JP5741911B2 - Vibration isolator for building floor and building floor structure - Google Patents

Description

  The present invention relates to a vibration isolator for a building floor and a building floor structure using the same.

  Conventionally, in a building such as a house or a condominium, as a measure for reducing floor impact sound propagating from an upper floor to a lower floor, for example, a method of increasing the weight of the floor material has been adopted. However, in this case, a great burden is imposed on the structural frame with a great deal of weight.

  Therefore, the floor structure is designed to reduce floor impact noise without placing a heavy burden on the structural frame by supporting the flooring with vibration isolation by interposing an anti-vibration rubber between the floor beam and the flooring. Various proposals have been made. However, in such a floor structure, the anti-vibration rubber is not only deformed in the vertical direction but also deformed in the horizontal direction, so that the flooring material is easily shaken in the vertical direction and the horizontal direction. In this case, even if an attempt is made to abolish the horizontal brace by increasing the horizontal rigidity of the flooring material, it is difficult to bear the horizontal force by the flooring material, and therefore it has not been possible to reduce the cost by eliminating the horizontal brace.

  In recent years, for example, as disclosed in Patent Documents 1 to 3, a vibration isolator has been proposed that effectively attenuates mainly vibration in the vertical direction and has rigidity in the horizontal direction. In this type of vibration isolator, a plurality of cylindrical rigid bodies having different diameters and a plurality of cylindrical elastic bodies having different diameters are laminated and integrated alternately so that their central axes are along the vertical direction. It is easy to deform in the vertical direction, and difficult to deform in the horizontal direction. If such a vibration isolator is applied to the floor of a building such as a house or apartment, it will be possible to bear the horizontal force by the floor material while reducing the floor impact noise, and the horizontal brace Cost reduction by abolition can be realized.

Japanese Patent Laid-Open No. 10-259853 Japanese Patent Laid-Open No. 11-229666 JP 2000-130506 A

  However, in the vibration isolator as described above, consideration for effectively applying to the floor in a building such as a house or an apartment, that is, consideration to keep the height of the device as low as possible has not been made sufficiently, Many of them have structures that are likely to increase in size. For this reason, when such a vibration isolator is applied as it is to the floor of a building such as a house or apartment (specifically, when it is interposed between the floor beam and the flooring), the floor level is high. There was a problem of becoming.

  The present invention eliminates the above problems and reduces floor impact noise, while realizing cost reduction by eliminating horizontal braces, and is compactly interposed between the floor beam and the flooring material. An object of the present invention is to provide a vibration isolator for a building floor that can keep the noise level low, and a building floor structure using the same.

In order to solve the above problems, a vibration isolator 1 for a building according to the present invention is a vibration isolator 1 for a building floor interposed between a floor beam (2) and a floor material (3), A lower fixed base (10) for fixing to the floor beam (2), an upper movable base (20) for installing the flooring (3), the fixed base (10) and the movable base (20); and a vibration-proof material (30) which is interposed between said vibration proof material (30), a plurality of different cylindrical rigid body having a length the same size of the central axis (31 ...) center A plurality of cylindrical elastic bodies (32,...) Having the same axial length and different diameters are alternately laminated and integrated so that their central axes are along the vertical direction , and the outer surface is an elastic body (32 substantially covered by 34C) are formed on the short cylindrical, the entire inner peripheral surface of the central hole (35) of the vibration-proof material (30), rising of the fixing base (10) Parts with fixedly joined to the outer peripheral surface (12), wherein the entire outer peripheral surface of the vibration-proof material (30), of the hanging frame portion of the movable table which surrounds the rising shaft portion (12) (20) (22) The movable base (20) is vibration-proof supported so as to be movable up and down with respect to the fixed base (10) by being bonded and fixed to the peripheral surface, and in the initial state before the flooring (3) is installed, The upper surface (30a) and the lower surface (30b) of the vibration member (30) are inclined upward from the inner peripheral surface of the central hole (35) toward the outer peripheral surface.

