Vibration reduction device and method for mounting vibration reduction device

Abstract

To provide a vibration reduction device and a method for mounting a vibration reduction device which have simple structures and facilitate construction.SOLUTION: A vibration reduction device 1 is arranged between a floor structure part (beam 21 or the like) of an object floor 2 of a building, for example, and a floor structure part (beam 31 or the like) of an upper floor 3 of the object floor. The vibration reduction device 1 is formed by engaging, in a vertical arrangement, a first vertical arrangement member 11 which is fixed to one of the floor structure parts of the object floor 2 and the upper floor 3, and a second vertical arrangement member 12 fixed to the other floor structure part. A first notch part 11a is formed in the first vertical arrangement member 11, a second notch part 12a is formed in the second vertical arrangement member 12, and a vibration absorber 13 for absorbing vibration by elastic modulation is arranged in a space formation place by the first notch part 11a and the second notch part 12a.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration reduction device disposed between floor structure parts of a building and a method for attaching the vibration reduction device.

Background Art

[0002] When the long-span of a building beam progresses, there is a high possibility of a problem that vibrations caused by daily activities such as walking in a room on the target floor affect the upper and lower floors of the target floor. The reason is that the vibrations generated on the target floor are propagated to the upper and lower floors through the intermediate columns. In particular, in a structure where intermediate columns are arranged independently only on the target floor instead of through columns, there is a risk that the floors joined by the target floor and the intermediate columns vibrate integrally.

[0003] Patent Document 1 discloses a vibration reduction structure in which a support member is provided between two steel pipes arranged between floor slabs of upper and lower floors. The support member contains a viscoelastic body, and this viscoelastic body absorbs vibration energy by deforming in response to the vibration of the floor slab.

[0004] Patent Document 2 discloses a vibration damping intermediate column that reduces floor vibration by connecting a first floor structure and a second floor structure located above it to each other. Also in this technology, a viscoelastic body is used.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, although the technique in Patent Document 1 where the support member includes a viscoelastic body has a relatively simple vibration reduction structure, it cannot be said to be a vibration reduction structure that is easy to construct. Further, the vibration damping intermediate column described in Patent Document 2 has a problem that the structure becomes complicated because bolts and the like are frequently used.

[0007] An object of the present invention is to provide a vibration reduction device having a simple structure and easy to construct, and a method for attaching the vibration reduction device.

Means for Solving the Problems

[0008] In order to solve the above problems, the vibration reduction device of the present invention is a vibration reduction device disposed between a floor structure portion of a target floor of a building and a floor structure portion of at least one other floor of the upper floor and the lower floor of the target floor, a first vertically disposed member fixed to one of the floor structure portions of the floor structure portion of the target floor and the floor structure portion of the other floor, and a second vertically disposed member fixed to the floor structure portion of the other floor are engaged in a vertical arrangement, a first notch portion is formed at an engagement portion of the first vertically disposed member with the second vertically disposed member, a second notch portion is formed at an engagement portion of the second vertically disposed member with the first vertically disposed member, and a vibration absorber that absorbs vibration by elastic deformation is disposed at a space forming portion formed by the first notch portion and the second notch portion.

[0009] The vibration reduction device having such a configuration is composed of the first vertically disposed member, the second vertically disposed member, and a vibration absorber disposed at a space forming portion formed by the first notch portion and the second notch portion of these vertically disposed members. Therefore, a simple structure can be realized, and the construction of attaching this vibration reduction device to a building also becomes easy. Further, while using this vibration reduction device as an intermediate column, it is possible to prevent vibration generated on the target floor from propagating to the upper and lower floors through the vibration reduction device. Also, even if construction errors in the floor structure portion or deflection of the floor due to heavy objects occur, the vibration absorber can absorb this construction error and deflection, so that it is possible to suppress the influence of this construction error and deflection on the lower floor.

[0010] The first longitudinally arranged member of the plate-like body and the second longitudinally arranged member of the plate-like body may have a positional relationship in which they are rotated 90 degrees relative to each other around the longitudinal center of the longitudinal arrangement, and the cross section of the space forming portion formed by the first notch portion and the second notch portion may be substantially cross-shaped. According to this, a simple structure using the first longitudinally arranged member and the second longitudinally arranged member of the plate-like body is obtained, and cost reduction can also be achieved.

