JP2019143311A - Wooden floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wooden floor structure capable of suppressing propagation of heavy impact sound and obtaining fire resistance. SOLUTION: The wooden floor structure is supported by a wooden floor slab 20, a water retaining material 32 placed on the upper surface of the wooden floor slab 20 and carrying moisture, and a bundle material 40 placed on the wooden floor slab 20. The floor material 50 and the floor material 50 are provided. [Selection diagram] Fig. 1

Description

  The present invention relates to a wooden floor structure.

  The following Patent Document 1 describes a residential structure in which a floor board is formed using CLT (Cross Laminated Timber).

JP-A-2017-53187

  When a wood material such as CLT is used as a floor board as in Patent Document 1, a weight impact sound is easily propagated from the upper floor to the lower floor although it is lighter than when concrete is used. In addition, since woody materials are easier to burn than concrete, the probability that fire spread will increase when a fire occurs.

  In view of the above facts, the present invention has an object to provide a wooden floor structure capable of suppressing the propagation of heavy impact sound and obtaining fire resistance.

  The wood floor structure according to claim 1 is a wooden floor slab, a water retaining material that is placed on the top surface of the wooden floor slab and carries moisture, and a floor material supported by a bundle material placed on the wooden floor slab. And having.

  In the wooden floor structure of claim 1, a water retaining material carrying moisture is placed on the upper surface of the wooden floor slab. This increases the weight of the wooden slab and changes the natural frequency of the wooden slab. As a result, amplification of the weight impact sound due to the resonance phenomenon of the wooden floor slab can be suppressed. In addition, when a fire occurs on the flooring material, the moisture carried on the water retaining material evaporates, and the heat is weakened by taking away the heat of vaporization, and the temperature rise of the wooden floor slab can be suppressed. For this reason, the fireproof performance of the wooden floor slab is improved.

  In the wooden floor structure according to claim 2, the water retaining material is disposed so as to cover an upper surface of the wooden floor slab.

  In the wooden floor structure according to claim 2, the water retaining material is arranged so as to cover the upper surface of the wooden floor slab. Thereby, the water retention layer by a water retention material is formed in the upper part of a wooden floor slab. For this reason, compared with the case where a water retention material is discretely arrange | positioned on the upper surface of a wooden floor slab, for example, fireproof performance becomes high.

  In the wooden floor structure of claim 3, the water retaining material is spread on the upper surface of the wooden floor slab in a state of being enclosed in a container.

  In the wooden floor structure according to the third aspect, the water retaining material is sealed in the container. For this reason, the container can be laid without injecting water. Until the water is injected, the water-retaining material is lightweight and easy to spread.

  The wooden floor structure according to the present invention can suppress propagation of heavy impact sound and obtain fire resistance.

(A) is sectional drawing which shows the wooden floor structure which concerns on embodiment of this invention, (B) is a top view which shows the state by which the water retention bag was spread, (C) is the water retention bag spread in zigzag form It is a top view which shows the state performed. (A) is sectional drawing which shows the state which laid in the wooden floor structure which concerns on embodiment of this invention the bag body in which the dried water retention material was put in the upper surface of a wooden floor slab, (B) is a water retention material It is sectional drawing which shows the modification which has arrange | positioned to the tray-shaped container.

(Wood floor structure)
The wooden floor structure according to the embodiment of the present invention is a floor structure for suppressing the propagation of weight impact sound in the wooden floor slab 20 shown in FIG. The wooden floor structure includes a wooden floor slab 20, a water retaining material 32 that is placed on the top surface of the wooden floor slab 20 and carries moisture, and a flooring 50 that is supported by a bundle 40 placed on the wooden floor slab 20. And.

  The wooden floor slab 20 is formed using CLT. On the wooden floor slab 20, a bundle material 40 is arranged at a predetermined interval, and a flooring material 54 is laid on the bundle material 40 via a base material 52. The base material 52 and the flooring material 54 are combined and referred to as a flooring 50. As the flooring material 54, an arbitrary material such as wood, a composite material of wood and resin, a tile carpet, or the like can be appropriately employed.

