Vibration-isolating hardware and vibration-isolating ceiling structure using same

Abstract

To provide vibration-isolating hardware capable of isolating and controlling vibrations of a ceiling on a lower floor.SOLUTION: A vibration-isolating hardware 1 connecting first and second structural members that intersect at right angles in a wooden building, includes: a first fixing member 11 fixed to the side of the first structural member; a second fixing member 12 fixed to the side of the second structural member; a viscoelastic body bonded to the first fixing member 11 and the second fixing member 12; and a vibration-isolating member located between the first fixing member 11 and the bottom surface of the second structural member. The first fixing member 11 includes: opposing side panels; a bottom panel connecting the lower ends of the side panels; and a first fixing portion standing perpendicularly outward or inward from the side edges of the opposing side panels and abutting against the side of the first structural member. The second fixing member 12 includes: a second fixing portion abutting against the side of the second structural member; and a joint portion positioned opposite the side panel of the first fixing member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to vibration-isolating hardware that connects structural members that intersect at right angles in wooden buildings and also damps vibrations, and to a vibration-isolating ceiling structure that uses the same. [Background technology]

[0002] BACKGROUND ART In floor structures of houses constructed using the wood-frame construction method, as disclosed in Patent Document 1, for example, ceiling joists independent from floor joists on upper floors are known as soundproofing measures. This structure supports the ceiling material on the lower floor by attaching it to the ceiling joists. Because the ceiling joists are independent of the floor joists, it is possible to suppress the transmission of vibrations caused by impact noise from the floor joists to the ceiling material on the lower floor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2017-25690 [Patent Document 2] Utility Model Registration No. 3193710 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, for wooden houses, a vibration damper using a viscoelastic material as described in Patent Document 2 is known. The applicant has now developed a vibration-damping hardware that uses a viscoelastic material and vibration-damping material, which can suppress the transmission of vibrations caused by impact noise from the floor above by isolating and damping the ceiling joists to which ceiling materials are attached.

[0005] The present invention aims to provide a vibration-proof metal fitting capable of preventing and controlling vibrations in the ceiling of a lower floor, and a vibration-proof ceiling structure using the same. [Means for solving the problem]

[0006] The vibration-damping hardware of the present application, which has been made to achieve the above object, is a vibration-damping hardware for connecting first and second structural members that are orthogonal to each other in a wooden building, and comprises a first fixing member fixed to the side of the first structural member, a second fixing member fixed to the side of the second structural member, a viscoelastic body bonded to the first fixing member and the second fixing member, and a vibration-damping member positioned between the first fixing member and the bottom surface of the second structural member, and the first fixing member comprises opposing side plates, a bottom plate connecting the lower ends of the side plates, and a vibration-damping member extending outward or inward from the side edges of the opposing side plates at a right angle. the second fixing member has a second fixing portion that abuts against the side surface of the second structural member and a joint portion that is positioned opposite the side plate of the first fixing member, the viscoelastic body bonds the side plate of the first fixing member to the joint portion of the second fixing member, the vibration-damping member is provided between the upper surface of the bottom plate of the first fixing member and the bottom surface of the second structural member, and the bottom plate of the first fixing member is provided with a drop prevention piece that stands upright from at least one of the sides perpendicular to the side plate. The side plate of the first fixing member may have a notch at a lower end of the end portion on the first fixing portion side. The second fixing member may have a step portion located between the second fixing portion and the joint portion, and the joint portion of the second fixing member may be positioned opposite the outer surface of the side plate of the first fixing member. The joint portion of the second fixing member may be disposed in contact with a side surface of the second structural member and facing an inner surface of the side plate of the first fixing member.

