Material or article handling – Apparatus for charging a load holding or supporting element... – Load holding or supporting element including gripping means
Patent
1991-07-24
1993-03-16
Huppert, Michael S.
Material or article handling
Apparatus for charging a load holding or supporting element...
Load holding or supporting element including gripping means
1983391, 1984684, 1984633, 414797, B65H 2900
Patent
active
051939673
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a device for transferring a workpiece to be presented for working such as bending and, more particularly, to a device which transfers the workpiece from a withdrawal station to a scheduled place for the working, and after completion of the working, from the scheduled place to a collecting station.
Some transfer devices comprises a movable arm and suction cups provided on the movable arm. The arm picks up a sheet from the pile of metal sheet at the withdrawal station and carries it to a manipulator of a working machine such as a bending machine. After completion of the working, the arm receive the worked sheet and carries it to the collecting station.
In such a transfer device as described above, when transferring the workpiece, the time required for the transferring is determined by the speed of movement of the arm. Accordingly, it is limited by preformance of the arm, and if one wishes to shorten the transferring time, larger power and construction are required.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a transfer device which can promptly transfer the workpiece with simple and compact structure from the withdrawal station to the scheduled position and from the scheduled position to the collecting station.
According to the present invention, this object is achieved by a transfer device comprising carrying means for picking up the workpiece from a withdrawal station, means for moving the carrying means from a withdrawal station to a scheduled position for working and vice versa, and chute means for receiving the workpiece for transfer to a collecting station upon completion of the working, the chute means being attached to the carrying means.
As will become clear in the course of the following description, the transfer device according to the present invention is simple and compact and can be associated with any known type of manipulator device without interfering with movements of the manipulator and without obstructing access to the withdrawal and collecting stations.
Further characteristics and advantages of the present invention will become clear from the detailed description which follows with reference to the appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a loading and unloading station for metal sheet including a transfer device according to the present invention;
FIG. 2 is a plan view the loading and unloading station of FIG. 1;
FIG. 3 is a front elevational view of the transfer device according to the present invention;
FIG. 4 is a side elevational view taken on the arrow IV of FIG. 1 in a different working configuration;
FIG. 5 is a perspective view of the part indicated by the arrow V of FIG. 1; and
FIGS. 6, 7 and 8 are schematic views corresponding to FIG. 4 and showing the operating sequence of the device according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a station for the loading and unloading of workpieces 2 constituted by elongate, rectangular metal sheets which are to undergo bending.
The loading and unloading station includes a withdrawal station 4 and a collecting station 6 between which a transfer device 8 is located. The withdrawal station 4 is constituted by a trolley 10 which is movable on rails 12 and on which a pile of workpieces 2 to be worked is arranged. As can be seen in FIG. 2, the trolley 10 has a plurality of permanent magnets 11 arranged along two adjacent sides of the trolley 10. The magnets 11 separate the workpieces 2 and draw them to a predetermined configuration defined by the positions of the corners A of the workpiece 2.
The collecting station 6 is constituted by a trolley 14 in which a product 20 produced by working are deposited in the manner which will be described below. The trolley 14 is also movable on rails 22 which extend parallel to the rails 12 of the withdrawal station 4.
The transfer device 8 comprised a pair of box-shaped support and guide uprights 24 which face each o
REFERENCES:
patent: 3892324 (1975-07-01), Faletti, Jr.
patent: 3910426 (1975-10-01), Wagner
patent: 4365920 (1982-12-01), Morgan
patent: 5080552 (1992-01-01), Takahashi et al.
Amada Company Limited
Huppert Michael S.
Underwood Donald W.
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