Provided is a guide display device with which it is possible to track a hung load and display guide information. Also provided is a crane including such a guide display device. A guide display device of a crane including a data processing unit that creates a plurality of surfaces using point cloud data, which is acquired by a laser scanner from above a hung load and which includes the hung load, and creates a three-dimensional map according to the plurality of surfaces, the three-dimensional map being created for each prescribed period, wherein the data processing unit is configured to set a reference position at the hung load in the three-dimensional map and also set a current surface present within a prescribed distance from a past reference position as the surface of the hung load, thereby tracking the hung load in the three-dimensional map.

A portable winch and method of use is shown. One advantage of winches shown includes an ability to lower a boom or boom sections into limited access exit pit for winching operations such as pipe bursting. Sectional boom designs shown provide the ability to easily raise and lower a boom large distances without the need for a single long boom. Selected winch designs shown include flexible inserts between the boom and the winch frame that help resist damage from unforeseen shifting of the device during operation. Designs and methods shown also include multiple pulleys on a boom end unit. Fasteners are shown that reduce build up of debris.

A portable winch and method of use is shown. One advantage of winches shown includes an ability to lower a boom or boom sections into limited access exit pit for winching operations such as pipe bursting. Sectional boom designs shown provide the ability to easily raise and lower a boom large distances without the need for a single long boom. Selected winch designs shown include flexible inserts between the boom and the winch frame that help resist damage from unforeseen shifting of the device during operation. Designs and methods shown also include multiple pulleys on a boom end unit. Fasteners are shown that reduce build up of debris.

A guide display unit for a crane, wherein a data processing unit: calculates a measurement area corresponding to the measurement area of a camera; the measurement area from the viewpoint of the camera and generates a first image; performs mosaic-processing on the image captured by the camera according to the particle size of the three-dimensional map and generates a second image; performs registration processing on the first image and the second image and calculates the amount of deviation between the first image and the second image; corrects the position of a guide frame figure with respect to the image of a suspended load and a feature on the basis of the calculated amount of deviation; and overlays the guide frame figure on the images of the suspended load and the feature and displays the result on the data display unit.

A method for handling of an offshore wind turbine component includes using a vessel having a hull on which a motion compensating crane is mounted. The crane includes a main boom; a main boom luffing assembly; a mobile hoist cable suspension member; and a hoist winch and a hoist cable driven by the hoist winch. An object suspension device is suspended from the hoist cable. The mobile hoist cable suspension member is supported by a motion compensating support device that is fitted to the tip end of the main boom, the motion compensating support device including one or more motor powered motion displacement actuator assemblies and a motion compensating support device controller. The method includes connecting the offshore wind turbine component to the object suspension device; and operating the motion compensating support device to provide motion compensation in at least one direction of the object suspension device and the connected offshore wind turbine component. The crane is provided with one or more nacelle position detectors that are configured and operated to sense at least one of actual position and actual motion of the nacelle or of one or more components in or on the nacelle, and the one or more nacelle position detectors are linked to the motion compensating support device controller.

A method for handling of an offshore wind turbine component includes using a vessel having a hull on which a motion compensating crane is mounted. The crane includes a main boom; a main boom luffing assembly; a mobile hoist cable suspension member; and a hoist winch and a hoist cable driven by the hoist winch. An object suspension device is suspended from the hoist cable. The mobile hoist cable suspension member is supported by a motion compensating support device that is fitted to the tip end of the main boom, the motion compensating support device including one or more motor powered motion displacement actuator assemblies and a motion compensating support device controller. The method includes connecting the offshore wind turbine component to the object suspension device; and operating the motion compensating support device to provide motion compensation in at least one direction of the object suspension device and the connected offshore wind turbine component. The crane is provided with one or more nacelle position detectors that are configured and operated to sense at least one of actual position and actual motion of the nacelle or of one or more components in or on the nacelle, and the one or more nacelle position detectors are linked to the motion compensating support device controller.

Provided is an auxiliary sheave device with a simple and lightweight structure and a crane including the same. The auxiliary sheave device, provided in the crane including a derrick member guy line, includes an auxiliary sheave frame and an auxiliary sheave guy line supporting the auxiliary sheave. The derrick member guy line is connected to the distal end portion of the derrick member. The auxiliary sheave frame is attached to the distal end portion of the derrick member so as to be capable of making rotational movement and taking a projecting posture of projecting in the distal end direction from the distal end portion of the derrick member. The auxiliary sheave guy line is connected to the distal end portion of the auxiliary sheave frame and a guy line connection portion of the derrick member so as to keep the auxiliary sheave frame in the projecting posture.

Provided is an auxiliary sheave device with a simple and lightweight structure and a crane including the same. The auxiliary sheave device, provided in the crane including a derrick member guy line, includes an auxiliary sheave frame and an auxiliary sheave guy line supporting the auxiliary sheave. The derrick member guy line is connected to the distal end portion of the derrick member. The auxiliary sheave frame is attached to the distal end portion of the derrick member so as to be capable of making rotational movement and taking a projecting posture of projecting in the distal end direction from the distal end portion of the derrick member. The auxiliary sheave guy line is connected to the distal end portion of the auxiliary sheave frame and a guy line connection portion of the derrick member so as to keep the auxiliary sheave frame in the projecting posture.

Provided is a guide display device that prevents misidentification of the same feature as a plurality of different features or the ground surface even if an occlusion area occurs. A guide display device for a crane includes: a laser scanner that scans a suspended load and a ground surface from above the suspended load; and a data processing unit that calculates a representative point for each grid using the point cloud data acquired by the laser scanner, creates a three-dimensional map based on the representative points, and updates the three-dimensional map if the newly calculated representative point differs from the existing representative point. When an occlusion area, which is a shadow of the suspended load, occurs in the three-dimensional map, the occlusion area is not updated even if the newly calculated representative point and the existing representative point are different.

The invention relates to an apparatus for weighing the hook load of a crane, wherein different measurement accuracies can be set at the apparatus, comprising at least one measurement device, at least one retaining pin, and at least one coupling section. The invention is additionally directed to a hook block and to a crane having a corresponding apparatus.