Soundproof earthquake-resistant reinforcement metal fittings and earthquake-resistant reinforcement structures for suspended ceilings

Abstract

To provide a sound-insulating aseismic reinforcement metal fitting that offers high aseismic and sound-insulating performances, and an aseismic reinforcement structure of a suspended ceiling fitted therewith.SOLUTION: A sound insulating aseismic reinforcement metal fitting is for offering a sound-insulating function and reinforcing a suspended ceiling structure 1 having a ceiling joist receiving part 14 and a ceiling joist 15 suspended from a floor slab 11. Furthermore, the sound-insulating aseismic metal fitting includes a first metal fitting fixed on the ceiling joist receiving part disposed in an upper part, a second metal fitting fixed on the ceiling joist over and across the first metal fitting, integrating means for connecting the first and second metal fittings, and a sound-insulating metal fitting 2 fitted on a top surface of the second metal fitting. The sound-insulating metal fitting has an inner member fixed on the second metal fitting and formed with a columnar shaft portion, an outer member having a plurality of fitting pieces formed thereon for connecting with an end of a brace 8, the outer member also having a sheath pipe portion that surrounds the shaft portion, and an anti-vibration member interposed between the shaft portion and the sheath pipe portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sound-insulating earthquake-resistant reinforcing bracket that reinforces a suspended ceiling structure having a rafter support and a rafter suspended from a structural body such as a building at the intersection between the rafter support and the rafter, and to an earthquake-resistant reinforcing structure for a suspended ceiling to which the bracket is attached. [Background technology]

[0002] As disclosed in Patent Documents 1-3, earthquake-resistant reinforcement fittings are known that reinforce suspended ceiling structures having rafter support portions and rafter portions suspended from building structures such as floor slabs or beams at the intersections between the rafter support portions and the rafter portions.

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

[0004] Furthermore, as disclosed in Patent Document 4, vibration-isolating members are sometimes placed to prevent noise caused by vibrations generated by vehicle traffic, walking, etc. in the structure supporting the suspended ceiling being transmitted to the ceiling panels via the suspension bolts and braces. This document discloses a configuration in which vibration-isolating hangers are attached midway on the suspension bolts, and vibration-isolating members are attached midway on the braces. [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] Japanese Patent Application Laid-Open No. 2009-2435 Summary of the Invention [Problem to be solved by the invention]

[0006] However, although the suspension bolt vibration-proof hangers are designed to provide sufficient sound insulation when the weight of the ceiling panel is acting on them, if a brace with vibration-proofing material attached is placed in the middle, the brace will have to bear part of the weight of the ceiling panel, and there is a possibility that the desired sound insulation performance will not be achieved.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a sound-insulating earthquake-resistant reinforcement metal fitting that has excellent earthquake resistance and sound-insulating performance, and an earthquake-resistant reinforcement structure for a suspended ceiling to which the metal fitting is attached. [Means for solving the problem]

[0008] In order to achieve the above object, the sound-insulating earthquake-resistant reinforcing metal fitting of the present invention is a sound-insulating earthquake-resistant reinforcing metal fitting that has a sound-insulating function and reinforces a suspended ceiling structure having a soffit support portion and a soffit portion suspended from a structure at the intersection of the soffit support portion and the soffit portion having a lip portion, and is provided with a first metal fitting fixed to the soffit support portion arranged above, a second metal fitting that straddles the first metal fitting and is fixed to the soffit portion, an integration means that joins the first metal fitting and the second metal fitting, and a sound-insulating metal fitting attached to the upper surface of the second metal fitting, and the first metal fitting has a bent portion that straddles the soffit support portion, a notch formed in the lower part so that the soffit portion can be fitted, and a joining means for fixing to the soffit support portion. The second fitting has plate portions that face each other across the lip portion of the rough edge portion, a hook portion provided on the lower part of the plate portion on the lip portion side, a bolt portion that introduces a fastening force between the plate portions when the hook portion is hooked onto the lip portion, a washer portion of the bolt portion, and a limiting rib portion that protrudes from one of the plate portions to limit the rotation of the washer portion, and the sound-proof fitting has an inner member that is fixed to the second fitting and is formed with a columnar shaft portion, an outer member that is formed with a plurality of mounting pieces for connecting ends of diagonal members and is formed with a sheath tube portion that surrounds the periphery of the shaft portion, and an vibration-damping material or an air gap interposed between the shaft portion and the sheath tube portion.

[0009] Furthermore, the invention for an earthquake-resistant reinforcement structure for a suspended ceiling is an earthquake-resistant reinforcement structure for a suspended ceiling that reinforces a suspended ceiling structure having a soffit support portion and a soffit portion suspended from a structural body and also adds sound-proofing functionality, characterized in that it comprises the above-mentioned sound-insulating earthquake-resistant reinforcement fittings attached to the intersection of the soffit support portion and the soffit portion which has 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, the lower end of which is connected to the mounting piece of the sound-insulating fittings. [Effects of the Invention]

[0010] The sound-insulating earthquake-resistant reinforcing bracket of the present invention, configured as described above, reinforces a suspended ceiling structure at the intersection between the soffit support and the soffit having a lip. In this sound-insulating earthquake-resistant reinforcing bracket, a first bracket fixed to the soffit support is straddled by a second bracket fixed to the soffit, and the two brackets are joined by an integration means. Furthermore, a limiting rib extends from one of a pair of plate sections facing each other across the lip of the soffit, and this limiting rib limits the rotation of the washer of the bolt.

[0011] This allows the washer to be positioned in the correct direction, and the desired amount of fastening force from the bolt can be applied to crush the lip, thereby imparting high rigidity and earthquake resistance to the suspended ceiling structure. In addition, by providing limiting ribs that restrict the rotation of the washer from the side edges of the plate, the rigidity of the plate itself against bending can be increased.

[0012] Furthermore, the sound-insulating metal fitting attached to the top surface of the second metal fitting has a columnar shaft portion covered with a sheath tube portion, with vibration-damping material or an air gap interposed between the shaft portion and the sheath tube portion. The sound-insulating metal fitting also has multiple mounting pieces for connecting the ends of diagonal members such as braces.

[0013] In this configuration, the shaft fixed to the rafter support is surrounded by a sheath pipe to which the end of the diagonal member is connected via vibration-damping material or an air gap, so the diagonal member does not bear the weight of the ceiling panel, allowing the sound-insulating performance of the vibration-damping hanger of the suspension bolt to be fully utilized. In other words, vibration transmission between the rafter support and the diagonal member can be insulated when there is no earthquake. Furthermore, by placing sound-insulating metal fittings where multiple diagonal members, such as braces, are concentrated, a single fitting can provide sound-insulating functionality to multiple diagonal members.

