Suspended ceiling structure

Abstract

To provide a reinforcing metal fitting that can reinforce an intersection portion between a field edge receiving portion and a field edge portion and can easily attach various members.SOLUTION: There is provided a reinforcing metal fitting 3 attached to an intersection 17A between a field edge receiving portion 14 and a field edge portion 15 having a lip portion 151 in a suspended ceiling structure having the field edge receiving portion and the field edge portion suspended from a structure. Further, the reinforcing metal fitting is provided with a first metal fitting 4 fixed to the field edge receiving portion and a second metal fitting 5 straddling the first metal fitting and fixed to the field edge portion. Further, the second metal fitting has plate portions (51, 52) facing each other across the lip portion of the field edge portion, and stage portions 53A and 53B extending from the upper edges of the respective plate portions in the opposite direction while contacting the upper end surface of the field edge receiving portion to form a flat surface.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a reinforcing bracket that is attached to the intersection between a soffit support portion and a soffit of a suspended ceiling structure having a soffit support portion and a soffit suspended from a structural member such as a building, and to a suspended ceiling structure to which the reinforcing bracket is attached. [Background technology]

[0002] As disclosed in Patent Documents 1-3, earthquake-resistant reinforcement fittings are known that reinforce a suspended ceiling structure having a rafter support portion and a rafter portion suspended from a building structural member such as a floor slab or beam at the intersection between the rafter support portion and the rafter portion.

[0003] In the suspended ceiling structures disclosed in these documents, earthquake-resistant braces are placed inside the ceiling. In detail, the bottom ends of four diagonally placed braces are connected to a single earthquake-resistant reinforcement bracket attached to the intersection of the rafters and the rafters.

[0004] By using such earthquake-resistant reinforcement fittings, the load of the brace is transmitted directly to the ceiling joist directly below, making it possible to efficiently distribute the force to the ceiling panel via the joist. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4963484 [Patent Document 2] Patent No. 4845212 [Patent Document 3] Patent No. 6290167 [Patent Document 4] JP 2009-2435 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in some cases, braces cannot be placed inside a suspended ceiling due to space restrictions, and other forms of reinforcement are installed instead. Also, as disclosed in Patent Document 4, vibration-proofing materials are sometimes installed to prevent vibrations caused by vehicle traffic or walking on the structure supporting the suspended ceiling from being transmitted to the ceiling panels via the braces and generating noise.

[0007] Therefore, the present invention aims to provide a reinforcing bracket that can reinforce the intersection between the furring strip support portion and the furring strip portion, and also allows for easy attachment of various components, as well as a suspended ceiling structure to which the reinforcing bracket is attached. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the reinforcing metal fitting of the present invention is a reinforcing metal fitting that is attached to the intersection of the soffit receiving portion and the soffit having a lip portion in a suspended ceiling structure having a soffit receiving portion and a soffit portion suspended from a structural member, and comprises a first fitting fixed to the soffit receiving portion located above, and a second fitting straddling the first fitting and fixed to the soffit portion, the first fitting having a bent portion straddling the soffit receiving portion, a notch portion formed in the lower portion so that the soffit can be fitted, and a joining means for fixing to the soffit receiving portion, and the second fitting having a plate portion that faces the lip portion of the soffit portion, a stage portion that extends from the upper edges of each of the plate portions in opposite directions while contacting the upper end surface of the soffit receiving portion to form a plane, a hook portion provided on the lower portion of the plate portion on the lip portion side, and a bolt portion that is arranged on both sides of the soffit receiving portion to introduce a fastening force between the plate portions when the hook portion is hooked to the lip portion. Here, it is preferable that a mounting hole is drilled through the stage portion in the vertical direction.

[0009] The invention of the suspended ceiling structure is characterized in that it is a suspended ceiling structure having a soffit receiving portion and a soffit suspended from a structure, the structure includes the above-mentioned reinforcing metal fitting attached to the intersection of the soffit receiving portion and the soffit having a lip portion, and a vertical member whose upper portion is fixed to the structure, and whose lower portion is connected to the stage portion of the reinforcing metal fitting. Here, a sound insulating portion can be provided on the lower end surface of the vertical member.

[0010] Furthermore, another suspended ceiling structure invention is a suspended ceiling structure having a soffit support portion and a soffit portion suspended from a structural body, and is characterized in that it comprises the above-mentioned reinforcing bracket attached to the intersection of the soffit support portion and the soffit portion having a lip portion, and a diagonal member arranged in an approximately V-shape when viewed from the side along the axial direction of at least one of the soffit support portion and the soffit portion, and the lower part of the diagonal member is connected to the stage portion of the reinforcing bracket via a sound-proofing portion. Effect of the Invention

[0011] The reinforcing metal fitting of the present invention configured in this way reinforces the suspended ceiling structure at the intersection between the soffit receiving part and the soffit. In this reinforcing metal fitting, the first metal fitting fixed to the soffit receiving part is straddled by the second metal fitting fixed to the soffit. The second metal fitting has a stage part that extends while contacting the upper end surface of the soffit receiving part to form a flat surface.

