JP2020051145A - Sound insulation floor structure, and construction method of the same - Google Patents

Abstract

To suppress breakage of floor finishing materials 17,17,... such as a stone material and a tile due to sinking even in a soundproof floor substrate structure of a low floor type.SOLUTION: A sound insulation floor substrate structure, in which floor finishing materials 17,17,... comprising a brittle material such as a stone material and a tile are constructed on a surface, comprises: a plate-shaped buffer material 1 comprising a nonwoven fabric; lower rigid plates 7,7,... comprising a plurality of plywood plates and laminated on the buffer materials 1; and upper rigid plates 10,10,... comprising a plurality of plywood plates thinner than the lower rigid plates 7,7,... and laminated on the lower rigid plates 7,7,.... The floor finishing materials 17,17,... such as a stone material and a tile are constructed on the upper rigid plates 10,10,.... A joint portion 11 of the upper rigid plates 10,10,... is positioned at a site different from a joint portion 8 of the lower rigid plates 7,7,... in plan view.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sound-insulating floor structure, a sound-insulating floor structure in which a floor finishing material is constructed on the sound-insulating floor structure, and a construction method thereof.

  Generally, when a stone or a tile is constructed on a floor as a floor finishing material, wet construction using mortar is performed. Since these stones and tiles are brittle brittle materials, it is necessary to make the ground surface flat without irregularities in order to avoid the occurrence of cracks and the like that break when stepped on. Required. In addition, since floor impact noise generated from stone or tile floor finishing materials is transmitted to the floor through the mortar, there is a disadvantage that it is difficult to use it as it is in a room on the second floor or above.

  Therefore, as shown in Patent Document 1, for example, a floor material is installed on a floor slab via a support to form a double floor, and a discarded base material is provided on the floor material, and a stone or tile is placed thereon. It is common practice to apply floor finishing materials. In this double-floor structure, it is possible to prevent the occurrence of unevenness on the surface by the discarded base material, and to reduce floor impact noise by the interposition of the support.

  However, on the other hand, the double-floor floor structure not only increases the labor required for construction, but also the height of the floor material is raised by the support and the floor position is raised, so it is possible to avoid lowering the ceiling accordingly. Absent. In addition, when a certain room has a double floor, the floor surface is higher than the other rooms, causing a step, which causes a problem in making the room barrier-free.

  On the other hand, as shown in Patent Document 2, there has been proposed a structure in which a cushioning material is arranged on a floor slab, a plywood base material is laminated thereon, and a tile is attached on the base material with an adhesive. .

  In this case, since the floor structure is not a double-floor structure, it is possible to lower the floor position by reducing the thickness of the floor base material, and the propagation effect of the floor impact sound to the downstairs is suppressed by the cushioning effect of the cushioning material. .

JP-A-2004-232314 JP 2007-9554 A

  However, in the case of Patent Document 2, when a large downward load is applied to the tile, the cushioning material is compressed to some extent and the base material sinks. Therefore, when a part of the plurality of base materials sinks, a step occurs at the joint between the base material and another base material adjacent to the base material, and the tile straddles the base material on both sides of the joint material. If the tiles are stuck or the joints between the tiles are located on the joints, stress may be concentrated on the tiles or the joints at the step portions, and the tiles may be cracked or the joints may be displaced.

  The present invention has been made in view of the above, and an object of the present invention is to improve the sound-insulating floor base structure using a cushioning material, so that even a low-floor type sound-insulating floor base structure can be used for sinking. Accordingly, it is to suppress occurrence of cracks or the like in a floor finishing material such as a stone or a tile.

  In order to achieve the above object, according to the present invention, instead of directly applying a floor finish such as a stone or a tile to a rigid plate laminated on a cushioning material, another layer of rigid plate is interposed between the two. By interposing, the joint portions of the two-layered rigid plate material are shifted from each other, so that the movement of the step generated in the joint portion between the rigid plate materials due to the sinking of the lower rigid plate material is hardly transmitted to the floor finishing material, The stress concentration on the floor finishing material was prevented.

  Specifically, the first invention is a sound-insulating floor foundation structure in which a floor finishing material made of a brittle material including a stone or a tile is applied to a surface thereof, and a plate-like cushioning material and a laminate on the cushioning material are provided. A plurality of lower rigid plate members, and a plurality of upper rigid plate members laminated on the lower rigid plate members, and the floor finishing material can be installed on the upper rigid plate members, The joint part of the plate is different from the joint part of the lower rigid plate in a plan view.

  In the first aspect of the present invention, the sound insulating floor base structure comprises a plurality of lower rigid plate members and a plurality of upper rigid plate members thereon laminated on a plate-like cushioning material. Floor coverings such as stones and tiles are constructed on the upper rigid plate of the structure, so the lightening effect of the light floor impact sound applied to the floor coverings to the downstairs is suppressed by the cushioning effect of the cushioning material And the effect of reducing the floor impact noise can be obtained. In addition, since the structure is such that the upper and lower rigid plate members are merely laminated on the cushioning material, the thickness of the floor base structure can be reduced to lower the floor position.

  If a large downward load is applied to the floor covering, such as stone or tile, installed on the sound-insulating floor foundation structure, the cushioning material at the load position is compressed and deformed, causing the lower rigid plate to sink. At this time, the sinking tends to cause a step at the joint between the lower rigid plate and another rigid plate adjacent thereto, but the joint between the lower rigid plate and the upper part Since the joints between the upper rigid plate and the plurality of upper rigid plates are located at mutually different positions, the lower rigid plate does not sink, and the movement of the step due to the sink does not transmit to the floor finishing material. The stress can be prevented from being concentrated on the substrate. Therefore, even if the floor finishing material is a brittle material such as a stone or a tile, it is possible to prevent cracking or the like.

  A second invention is characterized in that, in the first invention, the cushioning material and the lower rigid plate are integrated by bonding. This can save time and labor for bonding at the construction site, and prevent the lower rigid plate material from being displaced with respect to the cushioning material, thereby improving workability.