[0014] Furthermore, if the earthquake-resistant reinforcement structure for a suspended ceiling is one in which the lower ends of diagonal members arranged in a roughly V-shape when viewed from the side are attached to sound-insulating earthquake-resistant reinforcement metal fittings, it will be possible to create a structure in which axial force is transmitted effectively during an earthquake. In particular, if the lower ends of diagonal members arranged in a roughly V-shape when viewed from the side on two sides are collectively attached to sound-insulating earthquake-resistant reinforcement metal fittings, the amount of work required can be consolidated and construction can be done efficiently. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a side view for explaining the configuration of the earthquake-resistant reinforcement structure of a suspended ceiling of this embodiment. FIG. [Figure 2] FIG. 2 is a perspective view illustrating the configuration of a suspended ceiling structure. [Figure 3] FIG. 2 is an exploded perspective view illustrating an earthquake-resistant reinforcing metal fitting that constitutes the sound-insulating earthquake-resistant reinforcing metal fitting of the present embodiment. [Figure 4] FIG. 10 is a perspective view illustrating the lip side plate portion of the second metal fitting that constitutes the earthquake-resistant reinforcing metal fitting. [Figure 5] FIG. 2 is a perspective view illustrating the configuration of an earthquake-resistant reinforcing bracket. [Figure 6] FIG. 10 is a perspective view illustrating a state in which an earthquake-resistant reinforcing bracket is attached to an intersection. [Figure 7] FIG. 2 is a perspective view illustrating the configuration of the internal material of the sound-insulating metal fitting. [Figure 8] FIG. 2 is a perspective view illustrating the configuration of the outer member of the sound-insulating metal fitting. [Figure 9] FIG. 10 is a plan view illustrating the state in which a sound-insulating metal fitting is attached to an earthquake-resistant reinforcing metal fitting. [Figure 10] FIG. 10 is a cross-sectional view taken along the arrow AA in FIG. 9. [Figure 11] 10 is a cross-sectional view taken along the arrow BB in FIG. 9. [Figure 12] 3 is an explanatory diagram showing a schematic diagram of the relationship of forces acting on the sound-insulating earthquake-resistant reinforcing metal fitting of the present embodiment. FIG. [Figure 13] 1 is an explanatory diagram showing a schematic state of the earthquake-resistant reinforcement structure of a suspended ceiling according to the present embodiment. FIG. [Figure 14]FIG. 2 is a perspective view illustrating a lip side plate portion of a second metal fitting of an earthquake-resistant reinforcing metal fitting that constitutes the sound-insulating earthquake-resistant reinforcing metal fitting of Example 1. [Figure 15] 1A and 1B are diagrams illustrating the configuration of the internal member of the sound-insulating metal fitting of Example 1, where (a) is a perspective view and (b) is a side view. [Figure 16] 1A and 1B are diagrams illustrating the configuration of the outer member of the sound-insulating metal fitting of Example 1, where (a) is a perspective view and (b) is a side view. [Figure 17] 1 is a plan view illustrating the configuration of a sound-insulating earthquake-resistant reinforcing metal fitting according to a first embodiment. FIG. [Figure 18] 18 is a cross-sectional view taken along the CC arrow direction in FIG. 17. [Figure 19] FIG. 18 is a cross-sectional view taken along the arrow DD in FIG. 17. [Figure 20] 1A and 1B are diagrams illustrating the operation of the sound-insulating earthquake-resistant reinforcing metal fitting of Example 1 when a rotational force is applied thereto, where (a) is an overall view and (b) is a partially enlarged view. [Figure 21] FIG. 10 is a plan view illustrating the configuration of the sound-insulating earthquake-resistant reinforcing metal fitting of Example 2. [Figure 22] 22 is a cross-sectional view taken along the arrow EE in FIG. 21. [Figure 23] 22 is a cross-sectional view taken along the arrow FF in FIG. 21. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the accompanying drawings. Figures 1 and 2 are diagrams illustrating the configuration of a suspended ceiling structure 1 that serves as an earthquake-resistant reinforcement structure for a suspended ceiling according to this embodiment.

[0017] The suspended ceiling structure 1 is installed in various buildings, such as gymnasiums, assembly halls, public facilities that serve as bases for disaster emergency response measures, and buildings. It can also be applied to improve the earthquake resistance of "specified ceilings" that are required to "prevent ceilings from falling in buildings" as defined in the Enforcement Order of the Building Standards Act, which was partially revised on August 5, 2013, as well as other suspended ceilings. Furthermore, the earthquake-resistant reinforcement structure for a suspended ceiling of this embodiment can be applied to both existing suspended ceilings and newly constructed suspended ceilings.

[0018] As shown in Figure 1, multiple suspension bolts 13 are hung at intervals from the underside of the floor slab 11 and beams that form the structural body of the building, and the siding support portion 14 is hung from the hanger 131 at the lower end of the suspension bolt 13, which serves as the suspension member.

[0019] 2, a siding portion 15 is attached to the siding support portion 14 at an interval in the axial direction thereof, and in a direction substantially perpendicular to the siding support portion 14. Furthermore, a ceiling board 16 such as a gypsum board is attached to the underside of the siding portion 15.

[0020] If this suspended ceiling is classified as a "special ceiling," the end 16a of the ceiling panel 16 can be spaced at least 6 cm away from the wall 12 of the building, as shown in Figure 1, to prevent the end 16a from being pressed against the wall 12 and being damaged by shaking during an earthquake.

[0021] In this embodiment, we will explain the case where an existing suspended ceiling suspended by hanging bolts 13 equipped with vibration-proof hangers 7 is reinforced against earthquakes by arranging diagonal members such as braces in a manner that does not impair sound insulation.

[0022] As shown in Figure 2, the suspended ceiling structure 1 of this embodiment comprises a pair of braces 8, 8 as diagonal members in the soffit support direction arranged in an approximately V-shape when viewed from the side along the axial direction of the soffit support portion 14, and a pair of braces 8, 8 as diagonal members in the soffit direction arranged in an approximately V-shape when viewed from the side along the axial direction of the soffit portion 15.

[0023] The upper end of the brace 8 is fixed to the top of the hanging bolt 13 via a mounting hardware 81. Meanwhile, a sound-insulating earthquake-resistant reinforcement bracket of this embodiment is placed at the intersection 17A between the soffit receiving portion 14 and the soffit portion 15. This sound-insulating earthquake-resistant reinforcement bracket is composed of an earthquake-resistant reinforcement bracket 3 attached to the intersection 17A, and a sound-insulating bracket 2 interposed between the earthquake-resistant reinforcement bracket 3 and the lower end of the brace 8.

[0024] As shown in Figures 3 to 5, the earthquake-resistant reinforcing metal fittings 3 are attached to the intersection 17A between the joist support portion 14 and the joist portion 15. The lower ends of the braces 8 are connected to the earthquake-resistant reinforcing metal fittings 3 via the sound-insulating metal fittings 2.

