JP5919053B2 - Sound insulation structure of floor - Google Patents

Description

  The present invention relates to a sound insulation structure for a floor provided between floor beams arranged with a gap, and a sound insulation member used therefor.

  Patent Document 1 discloses a sound insulation structure for a floor in which the lower surface of a floor panel is covered with a thin sound insulation sheet such as a lead sheet or a rubber sheet so that sound generated on the upper floor is difficult to propagate to the lower floor.

  Also, when building a unit building by stacking multiple building units manufactured at the factory vertically and horizontally, between the floor beam and ceiling beam of the building unit stacked vertically or between the columns of building units adjacent to the left and right It is known that an anti-vibration member is interposed in (see Patent Documents 2 and 3, etc.).

  In the unit buildings described in these documents, in order to suppress the vibration generated by the bending of floor beams and columns, a vibration isolating member having a steel plate or a laminated structure of rubber and steel plates is interposed between the beams and the columns. , Trying to suppress the occurrence of vibration.

  On the other hand, Patent Document 4 discloses a unit building in which a building area can be expanded beyond the limit of multiples of building units by connecting the building units with a space for adjusting the layout.

JP 2000-110289 A Japanese Patent Publication No. 6-15785 JP 2002-194817 A JP 2009-174247 A

  However, the sound insulation structure of the floor disclosed in Patent Document 1 attaches a sound insulation sheet to the lower surface of the floor joists, and cannot be provided between floor beams where the floor joists are not arranged.

  In addition, the unit buildings disclosed in Patent Documents 2 and 3 are constructed close to each other without providing a substantial gap between the building units, and a structure in which a vibration isolating member is disposed around the slight gap is disclosed. It has only been done. On the other hand, there is no prior art document describing a configuration in which a vibration isolation member is arranged in a unit building in which a clearance for floor plan adjustment as disclosed in Patent Document 4 is formed.

  Accordingly, an object of the present invention is to provide a sound insulation structure for a floor that can be provided between floor beams arranged with a gap, and a sound insulation member used for the structure.

  In order to achieve the above object, the sound insulation structure for floors of the present invention is a sound insulation structure for floors provided between floor beams arranged with a gap, and is provided with a space in the beam axis direction between the floor beams. It is characterized by comprising a supporting material to be delivered and a planar damping material attached to the lower surface of the supporting material and disposed between the floor beams.

  Here, the support material may be a wooden cross that is bridged in a direction perpendicular to the beam axis of the floor beam. Moreover, it is preferable that the said support material is arrange | positioned at a space | interval shorter than the space | interval of the floor beam crossed over the said floor beam.

  Furthermore, a sound absorbing material can be disposed below the planar damping material. Further, the planar vibration damping material is a high specific gravity asphalt mat and can have a thickness of 18 mm or more.

  Furthermore, it is possible to make discontinuity between the side surface of the floor beam and the side surface of the planar damping material. The floor beam may be a floor beam of a building unit.

  Furthermore, the sound insulating member of the present invention includes wooden bars arranged in parallel at intervals, and a planar vibration damping material attached so that both ends of the wooden bars protrude from the lower surface of the wooden bars. It is characterized by that.

  The sound insulation structure for a floor according to the present invention configured as described above includes a support member spanned between floor beams and a planar vibration damping member attached to the lower surface thereof. For this reason, a planar damping material can also be arrange | positioned also between the floor beams in which floor joists etc. are not arrange | positioned, and it can be set as a sound-insulation structure.

  In addition, if the support member is a wooden cross that is bridged in a direction perpendicular to the beam axis of the floor beam, it can be easily procured using a square member or the like. Furthermore, sound insulation performance can be improved by shortening the space | interval which arrange | positions a support material.

  Also, the sound insulation performance can be enhanced by disposing a sound absorbing material such as glass wool below the planar damping material. Furthermore, the sound insulation performance can also be improved by using a relatively thick high specific gravity asphalt mat as the planar vibration damping material.

  Also, by making the gap discontinuous by providing a minute gap between the side of the floor beam and the side of the planar damping material, the entire load of the planar damping material can be applied to the support material. As a result, the damping effect is effectively expressed.

  And also when the clearance for floor plan adjustment is provided between building units, a sound-insulating structure can be provided between the building units.

It is sectional drawing explaining the structure of the sound insulation structure of the floor of embodiment of this invention. It is a figure explaining the structure of a sound insulation member, Comprising: (a) is a perspective view, (b) is sectional drawing. It is a perspective view explaining the structure of a building unit. It is a top view of the first floor for demonstrating the clearance gap between building units. It is a top view explaining the structure which has arrange | positioned several sound insulation members in the clearance gap between building units. It is sectional drawing explaining the structure of a vibration proof joint. It is the figure which showed the experimental result for demonstrating that sound insulation performance changes with the space | interval of the wooden cross of a sound insulation member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view for explaining the structure of a floor sound insulation structure according to the present embodiment, FIG. 2 is a view explaining the structure of a sound insulation member 2, and FIG. 3 is a building unit 1 constituting a unit building. FIG. 4 is a perspective view and FIG. 4 is a plan view of the first floor for explaining the gap 101 between the building units 1A and 1B.