[0011] The first longitudinally arranged member and the second longitudinally arranged member of the plate-like body may be provided with reinforcing members. According to this, it is possible to prevent the first longitudinally arranged member and the second longitudinally arranged member of the plate-like body from buckling due to an excessive load on this vibration reduction device.

[0012] In these vibration reduction devices, the first longitudinally arranged member and the second longitudinally arranged member may have the same shape. According to this, since the first longitudinally arranged member and the second longitudinally arranged member may be arranged either above or below each other, the installation work of this vibration reduction device becomes even easier.

[0013] Moreover, the method for installing the vibration reduction device of the present invention is a method of installing this vibration reduction device between the floor structure portion of the target floor of the building and the floor structure portion of at least one of the upper floor and the lower floor of the target floor, and in the space forming portion formed by the first notch portion and the second notch portion, with the vibration absorber fitted therein, the vibration reduction device whose overall length is temporarily shortened by contracting the vibration absorber is arranged at a predetermined position between the floor structure portions.

[0014] With such a method, by the operation of temporarily contracting the vibration absorber, the overall length of the vibration reduction device is temporarily shortened for construction, so the installation work of the vibration reduction device is easy. Also, it becomes easy to perform post-construction on an existing building.

Advantages of the Invention

[0015] The present invention has various advantages such as a simple structure and easy construction.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. As shown in FIG. 1, the vibration reduction device 1 of the embodiment is disposed between a dry floor structure part of a target floor 2 (any floor) of a building and a dry floor structure part of an upper floor 3 (other floor) of the target floor 2. These floor structure parts have beams 21 and 31 made of, for example, H-shaped steel. Further, in the above floor structure part, for example, a floor slab 22 made of ALC (lightweight cellular concrete), PCa (precast concrete), etc. is disposed and fixed on the beam 21, and a floor slab 32 made of ALC, PCa, etc. is disposed and fixed on the beam 31. Of course, the vibration reduction device 1 can also be disposed between the floor structure part of the target floor 2 and the floor structure part of the lower floor 4 of the target floor 2.

[0018] As shown in FIGS. 2(A) and 2(B), the vibration reduction device 1 includes a first vertically arranged member 11 and a second vertically arranged member 12. The first vertically arranged member 11 and the second vertically arranged member 12 have the same shape as each other, and one of them is fixed to a beam 21 which is a floor structure part of the target floor 2, and the other is fixed to a beam 31 which is a floor structure part of the upper floor 3. That is, the vibration reduction device 1 has a first vertically arranged member 11 fixed to a floor structure part of one of the target floor 2 and the upper floor 3, and a second vertically arranged member 12 fixed to a floor structure part of the other of the target floor 2 and the upper floor 3, and they are arranged vertically and engaged with each other. In this embodiment, the first vertically arranged member 11 is arranged on the upper side and the second vertically arranged member 12 is arranged on the lower side.

[0019] A first notch 11a is formed at an end of the first vertically arranged member 11 which is an engagement portion with the second vertically arranged member 12. Also, a second notch 12a is formed at an end of the second vertically arranged member 12 which is an engagement portion with the first vertically arranged member 11.

[0020] The first vertically arranged member 11 and the second vertically arranged member 12 have a positional relationship rotated 90 degrees relative to each other around the vertical center of the vertical arrangement, and the cross section of the space forming portion by the first notch 11a and the second notch 12a is substantially cross-shaped.

[0021] The first vertically arranged member 11 and the second vertically arranged member 12 are each made of a flat steel plate (plate-like body) with a width of about 80 mm and a thickness of about 16 mm. The first notch 11a is formed at the center position in the width direction of the first vertically arranged member 11 with a width of about 10 mm, and the second notch 12a is formed at the center position in the width direction of the second vertically arranged member 12 with a width of about 10 mm.

[0022] The height (depth) of the first notch portion 11a and the height (depth) of the second notch portion 12a are such that, with the first vertically arranged member 11 and the second vertically arranged member 12 fixed to the beam 21 and the beam 31 respectively, a space of a predetermined height is formed by the first notch portion 11a and the second notch portion 12a, and a part of the non-notch portion of the first vertically arranged member 11 adjacent to the first notch portion 11a enters the second notch portion 12a, and a part of the non-notch portion of the second vertically arranged member 12 adjacent to the second notch portion 12a enters the first notch portion 11a and they can mesh with each other.