[0007] Furthermore, the vibration-proof ceiling structure of the present application, which has been made to achieve the above-mentioned object, comprises beams arranged opposite each other, floor joists fixed at both ends to the beams and arranged in parallel to support the floor material of the upper floor, and ceiling joists arranged between adjacent floor joists to support the ceiling material of the lower floor, and is characterized in that any of the vibration-proof metal fittings is arranged at both ends of the ceiling joists, with the first structural material being the beam and the second structural material being the ceiling joist, to connect the beams and the ceiling joists. Notches may be provided on the underside of both ends of the ceiling joist, and the underside of the notch of the ceiling joist may abut the upper surface of the vibration-damping member, connecting the ceiling joist to the beam via the vibration-damping hardware, and the underside of the ceiling joist other than the notch may be located below the underside of the bottom plate of the vibration-damping hardware. A plate-shaped support member may be disposed between the beam and the ceiling joist, and the vibration-proof hardware may be fixed to the beam via the support member. [Effects of the Invention]

[0008] The present invention can achieve at least one of the following effects by solving the above-mentioned problems. (1) The viscoelastic body deforms, and vibration can be damped together with the vibration-isolating member. (2) Vibration-proof metal fittings have two functions: connecting ceiling beams and floor joists, and also vibration-proofing and vibration-damping, so vibration-proof ceiling structures can be constructed inexpensively. (3) By erecting the anti-drop piece from the bottom plate, the descent of the ceiling joists can be prevented at the height of the anti-drop piece, thereby preventing damage to the ceiling material and equipment attached to the ceiling. (4) By lifting up multiple ceiling joists with support materials on both sides and fixing the support materials to the surface of the beams, multiple ceiling joists can be fixed to the beams together. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of the vibration-isolating hardware of the present invention in use; [Figure 2] An exploded perspective view of the vibration-isolating hardware of the present invention. [Figure 3] A perspective view of a first fixing member (1) [Figure 4] A perspective view (2) of the first fixing member [Figure 5] 1 is a perspective view of a second fixing member and a viscoelastic body; [Figure 6] Cross-sectional view of the vibration-isolating hardware of the present invention. [Figure 7] A perspective view of the vibration-proof ceiling structure of the present invention. [Figure 8] Plan view of the vibration-proof ceiling structure of the present invention [Figure 9] Explanatory diagram of the vibration-proof ceiling structure of the present invention (1) [Figure 10] Explanatory diagram of the vibration-proof ceiling structure of the present invention (2) [Figure 11] FIG. 10 is a perspective view of the vibration-isolating hardware of the present invention in use according to Example 2. [Figure 12] 1 is an exploded perspective view of a vibration-isolating hardware according to a second embodiment of the present invention. [Figure 13] 10 is a perspective view of a vibration-proof ceiling structure according to a third embodiment of the present invention. [Figure 14] Plan view of the vibration-proof ceiling structure of the present invention according to Example 3 DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described in detail below with reference to the drawings.

[0011] [Example 1] <1> Overview of vibration isolation hardware In this embodiment, the vibration-isolating hardware 1 of the present invention is used to connect a ceiling joist 3 to a beam 2 (FIG. 1). The vibration-proof hardware 1 consists of a first fixing member 11 fixed to the side of the beam 2, two second fixing members 12 fixed to both sides of the ceiling joist 3, and a viscoelastic body 13 adhered to the first fixing member 11 and the second fixing member 12 (Fig. 2). The first fixing member 11 and the second fixing member 12 are fixed to the beam 2 and the ceiling joist 3 by screws 4 that pass through them. Note that instead of screws 4, conventional fixing devices such as nails can also be used.

[0012] <2> First fixing member The first fixing member 11 has opposing, roughly rectangular side plates 111, a roughly rectangular bottom plate 112 connecting the lower ends of the side plates 111, and a roughly rectangular first fixing portion 113 erected at a right angle outward from the side edge of the side plate 111 (FIG. 3). The first fixing portion 113 can also be erected at a right angle inward from the side edge of the side plate 111 (FIG. 4). By erecting the first fixing portion 113 inward, the width of the vibration-proof hardware 1 is narrowed, allowing the vibration-proof hardware 1 to be used in narrow spaces, such as when the ceiling joists 3 are close to other components. The side plate 111 may have a rectangular cutout 114 at the bottom end on the side of the first fixing portion 113. By providing the cutout 114, the position of the bottom plate 112 can be lowered relative to the first fixing portion 113. The first fixing portion 113 has a through hole 115 through which a screw 4 for fixing to the beam 2 passes.

