Wire guard for multi-stage boom bar for high-altitude work

摘要

The present invention relates to a wire harness for a high-end boom bar for a high-performance work. In the prior art, when a load is excessively applied to a pair of outgoing wires at the time of drawing, There is a problem that the operator or the heavy object is dropped because the boom bar that is drawn out is dumped.;3 to 6, a fixing bracket 50 having a plurality of coupling holes 52 is provided at the rear end of a boom frame 30 (32) having three or more stages, and the fixing bracket A fixing portion 54 integrally formed at one side of the fixing bracket 50 for fixing one lead wire 18a and a load for elastically fixing another lead wire 18b to the other side of the fixing bracket 50 And the load-attenuating part 62 includes a metal barrel 62 formed at one side of the front surface 56 of the fixing bracket 50 and a metal barrel 62 which is slidable in the metal barrel 62 A spring 66 for urging the sliding bar 64 in the metal barrel 62 and a spring 66 fixed to the head 67 of the sliding bar 64 to be connected to another drawing wire 18b So that even if one of the outgoing wires 18a is cut due to the excessive load, the other outgoing wires 18b can be separated from the other end of the spring 66 That it is protected by absorption, drawn wire and to prevent both the sharp drop of the multi-stage boom does not, by cutting, will also be effective to prevent the fall of the occupants and heavy.