is previously screwed onto the suspension bolt before inserting the top plate of the suspension bracket body). As a result, the ceiling lattice frame and the suspension fitting are connected, and as a result, the ceiling lattice frame and the suspension bolt are firmly connected by the suspension fitting.

  By the way, in recent years, as the earthquake resistance standards of buildings have been raised, it has been required to improve the earthquake resistance of the system ceiling. And as one means for improving the seismic performance of the system ceiling, for example, as disclosed in Patent Document 2, a method of increasing the joint strength between the hanging bracket and the ceiling lattice frame with a reinforcing member has been proposed.

  According to this method, since the reinforcement with respect to the moment in the left-right direction is performed by using the reinforcing member, it is possible to further improve the earthquake resistance of the system ceiling.

JP 2004-197471 A (FIG. 1) JP 2009-35942 A (FIG. 4)

  When suspending the ceiling grid frame with suspension bolts, the cross section of the ceiling grid frame intersects the horizontal ceiling bar and the vertical ceiling bar connected to the horizontal ceiling bar at right angles (intersection points). In order to achieve this, it is necessary to connect the two members with the suspension metal fittings so that the intersections of the ceiling grid frame and the suspension bolts are arranged on substantially the same straight line.

  However, since the conventional hanging metal fittings had to be attached to the straight part between the intersections of the ceiling grid frame, the ceiling grid frame could not be suspended at that intersection, and horizontal shaking was transmitted. If the direction of the swing of the ceiling grid frame intersects the grid of the ceiling grid frame, the ceiling grid frame is distorted, and a horizontal moment is generated in the hanging bracket attached to the straight part. There was a possibility that the balance would be lost and deformed.

  In addition, when a reinforcing member is separately prepared in order to increase the earthquake resistance, the material cost increases and the labor for construction increases, resulting in a significant increase in cost.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a hanging bracket for a system ceiling that can be hung at an intersection of a ceiling lattice frame and can be easily and inexpensively constructed.

The invention described in claim 1 is “an inverted T-shaped ceiling bar 102 composed of horizontal pieces 102b, 104b supporting the ceiling panel 120 and vertical pieces 102c, 104c erected on the horizontal pieces 102b, 104b. , 104 is a system ceiling hanging bracket 10 in which the vertical piece 102c of the ceiling bar 102 is sandwiched and suspended by the suspension bracket main body 12 and the ceiling bar sandwiching tool 14 at the intersection of the ceiling lattice frame 100 assembled in a lattice shape. And
A top plate 18 formed with a hole 18a for inserting a suspension bolt B suspended from the ceiling slab is provided at the upper end of the suspension fitting body 12 so as to project toward the mounting side of the ceiling bar clip 14. And
The vertical piece 104c of the ceiling bar 104 orthogonal to the hanging bracket body 12 is straddled between the lower end portion of the hanging bracket body 12 and the lower end portion of the hanging bracket body 12 that holds the vertical piece 102c facing the lower end portion. Are provided with notched grooves 16i and 14e,
When the vertical piece 102c of the ceiling bar 102 is clamped between the hanging bracket main body 12 and the ceiling bar clamping tool 14, it is pulled toward the ceiling grid frame 100 from the hole 18a for inserting the suspension bolt provided on the top plate 18. The system ceiling suspension bracket 10 is characterized in that a suspension bolt insertion hole 18a is provided so that the perpendicular M passes through the intersection of the ceiling lattice frame 100 ".

  According to the second aspect of the present invention, when the vertical piece 102c of the ceiling bar 102 is clamped by the hanging bracket main body 12 and the ceiling bar clip 14 from both side edges of the ceiling bar clip 14, The reinforcing piece 14b in contact with the reinforcing piece 14b is integrally extended, and the reinforcing piece 14b is provided with a screw hole 14c ".

  According to the third aspect of the present invention, “in at least one of the hanging bracket main body 12 and the ceiling bar clip 14, the reinforcing protrusions 16 j and 14 f are provided on both sides of the notch groove 16 i or 14 e. It is provided along the line "."

  The invention described in claim 4 is described as follows: “The suspension metal fitting body 12 projects forward from the back plate 16 and the upper edge of the back plate 16 and the suspension bolt insertion hole 18a through which the suspension bolt B is inserted. And a reinforcing plate 20 that is bent from both side edges of the back plate 16 toward the top plate and has an upper end connected to the top plate 18.

  The invention described in claim 5 is characterized in that a relief groove 20a for spanner hooking is formed on the upper front side edge of the reinforcing plate 20.

