JP2011256531A - Double floor supporting leg, double floor structure using the same, and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double floor structure in a wooden house, which insulates sound generated on an upper story to a sufficient extent with reasonable costs.SOLUTION: A double floor structure 1 comprises a double floor supporting leg 3 that is arranged on a floor building frame 2 on an upper story, a rectangular wood panel 4 that is spread over the upper surfaces of the double floor supporting legs, and a sub-floor material 5 and a floor finishing material 6 that are laid on the wood panel. The double floor supporting leg 3 comprises a rectangular solid supporting block that is a laminate of three wood square plate pieces and projecting impact absorbing materials that are arranged on an exposed surface of a bottom layer of the supporting block at four corners respectively. The impact absorbing materials are arranged on the floor building frame 2 on the upper story so as to be in contact with an upper surface of a hard plaster board 9 constituting the floor building frame 2. The supporting block 33 has a flat shape with a width and a depth of 300 mm and an overall height of 72 mm, with a ratio (aspect ratio) of the height in the laminating direction to the width along an in-plane direction of the plate piece of 72/300=0.24.

Description

  The present invention relates to a double-floor support leg suitable for a detached house, particularly a wooden detached house, a double-floor structure using the same, and a construction method thereof.

  In apartment houses represented by apartments, flooring with better hygiene than carpeting has been common for a long time, but in flooring, it is important to take sound insulation measures on the lower floor against floor impact noise generated on the upper floor. Therefore, in the building guidelines, sound insulation performance of L-45 for light impact sources and L-50 for heavy impact sources is recommended ("Sound insulation performance standards and design guidelines for buildings", Architectural Institute of Japan).

  Recently, in conjunction with the need for comfortable living, higher sound insulation performance has been demanded, and a double floor has been constructed on a reinforced concrete slab (hereinafter referred to as RC slab) that exceeds 200 mm in thickness. The specifications to be made are becoming standard.

  In constructing such a double floor on the RC slab, support legs are arranged on the RC slab at a predetermined pitch in two planes, and a panel material such as particle board is placed on the support legs. In general, a floor base and a flooring material are sequentially laid on the material, and a sound absorbing material is disposed in the gap between the RC slab and the panel material.

  On the other hand, in the case of detached houses, especially wooden detached houses, the density of wooden materials is much lower than that of concrete, so it is structurally difficult to improve the sound insulation performance, and the impact sound generated on the upper floors coexists. Since it is by the family, the need for sound insulation from the upper floors was originally low, and there have been few examples of applying a sound insulation structure using a double floor to a wooden detached house.

JP 2009-270372 A JP 2007-27784 A JP 2005-325598 A

  Recently, however, there is an increasing trend in expressing beams as structural beauty and constructing them as expressive beams. In expressive beams, the upper floor is exposed on the lower floor because no ceiling is provided. Thus, the impact sound on the upper floor is directly transmitted to the lower floor, resulting in a problem that the comfort level on the lower floor is lowered.

  On the other hand, the conventional double floor and supporting legs used for it are suitable for RC slabs of apartment buildings, and even if they are directly converted into wooden houses, can they achieve the required sound insulation effect at reasonable cost? Not necessarily certain.

  For example, the support legs developed for apartment buildings have a restriction that a special panel material is required and the height needs to be adjusted using a dedicated tool for the RC slab adjustment. If the floor work is intensively performed for a large number of housing units of several tens to several hundreds, even if it can be a reasonable cost as a total, in a detached house that must be constructed for each house However, there is concern that floor construction will be a major burden on the overall construction cost.

  In addition, as mentioned above, most of the support legs for apartment buildings are adjustable in height on the premise that the RC slabs will be adjusted to the level. In recent wooden houses built with beams, such unevenness adjustment is often unnecessary, and it is assumed that the height adjustment function of the support legs becomes over-spec.

  In addition, the support legs for apartment buildings require special panel materials, so the arrangement pitch and placement location are limited, and this restriction restricts the degree of freedom in designing the floor plan for custom-built houses. There are also concerns that lead to inability to respond.

