Patent ID: 8028747

Claim:
A tube spacer formed by bending a wire rod for forming clearances between a plurality of tubes, comprising: a plurality of projections formed from a plurality of portions of the wire rod and used for insertion between the tubes; and a base-bending portion formed from the other portion of the wire rod; wherein X, Y and Z directions are perpendicular to each other, the X direction being a direction into which the projections are inserted between the tubes, the Y direction being a direction into which the tubes extend, and the Z direction being a direction into which the tubes are aligned; wherein each of the projections comprises a pair of extending portions and a front-bending portion, the paired extending portions are spaced from each other in the Y direction and extend in the X direction, and the front-bending portion connects both front ends of the pair of extending portions; and wherein the base-bending portion connects both rear ends of the projections so that the projections are arranged at interval in the Z direction.