  According to a third invention, in the first or second invention, the upper rigid plate is fixed to the lower rigid plate. In this case, the rigid plate material of the upper and lower two layers is integrated to increase rigidity, and accordingly, the floor finishing material made of a brittle material is more difficult to be broken. In addition, when a fixing tool such as a screw is used for fixing, the time required for fixing is shorter than in the case of bonding with an adhesive, so that workability can be improved.

  A fourth invention is characterized in that, in any one of the first to third inventions, the cushioning material is made of a nonwoven fabric. Thus, a buffer material that is effective in achieving the effects of the first invention can be obtained.

  A fifth invention is characterized in that in any one of the first to fourth inventions, the thickness of the cushioning material is 10 mm or more and 30 mm or less. If the thickness of the cushioning material is thinner than 10 mm, the effect of reducing the lightweight floor impact sound will be insufficient, while if it exceeds 30 mm, the sinking amount when stepping on the floor surface becomes large and the fluffy feeling becomes remarkable. In addition, the possibility of cracking of the floor finishing material increases.

  Therefore, according to the fifth aspect, it is possible to obtain the effect of reducing the light floor impact sound and obtain the thickness of the cushioning material that is desirable for preventing the floor finishing material from cracking.

  The sixth invention relates to a sound insulation floor structure, and this sound insulation floor structure is characterized in that a floor finishing material is constructed on an upper surface of an upper rigid plate of any one of the sound insulation floor foundation structures of the first to fifth inventions. Features.

  According to the sixth aspect, similarly to the first aspect, a sound insulation floor structure having a high effect of reducing a lightweight floor impact sound and in which a floor finishing material made of a brittle material such as a stone or a tile is hard to crack can be obtained.

  A seventh invention is a method of constructing the sound insulation floor structure according to the sixth invention, in which a cushioning material and a plurality of lower rigid plate materials laminated thereon are laid on a floor slab. A plurality of upper rigid plate members are laminated on the lower rigid plate member so that joints between the upper rigid plate members are located at positions different from joints between the lower rigid plate members, and the upper rigid plate member is placed on the lower rigid plate member. It is characterized by fixing to a rigid board and applying a floor finishing material on the upper rigid board.

  In the seventh invention, after the cushioning material and the plurality of lower rigid plate materials laminated thereon are laid on the floor slab, the plurality of upper rigid plate materials are laid on these lower rigid plate materials. However, the joints between the upper rigid plate members are stacked so as to be different from the joint portions between the lower rigid plate members, and the upper rigid plate member is fixed to the lower rigid plate member. Finally, a floor finish is applied on the upper rigid plate. This makes it possible to easily construct a low-floor type sound insulation floor structure having a high effect of reducing a light floor impact sound.

  As described above, according to the present invention, a plurality of lower rigid plate members are laminated on a plate-like cushioning material, and a plurality of upper rigid plate members are stacked thereon, and the joint portion of the upper rigid plate member has a lower rigid member. Lightweight floor impact sound added to the floor finish material by stacking it differently from the joints of the plate material in plan view and installing the floor finish material made of brittle material such as stone or tile on the upper rigid plate material Can be suppressed by the cushioning effect of the cushioning material, whereby the effect of reducing floor impact noise can be obtained, and the thickness of the basement structure can be reduced to lower the floor position. Furthermore, even if the cushioning material is compressed and deformed by the downward load applied to the floor finishing material and the lower rigid plate material sinks, the movement of the step due to the sinking of the lower rigid plate material is prevented by the upper rigid plate material. It is difficult to transmit to the floor finishing material, and it is possible to prevent stress from being concentrated on the floor finishing material, thereby preventing cracking.

FIG. 1 is a cross-sectional view showing a sound-insulating floor base structure and a sound-insulating floor structure according to an embodiment of the present invention. FIG. 2 is a perspective view showing the sound insulating floor base structure and the sound insulating floor structure. FIG. 3 is a cross-sectional view showing a sound-insulating floor base structure near a wall. FIG. 4 is a diagram illustrating an example of a lightweight floor impact sound level when the floor finishing material is a tile. FIG. 5 is a diagram illustrating an example of a lightweight floor impact sound level when the floor finishing material is marble. FIG. 6 is a diagram showing the sinking amount of the floor finishing material according to the thickness of the nonwoven fabric as the cushioning material.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The description of the embodiments below is merely an example in nature, and is not intended to limit the present invention, its applications, and its uses.

  1 and 2 show a sound floor foundation structure and a sound insulation floor structure according to an embodiment of the present invention. The sound insulation floor structure is constructed on a concrete floor slab F of an RC house, for example. 1 and 2, reference numeral 1 denotes a plate-like cushioning material laid on a floor slab F. The cushioning material 1 is obtained by cutting a high-density nonwoven fabric having a density of, for example, about 60 to 96K into a plate shape. The thickness is preferably 10 mm or more and 30 mm or less. If the thickness of the cushioning material 1 is less than 10 mm, the cushioning material 1 is excessively compressed and crushed by the rigid plate materials 7 and 10 and the floor finishing material 17 which are placed and laminated on the upper side, and the floor impact sound is lightweight. This is because the performance of reducing the insufficiency becomes insufficient. If the thickness of the cushioning material 1 is 10 mm or more, the thicker the thickness, the higher the performance of reducing the light floor impact sound, but on the other hand, the greater the thickness of the floor base material 1 as a whole, the higher the floor height at the time of construction. Not only that, but also the amount of sinking of the floor surface due to the compression deformation of the cushioning material 1 itself increases, so that the thickness is set to 30 mm or less. In the present embodiment, the cushioning member 1 has a vertically long rectangular plate shape with a thickness of 14 mm, a width of 910 mm, and a length of 1820 mm, for example.