  The water retaining material 32 is formed of a highly water-absorbing polymer material (for example, a cellulosic polymer material), and in a non-water retaining state, it is powdery or fibrous and expands by absorbing water and changes into a viscous gel. . As shown in FIG. 1A, the water retaining material 32 is sealed in a water-impermeable bag body 34 in a water-absorbing state and spread on the upper surface of the wooden floor slab 20. The bag 34 is melted by being heated. Specifically, the bag body 34 is formed of a material that melts at a temperature equal to or lower than the boiling point of water. Thereby, when a bag body is exposed to a flame at the time of a fire etc., the bag body 34 melt | dissolves and the water | moisture content carried by the water retention material 32 can evaporate. The water retaining material 32 and the bag body 34 are combined and referred to as a water retaining bag 30. The bag body 34 is an example of a container in the present invention.

  The water retaining bag 30 is disposed in close contact with the bundle 40. That is, the bundle material 40 is disposed so as to be sandwiched between the two water retaining bags 30. As shown in FIG. 1 (B), adjacent water retaining bags 30 are disposed in close contact with each other in a portion other than the portion sandwiching the bundle 40. The water retaining bags 30 may be arranged in two directions as shown in FIG. 1 (B), or may be arranged in a staggered manner as shown in FIG. 1 (C). By doing in this way, the fireproof coating layer by the water retention material 32 is formed in the upper part of the wooden floor slab 20.

  When constructing the water retention bag 30, first, as shown in FIG. 2A, the bag body 34 containing the water retention material 32 in a non-water retention state (dry state) is disposed between the bundle members 40. The bag body 34 is provided with a water supply port (not shown), and water is supplied by inserting the tip of a hose into the water supply port. Thereby, the powdery water retaining material 32 absorbs water and expands, and as shown in FIG. Since the water retaining material 32 containing water is in the form of a gel, the water retaining bag 30 is deformed along the shape of the bundle 40.

(Action / Effect)
According to the wood floor structure according to the embodiment of the present invention, the water retaining bag 30 in which the water retaining material 32 carrying moisture is sealed is placed on the upper surface of the wooden floor slab 20. The water retaining bags 30 are spread so as to be in close contact with the adjacent water retaining bags 30. This increases the weight of the slab formed by the wooden floor slab 20 and changes the natural frequency of the wooden floor slab. Thereby, amplification of the weight impact sound by the resonance phenomenon of the wooden floor slab 20 can be suppressed.

  In addition, the bundle 40 is sandwiched between the water retaining bags 30. Since the water retaining bag 30 is filled with the gel water retaining material, the water retaining bag 30 is deformed along the bundle 40 and is in close contact with the bundle 40. For this reason, the vibration of the bundle material 40 is suppressed and the floor material 50 can be supported stably.

  The wooden floor slab 20 is covered with a water retaining material 32. Thereby, when a fire occurs in the upper space of the flooring 50, it is suppressed that the wooden floor slab 20 is directly burned by flame. Moreover, the water | moisture content carry | supported by the water-retaining material 32 evaporates, and it can suppress a temperature rise of the wooden floor slab 20 while making a fire power weak by depriving heat of vaporization. For this reason, the fireproof performance of the wooden floor slab 20 is improved.

  In the present embodiment, the water retaining material 32 is enclosed in the bag body 34. For this reason, it can be spread on the upper surface of the wooden floor slab 20 without injecting water into the bag 34. Until the water is injected, the water-retaining material 32 is lightweight, so that the laying work is easy. It is also easy to transport from the factory to the construction site.

  The water retaining material 32 changes from powder to gel just by applying water and carries moisture. For this reason, for example, construction is easier than in the case where concrete is placed on top of the wooden floor slab 20 to form a fireproof coating. Furthermore, the water absorption reaction of the water retaining material 32 takes a shorter time than the hardening reaction of concrete. For this reason, a construction period can be shortened.

  Furthermore, the amount of water that can be supported per volume is larger in the water retaining material 32 than in the concrete. For this reason, thickness required as a fireproof coating layer can be made thin. Thereby, for example, floor height can be made small and the usage-amount of building materials can be reduced.

