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ANCHOR HOLE DIAMETER EXPANSION DEVICE, ANCHOR HOLE DIAMETER EXPANSION METHOD EMPLOYING THE DEVICE, AND EXPANSION ANCHOR FIXING STRUCTURE
ANCHOR HOLE DIAMETER EXPANSION DEVICE, ANCHOR HOLE DIAMETER EXPANSION METHOD EMPLOYING THE DEVICE, AND EXPANSION ANCHOR FIXING STRUCTURE
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机译：锚固孔直径扩展装置，安装该装置的锚固孔直径扩展方法以及扩展锚固结构
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摘要
PROBLEM TO BE SOLVED: To provide an anchor hole diameter expansion device capable of expanding a diameter of an anchor hole at any arbitrary position in a direction of extension, an anchor hole diameter expansion method employing the device, and an expansion anchor fixing structure.SOLUTION: The anchor hole diameter expansion device includes a main body formed from a rod material, and an expansion piece of a predetermined length to be used as a cutting blade for a base material to be punched. A recess extending in a length direction of the main body is formed in the vicinity of a distal end of the main body. A length direction of the expansion piece is disposed in the length direction of the main body, a proximal end side terminal portion disposed at an opposite side of the distal end of the main body is mounted in the main body and while defining the proximal end side terminal portion as a supporting point, the proximal end side terminal portion and a distal end side terminal portion at an opposite side are movable close to and separate from the main body. The distal end side terminal portion is accommodated in the recess in contact with the main body, and the distal end side terminal portion is energized by an elastic member away from the main body.
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