Vibration-damping hardware and vibration-damping structure using the same

Abstract

To provide a vibration control hardware capable of controlling vibration of ceilings on lower floors.SOLUTION: A vibration control hardware for connecting a joist to a ceiling beam comprises a first fixing member fixed to a lateral surface of the ceiling beam, a second fixing member fixed to a lateral surface of the joist, and a viscoelastic body bonded to the first and second fixing members, wherein the first fixing member has opposing side plates, a bottom plate connecting bottom ends of the side plates, and a first fixing portion standing at a right angle outwardly from side edges of the opposing side plates and contacting the lateral surface of the ceiling beam, the second fixing member has a second fixing portion contacting the lateral surface of the joist, a joint portion positioned opposite an outer surface of the side plate of the first fixing member, and a step located between the second fixing portion and the joint portion, and the viscoelastic body bonds the outer surface of the side plate of the first fixing member and an inner surface of the joint portion of the second fixing member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vibration-damping hardware that connects orthogonal structural members in wooden buildings and also damps vibrations, and a vibration-damping structure using 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. In this structure, the ceiling surface material on the lower floor is attached to the ceiling joists, and because the ceiling joists are independent of the floor joists, the transmission of vibrations caused by impact noise from the floor joists to the ceiling surface material on the lower floor can be suppressed. [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 can suppress the propagation of vibrations caused by impact noise from the floor above by damping the ceiling joists to which the ceiling surface material is attached.

[0005] The present invention aims to provide a vibration-damping hardware that can damp the vibration of the ceiling of the floor below, and a vibration-damping 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-mentioned object, is a vibration-damping hardware that connects first and second structural materials that intersect at right angles in a wooden building, and has a first fixing member that is fixed to the side of the first structural material, a second fixing member that is fixed to the side of the second structural material, and a viscoelastic body that is adhered to the first fixing member and the second fixing member, wherein the first fixing member has opposing side panels, a bottom panel that connects the lower ends of the side panels, and a first fixing portion that stands perpendicularly outward from the side edges of the opposing side panels and abuts the side of the first structural material, and the second fixing member has a second fixing portion that abuts the side of the second structural material and a joint that is positioned opposite the side panel of the first fixing member, and the viscoelastic body adheres the side panel of the first fixing member to the joint of the second fixing member. The first fixing member may have a bottom plate on an upper surface thereof, and a vibration-damping member provided between the top surface of the bottom plate and the bottom surface of the second structural member. The side plate of the first fixing member may have a rectangular 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. We also provide a vibration-damping structure using the above-mentioned vibration-damping hardware, characterized in that the first fixing portion of the first fixing member is fixed to the side of the first structural material, the second structural material is accommodated between the opposing side plates of the first fixing member of the vibration-damping hardware, and the second fixing portion of the second fixing member is fixed to the side of the second structural material. [Effects of the Invention]

[0007] The present invention can achieve at least one of the following effects by solving the above-mentioned problems. (1) The viscoelastic body deforms and can damp vibration together with the damping member. (2) Vibration-damping hardware has two functions: connecting ceiling beams and floor joists and damping them, so vibration-damping structures can be constructed inexpensively. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a vibration damping structure according to the present invention; [Figure 2] An exploded perspective view of the vibration damping hardware of the present invention. [Figure 3] FIG. 10 is a perspective view of a first fixing member; [Figure 4] FIG. 10 is a perspective view of a second fixing member; [Figure 5] Cross-sectional view of the vibration-damping hardware of the present invention [Figure 6] Explanatory diagram of the vibration damping structure of the present invention (1) [Figure 7] Explanatory diagram of the vibration damping structure of the present invention (2) [Figure 8] 1 is a perspective view of a vibration damping structure according to a second embodiment of the present invention; [Figure 9] 1 is an exploded perspective view of a vibration-damping hardware according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present invention will be described in detail below with reference to the drawings.

[0010] [Example 1] <1> Overview of vibration control hardware In this embodiment, a vibration-damping hardware 1 of the present invention connects a floor joist 3 to a ceiling beam 2 (FIG. 1). The vibration-damping hardware 1 consists of a first fixing member 11 fixed to the side of the ceiling beam 2, two second fixing members 12 fixed to both sides of the floor joists 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 ceiling beam 2 and the floor joists 3 by nails 4 that pass through them. Note that instead of nails 4, conventional fixing devices such as screws may also be used.

[0011] <2> First fixing member The first fixing member 11 has opposing side plates 111, a bottom plate 112 connecting the lower ends of the side plates 111, and a first fixing portion 113 erected at a right angle outward from the side edge of the side plate 111 (FIG. 3). 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 nail 4 for fixing to the ceiling beam 2 passes.

[0012] <3> Second fixing member The second fixing member 12 has a flat plate-shaped second fixing portion 121, a joint portion 122, and a step portion 123 located between the second fixing portion 121 and the joint portion 122 (FIG. 4). The step portion 123 is raised by the height of the viscoelastic body 13 . The second fixing portion 121 has a through hole 124 through which a nail 4 for fixing to the floor joist 3 passes.