  In addition, since the water retaining material 32 is in a gel form, the sloshing phenomenon in which the liquid is greatly shaken at the time of an earthquake can be suppressed as compared with the case where a liquid having low viscosity is used.

  In this embodiment, the water retaining bag 30 is disposed in close contact with the bundle 40 and the adjacent water retaining bags 30 are disposed in close contact with each other. However, the embodiment of the present invention is not limited thereto. For example, the water retaining bag 30 may not be in close contact with the bundle 40, and the water retaining bags 30 may not be in close contact with each other. Even if they are not brought into close contact with each other, the weight of the slab formed by the wooden floor slab 20 is increased, so that the effect of reducing the weight impact sound can be obtained. Moreover, the fireproof performance of the wooden floor slab 20 is also improved.

  In the present embodiment, the water retaining material 32 is previously placed in the bag body 34 and water is supplied at the construction site. However, the embodiment of the present invention is not limited thereto. For example, the bag body 34 may be laid on the wooden floor slab 20 in an empty state, and the water retaining material 32 in a state of carrying water may be injected with a flexible hose or the like. By doing in this way, it can suppress that the injection | pouring amount of water produces bias | inclination. For this reason, the water retention amount of the water retention material 32 can be stabilized.

  Moreover, in this embodiment, although the bag body 34 was formed with the raw material melt | dissolved at the temperature below the boiling point of water, embodiment of this invention is not restricted to this. For example, it is not necessary to melt if it is a material that allows steam to pass through without passing water. As a material that allows vapor to pass through without passing water, a breathable film or the like in which fine holes are formed can be used. Or you may use the raw material provided with the mechanism which a part breaks | ruptures and vapor | steam escapes, when the water | moisture content of the water retention material 32 evaporates and the pressure inside the bag body 34 becomes large.

  Moreover, in this embodiment, although the water retention material 32 shall be enclosed in the inside of the bag body 34, embodiment of this invention is not restricted to this. For example, the water retaining material 32 may be disposed in a tray-like container 36 as shown in FIG. When the container 36 having an open top is used as described above, water can be easily supplied at the construction site. In addition, when using the material which water | moisture content evaporates at normal temperature as the water retention material 32, after making the water retention material 32 absorb water, it is suitable to cover the container 36 with a water-impermeable cover.

  Thus, the state of “arranged so as to cover the upper surface of the wooden floor slab” in the present invention is not only the state of covering the entire surface of the wooden floor slab 20, but depending on the shape of the container for storing the water retaining material 32. , Including a state of having a part that is not partially covered.

  Moreover, in this embodiment, although the water retention material 32 shall be laid only on the upper surface of the wooden floor slab 20, embodiment of this invention is not restricted to this. For example, the board 20A in the inner layer of the lowermost layer of the wooden floor slab 20 shown in FIG. 1 may be partially omitted, and the water retaining material 32 may be injected into the gap formed here. By doing in this way, it becomes difficult to burn the lowermost floor board against a fire that occurs in the lower space of the wooden floor slab 20. Thereby, fireproof performance can further be improved.

  Moreover, in this embodiment, although the wooden floor slab 20 was formed using CLT, embodiment of this invention is not restricted to this. The wooden floor slab 20 may be formed using, for example, laminated timber or LVL, or may be formed by arranging standard timbers such as two-by-four materials. Or it is good also as a floor formed using floor beams, joists, and plywood.

20 Wooden floor slab 32 Water retention material 34 Bag (container)
40 Bundles 50 Flooring

Claims (3)

A wooden floor slab,
A water retaining material placed on the top surface of the wooden floor slab and carrying moisture;
A flooring supported by a bundle placed on the wooden floor slab,
Wooden floor structure with   The wooden floor structure according to claim 1, wherein the water retaining material is disposed so as to cover an upper surface of the wooden floor slab. The wooden floor structure according to claim 1 or 2, wherein the water retaining material is spread on an upper surface of the wooden floor slab in a state of being enclosed in a container.