JP2010150024A - Crane device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly ground a lowering cargo in a crane device wherein traveling of the cargo hooked by a flexible suspending member suspended from a hoisting machine is started by displacement caused by pushing in a horizontal direction by a worker, displacement caused by the suspending member of which swinging rotation center is different from the position just above the grounding of the cargo is reciprocated two-dimensionally to be reduced, and a traveling speed is increased or decreased in proportion to the magnitude of the displacement. <P>SOLUTION: The crane device includes an operation pendant for inputting only a command of hoisting of the suspending member by the worker, a force measuring means for measuring downward force acting on the suspending member 3, a cargo weight calculating and storing means for calculating and storing the weight of the cargo based on the input from the operation pendant and the measurement value of the force measuring means, an operation force calculating means for calculating operation force of the worker in the vertical direction based on the cargo weight data of the cargo weight calculating and storing means and the measurement value of the force measuring means, and a power supply means for supplying power in correspondence with the calculated value of the operation force calculating means to an electric motor of the hoisting machine. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a crane apparatus.

Conventionally, as one of the crane devices, a load suspended from a flexible suspension member suspended from a hoisting machine is started by the occurrence of a displacement caused by an operator pushing it horizontally, and the suspension member The displacement that occurs when the center of rotation of the swing is different from the position directly above the landing of the load is reduced by reciprocating in two dimensions, and the traveling speed is increased or decreased in proportion to the magnitude of the displacement. There is something.
Japanese Patent Laid-Open No. 7-25584

However, in the above-described crane device, for example, when the core is set at a predetermined position of the mold, there is a problem that the core cannot be landed accurately by moving up and down at the moment when the core has landed on the mold. It was.
This invention is made | formed in view of said situation, The objective is to provide the crane apparatus which can land the load which descends smoothly.

  In order to achieve the above object, the crane device according to the present invention travels due to the occurrence of displacement caused by an operator pushing a load suspended on a flexible suspension member suspended from a hoisting machine in the horizontal direction. The displacement generated when the rotation center of the swing of the suspension member is different from the position directly above the landing of the load is reduced by reciprocating in two dimensions, and the traveling speed is proportional to the magnitude of the displacement. In a crane apparatus configured to increase or decrease, an operation pendant for an operator to input a command for only lifting the suspension member, a force measurement means for measuring a downward force acting on the suspension member, and an operation The load weight calculation storage means for calculating and storing the weight of the load based on the input from the pendant and the measurement value of the force measurement means, the load weight data of the load weight calculation storage means, and the measurement value of the force measurement means Operating force calculating means for calculating the operating force of the operator in the vertical direction, and power supply means for supplying electric power corresponding to the calculated value of the operating force calculating means to the motor of the hoisting machine. .

In such a configuration, the operator presses the push button of the operation pendant to lift the load by the hanging member, and then releases the hand from the push button. Thereby, the load weight calculation storage means calculates and stores the load weight. Next, the operator pushes the load in the horizontal direction and transports the load to the desired position via the crane device. Subsequently, when the worker pushes the load downward, the operation force calculation means operates the operator in the downward direction. The force is calculated and the calculated value is input to the power supply means. As a result, electric power corresponding to the calculated value is supplied from the power supply means to the motor of the hoisting machine, the electric motor of the hoisting machine is driven in reverse to lower the load, and the force measuring means acts downward on the suspension member. Continue to measure force. When the load has landed and the measured value of the force measuring means has suddenly decreased, the power supply means stops supplying power to the motor of the hoisting machine and completes the landing of the load.

As is apparent from the above description, the crane device of the present invention includes an operation pendant for an operator to input a command for only lifting the suspension member, and force measuring means for measuring a downward force acting on the suspension member. And a load weight calculation storage means for calculating and storing the weight of the load based on the input from the operation pendant and the measurement value of the force measurement means, and the load weight data of the load weight calculation storage means and the measurement value of the force measurement means Operating force calculating means for calculating the operator's vertical operating force based on the power, and a power supply means for supplying the electric power corresponding to the calculated value of the operating force calculating means to the motor of the hoisting machine. The weight of the load is accurately calculated by simply lifting it, and the operator's downward operating force is calculated based on the measured value of the force measurement means and the weight of the load, and the load is lowered according to the operating force. , Then, by stopping the electric motor of the measured values sharply receiving and hoist of the force measuring means, it exhibits an excellent practical effect of such luggage it is possible to smoothly landed on a desired position.

Hereinafter, an embodiment of a crane apparatus to which the present invention is applied will be described in detail with reference to FIGS. 1 and 2. The crane device 1 is a crane device disclosed in Japanese Patent Application Laid-Open No. 7-25584, in which a core as a load hung on a rope 3 as a flexible suspension member suspended from a hoisting machine 2 is used. The travel starts when the displacement is generated by the operator pushing in the horizontal direction, and the displacement generated when the rotation center of the swing of the rope 3 is different from the position directly above the landing of the load is reciprocated in two dimensions. The travel speed is increased or decreased in proportion to the magnitude of the displacement.

As shown in FIGS. 1 and 2, the crane device 1 includes an operation pendant for an operator to input a command for only winding the rope 3, and a force for measuring a downward force acting on the rope 3. A measuring means (not shown), a core weight calculation storage means (not shown) for calculating and storing the weight of the core as a load based on the input from the operation pendant and the measured value of the force measuring means; An operation force calculation means (not shown) for calculating the operator's vertical operation force based on the core weight data of the core weight calculation storage means and the measured value of the force measurement means, and a calculated value of the operation force calculation means Power supply means (not shown) for supplying electric power corresponding to the above to the electric motor of the hoisting machine.

The core weight calculation storage means and the operating force calculation means are configured by a computer.

In such a configuration, the operator presses the push button of the operation pendant and lifts the load with the hanging member, and then releases the hand from the push button. Thus, the core weight calculation storage means calculates and stores the weight of the core. Next, when the operator pushes the core in the horizontal direction and conveys the core to a desired position via the crane device 1, and subsequently the operator pushes the core downward, the operation force calculation means is operated by the operator. The downward operating force is calculated and the calculated value is input to the power supply means. As a result, electric power corresponding to the calculated value is supplied from the electric power supply means to the electric motor of the hoisting machine, the electric motor of the hoisting machine is driven in reverse to lower the core, and the force measuring means acts downward on the rope 3. Continue to measure force. When the measured value of the force measuring means suddenly decreases due to the landing of the core, the power supply means stops the supply of power to the motor of the hoist and completes the landing of the load.

It is a front view which shows one Example of the crane apparatus to which this invention is applied. It is a right view of FIG.

Explanation of symbols

1 Crane device 2 Hoisting machine 3 Rope

Claims (1)

The baggage suspended from the flexible suspension member suspended from the hoisting machine starts running due to the occurrence of displacement caused by the operator pushing it horizontally, and the center of rotation of the swing of the suspension member is In the crane apparatus configured to reduce the displacement caused by being different from the position directly above the landing by reciprocating in two dimensions, and the traveling speed increases or decreases in proportion to the magnitude of the displacement,
An operation pendant for an operator to input a command only for winding the suspension member;
Force measuring means for measuring a downward force acting on the suspension member;
A load storage unit for calculating and storing a load weight based on an input from the operation pendant and a measurement value of the force measurement unit;
An operation force calculation means for calculating the operator's vertical operation force based on the load weight data in the load weight calculation storage means and the measurement value of the force measurement means;
Power supply means for supplying power corresponding to the calculated value of the operating force calculation means to the motor of the hoisting machine;
A crane apparatus comprising: