Lifting device of the foundation work for construction machine

摘要

PURPOSE:To facilitate the diassembly and assembly operation and improve the durability by engaging a rack gear of a rack plate provided at a leader with a pinion provided at an elevating member and driving the pinion to move the elevating member up and down. CONSTITUTION:A rack plate 7 having rack gears 7a engraved on its both surface is located in vertical direction at a leader 3 stood on the front part of a base machine. A pair of pinion which pinches the rack plate 7 so as to engage with each rack gear 7a is facingly provided at an elevating member 9 for elevating a working device such as an auger or a hammer. When the pinion is driven by a driving device 15, the pinion is engaged with the rack gear 7a under the condition of pinching the rack plate 7 and moves up and down along the leader 3, rotating, so as to elevate the working device through the elevating member 9.