JP6677986B2 - Floor structure - Google Patents

Description

  The present invention relates to a floor structure and the like capable of reducing a floor impact sound.

  Conventionally, a floor structure is configured in which rubber is partially disposed under a floor panel such as particle board or plywood, and a sound absorbing material such as glass wool or rock wool is disposed in an air layer where rubber is not disposed. It is known (see, for example, Patent Document 1).

JP-A-7-34642

  However, in the above-mentioned conventional floor structure, although the floor impact sound can be reduced, the floor rigidity is low, so that when a large load is repeatedly applied to the floor, there is a problem that the sink of the floor becomes large. .

  The present invention has been made in view of the conventional problems, and an object of the present invention is to provide a floor structure capable of suppressing a sinking of a floor while ensuring sufficient floor impact noise reduction performance.

The present invention relates to a floor structure comprising a floor slab, a sound absorbing layer provided on a slab surface of the floor slab, a base layer provided on the sound absorbing layer, and a finishing layer provided on the base layer. Wherein the underlayer comprises a vibration-damping underlayer provided on the sound-absorbing layer side, and a sound-insulating underlayer provided on the finishing layer side, wherein the vibration-damping underlayer and the sound-insulating underlayer are provided. And the finishing layer are stacked on the sound absorbing layer, the sound insulating base layer and the vibration damping base layer each include a plurality of plate members, and the plate members constituting the vibration damping base layer are When the joints and the side joints are arranged in a straight potato joint, and the extension direction of one side of the plate member constituting the sound insulation base layer is the width direction, and the extension direction of the other side is the length direction. the plate members constituting the sound insulation underlayer, horses are stepping joint tension in the width direction, the vibration-suppression underlayer Constituting the plate member is in said width direction on both sides of the corner portions of the plate members constituting the vibration damping underlayer is fixed to the plate member constituting the sound insulating underlayer, the damping underlayer When the portion of the plate member that is fixed to the plate member that forms the sound insulation base layer is a fixed portion, the sound absorbing layer located below the fixed portion is placed on the slab surface. A fiber sound-absorbing layer comprising a rubber block body and a plate portion provided on the rubber block body, wherein a sound-absorbing layer located at a portion other than a lower portion of the fixed portion is formed of inorganic fibers. and wherein the der Rukoto.
As described above, if the plate member forming the damping base layer and the plate member forming the sound insulation base layer are integrated, the floor rigidity can be increased without increasing the thickness of the damping base layer. Therefore, it is possible to suppress sinking of the floor while securing sufficient floor impact noise reduction performance.
In addition, the plate members forming the sound insulation base layer are arranged on the footsteps in the width direction, and the plate member forming the vibration suppression base layer and the plate member forming the sound insulation base layer are controlled. by fixing at widthwise both sides of the corner portions of the plate members constituting the cotton rose underlayer, the plate member of the damping underlayer three columns adjacent to each other in the width direction, constitutes the shielding sound insulating underlayer Since the connection is made via the plate member, the floor rigidity can be increased, and the sinking of the floor can be effectively suppressed.
Further, a rubber block body placed on a slab surface is provided with a sound absorbing layer positioned below a fixed portion between a plate member forming a vibration damping base layer and a plate member forming a sound insulating base layer, A rubber sound absorbing layer having a plate portion provided on the block body and a sound absorbing layer located at a portion other than the lower portion of the fixed portion is a fiber sound absorbing layer formed of inorganic fibers, so that the cushioning property is reduced. Without sinking, floor subsidence can be suppressed.

Further, the plate member constituting the front Symbol damping underlayer, the so sound insulation and the plate member constituting the base layer was fixed to a plate portion of the rubber backing layer, it can be further improved floor rigidity, The effect of suppressing the sinking of the floor can be further enhanced.
Further, since the rubber block body of the rubber sound absorbing layer is bonded and fixed to the slab surface and integrated with the slab, floor rigidity can be further improved.

