JP2007186850A - Sound-insulating floor structure of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively increase sound-insulating performance and enhance construction efficiency without increasing the height of a floor level in a floor structure using exposed beams. <P>SOLUTION: In this sound-insulating structure, a plurality of joists 4... are installed between the side surfaces 6... of the exposed beams 1... arranged generally parallel with each other and extended to a lower story space 30 so as to be fallen down. Floor bed material 3... are installed on the joists 4... Support members 10... supporting the ends of the joists 4... are installed on the side surfaces 6... of the exposed beams 1... Vibration damping materials 5... are interposed between the support members 10... and the ends of the joists 4. The joists 4... and the floor bed materials 3... are brought into non-contact with each other with spaces 20... for cutting out vibration formed between themselves and the exposed beams 1.... <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sound insulation floor structure in a building such as a detached house.

  Conventionally, in a detached house, the lower floor beam of the upper floor is exposed by projecting it into the lower floor space such as a living room, and a ceiling plate is directly attached to the floor beam of the upper floor to provide a ceiling surface of the lower floor space. A floor structure is known in which the lower floor space is expanded by raising the height and the interior of the lower floor space is enhanced.

  However, in such a floor structure, the upper floor beam, so-called beam, is exposed in the lower floor space, so that vibration with floor impact sound that occurs when a child jumps on the upper floor, for example, Propagation from the floor panel to the ceiling panel via the beam and not only the floor impact sound is radiated from the ceiling panel to the lower floor space, but also the floor impact sound is radiated directly from the beam to the lower floor space. .

  Therefore, the vibration propagation path between the floor board and the ceiling board is compared with the normal floor structure where the ceiling board is suspended and supported from the upper floor floor beam and the upper floor floor beam is not visible from the lower floor space. It is difficult to insulate, and it has been confirmed that the sound insulation performance is lowered.

  In general, in order to improve the sound insulation performance of the floor, measures such as increasing the weight of the floor board and the ceiling board are taken. However, when increasing the weight of floor boards and ceiling boards, it is necessary to change the design of the structure to support the floor boards and ceiling boards. Especially in wooden houses and lightweight steel houses, floor boards are required from the viewpoint of structural strength. And the weight of the ceiling panel cannot be increased unnecessarily.

  In addition, there is a method of improving the sound insulation performance by providing a double floor on the floor, but in this case, the floor level will rise and the indoor space will be narrowed, so it can be applied to general detached houses. Have difficulty.

  Therefore, for example, as disclosed in Patent Document 1, the floor panel is dropped between the side surfaces of the floor beams arranged substantially parallel to each other, and the floor panel is supported by the support member provided on the side surface of the beam. In addition, an anti-vibration rubber is interposed between the reinforcing frame of the floor panel and the support member, and between the floor base material of the floor panel and the floor beam so that the vibration of the floor panel is attenuated by the anti-vibration rubber. A proposed structure has been proposed.

JP 2000-45441 A

  However, in the structure disclosed in Patent Document 1, the floor base material of the floor panel is fixed to the floor beam by a stopper, and the floor panel and the floor beam are in an integrated state. Although rubber is interposed, vibration propagation from the floor panel to the floor beam has not been reduced sufficiently, and when applied to a floor structure using a beam with low sound insulation performance, it is still in the lower floor space. Floor impact noise can be a problem. If the floor panel and the floor beam are not integrated, the horizontal force is borne only by the floor beam, and the floor rigidity is lowered.

  In addition, there is a problem in that the construction work is poor since the floor panel is dropped between the floor beams and installed, and then the floor base material of the floor panel is fixed to the floor beam by a stopper.

  In order to eliminate the above problems, the present invention effectively enhances the sound insulation performance without causing an increase in floor level or a decrease in floor rigidity in a floor structure using a beam, and also improves workability. With the goal.

  In order to solve the above-described problem, the sound insulation floor structure of a building according to the present invention has a plurality of joists between side surfaces 6 of the plurality of beams 1 arranged in parallel with each other and projecting into the lower floor space 30. 4. In the floor structure in which the floor base material 3 is attached on the joists 4 and so on, the ends of the joists 4 and the ends of the joists 4 and the side surfaces 6 Is provided between the support member 10 and the end of the joist 4.. And the joist 4. The ground material 3 is made in a non-contact state by providing a vibration blocking gap 20 with respect to the display beam 1.

  Specifically, the support member 10 is placed on the receiving piece 11 on which the end portion of the joist 4 is placed, and rises from the receiving piece 11 to sandwich the end portion of the joist 4 from the left and right sides to restrain the movement in the horizontal direction. The vibration isolator 5 is interposed between the receiving piece 11 and the bottom surface of the end of the joist 4.

