JP4904085B2 - Floor structure - Google Patents

Description

  The present invention relates to a floor structure.

  Conventionally, various floor structures of buildings are known (for example, see Patent Document 1).

In the floor structure disclosed in Patent Document 1, a floor base panel is supported at a predetermined height by a support leg on a foundation floor such as a concrete slab, and a hard board or a high-density fiber board is supported on the floor base panel. A flooring material such as a flooring material is further laid on the floor material.
Japanese Patent No. 3588097

  In the floor structure disclosed in Patent Document 1, a hard board or a high-density fiber board is used as a scraping material provided between the floor base panel and the floor finishing material. A hard board or a high-density fiberboard is a mass of wood fibers that has been hot-pressed and hardened to a high density, and the amount of voids contained therein is considerably reduced. For this reason, it is difficult to absorb the screw or nail to be driven into the internal space of the discarding material when the screw or nail is driven into the floor base panel, and the screw penetrates the discarding material. Alternatively, there is a disadvantage that the part around the nail is greatly raised downward. In addition, since the floor finish material is fixed on the scraping material by driving in screws or nails, if the screw or nail penetrates the scraping material and reaches the floor base panel, it is discarded as above. A disadvantage arises in that the screw or nail surrounding portion on the lower surface side of the upholstery material is greatly raised. When large bumps are generated on the lower surface side of the scraping material in this way, a gap is generated between the scraping material and the floor base panel, so that a person on the floor finishing material corresponding to the portion where the clearance has occurred There is a problem that when you step on it, the floor will squeal.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a floor structure capable of reducing floor noise that occurs when a person steps on the floor finishing material. That is.

In order to achieve the above object, a floor structure according to the present invention includes a first floor base material supported at a predetermined height from the foundation floor by a plurality of support legs standing on the base floor, and a first floor base material. Second floor base material laid and fixed on top, a plurality of floor finishing materials laid and fixed on the second floor base material, and each floor finishing material fixed to the second floor base material And a fixing member. The second floor base material has a lower surface in contact with the upper surface of the first floor base material, and each floor finishing material has a lower surface in contact with the upper surface of the second floor base material and a direction in which the floor finishing materials are arranged. Each floor finish has a male ridge provided at one end of the floor finish and a female ridge provided at an end opposite to the end provided with the male ridge. Each floor finishing material is connected by joining the male ridge portion of the wood and the female ridge portion of the other floor finishing material adjacent to the floor finishing material, and the fixing member is connected to each floor finishing material from each floor finishing material. is driven into the male seat root of finish through the second underfloor member, the tip of the fixing member remains in the first underfloor member within. And a 2nd floor base material consists of a particle board obtained by carrying out the hot-pressure shaping | molding of the aggregate of the wood piece which apply | coated the adhesive agent to plate shape.

In this floor structure , the second floor base material is composed of particle boards obtained by hot-pressing a collection of small pieces of wood coated with an adhesive into a plate shape. In general, a particle board includes a large number of voids between small pieces of wood in its interior as compared with a hard board or a high density fiber board. Thus, the raised fixing member (a screw or nail) when fixing the floor covering to the second underfloor member dedicated to male seat root of the floor covering, to the lower side of the second underfloor member by penetrating the fixing member The part to be absorbed is absorbed to some extent by the gap, and the amount of the peripheral portion of the screw or nail protruding downward on the lower surface side of the second floor base material can be reduced. Thereby, since the clearance gap between the 2nd floor base material and the 1st floor base material formed resulting from the protrusion of the lower surface side of this 2nd floor base material can be reduced, from above floor finishing material It is possible to reduce floor noise that occurs when a person steps on the floor.

As specific example of the configuration of the floor structure, particle board can be configured to have a density below 0.78 g / cm ³ or more 0.9 g / cm ^3.

In the above floor structure, particle board preferably has a 20 N / mm ² or more 30 N / mm ² or less bending strength. With this structure, JIS (Japanese Industrial Standard) by a defined 18 types of particle board bending strength standards and is 18N / mm ² or more as the range of 20 N / mm ² or more 30 N / mm ² or less in that Since the particle board having a large bending strength can be used as the second floor base material, the rigidity of the floor structure can be increased.