[0012] This not only reinforces the intersection between the siding and the siding, but also makes it easy to attach various components to the flat stage. Since the stage is in contact with the upper end surface of the siding, even if a load is applied from above, it can be supported by the reaction force of the siding.

[0013] In addition, the stage section, which extends in a flat plane, is provided with mounting holes that penetrate in the vertical direction, so that various attachments can be easily attached using connecting means such as bolts or screws.

[0014] If the lower part of the vertical member, whose upper part is fixed to a structural member such as a beam, is attached to the reinforcing metal fittings, the force transmitted from the structural member through the vertical member can be transmitted straight to the edging and ceiling board without bending the transmission path. Furthermore, by providing a soundproofing part such as anti-vibration rubber on the lower end surface of the vertical member, a soundproofing part is interposed between the stage part and the vertical member, which provides a connection with soundproofing function.

[0015] Furthermore, if a suspended ceiling structure is used in which the lower parts of the diagonal members, which are arranged in an approximately V-shape when viewed from the side, are connected to the stage section via a sound-proofing section, the sound-proofing section can be placed where the lower parts of the diagonal members are concentrated, so the sound-proofing function can be ensured even if the number of parts is reduced. [Brief description of the drawings]

[0016] [Figure 1] 1 is a perspective view for explaining the configuration of a suspended ceiling structure of the present embodiment. FIG. [Diagram 2] FIG. 2 is an exploded perspective view for explaining the configuration of the reinforcing metal fitting according to the present embodiment. [Diagram 3] FIG. 2 is a perspective view for explaining the configuration of a reinforcing metal fitting according to the present embodiment. [Figure 4] FIG. 13 is a perspective view illustrating a state in which a reinforcing metal fitting is attached to an intersection portion. [Diagram 5] 11 is an explanatory diagram showing the configuration of an attachment to be attached to a reinforcing metal fitting. FIG. [Figure 6] FIG. 2 is a perspective view for explaining a state in which an angle iron is attached to the reinforcing metal fitting of the first embodiment. [Figure 7] 13 is a perspective view showing the angle iron attached to the reinforcing metal fitting from a different angle. FIG. [Figure 8] FIG. 11 is a perspective view for explaining the state in which a square pipe material is attached to the reinforcing metal fitting of the second embodiment. [Figure 9] FIG. 11 is a perspective view for explaining the configuration of the suspended ceiling structure of the third embodiment. [Figure 10] FIG. 11 is a plan view for explaining a state in which a sound-proofing part is attached to a reinforcing metal fitting according to a third embodiment. [Figure 11] 11 is a cross-sectional view taken along the direction of the arrow AA in FIG. 10. [Figure 12] 11 is a cross-sectional view taken along the line BB in FIG. 10. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a diagram for explaining the configuration of a suspended ceiling structure 1 of this embodiment. Figs. 2 to 4 are diagrams for explaining the configuration of a reinforcing bracket 3 of this embodiment.

[0018] The suspended ceiling structure 1 is installed in various buildings, such as gymnasiums, assembly halls, public facilities that serve as bases for disaster emergency measures, buildings, etc. The suspended ceiling structure 1 of this embodiment can be applied to existing suspended ceilings as well as newly constructed suspended ceilings.

[0019] As shown in Figure 1, a plurality of suspension bolts 13 are suspended at intervals from the underside of a floor slab 11 and beams 12 which form the structural body of a building, and a siding support portion 14 is suspended from a hanger 131 at the lower end of the suspension bolt 13.

[0020] In addition, the sill portion 15 is attached in a direction substantially perpendicular to the axial direction of the sill receiving portion 14 at intervals. Furthermore, a ceiling board 16 such as a gypsum board is attached to the lower surface of the sill portion 15.

[0021] In the suspended ceiling structure 1 of this embodiment, at the intersections 17A, 17B between the siding receiving portion 14 and the siding portion 15, near the beam 12, a vertical member, a beam 2, is attached via a reinforcing metal fitting 3, which will be described later. This beam 2 is a reinforcing material whose upper portion is fixed to the side of the beam 12 and whose lower portion is connected to the reinforcing metal fitting 3. For example, when it is not possible to place a brace inside the suspended ceiling due to space restrictions, the beam 2, which serves as a reinforcing material, is placed.

[0022] As shown in Figures 2-4, the reinforcing metal fitting 3 is attached to the intersection 17A between the sill receiving portion 14 and the sill portion 15. The lower portion of the bundle 2 is attached to the reinforcing metal fitting 3 in a form as exemplified in the examples described later.

