| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a simple structure which can enhance friction force between woody materials. <P>SOLUTION: A friction surface K between both woody materials of a first fitting groove 5 and a friction attenuation component 7 is scribed with a frog or the like to form a grooved rough portion 10. Sand 11 which is harder than wood is sprayed on the roughened surface and fixed thereon with a fixation agent 12. Thus, the sand which is harder than the first fitting groove 5 and the friction attenuation component 7 engages wood grain of the first fitting groove 5 and the friction attenuation component 7 to form a locked state with friction resistance, so that the friction surface K between the first fitting groove 5 and the friction attenuation component 7 has an increased friction coefficient to provide a structure C to enhance friction force. <P>COPYRIGHT: (C)2012,JPO&INPIT |