  As described above, in the floor structure according to the present invention, it is possible to reduce the gap between the second floor base and the first floor base formed due to the bulge on the lower surface side of the second floor base material. Therefore, it is possible to reduce floor noise that occurs when a person steps on the floor finishing material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a partial cross-sectional perspective view showing the structure of a floor structure according to an embodiment of the present invention. FIG. 2 is a plan view showing a configuration when the floor structure shown in FIG. 1 is applied to a floor of a room, and FIG. 3 is a longitudinal sectional view of the floor structure shown in FIG. FIG. 4 is a cross-sectional view showing a partially enlarged structure for fixing the disposing material 2 in the floor structure shown in FIG. 1, and FIG. 5 is an illustration of fixing the flooring material 3 in the floor structure shown in FIG. It is sectional drawing which expanded and showed the structure partially. First, with reference to FIGS. 1-5, the structure of the floor structure by one Embodiment of this invention is demonstrated.

  The floor structure according to the present embodiment includes a floor base unit 1, a scraping material 2 (second floor base material), a flooring material 3 (floor finishing material), and fixing members 4 and 5.

  As shown in FIGS. 1 and 3, the floor foundation unit 1 is arranged on a foundation floor 100 such as a concrete slab and serves as a base of a floor structure. Each floor foundation unit 1 includes support legs 11 and a floor foundation panel 12 (first floor foundation material).

  The support legs 11 stand on the foundation floor 100 and support the floor foundation panel 12 from below. The support legs 11 are provided at the center of the floor foundation panel 12, the corners of the floor foundation panel 12, and intermediate positions between predetermined corners of the peripheral edge of the floor foundation panel 12. Moreover, the support leg 11 is comprised by the attaching part 11a, the support | pillar part 11b, and the rubber seat 11c.

  The attachment portion 11a is a portion attached to the lower surface of the floor foundation panel 12, and is attached to a location corresponding to a through hole 12a described later of the floor foundation panel 12. Further, the mounting portion 11a is provided with a through-hole (not shown) penetrating vertically, and the through-hole (not shown) of the mounting portion 11a and the through-hole 12a of the floor base panel 12 communicate with each other. As described above, the attachment portion 11 a is attached to the lower surface of the floor foundation panel 12. And the internal thread part (not shown) for attaching the support | pillar part 11b is provided in the inner wall face of the through-hole (not shown) of the attaching part 11a.

  The column part 11b is a round bar-like member installed so as to extend perpendicularly to the foundation floor 100, and is attached to the attachment part 11a. A male screw part (not shown) is formed on the peripheral surface of the upper part of the column part 11b, and this male screw part (not shown) is screwed into the female screw part (not shown) of the mounting part 11a. Thus, the column portion 11b is attached to the attachment portion 11a. Further, a screw head 11d is provided at the upper end portion of the column portion 11b. The screw head 11d can be turned by inserting a screwdriver through the through hole 12a of the floor base panel 12. Then, by turning the screw head 11d in this manner, the male screw portion (not shown) of the support column portion 11b can be screwed, and the length of the portion protruding downward from the mounting portion 11a of the support column portion 11b can be adjusted. It is like that. Thereby, the length of the support leg 11 is adjusted to adjust the height position of all floor foundation panels 12 from the upper face of the foundation floor 100, and the upper face of each floor foundation panel 12 is adjusted to be flush with each other. Is possible.

  The rubber seat 11c is a rubber pedestal attached to the lower end of the support column 11b. When the support leg 11 is erected on the foundation floor 100, the rubber seat 11 c comes into contact with the upper surface of the foundation floor 100. The rubber seat 11c has a function of absorbing shocks and vibrations transmitted from the floor. Moreover, the part located between the lower end of the support | pillar part 11b of the rubber seat 11c, and the upper surface of the foundation floor 100 has a thickness of about 15 mm.

