JP6480783B2 - Sound insulation floor structure - Google Patents

Description

  The present invention relates to a sound insulation floor structure constructed on a beam.

  Conventionally, floors of prefabricated apartment buildings, etc., can be constructed by laying ALC (lightweight aerated concrete) or extruded cement board on the beam and laying wooden flooring on it as a floor finish. Has been done. Moreover, in apartment houses and the like, the impact of the impact sound of the upper floors on the lower floors is significant, and a construction method using a combination of various materials has been adopted to improve the sound insulation performance of the floors. However, floors with improved sound insulation performance have many construction methods using a combination of various materials, and there are drawbacks such as high cost and complicated processes required for construction by the combination construction method.

  Therefore, as a general floor structure, as shown in the cross-sectional view of FIG. 14, a leg material 101, a cushioning material 102, and a threading material 103 are placed on top of a lower floor plate 100 such as a cement plate 104 (including a nail and the like). ) And the like, and a floor finishing material 105 is laid on top of the threading material 103.

  On the other hand, the floor impact sound as described above includes light impact impact sound and heavy impact impact sound. Light impact impact sound can be improved with floor finish (flooring material), etc. It depends on the material of the floor material that was constructed. Therefore, in order to reduce the weight impact sound, it is necessary to use a flooring material having excellent sound insulation performance against the weight impact sound, but it may be difficult to adopt in terms of workability and cost.

  In particular, it is difficult to insulate sound in the low sound range (for example, 250 Hz or less) of heavy impact sound, and conventionally, means for ensuring sound insulation performance by increasing the thickness of the flooring and increasing the weight may be employed. However, in the case of this means, it is necessary to increase the size of the base steel frame that supports the flooring due to the increase in the weight of the flooring, leading to an increase in cost and a reduction in the room area. Especially in prefabricated houses, since each structural member is standardized, if the thickness or module is changed depending on the type of flooring to obtain the required sound insulation performance, the design of the housing must also be changed accordingly. It must be a significant cost increase.

  As a prior art of this type, there is a double floor assembly method in which a plastic hollow plate having a large number of holes arranged in parallel on the lower floor is spread to support the upper floor as a floor finishing material (for example, patent document) 1).

JP 60-59265 A

  However, in the double floor assembling method as described in Patent Document 1, as shown in FIG. 14 described above, the hollow plate is made of concrete as a method of fixing the hollow plate spread on the lower floor and the upper floor supported by the hollow plate. A method of directly fixing to the lower floor with screws or the like is adopted, and the upper floor is fixed to the directly fixed hollow plate.

  Therefore, in such a structure, as shown in FIG. 15, the impact sound 110 acting on the floor finishing material 105 propagates directly to the lower floor board 100 via the screws 104, and the sound insulation performance against the weight impact sound of the lower floor board 100 is Not enough. In addition, even in the space between the floor finishing material and the lower floor board, the impact sound that propagates through the air layer in this space and reaches the lower floor board remains, so that it is not possible to reduce the weight impact sound.

  Then, an object of this invention is to provide the sound-insulating floor structure which can improve the performance which interrupts a weight impact sound, suppressing the weight increase of a flooring.

  In order to achieve the above object, the present invention is a floor structure configured by laying a floor finishing material on an upper part of a lower floor board, and a cushioning material and a threading material are vertically stacked on the upper surface of the lower floor board. The threading material and the cushioning material are attached to the lower floor board by a fixing member having a length that penetrates the threading material and the cushioning material from the upper part of the threading material and reaches the hollow portion of the lower floor board. The fixing member is held so as to be movable up and down with respect to the lower floor board, and a floor finishing material is laid on the upper part of the threading member. “Mounting” in this specification and claims includes fixing that allows some movement.

  With this configuration, the cushioning material and the threading material are attached to the upper part of the lower floor board with a fixing member, and the fixing member is held in a state that can move up and down with respect to the lower floor board. The weight impact sound from the floor finish is buffered by the cushioning material, and the propagation from the fixed member to the lower floor seat is suppressed, so that the performance of blocking the weight impact sound can be improved. Moreover, it is possible to improve the weight impact sound blocking performance while suppressing an increase in the weight of the flooring.

