Synthetic Bed Version

Abstract

To provide a composite floor slab that can suppress the seepage of moisture into the wooden floor slab. [Solution] The composite floor slab 20 comprises a wooden floor slab 22, an upper surface waterproof sheet 30 attached to the upper surface of the wooden floor slab 22, and concrete 24 poured on top of the upper surface waterproof sheet 30.

Description

Technical Field

[0001] The present invention relates to a composite floor slab.

Background Art

[0002] The following Patent Document 1 discloses a composite floor structure that can represent the surface of a structural wood. This composite floor includes a wooden floor structure composed of a wood material and a reinforced concrete slab provided on the upper surface of the wooden floor structure.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When constructing a composite floor slab by placing concrete on a wooden floor slab as in the composite floor structure shown in Patent Document 1 above, the moisture in the concrete may penetrate into the wood and seep out on the lower surface of the wooden floor slab, which is the decorative surface, or the moisture content of the concrete may be less than the assumed moisture content.

[0005] In consideration of the above facts, an object of the present invention is to provide a composite floor slab that can suppress the penetration of moisture into the wooden floor slab.

Means for Solving the Problems

[0006] The composite floor slab according to claim 1 includes a wooden floor slab, an upper waterproof sheet pasted on the upper surface of the wooden floor slab, a displacement preventing member protruding from the upper waterproof sheet onto the wooden floor slab, and concrete placed on the upper waterproof sheet with the displacement preventing member embedded therein.

[0007] In the composite floor slab of claim 1, the top waterproof sheet can suppress the seepage of moisture from the concrete to the wooden floor slab. Furthermore, when concrete is poured on-site, it can suppress the seepage of rain before pouring.

[0008] The composite floor slab of claim 2 is the composite floor slab of claim 1, further comprising: a bottom waterproof sheet that covers the lower surface of the wooden floor slab and is folded up on the end face of the wooden floor slab; and an end tape that covers the end face of the wooden floor slab and is superimposed on the folded portion of the bottom waterproof sheet from the outside.

[0009] In the composite floor slab of claim 2, the waterproof sheet on the underside can suppress the seepage of rain into the wooden floor slab during transportation and construction.

[0010] Furthermore, since the underside waterproof sheet is folded up to the end face of the wooden floor slab and the end-face tape is applied over it from the outside, the waterproofing performance on the underside of the wooden floor slab is higher compared to a configuration without overlapping tape.

[0011] The composite floor slab of claim 3 is the composite floor slab of claim 2, wherein an opaque sheet is superimposed on the outside of the bottom waterproof sheet.

[0012] Opaque sheets transmit light less easily than transparent sheets. As a result, the composite floor slab of claim 3 can suppress sun damage to the wooden floor slab during construction compared to a configuration without an opaque sheet. In particular, it can suppress color unevenness caused by the difference in the degree of sun damage between the surface that is concealed by shoring and the surrounding surface. [Effects of the Invention]

[0013] According to the present invention, it is possible to suppress the penetration of moisture into the wooden floor slab. [Brief explanation of the drawing]

[0014] [Figure 1] (A) is an elevation view showing an example of a composite floor slab according to an embodiment of the present invention, and (B) is a partially enlarged elevation cross-sectional view of the composite floor slab. [Figure 2](A) is a partially enlarged vertical cross-sectional view of a wooden floor slab according to an embodiment of the present invention, (B) is a partially enlarged vertical cross-sectional view showing the lower surface of the wooden floor slab covered with a bottom waterproof sheet, and (C) is a partially enlarged vertical cross-sectional view showing the upper surface of the wooden floor slab covered with a top waterproof sheet. [Figure 3] (A) is a partially enlarged vertical cross-sectional view showing the end edges of a wooden floor slab according to an embodiment of the present invention covered with end-edge tape, (B) is a partially enlarged vertical cross-sectional view showing the outside of the bottom waterproof sheet covered with an opaque sheet, and (C) is a partially enlarged vertical cross-sectional view showing lag screw bolts driven into the wooden floor slab. [Figure 4] This is a partially enlarged vertical cross-sectional view of a composite floor slab according to a modified example. [Modes for carrying out the invention]

[0015] Hereinafter, a composite floor slab according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are considered to be the same component. However, unless otherwise specified in the specification, each component is not limited to one, and there may be multiple such components.