  In the nonwoven fabric constituting the cushioning material 1, solid fibers and hollow fibers are mixed as main raw materials, and these are entangled and integrally bonded by a core-sheath fiber as a binder. The solid fiber is, for example, a polyethylene terephthalate (PET) fiber having a fiber thickness of 15 dtex, a fiber length of 51 mm, and a melting point of about 260 ° C. The hollow fiber is, for example, a fiber thickness of 14.4 dtex, a fiber length of 64 mm, and a melting point of about 260 ° C. It consists of polyethylene terephthalate (PET) hollow fiber at ℃. The core-sheath fiber as a binder is, for example, a core fiber made of polyethylene terephthalate (PET) fiber having a fiber thickness of 2.2 dtex, a fiber length of 51 mm, and a melting point of about 260 ° C., and is disposed around the entire core fiber. And a sheath fiber made of low-melting polyethylene terephthalate (PET) fiber having a fiber length of 51 d and a melting point of about 110 ° C. The mixing ratio of the solid fiber, the hollow fiber, and the core-sheath fiber in the nonwoven fabric is, for example, 45% for the solid fiber, 15% for the hollow fiber, and 40% for the core-sheath fiber in weight ratio.

  A plurality of lower rigid plate members 7, 7,... Are laminated on the upper surface of the cushioning material 1, and the lower rigid plate members 7 are integrated with the cushioning material 1 by bonding with an adhesive. As the adhesive, for example, a vinyl acetate adhesive or the like is used. The lower rigid plate 7 is made of, for example, plywood, and has a thickness of, for example, 12 mm and is slightly smaller than the thickness of the cushioning material 1. The plurality of lower rigid plate members 7, 7,... Are arranged side by side with a gap therebetween in consideration of expansion and contraction, and joint portions 8 are formed between adjacent lower rigid plate members 7, 7. Have been. In the present embodiment, the lower rigid plate 7 is, for example, a vertically long rectangular plate having a thickness of 14 mm, a width of 910 mm, and a length of 1820 mm.

  A plurality of upper rigid plate members 10, 10,... Are laminated on the lower rigid plate members 7, 7,..., And the upper rigid plate member 10 is fixed to the lower rigid plate member 7 with screws, staples, or the like. .. (In the illustrated example, screws) are fixed and integrated. The upper rigid plate 10 is also made of, for example, plywood, and has a thickness of, for example, 9 mm and is thinner than the lower rigid plate 7. The plurality of upper rigid plate members 10, 10,... Are also arranged side by side with a gap therebetween in consideration of expansion and contraction, and joint portions 11 are formed between adjacent upper rigid plate members 10, 10,. Have been. In the present embodiment, the upper rigid plate member 10 is, for example, a vertically long rectangular plate shape having a thickness of 9 mm, a width of 910 mm, and a length of 1820 mm.

  The upper rigid plate 10 is for increasing the rigidity of the floor base structure for the purpose of increasing the durability of the floor finishing material 17 made of a brittle material such as a stone or a tile, and the lower rigid plate 7 is formed of, for example, an upper rigid. It is used for fixing the plate material 10.

  The above-described cushioning material 1, the lower rigid plate members 7, 7,... And the upper rigid plate members 10, 10,... On the buffer member 1 constitute the sound-insulating floor base structure according to the embodiment of the present invention. Among them, the cushioning material 1 and the lower rigid plates 7, 7, ... are bonded and integrated, and the upper rigid plates 10, 10, ... are fixed to the lower rigid plates 7, 7, ... at the construction site. Is done.

  A plurality of floor finishing materials 17, 17,... Can be constructed on the upper rigid plate materials 10, 10,... In the sound insulation floor foundation structure, and the construction constitutes a sound insulation floor structure. Each floor finishing material 17 is, for example, an elongated plate made of a brittle material such as a stone or a tile. The upper rigid plate materials 10, 10,... Are arranged in a state where a plurality of floor finishing materials 17, 17,. ... fixed on the top by adhesion. In the present embodiment, the floor finishing material 17 is, for example, a rectangular plate having a thickness of 9 mm, a width of 450 mm, and a length of 450 mm.

  Furthermore, in the above-mentioned sound insulation floor foundation structure, the joint part 11 between the upper rigid plate members 10 is located at a position different from the joint part 8 between the lower rigid plate members 7 in plan view.

  As shown in FIG. 3, in the sound insulation floor base structure near the wall, the cushioning material 1 is partially cut to form a portion without the cushioning material 1 below the lower rigid plate 7. The edge joist 20 is arranged on the floor slab F of that portion at an interval from the cushioning material 1. At this time, the joist 20 has a plurality of 2 mm-thick PVC mats 22 arranged, for example, at a pitch of 300 mm on the lower surface (back surface) of a long and thin plywood base material 21 having a thickness of 12 mm and a width of 45 mm, for example. In this case, the height of the joist 20 is the same as that of the cushioning material 1. At this time, the upper rigid plate member 10 is also laminated on the lower rigid plate member 7 above the joist 20, and the side end faces of the joist 20, the lower rigid plate member 7, and the upper rigid plate member 10 are flush with each other in the vertical direction. It is arranged so as to be aligned.

  Next, a method of constructing the sound insulation floor structure (sound insulation floor base structure) will be described. On the floor slab F, the cushioning material 1 of the sound-insulating floor base structure and a plurality of lower rigid plate members 7, 7,...

  Next, a plurality of upper rigid plate members 10, 10,... Are laminated on the lower rigid plate members 7, 7,. At this time, the joint portions 11 between the adjacent upper rigid plate members 10, 10,... Are arranged at positions different from the joint portions 8 between the lower rigid plate members 7, 7,. The upper rigid plate members 10, 10,... Stacked in this manner are fixed to the lower rigid plate members 7, 7,. As described above, the sound insulating floor base structure is formed.

  Finally, floor finishing materials 17, 17,..., Such as stones and tiles, are arranged on the upper rigid plate materials 10, 10,. As described above, it is possible to easily construct a low-floor type sound insulation floor structure having a high effect of reducing a light floor impact sound.

  Therefore, in this embodiment, a plurality of lower rigid plate members 7, 7,... And a plurality of upper rigid plate members 10, 10,. A floor structure 17, such as a stone or a tile, is constructed on the upper rigid plate members 10, 10,... Of the sound insulation floor structure to form a sound insulation floor structure. ing. Therefore, the propagation of the lightweight floor impact sound applied to the floor finishing materials 17, 17,... To the downstairs can be suppressed by the cushioning effect of the cushioning material 1, and the floor impact sound can be reduced.

