JP2019094679A - Floor structure - Google Patents

Abstract

To provide a floor structure that can restrict warp and oscillation of a CLT floor, improve a sound insulation performance against a heavy floor impact noise, and reduce weight.SOLUTION: A floor structure 1 according to this invention comprises: a CLT floor 2 formed of CLT; multiple supporting legs 3, 3... disposed at predetermined intervals on the CLT floor 2; and a floor panel constitution part 4 that is formed on the multiple supporting legs 3, 3... The floor panel constitution part 4 has a base material layer 5, which is disposed on the supporting legs 3, 3... and fixed on the supporting legs 3, 3..., and a rigid density reinforcement layer 6, which is disposed on the base material layer 5 and fixed on the base material layer 5. The rigid density reinforcement layer 6 has a high density layer 8 and a sandwiching layer 9 that vertically sandwiches the high density layer 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a floor structure comprising a floor formed by CLT (Cross Laminated Timber).

A floor structure configured using a floor material formed by CLT is known (see Patent Document 1).
In a large medium-sized wooden building, as shown in FIG. 2, a CLT floor 2 formed by CLT and a plurality of supports with anti-vibration rubber disposed at predetermined intervals on the CLT floor 2 There is known a floor structure having a configuration including legs 3, 3 ... and floor board components 40 formed on a plurality of support legs 3, 3 ... (see Non-Patent Document 1).
Large and medium-sized wooden buildings are relatively large wooden buildings such as schools, hotels, apartments, nursing homes, and public offices constructed with a frame structure or a wall structure.
The floor board construction portion 40 having the above-described floor structure includes the base material layer 5 configured by arranging a plurality of particle boards or a plurality of plywoods or the like on the support legs 3. It is the structure provided with the floor finishing layers 7 such as the flooring provided on the two-layer asphalt sheet layers 8 and 8 provided on two layers and the two-layer asphalt sheet layers 8 and 8.
According to the floor structure, the density (weight) of the floor plate component 40 can be increased by the two asphalt sheet layers 8 and 8, and weight floor impact noise can be reduced.

JP, 2017-25524, A

Japan CLT Association Technical Report 2017 The Japan CLT Association, May 30, 2017, page 43.

However, in the above-described floor structure, the rigidity of the floor plate component is small. That is, since the floor plate component is easily bent, the weight floor impact noise reducing effect is small.
The present invention provides a floor structure capable of further improving the sound insulation performance against heavy floor impact noise.

The floor structure according to the present invention comprises a CLT floor formed by CLT, a plurality of support legs disposed at a predetermined distance above the CLT floor, and a floor board configuration formed on the plurality of support legs. And a floor plate component comprising: a base material layer provided on the support leg and fixed to the support leg; and a rigidity density reinforcing layer provided on the base material layer and fixed to the base material layer Since the rigid density reinforcing layer includes the high density layer and the sandwiching layer sandwiching the high density layer from above and below, the floor structure can further improve the sound insulation performance against heavy floor impact noise.
In addition, the rigidity density reinforcing layer is configured such that a plurality of asphalt sheets are arranged on the lower layer, and the lower layer of the sandwiching layer configured by arranging a plurality of plywoods on the base material layer. Since it is composed of one or more high-density layers installed and configured, and the upper layer of the sandwiching layer configured so that a plurality of plywoods are arranged on the high-density layer, weight floor impact It becomes a floor structure which can further improve the sound insulation performance to a sound.
In addition, the lower layer is formed such that the long side of the plate surface of the asphalt sheet forming the lower layer and the long side of the plate surface of the asphalt sheet forming the upper layer are orthogonal to each other. Since the asphalt sheet that forms the upper layer and the asphalt sheet that forms the upper layer are installed, the mutual binding force between the asphalt sheet that forms the lower layer of the high density layer and the asphalt sheet that forms the upper layer is increased. Improves the integration of the floor structure, resulting in a floor structure with excellent sound insulation performance against heavy floor impact noise.
In addition, the lower layer of the sandwiching layer is formed so that the long side of the plate surface of the plywood forming the lower layer of the sandwiching layer and the long side of the plate surface of the plywood forming the upper layer of the sandwiching layer are orthogonal to each other Since the plywood to be used and the plywood forming the upper layer of the sandwiching layer are installed, the restraining force to sandwich the high density layer between the lower layer of the sandwiching layer and the upper layer of the sandwiching layer is increased. Integration is improved, and the floor structure is excellent in sound insulation performance against heavy floor impact noise.
In addition, fixing means for fixing the rigid density reinforcing layer to the base material layer penetrates the upper layer of the sandwiching layer, the high density layer, and the lower layer of the sandwiching layer from the upper surface of the plywood forming the upper layer of the sandwiching layer. And the mounting pitch of the fixing means is less than or equal to 455 mm, so that the high density layer is sandwiched between the sandwiching layers. A screw or the like penetrates the upper layer, the high density layer, or the lower layer and is fastened to the base material layer, and the screw or the like is screwed to the upper layer, lower layer, or base material layer having a large binding force to the screw or the like. As a result, the binding force to the high density layer is increased, and the integration of the rigidity density reinforcing layer is improved, so that the floor structure is excellent in the sound insulation performance against heavy floor impact noise.