[0023] The sill support portion 14 onto which the hanger 131 of the hanging bolt 13 is hooked is formed in an approximately U-shape in cross section, as shown in Figure 2, by an upper flange 141 forming an upper end surface of an approximately horizontal plane, a lower flange 142 that is approximately parallel to the upper flange 141, and a web 143 of an approximately vertical plane that connects the side edges of the upper flange 141 and the lower flange 142.

[0024] On the other hand, the furring strip 15 fixed to the furring strip receiving portion 14 is formed by a bottom 153, side walls 152, 152 rising from both sides of the bottom 153, and lip portions 151, 151 bent twice inward from the upper edges of the side walls 152, 152. That is, a steel material having a generally U-shaped cross section and lip portions 151, 151 can be used for the furring strip 15. The lip portion 151 is formed by the upper surface and the hanging surface into a generally L-shaped cross section.

[0025] As shown in Figures 2-4, the reinforcing bracket 3 is mainly composed of a first bracket 4 which is fixed to the sill support portion 14 located above, and a second bracket 5 which is placed across the first bracket 4 and fixed to the sill portion 15.

[0026] The first metal fitting 4 is mainly composed of a bent portion 41 located in the center and spanning the sill receiving portion 14, a notched portion 42 formed in the lower portion so that the sill portion 15 can fit into it, and a screw material 43 as a joining means for fixing the first metal fitting 4 to the sill receiving portion 14.

[0027] 2, the bent portion 41 is formed in a generally gate-shaped cross section so as to cover the siding receiving portion 14 from above. In other words, the bent portion 41 is formed in a shape that covers both sides of the upper flange 141 and the web 143 of the siding receiving portion 14.

[0028] A cutout portion 42 is provided at the lower portion of the bent portion 41 so that the upper portion of the edge portion 15 can be fitted therein. In other words, the cutout portion 42 surrounds the upper and both sides of the edge portion 15.

[0029] The bent portion 41 formed in this manner is placed on the upper flange 141 of the sill receiving portion 14 and the cutout portion 42 is fitted into the sill portion 15 below it, thereby placing the first fitting 4 on the upper ends of the side wall portions 152, 152.

[0030] Furthermore, on both sides of the bent portion 41, screws 43, 43 are continuously inserted through the web 143 of the soffit receiving portion 14 and the first metal fitting 4 to join them together. As a result, the first metal fitting 4 is fixed to the soffit receiving portion 14.

[0031] In this way, by using the screw material 43 that penetrates both of the first metal fitting 4 to fix the furring strip receiving portion 14 as the joining means, a strong joining can be achieved by the shear resistance of the screw material 43. In other words, if the screw material 43 that penetrates the first metal fitting 4 is directly screwed into the web 143 of the furring strip receiving portion 14, a strong joining can be achieved without any slippage between the furring strip receiving portion 14 and the first metal fitting 4. In this state, even if the furring strip receiving portion 14 and the furring strip portion 15 are not joined, the movement of the first metal fitting 4 in a direction other than the axial direction of the furring strip portion 15 is restricted.

[0032] Furthermore, ribs 44, 44 protrude from both axial side edges of the sill receiving portion 14 of the first fitting 4 in a direction substantially parallel to the axial direction of the sill portion 15. These ribs 44, 44 can increase the rigidity of the first fitting 4, which is manufactured by bending a plate material such as a steel plate.

[0033] The second metal fitting 5 is placed over the first metal fitting 4 attached to the siding support portion 14 in this manner. The second metal fitting 5 has a pair of plate portions (51, 52) that face each other and sandwich one lip portion 151 of the siding portion 15 therebetween.

[0034] The pair of plate portions (51, 52) are formed of steel plates or the like with central grooves 511, 521 provided so that they can straddle the soffit receiving portion 14. Here, the plate portion arranged on the lip portion 151 side (inside the soffit portion 15) is referred to as the lip portion side plate portion 51, and the plate portion arranged on the outside of the soffit portion 15 is referred to as the stop plate portion 52.

[0035] Stage portions 53A and 53B are provided on the pair of plate portions (51, 52) in opposite directions from the upper edges of the respective plates, and extend to form a flat surface while contacting the upper flange 141 that becomes the upper end surface of the sill receiving portion 14. Here, the flat surface provided on the lip portion side plate portion 51 is referred to as stage portion 53A, and the flat surface provided on the stop plate portion 52 is referred to as stage portion 53B.

[0036] The stage portion 53A is formed with a recess 532A continuing to the groove portion 511 provided in the center of the lip side plate portion 51 to allow the sill receiving portion 14 to straddle it. On the other hand, the stage portion 53B is formed with a recess 532B continuing to the groove portion 521 provided in the center of the stop plate portion 52 to allow the sill receiving portion 14 to straddle it.