[0016] Furthermore, explanations of redundant components and reference numerals in each drawing may be omitted. This disclosure is not limited to the following embodiments, and modifications can be made as appropriate within the scope of the purpose of this disclosure, such as omitting components, substituting them with different components, or combining one embodiment with various modifications.

[0017] <Synthetic floor slab> Figure 1 shows a composite floor slab 20 according to an embodiment of the present invention. The composite floor slab 20 is a precast slab material formed by integrating a wooden floor slab 22 and concrete 24 poured on top of the wooden floor slab 22.

[0018] The wooden floor slab 22 is formed using, for example, CLT (Cross Laminated Timber) and functions as a formwork when placing the concrete 24. The back surface of the wooden floor slab 22 is a finished surface that can be viewed from below after construction. Therefore, the wooden floor slab 22 also functions as a decorative material.

[0019] The wood used to form the wooden floor slab 22 is not limited to CLT. For example, various laminated materials such as LVL (Laminated Veneer Lumber), NLT (Nail Laminated Timber), DLT (Dowel Laminated Timber), and plywood can be used.

[0020] As shown in FIG. 1(B), lag screw bolts B for suppressing the displacement between the wooden floor slab 22 and the concrete 24 and transmitting stress therebetween are driven at predetermined intervals on the upper surface of the wooden floor slab 22.

[0021] (Waterproof sheet) The wooden floor slab 22 is covered with a waterproof sheet. Specifically, the upper surface, lower surface, and end face of the wooden floor slab are each covered with a waterproof sheet of polyethylene or polyvinyl chloride. Among these, the one covering the upper surface of the wooden floor slab is called the upper surface waterproof sheet 30, the one covering the lower surface is called the lower surface waterproof sheet 32, and the one covering the end face is called the end tape 34.

[0022] The upper surface waterproof sheet 30 covers substantially the entire upper surface of the wooden floor slab 22. Also, the outer peripheral portion of the upper surface waterproof sheet 30 is folded down to the end face of the wooden floor slab 22. This portion is overlapped and pasted (with the upper surface waterproof sheet 30 on the outside) on the outer peripheral portion of the lower surface waterproof sheet 32 folded up to the end face, as will be described later.

[0023] The upper surface waterproof sheet 30 may or may not adhere the end portion (the folded-down portion) to the end face and the lower surface waterproof sheet 32 of the wooden floor slab 22.

[0024] The bottom waterproofing sheet 32 ​​covers the entire underside of the wooden floor slab 22. The outer periphery of the bottom waterproofing sheet 32 ​​is folded up to the end face of the wooden floor slab 22. As described above, this portion is overlapped with the outer periphery of the top waterproofing sheet 30, which is folded down to the end face (with the bottom waterproofing sheet 32 ​​on the inside).

[0025] The bottom waterproof sheet 32 ​​may or may not have its edges (folded-up portions) adhered to the end faces of the wooden floor slab 22.

[0026] The edge tape 34 covers the overlapping portion of the lower waterproof sheet 32 ​​and the upper waterproof sheet 30 around all four sides of the wooden floor slab 22. In addition, the edge tape 34 is applied from the outside to overlap the folded portion of the lower waterproof sheet and the folded portion of the upper waterproof sheet 30.

[0027] The edge tape 34 covers the four sides of the wooden floor slab 22 by wrapping it around the wooden floor slab 22, for example. The number of times it is wrapped is not particularly limited, and it may be wrapped multiple times. However, in each figure of this specification, the number of wraps is one.

[0028] Furthermore, the edge tape 34 only needs to be placed across at least the edge of the upper waterproof sheet 30. In other words, it only needs to cover the boundary between the upper waterproof sheet 30 and the lower waterproof sheet 32.

[0029] Furthermore, while waterproof tape 34 is preferable, it is not necessary for the end cap tape 34 to have waterproof properties, as the end surfaces of the wooden floor slab 22 are covered by the upper waterproof sheet 30 and the lower waterproof sheet 32. The end cap tape 34 only needs to have the ability to secure the edges of the upper waterproof sheet 30 so that they do not peel off.