  The movable table 20 includes a mounting plate 21 on which the flooring 3 is mounted, and the mounting plate 21 includes the rising shaft portion 12 of the fixed table 10 and the shaft 12 when the movable table 20 moves downward. An escape hole 21a for avoiding interference with the vibration isolator 30 is formed, and the hanging frame portion 22 is suspended from around the escape hole 21a of the mounting plate 21 described above.

  Further, the upper end portions of the cylindrical elastic bodies 32... Are integrally connected by the upper surface elastic body 33, and the upper end portions of the cylindrical rigid bodies 31. The lower ends of the cylindrical elastic bodies 32... Are integrally connected by a lower surface elastic body 34 so that the lower ends of the cylindrical rigid bodies 31.

  The floor structure of a building according to the present invention is characterized in that the vibration isolator 1 is interposed between a floor beam 2 and a floor material 3.

  In the floor structure to which the vibration isolator of the present invention is applied, the vibration accompanied by the floor impact sound generated in the floor material can be attenuated by the shear deformation of the vibration isolator, and the floor impact sound can be reduced. In addition, in the vibration isolator, the plurality of cylindrical rigid bodies having different diameters are arranged at intervals in the horizontal direction so that the central axis thereof is along the vertical direction. And has high rigidity. For this reason, it becomes possible to bear the horizontal force by the flooring material, and it is possible to realize cost reduction by eliminating the horizontal brace.

  Furthermore, in the initial state before installation of the flooring material, the vibration isolator is installed on the movable base because the upper and lower surfaces of the vibration damping material are inclined upward from the inner peripheral part toward the outer peripheral part. In the state of use, the upper and lower surfaces of the vibration isolator can be made substantially horizontal. Thereby, the height of the vibration isolator can be kept low, and the floor level can be kept low by being compactly interposed between the floor beam and the floor material. In addition, when the flooring is installed, the top and bottom surfaces of the vibration isolator are substantially horizontal (the inner peripheral portion and the outer peripheral portion of the vibration isolator are not displaced in the vertical direction). Compared to the case where the inner and outer peripheral parts of the anti-vibration material are displaced in the vertical direction, the anti-vibration material is less likely to deform in the horizontal direction and the rigidity in the horizontal direction is stable. Can be increased.

  In addition, an escape hole is formed in the mounting plate of the movable table so that the mounting plate does not interfere with the rising shaft portion of the fixed table and the vibration isolator when the movable table is moved downward. Compared with the case where it is not, the height position of a mounting plate can be made low and, thereby, the height of a vibration isolator can be suppressed further low.

  Further, in the vibration isolator, the cylindrical rigid body and the cylindrical elastic body are covered by the upper and lower elastic bodies integrated with the cylindrical elastic body at the upper end and the lower end of the cylindrical rigid body. Misalignment and peeling at the polymerized portion can be suppressed, and the durability of the vibration isolator can be improved.

It is a disassembled perspective view of the floor structure of the building which uses the vibration isolator which concerns on one Embodiment of this invention. It is a perspective view which shows the attachment state to the floor beam of a vibration isolator. It is a principal part longitudinal cross-sectional view of the floor structure of a building. It is a top view of the vibration isolator of an initial state. It is a longitudinal cross-sectional view of the vibration isolator of an initial state. It is a figure for demonstrating the difference in the height dimension of the vibration isolator which concerns on one Embodiment of this invention, and the vibration isolator of a comparative example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, a vibration isolator 1 according to an embodiment of the present invention is applied to a floor portion of an upper floor of a detached house or an apartment house, and includes a floor beam 2 and a floor material 3. The vibration in the vertical direction accompanied by the floor impact sound generated in the floor material 3 is effectively damped by supporting the floor material 3 in an anti-vibration manner.

  The floor beam 2 is made of, for example, H-shaped steel, and the flanges 2a and 2a are arranged so as to be parallel in the vertical direction. The flooring 3 is configured by, for example, arranging a plurality of rectangular floor panels 4... With increased horizontal rigidity.

