JP5128971B2 - Floor support vibration absorber and floor structure - Google Patents

Description

  The present invention relates to a floor-supported vibration absorber that supports a floor material of a double floor, and a floor structure using the floor-supported vibration absorber.

  In the floor structure, there is a case where a double floor structure is provided in which a floor is provided at a predetermined height from the floor base via a support member in order to improve the performance of blocking floor impact sound. In such a double floor structure, for example, as disclosed in Patent Document 1, a technique for attenuating vibration from a floor using an elastic body and a mass body is disclosed.

According to the floor structure described in Patent Document 1, vibration from the floor can be effectively damped. However, in the floor support of Patent Document 1, since the first elastic member and the second elastic member are arranged in series, the height of the floor support becomes high, and there is a limit to dealing with a low floor. .
JP 2007-04-0093 A

  The present invention has been made in consideration of the above-mentioned facts, and provides a floor-supporting vibration damping device and a floor structure that can be applied to a low floor while having a good floor impact sound blocking performance. Is an issue.

The floor-supporting vibration absorber of the present invention described in claim 1 is supported on a floor slab, is elastically deformable and damps vibrations, is supported on the first elastic member, and the floor A support member for supporting a flooring disposed at a distance from the slab; and a second member that is attached to the lower surface of the flooring at a position spaced from the support member to form a hollow space and is elastically deformable. An elastic member, and a mass body that is attached so as to apply a tensile force to the second elastic member and that is displaced by elastic deformation of the second elastic member to damp vibrations, and the second elastic member is a cylinder. The cylinder axis direction is arranged along the lower surface of the flooring .

  According to the floor support vibration damping device described in claim 1, when vibration is applied to the floor material, the vibration is transmitted to the second elastic member. Thus, the vibration from the floor material to the floor slab is attenuated by the second elastic member moving up and down so that the mass body absorbs vibration by elastic deformation. The damped vibration is further damped by the first elastic member and transmitted to the floor slab, so that the floor impact sound is well cut off.

  Further, since the second elastic member is attached to the lower surface of the flooring at a position separated from the support member, the second elastic member and the first elastic member can be arranged in parallel, and the floor support vibration absorber Can be reduced in height.

  Moreover, since the hollow space is comprised in the 2nd elastic member, the spring constant of a 2nd elastic member can be easily adjusted by changing the magnitude | size of this hollow space, or changing length and thickness. it can.

Further, in the floor supporting vibration absorber, the second elastic member has a cylindrical shape, and the cylinder axis direction is disposed along the lower surface of the floor material .

  Thus, the hollow space can be easily configured by forming the second elastic member in a cylindrical shape and making the hollow of the cylinder a hollow space.

The floor-supporting vibration absorber described in claim 2 is characterized in that the mass body is disposed in the hollow space of the second elastic body.

  Thus, by arranging the mass body in the hollow space, it is possible to prevent interference between the mass body and a member arranged under the floor such as a pipe.

A floor structure according to a third aspect includes a floor slab, a floor material disposed with a space from the floor slab, and the floor support vibration absorber according to the first or second aspect .

  According to the floor structure of the present invention, even when the distance between the floor slab and the flooring is short, the floor impact sound can be satisfactorily blocked by the floor support vibration absorber.

  As described above, according to the floor supporting vibration absorbing device and the floor structure of the present invention, the floor impact sound blocking performance can be improved and applied to a low floor.

  [First Embodiment]

  An embodiment of a floor support vibration absorber according to the present invention and a floor structure to which the floor support vibration absorber is applied will be described with reference to the drawings. In addition, arrow UP in a figure shows the upward direction in a floor structure.

  A floor structure 10 shown in FIG. 1 is a double floor (dry sound insulation double floor) structure mainly used in an apartment house, and a floor impact sound (walking sound, object) that is emitted from the upper floor and propagates downward. This is a structure for reducing falling sounds of children, jumping of children, and the like.

  (Floor structure and floor support vibration absorber configuration)

  As shown in FIG. 1, a floor structure 10 includes a floor support 16 arranged in a plurality at a predetermined interval between a concrete floor slab 12 and an upper floor material 14 serving as a frame, and a dynamic vibration absorber. The sound absorber 30 is interposed, and a space is formed between the floor slab 12 and the upper floor material 14 by the floor support dynamic vibration absorber 28 including the floor support 16 and the dynamic vibration absorber 30. Is in a state of getting.

Note that the upper flooring 14 of the present embodiment has a laminated structure in which a base panel 14A is provided, a scraping material 14B is provided on the base panel 14A, and a finishing material 14C is further provided thereon. Here, the upper floor material 14 (the base panel 14A and the stripping material 14B) excluding the finishing material 14C, the floor support 16, and the dynamic vibration absorber 30 are the floor base materials.
In addition, the discarding material 14B is not necessarily required, and may be configured without the discarding material 14B.

