Abstract: First guide pipes are disposed on both sides of blasting areas, and second guide pipes are disposed on both sides of the blasting area. A wire rod W is inserted through the first guide pipes and the second guide pipes, penetrating in a conveying direction of the wire rod W. The diameter of each of first insertion holes of the first guide pipes and second insertion holes of the second guide pipes is gradually reduced toward the downstream side in the conveying direction. The second guide pipe is installed in a state in which the downstream-side end portion in the conveying direction is inserted into the first insertion hole from the inlet side of the first guide pipe.

Abstract: First guide pipes are disposed on both sides of blasting areas, and second guide pipes are disposed on both sides of the blasting area. A wire rod W is inserted through the first guide pipes and the second guide pipes, penetrating in a conveying direction of the wire rod W. The diameter of each of first insertion holes of the first guide pipes and second insertion holes of the second guide pipes is gradually reduced toward the downstream side in the conveying direction. The second guide pipe is installed in a state in which the downstream-side end portion in the conveying direction is inserted into the first insertion hole from the inlet side of the first guide pipe.

Abstract: A supporting mechanism is provided that prevents swings and deflections of a long piece of material, as well as eliminates any scratches of it that may arise when it is being processed. The supporting mechanism includes a group of spherical bodies C, four pieces of movable supporting members 1, and coil springs 2. The group of spherical bodies C comprises a first group of spherical bodies C1. The movable supporting members 1 are provided around the second group of spherical bodies C2, contacting the periphery of the group. The coil springs 2 are a biasing device that pushes the movable supporting members 1 toward the central axis of the long piece of material W.

Abstract: A supporting mechanism is provided. It can prevent swings and deflections of a long piece of material, as well as eliminate any scratches of it that may arise when it is being processed. The supporting mechanism comprises a group of spherical bodies C, four pieces of movable supporting members 1, and coil springs 2. The group of spherical bodies C comprises a first group of spherical bodies C1. The movable supporting members 1 are provided around the second group of spherical bodies C2, contacting the periphery of the group. The coil springs 2 are biasing means that push the movable supporting members 1 toward the central axis of the long piece of material W.