FIG. 2 is a diagram showing a floor structure according to the first embodiment of the present invention. It is a figure which shows the floor structure which concerns on Embodiment 2 of this invention. It is a figure which shows the attachment method of a rubber sound-absorbing layer. It is a figure showing other examples of a floor structure by the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 (a) and 1 (b) show a floor structure 1 according to the first embodiment, in which 2 is a floor slab and 3 is a sound absorbing layer provided on a slab surface 2S of the floor slab 2. Reference numeral 4 denotes a damping base layer provided on the sound absorbing layer 3, 5 denotes a sound insulating base layer provided on the damping base layer 4, 6 denotes a floor finishing layer provided on the sound insulating base layer 5 It is.
The sound absorbing layer 3 is formed of a plurality of inorganic fiber plates 3P in which inorganic fibers such as glass wool or rock wool are formed into a plate shape, and absorbs vibrations transmitted from the floor finishing layer 6 and has a slab surface. Absorbs 2S irregularities.
The damping base layer 4 is made of, for example, a wood base plate such as a particle board, and is formed of a base plywood 4P having a square shape in a plan view, and a damping base such as an asphalt mat adhered to the sound insulation base layer 5 side of the base plywood 4P. And a seat 4Q.
In this example, as shown by the broken lines in FIG. 1A, the base plywood 4P is disposed at a continuous joint (pot joint) in which the vertical joint and the horizontal joint are linear.

In this example, the damping sheet 4Q is a square mat having the same size as the base plywood 4P, and the damping sheet 4Q and the base plywood 4P constituting the damping base layer 4 and the sound absorbing layer 3P. The sound-absorbing layer 3 is integrated with the inorganic fiber board 3P, and a plurality of the sound-absorbing layers 7P are arranged on the floor slab 2 so that the sound-absorbing layer 3 and the vibration-damping underlayer 4 are combined. Configured.
In addition, as the damping sheet 4Q, a mat having a size that covers the plurality of base plywoods 4P may be used.
The sound insulation base layer 5 is composed of a plurality of gypsum plates 5P containing a glass fiber nonwoven fabric disposed on the sound absorbing laminate 7P. The gypsum board 5P containing the glass fiber nonwoven fabric is inexpensive and has the same level of floor impact noise reduction performance and load-bearing performance as wooden plywood such as softwood plywood. Therefore, it is suitably used as a plate having sound insulation performance.
The floor finishing layer 6 is configured by, for example, arranging a floor finishing plate 6P made of a floor finishing material such as a flooring on a gypsum board 5P containing a glass fiber nonwoven fabric.

The total thickness of the laminated body in which the sound absorbing layer 3, the damping base layer 4, the sound insulation base layer 5, and the floor finishing layer 6 are stacked is, for example, about 50 mm to 100 mm, preferably about 60 mm or less. Is preferred.
Specifically, the thickness of the inorganic fiber board 3P is about 25 mm, the thickness of the base plywood 4P is about 9.0 mm, the thickness of the damping sheet 4Q is about 4 mm, and the thickness of the gypsum board 5P containing the glass fiber nonwoven fabric. The thickness may be about 9.5 mm, and the thickness of the floor finish plate 6P may be about 12 mm.
Further, in this example, the sound-absorbing laminated plate 7P is, for example, a square plate having a length of one side of 905 mm, and the gypsum plate 5P containing the glass fiber nonwoven fabric is, for example, having a long side having a length of 1,820 mm and a short side having a length of 1820 mm. A rectangular plate having a length of 910 mm and a floor finishing plate 6P having a long side having a length of 1,820 mm and a short side having a length of 145 mm are provided. The gypsum board 5P is arranged so that the joints thereof do not overlap with each other, and the joints of the gypsum board 5P containing the glass fiber nonwoven fabric and the joints of the floor finishing board 6P are also arranged so as not to overlap.

