Lifting apparatus for highly-mounted device and control method thereof
AssigneeReel Tech Co., Ltd.
InventorJeong Hoon Shin
Life of this patent
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Abstract
Disclosed is a control method of a lifting apparatus for a highly-mounted device. The control method includes (a) outputting a descending signal in a state where the main body and the lifting body are coupled; (b) determining whether the lifting body is normally released downward from the main body according to the descending signal; and (c) stopping the driving motor or executing the step (a) again when the lifting body is not normally released downward, wherein in the step (b), it is determined whether the lifting body is normally released downward from the main body by checking whether a weight of the lifting body is applied to the wire rope.
Claims13
A control method of a lifting apparatus for a highly-mounted device, the lifting apparatus including a main body at which a hollow drum for winding a wire rope and a driving motor for giving a rotating force to the drum are installed, a lifting body suspended from the wire rope and having a device coupling portion provided at a lower end thereof, and an upper contact point and a lower contact point respectively provided at the main body and the lifting body to make contact with each other when the lifting body ascends and is coupled to the main body by winding the wire rope, the control method comprising:
- (a) outputting a descending signal in a state where the main body and the lifting body are coupled;
- (b) determining whether the lifting body is normally released downward from the main body according to the descending signal;
- and
- (c) stopping the driving motor or executing the step (a) again when the lifting body is not normally released downward,
- wherein in the step (b), it is determined whether the lifting body is normally released downward from the main body by checking whether a weight of the lifting body is applied to the wire rope;
- wherein in the step (b), when a guide roll configured to support the wire rope is moved due to the weight of the lifting body to press a limit switch, it is determined that the lifting body is normally released downward.
A lifting apparatus for a highly-mounted device, comprising:
- a main body installed at a predetermined height so that a hollow drum for winding a wire rope and a driving motor for giving a rotating force to the drum are installed thereto;
- a lifting body suspended from the wire rope and having a device coupling portion provided at a lower end thereof;
- a coupling unit including a receiving structure located at a lower portion of the main body and having an open lower portion to be coupled with the lifting body, and a stopper installed at the receiving structure to give a fall prevention function for the lifting body;
- an upper contact point and a lower contact point respectively installed at the main body and the lifting body to make contact with each other when the lifting body ascends and is coupled to the main body by winding the wire rope;
- a plurality of guide rolls disposed at a side portion and an upper portion of the drum to support a wire rope unwound from the drum and guide the unwound wire rope into the hollow of the drum;
- a limit switch located at a lower portion of at least one of the plurality of guide rolls and disposed to selectively contact a portion of the guide roll;
- and
- a control unit configured to control an operation of the driving motor by recognizing whether a weight of the lifting body is applied to the wire rope and determining whether the lifting body and the stopper are coupled or separated;
- wherein the control unit determines that the lifting body is normally released downward by recognizing that the weight of the lifting body is applied to the wire rope so that the guide roll is moved to press the limit switch, and the control unit determines that the lifting body is normally caught by the stopper by recognizing that the weight of the lifting body applied to the wire rope is released so that the guide roll returns to be separated from the limit switch.
Dependencies are inferred from the claim text.