[0037] The recesses 532A, 532B provided in each of the pair of stage portions 53A, 53B form a continuous rectangular space as shown in Fig. 3. The upper surface of the bent portion 41 of the first fitting 4 is accommodated in the space formed by the recesses 532A, 532B. In short, a wide, substantially flush rectangular plane is formed on the sill support portion 14 by the stage portions 53A, 53B and the upper surface of the bent portion 41.

[0038] Mounting holes 531 are drilled in the vicinity of the corners of the wide rectangular plane formed by the pair of stage portions 53A, 53B so as to extend from upper flange 141 in the vertical direction. In this embodiment, an example in which four mounting holes 531 are provided at each corner will be described.

[0039] 2 and 3, a hook portion 512 having a generally L-shape when viewed from the side is provided on the lower portion of the lip portion side plate portion 51. The hook portion 512 is provided at a position where it can be hooked onto the lip portion 151 from below.

[0040] The hook portion 512 is formed by cutting a portion of the lower portion of the lip side plate portion 51 into the upper side and both sides of a rectangle and tilting it down toward the lip portion 151 (see FIG. 11).

[0041] 2 to 4, an insertion hole 513 is drilled above the hook portion 512, and a bolt portion 54 passes through the insertion hole 513 across the lip portion 151. The bolt portion 54 passes through from the lip portion side plate portion 51 toward the insertion hole 523 of the retaining plate portion 52, and a nut 541 is attached to the tip that protrudes toward the retaining plate portion 52 (see FIG. 6).

[0042] 4, a washer portion 55 formed of a rectangular (approximately square) steel plate or the like is disposed on the head side of the bolt portion 54. That is, the fastening force introduced between the lip side plate portion 51 and the retaining plate portion 52 by fastening the bolt portion 54 is transmitted through the contact surface between the washer portion 55 and the lip side plate portion 51.

[0043] Here, in order to restrict the rotation of the washer portion 55, the rib portion 514 is protruded from the side edge of the lip side plate portion 51. In detail, the rib portions 514, 514 protrude in a direction substantially parallel to the axial direction of the sill receiving portion 14 from both axial edges of the sill portion 15 of the lip side plate portion 51. The rib portions 514, 514 can increase the rigidity of the lip side plate portion 51, which is manufactured by bending a plate material such as a steel plate.

[0044] Furthermore, as shown in Figure 4, rib portions 522, 522 can be extended in a direction approximately parallel to the axial direction of the sill support portion 14 on both axial side edges of the sill portion 15 of the retaining plate portion 52 to increase rigidity.

[0045] When a fastening force is introduced between the plate portions (51, 52) by the bolt portion 54, the lip portion 151 is crushed and the second fitting 5 is fixed to the edge portion 15. That is, when the fastening force of the bolt portion 54 is transmitted to the lip portion side plate portion 51 via the washer portion 55, the lip portion 151 in contact therewith is deformed and crushed.

[0046] The second fitting 5, which is crimped by the introduced fastening force and the deformed lip portion 151, has its axial movement of the furring edge portion 15 restricted. In addition, the lip portion side plate portion 51 and the stop plate portion 52, which are formed in a gate shape and straddle the first fitting 4 and the furring edge receiving portion 14, also restrict the axial movement of the furring edge portion 15 of the second fitting 5.

[0047] Furthermore, although not shown, it is preferable that the first metal fitting 4 fixed to the furring strip receiving portion 14 and the second metal fitting 5 straddling the first metal fitting 4 and fixed to the furring strip portion 15 are joined by an integration means.

[0048] For example, a joining piece is protruded from the lip side plate portion 51 so as to be approximately perpendicular, and is arranged along the outer surface of the bent portion 41 of the first fitting 4, and screws are screwed in as an integration means for joining the first fitting 4 and the second fitting 5. In particular, by using multiple screws as the integration means for the first fitting 4 and the second fitting 5, the joint strength is increased compared to when they are integrated with a single screw, and the integration of the two can be further improved.

[0049] In this way, the intersection 17A between the sill receiving portion 14 and the sill portion 15 can be fixed by the highly rigid reinforcing metal fitting 3. Simply by attaching this reinforcing metal fitting 3, the joint strength of the intersection 17A is increased and reinforced.

[0050] On the other hand, as shown in Fig. 1, the reinforcing clip 6 and the clip 61 are attached to the intersection 17B other than the intersection 17A where the reinforcing metal fitting 3 is attached. The reinforcing clip 6 can connect the siding support part 14 and the siding part 15 more firmly than the normal clip 61 attached to the intersection 17B between the siding support part 14 and the siding part 15 where the reinforcing metal fitting 3 is not attached.