  For these various reasons, there has been an urgent need to research and develop a double-floor structure suitable for wooden detached houses and supporting legs used for it.

  The present invention has been made in consideration of the above-described circumstances, and a double-floor support leg capable of insulating the sound generated on the upper floor in a wooden house at a reasonable cost and to a sufficient extent. An object is to provide a double floor structure used and a construction method thereof.

  In order to achieve the above object, a double floor structure according to the present invention comprises a rectangular parallelepiped support block formed by laminating a plurality of rectangular plate pieces made of a wood-based material, as described in claim 1, and the support block A plurality of shock absorbers projecting from the exposed surface corners of the rectangular plate pieces constituting the lowermost layer are arranged on the upper floor frame so that the shock absorbers abut on the upper surface of the upper floor frame Double floor support legs, rectangular wooden panels spanned on top of the double floor support legs and nailed or screwed, and floor base materials and floor finishing materials laid on the rectangular wooden panels The support block is formed such that the ratio of the height in the stacking direction to the width along the in-plane direction of the rectangular plate piece is less than 1.

  In addition, the double floor structure according to the present invention is a structure in which the upper-floor frame is spanned on an express beam.

Further, according to the method for constructing a double floor structure according to the present invention, a rectangular parallelepiped support block is formed by laminating a plurality of rectangular plate pieces made of a wood material, and the lowermost layer of the support block is provided. A shock absorbing material is protruded at the corner of the exposed surface of the rectangular plate piece forming the support block, and the support block is formed such that the ratio of the height in the stacking direction to the width along the in-plane direction of the rectangular plate piece is less than 1. A plurality of support legs for double floors are arranged along the two horizontal directions on the upper floor frame so that the shock absorber contacts the upper surface of the upper floor frame,
A sound-absorbing material is laid between two double-floor support legs spaced apart from each other among the double-floor support legs,
A rectangular wooden panel is bridged on the upper surface of the double floor support leg, and the rectangular wooden panel is nailed or screwed to the double floor support leg,
A floor base material and a floor finishing material are sequentially laid on the rectangular wooden panel.

  Further, as described in claim 4, the double-floor support leg according to the present invention forms a rectangular parallelepiped support block by laminating a plurality of rectangular plate pieces made of a wood-based material, and the lowest layer of the support block A shock absorbing material is protruded at the corner of the exposed surface of the rectangular plate piece constituting the support block, and the ratio of the height in the stacking direction to the width along the in-plane direction of the rectangular plate piece is less than 1. Is formed.

  In order to construct a double floor structure using the double floor support legs according to the present invention, first, a plurality of double floor support legs are arranged on the upper floor frame along two horizontal directions.

  The upper floor structure can be constructed, for example, over a display beam.

  Double floor support legs form a rectangular parallelepiped support block by stacking a plurality of rectangular plate pieces made of wood-based materials, and absorb the shock at the corners of the exposed surface of the rectangular plate piece that forms the bottom layer of the support block When the material is protruded and arranged on the upper floor frame, the shock absorbing material is arranged so as to contact the upper surface of the upper floor frame.

  The support block can be configured by, for example, processing a structural plywood having a thickness of 24 mm into a 300 mm square to form a rectangular plate piece, and stacking the three layers. The impact absorbing material may be formed by molding natural rubber having a hardness of 60 ° to a thickness of about 5 mm, for example.

  The support legs for double floors are typically arranged at lattice points in two planes orthogonal to each other.

  Here, the support legs for the double floor are flat in the installation state so that the ratio of the height in the stacking direction to the width along the in-plane direction of the rectangular plate piece is less than 1, in other words. Therefore, the installation tolerance along the horizontal direction increases.

  That is, compared with the support legs for apartment houses, the installation accuracy is greatly relaxed, and the efficiency of installation work on the upper floor frame is significantly improved.