In this example, as shown in FIG. 1 (b), the gypsum board 5P containing the glass fiber non-woven fabric is stepped in the width direction, and the base plywood 4P is fixed using the fixing member 8 such as a nail or a screw. By joining the gypsum board 5P containing glass fiber nonwoven fabric, the sound absorbing laminate 7P is fixed to the gypsum board 5P containing glass fiber nonwoven fabric.
The base plywood 4P is fixed to a gypsum board 5P containing a glass fiber nonwoven fabric near its corners.
Specifically, as shown in FIG. 1A, the sound absorbing laminates 7P1 and 7P2, which are adjacent to each other in the length direction, of the sound absorbing laminate 7P are placed on one side (left side) in the width direction. At positions C11 and C21 near the corners, it is fixed to the gypsum board 5P1 containing the glass fiber nonwoven fabric located above the sound absorbing laminates 7P1 and 7P2, and one side (left side) in the width direction of the sound absorbing laminates 7P1 and 7P2. Are fixed to the same gypsum board 5P1 containing glass nonwoven fabric at positions C32 and C42 near corners on the sound absorbing laminates 7P1 and 7P2 side (right side).
Thus, the four sound-absorbing laminates 7P1 to 7P4 are connected via the single gypsum board 5P1 containing the glass fiber nonwoven fabric, so that the floor rigidity can be increased without increasing the thickness of the base plywood 4P. it can. Therefore, it is possible to suppress sinking of the floor while securing sufficient floor impact noise reduction performance.

Further, as shown in FIG. 1B, the sound-absorbing laminates 7P1 and 7P2 are placed above the sound-absorbing laminates 7P1 and 7P2 at positions C12 and C22 near corners on the other side (right side) in the width direction. It is fixed to the gypsum board 5P2 containing glass fiber nonwoven fabric located on the right side in the width direction of the gypsum board 5P1 containing glass fiber nonwoven fabric, and is adjacent to the other side (right side) in the width direction of the sound absorbing laminates 7P1 and 7P2. The sound absorbing laminates 7P5 and 7P6 may be fixed to the gypsum board 5P2 containing glass fiber nonwoven fabric at corners C52 and C62 on the sound absorbing laminates 7P1 and 7P2 side (left side).
As described above, if the sound absorbing laminated plates 7P1 and 7P2 are fixed to the gypsum plates 5P1 and 5P2 containing the glass fiber nonwoven fabric at the corners C11 and C12 and C21 and C22 on both sides in the width direction, respectively, the sound absorption laminates 7P1 and 7P2 are adjacent in the width direction. The sound-absorbing laminates 7P1, 7P3, 7P5 and the sound-absorbing laminates 7P2, 7P4, 7P6 are connected via the gypsum plates 5P1, 5P2 containing the glass fiber nonwoven fabric, which are the plate members constituting the sound insulating base layer 5. The rigidity can be effectively increased.

By the way, if all of the sound absorbing laminate 7P is fixed to the gypsum board 5P containing glass fiber nonwoven fabric, the floor rigidity becomes too high and sufficient floor impact sound reduction performance cannot be obtained. The ratio of the sound absorbing laminate 7P is preferably 30% to 90%. Thereby, it is possible to reliably suppress the sinking of the floor while ensuring sufficient floor impact sound reduction performance.
The ratio of the sound-absorbing laminate 7P fixed to the gypsum board 5P containing the glass fiber nonwoven fabric is determined by the size of the chamber, the sizes of the gypsum board 5P and the sound absorbing laminate 7P containing the glass fiber nonwoven fabric, and the hardness of the inorganic fiber board 3P. May be determined as appropriate.

Embodiment 2 FIG.
In the first embodiment, the sound absorbing layer 3 is formed of the inorganic fiber board 3P. However, as shown in FIGS. 2A and 2B, a connection point between the sound absorbing laminated board 7P and the gypsum board 5P containing the glass fiber nonwoven fabric. The sound absorbing layer 3 located below the fixed portion C (hereinafter, referred to as a fixed portion C) is provided with a rubber sound absorbing portion 9a provided on the slab surface 2S and a rubber sound absorbing portion 9b provided on the rubber portion 9a. If the base plywood 4P is fixed to the gypsum board 5P containing the glass fiber nonwoven fabric and the plate portion 9b of the rubber sound absorbing layer 9 while being composed of the layer 9, it is possible to effectively suppress sinking of the floor. it can.
The rubber portion 9a of the rubber sound-absorbing layer 9 is formed of a rubber block body having a square plate surface, a flat plate portion 9b side, and an uneven surface on the side in contact with the slab surface 2S. Is composed of, for example, structural plywood.
The convex portion 91 of the rubber block body is constituted by, for example, a mountain-shaped protrusion having a spherical or dot-shaped distal end so as to be placed in a point-like contact state on the slab surface 2S. In addition, the concave portion 92 is formed by a concave portion that is concaved in a direction approaching the plate portion 9b side and has a bottom formed in a spherical concave shape.