  Further, a leg member having a predetermined height is provided between the lower floor board and the cushioning material, and the leg material and the cushioning material are arranged at a plurality of positions at predetermined intervals on the upper surface of the lower floor board. May be. The “predetermined interval” in the specification and claims refers to an interval suitable for supporting a floor finish.

  If comprised in this way, the escape route of air can be made between a lower floor board and a floor finishing material, and the interruption | blocking performance can be improved more by escaping and attenuating a weight impact sound.

  In addition, a leg having a predetermined height is provided between the lower floor board and the cushioning material, and the leg material and the cushioning material are staggered on the upper surface of the lower floor board at a plurality of positions with predetermined intervals. It may be arranged.

  If comprised in this way, the escape route of air can be made between a lower floor board and a floor finishing material, and the interruption | blocking performance can be improved more by escaping and attenuating a weight impact sound.

  Further, the floor structure is configured by laying a floor finish on the upper part of the lower floor board, and the lower floor board has a plurality of ribs arranged in parallel on the upper surface, and the buffer material is passed through the upper surface of the rib. And is passed through the cushioning material by a fixing member having a length that penetrates the threading material, the cushioning material, and the rib from the upper part of the threading material and reaches the hollow portion of the lower floor board. A material is fixed to the lower floor plate, the fixing member is held on the lower floor plate in a vertically movable state, and a floor finishing material is laid on the upper part of the threading material.

  With this configuration, the cushioning material and the threading material are attached to the upper part of the ribs of the lower floor board with a fixing member, and the fixing member is held in a state that can move up and down with respect to the lower floor board. Further, the weight impact sound from the floor finishing material is buffered by the buffer material, and the propagation from the fixing member to the lower floor seat is suppressed, so that the performance of blocking the weight impact sound can be improved. Moreover, it is possible to improve the weight impact sound blocking performance while suppressing an increase in the weight of the flooring.

  Moreover, the said buffer material may be arrange | positioned in multiple places at predetermined intervals on the parallel rib provided in the upper surface of the said lower floor board.

  If comprised in this way, the escape route of air can be made between a lower floor board and a floor finishing material, and the interruption | blocking performance can be improved more by escaping and attenuating a weight impact sound.

  Moreover, the said buffer material may be arrange | positioned in multiple places at predetermined intervals in zigzag form on the parallel rib provided in the upper surface of the said lower floor board.

  If comprised in this way, the escape route of air can be made between a lower floor board and a floor finishing material, and the interruption | blocking performance can be improved more by escaping and attenuating a weight impact sound.

  Further, the fixing member may have a fixing pin having a drill portion at the tip.

  If comprised in this way, a fixing pin can form an attachment hole by its own drill part at the time of attachment of a fixing member, and can maintain the holding state of a fixing pin at the rear end part of a drill part after attachment. .

  Further, the fixing member may have a fixing pin provided with an entrance / exit that enters and exits in the radial direction at the tip.

  If comprised in this way, at the time of attachment of a fixing member, an in / out part will be settled in a radial direction, and it can insert in an attachment hole, and after an attachment, an in / out part will protrude in the radial direction and a holding state of a fixed pin can be maintained.

  ADVANTAGE OF THE INVENTION According to this invention, the floor structure which lays a lower floor board on a beam can be made into the sound insulation floor structure excellent in the sound insulation performance of a heavy impact sound, and it becomes possible to aim at the improvement of a living environment.

