3305results about "Cranes" patented technology

A handling truck comprises a mast assembly, a base, a moving assembly, and a connecting member. The base is fixedly disposed at the bottom end of the mast assembly, and the base is provided with a socket portion. The moving assembly includes a leg assembly and a connecting portion, wherein one end of the connecting portion is connected to the leg assembly, and the other end of the connecting portion is configured for socket engagement with the socket portion. The moving assembly is configured to drive the mast assembly to move on a plane. The connecting member is configured to pass through the socket portion and the connecting portion to achieve a detachable connection between the moving assembly and the base. The present application provides a handling truck capable of reducing packaging costs and transportation costs.

The invention relates to the technical field of intelligent control of engineering machinery, and provides a tower crane hoisting whole process dynamic mapping and sensing coverage method and system. The method comprises the following steps: respectively mounting two rotary radars on a rotatable bracket of the tower crane; the current hoisting operation stage of the tower crane is obtained in real time; switching a shooting view angle of the double-radar module according to the hoisting operation stage, and controlling the double-radar module to obtain continuous point cloud data of the corresponding operation stage; tower crane operation parameters are collected, and continuous lifting hook tracks are generated in combination with continuous point cloud data obtained by the double-radar module; identifying a dynamic obstacle and a static background contained in the target monitoring space from the continuous point cloud data, and constructing a construction environment point cloud model; performing space-time registration on the construction environment point cloud model and the physical coordinate system, and establishing a global dynamic map; and a dynamic sensing area coverage map is constructed by fusing the continuous lifting hook track and the global dynamic map, so that the real-time sensing of the space environment of the tower crane hoisting operation is realized.

The invention relates to the technical field of tower crane control, and provides an aerial high-risk area identification and hoisting path reconstruction method and system. The method comprises the following steps of: respectively mounting two rotary radars on a rotatable bracket of the tower crane to form a radar sensing module comprising a double-radar module; dynamically scanning the potential risk area in the construction scene through a radar sensing module to obtain real-time position information of the potential risk area; receiving the real-time position information through a processing module, and converting the real-time position information into real-time three-dimensional coordinate data in a motion coordinate system of the hoisting equipment by adopting a three-dimensional coordinate conversion algorithm; constructing a three-dimensional model of the potential risk area based on the real-time three-dimensional coordinate data; and identifying the three-dimensional model to determine a high-risk area, adopting an improved fast exploration random tree algorithm as a path obstacle avoidance algorithm, combining the three-dimensional model to dynamically reconstruct an initial hoisting path set by a user, and generating an optimal risk-avoiding hoisting track avoiding the high-risk area.

The invention belongs to the technical field of underwater operation, and relates to a maintenance device for a lower hinged support of a dock gate and a construction method thereof. The device comprises a waterproof cover box, a diving barge, a hoisting system and a drainage assembly, the waterproof cover box comprises a cover body and a channel well, openings are formed in the bottom and the top of the cover body, the bottom face of the cover body is in sealed compression joint with the surrounding structure of the lower hinged support to be maintained, the channel well is connected to the opening in the top of the cover body in a sealed mode, and the top face of the channel well is higher than the water surface. The diving barge is provided with a plurality of hydraulic supporting legs capable of ascending and descending so that the diving barge can be supported in the horizontal door pit. The hoisting system comprises a tower frame and an arm frame which are arranged on the diving barge, and one end of the arm frame is located above the cover body and connected with the cover body in a pressing mode; the drainage assembly comprises a submersible pump and a drainage pipe, the submersible pump is arranged in the cover body, one end of the drainage pipe is connected with the submersible pump, and the other end is led to the water surface through the channel well. According to the method, a stable dry operation environment can be rapidly constructed at the dock gate lower hinged support to be maintained, rapid maintenance is achieved, pollution to a sea area is avoided, and operation safety is improved.

A crane assembly for erecting a tower from a plurality of tower sections includes a first telescopic mast connected to a second telescopic mast. A crane is mounted on top of the first telescopic mast. The first telescopic mast is configured to increase in length from a retracted state in a first direction and includes a first clamp assembly that selectively grips portions of the tower. The second telescopic mast is configured to increase in length from a retracted state in a second direction opposite to the first direction and includes a second clamp assembly that selectively grips portions of the tower.