As the rubber constituting the rubber portion 9a, for example, a rubber having a relatively high Shore A hardness of 40 to 70 degrees is preferably used so as to prevent sinking of the floor finish layer 6.
In addition, by joining the plate portion 9b and the rubber portion 9a with an adhesive or the like and fixing the rubber portion 9a to the slab surface 2S using an adhesive or the like, the unevenness of the slab surface 2S can be effectively absorbed. At the same time, it is possible to improve the lightweight floor impact noise reduction performance.
The plate portion 9b of the rubber sound absorbing layer 9 is preferably a flat plate including all four fixing points C (C11, C21 and C32, C42, or C12, C22 and C52, C62, etc.). In this case, for example, the plate portion 9b is preferably made of a structural plywood having a square shape with a side length of about 90 mm and a thickness dimension D of about 12 mm.
Further, the rubber portion 9a is formed in a rectangular parallelepiped shape in which the size of one side of the square plate surface is 90 mm and the thickness is about 13 mm, similarly to the plate portion 9b.

Next, a method will be described in which the sound absorbing layer 3 located below the fixing point C is a rubber sound absorbing layer 9 and the sound absorbing layer 3 located other than below the fixing point C is a fiber sound absorbing layer formed of inorganic fibers. I do.
First, as shown in FIG. 3A, a sound-absorbing laminate 7P ′ is prepared by cutting a predetermined amount of the inorganic fibers located below the fixing portion C among the inorganic fiber plates 3P of the sound-absorbing laminate 7P. As shown in FIG. 3 (b), the rubber sound absorbing layer 9 is provided on the cut portions S1 to S4 of the four adjacent sound absorbing laminates 7P'1 to 7P'4, and the plate portion 9b is on the base plywood 4P side. Then, it is inserted and fixed so that the rubber portion 9a is on the slab surface 2S side. In this example, the rubber sound-absorbing layer 9 was manufactured so as to include all four fixing portions C. Therefore, the size of the inorganic fiber to be cut is, of course, one-fourth the area of the plate portion 9b. Becomes
For example, when the fixing points are C11 and C21 and C32 and C42, the lower left fiber-absorbing layer of the sound-absorbing laminate 7P1, the upper-left fiber-absorbing layer of 7P2, and the lower-right fiber-absorbing sound of the sound-absorbing laminate 7P3. The layer and the fiber-absorbing layer on the upper right side of 7P4 are each cut by about 45 mm, and the rubber sound-absorbing layer 9 is inserted and fixed in the cut portion, so that the base as shown in FIG. A configuration in which the rubber sound-absorbing layer 9 is disposed below the fixing portions C11 and C21 and C32 and C42 of the plywood 4P, and the sound-absorbing laminated plate 7P is disposed at other positions can be realized.
When the sound-absorbing laminates 7P1 and 7P2 are fixed to the gypsum plates 5P1 and 5P2 containing the glass fiber non-woven fabric at the corners C11 and C12 and C21 and C22 on both sides in the width direction, respectively, the sound-absorbing laminates 7P1 and 7P2 The lower left and right fiber sound absorbing layers, the upper and lower fiber sound absorbing layers of 7P2, the lower right and left fiber sound absorbing layers of the sound absorbing laminate 7P3, and the upper right and left fiber sound absorbing layers of 7P4 are each cut by about 45 mm, The rubber sound-absorbing layer 9 may be inserted and fixed in the cut portion.
A rubber sound-absorbing layer may be provided on each of the sound-absorbing laminates 7P having the fixing portions C. However, if the rubber sound-absorbing layer 9 includes all four fixing portions C as in this example, four base plywoods are provided. Since 4P is fixed to one glass fiber nonwoven gypsum board 5P and one rubber sound absorbing layer 9 plate portion 9b, it is possible to more effectively suppress sinking of the floor. .