[0013] <3> Second fixing member The second fixing member 12 is flat and has a second fixing portion 121 and a joining portion 122 (FIG. 5). The second fixing portion 121 has a through hole 123 through which a screw 4 for fixing to the ceiling joist 3 passes.

[0014] <4> Viscoelastic body The viscoelastic body 13 is made of high-damping rubber, acrylic rubber, or the like. One surface of the viscoelastic body 13 is bonded to the inner surface of the side panel 111 of the first fixing member 11, and the other surface is bonded to the outer surface of the joint 122 of the second fixing member 12, so that the first fixing member 11 and the second fixing member 12 are integrated to form the vibration-damping hardware 1 (Figure 6). By adhering the first fixing member 11 and the second fixing member 12 to both sides of the viscoelastic body 13, the viscoelastic body 13 deforms (compression / tension in the thickness direction and tension in the shear direction) in accordance with the relative displacement of the first fixing member 11 and the second fixing member 12, thereby damping vibration.

[0015] <5> Vibration-proof material A vibration-isolating member 14 made of urethane, resin, or the like, having a rectangular parallelepiped shape and a predetermined thickness is disposed on the upper surface of the bottom plate 112 of the first fixing member 11 (FIGS. 2 and 6). The ceiling joist 3 is positioned above the vibration-damping member 14. When a notch 114 is provided in the first fixing member 11 and the bottom plate 112 is positioned lower than the first fixing portion 113, the ceiling joist 3 is positioned lower than the beam 2, and the ceiling material can be attached directly to the ceiling joist 3. Also, by providing a notch 31 in the ceiling joist 3 and abutting the underside of the notch 31 against the upper surface of the vibration-damping member 14 so that the vibration-damping member 14 fits into the notch 31, the ceiling joist 3 can be positioned lower than the beam 2. In this case, the underside of the ceiling joist 3 other than the notch 31 is positioned lower than the underside of the bottom plate 112 of the vibration-damping hardware 1, so that the vibration-damping hardware 1 does not interfere with the ceiling material when attaching it to the underside of the ceiling joist 3. In addition, if ceiling material is not attached to the ceiling joists 3 due to the structure of the ceiling, the notches 114 of the first fixing members 11 and the notches 31 of the ceiling joists 3 do not need to be provided. Since the vibration-isolating members 14 are made of urethane, resin, or the like, they are compressed by the weight of the ceiling joists 3. For this reason, the amount of compression due to the weight of the ceiling joists 3 is calculated in advance, and the thickness of the vibration-isolating members 14 is determined.

[0016] <6> Anti-vibration ceiling structure using anti-vibration hardware Next, a vibration-proof ceiling structure using the vibration-proof hardware 1 described above will be described.

[0017] <6.1> Vibration-proof ceiling structure The vibration-proof ceiling structure using vibration-proof hardware 1 consists of beams 2 arranged opposite each other, floor joists 5 fixed at both ends to the beams 2 and arranged in parallel to support the floor material on the upper floor, and ceiling joists 3 arranged between adjacent floor joists 5 to support the ceiling material on the lower floor (Figures 7 and 8). The vibration-damping hardware 1 fixes the first fixing portion 113 of the first fixing member 11 to the side surface of the beam 2 with a screw 4. When the side plate 111 has a notch 114 at the lower end, the bottom plate 112 is positioned lower than the beam 2 by aligning the lower end of the first fixing portion 113 with the lower end of the beam 2. The ceiling joists 3, which are perpendicular to the beams 2, are housed between the opposing side plates 111 of the first fixing member 11, and are supported by a bottom plate 112 and vibration-isolating members 14 arranged on its upper surface. At this time, by providing a gap between the end faces of the ceiling joists 3 and the beams 2, vibrations from the beams 2 are prevented from being directly transmitted to the ceiling joists 3. In addition, by providing notches 31 in the ceiling joists 3, the position of the ceiling joists 3 can be made lower than the beams 2. Then, the second fixing portion 121 of the second fixing member 12 is fixed to the side surface of the ceiling joist 3 with a screw 4. The vibration-proof hardware 1 of the present invention has two functions: connecting the beams 2 and ceiling joists 3, and damping vibrations, so that a vibration-proof ceiling structure can be constructed inexpensively.