  As shown in FIG. 3, the vibration isolator 1 includes a lower metal fixed base 10 that is fixed to the floor beam 2, an upper metal movable base 20 on which the flooring 3 is installed, and the fixed base 10. And a vibration isolator 30 interposed between the movable table 20 and the movable table 20.

  As shown in FIGS. 3 to 5, the fixing base 10 is substantially fixed to the upper flange 2 a by bolts 5 and nuts 6 while being placed on the upper surface of the upper flange 2 a of the floor beam 2. The fixed plate 11 has a square shape, and a substantially cylindrical rising shaft portion 12 that rises from the periphery of a substantially circular through-hole 11 a formed at the center of the fixed plate 11. The length of one side of the fixed plate 11 is about 100 mm, and the diameter of the through hole 11a is about 20 mm.

  As shown in FIGS. 3 to 5, the movable base 20 has a substantially square shape in which corners of the floor panel 4 of the flooring 3 are placed and these corners are fastened by a fastening tool (not shown). The mounting plate 21 and a hanging frame portion 22 that hangs from the periphery of a substantially circular relief hole 21 a formed in the center of the mounting plate 21 so as to surround the rising shaft portion 12 of the fixed base 10. The mounting plate 21 is formed with a plurality of fixing holes 21b... For fixing the corners of the floor panel 4 to the mounting plate 21 so as to surround the escape hole 21a. The length of one side of the mounting plate 21 is about 100 mm, and the diameter of the escape hole 21a is about 60 mm.

  In the vibration isolator 30, as shown in FIGS. 3 to 5, a plurality of metal rigid bodies 31 formed in a thin cylindrical shape having the same length in the central axis direction and different diameters, and the central axis A plurality of rubber elastic bodies 32, which are formed in a thin cylindrical shape having the same direction length and different diameters, are laminated and integrated alternately and concentrically with their central axes along the vertical direction. Yes. Further, the upper ends of the cylindrical elastic bodies 32 are integrally connected by a substantially annular upper surface elastic body 33, and the upper ends of the cylindrical rigid bodies 31 are covered by the upper surface elastic body 33, The lower ends of the cylindrical elastic bodies 32... Are integrally connected by a substantially annular lower elastic body 34, and the lower ends of the cylindrical rigid bodies 31.

  That is, the vibration isolator 30 is formed in a substantially short cylindrical shape whose outer surface is covered with elastic bodies 32 to 34, and a central hole portion 35 is formed through the center portion in the vertical direction. Inside, a plurality of cylindrical rigid bodies 31 along the vertical direction are embedded in the horizontal direction (radial direction) at intervals.

  Then, the inner peripheral surface of the central hole portion 35 of the vibration isolator 30 is bonded and fixed to the outer peripheral surface of the rising shaft portion 12 of the fixed base 10 and the outer peripheral surface of the vibration isolator 30 is fixed to the hanging frame portion of the movable base 20. The vibration isolator 30 is interposed between the rising shaft portion 12 and the hanging frame portion 22 so that the movable base 20 can move up and down with respect to the fixed base 10. It is supported by vibration. In this interposed state, the upper end of the inner peripheral surface of the central hole 35 in the vibration isolator 30 is disposed near the upper end of the outer peripheral surface of the rising shaft portion 12 in the fixed base 10. The lower end of the outer peripheral surface is disposed in the vicinity of the lower end of the inner peripheral surface of the hanging frame portion 22 in the movable base 20.

  In the vibration isolator 1, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are as shown in FIG. 5 in an initial state before being installed on the floor, that is, before the floor material 3 is installed on the movable base 20. The central hole portion 35 is inclined upward from the inner peripheral surface toward the outer peripheral surface. That is, in the initial state before the flooring 3 is installed, the vibration isolator 30 has a state in which the outer peripheral portion is pushed upward from the inner peripheral portion (center portion) and the central portion is generally recessed. It has become.

