JPH047314Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates generally to architectural boards, and in particular to floor boards.

BACKGROUND OF THE INVENTION Conventionally, processed wood substrates such as planks sawn from natural wood, plywood, fiberboard, and particle board, each having a rectangular surface, have been used as architectural floorboards. These architectural floorboards are placed side by side on floor joists that are fixedly arranged at intervals and nailed from the surface, or they are actually processed in the longitudinal and width directions and then installed on the floor joists. The parts were assembled and fixed one after another, starting with the machined part. Fixed floorboards tend to bend toward the back side between the joists due to the load received from the front side, and the load from walking causes the board to bend in the length direction and take on a concave shape, causing adjacent planks in the width and length directions to bend. This causes rubbing between the parts and the resulting squeaks. In addition, in order to support the load from the surface side and prevent bending and warping, their thickness was usually 12 mm or more. For this reason, the construction board itself becomes heavy, making it difficult to transport and
This requires a lot of labor during construction, and is also a cause of high costs.

Purpose of the invention Therefore, the purpose of the present invention is to provide a lightweight and inexpensive construction board that is less likely to bend, warp, or creak after construction.

Structure of the invention According to the invention, in a construction board that has a rectangular board surface and has been subjected to actual processing in the longitudinal direction and/or the width direction, as required, At least the front surface is curved so as to be convex toward the front side. The degree of curvature is preferably such that it exhibits sufficient strength to withstand loads acting from the surface side over the expected service life of the building board, taking into account the width of the expected load and the material used. , and is appropriately selected to flatten the surface and maintain the flat surface if the central portion is bent or warped as a result of a large load being applied over a long period of time.

DESCRIPTION OF EMBODIMENTS Figures 1a and b show cross-sectional views in the width direction of three embodiments of architectural floorboards according to the present invention, and Figure 2 shows embodiment a nailed onto floor joists. It shows.

The present invention will be further described below with reference to these accompanying drawings.

In FIGS. 1a and 1b, an architectural board 10 having a rectangular board surface includes a substrate 11 such as a board sawn from natural wood, a processed wood board such as plywood, fiberboard, particle board, etc. The decorative surface 12 is formed by an appropriate method such as pasting a veneer veneer, pasting a decorative synthetic fiber sheet, or printing a pattern on the surface. However, the decorative surface 12 is not essential. Further, the substrate 11 is illustrated as having been actually processed in the longitudinal direction and/or the width direction, or in the end of one of them. In these embodiments, the end of the wood in the longitudinal direction is processed into a male seed 13 and a female seed 14.

In the embodiment shown in FIG. 1a, only the front side 15 is a convex curved surface in the cross-sectional view in the width direction, and the back side 16 is a convex curved surface.
is becoming flat. In the embodiment shown in FIG. 1b, both the front side 15 and the back side 16 are convex curved surfaces in the cross-sectional view in the width direction.

FIG. 2 shows a side view of the construction board according to the embodiment shown in FIG. 1a, which is installed as a floor board, and adjacent construction boards are shown by dotted lines.

During construction, the architectural floorboard 10 according to the present invention is juxtaposed on the floor joist 16 with the convex surface side 15 facing upward, and is nailed into the concave part of the female joist 14 so as to be adjacent to the nailed female joist 14. Male fruit 1 of architectural floorboard 10
3, and repeat this to fix them in sequence. When a load is applied, the floor surface becomes flat as shown by the dashed line.

Effects of the invention The architectural floorboard according to the invention has an arch-shaped curved surface with a convex surface side in the cross section in the width direction, so it has higher bending strength in the longitudinal direction than a conventional flat floorboard. improve,
Therefore, even when a large load is applied, deflection in the longitudinal direction is unlikely to occur. If an excessive load is applied over a long period of time, the curved surface in the width direction first bends to become nearly flat to absorb the load. At this time, the original curved surface shape will be flattened by the deflection due to the load, so the density will be higher in the flattened surface area, and even if further loads are applied afterwards, the flat surface will remain the same. can be retained for a long period of time. Since deflection in the longitudinal direction, which conventionally caused squeaks, is prevented, the problem of squeaks caused when walking is eliminated. Furthermore, at the initial stage of construction, the curved surface in the width direction has the additional effect of stimulating the arch of the sole of the foot when walking.

Further, in the embodiment shown in FIG. 1b, since the thickness at the center is large, the curvature on the surface side can be made gentle.

[Brief explanation of drawings]

1a and 1b are cross-sectional views in the width direction of two embodiments of the construction board according to the present invention, and FIG.
FIG. 3 is a side view showing the construction state of the construction board according to the embodiment of FIG. a; Explanation of symbols, 10... Architectural board, 11... Substrate, 12... Decorative processed surface, 13... Male fruit, 14
... female fruit, 15 ... obverse side, 16 ... back side, 1
7...Floor joists.

Claims (1)

[Scope of utility model registration request] In an architectural floor board that has a rectangular board surface and is fixed over a subfloor structural material, the thickness in the width direction is increased at the center, and the cross section in the width direction is made so that the surface side is convex. An architectural floorboard characterized by being curved into an arch shape.