  As described above, the present invention has been described using the embodiment, but the technical scope of the present invention is not limited to the scope described in the first and second embodiments. It is apparent to those skilled in the art that various changes or improvements can be added to the first and second embodiments. It is apparent from the appended claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

For example, in the first and second embodiments, the sound-absorbing laminate 7P is a square plate, and the gypsum board 5P containing a glass fiber nonwoven fabric is a rectangular board. Or a rectangular plate. In any case, if the base plywood 4P is fixed to the gypsum board 5P containing the glass fiber nonwoven fabric at the corners, the floor rigidity can be increased without increasing the thickness of the base layer. In addition, it is possible to suppress sinking of the floor while ensuring sufficient floor impact noise reduction performance.
Further, in the first and second embodiments, the gypsum board 5P containing the glass fiber nonwoven fabric is stepped jointing, but as shown in FIG. 4 (a), the straight joints are straight joints and the horizontal joints are straight. It may be.
In the first and second embodiments, the rubber sound-absorbing layers 9 are provided at the lower portions on both sides in the width direction of the base plywood 4P. However, as shown in FIG. 4B , the rubber sound-absorbing layers 9 are staggered. You may do it .
In short, if the base plywood 4P is fixed to the gypsum board 5P containing the glass fiber nonwoven fabric or the gypsum board 5P containing the glass fiber nonwoven fabric and the plate portion 9b of the rubber sound absorbing layer 9 near the corner thereof, It is possible to effectively improve the floor rigidity and suppress the sinking of the floor .

1 floor structure, 2 floor slab, 2S slab surface, 3 sound absorbing layer, 3P inorganic fiber board,
4 damping base layer, 4P base plywood, 4Q damping sheet, 5 sound insulation base layer,
5P glass fiber nonwoven gypsum board, 6 floor finishing layer, 6P floor finishing board,
7P sound absorbing laminate, 8 fixing member, 9 rubber sound absorbing layer, 9a rubber part, 9b plate part.

Claims (3)

A floor structure including a floor slab, a sound absorbing layer provided on a slab surface of the floor slab, a base layer provided on the sound absorbing layer, and a finishing layer provided on the base layer,
The underlayer includes a vibration damping underlayer provided on the sound absorbing layer side, and a sound insulation underlayer provided on the finishing layer side,
The vibration-damping underlayer, the sound-insulating underlayer, and the finishing layer are laminated on the sound-absorbing layer,
The sound insulation base layer and the vibration suppression base layer each include a plurality of plate members,
The plate member constituting the vibration-damping base layer is arranged on a potato joint where vertical joints and horizontal joints are linear ,
When the extension direction of one side of the plate member constituting the sound insulation base layer is a width direction and the extension direction of the other side is the length direction, the plate member constituting the sound insulation base layer has the width Horseshoe lining in the direction,
Plate member constituting the vibration damping underlayer in the width direction on both sides of the corner portions of the plate members constituting the vibration damping underlayer is fixed to the plate member constituting the sound insulation underlayer,
When the plate member constituting the vibration-damping underlayer is a fixed portion where the portion fixed to the plate member constituting the sound-insulating underlayer is a fixed portion,
The sound absorbing layer located at the lower portion of the fixed portion is a rubber sound absorbing layer including a rubber block placed on the slab surface and a plate provided on the rubber block,
Floor structure absorbing layer located at a position other than the lower portion of the fixed portion to said fibrous sound absorbing layer der Rukoto formed by inorganic fibers. Floor structure according to claim 1, wherein the plate members constituting the vibration damping underlayer, characterized in that it is fixed to the plate portion of the plate member and the rubber backing layer constituting the sound insulating underlayer . The floor structure according to claim 2 , wherein the rubber block body of the rubber sound absorbing layer is adhered and fixed to a slab surface.

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