FIG. 1 is a cross-sectional view showing a sound insulating floor structure according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a part when an impact force is applied to the sound insulating floor structure shown in FIG. 1 from above. 3 is a drawing showing a first example of a fixing member used in the sound insulating floor structure shown in FIG. 1, wherein (A) is a perspective view before holding, (B) is a perspective view in a penetrating state, and (C). FIG. 4B is a partially enlarged perspective view of (B). 4 is a drawing showing a second example of a fixing member used in the sound insulating floor structure shown in FIG. 1, (A) is a perspective view before holding, (B) is an enlarged perspective view before holding, (C). (D) is a perspective view in a held state, (E) is an enlarged perspective view in a held state. FIG. 5 is a cross-sectional view showing a sound insulation floor structure according to a second embodiment of the present invention. 6 is a cross-sectional view showing a part of the sound insulation floor structure shown in FIG. 5 when an impact force is applied from above. FIG. 7 is a cross-sectional view showing a sound insulation floor structure according to a third embodiment of the present invention. 8 is a drawing showing the laying process of the sound-insulating floor structure shown in FIG. 5, (A) is a perspective view of a state in which a floor panel is arranged, and (B) is a state in which legs, cushioning materials and threading materials are fixed. (C) is a perspective view of the state which constructed the floor finishing material. FIG. 9 is a perspective view, partly in section, of the sound insulating floor structure shown in FIG. FIG. 10 is a partial cross-sectional perspective view of an example of a sound insulating floor structure different from the sound insulating floor structure shown in FIG. 9. FIGS. 11A and 11B are schematic views showing air escape paths in the sound insulation floor structure shown in FIGS. 9 and 10, wherein FIG. 11A shows an example of a staggered arrangement, and FIG. 11B shows an example of a parallel arrangement. 12 is a perspective view showing a configuration for conducting a sound insulation performance test of the sound insulation floor structure shown in FIG. FIG. 13 is a graph showing the results of the sound insulation performance test of FIG. FIG. 14 is a cross-sectional view showing a conventional floor structure. FIG. 15 is a cross-sectional view showing a part of the floor structure shown in FIG. 14 when an impact force is applied from above.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiment, the lower floor board 10 of solid concrete and the lower floor board 15 of the extrusion-molded cement board which has a hollow part are demonstrated as an example of a lower floor board.

[First Embodiment]
As shown in FIG. 1, the sound insulation floor structure 1 of the first embodiment is a sound insulation floor structure 1 constructed on a solid concrete lower floor board (such as a PC floor board) 10. An anchor member 11 to be described later is embedded at a predetermined position on the upper surface of the lower floor board 10, and leg members 20 and cushioning materials 21 are vertically stacked at the position, and are arranged at a plurality of positions with predetermined intervals. ing. A threading material 22 is provided so as to extend over the upper portions of the buffer material 21.

  And by the fixing pin 31 of the fixing member 30 which has the length which penetrates the buffer material 21 and the leg material 20 from the upper part of the threading material 22, and reaches the hollow part 14 of the anchor member 11 embedded in the lower floor board 10, These are attached to the lower floor board 10. A floor finish 23 is provided on the threading member 22.

  The anchor member 11 is made of a metal or a high-strength resin and has a cylindrical shape whose inside is hollow, and is for forming the hollow portion 14 in the solid lower floor board 10. The anchor member 11 is embedded in the lower floor board 10 and fixed with mortar or resin adhesive.

  As described above, the fixing pin 31 that attaches the threading material 22, the cushioning material 21, and the leg material 20 to the lower floor board 10 has the head portion 32 in contact with the upper surface of the threading material 22, and the tip drill portion 33 is positioned below. The anchor member 11 embedded in the floor board 10 is held in a state of reaching the hollow portion 14. Details of the fixing pin 31 will be described later.

  As shown in FIG. 2, according to such a sound insulation floor structure 1, since the fixing pin 31 of the fixing member 30 is attached in a state where it can be moved up and down as will be described later, the floor finishing material 23 is impacted from above. When acting, the vertical movement of the fixing pin 31 is allowed, and the impact sound 110 added from the floor finishing material 23 can be prevented from being directly propagated to the lower floor board 10.

  In addition, since the mounting of the fixing member 30 with the fixing pin 31 is in a state in which it can be moved up and down, the entire floor finishing material 23 can sink, and the floor finishing material 23 and the lower floor board 10 can be submerged. The impact sound can be attenuated by letting the air 40 in the space part escape to the surroundings.