  First, the structure of a unit building will be described with reference to FIGS. 3 and 4. Such a unit building is configured by transporting a plurality of building units 1, 1A, 1B manufactured at a factory to a site and arranging them in a horizontal direction. While constructing a floor, an upper floor is constructed by stacking another (upper floor) building unit 1 on those (lower floor) building units 1A, 1B.

  Among the unit buildings constructed by arranging a plurality of building units 1 adjacent to each other vertically and horizontally in this way, the surroundings of the building units 1A and 1B arranged adjacent to the clearance 101 for floor plan adjustment are viewed from above. FIG. 4 is a plan view.

  The gap 101 is formed with a width of about 20-30 cm, and is generally wider than a gap of several mm to several tens of mm that is generated when the building units 1 and 1 are adjacent to each other on the left and right. .

  And the building unit 1 (1A, 1B) which comprises a unit building, as shown in FIG. 3, the pillar 11, ... as a pillar material arrange | positioned at four corners, and the lower end of the pillar 11, ... .. Are formed in a box shape by floor beams 12, 12A,... As beams passed between them and ceiling beams 13, 13A,. It is formed into a ramen structure (framework structure).

  Here, the column 11 is formed of a square steel pipe, the floor beam 12 and the ceiling beam 13 are formed of a U-shaped groove steel material, and the column 11, the floor beam 12 (12A), and the ceiling beam 13 (13A) are joined to each other. It is joined via the material 14.

  Further, ceiling joists 16,... Are bridged between the ceiling beams 13 and 13 in parallel, and a ceiling plate 18 is attached to the lower surface of the ceiling joists 16,. Further, between the floor beams 12, 12, the floor beam 15,... Is passed in parallel, and the floor plate 17 is attached to the upper surface of the floor beam 15,. Here, the floor beam 15 is fixed to the floor beam 12 via a mounting bracket 15a as shown in FIGS.

  As shown in FIG. 4, connecting members 5 and 5 that connect the building units 1 </ b> A and 1 </ b> B are arranged in the clearance 101 for adjusting the floor plan. The connecting member 5 is disposed between the facing ceiling beams 13 and 13 in the vicinity of the joint portion between the column 11 and the ceiling beam 13.

  Specifically, since the connecting member 5 is bridged between the joint frame members 14 and 14 facing the gap 101, the longitudinal length of the ceiling beam 13 is formed in the gap 101 between the pair of building units 1A and 1B arranged side by side. The connecting members 5 and 5 are arranged at two locations near both ends in the direction (beam axis direction). A space is formed between the connecting members 5 and 5 along the longitudinal direction of the ceiling beam 13.

  The connecting member 5 is mainly configured by, for example, a U-shaped groove-shaped steel material and a pair of end plates formed by a steel plate so as to close the openings on both sides of the groove-shaped steel material. Then, the end plate of the connecting member 5 is joined to the joining frame member 14 and the ceiling beam 13 using bolts.

  Further, as shown in FIG. 4, vibration-proof plates 3 and 3 as flat plate-type vibration-proof members are arranged at substantially the center in the longitudinal direction of the ceiling beams 13 and 13 on both sides of the gap 101.

  The vibration-proof plate 3 can be a steel plate such as a general structural rolled steel, a laminated plate of a steel plate and a viscoelastic body, or the like. For the viscoelastic body of the laminate, materials such as rubber, asphalt, silicon and acrylic can be used.

  Further, as shown in FIG. 1, the vibration isolating plate 3 is interposed between the upper surface of the ceiling beam 13 of the first floor building unit 1A (1B) and the lower surface of the floor beam 12 of the second floor building unit 1. .

  This anti-vibration plate 3 is a strip having a width approximately equal to the width of the flange that forms the upper surface of the ceiling beam 13, and is disposed in the gap between the ceiling beam 13 and the floor beam 12 stacked vertically, It is not arranged in the gap 101.

  Next, the sound insulation member 2 will be described with reference to FIG. As shown in FIG. 2 (a), the sound insulating member 2 is provided with wooden bars 21,... As support members arranged in parallel at intervals, and on the lower surfaces of the wooden bars 21,. It is mainly comprised by the damping mat | matte 22 as a planar damping material to be attached.

  As shown in FIG. 1, when the wooden bridge 21 is bridged between the floor beams 12 and 12 in the direction orthogonal to the beam axis of the floor beam 12, both ends 21 a and 21 a of the floor beams 12 and 12 are formed. This is a quadrangular prism-shaped wood molded to a length that is placed on the upper surface.