Sectional drawing which shows an example of the floor structure of embodiment. Sectional drawing which shows an example of the conventional floor structure.

  As shown in FIG. 1, the floor structure 1 according to the embodiment is disposed at a predetermined distance above the CLT floor 2 formed by CLT (Cross Laminated Timber (crossed laminated board)) and the CLT floor 2. The plurality of support legs 3, 3,... And the floor board component 4 formed on the plurality of support legs 3, 3.

The CLT floor 2 is a floor configured using CLT as a material of a floor of a wooden building formed by a frame construction method or a wall method.
The CLT floor 2 is, for example, a rigid frame structure composed of an unshown column formed of laminated wood and an unillustrated pillar formed of laminated wood, and the end is placed on the beam to provide an inter-beam connection. Or a wall-type structure composed of a wall outside the figure formed by CLT, the end of which is a floor mounted on the wall and installed between the walls.
The height dimension H of the CLT floor 2 is, for example, 150 m to 360 mm (corresponding to the thickness dimension of 5 layers of lamina to 12 layers of lamina).

In addition, as defined in Ministry of Agriculture, Forestry and Fisheries Notification No. 3079, “CLT” refers to “punch board or small angle lumber (these are prepared by bonding and bonding them in the longitudinal direction with their fiber directions almost parallel to each other). A general material in which the fiber directions are almost parallel to each other and aligned or bonded in the width direction, and the fiber directions are mainly orthogonal to each other and laminated and bonded to have a structure of three or more layers. .
That is, CLT is a wood constructed by laminating a plurality of boards so that the fiber directions of the boards to be laminated are orthogonal to each other, and it is called a cross laminated board.
Further, the above-described laminated wood is a wood constructed by laminating a plurality of boards so that the fiber direction of the boards to be laminated is parallel.

The support leg 3 includes a vibration-proof rubber 31 as a vibration-proof material installed on the CLT floor 2, a support 32 whose lower part is attached to the vibration-proof rubber 31 and supported by the vibration-proof rubber 31, and the upper end of the support 32 And a pedestal 33 provided on the part.
The outer peripheral surface of the upper part of the support | pillar 32 is formed in the external thread part outside a figure.
The pedestal 33 is formed of, for example, particle board or plywood for structure.
The pedestal 33 is provided with a through hole (not shown) penetrating to the upper and lower surfaces of the pedestal 33, and a cylindrical body (not shown) penetrating vertically through the through hole is fixed in the through hole. Is formed on an unshown internal thread.
That is, in the support leg 3, the pedestal 33 is attached to the support 32 by screw fitting between the external thread of the external thread formed on the outer peripheral surface of the upper portion of the support 32 and the internal thread of the internal thread formed on the inner peripheral surface of the cylinder. On the other hand, it is configured to be movable up and down, and the level (height) of the floor board construction part 4 can be adjusted by adjusting the level (height) of the pedestal 33.

  The floor board constitution portion 4 is provided on the plurality of support legs 3, 3... And fixed on the support legs 3, 3. And a floor finishing layer 7 provided on the rigid density reinforcing layer 6.

The base material layer 5 is configured to be installed such that the plate surfaces of a plurality of plate members having a rectangular plate surface such as a plurality of particle boards or a plurality of plywood are arranged on a plurality of support legs 3. .
For example, the plate surfaces of a plurality of particle boards or a plurality of plate materials such as a plurality of plywood constituting the base material layer 5 are mounted on pedestals 33, 33 of a plurality of support legs 3, 3 ... to form a horizontal surface And fixed to the pedestals 33, 33... By fixing means such as screws.
Although the short side dimension, long side dimension and plate thickness dimension of the particle board and the plywood forming the base material layer 5 are not particularly limited, for example, the base layer 5 has a short side dimension 600 mm and a long side dimension 1820 mm It is comprised by the particle board layer of 1 layer using the particle board of 25 mm of plate | board thickness dimensions with a rectangular board surface.

  The rigid density reinforcing layer 6 includes a high density layer 8 and a sandwiching layer 9 sandwiching the high density layer 8 from above and below.