[Example of fixing member]
3A, 3 </ b> B, and 3 </ b> C are drawings illustrating a first example of the fixing member 30 used in the sound insulating floor structure 1. In these drawings, a part is shown in a cross-sectional view or a perspective view. As shown in FIG. 3A, the fixing member 30 of the first example has a fixing pin 31 having a large-diameter head 32 and a drill portion 33 at the tip of the shaft portion 34. The drill part 33 can form the attachment hole 13 by itself in the wall part 12 or the lower floor board 10 of the anchor member 11 when the fixing pin 31 is screwed or driven in the axial direction. Therefore, the fixing pin 31 of this example is an example used when the mounting hole 13 is not previously formed in the lower floor board 10, and when the fixing pin 31 is attached by the drill portion 33 provided at the tip of the fixing member 30. A mounting hole 13 is formed in the lower floor board 10 by itself. The shaft portion 34 of the fixing pin 31 has a length such that the rear end portion of the drill portion 33 penetrates the buffer material 21 and the leg material 20 from the upper portion of the threading material 22 and reaches the inside of the anchor member 11 as described above. Yes.

  In this example, the anchor member 11 embedded in the lower floor board 10 is used together with the fixing pin 31. The anchor member 11 is formed in a cylindrical shape that is attached to a hole formed in the lower floor board 10. A wall portion 12 having a predetermined thickness is formed on the upper portion of the anchor member 11 by a concrete-based cured body, a high-strength resin-based cured body, or the like, and a hollow portion 14 is formed in the back thereof.

  As shown in FIGS. 3B and 3C, according to the fixing member 30, as described above, the buffer member 21, the leg member 20, and the wall portion 12 of the anchor member 11 are arranged from the upper part of the threading member 22. Type in to penetrate. Thereby, since the fixing pin 31 is held in a state having a slight gap with the lower floor board 10, the drill portion 33 can be held so that it can be moved up and down by the hollow portion 14 of the anchor member 11. As described in 1 and 2, it is possible to prevent the impact on the floor finishing material 23 from directly propagating to the lower floor board 10 via the fixing member 30.

  4A, 4 </ b> B, 4 </ b> C, 4 </ b> D, and 4 </ b> E are drawings showing a second example of the fixing member 30 used in the sound insulating floor structure 1. As shown in FIG. 4A, the fixing member 30 of the second example has a fixing pin 35 having a large-diameter head portion 36 and an entrance / exit portion 37 that protrudes in the radial direction from the tip end of the shaft portion 38. ing. The entrance / exit portion 37 is formed in a shape having a hook-like portion with a protruding amount that increases in the axial direction from the tip toward the head, and a rear end that stands up toward the axis of the fixing pin 35. The shaft portion 38 of the fixing pin 35 has a length at which the rear end portion of the entrance / exit portion 37 reaches the hollow portion 14 of the anchor member 11 from the upper portion of the threading member 22 through the buffer material 21 and the leg material 20 as described above. It has become.

  Also in this example, the anchor member 11 embedded in the lower floor board 10 is used together with the fixing pin 35. As described above, the anchor member 11 has a wall portion 12 having a predetermined thickness formed of a concrete-based cured body, a high-strength resin-based cured body, or the like, and is formed in a cylindrical shape embedded in the lower floor board 10.

  As shown in FIG. 4 (B), according to the fixing pin 35 of the fixing member 30 of this example, when the fixing pin 35 is inserted into the mounting hole 13 previously vacated in the wall portion 12 of the anchor member 11 from the front end of the fixing pin 35, As shown in FIG. 4C, the height h1 of the portion 37 can be inserted into the mounting hole 13 and at a height h2 that is equal to or smaller than the hole diameter H. And as shown in FIG.4 (D), when the entrance / exit part 37 is inserted deeper than the wall part 12 through the attachment hole 13 of the anchor member 11, the entrance / exit part 37 will protrude to the original height. Thus, when the entrance / exit part 37 protrudes to the original height, since it becomes larger than the diameter of the attachment hole 13, it cannot come out. As shown in FIG. 4E, in this state, the fixing member 30 is attached to the anchor member 11, that is, the lower floor board 10 in a state where it can move up and down. Thereby, since the fixing pin 35 is held in a state having a slight gap with the lower floor board 10, as described with reference to FIGS. Propagation directly to 10 can be suppressed.

