Abstract: A method for judging a winding disorder of a rope onto a drum of a winch includes acquiring a captured image by a camera oriented to the drum, performing, on the basis of the captured image, a judgment on whether the winding disorder of the rope is present or absent and a determination of a disorder degree indicating the degree of the winding disorder, and outputting results of the judgment and the determination.

Abstract: An information acquisition system includes a first input acquisition unit that acquires masses of the attachment and the suspended cargo as first input, a second input acquisition unit that acquires information about a posture of the attachment as second input, a position estimation unit that estimates the position of at least one of the attachment and the suspended cargo, based on the first input and the second input, and an information derivation unit that derives information about the possibility of interference between the external object and at least one of the attachment and the suspended cargo, based on the position of at least one of the attachment and the suspended cargo estimated by the position estimation unit.

Abstract: In a work machine suspension device, each of a plurality of retention devices includes a support member that is supported by a first leg portion main body so as to be movable between an entry allowed position and a retention position. The entry allowed position is a position where the support member retracts from a second leg portion main body to allow a retained portion to enter between the first leg portion main body and the second leg portion main body, and the retention position is a position where the retained portion is retained on the support member while the support member is supported by the first leg portion main body and the second leg portion main body.

Abstract: In a working machine, a plurality of diagonal members includes a plurality of first diagonal members for connecting a first main member and a second main member with each other, the first diagonal members including a first nearest diagonal member located nearest to a first connector connected to an end of the first main member. A first reinforcement part extends from the first nearest diagonal member to the second main member or a second connector in a first specific direction for connecting the first nearest diagonal member and, the second main member or the second connector connected to an end of the second main member with each other.

Abstract: A crawler crane includes a lower traveling body, and the lower traveling body includes: a car body; a right crawler device and a left crawler device; a front side connecting portion; and a rear side connecting portion, the right crawler device includes a right crawler frame, the left crawler device includes a left crawler frame, the front side connecting portion is separably joined to each of a front end portion of the car body, the right crawler frame front portion and the left crawler frame front portion, the rear side connecting portion is separably joined to each of a rear end portion of the car body, the right crawler frame rear portion and the left crawler frame rear portion, and each of the front side connecting portion and the rear side connecting portion includes a lattice portion which has a lattice structure.

Abstract: A mobile crane includes: a lower traveling body including a pair of crawlers; an upper slewing body supported on the lower traveling body slewably about a slewing axis; a tiltable attachment including a boom tiltably supported on the upper slewing body; and a physical quantity detector. The lower traveling body has a reaction force receiving part for receiving a reaction force from the ground at a position away from the slewing axis in a boom direction in a state where the pair of crawlers are in contact with the ground, the boom direction coinciding with a horizontal component of a direction in which the boom extends from the upper slewing body, and the physical quantity detector detects a physical quantity which changes in accordance with a change in the reaction force received from the ground by the reaction force receiving part.

Abstract: A connecting device connects a first attachment and a second attachment constituting a working machine with each other. The connecting device includes a first connected member, a second connected member, and a connecting member (connecting pin 15). The first connected member extends outward from a first side surface of the first attachment, the first side surface extending in a longitudinal direction of the first attachment. The second connected member extends outward from a second side surface of the second attachment, the second side surface extending in a longitudinal direction of the second attachment, the second connected member facing the first connected member when the first attachment and the second attachment come into a connection state. The connecting member connects the first connected member and the second connected member with each other.

Abstract: A rope routing step and a raising step are executed. In the rope routing step, in a state where a raisable and lowerable member and a boom are laid down, a raising rope is coupled to the raisable and lowerable member and routed to extend rearward of the raisable and lowerable member. In the raising step, the raising rope is wound up rearward to raise the raisable and lowerable member. In the rope routing step, the raising rope is routed to pass between a lower restriction section and an upper restriction section of a rope support member, and in the raising step, the raising rope is wound up rearward with a vertical movement of the raising rope restricted by the upper restriction section and the lower restriction section.

Abstract: A crawler crane includes a lower traveling body, and the lower traveling body includes: a car body; a right crawler device and a left crawler device; a front side connecting portion; and a rear side connecting portion, the right crawler device includes a right crawler frame, the left crawler device includes a left crawler frame, the front side connecting portion is separably joined to each of a front end portion of the car body, the right crawler frame front portion and the left crawler frame front portion, the rear side connecting portion is separably joined to each of a rear end portion of the car body, the right crawler frame rear portion and the left crawler frame rear portion, and each of the front side connecting portion and the rear side connecting portion includes a lattice portion which has a lattice structure.

Abstract: Provided is a coupling unit capable of accurately determining a relative position between connectors despite welding across main pipes and connectors in a lattice structure. A coupling unit includes connectors to be joined to ends of main pipes, and a connector interconnection member that interconnects connectors to one another. Each of the connectors includes: a fitted part fittable to the end of the main pipe; a detachable connection part detachably connectable to a counterpart connector provided to an end of the other lattice structure; an outer peripheral surface weldable to an outer peripheral surface of the end of the main pipe while the fitted part is fitted to the end of the main pipe; and a connected part to which an end of the connector interconnection member is to be connected.

Abstract: A connecting device connects a first attachment and a second attachment constituting a working machine with each other. The connecting device includes a first connected member, a second connected member, and a connecting member (connecting pin 15). The first connected member extends outward from a first side surface of the first attachment, the first side surface extending in a longitudinal direction of the first attachment. The second connected member extends outward from a second side surface of the second attachment, the second side surface extending in a longitudinal direction of the second attachment, the second connected member facing the first connected member when the first attachment and the second attachment come into a connection state. The connecting member connects the first connected member and the second connected member with each other.

Abstract: A rope routing step and a raising step are executed. In the rope routing step, in a state where a raisable and lowerable member and a boom are laid down, a raising rope is coupled to the raisable and lowerable member and routed to extend rearward of the raisable and lowerable member. In the raising step, the raising rope is wound up rearward to raise the raisable and lowerable member. In the rope routing step, the raising rope is routed to pass between a lower restriction section and an upper restriction section of a rope support member, and in the raising step, the raising rope is wound up rearward with a vertical movement of the raising rope restricted by the upper restriction section and the lower restriction section.

Abstract: Provided is a crane which comprises a luffing jib including a lower jib and an upper jib coupled to the lower jib in such a manner as to be separable from the lower jib, the lower jib is attached to a head of a boom to have a laid-down posture at a position between the boom and a strut when the upper jib is separated from the lower jib, when the boom is lowered and laid down to allow the head of the boom to come into contact with a ground and when the strut is lowered and laid down to allow a distal end of the strut to come into contact with the ground, and the lower jib has a length which causes no interference with the strut when the lower jib has the laid-down posture at the position between the boom and the strut.

Abstract: Provided is a crane which comprises a luffing jib including a lower jib and an upper jib coupled to the lower jib in such a manner as to be separable from the lower jib, the lower jib is attached to a head of a boom to have a laid-down posture at a position between the boom and a strut when the upper jib is separated from the lower jib, when the boom is lowered and laid down to allow the head of the boom to come into contact with a ground and when the strut is lowered and laid down to allow a distal end of the strut to come into contact with the ground, and the lower jib has a length which causes no interference with the strut when the lower jib has the laid-down posture at the position between the boom and the strut.