  The floor foundation panel 12 is made of a particle board or the like having a thickness of about 20 mm, and is formed in a rectangular shape. As shown in FIG. 2, the floor foundation panel 12 may be formed in an L shape or other shapes depending on the location of the floor foundation panel 12 in the room. Further, through holes 12 a are respectively provided at the center of the floor foundation panel 12, each corner of the floor foundation panel 12, and an intermediate position between predetermined corners on the peripheral edge of the floor foundation panel 12. The mounting portions 11a of the support legs 11 are respectively attached to the through holes 12a as described above, and the floor base panel 12 is supported at a predetermined height from the foundation floor 100 by the support legs 11. . In addition, the floor foundation units 1 are arranged on the foundation floor 100 so that each floor foundation panel 12 has a predetermined gap between other floor foundation panels 12 adjacent to each other.

  The discard material 2 is laid and fixed on the floor foundation panel 12 of the floor foundation unit 1. Each scraping material 2 is arranged on the floor foundation panel 12 in a state where a predetermined gap is provided between the other scraping materials 2 adjacent thereto. In addition, each of the flooring materials 2 is installed across a plurality of floor foundation panels 12, and the plurality of floor foundation panels 12 are integrated by the disposal material 2.

In this embodiment, a particle board having a thickness of about 9 mm is used as the scraping material 2. This particle board is obtained by hot-pressing a collection of small pieces of wood coated with an adhesive into a plate shape. Generally, it is compared with hardboards or high-density fiberboards. Contains many voids between small pieces of wood. Further, particle board used in捨張Ri material 2 of this embodiment, about 0.78 g / cm ³ or more about a 0.9 g / cm ³ or less of the density, bending about 20 N / mm ² or more to about 30 N / mm ² or less It has strength. Generally, according to JIS (Japanese Industrial Standard), the density of the particle board is 0.4 g / cm ³ or more and 0.9 g / cm ³ or less, and the bending strength is 18 N / mm ² or more for 18 type particle boards. . Therefore, a particle board having a relatively high density and bending strength is used for the scraping material 2 according to the present embodiment.

  Further, the scraping material 2 is fixed on the floor base panel 12 using the fixing member 4 made of screws or nails. Specifically, the fixing member 4 is driven at a predetermined interval along the peripheral edge of each sagging material 2. Each fixing member 4 is driven vertically from the upper surface side of the scraping material 2 as shown in FIG. 4, and passes through the scraping material 2 to reach the floor base panel 12 so that the scraping material 2 is moved under the floor. It is fixed on the ground panel 12.

  The flooring material 3 is laid and fixed on the scraping material 2. The flooring material 3 is fixed on the scraping material 2 using the fixing member 5 made of screws or nails. Specifically, each flooring material 3 has a male ridge portion 3a on one end side and a female ridge portion 3b on the other end side. Then, as shown in FIG. 5, the fixing member 5 is driven obliquely into the male ridge portion 3 a of each flooring material 3 from above, and the fixing member 5 penetrates the disposing material 2 and reaches the floor base panel 12. Thus, the flooring material 3 is fixed on the disposing material 2. The fixing member 5 is driven into the male ridge 3 a at a predetermined interval along the longitudinal direction of the flooring material 3. Moreover, the female ridge part 3b of each flooring material 3 is faced | matched and joined with the male ridge part 3a of the other adjacent flooring material 3. FIG. Thereby, each flooring material 3 is laid in close contact with the discard material 2.

  As described above, in the floor structure according to the present embodiment, the scraping material 2 laid and fixed on the floor foundation panel 12 is formed by hot-pressing a collection of small pieces of wood coated with an adhesive into a plate shape. It consists of an obtained particle board, and contains a large number of voids between small pieces of wood inside. On the other hand, the hard board or high-density fiber board used for the conventional scraping material 102 (see FIGS. 6 and 7) is formed by hot-pressing an aggregate of wood fibers to be hardened to a high density. Due to this, the amount of voids contained in the interior is considerably reduced. When the fixing member 4 is driven in and the discarding material 102 is fixed on the floor foundation panel 12, the lower surface of the discarding material 102 as the fixing member 4 penetrates the discarding material 102 as shown in FIG. The surrounding portion of the fixing member 4 on the side protrudes downward, but the amount of voids contained inside is considerably reduced as described above in the discard material 102 made of the conventional hard board or high-density fiber board. As a result, it becomes difficult to absorb the fixed members 4 and 5 to be driven in the gap inside the scraping material 102, and the amount of bulging α1 on the lower surface side of the scraping material 102 increases. In addition, as shown in FIG. 7, when the fixing member 5 is driven into the male shank 3 a and the flooring material 3 is fixed on the disposing material 102, the fixing member 5 penetrates the disposing material 102. Thus, the peripheral portion of the fixing member 5 on the lower surface side of the scraping material 102 protrudes downward, and the amount α2 of the protrusion increases in the same manner as described above with the scraping material 102 made of a conventional hardboard or high-density fiberboard. And when a bump is formed on the lower surface side of the scraping material 102, a gap S is formed between the scraping material 102 and the floor foundation panel 12 due to this, but the above-mentioned bump amounts α1 and α2 are As the size increases, the gap S also increases. And when a large gap S is formed between the scraping material 102 and the floor foundation panel 12 in this way, when a person steps on a portion on the flooring material 3 corresponding to the place where the gap S is formed, There is a floor ringing consisting of a drum-like sound and other various sounds.