[Second Embodiment]
FIG. 5 is a cross-sectional view showing a sound insulation floor structure according to the second embodiment. The sound insulation floor structure 2 of the second embodiment is an example in which the lower floor board 15 is an extruded cement board. In addition, the same code | symbol is attached | subjected to the structure same as the said 1st Embodiment, and the description is abbreviate | omitted.

  Also in this embodiment, the leg material 20 and the buffer material 21 are vertically stacked at predetermined positions of the lower floor board 15 and arranged at a plurality of positions with a predetermined interval, and above the plurality of positions of the buffer material 21. A threading member 22 is provided so as to cross. Then, these are attached to the lower floor board 15 by the fixing pin 31 (35) of the fixing member 30 which has a length extending from the upper part of the threading material 22 through the buffer material 21 and the leg material 20 to the hollow portion 16 of the lower floor board 15. It is attached. A floor finish 23 is provided on the threading member 22. In this embodiment, since the extrusion-molded cement board has the hollow portion 16, the distal end portions (the drill portion 33 and the entrance / exit portion 37) of the fixing pins 31 and 35 of the fixing member 30 are attached so as to reach the hollow portion 16.

  In this embodiment, the anchor member 11 described above may be used for the extrusion-molded cement board. Also in this embodiment, both the fixing pins 31 and 35 described above can be used. Since the operational effects of the fixing pins 31 and 35 are the same as those of the above-described embodiment, the description thereof is omitted.

  As shown in FIG. 6, the sound insulation floor structure 2 of this embodiment also holds the fixing pin 31 (35) of the fixing member 30 in a state in which it can move up and down, so that the impact sound of the floor finishing material 23 is generated. Propagation directly to the lower floor board 15 can be suppressed. In addition, when the impact sound is applied, the entire floor finishing material 23 can sink without the fixing member 30 being stretched, so that the space is between the floor finishing material 23 and the lower floor board 15. The air 40 can escape to the surroundings and the impact sound can be attenuated.

[Third Embodiment]
FIG. 7 is a cross-sectional view showing a sound insulation floor structure according to the third embodiment. In the sound insulation floor structure 3 of this embodiment, in addition to the structure of the sound insulation floor structure 2 of the second embodiment, an example in which a plurality of ribs 17 are arranged in parallel on the upper surface of the lower floor board 15 formed of an extruded cement board. It is. The ribs 17 are provided in the extending direction of the partition wall portion 18 (FIG. 9) formed between the hollow portions 16 of the lower floor material 15 that is an extruded cement board. Moreover, the rib 17 may be integrally formed with the lower flooring material 15, or a separate member may be used. Further, the ribs 17 may be provided at the same intervals as the partition walls 18, but may be provided at every two locations of the partition walls 18 or at the same intervals as the through material 22 provided on the upper surface of the lower floor board 15. In addition, the same code | symbol is attached | subjected to the structure same as another said 2nd Embodiment, and the description is abbreviate | omitted.

  In this embodiment, on the ribs 17 of the lower floor board 15, the leg members 20 and the cushioning material 21 are vertically stacked and arranged at a plurality of locations at predetermined intervals. A threading member 22 is provided so as to extend over the area. In this example, a leg member 20, a buffer member 21 and a threading member 22 having the same width as the rib 17 are provided. And, by the fixing pin 31 (35) of the fixing member 30 having a length extending from the upper part of the threading material 22 to the hollow portion 16 of the lower floor board 15 through the buffer material 21, the leg material 20, and the rib 17 Is attached to the lower floor board 15. A floor finish 23 is provided on the threading member 22.

  Also in this embodiment, since the lower floor plate 15 of the extrusion-molded cement board has the hollow portion 16, the distal end portion (the drill portion 33 and the entrance / exit portion 37) of the fixing pin 31 (35) of the fixing member 30 reaches the hollow portion 16. Attached to. Moreover, in this embodiment, although the above-mentioned fixing pin 31 (35) becomes long by the height of the rib 17, any can be used. Since the operational effect of the fixing pin 31 (35) of the fixing member 30 is the same as that of the above-described embodiment, the description thereof is omitted. Moreover, since the effect shown in the said FIG. 6 is also the same, the description is abbreviate | omitted. Furthermore, in this embodiment, by providing the rib 17, the space between the lower floor board 15 and the floor finishing material 23 can be widened, and the air escape path in this space can be increased.