  On the other hand, the damping mat 22 is a plate-like member having a width slightly narrower than the gap 101 between the floor beams 12 and 12. Therefore, both end portions 21 a and 21 a of the wooden crosspiece 21 are projected from the side of the vibration damping mat 22.

As the vibration damping mat 22, a synthetic resin mat such as an asphalt mat, a rubber mat, a lead mat or the like can be used. In particular, it is preferable to use a high specific gravity asphalt mat having a surface density of 4.7 kg / m ² or more and a thickness of 18 mm or more as the damping mat 22.

  Further, as shown in FIG. 2B, the vibration damping mat 22 is fixed to the wooden crosspiece 21 using screws 23. In this way, the sound insulation member 2 in which the plurality of wooden crosspieces 21... And the rectangular damping mat 22 are integrated is formed.

  Then, as shown in FIG. 5, a plurality of sound insulation members 2,... Are arranged in the gap 101 between the building units 1A and 1B. The sound insulation member 2 is disposed so as to block the entire length of the gap 101 on both sides of the vibration isolation joint 4.

  As shown in FIG. 6, the anti-vibration joint 4 includes an upper surface portion 41 spanned between the upper surfaces of the floor beams 12 and 12 on both sides sandwiching the gap 101, and the ceiling beams 13 and 13 on both sides sandwiching the gap 101. It mainly has a lower surface portion 42 that is interposed between the lower surfaces, and a connection portion 43 that connects the upper surface portion 41 and the lower surface portion 42 in the gap 101.

  The upper surface portion 41 of the anti-vibration joint 4 is mainly configured by a strip-like bottom plate portion 41b and reinforcing ribs 41a and 41a that protrude in a wall shape upward from both side edges of the bottom plate portion 41b.

  The bottom plate portion 41b is formed to have a length obtained by adding the width of the gap 101 to the width of the flanges of the floor beams 12 and 12 on both sides thereof. The upper surface portion 41 is fixed to the floor beam 12 by screwing and tightening a drill screw 41c.

  On the other hand, the lower surface portion 42 includes a strip plate 42a in which a steel plate or the like is formed into a rectangular shape whose projection shape in the vertical direction substantially coincides with the bottom plate portion 41b, and a butyl tape 42b attached to both ends in the longitudinal direction of the strip plate 42a, 42b.

  The butyl tape 42b is a vulcanized rubber sheet having adhesiveness on both sides, and has a function of bringing the lower surface portion 42 into close contact with the lower surface (lower flange) of the ceiling beam 13 and a function as a shock absorbing material for absorbing vibration. doing.

  Further, a long bolt 43 a as a connection portion 43 is attached to the approximate center of the lower surface portion 42. The long bolt 43 a has a tip inserted through a hole in the upper surface portion 41. And a washer and a nut 43b are attached to the thread groove of the long bolt 43a protruding upward from the bottom plate portion 41b.

  When the nut 43 b is tightened, the upper surface portion 41 is pressed against the floor beams 12 and 12, and the lower surface portion 42 is pressed against the ceiling beams 13 and 13. That is, the vibration-proofing plates 3 and 3 arranged around the gap 101 are connected by the vibration-proofing joint 4 so as to change integrally.

  And the floor board 17 is laid as shown in FIG. 1 above the clearance gap 101 obstruct | occluded by the some sound-insulation member 2, .... Under the floor plate 17, a damping sheet 17a and a base plate 17b are laid.

  As the vibration damping sheet 17a, a synthetic resin sheet such as an asphalt sheet, a rubber sheet, or a lead sheet can be used. The vibration damping sheet 17a is a thin sheet of about 6 mm. Further, as the base plate 17b, a wood board such as a particle board, an oriented strand board (OSB), or a plywood can be used.

  Further, as shown in FIG. 1, the side surface of the damping mat 22 and the side surface facing the gap 101 of the floor beam 12 are slightly separated. That is, the side surfaces on both sides of the vibration damping mat 22 are not in contact with the opposing floor beams 12 and 12 and are discontinuous.

  Further, as shown in FIG. 1, a sound absorbing material 24 is disposed below the sound insulating member 2 in the gap 101. For the sound absorbing material 24, synthetic resin foam such as glass wool and polystyrene foam can be used.

  On the other hand, above the ceiling board 18 made of gypsum board or the like, the bridge 101 is bridged in the gap 101, the ceiling joist 16 is bridged between the ceiling beams 13 and 13 of each building unit 1A (1B), and the glass wool 18b. , 18c are laid down.

  Next, the effect | action of the sound insulation structure of the floor of this Embodiment is demonstrated.

