Patent ID: 8070201

Claim:
An arrangement for handling packaging units with the aid of a robot, wherein the arrangement comprises: a mounting part which is adapted for fixation to a robot arm, a tool carrier which is adapted to carry one or more handling tools, and a number of couplings each of which includes a first engagement member affixed to the mounting part, and a second engagement member affixed to the tool carrier wherein the second engagement member is restrictively movable axially in relation to the first engagement member such that under the force of gravity acting on the tool carrier, the second engagement member in engagement with the first engagement member, will adopt a latching position relative to the first engagement member, wherein the working position of the tool carrier relative to the mounting part is defined when all second engagement members are in their latching positions, wherein the arrangement further comprises a spring which is adapted to apply a separating force between the mounting part and the tool carrier such as to press the second engagement members in a direction towards their latching positions in engagement with the first engagement member, wherein the spring is selected from the group of springs consisting of an air spring or a liquid spring and the spring further comprises a piston that is movable in a pressure cylinder, such that two different pressures can be applied to one side of the piston for adiustment of the spring between two mutually different modes corresponding to two mutually different magnitudes of said separating force, and that the spring further comprises a link arm which is pivotally mounted to the tool carrier and one end of which is coupled to the piston and the other end of which can lie in abutment with the mounting part, the link arm being configured geometrically for reducing the force with which the spring acts on the mounting part when the tool carrier is at least one of inclined relative to the mounting part or displaced in a direction towards said mounting part.