  Further, since the sound insulating floor base structure is a structure in which the upper and lower rigid plate members 10 and 7 are merely laminated on the cushioning material 1, the thickness of the sound insulating floor base structure is reduced to reduce the floor position. It can be lowered, and a high ceiling height can be secured.

  Further, if a large downward load is applied to the floor finishing materials 17, 17,..., Such as stones and tiles, which are constructed on the sound-insulating floor foundation structure, for example, by stepping on, etc., the cushioning material 1 at the load position is accordingly attached. The lower rigid plate 7 tends to sink due to compression deformation, and the sink may cause a step at the joint 8 between the lower rigid plate 7 and another lower rigid plate 7 adjacent thereto. However, since the joint portion 8 between the lower rigid plate members 7 and 7 is located at a different position from the joint portion 11 between the upper rigid plate members 10 and 10 above, the sinking of the lower rigid plate member 7 occurs. Without this, the movement of the step due to the sinking is not transmitted to the floor finishing material 17, so that the concentration of stress on the floor finishing material 17 can be prevented. Therefore, even if the floor finishing material 17 is a brittle material such as a stone or a tile, it is possible to prevent cracks and displacement of joints between the floor finishing materials 17 and 17.

  Further, since the cushioning member 1 and the lower rigid plate member 7 are integrated by bonding, the labor for bonding them can be saved at the construction site. Moreover, the lower rigid plate members 7, 7,... These improve the workability at the construction site.

  Further, since the upper rigid plate member 10 is fixed to the lower rigid plate member 7, the rigid plate members 10 and 7 of the upper and lower layers are integrated to increase the rigidity as a whole, and accordingly, the floor finishing material made of brittle material. Cracks 17 and displacement of the joints are more unlikely to occur. Further, since the fixture 13 is used for fixing the upper and lower rigid plates 10 and 7, the time required for fixing is shorter than in the case of bonding with an adhesive, and the workability can be improved. In the present invention, the bonding may be performed by an adhesive, and the structure is also included.

  Further, since the thickness of the cushioning material 1 is 10 mm or more and 30 mm or less, the effect of reducing the lightweight floor impact sound can be effectively obtained, and when the sinking amount of the floor finishing material 17 is within the appropriate range, the stepping is performed. This makes it difficult to feel the uncomfortable feeling of fluffy feeling, and the occurrence of cracks or the like in the floor finishing material 17 can be more effectively prevented.

(Other embodiments)
In the above-described embodiment, the cushioning member 1 and the lower rigid plate member 7 are integrated by bonding. However, the lower rigid plate member 7 may be simply laminated on the cushioning member 1 without bonding. However, as described above, it is preferable to integrate them in that the workability can be improved and the lower rigid plate 7 can be prevented from being shifted from the cushioning material 1.

  Next, a specific embodiment will be described.

(Test 1)
On a 200 mm-thick concrete floor slab, a test body having a floor finishing material fixed to the sound-insulating floor structure having the configuration of the above embodiment was laid.

  As the cushioning material, a nonwoven fabric having a thickness of 3 mm, 7 mm, 10 mm, 14 mm, 18 mm, a width of 900 mm, a length of 1800 mm, and a density of 86 K, a thickness of 12 mm, a density of 100 K and other dimensions are the same as above Three types of nonwoven fabric and glass wool (GW) having a thickness of 12 mm, a density of 96K and other dimensions same as those described above were used.

The lower rigid plate was a plywood having a thickness of 12 mm, and the upper rigid plate was a plywood having a thickness of 9 mm. Flooring is the marble tiles and thickness 13mm in thickness 9 mm, the tile is 15.4 kg / ^{m 2,} also marble was constructed respectively 33.9kg / ^{m 2.} Thus, the test specimen had a thickness of 33 to 50 mm, a width of 900 mm, and a length of 1800 mm.

  The center of the specimen was vibrated by a tapping machine, a sound level meter was placed in a reverberation room below the concrete floor slab, and the transmitted sound was measured. The sound insulation performance of the specimen was evaluated with respect to the octave band center frequency. FIG. 4 shows the results when the floor finish is a tile, and FIG. 5 shows the results when the marble is a marble.

  As shown in FIGS. 4 and 5, the floor structure provided with the sound-insulating floor base structure of the present invention reduces the weight of the floor impact sound, especially when the thickness of the cushioning material (nonwoven fabric) is 10 mm or more. It can be seen that light floor impact noise is greatly reduced.

(Test 2)
A test specimen was prepared in the same manner as in Test 1, and the floor finishing material was limited to a tile having a thickness of 9 mm, and the tile was applied at 15.4 kg / m ² . The cushioning material was a non-woven fabric, and its thickness was changed to 24-34 mm (the density was 86K). Other dimensions are the same as the test specimen of Test 1.

  A local load of 20 to 100 kg was applied to a part of the floor finishing material (tile) having a diameter of 80 mm to the test specimen, and the sinking amount of the test specimen was measured. FIG. 6 shows the result.

  According to FIG. 6, when the thickness of the cushioning material (nonwoven fabric) is 30 mm or less, the amount of sinking is small, and even when the local load is 100 kg, it stays on the order of 3 mm. From this, it is clear that when the thickness of the cushioning material (non-woven fabric) is 30 mm or less, it is possible to prevent cracking of the tile by a small sinking amount, and it is difficult to generate a fluffy feeling when stepping on the floor surface. became.

  The present invention provides a low-floor type sound-insulating floor base structure capable of suppressing cracking of a floor finishing material such as a stone or a tile due to sinking, while having a high effect of reducing a lightweight floor impact sound. Useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 1 Buffer material 7 Lower rigid board 8 Joint 10 Upper rigid board 11 Joint 13 Fixing 17 Floor finishing material

The present invention, sound insulation floor structure, and to a construction method.