[Example of sound insulation floor construction]
FIGS. 8A, 8B, and 8C are diagrams showing the laying process of the sound insulation floor structure 2 according to the second embodiment shown in FIG. 5, and FIG. 9 is the sound insulation floor structure shown in FIG. FIG. In this example, an example in which the legs 20 and the cushioning material 21 are staggered in a plan view and attached with the fixing pins 35 will be described. The same applies to the case where the leg member 20 and the buffer member 21 are arranged in parallel in a plan view.

  As shown in the perspective view of FIG. 8A, an extruded cement board that is the lower floor board 15 in the sound insulating floor structure 2 is attached on the beam 50. The lower floor board 15 made of an extruded cement board is fixed to the beam 50 by an attaching means such as a Z clip on the back side (downstairs side) not shown. On the upper surface of the lower floor plate 15, mounting holes 13 into which the fixing pins 35 are inserted are provided at regular intervals. As described above, the mounting hole 13 is formed in such a size that the fixing pin 35 can move up and down.

  As shown in the perspective view of FIG. 8 (B), a leg material 20 divided into pieces is placed in the mounting hole 13 portion of the lower floor board 15, and a buffer of the same size as the leg material 20 is placed thereon. The material 21 is provided overlapping. A threading material 22 is provided on the cushioning material 21.

  As the leg material 20, materials such as wood, plywood, laminated material, plastics (including waste plastic), prada, slate board and the like can be used. The size of the leg member 20 can be 5 to 50 mm in thickness, 30 to 100 mm in width, and 30 to 150 mm in length, but the length is appropriately adjusted according to the size of the floor surface to be formed. Can be used.

  Examples of the buffer material 21 include natural rubber, synthetic natural rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, chlorosulfonated polyethylene rubber, acrylic rubber, urethane rubber, silicone rubber, and fluorine rubber. Polysulfide rubber and all these foams can be used. The size of the buffer material 21 can be, for example, a thickness of 5 to 50 mm, a width of 30 to 100 mm, and a length of 30 to 150 mm. The length is appropriately determined according to the size of the lower floor board 15 to be configured. Combined ones can be used.

  As the threading material 22, materials such as wood, plywood, laminated material, plastics (including waste plastic), prada, slate board, etc. can be used. As the size of the threading member 22, for example, a material having a thickness of 5 to 25 mm, a width of 30 to 100 mm, and a length of 100 to 3000 mm can be used. The length is appropriately determined according to the size of the lower floor plate 15 to be configured. Combined ones can be used.

  In addition, what is necessary is just to use the leg material 20, the buffer material 21, and the threading material 22 combining these according to the load capacity which the floor finishing material 23 requires.

  Then, these are attached to the lower floor board 15 by the fixing pin 31 (35) of the fixing member 30 which has a length extending from the upper part of the threading material 22 through the buffer material 21 and the leg material 20 to the hollow portion 16 of the lower floor board 15. It is attached.

  As shown in the perspective view of FIG. 8C, a floor finishing material 23 is provided on the threading material 22. When the floor finish material 23 is constituted by the floor base material 24 and the flooring material 25, the floor base material 24 is fixed to the threading material 22 with nails or screws, and the flooring material 25 is placed on the floor base material 24. Attached with screws, adhesives, etc. As the floor base material 24, a plywood, a particle board or the like is used, and as the flooring material 25, a wood type or resin type member is used. These are not special ones, and those conventionally used can be used.

  As shown in the perspective view of FIG. 9, the sound insulation floor structure 2 configured as described above is provided with a leg material 20, a cushioning material 21, and a threading material 22 on a lower floor plate 15, and a floor finishing material 23 on the upper part thereof. Is provided, and the sound insulation floor structure 2 is supported in which the floor finishing material 23 is supported in a state of floating from the lower floor board 15. Therefore, a space serving as an air escape path can be created between the leg members 20 and the buffer material 21.