  The lower layer 9A of the sandwiching layer 9 is configured such that the rigid density reinforcing layer 6 is installed such that the plate surfaces of a plurality of plywoods having rectangular plate surfaces are arranged on the base material layer 5; One or more high-density layers 8 installed so that the plate surfaces of a plurality of asphalt sheets having rectangular plate surfaces are arranged side by side on the layer 9A, and a rectangular plate on the high-density layers 8 It is comprised by the upper layer 9B of the clamping layer 9 installed and comprised so that the board surface of the several plywood which had a surface might be located in a line.

The high density layer 8 is constituted of a plurality of asphalt sheet layers stacked in the vertical direction, for example, two asphalt sheet layers as shown in FIG. 1 or one asphalt sheet layer.
Although the short side dimension, long side dimension, plate thickness dimension and specific gravity of the asphalt sheet forming the high density layer 8 are not particularly limited, for example, it has a rectangular plate surface having a short side dimension of 455 mm and a long side dimension 910 mm. An asphalt sheet having a thickness of 10 mm or 8 mm and a specific gravity of 2.3 or more is used.

  The short side dimension, the long side dimension, and the plate thickness dimension of the plywood forming the sandwiching layer 9 are not particularly limited, but the lower layer 9A and the upper layer 9B have, for example, a short side dimension 910 mm and a long side dimension 1820 mm It is composed of a single-ply plywood layer using plywood such as a structural plywood having a thickness of 12.5 mm or 9.5 mm or 5.5 mm having a rectangular plate surface, a common plywood, a plywood for a concrete mold and the like.

  The base material layer 5 is fixed to the pedestals 33 of the plurality of support legs by fixing means such as screws, and the rigid density reinforcing layer 6 is fixed to the base layer by fixing means such as screws. The screw or the like is, for example, a screw screw (screw), a tacker needle, a screw nail, a nail or the like.

When the high density layer 8 is constituted by a plurality of asphalt sheet layers, the long side of the plate surface of the asphalt sheet forming the lower layer and the long side of the plate surface of the asphalt sheet forming the upper layer are orthogonal to each other Thus, an asphalt sheet forming the lower layer and an asphalt sheet forming the upper layer are provided.
Furthermore, the long side of the plate surface of the plywood forming the lower layer 9A of the holding layer 9 and the long side of the plate surface of the plywood forming the upper layer 9B of the holding layer 9 are orthogonal to each other. Plywood forming the lower layer 9A and plywood forming the upper layer 9B of the sandwiching layer 9 are provided.
And as shown in FIG. 1, the fixing means 10 which fixes the rigid density reinforcement layer 6 to the base material layer 5 is the upper layer 9B of the clamping layer 9 from the upper surface of the plywood which forms the upper layer 9B of the clamping layer 9, A screw or the like which penetrates the lower layer 9A of the high density layer 8 and the sandwiching layer 9 and reaches a position lower than the intermediate position in the layer thickness direction of the base material layer 5 is used. The mounting pitch of the screw or the like is 455 mm or less, preferably 303 mm or less.
The installation mode of the plywood forming the sandwiching layer 9 as described above, the installation mode of asphalt sheets forming the plurality of asphalt sheet layers of the high density layer 8, the length of screws, etc., and the mounting pitch of screws etc. As a result, the integration of the rigidity density reinforcing layer 6 is improved, so that the rigidity density reinforcing layer 6 having high rigidity and density (weight) can be constructed, and against the weight floor impact sound in the double floor structure for the CLT floor 2 Sound insulation effect is improved.
That is, the asphalt sheet forming the lower layer of the high density layer 8 and the asphalt sheet forming the upper layer are disposed orthogonally, and the plywood forming the lower layer 9A of the sandwiching layer 9 and the upper layer 9B of the sandwiching layer 9 By mutually arranging the plywood to be formed, the mutual binding force by the asphalt sheet forming the lower layer of the high density layer 8 and the asphalt sheet forming the upper layer is also increased, and the lower layer 9A of the sandwiching layer 9 Since the restraining force for sandwiching the high density layer 8 with the upper layer 9B of the sandwiching layer 9 is increased, the integration of the rigidity density reinforcing layer 6 is improved.
Further, screws and the like pass through the upper layer 9B, the high density layer 8 and the lower layer 9A in a state in which the high density layer 8 is sandwiched by the holding layers 9, and are fastened to the base layer 5, and the screws and the like are screwed By being screwed to the upper layer 9 B, the lower layer 9 A, and the base material layer 5 having a large binding force with respect to the above, the binding force to the high density layer 8 is increased, and the integration of the rigid density reinforcing layer 6 is improved.
The plywood has, for example, a short side dimension of 910 mm and a long side dimension of 1820 mm. Therefore, the plywood of the lower layer 9A and the plywood of the upper layer 9B are arranged orthogonally, and the screws etc. Fixing to the base material layer 5 by penetrating the asphalt sheet of the above and the plywood of the upper layer 9B becomes a rigid high-rigid floorboard construction part 4 integrated in the whole of this part. This is because the weight floor impact noise generated on the floor spreads in the horizontal direction instantaneously in the floor plate component 4 with high rigidity, so the weight floor impact noise supports the plurality of support legs 3, 3 ... The vibration isolation rubbers 31, 31... Absorb the sound insulation effect.
In addition, by configuring the high density layer 8 with asphalt sheets, it is possible to enhance the effect of measures against heavy floor impact noise with respect to the CLT floor 2 whose sound insulation performance against heavy floor impact noise is lower than that of a reinforced concrete floor.

