Method for fixing a taper implant to a receiving member

The present invention relates to a taper implant, a screw-fastening structure using a taper implant with female threads, a forming drill for drilling an insertion hole for the taper implant, and a hammer for driving the taper implant. A method of fixing a taper implant to a receiving member includes providing a taper implant having a frusto-conical outer surface, a projecting portion connected to a larger diameter end and a smaller diameter end. A receiving member is provided which has a wall portion with a passing-through hole therein with at least a portion of the passing-through hole being tapered to form a frusto-conical shape whereby the taper portion has a larger diameter end and a smaller diameter end and the passing through hole has a cylindrical counterbored portion adjacent to the larger diameter end in which the projecting portion of the taper implant is received. A taper rate of the taper portion of the passing through hole is the same as a taper rate of the taper portion of the taper implant. The larger diameter end of the taper portion of the passing through hole has a diameter which is smaller than a diameter of the larger end of the taper portion of the taper implant whereby there is a tight-fit allowance when the taper implant is inserted into the passing through hole. The taper implant is fixed in the passing through hole of the receiving member by the outer surface of the taper portion of the taper implant being in contact with a surface of the taper portion of the passing through hole by applying a force to the taper implant whereby a friction force is generated between the taper portion of the taper implant and the wall portion.