The invention relates to the technical field of artificial intelligence, and provides a tower crane multi-dimensional data dynamic analysis and visualization method and system and terminal equipment. The method comprises the following steps: acquiring multi-dimensional monitoring data of the tower crane; establishing a synchronous monitoring model of the tower crane by adopting a digital twin technology based on the multi-dimensional monitoring data, and synchronously displaying the synchronous monitoring model in a user interface; based on a viewing instruction of a user to the synchronous monitoring model, matching a target display dimension for the user, synchronously setting a folding dimension which is not matched with the viewing instruction, and hiding model display information corresponding to the folding dimension in the synchronous monitoring model; calling a preset analysis model matched with the target display dimension, extracting target monitoring information from the synchronous monitoring model, and performing tower crane dynamic analysis on the target monitoring information through the preset analysis model; and updating the dynamic analysis result of the tower crane into the synchronous monitoring model to update model display information matched with the target display dimension in the synchronous monitoring model, thereby improving the operation and maintenance decision efficiency and accuracy.

The invention discloses a pipe grabbing system for building water well vertical pipe construction, and relates to the technical field of building mechanical and electrical installation, the pipe grabbing system comprises a pipe grabbing mechanism, a rotating disc, a lifting rod, a base, a visual module and a controller; the controller is configured to acquire image data fed back by the visual module if pipe grabbing demand information initiated by a user is received, and perform pipeline identification based on the image data to obtain pipe diameter data of a pipeline; a pipe grabbing control quantity is generated based on the pipe diameter data, a pipe grabbing control instruction is sent to a pipe grabbing mechanism according to the pipe grabbing control quantity, a rotating mechanism is controlled to lift the pipeline away from the ground, and a rotating disc is controlled to rotate; and calling the image data, determining a pipeline mounting position, generating a pipeline height movement amount and a pipeline positioning movement amount, sending a pipeline height control instruction to the lifting rod according to the pipeline height movement amount, and sending a pipeline positioning control instruction to the rotating mechanism according to the pipeline positioning movement amount. The construction method has the effect of improving the construction efficiency.

The invention discloses an extended-range hybrid power system and a control method therefor, and a crane, and belongs to the technical field of construction machinery. The extended-range hybrid power system comprises a power battery, an all-in-one controller, a first motor, a second motor and an engine, wherein the first motor is connected to a lower traveling mechanism; the engine is connected to the second motor, and the second motor is connected to an upper operating mechanism; the power battery, the first motor and the second motor are connected to the all-in-one motor, and the all-in-one motor is connected to an external power supply.

The present invention pertains to a wear pad for a telescopic boom of a work machine, comprising a base part configured to be fixedly mounted to the telescopic boom, and a top layer part configured to provide a wear-resistant, low friction sliding surface. The top layer part is configured to be releasably mounted to the base part. The invention further pertains to a telescopic boom assembly for a work machine, comprising a first boom segment having at least one first wear pad assembly mounted to a free end of the first boom segment, and a second boom segment having at least one second wear pad assembly mounted to a sliding end of the second boom segment, wherein at least one of the wear pad assemblies comprise a wear pad having a base part and a top layer part configured to provide a wear-resistant, low friction sliding surface. The top layer part is configured to be releasably mounted to the base part. Further, the present invention pertains to a work machine comprising such telescopic boom assembly.

The invention relates to the technical field of port machinery loading and unloading, and provides a ship-shore linkage loading and unloading method and system suitable for a mast crane. The method comprises the steps that position data, course data and attitude data of a ship are obtained in real time through ship navigation equipment, and tide height data and tide flow velocity data of the sea surface are obtained in real time through tide monitoring equipment; inputting the obtained ship position data, course data, attitude data, tidal height data and tidal flow velocity data into a control system of the mast crane; the control system generates a corresponding control instruction according to the calculated dynamic compensation parameter, and sends the control instruction to a variable amplitude control system of the mast crane; the hoisting path and the hoisting posture of the mast crane are adjusted in real time through the variable amplitude control system according to the control instruction, so that the hoisting point is kept vertical and the stress is balanced in the equipment lowering process; in the whole hoisting operation process, the operation process is monitored in real time through monitoring equipment arranged on the mast crane and the ship.

