Diameter expanding groove cutting device and expanding/contracting mechanism tool

Abstract

A diameter expanding groove cutting device capable of concurrently cutting a plurality of annular diameter expanding grooves in the inner peripheral wall of an anchor rough hole for anchor reinforcement implanting and an expanding / contracting mechanism tool used for it. The diameter expanding groove cutting device (11) comprises a body (12) having a shank (12a) coupled with a motorized apparatus, an intermediate expanding / contracting mechanism tool (13) provided along the axial direction and kept non-rotatable with respect to the body (12), and a tip-end-side expanding / contracting mechanism tool (14), the cutting device being free to expand or contract, with respective cutting blades (8), expanded and contracted in diameter by contracting and elongating actions, wherein, when rotation around the axis is imparted by the motorized apparatus, cutting blades (8), provided in respective expanding / contracting mechanism tools (13), (14) are used to be able to cut two annular diameter expanding grooves (3) in upper and lower two stages in the inner peripheral wall of the anchor rough hole (2) for anchor reinforcement implanting.

Description

Expansion groove cutting device and expansion mechanism tool technical field The invention relates to a diameter-expanding groove cutting device capable of cutting a plurality of ring-shaped diameter-expanding grooves on the inner peripheral wall of an anchoring bottom hole for embedding an anchor reinforcing bar and a tool for expanding and contracting mechanisms used therein. Background technique Now, an example of a conventional expanding diameter groove cutting device will be described with reference to FIGS. 15( a ) and ( b ) (for example, refer to Patent Document 1). The diameter-expanding groove cutting device 1 shown in the same figure can cut an annular diameter-expanding groove 3 on the inner peripheral wall of the anchor bottom hole 2 for embedding the anchor reinforcement rib. When using this diameter-expanding groove cutting device 1 to cut into an annular diameter-expanding groove 3 on the inner peripheral wall of the anchor bottom hole 2, at first, as shown...

AI Technical Summary

Problems solved by technology

However, cutting into the first and second annular diameter-expanding grooves 3 and 3 in this way has problems of labor and time.

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