| 摘要 |
PROBLEM TO BE SOLVED: To provide a collet for holding a screw shank in a hole so as to prevent the screw shank from being pushed out from the hole, after the screw shank is inserted into the adhesive injecting hole into which an adhesive is injected. SOLUTION: In mortar layer repairing work, the adhesive 14 is injected from the adhesive injecting hole 12 which is opened from a mortar layer M to a concrete skeleton K, so as to permeate a separation gap G of the mortar layer M, and the screw shank 10 for connecting the mortar layer M and the concrete skeleton K together is inserted into the hole 12. The collet 1 to be used for holding the screw shank 10 in the hole 12 comprises a mounting tube portion 2 which allows the screw fitting of the screw shank 10, the outside diameter of which is smaller than the inside diameter of the hole 12, and a collet body 3 integrally formed so as to increase its diameter gradually from one end of the tube portion 2 to make the outer diameter of the diameter-enlarged end portion side larger than the inner diameter of the hole 2. In a state in which the mounting tube portion 2 is screwed and fitted into the outer end of the screw shank 10 inserted into the adhesive injecting hole 12, the diameter of the collet body 3 is reduced on the inlet side of the hole 12, so that the collet body 3 can be brought into pressure contact with and fixed to an inner peripheral surface of the hole 12. COPYRIGHT: (C)2009,JPO&INPIT
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