The utility model provides an active dynamic balancing device based on a tower crane. The active dynamic balancing device comprises a tower body, a working arm and a balancing arm, wherein the working arm and the balancing arm are fixedly mounted on two sides of the top of the tower body respectively; a water storage tank and a balance water tank are fixedly mounted on the balance arm, and the bottom of the water storage tank is communicated with the balance water tank through a connecting pipeline; and a control valve group for controlling water distribution between the water storage tank and the balance water tank is arranged on the connecting pipeline. According to the utility model, the balance weight of the balance arm is designed into the capacity-adjustable water tank, the working moment is balanced by utilizing the moment generated by the dead weight of the water body, the volume of the balanced water body is adjusted in real time according to requirements, so that the moment is changed, and the quantity of the water body distributed in the water storage tank and the balanced water tank is adjusted in real time according to the working moment. And the balance moment is synchronously equal to the working moment in real time.

The invention relates to the technical field of emergency rescue, in particular to a movable emergency rescue conveyor which comprises a conveying truck, a hoisting machine is fixedly connected to the top of the conveying truck, a conveyor angle control seat is fixedly connected to the rear side of the top of the conveying truck, and a rescue conveyor is arranged on the front side of the conveyor angle control seat. According to the movable emergency rescue conveyor, by arranging the conveying truck, the hoisting machine, the conveyor angle control base and the rescue conveyor, rapid unfolding and flexible adjustment of the movable emergency rescue conveyor on a rescue site are achieved, and the movable emergency rescue conveyor can be accurately controlled through an electric push rod within a short time; lifting of the conveyor body and height difference adjustment among the conveyors are achieved, so that the material conveying requirements in different rescue scenes are met, meanwhile, the structural strength and stability of the conveyor in the unfolded state are ensured through the unique supporting structure design, and reliable guarantee is provided for rescue actions.

The invention relates to the technical field of engineering machinery control, and provides a mast crane wind load posture self-stabilizing method and system for high wind area operation. The method comprises the following steps: acquiring wind speed data of a current environment in real time through a wind speed sensor arranged at the top end of a main arm of the mast crane, and acquiring current arm angle data of the main arm of the mast crane in real time through an arm angle detector; a control instruction is sent to an execution mechanism of the mast crane, so that the mast crane executes an operation deceleration action, a lifting braking action or a posture fine adjustment action; in the process of executing the control instruction, historical wind load data and rigidity model parameters of the mast crane boom frame are obtained, and predictive analysis is conducted on the current wind load stress state of the mast crane; and according to a predictive analysis result, parameters of the control instruction are adjusted so as to dynamically correct the operation deceleration amplitude, the lifting braking force or the posture fine adjustment angle of the mast crane.

The present invention relates to a six-point truss-type sand pumping and lifting device for a mattress laying vessel. The device comprises a support assembly and six working assemblies. The six working assemblies are all slidably connected to the support assembly. Each working assembly comprises a moving assembly, a sand pumping assembly, and a lifting assembly. The sand pumping assembly and the lifting assembly are both connected to the moving assembly, and thus move and work by means of the moving assembly. The support assembly comprises two main beams. Two ends of each main beam are respectively connected to one main frame support leg. Two auxiliary beams are connected between every left and right main frame support legs. The moving assembly is slidably connected to the two main beams. Each auxiliary beam is connected to a hydraulic pump station, a frequency converter cabinet, and a cab. The present invention minimizes the labor intensity of operators and labor costs, and can effectively improve medium precision control, safety performance, and construction efficiency in the construction process.

The invention relates to the technical field of intelligent control of cranes, and discloses a tower top self-climbing intelligent crane and a climbing method thereof. The method comprises the following steps: firstly, constructing a digital twin model in the climbing process of the crane, and synchronizing real-time operation data acquired by a sensor; fusing the multi-dimensional features to generate a spatial-temporal feature matrix containing position, load, wind speed and vibration information; inputting the risk feature vector into a probabilistic modeling module, and outputting a risk feature vector with confidence; constructing a three-dimensional risk concentration distribution field in combination with crane structure information, and predicting a risk propagation path and a diffusion trend based on graph topology; and finally, constructing a self-adaptive early warning threshold generation model, generating multi-level early warning thresholds changing along with the climbing state, and realizing a climbing control decision through comparison between real-time risk characteristics and the thresholds. According to the method, comprehensive perception, accurate risk assessment and dynamic control of the climbing process of the crane are realized, and the safety and stability of the climbing process are improved.

