JP7601347B2 - Suspended ceiling structure - Google Patents

Description

The present invention relates to a reinforcing bracket that is attached to the intersection of a soffit support portion and a soffit of a suspended ceiling structure that has a soffit support portion and a soffit suspended from a structural body such as a building, and to the suspended ceiling structure to which it is attached.

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

In the suspended ceiling structures disclosed in these documents, earthquake-resistant braces are placed inside the ceiling. In detail, the lower ends of the four diagonally placed braces are connected to a single earthquake-resistant reinforcement bracket that is attached to the intersection between the soffit support and the soffit.

By using these types of seismic reinforcement fittings, the load on the brace is transferred directly to the rafters directly below, allowing the force to be efficiently distributed to the ceiling panels via the rafters.

Patent No. 4963484 Patent No. 4845212 Patent No. 6290167 JP 2009-2435 A

However, in some cases, braces cannot be placed inside a suspended ceiling due to space restrictions, and other forms of reinforcing material may be installed. Also, as disclosed in Patent Document 4, vibration-proofing materials may be 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.

The present invention aims to provide a reinforcing bracket that can reinforce the intersection between the siding support and the siding, and also allows various components to be easily attached, as well as a suspended ceiling structure to which the bracket is attached.

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 structure, and is provided with a first metal fitting that is fixed to the soffit receiving portion located above, and a second metal fitting that is straddled over the first metal fitting and fixed to the soffit portion, the first metal fitting having a bent portion that straddles 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 metal 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.

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 portion suspended from a structure, and is equipped with the above-mentioned reinforcing metal fitting attached to the intersection of the soffit receiving portion and the soffit portion having a lip portion, and a vertical member the upper portion of which is fixed to the structure, and the lower portion of the vertical member is connected to the stage portion of the reinforcing metal fitting. Here, a soundproofing portion can be provided on the lower end surface of the vertical member.

Furthermore, another invention of a suspended ceiling structure is a suspended ceiling structure having a soffit receiving portion and a soffit portion suspended from a structural body, and is characterized in that it comprises the above-mentioned reinforcing metal fitting attached to the intersection of the soffit receiving portion and the soffit portion having a lip portion, and a diagonal member arranged in a roughly V-shape in side view along the axial direction of at least one of the soffit receiving portion and the soffit portion, and the lower part of the diagonal member is connected to the stage portion of the reinforcing metal fitting via a soundproofing portion.

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

This not only reinforces the intersections between the soffit receiving parts, but also makes it easy to attach various components to the stage part, which is formed on a flat surface. Because this stage part is in contact with the upper end surface of the soffit receiving part, even if a load acts from above, it can be supported by the reaction force of the soffit receiving part.

The stage section, which extends across a flat surface, is also drilled with mounting holes that penetrate vertically, allowing various attachments to be easily attached using fastening means such as bolts and screws.

If the suspended ceiling structure has a vertical member whose upper part is fixed to a structural body such as a beam and whose lower part is attached to the reinforcing metal fittings, the force transmitted from the structural body through the vertical member can be transmitted straight to the edging and ceiling boards 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, making it possible to create a connection with soundproofing functions.

In addition, if the suspended ceiling structure has the lower parts of the diagonal members arranged in a roughly V-shape when viewed from the side connected to the stage section via a soundproofing section, the soundproofing section can be placed where the lower parts of the diagonal members are concentrated, ensuring soundproofing function even with a reduced number of parts.

1 is a perspective view for explaining the configuration of a suspended ceiling structure of the present embodiment. FIG. FIG. 2 is an exploded perspective view for explaining the configuration of the reinforcing metal fitting according to the present embodiment. FIG. 2 is a perspective view for explaining the configuration of a reinforcing metal fitting according to the present embodiment. FIG. 13 is a perspective view illustrating a state in which a reinforcing metal fitting is attached to an intersection portion. 11 is an explanatory diagram showing the configuration of an attachment to be attached to a reinforcing metal fitting. FIG. 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. 13 is a perspective view showing the angle iron attached to the reinforcing metal fitting from a different angle. FIG. FIG. 11 is a perspective view for explaining the state in which a square pipe material is attached to the reinforcing metal fitting of Example 2. FIG. 11 is a perspective view for explaining the configuration of a suspended ceiling structure of the third embodiment. 13 is a plan view for explaining the state in which a sound-proofing portion is attached to the reinforcing metal fitting of the third embodiment. FIG. 11 is a cross-sectional view taken along the line AA in FIG. 10. 11 is a cross-sectional view taken along the line BB of FIG. 10.