[0051] An attachment 7 for fixing the lower end of the bundle 2 and the like is attached to the stage portions 53A, 53B of the reinforcing metal fitting 3 attached to the intersection portion 17A. An example of the attachment 7 mounted on the reinforcing metal fitting 3 is shown in FIG.

[0052] 5 shows a plan view and two side views of the attachment 7. The attachment 7 has a flat plate portion 71 that is rectangular in plan view, such as a square, and a central protrusion 72 that protrudes upward from the center of the flat plate portion 71.

[0053] Bolt holes 711 are drilled in the corners of the flat plate portion 71 at positions that overlap with the mounting holes 531 of the stage portions 53A and 53B. The attachment 7 can be fixed to the reinforcing bracket 3 by passing a bolt 73 through the bolt hole 711 and the mounting hole 531 and fastening it with a nut 731 (see FIG. 6, etc.). If the mounting holes 531 of the stage portions 53A and 53B are engraved with female threads, the attachment 7 can be fixed by the bolt 73 screwed in from above without using a nut.

[0054] The central protrusion 72 of the attachment 7 can be formed, for example, by a rectangular steel pipe. In addition, by closing the upper end opening of the square steel pipe with the upper cover portion 722, the rigidity of the central protrusion 72 can be increased.

[0055] As shown in Fig. 5, holes 721 can be drilled in the side surface of the central protrusion 72 as necessary. By using these holes 721, the lower part of the bundle 2 can be easily fixed with bolts or screws. Details will be described later in Example 1.

[0056] Next, the operation of the reinforcing metal fitting 3 and the suspended ceiling structure 1 of this embodiment will be described. The reinforcing metal fitting 3 of the present embodiment configured as described above reinforces the suspended ceiling structure 1 at the intersection 17A between the soffit receiving portion 14 and the soffit portion 15 having the lip portion 151.

[0057] In this reinforcing metal fitting 3, the second metal fitting 5 fixed to the furring strip 15 is placed across the first metal fitting 4 fixed to the furring strip receiving portion 14. At this time, if the washer portion 55 is positioned in the correct direction and the entire surface of the washer portion 55 is in contact with the lip portion side plate portion 51, the fastening force of the bolt portion 54 is introduced at the desired magnitude as designed, and the lip portion 151 can be crushed within the designed range.

[0058] By attaching the attachment 7 to the stage sections 53A, 53B formed by the second metal fitting 5 of the reinforcing metal fitting 3, the beam 12 and the reinforcing metal fitting 3 can be connected by the beam 2 as shown in Fig. 1. By arranging the beam 2 in this way, it becomes possible to transmit seismic forces to structures such as the beam 12 via the beam 2 even in cases where it is not possible to arrange braces.

[0059] Furthermore, when the string 2 is connected to the intersection 17A via the reinforcing metal fitting 3, the force from the string 2 is also transmitted to the ceiling board 16. In short, if the lower end of the string 2 is attached to the reinforcing metal fitting 3, it can be fixed so that the force is effectively transmitted.

[0060] For example, when an earthquake force acts in the axial direction of the rafter 15, the force is input to the reinforcing metal fitting 3 via the beam 2, which is a vertical member. The force transmitted from the reinforcing metal fitting 3 to the rafter 15 directly below is transmitted in the axial direction (material axis direction) of the rafter 15 via the reinforcing metal fitting 3, and is transmitted to the ceiling board 16 at the position of a fastening screw or the like that joins the rafter 15 and the ceiling board 16. In other words, the force transmitted from the beam 12 via the beam 2 can be transmitted straight to the rafter 15 and the ceiling board 16 without bending the transmission path.

[0061] By installing the beam 2 in this manner using the stage portions 53A, 53B of the reinforcing bracket 3, even if a brace cannot be installed, the force acting in the axial direction of the furring edge portion 15 during an earthquake can be transmitted directly from the reinforcing bracket 3 to the furring edge portion 15 directly below, and efficiently distributed to the ceiling board 16 via the furring edge portion 15.

[0062] In addition, the intersection 17A between the siding support 14 and the siding 15 can be reinforced by attaching the reinforcing metal fittings 3. Furthermore, the stage parts 53A and 53B to which the bundle 2 is connected are in contact with the upper flange 141 of the siding support 14, so that even if a load acts from above, it can be supported by the reaction force of the siding support 14.

[0063] Furthermore, various components can be easily attached to the stage sections 53A, 53B formed on a flat surface, as described later in the embodiment, in addition to the bundle 2. That is, the stage sections 53A, 53B extending on a flat surface are provided with mounting holes 531 that penetrate in the vertical direction, so that various attachments can be easily attached using fastening means such as bolts or screws. EXAMPLES

[0064] An example of use of the reinforcing metal fitting 3 of the embodiment described above will be described below with reference to Figures 6 and 7. Note that the same terms or symbols will be used to describe parts that are the same as or equivalent to those described in the embodiment described above.