[0025] The sill support portion 14 onto which the hanger 131 of the hanging bolt 13 is hooked is formed in a roughly U-shape in cross section, as shown in Figure 3, by an upper flange 141 that forms the upper end surface of a roughly horizontal plane, a lower flange 142 that is roughly parallel to it, and a web 143 that is roughly vertical and connects the side edges of the upper flange 141 and the lower flange 142.

[0026] On the other hand, the siding part 15 fixed to the siding support part 14 is formed by a bottom part 153, side wall parts 152, 152 rising from both sides of the bottom part 153, and lip parts 151, 151 bent twice inward from the upper edges of each of the side wall parts 152, 152. In other words, a steel material having a generally U-shaped cross section and having lip parts 151, 151 can be used for the siding part 15. In addition, the lip part 151 is formed by the upper surface and the hanging surface into a generally L-shaped cross section facing horizontally.

[0027] As shown in Figures 3 to 5, the earthquake-resistant reinforcement fittings 3 are mainly composed of a first fitting 4 fixed to the soffit support portion 14 located above, a second fitting 5 straddling the first fitting 4 and fixed to the soffit portion 15, and an integration means for joining the first fitting 4 and the second fitting 5.

[0028] 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 at the bottom so that the sill portion 15 can be fitted into it, and a screw material 43 as a joining means for fixing the first metal fitting 4 to the sill receiving portion 14.

[0029] 3, the bent portion 41 is formed in a generally gate-shaped cross section so as to cover the siding support 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 support portion 14.

[0030] The lower portion of the bent portion 41 is provided with a notch 42 cut into a shape that allows the upper portion of the edge portion 15 to fit therein. In other words, the notch 42 surrounds the upper and both sides of the edge portion 15.

[0031] 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 end of the side wall portions 152, 152.

[0032] Furthermore, on both sides of the bent portion 41, screws 43, 43 are continuously passed 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.

[0033] In this way, by using the screws 43 that penetrate both the first metal fitting 4 and the siding support 14 as the joining means, a strong joint can be achieved due to the shear resistance of the screws 43. In other words, if the screws 43 that penetrate the first metal fitting 4 are screwed directly into the web 143 of the siding support 14, a strong joint can be achieved that does not slip between the siding support 14 and the first metal fitting 4. In this state, even if the siding support 14 and the siding support 15 are not joined, movement of the first metal fitting 4 in directions other than the axial direction of the siding support 15 is limited.

[0034] Furthermore, ribs 44, 44 protrude from both axial 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.

[0035] In this way, the second fitting 5 is placed over the first fitting 4 attached to the siding support portion 14. The second fitting 5 has a pair of plate portions (51, 52) that face each other across one lip portion 151 of the siding portion 15.

[0036] The pair of plate portions (51, 52) are formed of steel plates or the like with central grooves 511, 521 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.

[0037] 3 and 4, a hook portion 512 that is generally L-shaped when viewed from the side is provided on the lower part of the lip side plate portion 51. This hook portion 512 is provided in a position where it can be hooked onto the lip portion 151 from below. The hook portion 512 is formed by cutting a portion of the lower part of the lip side plate portion 51 into the upper and both side edges of a rectangle and tilting it towards the lip portion 151.

[0038] On the other hand, an insertion hole 513 is drilled above the hook portion 512, and a bolt portion 54 passes through it, sandwiching the lip portion 151. This bolt portion 54 passes from the lip portion side plate portion 51 toward the insertion hole 523 of the retaining plate portion 52, and a nut is attached to the tip that protrudes toward the retaining plate portion 52.

[0039] 6, a washer 55 formed of a rectangular (approximately square) steel plate or the like is disposed on the head side of the bolt 54. That is, the fastening force introduced between the lip side plate 51 and the retaining plate 52 by tightening the bolt 54 is transmitted through the contact surface between the washer 55 and the lip side plate 51.

[0040] 4, limiting ribs 514 protrude from the side edges of the lip side plate 51 to limit the rotation of the washer 55. More specifically, limiting ribs 514 protrude from both axial edges of the siding 15 of the lip side plate 51 in a direction substantially parallel to the axial direction of the siding support 14. The limiting ribs 514 can increase the rigidity of the lip side plate 51, which is manufactured by bending a plate material such as a steel plate.

[0041] Furthermore, as shown in Figure 6, rib portions 522, 522 extend from both axial edges of the sill portion 15 of the retaining plate portion 52 in a direction approximately parallel to the axial direction of the sill support portion 14, thereby increasing rigidity.

[0042] 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. In other words, 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.

[0043] The second fitting 5 is crimped by the introduced fastening force and the deformed lip portion 151, and movement of the siding portion 15 in the axial direction is restricted. In addition, the lip 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 siding support portion 14, also restrict movement of the siding portion 15 of the second fitting 5 in the axial direction.

[0044] 4, a joint piece 515 projects from one edge of the groove 511 of the lip side plate 51. A plurality of screws 31, 31 serving as integration means for joining the first fitting 4 and the second fitting 5 are screwed into the joint piece 515, which projects substantially perpendicularly from the lip side plate 51 and is arranged along the outer surface of the bent portion 41 of the first fitting 4 (see FIG. 10). Holes 515a for screwing in the screws 31 may be drilled in advance in the joint piece 515.

[0045] Furthermore, the pair of plate portions (51, 52) are provided with stage portions 53A, 53B extending in opposite directions from the upper edges of each plate portion to form a flat surface while contacting the upper flange 141 that forms the upper end surface of the sill support 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.

[0046] The stage portion 53A is formed with a recess 532A that continues to the groove 511 provided in the center of the lip side plate portion 51 so that the siding support portion 14 can be straddled. On the other hand, the stage portion 53B is formed with a recess 532B that continues to the groove 521 provided in the center of the stop plate portion 52 so that the siding support portion 14 can be straddled.

[0047] The recesses 532A, 532B provided in each of the pair of stage portions 53A, 53B form a continuous rectangular space as shown in Fig. 5. The space formed by these recesses 532A, 532B accommodates the upper surface of the bent portion 41 of the first fitting 4. In short, the stage portions 53A, 53B and the upper surface of the bent portion 41 form a wide, approximately flush rectangular plane on the sill support portion 14.

[0048] A mounting hole 531 is drilled in the wide rectangular plane formed by the pair of stage portions 53A, 53B so as to extend from the upper flange 141, for example near a corner, and penetrates in the vertical direction.

[0049] In this way, the intersection 17A between the siding support 14 and the siding 15 can be fixed with the highly rigid earthquake-resistant reinforcing metal fitting 3. By attaching this earthquake-resistant reinforcing metal fitting 3, the joint strength of the intersection 17A is increased and reinforced. Here, by using multiple screws 31 as the means for integrating the first metal fitting 4 and the second metal 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.

[0050] In addition, the stage portions 53A, 53B of the earthquake-resistant reinforcement fittings 3, to which force from the brace 8 is transmitted via the sound-proof fittings 2 described later, are in contact with the upper flange 141 of the soffit support portion 14, so that even if a load acts from above, it can be supported by the reaction force of the soffit support portion 14.

