JP2520973B2 - Floor structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floor structure having good floor impact sound insulation performance.

[Prior Art] Conventionally, as a floor structure constituting a wooden building unit or the like, one described in JP-A-62-55358 has been used.

This floor structure forms an outer frame with a plurality of floor girders, fixes each of a plurality of floor girders arranged in parallel to each other of the floor girders facing each other, and further on the upper part of each floor girder. It is constructed by fixing the floor board.

[Problems to be Solved by the Invention] However, in a building constructed by using the floor structure as described above, floor impact noise (heavy floor impact noise or lightweight floor impact noise) generated in the upper floor room May be transmitted to the lower floors and impair comfortability.

An object of the present invention is to improve the floor impact sound insulation performance of a floor structure.

[Means for Solving the Problems] In the present invention, an outer frame is formed by a plurality of floor girders, and a plurality of floor girders arranged in parallel with each other is fixed to each of the floor girders facing each other. In a floor structure constructed by fixing a floor plate to the upper part of each floor beam, a connecting material that connects the floor beams to each other is attached to the side surfaces of the adjacent floor beams that face each other at approximately the center in the longitudinal direction. Wearing and arranging two ceiling hangers parallel to the floor beams in the connecting material arrangement area between adjacent floor stiles, each ceiling hanger is set to be longer than half of the total length of the floor beams. Ceiling hangers are fixed to one of the opposing floor girders and the connecting material, and the other ceiling hangers are fixed to the other of the opposite floor girders and the connecting material, and the ceiling boards of the lower floor are hung on these ceiling hangers. It is designed to be lowered and supported.

[Operation] According to the present invention, there are the following operations (1) to (4).

(1) As a result of analysis by the present inventor of the vibration pattern of the low-pitched portion (63 Hz band) of the heavy floor impact sound generated in the conventional floor structure, FIG. 6 was obtained. In FIG. 6, a, b, c, d
Is a vibration pattern of each floor beam (displacement in the up-down direction orthogonal to the floor surface of the floor beam). According to FIG. 6, it is recognized that, in the vibration patterns of the adjacent floor beams, the group of a and d and the group of b and c have completely opposite phases.
Therefore, in the present invention, based on the analysis of this vibration pattern, adjacent floor girders are connected to each other using a connecting member, and a and b, b and c, c and d in the above vibration pattern are connected. It has been found that a good damping effect can be secured by suppressing each relative displacement.

However, in the conventional floor structure, when a child jumps or runs around on the floor of the building, the entire floor vibrates mainly due to the excitation of the beam, and the vibration of the entire floor causes the low-pitched portion of the heavy floor impact sound. Cause. At this time, in the floor structure of the present invention, as described above, since the vibration of the floor beam is effectively damped, as a result, the vibration of the entire floor is damped,
The low-pitched, heavy floor impact sound can be reduced, and habitability can be improved.

(2) Among floor impact sounds, in order to block light floor impact sounds (medium and high frequencies of 500 Hz or more) such as footsteps with low impact force generated on the upper floors, conventionally, ceiling ceiling boards have been used with short ceiling hanging trees. It has a suspended ceiling structure that is directly fixed to the floor beam at multiple points. Therefore, in the present invention, since a suspended ceiling structure in which a long ceiling hanging tree is further supported by a floor beam through a connecting member is adopted, a lightweight floor impact sound is emitted from the floor beam through a connecting member. Since it is transmitted to the ceiling suspension tree, the solid propagation path is longer than the conventional suspended ceiling structure, and the contact points that are transmitted are reduced by the connecting material, solid propagation sound is reduced, and the general effect of the suspended ceiling structure is light weight. The floor impact sound insulation performance can be further improved.

(3) When forming a suspended ceiling structure over the entire floor structure,
Two ceiling hangers are provided between adjacent floor beams, one ceiling hanger is fixed to one of the opposing floor girders and a connecting material, and the other ceiling hanger is connected to the other of the opposing floor girders. It shall be fixed to the timber, and each ceiling hanging tree does not affect the entire length of the floor structure. Therefore, the vibration of the ceiling hanging tree does not reach the entire length of the lower floor ceiling plate, and the heavy floor impact sound insulation performance can be improved.

(4) In (3) above, each ceiling hanging tree is longer than half the total length of the floor beam. Therefore, even if the connecting member is not arranged at the complete center in the longitudinal direction of the floor beam due to the circumstances such as wiring of the wiring behind the ceiling, the ceiling hanging tree can be fixed to the connecting member without fail. With such a suspended ceiling structure, it is possible to improve productivity while ensuring light-weight floor impact sound insulation performance.

[Embodiment] FIG. 1 is a sectional view showing a floor structure according to an embodiment of the present invention, FIG. 2 is a plan view schematically showing the floor structure, and FIG. 3 is a perspective view of an essential part of FIG. FIG. 4 is a schematic diagram showing a wall-type building unit, FIG. 5 is a schematic diagram showing a unit building, and FIG. 6 is a schematic diagram showing a vibration pattern of a conventional floor structure.

In the unit building 10 shown in FIG. 5, a plurality of lower floor building units 12 are arranged adjacent to each other on an upper part of the foundation 11, a plurality of upper floor building units 13 are arranged adjacent to each other on the upper part of the lower floor building unit 12, and further A plurality of roof units 14 are mounted on top of the upper-floor building unit 13.

Here, the building units 12 and 13 are, as shown in FIG.
It is a wall type and has a floor structure (floor panel) 21 and a floor structure 21.
And a wall panel 22 provided upright on the side edge portion of the.