Systems and methods are provided for assembling and installing multiple wind turbines from a single vessel. In general, different embodiments use wind turbine components on the vessel including blades, a nacelle assembly with a rotating hub, and a tower. A Turbine Installation Gantry System (TIGS) embodiment uses a gantry system with a truss substructure and at least one bridge crane on an elevated vessel for assembling the wind turbine blades on the vessel to a nacelle hub supported on the seabed. A Skidding Turbine Installation Crane (STIC) embodiment has a rotatable crane mounted on a skidding pedestal or cantilever structure, providing full access to the vessel deck and blades, and for bringing the assembled nacelle assembly outboard to assemble each blade. A Turbine Assembly Positioning System (TAPS) embodiment includes both a handling system and a crane mounted on a skidding cantilever structure for securing the blades to the assembled tower section and nacelle hub that are cantilevered outboard of the vessel by the handling system. The combination embodiment uses selected components and systems from the TIGS, STIC and TAPS embodiments to provide component and system redundancy and concurrent operation.

The invention relates to the technical field of operation control of hoisting equipment, and provides a ship loading-truck loading integrated operation method and system for mast hoisting equipment. The method comprises the following steps: adjusting an anchor cable of the mast crane to enable the mast crane to be in an initial operation state; a main arm variable-amplitude combined lifting system is started, and the mast crane is controlled to lift the heavy equipment from the cabin at the intelligently optimized lifting angle until the heavy equipment is completely separated from the cabin; the heavy equipment is controlled to hover to a shoreside transition area along with the amplitude variation action of the main arm; in the reverse amplitude variation process or after the reverse amplitude variation process is completed, according to the real-time position of the transport vehicle and the posture of the equipment, dynamic fine adjustment is conducted on the operation path, and the dynamic fine adjustment comprises adjustment of the amplitude variation angle of a main arm, the lifting height and the horizontal movement track of the equipment; and the equipment is controlled to fall to a transport vehicle plate, and the postures of the lifting points and the alignment deviation of the equipment and the vehicle plate are continuously monitored in the vehicle falling process till the equipment accurately falls in place, and vehicle loading is completed.

The invention relates to the field of electric drive rotation control, in particular to an electric drive rotation system, a control method and engineering machinery. The electrically-driven rotary system comprises a frame; the rotary table is mounted on the frame through a rotary support, and the control cabin and the rotary table are connected and synchronously rotate; the rotary motor is used for driving the rotary table to rotate relative to the frame through the rotary speed reducer and the rotary support, and the rotary motor is in communication connection with the motor controller; an angle sensor configured to detect a rotation angle of the turntable relative to the frame; the vehicle-mounted controller is in communication connection with the motor controller, a rotary handle in the control room and the angle sensor; the equivalent rotating speed capable of representing user perception in the control room is obtained through the rotating angle, collected by the angle sensor, of the rotary table, and closed-loop control over the speed of the electric rotary system is achieved with the equivalent rotating speed, the request rotating speed of the rotary handle and the target rotating speed of the rotary motor as control parameters. And rotation shaking caused by a gear meshing clearance is reduced.

The invention discloses a tower crane slewing bearing and a top section adding tower crane with the same. The tower crane slewing bearing comprises a bearing body, a through hole allowing a tower section to penetrate through is formed in the bearing body, a connecting assembly used for being assembled with a sleeve frame of a tower crane is fixed to the lower end of the bearing body, and tower section locking pieces used for being locked with the top of the tower section are arranged at the positions, corresponding to the through hole, of the lower end of the bearing body respectively. The lower end of the support body is provided with a driving mechanism used for driving the tower section locking piece to move into the through hole or to the outer side of the through hole. The top section adding tower crane comprises a rotary support. According to the tower crane slewing bearing, the slewing bearing and the tower sections can be stably locked when the sections are not added through the arrangement of the tower section locking pieces, the tower section locking pieces can be driven to move to avoid the tower sections passing through the through holes when the sections are added to the top, and the safety of tower crane operation is effectively improved.

The utility model provides a lifting device for a tower crane. The lifting device comprises a mounting seat, a bracket, a hanging bracket and a steel wire rope, the mounting seat is fixed to the top of a cabin, the support is mounted on the mounting seat, and the hanging bracket is arranged at the top of the support and provided with the hoisting pulley block. A lifting pulley block is arranged at the rear end of the on-tower crane, and when the on-tower crane is vertically arranged, the lifting pulley block and the hoisting pulley block are oppositely arranged; the hoisting pulley block comprises at least one hoisting pulley which is coaxially arranged, and the lifting pulley block comprises at least one lifting pulley which is coaxially arranged; a guide pulley block is arranged on a suspension arm of the on-tower crane; when the on-tower crane is lifted, one end of the steel wire rope is fixed on the on-tower crane or the hanging bracket, and the other end of the steel wire rope penetrates through the lifting pulley block, the hoisting pulley block and the guide pulley block and then is connected to a power unit arranged below the fan tower; the power unit tightens the steel wire rope to lift the on-tower crane.