[0065] In this embodiment 1, a case where an angle bar 2A is used as a specific example of a beam 2 that is a vertical member will be described. The angle bar 2A is formed of an angle iron that is substantially L-shaped in cross section. An upper portion of one of two orthogonal side surfaces is fixed in contact with a side surface of a beam 12.

[0066] The angle iron 2A has holes 22 drilled in the upper and lower sides of the side surface. The two inner surfaces of the lower part of the angle iron 2A are brought into contact with the two orthogonal outer surfaces of the central protrusion 72 of the attachment 7 as shown in FIG.

[0067] 7, a fixing bolt 74 is inserted into the hole 22 at the bottom of the angle iron 2A and the hole 721 of the central convex portion 72 to fix the bottom of the angle iron 2A to the central convex portion 72. For example, if a female thread groove is provided in the hole 721 of the central convex portion 72, the bottom of the angle iron 2A can be joined to the central convex portion 72 by screwing the fixing bolt 74 into the hole 721.

[0068] In this way, the lower part of the angle member 2A can be easily attached by the fixing bolt 74 to the attachment 7 fixed by the bolt 73 to the stage portions 53A, 53B of the reinforcing metal fitting 3.

[0069] On the other hand, if the beam 12 is made of reinforced concrete, an anchor material 21 is inserted into the hole 22 at the top of the angle bar 2A to be fixed to the beam 12. If the beam 12 is made of steel frame or the like, a bolt can be inserted into the hole 22 to fix the beam 12.

[0070] In this manner, the angle member 2A can be easily attached to the reinforcing metal fitting 3 attached to the intersection 17A. Other configurations and effects are substantially the same as those of the above-described embodiment or other examples, and therefore description thereof will be omitted. EXAMPLES

[0071] As in the above-described Example 1, an example of use of the reinforcing metal fitting 3 will be described below with reference to Fig. 8. Note that the same terms or the same reference numerals will be used to describe the same or equivalent parts as those described in the above-described embodiment or Example 1.

[0072] In this second embodiment, a case where a square pipe material 2B is used as a concrete example of the bundle material 2, which is a vertical member, will be described. The square pipe material 2B is formed of a square steel pipe having a rectangular cylindrical shape. The upper part of one of the four side surfaces is fixed in contact with the side surface of the beam 12.

[0073] The square pipe 2B has holes 22 drilled at both the top and bottom of its side surface. The lower end opening of the square pipe 2B is inserted into the central protrusion 72 of the attachment 7, and the square pipe 2B stands on the flat plate portion 71 of the attachment 7.

[0074] Fixing using the hole 22 at the bottom of the square pipe material 2B can be performed by screwing the fixing bolt 74 into the hole 721 of the central convex portion 72, as described in Example 1 above, but it may also be performed by a fixing method for the central convex portion 72 in which the hole 721 is not drilled.

[0075] For example, a female screw groove is provided in the hole 22 of the square pipe material 2B, and a fixing bolt 74 with a short shaft is screwed in so that its tip abuts against the side of the central protrusion 72. By screwing the fixing bolt 74 in from the four side surfaces of the square pipe material 2B, it becomes possible to easily adjust the inclination of the square pipe material 2B and its planar position on the flat plate portion 71.

[0076] Furthermore, it becomes possible to connect the square pipe material 2B with the lower end surface separated from the flat plate portion 71. In other words, it becomes possible to arbitrarily adjust the height direction position of the square pipe material 2B within the range of the height of the central protrusion 72.

[0077] Furthermore, by placing anti-vibration rubber or the like in the gap between the lower end surface of the raised square pipe material 2B and the flat plate portion 71, it is possible to create a connection that has sound insulation function via a sound-insulating portion as will be described later in Example 3.

[0078] On the other hand, at the upper part of the square pipe material 2B, an anchor material 21 is inserted so as to penetrate through the opposing holes 22, 22, thereby joining the square pipe material 2B to the side surface of the beam 12. Even though the square pipe material 2B has such high rigidity, it can be easily attached to the reinforcing metal fitting 3 via the attachment 7, and the intersection portion 17A and the beam 12 can be connected. Other configurations and effects are substantially the same as those of the above-described embodiment or other examples, and therefore description thereof will be omitted. EXAMPLES

[0079] Hereinafter, a suspended ceiling structure 1A according to another embodiment different from the embodiment and Examples 1 and 2 described above will be described with reference to Figures 9 to 12. Note that the same or equivalent parts as those described in the embodiment or Examples 1 and 2 will be described with the same terms or symbols.