  According to the first aspect of the present invention, the lower end of the hanging bracket body 12 and the lower end portion of the ceiling bar clip 14 are vertically moved so as to straddle the vertical piece 104 c of the ceiling bar 104 orthogonal to the hanging bracket body 12. Since the cutout grooves 16i and 14e extending in the direction are provided, for example, when the horizontal ceiling bar 102 constituting the ceiling lattice frame 100 is clamped between the hanging bracket main body 12 and the ceiling bar clip 14 The vertical piece 104c of the vertical ceiling bar 104 constituting the ceiling lattice frame 100 can be inserted into the cutout grooves 16i and 14e. That is, the hanging bracket 10 can be attached to a location where the horizontal ceiling bar 102 and the vertical ceiling bar 104 intersect (intersection of the ceiling lattice frame 100).

  In addition, when the vertical piece 102c of the ceiling bar 102 is clamped between the hanging bracket main body 12 and the ceiling bar clip 14, the suspension bolt insertion hole 18a provided in the top plate 18 is directed toward the ceiling lattice frame 100. The suspension bolt insertion hole 18a is provided so that the drawn perpendicular line M passes through the intersecting portion of the ceiling lattice frame 100. Therefore, the suspension bolt B suspended from the ceiling slab is connected to the suspension bolt insertion hole 18a. When the ceiling lattice frame 100 is suspended by the suspension bolt B, the suspension bolt B and the intersection of the ceiling lattice frame 100 are aligned on substantially the same straight line.

  That is, according to the present invention, the ceiling grid frame 100 can be suspended at the intersection, so that the hanging bracket 10 swings in the direction of the swing, regardless of which direction the horizontal swing is transmitted from. Alternatively, even if the ceiling lattice frame 100 is distorted, the hanging bracket 10 is not affected by the distortion, and therefore, no force in the twisting direction is applied to the ceiling lattice frame 100, and the load is applied to the horizontal ceiling bar 102 and the vertical ceiling bar. 104 can be dispersed in a balanced manner, and as a result, the ceiling lattice frame 100 can be stably supported.

  “The perpendicular M drawn from the suspension bolt insertion hole 18a toward the ceiling lattice frame 100 passes through the intersection of the ceiling lattice frame 100” means that the perpendicular M passes through the intersection of the ceiling lattice frame 100 “completely. It is not limited to the case of “passing through”, and even if it is not “completely passing”, a deviation that is considered to be “substantially passing” is allowed.

  According to the second aspect of the present invention, the attachment of the hanging bracket 10 to the ceiling lattice frame 100 is performed by the reinforcing piece 14b portion protruding integrally from the side of the ceiling bar sandwiching tool 14, whereby the prior art is achieved. Thus, it is possible to reinforce the moment to the left and right without requiring a separate reinforcing member, and the support strength can be improved easily and inexpensively.

  In addition, since the position to be screwed can be avoided from the intersection of the ceiling grid frame (where the vertical and horizontal ceiling bars 104 and 102 intersect), workability at the time of screwing using an impact driver or the like is greatly improved. It is done.

  According to the invention of claim 3, the base material strength in the vicinity of the notch grooves 16i and 14e can be improved.

  According to the invention of claim 4, the base material strength of the entire hanging bracket body 12 is increased. In addition, if the brace attachment hole 16e is provided in the back plate 16, it becomes possible to attach a brace (brace) through this attachment hole, and hope for the further improvement of seismic strength.

  In addition, when attaching the hanging bracket 10 to the suspension bolt B, the suspension bolt B is inserted into the suspension bolt insertion hole 18a of the top plate 18, and the top plate 18 is clamped by the pair of upper and lower nuts 110a, 110b. When the lower nut 110b is tightened, the reinforcing plate 20 bent from both side edges of the back plate 16 toward the top plate obstructs the spanner hanging operation. In such a case, if a relief groove 20a for spanner hooking is formed on the upper front edge of the reinforcing plate 20 as in the invention of claim 5, the spanner of the spanner can be hooked when the lower nut 110b is hooked. A movable range can be enlarged and the work efficiency of spanner hanging can be improved.

It is a disassembled perspective view of the hanging metal fitting which concerns on this invention. It is a figure from the front diagonal upper direction which shows the use condition of the hanging metal fitting which concerns on this invention. It is a figure from the back diagonally upward direction which shows the use condition of the hanging metal fitting which concerns on this invention.