  FIG. 2 shows a layout of the base panel 14A, the floor support 16 and the dynamic vibration absorber 30. Each of the base panels 14A is laid so that a gap having a predetermined interval (hereinafter referred to as “joint M”) is formed. The joint M is set to an interval of about 10 mm to 20 mm in order to prevent a squeaking sound due to contact between the base panels 14A. The floor support 16 is disposed so as to straddle the joint M. As shown in FIG. 2 (A), the dynamic vibration absorber 30 may be disposed at a predetermined interval in the middle portion of the floor support portion 16 at the center portion in the short direction of the base panel 14A. As shown in FIG. 4, the both ends in the short direction may be arranged in the vicinity of the floor support 16 at a predetermined interval.

  As shown in FIG. 3, the floor support 16 includes a cushion rubber 18 as a first elastic member, a support bolt 22 as a support member, and a support panel 15.

  The cushion rubber 18 is disposed on the floor slab 12. The cushion rubber 18 has a cylindrical shape, and is supported on the floor slab 12 in order to attenuate the vibration from the upper floor material 14, and can be elastically deformed.

  On the cushion rubber 18, a support bolt 22 is supported in an upright state via an intermediate receiving member 20 as an intermediate receiving portion. The intermediate receiving member 20 has a cylindrical shape and is provided with a flange portion 20A in the intermediate portion. One side of the cylindrical portion is inserted into the cylinder inside of the cushion rubber 18 and is directed to the lower surface of the flange portion 20A (to the cushion rubber 18 side). Surface) is fixed to the upper surface of the cushion rubber 18 (the surface opposite to the surface on the floor slab 12 side). A female screw portion 20B is formed on the inner peripheral surface of the cylindrical portion of the intermediate receiving member 20, and a male screw portion 22A formed on the shaft portion of the support bolt 22 is screwed into the female screw portion 20B. Thereby, the intermediate receiving member 20 is integrated with the support bolt 22.

  Under the base panel 14A, a support panel 15 is disposed across the joint M at predetermined intervals so as to support the base panel 14A. The support panel 15 has a square plate shape, and an adjustment hole 15A is formed at the center.

  The support bolt 22 extends in the opposite direction to the cushion rubber 18, that is, in the direction opposite to the floor slab 12, and the upper end portion is attached to the adjustment hole 15 </ b> A of the support panel 15. The support bolts 22 are configured to support the upper flooring 14 via the support panel 15. The panel receiving member 24 includes a cylindrical cylindrical portion 24B and a flange portion 24A protruding outward from one opening of the cylindrical portion 24B. The cylindrical portion 24B of the panel receiving member 24 is inserted and fixed in the adjustment hole 15A of the support panel 15, and the upper surface (surface directed toward the upper flooring 14) of the flange portion 24A is the lower surface (floor slab) of the support panel 15. 12). A female screw portion 24C is formed on the inner peripheral surface of the cylindrical portion of the panel receiving member 24, and a male screw portion 22B formed on the shaft portion of the support bolt 22 is screwed into the female screw portion 24C. Thus, the upper flooring 14 is disposed with a space between the floor slab 12.

  A concave portion (not shown) for inserting a flathead screwdriver is formed at the tip of the support bolt 22, and in a state before the stripping material 14 </ b> B and the finishing material 14 </ b> C are laid on the base panel 14 </ b> A of the upper floor material 14. The height of the base panel 14A from the floor slab 12 can be adjusted by inserting a flathead screwdriver into a recess (not shown) of the support bolt 22 and rotating the support bolt 22.

  As shown in FIGS. 3 and 4, the dynamic vibration absorber 30 includes a second elastic member 32 and a mass body 40. The second elastic member 32 includes a cylindrical tube portion 34 and a flat flange portion 36. The cylindrical portion 34 and the flange portion 36 are integrally formed, the outer peripheral surface of the cylindrical portion 34 is disposed at the center of the plate surface of the flange portion 36, and the flange portion 36 is perpendicular to the cylindrical axis of the cylindrical portion 34. It is extended to. A hollow space R <b> 1 is formed inside the cylindrical portion 34.

  As for the 2nd elastic member 32, the board surface of the side by which the cylinder part 34 of the flange part 36 is not arrange | positioned is attached to the lower surface of 14 A of base panels. The attachment is performed by arranging two flange plates 38 on the lower surface of the flange portion 36 and screwing screws 37 from the lower side of the flange plate 38 to the base panel 14A. Thereby, the cylinder part 34 of the 2nd elastic member 32 is arrange | positioned so that a cylinder axis may follow the lower surface of 14 A of base panels.

