JP2002227389A - Floor board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor board effectively prevented from warping in width. SOLUTION: A plurality of elongated small square timber 1 formed of a solid material and rectangular in butt end cross section are stuck to each other at the side faces to form glued laminated lumber 2 for the floor board of monolayer plate shape long in the longitudinal direction of the small square timber 1, and the back face of the small square timber 1 is provided with grooves 3 with a depth in a range of 20 to 50% to the thickness of the glued laminated lumber 2 for the floor board, along the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor panel made of a chrysanthemum material.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a floor panel made of a chrysanthemum material (2) has a feeling of weight since it is a chrysanthemum material and has been preferred by many users. However, this is easy to be warped, and when the moisture content of the floor base material on which the floorboard is installed is high, warpage in a concave shape in the width direction, that is, so-called warpage is often caused.

In order to prevent this, a groove (3) having a depth of about 10% with respect to the thickness of the floorboard is provided on the back surface of the floorboard.

[0004] As a result, the warpage of the floorboard can be reduced to some extent, and a measure can be taken.

[0005]

However, in the above-mentioned prior art, the warpage cannot be sufficiently prevented.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a floor panel capable of effectively preventing warpage.

[0007]

In order to achieve the above object, according to the floor panel of the present invention, as described in claim 1, there are a plurality of elongated small members which are made of chrysanthemum and have a rectangular cross section. Along the sides of the small timber, a single-layer plate-like laminated wood for floorboards is formed in the longitudinal direction of the small timber, and the thickness of the laminated timber for floorboards is set along the longitudinal direction on the back of the small timber. Against 2
A groove having a depth in the range of 0 to 50% is provided.

As a result, it is possible to effectively prevent width warpage. That is, the groove described in the prior art has a depth of 1
Since it was around 0%, sufficient warpage countermeasures could not be taken. The present invention sets the depth to be 20
By setting it in the range of 50% to 50%, the bending stress at the time of warpage can be sufficiently reduced, and the warpage can be effectively prevented. By providing such a deep groove in the longitudinal direction, the bending stress at the time of warpage can be sufficiently reduced. In addition, since the grooves are provided on the back surface of the small squares that constitute the laminated glue for the floorboard, there is no fear that the interface will be peeled off on the surface where the small squares are glued together. That is, if a groove is provided in a joint portion between small square bars, there is a risk that interface separation occurs at the joint portion.
ADVANTAGE OF THE INVENTION By providing the groove | channel which is sufficiently effective for width | variety prevention in a small angle | corner timber, the present invention can prevent width | variety warpage without causing interfacial peeling of the laminated wood for floorboards. In addition, by reducing the width warpage, it is well adapted to the floor base material.

Further, in the floorboard of the present invention, as set forth in claim 2, the laminated wood for the floorboard is formed of three or more rows of small squares in the transverse direction, and the small squares of the small squares arranged inside are formed. Among them, at least one small square bar may have a plurality of grooves.

In this case, the groove for reducing the bending stress can be concentrated near the center where the bending stress becomes large, so that the bending stress can be effectively reduced by the groove. That is, since the groove is provided in a portion where the bending stress is most required to be reduced, the efficiency is high.

Further, in the floorboard of the present invention, as described in claim 3, a groove may be provided in the small square wood disposed on the longitudinal side edge of the laminated wood for floorboard.

In this case, the distance to the point of action that determines the bending stress can be reduced, and the warpage can be effectively prevented. That is, by providing a groove in the longitudinal side edge,
The bending stress that increases from the end toward the center is temporarily reduced to near zero by the groove. The bending stress when reaching the groove is small. Decreasing the bending stress to near zero at a small stage, in other words, shortening the distance, thereby effectively reducing the bending stress near the center.

[0013]

1 to 5 show a first embodiment of the present invention.
It is explanatory drawing explaining the floorboard of one Embodiment corresponding to thru | or 3.

As described in claim 1, the floor panel of this embodiment is formed by sticking a plurality of elongated small angle members (1) made of a chrysanthemum material and having a rectangular cross section to each other at their side surfaces. 1) Laminated wood for floorboard in the form of a single-layer plate long in the longitudinal direction (2)
And, on the back surface of the small square wood (1), along the longitudinal direction, 20 to 50 with respect to the thickness of the laminated wood for floorboard (2).
The groove (3) having a depth in the range of% is provided.

Further, in the floorboard of this embodiment, the laminated wood for the floorboard (2) is formed of three or more rows of small square bars (1) in the transverse direction, and is disposed inside. A plurality of grooves may be provided in at least one of the small square members (1) to be formed.

In the floorboard of this embodiment, as described in claim 3, a groove is provided in the small square timber (1 ') disposed at the longitudinal side edge of the floorboard laminated wood (2). There are.

The floorboard of the present embodiment is composed of a glued laminated floorboard (2) formed by sticking a small square bar (1). The small square wood (1) is formed by adhering the side surfaces thereof with a vinyl acetate adhesive in a state of being arranged in three rows in the width direction. A groove (3) is provided on the back surface of the small square bar (1). Two grooves (3) are provided along the longitudinal direction on the back surface of the small square bar (1) provided in the middle, and one each along the longitudinal direction on the back surface of the small square bar (1 ') provided at both ends.
It is provided one by one. The groove (3) has a width of 2
3mm to 7.5mm depth in the range of 3mm to 3mm
Are provided in a rectangular shape in cross section. The thickness of the floorboard is 1
5 mm, the width is 301 mm, and the length is 1818 mm.