[0051] 2, reinforcing clips 6 and clips 61 are attached to intersections other than intersection 17A where earthquake-resistant reinforcing brackets 3 are attached. Reinforcing clips 6 can connect soffit support portion 14 and soffit portion 15 more firmly than ordinary clips 61 attached to intersections between soffit support portion 14 and soffit portion 15 where earthquake-resistant reinforcing brackets 3 are not attached.

[0052] The sound-insulating metal fitting 2, which constitutes the other half of the sound-insulating earthquake-resistant reinforcement metal fittings of this embodiment, is mainly composed of an inner member 21 fixed to the earthquake-resistant reinforcement metal fitting 3, an outer member 22 to which the end of the brace 8 is connected, and vibration-damping material 23 which serves as a sound-insulating functional part interposed between the inner member 21 and the outer member 22, as shown in Figures 7 and 8.

[0053] 7, the inner member 21 includes a shaft portion 212 formed in a columnar shape at the center of a flat plate portion 211. That is, the inner member 21 includes a flat plate portion 211 that is rectangular in plan view, such as a square, and a shaft portion 212 that protrudes upward from the center of the flat plate portion 211. When both the flat plate portion 211 and the shaft portion 212 are square in plan view, the positional relationship between them is a relative positional relationship rotated 45° from the position where the orientations of the corner portions match.

[0054] Bolt holes 214 are drilled at each corner of the flat plate portion 211. These bolt holes 214 are holes for fixing the inner member 21 to the earthquake-resistant reinforcement bracket 3. The shaft portion 212 of the inner member 21 can be formed, for example, from a rectangular steel pipe. In addition, by closing the upper end opening of the square steel pipe with an upper cover portion 213, the rigidity of the shaft portion 212 can be increased.

[0055] As shown in Figures 9 and 10, vibration-isolating material 23 is attached to the periphery of shaft portion 212 of this internal member 21. Vibration-isolating material 23 is made of vibration-isolating rubber or the like. Vibration-isolating material 23 is formed in the shape of a rectangular sheet and attached to each of the four side surfaces of shaft portion 212. Note that vibration-isolating material 23 may also be formed in the shape of a square tube.

[0056] It is sufficient that the vibration-damping material 23 is attached to a part of the height direction of the shaft portion 212. As will be described later, the relative positional relationship between the inner member 21 and the outer member 22 in the height direction will change, but it is sufficient that the vibration-damping material 23 is interposed between the inner member 21 and the outer member 22 regardless of the positional relationship between the inner member 21 and the outer member 22 within the range of use.

[0057] The outer member 22 is formed in a cylindrical shape surrounding the shaft portion 212 of the inner member 21 and the vibration-damping material 23, and is mainly composed of a square cylindrical sheath tube portion 221 and multiple mounting pieces 222 for attaching the lower end of the brace 8, as shown in Figure 8.

[0058] Sheath tube portion 221 is formed from a square steel pipe and is shorter than shaft portion 212. In other words, shaft portion 212 is formed to be longer than sheath tube portion 221. Further, at the upper portion of each side surface of sheath tube portion 221, there is provided a screw hole 224 with an internal thread groove so that a screw member can be screwed in.

[0059] A plurality of screw holes 224 are provided at intervals in the height direction on each side surface. The sheath tube portion 221 shown in Fig. 8 has three screw holes 224 per side surface, arranged in a row at the center in the width direction of the side surface. As shown in Figs. 9 and 10, support screws 25, which are screw members whose tips can be brought into contact with the side surface of the shaft portion 212, are inserted into these screw holes 224.

[0060] Additionally, a plurality of mounting pieces 222 are provided on the lower part of the sheath pipe part 221. In the outer member 22 shown in Fig. 8, four mounting pieces 222 extend from each corner of the sheath pipe part 221. The extension direction of these four mounting pieces 222 coincides with the axial direction of the soffit receiving part 14 and the axial direction of the soffit part 15, as shown in Fig. 9. Additionally, mounting holes 223 are drilled in the mounting pieces 222 to insert fixing bolts or the like.

[0061] Details will be given later, but when the suspended ceiling structure 1 is in its normal state, a gap is created between the lower end surface of the sheath pipe portion 221 of the outer member 22 and the upper surface of the flat plate portion 211 of the inner member 21 to provide acoustic insulation.

[0062] On the other hand, since vibration-damping material 23 is interposed between the outer surface of shaft portion 212 and the inner surface of sheath tube portion 221, it is possible to suppress the transmission of minute vibrations and the like between brace 8 and earthquake-resistant reinforcement bracket 3.

[0063] 9 to 11 are plan views and cross-sectional views illustrating a sound-insulating earthquake-resistant reinforcement bracket of this embodiment in which a sound-insulating bracket 2 is attached to an earthquake-resistant reinforcement bracket 3. That is, the sound-insulating bracket 2 is attached to stage portions 53A and 53B of the earthquake-resistant reinforcement bracket 3 attached to the intersection 17A.

[0064] Bolt holes 214 are drilled in the corners of the flat plate portion 211 of the inner member 21 that constitutes the lower part of the sound-insulating metal fitting 2 at positions that overlap with the mounting holes 531 of the stage portions 53A and 53B (see FIG. 7). The inner member 21 is fixed to the earthquake-resistant reinforcement metal fitting 3 by passing bolts 24 through the bolt holes 214 and the mounting holes 531 (see FIG. 6) and fastening them with nuts 241. If the mounting holes 531 of the stage portions 53A and 53B have female threads, the inner member 21 can be fixed by bolts 24 that are screwed in from above without using nuts.

[0065] The mounting pieces 222 of the outer member 22, which are attached so as to surround the shaft portion 212 of the inner member 21, extend from each corner portion of the sheath tube portion 221 of the outer member 22 in the axial direction of the sill receiving portion 14 and the sill portion 15, respectively.

[0066] 10 and 11, arm members 82 are attached obliquely to the mounting pieces 222 extending in the axial direction by bolts 821. The lower ends of the braces 8 are joined to the arm members 82.

[0067] The arm material 82 is formed in a generally L-shaped cross section for attaching the lower ends of the braces 8. The lower ends of the four braces 8 arranged in two directions in a generally V-shape when viewed from the side can be attached together to one sound-insulating metal fitting 2.

[0068] Furthermore, by interposing the sound-proofing metal fittings 2, it is possible to prevent vibrations and sounds generated on the structural body side, such as the floor slab 11, from being transmitted via the braces 8 to the space below the ceiling boards 16. Conversely, it is also possible to prevent sounds generated in the space below the ceiling boards 16 from being transmitted via the braces 8 to upper floors, etc.