  The second elastic member 32 can be made of rubber, urethane, resin, or the like. In the present embodiment, the spring constant can be easily adjusted by adjusting the size of the hollow space R1, the thickness of the cylindrical portion 34, and the length of the cylindrical portion 34. The second elastic member 32 may be reinforced by inserting a reinforcing member such as a canvas.

  A mass body 40 is disposed in the hollow space R1 of the cylindrical portion 34 of the second elastic member 32. The mass body 40 has a rectangular parallelepiped shape, and the longitudinal direction is arranged along the cylinder axis direction of the cylinder portion 34. The mass body 40 can be made of metal. The mass body 40 is attached by disposing the mass body plate 42 below the cylindrical portion 34 and screwing the screw 43 from the lower side of the mass body plate 42 to the mass body 40. A washer may be used instead of the mass plate 42. Thereby, a tensile force is applied to the second elastic member 32 downward in the vertical direction. If a material having a high specific gravity is used as the mass body 40, the mass body 40 can be configured compactly. The mass body 40 can be made of a material such as FRP, steel, metal, water, sand, ceramic, or resin.

  The mass body 40 moves up and down so as to absorb the vibration from the second elastic member 32, thereby attenuating the vibration from the upper floor material 14 to the floor slab. A predetermined clearance C is formed between the dynamic vibration absorber 30 and the floor slab 12, so that even when the mass body 40 vibrates up and down, its lower end does not come into contact with the floor slab 12. .

  Moreover, since the mass body 40 is accommodated in the cylinder part 34, piping under the floor etc. and the mass body 40 do not contact directly, and the sound (metal sound) produced when metals collide is prevented. can do.

  (Function)

  Next, the operation of the above embodiment will be described.

  The vibration of floor impact sound (for example, walking sound) generated on the upper floor is transmitted from the upper floor material 14 to the cushion rubber 18 via the support panel 15, the support bolt 22, and the intermediate receiving member 20. It is transmitted to the floor slab 12 while being attenuated. At this time, the mass body 40 of the dynamic vibration absorber 30 vibrates in the vertical direction so as to cancel the vibration of the upper floor material 14 via the second elastic member 32. Thereby, the vibration transmitted to the cushion rubber 18 is attenuated, and the vibration transmitted from the upper floor material 14 to the floor slab 12 can be reduced.

  In the present embodiment, since the dynamic vibration absorber 30 is disposed separately from the floor support 16, the floor vibration is reduced compared to the case where the dynamic vibration absorber 30 is disposed in series with the floor support 16. The height of the vibration absorber 28 can be reduced. Therefore, it can also be installed on a low floor where the distance between the lower surface of the upper flooring 14 and the floor slab 12 is short.

  Moreover, in this embodiment, since the mass body 40 is accommodated in the cylinder part 34 of the 2nd elastic member 32, it can prevent that piping under the floor etc. and the mass body 40 contact directly.

  In the present embodiment, the cylindrical portion 34 of the second elastic member 32 is cylindrical. However, as shown in FIGS. 5 and 6, a hexagonal cylindrical portion 35 or other corners may be used. It can also be a cylindrical shape. In this case, the mass body 40 is arranged on the inner side of one surface constituting the square tube. The mass body 40 can be attached by disposing the mass body plate 42 below the rectangular tube portion 35 and screwing the screw 43 from the lower side of the mass body plate 42 to the mass body 40.

Moreover, in this embodiment, although the mass body 40 has been arrange | positioned in the hollow space R1, as shown in FIG.7 and FIG.8, the mass body 40 can also be arrange | positioned on the outer side of the cylinder part 34. FIG. In this case, the mass body 42 is disposed in the hollow space R1, and the mass body 40 is held by screwing the screw 43 from below into the mass body plate through the mass body 40 and the cylindrical portion 34. Can do.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The floor structure 60 of this embodiment is the same as that of the first embodiment except for the configuration of the dynamic vibration absorber.

  The floor structure 60 of the present embodiment includes the floor support 16 and the dynamic vibration absorber 70.

  As shown in FIGS. 9 and 10, the dynamic vibration absorber 70 includes a second elastic member 72 and a mass body 80. The second elastic member 72 includes a cylindrical tube portion 74 and a flange portion 76. The tube portion 74 and the flange portion 76 are integrally formed, and the flange portion 76 extends from the tube portion 74 in the tube axis direction of the tube portion 74. A hollow space R <b> 2 is formed in the cylindrical portion 76.

  The cylindrical portion 74 is formed with an upper flat portion 74A and a lower flat portion 74B at positions facing each other. The second elastic member 72 has an upper flat portion 74A attached to the lower surface of the base panel 14A. The plate-like flange plate 78 is arranged on the lower surface of the flange portion 76 and the inner wall of the cylindrical portion 74 along the upper flat portion 74A, and the screw 77 is screwed from the hollow space R2 to the base panel 14A. Yes. Thereby, the cylinder part 74 of the 2nd elastic member 72 is arrange | positioned so that a cylinder axis may follow the lower surface of 14 A of base panels.

