JP2758698B2 - Wood tile - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of a wooden tile in which a plywood as a core material is provided with a cut groove to have flexibility or the like.

[Prior Art] In recent years, as this type of wood tile, there is a wood tile having a structure as shown in FIG. The cross plywood 1 is formed by stacking a plurality of layers (5P in this embodiment) of the parallel layer 1a and the cross layer 1b. A large number of cut grooves 4 having a depth of 3.5P are formed from the back of the cross plywood 1, a sound insulation sheet 2 'is laminated on the back of the cross plywood 1, and a decorative veneer 3 is laminated on the surface of the cross plywood 1. I have.

[Problems to be Solved by the Invention] In such a conventional example, the presence of a large number of cut grooves 4 is flexible, but there is a problem in that when humidified, it expands due to moisture absorption and causes a partial rise. For example, a wooden tile with a length of 900 mm (width 141 mm) when humidified (water absorption rate is 9.0%
From 15% to 16%), there was a problem that when four or more sheets were fixed and fixed on both sides and four or more sheets were continuously constructed, a swelling portion was partially generated.

The present invention has been made in view of the above description, and an object of the present invention is to provide a wooden tile capable of reducing expansion and contraction due to moisture absorption.

[Means for Solving the Problems] In order to achieve the above object, the wooden tile of the present invention comprises a parallel layer
A number of grooves 4 and 5 are formed in the cross plywood 1 in which the cross layers 1a and the cross layers 1b are alternately stacked, from the back side and the front side.
The soft sheet 2 was laminated on the back surface of the plywood, the hard sheet 6 was laminated on the front side of the cloth plywood 1, and the decorative veneer 3 was laminated on the hard sheet 6.

[Operation] By providing the cut grooves 5 also from the surface side of the cloth plywood 1, expansion and contraction due to moisture absorption can be reduced, and flexibility can be further improved. Further, by laminating the decorative veneer 3 on the surface with the hard sheet 6 interposed therebetween, the crack resistance can be improved.

Example As shown in FIG. 1, the cross plywood 1 is formed by alternately stacking parallel layers 1a and cross layers 1b. In the case of the present embodiment, the cross layer is 5P, in which the cross layer 1b is laminated above and below the central parallel layer 1a, and the parallel layer 1a is laminated above and below the upper and lower cross layer 1b. One end of the cross plywood 1 is provided with a concave groove 7, and the other end is provided with a convex protrusion 8 fitted into the groove 7. The cross plywood 1 has grooves 4 from the back side and the front side, respectively.
Many 5 are drilled. The cut grooves 4 and the cut grooves 5 are formed alternately. The depth of the cut grooves 4 and 5 is 5P for the cross plywood 1.
Therefore, it is drilled to a depth of about 3.5P. If the cross plywood 1 is 7P, it can be drilled up to 5.5P. Kerf
The width of 4,5 is about 1.6-3.2mm. The interval at which the cut grooves 4 and 5 are provided is about 10 to 30 mm. A soft sheet 2 (rubber hardness) having a high specific gravity (about 1.0 to 3.0) is
(10 to 50 °) by cold press. On the upper surface of the cloth plywood 1, a hard sheet 6 such as a sound insulating sheet (with a rubber hardness of 50 ° or more) having a thickness of about 1.0 to 2.0 mm is provided.
The decorative veneer 3 made of a thin wooden veneer is laminated and adhered to the upper surface of the hard sheet 6. The wooden tiles made in this way are 900 mm long and have a high water absorption.
Elongation is 0.0 when humidified to 15-16% from 9.0%
5mm is 1/4 of the conventional one.

[Effects of the Invention] As described above, the present invention has a large number of cut grooves perforated from the back side and the front side in the cloth plywood, so that the coefficient of expansion at the time of humidification is small, and it is possible to prevent partial rise. Yes,
Moreover, the overall flexibility can be improved, and furthermore, the hard sheet is laminated on the surface side of the cloth plywood and the decorative veneer is laminated on the hard sheet, so that the crack resistance on the surface side can be improved. .

[Brief description of the drawings]

1 is a cross-sectional view of one embodiment of the present invention, and FIG. 2 is a cross-sectional view of a conventional example, wherein 1 is a cross plywood, 1a is a parallel layer, 1b is a cross layer, 2 is a soft sheet, and 3 is a decorative sheet. Single plates, 4 and 5 are cut grooves, and 6 is a hard sheet.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B32B 21/08 B32B 21/08 E04F 15/04 601 E04F 15/04 601E

Claims (1)

(57) [Claims] 1. A cross plywood in which a parallel layer and a cross layer are alternately stacked, a large number of cut grooves are formed from the back side and the front side, a soft sheet is laminated on the back side of the cross plywood, and the front side of the cross plywood A wooden tile formed by laminating a hard sheet and a veneer veneer on the hard sheet.