[0023] And vibration absorbers 13 (such as anti-vibration rubber, coil springs, etc.) for absorbing vibrations by elastic deformation are respectively arranged in the first notch portion 11a and the second notch portion 12a. The size of the horizontal cross-section of the vibration absorber 13 is, for example, 10 mm × 16 mm. Also, the total height of these vibration absorbers 13 is made higher than the height of the above-mentioned space portion that can be formed at the space-forming location by the first notch portion 11a and the second notch portion 12a (for example, about twice the height of the space portion). When assembled as the vibration reduction device 1 and fixed to the beams 21, 31, the vibration absorber 13 is compressed to about half of its original height and accommodated in the above-mentioned space portion. Note that, instead of arranging the vibration absorber 13 in each of the first notch portion 11a and the second notch portion 12a, one vibration absorber 13 can also be arranged.

[0024] Also, as an example, the first vertically arranged member 11 and the second vertically arranged member 12 each have fixing plate portions 111, 121, and each fixing plate portion 111, 121 is fixed to the beams 21, 31 by C-type clamps C.

[0025] The vibration reduction device 1 configured as described above is composed of the first vertically arranged member 11, the second vertically arranged member 12, and the vibration absorber 13 arranged at the space-forming location by the first notch portion 11a and the second notch portion 12a of these vertically arranged members 11, 12. Therefore, it has a simple structure, and the construction of attaching this vibration reduction device 1 to a building also becomes easy.

[0026] Furthermore, while using this vibration reduction device 1 as a partition column, it is possible to prevent the vibration generated on the target floor 2 from propagating to the upper floor 3 through the vibration reduction device 1, and conversely, it is possible to prevent the vibration generated on the upper floor 3 from propagating to the target floor 2 through the vibration reduction device 1. Fig. 3(A) shows a configuration example in which the vibration reduction device 1 is used as a partition column and an inner wall panel P is arranged on this partition column vibration reduction device 1. The inner wall panel P is composed of steel runners arranged at upper and lower positions and steel studs arranged between these steel runners. Fig. 3(B) shows a horizontal cross-section of a structural part in which the outer periphery of the vibration reduction device 1 is surrounded by a gypsum board B.

[0027] Also, with this vibration reduction device 1, for example, even if construction errors or deflections due to heavy objects occur in the floor structure part (beam 31), the vibration absorber 13 can absorb these construction errors and deflections, so it is possible to suppress the influence of these construction errors and deflections on the target floor 2 and the like.

[0028] In addition, in this vibration reduction device 1 of this embodiment, the first vertically arranged member 11 and the second vertically arranged member 12 have a positional relationship in which they are rotated 90 degrees relative to each other around the vertical center of the above vertical arrangement, and the cross-section of the space-forming part by the first notch part 11a and the second notch part 12a of each other is substantially cross-shaped, and it has a simple structure using a steel plate (plate-like body), so cost reduction can also be achieved.

[0029] Moreover, in this vibration reduction device 1 of this embodiment, the first vertically arranged member 11 and the second vertically arranged member 12 have the same shape as each other, and the first vertically arranged member 11 and the second vertically arranged member 12 may be arranged either above or below each other, so the installation work of this vibration reduction device 1 becomes even easier.

[0030] Next, a construction example of attaching the vibration reduction device 1 between the floor structure of the target floor 2 and the floor structure of the upper floor 3 of the building is shown below. In this example, the vibration absorber 13 is pre-fitted into the space formed by the first notch 11a of the first vertically arranged member 11 and the second notch 12a of the second vertically arranged member 12. Then, the vibration absorber 13 is compressed to temporarily shorten the overall length of the vibration reduction device 1. This vibration reduction device 1 is arranged at a predetermined position between the floor structure of the target floor 2 and the floor structure of the upper floor 3, the above compression is released, and the fixing plate portions 111 and 121 of the first vertically arranged member 11 and the second vertically arranged member 12 are fixed to the beams 21 and 31 by the C-shaped clamp C.

[0031] Even when the vibration reduction device 1 is attached in post-construction after the building is completed, since hole processing and the like for fastening the fixing plate portions 111 and 121 to the beams 21 and 31 are not required, as described above, the fixing plate portions 111 and 121 can be easily fixed to the beams 21 and 31 by the C-shaped clamp C. In normal construction, bolt insertion holes for fastening the fixing plate portions 111 and 121 to the beams 21 and 31 are formed in advance, and the fixing plate portions 111 and 121 can also be fastened to the beams 21 and 31 by bolts and nuts.