  The second elastic member 72 can also be made of rubber, urethane, resin, or the like. In the present embodiment, the spring constant can be easily adjusted by adjusting the size of the hollow space R2, the thickness of the cylindrical portion 74, and the length of the cylindrical portion 74.

  A mass body 80 is disposed below the cylindrical portion 34 of the second elastic member 32, that is, below the lower flat portion 74B. The mass body 80 has a rectangular parallelepiped shape, and the longitudinal direction is arranged along the cylinder axis direction of the cylinder portion 74. The mass body 80 is attached by placing the mass body plate 82 above the lower flat portion 74B of the cylindrical portion 74 (in the hollow space R2) and screwing the screw 83 from the lower side of the mass body 40 until the mass body plate 82 is inserted. Has been done. Accordingly, a tensile force is applied to the second elastic member 72 downward in the vertical direction.

  Also in the present embodiment, as in the first embodiment, the vibration of the floor impact sound generated on the upper floor is transferred from the upper floor material 14 to the cushion rubber 18 via the support panel 15, the support bolt 22, and the intermediate receiving member 20. It is transmitted to the floor slab while being attenuated by the cushion rubber 18. At this time, the mass body 80 of the dynamic vibration absorber 70 vibrates in the vertical direction so as to cancel the vibration of the upper flooring 14 via the second elastic member 72. Thereby, the vibration transmitted to the cushion rubber 18 is attenuated, and the vibration transmitted from the upper floor material 14 to the floor slab 12 can be reduced.

  In addition, as shown in FIG. 11, a reinforcing cloth 90 may be embedded in the cylindrical portion 74 of the second elastic member 72 in the circumferential direction. By using the reinforcing cloth 90, creep deformation of the rubber cylinder 74 can be suppressed.

  Further, in the first embodiment, the mass body is arranged inside the cylinder portion, and in the second embodiment, the mass body is arranged outside the cylinder portion. However, as shown in FIG. You may arrange | position so that it may wrap in the member which comprises the part 92. FIG. In this way, by covering the mass body 90 with the cylindrical portion 92, it is possible to prevent the mass body 91 from interfering with piping under the floor or the like.

It is sectional drawing which shows the longitudinal cross-section of the floor structure and floor support which concern on 1st Embodiment. It is a top view which shows arrangement | positioning of the ground panel of a floor structure and floor support dynamic vibration absorber which concern on 1st Embodiment. It is sectional drawing of the floor support tool and dynamic vibration absorber which concern on 1st Embodiment. It is a perspective view of the dynamic vibration absorber which concerns on 1st Embodiment. It is sectional drawing of the modification of the dynamic vibration damper which concerns on 1st Embodiment. It is a perspective view of the modification of the dynamic vibration damper which concerns on 1st Embodiment. It is sectional drawing of the other modification of the dynamic vibration damper which concerns on 1st Embodiment. It is a perspective view of the other modification of the dynamic vibration damper which concerns on 1st Embodiment. (A) of the dynamic vibration damper which concerns on 2nd Embodiment is sectional drawing, (B) is a side view. It is a perspective view of the dynamic vibration damper which concerns on 2nd Embodiment. It is sectional drawing of the other modification of the dynamic vibration damper which concerns on 2nd Embodiment. It is sectional drawing of the other modification of the dynamic vibration damper which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Floor structure 12 Floor slab 14A Base panel 14 Upper floor material 15 Support panel 16 Floor support tool 18 Cushion rubber 22 Support bolt 28 Floor support dynamic vibration absorber 30 Dynamic vibration absorber 32 2nd elastic member 34 Tube part 35 Square tube part 40 Mass body 60 Floor structure 70 Dynamic vibration absorber 72 Elastic member 74 Tube portion 76 Tube portion 80 Mass body 91 Mass body 92 Tube portion R1 Hollow space R2 Hollow space

Claims (3)

A first elastic member supported on the floor slab and elastically deformable to damp vibrations;
A support member that is supported on the first elastic member and supports a flooring that is disposed with a gap between the floor slab;
A second elastic member attached to the lower surface of the flooring at a position separated from the support member, forming a hollow space, and being elastically deformable;
A mass body that is attached so as to apply a tensile force to the second elastic member, and that is displaced by elastic deformation of the second elastic member to attenuate vibrations;
Equipped with a,
The floor supporting vibration absorber , wherein the second elastic member has a cylindrical shape and a cylinder axis direction is disposed along a lower surface of the floor material . The floor support vibration absorber according to claim 1 , wherein the mass body is disposed in the hollow space of the second elastic body. Floor slabs,
A flooring disposed at an interval from the floor slab;
The floor-supporting vibration absorber according to claim 1 or 2 ,
With floor structure.

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