The floor structure 21 forms an outer frame by nailing four wooden floor girders 23 (side joists and end joists) to each other as shown in FIGS. Each of the wooden floor beams 24 (joists) to be placed is bridged between the opposing floor girders 23, 23, and both ends of each floor girder 24 are nailed to each of the opposing floor girders 23. Fixed. Furthermore, the floor structure 21 is directly attached to the floor board 25 on the upper part of each floor beam 24.
Are fixed with adhesive or nailing.

In addition, the floor structure 21 is a vertical direction orthogonal to the floor surface of the floor beams 24, which are connected to the side surfaces of the adjacent floor beams 24 that face each other substantially at the center in the longitudinal direction. The connecting member 31 that suppresses relative displacement is fixed by an adhesive or nailing.

Further, in the floor structure 21, two ceiling hanging trees 32 and 33 are provided in the area where the connecting member 31 between the adjacent floor beams 24 is provided.
The ceiling hangers 32 and 33 are arranged parallel to 24, and are set to be longer than half the total length of the floor beam 24. At this time, one ceiling hanging tree
32 is fixed to one of the facing floor girders 23 and the connecting member 31 by an adhesive or nailing, and the other ceiling hanging tree 33 is adhesive or nailing to the other of the facing floor girders 23 and the connecting member 31. It is fixed in. Then, on the lower surface of the ceiling hanging trees 32, 33, a field edge 41 provided orthogonally to the hanging trees 32, 33 is fixed by an adhesive or nailing, and a plaster is formed on the lower surface of each field edge 41. The lower ceiling plate 42 such as a board is fixed by an adhesive or nailing.

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

(1) By connecting the adjacent floor girders 24 to each other using the connecting member 31, and suppressing the relative displacement of the floor girders 24,
A good vibration damping effect can be secured for the floor structure 21.

However, in the conventional floor structure, when, for example, a child jumps or runs around on the floor of the building 10, the entire floor vibrates mainly due to the excitation of the floor beam 24, and the vibration of the entire floor causes a heavy impact sound to be generated. It causes the bass. At this time, in the floor structure 21, as described above, since the vibration of the floor beam 24 is effectively damped, as a result, the vibration of the entire floor is damped, and a low-weight heavy floor impact sound is generated. It can be reduced and the habitability can be improved.

(2) Compared to the conventional suspended ceiling structure in which a short ceiling sling is used to directly fix the ceiling plate to the floor beam directly at a plurality of locations, a long ceiling sling 32 is attached to the floor via a connecting member 31. Since the suspended ceiling structure supported by the cross beam 24 is adopted, the lightweight floor impact sound is transmitted from the floor cross beam to the long ceiling hanging tree through the connecting material, so the solid propagation path is better than the conventional suspended ceiling structure. Is long and the number of contact points transmitted is small only between the connecting members, so that solid-borne sound is reduced, and the light-weight floor impact sound insulation performance, which is a general effect of the suspended ceiling structure, can be further improved.

(3) When forming a suspended ceiling structure over the entire floor structure 21, two ceiling hangings 32, 33 are provided between adjacent floor beams 24, and one ceiling hanging 32 is a floor facing each other. Fixed to one of the girders 23 and the connecting member 31, the other ceiling hangings 33 are floor girders facing each other.
It shall be fixed to the other side of 23 and the connecting member 31, and each ceiling hanging tree
32 and 33 do not affect the total length of the floor structure 21. Therefore, the vibration of the ceiling hanging trees 32, 33 does not reach the entire length of the lower floor ceiling plate 42, and the heavy floor impact sound insulation performance can be improved.

(4) In (3) above, each ceiling hanging tree 32, 33 is a floor beam.
It should be longer than half of the total length of 24. Therefore, even if the connecting member 31 is not arranged at the complete center in the longitudinal direction of the floor beam 24 due to the circumstances such as wiring under the ceiling, the ceiling hanging trees 32, 33 must be fixed to the connecting member 31. Therefore, it is possible to improve productivity while ensuring the lightweight floor impact sound insulation performance by the suspended ceiling structure as described in (2) above.

Since the floor structure of the present invention contains the above-mentioned connecting material within the range of the normal floor thickness, in reducing the floor impact noise, there is a disadvantage such as increasing the floor thickness and lowering the ceiling height. Not accompanied.

[Effects of the Invention] As described above, according to the present invention, the floor impact sound insulation performance of the floor structure can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a floor structure according to an embodiment of the present invention, FIG. 2 is a plan view schematically showing the floor structure, and FIG. 3 is a perspective view of an essential part of FIG. FIG. 5 is a schematic diagram showing a wall type building unit, FIG. 5 is a schematic diagram showing a unit building, and FIG. 6 is a schematic diagram showing a vibration pattern of a conventional floor structure. 21 …… floor structure, 23 …… floor girder, 24 …… floor beam, 25 …… floor board, 31 …… connecting material, 32,33 …… ceiling hanging tree, 42 …… lower floor ceiling board.

Claims (1)

(57) [Claims] 1. An outer frame is formed by a plurality of floor girders, each of a plurality of floor girders arranged in parallel with each other is fixed to each of the floor girders facing each other, and a floor board is further provided above each floor girder. In a floor structure constructed by fixing the above-mentioned floor girders, connecting members for connecting the floor girders to each other are attached to the opposite side faces at the substantially central portion in the longitudinal direction of the adjacent floor girders. Two ceiling hangers are arranged parallel to the floor beams in the connecting material installation area between the beams, each ceiling hang is set to be longer than half of the total length of the floor beams, and one ceiling hang is on the opposite floor. One of the girders is fixed to the connecting member, and the other ceiling hanging tree is fixed to the other of the floor girders and the connecting member facing each other, and the lower floor ceiling plate is hung and supported by the ceiling hanging tree. Floor structure.