[0013] <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 outer surface of the side panel 111 of the first fixing member 11, and the other surface is bonded 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 (Figure 5). 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 in accordance with the relative displacement of the first fixing member 11 and the second fixing member 12, thereby performing vibration damping.

[0014] <5> vibration-damping material A vibration-damping member 14 made of urethane, resin, or the like and having a predetermined thickness is disposed on the upper surface of the bottom plate 112 of the first fixing member 11 (FIGS. 2 and 5). The floor joists 3 are positioned above the vibration-damping members 14. In this case, cutouts 31 are provided in the floor joists 3, and the vibration-damping members 14 fit into the cutouts 31, so that the floor joists 3 are positioned lower than the ceiling beams 2, allowing the ceiling material to be attached directly to the floor joists 3. Note that if the ceiling structure does not require the ceiling material to be attached to the floor joists 3, the cutouts 31 do not need to be provided. Since the vibration-damping member 14 is made of urethane, resin, or the like, it is compressed by the weight of the floor joists 3. For this reason, the amount of compression due to the weight of the floor joists 3 is calculated in advance, and the thickness of the vibration-damping member 14 is determined.

[0015] <6> Vibration-damping structure for ceiling beams and floor joists using vibration-damping hardware Next, a vibration-damping structure for ceiling beams and floor joists using the above-mentioned vibration-damping hardware 1 will be described.

[0016] <6.1> Vibration control structure The vibration-damping hardware 1 fixes the first fixing portion 113 of the first fixing member 11 to the side surface of the ceiling beam 2 with a nail 4. When the side panel 111 has a notch 114 at the lower end, the bottom plate 112 is positioned lower than the ceiling beam 2 by aligning the lower end of the first fixing portion 113 with the lower end of the ceiling beam 2. The floor joists 3, which are perpendicular to the ceiling 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-damping members 14 arranged on the upper surface thereof. By providing a notch 31 in the floor joists 3, the floor joists 3 can be positioned lower than the ceiling beams 2. Then, the second fixing portion 121 of the second fixing member 12 is fixed to the side surface of the common joist 3 with a nail 4 . The vibration-damping hardware 1 of the present invention has two functions: a function of connecting the ceiling beam 2 and the floor joist 3, and a function of vibration damping, so that a vibration-damping structure can be constructed inexpensively.

[0017] <6.2> Action of vibration control structure (i) Downward displacement (Fig. 6) When vibration acts on the vibration-damping structure and a downward force acts on the joists 3, the vibration-damping members 14 are compressed, the joists 3 sink, and the second fixing members 12 fixed to the joists 3 are displaced downward, causing a relative displacement between them and the first fixing members 11 fixed to the ceiling beams 2. This causes the viscoelastic body 13 to deform, and together with the vibration-damping members 14, they perform vibration damping.

[0018] (ii) Upward displacement (Fig. 7) When vibration acts on the vibration-damping structure and an upward force acts on the floor joist 3, the floor joist 3 rises up, displacing the second fixing member 12 fixed to the floor joist 3 upward, causing a relative displacement between the second fixing member 12 and the first fixing member 11 fixed to the ceiling beam 2. This causes the viscoelastic body 13 to deform, and together with the vibration-damping member 14, it performs vibration damping.

[0019] [Example 2] In the above-described first embodiment, the second fixing member 12 has a step 123 that raises the joint 122 to the height of the viscoelastic body 13, so that the joint 122 faces the outside of the side plate 111 of the first fixing member 11. However, in the second embodiment, the second fixing member 12 does not have a step 123, and the second fixing member 12 and the joint 122 are in the same plane. The second fixing member 12 may be in contact with the joist 3, so that the joint 122 faces the inside of the side plate 111 of the first fixing member 11 (FIGS. 8 and 9). One surface of the viscoelastic body 13 is bonded to the inner surface of the side plate 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 .

[0020] [Other Examples] In the above-mentioned Examples 1 and 2, the ceiling beam 2 and floor joist 3 are connected using the vibration-damping hardware 1, but the vibration-damping 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 a ceiling beam and floor joist, or beams in a post-and-beam construction method, rather than being limited to a combination of a ceiling beam and a ceiling joist. [Explanation of symbols]

[0021] 1 Vibration-damping hardware 11 first fixing member, 111 side plate, 112 bottom plate, 113 first fixing portion, 114 notch, 115 through hole 12 second fixing member, 121 second fixing portion, 122 joint portion, 123 step portion, 124 through hole 13 Viscoelastic body 14 Vibration-damping member 2 ceiling beams 3 joists, 31 notches 4 nails

Claims

1. A vibration-damping 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 is adhered to the first fixing member and the second fixing 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 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, Vibration control hardware.

2. The first fixing member has a bottom plate and a vibration-damping member provided between the top surface of the bottom plate and the bottom surface of the second structural member. The vibration-damping hardware according to claim 1.

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

4. 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 3.

5. 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 3.

6. The first fixing portion of the first fixing member is fixed to a side surface of the first structural member; The second structural member is accommodated between the opposing side plates of the first fixing member of the vibration-damping hardware, The second fixing portion of the second fixing member is fixed to a side surface of the second structural material. A vibration-damping structure using the vibration-damping hardware according to any one of claims 1 to 5.

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