  As a result, when the vibration isolator 1 is incorporated into the floor, that is, when the flooring 3 is installed on the movable base 20, the movable base 20 is moved down by the load of the flooring 3 as shown in FIG. 3. Thus, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are in a substantially horizontal state by pressing down the outer peripheral portion of the vibration isolator 30 that is bonded and fixed to the inner peripheral surface of the hanging frame portion 22. In this state of use, the floor panel 4 placed between the upper surface of the fixed plate 11 of the fixed base 10 and the lower end of the hanging frame portion 22 of the movable base 20 and the mounting plate 21 of the movable base 20. Between the lower surface of the fixed base 10 and the upper end of the rising shaft portion 12 of the fixed base 10, gaps L1 and L2 for allowing the movable base 20 to move up and down are secured. And the height L3 (height from the upper surface of the mounting plate 21 to the lower surface of the fixed plate 11) L3 of the vibration isolator 1 is suppressed to about 40 mm, for example.

  In the anti-vibration device 1 in use, the anti-vibration material 30 can be shear-deformed so as to cause a positional shift in the vertical direction between the inner peripheral portion and the outer peripheral portion, and is soft in the vertical direction. (It has a vibration damping function in the vertical direction), but on the other hand, the plurality of cylindrical rigid bodies 31... Since they are arranged concentrically at intervals in the horizontal direction and restrict deformation of the vibration isolator 30 in the horizontal direction, they have high rigidity in the horizontal direction.

  In the floor portion (floor structure) in which the vibration isolator 1 having the above-described configuration is incorporated, vibrations in the vertical direction accompanied by floor impact sound are generated in the floor material 3, and when the vibrations are input to the vibration isolator 1, The movable table 20 moves up and down with the shear deformation of the vibration member 30. The vibration is attenuated by the shear deformation of the vibration isolator 30 so that the floor impact sound can be reduced.

  In addition, since the vibration isolator 30 has a high rigidity that is difficult to deform in the horizontal direction as described above, the vibration isolator 1 has the floor panels 4. It is possible to bear the horizontal force by the floor material 3 and the cost can be reduced by eliminating the horizontal brace.

  Further, in the initial state before the flooring 3 is installed, the vibration isolator 1 has the upper surface 30a and the lower surface 30b of the vibration damping material 30 inclined upward from the inner peripheral part toward the outer peripheral part, and the flooring 3 is installed. In the used state, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are devised so as to be in a substantially horizontal state. In addition, an escape hole 21 a is formed in the mounting plate 21 of the movable table 20, so that the mounting plate 21 does not interfere with the rising shaft portion 12 of the fixed table 10 and the vibration isolating material 30 when the movable table 20 moves downward. It has been devised. Thereby, the height of the apparatus can be made as low as possible, and the floor level can be kept low by being compactly interposed between the floor beam 2 and the floor material 3.

  Here, the difference in height dimension between the vibration isolator 1 and the vibration isolator 50 that has not been devised as described above (the vibration isolator 50 of the comparative example) will be described with reference to FIG. FIG. 6A shows an initial state before the flooring 3 is installed, and FIG. 6B shows a use state in which the flooring 3 is installed. In the vibration isolator 50 of the comparative example, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are in a substantially horizontal state in the initial state before the floor material 3 is installed, and the use state in which the floor material 3 is installed. The upper surface 30a and the lower surface 30b of the vibration isolator 30 are inclined downward from the inner peripheral portion toward the outer peripheral portion, and no escape hole 21a is formed in the mounting plate 21 of the movable base 20. The vibration isolator 30 of the vibration isolator 1 and the vibration isolator 30 of the anti-vibration apparatus 50 of the comparative example have the same capacity.

