| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a shank of a fixing self-tapping screw of a screwing-type wooden construction joint metal from tearing the joint metal when a building material to be fixed is distorted in the shear direction of the self-tapping screw. <P>SOLUTION: A peripheral portion of a fixing screw inserting hole of a screwing-type wooden construction joint metal is protruded in a phased manner to the side of a building material to be fixed, and an area of contact between a fixing screw and the joint metal is increased. This prevents the joint metal from being broken because a great concentrated load is generated on a portion in which the fixing screw and the joint metal are brought into contact with each other. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