[0080] In the suspended ceiling structure 1A described in this Example 3, as shown in Fig. 9, an existing suspended ceiling suspended by hanging bolts 13 equipped with vibration-proof hangers 94 is reinforced against earthquakes by arranging diagonal members such as braces in a manner that does not impair sound insulation. Here, the vibration-proof hangers 94 are vibration-proof members that are attached midway along the hanging bolts 13 and designed to provide sufficient sound insulation performance when the weight of the ceiling panel 16 is acting on them, as described in JP 2009-2435 A.

[0081] The suspended ceiling structure 1A is provided with a pair of braces 8, 8 as diagonal members in the furring beam receiving direction arranged in approximately a V-shape when viewed from the side along the axial direction of the furring beam receiving portion 14, and a pair of braces 8, 8 as diagonal members in the furring beam direction arranged in approximately a V-shape when viewed from the side along the axial direction of the furring beam portion 15.

[0082] The upper end of the brace 8 is fixed to the upper part of the hanging bolt 13 via a mounting hardware 81. Meanwhile, a reinforcing metal fitting 3 is attached to an intersection 17C between the siding support portion 14 and the siding portion 15. The lower end of the brace 8 is attached to the reinforcing metal fitting 3.

[0083] Specifically, as shown in FIG. 10, an attachment 7A is attached to the reinforcing metal fitting 3, and the lower end of the brace 8 is attached via a sound insulating part 9, which serves as a vibration-proof member, attached to the attachment 7A.

[0084] The soundproofing part 9 is attached to the central protrusion 72A of the attachment 7A as shown in Figures 10 to 12. The central protrusion 72A is attached in a direction rotated 45° compared to the central protrusion 72 of the attachment 7 described in the above embodiment. That is, as shown in Figure 10, the corners of the central protrusion 72A are arranged to face the axial direction of the sill receiving part 14 and the sill part 15.

[0085] The sound-proofing portion 9 is mainly composed of a square cylindrical sheath tube 91 that surrounds the outer periphery of the central convex portion 72A, an anti-vibration rubber 92 that is interposed in the gap between the central convex portion 72A and the sheath tube 91, and an attachment piece 93 for attaching the lower end of the brace 8.

[0086] The size of the sheath tube 91 is set according to the thickness of the anti-vibration rubber 92 to be interposed. By interposing the anti-vibration rubber 92 between the central convex portion 72A and the sheath tube 91, it is possible to suppress the transmission of micro-vibrations and the like between the brace 8 and the reinforcing metal fitting 3. In short, since it is sufficient to provide acoustic insulation between the brace 8 and the reinforcing metal fitting 3, the space between the central convex portion 72A and the sheath tube 91 may simply be a gap.

[0087] In this way, by interposing the anti-vibration rubber 92 and providing a gap between the central convex portion 72A and the sheath tube 91, it is possible to prevent vibrations generated on the structural body side, such as the floor slab 11, from being transmitted to the space below the ceiling board 16 via the brace 8. Conversely, it is also possible to prevent sound generated in the space below the ceiling board 16 from being transmitted to upper floors, etc. via the brace 8.

[0088] The mounting pieces 93 extend from each corner of the sheath pipe 91 in the axial direction of the sill receiving part 14 and the sill part 15. As shown in Figures 11 and 12, the arm material 82 is attached obliquely to each of the mounting pieces 93 extending in the axial direction by a bolt 821.

[0089] The lower ends of the braces 8 are joined to the arm material 82. The arm material 82 is formed into a generally L-shape in cross section for attaching the lower ends of the braces 8. The lower ends of the four braces 8 thus arranged in a generally V-shape in side view in two directions can be attached together to one sound insulation section 9.

[0090] The soundproofing portion 9 is connected to the reinforcing metal fitting 3 via the attachment 7A. By providing the soundproofing portion 9 to the reinforcing metal fitting 3 attached to the intersection 17C between the siding support portion 14 and the siding portion 15 in this way, the installation locations are consolidated, reducing the number of parts used and improving workability. In other words, compared to the case where vibration-proofing members are provided for each of the four braces 8, it is only necessary to install the soundproofing portion 9 at one location at the intersection 17C, which allows for a significant reduction in the number of parts, making this a rational solution.

[0091] In the suspended ceiling structure 1A of Example 3 configured in this manner, the braces 8 are connected to the intersections 17C via reinforcing brackets 3, so that the structure has high earthquake resistance, and since sound-proofing sections 9 are interposed before the force from the braces 8 is transmitted to the ceiling panel 16, sound-proofing function can be ensured.

[0092] In other words, by simply attaching a reinforcing bracket 3 to the intersection 17C between the furring sill support portion 14 and the furring sill portion 15 and connecting each of the four braces 8 to the reinforcing bracket 3 via a sound-proofing portion 9, earthquake resistance and sound insulation can be efficiently improved. Other configurations and effects are substantially the same as those of the above-described embodiment or other examples, and therefore description thereof will be omitted.

[0093] Although the embodiment and examples of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment or example, and design changes that do not deviate from the gist of the present invention are included in the present invention.

