center of the shed and transports the same out of the shed said drawing gripper comprising a fixed member carried by a support connected to the means for moving forward the gripper itself and a movable member oscillating in respect of the fixed member about a vertical axis in a horizontal plane parallel to that containing said fixed member this latter is provided with a hook end extending in a vertical plane with the inner upper part of which cooperates the end of the movable member under the action of return spring means application_number US 61605975 A description with reference to fig1 it may be seen that the gripper according to the invention comprises a first lower fixed member 1 and a second movable member 2 being pivoted on the first about the vertical axis 3 the gripper member 1 will be supported by a base preferably of plastic material not shown the characteristics of which may be those of similar components in conventional grippers said member 1 terminates at the end of the gripper in a hook 4 arranged in a vertical plane and clearly shown in fig1 said member 1 is further provided with two lateral supports integral therewith of which an intermediate support 5 carries the pivot 3 for oscillating the movable member 2 and a rear support 6 houses the return spring means for the movable member 2 the movable 2 is formed as an elongated bar being beveled at the front end 2 39 widened at the centre with an ear 7 for pivoting on the pivot.