[0018] <6.2> Function of vibration-proof ceiling structure (i) Upward displacement of ceiling joists (Figure 9) When vibrations act on the vibration-proof ceiling structure and the beams 2 move in a sinking direction, the ceiling joists 3 rise relatively, displacing the second fixing member 12 fixed to the ceiling joists 3 upward, causing a relative displacement between the second fixing member 12 and the first fixing member 11 fixed to the beams 2. This causes the viscoelastic body 13 to deform, and together with the vibration-proofing member 14, it performs vibration damping.

[0019] (ii) Downward displacement of ceiling joists (Figure 10) When vibrations act on the vibration-proof ceiling structure and the beams 2 move in the upward direction, the ceiling joists 3 are displaced downward relatively, compressing the vibration-proofing members 14. Also, the second fixing members 12 fixed to the ceiling joists 3 are displaced downward, causing a relative displacement between them and the first fixing members 11 fixed to the beams 2. This causes the viscoelastic body 13 to deform, and together with the vibration-proofing members 14, they perform vibration control.

[0020] (iii) Function of the drop prevention piece The bottom plate 112 of the first fixing member 11 is provided with a descent prevention piece 116 that stands upright from a side perpendicular to the side plate 111. In this case, the upper end of the descent prevention piece 116 is set so as to be positioned lower than the upper surface of the vibration-damping member 14 under normal conditions, and lower than the surface of the ceiling joist 3 that comes into contact with the vibration-damping member 14 when the ceiling joist 3 has sunk to the expected amount of sinking. Because the vibration-isolating members 14 are made of urethane, resin, etc., it is possible that they may melt in the event of a fire, etc. If the vibration-isolating members 14 were to melt, without the descent prevention pieces 116, the ceiling joists 3 would fall by up to the thickness of the vibration-isolating members 14, which could damage the ceiling material and equipment attached to the ceiling. On the other hand, by erecting the descent prevention pieces 116 from the bottom plate 112, the descent of the ceiling joists 3 is restricted at the height of the descent prevention pieces 116, thereby preventing damage to the ceiling material and equipment attached to the ceiling. In this embodiment, the drop prevention pieces 116 are provided on both sides of the side perpendicular to the side plate 111, but the above function can be achieved even if they are provided on only one of the sides perpendicular to the side plate 111.

[0021] [Example 2] In the above-mentioned Example 1, the second fixing member 12 is flat and the joint portion 122 is arranged facing the inside of the side plate 111 of the first fixing member 11, but in Example 2, the second fixing member 12 may be configured to have a flat second fixing portion 121 and joint portion 122, and a step portion 124 located between the second fixing portion 121 and the joint portion 122 (Figures 11 and 12). The step portion 124 is raised by the height of the viscoelastic body 13 . The second fixing portion 121 has a through hole 123 through which a screw 4 for fixing to the ceiling joist 3 passes. One surface of the viscoelastic body 13 is adhered to the outer surface of the side panel 111 of the first fixing member 11, and the other surface is adhered to the inner surface of the joint 122 of the second fixing member 12, so that the first fixing member 11 and the second fixing member 12 are integrated to form the vibration-damping hardware 1.

[0022] [Example 3] <1> Support material In the above-mentioned Examples 1 and 2, the vibration-damping hardware 1 was fixed directly to the beam 2 by abutting the first fixing portion 113 of the first fixing member 11 against the beam 2, but the vibration-damping hardware 1 may also be fixed to the beam 2 via the receiving material 6 by fixing the vibration-damping hardware 1 to a receiving material 6 made of a plate material and then fixing the receiving material 6 to the beam 2 (Figures 13 and 14). When fixing the vibration-damping hardware 1 directly to the beam 2, the work of fixing the high-placed beam 2 by inserting the screws 4 into the through holes 115 of the first fixing part 113 must be carried out on both sides of the ceiling joist 3 to be placed, and then the work of dropping the ceiling joist 3 into the vibration-damping hardware 1 must be carried out for each ceiling joist 3. On the other hand, when fixing the vibration-proof hardware 1 to the beam 2 via a support member 6, the support member 6 is made wide enough to accommodate the vibration-proof hardware 1 for the number of ceiling joists 3 to be placed between adjacent floor joists 5, and multiple vibration-proof hardware 1 and ceiling joists 3 are attached to the support member 6 in advance. Then, by lifting multiple ceiling joists 3 with support members 6 on both sides together and fixing the support members 6 to the surface of the beam 2, multiple ceiling joists 3 can be fixed together to the beam 2, reducing the amount of work at height and the work itself.