A crane for use on an offshore vessel is provided with a boom restrainer, wherein the boom restrainer is a hydro-pneumatic boom restrainer, for reducing upward pivoting of the boom, when the boom is in the top zone, wherein the boom restrainer includes: multiple hydraulic cylinders, each having a hydraulic circuit and a cylinder rod with a cylinder head, wherein the cylinders are mounted on the crane structure with the cylinder heads directed towards the boom of the crane, preferably are mounted on a stay of the crane structure, a catcher for each hydraulic cylinder, wherein each catcher is mounted on the boom and is configured for receiving the cylinder head of the corresponding hydraulic cylinder, and to lock the cylinder head, preferably pivotable locks the cylinder head, relative to the boom, when the boom pivots upwards in the top zone; a gas buffer for each hydraulic cylinder, wherein each gas buffer is mounted to the corresponding hydraulic cylinder, and is connected to the hydraulic circuit of the corresponding hydraulic cylinder via a medium separator, wherein the gas buffer forces the hydraulic cylinder in an extended position, and wherein the volume ratio between the hydraulic cylinder and the gas buffer is such that the hydraulic cylinder acts as a progressive spring, e.g. the gas buffers each have a size in the range of 1000-1400 litre, for example 1200 litre and the hydraulic cylinders each have a size in the range of 800-1000 litre, for example 900 litre, and preferably the ratio between the volume of the gas buffer and the volume of the associated hydraulic cylinder is 4:3.

The invention relates to a crane for assembly and installation of offshore wind turbines on an offshore location, to a vessel for assembly and installation of offshore wind turbines on an offshore location, and to a method for assembly and installation of offshore wind turbines on an offshore location. According to the invention the crane is provided with a base section and a top section, wherein the top section is rotatable supported by a bearing, and can be rotated with the wind turbine hoisting device relative to the base section about a vertical axis, wherein a first trolley guide is mounted to a top section of the installation crane for giding a vertically mobile wind turbine supporting trolley. According to the invention the vessel is provided with one or more assembly stations on different sides of the installation crane.

Dynamic energy transfer (DET) systems are costly and time-consuming to install. Accordingly, an installation system is disclosed that comprises stowage for rail segments and poles, two strategically positioned cranes, and / or strategically positioned platforms, to enable less expensive and faster installation of the various components of a DET system. Installation, utilizing the installation system, can significantly decrease the cost of installation, while increasing the rate of installation and maintaining safety.

The invention relates to the technical field of derricks, and particularly discloses a steel rope type derrick rotation supporting mechanism with an overturn-preventing function, which comprises a safety ring, the top of the safety ring is fixedly connected with a rotation upper seat, so that when the rotation upper seat deflects, the safety ring abuts against the bottom of a rotation lower seat, and an overturn-preventing mechanism is arranged at the bottom of the safety ring. Deflection force acts on the fixed derrick section at the bottom of the lower rotary seat through the anti-overturning mechanism, so that the number of supported points of the rotary support, the upper rotary seat and the like after deflection is increased, a safety ring, the upper rotary seat and the like are supported through multiple positions, and the anti-overturning capacity of the rotary derrick section, a suspension arm and the like is improved. Besides, most of other structures, except for the mounting sleeve, of the anti-overturning mechanism are integrated on the anti-overturning rod, the anti-overturning mechanism can be conveniently and integrally disassembled and assembled, a worker can conveniently maintain, replace and the like the anti-overturning mechanism at high altitude, and anti-overturning use is not affected.

The utility model relates to the technical field of equipment disassembly, and discloses a disassembly tool which comprises a fixed seat, a mounting structure is arranged on the fixed seat, and the mounting structure is suitable for clamping at least part of the fixed seat to the top of an integrated cabinet; a sliding assembly; the hoisting assembly comprises a pulley assembly and a traction piece. According to the disassembling tool, in the field environment, even if a foundation is a stone muddy road surface and the carrying space is limited, transportation and stable installation can be guaranteed, the position of the hoisting assembly can be flexibly adjusted, a converter can be conveniently hoisted at different positions, and the disassembling tool is suitable for various complex field layouts; according to the utility model, the traction piece can be operated manually, so that the problem that an electric tool cannot be used due to inconvenience in on-site electricity taking is avoided, the cost of the tool is greatly reduced, and the tool is convenient to carry and operate.

