Patent ID: 8240678
Filing Date: 2012-08-14
Classification: B21D,F16B,F16J,Y10T

Abstract:
1. A connecting structure comprising: two or more metal plates laminated together; a connection portion of the two or more laminated plates; a first bend line; a tongue piece portion formed by cutting concurrently the laminated metal plates in a thickness direction in a tongue-like shape from the connection portion, wherein the tongue piece portion comprises a body portion bent at an angle in an out-of-plane direction from the connection portion at the first bend line, and wherein a length of the first bend line is smaller in length than a maximal width of the tongue piece portion measured parallel to the first bend line; and a bend depth of the tongue piece portion in the out-of-plane direction that is equal to or greater than a total thickness of the laminated metal plates, wherein the body portion of the tongue piece portion comprises a second bend line, an inclined portion between the first and second bend lines, and a front end of the tongue piece portion extending from the second bend line and bent parallel to a tongue piece opening formed in the laminated metal plates by the cutting, wherein the first bend line, the inclined portion, and the second bend line provide a stepped difference, and wherein the tongue piece portion is bent downward of the laminated metal plates to be in a state of being pulled in on the connection portion side, and the front end of the tongue piece portion does not overlap the laminated metal plates.