  On the other hand, as shown in the perspective view of FIG. 10, it is good also as the sound insulation floor structure 4 of the structure without the leg material 20 in the said sound insulation floor structure 2. FIG. Even when there is no leg member 20, since the threading material 22 is supported by the cushioning material 21 in a state where it floats from the lower floor plate 15, the floor insulation material 23 is supported in a state where it floats from the lower floor plate 15. Become. Therefore, even in the sound insulating floor structure 4, a space serving as an air escape path can be created between the leg members 20 and the buffer material 21.

[Arrangement example of cushioning material]
FIGS. 11A and 11B are diagrams showing an arrangement example of the leg material 20 and the buffer material 21 and an air escape path in the sound insulating floor structure 3. FIG. 11A is an example in which the leg members 20 and the buffer material 21 are arranged in a staggered manner in a plan view, and FIG. 11B is an example in which the leg members 20 and the buffer material 21 are arranged in parallel in a plan view. is there. In these drawings, the rib 17 in the third embodiment of FIG. 7 and the cushioning material 21 (shown in black) provided on the upper portion thereof are illustrated. By arranging the legs 20 and the cushioning material 21 in this way, it is possible to create an escape path for the air 40 as indicated by arrows.

  Therefore, since the fixing pins 31 and 35 of the fixing member 30 are movable up and down as described above, when the impact sound is applied to the floor finish 23, the fixing pins 31 and 35 are stretched. The entire floor finishing material 23 can sink without causing the air layer in the space between the floor finishing material 23 and the lower floor board 15 to escape radially to the periphery. Thereby, it is possible to enhance the effect of attenuating the impact sound.

[Sound insulation performance test]
FIG. 12 is a perspective view of a configuration in which a sound insulation performance test of the sound insulation floor structure 2 was performed. The configuration of the test for performing the sound insulation performance test is as follows.

  As the extruded cement board which is the lower floor board 15, five sheets of thickness 100mm x width 500mm x length 2000mm are attached on the steel beam 50, and on it, the cushioning material 21 is 10mm thick x 50mm wide x 100mm long. The ethylene propylene rubber foam was staggered as shown in FIG. 11A, and a plywood having a thickness of 15 mm, a width of 60 mm, and a length of 2000 mm was attached as the threading member 22. The buffer material 21 is arranged in a staggered manner so that the distance between the longitudinal ends of the lower floor board 15 is 187.5 mm or 35 mm and the longitudinal distance is 205 mm. It attached to the position used as the distance of 91 mm from the width direction both ends.

  In addition, the cushioning material 21 and the threading material 22 are attached by an example in which the fixing pin 31 (having a drill portion 33 at the tip) attached with a diameter of 3.8 mm × length 60 mm and a screw with a diameter of 3.8 mm × length 60 mm. There are three types: an example of attachment and no fixation. Then, a particle board was provided as a floor base material 24 having a thickness of 15 mm thereon, and a flooring material 25 having a thickness of 12 mm and a width of 303 mm was further mounted thereon.

  The test body configured in this manner is provided in the upper part of the sealed measurement chamber 60, and the sound insulation performance is measured by dropping a 7.3kg tire 62 from a height of 85cm above the flooring material 25 according to JIS A1418. The floor impact sound was measured with a sound receiving microphone 61 provided in the chamber 60.

  FIG. 13 is a graph showing the results of the sound insulation performance test. The horizontal axis shown in the figure is the octave band center frequency (Hz), and the vertical axis is the floor impact sound level. “◯” indicates the result of the conventional fixing method, “Δ” indicates the result of the fixing method of the present invention, and “□” indicates the result of the case without fixing. As shown in the figure, with the fixing method according to the present invention, it is possible to obtain a sound insulation performance almost equivalent to that without fixing, and it is possible to reduce the weight impact sound of 500 Hz or less, particularly around 125 Hz, and to the conventional fixing method. The sound insulation performance is improved compared to this.