  The present invention will be described below with reference to FIGS. As shown in FIGS. 2 to 3, the hanging metal fitting 10 of the present invention connects a suspension bolt B suspended from a ceiling slab (not shown) and a ceiling lattice frame 100 for supporting the ceiling panel. As shown in FIG. 1, the suspension bracket main body 12 and the ceiling bar clip 14 are roughly configured.

  The structure of the ceiling lattice frame 100 will be briefly described. The ceiling lattice frame 100 includes horizontal pieces 102b and 104b that support the ceiling panel 120 and vertical pieces 102c that are erected on the horizontal pieces 102b and 104b. 104c and inverted T-shaped ceiling bars 102 and 104 are assembled in a grid pattern. The heads 102a and 104b of each vertical piece 102c are formed to be slightly thick.

  The hanging bracket main body 12 includes a back plate 16, a top plate 18, and a pair of left and right reinforcing plates 20. The back plate 16 includes a brace attaching portion 16a, a connecting portion 16b, a ceiling bar sandwiching tool attaching portion 16c, and a ceiling bar sandwiching portion 16d, which are integrally formed as one member.

  The brace attachment portion 16a is a substantially rectangular portion, and is provided with brace attachment holes 16e at the four corners. The lower end portion of the brace attaching portion 16a is continuously provided with a connecting portion 16b that inclines toward the front side (the side on which the ceiling bar clip 14 is attached) as it goes downward, and extends from the lower end edge of the connecting portion 16b to the ceiling. A bar clip attachment portion 16c is vertically provided. The ceiling bar clip attaching portion 16c is a rectangular portion for fixing the ceiling bar clip 14 and a pair of left and right ceiling bar clip fixing screw holes 16f are screwed to the lower end portion thereof at a predetermined interval. ing.

  A pair of left and right ceiling bar clamping portions 16d are extended from the lower end edge of the ceiling bar clamping tool mounting portion 16c. Each ceiling bar clamping part 16d is a part which cooperates with the ceiling bar clamping tool 14 mentioned later, and clamps the ceiling lattice frame 100, The cross-section substantially U-shaped fitting groove extended in the left-right direction in the middle step part. 16g is bent according to the shape of the heads of the vertical pieces 104c and 102c of the vertical and horizontal ceiling bars 104 and 102 constituting the ceiling lattice frame 100, and screw insertion holes 16h are formed in the fitting grooves 16g. Has been.

  A notch groove 16i extending upward from the lower end edge is formed between the pair of left and right ceiling bar sandwiching portions 16d. The width of the cutout groove 16i is such that the heads 102a, 104a of the vertical pieces 102c, 104c of the ceiling bars 102, 104 constituting the ceiling grid frame 100 can be fitted. It is set slightly wider than the thickness. In addition, reinforcing protrusions 16j (see FIG. 3) are formed on both sides of the notch groove 16i along the notch groove 16i.

  In addition, the back plate 16 has such a bent structure (that is, the brace mounting portion 16a on the side to which the top plate 18 to be described later is mounted is on the rear side of the ceiling bar sandwiching portion 16d that is the mounting portion to the ceiling lattice frame 100. Is a hole 18a for inserting a suspension bolt of a top plate 18 to be described later when the vertical piece 102c of the ceiling bar 102 is sandwiched between the suspension bracket main body 12 and the ceiling bar clip 14. This is because the perpendicular M (see FIG. 2) drawn from the ceiling lattice frame 100 toward the ceiling lattice frame 100 passes through the intersection of the ceiling lattice frame 100.

  A top plate 18 protrudes from the upper edge of the back plate 16 by bending forward. Of course, the top plate 18 may be welded to the upper edge of the back plate 16 by welding. A hole 18 a for inserting a suspension bolt is formed in the central portion of the top plate 18. The suspension bolt insertion hole 18a is directed from the suspension bolt insertion hole 18a to the ceiling lattice frame 100 when the vertical piece 102c of the ceiling bar 102 is sandwiched between the suspension fitting main body 12 and the ceiling bar clip 14. The vertical line M drawn in this way is set so as to pass through the intersecting portion of the ceiling lattice frame 100 (in a case of passing completely, a deviation of a range considered to pass substantially is allowed).

  On both the left and right sides of the back plate 16, reinforcing plates 20 are projected by bending toward the front. In this embodiment, the reinforcing plate 20 is provided integrally with the brace attaching portion 16a, the connecting portion 16b and the ceiling bar clip attaching portion 16c of the back plate 16 and the top plate 18 by press molding. Of course, the reinforcing plate 20 may be formed by welding so as to be in contact therewith.