  The floor finish 7 is configured by providing a floor finish such as a flooring, a carpet, a tile, a carpet, a stone board, a tatami mat, and the like on the upper layer 9B of the sandwiching layer 9.

According to the floor structure 1 of the wooden building according to the embodiment, the CLT floor 2 formed by the CLT, and the plurality of supporting legs 3, 3 ... disposed at predetermined intervals on the CLT floor 2 , In a double floor structure comprising a floor board component 4 formed on a plurality of support legs 3, 3, ..., the floor board component 4 is provided on the support legs 3, 3. , 3 ..., and a rigid density reinforcing layer 6 provided on the base material layer 5 and fixed to the base material layer 5, the rigid density reinforcing layer 6 being a high density layer 8 and the sandwiching layer 9 (the lower layer 9A and the upper layer 9B) sandwiching the high density layer 8 from above and below, it is possible to construct the rigidity density reinforcing layer 6 having a large rigidity and density (weight) It has become possible to provide a double floor structure targeting CLT floor 2 that has a high sound insulation effect against impact noise.
In addition, in the double floor structure for the floor slabs of reinforced concrete buildings, when the rigidity density reinforcing layer 6 as in this embodiment is provided, it becomes an overspecification, but it shakes like a CLT floor of a wooden building In the case of a double floor structure intended for a lightweight and light wooden floor, the sound insulation effect against heavy floor impact noise can be improved by providing a rigid density reinforcing layer 6 having high rigidity and density as in the embodiment.

In addition, you may comprise the high density layer 8 using the board | plate material of materials other than an asphalt sheet | seat. For example, a plate material of a material having a density (weight) equal to that of the asphalt sheet may be used.
Moreover, you may comprise the clamping layer 9 using the board | plate material of materials other than a plywood. For example, as in the case of plywood, it is possible to use a plate material having a large rigidity and a large constraining force on a screw or the like.

1 floor structure, 2 CLT floor, 3 support legs, 4 floor board components, 5 base layer,
6 rigidity density reinforcing layer, 8 high density layer, 9 sandwiching layer, 9A sandwiching layer lower layer,
9B Upper layer of sandwiching layer.

Claims (5)

A CLT floor formed by CLT, a plurality of support legs disposed at a predetermined distance above the CLT floor, and a floorboard component formed on the plurality of support legs,
The floor board component comprises a base material layer provided on the support leg and fixed to the support leg, and a stiffness density reinforcing layer provided on the base material layer and fixed to the base material layer,
A floor structure characterized in that the rigid density reinforcing layer comprises a high density layer and a sandwiching layer sandwiching the high density layer from above and below.   The rigid density reinforcing layer is disposed such that a plurality of asphalt sheets are disposed on the lower layer of the sandwiching layer configured by a plurality of plywoods disposed on the base layer and disposed on the lower layer. A high-density layer composed of one or more layers, and an upper layer of a sandwiching layer formed by arranging a plurality of plywood on the high-density layer. The floor structure described in 1.   The high density layer is formed of a plurality of asphalt sheet layers, and the lower layer is formed such that the long side of the plate surface of the asphalt sheet forming the lower layer and the long side of the plate surface of the asphalt sheet forming the upper layer are orthogonal to each other The floor structure according to claim 2, wherein the asphalt sheet to be formed and the asphalt sheet forming the upper layer are installed.   Plywood forming the lower layer of the sandwiching layer so that the long side of the plate surface of the plywood forming the lower layer of the sandwiching layer and the long side of the plate surface of the plywood forming the upper layer of the sandwiching layer are orthogonal to each other The floor structure according to claim 2 or 3, wherein and the plywood forming the upper layer of the sandwiching layer are installed.   The fixing means for fixing the rigidity density reinforcing layer to the base material layer penetrates the upper layer of the sandwiching layer, the high density layer, and the lower layer of the sandwiching layer from the upper surface of the plywood forming the upper layer of the sandwiching layer. It is attached so as to reach a position below the middle position in the layer thickness direction of the material layer, and the mounting pitch of the fixing means is 455 mm or less. Floor structure described in Section.

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