[0069] Furthermore, by providing the sound-insulating brackets 2 to the earthquake-resistant reinforcement brackets 3 attached to the intersection 17A between the joist support 14 and the joist 15, the installation locations are consolidated, reducing the number of parts used and improving workability. In other words, compared to the case where vibration-damping members are interposed in each of the four braces 8, it is only necessary to install the sound-insulating brackets 2 in one location at the intersection 17A, which significantly reduces the number of parts and is therefore more rational.

[0070] Next, we will explain how to use the support screws 25 of the sound-insulating metal fittings 2. Figure 13 is a diagram showing a schematic diagram of the suspended ceiling structure 1 and sound-insulating metal fittings 2. The suspended ceiling structure 1, which is suspended by suspension bolts 13, which are elastic axial force members, can be represented as a model in which the suspension bolts 13 and braces 8 are set by axial rigidity.

[0071] The state shown on the left side of Figure 13 is a model of the state before the ceiling board 16 is attached to the siding (not shown) supported by the siding support 14 that forms the ceiling foundation. Here, the overall axial stiffness of the hanging bolt 13 is set as a series connection of hanging members with axial stiffness 2k1 sandwiching the vibration-proof hanger 7 with low axial stiffness k3, and the vertical component of the axial stiffness of the brace 8 is k 2v Here, as shown in the enlarged view on the left, the connection between the brace 8 and the ceiling substrate is premised on the presence of sound-insulating metal fittings 2.

[0072] In normal construction procedures, when a ceiling board 16 is attached to the ceiling substrate suspended from the floor slab 11 in this state and a weight W is added, the ceiling substrate will sink by δ. The resistance of the suspension bolt 13 at this time is r1, the resistance of the vibration-proof hanger 7 is r3, and the vertical component of the resistance of one brace 8 is r 2v / 2.

[0073] As shown in the enlarged view on the right side of Figure 13, the state of the sound-insulating metal fittings 2 after the ceiling board 16 has been attached is such that the outer member 22 is spaced apart from the inner member 21, and only the vibration-damping material 23 can be interposed between the inner member 21 and the outer member 22. In other words, acoustic insulation is achieved between the inner member 21 and the outer member 22, and it can be said that sound insulation can be ensured by interposing the sound-insulating metal fittings 2 between the brace 8 and the joist support part 14. In addition, since the inner member 21 and the brace 8 are also in a mechanically insulated state, the vertical component resistance r 2v The resistance of the brace 8, illustrated as / 2, becomes zero.

[0074] As described above, the relative positional relationship in the height direction between the inner member 21 and the outer member 22 changes before and after the ceiling panel 16 is attached, and this is taken into consideration when using the support screws 25. First, the flat plate portion 211 of the inner member 21 is placed on the stage portions 53A and 53B of the earthquake-resistant reinforcement bracket 3 attached to the intersection portion 17A, and fixed with the bolts 24 and nuts 241.

[0075] Then, the sheath pipe portion 221 of the outer member 22 is placed over the shaft portion 212 to which the vibration-proofing material 23 has been attached. The outer member 22 is lowered to a position where the lower end surface of the sheath pipe portion 221 contacts the upper surface of the flat plate portion 211. With the outer member 22 placed on the flat plate portion 211 in this manner, the horizontality of the sheath pipe portion 221 is ensured.

[0076] In this state, the support screw 25 is screwed into the screw hole 224 at the center in the height direction of the sheath tube portion 221, and the tip of the support screw 25 is brought into contact with the side surface of the shaft portion 212. The support screw 25 is tightened from at least one pair of side surfaces of the sheath tube portion 221 that sandwich the shaft portion 212. In short, by having the support screws 25 protrude from both sides that sandwich the shaft portion 212, the shaft portion 212 can be positioned in the hollow of the sheath tube portion 221 without being biased.

[0077] The outer member 22 fixed to the shaft portion 212 by tightening the support screws 25 resists the force that tends to cause rigid body rotation when connecting the brace 8, so the lower end of the brace 8 can be connected to the mounting piece 222 of the outer member 22 in a stable state. In this embodiment, the support screws 25 are attached to all four side surfaces of the sheath tube portion 221, so rigid body rotation can be more reliably suppressed.

[0078] After the work of fixing the four braces 8 to the four mounting pieces 222 in order is completed, all of the support screws 25 are loosened. At this time, the support screws 25 are loosened so that the tips of the support screws 25 and the shaft portions 212 are in a positional relationship where they are as close as possible to each other while still being completely separated from each other.

[0079] Then, the ceiling board 16 is attached to the underside of the edge portion 15. At this time, if there is no restraint by the support screws 25, the position of the inner member 21 will drop due to the weight of the ceiling board 16, etc. In other words, the relative position of the sheath tube portion 221 with respect to the shaft portion 212 will move upward.

[0080] The length of the shaft portion 212 is set to a length that allows the upper end of the shaft portion 212 to remain protruding above the upper end of the sheath tube portion 221 even if movement occurs due to the attachment of the ceiling plate 16.

[0081] With this configuration, when a horizontal force Q acts in the right direction as shown in Figure 12 during an earthquake, for example, the shaft portion 212 undergoes shear displacement in the direction of arrow H1 and comes into contact with the sheath tube portion 221. To resist the force generated by this contact, the brace 8 that inputs the compressive force on the right and the brace 8 that outputs the tensile force on the left begin to work, causing the sheath tube portion 221 to start rotating clockwise. In short, the top support screw 25 pushes the shaft portion 212 to the right, and the bottom support screw 25 pushes the shaft portion 212 to the left.

[0082] The resultant force of both acts on the shaft portion 212 as indicated by the arrow H2, and generates a rocking moment M that rotates the earthquake-resistant reinforcement bracket 3 counterclockwise. R If vibration-proofing material 23 is present, it comes into contact with sheath tube portion 221 due to shear displacement (arrow H1), and the force transmitted from there also becomes a component of the reaction force indicated by arrow H2.

[0083] In contrast, the pushing force of the top support screw 25, which is located at a position higher than the position where the reaction force (H2) acts, generates a clockwise moment with an arm of length L to the position of the fastening screw 161 that fixes the ceiling panel 16 to the edge portion 15.

[0084] This moment is the rocking moment M R The longer the arm length L, the better the cancellation efficiency. In short, by increasing the length of the shaft portion 212 and positioning the uppermost support screw 25 at a higher position, the rocking moment M along the axial direction of the edge portion 15 can be efficiently canceled out. R This will allow the two to be offset.

[0085] Here, this countervailing moment is the rocking moment M RTherefore, as shown in FIG. 8, providing many screw holes 224 in sheath tube portion 221 makes it easier to make fine adjustments.

[0086] Furthermore, in a configuration in which force is transmitted between sheath tube portion 221 and shaft portion 212 only via vibration-damping material 23, the low rigidity of vibration-damping material 23 would affect the overall rigidity. In response to this, the rigidity of sound-insulating metal fitting 2 can be increased by bringing the tip of support screw 25 attached to sheath tube portion 221 into contact with the side of shaft portion 212, thereby transmitting force between metals.