[0030] (Opaque sheet) An opaque sheet 40 is superimposed on the outside (bottom) of the bottom waterproof sheet 32. The opaque sheet 40 may be adhered to the bottom waterproof sheet 32, or its edges may be fixed to the bottom waterproof sheet 32 ​​with adhesive tape or the like without being adhered.

[0031] The opaque sheet 40 may be replaced with a transparent or translucent sheet, as long as it has the function of reducing ultraviolet rays irradiated onto the wooden floor slab 22 and suppressing sunburn of the wooden floor slab 22. Furthermore, the underside waterproof sheet 32 ​​and the opaque sheet 40 may be used interchangeably. In other words, the composition of the sheet is not particularly limited as long as the underside of the wooden floor slab 22 is waterproof and sunburn suppressed.

[0032] <Manufacturing method for composite floor slabs> To manufacture the composite floor slab 20, first, the bottom waterproof sheet 32 ​​is fixed to the wooden floor slab 22 shown in Figure 2(A), as shown in Figure 2(B). At this time, the edges of the bottom waterproof sheet 32 ​​are folded up to the end face of the wooden floor slab 22.

[0033] Next, as shown in Figure 2(C), the top waterproof sheet 30 is fixed to the wooden floor slab 22. At this time, the end of the top waterproof sheet 30 is folded down to the end face of the wooden floor slab 22 and overlapped with the end of the bottom waterproof sheet 32. In this way, the waterproof sheets are applied from the bottom to the top. Then, as shown in Figure 3(A), the end of the top waterproof sheet 30 is covered with end cap tape 34.

[0034] Next, as shown in Figure 3(B), an opaque sheet 40 is fixed to the wooden floor slab 22. Then, lag screw bolts B are driven into the wooden floor slab 22 from above the top waterproof sheet 30. By pouring concrete 24 onto the top surface of this wooden floor slab 22, the composite floor slab 20 shown in Figure 1 is manufactured. The concrete 24 is poured in the factory, and the composite floor slab 20, in which the wooden floor slab 22 and concrete 24 are integrated, is transported to the site.

[0035] Furthermore, the concrete 24 may be poured on-site. Alternatively, the concrete 24 may be partially poured in a factory, and the remaining parts (for example, joints between composite floor slabs 20 or fixing parts of the composite floor slabs 20 to the building frame) may be poured on-site.

[0036] The underside waterproof sheet 32 ​​and opaque sheet 40 of the composite floor slab 20 are removed at a predetermined time after the composite floor slab 20 has been installed in the building. For this reason, considering ease of removal, it is preferable that the underside waterproof sheet 32 ​​is not adhered to the wooden floor slab 22.

[0037] <Mechanism and Effects> In the composite floor slab 20 according to the embodiment of the present invention, the upper waterproof sheet 30 shown in Figure 1(B) can suppress the seepage of moisture from the concrete 24 to the wooden floor slab 22. Furthermore, when the concrete 24 is poured on site, the seepage of rainwater before concrete pouring can be suppressed after the wooden floor slab 22 has been installed on site.

[0038] Furthermore, in the composite floor slab 20 according to the embodiment of the present invention, the waterproof sheet 32 ​​on the bottom surface and the edge tape 34 can suppress the seepage of rain into the wooden floor slab 22 during transportation and construction.

[0039] Furthermore, the bottom waterproof sheet 32 ​​is folded up to the end face of the wooden floor slab 22, and the top waterproof sheet 30 is folded down to the end face of the wooden floor slab 22, and these are overlapped. In addition, the end-edge tape 34 is overlapped from the outside onto the top waterproof sheet 30 and the bottom waterproof sheet 32. As a result, the waterproofing of the underside of the wooden floor slab 22 is higher compared to a configuration without overlapping.

[0040] Furthermore, compared to a configuration where the upper waterproof sheet 30 is laid on the inside and the lower waterproof sheet 32 ​​is laid on the outside, this configuration makes it more difficult for rainwater from above to penetrate the underside of the wooden floor slab 22, resulting in superior waterproofing.