The following describes an embodiment of the present invention with reference to the drawings. Figure 1 is a diagram for explaining the configuration of a suspended ceiling structure 1 in this embodiment. Also, Figures 2 to 4 are diagrams for explaining the configuration of a reinforcing bracket 3 in this embodiment.

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, and buildings. The suspended ceiling structure 1 of this embodiment can be applied to both existing suspended ceilings and newly constructed suspended ceilings.

As shown in FIG. 1, multiple suspension bolts 13 are hung at intervals from the underside of the floor slab 11 and beams 12 that form the structural body of the building, and the siding support parts 14 are hung from hangers 131 at the lower ends of the suspension bolts 13.

Furthermore, the furring strips 15 are attached at intervals in the axial direction of the furring strip receiving portion 14, facing in a direction substantially perpendicular to the axial direction. Furthermore, a ceiling board 16 such as a gypsum board is attached to the underside of the furring strip 15.

In the suspended ceiling structure 1 of this embodiment, at the intersections 17A, 17B between the siding support 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 braces cannot be placed inside the suspended ceiling due to space restrictions, the beam 2, which acts as a reinforcing material, is placed.

The reinforcing metal fitting 3 is attached to the intersection 17A between the sill receiving portion 14 and the sill portion 15, as shown in Figures 2-4. The lower part of the bundle 2 is then attached to this reinforcing metal fitting 3 in a form such as that exemplified in the examples below.

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

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. In other words, the furring strip 15 can be made of a steel material having a roughly U-shaped cross section and lip portions 151, 151. The lip portion 151 is formed by the upper surface and the hanging surface into a roughly L-shaped cross section facing horizontally.

The reinforcing metal fitting 3 is mainly composed of a first metal fitting 4 that is fixed to the sill receiving portion 14 located above, and a second metal fitting 5 that is fixed to the sill portion 15 across the first metal fitting 4, as shown in Figures 2 to 4.

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 notch portion 42 formed in the lower portion so that the sill portion 15 can be fitted, and a screw material 43 as a joining means for fixing the first metal fitting 4 to the sill receiving portion 14.

As shown in FIG. 2, the bent portion 41 is formed in a generally gate-shaped cross section so as to cover the soffit 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 web 143 of the soffit receiving portion 14.

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

The bent portion 41 thus formed 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, so that the first metal fitting 4 is placed on the upper end of the side wall portions 152, 152.

In addition, on both sides of the bent portion 41, screws 43, 43 are continuously inserted through the web 143 of the siding support portion 14 and the first metal fitting 4 to join them together. As a result, the first metal fitting 4 is fixed to the siding support portion 14.

In this way, by using the screw material 43 that penetrates both of the furring strip receiving portion 14 as the joining means for fixing the first metal fitting 4 to the furring strip receiving portion 14, a strong joint can be achieved by the shear resistance of the screw material 43. In short, 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 joint can be achieved that does not cause misalignment 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, movement of the first metal fitting 4 in any direction other than the axial direction of the furring strip portion 15 is restricted.

Furthermore, ribs 44, 44 protrude from both axial edges of the sill receiving portion 14 of the first fitting 4 in a direction that is approximately 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.

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

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

Stage sections 53A and 53B are provided on the pair of plate sections (51, 52) in opposite directions from the upper edges of each plate section, and extend in contact with the upper flange 141 that forms the upper end surface of the sill support section 14 to form a flat surface. Here, the flat surface provided on the lip side plate section 51 is referred to as stage section 53A, and the flat surface provided on the stop plate section 52 is referred to as stage section 53B.

