Tenon and mortise combined structure of wood product

Abstract

A tenon and mortise combined structure of a wood product comprises a tenon and a mortise, wherein the inner end surface and the outer end surface of the mortise of the wood product are square rift grain surfaces; a rift grain edge of the square rift grain surface on the inner end surface of the mortise is larger than a rift grain edge of the square rift grain surface on the outer end surface of the mortise; the lengths of cross grain edges of the square rift grain surfaces on the inner end surface and the outer end surface of the mortise are equal; an opening is formed in the tenon installed in the mortise from inside to outside; a buffer hole in parallel connection with the opening is formed at the outer end of the tenon; an expansion sheet is installed inside the opening; the expansion sheet consists of two oppositely closed trapezoidal sheets; an inner circular hole is formed on each trapezoidal sheet of the expansion sheet; the two inner circular holes are opposite to each other; a pressure spring is installed inside the inner circular holes; the expansion sheet is an integral metal elastic sheet; and a junction surface of the expansion sheet and the opening of the tenon is toothed. The tenon and mortise combined structure of the wood product can avoid damage to conventional furniture due to loose of the tenon and the mortise under the condition of wetness and dryness change, so that the service life of the furniture is prolonged.

Description

technical field [0001] The invention relates to a mortise combination structure of a wooden product, which is a connection structure for preventing the mortise of the wooden product from being easily loosened during use. Background technique [0002] The planks and squares processed from logs can be divided into along-grain and transverse-grain from the direction of log annual ring grain. In the direction of the transverse line in the grain direction, the dry shrinkage and temperature expansion coefficient of wood along the grain is very small at 0.01-0.06%, while the dry shrinkage and wet expansion coefficient of wood across the grain is very large at 0.6-1.1%. At present, most of the frame structures of pure solid wood furniture, especially high-end solid wood furniture, adopt the traditional mortise and tenon combination structure. Whether it is handmade or machined, the combination of mortise and eye gluing and eye gluing is combined to form after the glue is dried. Thi...

AI Technical Summary

Problems solved by technology

For example, the furniture in the south is easy to be glued and loosened when it is brought to the north. The reason is that the indoor air humidity in the north and the south is different, and the north is too dry. Due to the difference in wood shrinkage and wet expansion coefficients, the glued furniture at the mortise joint is damaged.

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