  Generally, when a stone or a tile is constructed on a floor as a floor finishing material, wet construction using mortar is performed. Since these stones and tiles are brittle brittle materials, it is necessary to make the ground surface flat without irregularities in order to avoid the occurrence of cracks and the like that break when stepped on. Required. In addition, since floor impact noise generated from stone or tile floor finishing materials is transmitted to the floor through the mortar, there is a disadvantage that it is difficult to use it as it is in a room on the second floor or above.

  Therefore, as shown in Patent Document 1, for example, a floor material is installed on a floor slab via a support to form a double floor, and a discarded base material is provided on the floor material, and a stone or tile is placed thereon. It is common practice to apply floor finishing materials. In this double-floor structure, it is possible to prevent the occurrence of unevenness on the surface by the discarded base material, and to reduce floor impact noise by the interposition of the support.

  However, on the other hand, the double-floor floor structure not only increases the labor required for construction, but also the height of the floor material is raised by the support and the floor position is raised, so it is possible to avoid lowering the ceiling accordingly. Absent. In addition, when a certain room has a double floor, the floor surface is higher than the other rooms, causing a step, which causes a problem in making the room barrier-free.

  On the other hand, as shown in Patent Document 2, there has been proposed a structure in which a cushioning material is arranged on a floor slab, a plywood base material is laminated thereon, and a tile is attached on the base material with an adhesive. .

  In this case, since the floor structure is not a double-floor structure, it is possible to lower the floor position by reducing the thickness of the floor base material, and the propagation effect of the floor impact sound to the downstairs is suppressed by the cushioning effect of the cushioning material. .

JP-A-2004-232314 JP 2007-9554 A

However, in the case of Patent Document 2, when a large downward load is applied to the tile, the cushioning material is compressed to some extent and the base material sinks. Therefore, when the sunken part of the plurality of base material, a step occurs at joints between the other base material adjacent to the base sheet, tiles extend over the base material of the joint portion on both sides If the tiles are stuck or the joints between the tiles are located on the joints, stress may be concentrated on the tiles or the joints at the step portions, and the tiles may be cracked or the joints may be displaced.

  The present invention has been made in view of the above, and an object of the present invention is to improve the sound-insulating floor base structure using a cushioning material, so that even a low-floor type sound-insulating floor base structure can be used for sinking. Accordingly, it is to suppress occurrence of cracks or the like in a floor finishing material such as a stone or a tile.

  In order to achieve the above object, according to the present invention, instead of directly applying a floor finish such as a stone or a tile to a rigid plate laminated on a cushioning material, another layer of rigid plate is interposed between the two. By interposing, the joint portions of the two-layered rigid plate material are shifted from each other, so that the movement of the step generated in the joint portion between the rigid plate materials due to the sinking of the lower rigid plate material is hardly transmitted to the floor finishing material, The stress concentration on the floor finishing material was prevented.

Specifically, the first invention is directed to a plate- like cushioning material laid on a floor slab, a lower rigid plate made of a plurality of plywood laminated on the cushioning material, An upper rigid plate composed of a plurality of plywood laminated on a plate, and a floor finishing material made of a brittle material including a stone or a tile, which is constructed on the upper rigid plate, and a thickness of the lower rigid plate. Is thicker than the upper rigid plate, the upper rigid plate and the lower rigid plate are fixed and integrated, and the joint of the upper rigid plate is located at a position different from the joint of the lower rigid plate in plan view. It is characterized by.

In the first aspect of the invention, the sound insulation floor structure is in the laid plate-shaped cushioning material on the floor slab, a lower rigid plate comprising a plurality of plywood, the upper comprising a plurality of plywood thereon and a rigid plate are stacked, since the floor covering of the stone or tile or the like is applied over the upper side rigidity plate member of that, that the light floor impact sounds which joined the floor covering is propagated to the downstairs It can be suppressed by the buffer effect of the buffer material, and the effect of reducing the floor impact sound can be obtained. Further, the rigidity plate member upper and lower layers made of plywood on the buffer material is a structure only are laminated, it can be a floor structure thickness thinner to lower the floor position.

Then, if, when a large downward load to the floor covering, such as a stone or tiles are construction on top of the sound insulation floor structure is applied, the lower rigid plate material buffer material loading position is compressed and deformed with it The sink is going to sink, and the sinking tends to cause a step at the joint between the lower rigid plate and another rigid plate adjacent thereto, but the joint between the lower rigid plate and the upper part thereof Since the joints between the upper rigid plate and the plurality of upper rigid plates are located at different positions from each other, the lower rigid plate does not sink, and the movement of the step due to the sink is not transmitted to the floor finishing material, and the floor finishing is performed. It is possible to prevent stress from being concentrated on the material. Therefore, even if the floor covering material is a brittle material such as a stone or a tile, cracking or the like can be prevented, and a sound insulating floor structure in which the floor covering material is hard to crack can be obtained .

In addition, since the upper rigid plate and the lower rigid plate are fixed, the rigid plate made of the upper and lower two layers of plywood is integrated to increase rigidity, and accordingly, the floor finishing material made of a brittle material is further increased. It is hard to crack. In addition, when a fixing tool such as a screw is used for fixing, the time required for fixing is shorter than in the case of bonding with an adhesive, so that workability can be improved.

A second invention is characterized in that, in the first invention, the cushioning material and the lower rigid plate are integrated by bonding. This can save time and labor for bonding at the construction site, and prevent the lower rigid plate material from being displaced with respect to the cushioning material, thereby improving workability .

A third invention is the first or second inventions in Oite, the cushioning material characterized by comprising the non-woven fabric. Thus, a buffer material that is effective in achieving the effects of the first invention can be obtained.

A fourth invention is characterized in that, in any one of the first to third inventions, the thickness of the cushioning material is 10 mm or more and 30 mm or less. When the thickness of the cushioning material is thinner than 10 mm, the effect of reducing the light floor impact sound becomes insufficient, while when the thickness exceeds 30 mm, the sinking amount when stepping on the floor surface becomes large and the fluffy feeling becomes remarkable. In addition, the possibility of cracking of the floor finishing material increases.

Therefore, according to the fourth aspect, the effect of reducing the lightweight floor impact sound can be obtained, and the thickness of the cushioning material that is desirable for preventing cracking of the floor finishing material can be obtained .