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

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

The pair of stages 53A, 53B form a wide rectangular plane extending from the upper flange 141, and mounting holes 531 are drilled in the vertical direction, for example near the corners. In this embodiment, an example is described in which four mounting holes 531 are provided at each corner.

In addition, 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 as shown in Figures 2 and 3. 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 sides of a rectangle and tilting it towards the lip portion 151 (see Figure 11).

As shown in Figures 2 to 4, an insertion hole 513 is drilled above the hook portion 512, and the 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 stop plate portion 52, and a nut 541 is attached to the tip that protrudes toward the stop plate portion 52 (see Figure 6).

On the other hand, a washer portion 55 made of a rectangular (approximately square) steel plate or the like is disposed on the head side of the bolt portion 54 as shown in FIG. 4. In other words, the fastening force introduced between the lip side plate portion 51 and the retaining plate portion 52 by tightening the bolt portion 54 is transmitted through the contact surface between the washer portion 55 and the lip side plate portion 51.

Here, in order to limit the rotation of this washer portion 55, the rib portion 514 is protruded from the side edge of the lip side plate portion 51. In detail, rib portions 514, 514 protrude from both axial edges of the furring portion 15 of the lip side plate portion 51 in a direction approximately parallel to the axial direction of the furring receiving portion 14. These 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.

Furthermore, as shown in FIG. 4, the ribs 522, 522 can be extended 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 receiving portion 14 to increase rigidity.

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.

The second fitting 5 is crimped by the applied fastening force and the deformed lip 151, and the axial movement of the furring edge 15 is restricted. The lip side plate 51 and the stop plate 52, which are formed in a gate shape and span the first fitting 4 and the furring edge support 14, also restrict the axial movement of the furring edge 15 of the second fitting 5.

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

For example, a joint piece is protruded from the lip side plate portion 51 at a substantially right angle and placed along the outer surface of the bent portion 41 of the first fitting 4, and a screw is screwed in as an integration means for joining the first fitting 4 and the second fitting 5. In particular, by using multiple screws as an 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.

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 attaching this reinforcing metal fitting 3 increases the joint strength of the intersection 17A and reinforces it.

On the other hand, as shown in FIG. 1, reinforcing clips 6 and clips 61 are attached to intersections 17B other than intersection 17A where reinforcing bracket 3 is attached. Reinforcing clips 6 can connect siding support portion 14 and siding portion 15 more firmly than normal clips 61 attached to intersections 17B between siding support portion 14 and siding portion 15 where reinforcing bracket 3 is not attached.

Then, the attachment 7 for fixing the lower end of the bundle 2 and the like is attached to the stage parts 53A and 53B of the reinforcing metal fitting 3 attached to the intersection part 17A. Figure 5 shows an example of the attachment 7 to be attached to the reinforcing metal fitting 3.

Figure 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.

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 have a female thread groove, the attachment 7 can be fixed by the bolt 73 screwed in from above without using a nut.

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

As shown in FIG. 5, holes 721 can be drilled in the side 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.

Next, the operation of the reinforcing bracket 3 and the suspended ceiling structure 1 of this embodiment will be described.
The reinforcing bracket 3 of this 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.

In this reinforcing bracket 3, the first bracket 4, which is fixed to the sill receiving portion 14, is straddled by the second bracket 5, which is fixed to the sill portion 15. At this time, if the washer portion 55 is positioned in the correct orientation 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.

By attaching the attachment 7 to the stage parts 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 if it is not possible to arrange a brace.

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

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

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

The intersection 17A between the siding support 14 and the siding 15 can be reinforced by attaching a reinforcing bracket 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.

Furthermore, not only the bundle material 2 but also various other components can be easily attached to the stage sections 53A and 53B formed on a flat surface, as described later in the examples. That is, the stage sections 53A and 53B, which extend on a flat surface, are provided with mounting holes 531 that penetrate in the vertical direction, so various attachments can be easily attached using fastening means such as bolts and screws.