[0023] [Other Examples] In the above-mentioned Examples 1 to 3, the vibration-proof hardware 1 was used to form a vibration-proof ceiling structure by connecting the beams 2 and ceiling joists 3 in a ceiling structure consisting of beams 2, ceiling joists 3, and floor joists 5. However, the vibration-proof hardware 1 of the present invention can be applied to any combination of structural members that intersect at right angles in a T-shape in wooden buildings, such as the beams 2 and floor joists 5, or beams in a post-and-beam construction method, in addition to the combination of beams 2 and ceiling joists 3. [Explanation of symbols]

[0024] 1. Vibration-proof hardware 11 first fixing member, 111 side plate, 112 bottom plate, 113 first fixing portion, 114 notch, 115 through hole, 116 drop prevention piece 12 second fixing member, 121 second fixing portion, 122 joint portion, 123 through hole, 124 step portion 13 Viscoelastic body 14 Vibration-isolating member 2 beams 3 ceiling joists, 31 cutouts 4 bis 5 Floor joists 6 Support material

Claims

1. A vibration-isolating hardware that connects a first structural member and a second structural member that are perpendicular to each other in a wooden building, a first fixing member fixed to a side surface of the first structural member; a second fixing member fixed to a side surface of the second structural member; a viscoelastic body that adheres to the first fixing member and the second fixing member; a vibration-isolating member positioned between the first fixing member and the bottom surface of the second structural member, the first fixing member has opposing side plates, a bottom plate connecting lower ends of the side plates, and a first fixing portion standing outward or inward from a side edge of the opposing side plate at a right angle and abutting against a side surface of the first structural material; the second fixing member has a second fixing portion that abuts against a side surface of the second structural material and a joining portion that is disposed opposite the side plate of the first fixing member, the viscoelastic body bonds the side plate of the first fixing member and the joint portion of the second fixing member together, the vibration-isolating member is provided between an upper surface of the bottom plate of the first fixing member and a bottom surface of the second structural member, The bottom plate of the first fixing member is provided with a drop prevention piece extending upward from at least one of the sides perpendicular to the side plate. Vibration-damping hardware.

2. The side plate of the first fixing member has a notch at a lower end of an end portion on the first fixing portion side. The vibration-damping hardware according to claim 1.

3. the second fixing member has a step portion located between the second fixing portion and the joint portion, The joint portion of the second fixing member is disposed opposite to an outer surface of the side plate of the first fixing member. The vibration-damping hardware according to claim 2.

4. the joint portion of the second fixing member abuts against a side surface of the second structural member and is disposed opposite to an inner surface of the side plate of the first fixing member. The vibration-damping hardware according to claim 2.

5. Oppositely arranged beams; Floor joists that are fixed at both ends to the beams and arranged in parallel to support floor materials on the upper floor; and a ceiling joist arranged between adjacent floor joists to support the ceiling material of the lower floor. The vibration-proof metal fittings according to any one of claims 1 to 4 are characterized in that the first structural material is the beam and the second structural material is the ceiling joist, and the first structural material is arranged at both ends of the ceiling joist to connect the beam and the ceiling joist. Anti-vibration ceiling structure.

6. A notch is provided on the underside of each end of the ceiling joist, The ceiling joist is connected to the beam via the vibration-isolating hardware by abutting the lower surface of the cutout with the upper surface of the vibration-isolating member, The lower surface of the ceiling joist other than the notch is located below the lower surface of the bottom plate of the vibration-proof metal fitting. The vibration-proof ceiling structure according to claim 5.

7. A plate-shaped support member is disposed between the beam and the ceiling joist, The vibration-proof hardware is fixed to the beam via the support member. The vibration-proof ceiling structure according to claim 6.

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