[0032] Note that if the width of the first notch 11a and the width of the second notch 12a are increased, a slit-like gap is formed around the above space formation location in a state where the vibration reduction device 1 is arranged and fixed between the floor structure of the target floor 2 and the floor structure of the upper floor 3. Therefore, it becomes possible to push the vibration absorber 13 into the above space formation location from this gap. That is, after the vibration reduction device 1 is arranged and fixed between the floor structures, the vibration absorber 13 can also be set in the above space formation location. In particular, even when such an attachment method is not used, a structure in which a slit-like gap is formed around the above space formation location may be adopted.

[0033] FIG. 4 shows a modified example of the vibration reduction device 1. In the vibration reduction device 1 according to this modified example, the first vertically arranged member 11 and the second vertically arranged member 12 are provided with reinforcing members 11b and 12b so as to form a substantially cross shape in plan view at locations other than the above-described space-forming locations. The plate thicknesses of the reinforcing members 11b and 12b are, for example, the same as the plate thicknesses of the vertically arranged members 11 and 12. The locations other than the above-described space-forming locations can be said to be ranges where the reinforcing member 11b does not contact the upper end of the second vertically arranged member 12 and the reinforcing member 12b does not contact the lower end of the first vertically arranged member 11.

[0034] For the vibration reduction device 1 according to such a modified example, it is possible to prevent buckling from occurring in the first vertically arranged member 11 and the second vertically arranged member 12 due to an excessive vertical load being applied to the vibration reduction device 1.

[0035] FIG. 5 shows another modified example of the vibration reduction device 1. The vibration reduction device 1 according to this other modified example includes first vertically arranged members 11, 11 each having two plate-like bodies arranged in parallel with each other, and second vertically arranged members 12, 12 each having two plate-like bodies arranged in parallel with each other. They have a positional relationship rotated 90 degrees relative to each other around the vertical center of the vertical arrangement, and the cross section of the space-forming location formed by the first notch portions 11a and the second notch portions 12a of each other forms a substantially cross shape.

[0036] As described above, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made within the same scope or an equivalent scope as the present invention with respect to the illustrated embodiments.

Explanation of Reference Numerals

[0037] 1: Vibration reduction device 2: Target floor 3: Upper floor 4: Lower floor 11: First vertically arranged member 11a: First notch portion 11b: Reinforcing member 12: Second vertically arranged member 12a: Second notch portion 12b: Reinforcing member 13: Vibration absorber 21: Beam 22: Floor slab 31: Beam 32: Floor slab 111: Fixed plate portion 121: Fixed plate portion B: Gypsum board C: C-type clamp P: Inner wall panel

Claims

1. A vibration reduction device disposed between a floor structure portion of a target floor of a building and a floor structure portion of at least one other floor among the upper and lower floors of the target floor, wherein: a first vertically disposed member fixed to one of the floor structure portions of the floor structure portion of the target floor and the floor structure portion of the other floor, and a second vertically disposed member fixed to the floor structure portion of the other floor are engaged in a vertical alignment; a first notch is formed at the engagement portion of the first vertically disposed member with the second vertically disposed member, a second notch is formed at the engagement portion of the second vertically disposed member with the first vertically disposed member, and a vibration absorber that absorbs vibration by elastic deformation is disposed at the space forming portion formed by the first notch and the second notch. A vibration reduction device characterized by this.

2. The vibration reduction device according to claim 1, wherein the plate-shaped first vertically disposed member and the plate-shaped second vertically disposed member have a positional relationship rotated 90 degrees relative to each other around the vertical center of the vertical alignment, and the cross section of the space forming portion formed by the first notch and the second notch is substantially cross-shaped. A vibration reduction device characterized by this.

3. The vibration reduction device according to claim 2, wherein the first vertically disposed member and the second vertically disposed member of the plate-shaped body are provided with reinforcing members. A vibration reduction device characterized by this.

4. The vibration reduction device according to any one of claims 1 to 3, wherein the first vertically disposed member and the second vertically disposed member have the same shape. A vibration reduction device characterized by this.

5. A method of attaching the vibration reduction device according to claim 1 between a floor structure portion of a target floor of a building and a floor structure portion of at least one other floor among the upper and lower floors of the target floor, wherein the vibration absorber is shrunk with the vibration absorber fitted into the space forming portion formed by the first notch and the second notch to temporarily shorten the overall length, and the vibration reduction device thus obtained is disposed at a predetermined position between the floor structure portions. A method of attaching a vibration reduction device characterized by this.

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