  On the other hand, the discarding material 2 made of the particle board according to the present embodiment includes a large number of gaps between the small pieces of wood inside as described above. The amount of bulging toward the lower surface side is absorbed to some extent by the gap, and the amount of bulging α1 and α2 below the surrounding portions of the fixing members 4 and 5 on the lower surface side of the scraping material 2 can be reduced. Thereby, the clearance gap between the refining material 2 and the floor base panel 12 formed resulting from the protrusion on the lower surface side of the refining material 2 can be reduced, and when a person steps on the flooring material 3 The floor noise as described above can be reduced.

Further, in the present embodiment, since the particle board for use in捨張Ri member 2 has about 20 N / mm ² or more to about 30 N / mm ² or less of bending strength, bending 18 types of particle board defined in JIS strength it is possible to use a particle board having about 20 N / mm ² or more to about 30 N / mm ² or less as large bending strength among the range of 18N / mm ² or more is a standard as捨張Ri material 2, the floor structure rigidity Can be increased. Moreover, if each floor foundation unit 1 is installed on the foundation floor 100 in a state where a predetermined gap is provided between the floor foundation panels 12 as described above, the rigidity of the entire floor structure is likely to be lowered. Since a plurality of floor foundation panels 12 are integrated by using a particle board having a large bending strength as the scraping material 2, a decrease in rigidity of the floor structure due to such a gap between the floor foundation panels 12 is suppressed. be able to.

  Next, the results of the nail pull-out test conducted for examining the nail holding performance of the scraping material according to the above embodiment and the sound insulation test conducted for examining the sound insulation performance of the floor structure according to the above embodiment will be described.

  First, in the nail pull-out test, a 9 mm thick particle board applied to the scraping material of the above embodiment was used as a test specimen. In addition, Lauan plywood, softwood plywood, MDF (medium density fiberboard), and hard board, which are generally used as a scraping material, were used as test specimens for comparison. These lauan plywood, softwood plywood and MDF were 9 mm thick, and the hard board was 10 mm thick. Then, as shown in FIG. 8, 12 mm thick plywood flooring materials were stacked on these various scraping materials, and a screw nail having a length of 38 mm was obliquely driven into the male ridge portion of the plywood flooring material. This screw nail was driven from the male ridge portion of the plywood flooring to a position penetrating the above various scraping materials, and the plywood flooring and the respective scraping materials were fixed to each other. In this way, five test specimens with different types of scraping material were prepared. And the nail head side of the screw nail of each test body was grasped with a predetermined jig and pulled out vertically by a pulling tester, and the maximum strength of the resistance force at that time was measured. The results are shown in Table 1 below.

  From Table 1 above, it can be seen that among all the test specimens, the test specimen using the 9 mm-thick particle board according to the above embodiment as the scraping material exhibits the highest pulling strength (83 kgf) of the nail. In particular, the pull-out strength (83 kgf) of the test specimen using this particle board as the scraping material is 83 kgf. It is greater than the strength (76 kgf), and it can be seen that the scraping material made of the particle board according to the above embodiment has an advantage over the scraping material made of the hard board in the holding performance of the nail. Therefore, when fixing the flooring material with a nail on the scraping material, by using the scraping material made of the particle board according to the above embodiment, the flooring material is used more than when using the scraping material made of other materials. It was found that it can be fixed securely.