The following describes an example of how the reinforcing bracket 3 of the embodiment described above can be used, with reference to Figures 6 and 7. Note that the same terms or symbols are used to describe parts that are the same or equivalent to those described in the embodiment described above.

In this Example 1, we will explain the use of angle iron 2A as a specific example of a beam 2, which is a vertical member. The angle iron 2A is formed of an angle iron that is roughly L-shaped in cross section. The upper part of one of the two orthogonal side surfaces is fixed in contact with the side surface of the beam 12.

The angle bar 2A has holes 22 drilled in the upper and lower sides. The two inner surfaces of the lower part of the angle bar 2A are brought into contact with the two orthogonal outer surfaces of the central protrusion 72 of the attachment 7, as shown in FIG. 6.

As shown in FIG. 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.

In this way, the lower part of the angle bar 2A can be easily attached to the attachment 7 fixed to the stage parts 53A and 53B of the reinforcing bracket 3 with the bolts 73 using the fixing bolts 74.

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 in place.

In this manner, the angle member 2A can be easily attached to the reinforcing metal fitting 3 attached to the intersection portion 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.

As in the above-mentioned Example 1, an example of the use of the reinforcing metal fitting 3 will be described below with reference to FIG. 8. Note that the same or equivalent parts as those described in the above-mentioned embodiment or Example 1 will be described with the same terms or symbols.

In this second embodiment, we will explain the use of square pipe material 2B as a specific example of the beam material 2, which is a vertical member. The square pipe material 2B is formed from a rectangular steel pipe. The upper part of one of the four sides is fixed in contact with the side of the beam 12.

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

Fixing using the hole 22 at the bottom of the square pipe material 2B can be done by screwing the fixing bolt 74 into the hole 721 of the central protrusion 72 as described in the above Example 1, but it can also be done by fixing to the central protrusion 72 where the hole 721 is not drilled.

For example, a female thread 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 in the fixing bolt 74 from the four sides of the square pipe material 2B, it becomes easy to adjust the inclination of the square pipe material 2B and its planar position on the flat plate portion 71.

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.

In addition, by inserting anti-vibration rubber or the like into the gap between the lower end surface of the raised square pipe material 2B and the flat plate portion 71, a connection with sound insulation function via a sound insulation portion as described later in Example 3 can be achieved.

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 it to the side of the beam 12.
Even such a highly rigid square pipe material 2B can be easily attached to the reinforcing metal fitting 3 via the attachment 7, thereby connecting the intersection 17A and the beam 12.
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.

Below, a suspended ceiling structure 1A of an embodiment different from the embodiment and Examples 1 and 2 described above will be described with reference to Figures 9 to 12. Note that parts that are the same or equivalent to those described in the embodiment or Examples 1 and 2 described above will be described using the same terms or symbols.

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 anti-vibration hangers 94 is reinforced against earthquakes by arranging diagonal members such as braces in a manner that does not impair sound insulation. Here, anti-vibration hangers 94 are anti-vibration members that are attached midway along the hanging bolts 13 and designed to provide sufficient sound insulation when the weight of the ceiling panel 16 is acting on them, as described in JP 2009-2435 A.

The suspended ceiling structure 1A is provided with braces 8, 8 as a pair of diagonal members in the furring support direction arranged in a roughly V-shape in side view along the axial direction of the furring support portion 14, and braces 8, 8 as a pair of diagonal members in the furring support direction arranged in a roughly V-shape in side view along the axial direction of the furring portion 15.

The upper end of the brace 8 is fixed to the top of the hanging bolt 13 via a mounting bracket 81. Meanwhile, a reinforcing bracket 3 is attached to the intersection 17C between the sill support portion 14 and the sill portion 15. The lower end of the brace 8 is then attached to this reinforcing bracket 3.

In detail, as shown in FIG. 10, an attachment 7A is attached to the reinforcing bracket 3, and the lower end of the brace 8 is attached via a sound-proofing part 9, which acts as a vibration-proofing member, attached to the attachment 7A.