  Each reinforcing plate 20 has an end edge on the back side (side in contact with the back plate 16) formed in a step shape so as to follow the shape of the back plate 16. Further, a relief groove 20a for spanner hooking is formed at the edge of the upper end of the front side of each reinforcing plate 20.

  In this embodiment, the hanging bracket body 12 is formed by bending a single metal plate cut into a predetermined shape, but the back plate 16, the reinforcing plate 20 and the top plate 18 are separately provided. It may be prepared and each member may be connected by fixing means such as welding.

  The ceiling bar sandwiching tool 14 is made of a metal rigid material, and is formed by bending a plate-like member punched into a predetermined shape (or simultaneously with the punching). A fitting groove 14a having a substantially inverted U-shaped cross section extending in the direction of the head is bent in accordance with the head shape of the vertical pieces 102c and 104c of the ceiling bars 102 and 104 constituting the ceiling lattice frame 100.

  Both ends of the groove bottom of the fitting groove 14a protrude on both the left and right sides, and screw holes 14c are respectively formed in the reinforcing pieces 14b that are the protruding portions (in this embodiment, the fitting groove 14a is formed in the portion of the fitting groove 14a). Screw hole 14c is also formed). Of course, the reinforcing piece 14b may be provided in an inverted U shape from both ends of the entire fitting groove 14a in order to improve the strength. Above the fitting groove 14a, a pair of left and right screw holes 14d are formed at positions corresponding to the ceiling bar clip fixing screw holes 16f.

  A notch groove 14e extending upward from the lower end edge of the ceiling bar sandwiching tool 14 is formed so as to divide the fitting groove 14a described above. The width of the cutout groove 14e is set to be slightly wider than the thickness of the heads 102a and 104a so that the heads 102a and 104a of the ceiling bars 102 and 104 constituting the ceiling grid frame 100 are fitted. ing. Further, reinforcing protrusions 14f are formed on both sides of the notch groove 14e along the notch groove 14e.

  When using the hanging bracket 10 configured as described above, first, the hanging bracket body 12 and the ceiling bar clip 14 are respectively addressed to the front and rear surfaces of the horizontal ceiling bar 102 constituting the ceiling lattice frame 100. Go. At this time, the hanging bracket body 12 and the ceiling bar sandwiching tool 14 are connected to the ceiling bar so that the fitting groove 16g of the hanging bracket body 12 and the fitting groove 14a of the ceiling bar sandwiching tool 14 are along the head portion 102a of the ceiling bar 102. 102 is addressed.

  The important point here is that in the hanging bracket 10 of the present embodiment, a notch groove 16i extending in the vertical direction is formed at the lower end portion of the hanging bracket main body 12, and the lower end portion of the ceiling bar sandwiching portion 14 is formed. Also, a notch groove 14e extending in the vertical direction is formed. By forming the cutout grooves 16i and 14e, the head 104a of the vertical ceiling bar 104 intersecting the horizontal ceiling bar 102 can be inserted into the cutout grooves 16i and 14e. As a result, the hanging bracket 10 can be attached to the intersection of the ceiling lattice frame 100 (where the horizontal ceiling bar 102 and the vertical ceiling bar 104 intersect each other).

  Next, the tip of the coupling screw 30 prepared separately is inserted from the surface side into a pair of left and right screw holes 14d provided in the ceiling bar sandwiching tool 14, and the insertion end of each coupling screw 30 is connected to the hanging bracket body. Twelve corresponding ceiling bar clip fastener fixing screw holes 16f are respectively screwed. As a result, the horizontal ceiling bar 102 is firmly held between the hanging bracket body 12 and the ceiling bar clip 14.

  Further, the tip of the coupling screw 32 prepared separately is inserted into the screw hole 14c (here, the screw hole 14c on the side provided in the reinforcing piece 14b), and the insertion end thereof is a screw hole (provided in the ceiling bar 102). (Not shown). Thereby, since the reinforcement with respect to the moment to the left and right is carried out, support strength is raised more. If the coupling screw 32 is attached to the screw hole 14c on the reinforcing piece 14b side as in this embodiment, the coupling screw 32 can be attached at a location sufficiently away from the vertical ceiling bar 104. Therefore, workability at the time of screwing using an impact driver or the like can be greatly improved.

  Next, the suspension bolt B suspended from the ceiling slab (not shown) is inserted into the suspension bolt insertion hole 18a formed in the top plate 18 of the suspension bracket body 12, and the top plate 18 is moved up and down. The nuts 110a and 110b are sandwiched from both sides (the upper nut 110a is screwed to the suspension bolt B in advance, and the suspension bolt B is inserted into the suspension bolt insertion hole 18a of the top plate 18 of the suspension bracket body 12 The lower nut 110b is screwed onto the suspension bolt B from the lower side). As a result, the ceiling grid frame and the suspension bolt are tightly bound by the suspension fitting.

