Vibration shaft for concrete internal vibrator

摘要

PROBLEM TO BE SOLVED: To provide vibration shaft for concrete internal vibrator which makes eccentric vibration axis without cutting process and is less likely to generate deflection even when it is mounted inside vibrating body and rotated at high speed.;SOLUTION: The present invention relates to a vibration shaft 1 for a concrete internal vibrator which is rotatably axially stopped inside the vibrating body of a concrete internal vibrator having a rod-shaped vibrating body and generates vibrations in the vibrating body by rotation, and a rotary shaft 3 is provided at both ends in the longitudinal direction of a bar-like member 2 formed in a substantially fan-shaped section by drawing or extrusion, and in the substantially fan-shaped cross section, the angle θ between the two sides is less than 180 degrees, an arc centered on a point O on a straight line equally dividing the angle θ formed by these two sides forms an outer arc L, and the rotary shaft 3 is configured as a vibration shaft 1 for a concrete vibrator having the center O of the arc as its axis.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT