Kobelco Construction Machinery Co., Ltd.

Shingo Kurihara

Hiroyuki Otsuka

Kazuyuki Miyazaki

Daisuke Takaoka

Tetsuya Kobatake

Shoji Watanabe

Takao Eto

Takahiro Oka

Koji Nishijima

An upper spreader guide device includes a pair of left and right boom-side guide parts each supported by a boom so as to be arranged in a raised attitude of rising diagonally upward from the boom in a state where the boom is arranged in a lowered attitude, and a pair of left and right movable guide parts supported by the pair of boom-side guide parts, respectively, such that a relative position with respect to the pair of boom-side guide parts is changeable between a protruding position and a retraction position.

Upper spreader guide device

A first width direction bending portion bendably connects a portion of a guy link on a distal end side with respect to a first link portion to the first link portion in a width direction. When the guy link is in a stored state, the portion of the guy link located on the distal end side with respect to the first width direction bending portion is disposed outside the first link portion in the width direction. When the guy link is in a stored state, at least a portion of the guy link is disposed on the outer side in the width direction than a front strut and on a back surface or a side surface of a lower jib.

Rising and falling body of work machine and method for storing rising and falling body of work machine

Provided is a construction machine capable of suppressing deformation of a boom in a simple configuration and at low costs. The construction machine includes a pair of backstops having respective hydraulic cylinders; a supply device which supplies the hydraulic cylinders with hydraulic fluid; a deformation sensing device which senses deformation of the boom; and a control device which controls the supply device so as to make a thrust of the hydraulic cylinder of one backstop having a larger pressing force, out of the pair of backstops, be larger than a thrust of the hydraulic cylinder of the other backstop, the pressing force being applied due to the deformation of the boom.

Construction machine equipped with boom

A crane includes a boom and a derricking mechanism, wherein: the derricking mechanism includes a linking device connecting one end of a guy line to a distal end of the boom; the linking device includes a joint connected to one end of the guy line, and a support device provided on the distal end to support the joint so as to locate the joint at a position away from the back surface and opposite to the ventral surface; and the support device includes a holding member which holds the joint, the holding member allowing the position of the joint to be selectively changed to a plurality of different positions in a first direction perpendicularly intersecting an axis of the boom and a rotary axis of the boom.

Growing community of inventors

Hyogo, Japan

Shingo Kurihara