A fifth invention is a method for constructing the sound insulation floor structure of the first invention, in which a cushioning material and a plurality of lower rigid plate materials laminated thereon are laid on a floor slab. A plurality of upper rigid plate members are laminated on the lower rigid plate member so that joints between the upper rigid plate members are located at positions different from joints between the lower rigid plate members, and the upper rigid plate member is placed on the lower rigid plate member. It is characterized by fixing to a rigid board and applying a floor finishing material on the upper rigid board.

In the fifth invention, after the cushioning material and the plurality of lower rigid plate members laminated thereon are laid on the floor slab, the plurality of upper rigid plate members are placed on these lower rigid plate members. However, the joints between the upper rigid plate members are stacked so as to be different from the joint portions between the lower rigid plate members, and the upper rigid plate member is fixed to the lower rigid plate member. Finally, a floor finish is applied on the upper rigid plate. This makes it possible to easily construct a low-floor type sound insulation floor structure having a high effect of reducing a light floor impact sound.

As described above, according to the present invention, a plurality of lower rigid plate members made of plywood are laminated on a plate-like cushioning material laid on a floor slab , and a plurality of lower rigid plate members thinner than the lower rigid plate members are formed thereon. The upper rigid plate made of plywood is laminated so that the joints of the upper rigid plate are different from the joints of the lower rigid plate in plan view, and the upper and lower rigid plates are fixedly integrated with each other, and are placed on the upper rigid plate. By installing floor coverings made of brittle materials such as stones and tiles, the propagation of the light floor impact noise applied to the floor coverings downstairs to the downstairs is suppressed by the cushioning effect of the cushioning material, and the floor impact noise is reduced. A reduction effect is obtained, and the floor position can be lowered by reducing the thickness of the floor base structure. In addition, the rigidity of the floor base can be increased by fixing and integrating two layers of plywood rigid plate material in the upper and lower layers , and the cushioning material is compressed and deformed by the downward load applied to the floor finish material, and the lower rigid plate material sinks. Even if the lower rigid board is submerged, the movement of the step due to the sinking of the lower rigid board is prevented by the upper rigid board, making it difficult to transmit to the floor finishing material, preventing stress from concentrating on the floor finishing material, and preventing cracking. Can be.

Figure 1 is a cross-sectional view showing the engagement Ru sound insulation floor structure to the embodiment of the present invention. Figure 2 is a perspective view showing a sound insulation floor structure. FIG. 3 is a cross-sectional view showing a sound-insulating floor base structure near a wall. FIG. 4 is a diagram illustrating an example of a lightweight floor impact sound level when the floor finishing material is a tile. FIG. 5 is a diagram illustrating an example of a lightweight floor impact sound level when the floor finishing material is marble. FIG. 6 is a diagram showing the sinking amount of the floor finishing material according to the thickness of the nonwoven fabric as the cushioning material.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The description of the embodiments below is merely an example in nature, and is not intended to limit the present invention, its applications, and its uses.

1 and 2 show the engagement Ru sound insulation floor structure to the embodiment of the present invention, the sound insulation floor structure is construction example on a concrete floor slab F of RC building collective housing. 1 and 2, reference numeral 1 denotes a plate-like cushioning material laid on a floor slab F. The cushioning material 1 is obtained by cutting a high-density nonwoven fabric having a density of, for example, about 60 to 96K into a plate shape. The thickness is preferably 10 mm or more and 30 mm or less. If the thickness of the cushioning material 1 is less than 10 mm, the cushioning material 1 is excessively compressed and crushed by the rigid plate materials 7 and 10 and the floor finishing material 17 which are placed and laminated on the upper side, and the floor impact sound is lightweight. This is because the performance of reducing the insufficiency becomes insufficient. If the thickness of the cushioning material 1 is 10 mm or more, the thicker the thickness, the higher the performance of reducing the light floor impact sound, but, on the other hand, the greater the thickness of the entire floor base material 1 and the higher the floor surface at the time of construction Not only that, but also the amount of sinking of the floor surface due to the compression deformation of the cushioning material 1 itself increases, so that the thickness is set to 30 mm or less. In the present embodiment, the cushioning member 1 has a vertically long rectangular plate shape with a thickness of 14 mm, a width of 910 mm, and a length of 1820 mm, for example.

  In the nonwoven fabric constituting the cushioning material 1, solid fibers and hollow fibers are mixed as main raw materials, and these are entangled and integrally bonded by a core-sheath fiber as a binder. The solid fiber is, for example, a polyethylene terephthalate (PET) fiber having a fiber thickness of 15 dtex, a fiber length of 51 mm, and a melting point of about 260 ° C. The hollow fiber is, for example, a fiber thickness of 14.4 dtex, a fiber length of 64 mm, and a melting point of about 260 ° C. It consists of polyethylene terephthalate (PET) hollow fiber at ℃. The core-sheath fiber as a binder is, for example, a core fiber made of polyethylene terephthalate (PET) fiber having a fiber thickness of 2.2 dtex, a fiber length of 51 mm, and a melting point of about 260 ° C., and is disposed around the entire core fiber. And a sheath fiber made of low-melting polyethylene terephthalate (PET) fiber having a fiber length of 51 d and a melting point of about 110 ° C. The mixing ratio of the solid fiber, the hollow fiber, and the core-sheath fiber in the nonwoven fabric is, for example, 45% for the solid fiber, 15% for the hollow fiber, and 40% for the core-sheath fiber in weight ratio.

A plurality of lower rigid plate members 7, 7,... Are laminated on the upper surface of the cushioning material 1, and the lower rigid plate members 7 are integrated with the cushioning material 1 by bonding with an adhesive. As the adhesive, for example, a vinyl acetate adhesive or the like is used. The lower rigid plate 7 is made of, for example, plywood, and has a thickness of, for example, 12 mm and is slightly smaller than the thickness of the cushioning material 1. The plurality of lower rigid plate members 7, 7,... Are arranged side by side with a gap therebetween in consideration of expansion and contraction, and joint portions 8 are formed between adjacent lower rigid plate members 7, 7. Have been. In the present embodiment, the lower rigid plate 7 is, for example, a vertically long rectangular plate having a thickness of 12 mm, a width of 910 mm, and a length of 1820 mm.