  In addition, when pre-cutting the frame members such as pillars and beams at the factory and assembling locally, the horizontal accuracy of the upper floor frame can be kept to about 1 to 3 mm. It is not necessary to adjust the height during installation work, and it is not necessary to provide a height adjustment function for each double floor support leg. If necessary, the height may be adjusted by inserting a spacer as appropriate.

  Next, among the double floor support legs, a sound absorbing material is laid between two double floor support legs spaced apart from each other.

  Here, in the case of support legs for apartment buildings that need to be placed in front of the back surface of the panel material, sound absorbing material must be laid to avoid the place where the support legs are to be placed. In the invention, it is possible to easily lay the sound absorbing material from above while avoiding the double-floor support legs already arranged.

  In addition, even if it is not necessary to precede the panel material, most of the support legs for the housing complex are vertically long, so the self-supporting state is unstable and the installation accuracy is severe, It is necessary to pay sufficient attention to the laying of the sound-absorbing material so that the support legs do not fall down or shift. The arrangement work of the sound absorbing material can be advanced without spending.

  Next, a rectangular wood panel is bridged on the upper surface of the double floor support leg. For example, a structural plywood can be used for the rectangular wood panel.

  The rectangular wood panel is then nailed or screwed to the double floor support legs.

  Here, the rectangular wooden panels are installed over the entire floor construction range so that no gaps are formed between adjacent rectangular wooden panels, but in the edge region and corner region of the floor construction range, In order to prevent acoustic coupling from occurring due to the air layer spreading in between, a gap is provided between the wall material and an air passage is created.

  Next, a floor base material and a floor finish material are sequentially laid on the rectangular wooden panel.

  The floor base material and floor finishing material laid in this way do not have the support pitch of the double floor support legs, but the horizontal width of the support block or the width of the support block from the pitch of the double floor support legs. The length obtained by subtracting twice the dimension is the support interval.

  Therefore, compared with the support legs for apartment buildings, the support intervals of the rectangular wooden panel, the floor base material, and the floor finishing material at the same arrangement pitch are shortened, thus reducing the flexure of the floor and improving the feeling of walking.

  By the way, the support legs for apartment buildings are composed of a base made of anti-vibration rubber, a support leg main body made up of bolts and plastic bundles standing on the base, and a panel receiver attached to the top of the support leg main body. In general, the panel receiver is supported by the supporting leg body such as a bolt only in the vicinity of the center thereof. It is necessary to sufficiently increase the rigidity, and high cost is inevitable.

The whole perspective view of the double floor structure concerning this embodiment. FIG. 2 is a detailed vertical sectional view taken along the line AA in FIG. 1. It is a figure of the support leg for double floors concerning this embodiment, (a) is a side view, (b) is the arrow line view seen from the BB line direction. The top view which showed the arrangement | positioning condition of the support leg 3 for double floors. The top view which showed a mode that the sound-absorbing material 51 was spread | laid between the support legs 3 for double floors. The graph which showed the result of the verification test of a double floor structure (comparative test body A-1). The graph (test body A) which showed the result of the verification test of the double floor structure. It is the figure which showed the test body which investigates the difference in the arrangement | positioning form of an impact-absorbing material, (a) And (b) is the top view and side view of this test body B, (c) is the comparison test body B-1. Side view, (d) is a side view of comparative specimen B-2. The graph which showed the result of the verification test regarding the arrangement | positioning form of a shock absorber, and showed the light floor impact sound level. The graph which showed the acceleration which was a result of the verification test regarding the arrangement form of a shock absorber.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a double floor support leg according to the present invention, a double floor structure using the same, and a construction method thereof will be described below with reference to the accompanying drawings.

  FIG. 1 is an overall perspective view showing a double floor structure according to the present embodiment, and FIG. 2 is a vertical detailed sectional view taken along the line AA in FIG. As can be seen from these drawings, the double floor structure 1 according to the present embodiment spans the double floor support leg 3 disposed on the upper floor frame 2 and the upper surface of the double floor support leg. The rectangular wooden panel 4 is composed of a floor base material 5 and a floor finishing material 6 laid on the rectangular wooden panel.

