Combined double-keel decorative board

Abstract

The invention relates to a combined double-keel decorative board. A right additional rib and a left additional rib are located on the two sides of a main rib respectively; a hollow sleeving part is arranged at the upper part of an upper keel; an upper keel right additional rib chase mortise extends transversely from the hollow sleeving part; the right additional rib is arranged in the upper keel right additional rib chase mortise; the upper keel right additional rib chase mortise is inserted and sleeved into a matched right additional rib groove in a board block; the left additional rib is inserted and sleeved into a matched left additional rib inserting groove in the board block; the main rib is sleeved with the hollow sleeving part; the hollow sleeving part is inserted and sleeved into a matched main rib inserting groove in the board block; an additional bar transverse clearance less than 1mm exists between the right additional rib and the upper keel right additional rib chase mortise; and a main rib transverse clearance less than 1mm exists between the hollow sleeving part and the main rib. According to the board, the board block can be effectively prevented from arch camber deformation, and visible contraction joint gaps on the surface of the board block can be smaller.

Description

Technical field: [0001] The invention relates to the technical field of decorative panels, in particular to a combined double keel decorative panel. Background technique: [0002] like figure 1 As shown, there is currently a floor on the market, its two adjacent wooden boards A1 are connected together through the yin and yang groove A13 and the keel A2, the keel A2 has the main reinforcement A21 and the auxiliary reinforcement A22, the main reinforcement A21 and the auxiliary reinforcement A22 are inserted into the In the matching main rib slot A11 and auxiliary rib slot A12 on the wooden board A1, its disadvantages are: 1. When the wooden board is wet and swollen, a large transverse stress will be generated between two adjacent wooden boards , this stress is likely to cause arching and deformation of the wooden board. 2. When the wood boards are cold-shrinked, it is easy to see a large shrinkage gap between two adjacent wood boards on the surface of the wood boards. Inv...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 As shown, there is currently a floor on the market, its two adjacent wooden boards A1 are connected together through the yin and yang groove A13 and the keel A2, the keel A2 has the main reinforcement A21 and the auxiliary reinforcement A22, the main reinforcement A21 and the auxiliary reinforcement A22 are inserted into the In the matching main rib slot A11 and auxiliary rib slot A12 on the wooden board A1, its disadvantages are: 1. When the wooden board is wet and swollen, a large transverse stress will be generated between two adjacent wooden boards , this stress is easy to cause the arching deformation of the wooden board

2. When the wood boards are cold-shrinked, it is easy to see a large shrinkage gap between two adjacent wood boards on the surface of the wood boards

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