Handling machine using lifting magnet

A handling machine using a lifting magnet, the handling machine having a lifting magnet device, a lower traveling body, and an upper rotary body, the handling machine being characterized by comprising:

• a power source;
• a storage battery for storing electric energy from the power source;
• and
• a drive source for a driven body in which regenerative electric energy can be produced in the handling machine, wherein
• the power source and the storage battery are connected to be capable of supplying electric energy to the lifting magnet device,
• the drive source for the driven body in which the regenerative electric energy can be produced is connected to be capable of supplying its own regenerative electric energy to the storage battery,
• the drive source for the driven body is also connected to be capable of supplying the regenerative electric energy to the lifting magnet device without the intervention of the storage battery, and
• the lifting magnet device is connected to be capable of supplying the regenerative electric energy, which is produced when the lifting magnet device is released, to the drive source for the driven body without the intervention of the storage battery.

A method for operating a handling machine using a lifting magnet, the handling machine having a lifting magnet device, a lower traveling body, and an upper rotary body, the method comprising:

• a first electric energy supply step of storing electric energy from a power source in a storage battery;
• a second electric energy supply step of supplying electric energy from the power source and the storage battery to the lifting magnet device;
• and
• a third electric energy supply step of supplying regenerative electric energy from a drive source for a driven body, in which the regenerative electric energy can be produced, to the lifting magnet device without the intervention of the storage battery.

A method for operating a handling machine using a lifting magnet, the handling machine having a lifting magnet device, a lower traveling body, and an upper rotary body, the method comprising:

• a first electric energy supply step of storing electric energy from a power source in a storage battery;
• a second electric energy supply step of supplying electric energy from the power source and the storage battery to the lifting magnet device;
• a third electric energy supply step of supplying regenerative electric energy from a drive source for a driven body, in which the regenerative electric energy can be produced, to the lifting magnet device without the intervention of the storage battery;
• and
• a fourth electric energy supply step of supplying regenerative electric energy, produced when the lifting magnet device is released, from the lifting magnet device without the intervention of the storage battery, to the drive source for the driven body, in which the regenerative electric energy can be produced.