[0094] For example, in the above-mentioned embodiment and examples, a case has been described in which a brace 8 with a bundle material (2, 2A, 2B) or a sound-insulating portion 9 is connected to the stage portions 53A, 53B of the reinforcing bracket 3 via an attachment 7, but this is not limited to this, and various attachments and components can be connected to the plane formed by the stage portions 53A, 53B of the reinforcing bracket 3.

[0095] In addition, in the above embodiment, the reinforcing brackets 3 are attached only to the intersections 17A where the bundle material 2 is placed, but by attaching the reinforcing brackets 3 to other intersections 17B instead of reinforcing clips 6, etc., it is possible to create a suspended ceiling structure that is less likely to fall off even when the shaking caused by a major earthquake becomes very large.

[0096] In short, the ceiling can be more effectively prevented from falling off by increasing the joint strength of the intersection between the furring strip receiving portion 14 and the furring strip portion 15 with the reinforcing metal fittings 3. For example, even in the case of a suspended ceiling that does not have beams 2 or braces 8, by attaching the reinforcing metal fittings 3 to the intersection, it is possible to prevent the ceiling from falling off due to wind swaying or the continuous action of vertical load. [Explanation of symbols]

[0097] 1,1A: Suspended ceiling structure 11: Floor slab (structure) 12: Beam (structure) 14: Roof joist support 141: Upper flange (upper end surface) 15: Edge 151: Lip part 17A, 17C: Intersection 2: Beam (vertical member) 2A: Angle material (vertical member) 2B: Square pipe material (vertical member) 3: Reinforcement bracket 4: First metal fitting 41: Bending section 42: Notch 43: Screw material (jointing means) 5: Second metal fitting 51: Lip side plate (plate) 512: Hook section 52: Stop plate (plate) 53A, 53B: Stage section 531: Mounting hole 54: Bolt section 8: Brace (diagonal member) 9: Sound insulation section

Claims

1. A suspended ceiling structure having a soffit receiving portion and a soffit portion suspended from a structural body, A reinforcing metal fitting attached to an intersection between the furring strip receiving portion and the furring strip having a lip portion; a vertical member having an upper portion fixed to the structure; The reinforcing metal fitting is A first metal fitting fixed to the sill receiving portion disposed above; A second metal fitting is provided which is fixed to the edge portion by straddling the first metal fitting, The first metal fitting has a bent portion that is straddled over the furring strip receiving portion, a notch portion formed in a lower portion so that the furring strip can be fitted therein, and a joining means for fixing the first metal fitting to the furring strip receiving portion; The second metal fitting has plate portions that face each other across the lip portion of the soffit portion, stage portions that extend in opposite directions from the upper edges of the plate portions while contacting the upper end surfaces of the soffit receiving portions to form a flat surface, hook portions provided on the lower portion of the plate portions on the lip portion side, and bolt portions that are arranged on both sides of the soffit receiving portion to introduce a fastening force between the plate portions when the hook portions are hooked onto the lip portion; A suspended ceiling structure, characterized in that the lower part of the vertical member is connected to the stage portion of the reinforcing metal fitting.

2. 2. The suspended ceiling structure according to claim 1, wherein a sound insulating portion is provided on a lower end surface of the vertical member.

3. A suspended ceiling structure having a soffit receiving portion and a soffit portion suspended from a structural body via a suspension bolt, A reinforcing metal fitting attached to an intersection between the furring strip receiving portion and the furring strip having a lip portion; A diagonal member arranged in a generally V-shape in side view along the axial direction of at least one of the furring strip receiving portion and the furring strip; The reinforcing metal fitting is A first metal fitting fixed to the sill receiving portion disposed above; A second metal fitting is provided which is fixed to the edge portion by straddling the first metal fitting, The first metal fitting has a bent portion that is straddled over the furring strip receiving portion, a notch portion formed in a lower portion so that the furring strip can be fitted therein, and a joining means for fixing the first metal fitting to the furring strip receiving portion; The second metal fitting has plate portions that face each other across the lip portion of the soffit portion, stage portions that extend in opposite directions from the upper edges of the plate portions while contacting the upper end surfaces of the soffit receiving portions to form a flat surface, hook portions provided on the lower portion of the plate portions on the lip portion side, and bolt portions that are arranged on both sides of the soffit receiving portion to introduce a fastening force between the plate portions when the hook portions are hooked onto the lip portion; A suspended ceiling structure characterized in that the upper end of the diagonal member is fixed to the upper part of the hanging bolt, and the lower part of the diagonal member is connected to the stage part of the reinforcing metal fitting via a sound-proofing part.

4. 4. The suspended ceiling structure according to claim 1, wherein the stage portion has a mounting hole extending therethrough in the vertical direction.

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