[0087] Furthermore, if the vibration-damping material 23 is simply interposed between the sheath tube portion 221 and the shaft portion 212, residual displacement occurs due to contact and separation, but by connecting the sheath tube portion 221 and the shaft portion 212 via the support screw 25, it becomes possible to suppress the occurrence of residual displacement.

[0088] Next, the operation of the sound-insulating earthquake-resistant reinforcing metal fitting and the suspended ceiling structure 1 of this embodiment will be described. The sound-insulating earthquake-resistant reinforcing metal fitting of this embodiment configured as described above reinforces the suspended ceiling structure at the intersection 17A between the soffit receiving portion 14 and the soffit portion 15 having the lip portion 151.

[0089] In this sound-insulating earthquake-resistant reinforcement metal fitting, a first metal fitting 4 fixed to the soffit receiving portion 14 is straddled by a second metal fitting 5 fixed to the soffit portion 15, and the two metal fittings are joined together with two screws 31 that serve as a uniting means. The second metal fitting 5 has a limiting rib portion 514 that projects from the lip side plate portion 51 of a pair of plate portions (51, 52) that face each other across the lip portion 151 of the soffit portion 15, and this limiting rib portion 514 limits the rotation of the washer portion 55 of the bolt portion 54.

[0090] In other words, without this limiting rib portion 514, the washer portion 55 would rotate together with the bolt portion 54 when it is tightened, and the entire surface of the washer portion 55 would not be able to contact the lip portion side plate portion 51. If the contact area between the two is reduced, the fastening force introduced from the bolt portion 54 will decrease accordingly, and there is a risk that the force that crushes the lip portion 151, in other words, the force (degree of fixation) with which the second fitting 5 is fixed to the edge portion 15, will decrease.

[0091] On the other hand, if washer portion 55 is positioned in the correct orientation so that the entire surface of washer portion 55 is in contact with lip portion side plate portion 51, the fastening force of bolt portion 54 is introduced at the desired magnitude as designed, and lip portion 151 can be crushed within the designed range. Here, the hole through which bolt portion 54 is passed in lip portion side plate portion 51 can be provided with an internal thread groove to increase the joining strength between bolt portion 54 and lip portion side plate portion 51. Furthermore, even if it is simply an insertion hole, the desired design force can be introduced as long as washer portion 55 is positioned in the correct orientation.

[0092] Furthermore, if the limiting ribs 514 that limit the rotation of the washer 55 protrude from both side edges of the lip side plate 51, the rigidity against bending of the lip side plate 51 itself can be increased. As a result, the suspended ceiling structure 1 can have high rigidity and earthquake resistance.

[0093] Furthermore, the sound-insulating fitting 2 attached to the upper surface of the second fitting 5 is configured so that the periphery of the columnar shaft portion 212 is covered with a sheath tube portion 221, with vibration-damping material 23 interposed between the shaft portion 212 and the sheath tube portion 221. The sheath tube portion 221 is also provided with a plurality of mounting pieces 222 for connecting the ends of the brace 8.

[0094] In this manner, if the shaft portion 212 fixed to the soffit support portion 14 is surrounded by the sheath tube portion 221 to which the lower end of the brace 8 is connected via the vibration-damping material 23, the brace 8 does not bear the weight of the ceiling board 16, and the sound-proofing performance of the vibration-damping hanger 7 of the hanging bolt 13 can be fully demonstrated.

[0095] In other words, when there is no earthquake, it is possible to insulate vibration transmission between the joist support 14 and the braces 8. Also, by placing sound-insulating metal fittings 2 at a location where braces 8 are gathered from four directions, for example, it is possible to provide sound insulation for all four braces 8 with a single fitting.

[0096] Furthermore, during an earthquake, the force from the braces 8 is transmitted to the intersections 17A via the sound-insulating metal fittings 2 and the earthquake-resistant reinforcing metal fittings 3, and then transmitted to the ceiling panels 16. In short, if the lower ends of the braces 8, which are arranged in a roughly V-shape when viewed from the side, are connected to the earthquake-resistant reinforcing metal fittings 3, the force is transmitted from the earthquake-resistant reinforcing metal fittings 3 in the axial direction (material axis direction) of the rough edge 15 directly below, and is transmitted to the ceiling panels 16 at the positions of the fastening screws 161 that join the rough edge 15 and the ceiling panels 16, thereby effectively transmitting the axial force.

[0097] Furthermore, if the suspended ceiling structure 1 is one in which the lower ends of the braces 8 arranged in a roughly V-shape when viewed from the side are attached to sound-insulating earthquake-resistant reinforcement fittings made up of sound-insulating fittings 2 and earthquake-resistant reinforcement fittings 3, earthquake resistance and sound insulation can be efficiently improved. In particular, if the lower ends of the braces 8 arranged in a roughly V-shape when viewed from the side in two directions are attached together to the sound-insulating earthquake-resistant reinforcement fittings, the earthquake-resistant reinforcement structure can be constructed efficiently with good workability. [Example]

[0098] Below, other embodiments of sound-insulating earthquake-resistant reinforcement metal fittings than those of the above-described embodiment will be explained with reference to Figures 14 to 20. Note that the same or equivalent parts as those described in the above embodiment will be explained using the same terms or symbols.

[0099] The sound-insulating earthquake-resistant reinforcement metal fitting of Example 1 is composed of an earthquake-resistant reinforcement metal fitting 3A and a sound-insulating metal fitting 2A. Here, the structure of the earthquake-resistant reinforcement metal fitting 3A is mostly the same as that of the earthquake-resistant reinforcement metal fitting 3 described in the previous embodiment, so only the differences will be described.

[0100] 14 is a perspective view illustrating lip side plate 51A of second fitting 5A of earthquake-resistant reinforcement fitting 3A. Stage portion 53A of this lip side plate 51A is drilled with through-hole 516, which is rectangular in plan view and penetrates vertically on the edge side adjacent to recess 532A. This through-hole 516 is a hole for passing protrusion 215, which will be described later, and is also provided on the stage portion 53B side.

[0101] On the other hand, as shown in Figures 15, 16, and 18, the sound-insulating metal fittings 2A are mainly composed of an inner member 21A fixed to the earthquake-resistant reinforcement metal fittings 3A, an outer member 22A to which the ends of the braces 8 are connected, and vibration-damping material 23 which serves as a sound-insulating functional part interposed between the inner member 21A and the outer member 22A.

[0102] 15, the inner member 21A includes a flat plate portion 211 that is rectangular in plan view, such as a square, and a columnar shaft portion 212A that protrudes upward from the center of the flat plate portion 211. The shaft portion 212A is formed, for example, from a rectangular steel pipe having a rectangular cylindrical shape, and has a length shorter than that of the shaft portion 212 described in the above embodiment. In addition, the shaft portion 212A is firmly joined to the flat plate portion 211 and the upper cover portion 213 by a welded portion 216.