[0041] Furthermore, in the composite floor slab 20 according to the embodiment of the present invention, an opaque sheet 40 is superimposed on the outside of the bottom waterproof sheet 32.

[0042] The opaque sheet 40 transmits less light compared to the transparent sheet. This suppresses sun damage to the wooden floor slab 22 during construction compared to a configuration without the opaque sheet 40. In particular, it suppresses color unevenness caused by differences in the degree of sun damage between surfaces concealed by shoring and the surrounding surfaces.

[0043] <Other Embodiments> In the above embodiment, an opaque sheet 40 is layered on the outside of the bottom waterproof sheet 32, but the embodiments of the present invention are not limited to this. For example, the opaque sheet 40 may be omitted.

[0044] Furthermore, in the above embodiment, the end faces of the wooden floor slab 22 are layered with the bottom waterproof sheet 32, the top waterproof sheet 30, and the end tape 34 in that order from the inside outwards, but the embodiments of the present invention are not limited to this.

[0045] For example, as shown in Figure 4, the end faces of the wooden floor slab 22 may be covered with a bottom waterproof sheet 32, end tape 34, and top waterproof sheet 30 in that order, from the inside out. By forming it in this way, the upper ends of the bottom waterproof sheet 32 ​​and end tape 34 are covered, making it difficult for rainwater and the like to penetrate the underside of the wooden floor slab 22 from above.

[0046] With this configuration, the bottom waterproof sheet 32 ​​and the edge tape 34 should be overlapped, and the edge tape 34 and the top waterproof sheet 30 should also be overlapped. In this case, the bottom waterproof sheet 32 ​​and the top waterproof sheet 30 do not need to be overlapped.

[0047] Furthermore, in the above embodiment, the edges of the underside waterproof sheet 32 ​​covering the underside of the wooden floor slab 22 are folded up to the end face of the wooden floor slab 22, but the embodiments of the present invention are not limited to this. For example, such a folded portion does not need to be formed.

[0048] Similarly, in the above embodiment, the edges of the upper waterproof sheet 30 covering the upper surface of the wooden floor slab 22 are folded down to the end face of the wooden floor slab 22, but the embodiments of the present invention are not limited to this. For example, such a folded-down portion does not need to be formed.

[0049] Furthermore, the edge tape 34 may be omitted regardless of whether the bottom waterproof sheet 32 ​​is folded up to the end face of the wooden floor slab 22, or whether the top waterproof sheet 30 is folded down to the end face of the wooden floor slab 22. In addition, the bottom waterproof sheet 32 ​​may also be omitted.

[0050] In other words, in this invention, if an upper waterproof sheet 30 is provided between the wooden floor slab 22 and the concrete 24, the lower waterproof sheet 32, edge tape 34, and opaque sheet 40 can be omitted as appropriate. Even if these sheets are omitted, the penetration of moisture from the concrete 24 into the wooden floor slab 22 can be suppressed.

[0051] Furthermore, in the above embodiment, lag screw bolts B are used as anti-slip members between the wooden floor slab 22 and the concrete 24, but the embodiments of the present invention are not limited to this. For example, protrusions as cotters may be formed on the wooden floor slab 22. In this case, it is preferable to lay the upper waterproof sheet 30 so that it is in close contact with these protrusions. Thus, the present invention can be implemented in various forms. [Explanation of Symbols]

[0052] 20 Composite floor slab 22 Wooden floor slab 24 Concrete 30 Top waterproof sheet 32. Bottom waterproof sheet 34 Edge Tape 40 opaque sheets

Claims

1. Wooden floor slabs, The upper surface waterproof sheet attached to the upper surface of the aforementioned wooden floor slab, Concrete poured on top of the aforementioned upper waterproof sheet, A composite floor slab equipped with [a specific feature / feature].

2. A waterproof sheet covering the underside of the wooden floor slab, which is folded up on the end face of the wooden floor slab, The end face of the aforementioned wooden floor slab is covered, and the end face tape is applied from the outside to the folded portion of the aforementioned underside waterproof sheet, A composite floor slab according to claim 1, comprising the features described above.

3. An opaque sheet is layered on the outside of the aforementioned bottom waterproof sheet. The composite floor slab according to claim 2.

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