US 12,168,595 B2
Weight
Akira Koyahata, Hyogo (JP); Dairo Matsui, Hyogo (JP); and Takanobu Yamagami, Hyogo (JP)
Assigned to KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima (JP)
Appl. No. 17/996,434
Filed by KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima (JP)
PCT Filed Apr. 22, 2021, PCT No. PCT/JP2021/016378
§ 371(c)(1), (2) Date Oct. 18, 2022,
PCT Pub. No. WO2021/220944, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 2020-078386 (JP), filed on Apr. 27, 2020; and application No. 2021-031158 (JP), filed on Feb. 26, 2021.
Prior Publication US 2023/0219793 A1, Jul. 13, 2023
Int. Cl. B66C 23/90 (2006.01)
CPC B66C 23/90 (2013.01) 19 Claims
OG exemplary drawing
 
1. A weight disposed around a suspended-load rope suspended from a derricking member of a construction machine to detect over-winding of the suspended-load rope, the weight comprising
a weight body to be suspended from the derricking member through at least one string-like part, the weight body having a cylindrical shape capable of enclosing the suspended-load rope, wherein:
the weight body is formed with a rope insertion space partially with respect to a circumference direction, the rope insertion space passing through the weight body in a radius direction of the weight body to allow the suspended-load rope to be inserted through the rope insertion space in the radius direction;
the rope insertion space has a shape cutting through the weight body from one end of the weight body to the other end on an opposite side to the one end in an axis direction that is parallel to a center axis of the weight body;
the rope insertion space includes at least one oblique slit part oblique to the center axis so as to prevent the suspended-load rope from passing through the oblique slit part in a state where the center axis and the suspended-load rope are parallel to each other; and
the at least one oblique slit part includes an oblique slit part having a width decreasing inward from an outside in the radius direction of the weight body.