  The upper floor frame 2 is composed of a rigid floor panel 8 laid over a beam 7 and a hard gypsum board 9 laid thereon.

  The rigid floor panel 8 is composed of a structural plywood having a thickness of 24 mm using larch, and the beam is arranged so that its longitudinal direction is perpendicular to the beam 7 and staggered as can be seen in FIG. It is stretched over. Further, as can be seen in FIG. 2, a panel receiving member 10 is bridged in a direction orthogonal to the beam 7 at a position where the longitudinal side edges of the rigid floor panel 8 are adjacent to each other, and the longitudinal direction of the rigid floor panel 8 is on the upper surface. It is screwed on the side edge.

  The hard gypsum board 9 is formed by stacking two sheets having a thickness of 12.5 mm.

  Here, the ceiling is not stretched below the beam 7 as shown in FIG. 2, and the beam is a beam when viewed from the lower floor 11.

  As shown in FIG. 3, the double-floor support leg 3 is formed by stacking three square plate pieces 31 made of a wood-based material to form a rectangular parallelepiped support block 33, and a rectangular plate piece constituting the lowermost layer of the support block The shock absorbers 32 are provided so as to protrude from four corners of the exposed surface 31 of the 31, and the shock absorbers are in contact with the upper surface of the hard gypsum board 9 constituting the upper floor casing 2. It is arranged in the floor frame 2.

  The support block 33 is formed by processing the same structural plywood as the rigid floor panel 8 into a 300 mm square and laminating using an adhesive, and has a flat shape with a width and depth of 300 mm and an overall height of 72 mm. The ratio of the height in the stacking direction to the width along the in-plane direction of 31 (aspect ratio) is 72/300 = 0.24.

  The shock absorbing member 32 is formed of natural rubber having a hardness of 60 ° to a thickness of 5 mm.

  The rectangular wood panel 4 is composed of a structural plywood having a thickness of 24 mm using cedar, and is spanned over the double floor support leg 3 and screwed to the double floor support leg. .

  The floor base material 5 is formed by stacking two hard plaster boards having a thickness of 12.5 mm and stacking a plywood having a thickness of 12 mm thereon.

  The floor finishing material 6 may be appropriately selected according to the preference of the owner, and for example, a flooring material having a thickness of 12 mm can be used.

  In the hollow space sandwiched between the upper floor frame 2 and the rectangular wooden panel 4, an electric communication cable, a unit cable mold, a facility pipe, and the like can be arranged as necessary.

  In order to construct the double floor structure 1 using the support legs 3 for double floor according to the present embodiment, first, a rigid floor panel 8 made of a structural plywood having a thickness of 24 mm is used. It is crossed over the beam so as to be orthogonal to each other and arranged in a staggered manner.

  Next, as shown in FIG. 2, the wall board support 12 is attached around the floor construction range, and then the lower edge of the wall board 13 is fixed to the wall board support 12.

  Next, the first hard gypsum board 9 is laid on the hard floor panel 8 and fastened with staples, and then the second hard gypsum board 9 is laid thereon and similarly fastened with staples. .

  In this way, when the upper floor case 2 composed of the hard floor panel 8 and the two layers of the hard gypsum board 9 is constructed, next, the double floor support legs 3 are horizontally attached to the upper floor case 2. A plurality are arranged along the direction.

  FIG. 4 is a plan view showing the arrangement of the double floor support legs 3. As shown in the figure, a square area surrounded by a wall board 13 and having four columns 41 as apexes is set as a floor construction range, and a total of 25 double floor support legs 3 are arranged in the floor construction range.

  Among these, nine double floor support legs 3 arranged in the center region of the floor construction range are arranged at a pitch of 910 mm along two horizontal directions orthogonal to each other, and are arranged in the edge region and the corner region. The 16 double-floor support legs 3 that are positioned are arranged at positions separated from the double-floor support legs 3 in the central region by 377.5 mm to the outer peripheral side (677.5 mm in the center distance). .

