Patent ID: 7771137

Claim:
A connecting structure comprising: a hollow or half hollow member, the hollow or half hollow member having a plurality of sides including two side portions opposed apart to each other and a linking portion linking the two side portions; a collar including two contact surfaces at both ends of the collar, the two contact surfaces respectively abutting the two side portions between the two side portions of the hollow or half hollow member, at least one of the two contact surfaces being formed with a receiving portion therein; the collar including a bolt-hole that passes through the two contact surfaces and a rotation prevention portion, the collar being disposed between the two side portions of the hollow or half hollow member; the hollow or half hollow member including a deformed portion formed in at least one of the two side portions that joins the collar with the hollow or half hollow member, the deformed portion extending into the receiving portion; an another member including a hole; a bolt that passes through a hole in each of the two side portions, the bolt-hole of the collar, and the hole of the another member so as to connect a portion of the hollow or half hollow member within the another member; and the rotation prevention portion of the collar configured to make contact with the linking portion so as not to allow the collar to rotate about the deformed portion beyond a constant tolerance before the collar is fastened by the bolt.