PROBLEM TO BE SOLVED: To provide a crane device in which an operation load can be made smaller as much as possible by left and right winding wire using a movable pulley even while the weight of the crane device itself is relatively light, and thereby the boom of the crane can be lifted/lowered and turned, and furthermore lifting objects such as fishing nets can easily be lifted/lowered and fixed.SOLUTION: A crane device is characterized by: connecting a proximal end of a boom 10 constituted so as to be displaced from right to left or up and down in a strut being set up to a base through a universal shaft mounting left and right first movable pulleys 11 and left and right second movable pulleys 12 in respective left and right of the middle part of the boom 10, respectively also, arranging left and right fixed pulleys 14 and left and right winches 15 in a predetermined position being the rear of movable pulleys extending left and right wire from left and right winches 15, respectively reaching a fixed pulley just as it is by being folded when reaching one movable pulley and here further being folded and extended and reaching any other movable pulley, further being folded and extended as it is, and then the left and right wire is wound around respective pulleys so that the wire termination may be fixed in a position separated in the lateral direction of the strut.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】クレーン装置自体の重さは比較的軽量でありながらも、動滑車を利用した左右巻取りワイヤによって操作荷重を可及的に小さくしてクレーンのブームを昇降及び旋回操作をすることができ、しかも漁網等の引き揚げ対象物を容易に昇降定置可能としたクレーン装置を提供する。【解決手段】基台に立設した支柱に自在軸を介して上下左右に変位可能に構成したブーム10の基端部を連結し、ブーム10の中途部の各左右にそれぞれ左右第1動滑車11と左右第2動滑車12とを取付けると共に、動滑車の後方となる所定位置には左右定滑車14と左右ウインチ15とを配設し、左右ウインチ15から左右ワイヤをそれぞれ伸延し、一方の動滑車に至ると折返してそのまま定滑車に至りここで更に折返して伸延し、いずれか他方の動滑車に至って更に折返してそのまま伸延してワイヤ終端が支柱の左右方向に離隔した位置に固定するように左右ワイヤを各滑車に掛け回すこととした。【選択図】図1