  A plurality of upper rigid plate members 10, 10,... Are laminated on the lower rigid plate members 7, 7,..., And the upper rigid plate member 10 is fixed to the lower rigid plate member 7 with screws, staples, or the like. .. (In the illustrated example, screws) are fixed and integrated. The upper rigid plate 10 is also made of, for example, plywood, and has a thickness of, for example, 9 mm and is thinner than the lower rigid plate 7. The plurality of upper rigid plate members 10, 10,... Are also arranged side by side with a gap therebetween in consideration of expansion and contraction, and joint portions 11 are formed between adjacent upper rigid plate members 10, 10,. Have been. In the present embodiment, the upper rigid plate member 10 is, for example, a vertically long rectangular plate shape having a thickness of 9 mm, a width of 910 mm, and a length of 1820 mm.

  The upper rigid plate 10 is for increasing the rigidity of the floor base structure for the purpose of increasing the durability of the floor finishing material 17 made of a brittle material such as a stone or a tile, and the lower rigid plate 7 is formed of, for example, an upper rigid. It is used for fixing the plate material 10.

Above the cushioning material 1, the lower the rigidity plate member 7, 7 thereon, ... and the upper rigid plate 10, 10, ... sound insulation floor foundation structure is composed of and. Among them, the cushioning material 1 and the lower rigid plates 7, 7, ... are bonded and integrated, and the upper rigid plates 10, 10, ... are fixed to the lower rigid plates 7, 7, ... at the construction site. Is done.

A plurality of floor finishing materials 17, 17,... Can be constructed on the upper rigid plate materials 10, 10,... In the above-mentioned sound insulation floor foundation structure, and the construction constitutes the sound insulation floor structure according to the embodiment of the present invention. ing. Each floor finishing material 17 is, for example, an elongated plate made of a brittle material such as a stone or a tile, and the upper rigid plate materials 10, 10,... Are arranged in a state where a plurality of floor finishing materials 17, 17,. ... fixed on the top by adhesion. In the present embodiment, the floor finishing material 17 is, for example, a rectangular plate having a thickness of 9 mm, a width of 450 mm, and a length of 450 mm.

  Furthermore, in the above-mentioned sound insulation floor foundation structure, the joint part 11 between the upper rigid plate members 10 is located at a position different from the joint part 8 between the lower rigid plate members 7 in plan view.

  As shown in FIG. 3, in the sound insulation floor base structure near the wall, the cushioning material 1 is partially cut to form a portion without the cushioning material 1 below the lower rigid plate 7. The edge joist 20 is arranged on the floor slab F of that portion at an interval from the cushioning material 1. At this time, the joist 20 has a plurality of 2 mm-thick PVC mats 22 arranged, for example, at a pitch of 300 mm on the lower surface (back surface) of a long and thin plywood base material 21 having a thickness of 12 mm and a width of 45 mm, for example. In this case, the height of the joist 20 is the same as that of the cushioning material 1. At this time, the upper rigid plate member 10 is also laminated on the lower rigid plate member 7 above the joist 20, and the side end faces of the joist 20, the lower rigid plate member 7, and the upper rigid plate member 10 are flush with each other in the vertical direction. It is arranged so as to be aligned.

It will now be described the construction method of the sound insulating floor structure. On the floor slab F, the cushioning material 1 of the sound-insulating floor base structure and a plurality of lower rigid plate members 7, 7,...

  Next, a plurality of upper rigid plate members 10, 10,... Are laminated on the lower rigid plate members 7, 7,. At this time, the joint portions 11 between the adjacent upper rigid plate members 10, 10,... Are arranged at positions different from the joint portions 8 between the lower rigid plate members 7, 7,. The upper rigid plate members 10, 10,... Stacked in this manner are fixed to the lower rigid plate members 7, 7,. As described above, the sound insulating floor base structure is formed.

  Finally, floor finishing materials 17, 17,..., Such as stones and tiles, are arranged on the upper rigid plate materials 10, 10,. As described above, it is possible to easily construct a low-floor type sound insulation floor structure having a high effect of reducing a light floor impact sound.

  Therefore, in this embodiment, a plurality of lower rigid plate members 7, 7,... And a plurality of upper rigid plate members 10, 10,. A floor structure 17, such as a stone or a tile, is constructed on the upper rigid plate members 10, 10,... Of the sound insulation floor structure to form a sound insulation floor structure. ing. Therefore, the propagation of the lightweight floor impact sound applied to the floor finishing materials 17, 17,... To the downstairs can be suppressed by the cushioning effect of the cushioning material 1, and the floor impact sound can be reduced.

  Further, since the sound insulating floor base structure is a structure in which the upper and lower rigid plate members 10 and 7 are merely laminated on the cushioning material 1, the thickness of the sound insulating floor base structure is reduced to reduce the floor position. It can be lowered, and a high ceiling height can be secured.

  Further, if a large downward load is applied to the floor finishing materials 17, 17,..., Such as stones and tiles, which are constructed on the sound-insulating floor foundation structure, for example, by stepping on, etc., the cushioning material 1 at the load position is accordingly attached. The lower rigid plate 7 tends to sink due to compression deformation, and the sink may cause a step at the joint 8 between the lower rigid plate 7 and another lower rigid plate 7 adjacent thereto. However, since the joint portion 8 between the lower rigid plate members 7 and 7 is located at a different position from the joint portion 11 between the upper rigid plate members 10 and 10 above, the sinking of the lower rigid plate member 7 occurs. Without this, the movement of the step due to the sinking is not transmitted to the floor finishing material 17, so that the concentration of stress on the floor finishing material 17 can be prevented. Therefore, even if the floor finishing material 17 is a brittle material such as a stone or a tile, it is possible to prevent cracks and displacement of joints between the floor finishing materials 17 and 17.