[0103] Meanwhile, a pair of protrusions 215, 215 are provided on the edge of the flat plate portion 211, sandwiching the shaft portion 212A therebetween. The protrusions 215 are formed by cutting a part of the flat plate portion 211 into a U-shape in plan view and bending it vertically downward, thereby protruding (see FIG. 15(b)).

[0104] The outer member 22A is formed in a cylindrical shape surrounding the shaft portion 212A of the inner member 21A and the vibration-damping material 23, and is mainly composed of a square cylindrical sheath tube portion 221A and multiple mounting pieces 222A for attaching the lower end of the brace 8, as shown in Figure 16.

[0105] 18 and 19, the sheath pipe portion 221A is made of a square steel pipe and is shorter than the shaft portion 212A. That is, the shaft portion 212A is formed to be longer than the sheath pipe portion 221A.

[0106] Meanwhile, as shown in Fig. 16, the side edges of the four mounting pieces 222A extending horizontally from the corners of the sheath pipe portion 221A of the outer member 22A are provided with protruding pieces 225 having portions that protrude downward from the lower end surface of the sheath pipe portion 221A. That is, as shown in Fig. 19, when the upper surface of the flat plate portion 211 before the brace 8 is attached to the sheath pipe portion 221A is brought into contact with the lower end surface of the sheath pipe portion 221A, the lower edges of the protruding pieces 225 are provided so as to protrude downward from the flat plate portion 211. Here, the side edges of the mounting pieces 222A are firmly joined to the corners of the sheath pipe portion 221A by welds 217, as shown in Fig. 16(b).

[0107] By configuring the mounting piece 222A in this manner, even if a clockwise or counterclockwise rotational force is applied when viewed from above (see Figure 17) or from above (see Figure 19), the protruding piece portion 225 can come into contact with the side end surface of the flat plate portion 211 to prevent rotation.

[0108] As described above, when connecting brace 8, a force acts on outer member 22A, which is provided with mounting pieces 222A, to cause it to rotate as a rigid body, but the fit of these multiple protruding pieces 225 with flat plate portion 211 provides resistance, allowing the lower end of brace 8 to be connected in a stable state. On the other hand, these protruding pieces 225 do not prevent seismic reinforcing bracket 3A from sinking when ceiling panel 16 is attached after brace 8 is installed, and sheath pipe portion 221A and flat plate portion 211 are not in contact with each other, as shown in Figure 18.

[0109] 20, the protrusions 215 that protrude downward from the stage portions 53A, 53B are positioned so that their sides come into contact with the ribs 44 of the first fitting 4. By positioning the protrusions 215 and ribs 44 in this way, when a force (see FIG. 12) is applied such that an axial force input from one brace 8 is output from the other brace 8, causing the sound-insulating fitting 2A to rotate clockwise as shown in FIG. 20(a), the side of the protrusions 215 comes into contact with the ribs 44, preventing the rotation. In other words, the contact between the ribs 44 of the first fitting 4 fixed to the siding support part 14 and the protrusions 215 provides resistance to rotation along the axial direction of the siding support part 14.

[0110] In addition, the horizontal force Q acting during an earthquake (see Figure 12) generates a rocking moment M R Even if rocking is about to be induced, the protruding piece 225 of the mounting piece 222A comes into contact with the stage parts 53A, 53B of the earthquake-resistant reinforcement bracket 3A at an early stage, allowing the compression side brace 8 (see the brace 8 on the right side in Figure 12) to directly suppress the rocking. The other configurations and effects are substantially the same as those of the above-described embodiment or other examples, and therefore the description thereof will be omitted. [Example]

[0111] 21 to 23, a description will be given of another embodiment of the sound-insulating earthquake-resistant reinforcement metal fitting that is different from the embodiment and example 1 described above. Note that the same terms or the same reference numerals will be used to describe parts that are the same as or equivalent to those described in the embodiment or example 1.

[0112] The sound-insulating earthquake-resistant reinforcement metal fitting of Example 2 is a hybrid of the two types of sound-insulating earthquake-resistant reinforcement metal fittings described in the above embodiment and Example 1. In other words, the sound-insulating earthquake-resistant reinforcement metal fitting of Example 2 is equipped with sound-insulating metal fitting 2B, which combines the characteristic configurations of the two types of sound-insulating metal fittings 2 and 2A.

[0113] Figure 21 is a plan view for explaining the configuration of the sound-insulating earthquake-resistant reinforcement bracket of Example 2, Figure 22 is a cross-sectional view taken along the EE arrow direction in Figure 21, and Figure 23 is a cross-sectional view taken along the FF arrow direction in Figure 21.

[0114] The sound-insulating metal fittings 2B are mainly composed of an inner member 21B fixed to the earthquake-resistant reinforcement metal fittings 3A, an outer member 22B to which the ends of the braces 8 are connected, and vibration-damping material 23 which serves as a sound-insulating functional part interposed between the inner member 21B and the outer member 22B.

[0115] The inner member 21B includes a flat plate portion 211 that is rectangular in plan view, such as a square, and a columnar shaft portion 212 that protrudes upward from the center of the flat plate portion 211. The shaft portion 212 and the vibration-proof material 23 have the same configuration as those described in the above embodiment, so detailed description will be omitted. In addition, a pair of protrusions 215, 215 are provided on the edge of the flat plate portion 211, sandwiching the shaft portion 212 therebetween.

[0116] The outer member 22B is formed in a cylindrical shape surrounding the shaft portion 212 of the inner member 21B and the vibration-damping material 23, and is mainly composed of a square cylindrical sheath tube portion 221 and multiple mounting pieces 222A for attaching the lower end of the brace 8.

[0117] That is, sheath tube portion 221 constituting outer member 22B has the same configuration as that described in the above embodiment, and mounting piece 222A has the same configuration as that described in above Example 1. In short, a protruding piece portion 225 having a portion that protrudes downward from the lower end surface of sheath tube portion 221 is provided on the side edge of mounting piece 222A of outer member 22B.

[0118] In the sound-insulating earthquake-resistant reinforcement fitting of Example 2 configured in this manner, the tip of the support screw 25 attached to the sheath tube portion 221 is brought into contact with the side of the shaft portion 212 so that force is transmitted between the metals, thereby increasing the rigidity of the sound-insulating fitting 2B.

[0119] In addition, by bringing the tip of the support screw 25 screwed into the screw hole 224 at the top of the height direction of the sheath pipe portion 221 into contact with the side surface of the shaft portion 212, a rocking moment M along the axial direction of the edge portion 15 is generated. R It is possible to ensure resistance that can offset the above.

[0120] Furthermore, by bringing the side of the protrusion 215 into contact with the rib 44 of the first fitting 4, it is possible to prevent rotation of the sill support portion 14 of the sound-insulating fitting 2B in the axial direction. Furthermore, the protrusion 225 of the mounting piece 222A comes into contact with the stage portions 53A, 53B of the earthquake-resistant reinforcement fitting 3A at an early stage, causing the compression-side brace 8 to take effect immediately, thereby suppressing rocking. The other configurations and effects are substantially the same as those of the above-described embodiment or other examples, and therefore the description thereof will be omitted.