  Note that the double-floor support legs 3 are only placed on the upper-floor frame 2 without being fastened with nails or screws so that sound transmission to the lower floor is interrupted as much as possible.

  Next, as shown in FIG. 4, rectangular wooden panels 4 are laid in a zigzag pattern on the upper surface of the double-floor support legs 3, but acoustic coupling occurs due to the air layer extending between the upper-floor frame 2. The position is adjusted so that a gap is provided between the wall board 13 and the air passage.

  Next, when the double floor support leg 3 comes to the corner of the rectangular wooden panel 4 at the four corners and the longitudinal side edge, the screws are fastened to the double floor support leg 3 at two further positions.

  Next, a floor base material 5 and a floor finishing material 6 are sequentially laid on the rectangular wooden panel 4. In laying the floor base material 5 and the floor finishing material 6, the position is adjusted in the same manner as the rectangular wood panel 4 so that a gap is formed between the floor board material 5 and the floor finish material 6.

  As described above, according to the double floor support leg 3 according to the present embodiment, the double floor structure 1 using the same, and the construction method thereof, the support block 33 of the double floor support leg 3 is a rectangular plate. Since the ratio of the height in the stacking direction (aspect ratio) to the width along the in-plane direction of the piece 31 is less than 1, in other words, the support block 33 is formed so as to be flat in the installed state. The horizontal installation tolerance for the floor frame 2 can be increased.

  That is, since the support block 33 is configured to be flat, an area for receiving the rectangular wood panel 4 is increased, and even if the installation position of the support legs 3 for the double floor is deviated by about 10 mm from the design value, for example, There is no problem in that respect.

  Therefore, compared with the support legs for apartment houses, the installation accuracy is greatly relaxed, and the installation work efficiency on the upper floor frame 2 is significantly improved. In addition, since the support block 33 of the double-floor support leg 3 is flat, the stability of the installation state is high, and this installation stability also contributes to the improvement of the installation work efficiency.

  Further, according to the double-floor support leg 3 according to the present embodiment, the double-floor structure 1 using the same, and the construction method thereof, the support block 33 of the double-floor support leg 3 is made of a wood-based material. Therefore, the rectangular wooden panel 4 can be screwed, and there is no need to use a dedicated tool like a support leg for an apartment house. In addition, by allowing screws to be attached to the support legs 3 for the double floor, the rectangular wooden panel 4 can be arbitrarily selected from various plywoods, and is originally manufactured in a rectangular shape using a wooden material. Any panel can be used.

  Moreover, according to the double-floor support leg 3 according to the present embodiment, the double-floor structure 1 using the same, and the construction method thereof, the support block 33 of the double-floor support leg 3 is flattened in the installed state. Thus, the support interval between the rectangular wooden panel 4 or the floor base material 5 and the floor finishing material 6 by the double floor support legs is 910 mm instead of the arrangement pitch of the double floor support legs 3, for example, 910 mm. 610 mm obtained by subtracting 300 mm from

  Therefore, the support interval of the upper panel with respect to the arrangement pitch of the support legs is significantly smaller than that of the support legs for the apartment house, thus suppressing the flexure of the floor and improving the feeling of walking.

  In addition, since the horizontal accuracy of the upper floor frame 2 is about 1 to 3 mm because of the pre-cutting of the frame members such as columns and beams at the factory and assembling locally, basically installation work on the upper floor frame 2 Sometimes it is not necessary to adjust the height of the double floor support legs 3.

  Therefore, it is not necessary to provide a height adjusting function like the support legs for apartment houses, and the double floor support legs 3 can be manufactured at low cost.

  In addition, according to the double-floor support leg 3 according to the present embodiment, the double-floor structure 1 using the same, and the construction method thereof, the double-floor support leg 3 is disposed not only at the lattice point but also at an arbitrary place. In addition, the restrictions on the installation position can be greatly relaxed in relation to the rectangular wood panel 4, so it is possible to handle various floor plans even in custom-built houses, which is also suitable for client requests. Can respond.