  Further, since the cushioning member 1 and the lower rigid plate member 7 are integrated by bonding, the labor for bonding them can be saved at the construction site. Moreover, the lower rigid plate members 7, 7,... These improve the workability at the construction site.

  Further, since the upper rigid plate member 10 is fixed to the lower rigid plate member 7, the rigid plate members 10 and 7 of the upper and lower layers are integrated to increase the rigidity as a whole, and accordingly, the floor finishing material made of brittle material. Cracks 17 and displacement of the joints are more unlikely to occur. Further, since the fixture 13 is used for fixing the upper and lower rigid plates 10 and 7, the time required for fixing is shorter than in the case of bonding with an adhesive, and the workability can be improved. In the present invention, the bonding may be performed by an adhesive, and the structure is also included.

  Further, since the thickness of the cushioning material 1 is 10 mm or more and 30 mm or less, the effect of reducing the lightweight floor impact sound can be effectively obtained, and when the sinking amount of the floor finishing material 17 is within the appropriate range, the stepping is performed. This makes it difficult to feel the uncomfortable feeling of fluffy feeling, and the occurrence of cracks or the like in the floor finishing material 17 can be more effectively prevented.

(Other embodiments)
In the above-described embodiment, the cushioning member 1 and the lower rigid plate member 7 are integrated by bonding. However, the lower rigid plate member 7 may be simply laminated on the cushioning member 1 without bonding. However, as described above, it is preferable to integrate them in that the workability can be improved and the lower rigid plate 7 can be prevented from being shifted from the cushioning material 1.

  Next, a specific embodiment will be described.

(Test 1)
On a 200 mm-thick concrete floor slab, a test body having a floor finishing material fixed to the sound-insulating floor structure having the configuration of the above embodiment was laid.

  As the cushioning material, a nonwoven fabric having a thickness of 3 mm, 7 mm, 10 mm, 14 mm, 18 mm, a width of 900 mm, a length of 1800 mm, and a density of 86 K, a thickness of 12 mm, a density of 100 K and other dimensions are the same as above Three types of nonwoven fabric and glass wool (GW) having a thickness of 12 mm, a density of 96K and other dimensions same as those described above were used.

The lower rigid plate was a plywood having a thickness of 12 mm, and the upper rigid plate was a plywood having a thickness of 9 mm. Flooring is the marble tiles and thickness 13mm in thickness 9 mm, the tile is 15.4 kg / ^{m 2,} also marble was constructed respectively 33.9kg / ^{m 2.} Thus, the test specimen had a thickness of 33 to 50 mm, a width of 900 mm, and a length of 1800 mm.

  The center of the specimen was vibrated by a tapping machine, a sound level meter was placed in a reverberation room below the concrete floor slab, and the transmitted sound was measured. The sound insulation performance of the specimen was evaluated with respect to the octave band center frequency. FIG. 4 shows the results when the floor finish is a tile, and FIG. 5 shows the results when the marble is a marble.

  As shown in FIGS. 4 and 5, the floor structure provided with the sound-insulating floor base structure of the present invention reduces the weight of the floor impact sound, especially when the thickness of the cushioning material (nonwoven fabric) is 10 mm or more. It can be seen that light floor impact noise is greatly reduced.

(Test 2)
A test specimen was prepared in the same manner as in Test 1, and the floor finishing material was limited to a tile having a thickness of 9 mm, and the tile was applied at 15.4 kg / m ² . The cushioning material was a nonwoven fabric, and its thickness was changed to 24-34 mm (the density was 86K). Other dimensions are the same as the test specimen of Test 1.

  A local load of 20 to 100 kg was applied to a part of the floor finishing material (tile) having a diameter of 80 mm to the test specimen, and the sinking amount of the test specimen was measured. FIG. 6 shows the result.

  According to FIG. 6, when the thickness of the cushioning material (nonwoven fabric) is 30 mm or less, the amount of sinking is small, and even when the local load is 100 kg, it stays on the order of 3 mm. From this, it is clear that when the thickness of the cushioning material (nonwoven fabric) is 30 mm or less, the tile can be prevented from being cracked by a small sinking amount, and a fluffy feeling when stepping on the floor surface is hardly generated. became.

  The present invention provides a low-floor type sound-insulating floor base structure capable of suppressing cracking of a floor finishing material such as a stone or a tile due to sinking while having a high reduction effect on a lightweight floor impact sound. Useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 1 Buffer material 7 Lower rigid board 8 Joint 10 Upper rigid board 11 Joint 13 Fixing 17 Floor finishing material

Claims (7)

A floor covering made of a brittle material including a stone or a tile is a sound-insulating floor base structure constructed on the surface,
Plate-shaped cushioning material,
A plurality of lower rigid plate members laminated on the cushioning material,
Comprising a plurality of upper rigid plate materials laminated on the lower rigid plate material,
The floor finishing material can be constructed on the upper rigid plate material,
The joint structure of the upper rigid board is different from the joint of the lower rigid board in a plan view. In claim 1,
A sound-insulating floor structure, wherein the cushioning material and the lower rigid plate are integrated by bonding. In claim 1 or 2,
A sound-insulating floor base structure, wherein the upper rigid plate is fixed to the lower rigid plate. In any one of claims 1 to 3,
A sound-insulating floor structure, wherein the cushioning material is made of non-woven fabric. In any one of claims 1 to 4,
A sound-insulating floor base structure, wherein the thickness of the cushioning material is 10 mm or more and 30 mm or less.   A sound-insulating floor structure, wherein a floor finishing material is provided on an upper surface of an upper rigid plate of the sound-insulating floor foundation structure according to any one of claims 1 to 5. It is a method of constructing the sound insulation floor structure according to claim 6,
On the floor slab, lay a cushioning material and a plurality of lower rigid plate materials laminated on it,
A plurality of upper rigid plate members are laminated on the lower rigid plate member so that joints between the upper rigid plate members are located at positions different from joints between the lower rigid plate members, and the upper rigid plate member is lowered. Fixed to the side rigid plate,
A method for constructing a sound-insulating floor structure, wherein a floor finishing material is constructed on the upper rigid plate.

Images