  Next, in the sound insulation test, a test was performed in accordance with a test method defined in JIS A 1418. In this test, a floor structure similar to that of the above embodiment was installed on a foundation floor made of 150 mm thick concrete slab, and a light floor impact sound generator (tapping machine) and heavy floor impact sound were generated from the flooring material of the floor structure. The device (bang machine) was used to perform the blow. And the floor impact sound generated with the impact was received below the foundation floor, and the sound pressure level of the impact sound was recorded for each frequency band. Light floor impact sound generated by striking a lightweight floor impact sound generator generally sounds downstairs when a relatively hard and lightweight object such as tableware or toys falls on the floor or drags a chair. The heavy floor impact sound generated by striking the heavy floor impact sound generator is generally assumed to sound that echoes downstairs when a child jumps or runs around on the floor. . The result of this sound insulation test is shown in FIG.

  From the results of FIG. 9, in the floor structure according to the above embodiment, the sound pressure level of the light floor impact sound is below the reference line of the level Lr-45 in each frequency band, and the sound pressure level of the heavy floor impact sound is It can be seen that the frequency is below the reference line of level Lr-55 in each frequency band. That is, in the floor structure according to the above embodiment, it can be seen that the estimated value of the light floor impact sound level satisfies LL45 and the estimated value of the heavy floor impact sound level satisfies LH55. In addition, the floor structure having the light floor impact sound level LL45 and the heavy floor impact sound level LH55 satisfies the sound insulation class 1 desirable for sound insulation performance in the sound insulation performance standard of the Architectural Institute of Japan. In the structure, when used on the second floor of a living room of a detached house, it is said that there is almost no complaint from the user in a normal use state as a feeling of life, and there is no problem in sound insulation performance. Therefore, it has been found that the floor structure according to the above embodiment can obtain such a good level of sound insulation performance.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

It is the fragmentary sectional perspective view which showed the structure of the floor structure by one Embodiment of this invention. It is the top view which showed the structure at the time of applying the floor structure shown in FIG. 1 to the floor of a room. It is a longitudinal cross-sectional view of the floor structure shown in FIG. It is sectional drawing which expanded and showed partially the fixing structure of the discard material in the floor structure shown in FIG. It is sectional drawing which expanded and showed partially the fixing structure of the flooring material in the floor structure shown in FIG. It is sectional drawing which showed the fixing structure of the discard material in the floor structure by the comparative example of this invention. It is sectional drawing which showed the fixing structure of the flooring material in the floor structure by the comparative example of this invention. It is sectional drawing which showed the structure of the test body used for the nail pull-out test. It is the figure which showed the result of the sound insulation test of the floor structure by one Embodiment of this invention.

Explanation of symbols

11 Support legs 1 Floor base panel (first floor base material)
2 Waste material (2nd floor ground)
3 Flooring material (flooring material)
4, 5 Fixed member 100 Foundation floor

Claims (3)

A first floor base material supported at a predetermined height from the foundation floor by a plurality of support legs standing on the foundation floor;
A second floor base material laid and fixed on the first floor base material;
A plurality of floor finishing materials laid and fixed so as to line up on the second floor base material;
A fixing member for fixing each floor finish to the second floor base material,
The second floor base material has a lower surface in contact with the upper surface of the first floor base material,
Each floor finishing material includes a lower surface contacting the upper surface of the second floor base material, a male ridge portion provided at one end of the floor finishing material in a direction in which the floor finishing materials are arranged, and An end portion provided with a male ridge portion and a female ridge portion provided at the opposite end portion;
Each floor finishing material is joined by joining the male ridge portion of each floor finishing material and the female ridge portion of another floor finishing material adjacent to the floor finishing material,
The fixing member, the through the respective floor covering the second underfloor member said driven into the male seat root from the floor covering on the tip of the fixing member, the first underfloor member in Stay
The second floor base material is a floor structure made of particle board obtained by hot-pressing an aggregate of wood pieces coated with an adhesive into a plate shape.
The particle board has a density of 0.78 g / cm ³ or more 0.9 g / cm ³ or less, the floor structure of claim 1. The particle board has a 20 N / mm ² or more 30 N / mm ² or less of bending strength, the floor structure according to claim 1 or 2.

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