  The important point here is that the vertical line 102c of the ceiling bar 102 is perpendicularly drawn from the hole 18a for inserting the suspension bolt toward the ceiling lattice frame 100 when the vertical piece 102c of the ceiling bar 102 is sandwiched between the suspension bracket main body 12 and the ceiling bar clip 14. This is the point that the suspension bolt insertion hole 18 a is set so that M passes through the intersection of the ceiling lattice frame 100.

  By adopting such a configuration, when the suspension bolt B suspended from the ceiling slab is inserted into the suspension bolt insertion hole 18a and bolted, and the ceiling lattice frame 100 is suspended by the suspension bolt B. In addition, the suspension bolt B and the intersecting portion of the ceiling lattice frame 100 are arranged in substantially the same straight line. That is, since the ceiling grid frame 100 can be suspended at the intersection, the hanging bracket 10 swings in the direction of the swing or the ceiling grid frame 100 Even if it is distorted, the hanging bracket 10 is not affected by the distortion, so that no force in the twisting direction is applied to the ceiling lattice frame 100, and the load is balanced between the horizontal ceiling bar 102 and the vertical ceiling bar 104, respectively. As a result, the ceiling lattice frame 100 can be stably supported.

  In this embodiment, the escape groove 20a for hanging the wrench is formed on the edge of the upper end of the front side of the reinforcing plate 20, so that the workability when the lower nut 110b is wrung is greatly improved.

  Further, the height of the ceiling lattice frame 100 can be arbitrarily adjusted by adjusting the tightening positions of the upper nut 110a and the lower nut 110b. Further, if a brace is attached via a brace attaching hole 16e provided in the back plate 16, further improvement in seismic strength can be desired.

DESCRIPTION OF SYMBOLS 10 ... Suspension bracket 12 ... Suspension bracket main body 14 ... Ceiling bar clamping tool 14e ... Notch groove 16 ... Back plate 16i ... Notch groove 18 ... Top plate 18a ... Bolt insertion hole 20 ... Reinforcement plate 100 ... Ceiling lattice frame 102 ... (horizontal) ceiling bar 104 ... (vertical) ceiling bar 120 ... ceiling panel B ... suspension bolt M ... perpendicular

Claims (5)

The vertical piece of the ceiling bar is hung at the intersection of the ceiling lattice frame in which inverted T-shaped ceiling bars composed of a horizontal piece supporting the ceiling panel and a vertical piece standing on the horizontal piece are assembled in a lattice shape. A system ceiling bracket that is sandwiched and suspended between a bracket body and a ceiling bar clip tool,
The top plate formed with a hole for inserting a suspension bolt suspended from a ceiling slab protrudes toward the attachment side of the ceiling bar clip at the upper end of the suspension fitting main body. ,
The lower end of the hanging bracket body and the lower end of the hanging bracket main body sandwiching the vertical piece facing the lower end are cut so as to straddle the vertical piece of the ceiling bar perpendicular to the hanging bracket body. Each notched groove is provided,
When the vertical piece of the ceiling bar is sandwiched between the suspension fitting main body and the ceiling bar sandwiching tool, a vertical line drawn toward the ceiling lattice frame from the suspension bolt insertion hole provided in the top plate The system ceiling suspension bracket, wherein the suspension bolt insertion hole is provided so as to pass through an intersection of the ceiling lattice frame. Reinforcing pieces that come into contact with the vertical piece when the vertical piece of the ceiling bar is clamped by the suspension metal fitting body and the ceiling bar clip tool are integrally extended from both side edges of the ceiling bar clip tool. ,
The system mounting bracket according to claim 1, wherein a screw hole is provided in the reinforcing piece.   The reinforcing protrusion is provided along the notch groove on both sides of the notch groove in at least one of the hanging bracket main body and the ceiling bar clip tool. Suspension bracket for system ceiling described in 1.   The suspension metal fitting body includes a back plate, a top plate that protrudes forward from an upper edge of the back plate, the suspension plate through which the suspension bolt is inserted, and the back plate. The system ceiling according to any one of claims 1 to 3, wherein the upper end of the system is composed of a reinforcing plate that is bent from both side edges to the top plate side and has an upper end connected to the top plate. Hanging bracket.   5. The system ceiling suspension bracket according to claim 4, wherein a relief groove for spanner is formed at an upper front side edge of the reinforcing plate.

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