US 4,068,577 A · Work positioning table

Abstract

A work supporting table has a carriage which extends beneath the bed of a press and a table top which extends over the bed. The carriage has wheels which rotate about eccentric spindles on the ends of the two axle shafts. Chains are wrapped around these shafts and forces are applied to the chains by an air cylinder mounted on the carriage. When the chains are drawn taut, the axles rotate such that the spindles move downwardly and cause the wheels to descend with respect to the carriage frame and thereby lift the table upwardly. The wheels when so disposed support the table with its table top slightly above the press bed. Conversely when the chains are released, the wheels move upwardly and the table top descends onto the press bed which supports it so that a force applied to a workpiece on the table top is resisted by the press bed.

Claims10

Dependent claims

A table comprising:

a carriage frame;
a table top supported by the carriage frame;
a pair of parallel axle shafts mounted on the carriage frame and having eccentric spindles at their ends;
wheels mounted on the spindles and rotatable relative thereto;
and means for rotating the axle shafts in unison so as to lower the wheels relative to the carriage frame and thereby elevate the carriage frame and table top, the means for rotating the axle shafts including chains wrapped around the axle shafts and means remote from the shafts for exerting a force on the chains.

2 more elements

In combination with a press including a rigid frame extended upwardly from a floor, a bed mounted firmly on the frame in an elevated position above the floor, and a ram supported on the frame above the bed and being movable toward and away from the bed, a table for supporting a workpiece such that the ram can exert a force on the workpiece, said table comprising:

a carriage frame located beneath the bed;
at least one upright supporting member extended upwardly from the carriage frame beyond each side of the press bed, the spacing between the supporting member on one side of the press bed and the supporting member on the other side being greater than the width of the press bed;
a table top attached to the supporting members and extended over the press bed, whereby the press bed is located between the table top and the press bed;
parallel axles extended across the carriage frame and being mounted thereon such that they are capable of rotating with respect to the frame, the axles having eccentric portions at their ends;
wheels mounted on the eccentric portions and being rotatable wih repsect to the eccentric portions;
and means on the carriage frame for rotating the axles to cause the eccentric portions to move the wheels thereon between supporting and non-supporting positions, the wheels when in the supporting position causing the table top to be elevated slightly above the press bed so that the table may on its wheels be moved with respect to the press bed, the wheels when in the non-supporting position being higher on the carriage frame than when in the supporting position and enabling the table top to rest on the press bed so that a force applied by the ram to a workpiece on the table top will be resisted by the press bed.

3 more elements

Dependencies are inferred from the claim text.

Work positioning table

Life of this patent

Work positioning table

Life of this patent

Abstract

Claims10