[0121] The embodiments and examples of the present invention have been described in detail above with reference to the drawings. However, the specific configurations are not limited to these embodiments or examples, and design changes that do not deviate from the gist of the present invention are included in the present invention.

[0122] For example, in the above-described embodiment and example, a configuration has been described in which the rectangular parallelepiped shaft portion 212, 212A is surrounded by the rectangular cylindrical sheath tube portion 221, 221A, but this is not limited to this, and the configuration may also be such that the cylindrical or polygonal prism-shaped shaft portion is surrounded by a cylindrical or polygonal tubular sheath tube portion.

[0123] Furthermore, in the above-described embodiment and examples, the braces 8 are arranged in a V-shape, but this is not limited to this, and the configuration may also be such that a brace that forms a single diagonal member or braces arranged in an X-shape are connected.

[0124] Furthermore, in the above-described embodiments and examples, mounting pieces 222, 222A for connecting the ends of the braces 8 are provided at the corners of the sheath pipe portions 221, 221A, but this is not limited to this, and the side edges of the mounting pieces can also be fixed to the side surfaces of the sheath pipe portions.

[0125] Furthermore, in the above-described embodiments and examples, a configuration has been described in which vibration-damping material 23 is interposed between the outer peripheral surface of shaft portion 212, 212A and the inner peripheral surface of sheath tube portion 221, 221A, but this is not limited to this, and there may simply be a gap between the outer peripheral surface of the shaft portion and the inner peripheral surface of the sheath tube portion. [Explanation of symbols]

[0126] 1: Suspended ceiling structure 11: Floor slab (structure) 14: Rafter support 15: Noenbe 151: Lip part 17A: Intersection 2, 2A, 2B: Sound-insulating metal fittings 21,21A,21B: Internal material 211: Flat plate part 212, 212A: Shaft section 215:Protrusion 22,22A,22B: External material 221, 221A: sheath tube 222, 222A: Mounting piece 225:Protruding piece 23: Vibration isolating material 25: Support screw (screw component) 3, 3A: Earthquake-resistant reinforcement metal fittings 31: Screw material (integration means) 4: First metal fitting 41: Bending part 42: Notch 43: Screw material 44: Rib 5,5A: Second metal fitting 51, 51A: Lip side plate (plate) 512: Hook 514: Restriction rib part 52: Stop plate (plate) 53A, 53B: Stage section 54: Bolt section 55: Washer part 8: Brace (diagonal member)

Claims

1. A sound-insulating earthquake-resistant reinforcing metal fitting having a sound-insulating function that reinforces a suspended ceiling structure having a rafter receiving portion and a rafter portion suspended from a structure via a suspension bolt equipped with an anti-vibration hanger at the intersection between the rafter receiving portion and the rafter portion having a lip portion, A first metal fitting fixed to the sill receiving portion disposed above; A second metal fitting that is fixed to the edge portion by straddling the first metal fitting; an integration means for joining the first fitting and the second fitting; a sound-insulating metal fitting attached to an upper surface of the second metal fitting, The first metal fitting has a bent portion that straddles the siding receiving portion, a notch portion formed in the lower portion so that the siding can be fitted, and a joining means for fixing it to the siding receiving portion, The second metal fitting has plate portions that face each other across the lip portion of the edge portion, a hook portion provided on the lower part of the plate portion on the lip portion side, a bolt portion that introduces a fastening force between the plate portions when the hook portion is hooked onto the lip portion, a washer portion of the bolt portion, and a limiting rib portion that protrudes from one of the plate portions to limit rotation of the washer portion, The sound-insulating metal fitting comprises an inner member fixed to the second metal fitting and having a columnar shaft portion formed therein, an outer member having a plurality of mounting pieces for connecting the lower ends of the diagonal members and having a sheath tube portion surrounding the periphery of the shaft portion formed therein, and a vibration-damping material interposed between the shaft portion and the sheath tube portion; The upper end of the diagonal member is fixed to the top of the hanging bolt, and as the weight of the ceiling panel attached to the rough edge is borne by the hanging bolt equipped with the vibration-damping hanger, which has an overall axial rigidity higher than the axial rigidity of the vibration-damping material, the inner member sinks more than the outer member.

2. The shaft portion is formed to be longer than the sheath tube portion, The sound-insulating earthquake-resistant reinforcement bracket described in claim 1, characterized in that a screw member is provided at the upper part of each side of the sheath pipe portion that sandwiches the shaft portion, so that the tip of the screw member contacts the side of the shaft portion.

3. The shaft portion is formed at the center of the flat plate portion, A protruding piece portion is provided on a side edge of the attachment piece extending horizontally from the sheath tube portion, and protrudes downward from the flat plate portion when the upper surface of the flat plate portion and the lower end surface of the sheath tube portion come into contact with each other; The sound-insulating earthquake-resistant reinforcement bracket according to claim 1, characterized in that the first bracket is provided with a rib that can be contacted by the side of a protrusion that protrudes from the flat plate portion toward the first bracket.

4. The shaft portion is formed at the center of the flat plate portion so as to be longer than the sheath tube portion, A screw member is provided at the upper part of each side surface of the sheath tube portion sandwiching the shaft portion, and the tip of the screw member contacts the side surface of the shaft portion; a protruding piece portion that protrudes downward when a lower end surface of the sheath pipe portion and an upper surface of the flat plate portion come into contact with each other is provided on a side edge of the attachment piece that extends horizontally from the sheath pipe portion, The sound-insulating earthquake-resistant reinforcement bracket according to claim 1, characterized in that the first bracket is provided with a rib that can be contacted by the side of a protrusion that protrudes from the flat plate portion toward the first bracket.

5. The second fitting has a stage portion that extends in the opposite direction from the upper edge of each of the plate portions while contacting the upper end surface of the sill receiving portion to form a flat surface, 5. The sound-insulating earthquake-resistant reinforcing metal fitting according to claim 1, wherein the sound-insulating metal fitting is attached by fixing the inner member to the stage portion.

6. A suspended ceiling structure having a rafter support and a rafter suspended from a structural body via a suspension bolt equipped with an anti-vibration hanger is reinforced and a sound-insulating function is added. The sound-insulating earthquake-resistant reinforcement bracket according to any one of claims 1 to 5, attached to the intersection of the soffit receiving portion and the soffit portion having a lip portion; and a diagonal member arranged in a substantially V-shape in a side view along the axial direction of at least one of the furring strip receiving portion and the furring strip. An earthquake-resistant reinforcement structure for a suspended ceiling, characterized in that the upper end of the diagonal member is fixed to the upper part of the hanging bolt, and the lower end of the diagonal member is connected to the mounting piece of the sound-insulating metal fitting.

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