  As shown in FIG.6 (b), in the use condition which installed the flooring 3, in the vibration isolator 1, while the upper surface 30a and the lower surface 30b of the vibration isolator 30 are in a substantially horizontal state, In the vibration isolator 50 of the comparative example, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are inclined downward from the inner peripheral portion toward the outer peripheral portion. For this reason, in the vibration isolator 50 of the comparative example, if it is intended to secure the gap L1 between the upper surface of the fixed plate 11 of the fixed base 10 and the lower end of the hanging frame portion 22 of the movable base 20, the vibration isolator 30 The fixing position of the inner peripheral portion of the fixed base 10 must be higher than that of the vibration isolator 1, and the height of the rising shaft portion 12 of the fixing base 10 is higher than that of the vibration isolator 1. Accordingly, in order to secure a gap L <b> 2 between the lower surface of the mounting plate 21 of the movable table 20 and the upper end of the rising shaft portion 12 of the fixed table 10, the height of the hanging frame portion 22 of the movable table 20. Therefore, the height position of the mounting plate 21 is higher than that of the vibration isolator 1. In addition, in the vibration isolator 1, since the escape hole 21a is formed in the placement plate 21, the placement plate 21 is placed on the placement plate 21 even if the height position of the placement plate 21 is lowered by the plate thickness. A gap L <b> 2 can be secured between the lower surface of the floor panel 4... And the upper end of the rising shaft portion 12 of the fixed base 10. For this reason, the vibration isolator 1 can be made smaller in height than the anti-vibration apparatus 50 of the comparative example in a use state in which the floor material 3 is installed, and can be incorporated into the floor portion in a compact manner. it can.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.

  1 .... Vibration isolation device 2 .... Floor beam 3 .... Floor material 10 .... Fixed base 12 ...... Rising shaft part 20 .... Movable stand 21 ...... Plate plate 21a ... Release hole , 22... Draft frame part, 30.. Antivibration material, 30 a.. Top surface of vibration isolation material, 30 b... Bottom surface of vibration isolation material, 31. ..Elastic upper surface, 34 ..Lower elastic body, 35 ..Central hole

Claims (4)

A vibration isolator (1) for a building floor interposed between a floor beam (2) and a floor material (3), comprising a lower fixing base (10) fixed to the floor beam (2) An upper movable base (20) on which the flooring (3) is installed, and a vibration isolating material (30) interposed between the fixed base (10) and the movable base (20). damping material (30), the central axis direction of the length is the same different cylindrical rigid body diameters (31 ...) and different in the central axis direction of the same diameter length a plurality of cylindrical elastic bodies ( 32 ..) are alternately laminated and integrated so that their central axes are along the vertical direction , and the outer surface is formed in a substantially short cylindrical shape covered with an elastic body (32-34), center hole portion of the vibration-proof material (30) the entire inner peripheral surface (35), as well as joined and fixed to the outer peripheral surface of the rising shaft portion of the fixing base (10) (12), said vibration proof material The entire outer peripheral surface 30), by joining fixed to the inner peripheral surface of the hanging frame portion of the movable table which surrounds the rising shaft portion (12) (20) (22), said fixed base with respect to (10) The movable base (20) is supported in a vibration-proof manner so that the movable base (20) can be moved up and down. A vibration isolator for a building floor, which is inclined upward from the inner peripheral surface of the hole (35) toward the outer peripheral surface. The movable table (20) includes a mounting plate (21) on which the flooring (3) is mounted, and the fixed table when the movable table (20) is moved downward on the mounting plate (21). An escape hole (21a) for avoiding interference with the rising shaft portion (12) of (10) and the vibration isolator (30) is formed, and from around the escape hole (21a) of the mounting plate (21). The vibration isolator for a building floor according to claim 1, wherein the hanging frame part (22) is suspended. The upper ends of the cylindrical elastic bodies (32...) Are integrally connected by the upper surface elastic body (33), and the upper ends of the cylindrical rigid bodies (31...) Are connected to the upper surface elastic body (33). And the lower ends of the cylindrical elastic bodies (32) are integrally connected by the lower elastic body (34), and the lower ends of the cylindrical rigid bodies (31,. The vibration isolator for a building floor according to claim 1 or 2, wherein the elastic body (34) covers the building floor. A floor structure of a building, characterized in that the vibration isolator (1) according to any one of claims 1 to 3 is interposed between a floor beam (2) and a floor material (3).