This soundproofing part 9 is attached to the central protrusion 72A of the attachment 7A as shown in Figures 10-12. This 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. In other words, as shown in Figure 10, the corners of the central protrusion 72A are positioned to face the axial direction of the sill receiving part 14 and the sill part 15.

The sound insulation section 9 is mainly composed of a rectangular cylindrical sheath tube 91 that surrounds the outer periphery of the central protrusion 72A, a vibration-proof rubber 92 that is placed in the gap between the central protrusion 72A and the sheath tube 91, and an attachment piece 93 for attaching the lower end of the brace 8.

The size of the sheath tube 91 is set according to the thickness of the anti-vibration rubber 92 that is placed between it. By placing the anti-vibration rubber 92 between the central protrusion 72A and the sheath tube 91, it is possible to suppress the transmission of micro-vibrations 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 protrusion 72A and the sheath tube 91 may simply be a gap.

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

The mounting pieces 93 extend from each corner of the sheath tube 91 in the axial direction of the sill receiving portion 14 and the sill portion 15. Then, as shown in Figures 11 and 12, the arm material 82 is attached diagonally to the mounting pieces 93 extending in the axial direction by bolts 821.

The lower ends of the braces 8 are joined to the arm material 82. The arm material 82 is formed in a roughly L-shape in cross section in order to attach the lower ends of the braces 8. In this way, the lower ends of the four braces 8 arranged in roughly a V-shape in side view in two directions can be attached together at one soundproofing section 9.

The soundproofing portion 9 is then connected to the reinforcing bracket 3 via the attachment 7A. In this way, by providing the soundproofing portion 9 on the reinforcing bracket 3 attached to the intersection 17C between the siding support portion 14 and the siding portion 15, 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 interposed between 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 more rational.

In the suspended ceiling structure 1A of Example 3 configured in this manner, the brace 8 is connected to the intersection 17C via the reinforcing metal fittings 3, so it has high earthquake resistance, and since the sound-proofing section 9 is interposed before the force from the brace 8 is transmitted to the ceiling panel 16, sound-proofing function can be ensured.

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.

The above describes the embodiment and examples of the present invention in detail with reference to the drawings, but 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.

For example, in the above embodiment and example, a case was described in which a brace 8 with a bundle material (2, 2A, 2B) and a sound-insulating part 9 was connected to the stage parts 53A and 53B of the reinforcing metal fitting 3 via an attachment 7, but this is not limited to this, and various attachments and members can be connected to the plane formed by the stage parts 53A and 53B of the reinforcing metal fitting 3.

In addition, in the above embodiment, the reinforcing brackets 3 are attached only to the intersections 17A where the bundles 2 are placed, but by attaching the reinforcing brackets 3 to the 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 if the shaking becomes very strong due to a major earthquake.

In short, by increasing the joint strength of the intersection between the siding support 14 and the siding 15 with the reinforcing metal fittings 3, it is possible to improve the effectiveness of preventing the ceiling from falling off. 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 loads.

1, 1A: Suspended ceiling structure 11: Floor slab (structure)
12: Beam (structural body)
14: Frame receiving portion 141: Upper flange (upper end surface)
15: Rough edge portion 151: Lip portion 17A, 17C: Intersection portion 2: Bundle material (vertical member)
2A: Angle material (vertical member)
2B: Square pipe material (vertical member)
3: Reinforcing metal fitting 4: First metal fitting 41: Bent portion 42: Notch portion 43: Screw material (jointing means)
5: Second metal fitting 51: Lip side plate portion (plate portion)
512: Hook portion 52: Stop plate portion (plate portion)
53A, 53B: Stage portion 531: Mounting hole 54: Bolt portion 8: Brace (diagonal member)
9: Soundproofing section

Claims (4)

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. The suspended ceiling structure according to claim 1 , wherein a sound insulating portion is provided on a lower end surface of the vertical member. 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. The suspended ceiling structure according to claim 1, wherein the stage portion has a mounting hole extending therethrough in the vertical direction.