A projecting piece (4) projecting outward is provided at one end in the short direction, that is, in the width direction of the floor laminate (2).
The other end is provided with a fitting groove (5) for fitting with the protruding piece (4) of the adjacent floor plate. The tip of the projection piece (4) is rounded. The bottom of the fitting groove (5) is also rounded so as to match the tip of the projection (4).

FIG. 2 shows a laminated wood for floorboards having a thickness of 15 mm (2).
2 shows the ratio of the bending stress corresponding to the depth of the groove (3) provided in FIG. In this figure, when the groove (3) depth is 5 mm, that is, when the ratio of the depth of the groove (3) to the floor laminate (2) is 33%, the state without the groove is set to 100;
Similarly, when the depth of the groove (3) is 6 mm, that is, when the ratio of the depth of the groove (3) is 40%, 40, similarly, the depth of the groove (3) is 7.5 mm.
In this case, that is, when the ratio of the depth of the groove (3) is 50%, a bending stress of 30 is applied. From these results, it can be said that it is best to provide a groove (3) with a thickness of 50% for a 15 mm laminated slab for floorboard (2).

Therefore, according to the floorboard described above,
Width warpage can be effectively prevented. That is, since the depth of the groove (3) described in the prior art is about 10%, sufficient countermeasures cannot be taken. In the present invention, the bending stress at the time of warpage is sufficiently reduced by setting the depth within the range of 20 to 50% with respect to the thickness of the laminated wood for floorboard (2), and the warpage is effectively prevented. be able to. By providing such a deep groove (3) in the longitudinal direction, the bending stress at the time of warpage can be sufficiently reduced. In addition, since the groove (3) is provided on the back surface of the small square wood (1) constituting the glued laminated wood for floorboard (2), there is a concern that interface peeling may occur on the surface where the small square wood (1) and (1 ') are glued together. There is no. In other words, if the groove (3) is provided at the joint between the small angle bar (1) and the small angle member (1 '), there is a risk that interface separation may occur at the joint. In the present invention, by providing the groove (3) which is sufficiently effective for preventing warpage in the small angle material (1), the warped width can be prevented without causing interfacial delamination of the laminated wood for floorboard (2). In addition, by reducing the width warpage, it is well adapted to the floor base material.

Further, since the groove (3) for reducing the bending stress can be concentrated near the center where the bending stress becomes large, the bending stress can be effectively reduced by the groove (3). That is, since the groove is provided in a portion where the bending stress is most required to be reduced, the efficiency is high.

Further, the distance to the point of action that determines the bending stress can be reduced, and the warpage can be effectively prevented. That is, by providing the groove (3 ') at the longitudinal side edge, the bending stress that increases from the end toward the center can be increased.
, Temporarily decreases to near zero. The bending stress when reaching the groove (3 ') is small. Decreasing the bending stress to near zero at a small stage, in other words, shortening the distance, thereby effectively reducing the bending stress near the center.

In addition, other forms as shown in FIGS. 3 to 5 can be considered.

In FIG. 3, the small square bars (1) are arranged in three rows in the width direction, and the grooves (3) are formed in all the small square bars (1) (1 ').
(3 ′) is provided.

In FIG. 4, the small square members (1) are arranged in three rows in the width direction, and two grooves (3) are provided in the middle small square member (1).

In FIG. 5, three small squares (1) are arranged in three rows in the width direction, and one groove (3) is provided in the middle small square (1).

[0027]

As described above, according to the first aspect of the present invention, it is possible to effectively prevent warpage.

According to the second aspect of the present invention, the groove for reducing the bending stress can be concentrated near the center where the bending stress becomes large, so that the bending stress can be effectively reduced by the groove.

According to the third aspect of the present invention, it is possible to reduce the distance to the action point that determines the bending stress, and it is possible to effectively prevent warpage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a floor board according to an embodiment of the present invention when cut in a lateral direction.

FIG. 2 is an explanatory diagram comparing bending stresses by floor depth of a floor plate according to the embodiment.

FIG. 3 is a sectional view of a floor panel according to another embodiment of the present invention.

FIG. 4 is a sectional view of a floor panel according to another embodiment of the present invention.

FIG. 5 is a sectional view of a floor panel according to another embodiment of the present invention.

FIG. 6 is a perspective view of a floor panel according to the related art of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small square wood 2 Glulam for floorboard 3 Groove

Claims (3)

[Claims] 1. A single-layer plate-shaped laminated board for a long single-layer plate in the longitudinal direction of a small square bar, which is formed by sticking a plurality of narrow square bars having a rectangular cross section with a rectangular cross section and made of a solid material.
A floorboard having a groove formed on a back surface of a small square wood along a longitudinal direction so as to have a depth in a range of 20 to 50% with respect to a thickness of the floorboard laminated wood. 2. The laminated lamella for floorboards is formed of three or more rows of small squares in the transverse direction, and a plurality of grooves are provided in at least one small square among the small squares arranged inside. The floorboard according to claim 1, wherein 3. The floorboard according to claim 1, wherein a groove is provided in a small squared wood disposed on a longitudinal side edge of the laminated wood for floorboards.