| 摘要 |
<p>A method and apparatus for insertion of rods into wood or wood-like bodies. A rod preferably made of metal and partially or completely threaded, is introduced into a body that is preferably wooden and previously drilled, applying a rotary motion at one end of the said rod by appropriate means, the rod and the wooden body being thus intimately joined through the effect of self-threading. When one or several rods go through a number of wooden elements, a very effective union is obtained between the elements. Through this means the mechanical resistance of a piece can be increased and units can be produced through the accumulation of elements joined by this method. The units can be articulated.</p> |
