| 摘要 |
PURPOSE: An assembling method for a ladder is provided to insert one end of beam in the rotation frame of hinge and then bind without special fastening member, so that the number of component is reduced, and the step of assembling is simplified. CONSTITUTION: An assembling method for a ladder comprises the steps of; manufacturing a hinge(10A) so that numerous slits(13) pass through the edge of a rotation frame(11A); manufacturing a beam(20A) of which the inside of one end has the same or larger than the outside of the rotation frame(11A); binding by inserting one end of the beam(20A) in the rotation frame(11A) of the hinge(10A); and pressing the beam(20A) by press and die which has the same internal form with the external form of the rotation frame(11A) so that part of a beam's edge is compressed in the rotation frame(11A) to be bound.
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