  In addition, according to the double-floor support leg 3 according to the present embodiment, the impact absorbing material 32 is protruded at four locations on the lower surface corner portion of the support block 33. Can be greatly reduced.

  Although not particularly mentioned in the present embodiment, two double floors separated from each other after the double floor support legs 3 are arranged and before the rectangular wooden panel 4 is bridged over the double floor support legs. It is desirable to lay a sound absorbing material between the supporting legs 3 and 3 for improving the sound insulation characteristics of the double floor structure.

  FIG. 5 is a plan view showing a state in which the glass wool 51 as the sound absorbing material is disposed between the support legs 3 for the double floor.

  In arranging such glass wool 51, if it is a support leg for an apartment house that needs to be preceded by the panel material, the panel material becomes an obstacle and the workability is bad. The glass wool 51 can be easily laid from above while avoiding the double-floor support legs 3 already arranged.

  On the other hand, even when compared to support legs for apartment buildings that do not need to be preceded by panel materials, most of the support legs for apartment houses are vertically long, so the self-supporting state is unstable and installation accuracy is severe. In addition, it is necessary to pay sufficient attention to the laying of the sound-absorbing material so that the support legs do not fall down or shift, but in this modification, the flat floor and the installation accuracy are relaxed, The arrangement work of the sound absorbing material and the like can be advanced without paying much attention to the arrangement state of the supporting legs 3.

  Further, in this embodiment, the application example in the case where the beam 7 is the specified specification has been described, but it is of course possible to construct the double floor structure according to the present invention on the normal beam 7 provided with a ceiling. It is.

  Further, in the present embodiment, the support block 33 is configured by stacking three layers of the plate pieces 31, but the number of stacks is arbitrary, and in some cases, two layers may be used, and conversely, four layers and five layers are stacked. It doesn't matter.

  Moreover, in this embodiment, although the planar shape of the support leg 3 for double floors was made into the square, it may replace with this and may comprise a rectangle.

  Further, in this embodiment, the upper floor casing 2 and the floor base material 5 include two stacked hard plaster boards having a thickness of 12.5 mm, but these numbers are arbitrary. In the first place, whether or not the hard gypsum board is used as a component of the upper floor frame or the floor base material is also arbitrary.

  In this embodiment, the aspect ratio of the support block is set to 0.24. However, the support block of the double floor support leg according to the present invention is not limited to such a form, and the aspect ratio is By making it a range not exceeding 1, that is, a flat shape rather than a vertically long shape, it is possible to similarly enjoy the operational effects of this embodiment such as improved installation stability and shortened support interval of the rectangular wooden panel.

(Demonstration test 1)
In the double floor structure 1 according to the embodiment described with reference to FIG. 1 to FIG. 3, floor impact is defined as a specimen A in which glass wool 51 as a sound absorbing material is laid between the support legs 3 and 3 for the double floor. A sound performance test was performed. In addition, a rigid floor panel 8 having a thickness of 24 mm is laid over the beam 7, a hard plaster board having a thickness of 12.5 mm is laid thereon, and then a flooring material having a thickness of 12 mm is laid. It was set as the body A-1.

  FIG. 6 is a graph showing the results of Comparative Specimen A-1. As can be seen from FIG. 6, the floor impact sound for the heavy impact sound is L-80, and the light impact sound is L-90. It was.

  On the other hand, as shown in FIG. 7, in the test body A, the weight impact sound is L-70 and the light impact sound is also L-70, the heavy floor impact sound performance is 10 dB, the light floor impact sound performance is 20 dB, It turned out that each can be improved.

(Verification test 2)
In order to confirm the effect of the shock absorber 32, as shown in FIGS. 8 (a) and 8 (b), the four double-floor support legs 3 are arranged so that their centers coincide with the corners of a 910 mm square. In the same manner as in the present embodiment, a 910 mm square simulated flooring 81 in which the rectangular wooden panel 4, the floor base material 5 and the floor finishing material 6 are laminated in this order, has four double floors at the corners. The test body B was manufactured by placing it on the support leg for the double floor so as to coincide with each center of the support leg 3 for use.