  The floor sound insulation structure of the present embodiment configured as described above has a plurality of wooden crosspieces 21 spanned between the floor beams 12 and 12 of the building units 1A and 1B installed with the gap 101 interposed therebetween. And a damping mat 22 attached to the lower surface thereof.

  For this reason, it is possible to provide a sound insulation structure by disposing the damping mat 22 between the floor beams 12 and 12 where the floor joists are not disposed. That is, even when the floor space adjustment gap 101 is provided between the building units 1A and 1B, a sound insulation structure can be provided between the building units 1A and 1B.

  Moreover, if the wooden crosspiece 21 bridge | crossed toward the beam axis orthogonal direction of the floor beam 12 is used, it can procure easily with a square material etc.

  FIG. 7 shows the results of experiments conducted on sound insulation performance for the floor sound insulation structure of the present embodiment. Curve S1 shows the experimental results when the distance between the wooden beams 21 and 21 is half the distance between the floor beams 15 (225 mm interval), and the curve S2 shows the distance between the wooden beams 21 and 21 between the floor beams 15. It shows the experimental results when the same as (450mm interval).

  The experiment was conducted on a heavy floor impact sound, which indicates the impact sound generated on the lower floor when a child jumps or runs around. Specifically, impact sound was generated by a heavy floor impact sound generator (bounding machine) installed on the upper floor, and the sound pressure level was measured with a microphone installed on the lower floor.

  From the result of FIG. 7, it can be seen that the sound insulation performance can be improved by shortening the interval between the wooden crosspieces 21 and 21. It is considered that the resonance of the base plate 17b can be suppressed by shortening the interval between the wooden crosspieces 21 and 21.

  Also, the sound insulation performance can be enhanced by disposing the sound absorbing material 24 such as glass wool below the vibration damping mat 22.

  Furthermore, the use of a relatively thick (18 mm or more), high specific gravity asphalt mat as the vibration damping mat 22 can also improve the sound insulation performance. It is considered that the use of the high specific gravity asphalt mat increases the effect of suppressing the vibration of the wooden crosspieces 21.

  Further, by making the gap discontinuous by providing a minute gap between the side surface of the floor beam 12 and the side surface of the vibration damping mat 22, all of the load of the vibration damping mat 22 is transferred to the wooden crosspieces 21,. Now, the vibration of the wooden crosspieces 21... Is suppressed.

  And being able to suppress the vibration of the wooden crosspieces 21,... Can also suppress the vibration of the floor plate 17 connected to the wooden crosspiece 21,.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the above-described embodiment, the case where the sound insulation structure is provided in the gap 101 for adjusting the floor space between the building units 1A and 1B has been described. However, the present invention is not limited to this, and the floor of a normal building that is not a unit building. The sound insulation structure of the present invention can also be applied to a gap opened between beams.

  Further, in the above-described embodiment, the case where the wooden crosspiece 21 oriented in the direction perpendicular to the beam axis is used as the support material has been described, but the present invention is not limited to this. Also, a wide support material such as a strip may be used.

1, 1A, 1B Building unit 101 Clearance 12 Floor beam 15 Floor beam 2 Sound insulation member 21 Wooden cross (support material)
21a End 22 Damping mat (planar damping material)
24 Sound absorbing material

Claims (8)

It is a sound insulation structure of a floor provided between floor beams arranged with a gap,
A support material spanned between the floor beams at intervals in the beam axis direction;
Attached to a lower surface of their supporting members, and a deployed planar damping material to the floor Harima,
The sound insulation structure for a floor, wherein the support members are arranged at an interval shorter than an interval between the floor beams placed between the floor beams . A floor sound insulation structure provided between floor beams between building units arranged with a gap between them,
A support material spanned between the floor beams at intervals in the beam axis direction;
A planar damping material disposed between the floor beams, attached to the lower surface of the support material,
Both ends of the support material are placed on the upper surface of the floor beam, and a side surface of the floor beam and a side surface of the planar vibration damping material are spaced apart from each other. Sound insulation structure. The floor sound-insulating structure according to claim 1 or 2 , wherein the support member is a wooden cross that extends in a direction orthogonal to the beam axis of the floor beam. The support material, floor sound insulation structure according to claim 2, characterized in Tei Rukoto arranged at intervals shorter than the interval of the pointing passed the floor joists to the floor beam. Floor sound insulation structure according to any one of claims 1 to 4, characterized in that sound-absorbing material below said planar damping material is arranged. The floor sound insulation structure according to any one of claims 1 to 5 , wherein the planar vibration damping material is a high specific gravity asphalt mat and has a thickness of 18 mm or more. Floor sound insulation structure according to claim 1, characterized in that the discontinuity between the side of the planar damping material to the side surface of the floor beam. The floor beams, floor sound insulation structure according to claim 1 or 7, characterized in that the floor beams of the building unit.