[Summary]
As described above, according to the sound insulating floor structures 1, 2, and 3, the floor finish material can be moved up and down by attaching the fixing member 30 that fixes the cushioning material 21 to the lower floor boards 10 and 15. Thus, it is possible to prevent the impact sound 23 from propagating directly to the lower floor boards 10 and 15 through the fixing member 30. Therefore, it is possible to suppress the propagation of heavy impact sound or the like to the lower floor boards 10 and 15 and greatly improve the impact sound blocking performance.

  In addition, since the fixing member 30 can be moved up and down, the entire floor finishing material 23 can sink, and is located in the space between the floor finishing material 23 and the lower floor boards 10 and 15. Sound insulation performance can be further improved by letting the air layer escape radially to the surroundings.

  In the above-described embodiment, the solid lower floor board 10 and the lower floor board 15 of the extrusion-molded cement board have been described as examples. However, the lower floor boards 10 and 15 are not limited to these floor materials, and are PC boards. , Lightweight aerated concrete, aerated concrete, laminated wood, RC floor, wooden floor, etc. Moreover, the structure in embodiment mentioned above can also be combined and it is not limited to the structure of each embodiment.

  Furthermore, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

1 Sound insulation floor structure
2 Sound insulation floor structure
3 Sound insulation floor structure
DESCRIPTION OF SYMBOLS 4 Sound insulation floor structure 10 Lower floor board 11 Anchor member 12 Wall part 13 Mounting hole 14 Hollow part 15 Lower floor board 16 Hollow part 17 Rib 20 Leg material 21 Buffer material 22 Passing material 23 Floor finishing material 24 Floor base material 25 Flooring material 30 Fixing member 31 Fixed Pin 32 Head 33 Drill Part 35 Fixed Pin 36 Head 37 Access / Exit 40 Air 50 Beam 60 Measurement Chamber 61 Sound Receiving Microphone

Claims (8)

A floor structure constructed by laying floor finishing material on the upper part of the lower floor board,
On the upper surface of the lower floor board, a cushioning material and a threading material are provided so as to overlap each other,
The threading material and the buffer material are attached to the lower floor board by a fixing member having a length that penetrates the threading material and the cushioning material from the upper part of the threading material and reaches the hollow portion of the lower floor board, and the fixing The member is held in a vertically movable state with respect to the lower floor board,
A sound insulating floor structure, wherein a floor finishing material is laid on an upper portion of the threading material. A leg having a predetermined height between the lower floor board and the cushioning material;
The sound insulation floor structure according to claim 1, wherein the leg members and the cushioning material are arranged at a plurality of locations at predetermined intervals on the upper surface of the lower floor board. A leg having a predetermined height between the lower floor board and the cushioning material;
The sound-insulating floor structure according to claim 1, wherein the leg material and the cushioning material are arranged in a plurality of places at predetermined intervals on the upper surface of the lower floor board in a staggered manner. A floor structure constructed by laying floor finishing material on the upper part of the lower floor board,
The lower floor board has a plurality of ribs arranged in parallel on the upper surface,
On the upper surface of the rib, the cushioning material and the threading material are provided to overlap vertically,
The cushioning material and the threading material are fixed to the lower floor board by a fixing member having a length that penetrates the threading material, the cushioning material, and the rib from the upper part of the threading material and reaches the hollow portion of the lower floor board. The fixing member is held on the lower floor plate so as to be movable up and down,
A sound insulating floor structure, wherein a floor finishing material is laid on an upper portion of the threading material.   The sound-insulating floor structure according to claim 4, wherein the cushioning material is arranged at a plurality of locations at predetermined intervals on parallel ribs provided on the upper surface of the lower floor board.   The sound-insulating floor structure according to claim 4, wherein the cushioning material is arranged in a plurality of locations in a staggered manner at predetermined intervals on parallel ribs provided on the upper surface of the lower floor board.   The sound insulation floor structure according to any one of claims 1 to 6, wherein the fixing member has a fixing pin having a drill portion at a tip thereof.   The sound-insulating floor structure according to any one of claims 1 to 6, wherein the fixing member has a fixing pin having an entrance / exit part that enters and exits in a radial direction at a distal end.

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