  On the other hand, as a comparative test body, a comparative test body B-1 that does not project the shock absorbing material 32 (FIG. 3C), and a sheet material made of the same rubber as the shock absorbing material 82 are used as the entire lower surface of the support block 33. Comparative test body B-2 (Fig. 4 (d)) provided for each was manufactured.

  In the test, by installing a tapping machine in the center of the simulated flooring 81, the sound pressure level is measured using the lower floor as a sound receiving room, and lightweight floor impact sound data is acquired, and the acceleration below the simulated flooring 81 is accelerated. A gauge was installed and the acceleration was compared.

  The light floor impact sound data is shown in FIG. 9, and the result of the acceleration test is shown in FIG.

  Among these results, from FIG. 9, although a large difference is not seen between the comparative test body B-1 that does not project the shock absorbing material 32 and the comparative test body B-2 that provides the rubber material on the entire surface, It can be seen that the specimen B has a lighter floor impact sound level lower than that of the comparative specimen B-1 and the comparative specimen B-2.

  Moreover, it can be seen from FIG. 10 that the acceleration on the floor where the test specimen is installed decreases in the order of the comparative specimen B-1, the comparative specimen B-2, and the specimen B.

  As a result, although the test floor had already been subjected to sound insulation measures, there was no significant difference, but the effect of the present embodiment in which the shock absorbers 32 are provided at the four corners could be demonstrated.

DESCRIPTION OF SYMBOLS 1 Double floor structure 2 Upper floor frame 3 Double floor support leg 4 Rectangular wooden panel 5 Floor base material 6 Floor finishing material 7 Beam 8 Rigid floor panel (upper floor frame)
9 Two layers of hard plaster board (upper floor frame)
31 Plate pieces (rectangular plate pieces)
32 Shock absorber 33 Support block 51 Glass wool (sound absorbing material)

Claims (4)

A plurality of rectangular plate pieces made of a wood-based material are stacked to form a rectangular parallelepiped support block, and an impact absorbing material is projected from the corner of the exposed surface of the rectangular plate piece constituting the lowermost layer of the support block. A plurality of double-floor support legs arranged on the upper-floor frame so that the absorbent material abuts on the upper surface of the upper-floor frame, and a nail or screw spanned over the upper surface of the double-floor support leg A rectangular wood panel that is fastened, and a floor base material and a floor finish material laid on the rectangular wood panel, and the height of the support block in the stacking direction relative to the width along the in-plane direction of the rectangular plate piece A double floor structure, wherein the ratio is less than 1. The double-floor structure according to claim 1, wherein the upper-floor frame is spanned on an express beam. A plurality of rectangular plate pieces made of a wood-based material are laminated to form a rectangular parallelepiped support block, and a shock absorber is projected from the corner of the exposed surface of the rectangular plate piece constituting the lowermost layer of the support block. A double floor support leg formed such that the ratio of the height in the stacking direction to the width along the in-plane direction of the rectangular plate piece is less than 1, the shock absorbing material hits the upper surface of the upper floor frame. Arrange a plurality along the two horizontal directions on the upper floor frame so as to touch,
A sound-absorbing material is laid between two double-floor support legs spaced apart from each other among the double-floor support legs,
A rectangular wooden panel is bridged on the upper surface of the double floor support leg, and the rectangular wooden panel is nailed or screwed to the double floor support leg,
A method for constructing a double floor structure, wherein a floor base material and a floor finishing material are sequentially laid on the rectangular wooden panel. A plurality of rectangular plate pieces made of a wood-based material are laminated to form a rectangular parallelepiped support block, and a shock absorber is projected from the corner of the exposed surface of the rectangular plate piece constituting the lowermost layer of the support block, The double floor support leg, wherein the support block is formed such that a ratio of a height in a stacking direction to a width along an in-plane direction of the rectangular plate piece is less than 1.