Lifting device (pallet device) with pivotal arm

Details Lifting device (pallet device) with pivotal arm Lifting device (pallet device) with pivotal arm

1999-04-01

2001-09-18

Fischetti, Joseph A. (Department: 2167)

Material or article handling

Apparatus for charging a load holding or supporting element...

C414S226050, C414S744300, C414S799000, C198S308100, C198S374000

Reexamination Certificate

active

06290448

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates to a lifting device, in particular a pallet device, comprising a pivotal arm of at least two pivotally interconnected arm sections and with a lifting head, in particular a suction head, at the free end of the pivotal arm.
Pallet devices having a pivotal arm, in particular a horizontal tilt arm, on an upright support column, are often used for loading or unloading bulk packages, in particular cartons, onto/from pallets. The horizontal pivotal arm or tilt arm is conventionally equipped with three controllable rotary axes and furthermore vertically movable on the support column. At the end of the pivotal arm is arranged a tool for accommodation of loads, in particular a lifting head, suction head, grabber or the like.
Pallet devices have to perform many varied conveying tasks. In practice, the task lies in particular in delivering arriving objects, in particular cartons of different size, shape or different content, according to a specific distribution programme to a plurality of pallets and to set them down thereat in layers and in a precise position. This is the main object of the invention.
SUMMARY OF THE INVENTION
The object lies in further development of a pallet device of the aforedescribed type in order to improve the application of the pallet device by relatively simple operations, in particular possible relative positions of the receiving tool or lifting head when receiving and/or setting down an object.
The object is achieved in that the receiving tool or the lifting head is mounted on a separate support arm which is itself pivotally mounted to the end of the pivotal arm.
According to the invention, a/an (additional) support arm is mounted on a controllable rotary axis at the free end of the pivotal arm, at the free end of which is arranged the lifting head which is itself rotary around a (vertical) axis.
This makes possible a highly variable movement programme of the pallet device with automatic or programmed control. In particular, different objects, for example cartons, can be set down on pallets in layers in a specified formation, i.e. also with simultaneous operation of a plurality of, for example, three pallets on separate parallel palette tracks.
The support arm, which is connected to the rotary axis of the pivotal arm, is movable into any angular position relative to the pivotal arm. According to the invention, the lifting head is pivotal by a simple operating element, in particular by a (pneumatic) cylinder, around a central upright axis, i.e. in two alternative positions which are offset by 90° relative to each other, i.e. in the longitudinal direction and in the transverse direction to the support arm. This ensures simple and effective movability of the lifting head.


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Patent Abstracts of Japan, vol. 7, No. 133 (M-221), Jun. 10, 1983 & JP 58 047725 A (Nomura Sangyo KK), Mar. 19, 1983.

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