  Further, using the floor panel 2 in which the joists 4... And the floor base material 3 are integrated in advance, the joists 4 of the floor panel 2 are connected to the side surfaces 6 of the express beam 1. Hand over to drop into. Further, the vibration isolator 5 is integrally attached to the bottom surface of the end of the joists 4.

  Furthermore, a ceiling plate 24 is passed between the side surfaces 6 of the representative beam 1... Below the support member 10.

  In the sound insulating floor structure of the present invention, the joist and the floor base material are trimmed without being integrated with the beam, and the vibration propagates only through the vibration isolator between the end of the joist and the support member. Therefore, the propagation of vibration from the joist and floor base material side to the express beam side can be suppressed as much as possible, and the floor impact sound radiated to the lower floor space can be greatly reduced.

  In addition, since the joists are passed between the support members provided on the side surfaces of the plurality of beams, the floor level does not increase as in the case where a double floor is provided on the floor.

  In addition, since the end of the joist is constrained to move in the horizontal direction by a pair of restraining pieces in the support member, the joist and the floor base material are also cut off without integrating the joist and the floor base material. Regardless of this, the horizontal force applied to the beam can be borne by the joist or the floor base material via the restraining piece, and the proof stress can be maintained well.

  Furthermore, by using a floor panel in which the joist and the floor base material are integrated in advance, and the vibration isolator is also integrated, this floor panel is dropped between the sides of the beam, and the end of the joist is By simply supporting the floor panel with the support member, the floor panel can be easily attached without the need for fixing the floor panel with a conventional stopper, thereby improving the workability.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 4 show a sound insulation floor structure according to an embodiment of the present invention. In the figure, 1... Indicate the beams to be constructed on the upper floor in a wooden house, for example. These representation beams 1... Are made of, for example, wooden squares, have a width of about 120 mm, a height of about 330 mm, and are arranged substantially parallel to each other with an interval of about 500 mm.

  Reference numeral 2 denotes a floor panel installed on the express beam 1. As shown in FIG. 5, the floor panel 2 includes a floor base material 3, a joist 4... And a vibration isolating material 5... And these are integrated in advance in a factory or the like. The floor base material 3 is made of, for example, a substantially rectangular structural plywood. The joist 4 is made of, for example, a wooden square, and has a width of about 45 mm and a height of about 120 mm, and its length is slightly shorter than the arrangement interval of the beams 1. The anti-vibration material 5 is made of, for example, a plate-like anti-vibration rubber.

  Then, two rows of joists 4... Group are attached to the lower surface of the floor base material 3 with a gap slightly larger than the width of the beam 1. Each joist 4... Group is formed by arranging a plurality of joists 4 .. approximately parallel to each other with an interval of about 500 mm. The anti-vibration materials 5 are attached to the bottom surfaces of the both ends of the joists 4 attached to the lower surface of the floor base material 3 in this way.

  And on the upper part of both side surfaces 6 and 6 along the longitudinal direction of each beam 1, there is a support member 10... For supporting the end of the joist 4. It is attached at intervals. The support members 10 attached to the side surfaces 6 and 6 of the adjacent display beams 1 are opposed to each other.

  As shown in FIG. 6, the support member 10 is formed by bending a single metal plate, and includes a receiving piece 11 arranged in the horizontal direction and a pair of restraints rising from both ends of the receiving piece 11. The pieces 12 and 12 and a pair of fixed pieces 13 and 13 respectively extending in the direction orthogonal to the restraint pieces 12 and 12 from one end portion along the vertical direction of the restraint pieces 12 and 12 are provided. The support member 10 is attached to the side surface 6 of the display beam 1 by fixing the fixing pieces 13 and 13 to the side surface 6 of the display beam 1 with a fixing tool such as a screw.

  And installation of the floor panel 2 with respect to the beam 1 ... is performed as follows. That is, the joists 4... Of the floor panel 2 are dropped between the side surfaces 6 and 6 of the adjacent beam 1... And both ends of the joists 4. 12 and 12 are inserted from above into a U-shaped frame portion 15 that is open upward. Note that the upper end portions of the restraining pieces 12 and 12 are widened away from each other to facilitate insertion of the joists 4.

  At this time, as shown in FIG. 4, each end portion of the joists 4... Is placed on the receiving piece 11 of the support member 10 via the vibration isolator 5 and is further sandwiched by the restraining pieces 12 and 12 from both the left and right sides. . As a result, the ends of the joists 4 are supported by the support members 10 to prevent vibrations, and the joists 4 are restrained from moving in the horizontal direction, that is, along the longitudinal direction of the beam 1.

  In the installed state of the floor panel 2, the joists 4.. Are passed between the side surfaces 6 and 6 of the adjacent beam 1... So that the floor base material 3 covers the upper side of the beam 1. Is done. As shown in FIGS. 3 and 4, the joists 4 of the floor panel 2 and the floor base material 3 are placed in a non-contact state with a clearance 20.. It has become. That is, there is a vibration blocking gap between the end of the joist 4... And the side surface 6 of the representative beam 1... And between the lower surface of the floor base material 3 and the upper surface of the representative beam 1. 20.. Is formed, and the floor panel 2 is in a state of being edge-cut without being integrated with the beam 1.

  In addition, a plurality of floor panels 2 are sequentially installed on the beam 1 as shown above, and a flooring material 21 is laid on the floor base material 3 of the floor panels 2. Is done.

  Below the floor panel 2 installed in this way, a plurality of steel field edges 23 are provided between the side surfaces 6 and 6 of the adjacent display beams 1 and 1 via U-shaped holding frames 22 and 22. .. is passed, and a ceiling plate 24 made of gypsum board or the like is attached between the lower surfaces of the steel field edges 23. And between the floor panel 2 ... and the ceiling board 24 ..., the heat insulating material 25 is filled.

  Since each ceiling plate 24 is passed between the side surfaces 6 and 6 of the adjacent display beams 1 and 1, the lower portion of each display beam 1 protrudes downward from the ceiling plate 24 and enters the lower floor space 30. It is overhanging.

  In the above configuration, when an impact force such as when a child jumps on the floor panel 2... Is applied, the floor panel 2. At this time, the floor base material 3 and the joist 4 in the floor panel 2 are in a state of being edge-cut with respect to the beam 1 and the joist 4 is vibrated. Propagating to the beam 1 only through the anti-vibration material 5 between the support member 10.

  Therefore, the vibration of the floor panel 2... Propagates to the beam 1... While being effectively damped, and is radiated from the beam 1... And the ceiling plate 24 to the lower floor space 30. The floor impact sound can be greatly reduced.

  In addition, when the floor panel 2 is not cut and integrated with the beam 1 shown, the resistance to horizontal force is weakened, but the joists are restrained by the restraining pieces 12 and 12 of each support member 10. Since the horizontal movement of the joists 4 .. is constrained by sandwiching each end of 4..., The horizontal force applied to the beam 1. It is possible to bear the load, and the proof stress can be maintained well.

  The present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention. For example, in the above embodiment, the floor base material 3, the joists 4 .. and the vibration isolating material 5... Are integrated in advance to form the floor panel 2, but these are separately constructed on site. Also good. Further, the vibration isolating material 5... May be attached to the support member 10 in advance.

It is a disassembled perspective view of the sound insulation floor structure concerning one Embodiment of this invention. It is the longitudinal cross-sectional view similarly. FIG. 3 is a partially enlarged view of FIG. 2. It is a longitudinal cross-sectional view of a sound insulation floor structure. It is a disassembled perspective view of a floor panel. It is a perspective view of a supporting member.

Explanation of symbols

  1 .... Render beam 2 .... Floor panel 3 .... Floor base material 4 .... Jar joist 5 .... Anti-vibration material 6 .... Rider beam side 10 .... Support member 11, ... Receiving piece , 12..Restraining piece, 20..Gap for vibration isolation, 24..Ceiling board, 30..Lower space

Claims (6)

A plurality of joists (4) are placed between the side surfaces (6) of the plurality of beams (1), which are arranged substantially parallel to each other and project into the lower floor space (30). In the floor structure in which floor joists (3) are attached on the joists (4), the side joists (4), the side joists (4), A support member (10) for supporting the end portion is provided, and a vibration isolator (5) is interposed between the support member (10) and the end portion of the joist (4). In addition, the joists (4) and the floor base material (3) are made in a non-contact state with a clearance (20) for blocking vibration from the beam (1). Sound insulation floor structure of the building characterized by The building according to claim 1, wherein the support member (10) includes a pair of restraining pieces (12) (12) for restraining movement in a horizontal direction by sandwiching an end portion of the joist (4) from both left and right sides. Sound insulation floor structure. The support member (10) has a receiving piece (11) on which the end of the joist (4) is placed, and rises from the receiving piece (11), and the end of the joist (4) is sandwiched from both left and right sides to be horizontal. A pair of restraining pieces (12) and (12) for restraining movement in the direction, and a vibration isolating material (5) is interposed between the receiving piece (11) and the bottom surface of the end of the joist (4). The sound insulation floor structure of a building according to claim 1. Using the floor panel (2) obtained by previously integrating the joist (4)... And the floor base material (3), the joist (4) of the floor panel (2) is represented by the beam ( The sound insulation floor structure of a building according to any one of claims 1 to 3, wherein the sound insulation floor structure is passed between the side surfaces (6) of the 1). The sound-insulating floor structure of a building according to claim 4, wherein the vibration-proof material (5) is integrally attached to a lower surface of an end of the joist (4) in the floor panel (2). The building according to any one of claims 1 to 5, wherein a ceiling board (24) is passed between the side faces (6) of the representative beam (1), and below the support member (10). Sound insulation floor structure.