The invention discloses a crane falling and amplitude variation control method and device, electronic equipment and a storage medium. The crane falling and amplitude changing control method comprises the steps that current working condition information of a crane is obtained; on the basis of a pre-generated four-dimensional feed-forward control model, a feed-forward control current value is calculated according to the current working condition information, and the four-dimensional feed-forward control model represents the mapping relation between the working condition information and the main arm descending valve control current of the crane in the constant-speed descending state; the actual descending speed of the main arm of the crane is obtained and compared with the set expected descending speed, and a closed-loop correction current value is calculated through a closed-loop control algorithm based on the speed error; and superposing the feedforward control current value and the closed-loop correction current value to obtain a total control current, and outputting the total control current to a main arm descending valve of the crane so as to control the descending speed of the main arm of the crane. According to the invention, the descending process of the main arm is stable and constant in speed, and the stability and safety of the hydraulic control crane in the amplitude variation action are improved.

A method and apparatus to invert a robotic arm, includes an angling adaptor and swing arm. The angling adaptor includes a truck or crane boom head adaptor and a hinge coupler. The swing arm extends downwardly from the angling adaptor and may include a boom adaptor arm and a jib. The lower end of the swing arm is mounted to the main beam of the robotic arm. The hinge coupler mounts to the upper end of the crane or truck boom. The robotic arm is mounted on the swing arm so as to downwardly orient the insulators on the robotic arm. A lowermost end of each insulator is adapted for releasably holding an electrical bypass which may include a bus bar and electrical cable jumpers.

The invention belongs to the technical field of lifting tools, and particularly discloses a lifting device oil way system, a lifting device, a jack, a pressing machine and a crane. The oil way system of the lifting device comprises a lifting oil cylinder, an oil tank, a first oil inlet way, a second oil inlet way and an oil return pipeline, the first oil inlet path is an oil inlet path of the gear pump assembly; and the second oil inlet path is an oil inlet path of the plunger pump assembly. When the lifting device is in the no-load or low-pressure condition, the gear pump assembly can rapidly pump in much hydraulic oil with small pressure so that the lifting device can rapidly ascend or descend, the defect that in the prior art, the displacement speed of a hydraulic lifting pump is low under the no-load or low-pressure condition is overcome, and the user experience is improved; when the hydraulic lifting pump is in a high-pressure condition, the plunger pump assembly can pump high-pressure hydraulic oil into the lifting oil cylinder so that the lifting oil cylinder can ascend or descend slowly, the lifting device can move slowly, and the normal use requirement of a user is met.

The utility model provides an active dynamic balance tower crane which comprises a tower body, a working arm and a balance arm, wherein the working arm and the balance arm are respectively arranged on two sides of the tower body; wherein a hoisting / walking trolley is arranged on the working arm, and a dynamic counterweight mechanism is arranged on the balance arm. Compared with a traditional static counterweight mode, the active dynamic balance tower crane has the advantages that the dynamic counterweight mechanism can avoid bending deformation of the tower body caused by unbalanced torque of the working arm and the balance arm in a non-working state; in the working state, the front-back shaking amplitude of the tower crane can be reduced, the safety performance of the tower crane is improved, the working environment of a tower crane driver is improved, and the fear of the driver is reduced. In addition, compared with a balancing weight in passive arc motion, the mechanism can actively adjust the balance moment to be equal to the working moment in real time according to the change of the working moment on the working arm, and as the working moment is actively balanced, the overturning moment to a foundation is minimum, the safety performance of the tower crane is improved, and the accident occurrence probability is reduced.

A dynamic lift-off control device that is mounted on a crane including a boom and a winch for winding a wire rope and that controls dynamic lift-off of a suspended load, wherein: the dynamic lift-off control device comprises a load detection unit that detects a load acting on the boom, and a control unit that controls a winding action of the winch and a hoisting action of the boom; and the control unit controls the hoisting of the boom by using a control signal, which is generated on the basis of the change over time in the value detected by the load detection unit and to which a filter for attenuating a frequency component in a prescribed range, to suppress swaying of the suspended load is applied.